1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  *  thinkpad_acpi.c - ThinkPad ACPI Extras
4  *
5  *  Copyright (C) 2004-2005 Borislav Deianov <borislav@users.sf.net>
6  *  Copyright (C) 2006-2009 Henrique de Moraes Holschuh <hmh@hmh.eng.br>
7  */
8 
9 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
10 
11 #define TPACPI_VERSION "0.26"
12 #define TPACPI_SYSFS_VERSION 0x030000
13 
14 /*
15  *  Changelog:
16  *  2007-10-20		changelog trimmed down
17  *
18  *  2007-03-27  0.14	renamed to thinkpad_acpi and moved to
19  *  			drivers/misc.
20  *
21  *  2006-11-22	0.13	new maintainer
22  *  			changelog now lives in git commit history, and will
23  *  			not be updated further in-file.
24  *
25  *  2005-03-17	0.11	support for 600e, 770x
26  *			    thanks to Jamie Lentin <lentinj@dial.pipex.com>
27  *
28  *  2005-01-16	0.9	use MODULE_VERSION
29  *			    thanks to Henrik Brix Andersen <brix@gentoo.org>
30  *			fix parameter passing on module loading
31  *			    thanks to Rusty Russell <rusty@rustcorp.com.au>
32  *			    thanks to Jim Radford <radford@blackbean.org>
33  *  2004-11-08	0.8	fix init error case, don't return from a macro
34  *			    thanks to Chris Wright <chrisw@osdl.org>
35  */
36 
37 #include <linux/acpi.h>
38 #include <linux/backlight.h>
39 #include <linux/bitops.h>
40 #include <linux/delay.h>
41 #include <linux/dmi.h>
42 #include <linux/fb.h>
43 #include <linux/freezer.h>
44 #include <linux/hwmon.h>
45 #include <linux/hwmon-sysfs.h>
46 #include <linux/init.h>
47 #include <linux/input.h>
48 #include <linux/jiffies.h>
49 #include <linux/kernel.h>
50 #include <linux/kthread.h>
51 #include <linux/leds.h>
52 #include <linux/list.h>
53 #include <linux/lockdep.h>
54 #include <linux/module.h>
55 #include <linux/mutex.h>
56 #include <linux/nvram.h>
57 #include <linux/pci.h>
58 #include <linux/platform_device.h>
59 #include <linux/platform_profile.h>
60 #include <linux/power_supply.h>
61 #include <linux/proc_fs.h>
62 #include <linux/rfkill.h>
63 #include <linux/sched.h>
64 #include <linux/sched/signal.h>
65 #include <linux/seq_file.h>
66 #include <linux/slab.h>
67 #include <linux/string.h>
68 #include <linux/string_helpers.h>
69 #include <linux/sysfs.h>
70 #include <linux/types.h>
71 #include <linux/uaccess.h>
72 #include <linux/workqueue.h>
73 
74 #include <acpi/battery.h>
75 #include <acpi/video.h>
76 
77 #include <drm/drm_privacy_screen_driver.h>
78 
79 #include <sound/control.h>
80 #include <sound/core.h>
81 #include <sound/initval.h>
82 
83 #include "dual_accel_detect.h"
84 
85 /* ThinkPad CMOS commands */
86 #define TP_CMOS_VOLUME_DOWN	0
87 #define TP_CMOS_VOLUME_UP	1
88 #define TP_CMOS_VOLUME_MUTE	2
89 #define TP_CMOS_BRIGHTNESS_UP	4
90 #define TP_CMOS_BRIGHTNESS_DOWN	5
91 #define TP_CMOS_THINKLIGHT_ON	12
92 #define TP_CMOS_THINKLIGHT_OFF	13
93 
94 /* NVRAM Addresses */
95 enum tp_nvram_addr {
96 	TP_NVRAM_ADDR_HK2		= 0x57,
97 	TP_NVRAM_ADDR_THINKLIGHT	= 0x58,
98 	TP_NVRAM_ADDR_VIDEO		= 0x59,
99 	TP_NVRAM_ADDR_BRIGHTNESS	= 0x5e,
100 	TP_NVRAM_ADDR_MIXER		= 0x60,
101 };
102 
103 /* NVRAM bit masks */
104 enum {
105 	TP_NVRAM_MASK_HKT_THINKPAD	= 0x08,
106 	TP_NVRAM_MASK_HKT_ZOOM		= 0x20,
107 	TP_NVRAM_MASK_HKT_DISPLAY	= 0x40,
108 	TP_NVRAM_MASK_HKT_HIBERNATE	= 0x80,
109 	TP_NVRAM_MASK_THINKLIGHT	= 0x10,
110 	TP_NVRAM_MASK_HKT_DISPEXPND	= 0x30,
111 	TP_NVRAM_MASK_HKT_BRIGHTNESS	= 0x20,
112 	TP_NVRAM_MASK_LEVEL_BRIGHTNESS	= 0x0f,
113 	TP_NVRAM_POS_LEVEL_BRIGHTNESS	= 0,
114 	TP_NVRAM_MASK_MUTE		= 0x40,
115 	TP_NVRAM_MASK_HKT_VOLUME	= 0x80,
116 	TP_NVRAM_MASK_LEVEL_VOLUME	= 0x0f,
117 	TP_NVRAM_POS_LEVEL_VOLUME	= 0,
118 };
119 
120 /* Misc NVRAM-related */
121 enum {
122 	TP_NVRAM_LEVEL_VOLUME_MAX = 14,
123 };
124 
125 /* ACPI HIDs */
126 #define TPACPI_ACPI_IBM_HKEY_HID	"IBM0068"
127 #define TPACPI_ACPI_LENOVO_HKEY_HID	"LEN0068"
128 #define TPACPI_ACPI_LENOVO_HKEY_V2_HID	"LEN0268"
129 #define TPACPI_ACPI_EC_HID		"PNP0C09"
130 
131 /* Input IDs */
132 #define TPACPI_HKEY_INPUT_PRODUCT	0x5054 /* "TP" */
133 #define TPACPI_HKEY_INPUT_VERSION	0x4101
134 
135 /* ACPI \WGSV commands */
136 enum {
137 	TP_ACPI_WGSV_GET_STATE		= 0x01, /* Get state information */
138 	TP_ACPI_WGSV_PWR_ON_ON_RESUME	= 0x02, /* Resume WWAN powered on */
139 	TP_ACPI_WGSV_PWR_OFF_ON_RESUME	= 0x03,	/* Resume WWAN powered off */
140 	TP_ACPI_WGSV_SAVE_STATE		= 0x04, /* Save state for S4/S5 */
141 };
142 
143 /* TP_ACPI_WGSV_GET_STATE bits */
144 enum {
145 	TP_ACPI_WGSV_STATE_WWANEXIST	= 0x0001, /* WWAN hw available */
146 	TP_ACPI_WGSV_STATE_WWANPWR	= 0x0002, /* WWAN radio enabled */
147 	TP_ACPI_WGSV_STATE_WWANPWRRES	= 0x0004, /* WWAN state at resume */
148 	TP_ACPI_WGSV_STATE_WWANBIOSOFF	= 0x0008, /* WWAN disabled in BIOS */
149 	TP_ACPI_WGSV_STATE_BLTHEXIST	= 0x0001, /* BLTH hw available */
150 	TP_ACPI_WGSV_STATE_BLTHPWR	= 0x0002, /* BLTH radio enabled */
151 	TP_ACPI_WGSV_STATE_BLTHPWRRES	= 0x0004, /* BLTH state at resume */
152 	TP_ACPI_WGSV_STATE_BLTHBIOSOFF	= 0x0008, /* BLTH disabled in BIOS */
153 	TP_ACPI_WGSV_STATE_UWBEXIST	= 0x0010, /* UWB hw available */
154 	TP_ACPI_WGSV_STATE_UWBPWR	= 0x0020, /* UWB radio enabled */
155 };
156 
157 /* HKEY events */
158 enum tpacpi_hkey_event_t {
159 	/* Hotkey-related */
160 	TP_HKEY_EV_HOTKEY_BASE		= 0x1001, /* first hotkey (FN+F1) */
161 	TP_HKEY_EV_BRGHT_UP		= 0x1010, /* Brightness up */
162 	TP_HKEY_EV_BRGHT_DOWN		= 0x1011, /* Brightness down */
163 	TP_HKEY_EV_KBD_LIGHT		= 0x1012, /* Thinklight/kbd backlight */
164 	TP_HKEY_EV_VOL_UP		= 0x1015, /* Volume up or unmute */
165 	TP_HKEY_EV_VOL_DOWN		= 0x1016, /* Volume down or unmute */
166 	TP_HKEY_EV_VOL_MUTE		= 0x1017, /* Mixer output mute */
167 	TP_HKEY_EV_PRIVACYGUARD_TOGGLE	= 0x130f, /* Toggle priv.guard on/off */
168 	TP_HKEY_EV_AMT_TOGGLE		= 0x131a, /* Toggle AMT on/off */
169 
170 	/* Reasons for waking up from S3/S4 */
171 	TP_HKEY_EV_WKUP_S3_UNDOCK	= 0x2304, /* undock requested, S3 */
172 	TP_HKEY_EV_WKUP_S4_UNDOCK	= 0x2404, /* undock requested, S4 */
173 	TP_HKEY_EV_WKUP_S3_BAYEJ	= 0x2305, /* bay ejection req, S3 */
174 	TP_HKEY_EV_WKUP_S4_BAYEJ	= 0x2405, /* bay ejection req, S4 */
175 	TP_HKEY_EV_WKUP_S3_BATLOW	= 0x2313, /* battery empty, S3 */
176 	TP_HKEY_EV_WKUP_S4_BATLOW	= 0x2413, /* battery empty, S4 */
177 
178 	/* Auto-sleep after eject request */
179 	TP_HKEY_EV_BAYEJ_ACK		= 0x3003, /* bay ejection complete */
180 	TP_HKEY_EV_UNDOCK_ACK		= 0x4003, /* undock complete */
181 
182 	/* Misc bay events */
183 	TP_HKEY_EV_OPTDRV_EJ		= 0x3006, /* opt. drive tray ejected */
184 	TP_HKEY_EV_HOTPLUG_DOCK		= 0x4010, /* docked into hotplug dock
185 						     or port replicator */
186 	TP_HKEY_EV_HOTPLUG_UNDOCK	= 0x4011, /* undocked from hotplug
187 						     dock or port replicator */
188 	/*
189 	 * Thinkpad X1 Tablet series devices emit 0x4012 and 0x4013
190 	 * when keyboard cover is attached, detached or folded onto the back
191 	 */
192 	TP_HKEY_EV_KBD_COVER_ATTACH	= 0x4012, /* keyboard cover attached */
193 	TP_HKEY_EV_KBD_COVER_DETACH	= 0x4013, /* keyboard cover detached or folded back */
194 
195 	/* User-interface events */
196 	TP_HKEY_EV_LID_CLOSE		= 0x5001, /* laptop lid closed */
197 	TP_HKEY_EV_LID_OPEN		= 0x5002, /* laptop lid opened */
198 	TP_HKEY_EV_TABLET_TABLET	= 0x5009, /* tablet swivel up */
199 	TP_HKEY_EV_TABLET_NOTEBOOK	= 0x500a, /* tablet swivel down */
200 	TP_HKEY_EV_TABLET_CHANGED	= 0x60c0, /* X1 Yoga (2016):
201 						   * enter/leave tablet mode
202 						   */
203 	TP_HKEY_EV_PEN_INSERTED		= 0x500b, /* tablet pen inserted */
204 	TP_HKEY_EV_PEN_REMOVED		= 0x500c, /* tablet pen removed */
205 	TP_HKEY_EV_BRGHT_CHANGED	= 0x5010, /* backlight control event */
206 
207 	/* Key-related user-interface events */
208 	TP_HKEY_EV_KEY_NUMLOCK		= 0x6000, /* NumLock key pressed */
209 	TP_HKEY_EV_KEY_FN		= 0x6005, /* Fn key pressed? E420 */
210 	TP_HKEY_EV_KEY_FN_ESC           = 0x6060, /* Fn+Esc key pressed X240 */
211 
212 	/* Thermal events */
213 	TP_HKEY_EV_ALARM_BAT_HOT	= 0x6011, /* battery too hot */
214 	TP_HKEY_EV_ALARM_BAT_XHOT	= 0x6012, /* battery critically hot */
215 	TP_HKEY_EV_ALARM_SENSOR_HOT	= 0x6021, /* sensor too hot */
216 	TP_HKEY_EV_ALARM_SENSOR_XHOT	= 0x6022, /* sensor critically hot */
217 	TP_HKEY_EV_THM_TABLE_CHANGED	= 0x6030, /* windows; thermal table changed */
218 	TP_HKEY_EV_THM_CSM_COMPLETED    = 0x6032, /* windows; thermal control set
219 						   * command completed. Related to
220 						   * AML DYTC */
221 	TP_HKEY_EV_THM_TRANSFM_CHANGED  = 0x60F0, /* windows; thermal transformation
222 						   * changed. Related to AML GMTS */
223 
224 	/* AC-related events */
225 	TP_HKEY_EV_AC_CHANGED		= 0x6040, /* AC status changed */
226 
227 	/* Further user-interface events */
228 	TP_HKEY_EV_PALM_DETECTED	= 0x60b0, /* palm hoveres keyboard */
229 	TP_HKEY_EV_PALM_UNDETECTED	= 0x60b1, /* palm removed */
230 
231 	/* Misc */
232 	TP_HKEY_EV_RFKILL_CHANGED	= 0x7000, /* rfkill switch changed */
233 };
234 
235 /****************************************************************************
236  * Main driver
237  */
238 
239 #define TPACPI_NAME "thinkpad"
240 #define TPACPI_DESC "ThinkPad ACPI Extras"
241 #define TPACPI_FILE TPACPI_NAME "_acpi"
242 #define TPACPI_URL "http://ibm-acpi.sf.net/"
243 #define TPACPI_MAIL "ibm-acpi-devel@lists.sourceforge.net"
244 
245 #define TPACPI_PROC_DIR "ibm"
246 #define TPACPI_ACPI_EVENT_PREFIX "ibm"
247 #define TPACPI_DRVR_NAME TPACPI_FILE
248 #define TPACPI_DRVR_SHORTNAME "tpacpi"
249 #define TPACPI_HWMON_DRVR_NAME TPACPI_NAME "_hwmon"
250 
251 #define TPACPI_NVRAM_KTHREAD_NAME "ktpacpi_nvramd"
252 #define TPACPI_WORKQUEUE_NAME "ktpacpid"
253 
254 #define TPACPI_MAX_ACPI_ARGS 3
255 
256 /* Debugging printk groups */
257 #define TPACPI_DBG_ALL		0xffff
258 #define TPACPI_DBG_DISCLOSETASK	0x8000
259 #define TPACPI_DBG_INIT		0x0001
260 #define TPACPI_DBG_EXIT		0x0002
261 #define TPACPI_DBG_RFKILL	0x0004
262 #define TPACPI_DBG_HKEY		0x0008
263 #define TPACPI_DBG_FAN		0x0010
264 #define TPACPI_DBG_BRGHT	0x0020
265 #define TPACPI_DBG_MIXER	0x0040
266 
267 #define FAN_NOT_PRESENT		65535
268 
269 /****************************************************************************
270  * Driver-wide structs and misc. variables
271  */
272 
273 struct ibm_struct;
274 
275 struct tp_acpi_drv_struct {
276 	const struct acpi_device_id *hid;
277 	struct acpi_driver *driver;
278 
279 	void (*notify) (struct ibm_struct *, u32);
280 	acpi_handle *handle;
281 	u32 type;
282 	struct acpi_device *device;
283 };
284 
285 struct ibm_struct {
286 	char *name;
287 
288 	int (*read) (struct seq_file *);
289 	int (*write) (char *);
290 	void (*exit) (void);
291 	void (*resume) (void);
292 	void (*suspend) (void);
293 	void (*shutdown) (void);
294 
295 	struct list_head all_drivers;
296 
297 	struct tp_acpi_drv_struct *acpi;
298 
299 	struct {
300 		u8 acpi_driver_registered:1;
301 		u8 acpi_notify_installed:1;
302 		u8 proc_created:1;
303 		u8 init_called:1;
304 		u8 experimental:1;
305 	} flags;
306 };
307 
308 struct ibm_init_struct {
309 	char param[32];
310 
311 	int (*init) (struct ibm_init_struct *);
312 	umode_t base_procfs_mode;
313 	struct ibm_struct *data;
314 };
315 
316 /* DMI Quirks */
317 struct quirk_entry {
318 	bool btusb_bug;
319 };
320 
321 static struct quirk_entry quirk_btusb_bug = {
322 	.btusb_bug = true,
323 };
324 
325 static struct {
326 	u32 bluetooth:1;
327 	u32 hotkey:1;
328 	u32 hotkey_mask:1;
329 	u32 hotkey_wlsw:1;
330 	enum {
331 		TP_HOTKEY_TABLET_NONE = 0,
332 		TP_HOTKEY_TABLET_USES_MHKG,
333 		TP_HOTKEY_TABLET_USES_GMMS,
334 	} hotkey_tablet;
335 	u32 kbdlight:1;
336 	u32 light:1;
337 	u32 light_status:1;
338 	u32 bright_acpimode:1;
339 	u32 bright_unkfw:1;
340 	u32 wan:1;
341 	u32 uwb:1;
342 	u32 fan_ctrl_status_undef:1;
343 	u32 second_fan:1;
344 	u32 second_fan_ctl:1;
345 	u32 beep_needs_two_args:1;
346 	u32 mixer_no_level_control:1;
347 	u32 battery_force_primary:1;
348 	u32 input_device_registered:1;
349 	u32 platform_drv_registered:1;
350 	u32 sensors_pdrv_registered:1;
351 	u32 hotkey_poll_active:1;
352 	u32 has_adaptive_kbd:1;
353 	u32 kbd_lang:1;
354 	struct quirk_entry *quirks;
355 } tp_features;
356 
357 static struct {
358 	u16 hotkey_mask_ff:1;
359 	u16 volume_ctrl_forbidden:1;
360 } tp_warned;
361 
362 struct thinkpad_id_data {
363 	unsigned int vendor;	/* ThinkPad vendor:
364 				 * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */
365 
366 	char *bios_version_str;	/* Something like 1ZET51WW (1.03z) */
367 	char *ec_version_str;	/* Something like 1ZHT51WW-1.04a */
368 
369 	u32 bios_model;		/* 1Y = 0x3159, 0 = unknown */
370 	u32 ec_model;
371 	u16 bios_release;	/* 1ZETK1WW = 0x4b31, 0 = unknown */
372 	u16 ec_release;
373 
374 	char *model_str;	/* ThinkPad T43 */
375 	char *nummodel_str;	/* 9384A9C for a 9384-A9C model */
376 };
377 static struct thinkpad_id_data thinkpad_id;
378 
379 static enum {
380 	TPACPI_LIFE_INIT = 0,
381 	TPACPI_LIFE_RUNNING,
382 	TPACPI_LIFE_EXITING,
383 } tpacpi_lifecycle;
384 
385 static int experimental;
386 static u32 dbg_level;
387 
388 static struct workqueue_struct *tpacpi_wq;
389 
390 enum led_status_t {
391 	TPACPI_LED_OFF = 0,
392 	TPACPI_LED_ON,
393 	TPACPI_LED_BLINK,
394 };
395 
396 /* tpacpi LED class */
397 struct tpacpi_led_classdev {
398 	struct led_classdev led_classdev;
399 	int led;
400 };
401 
402 /* brightness level capabilities */
403 static unsigned int bright_maxlvl;	/* 0 = unknown */
404 
405 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
406 static int dbg_wlswemul;
407 static bool tpacpi_wlsw_emulstate;
408 static int dbg_bluetoothemul;
409 static bool tpacpi_bluetooth_emulstate;
410 static int dbg_wwanemul;
411 static bool tpacpi_wwan_emulstate;
412 static int dbg_uwbemul;
413 static bool tpacpi_uwb_emulstate;
414 #endif
415 
416 
417 /*************************************************************************
418  *  Debugging helpers
419  */
420 
421 #define dbg_printk(a_dbg_level, format, arg...)				\
422 do {									\
423 	if (dbg_level & (a_dbg_level))					\
424 		printk(KERN_DEBUG pr_fmt("%s: " format),		\
425 		       __func__, ##arg);				\
426 } while (0)
427 
428 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
429 #define vdbg_printk dbg_printk
430 static const char *str_supported(int is_supported);
431 #else
432 static inline const char *str_supported(int is_supported) { return ""; }
433 #define vdbg_printk(a_dbg_level, format, arg...)	\
434 	do { if (0) no_printk(format, ##arg); } while (0)
435 #endif
436 
437 static void tpacpi_log_usertask(const char * const what)
438 {
439 	printk(KERN_DEBUG pr_fmt("%s: access by process with PID %d\n"),
440 	       what, task_tgid_vnr(current));
441 }
442 
443 #define tpacpi_disclose_usertask(what, format, arg...)			\
444 do {									\
445 	if (unlikely((dbg_level & TPACPI_DBG_DISCLOSETASK) &&		\
446 		     (tpacpi_lifecycle == TPACPI_LIFE_RUNNING))) {	\
447 		printk(KERN_DEBUG pr_fmt("%s: PID %d: " format),	\
448 		       what, task_tgid_vnr(current), ## arg);		\
449 	}								\
450 } while (0)
451 
452 /*
453  * Quirk handling helpers
454  *
455  * ThinkPad IDs and versions seen in the field so far are
456  * two or three characters from the set [0-9A-Z], i.e. base 36.
457  *
458  * We use values well outside that range as specials.
459  */
460 
461 #define TPACPI_MATCH_ANY		0xffffffffU
462 #define TPACPI_MATCH_ANY_VERSION	0xffffU
463 #define TPACPI_MATCH_UNKNOWN		0U
464 
465 /* TPID('1', 'Y') == 0x3159 */
466 #define TPID(__c1, __c2)	(((__c1) << 8) | (__c2))
467 #define TPID3(__c1, __c2, __c3)	(((__c1) << 16) | ((__c2) << 8) | (__c3))
468 #define TPVER TPID
469 
470 #define TPACPI_Q_IBM(__id1, __id2, __quirk)	\
471 	{ .vendor = PCI_VENDOR_ID_IBM,		\
472 	  .bios = TPID(__id1, __id2),		\
473 	  .ec = TPACPI_MATCH_ANY,		\
474 	  .quirks = (__quirk) }
475 
476 #define TPACPI_Q_LNV(__id1, __id2, __quirk)	\
477 	{ .vendor = PCI_VENDOR_ID_LENOVO,	\
478 	  .bios = TPID(__id1, __id2),		\
479 	  .ec = TPACPI_MATCH_ANY,		\
480 	  .quirks = (__quirk) }
481 
482 #define TPACPI_Q_LNV3(__id1, __id2, __id3, __quirk) \
483 	{ .vendor = PCI_VENDOR_ID_LENOVO,	\
484 	  .bios = TPID3(__id1, __id2, __id3),	\
485 	  .ec = TPACPI_MATCH_ANY,		\
486 	  .quirks = (__quirk) }
487 
488 #define TPACPI_QEC_IBM(__id1, __id2, __quirk)	\
489 	{ .vendor = PCI_VENDOR_ID_IBM,		\
490 	  .bios = TPACPI_MATCH_ANY,		\
491 	  .ec = TPID(__id1, __id2),		\
492 	  .quirks = (__quirk) }
493 
494 #define TPACPI_QEC_LNV(__id1, __id2, __quirk)	\
495 	{ .vendor = PCI_VENDOR_ID_LENOVO,	\
496 	  .bios = TPACPI_MATCH_ANY,		\
497 	  .ec = TPID(__id1, __id2),		\
498 	  .quirks = (__quirk) }
499 
500 struct tpacpi_quirk {
501 	unsigned int vendor;
502 	u32 bios;
503 	u32 ec;
504 	unsigned long quirks;
505 };
506 
507 /**
508  * tpacpi_check_quirks() - search BIOS/EC version on a list
509  * @qlist:		array of &struct tpacpi_quirk
510  * @qlist_size:		number of elements in @qlist
511  *
512  * Iterates over a quirks list until one is found that matches the
513  * ThinkPad's vendor, BIOS and EC model.
514  *
515  * Returns 0 if nothing matches, otherwise returns the quirks field of
516  * the matching &struct tpacpi_quirk entry.
517  *
518  * The match criteria is: vendor, ec and bios much match.
519  */
520 static unsigned long __init tpacpi_check_quirks(
521 			const struct tpacpi_quirk *qlist,
522 			unsigned int qlist_size)
523 {
524 	while (qlist_size) {
525 		if ((qlist->vendor == thinkpad_id.vendor ||
526 				qlist->vendor == TPACPI_MATCH_ANY) &&
527 		    (qlist->bios == thinkpad_id.bios_model ||
528 				qlist->bios == TPACPI_MATCH_ANY) &&
529 		    (qlist->ec == thinkpad_id.ec_model ||
530 				qlist->ec == TPACPI_MATCH_ANY))
531 			return qlist->quirks;
532 
533 		qlist_size--;
534 		qlist++;
535 	}
536 	return 0;
537 }
538 
539 static inline bool __pure __init tpacpi_is_lenovo(void)
540 {
541 	return thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO;
542 }
543 
544 static inline bool __pure __init tpacpi_is_ibm(void)
545 {
546 	return thinkpad_id.vendor == PCI_VENDOR_ID_IBM;
547 }
548 
549 /****************************************************************************
550  ****************************************************************************
551  *
552  * ACPI Helpers and device model
553  *
554  ****************************************************************************
555  ****************************************************************************/
556 
557 /*************************************************************************
558  * ACPI basic handles
559  */
560 
561 static acpi_handle root_handle;
562 static acpi_handle ec_handle;
563 
564 #define TPACPI_HANDLE(object, parent, paths...)			\
565 	static acpi_handle  object##_handle;			\
566 	static const acpi_handle * const object##_parent __initconst =	\
567 						&parent##_handle; \
568 	static char *object##_paths[] __initdata = { paths }
569 
570 TPACPI_HANDLE(ecrd, ec, "ECRD");	/* 570 */
571 TPACPI_HANDLE(ecwr, ec, "ECWR");	/* 570 */
572 
573 TPACPI_HANDLE(cmos, root, "\\UCMS",	/* R50, R50e, R50p, R51, */
574 					/* T4x, X31, X40 */
575 	   "\\CMOS",		/* A3x, G4x, R32, T23, T30, X22-24, X30 */
576 	   "\\CMS",		/* R40, R40e */
577 	   );			/* all others */
578 
579 TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY",	/* 600e/x, 770e, 770x */
580 	   "^HKEY",		/* R30, R31 */
581 	   "HKEY",		/* all others */
582 	   );			/* 570 */
583 
584 /*************************************************************************
585  * ACPI helpers
586  */
587 
588 static int acpi_evalf(acpi_handle handle,
589 		      int *res, char *method, char *fmt, ...)
590 {
591 	char *fmt0 = fmt;
592 	struct acpi_object_list params;
593 	union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS];
594 	struct acpi_buffer result, *resultp;
595 	union acpi_object out_obj;
596 	acpi_status status;
597 	va_list ap;
598 	char res_type;
599 	int success;
600 	int quiet;
601 
602 	if (!*fmt) {
603 		pr_err("acpi_evalf() called with empty format\n");
604 		return 0;
605 	}
606 
607 	if (*fmt == 'q') {
608 		quiet = 1;
609 		fmt++;
610 	} else
611 		quiet = 0;
612 
613 	res_type = *(fmt++);
614 
615 	params.count = 0;
616 	params.pointer = &in_objs[0];
617 
618 	va_start(ap, fmt);
619 	while (*fmt) {
620 		char c = *(fmt++);
621 		switch (c) {
622 		case 'd':	/* int */
623 			in_objs[params.count].integer.value = va_arg(ap, int);
624 			in_objs[params.count++].type = ACPI_TYPE_INTEGER;
625 			break;
626 			/* add more types as needed */
627 		default:
628 			pr_err("acpi_evalf() called with invalid format character '%c'\n",
629 			       c);
630 			va_end(ap);
631 			return 0;
632 		}
633 	}
634 	va_end(ap);
635 
636 	if (res_type != 'v') {
637 		result.length = sizeof(out_obj);
638 		result.pointer = &out_obj;
639 		resultp = &result;
640 	} else
641 		resultp = NULL;
642 
643 	status = acpi_evaluate_object(handle, method, &params, resultp);
644 
645 	switch (res_type) {
646 	case 'd':		/* int */
647 		success = (status == AE_OK &&
648 			   out_obj.type == ACPI_TYPE_INTEGER);
649 		if (success && res)
650 			*res = out_obj.integer.value;
651 		break;
652 	case 'v':		/* void */
653 		success = status == AE_OK;
654 		break;
655 		/* add more types as needed */
656 	default:
657 		pr_err("acpi_evalf() called with invalid format character '%c'\n",
658 		       res_type);
659 		return 0;
660 	}
661 
662 	if (!success && !quiet)
663 		pr_err("acpi_evalf(%s, %s, ...) failed: %s\n",
664 		       method, fmt0, acpi_format_exception(status));
665 
666 	return success;
667 }
668 
669 static int acpi_ec_read(int i, u8 *p)
670 {
671 	int v;
672 
673 	if (ecrd_handle) {
674 		if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
675 			return 0;
676 		*p = v;
677 	} else {
678 		if (ec_read(i, p) < 0)
679 			return 0;
680 	}
681 
682 	return 1;
683 }
684 
685 static int acpi_ec_write(int i, u8 v)
686 {
687 	if (ecwr_handle) {
688 		if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
689 			return 0;
690 	} else {
691 		if (ec_write(i, v) < 0)
692 			return 0;
693 	}
694 
695 	return 1;
696 }
697 
698 static int issue_thinkpad_cmos_command(int cmos_cmd)
699 {
700 	if (!cmos_handle)
701 		return -ENXIO;
702 
703 	if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
704 		return -EIO;
705 
706 	return 0;
707 }
708 
709 /*************************************************************************
710  * ACPI device model
711  */
712 
713 #define TPACPI_ACPIHANDLE_INIT(object) \
714 	drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \
715 		object##_paths, ARRAY_SIZE(object##_paths))
716 
717 static void __init drv_acpi_handle_init(const char *name,
718 			   acpi_handle *handle, const acpi_handle parent,
719 			   char **paths, const int num_paths)
720 {
721 	int i;
722 	acpi_status status;
723 
724 	vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n",
725 		name);
726 
727 	for (i = 0; i < num_paths; i++) {
728 		status = acpi_get_handle(parent, paths[i], handle);
729 		if (ACPI_SUCCESS(status)) {
730 			dbg_printk(TPACPI_DBG_INIT,
731 				   "Found ACPI handle %s for %s\n",
732 				   paths[i], name);
733 			return;
734 		}
735 	}
736 
737 	vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n",
738 		    name);
739 	*handle = NULL;
740 }
741 
742 static acpi_status __init tpacpi_acpi_handle_locate_callback(acpi_handle handle,
743 			u32 level, void *context, void **return_value)
744 {
745 	if (!strcmp(context, "video")) {
746 		struct acpi_device *dev = acpi_fetch_acpi_dev(handle);
747 
748 		if (!dev || strcmp(ACPI_VIDEO_HID, acpi_device_hid(dev)))
749 			return AE_OK;
750 	}
751 
752 	*(acpi_handle *)return_value = handle;
753 
754 	return AE_CTRL_TERMINATE;
755 }
756 
757 static void __init tpacpi_acpi_handle_locate(const char *name,
758 		const char *hid,
759 		acpi_handle *handle)
760 {
761 	acpi_status status;
762 	acpi_handle device_found;
763 
764 	BUG_ON(!name || !handle);
765 	vdbg_printk(TPACPI_DBG_INIT,
766 			"trying to locate ACPI handle for %s, using HID %s\n",
767 			name, hid ? hid : "NULL");
768 
769 	memset(&device_found, 0, sizeof(device_found));
770 	status = acpi_get_devices(hid, tpacpi_acpi_handle_locate_callback,
771 				  (void *)name, &device_found);
772 
773 	*handle = NULL;
774 
775 	if (ACPI_SUCCESS(status)) {
776 		*handle = device_found;
777 		dbg_printk(TPACPI_DBG_INIT,
778 			   "Found ACPI handle for %s\n", name);
779 	} else {
780 		vdbg_printk(TPACPI_DBG_INIT,
781 			    "Could not locate an ACPI handle for %s: %s\n",
782 			    name, acpi_format_exception(status));
783 	}
784 }
785 
786 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
787 {
788 	struct ibm_struct *ibm = data;
789 
790 	if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
791 		return;
792 
793 	if (!ibm || !ibm->acpi || !ibm->acpi->notify)
794 		return;
795 
796 	ibm->acpi->notify(ibm, event);
797 }
798 
799 static int __init setup_acpi_notify(struct ibm_struct *ibm)
800 {
801 	acpi_status status;
802 
803 	BUG_ON(!ibm->acpi);
804 
805 	if (!*ibm->acpi->handle)
806 		return 0;
807 
808 	vdbg_printk(TPACPI_DBG_INIT,
809 		"setting up ACPI notify for %s\n", ibm->name);
810 
811 	ibm->acpi->device = acpi_fetch_acpi_dev(*ibm->acpi->handle);
812 	if (!ibm->acpi->device) {
813 		pr_err("acpi_fetch_acpi_dev(%s) failed\n", ibm->name);
814 		return -ENODEV;
815 	}
816 
817 	ibm->acpi->device->driver_data = ibm;
818 	sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
819 		TPACPI_ACPI_EVENT_PREFIX,
820 		ibm->name);
821 
822 	status = acpi_install_notify_handler(*ibm->acpi->handle,
823 			ibm->acpi->type, dispatch_acpi_notify, ibm);
824 	if (ACPI_FAILURE(status)) {
825 		if (status == AE_ALREADY_EXISTS) {
826 			pr_notice("another device driver is already handling %s events\n",
827 				  ibm->name);
828 		} else {
829 			pr_err("acpi_install_notify_handler(%s) failed: %s\n",
830 			       ibm->name, acpi_format_exception(status));
831 		}
832 		return -ENODEV;
833 	}
834 	ibm->flags.acpi_notify_installed = 1;
835 	return 0;
836 }
837 
838 static int __init tpacpi_device_add(struct acpi_device *device)
839 {
840 	return 0;
841 }
842 
843 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
844 {
845 	int rc;
846 
847 	dbg_printk(TPACPI_DBG_INIT,
848 		"registering %s as an ACPI driver\n", ibm->name);
849 
850 	BUG_ON(!ibm->acpi);
851 
852 	ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
853 	if (!ibm->acpi->driver) {
854 		pr_err("failed to allocate memory for ibm->acpi->driver\n");
855 		return -ENOMEM;
856 	}
857 
858 	sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name);
859 	ibm->acpi->driver->ids = ibm->acpi->hid;
860 
861 	ibm->acpi->driver->ops.add = &tpacpi_device_add;
862 
863 	rc = acpi_bus_register_driver(ibm->acpi->driver);
864 	if (rc < 0) {
865 		pr_err("acpi_bus_register_driver(%s) failed: %d\n",
866 		       ibm->name, rc);
867 		kfree(ibm->acpi->driver);
868 		ibm->acpi->driver = NULL;
869 	} else if (!rc)
870 		ibm->flags.acpi_driver_registered = 1;
871 
872 	return rc;
873 }
874 
875 
876 /****************************************************************************
877  ****************************************************************************
878  *
879  * Procfs Helpers
880  *
881  ****************************************************************************
882  ****************************************************************************/
883 
884 static int dispatch_proc_show(struct seq_file *m, void *v)
885 {
886 	struct ibm_struct *ibm = m->private;
887 
888 	if (!ibm || !ibm->read)
889 		return -EINVAL;
890 	return ibm->read(m);
891 }
892 
893 static int dispatch_proc_open(struct inode *inode, struct file *file)
894 {
895 	return single_open(file, dispatch_proc_show, pde_data(inode));
896 }
897 
898 static ssize_t dispatch_proc_write(struct file *file,
899 			const char __user *userbuf,
900 			size_t count, loff_t *pos)
901 {
902 	struct ibm_struct *ibm = pde_data(file_inode(file));
903 	char *kernbuf;
904 	int ret;
905 
906 	if (!ibm || !ibm->write)
907 		return -EINVAL;
908 	if (count > PAGE_SIZE - 1)
909 		return -EINVAL;
910 
911 	kernbuf = memdup_user_nul(userbuf, count);
912 	if (IS_ERR(kernbuf))
913 		return PTR_ERR(kernbuf);
914 	ret = ibm->write(kernbuf);
915 	if (ret == 0)
916 		ret = count;
917 
918 	kfree(kernbuf);
919 
920 	return ret;
921 }
922 
923 static const struct proc_ops dispatch_proc_ops = {
924 	.proc_open	= dispatch_proc_open,
925 	.proc_read	= seq_read,
926 	.proc_lseek	= seq_lseek,
927 	.proc_release	= single_release,
928 	.proc_write	= dispatch_proc_write,
929 };
930 
931 /****************************************************************************
932  ****************************************************************************
933  *
934  * Device model: input, hwmon and platform
935  *
936  ****************************************************************************
937  ****************************************************************************/
938 
939 static struct platform_device *tpacpi_pdev;
940 static struct platform_device *tpacpi_sensors_pdev;
941 static struct device *tpacpi_hwmon;
942 static struct input_dev *tpacpi_inputdev;
943 static struct mutex tpacpi_inputdev_send_mutex;
944 static LIST_HEAD(tpacpi_all_drivers);
945 
946 #ifdef CONFIG_PM_SLEEP
947 static int tpacpi_suspend_handler(struct device *dev)
948 {
949 	struct ibm_struct *ibm, *itmp;
950 
951 	list_for_each_entry_safe(ibm, itmp,
952 				 &tpacpi_all_drivers,
953 				 all_drivers) {
954 		if (ibm->suspend)
955 			(ibm->suspend)();
956 	}
957 
958 	return 0;
959 }
960 
961 static int tpacpi_resume_handler(struct device *dev)
962 {
963 	struct ibm_struct *ibm, *itmp;
964 
965 	list_for_each_entry_safe(ibm, itmp,
966 				 &tpacpi_all_drivers,
967 				 all_drivers) {
968 		if (ibm->resume)
969 			(ibm->resume)();
970 	}
971 
972 	return 0;
973 }
974 #endif
975 
976 static SIMPLE_DEV_PM_OPS(tpacpi_pm,
977 			 tpacpi_suspend_handler, tpacpi_resume_handler);
978 
979 static void tpacpi_shutdown_handler(struct platform_device *pdev)
980 {
981 	struct ibm_struct *ibm, *itmp;
982 
983 	list_for_each_entry_safe(ibm, itmp,
984 				 &tpacpi_all_drivers,
985 				 all_drivers) {
986 		if (ibm->shutdown)
987 			(ibm->shutdown)();
988 	}
989 }
990 
991 /*************************************************************************
992  * sysfs support helpers
993  */
994 
995 static int parse_strtoul(const char *buf,
996 		unsigned long max, unsigned long *value)
997 {
998 	char *endp;
999 
1000 	*value = simple_strtoul(skip_spaces(buf), &endp, 0);
1001 	endp = skip_spaces(endp);
1002 	if (*endp || *value > max)
1003 		return -EINVAL;
1004 
1005 	return 0;
1006 }
1007 
1008 static void tpacpi_disable_brightness_delay(void)
1009 {
1010 	if (acpi_evalf(hkey_handle, NULL, "PWMS", "qvd", 0))
1011 		pr_notice("ACPI backlight control delay disabled\n");
1012 }
1013 
1014 static void printk_deprecated_attribute(const char * const what,
1015 					const char * const details)
1016 {
1017 	tpacpi_log_usertask("deprecated sysfs attribute");
1018 	pr_warn("WARNING: sysfs attribute %s is deprecated and will be removed. %s\n",
1019 		what, details);
1020 }
1021 
1022 /*************************************************************************
1023  * rfkill and radio control support helpers
1024  */
1025 
1026 /*
1027  * ThinkPad-ACPI firmware handling model:
1028  *
1029  * WLSW (master wireless switch) is event-driven, and is common to all
1030  * firmware-controlled radios.  It cannot be controlled, just monitored,
1031  * as expected.  It overrides all radio state in firmware
1032  *
1033  * The kernel, a masked-off hotkey, and WLSW can change the radio state
1034  * (TODO: verify how WLSW interacts with the returned radio state).
1035  *
1036  * The only time there are shadow radio state changes, is when
1037  * masked-off hotkeys are used.
1038  */
1039 
1040 /*
1041  * Internal driver API for radio state:
1042  *
1043  * int: < 0 = error, otherwise enum tpacpi_rfkill_state
1044  * bool: true means radio blocked (off)
1045  */
1046 enum tpacpi_rfkill_state {
1047 	TPACPI_RFK_RADIO_OFF = 0,
1048 	TPACPI_RFK_RADIO_ON
1049 };
1050 
1051 /* rfkill switches */
1052 enum tpacpi_rfk_id {
1053 	TPACPI_RFK_BLUETOOTH_SW_ID = 0,
1054 	TPACPI_RFK_WWAN_SW_ID,
1055 	TPACPI_RFK_UWB_SW_ID,
1056 	TPACPI_RFK_SW_MAX
1057 };
1058 
1059 static const char *tpacpi_rfkill_names[] = {
1060 	[TPACPI_RFK_BLUETOOTH_SW_ID] = "bluetooth",
1061 	[TPACPI_RFK_WWAN_SW_ID] = "wwan",
1062 	[TPACPI_RFK_UWB_SW_ID] = "uwb",
1063 	[TPACPI_RFK_SW_MAX] = NULL
1064 };
1065 
1066 /* ThinkPad-ACPI rfkill subdriver */
1067 struct tpacpi_rfk {
1068 	struct rfkill *rfkill;
1069 	enum tpacpi_rfk_id id;
1070 	const struct tpacpi_rfk_ops *ops;
1071 };
1072 
1073 struct tpacpi_rfk_ops {
1074 	/* firmware interface */
1075 	int (*get_status)(void);
1076 	int (*set_status)(const enum tpacpi_rfkill_state);
1077 };
1078 
1079 static struct tpacpi_rfk *tpacpi_rfkill_switches[TPACPI_RFK_SW_MAX];
1080 
1081 /* Query FW and update rfkill sw state for a given rfkill switch */
1082 static int tpacpi_rfk_update_swstate(const struct tpacpi_rfk *tp_rfk)
1083 {
1084 	int status;
1085 
1086 	if (!tp_rfk)
1087 		return -ENODEV;
1088 
1089 	status = (tp_rfk->ops->get_status)();
1090 	if (status < 0)
1091 		return status;
1092 
1093 	rfkill_set_sw_state(tp_rfk->rfkill,
1094 			    (status == TPACPI_RFK_RADIO_OFF));
1095 
1096 	return status;
1097 }
1098 
1099 /*
1100  * Sync the HW-blocking state of all rfkill switches,
1101  * do notice it causes the rfkill core to schedule uevents
1102  */
1103 static void tpacpi_rfk_update_hwblock_state(bool blocked)
1104 {
1105 	unsigned int i;
1106 	struct tpacpi_rfk *tp_rfk;
1107 
1108 	for (i = 0; i < TPACPI_RFK_SW_MAX; i++) {
1109 		tp_rfk = tpacpi_rfkill_switches[i];
1110 		if (tp_rfk) {
1111 			if (rfkill_set_hw_state(tp_rfk->rfkill,
1112 						blocked)) {
1113 				/* ignore -- we track sw block */
1114 			}
1115 		}
1116 	}
1117 }
1118 
1119 /* Call to get the WLSW state from the firmware */
1120 static int hotkey_get_wlsw(void);
1121 
1122 /* Call to query WLSW state and update all rfkill switches */
1123 static bool tpacpi_rfk_check_hwblock_state(void)
1124 {
1125 	int res = hotkey_get_wlsw();
1126 	int hw_blocked;
1127 
1128 	/* When unknown or unsupported, we have to assume it is unblocked */
1129 	if (res < 0)
1130 		return false;
1131 
1132 	hw_blocked = (res == TPACPI_RFK_RADIO_OFF);
1133 	tpacpi_rfk_update_hwblock_state(hw_blocked);
1134 
1135 	return hw_blocked;
1136 }
1137 
1138 static int tpacpi_rfk_hook_set_block(void *data, bool blocked)
1139 {
1140 	struct tpacpi_rfk *tp_rfk = data;
1141 	int res;
1142 
1143 	dbg_printk(TPACPI_DBG_RFKILL,
1144 		   "request to change radio state to %s\n",
1145 		   blocked ? "blocked" : "unblocked");
1146 
1147 	/* try to set radio state */
1148 	res = (tp_rfk->ops->set_status)(blocked ?
1149 				TPACPI_RFK_RADIO_OFF : TPACPI_RFK_RADIO_ON);
1150 
1151 	/* and update the rfkill core with whatever the FW really did */
1152 	tpacpi_rfk_update_swstate(tp_rfk);
1153 
1154 	return (res < 0) ? res : 0;
1155 }
1156 
1157 static const struct rfkill_ops tpacpi_rfk_rfkill_ops = {
1158 	.set_block = tpacpi_rfk_hook_set_block,
1159 };
1160 
1161 static int __init tpacpi_new_rfkill(const enum tpacpi_rfk_id id,
1162 			const struct tpacpi_rfk_ops *tp_rfkops,
1163 			const enum rfkill_type rfktype,
1164 			const char *name,
1165 			const bool set_default)
1166 {
1167 	struct tpacpi_rfk *atp_rfk;
1168 	int res;
1169 	bool sw_state = false;
1170 	bool hw_state;
1171 	int sw_status;
1172 
1173 	BUG_ON(id >= TPACPI_RFK_SW_MAX || tpacpi_rfkill_switches[id]);
1174 
1175 	atp_rfk = kzalloc(sizeof(struct tpacpi_rfk), GFP_KERNEL);
1176 	if (atp_rfk)
1177 		atp_rfk->rfkill = rfkill_alloc(name,
1178 						&tpacpi_pdev->dev,
1179 						rfktype,
1180 						&tpacpi_rfk_rfkill_ops,
1181 						atp_rfk);
1182 	if (!atp_rfk || !atp_rfk->rfkill) {
1183 		pr_err("failed to allocate memory for rfkill class\n");
1184 		kfree(atp_rfk);
1185 		return -ENOMEM;
1186 	}
1187 
1188 	atp_rfk->id = id;
1189 	atp_rfk->ops = tp_rfkops;
1190 
1191 	sw_status = (tp_rfkops->get_status)();
1192 	if (sw_status < 0) {
1193 		pr_err("failed to read initial state for %s, error %d\n",
1194 		       name, sw_status);
1195 	} else {
1196 		sw_state = (sw_status == TPACPI_RFK_RADIO_OFF);
1197 		if (set_default) {
1198 			/* try to keep the initial state, since we ask the
1199 			 * firmware to preserve it across S5 in NVRAM */
1200 			rfkill_init_sw_state(atp_rfk->rfkill, sw_state);
1201 		}
1202 	}
1203 	hw_state = tpacpi_rfk_check_hwblock_state();
1204 	rfkill_set_hw_state(atp_rfk->rfkill, hw_state);
1205 
1206 	res = rfkill_register(atp_rfk->rfkill);
1207 	if (res < 0) {
1208 		pr_err("failed to register %s rfkill switch: %d\n", name, res);
1209 		rfkill_destroy(atp_rfk->rfkill);
1210 		kfree(atp_rfk);
1211 		return res;
1212 	}
1213 
1214 	tpacpi_rfkill_switches[id] = atp_rfk;
1215 
1216 	pr_info("rfkill switch %s: radio is %sblocked\n",
1217 		name, (sw_state || hw_state) ? "" : "un");
1218 	return 0;
1219 }
1220 
1221 static void tpacpi_destroy_rfkill(const enum tpacpi_rfk_id id)
1222 {
1223 	struct tpacpi_rfk *tp_rfk;
1224 
1225 	BUG_ON(id >= TPACPI_RFK_SW_MAX);
1226 
1227 	tp_rfk = tpacpi_rfkill_switches[id];
1228 	if (tp_rfk) {
1229 		rfkill_unregister(tp_rfk->rfkill);
1230 		rfkill_destroy(tp_rfk->rfkill);
1231 		tpacpi_rfkill_switches[id] = NULL;
1232 		kfree(tp_rfk);
1233 	}
1234 }
1235 
1236 static void printk_deprecated_rfkill_attribute(const char * const what)
1237 {
1238 	printk_deprecated_attribute(what,
1239 			"Please switch to generic rfkill before year 2010");
1240 }
1241 
1242 /* sysfs <radio> enable ------------------------------------------------ */
1243 static ssize_t tpacpi_rfk_sysfs_enable_show(const enum tpacpi_rfk_id id,
1244 					    struct device_attribute *attr,
1245 					    char *buf)
1246 {
1247 	int status;
1248 
1249 	printk_deprecated_rfkill_attribute(attr->attr.name);
1250 
1251 	/* This is in the ABI... */
1252 	if (tpacpi_rfk_check_hwblock_state()) {
1253 		status = TPACPI_RFK_RADIO_OFF;
1254 	} else {
1255 		status = tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1256 		if (status < 0)
1257 			return status;
1258 	}
1259 
1260 	return sysfs_emit(buf, "%d\n",
1261 			(status == TPACPI_RFK_RADIO_ON) ? 1 : 0);
1262 }
1263 
1264 static ssize_t tpacpi_rfk_sysfs_enable_store(const enum tpacpi_rfk_id id,
1265 			    struct device_attribute *attr,
1266 			    const char *buf, size_t count)
1267 {
1268 	unsigned long t;
1269 	int res;
1270 
1271 	printk_deprecated_rfkill_attribute(attr->attr.name);
1272 
1273 	if (parse_strtoul(buf, 1, &t))
1274 		return -EINVAL;
1275 
1276 	tpacpi_disclose_usertask(attr->attr.name, "set to %ld\n", t);
1277 
1278 	/* This is in the ABI... */
1279 	if (tpacpi_rfk_check_hwblock_state() && !!t)
1280 		return -EPERM;
1281 
1282 	res = tpacpi_rfkill_switches[id]->ops->set_status((!!t) ?
1283 				TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF);
1284 	tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1285 
1286 	return (res < 0) ? res : count;
1287 }
1288 
1289 /* procfs -------------------------------------------------------------- */
1290 static int tpacpi_rfk_procfs_read(const enum tpacpi_rfk_id id, struct seq_file *m)
1291 {
1292 	if (id >= TPACPI_RFK_SW_MAX)
1293 		seq_printf(m, "status:\t\tnot supported\n");
1294 	else {
1295 		int status;
1296 
1297 		/* This is in the ABI... */
1298 		if (tpacpi_rfk_check_hwblock_state()) {
1299 			status = TPACPI_RFK_RADIO_OFF;
1300 		} else {
1301 			status = tpacpi_rfk_update_swstate(
1302 						tpacpi_rfkill_switches[id]);
1303 			if (status < 0)
1304 				return status;
1305 		}
1306 
1307 		seq_printf(m, "status:\t\t%s\n", str_enabled_disabled(status == TPACPI_RFK_RADIO_ON));
1308 		seq_printf(m, "commands:\tenable, disable\n");
1309 	}
1310 
1311 	return 0;
1312 }
1313 
1314 static int tpacpi_rfk_procfs_write(const enum tpacpi_rfk_id id, char *buf)
1315 {
1316 	char *cmd;
1317 	int status = -1;
1318 	int res = 0;
1319 
1320 	if (id >= TPACPI_RFK_SW_MAX)
1321 		return -ENODEV;
1322 
1323 	while ((cmd = strsep(&buf, ","))) {
1324 		if (strstarts(cmd, "enable"))
1325 			status = TPACPI_RFK_RADIO_ON;
1326 		else if (strstarts(cmd, "disable"))
1327 			status = TPACPI_RFK_RADIO_OFF;
1328 		else
1329 			return -EINVAL;
1330 	}
1331 
1332 	if (status != -1) {
1333 		tpacpi_disclose_usertask("procfs", "attempt to %s %s\n",
1334 				str_enable_disable(status == TPACPI_RFK_RADIO_ON),
1335 				tpacpi_rfkill_names[id]);
1336 		res = (tpacpi_rfkill_switches[id]->ops->set_status)(status);
1337 		tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1338 	}
1339 
1340 	return res;
1341 }
1342 
1343 /*************************************************************************
1344  * thinkpad-acpi driver attributes
1345  */
1346 
1347 /* interface_version --------------------------------------------------- */
1348 static ssize_t interface_version_show(struct device_driver *drv, char *buf)
1349 {
1350 	return sysfs_emit(buf, "0x%08x\n", TPACPI_SYSFS_VERSION);
1351 }
1352 static DRIVER_ATTR_RO(interface_version);
1353 
1354 /* debug_level --------------------------------------------------------- */
1355 static ssize_t debug_level_show(struct device_driver *drv, char *buf)
1356 {
1357 	return sysfs_emit(buf, "0x%04x\n", dbg_level);
1358 }
1359 
1360 static ssize_t debug_level_store(struct device_driver *drv, const char *buf,
1361 				 size_t count)
1362 {
1363 	unsigned long t;
1364 
1365 	if (parse_strtoul(buf, 0xffff, &t))
1366 		return -EINVAL;
1367 
1368 	dbg_level = t;
1369 
1370 	return count;
1371 }
1372 static DRIVER_ATTR_RW(debug_level);
1373 
1374 /* version ------------------------------------------------------------- */
1375 static ssize_t version_show(struct device_driver *drv, char *buf)
1376 {
1377 	return sysfs_emit(buf, "%s v%s\n",
1378 			TPACPI_DESC, TPACPI_VERSION);
1379 }
1380 static DRIVER_ATTR_RO(version);
1381 
1382 /* --------------------------------------------------------------------- */
1383 
1384 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1385 
1386 /* wlsw_emulstate ------------------------------------------------------ */
1387 static ssize_t wlsw_emulstate_show(struct device_driver *drv, char *buf)
1388 {
1389 	return sysfs_emit(buf, "%d\n", !!tpacpi_wlsw_emulstate);
1390 }
1391 
1392 static ssize_t wlsw_emulstate_store(struct device_driver *drv, const char *buf,
1393 				    size_t count)
1394 {
1395 	unsigned long t;
1396 
1397 	if (parse_strtoul(buf, 1, &t))
1398 		return -EINVAL;
1399 
1400 	if (tpacpi_wlsw_emulstate != !!t) {
1401 		tpacpi_wlsw_emulstate = !!t;
1402 		tpacpi_rfk_update_hwblock_state(!t);	/* negative logic */
1403 	}
1404 
1405 	return count;
1406 }
1407 static DRIVER_ATTR_RW(wlsw_emulstate);
1408 
1409 /* bluetooth_emulstate ------------------------------------------------- */
1410 static ssize_t bluetooth_emulstate_show(struct device_driver *drv, char *buf)
1411 {
1412 	return sysfs_emit(buf, "%d\n", !!tpacpi_bluetooth_emulstate);
1413 }
1414 
1415 static ssize_t bluetooth_emulstate_store(struct device_driver *drv,
1416 					 const char *buf, size_t count)
1417 {
1418 	unsigned long t;
1419 
1420 	if (parse_strtoul(buf, 1, &t))
1421 		return -EINVAL;
1422 
1423 	tpacpi_bluetooth_emulstate = !!t;
1424 
1425 	return count;
1426 }
1427 static DRIVER_ATTR_RW(bluetooth_emulstate);
1428 
1429 /* wwan_emulstate ------------------------------------------------- */
1430 static ssize_t wwan_emulstate_show(struct device_driver *drv, char *buf)
1431 {
1432 	return sysfs_emit(buf, "%d\n", !!tpacpi_wwan_emulstate);
1433 }
1434 
1435 static ssize_t wwan_emulstate_store(struct device_driver *drv, const char *buf,
1436 				    size_t count)
1437 {
1438 	unsigned long t;
1439 
1440 	if (parse_strtoul(buf, 1, &t))
1441 		return -EINVAL;
1442 
1443 	tpacpi_wwan_emulstate = !!t;
1444 
1445 	return count;
1446 }
1447 static DRIVER_ATTR_RW(wwan_emulstate);
1448 
1449 /* uwb_emulstate ------------------------------------------------- */
1450 static ssize_t uwb_emulstate_show(struct device_driver *drv, char *buf)
1451 {
1452 	return sysfs_emit(buf, "%d\n", !!tpacpi_uwb_emulstate);
1453 }
1454 
1455 static ssize_t uwb_emulstate_store(struct device_driver *drv, const char *buf,
1456 				   size_t count)
1457 {
1458 	unsigned long t;
1459 
1460 	if (parse_strtoul(buf, 1, &t))
1461 		return -EINVAL;
1462 
1463 	tpacpi_uwb_emulstate = !!t;
1464 
1465 	return count;
1466 }
1467 static DRIVER_ATTR_RW(uwb_emulstate);
1468 #endif
1469 
1470 /*************************************************************************
1471  * Firmware Data
1472  */
1473 
1474 /*
1475  * Table of recommended minimum BIOS versions
1476  *
1477  * Reasons for listing:
1478  *    1. Stable BIOS, listed because the unknown amount of
1479  *       bugs and bad ACPI behaviour on older versions
1480  *
1481  *    2. BIOS or EC fw with known bugs that trigger on Linux
1482  *
1483  *    3. BIOS with known reduced functionality in older versions
1484  *
1485  *  We recommend the latest BIOS and EC version.
1486  *  We only support the latest BIOS and EC fw version as a rule.
1487  *
1488  *  Sources: IBM ThinkPad Public Web Documents (update changelogs),
1489  *  Information from users in ThinkWiki
1490  *
1491  *  WARNING: we use this table also to detect that the machine is
1492  *  a ThinkPad in some cases, so don't remove entries lightly.
1493  */
1494 
1495 #define TPV_Q(__v, __id1, __id2, __bv1, __bv2)		\
1496 	{ .vendor	= (__v),			\
1497 	  .bios		= TPID(__id1, __id2),		\
1498 	  .ec		= TPACPI_MATCH_ANY,		\
1499 	  .quirks	= TPACPI_MATCH_ANY_VERSION << 16 \
1500 			  | TPVER(__bv1, __bv2) }
1501 
1502 #define TPV_Q_X(__v, __bid1, __bid2, __bv1, __bv2,	\
1503 		__eid, __ev1, __ev2)			\
1504 	{ .vendor	= (__v),			\
1505 	  .bios		= TPID(__bid1, __bid2),		\
1506 	  .ec		= __eid,			\
1507 	  .quirks	= TPVER(__ev1, __ev2) << 16	\
1508 			  | TPVER(__bv1, __bv2) }
1509 
1510 #define TPV_QI0(__id1, __id2, __bv1, __bv2) \
1511 	TPV_Q(PCI_VENDOR_ID_IBM, __id1, __id2, __bv1, __bv2)
1512 
1513 /* Outdated IBM BIOSes often lack the EC id string */
1514 #define TPV_QI1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \
1515 	TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2, 	\
1516 		__bv1, __bv2, TPID(__id1, __id2),	\
1517 		__ev1, __ev2),				\
1518 	TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2, 	\
1519 		__bv1, __bv2, TPACPI_MATCH_UNKNOWN,	\
1520 		__ev1, __ev2)
1521 
1522 /* Outdated IBM BIOSes often lack the EC id string */
1523 #define TPV_QI2(__bid1, __bid2, __bv1, __bv2,		\
1524 		__eid1, __eid2, __ev1, __ev2) 		\
1525 	TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2, 	\
1526 		__bv1, __bv2, TPID(__eid1, __eid2),	\
1527 		__ev1, __ev2),				\
1528 	TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2, 	\
1529 		__bv1, __bv2, TPACPI_MATCH_UNKNOWN,	\
1530 		__ev1, __ev2)
1531 
1532 #define TPV_QL0(__id1, __id2, __bv1, __bv2) \
1533 	TPV_Q(PCI_VENDOR_ID_LENOVO, __id1, __id2, __bv1, __bv2)
1534 
1535 #define TPV_QL1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \
1536 	TPV_Q_X(PCI_VENDOR_ID_LENOVO, __id1, __id2, 	\
1537 		__bv1, __bv2, TPID(__id1, __id2),	\
1538 		__ev1, __ev2)
1539 
1540 #define TPV_QL2(__bid1, __bid2, __bv1, __bv2,		\
1541 		__eid1, __eid2, __ev1, __ev2) 		\
1542 	TPV_Q_X(PCI_VENDOR_ID_LENOVO, __bid1, __bid2, 	\
1543 		__bv1, __bv2, TPID(__eid1, __eid2),	\
1544 		__ev1, __ev2)
1545 
1546 static const struct tpacpi_quirk tpacpi_bios_version_qtable[] __initconst = {
1547 	/*  Numeric models ------------------ */
1548 	/*      FW MODEL   BIOS VERS	      */
1549 	TPV_QI0('I', 'M',  '6', '5'),		 /* 570 */
1550 	TPV_QI0('I', 'U',  '2', '6'),		 /* 570E */
1551 	TPV_QI0('I', 'B',  '5', '4'),		 /* 600 */
1552 	TPV_QI0('I', 'H',  '4', '7'),		 /* 600E */
1553 	TPV_QI0('I', 'N',  '3', '6'),		 /* 600E */
1554 	TPV_QI0('I', 'T',  '5', '5'),		 /* 600X */
1555 	TPV_QI0('I', 'D',  '4', '8'),		 /* 770, 770E, 770ED */
1556 	TPV_QI0('I', 'I',  '4', '2'),		 /* 770X */
1557 	TPV_QI0('I', 'O',  '2', '3'),		 /* 770Z */
1558 
1559 	/* A-series ------------------------- */
1560 	/*      FW MODEL   BIOS VERS  EC VERS */
1561 	TPV_QI0('I', 'W',  '5', '9'),		 /* A20m */
1562 	TPV_QI0('I', 'V',  '6', '9'),		 /* A20p */
1563 	TPV_QI0('1', '0',  '2', '6'),		 /* A21e, A22e */
1564 	TPV_QI0('K', 'U',  '3', '6'),		 /* A21e */
1565 	TPV_QI0('K', 'X',  '3', '6'),		 /* A21m, A22m */
1566 	TPV_QI0('K', 'Y',  '3', '8'),		 /* A21p, A22p */
1567 	TPV_QI0('1', 'B',  '1', '7'),		 /* A22e */
1568 	TPV_QI0('1', '3',  '2', '0'),		 /* A22m */
1569 	TPV_QI0('1', 'E',  '7', '3'),		 /* A30/p (0) */
1570 	TPV_QI1('1', 'G',  '4', '1',  '1', '7'), /* A31/p (0) */
1571 	TPV_QI1('1', 'N',  '1', '6',  '0', '7'), /* A31/p (0) */
1572 
1573 	/* G-series ------------------------- */
1574 	/*      FW MODEL   BIOS VERS	      */
1575 	TPV_QI0('1', 'T',  'A', '6'),		 /* G40 */
1576 	TPV_QI0('1', 'X',  '5', '7'),		 /* G41 */
1577 
1578 	/* R-series, T-series --------------- */
1579 	/*      FW MODEL   BIOS VERS  EC VERS */
1580 	TPV_QI0('1', 'C',  'F', '0'),		 /* R30 */
1581 	TPV_QI0('1', 'F',  'F', '1'),		 /* R31 */
1582 	TPV_QI0('1', 'M',  '9', '7'),		 /* R32 */
1583 	TPV_QI0('1', 'O',  '6', '1'),		 /* R40 */
1584 	TPV_QI0('1', 'P',  '6', '5'),		 /* R40 */
1585 	TPV_QI0('1', 'S',  '7', '0'),		 /* R40e */
1586 	TPV_QI1('1', 'R',  'D', 'R',  '7', '1'), /* R50/p, R51,
1587 						    T40/p, T41/p, T42/p (1) */
1588 	TPV_QI1('1', 'V',  '7', '1',  '2', '8'), /* R50e, R51 (1) */
1589 	TPV_QI1('7', '8',  '7', '1',  '0', '6'), /* R51e (1) */
1590 	TPV_QI1('7', '6',  '6', '9',  '1', '6'), /* R52 (1) */
1591 	TPV_QI1('7', '0',  '6', '9',  '2', '8'), /* R52, T43 (1) */
1592 
1593 	TPV_QI0('I', 'Y',  '6', '1'),		 /* T20 */
1594 	TPV_QI0('K', 'Z',  '3', '4'),		 /* T21 */
1595 	TPV_QI0('1', '6',  '3', '2'),		 /* T22 */
1596 	TPV_QI1('1', 'A',  '6', '4',  '2', '3'), /* T23 (0) */
1597 	TPV_QI1('1', 'I',  '7', '1',  '2', '0'), /* T30 (0) */
1598 	TPV_QI1('1', 'Y',  '6', '5',  '2', '9'), /* T43/p (1) */
1599 
1600 	TPV_QL1('7', '9',  'E', '3',  '5', '0'), /* T60/p */
1601 	TPV_QL1('7', 'C',  'D', '2',  '2', '2'), /* R60, R60i */
1602 	TPV_QL1('7', 'E',  'D', '0',  '1', '5'), /* R60e, R60i */
1603 
1604 	/*      BIOS FW    BIOS VERS  EC FW     EC VERS */
1605 	TPV_QI2('1', 'W',  '9', '0',  '1', 'V', '2', '8'), /* R50e (1) */
1606 	TPV_QL2('7', 'I',  '3', '4',  '7', '9', '5', '0'), /* T60/p wide */
1607 
1608 	/* X-series ------------------------- */
1609 	/*      FW MODEL   BIOS VERS  EC VERS */
1610 	TPV_QI0('I', 'Z',  '9', 'D'),		 /* X20, X21 */
1611 	TPV_QI0('1', 'D',  '7', '0'),		 /* X22, X23, X24 */
1612 	TPV_QI1('1', 'K',  '4', '8',  '1', '8'), /* X30 (0) */
1613 	TPV_QI1('1', 'Q',  '9', '7',  '2', '3'), /* X31, X32 (0) */
1614 	TPV_QI1('1', 'U',  'D', '3',  'B', '2'), /* X40 (0) */
1615 	TPV_QI1('7', '4',  '6', '4',  '2', '7'), /* X41 (0) */
1616 	TPV_QI1('7', '5',  '6', '0',  '2', '0'), /* X41t (0) */
1617 
1618 	TPV_QL1('7', 'B',  'D', '7',  '4', '0'), /* X60/s */
1619 	TPV_QL1('7', 'J',  '3', '0',  '1', '3'), /* X60t */
1620 
1621 	/* (0) - older versions lack DMI EC fw string and functionality */
1622 	/* (1) - older versions known to lack functionality */
1623 };
1624 
1625 #undef TPV_QL1
1626 #undef TPV_QL0
1627 #undef TPV_QI2
1628 #undef TPV_QI1
1629 #undef TPV_QI0
1630 #undef TPV_Q_X
1631 #undef TPV_Q
1632 
1633 static void __init tpacpi_check_outdated_fw(void)
1634 {
1635 	unsigned long fwvers;
1636 	u16 ec_version, bios_version;
1637 
1638 	fwvers = tpacpi_check_quirks(tpacpi_bios_version_qtable,
1639 				ARRAY_SIZE(tpacpi_bios_version_qtable));
1640 
1641 	if (!fwvers)
1642 		return;
1643 
1644 	bios_version = fwvers & 0xffffU;
1645 	ec_version = (fwvers >> 16) & 0xffffU;
1646 
1647 	/* note that unknown versions are set to 0x0000 and we use that */
1648 	if ((bios_version > thinkpad_id.bios_release) ||
1649 	    (ec_version > thinkpad_id.ec_release &&
1650 				ec_version != TPACPI_MATCH_ANY_VERSION)) {
1651 		/*
1652 		 * The changelogs would let us track down the exact
1653 		 * reason, but it is just too much of a pain to track
1654 		 * it.  We only list BIOSes that are either really
1655 		 * broken, or really stable to begin with, so it is
1656 		 * best if the user upgrades the firmware anyway.
1657 		 */
1658 		pr_warn("WARNING: Outdated ThinkPad BIOS/EC firmware\n");
1659 		pr_warn("WARNING: This firmware may be missing critical bug fixes and/or important features\n");
1660 	}
1661 }
1662 
1663 static bool __init tpacpi_is_fw_known(void)
1664 {
1665 	return tpacpi_check_quirks(tpacpi_bios_version_qtable,
1666 			ARRAY_SIZE(tpacpi_bios_version_qtable)) != 0;
1667 }
1668 
1669 /****************************************************************************
1670  ****************************************************************************
1671  *
1672  * Subdrivers
1673  *
1674  ****************************************************************************
1675  ****************************************************************************/
1676 
1677 /*************************************************************************
1678  * thinkpad-acpi metadata subdriver
1679  */
1680 
1681 static int thinkpad_acpi_driver_read(struct seq_file *m)
1682 {
1683 	seq_printf(m, "driver:\t\t%s\n", TPACPI_DESC);
1684 	seq_printf(m, "version:\t%s\n", TPACPI_VERSION);
1685 	return 0;
1686 }
1687 
1688 static struct ibm_struct thinkpad_acpi_driver_data = {
1689 	.name = "driver",
1690 	.read = thinkpad_acpi_driver_read,
1691 };
1692 
1693 /*************************************************************************
1694  * Hotkey subdriver
1695  */
1696 
1697 /*
1698  * ThinkPad firmware event model
1699  *
1700  * The ThinkPad firmware has two main event interfaces: normal ACPI
1701  * notifications (which follow the ACPI standard), and a private event
1702  * interface.
1703  *
1704  * The private event interface also issues events for the hotkeys.  As
1705  * the driver gained features, the event handling code ended up being
1706  * built around the hotkey subdriver.  This will need to be refactored
1707  * to a more formal event API eventually.
1708  *
1709  * Some "hotkeys" are actually supposed to be used as event reports,
1710  * such as "brightness has changed", "volume has changed", depending on
1711  * the ThinkPad model and how the firmware is operating.
1712  *
1713  * Unlike other classes, hotkey-class events have mask/unmask control on
1714  * non-ancient firmware.  However, how it behaves changes a lot with the
1715  * firmware model and version.
1716  */
1717 
1718 enum {	/* hot key scan codes (derived from ACPI DSDT) */
1719 	TP_ACPI_HOTKEYSCAN_FNF1		= 0,
1720 	TP_ACPI_HOTKEYSCAN_FNF2,
1721 	TP_ACPI_HOTKEYSCAN_FNF3,
1722 	TP_ACPI_HOTKEYSCAN_FNF4,
1723 	TP_ACPI_HOTKEYSCAN_FNF5,
1724 	TP_ACPI_HOTKEYSCAN_FNF6,
1725 	TP_ACPI_HOTKEYSCAN_FNF7,
1726 	TP_ACPI_HOTKEYSCAN_FNF8,
1727 	TP_ACPI_HOTKEYSCAN_FNF9,
1728 	TP_ACPI_HOTKEYSCAN_FNF10,
1729 	TP_ACPI_HOTKEYSCAN_FNF11,
1730 	TP_ACPI_HOTKEYSCAN_FNF12,
1731 	TP_ACPI_HOTKEYSCAN_FNBACKSPACE,
1732 	TP_ACPI_HOTKEYSCAN_FNINSERT,
1733 	TP_ACPI_HOTKEYSCAN_FNDELETE,
1734 	TP_ACPI_HOTKEYSCAN_FNHOME,
1735 	TP_ACPI_HOTKEYSCAN_FNEND,
1736 	TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1737 	TP_ACPI_HOTKEYSCAN_FNPAGEDOWN,
1738 	TP_ACPI_HOTKEYSCAN_FNSPACE,
1739 	TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1740 	TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1741 	TP_ACPI_HOTKEYSCAN_MUTE,
1742 	TP_ACPI_HOTKEYSCAN_THINKPAD,
1743 	TP_ACPI_HOTKEYSCAN_UNK1,
1744 	TP_ACPI_HOTKEYSCAN_UNK2,
1745 	TP_ACPI_HOTKEYSCAN_UNK3,
1746 	TP_ACPI_HOTKEYSCAN_UNK4,
1747 	TP_ACPI_HOTKEYSCAN_UNK5,
1748 	TP_ACPI_HOTKEYSCAN_UNK6,
1749 	TP_ACPI_HOTKEYSCAN_UNK7,
1750 	TP_ACPI_HOTKEYSCAN_UNK8,
1751 
1752 	/* Adaptive keyboard keycodes */
1753 	TP_ACPI_HOTKEYSCAN_ADAPTIVE_START,
1754 	TP_ACPI_HOTKEYSCAN_MUTE2        = TP_ACPI_HOTKEYSCAN_ADAPTIVE_START,
1755 	TP_ACPI_HOTKEYSCAN_BRIGHTNESS_ZERO,
1756 	TP_ACPI_HOTKEYSCAN_CLIPPING_TOOL,
1757 	TP_ACPI_HOTKEYSCAN_CLOUD,
1758 	TP_ACPI_HOTKEYSCAN_UNK9,
1759 	TP_ACPI_HOTKEYSCAN_VOICE,
1760 	TP_ACPI_HOTKEYSCAN_UNK10,
1761 	TP_ACPI_HOTKEYSCAN_GESTURES,
1762 	TP_ACPI_HOTKEYSCAN_UNK11,
1763 	TP_ACPI_HOTKEYSCAN_UNK12,
1764 	TP_ACPI_HOTKEYSCAN_UNK13,
1765 	TP_ACPI_HOTKEYSCAN_CONFIG,
1766 	TP_ACPI_HOTKEYSCAN_NEW_TAB,
1767 	TP_ACPI_HOTKEYSCAN_RELOAD,
1768 	TP_ACPI_HOTKEYSCAN_BACK,
1769 	TP_ACPI_HOTKEYSCAN_MIC_DOWN,
1770 	TP_ACPI_HOTKEYSCAN_MIC_UP,
1771 	TP_ACPI_HOTKEYSCAN_MIC_CANCELLATION,
1772 	TP_ACPI_HOTKEYSCAN_CAMERA_MODE,
1773 	TP_ACPI_HOTKEYSCAN_ROTATE_DISPLAY,
1774 
1775 	/* Lenovo extended keymap, starting at 0x1300 */
1776 	TP_ACPI_HOTKEYSCAN_EXTENDED_START,
1777 	/* first new observed key (star, favorites) is 0x1311 */
1778 	TP_ACPI_HOTKEYSCAN_STAR = 69,
1779 	TP_ACPI_HOTKEYSCAN_CLIPPING_TOOL2,
1780 	TP_ACPI_HOTKEYSCAN_CALCULATOR,
1781 	TP_ACPI_HOTKEYSCAN_BLUETOOTH,
1782 	TP_ACPI_HOTKEYSCAN_KEYBOARD,
1783 	TP_ACPI_HOTKEYSCAN_FN_RIGHT_SHIFT, /* Used by "Lenovo Quick Clean" */
1784 	TP_ACPI_HOTKEYSCAN_NOTIFICATION_CENTER,
1785 	TP_ACPI_HOTKEYSCAN_PICKUP_PHONE,
1786 	TP_ACPI_HOTKEYSCAN_HANGUP_PHONE,
1787 
1788 	/* Hotkey keymap size */
1789 	TPACPI_HOTKEY_MAP_LEN
1790 };
1791 
1792 enum {	/* Keys/events available through NVRAM polling */
1793 	TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U,
1794 	TPACPI_HKEY_NVRAM_GOOD_MASK  = 0x00fb8000U,
1795 };
1796 
1797 enum {	/* Positions of some of the keys in hotkey masks */
1798 	TP_ACPI_HKEY_DISPSWTCH_MASK	= 1 << TP_ACPI_HOTKEYSCAN_FNF7,
1799 	TP_ACPI_HKEY_DISPXPAND_MASK	= 1 << TP_ACPI_HOTKEYSCAN_FNF8,
1800 	TP_ACPI_HKEY_HIBERNATE_MASK	= 1 << TP_ACPI_HOTKEYSCAN_FNF12,
1801 	TP_ACPI_HKEY_BRGHTUP_MASK	= 1 << TP_ACPI_HOTKEYSCAN_FNHOME,
1802 	TP_ACPI_HKEY_BRGHTDWN_MASK	= 1 << TP_ACPI_HOTKEYSCAN_FNEND,
1803 	TP_ACPI_HKEY_KBD_LIGHT_MASK	= 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1804 	TP_ACPI_HKEY_ZOOM_MASK		= 1 << TP_ACPI_HOTKEYSCAN_FNSPACE,
1805 	TP_ACPI_HKEY_VOLUP_MASK		= 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1806 	TP_ACPI_HKEY_VOLDWN_MASK	= 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1807 	TP_ACPI_HKEY_MUTE_MASK		= 1 << TP_ACPI_HOTKEYSCAN_MUTE,
1808 	TP_ACPI_HKEY_THINKPAD_MASK	= 1 << TP_ACPI_HOTKEYSCAN_THINKPAD,
1809 };
1810 
1811 enum {	/* NVRAM to ACPI HKEY group map */
1812 	TP_NVRAM_HKEY_GROUP_HK2		= TP_ACPI_HKEY_THINKPAD_MASK |
1813 					  TP_ACPI_HKEY_ZOOM_MASK |
1814 					  TP_ACPI_HKEY_DISPSWTCH_MASK |
1815 					  TP_ACPI_HKEY_HIBERNATE_MASK,
1816 	TP_NVRAM_HKEY_GROUP_BRIGHTNESS	= TP_ACPI_HKEY_BRGHTUP_MASK |
1817 					  TP_ACPI_HKEY_BRGHTDWN_MASK,
1818 	TP_NVRAM_HKEY_GROUP_VOLUME	= TP_ACPI_HKEY_VOLUP_MASK |
1819 					  TP_ACPI_HKEY_VOLDWN_MASK |
1820 					  TP_ACPI_HKEY_MUTE_MASK,
1821 };
1822 
1823 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1824 struct tp_nvram_state {
1825        u16 thinkpad_toggle:1;
1826        u16 zoom_toggle:1;
1827        u16 display_toggle:1;
1828        u16 thinklight_toggle:1;
1829        u16 hibernate_toggle:1;
1830        u16 displayexp_toggle:1;
1831        u16 display_state:1;
1832        u16 brightness_toggle:1;
1833        u16 volume_toggle:1;
1834        u16 mute:1;
1835 
1836        u8 brightness_level;
1837        u8 volume_level;
1838 };
1839 
1840 /* kthread for the hotkey poller */
1841 static struct task_struct *tpacpi_hotkey_task;
1842 
1843 /*
1844  * Acquire mutex to write poller control variables as an
1845  * atomic block.
1846  *
1847  * Increment hotkey_config_change when changing them if you
1848  * want the kthread to forget old state.
1849  *
1850  * See HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END
1851  */
1852 static struct mutex hotkey_thread_data_mutex;
1853 static unsigned int hotkey_config_change;
1854 
1855 /*
1856  * hotkey poller control variables
1857  *
1858  * Must be atomic or readers will also need to acquire mutex
1859  *
1860  * HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END
1861  * should be used only when the changes need to be taken as
1862  * a block, OR when one needs to force the kthread to forget
1863  * old state.
1864  */
1865 static u32 hotkey_source_mask;		/* bit mask 0=ACPI,1=NVRAM */
1866 static unsigned int hotkey_poll_freq = 10; /* Hz */
1867 
1868 #define HOTKEY_CONFIG_CRITICAL_START \
1869 	do { \
1870 		mutex_lock(&hotkey_thread_data_mutex); \
1871 		hotkey_config_change++; \
1872 	} while (0);
1873 #define HOTKEY_CONFIG_CRITICAL_END \
1874 	mutex_unlock(&hotkey_thread_data_mutex);
1875 
1876 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1877 
1878 #define hotkey_source_mask 0U
1879 #define HOTKEY_CONFIG_CRITICAL_START
1880 #define HOTKEY_CONFIG_CRITICAL_END
1881 
1882 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1883 
1884 static struct mutex hotkey_mutex;
1885 
1886 static enum {	/* Reasons for waking up */
1887 	TP_ACPI_WAKEUP_NONE = 0,	/* None or unknown */
1888 	TP_ACPI_WAKEUP_BAYEJ,		/* Bay ejection request */
1889 	TP_ACPI_WAKEUP_UNDOCK,		/* Undock request */
1890 } hotkey_wakeup_reason;
1891 
1892 static int hotkey_autosleep_ack;
1893 
1894 static u32 hotkey_orig_mask;		/* events the BIOS had enabled */
1895 static u32 hotkey_all_mask;		/* all events supported in fw */
1896 static u32 hotkey_adaptive_all_mask;	/* all adaptive events supported in fw */
1897 static u32 hotkey_reserved_mask;	/* events better left disabled */
1898 static u32 hotkey_driver_mask;		/* events needed by the driver */
1899 static u32 hotkey_user_mask;		/* events visible to userspace */
1900 static u32 hotkey_acpi_mask;		/* events enabled in firmware */
1901 
1902 static u16 *hotkey_keycode_map;
1903 
1904 static void tpacpi_driver_event(const unsigned int hkey_event);
1905 static void hotkey_driver_event(const unsigned int scancode);
1906 static void hotkey_poll_setup(const bool may_warn);
1907 
1908 /* HKEY.MHKG() return bits */
1909 #define TP_HOTKEY_TABLET_MASK (1 << 3)
1910 enum {
1911 	TP_ACPI_MULTI_MODE_INVALID	= 0,
1912 	TP_ACPI_MULTI_MODE_UNKNOWN	= 1 << 0,
1913 	TP_ACPI_MULTI_MODE_LAPTOP	= 1 << 1,
1914 	TP_ACPI_MULTI_MODE_TABLET	= 1 << 2,
1915 	TP_ACPI_MULTI_MODE_FLAT		= 1 << 3,
1916 	TP_ACPI_MULTI_MODE_STAND	= 1 << 4,
1917 	TP_ACPI_MULTI_MODE_TENT		= 1 << 5,
1918 	TP_ACPI_MULTI_MODE_STAND_TENT	= 1 << 6,
1919 };
1920 
1921 enum {
1922 	/* The following modes are considered tablet mode for the purpose of
1923 	 * reporting the status to userspace. i.e. in all these modes it makes
1924 	 * sense to disable the laptop input devices such as touchpad and
1925 	 * keyboard.
1926 	 */
1927 	TP_ACPI_MULTI_MODE_TABLET_LIKE	= TP_ACPI_MULTI_MODE_TABLET |
1928 					  TP_ACPI_MULTI_MODE_STAND |
1929 					  TP_ACPI_MULTI_MODE_TENT |
1930 					  TP_ACPI_MULTI_MODE_STAND_TENT,
1931 };
1932 
1933 static int hotkey_get_wlsw(void)
1934 {
1935 	int status;
1936 
1937 	if (!tp_features.hotkey_wlsw)
1938 		return -ENODEV;
1939 
1940 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1941 	if (dbg_wlswemul)
1942 		return (tpacpi_wlsw_emulstate) ?
1943 				TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
1944 #endif
1945 
1946 	if (!acpi_evalf(hkey_handle, &status, "WLSW", "d"))
1947 		return -EIO;
1948 
1949 	return (status) ? TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
1950 }
1951 
1952 static int hotkey_gmms_get_tablet_mode(int s, int *has_tablet_mode)
1953 {
1954 	int type = (s >> 16) & 0xffff;
1955 	int value = s & 0xffff;
1956 	int mode = TP_ACPI_MULTI_MODE_INVALID;
1957 	int valid_modes = 0;
1958 
1959 	if (has_tablet_mode)
1960 		*has_tablet_mode = 0;
1961 
1962 	switch (type) {
1963 	case 1:
1964 		valid_modes = TP_ACPI_MULTI_MODE_LAPTOP |
1965 			      TP_ACPI_MULTI_MODE_TABLET |
1966 			      TP_ACPI_MULTI_MODE_STAND_TENT;
1967 		break;
1968 	case 2:
1969 		valid_modes = TP_ACPI_MULTI_MODE_LAPTOP |
1970 			      TP_ACPI_MULTI_MODE_FLAT |
1971 			      TP_ACPI_MULTI_MODE_TABLET |
1972 			      TP_ACPI_MULTI_MODE_STAND |
1973 			      TP_ACPI_MULTI_MODE_TENT;
1974 		break;
1975 	case 3:
1976 		valid_modes = TP_ACPI_MULTI_MODE_LAPTOP |
1977 			      TP_ACPI_MULTI_MODE_FLAT;
1978 		break;
1979 	case 4:
1980 	case 5:
1981 		/* In mode 4, FLAT is not specified as a valid mode. However,
1982 		 * it can be seen at least on the X1 Yoga 2nd Generation.
1983 		 */
1984 		valid_modes = TP_ACPI_MULTI_MODE_LAPTOP |
1985 			      TP_ACPI_MULTI_MODE_FLAT |
1986 			      TP_ACPI_MULTI_MODE_TABLET |
1987 			      TP_ACPI_MULTI_MODE_STAND |
1988 			      TP_ACPI_MULTI_MODE_TENT;
1989 		break;
1990 	default:
1991 		pr_err("Unknown multi mode status type %d with value 0x%04X, please report this to %s\n",
1992 		       type, value, TPACPI_MAIL);
1993 		return 0;
1994 	}
1995 
1996 	if (has_tablet_mode && (valid_modes & TP_ACPI_MULTI_MODE_TABLET_LIKE))
1997 		*has_tablet_mode = 1;
1998 
1999 	switch (value) {
2000 	case 1:
2001 		mode = TP_ACPI_MULTI_MODE_LAPTOP;
2002 		break;
2003 	case 2:
2004 		mode = TP_ACPI_MULTI_MODE_FLAT;
2005 		break;
2006 	case 3:
2007 		mode = TP_ACPI_MULTI_MODE_TABLET;
2008 		break;
2009 	case 4:
2010 		if (type == 1)
2011 			mode = TP_ACPI_MULTI_MODE_STAND_TENT;
2012 		else
2013 			mode = TP_ACPI_MULTI_MODE_STAND;
2014 		break;
2015 	case 5:
2016 		mode = TP_ACPI_MULTI_MODE_TENT;
2017 		break;
2018 	default:
2019 		if (type == 5 && value == 0xffff) {
2020 			pr_warn("Multi mode status is undetected, assuming laptop\n");
2021 			return 0;
2022 		}
2023 	}
2024 
2025 	if (!(mode & valid_modes)) {
2026 		pr_err("Unknown/reserved multi mode value 0x%04X for type %d, please report this to %s\n",
2027 		       value, type, TPACPI_MAIL);
2028 		return 0;
2029 	}
2030 
2031 	return !!(mode & TP_ACPI_MULTI_MODE_TABLET_LIKE);
2032 }
2033 
2034 static int hotkey_get_tablet_mode(int *status)
2035 {
2036 	int s;
2037 
2038 	switch (tp_features.hotkey_tablet) {
2039 	case TP_HOTKEY_TABLET_USES_MHKG:
2040 		if (!acpi_evalf(hkey_handle, &s, "MHKG", "d"))
2041 			return -EIO;
2042 
2043 		*status = ((s & TP_HOTKEY_TABLET_MASK) != 0);
2044 		break;
2045 	case TP_HOTKEY_TABLET_USES_GMMS:
2046 		if (!acpi_evalf(hkey_handle, &s, "GMMS", "dd", 0))
2047 			return -EIO;
2048 
2049 		*status = hotkey_gmms_get_tablet_mode(s, NULL);
2050 		break;
2051 	default:
2052 		break;
2053 	}
2054 
2055 	return 0;
2056 }
2057 
2058 /*
2059  * Reads current event mask from firmware, and updates
2060  * hotkey_acpi_mask accordingly.  Also resets any bits
2061  * from hotkey_user_mask that are unavailable to be
2062  * delivered (shadow requirement of the userspace ABI).
2063  */
2064 static int hotkey_mask_get(void)
2065 {
2066 	lockdep_assert_held(&hotkey_mutex);
2067 
2068 	if (tp_features.hotkey_mask) {
2069 		u32 m = 0;
2070 
2071 		if (!acpi_evalf(hkey_handle, &m, "DHKN", "d"))
2072 			return -EIO;
2073 
2074 		hotkey_acpi_mask = m;
2075 	} else {
2076 		/* no mask support doesn't mean no event support... */
2077 		hotkey_acpi_mask = hotkey_all_mask;
2078 	}
2079 
2080 	/* sync userspace-visible mask */
2081 	hotkey_user_mask &= (hotkey_acpi_mask | hotkey_source_mask);
2082 
2083 	return 0;
2084 }
2085 
2086 static void hotkey_mask_warn_incomplete_mask(void)
2087 {
2088 	/* log only what the user can fix... */
2089 	const u32 wantedmask = hotkey_driver_mask &
2090 		~(hotkey_acpi_mask | hotkey_source_mask) &
2091 		(hotkey_all_mask | TPACPI_HKEY_NVRAM_KNOWN_MASK);
2092 
2093 	if (wantedmask)
2094 		pr_notice("required events 0x%08x not enabled!\n", wantedmask);
2095 }
2096 
2097 /*
2098  * Set the firmware mask when supported
2099  *
2100  * Also calls hotkey_mask_get to update hotkey_acpi_mask.
2101  *
2102  * NOTE: does not set bits in hotkey_user_mask, but may reset them.
2103  */
2104 static int hotkey_mask_set(u32 mask)
2105 {
2106 	int i;
2107 	int rc = 0;
2108 
2109 	const u32 fwmask = mask & ~hotkey_source_mask;
2110 
2111 	lockdep_assert_held(&hotkey_mutex);
2112 
2113 	if (tp_features.hotkey_mask) {
2114 		for (i = 0; i < 32; i++) {
2115 			if (!acpi_evalf(hkey_handle,
2116 					NULL, "MHKM", "vdd", i + 1,
2117 					!!(mask & (1 << i)))) {
2118 				rc = -EIO;
2119 				break;
2120 			}
2121 		}
2122 	}
2123 
2124 	/*
2125 	 * We *must* make an inconditional call to hotkey_mask_get to
2126 	 * refresh hotkey_acpi_mask and update hotkey_user_mask
2127 	 *
2128 	 * Take the opportunity to also log when we cannot _enable_
2129 	 * a given event.
2130 	 */
2131 	if (!hotkey_mask_get() && !rc && (fwmask & ~hotkey_acpi_mask)) {
2132 		pr_notice("asked for hotkey mask 0x%08x, but firmware forced it to 0x%08x\n",
2133 			  fwmask, hotkey_acpi_mask);
2134 	}
2135 
2136 	if (tpacpi_lifecycle != TPACPI_LIFE_EXITING)
2137 		hotkey_mask_warn_incomplete_mask();
2138 
2139 	return rc;
2140 }
2141 
2142 /*
2143  * Sets hotkey_user_mask and tries to set the firmware mask
2144  */
2145 static int hotkey_user_mask_set(const u32 mask)
2146 {
2147 	int rc;
2148 
2149 	lockdep_assert_held(&hotkey_mutex);
2150 
2151 	/* Give people a chance to notice they are doing something that
2152 	 * is bound to go boom on their users sooner or later */
2153 	if (!tp_warned.hotkey_mask_ff &&
2154 	    (mask == 0xffff || mask == 0xffffff ||
2155 	     mask == 0xffffffff)) {
2156 		tp_warned.hotkey_mask_ff = 1;
2157 		pr_notice("setting the hotkey mask to 0x%08x is likely not the best way to go about it\n",
2158 			  mask);
2159 		pr_notice("please consider using the driver defaults, and refer to up-to-date thinkpad-acpi documentation\n");
2160 	}
2161 
2162 	/* Try to enable what the user asked for, plus whatever we need.
2163 	 * this syncs everything but won't enable bits in hotkey_user_mask */
2164 	rc = hotkey_mask_set((mask | hotkey_driver_mask) & ~hotkey_source_mask);
2165 
2166 	/* Enable the available bits in hotkey_user_mask */
2167 	hotkey_user_mask = mask & (hotkey_acpi_mask | hotkey_source_mask);
2168 
2169 	return rc;
2170 }
2171 
2172 /*
2173  * Sets the driver hotkey mask.
2174  *
2175  * Can be called even if the hotkey subdriver is inactive
2176  */
2177 static int tpacpi_hotkey_driver_mask_set(const u32 mask)
2178 {
2179 	int rc;
2180 
2181 	/* Do the right thing if hotkey_init has not been called yet */
2182 	if (!tp_features.hotkey) {
2183 		hotkey_driver_mask = mask;
2184 		return 0;
2185 	}
2186 
2187 	mutex_lock(&hotkey_mutex);
2188 
2189 	HOTKEY_CONFIG_CRITICAL_START
2190 	hotkey_driver_mask = mask;
2191 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2192 	hotkey_source_mask |= (mask & ~hotkey_all_mask);
2193 #endif
2194 	HOTKEY_CONFIG_CRITICAL_END
2195 
2196 	rc = hotkey_mask_set((hotkey_acpi_mask | hotkey_driver_mask) &
2197 							~hotkey_source_mask);
2198 	hotkey_poll_setup(true);
2199 
2200 	mutex_unlock(&hotkey_mutex);
2201 
2202 	return rc;
2203 }
2204 
2205 static int hotkey_status_get(int *status)
2206 {
2207 	if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
2208 		return -EIO;
2209 
2210 	return 0;
2211 }
2212 
2213 static int hotkey_status_set(bool enable)
2214 {
2215 	if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", enable ? 1 : 0))
2216 		return -EIO;
2217 
2218 	return 0;
2219 }
2220 
2221 static void tpacpi_input_send_tabletsw(void)
2222 {
2223 	int state;
2224 
2225 	if (tp_features.hotkey_tablet &&
2226 	    !hotkey_get_tablet_mode(&state)) {
2227 		mutex_lock(&tpacpi_inputdev_send_mutex);
2228 
2229 		input_report_switch(tpacpi_inputdev,
2230 				    SW_TABLET_MODE, !!state);
2231 		input_sync(tpacpi_inputdev);
2232 
2233 		mutex_unlock(&tpacpi_inputdev_send_mutex);
2234 	}
2235 }
2236 
2237 /* Do NOT call without validating scancode first */
2238 static void tpacpi_input_send_key(const unsigned int scancode)
2239 {
2240 	const unsigned int keycode = hotkey_keycode_map[scancode];
2241 
2242 	if (keycode != KEY_RESERVED) {
2243 		mutex_lock(&tpacpi_inputdev_send_mutex);
2244 
2245 		input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN, scancode);
2246 		input_report_key(tpacpi_inputdev, keycode, 1);
2247 		input_sync(tpacpi_inputdev);
2248 
2249 		input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN, scancode);
2250 		input_report_key(tpacpi_inputdev, keycode, 0);
2251 		input_sync(tpacpi_inputdev);
2252 
2253 		mutex_unlock(&tpacpi_inputdev_send_mutex);
2254 	}
2255 }
2256 
2257 /* Do NOT call without validating scancode first */
2258 static void tpacpi_input_send_key_masked(const unsigned int scancode)
2259 {
2260 	hotkey_driver_event(scancode);
2261 	if (hotkey_user_mask & (1 << scancode))
2262 		tpacpi_input_send_key(scancode);
2263 }
2264 
2265 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2266 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver;
2267 
2268 /* Do NOT call without validating scancode first */
2269 static void tpacpi_hotkey_send_key(unsigned int scancode)
2270 {
2271 	tpacpi_input_send_key_masked(scancode);
2272 }
2273 
2274 static void hotkey_read_nvram(struct tp_nvram_state *n, const u32 m)
2275 {
2276 	u8 d;
2277 
2278 	if (m & TP_NVRAM_HKEY_GROUP_HK2) {
2279 		d = nvram_read_byte(TP_NVRAM_ADDR_HK2);
2280 		n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD);
2281 		n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM);
2282 		n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY);
2283 		n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE);
2284 	}
2285 	if (m & TP_ACPI_HKEY_KBD_LIGHT_MASK) {
2286 		d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT);
2287 		n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT);
2288 	}
2289 	if (m & TP_ACPI_HKEY_DISPXPAND_MASK) {
2290 		d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO);
2291 		n->displayexp_toggle =
2292 				!!(d & TP_NVRAM_MASK_HKT_DISPEXPND);
2293 	}
2294 	if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) {
2295 		d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
2296 		n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
2297 				>> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
2298 		n->brightness_toggle =
2299 				!!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS);
2300 	}
2301 	if (m & TP_NVRAM_HKEY_GROUP_VOLUME) {
2302 		d = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
2303 		n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME)
2304 				>> TP_NVRAM_POS_LEVEL_VOLUME;
2305 		n->mute = !!(d & TP_NVRAM_MASK_MUTE);
2306 		n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME);
2307 	}
2308 }
2309 
2310 #define TPACPI_COMPARE_KEY(__scancode, __member) \
2311 do { \
2312 	if ((event_mask & (1 << __scancode)) && \
2313 	    oldn->__member != newn->__member) \
2314 		tpacpi_hotkey_send_key(__scancode); \
2315 } while (0)
2316 
2317 #define TPACPI_MAY_SEND_KEY(__scancode) \
2318 do { \
2319 	if (event_mask & (1 << __scancode)) \
2320 		tpacpi_hotkey_send_key(__scancode); \
2321 } while (0)
2322 
2323 static void issue_volchange(const unsigned int oldvol,
2324 			    const unsigned int newvol,
2325 			    const u32 event_mask)
2326 {
2327 	unsigned int i = oldvol;
2328 
2329 	while (i > newvol) {
2330 		TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
2331 		i--;
2332 	}
2333 	while (i < newvol) {
2334 		TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2335 		i++;
2336 	}
2337 }
2338 
2339 static void issue_brightnesschange(const unsigned int oldbrt,
2340 				   const unsigned int newbrt,
2341 				   const u32 event_mask)
2342 {
2343 	unsigned int i = oldbrt;
2344 
2345 	while (i > newbrt) {
2346 		TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2347 		i--;
2348 	}
2349 	while (i < newbrt) {
2350 		TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2351 		i++;
2352 	}
2353 }
2354 
2355 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn,
2356 					   struct tp_nvram_state *newn,
2357 					   const u32 event_mask)
2358 {
2359 
2360 	TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle);
2361 	TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle);
2362 	TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle);
2363 	TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle);
2364 
2365 	TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle);
2366 
2367 	TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle);
2368 
2369 	/*
2370 	 * Handle volume
2371 	 *
2372 	 * This code is supposed to duplicate the IBM firmware behaviour:
2373 	 * - Pressing MUTE issues mute hotkey message, even when already mute
2374 	 * - Pressing Volume up/down issues volume up/down hotkey messages,
2375 	 *   even when already at maximum or minimum volume
2376 	 * - The act of unmuting issues volume up/down notification,
2377 	 *   depending which key was used to unmute
2378 	 *
2379 	 * We are constrained to what the NVRAM can tell us, which is not much
2380 	 * and certainly not enough if more than one volume hotkey was pressed
2381 	 * since the last poll cycle.
2382 	 *
2383 	 * Just to make our life interesting, some newer Lenovo ThinkPads have
2384 	 * bugs in the BIOS and may fail to update volume_toggle properly.
2385 	 */
2386 	if (newn->mute) {
2387 		/* muted */
2388 		if (!oldn->mute ||
2389 		    oldn->volume_toggle != newn->volume_toggle ||
2390 		    oldn->volume_level != newn->volume_level) {
2391 			/* recently muted, or repeated mute keypress, or
2392 			 * multiple presses ending in mute */
2393 			issue_volchange(oldn->volume_level, newn->volume_level,
2394 				event_mask);
2395 			TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
2396 		}
2397 	} else {
2398 		/* unmute */
2399 		if (oldn->mute) {
2400 			/* recently unmuted, issue 'unmute' keypress */
2401 			TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2402 		}
2403 		if (oldn->volume_level != newn->volume_level) {
2404 			issue_volchange(oldn->volume_level, newn->volume_level,
2405 				event_mask);
2406 		} else if (oldn->volume_toggle != newn->volume_toggle) {
2407 			/* repeated vol up/down keypress at end of scale ? */
2408 			if (newn->volume_level == 0)
2409 				TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
2410 			else if (newn->volume_level >= TP_NVRAM_LEVEL_VOLUME_MAX)
2411 				TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2412 		}
2413 	}
2414 
2415 	/* handle brightness */
2416 	if (oldn->brightness_level != newn->brightness_level) {
2417 		issue_brightnesschange(oldn->brightness_level,
2418 				       newn->brightness_level, event_mask);
2419 	} else if (oldn->brightness_toggle != newn->brightness_toggle) {
2420 		/* repeated key presses that didn't change state */
2421 		if (newn->brightness_level == 0)
2422 			TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2423 		else if (newn->brightness_level >= bright_maxlvl
2424 				&& !tp_features.bright_unkfw)
2425 			TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2426 	}
2427 
2428 #undef TPACPI_COMPARE_KEY
2429 #undef TPACPI_MAY_SEND_KEY
2430 }
2431 
2432 /*
2433  * Polling driver
2434  *
2435  * We track all events in hotkey_source_mask all the time, since
2436  * most of them are edge-based.  We only issue those requested by
2437  * hotkey_user_mask or hotkey_driver_mask, though.
2438  */
2439 static int hotkey_kthread(void *data)
2440 {
2441 	struct tp_nvram_state s[2] = { 0 };
2442 	u32 poll_mask, event_mask;
2443 	unsigned int si, so;
2444 	unsigned long t;
2445 	unsigned int change_detector;
2446 	unsigned int poll_freq;
2447 	bool was_frozen;
2448 
2449 	if (tpacpi_lifecycle == TPACPI_LIFE_EXITING)
2450 		goto exit;
2451 
2452 	set_freezable();
2453 
2454 	so = 0;
2455 	si = 1;
2456 	t = 0;
2457 
2458 	/* Initial state for compares */
2459 	mutex_lock(&hotkey_thread_data_mutex);
2460 	change_detector = hotkey_config_change;
2461 	poll_mask = hotkey_source_mask;
2462 	event_mask = hotkey_source_mask &
2463 			(hotkey_driver_mask | hotkey_user_mask);
2464 	poll_freq = hotkey_poll_freq;
2465 	mutex_unlock(&hotkey_thread_data_mutex);
2466 	hotkey_read_nvram(&s[so], poll_mask);
2467 
2468 	while (!kthread_should_stop()) {
2469 		if (t == 0) {
2470 			if (likely(poll_freq))
2471 				t = 1000/poll_freq;
2472 			else
2473 				t = 100;	/* should never happen... */
2474 		}
2475 		t = msleep_interruptible(t);
2476 		if (unlikely(kthread_freezable_should_stop(&was_frozen)))
2477 			break;
2478 
2479 		if (t > 0 && !was_frozen)
2480 			continue;
2481 
2482 		mutex_lock(&hotkey_thread_data_mutex);
2483 		if (was_frozen || hotkey_config_change != change_detector) {
2484 			/* forget old state on thaw or config change */
2485 			si = so;
2486 			t = 0;
2487 			change_detector = hotkey_config_change;
2488 		}
2489 		poll_mask = hotkey_source_mask;
2490 		event_mask = hotkey_source_mask &
2491 				(hotkey_driver_mask | hotkey_user_mask);
2492 		poll_freq = hotkey_poll_freq;
2493 		mutex_unlock(&hotkey_thread_data_mutex);
2494 
2495 		if (likely(poll_mask)) {
2496 			hotkey_read_nvram(&s[si], poll_mask);
2497 			if (likely(si != so)) {
2498 				hotkey_compare_and_issue_event(&s[so], &s[si],
2499 								event_mask);
2500 			}
2501 		}
2502 
2503 		so = si;
2504 		si ^= 1;
2505 	}
2506 
2507 exit:
2508 	return 0;
2509 }
2510 
2511 static void hotkey_poll_stop_sync(void)
2512 {
2513 	lockdep_assert_held(&hotkey_mutex);
2514 
2515 	if (tpacpi_hotkey_task) {
2516 		kthread_stop(tpacpi_hotkey_task);
2517 		tpacpi_hotkey_task = NULL;
2518 	}
2519 }
2520 
2521 static void hotkey_poll_setup(const bool may_warn)
2522 {
2523 	const u32 poll_driver_mask = hotkey_driver_mask & hotkey_source_mask;
2524 	const u32 poll_user_mask = hotkey_user_mask & hotkey_source_mask;
2525 
2526 	lockdep_assert_held(&hotkey_mutex);
2527 
2528 	if (hotkey_poll_freq > 0 &&
2529 	    (poll_driver_mask ||
2530 	     (poll_user_mask && tpacpi_inputdev->users > 0))) {
2531 		if (!tpacpi_hotkey_task) {
2532 			tpacpi_hotkey_task = kthread_run(hotkey_kthread,
2533 					NULL, TPACPI_NVRAM_KTHREAD_NAME);
2534 			if (IS_ERR(tpacpi_hotkey_task)) {
2535 				tpacpi_hotkey_task = NULL;
2536 				pr_err("could not create kernel thread for hotkey polling\n");
2537 			}
2538 		}
2539 	} else {
2540 		hotkey_poll_stop_sync();
2541 		if (may_warn && (poll_driver_mask || poll_user_mask) &&
2542 		    hotkey_poll_freq == 0) {
2543 			pr_notice("hot keys 0x%08x and/or events 0x%08x require polling, which is currently disabled\n",
2544 				  poll_user_mask, poll_driver_mask);
2545 		}
2546 	}
2547 }
2548 
2549 static void hotkey_poll_setup_safe(const bool may_warn)
2550 {
2551 	mutex_lock(&hotkey_mutex);
2552 	hotkey_poll_setup(may_warn);
2553 	mutex_unlock(&hotkey_mutex);
2554 }
2555 
2556 static void hotkey_poll_set_freq(unsigned int freq)
2557 {
2558 	lockdep_assert_held(&hotkey_mutex);
2559 
2560 	if (!freq)
2561 		hotkey_poll_stop_sync();
2562 
2563 	hotkey_poll_freq = freq;
2564 }
2565 
2566 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2567 
2568 static void hotkey_poll_setup(const bool __unused)
2569 {
2570 }
2571 
2572 static void hotkey_poll_setup_safe(const bool __unused)
2573 {
2574 }
2575 
2576 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2577 
2578 static int hotkey_inputdev_open(struct input_dev *dev)
2579 {
2580 	switch (tpacpi_lifecycle) {
2581 	case TPACPI_LIFE_INIT:
2582 	case TPACPI_LIFE_RUNNING:
2583 		hotkey_poll_setup_safe(false);
2584 		return 0;
2585 	case TPACPI_LIFE_EXITING:
2586 		return -EBUSY;
2587 	}
2588 
2589 	/* Should only happen if tpacpi_lifecycle is corrupt */
2590 	BUG();
2591 	return -EBUSY;
2592 }
2593 
2594 static void hotkey_inputdev_close(struct input_dev *dev)
2595 {
2596 	/* disable hotkey polling when possible */
2597 	if (tpacpi_lifecycle != TPACPI_LIFE_EXITING &&
2598 	    !(hotkey_source_mask & hotkey_driver_mask))
2599 		hotkey_poll_setup_safe(false);
2600 }
2601 
2602 /* sysfs hotkey enable ------------------------------------------------- */
2603 static ssize_t hotkey_enable_show(struct device *dev,
2604 			   struct device_attribute *attr,
2605 			   char *buf)
2606 {
2607 	int res, status;
2608 
2609 	printk_deprecated_attribute("hotkey_enable",
2610 			"Hotkey reporting is always enabled");
2611 
2612 	res = hotkey_status_get(&status);
2613 	if (res)
2614 		return res;
2615 
2616 	return sysfs_emit(buf, "%d\n", status);
2617 }
2618 
2619 static ssize_t hotkey_enable_store(struct device *dev,
2620 			    struct device_attribute *attr,
2621 			    const char *buf, size_t count)
2622 {
2623 	unsigned long t;
2624 
2625 	printk_deprecated_attribute("hotkey_enable",
2626 			"Hotkeys can be disabled through hotkey_mask");
2627 
2628 	if (parse_strtoul(buf, 1, &t))
2629 		return -EINVAL;
2630 
2631 	if (t == 0)
2632 		return -EPERM;
2633 
2634 	return count;
2635 }
2636 
2637 static DEVICE_ATTR_RW(hotkey_enable);
2638 
2639 /* sysfs hotkey mask --------------------------------------------------- */
2640 static ssize_t hotkey_mask_show(struct device *dev,
2641 			   struct device_attribute *attr,
2642 			   char *buf)
2643 {
2644 	return sysfs_emit(buf, "0x%08x\n", hotkey_user_mask);
2645 }
2646 
2647 static ssize_t hotkey_mask_store(struct device *dev,
2648 			    struct device_attribute *attr,
2649 			    const char *buf, size_t count)
2650 {
2651 	unsigned long t;
2652 	int res;
2653 
2654 	if (parse_strtoul(buf, 0xffffffffUL, &t))
2655 		return -EINVAL;
2656 
2657 	if (mutex_lock_killable(&hotkey_mutex))
2658 		return -ERESTARTSYS;
2659 
2660 	res = hotkey_user_mask_set(t);
2661 
2662 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2663 	hotkey_poll_setup(true);
2664 #endif
2665 
2666 	mutex_unlock(&hotkey_mutex);
2667 
2668 	tpacpi_disclose_usertask("hotkey_mask", "set to 0x%08lx\n", t);
2669 
2670 	return (res) ? res : count;
2671 }
2672 
2673 static DEVICE_ATTR_RW(hotkey_mask);
2674 
2675 /* sysfs hotkey bios_enabled ------------------------------------------- */
2676 static ssize_t hotkey_bios_enabled_show(struct device *dev,
2677 			   struct device_attribute *attr,
2678 			   char *buf)
2679 {
2680 	return sprintf(buf, "0\n");
2681 }
2682 
2683 static DEVICE_ATTR_RO(hotkey_bios_enabled);
2684 
2685 /* sysfs hotkey bios_mask ---------------------------------------------- */
2686 static ssize_t hotkey_bios_mask_show(struct device *dev,
2687 			   struct device_attribute *attr,
2688 			   char *buf)
2689 {
2690 	printk_deprecated_attribute("hotkey_bios_mask",
2691 			"This attribute is useless.");
2692 	return sysfs_emit(buf, "0x%08x\n", hotkey_orig_mask);
2693 }
2694 
2695 static DEVICE_ATTR_RO(hotkey_bios_mask);
2696 
2697 /* sysfs hotkey all_mask ----------------------------------------------- */
2698 static ssize_t hotkey_all_mask_show(struct device *dev,
2699 			   struct device_attribute *attr,
2700 			   char *buf)
2701 {
2702 	return sysfs_emit(buf, "0x%08x\n",
2703 				hotkey_all_mask | hotkey_source_mask);
2704 }
2705 
2706 static DEVICE_ATTR_RO(hotkey_all_mask);
2707 
2708 /* sysfs hotkey all_mask ----------------------------------------------- */
2709 static ssize_t hotkey_adaptive_all_mask_show(struct device *dev,
2710 			   struct device_attribute *attr,
2711 			   char *buf)
2712 {
2713 	return sysfs_emit(buf, "0x%08x\n",
2714 			hotkey_adaptive_all_mask | hotkey_source_mask);
2715 }
2716 
2717 static DEVICE_ATTR_RO(hotkey_adaptive_all_mask);
2718 
2719 /* sysfs hotkey recommended_mask --------------------------------------- */
2720 static ssize_t hotkey_recommended_mask_show(struct device *dev,
2721 					    struct device_attribute *attr,
2722 					    char *buf)
2723 {
2724 	return sysfs_emit(buf, "0x%08x\n",
2725 			(hotkey_all_mask | hotkey_source_mask)
2726 			& ~hotkey_reserved_mask);
2727 }
2728 
2729 static DEVICE_ATTR_RO(hotkey_recommended_mask);
2730 
2731 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2732 
2733 /* sysfs hotkey hotkey_source_mask ------------------------------------- */
2734 static ssize_t hotkey_source_mask_show(struct device *dev,
2735 			   struct device_attribute *attr,
2736 			   char *buf)
2737 {
2738 	return sysfs_emit(buf, "0x%08x\n", hotkey_source_mask);
2739 }
2740 
2741 static ssize_t hotkey_source_mask_store(struct device *dev,
2742 			    struct device_attribute *attr,
2743 			    const char *buf, size_t count)
2744 {
2745 	unsigned long t;
2746 	u32 r_ev;
2747 	int rc;
2748 
2749 	if (parse_strtoul(buf, 0xffffffffUL, &t) ||
2750 		((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0))
2751 		return -EINVAL;
2752 
2753 	if (mutex_lock_killable(&hotkey_mutex))
2754 		return -ERESTARTSYS;
2755 
2756 	HOTKEY_CONFIG_CRITICAL_START
2757 	hotkey_source_mask = t;
2758 	HOTKEY_CONFIG_CRITICAL_END
2759 
2760 	rc = hotkey_mask_set((hotkey_user_mask | hotkey_driver_mask) &
2761 			~hotkey_source_mask);
2762 	hotkey_poll_setup(true);
2763 
2764 	/* check if events needed by the driver got disabled */
2765 	r_ev = hotkey_driver_mask & ~(hotkey_acpi_mask & hotkey_all_mask)
2766 		& ~hotkey_source_mask & TPACPI_HKEY_NVRAM_KNOWN_MASK;
2767 
2768 	mutex_unlock(&hotkey_mutex);
2769 
2770 	if (rc < 0)
2771 		pr_err("hotkey_source_mask: failed to update the firmware event mask!\n");
2772 
2773 	if (r_ev)
2774 		pr_notice("hotkey_source_mask: some important events were disabled: 0x%04x\n",
2775 			  r_ev);
2776 
2777 	tpacpi_disclose_usertask("hotkey_source_mask", "set to 0x%08lx\n", t);
2778 
2779 	return (rc < 0) ? rc : count;
2780 }
2781 
2782 static DEVICE_ATTR_RW(hotkey_source_mask);
2783 
2784 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */
2785 static ssize_t hotkey_poll_freq_show(struct device *dev,
2786 			   struct device_attribute *attr,
2787 			   char *buf)
2788 {
2789 	return sysfs_emit(buf, "%d\n", hotkey_poll_freq);
2790 }
2791 
2792 static ssize_t hotkey_poll_freq_store(struct device *dev,
2793 			    struct device_attribute *attr,
2794 			    const char *buf, size_t count)
2795 {
2796 	unsigned long t;
2797 
2798 	if (parse_strtoul(buf, 25, &t))
2799 		return -EINVAL;
2800 
2801 	if (mutex_lock_killable(&hotkey_mutex))
2802 		return -ERESTARTSYS;
2803 
2804 	hotkey_poll_set_freq(t);
2805 	hotkey_poll_setup(true);
2806 
2807 	mutex_unlock(&hotkey_mutex);
2808 
2809 	tpacpi_disclose_usertask("hotkey_poll_freq", "set to %lu\n", t);
2810 
2811 	return count;
2812 }
2813 
2814 static DEVICE_ATTR_RW(hotkey_poll_freq);
2815 
2816 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2817 
2818 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */
2819 static ssize_t hotkey_radio_sw_show(struct device *dev,
2820 			   struct device_attribute *attr,
2821 			   char *buf)
2822 {
2823 	int res;
2824 	res = hotkey_get_wlsw();
2825 	if (res < 0)
2826 		return res;
2827 
2828 	/* Opportunistic update */
2829 	tpacpi_rfk_update_hwblock_state((res == TPACPI_RFK_RADIO_OFF));
2830 
2831 	return sysfs_emit(buf, "%d\n",
2832 			(res == TPACPI_RFK_RADIO_OFF) ? 0 : 1);
2833 }
2834 
2835 static DEVICE_ATTR_RO(hotkey_radio_sw);
2836 
2837 static void hotkey_radio_sw_notify_change(void)
2838 {
2839 	if (tp_features.hotkey_wlsw)
2840 		sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2841 			     "hotkey_radio_sw");
2842 }
2843 
2844 /* sysfs hotkey tablet mode (pollable) --------------------------------- */
2845 static ssize_t hotkey_tablet_mode_show(struct device *dev,
2846 			   struct device_attribute *attr,
2847 			   char *buf)
2848 {
2849 	int res, s;
2850 	res = hotkey_get_tablet_mode(&s);
2851 	if (res < 0)
2852 		return res;
2853 
2854 	return sysfs_emit(buf, "%d\n", !!s);
2855 }
2856 
2857 static DEVICE_ATTR_RO(hotkey_tablet_mode);
2858 
2859 static void hotkey_tablet_mode_notify_change(void)
2860 {
2861 	if (tp_features.hotkey_tablet)
2862 		sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2863 			     "hotkey_tablet_mode");
2864 }
2865 
2866 /* sysfs wakeup reason (pollable) -------------------------------------- */
2867 static ssize_t hotkey_wakeup_reason_show(struct device *dev,
2868 			   struct device_attribute *attr,
2869 			   char *buf)
2870 {
2871 	return sysfs_emit(buf, "%d\n", hotkey_wakeup_reason);
2872 }
2873 
2874 static DEVICE_ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL);
2875 
2876 static void hotkey_wakeup_reason_notify_change(void)
2877 {
2878 	sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2879 		     "wakeup_reason");
2880 }
2881 
2882 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */
2883 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev,
2884 			   struct device_attribute *attr,
2885 			   char *buf)
2886 {
2887 	return sysfs_emit(buf, "%d\n", hotkey_autosleep_ack);
2888 }
2889 
2890 static DEVICE_ATTR(wakeup_hotunplug_complete, S_IRUGO,
2891 		   hotkey_wakeup_hotunplug_complete_show, NULL);
2892 
2893 static void hotkey_wakeup_hotunplug_complete_notify_change(void)
2894 {
2895 	sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2896 		     "wakeup_hotunplug_complete");
2897 }
2898 
2899 /* sysfs adaptive kbd mode --------------------------------------------- */
2900 
2901 static int adaptive_keyboard_get_mode(void);
2902 static int adaptive_keyboard_set_mode(int new_mode);
2903 
2904 enum ADAPTIVE_KEY_MODE {
2905 	HOME_MODE,
2906 	WEB_BROWSER_MODE,
2907 	WEB_CONFERENCE_MODE,
2908 	FUNCTION_MODE,
2909 	LAYFLAT_MODE
2910 };
2911 
2912 static ssize_t adaptive_kbd_mode_show(struct device *dev,
2913 			   struct device_attribute *attr,
2914 			   char *buf)
2915 {
2916 	int current_mode;
2917 
2918 	current_mode = adaptive_keyboard_get_mode();
2919 	if (current_mode < 0)
2920 		return current_mode;
2921 
2922 	return sysfs_emit(buf, "%d\n", current_mode);
2923 }
2924 
2925 static ssize_t adaptive_kbd_mode_store(struct device *dev,
2926 			    struct device_attribute *attr,
2927 			    const char *buf, size_t count)
2928 {
2929 	unsigned long t;
2930 	int res;
2931 
2932 	if (parse_strtoul(buf, LAYFLAT_MODE, &t))
2933 		return -EINVAL;
2934 
2935 	res = adaptive_keyboard_set_mode(t);
2936 	return (res < 0) ? res : count;
2937 }
2938 
2939 static DEVICE_ATTR_RW(adaptive_kbd_mode);
2940 
2941 static struct attribute *adaptive_kbd_attributes[] = {
2942 	&dev_attr_adaptive_kbd_mode.attr,
2943 	NULL
2944 };
2945 
2946 static umode_t hadaptive_kbd_attr_is_visible(struct kobject *kobj,
2947 					     struct attribute *attr, int n)
2948 {
2949 	return tp_features.has_adaptive_kbd ? attr->mode : 0;
2950 }
2951 
2952 static const struct attribute_group adaptive_kbd_attr_group = {
2953 	.is_visible = hadaptive_kbd_attr_is_visible,
2954 	.attrs = adaptive_kbd_attributes,
2955 };
2956 
2957 /* --------------------------------------------------------------------- */
2958 
2959 static struct attribute *hotkey_attributes[] = {
2960 	&dev_attr_hotkey_enable.attr,
2961 	&dev_attr_hotkey_bios_enabled.attr,
2962 	&dev_attr_hotkey_bios_mask.attr,
2963 	&dev_attr_wakeup_reason.attr,
2964 	&dev_attr_wakeup_hotunplug_complete.attr,
2965 	&dev_attr_hotkey_mask.attr,
2966 	&dev_attr_hotkey_all_mask.attr,
2967 	&dev_attr_hotkey_adaptive_all_mask.attr,
2968 	&dev_attr_hotkey_recommended_mask.attr,
2969 	&dev_attr_hotkey_tablet_mode.attr,
2970 	&dev_attr_hotkey_radio_sw.attr,
2971 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2972 	&dev_attr_hotkey_source_mask.attr,
2973 	&dev_attr_hotkey_poll_freq.attr,
2974 #endif
2975 	NULL
2976 };
2977 
2978 static umode_t hotkey_attr_is_visible(struct kobject *kobj,
2979 				      struct attribute *attr, int n)
2980 {
2981 	if (attr == &dev_attr_hotkey_tablet_mode.attr) {
2982 		if (!tp_features.hotkey_tablet)
2983 			return 0;
2984 	} else if (attr == &dev_attr_hotkey_radio_sw.attr) {
2985 		if (!tp_features.hotkey_wlsw)
2986 			return 0;
2987 	}
2988 
2989 	return attr->mode;
2990 }
2991 
2992 static const struct attribute_group hotkey_attr_group = {
2993 	.is_visible = hotkey_attr_is_visible,
2994 	.attrs = hotkey_attributes,
2995 };
2996 
2997 /*
2998  * Sync both the hw and sw blocking state of all switches
2999  */
3000 static void tpacpi_send_radiosw_update(void)
3001 {
3002 	int wlsw;
3003 
3004 	/*
3005 	 * We must sync all rfkill controllers *before* issuing any
3006 	 * rfkill input events, or we will race the rfkill core input
3007 	 * handler.
3008 	 *
3009 	 * tpacpi_inputdev_send_mutex works as a synchronization point
3010 	 * for the above.
3011 	 *
3012 	 * We optimize to avoid numerous calls to hotkey_get_wlsw.
3013 	 */
3014 
3015 	wlsw = hotkey_get_wlsw();
3016 
3017 	/* Sync hw blocking state first if it is hw-blocked */
3018 	if (wlsw == TPACPI_RFK_RADIO_OFF)
3019 		tpacpi_rfk_update_hwblock_state(true);
3020 
3021 	/* Sync hw blocking state last if it is hw-unblocked */
3022 	if (wlsw == TPACPI_RFK_RADIO_ON)
3023 		tpacpi_rfk_update_hwblock_state(false);
3024 
3025 	/* Issue rfkill input event for WLSW switch */
3026 	if (!(wlsw < 0)) {
3027 		mutex_lock(&tpacpi_inputdev_send_mutex);
3028 
3029 		input_report_switch(tpacpi_inputdev,
3030 				    SW_RFKILL_ALL, (wlsw > 0));
3031 		input_sync(tpacpi_inputdev);
3032 
3033 		mutex_unlock(&tpacpi_inputdev_send_mutex);
3034 	}
3035 
3036 	/*
3037 	 * this can be unconditional, as we will poll state again
3038 	 * if userspace uses the notify to read data
3039 	 */
3040 	hotkey_radio_sw_notify_change();
3041 }
3042 
3043 static void hotkey_exit(void)
3044 {
3045 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3046 	mutex_lock(&hotkey_mutex);
3047 	hotkey_poll_stop_sync();
3048 	mutex_unlock(&hotkey_mutex);
3049 #endif
3050 	dbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_HKEY,
3051 		   "restoring original HKEY status and mask\n");
3052 	/* yes, there is a bitwise or below, we want the
3053 	 * functions to be called even if one of them fail */
3054 	if (((tp_features.hotkey_mask &&
3055 	      hotkey_mask_set(hotkey_orig_mask)) |
3056 	     hotkey_status_set(false)) != 0)
3057 		pr_err("failed to restore hot key mask to BIOS defaults\n");
3058 }
3059 
3060 static void __init hotkey_unmap(const unsigned int scancode)
3061 {
3062 	if (hotkey_keycode_map[scancode] != KEY_RESERVED) {
3063 		clear_bit(hotkey_keycode_map[scancode],
3064 			  tpacpi_inputdev->keybit);
3065 		hotkey_keycode_map[scancode] = KEY_RESERVED;
3066 	}
3067 }
3068 
3069 /*
3070  * HKEY quirks:
3071  *   TPACPI_HK_Q_INIMASK:	Supports FN+F3,FN+F4,FN+F12
3072  */
3073 
3074 #define	TPACPI_HK_Q_INIMASK	0x0001
3075 
3076 static const struct tpacpi_quirk tpacpi_hotkey_qtable[] __initconst = {
3077 	TPACPI_Q_IBM('I', 'H', TPACPI_HK_Q_INIMASK), /* 600E */
3078 	TPACPI_Q_IBM('I', 'N', TPACPI_HK_Q_INIMASK), /* 600E */
3079 	TPACPI_Q_IBM('I', 'D', TPACPI_HK_Q_INIMASK), /* 770, 770E, 770ED */
3080 	TPACPI_Q_IBM('I', 'W', TPACPI_HK_Q_INIMASK), /* A20m */
3081 	TPACPI_Q_IBM('I', 'V', TPACPI_HK_Q_INIMASK), /* A20p */
3082 	TPACPI_Q_IBM('1', '0', TPACPI_HK_Q_INIMASK), /* A21e, A22e */
3083 	TPACPI_Q_IBM('K', 'U', TPACPI_HK_Q_INIMASK), /* A21e */
3084 	TPACPI_Q_IBM('K', 'X', TPACPI_HK_Q_INIMASK), /* A21m, A22m */
3085 	TPACPI_Q_IBM('K', 'Y', TPACPI_HK_Q_INIMASK), /* A21p, A22p */
3086 	TPACPI_Q_IBM('1', 'B', TPACPI_HK_Q_INIMASK), /* A22e */
3087 	TPACPI_Q_IBM('1', '3', TPACPI_HK_Q_INIMASK), /* A22m */
3088 	TPACPI_Q_IBM('1', 'E', TPACPI_HK_Q_INIMASK), /* A30/p (0) */
3089 	TPACPI_Q_IBM('1', 'C', TPACPI_HK_Q_INIMASK), /* R30 */
3090 	TPACPI_Q_IBM('1', 'F', TPACPI_HK_Q_INIMASK), /* R31 */
3091 	TPACPI_Q_IBM('I', 'Y', TPACPI_HK_Q_INIMASK), /* T20 */
3092 	TPACPI_Q_IBM('K', 'Z', TPACPI_HK_Q_INIMASK), /* T21 */
3093 	TPACPI_Q_IBM('1', '6', TPACPI_HK_Q_INIMASK), /* T22 */
3094 	TPACPI_Q_IBM('I', 'Z', TPACPI_HK_Q_INIMASK), /* X20, X21 */
3095 	TPACPI_Q_IBM('1', 'D', TPACPI_HK_Q_INIMASK), /* X22, X23, X24 */
3096 };
3097 
3098 typedef u16 tpacpi_keymap_entry_t;
3099 typedef tpacpi_keymap_entry_t tpacpi_keymap_t[TPACPI_HOTKEY_MAP_LEN];
3100 
3101 static int hotkey_init_tablet_mode(void)
3102 {
3103 	int in_tablet_mode = 0, res;
3104 	char *type = NULL;
3105 
3106 	if (acpi_evalf(hkey_handle, &res, "GMMS", "qdd", 0)) {
3107 		int has_tablet_mode;
3108 
3109 		in_tablet_mode = hotkey_gmms_get_tablet_mode(res,
3110 							     &has_tablet_mode);
3111 		/*
3112 		 * The Yoga 11e series has 2 accelerometers described by a
3113 		 * BOSC0200 ACPI node. This setup relies on a Windows service
3114 		 * which calls special ACPI methods on this node to report
3115 		 * the laptop/tent/tablet mode to the EC. The bmc150 iio driver
3116 		 * does not support this, so skip the hotkey on these models.
3117 		 */
3118 		if (has_tablet_mode && !dual_accel_detect())
3119 			tp_features.hotkey_tablet = TP_HOTKEY_TABLET_USES_GMMS;
3120 		type = "GMMS";
3121 	} else if (acpi_evalf(hkey_handle, &res, "MHKG", "qd")) {
3122 		/* For X41t, X60t, X61t Tablets... */
3123 		tp_features.hotkey_tablet = TP_HOTKEY_TABLET_USES_MHKG;
3124 		in_tablet_mode = !!(res & TP_HOTKEY_TABLET_MASK);
3125 		type = "MHKG";
3126 	}
3127 
3128 	if (!tp_features.hotkey_tablet)
3129 		return 0;
3130 
3131 	pr_info("Tablet mode switch found (type: %s), currently in %s mode\n",
3132 		type, in_tablet_mode ? "tablet" : "laptop");
3133 
3134 	return in_tablet_mode;
3135 }
3136 
3137 static int __init hotkey_init(struct ibm_init_struct *iibm)
3138 {
3139 	/* Requirements for changing the default keymaps:
3140 	 *
3141 	 * 1. Many of the keys are mapped to KEY_RESERVED for very
3142 	 *    good reasons.  Do not change them unless you have deep
3143 	 *    knowledge on the IBM and Lenovo ThinkPad firmware for
3144 	 *    the various ThinkPad models.  The driver behaves
3145 	 *    differently for KEY_RESERVED: such keys have their
3146 	 *    hot key mask *unset* in mask_recommended, and also
3147 	 *    in the initial hot key mask programmed into the
3148 	 *    firmware at driver load time, which means the firm-
3149 	 *    ware may react very differently if you change them to
3150 	 *    something else;
3151 	 *
3152 	 * 2. You must be subscribed to the linux-thinkpad and
3153 	 *    ibm-acpi-devel mailing lists, and you should read the
3154 	 *    list archives since 2007 if you want to change the
3155 	 *    keymaps.  This requirement exists so that you will
3156 	 *    know the past history of problems with the thinkpad-
3157 	 *    acpi driver keymaps, and also that you will be
3158 	 *    listening to any bug reports;
3159 	 *
3160 	 * 3. Do not send thinkpad-acpi specific patches directly to
3161 	 *    for merging, *ever*.  Send them to the linux-acpi
3162 	 *    mailinglist for comments.  Merging is to be done only
3163 	 *    through acpi-test and the ACPI maintainer.
3164 	 *
3165 	 * If the above is too much to ask, don't change the keymap.
3166 	 * Ask the thinkpad-acpi maintainer to do it, instead.
3167 	 */
3168 
3169 	enum keymap_index {
3170 		TPACPI_KEYMAP_IBM_GENERIC = 0,
3171 		TPACPI_KEYMAP_LENOVO_GENERIC,
3172 	};
3173 
3174 	static const tpacpi_keymap_t tpacpi_keymaps[] __initconst = {
3175 	/* Generic keymap for IBM ThinkPads */
3176 	[TPACPI_KEYMAP_IBM_GENERIC] = {
3177 		/* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
3178 		KEY_FN_F1,	KEY_BATTERY,	KEY_COFFEE,	KEY_SLEEP,
3179 		KEY_WLAN,	KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
3180 		KEY_FN_F9,	KEY_FN_F10,	KEY_FN_F11,	KEY_SUSPEND,
3181 
3182 		/* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
3183 		KEY_UNKNOWN,	/* 0x0C: FN+BACKSPACE */
3184 		KEY_UNKNOWN,	/* 0x0D: FN+INSERT */
3185 		KEY_UNKNOWN,	/* 0x0E: FN+DELETE */
3186 
3187 		/* brightness: firmware always reacts to them */
3188 		KEY_RESERVED,	/* 0x0F: FN+HOME (brightness up) */
3189 		KEY_RESERVED,	/* 0x10: FN+END (brightness down) */
3190 
3191 		/* Thinklight: firmware always react to it */
3192 		KEY_RESERVED,	/* 0x11: FN+PGUP (thinklight toggle) */
3193 
3194 		KEY_UNKNOWN,	/* 0x12: FN+PGDOWN */
3195 		KEY_ZOOM,	/* 0x13: FN+SPACE (zoom) */
3196 
3197 		/* Volume: firmware always react to it and reprograms
3198 		 * the built-in *extra* mixer.  Never map it to control
3199 		 * another mixer by default. */
3200 		KEY_RESERVED,	/* 0x14: VOLUME UP */
3201 		KEY_RESERVED,	/* 0x15: VOLUME DOWN */
3202 		KEY_RESERVED,	/* 0x16: MUTE */
3203 
3204 		KEY_VENDOR,	/* 0x17: Thinkpad/AccessIBM/Lenovo */
3205 
3206 		/* (assignments unknown, please report if found) */
3207 		KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3208 		KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3209 
3210 		/* No assignments, only used for Adaptive keyboards. */
3211 		KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3212 		KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3213 		KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3214 		KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3215 		KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3216 
3217 		/* No assignment, used for newer Lenovo models */
3218 		KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3219 		KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3220 		KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3221 		KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3222 		KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3223 		KEY_UNKNOWN, KEY_UNKNOWN
3224 
3225 		},
3226 
3227 	/* Generic keymap for Lenovo ThinkPads */
3228 	[TPACPI_KEYMAP_LENOVO_GENERIC] = {
3229 		/* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
3230 		KEY_FN_F1,	KEY_COFFEE,	KEY_BATTERY,	KEY_SLEEP,
3231 		KEY_WLAN,	KEY_CAMERA, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
3232 		KEY_FN_F9,	KEY_FN_F10,	KEY_FN_F11,	KEY_SUSPEND,
3233 
3234 		/* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
3235 		KEY_UNKNOWN,	/* 0x0C: FN+BACKSPACE */
3236 		KEY_UNKNOWN,	/* 0x0D: FN+INSERT */
3237 		KEY_UNKNOWN,	/* 0x0E: FN+DELETE */
3238 
3239 		/* These should be enabled --only-- when ACPI video
3240 		 * is disabled (i.e. in "vendor" mode), and are handled
3241 		 * in a special way by the init code */
3242 		KEY_BRIGHTNESSUP,	/* 0x0F: FN+HOME (brightness up) */
3243 		KEY_BRIGHTNESSDOWN,	/* 0x10: FN+END (brightness down) */
3244 
3245 		KEY_RESERVED,	/* 0x11: FN+PGUP (thinklight toggle) */
3246 
3247 		KEY_UNKNOWN,	/* 0x12: FN+PGDOWN */
3248 		KEY_ZOOM,	/* 0x13: FN+SPACE (zoom) */
3249 
3250 		/* Volume: z60/z61, T60 (BIOS version?): firmware always
3251 		 * react to it and reprograms the built-in *extra* mixer.
3252 		 * Never map it to control another mixer by default.
3253 		 *
3254 		 * T60?, T61, R60?, R61: firmware and EC tries to send
3255 		 * these over the regular keyboard, so these are no-ops,
3256 		 * but there are still weird bugs re. MUTE, so do not
3257 		 * change unless you get test reports from all Lenovo
3258 		 * models.  May cause the BIOS to interfere with the
3259 		 * HDA mixer.
3260 		 */
3261 		KEY_RESERVED,	/* 0x14: VOLUME UP */
3262 		KEY_RESERVED,	/* 0x15: VOLUME DOWN */
3263 		KEY_RESERVED,	/* 0x16: MUTE */
3264 
3265 		KEY_VENDOR,	/* 0x17: Thinkpad/AccessIBM/Lenovo */
3266 
3267 		/* (assignments unknown, please report if found) */
3268 		KEY_UNKNOWN, KEY_UNKNOWN,
3269 
3270 		/*
3271 		 * The mic mute button only sends 0x1a.  It does not
3272 		 * automatically mute the mic or change the mute light.
3273 		 */
3274 		KEY_MICMUTE,	/* 0x1a: Mic mute (since ?400 or so) */
3275 
3276 		/* (assignments unknown, please report if found) */
3277 		KEY_UNKNOWN,
3278 
3279 		/* Extra keys in use since the X240 / T440 / T540 */
3280 		KEY_CONFIG, KEY_SEARCH, KEY_SCALE, KEY_FILE,
3281 
3282 		/*
3283 		 * These are the adaptive keyboard keycodes for Carbon X1 2014.
3284 		 * The first item in this list is the Mute button which is
3285 		 * emitted with 0x103 through
3286 		 * adaptive_keyboard_hotkey_notify_hotkey() when the sound
3287 		 * symbol is held.
3288 		 * We'll need to offset those by 0x20.
3289 		 */
3290 		KEY_RESERVED,        /* Mute held, 0x103 */
3291 		KEY_BRIGHTNESS_MIN,  /* Backlight off */
3292 		KEY_RESERVED,        /* Clipping tool */
3293 		KEY_RESERVED,        /* Cloud */
3294 		KEY_RESERVED,
3295 		KEY_VOICECOMMAND,    /* Voice */
3296 		KEY_RESERVED,
3297 		KEY_RESERVED,        /* Gestures */
3298 		KEY_RESERVED,
3299 		KEY_RESERVED,
3300 		KEY_RESERVED,
3301 		KEY_CONFIG,          /* Settings */
3302 		KEY_RESERVED,        /* New tab */
3303 		KEY_REFRESH,         /* Reload */
3304 		KEY_BACK,            /* Back */
3305 		KEY_RESERVED,        /* Microphone down */
3306 		KEY_RESERVED,        /* Microphone up */
3307 		KEY_RESERVED,        /* Microphone cancellation */
3308 		KEY_RESERVED,        /* Camera mode */
3309 		KEY_RESERVED,        /* Rotate display, 0x116 */
3310 
3311 		/*
3312 		 * These are found in 2017 models (e.g. T470s, X270).
3313 		 * The lowest known value is 0x311, which according to
3314 		 * the manual should launch a user defined favorite
3315 		 * application.
3316 		 *
3317 		 * The offset for these is TP_ACPI_HOTKEYSCAN_EXTENDED_START,
3318 		 * corresponding to 0x34.
3319 		 */
3320 
3321 		/* (assignments unknown, please report if found) */
3322 		KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3323 		KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3324 		KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3325 		KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3326 		KEY_UNKNOWN,
3327 
3328 		KEY_BOOKMARKS,			/* Favorite app, 0x311 */
3329 		KEY_SELECTIVE_SCREENSHOT,	/* Clipping tool */
3330 		KEY_CALC,			/* Calculator (above numpad, P52) */
3331 		KEY_BLUETOOTH,			/* Bluetooth */
3332 		KEY_KEYBOARD,			/* Keyboard, 0x315 */
3333 		KEY_FN_RIGHT_SHIFT,		/* Fn + right Shift */
3334 		KEY_NOTIFICATION_CENTER,	/* Notification Center */
3335 		KEY_PICKUP_PHONE,		/* Answer incoming call */
3336 		KEY_HANGUP_PHONE,		/* Decline incoming call */
3337 		},
3338 	};
3339 
3340 	static const struct tpacpi_quirk tpacpi_keymap_qtable[] __initconst = {
3341 		/* Generic maps (fallback) */
3342 		{
3343 		  .vendor = PCI_VENDOR_ID_IBM,
3344 		  .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
3345 		  .quirks = TPACPI_KEYMAP_IBM_GENERIC,
3346 		},
3347 		{
3348 		  .vendor = PCI_VENDOR_ID_LENOVO,
3349 		  .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
3350 		  .quirks = TPACPI_KEYMAP_LENOVO_GENERIC,
3351 		},
3352 	};
3353 
3354 #define TPACPI_HOTKEY_MAP_SIZE		sizeof(tpacpi_keymap_t)
3355 #define TPACPI_HOTKEY_MAP_TYPESIZE	sizeof(tpacpi_keymap_entry_t)
3356 
3357 	int res, i;
3358 	int status;
3359 	int hkeyv;
3360 	bool radiosw_state  = false;
3361 	bool tabletsw_state = false;
3362 
3363 	unsigned long quirks;
3364 	unsigned long keymap_id;
3365 
3366 	vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3367 			"initializing hotkey subdriver\n");
3368 
3369 	BUG_ON(!tpacpi_inputdev);
3370 	BUG_ON(tpacpi_inputdev->open != NULL ||
3371 	       tpacpi_inputdev->close != NULL);
3372 
3373 	TPACPI_ACPIHANDLE_INIT(hkey);
3374 	mutex_init(&hotkey_mutex);
3375 
3376 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3377 	mutex_init(&hotkey_thread_data_mutex);
3378 #endif
3379 
3380 	/* hotkey not supported on 570 */
3381 	tp_features.hotkey = hkey_handle != NULL;
3382 
3383 	vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3384 		"hotkeys are %s\n",
3385 		str_supported(tp_features.hotkey));
3386 
3387 	if (!tp_features.hotkey)
3388 		return -ENODEV;
3389 
3390 	quirks = tpacpi_check_quirks(tpacpi_hotkey_qtable,
3391 				     ARRAY_SIZE(tpacpi_hotkey_qtable));
3392 
3393 	tpacpi_disable_brightness_delay();
3394 
3395 	/* mask not supported on 600e/x, 770e, 770x, A21e, A2xm/p,
3396 	   A30, R30, R31, T20-22, X20-21, X22-24.  Detected by checking
3397 	   for HKEY interface version 0x100 */
3398 	if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
3399 		vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3400 			    "firmware HKEY interface version: 0x%x\n",
3401 			    hkeyv);
3402 
3403 		switch (hkeyv >> 8) {
3404 		case 1:
3405 			/*
3406 			 * MHKV 0x100 in A31, R40, R40e,
3407 			 * T4x, X31, and later
3408 			 */
3409 
3410 			/* Paranoia check AND init hotkey_all_mask */
3411 			if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
3412 					"MHKA", "qd")) {
3413 				pr_err("missing MHKA handler, please report this to %s\n",
3414 				       TPACPI_MAIL);
3415 				/* Fallback: pre-init for FN+F3,F4,F12 */
3416 				hotkey_all_mask = 0x080cU;
3417 			} else {
3418 				tp_features.hotkey_mask = 1;
3419 			}
3420 			break;
3421 
3422 		case 2:
3423 			/*
3424 			 * MHKV 0x200 in X1, T460s, X260, T560, X1 Tablet (2016)
3425 			 */
3426 
3427 			/* Paranoia check AND init hotkey_all_mask */
3428 			if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
3429 					"MHKA", "dd", 1)) {
3430 				pr_err("missing MHKA handler, please report this to %s\n",
3431 				       TPACPI_MAIL);
3432 				/* Fallback: pre-init for FN+F3,F4,F12 */
3433 				hotkey_all_mask = 0x080cU;
3434 			} else {
3435 				tp_features.hotkey_mask = 1;
3436 			}
3437 
3438 			/*
3439 			 * Check if we have an adaptive keyboard, like on the
3440 			 * Lenovo Carbon X1 2014 (2nd Gen).
3441 			 */
3442 			if (acpi_evalf(hkey_handle, &hotkey_adaptive_all_mask,
3443 				       "MHKA", "dd", 2)) {
3444 				if (hotkey_adaptive_all_mask != 0)
3445 					tp_features.has_adaptive_kbd = true;
3446 			} else {
3447 				tp_features.has_adaptive_kbd = false;
3448 				hotkey_adaptive_all_mask = 0x0U;
3449 			}
3450 			break;
3451 
3452 		default:
3453 			pr_err("unknown version of the HKEY interface: 0x%x\n",
3454 			       hkeyv);
3455 			pr_err("please report this to %s\n", TPACPI_MAIL);
3456 			break;
3457 		}
3458 	}
3459 
3460 	vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3461 		"hotkey masks are %s\n",
3462 		str_supported(tp_features.hotkey_mask));
3463 
3464 	/* Init hotkey_all_mask if not initialized yet */
3465 	if (!tp_features.hotkey_mask && !hotkey_all_mask &&
3466 	    (quirks & TPACPI_HK_Q_INIMASK))
3467 		hotkey_all_mask = 0x080cU;  /* FN+F12, FN+F4, FN+F3 */
3468 
3469 	/* Init hotkey_acpi_mask and hotkey_orig_mask */
3470 	if (tp_features.hotkey_mask) {
3471 		/* hotkey_source_mask *must* be zero for
3472 		 * the first hotkey_mask_get to return hotkey_orig_mask */
3473 		mutex_lock(&hotkey_mutex);
3474 		res = hotkey_mask_get();
3475 		mutex_unlock(&hotkey_mutex);
3476 		if (res)
3477 			return res;
3478 
3479 		hotkey_orig_mask = hotkey_acpi_mask;
3480 	} else {
3481 		hotkey_orig_mask = hotkey_all_mask;
3482 		hotkey_acpi_mask = hotkey_all_mask;
3483 	}
3484 
3485 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3486 	if (dbg_wlswemul) {
3487 		tp_features.hotkey_wlsw = 1;
3488 		radiosw_state = !!tpacpi_wlsw_emulstate;
3489 		pr_info("radio switch emulation enabled\n");
3490 	} else
3491 #endif
3492 	/* Not all thinkpads have a hardware radio switch */
3493 	if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
3494 		tp_features.hotkey_wlsw = 1;
3495 		radiosw_state = !!status;
3496 		pr_info("radio switch found; radios are %s\n", str_enabled_disabled(status & BIT(0)));
3497 	}
3498 
3499 	tabletsw_state = hotkey_init_tablet_mode();
3500 
3501 	/* Set up key map */
3502 	keymap_id = tpacpi_check_quirks(tpacpi_keymap_qtable,
3503 					ARRAY_SIZE(tpacpi_keymap_qtable));
3504 	BUG_ON(keymap_id >= ARRAY_SIZE(tpacpi_keymaps));
3505 	dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3506 		   "using keymap number %lu\n", keymap_id);
3507 
3508 	hotkey_keycode_map = kmemdup(&tpacpi_keymaps[keymap_id],
3509 			TPACPI_HOTKEY_MAP_SIZE,	GFP_KERNEL);
3510 	if (!hotkey_keycode_map) {
3511 		pr_err("failed to allocate memory for key map\n");
3512 		return -ENOMEM;
3513 	}
3514 
3515 	input_set_capability(tpacpi_inputdev, EV_MSC, MSC_SCAN);
3516 	tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
3517 	tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
3518 	tpacpi_inputdev->keycode = hotkey_keycode_map;
3519 	for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
3520 		if (hotkey_keycode_map[i] != KEY_RESERVED) {
3521 			input_set_capability(tpacpi_inputdev, EV_KEY,
3522 						hotkey_keycode_map[i]);
3523 		} else {
3524 			if (i < sizeof(hotkey_reserved_mask)*8)
3525 				hotkey_reserved_mask |= 1 << i;
3526 		}
3527 	}
3528 
3529 	if (tp_features.hotkey_wlsw) {
3530 		input_set_capability(tpacpi_inputdev, EV_SW, SW_RFKILL_ALL);
3531 		input_report_switch(tpacpi_inputdev,
3532 				    SW_RFKILL_ALL, radiosw_state);
3533 	}
3534 	if (tp_features.hotkey_tablet) {
3535 		input_set_capability(tpacpi_inputdev, EV_SW, SW_TABLET_MODE);
3536 		input_report_switch(tpacpi_inputdev,
3537 				    SW_TABLET_MODE, tabletsw_state);
3538 	}
3539 
3540 	/* Do not issue duplicate brightness change events to
3541 	 * userspace. tpacpi_detect_brightness_capabilities() must have
3542 	 * been called before this point  */
3543 	if (acpi_video_get_backlight_type() != acpi_backlight_vendor) {
3544 		pr_info("This ThinkPad has standard ACPI backlight brightness control, supported by the ACPI video driver\n");
3545 		pr_notice("Disabling thinkpad-acpi brightness events by default...\n");
3546 
3547 		/* Disable brightness up/down on Lenovo thinkpads when
3548 		 * ACPI is handling them, otherwise it is plain impossible
3549 		 * for userspace to do something even remotely sane */
3550 		hotkey_reserved_mask |=
3551 			(1 << TP_ACPI_HOTKEYSCAN_FNHOME)
3552 			| (1 << TP_ACPI_HOTKEYSCAN_FNEND);
3553 		hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNHOME);
3554 		hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNEND);
3555 	}
3556 
3557 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3558 	hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK
3559 				& ~hotkey_all_mask
3560 				& ~hotkey_reserved_mask;
3561 
3562 	vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3563 		    "hotkey source mask 0x%08x, polling freq %u\n",
3564 		    hotkey_source_mask, hotkey_poll_freq);
3565 #endif
3566 
3567 	dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3568 			"enabling firmware HKEY event interface...\n");
3569 	res = hotkey_status_set(true);
3570 	if (res) {
3571 		hotkey_exit();
3572 		return res;
3573 	}
3574 	mutex_lock(&hotkey_mutex);
3575 	res = hotkey_mask_set(((hotkey_all_mask & ~hotkey_reserved_mask)
3576 			       | hotkey_driver_mask)
3577 			      & ~hotkey_source_mask);
3578 	mutex_unlock(&hotkey_mutex);
3579 	if (res < 0 && res != -ENXIO) {
3580 		hotkey_exit();
3581 		return res;
3582 	}
3583 	hotkey_user_mask = (hotkey_acpi_mask | hotkey_source_mask)
3584 				& ~hotkey_reserved_mask;
3585 	vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3586 		"initial masks: user=0x%08x, fw=0x%08x, poll=0x%08x\n",
3587 		hotkey_user_mask, hotkey_acpi_mask, hotkey_source_mask);
3588 
3589 	tpacpi_inputdev->open = &hotkey_inputdev_open;
3590 	tpacpi_inputdev->close = &hotkey_inputdev_close;
3591 
3592 	hotkey_poll_setup_safe(true);
3593 
3594 	return 0;
3595 }
3596 
3597 /* Thinkpad X1 Carbon support 5 modes including Home mode, Web browser
3598  * mode, Web conference mode, Function mode and Lay-flat mode.
3599  * We support Home mode and Function mode currently.
3600  *
3601  * Will consider support rest of modes in future.
3602  *
3603  */
3604 static const int adaptive_keyboard_modes[] = {
3605 	HOME_MODE,
3606 /*	WEB_BROWSER_MODE = 2,
3607 	WEB_CONFERENCE_MODE = 3, */
3608 	FUNCTION_MODE
3609 };
3610 
3611 #define DFR_CHANGE_ROW			0x101
3612 #define DFR_SHOW_QUICKVIEW_ROW		0x102
3613 #define FIRST_ADAPTIVE_KEY		0x103
3614 
3615 /* press Fn key a while second, it will switch to Function Mode. Then
3616  * release Fn key, previous mode be restored.
3617  */
3618 static bool adaptive_keyboard_mode_is_saved;
3619 static int adaptive_keyboard_prev_mode;
3620 
3621 static int adaptive_keyboard_get_mode(void)
3622 {
3623 	int mode = 0;
3624 
3625 	if (!acpi_evalf(hkey_handle, &mode, "GTRW", "dd", 0)) {
3626 		pr_err("Cannot read adaptive keyboard mode\n");
3627 		return -EIO;
3628 	}
3629 
3630 	return mode;
3631 }
3632 
3633 static int adaptive_keyboard_set_mode(int new_mode)
3634 {
3635 	if (new_mode < 0 ||
3636 		new_mode > LAYFLAT_MODE)
3637 		return -EINVAL;
3638 
3639 	if (!acpi_evalf(hkey_handle, NULL, "STRW", "vd", new_mode)) {
3640 		pr_err("Cannot set adaptive keyboard mode\n");
3641 		return -EIO;
3642 	}
3643 
3644 	return 0;
3645 }
3646 
3647 static int adaptive_keyboard_get_next_mode(int mode)
3648 {
3649 	size_t i;
3650 	size_t max_mode = ARRAY_SIZE(adaptive_keyboard_modes) - 1;
3651 
3652 	for (i = 0; i <= max_mode; i++) {
3653 		if (adaptive_keyboard_modes[i] == mode)
3654 			break;
3655 	}
3656 
3657 	if (i >= max_mode)
3658 		i = 0;
3659 	else
3660 		i++;
3661 
3662 	return adaptive_keyboard_modes[i];
3663 }
3664 
3665 static bool adaptive_keyboard_hotkey_notify_hotkey(unsigned int scancode)
3666 {
3667 	int current_mode = 0;
3668 	int new_mode = 0;
3669 	int keycode;
3670 
3671 	switch (scancode) {
3672 	case DFR_CHANGE_ROW:
3673 		if (adaptive_keyboard_mode_is_saved) {
3674 			new_mode = adaptive_keyboard_prev_mode;
3675 			adaptive_keyboard_mode_is_saved = false;
3676 		} else {
3677 			current_mode = adaptive_keyboard_get_mode();
3678 			if (current_mode < 0)
3679 				return false;
3680 			new_mode = adaptive_keyboard_get_next_mode(
3681 					current_mode);
3682 		}
3683 
3684 		if (adaptive_keyboard_set_mode(new_mode) < 0)
3685 			return false;
3686 
3687 		return true;
3688 
3689 	case DFR_SHOW_QUICKVIEW_ROW:
3690 		current_mode = adaptive_keyboard_get_mode();
3691 		if (current_mode < 0)
3692 			return false;
3693 
3694 		adaptive_keyboard_prev_mode = current_mode;
3695 		adaptive_keyboard_mode_is_saved = true;
3696 
3697 		if (adaptive_keyboard_set_mode (FUNCTION_MODE) < 0)
3698 			return false;
3699 		return true;
3700 
3701 	default:
3702 		if (scancode < FIRST_ADAPTIVE_KEY ||
3703 		    scancode >= FIRST_ADAPTIVE_KEY +
3704 		    TP_ACPI_HOTKEYSCAN_EXTENDED_START -
3705 		    TP_ACPI_HOTKEYSCAN_ADAPTIVE_START) {
3706 			pr_info("Unhandled adaptive keyboard key: 0x%x\n",
3707 				scancode);
3708 			return false;
3709 		}
3710 		keycode = hotkey_keycode_map[scancode - FIRST_ADAPTIVE_KEY +
3711 					     TP_ACPI_HOTKEYSCAN_ADAPTIVE_START];
3712 		if (keycode != KEY_RESERVED) {
3713 			mutex_lock(&tpacpi_inputdev_send_mutex);
3714 
3715 			input_report_key(tpacpi_inputdev, keycode, 1);
3716 			input_sync(tpacpi_inputdev);
3717 
3718 			input_report_key(tpacpi_inputdev, keycode, 0);
3719 			input_sync(tpacpi_inputdev);
3720 
3721 			mutex_unlock(&tpacpi_inputdev_send_mutex);
3722 		}
3723 		return true;
3724 	}
3725 }
3726 
3727 static bool hotkey_notify_extended_hotkey(const u32 hkey)
3728 {
3729 	unsigned int scancode;
3730 
3731 	switch (hkey) {
3732 	case TP_HKEY_EV_PRIVACYGUARD_TOGGLE:
3733 	case TP_HKEY_EV_AMT_TOGGLE:
3734 		tpacpi_driver_event(hkey);
3735 		return true;
3736 	}
3737 
3738 	/* Extended keycodes start at 0x300 and our offset into the map
3739 	 * TP_ACPI_HOTKEYSCAN_EXTENDED_START. The calculated scancode
3740 	 * will be positive, but might not be in the correct range.
3741 	 */
3742 	scancode = (hkey & 0xfff) - (0x300 - TP_ACPI_HOTKEYSCAN_EXTENDED_START);
3743 	if (scancode >= TP_ACPI_HOTKEYSCAN_EXTENDED_START &&
3744 	    scancode < TPACPI_HOTKEY_MAP_LEN) {
3745 		tpacpi_input_send_key(scancode);
3746 		return true;
3747 	}
3748 
3749 	return false;
3750 }
3751 
3752 static bool hotkey_notify_hotkey(const u32 hkey,
3753 				 bool *send_acpi_ev,
3754 				 bool *ignore_acpi_ev)
3755 {
3756 	/* 0x1000-0x1FFF: key presses */
3757 	unsigned int scancode = hkey & 0xfff;
3758 	*send_acpi_ev = true;
3759 	*ignore_acpi_ev = false;
3760 
3761 	/*
3762 	 * Original events are in the 0x10XX range, the adaptive keyboard
3763 	 * found in 2014 X1 Carbon emits events are of 0x11XX. In 2017
3764 	 * models, additional keys are emitted through 0x13XX.
3765 	 */
3766 	switch ((hkey >> 8) & 0xf) {
3767 	case 0:
3768 		if (scancode > 0 &&
3769 		    scancode <= TP_ACPI_HOTKEYSCAN_ADAPTIVE_START) {
3770 			/* HKEY event 0x1001 is scancode 0x00 */
3771 			scancode--;
3772 			if (!(hotkey_source_mask & (1 << scancode))) {
3773 				tpacpi_input_send_key_masked(scancode);
3774 				*send_acpi_ev = false;
3775 			} else {
3776 				*ignore_acpi_ev = true;
3777 			}
3778 			return true;
3779 		}
3780 		break;
3781 
3782 	case 1:
3783 		return adaptive_keyboard_hotkey_notify_hotkey(scancode);
3784 
3785 	case 3:
3786 		return hotkey_notify_extended_hotkey(hkey);
3787 	}
3788 
3789 	return false;
3790 }
3791 
3792 static bool hotkey_notify_wakeup(const u32 hkey,
3793 				 bool *send_acpi_ev,
3794 				 bool *ignore_acpi_ev)
3795 {
3796 	/* 0x2000-0x2FFF: Wakeup reason */
3797 	*send_acpi_ev = true;
3798 	*ignore_acpi_ev = false;
3799 
3800 	switch (hkey) {
3801 	case TP_HKEY_EV_WKUP_S3_UNDOCK: /* suspend, undock */
3802 	case TP_HKEY_EV_WKUP_S4_UNDOCK: /* hibernation, undock */
3803 		hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK;
3804 		*ignore_acpi_ev = true;
3805 		break;
3806 
3807 	case TP_HKEY_EV_WKUP_S3_BAYEJ: /* suspend, bay eject */
3808 	case TP_HKEY_EV_WKUP_S4_BAYEJ: /* hibernation, bay eject */
3809 		hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ;
3810 		*ignore_acpi_ev = true;
3811 		break;
3812 
3813 	case TP_HKEY_EV_WKUP_S3_BATLOW: /* Battery on critical low level/S3 */
3814 	case TP_HKEY_EV_WKUP_S4_BATLOW: /* Battery on critical low level/S4 */
3815 		pr_alert("EMERGENCY WAKEUP: battery almost empty\n");
3816 		/* how to auto-heal: */
3817 		/* 2313: woke up from S3, go to S4/S5 */
3818 		/* 2413: woke up from S4, go to S5 */
3819 		break;
3820 
3821 	default:
3822 		return false;
3823 	}
3824 
3825 	if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) {
3826 		pr_info("woke up due to a hot-unplug request...\n");
3827 		hotkey_wakeup_reason_notify_change();
3828 	}
3829 	return true;
3830 }
3831 
3832 static bool hotkey_notify_dockevent(const u32 hkey,
3833 				 bool *send_acpi_ev,
3834 				 bool *ignore_acpi_ev)
3835 {
3836 	/* 0x4000-0x4FFF: dock-related events */
3837 	*send_acpi_ev = true;
3838 	*ignore_acpi_ev = false;
3839 
3840 	switch (hkey) {
3841 	case TP_HKEY_EV_UNDOCK_ACK:
3842 		/* ACPI undock operation completed after wakeup */
3843 		hotkey_autosleep_ack = 1;
3844 		pr_info("undocked\n");
3845 		hotkey_wakeup_hotunplug_complete_notify_change();
3846 		return true;
3847 
3848 	case TP_HKEY_EV_HOTPLUG_DOCK: /* docked to port replicator */
3849 		pr_info("docked into hotplug port replicator\n");
3850 		return true;
3851 	case TP_HKEY_EV_HOTPLUG_UNDOCK: /* undocked from port replicator */
3852 		pr_info("undocked from hotplug port replicator\n");
3853 		return true;
3854 
3855 	/*
3856 	 * Deliberately ignore attaching and detaching the keybord cover to avoid
3857 	 * duplicates from intel-vbtn, which already emits SW_TABLET_MODE events
3858 	 * to userspace.
3859 	 *
3860 	 * Please refer to the following thread for more information and a preliminary
3861 	 * implementation using the GTOP ("Get Tablet OPtions") interface that could be
3862 	 * extended to other attachment options of the ThinkPad X1 Tablet series, such as
3863 	 * the Pico cartridge dock module:
3864 	 * https://lore.kernel.org/platform-driver-x86/38cb8265-1e30-d547-9e12-b4ae290be737@a-kobel.de/
3865 	 */
3866 	case TP_HKEY_EV_KBD_COVER_ATTACH:
3867 	case TP_HKEY_EV_KBD_COVER_DETACH:
3868 		*send_acpi_ev = false;
3869 		*ignore_acpi_ev = true;
3870 		return true;
3871 
3872 	default:
3873 		return false;
3874 	}
3875 }
3876 
3877 static bool hotkey_notify_usrevent(const u32 hkey,
3878 				 bool *send_acpi_ev,
3879 				 bool *ignore_acpi_ev)
3880 {
3881 	/* 0x5000-0x5FFF: human interface helpers */
3882 	*send_acpi_ev = true;
3883 	*ignore_acpi_ev = false;
3884 
3885 	switch (hkey) {
3886 	case TP_HKEY_EV_PEN_INSERTED:  /* X61t: tablet pen inserted into bay */
3887 	case TP_HKEY_EV_PEN_REMOVED:   /* X61t: tablet pen removed from bay */
3888 		return true;
3889 
3890 	case TP_HKEY_EV_TABLET_TABLET:   /* X41t-X61t: tablet mode */
3891 	case TP_HKEY_EV_TABLET_NOTEBOOK: /* X41t-X61t: normal mode */
3892 		tpacpi_input_send_tabletsw();
3893 		hotkey_tablet_mode_notify_change();
3894 		*send_acpi_ev = false;
3895 		return true;
3896 
3897 	case TP_HKEY_EV_LID_CLOSE:	/* Lid closed */
3898 	case TP_HKEY_EV_LID_OPEN:	/* Lid opened */
3899 	case TP_HKEY_EV_BRGHT_CHANGED:	/* brightness changed */
3900 		/* do not propagate these events */
3901 		*ignore_acpi_ev = true;
3902 		return true;
3903 
3904 	default:
3905 		return false;
3906 	}
3907 }
3908 
3909 static void thermal_dump_all_sensors(void);
3910 static void palmsensor_refresh(void);
3911 
3912 static bool hotkey_notify_6xxx(const u32 hkey,
3913 				 bool *send_acpi_ev,
3914 				 bool *ignore_acpi_ev)
3915 {
3916 	/* 0x6000-0x6FFF: thermal alarms/notices and keyboard events */
3917 	*send_acpi_ev = true;
3918 	*ignore_acpi_ev = false;
3919 
3920 	switch (hkey) {
3921 	case TP_HKEY_EV_THM_TABLE_CHANGED:
3922 		pr_debug("EC reports: Thermal Table has changed\n");
3923 		/* recommended action: do nothing, we don't have
3924 		 * Lenovo ATM information */
3925 		return true;
3926 	case TP_HKEY_EV_THM_CSM_COMPLETED:
3927 		pr_debug("EC reports: Thermal Control Command set completed (DYTC)\n");
3928 		/* Thermal event - pass on to event handler */
3929 		tpacpi_driver_event(hkey);
3930 		return true;
3931 	case TP_HKEY_EV_THM_TRANSFM_CHANGED:
3932 		pr_debug("EC reports: Thermal Transformation changed (GMTS)\n");
3933 		/* recommended action: do nothing, we don't have
3934 		 * Lenovo ATM information */
3935 		return true;
3936 	case TP_HKEY_EV_ALARM_BAT_HOT:
3937 		pr_crit("THERMAL ALARM: battery is too hot!\n");
3938 		/* recommended action: warn user through gui */
3939 		break;
3940 	case TP_HKEY_EV_ALARM_BAT_XHOT:
3941 		pr_alert("THERMAL EMERGENCY: battery is extremely hot!\n");
3942 		/* recommended action: immediate sleep/hibernate */
3943 		break;
3944 	case TP_HKEY_EV_ALARM_SENSOR_HOT:
3945 		pr_crit("THERMAL ALARM: a sensor reports something is too hot!\n");
3946 		/* recommended action: warn user through gui, that */
3947 		/* some internal component is too hot */
3948 		break;
3949 	case TP_HKEY_EV_ALARM_SENSOR_XHOT:
3950 		pr_alert("THERMAL EMERGENCY: a sensor reports something is extremely hot!\n");
3951 		/* recommended action: immediate sleep/hibernate */
3952 		break;
3953 	case TP_HKEY_EV_AC_CHANGED:
3954 		/* X120e, X121e, X220, X220i, X220t, X230, T420, T420s, W520:
3955 		 * AC status changed; can be triggered by plugging or
3956 		 * unplugging AC adapter, docking or undocking. */
3957 
3958 		fallthrough;
3959 
3960 	case TP_HKEY_EV_KEY_NUMLOCK:
3961 	case TP_HKEY_EV_KEY_FN:
3962 		/* key press events, we just ignore them as long as the EC
3963 		 * is still reporting them in the normal keyboard stream */
3964 		*send_acpi_ev = false;
3965 		*ignore_acpi_ev = true;
3966 		return true;
3967 
3968 	case TP_HKEY_EV_KEY_FN_ESC:
3969 		/* Get the media key status to force the status LED to update */
3970 		acpi_evalf(hkey_handle, NULL, "GMKS", "v");
3971 		*send_acpi_ev = false;
3972 		*ignore_acpi_ev = true;
3973 		return true;
3974 
3975 	case TP_HKEY_EV_TABLET_CHANGED:
3976 		tpacpi_input_send_tabletsw();
3977 		hotkey_tablet_mode_notify_change();
3978 		*send_acpi_ev = false;
3979 		return true;
3980 
3981 	case TP_HKEY_EV_PALM_DETECTED:
3982 	case TP_HKEY_EV_PALM_UNDETECTED:
3983 		/* palm detected  - pass on to event handler */
3984 		palmsensor_refresh();
3985 		return true;
3986 
3987 	default:
3988 		/* report simply as unknown, no sensor dump */
3989 		return false;
3990 	}
3991 
3992 	thermal_dump_all_sensors();
3993 	return true;
3994 }
3995 
3996 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
3997 {
3998 	u32 hkey;
3999 	bool send_acpi_ev;
4000 	bool ignore_acpi_ev;
4001 	bool known_ev;
4002 
4003 	if (event != 0x80) {
4004 		pr_err("unknown HKEY notification event %d\n", event);
4005 		/* forward it to userspace, maybe it knows how to handle it */
4006 		acpi_bus_generate_netlink_event(
4007 					ibm->acpi->device->pnp.device_class,
4008 					dev_name(&ibm->acpi->device->dev),
4009 					event, 0);
4010 		return;
4011 	}
4012 
4013 	while (1) {
4014 		if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
4015 			pr_err("failed to retrieve HKEY event\n");
4016 			return;
4017 		}
4018 
4019 		if (hkey == 0) {
4020 			/* queue empty */
4021 			return;
4022 		}
4023 
4024 		send_acpi_ev = true;
4025 		ignore_acpi_ev = false;
4026 
4027 		switch (hkey >> 12) {
4028 		case 1:
4029 			/* 0x1000-0x1FFF: key presses */
4030 			known_ev = hotkey_notify_hotkey(hkey, &send_acpi_ev,
4031 						 &ignore_acpi_ev);
4032 			break;
4033 		case 2:
4034 			/* 0x2000-0x2FFF: Wakeup reason */
4035 			known_ev = hotkey_notify_wakeup(hkey, &send_acpi_ev,
4036 						 &ignore_acpi_ev);
4037 			break;
4038 		case 3:
4039 			/* 0x3000-0x3FFF: bay-related wakeups */
4040 			switch (hkey) {
4041 			case TP_HKEY_EV_BAYEJ_ACK:
4042 				hotkey_autosleep_ack = 1;
4043 				pr_info("bay ejected\n");
4044 				hotkey_wakeup_hotunplug_complete_notify_change();
4045 				known_ev = true;
4046 				break;
4047 			case TP_HKEY_EV_OPTDRV_EJ:
4048 				/* FIXME: kick libata if SATA link offline */
4049 				known_ev = true;
4050 				break;
4051 			default:
4052 				known_ev = false;
4053 			}
4054 			break;
4055 		case 4:
4056 			/* 0x4000-0x4FFF: dock-related events */
4057 			known_ev = hotkey_notify_dockevent(hkey, &send_acpi_ev,
4058 						&ignore_acpi_ev);
4059 			break;
4060 		case 5:
4061 			/* 0x5000-0x5FFF: human interface helpers */
4062 			known_ev = hotkey_notify_usrevent(hkey, &send_acpi_ev,
4063 						 &ignore_acpi_ev);
4064 			break;
4065 		case 6:
4066 			/* 0x6000-0x6FFF: thermal alarms/notices and
4067 			 *                keyboard events */
4068 			known_ev = hotkey_notify_6xxx(hkey, &send_acpi_ev,
4069 						 &ignore_acpi_ev);
4070 			break;
4071 		case 7:
4072 			/* 0x7000-0x7FFF: misc */
4073 			if (tp_features.hotkey_wlsw &&
4074 					hkey == TP_HKEY_EV_RFKILL_CHANGED) {
4075 				tpacpi_send_radiosw_update();
4076 				send_acpi_ev = 0;
4077 				known_ev = true;
4078 				break;
4079 			}
4080 			fallthrough;	/* to default */
4081 		default:
4082 			known_ev = false;
4083 		}
4084 		if (!known_ev) {
4085 			pr_notice("unhandled HKEY event 0x%04x\n", hkey);
4086 			pr_notice("please report the conditions when this event happened to %s\n",
4087 				  TPACPI_MAIL);
4088 		}
4089 
4090 		/* netlink events */
4091 		if (!ignore_acpi_ev && send_acpi_ev) {
4092 			acpi_bus_generate_netlink_event(
4093 					ibm->acpi->device->pnp.device_class,
4094 					dev_name(&ibm->acpi->device->dev),
4095 					event, hkey);
4096 		}
4097 	}
4098 }
4099 
4100 static void hotkey_suspend(void)
4101 {
4102 	/* Do these on suspend, we get the events on early resume! */
4103 	hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE;
4104 	hotkey_autosleep_ack = 0;
4105 
4106 	/* save previous mode of adaptive keyboard of X1 Carbon */
4107 	if (tp_features.has_adaptive_kbd) {
4108 		if (!acpi_evalf(hkey_handle, &adaptive_keyboard_prev_mode,
4109 					"GTRW", "dd", 0)) {
4110 			pr_err("Cannot read adaptive keyboard mode.\n");
4111 		}
4112 	}
4113 }
4114 
4115 static void hotkey_resume(void)
4116 {
4117 	tpacpi_disable_brightness_delay();
4118 
4119 	mutex_lock(&hotkey_mutex);
4120 	if (hotkey_status_set(true) < 0 ||
4121 	    hotkey_mask_set(hotkey_acpi_mask) < 0)
4122 		pr_err("error while attempting to reset the event firmware interface\n");
4123 	mutex_unlock(&hotkey_mutex);
4124 
4125 	tpacpi_send_radiosw_update();
4126 	tpacpi_input_send_tabletsw();
4127 	hotkey_tablet_mode_notify_change();
4128 	hotkey_wakeup_reason_notify_change();
4129 	hotkey_wakeup_hotunplug_complete_notify_change();
4130 	hotkey_poll_setup_safe(false);
4131 
4132 	/* restore previous mode of adapive keyboard of X1 Carbon */
4133 	if (tp_features.has_adaptive_kbd) {
4134 		if (!acpi_evalf(hkey_handle, NULL, "STRW", "vd",
4135 					adaptive_keyboard_prev_mode)) {
4136 			pr_err("Cannot set adaptive keyboard mode.\n");
4137 		}
4138 	}
4139 }
4140 
4141 /* procfs -------------------------------------------------------------- */
4142 static int hotkey_read(struct seq_file *m)
4143 {
4144 	int res, status;
4145 
4146 	if (!tp_features.hotkey) {
4147 		seq_printf(m, "status:\t\tnot supported\n");
4148 		return 0;
4149 	}
4150 
4151 	if (mutex_lock_killable(&hotkey_mutex))
4152 		return -ERESTARTSYS;
4153 	res = hotkey_status_get(&status);
4154 	if (!res)
4155 		res = hotkey_mask_get();
4156 	mutex_unlock(&hotkey_mutex);
4157 	if (res)
4158 		return res;
4159 
4160 	seq_printf(m, "status:\t\t%s\n", str_enabled_disabled(status & BIT(0)));
4161 	if (hotkey_all_mask) {
4162 		seq_printf(m, "mask:\t\t0x%08x\n", hotkey_user_mask);
4163 		seq_printf(m, "commands:\tenable, disable, reset, <mask>\n");
4164 	} else {
4165 		seq_printf(m, "mask:\t\tnot supported\n");
4166 		seq_printf(m, "commands:\tenable, disable, reset\n");
4167 	}
4168 
4169 	return 0;
4170 }
4171 
4172 static void hotkey_enabledisable_warn(bool enable)
4173 {
4174 	tpacpi_log_usertask("procfs hotkey enable/disable");
4175 	if (!WARN((tpacpi_lifecycle == TPACPI_LIFE_RUNNING || !enable),
4176 		  pr_fmt("hotkey enable/disable functionality has been removed from the driver.  Hotkeys are always enabled.\n")))
4177 		pr_err("Please remove the hotkey=enable module parameter, it is deprecated.  Hotkeys are always enabled.\n");
4178 }
4179 
4180 static int hotkey_write(char *buf)
4181 {
4182 	int res;
4183 	u32 mask;
4184 	char *cmd;
4185 
4186 	if (!tp_features.hotkey)
4187 		return -ENODEV;
4188 
4189 	if (mutex_lock_killable(&hotkey_mutex))
4190 		return -ERESTARTSYS;
4191 
4192 	mask = hotkey_user_mask;
4193 
4194 	res = 0;
4195 	while ((cmd = strsep(&buf, ","))) {
4196 		if (strstarts(cmd, "enable")) {
4197 			hotkey_enabledisable_warn(1);
4198 		} else if (strstarts(cmd, "disable")) {
4199 			hotkey_enabledisable_warn(0);
4200 			res = -EPERM;
4201 		} else if (strstarts(cmd, "reset")) {
4202 			mask = (hotkey_all_mask | hotkey_source_mask)
4203 				& ~hotkey_reserved_mask;
4204 		} else if (sscanf(cmd, "0x%x", &mask) == 1) {
4205 			/* mask set */
4206 		} else if (sscanf(cmd, "%x", &mask) == 1) {
4207 			/* mask set */
4208 		} else {
4209 			res = -EINVAL;
4210 			goto errexit;
4211 		}
4212 	}
4213 
4214 	if (!res) {
4215 		tpacpi_disclose_usertask("procfs hotkey",
4216 			"set mask to 0x%08x\n", mask);
4217 		res = hotkey_user_mask_set(mask);
4218 	}
4219 
4220 errexit:
4221 	mutex_unlock(&hotkey_mutex);
4222 	return res;
4223 }
4224 
4225 static const struct acpi_device_id ibm_htk_device_ids[] = {
4226 	{TPACPI_ACPI_IBM_HKEY_HID, 0},
4227 	{TPACPI_ACPI_LENOVO_HKEY_HID, 0},
4228 	{TPACPI_ACPI_LENOVO_HKEY_V2_HID, 0},
4229 	{"", 0},
4230 };
4231 
4232 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
4233 	.hid = ibm_htk_device_ids,
4234 	.notify = hotkey_notify,
4235 	.handle = &hkey_handle,
4236 	.type = ACPI_DEVICE_NOTIFY,
4237 };
4238 
4239 static struct ibm_struct hotkey_driver_data = {
4240 	.name = "hotkey",
4241 	.read = hotkey_read,
4242 	.write = hotkey_write,
4243 	.exit = hotkey_exit,
4244 	.resume = hotkey_resume,
4245 	.suspend = hotkey_suspend,
4246 	.acpi = &ibm_hotkey_acpidriver,
4247 };
4248 
4249 /*************************************************************************
4250  * Bluetooth subdriver
4251  */
4252 
4253 enum {
4254 	/* ACPI GBDC/SBDC bits */
4255 	TP_ACPI_BLUETOOTH_HWPRESENT	= 0x01,	/* Bluetooth hw available */
4256 	TP_ACPI_BLUETOOTH_RADIOSSW	= 0x02,	/* Bluetooth radio enabled */
4257 	TP_ACPI_BLUETOOTH_RESUMECTRL	= 0x04,	/* Bluetooth state at resume:
4258 						   0 = disable, 1 = enable */
4259 };
4260 
4261 enum {
4262 	/* ACPI \BLTH commands */
4263 	TP_ACPI_BLTH_GET_ULTRAPORT_ID	= 0x00, /* Get Ultraport BT ID */
4264 	TP_ACPI_BLTH_GET_PWR_ON_RESUME	= 0x01, /* Get power-on-resume state */
4265 	TP_ACPI_BLTH_PWR_ON_ON_RESUME	= 0x02, /* Resume powered on */
4266 	TP_ACPI_BLTH_PWR_OFF_ON_RESUME	= 0x03,	/* Resume powered off */
4267 	TP_ACPI_BLTH_SAVE_STATE		= 0x05, /* Save state for S4/S5 */
4268 };
4269 
4270 #define TPACPI_RFK_BLUETOOTH_SW_NAME	"tpacpi_bluetooth_sw"
4271 
4272 static int bluetooth_get_status(void)
4273 {
4274 	int status;
4275 
4276 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4277 	if (dbg_bluetoothemul)
4278 		return (tpacpi_bluetooth_emulstate) ?
4279 		       TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4280 #endif
4281 
4282 	if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
4283 		return -EIO;
4284 
4285 	return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ?
4286 			TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4287 }
4288 
4289 static int bluetooth_set_status(enum tpacpi_rfkill_state state)
4290 {
4291 	int status;
4292 
4293 	vdbg_printk(TPACPI_DBG_RFKILL, "will attempt to %s bluetooth\n",
4294 		    str_enable_disable(state == TPACPI_RFK_RADIO_ON));
4295 
4296 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4297 	if (dbg_bluetoothemul) {
4298 		tpacpi_bluetooth_emulstate = (state == TPACPI_RFK_RADIO_ON);
4299 		return 0;
4300 	}
4301 #endif
4302 
4303 	if (state == TPACPI_RFK_RADIO_ON)
4304 		status = TP_ACPI_BLUETOOTH_RADIOSSW
4305 			  | TP_ACPI_BLUETOOTH_RESUMECTRL;
4306 	else
4307 		status = 0;
4308 
4309 	if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
4310 		return -EIO;
4311 
4312 	return 0;
4313 }
4314 
4315 /* sysfs bluetooth enable ---------------------------------------------- */
4316 static ssize_t bluetooth_enable_show(struct device *dev,
4317 			   struct device_attribute *attr,
4318 			   char *buf)
4319 {
4320 	return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_BLUETOOTH_SW_ID,
4321 			attr, buf);
4322 }
4323 
4324 static ssize_t bluetooth_enable_store(struct device *dev,
4325 			    struct device_attribute *attr,
4326 			    const char *buf, size_t count)
4327 {
4328 	return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_BLUETOOTH_SW_ID,
4329 				attr, buf, count);
4330 }
4331 
4332 static DEVICE_ATTR_RW(bluetooth_enable);
4333 
4334 /* --------------------------------------------------------------------- */
4335 
4336 static struct attribute *bluetooth_attributes[] = {
4337 	&dev_attr_bluetooth_enable.attr,
4338 	NULL
4339 };
4340 
4341 static umode_t bluetooth_attr_is_visible(struct kobject *kobj,
4342 					 struct attribute *attr, int n)
4343 {
4344 	return tp_features.bluetooth ? attr->mode : 0;
4345 }
4346 
4347 static const struct attribute_group bluetooth_attr_group = {
4348 	.is_visible = bluetooth_attr_is_visible,
4349 	.attrs = bluetooth_attributes,
4350 };
4351 
4352 static const struct tpacpi_rfk_ops bluetooth_tprfk_ops = {
4353 	.get_status = bluetooth_get_status,
4354 	.set_status = bluetooth_set_status,
4355 };
4356 
4357 static void bluetooth_shutdown(void)
4358 {
4359 	/* Order firmware to save current state to NVRAM */
4360 	if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd",
4361 			TP_ACPI_BLTH_SAVE_STATE))
4362 		pr_notice("failed to save bluetooth state to NVRAM\n");
4363 	else
4364 		vdbg_printk(TPACPI_DBG_RFKILL,
4365 			"bluetooth state saved to NVRAM\n");
4366 }
4367 
4368 static void bluetooth_exit(void)
4369 {
4370 	tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
4371 	bluetooth_shutdown();
4372 }
4373 
4374 static const struct dmi_system_id fwbug_list[] __initconst = {
4375 	{
4376 		.ident = "ThinkPad E485",
4377 		.driver_data = &quirk_btusb_bug,
4378 		.matches = {
4379 			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
4380 			DMI_MATCH(DMI_BOARD_NAME, "20KU"),
4381 		},
4382 	},
4383 	{
4384 		.ident = "ThinkPad E585",
4385 		.driver_data = &quirk_btusb_bug,
4386 		.matches = {
4387 			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
4388 			DMI_MATCH(DMI_BOARD_NAME, "20KV"),
4389 		},
4390 	},
4391 	{
4392 		.ident = "ThinkPad A285 - 20MW",
4393 		.driver_data = &quirk_btusb_bug,
4394 		.matches = {
4395 			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
4396 			DMI_MATCH(DMI_BOARD_NAME, "20MW"),
4397 		},
4398 	},
4399 	{
4400 		.ident = "ThinkPad A285 - 20MX",
4401 		.driver_data = &quirk_btusb_bug,
4402 		.matches = {
4403 			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
4404 			DMI_MATCH(DMI_BOARD_NAME, "20MX"),
4405 		},
4406 	},
4407 	{
4408 		.ident = "ThinkPad A485 - 20MU",
4409 		.driver_data = &quirk_btusb_bug,
4410 		.matches = {
4411 			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
4412 			DMI_MATCH(DMI_BOARD_NAME, "20MU"),
4413 		},
4414 	},
4415 	{
4416 		.ident = "ThinkPad A485 - 20MV",
4417 		.driver_data = &quirk_btusb_bug,
4418 		.matches = {
4419 			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
4420 			DMI_MATCH(DMI_BOARD_NAME, "20MV"),
4421 		},
4422 	},
4423 	{}
4424 };
4425 
4426 static const struct pci_device_id fwbug_cards_ids[] __initconst = {
4427 	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x24F3) },
4428 	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x24FD) },
4429 	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x2526) },
4430 	{}
4431 };
4432 
4433 
4434 static int __init have_bt_fwbug(void)
4435 {
4436 	/*
4437 	 * Some AMD based ThinkPads have a firmware bug that calling
4438 	 * "GBDC" will cause bluetooth on Intel wireless cards blocked
4439 	 */
4440 	if (tp_features.quirks && tp_features.quirks->btusb_bug &&
4441 	    pci_dev_present(fwbug_cards_ids)) {
4442 		vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4443 			FW_BUG "disable bluetooth subdriver for Intel cards\n");
4444 		return 1;
4445 	} else
4446 		return 0;
4447 }
4448 
4449 static int __init bluetooth_init(struct ibm_init_struct *iibm)
4450 {
4451 	int res;
4452 	int status = 0;
4453 
4454 	vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4455 			"initializing bluetooth subdriver\n");
4456 
4457 	TPACPI_ACPIHANDLE_INIT(hkey);
4458 
4459 	/* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
4460 	   G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
4461 	tp_features.bluetooth = !have_bt_fwbug() && hkey_handle &&
4462 	    acpi_evalf(hkey_handle, &status, "GBDC", "qd");
4463 
4464 	vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4465 		"bluetooth is %s, status 0x%02x\n",
4466 		str_supported(tp_features.bluetooth),
4467 		status);
4468 
4469 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4470 	if (dbg_bluetoothemul) {
4471 		tp_features.bluetooth = 1;
4472 		pr_info("bluetooth switch emulation enabled\n");
4473 	} else
4474 #endif
4475 	if (tp_features.bluetooth &&
4476 	    !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
4477 		/* no bluetooth hardware present in system */
4478 		tp_features.bluetooth = 0;
4479 		dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4480 			   "bluetooth hardware not installed\n");
4481 	}
4482 
4483 	if (!tp_features.bluetooth)
4484 		return -ENODEV;
4485 
4486 	res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID,
4487 				&bluetooth_tprfk_ops,
4488 				RFKILL_TYPE_BLUETOOTH,
4489 				TPACPI_RFK_BLUETOOTH_SW_NAME,
4490 				true);
4491 	return res;
4492 }
4493 
4494 /* procfs -------------------------------------------------------------- */
4495 static int bluetooth_read(struct seq_file *m)
4496 {
4497 	return tpacpi_rfk_procfs_read(TPACPI_RFK_BLUETOOTH_SW_ID, m);
4498 }
4499 
4500 static int bluetooth_write(char *buf)
4501 {
4502 	return tpacpi_rfk_procfs_write(TPACPI_RFK_BLUETOOTH_SW_ID, buf);
4503 }
4504 
4505 static struct ibm_struct bluetooth_driver_data = {
4506 	.name = "bluetooth",
4507 	.read = bluetooth_read,
4508 	.write = bluetooth_write,
4509 	.exit = bluetooth_exit,
4510 	.shutdown = bluetooth_shutdown,
4511 };
4512 
4513 /*************************************************************************
4514  * Wan subdriver
4515  */
4516 
4517 enum {
4518 	/* ACPI GWAN/SWAN bits */
4519 	TP_ACPI_WANCARD_HWPRESENT	= 0x01,	/* Wan hw available */
4520 	TP_ACPI_WANCARD_RADIOSSW	= 0x02,	/* Wan radio enabled */
4521 	TP_ACPI_WANCARD_RESUMECTRL	= 0x04,	/* Wan state at resume:
4522 						   0 = disable, 1 = enable */
4523 };
4524 
4525 #define TPACPI_RFK_WWAN_SW_NAME		"tpacpi_wwan_sw"
4526 
4527 static int wan_get_status(void)
4528 {
4529 	int status;
4530 
4531 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4532 	if (dbg_wwanemul)
4533 		return (tpacpi_wwan_emulstate) ?
4534 		       TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4535 #endif
4536 
4537 	if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
4538 		return -EIO;
4539 
4540 	return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ?
4541 			TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4542 }
4543 
4544 static int wan_set_status(enum tpacpi_rfkill_state state)
4545 {
4546 	int status;
4547 
4548 	vdbg_printk(TPACPI_DBG_RFKILL, "will attempt to %s wwan\n",
4549 		    str_enable_disable(state == TPACPI_RFK_RADIO_ON));
4550 
4551 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4552 	if (dbg_wwanemul) {
4553 		tpacpi_wwan_emulstate = (state == TPACPI_RFK_RADIO_ON);
4554 		return 0;
4555 	}
4556 #endif
4557 
4558 	if (state == TPACPI_RFK_RADIO_ON)
4559 		status = TP_ACPI_WANCARD_RADIOSSW
4560 			 | TP_ACPI_WANCARD_RESUMECTRL;
4561 	else
4562 		status = 0;
4563 
4564 	if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
4565 		return -EIO;
4566 
4567 	return 0;
4568 }
4569 
4570 /* sysfs wan enable ---------------------------------------------------- */
4571 static ssize_t wan_enable_show(struct device *dev,
4572 			   struct device_attribute *attr,
4573 			   char *buf)
4574 {
4575 	return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_WWAN_SW_ID,
4576 			attr, buf);
4577 }
4578 
4579 static ssize_t wan_enable_store(struct device *dev,
4580 			    struct device_attribute *attr,
4581 			    const char *buf, size_t count)
4582 {
4583 	return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_WWAN_SW_ID,
4584 			attr, buf, count);
4585 }
4586 
4587 static DEVICE_ATTR(wwan_enable, S_IWUSR | S_IRUGO,
4588 		   wan_enable_show, wan_enable_store);
4589 
4590 /* --------------------------------------------------------------------- */
4591 
4592 static struct attribute *wan_attributes[] = {
4593 	&dev_attr_wwan_enable.attr,
4594 	NULL
4595 };
4596 
4597 static umode_t wan_attr_is_visible(struct kobject *kobj, struct attribute *attr,
4598 				   int n)
4599 {
4600 	return tp_features.wan ? attr->mode : 0;
4601 }
4602 
4603 static const struct attribute_group wan_attr_group = {
4604 	.is_visible = wan_attr_is_visible,
4605 	.attrs = wan_attributes,
4606 };
4607 
4608 static const struct tpacpi_rfk_ops wan_tprfk_ops = {
4609 	.get_status = wan_get_status,
4610 	.set_status = wan_set_status,
4611 };
4612 
4613 static void wan_shutdown(void)
4614 {
4615 	/* Order firmware to save current state to NVRAM */
4616 	if (!acpi_evalf(NULL, NULL, "\\WGSV", "vd",
4617 			TP_ACPI_WGSV_SAVE_STATE))
4618 		pr_notice("failed to save WWAN state to NVRAM\n");
4619 	else
4620 		vdbg_printk(TPACPI_DBG_RFKILL,
4621 			"WWAN state saved to NVRAM\n");
4622 }
4623 
4624 static void wan_exit(void)
4625 {
4626 	tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
4627 	wan_shutdown();
4628 }
4629 
4630 static int __init wan_init(struct ibm_init_struct *iibm)
4631 {
4632 	int res;
4633 	int status = 0;
4634 
4635 	vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4636 			"initializing wan subdriver\n");
4637 
4638 	TPACPI_ACPIHANDLE_INIT(hkey);
4639 
4640 	tp_features.wan = hkey_handle &&
4641 	    acpi_evalf(hkey_handle, &status, "GWAN", "qd");
4642 
4643 	vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4644 		"wan is %s, status 0x%02x\n",
4645 		str_supported(tp_features.wan),
4646 		status);
4647 
4648 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4649 	if (dbg_wwanemul) {
4650 		tp_features.wan = 1;
4651 		pr_info("wwan switch emulation enabled\n");
4652 	} else
4653 #endif
4654 	if (tp_features.wan &&
4655 	    !(status & TP_ACPI_WANCARD_HWPRESENT)) {
4656 		/* no wan hardware present in system */
4657 		tp_features.wan = 0;
4658 		dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4659 			   "wan hardware not installed\n");
4660 	}
4661 
4662 	if (!tp_features.wan)
4663 		return -ENODEV;
4664 
4665 	res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID,
4666 				&wan_tprfk_ops,
4667 				RFKILL_TYPE_WWAN,
4668 				TPACPI_RFK_WWAN_SW_NAME,
4669 				true);
4670 	return res;
4671 }
4672 
4673 /* procfs -------------------------------------------------------------- */
4674 static int wan_read(struct seq_file *m)
4675 {
4676 	return tpacpi_rfk_procfs_read(TPACPI_RFK_WWAN_SW_ID, m);
4677 }
4678 
4679 static int wan_write(char *buf)
4680 {
4681 	return tpacpi_rfk_procfs_write(TPACPI_RFK_WWAN_SW_ID, buf);
4682 }
4683 
4684 static struct ibm_struct wan_driver_data = {
4685 	.name = "wan",
4686 	.read = wan_read,
4687 	.write = wan_write,
4688 	.exit = wan_exit,
4689 	.shutdown = wan_shutdown,
4690 };
4691 
4692 /*************************************************************************
4693  * UWB subdriver
4694  */
4695 
4696 enum {
4697 	/* ACPI GUWB/SUWB bits */
4698 	TP_ACPI_UWB_HWPRESENT	= 0x01,	/* UWB hw available */
4699 	TP_ACPI_UWB_RADIOSSW	= 0x02,	/* UWB radio enabled */
4700 };
4701 
4702 #define TPACPI_RFK_UWB_SW_NAME	"tpacpi_uwb_sw"
4703 
4704 static int uwb_get_status(void)
4705 {
4706 	int status;
4707 
4708 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4709 	if (dbg_uwbemul)
4710 		return (tpacpi_uwb_emulstate) ?
4711 		       TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4712 #endif
4713 
4714 	if (!acpi_evalf(hkey_handle, &status, "GUWB", "d"))
4715 		return -EIO;
4716 
4717 	return ((status & TP_ACPI_UWB_RADIOSSW) != 0) ?
4718 			TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4719 }
4720 
4721 static int uwb_set_status(enum tpacpi_rfkill_state state)
4722 {
4723 	int status;
4724 
4725 	vdbg_printk(TPACPI_DBG_RFKILL, "will attempt to %s UWB\n",
4726 		    str_enable_disable(state == TPACPI_RFK_RADIO_ON));
4727 
4728 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4729 	if (dbg_uwbemul) {
4730 		tpacpi_uwb_emulstate = (state == TPACPI_RFK_RADIO_ON);
4731 		return 0;
4732 	}
4733 #endif
4734 
4735 	if (state == TPACPI_RFK_RADIO_ON)
4736 		status = TP_ACPI_UWB_RADIOSSW;
4737 	else
4738 		status = 0;
4739 
4740 	if (!acpi_evalf(hkey_handle, NULL, "SUWB", "vd", status))
4741 		return -EIO;
4742 
4743 	return 0;
4744 }
4745 
4746 /* --------------------------------------------------------------------- */
4747 
4748 static const struct tpacpi_rfk_ops uwb_tprfk_ops = {
4749 	.get_status = uwb_get_status,
4750 	.set_status = uwb_set_status,
4751 };
4752 
4753 static void uwb_exit(void)
4754 {
4755 	tpacpi_destroy_rfkill(TPACPI_RFK_UWB_SW_ID);
4756 }
4757 
4758 static int __init uwb_init(struct ibm_init_struct *iibm)
4759 {
4760 	int res;
4761 	int status = 0;
4762 
4763 	vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4764 			"initializing uwb subdriver\n");
4765 
4766 	TPACPI_ACPIHANDLE_INIT(hkey);
4767 
4768 	tp_features.uwb = hkey_handle &&
4769 	    acpi_evalf(hkey_handle, &status, "GUWB", "qd");
4770 
4771 	vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4772 		"uwb is %s, status 0x%02x\n",
4773 		str_supported(tp_features.uwb),
4774 		status);
4775 
4776 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4777 	if (dbg_uwbemul) {
4778 		tp_features.uwb = 1;
4779 		pr_info("uwb switch emulation enabled\n");
4780 	} else
4781 #endif
4782 	if (tp_features.uwb &&
4783 	    !(status & TP_ACPI_UWB_HWPRESENT)) {
4784 		/* no uwb hardware present in system */
4785 		tp_features.uwb = 0;
4786 		dbg_printk(TPACPI_DBG_INIT,
4787 			   "uwb hardware not installed\n");
4788 	}
4789 
4790 	if (!tp_features.uwb)
4791 		return -ENODEV;
4792 
4793 	res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID,
4794 				&uwb_tprfk_ops,
4795 				RFKILL_TYPE_UWB,
4796 				TPACPI_RFK_UWB_SW_NAME,
4797 				false);
4798 	return res;
4799 }
4800 
4801 static struct ibm_struct uwb_driver_data = {
4802 	.name = "uwb",
4803 	.exit = uwb_exit,
4804 	.flags.experimental = 1,
4805 };
4806 
4807 /*************************************************************************
4808  * Video subdriver
4809  */
4810 
4811 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
4812 
4813 enum video_access_mode {
4814 	TPACPI_VIDEO_NONE = 0,
4815 	TPACPI_VIDEO_570,	/* 570 */
4816 	TPACPI_VIDEO_770,	/* 600e/x, 770e, 770x */
4817 	TPACPI_VIDEO_NEW,	/* all others */
4818 };
4819 
4820 enum {	/* video status flags, based on VIDEO_570 */
4821 	TP_ACPI_VIDEO_S_LCD = 0x01,	/* LCD output enabled */
4822 	TP_ACPI_VIDEO_S_CRT = 0x02,	/* CRT output enabled */
4823 	TP_ACPI_VIDEO_S_DVI = 0x08,	/* DVI output enabled */
4824 };
4825 
4826 enum {  /* TPACPI_VIDEO_570 constants */
4827 	TP_ACPI_VIDEO_570_PHSCMD = 0x87,	/* unknown magic constant :( */
4828 	TP_ACPI_VIDEO_570_PHSMASK = 0x03,	/* PHS bits that map to
4829 						 * video_status_flags */
4830 	TP_ACPI_VIDEO_570_PHS2CMD = 0x8b,	/* unknown magic constant :( */
4831 	TP_ACPI_VIDEO_570_PHS2SET = 0x80,	/* unknown magic constant :( */
4832 };
4833 
4834 static enum video_access_mode video_supported;
4835 static int video_orig_autosw;
4836 
4837 static int video_autosw_get(void);
4838 static int video_autosw_set(int enable);
4839 
4840 TPACPI_HANDLE(vid, root,
4841 	      "\\_SB.PCI.AGP.VGA",	/* 570 */
4842 	      "\\_SB.PCI0.AGP0.VID0",	/* 600e/x, 770x */
4843 	      "\\_SB.PCI0.VID0",	/* 770e */
4844 	      "\\_SB.PCI0.VID",		/* A21e, G4x, R50e, X30, X40 */
4845 	      "\\_SB.PCI0.AGP.VGA",	/* X100e and a few others */
4846 	      "\\_SB.PCI0.AGP.VID",	/* all others */
4847 	);				/* R30, R31 */
4848 
4849 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID");	/* G41 */
4850 
4851 static int __init video_init(struct ibm_init_struct *iibm)
4852 {
4853 	int ivga;
4854 
4855 	vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
4856 
4857 	TPACPI_ACPIHANDLE_INIT(vid);
4858 	if (tpacpi_is_ibm())
4859 		TPACPI_ACPIHANDLE_INIT(vid2);
4860 
4861 	if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
4862 		/* G41, assume IVGA doesn't change */
4863 		vid_handle = vid2_handle;
4864 
4865 	if (!vid_handle)
4866 		/* video switching not supported on R30, R31 */
4867 		video_supported = TPACPI_VIDEO_NONE;
4868 	else if (tpacpi_is_ibm() &&
4869 		 acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
4870 		/* 570 */
4871 		video_supported = TPACPI_VIDEO_570;
4872 	else if (tpacpi_is_ibm() &&
4873 		 acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
4874 		/* 600e/x, 770e, 770x */
4875 		video_supported = TPACPI_VIDEO_770;
4876 	else
4877 		/* all others */
4878 		video_supported = TPACPI_VIDEO_NEW;
4879 
4880 	vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
4881 		str_supported(video_supported != TPACPI_VIDEO_NONE),
4882 		video_supported);
4883 
4884 	return (video_supported != TPACPI_VIDEO_NONE) ? 0 : -ENODEV;
4885 }
4886 
4887 static void video_exit(void)
4888 {
4889 	dbg_printk(TPACPI_DBG_EXIT,
4890 		   "restoring original video autoswitch mode\n");
4891 	if (video_autosw_set(video_orig_autosw))
4892 		pr_err("error while trying to restore original video autoswitch mode\n");
4893 }
4894 
4895 static int video_outputsw_get(void)
4896 {
4897 	int status = 0;
4898 	int i;
4899 
4900 	switch (video_supported) {
4901 	case TPACPI_VIDEO_570:
4902 		if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
4903 				 TP_ACPI_VIDEO_570_PHSCMD))
4904 			return -EIO;
4905 		status = i & TP_ACPI_VIDEO_570_PHSMASK;
4906 		break;
4907 	case TPACPI_VIDEO_770:
4908 		if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
4909 			return -EIO;
4910 		if (i)
4911 			status |= TP_ACPI_VIDEO_S_LCD;
4912 		if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
4913 			return -EIO;
4914 		if (i)
4915 			status |= TP_ACPI_VIDEO_S_CRT;
4916 		break;
4917 	case TPACPI_VIDEO_NEW:
4918 		if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
4919 		    !acpi_evalf(NULL, &i, "\\VCDC", "d"))
4920 			return -EIO;
4921 		if (i)
4922 			status |= TP_ACPI_VIDEO_S_CRT;
4923 
4924 		if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
4925 		    !acpi_evalf(NULL, &i, "\\VCDL", "d"))
4926 			return -EIO;
4927 		if (i)
4928 			status |= TP_ACPI_VIDEO_S_LCD;
4929 		if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
4930 			return -EIO;
4931 		if (i)
4932 			status |= TP_ACPI_VIDEO_S_DVI;
4933 		break;
4934 	default:
4935 		return -ENOSYS;
4936 	}
4937 
4938 	return status;
4939 }
4940 
4941 static int video_outputsw_set(int status)
4942 {
4943 	int autosw;
4944 	int res = 0;
4945 
4946 	switch (video_supported) {
4947 	case TPACPI_VIDEO_570:
4948 		res = acpi_evalf(NULL, NULL,
4949 				 "\\_SB.PHS2", "vdd",
4950 				 TP_ACPI_VIDEO_570_PHS2CMD,
4951 				 status | TP_ACPI_VIDEO_570_PHS2SET);
4952 		break;
4953 	case TPACPI_VIDEO_770:
4954 		autosw = video_autosw_get();
4955 		if (autosw < 0)
4956 			return autosw;
4957 
4958 		res = video_autosw_set(1);
4959 		if (res)
4960 			return res;
4961 		res = acpi_evalf(vid_handle, NULL,
4962 				 "ASWT", "vdd", status * 0x100, 0);
4963 		if (!autosw && video_autosw_set(autosw)) {
4964 			pr_err("video auto-switch left enabled due to error\n");
4965 			return -EIO;
4966 		}
4967 		break;
4968 	case TPACPI_VIDEO_NEW:
4969 		res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
4970 		      acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
4971 		break;
4972 	default:
4973 		return -ENOSYS;
4974 	}
4975 
4976 	return (res) ? 0 : -EIO;
4977 }
4978 
4979 static int video_autosw_get(void)
4980 {
4981 	int autosw = 0;
4982 
4983 	switch (video_supported) {
4984 	case TPACPI_VIDEO_570:
4985 		if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
4986 			return -EIO;
4987 		break;
4988 	case TPACPI_VIDEO_770:
4989 	case TPACPI_VIDEO_NEW:
4990 		if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
4991 			return -EIO;
4992 		break;
4993 	default:
4994 		return -ENOSYS;
4995 	}
4996 
4997 	return autosw & 1;
4998 }
4999 
5000 static int video_autosw_set(int enable)
5001 {
5002 	if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable) ? 1 : 0))
5003 		return -EIO;
5004 	return 0;
5005 }
5006 
5007 static int video_outputsw_cycle(void)
5008 {
5009 	int autosw = video_autosw_get();
5010 	int res;
5011 
5012 	if (autosw < 0)
5013 		return autosw;
5014 
5015 	switch (video_supported) {
5016 	case TPACPI_VIDEO_570:
5017 		res = video_autosw_set(1);
5018 		if (res)
5019 			return res;
5020 		res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
5021 		break;
5022 	case TPACPI_VIDEO_770:
5023 	case TPACPI_VIDEO_NEW:
5024 		res = video_autosw_set(1);
5025 		if (res)
5026 			return res;
5027 		res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
5028 		break;
5029 	default:
5030 		return -ENOSYS;
5031 	}
5032 	if (!autosw && video_autosw_set(autosw)) {
5033 		pr_err("video auto-switch left enabled due to error\n");
5034 		return -EIO;
5035 	}
5036 
5037 	return (res) ? 0 : -EIO;
5038 }
5039 
5040 static int video_expand_toggle(void)
5041 {
5042 	switch (video_supported) {
5043 	case TPACPI_VIDEO_570:
5044 		return acpi_evalf(ec_handle, NULL, "_Q17", "v") ?
5045 			0 : -EIO;
5046 	case TPACPI_VIDEO_770:
5047 		return acpi_evalf(vid_handle, NULL, "VEXP", "v") ?
5048 			0 : -EIO;
5049 	case TPACPI_VIDEO_NEW:
5050 		return acpi_evalf(NULL, NULL, "\\VEXP", "v") ?
5051 			0 : -EIO;
5052 	default:
5053 		return -ENOSYS;
5054 	}
5055 	/* not reached */
5056 }
5057 
5058 static int video_read(struct seq_file *m)
5059 {
5060 	int status, autosw;
5061 
5062 	if (video_supported == TPACPI_VIDEO_NONE) {
5063 		seq_printf(m, "status:\t\tnot supported\n");
5064 		return 0;
5065 	}
5066 
5067 	/* Even reads can crash X.org, so... */
5068 	if (!capable(CAP_SYS_ADMIN))
5069 		return -EPERM;
5070 
5071 	status = video_outputsw_get();
5072 	if (status < 0)
5073 		return status;
5074 
5075 	autosw = video_autosw_get();
5076 	if (autosw < 0)
5077 		return autosw;
5078 
5079 	seq_printf(m, "status:\t\tsupported\n");
5080 	seq_printf(m, "lcd:\t\t%s\n", str_enabled_disabled(status & BIT(0)));
5081 	seq_printf(m, "crt:\t\t%s\n", str_enabled_disabled(status & BIT(1)));
5082 	if (video_supported == TPACPI_VIDEO_NEW)
5083 		seq_printf(m, "dvi:\t\t%s\n", str_enabled_disabled(status & BIT(3)));
5084 	seq_printf(m, "auto:\t\t%s\n", str_enabled_disabled(autosw & BIT(0)));
5085 	seq_printf(m, "commands:\tlcd_enable, lcd_disable\n");
5086 	seq_printf(m, "commands:\tcrt_enable, crt_disable\n");
5087 	if (video_supported == TPACPI_VIDEO_NEW)
5088 		seq_printf(m, "commands:\tdvi_enable, dvi_disable\n");
5089 	seq_printf(m, "commands:\tauto_enable, auto_disable\n");
5090 	seq_printf(m, "commands:\tvideo_switch, expand_toggle\n");
5091 
5092 	return 0;
5093 }
5094 
5095 static int video_write(char *buf)
5096 {
5097 	char *cmd;
5098 	int enable, disable, status;
5099 	int res;
5100 
5101 	if (video_supported == TPACPI_VIDEO_NONE)
5102 		return -ENODEV;
5103 
5104 	/* Even reads can crash X.org, let alone writes... */
5105 	if (!capable(CAP_SYS_ADMIN))
5106 		return -EPERM;
5107 
5108 	enable = 0;
5109 	disable = 0;
5110 
5111 	while ((cmd = strsep(&buf, ","))) {
5112 		if (strstarts(cmd, "lcd_enable")) {
5113 			enable |= TP_ACPI_VIDEO_S_LCD;
5114 		} else if (strstarts(cmd, "lcd_disable")) {
5115 			disable |= TP_ACPI_VIDEO_S_LCD;
5116 		} else if (strstarts(cmd, "crt_enable")) {
5117 			enable |= TP_ACPI_VIDEO_S_CRT;
5118 		} else if (strstarts(cmd, "crt_disable")) {
5119 			disable |= TP_ACPI_VIDEO_S_CRT;
5120 		} else if (video_supported == TPACPI_VIDEO_NEW &&
5121 			   strstarts(cmd, "dvi_enable")) {
5122 			enable |= TP_ACPI_VIDEO_S_DVI;
5123 		} else if (video_supported == TPACPI_VIDEO_NEW &&
5124 			   strstarts(cmd, "dvi_disable")) {
5125 			disable |= TP_ACPI_VIDEO_S_DVI;
5126 		} else if (strstarts(cmd, "auto_enable")) {
5127 			res = video_autosw_set(1);
5128 			if (res)
5129 				return res;
5130 		} else if (strstarts(cmd, "auto_disable")) {
5131 			res = video_autosw_set(0);
5132 			if (res)
5133 				return res;
5134 		} else if (strstarts(cmd, "video_switch")) {
5135 			res = video_outputsw_cycle();
5136 			if (res)
5137 				return res;
5138 		} else if (strstarts(cmd, "expand_toggle")) {
5139 			res = video_expand_toggle();
5140 			if (res)
5141 				return res;
5142 		} else
5143 			return -EINVAL;
5144 	}
5145 
5146 	if (enable || disable) {
5147 		status = video_outputsw_get();
5148 		if (status < 0)
5149 			return status;
5150 		res = video_outputsw_set((status & ~disable) | enable);
5151 		if (res)
5152 			return res;
5153 	}
5154 
5155 	return 0;
5156 }
5157 
5158 static struct ibm_struct video_driver_data = {
5159 	.name = "video",
5160 	.read = video_read,
5161 	.write = video_write,
5162 	.exit = video_exit,
5163 };
5164 
5165 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */
5166 
5167 /*************************************************************************
5168  * Keyboard backlight subdriver
5169  */
5170 
5171 static enum led_brightness kbdlight_brightness;
5172 static DEFINE_MUTEX(kbdlight_mutex);
5173 
5174 static int kbdlight_set_level(int level)
5175 {
5176 	int ret = 0;
5177 
5178 	if (!hkey_handle)
5179 		return -ENXIO;
5180 
5181 	mutex_lock(&kbdlight_mutex);
5182 
5183 	if (!acpi_evalf(hkey_handle, NULL, "MLCS", "dd", level))
5184 		ret = -EIO;
5185 	else
5186 		kbdlight_brightness = level;
5187 
5188 	mutex_unlock(&kbdlight_mutex);
5189 
5190 	return ret;
5191 }
5192 
5193 static int kbdlight_get_level(void)
5194 {
5195 	int status = 0;
5196 
5197 	if (!hkey_handle)
5198 		return -ENXIO;
5199 
5200 	if (!acpi_evalf(hkey_handle, &status, "MLCG", "dd", 0))
5201 		return -EIO;
5202 
5203 	if (status < 0)
5204 		return status;
5205 
5206 	return status & 0x3;
5207 }
5208 
5209 static bool kbdlight_is_supported(void)
5210 {
5211 	int status = 0;
5212 
5213 	if (!hkey_handle)
5214 		return false;
5215 
5216 	if (!acpi_has_method(hkey_handle, "MLCG")) {
5217 		vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG is unavailable\n");
5218 		return false;
5219 	}
5220 
5221 	if (!acpi_evalf(hkey_handle, &status, "MLCG", "qdd", 0)) {
5222 		vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG failed\n");
5223 		return false;
5224 	}
5225 
5226 	if (status < 0) {
5227 		vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG err: %d\n", status);
5228 		return false;
5229 	}
5230 
5231 	vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG returned 0x%x\n", status);
5232 	/*
5233 	 * Guessed test for keyboard backlight:
5234 	 *
5235 	 * Machines with backlight keyboard return:
5236 	 *   b010100000010000000XX - ThinkPad X1 Carbon 3rd
5237 	 *   b110100010010000000XX - ThinkPad x230
5238 	 *   b010100000010000000XX - ThinkPad x240
5239 	 *   b010100000010000000XX - ThinkPad W541
5240 	 * (XX is current backlight level)
5241 	 *
5242 	 * Machines without backlight keyboard return:
5243 	 *   b10100001000000000000 - ThinkPad x230
5244 	 *   b10110001000000000000 - ThinkPad E430
5245 	 *   b00000000000000000000 - ThinkPad E450
5246 	 *
5247 	 * Candidate BITs for detection test (XOR):
5248 	 *   b01000000001000000000
5249 	 *              ^
5250 	 */
5251 	return status & BIT(9);
5252 }
5253 
5254 static int kbdlight_sysfs_set(struct led_classdev *led_cdev,
5255 			enum led_brightness brightness)
5256 {
5257 	return kbdlight_set_level(brightness);
5258 }
5259 
5260 static enum led_brightness kbdlight_sysfs_get(struct led_classdev *led_cdev)
5261 {
5262 	int level;
5263 
5264 	level = kbdlight_get_level();
5265 	if (level < 0)
5266 		return 0;
5267 
5268 	return level;
5269 }
5270 
5271 static struct tpacpi_led_classdev tpacpi_led_kbdlight = {
5272 	.led_classdev = {
5273 		.name		= "tpacpi::kbd_backlight",
5274 		.max_brightness	= 2,
5275 		.flags		= LED_BRIGHT_HW_CHANGED,
5276 		.brightness_set_blocking = &kbdlight_sysfs_set,
5277 		.brightness_get	= &kbdlight_sysfs_get,
5278 	}
5279 };
5280 
5281 static int __init kbdlight_init(struct ibm_init_struct *iibm)
5282 {
5283 	int rc;
5284 
5285 	vdbg_printk(TPACPI_DBG_INIT, "initializing kbdlight subdriver\n");
5286 
5287 	TPACPI_ACPIHANDLE_INIT(hkey);
5288 
5289 	if (!kbdlight_is_supported()) {
5290 		tp_features.kbdlight = 0;
5291 		vdbg_printk(TPACPI_DBG_INIT, "kbdlight is unsupported\n");
5292 		return -ENODEV;
5293 	}
5294 
5295 	kbdlight_brightness = kbdlight_sysfs_get(NULL);
5296 	tp_features.kbdlight = 1;
5297 
5298 	rc = led_classdev_register(&tpacpi_pdev->dev,
5299 				   &tpacpi_led_kbdlight.led_classdev);
5300 	if (rc < 0) {
5301 		tp_features.kbdlight = 0;
5302 		return rc;
5303 	}
5304 
5305 	tpacpi_hotkey_driver_mask_set(hotkey_driver_mask |
5306 				      TP_ACPI_HKEY_KBD_LIGHT_MASK);
5307 	return 0;
5308 }
5309 
5310 static void kbdlight_exit(void)
5311 {
5312 	led_classdev_unregister(&tpacpi_led_kbdlight.led_classdev);
5313 }
5314 
5315 static int kbdlight_set_level_and_update(int level)
5316 {
5317 	int ret;
5318 	struct led_classdev *led_cdev;
5319 
5320 	ret = kbdlight_set_level(level);
5321 	led_cdev = &tpacpi_led_kbdlight.led_classdev;
5322 
5323 	if (ret == 0 && !(led_cdev->flags & LED_SUSPENDED))
5324 		led_cdev->brightness = level;
5325 
5326 	return ret;
5327 }
5328 
5329 static int kbdlight_read(struct seq_file *m)
5330 {
5331 	int level;
5332 
5333 	if (!tp_features.kbdlight) {
5334 		seq_printf(m, "status:\t\tnot supported\n");
5335 	} else {
5336 		level = kbdlight_get_level();
5337 		if (level < 0)
5338 			seq_printf(m, "status:\t\terror %d\n", level);
5339 		else
5340 			seq_printf(m, "status:\t\t%d\n", level);
5341 		seq_printf(m, "commands:\t0, 1, 2\n");
5342 	}
5343 
5344 	return 0;
5345 }
5346 
5347 static int kbdlight_write(char *buf)
5348 {
5349 	char *cmd;
5350 	int res, level = -EINVAL;
5351 
5352 	if (!tp_features.kbdlight)
5353 		return -ENODEV;
5354 
5355 	while ((cmd = strsep(&buf, ","))) {
5356 		res = kstrtoint(cmd, 10, &level);
5357 		if (res < 0)
5358 			return res;
5359 	}
5360 
5361 	if (level >= 3 || level < 0)
5362 		return -EINVAL;
5363 
5364 	return kbdlight_set_level_and_update(level);
5365 }
5366 
5367 static void kbdlight_suspend(void)
5368 {
5369 	struct led_classdev *led_cdev;
5370 
5371 	if (!tp_features.kbdlight)
5372 		return;
5373 
5374 	led_cdev = &tpacpi_led_kbdlight.led_classdev;
5375 	led_update_brightness(led_cdev);
5376 	led_classdev_suspend(led_cdev);
5377 }
5378 
5379 static void kbdlight_resume(void)
5380 {
5381 	if (!tp_features.kbdlight)
5382 		return;
5383 
5384 	led_classdev_resume(&tpacpi_led_kbdlight.led_classdev);
5385 }
5386 
5387 static struct ibm_struct kbdlight_driver_data = {
5388 	.name = "kbdlight",
5389 	.read = kbdlight_read,
5390 	.write = kbdlight_write,
5391 	.suspend = kbdlight_suspend,
5392 	.resume = kbdlight_resume,
5393 	.exit = kbdlight_exit,
5394 };
5395 
5396 /*************************************************************************
5397  * Light (thinklight) subdriver
5398  */
5399 
5400 TPACPI_HANDLE(lght, root, "\\LGHT");	/* A21e, A2xm/p, T20-22, X20-21 */
5401 TPACPI_HANDLE(ledb, ec, "LEDB");		/* G4x */
5402 
5403 static int light_get_status(void)
5404 {
5405 	int status = 0;
5406 
5407 	if (tp_features.light_status) {
5408 		if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
5409 			return -EIO;
5410 		return (!!status);
5411 	}
5412 
5413 	return -ENXIO;
5414 }
5415 
5416 static int light_set_status(int status)
5417 {
5418 	int rc;
5419 
5420 	if (tp_features.light) {
5421 		if (cmos_handle) {
5422 			rc = acpi_evalf(cmos_handle, NULL, NULL, "vd",
5423 					(status) ?
5424 						TP_CMOS_THINKLIGHT_ON :
5425 						TP_CMOS_THINKLIGHT_OFF);
5426 		} else {
5427 			rc = acpi_evalf(lght_handle, NULL, NULL, "vd",
5428 					(status) ? 1 : 0);
5429 		}
5430 		return (rc) ? 0 : -EIO;
5431 	}
5432 
5433 	return -ENXIO;
5434 }
5435 
5436 static int light_sysfs_set(struct led_classdev *led_cdev,
5437 			enum led_brightness brightness)
5438 {
5439 	return light_set_status((brightness != LED_OFF) ?
5440 				TPACPI_LED_ON : TPACPI_LED_OFF);
5441 }
5442 
5443 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev)
5444 {
5445 	return (light_get_status() == 1) ? LED_ON : LED_OFF;
5446 }
5447 
5448 static struct tpacpi_led_classdev tpacpi_led_thinklight = {
5449 	.led_classdev = {
5450 		.name		= "tpacpi::thinklight",
5451 		.max_brightness	= 1,
5452 		.brightness_set_blocking = &light_sysfs_set,
5453 		.brightness_get	= &light_sysfs_get,
5454 	}
5455 };
5456 
5457 static int __init light_init(struct ibm_init_struct *iibm)
5458 {
5459 	int rc;
5460 
5461 	vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
5462 
5463 	if (tpacpi_is_ibm()) {
5464 		TPACPI_ACPIHANDLE_INIT(ledb);
5465 		TPACPI_ACPIHANDLE_INIT(lght);
5466 	}
5467 	TPACPI_ACPIHANDLE_INIT(cmos);
5468 
5469 	/* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
5470 	tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
5471 
5472 	if (tp_features.light)
5473 		/* light status not supported on
5474 		   570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
5475 		tp_features.light_status =
5476 			acpi_evalf(ec_handle, NULL, "KBLT", "qv");
5477 
5478 	vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n",
5479 		str_supported(tp_features.light),
5480 		str_supported(tp_features.light_status));
5481 
5482 	if (!tp_features.light)
5483 		return -ENODEV;
5484 
5485 	rc = led_classdev_register(&tpacpi_pdev->dev,
5486 				   &tpacpi_led_thinklight.led_classdev);
5487 
5488 	if (rc < 0) {
5489 		tp_features.light = 0;
5490 		tp_features.light_status = 0;
5491 	} else  {
5492 		rc = 0;
5493 	}
5494 
5495 	return rc;
5496 }
5497 
5498 static void light_exit(void)
5499 {
5500 	led_classdev_unregister(&tpacpi_led_thinklight.led_classdev);
5501 }
5502 
5503 static int light_read(struct seq_file *m)
5504 {
5505 	int status;
5506 
5507 	if (!tp_features.light) {
5508 		seq_printf(m, "status:\t\tnot supported\n");
5509 	} else if (!tp_features.light_status) {
5510 		seq_printf(m, "status:\t\tunknown\n");
5511 		seq_printf(m, "commands:\ton, off\n");
5512 	} else {
5513 		status = light_get_status();
5514 		if (status < 0)
5515 			return status;
5516 		seq_printf(m, "status:\t\t%s\n", str_on_off(status & BIT(0)));
5517 		seq_printf(m, "commands:\ton, off\n");
5518 	}
5519 
5520 	return 0;
5521 }
5522 
5523 static int light_write(char *buf)
5524 {
5525 	char *cmd;
5526 	int newstatus = 0;
5527 
5528 	if (!tp_features.light)
5529 		return -ENODEV;
5530 
5531 	while ((cmd = strsep(&buf, ","))) {
5532 		if (strstarts(cmd, "on")) {
5533 			newstatus = 1;
5534 		} else if (strstarts(cmd, "off")) {
5535 			newstatus = 0;
5536 		} else
5537 			return -EINVAL;
5538 	}
5539 
5540 	return light_set_status(newstatus);
5541 }
5542 
5543 static struct ibm_struct light_driver_data = {
5544 	.name = "light",
5545 	.read = light_read,
5546 	.write = light_write,
5547 	.exit = light_exit,
5548 };
5549 
5550 /*************************************************************************
5551  * CMOS subdriver
5552  */
5553 
5554 /* sysfs cmos_command -------------------------------------------------- */
5555 static ssize_t cmos_command_store(struct device *dev,
5556 			    struct device_attribute *attr,
5557 			    const char *buf, size_t count)
5558 {
5559 	unsigned long cmos_cmd;
5560 	int res;
5561 
5562 	if (parse_strtoul(buf, 21, &cmos_cmd))
5563 		return -EINVAL;
5564 
5565 	res = issue_thinkpad_cmos_command(cmos_cmd);
5566 	return (res) ? res : count;
5567 }
5568 
5569 static DEVICE_ATTR_WO(cmos_command);
5570 
5571 static struct attribute *cmos_attributes[] = {
5572 	&dev_attr_cmos_command.attr,
5573 	NULL
5574 };
5575 
5576 static umode_t cmos_attr_is_visible(struct kobject *kobj,
5577 				    struct attribute *attr, int n)
5578 {
5579 	return cmos_handle ? attr->mode : 0;
5580 }
5581 
5582 static const struct attribute_group cmos_attr_group = {
5583 	.is_visible = cmos_attr_is_visible,
5584 	.attrs = cmos_attributes,
5585 };
5586 
5587 /* --------------------------------------------------------------------- */
5588 
5589 static int __init cmos_init(struct ibm_init_struct *iibm)
5590 {
5591 	vdbg_printk(TPACPI_DBG_INIT,
5592 		    "initializing cmos commands subdriver\n");
5593 
5594 	TPACPI_ACPIHANDLE_INIT(cmos);
5595 
5596 	vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
5597 		    str_supported(cmos_handle != NULL));
5598 
5599 	return cmos_handle ? 0 : -ENODEV;
5600 }
5601 
5602 static int cmos_read(struct seq_file *m)
5603 {
5604 	/* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
5605 	   R30, R31, T20-22, X20-21 */
5606 	if (!cmos_handle)
5607 		seq_printf(m, "status:\t\tnot supported\n");
5608 	else {
5609 		seq_printf(m, "status:\t\tsupported\n");
5610 		seq_printf(m, "commands:\t<cmd> (<cmd> is 0-21)\n");
5611 	}
5612 
5613 	return 0;
5614 }
5615 
5616 static int cmos_write(char *buf)
5617 {
5618 	char *cmd;
5619 	int cmos_cmd, res;
5620 
5621 	while ((cmd = strsep(&buf, ","))) {
5622 		if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
5623 		    cmos_cmd >= 0 && cmos_cmd <= 21) {
5624 			/* cmos_cmd set */
5625 		} else
5626 			return -EINVAL;
5627 
5628 		res = issue_thinkpad_cmos_command(cmos_cmd);
5629 		if (res)
5630 			return res;
5631 	}
5632 
5633 	return 0;
5634 }
5635 
5636 static struct ibm_struct cmos_driver_data = {
5637 	.name = "cmos",
5638 	.read = cmos_read,
5639 	.write = cmos_write,
5640 };
5641 
5642 /*************************************************************************
5643  * LED subdriver
5644  */
5645 
5646 enum led_access_mode {
5647 	TPACPI_LED_NONE = 0,
5648 	TPACPI_LED_570,	/* 570 */
5649 	TPACPI_LED_OLD,	/* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
5650 	TPACPI_LED_NEW,	/* all others */
5651 };
5652 
5653 enum {	/* For TPACPI_LED_OLD */
5654 	TPACPI_LED_EC_HLCL = 0x0c,	/* EC reg to get led to power on */
5655 	TPACPI_LED_EC_HLBL = 0x0d,	/* EC reg to blink a lit led */
5656 	TPACPI_LED_EC_HLMS = 0x0e,	/* EC reg to select led to command */
5657 };
5658 
5659 static enum led_access_mode led_supported;
5660 
5661 static acpi_handle led_handle;
5662 
5663 #define TPACPI_LED_NUMLEDS 16
5664 static struct tpacpi_led_classdev *tpacpi_leds;
5665 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS];
5666 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = {
5667 	/* there's a limit of 19 chars + NULL before 2.6.26 */
5668 	"tpacpi::power",
5669 	"tpacpi:orange:batt",
5670 	"tpacpi:green:batt",
5671 	"tpacpi::dock_active",
5672 	"tpacpi::bay_active",
5673 	"tpacpi::dock_batt",
5674 	"tpacpi::unknown_led",
5675 	"tpacpi::standby",
5676 	"tpacpi::dock_status1",
5677 	"tpacpi::dock_status2",
5678 	"tpacpi::lid_logo_dot",
5679 	"tpacpi::unknown_led3",
5680 	"tpacpi::thinkvantage",
5681 };
5682 #define TPACPI_SAFE_LEDS	0x1481U
5683 
5684 static inline bool tpacpi_is_led_restricted(const unsigned int led)
5685 {
5686 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
5687 	return false;
5688 #else
5689 	return (1U & (TPACPI_SAFE_LEDS >> led)) == 0;
5690 #endif
5691 }
5692 
5693 static int led_get_status(const unsigned int led)
5694 {
5695 	int status;
5696 	enum led_status_t led_s;
5697 
5698 	switch (led_supported) {
5699 	case TPACPI_LED_570:
5700 		if (!acpi_evalf(ec_handle,
5701 				&status, "GLED", "dd", 1 << led))
5702 			return -EIO;
5703 		led_s = (status == 0) ?
5704 				TPACPI_LED_OFF :
5705 				((status == 1) ?
5706 					TPACPI_LED_ON :
5707 					TPACPI_LED_BLINK);
5708 		tpacpi_led_state_cache[led] = led_s;
5709 		return led_s;
5710 	default:
5711 		return -ENXIO;
5712 	}
5713 
5714 	/* not reached */
5715 }
5716 
5717 static int led_set_status(const unsigned int led,
5718 			  const enum led_status_t ledstatus)
5719 {
5720 	/* off, on, blink. Index is led_status_t */
5721 	static const unsigned int led_sled_arg1[] = { 0, 1, 3 };
5722 	static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 };
5723 
5724 	int rc = 0;
5725 
5726 	switch (led_supported) {
5727 	case TPACPI_LED_570:
5728 		/* 570 */
5729 		if (unlikely(led > 7))
5730 			return -EINVAL;
5731 		if (unlikely(tpacpi_is_led_restricted(led)))
5732 			return -EPERM;
5733 		if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
5734 				(1 << led), led_sled_arg1[ledstatus]))
5735 			return -EIO;
5736 		break;
5737 	case TPACPI_LED_OLD:
5738 		/* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
5739 		if (unlikely(led > 7))
5740 			return -EINVAL;
5741 		if (unlikely(tpacpi_is_led_restricted(led)))
5742 			return -EPERM;
5743 		rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led));
5744 		if (rc >= 0)
5745 			rc = ec_write(TPACPI_LED_EC_HLBL,
5746 				      (ledstatus == TPACPI_LED_BLINK) << led);
5747 		if (rc >= 0)
5748 			rc = ec_write(TPACPI_LED_EC_HLCL,
5749 				      (ledstatus != TPACPI_LED_OFF) << led);
5750 		break;
5751 	case TPACPI_LED_NEW:
5752 		/* all others */
5753 		if (unlikely(led >= TPACPI_LED_NUMLEDS))
5754 			return -EINVAL;
5755 		if (unlikely(tpacpi_is_led_restricted(led)))
5756 			return -EPERM;
5757 		if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
5758 				led, led_led_arg1[ledstatus]))
5759 			return -EIO;
5760 		break;
5761 	default:
5762 		return -ENXIO;
5763 	}
5764 
5765 	if (!rc)
5766 		tpacpi_led_state_cache[led] = ledstatus;
5767 
5768 	return rc;
5769 }
5770 
5771 static int led_sysfs_set(struct led_classdev *led_cdev,
5772 			enum led_brightness brightness)
5773 {
5774 	struct tpacpi_led_classdev *data = container_of(led_cdev,
5775 			     struct tpacpi_led_classdev, led_classdev);
5776 	enum led_status_t new_state;
5777 
5778 	if (brightness == LED_OFF)
5779 		new_state = TPACPI_LED_OFF;
5780 	else if (tpacpi_led_state_cache[data->led] != TPACPI_LED_BLINK)
5781 		new_state = TPACPI_LED_ON;
5782 	else
5783 		new_state = TPACPI_LED_BLINK;
5784 
5785 	return led_set_status(data->led, new_state);
5786 }
5787 
5788 static int led_sysfs_blink_set(struct led_classdev *led_cdev,
5789 			unsigned long *delay_on, unsigned long *delay_off)
5790 {
5791 	struct tpacpi_led_classdev *data = container_of(led_cdev,
5792 			     struct tpacpi_led_classdev, led_classdev);
5793 
5794 	/* Can we choose the flash rate? */
5795 	if (*delay_on == 0 && *delay_off == 0) {
5796 		/* yes. set them to the hardware blink rate (1 Hz) */
5797 		*delay_on = 500; /* ms */
5798 		*delay_off = 500; /* ms */
5799 	} else if ((*delay_on != 500) || (*delay_off != 500))
5800 		return -EINVAL;
5801 
5802 	return led_set_status(data->led, TPACPI_LED_BLINK);
5803 }
5804 
5805 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev)
5806 {
5807 	int rc;
5808 
5809 	struct tpacpi_led_classdev *data = container_of(led_cdev,
5810 			     struct tpacpi_led_classdev, led_classdev);
5811 
5812 	rc = led_get_status(data->led);
5813 
5814 	if (rc == TPACPI_LED_OFF || rc < 0)
5815 		rc = LED_OFF;	/* no error handling in led class :( */
5816 	else
5817 		rc = LED_FULL;
5818 
5819 	return rc;
5820 }
5821 
5822 static void led_exit(void)
5823 {
5824 	unsigned int i;
5825 
5826 	for (i = 0; i < TPACPI_LED_NUMLEDS; i++)
5827 		led_classdev_unregister(&tpacpi_leds[i].led_classdev);
5828 
5829 	kfree(tpacpi_leds);
5830 }
5831 
5832 static int __init tpacpi_init_led(unsigned int led)
5833 {
5834 	/* LEDs with no name don't get registered */
5835 	if (!tpacpi_led_names[led])
5836 		return 0;
5837 
5838 	tpacpi_leds[led].led_classdev.brightness_set_blocking = &led_sysfs_set;
5839 	tpacpi_leds[led].led_classdev.blink_set = &led_sysfs_blink_set;
5840 	if (led_supported == TPACPI_LED_570)
5841 		tpacpi_leds[led].led_classdev.brightness_get = &led_sysfs_get;
5842 
5843 	tpacpi_leds[led].led_classdev.name = tpacpi_led_names[led];
5844 	tpacpi_leds[led].led_classdev.flags = LED_RETAIN_AT_SHUTDOWN;
5845 	tpacpi_leds[led].led = led;
5846 
5847 	return led_classdev_register(&tpacpi_pdev->dev, &tpacpi_leds[led].led_classdev);
5848 }
5849 
5850 static const struct tpacpi_quirk led_useful_qtable[] __initconst = {
5851 	TPACPI_Q_IBM('1', 'E', 0x009f), /* A30 */
5852 	TPACPI_Q_IBM('1', 'N', 0x009f), /* A31 */
5853 	TPACPI_Q_IBM('1', 'G', 0x009f), /* A31 */
5854 
5855 	TPACPI_Q_IBM('1', 'I', 0x0097), /* T30 */
5856 	TPACPI_Q_IBM('1', 'R', 0x0097), /* T40, T41, T42, R50, R51 */
5857 	TPACPI_Q_IBM('7', '0', 0x0097), /* T43, R52 */
5858 	TPACPI_Q_IBM('1', 'Y', 0x0097), /* T43 */
5859 	TPACPI_Q_IBM('1', 'W', 0x0097), /* R50e */
5860 	TPACPI_Q_IBM('1', 'V', 0x0097), /* R51 */
5861 	TPACPI_Q_IBM('7', '8', 0x0097), /* R51e */
5862 	TPACPI_Q_IBM('7', '6', 0x0097), /* R52 */
5863 
5864 	TPACPI_Q_IBM('1', 'K', 0x00bf), /* X30 */
5865 	TPACPI_Q_IBM('1', 'Q', 0x00bf), /* X31, X32 */
5866 	TPACPI_Q_IBM('1', 'U', 0x00bf), /* X40 */
5867 	TPACPI_Q_IBM('7', '4', 0x00bf), /* X41 */
5868 	TPACPI_Q_IBM('7', '5', 0x00bf), /* X41t */
5869 
5870 	TPACPI_Q_IBM('7', '9', 0x1f97), /* T60 (1) */
5871 	TPACPI_Q_IBM('7', '7', 0x1f97), /* Z60* (1) */
5872 	TPACPI_Q_IBM('7', 'F', 0x1f97), /* Z61* (1) */
5873 	TPACPI_Q_IBM('7', 'B', 0x1fb7), /* X60 (1) */
5874 
5875 	/* (1) - may have excess leds enabled on MSB */
5876 
5877 	/* Defaults (order matters, keep last, don't reorder!) */
5878 	{ /* Lenovo */
5879 	  .vendor = PCI_VENDOR_ID_LENOVO,
5880 	  .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
5881 	  .quirks = 0x1fffU,
5882 	},
5883 	{ /* IBM ThinkPads with no EC version string */
5884 	  .vendor = PCI_VENDOR_ID_IBM,
5885 	  .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_UNKNOWN,
5886 	  .quirks = 0x00ffU,
5887 	},
5888 	{ /* IBM ThinkPads with EC version string */
5889 	  .vendor = PCI_VENDOR_ID_IBM,
5890 	  .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
5891 	  .quirks = 0x00bfU,
5892 	},
5893 };
5894 
5895 static enum led_access_mode __init led_init_detect_mode(void)
5896 {
5897 	acpi_status status;
5898 
5899 	if (tpacpi_is_ibm()) {
5900 		/* 570 */
5901 		status = acpi_get_handle(ec_handle, "SLED", &led_handle);
5902 		if (ACPI_SUCCESS(status))
5903 			return TPACPI_LED_570;
5904 
5905 		/* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
5906 		status = acpi_get_handle(ec_handle, "SYSL", &led_handle);
5907 		if (ACPI_SUCCESS(status))
5908 			return TPACPI_LED_OLD;
5909 	}
5910 
5911 	/* most others */
5912 	status = acpi_get_handle(ec_handle, "LED", &led_handle);
5913 	if (ACPI_SUCCESS(status))
5914 		return TPACPI_LED_NEW;
5915 
5916 	/* R30, R31, and unknown firmwares */
5917 	led_handle = NULL;
5918 	return TPACPI_LED_NONE;
5919 }
5920 
5921 static int __init led_init(struct ibm_init_struct *iibm)
5922 {
5923 	unsigned int i;
5924 	int rc;
5925 	unsigned long useful_leds;
5926 
5927 	vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
5928 
5929 	led_supported = led_init_detect_mode();
5930 
5931 	if (led_supported != TPACPI_LED_NONE) {
5932 		useful_leds = tpacpi_check_quirks(led_useful_qtable,
5933 				ARRAY_SIZE(led_useful_qtable));
5934 
5935 		if (!useful_leds) {
5936 			led_handle = NULL;
5937 			led_supported = TPACPI_LED_NONE;
5938 		}
5939 	}
5940 
5941 	vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
5942 		str_supported(led_supported), led_supported);
5943 
5944 	if (led_supported == TPACPI_LED_NONE)
5945 		return -ENODEV;
5946 
5947 	tpacpi_leds = kcalloc(TPACPI_LED_NUMLEDS, sizeof(*tpacpi_leds),
5948 			      GFP_KERNEL);
5949 	if (!tpacpi_leds) {
5950 		pr_err("Out of memory for LED data\n");
5951 		return -ENOMEM;
5952 	}
5953 
5954 	for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
5955 		tpacpi_leds[i].led = -1;
5956 
5957 		if (!tpacpi_is_led_restricted(i) && test_bit(i, &useful_leds)) {
5958 			rc = tpacpi_init_led(i);
5959 			if (rc < 0) {
5960 				led_exit();
5961 				return rc;
5962 			}
5963 		}
5964 	}
5965 
5966 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
5967 	pr_notice("warning: userspace override of important firmware LEDs is enabled\n");
5968 #endif
5969 	return 0;
5970 }
5971 
5972 #define str_led_status(s)	((s) >= TPACPI_LED_BLINK ? "blinking" : str_on_off(s))
5973 
5974 static int led_read(struct seq_file *m)
5975 {
5976 	if (!led_supported) {
5977 		seq_printf(m, "status:\t\tnot supported\n");
5978 		return 0;
5979 	}
5980 	seq_printf(m, "status:\t\tsupported\n");
5981 
5982 	if (led_supported == TPACPI_LED_570) {
5983 		/* 570 */
5984 		int i, status;
5985 		for (i = 0; i < 8; i++) {
5986 			status = led_get_status(i);
5987 			if (status < 0)
5988 				return -EIO;
5989 			seq_printf(m, "%d:\t\t%s\n", i, str_led_status(status));
5990 		}
5991 	}
5992 
5993 	seq_printf(m, "commands:\t<led> on, <led> off, <led> blink (<led> is 0-15)\n");
5994 
5995 	return 0;
5996 }
5997 
5998 static int led_write(char *buf)
5999 {
6000 	char *cmd;
6001 	int led, rc;
6002 	enum led_status_t s;
6003 
6004 	if (!led_supported)
6005 		return -ENODEV;
6006 
6007 	while ((cmd = strsep(&buf, ","))) {
6008 		if (sscanf(cmd, "%d", &led) != 1)
6009 			return -EINVAL;
6010 
6011 		if (led < 0 || led > (TPACPI_LED_NUMLEDS - 1))
6012 			return -ENODEV;
6013 
6014 		if (tpacpi_leds[led].led < 0)
6015 			return -ENODEV;
6016 
6017 		if (strstr(cmd, "off")) {
6018 			s = TPACPI_LED_OFF;
6019 		} else if (strstr(cmd, "on")) {
6020 			s = TPACPI_LED_ON;
6021 		} else if (strstr(cmd, "blink")) {
6022 			s = TPACPI_LED_BLINK;
6023 		} else {
6024 			return -EINVAL;
6025 		}
6026 
6027 		rc = led_set_status(led, s);
6028 		if (rc < 0)
6029 			return rc;
6030 	}
6031 
6032 	return 0;
6033 }
6034 
6035 static struct ibm_struct led_driver_data = {
6036 	.name = "led",
6037 	.read = led_read,
6038 	.write = led_write,
6039 	.exit = led_exit,
6040 };
6041 
6042 /*************************************************************************
6043  * Beep subdriver
6044  */
6045 
6046 TPACPI_HANDLE(beep, ec, "BEEP");	/* all except R30, R31 */
6047 
6048 #define TPACPI_BEEP_Q1 0x0001
6049 
6050 static const struct tpacpi_quirk beep_quirk_table[] __initconst = {
6051 	TPACPI_Q_IBM('I', 'M', TPACPI_BEEP_Q1), /* 570 */
6052 	TPACPI_Q_IBM('I', 'U', TPACPI_BEEP_Q1), /* 570E - unverified */
6053 };
6054 
6055 static int __init beep_init(struct ibm_init_struct *iibm)
6056 {
6057 	unsigned long quirks;
6058 
6059 	vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
6060 
6061 	TPACPI_ACPIHANDLE_INIT(beep);
6062 
6063 	vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
6064 		str_supported(beep_handle != NULL));
6065 
6066 	quirks = tpacpi_check_quirks(beep_quirk_table,
6067 				     ARRAY_SIZE(beep_quirk_table));
6068 
6069 	tp_features.beep_needs_two_args = !!(quirks & TPACPI_BEEP_Q1);
6070 
6071 	return (beep_handle) ? 0 : -ENODEV;
6072 }
6073 
6074 static int beep_read(struct seq_file *m)
6075 {
6076 	if (!beep_handle)
6077 		seq_printf(m, "status:\t\tnot supported\n");
6078 	else {
6079 		seq_printf(m, "status:\t\tsupported\n");
6080 		seq_printf(m, "commands:\t<cmd> (<cmd> is 0-17)\n");
6081 	}
6082 
6083 	return 0;
6084 }
6085 
6086 static int beep_write(char *buf)
6087 {
6088 	char *cmd;
6089 	int beep_cmd;
6090 
6091 	if (!beep_handle)
6092 		return -ENODEV;
6093 
6094 	while ((cmd = strsep(&buf, ","))) {
6095 		if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
6096 		    beep_cmd >= 0 && beep_cmd <= 17) {
6097 			/* beep_cmd set */
6098 		} else
6099 			return -EINVAL;
6100 		if (tp_features.beep_needs_two_args) {
6101 			if (!acpi_evalf(beep_handle, NULL, NULL, "vdd",
6102 					beep_cmd, 0))
6103 				return -EIO;
6104 		} else {
6105 			if (!acpi_evalf(beep_handle, NULL, NULL, "vd",
6106 					beep_cmd))
6107 				return -EIO;
6108 		}
6109 	}
6110 
6111 	return 0;
6112 }
6113 
6114 static struct ibm_struct beep_driver_data = {
6115 	.name = "beep",
6116 	.read = beep_read,
6117 	.write = beep_write,
6118 };
6119 
6120 /*************************************************************************
6121  * Thermal subdriver
6122  */
6123 
6124 enum thermal_access_mode {
6125 	TPACPI_THERMAL_NONE = 0,	/* No thermal support */
6126 	TPACPI_THERMAL_ACPI_TMP07,	/* Use ACPI TMP0-7 */
6127 	TPACPI_THERMAL_ACPI_UPDT,	/* Use ACPI TMP0-7 with UPDT */
6128 	TPACPI_THERMAL_TPEC_8,		/* Use ACPI EC regs, 8 sensors */
6129 	TPACPI_THERMAL_TPEC_16,		/* Use ACPI EC regs, 16 sensors */
6130 };
6131 
6132 enum { /* TPACPI_THERMAL_TPEC_* */
6133 	TP_EC_THERMAL_TMP0 = 0x78,	/* ACPI EC regs TMP 0..7 */
6134 	TP_EC_THERMAL_TMP8 = 0xC0,	/* ACPI EC regs TMP 8..15 */
6135 	TP_EC_FUNCREV      = 0xEF,      /* ACPI EC Functional revision */
6136 	TP_EC_THERMAL_TMP_NA = -128,	/* ACPI EC sensor not available */
6137 
6138 	TPACPI_THERMAL_SENSOR_NA = -128000, /* Sensor not available */
6139 };
6140 
6141 
6142 #define TPACPI_MAX_THERMAL_SENSORS 16	/* Max thermal sensors supported */
6143 struct ibm_thermal_sensors_struct {
6144 	s32 temp[TPACPI_MAX_THERMAL_SENSORS];
6145 };
6146 
6147 static enum thermal_access_mode thermal_read_mode;
6148 static bool thermal_use_labels;
6149 
6150 /* idx is zero-based */
6151 static int thermal_get_sensor(int idx, s32 *value)
6152 {
6153 	int t;
6154 	s8 tmp;
6155 	char tmpi[5];
6156 
6157 	t = TP_EC_THERMAL_TMP0;
6158 
6159 	switch (thermal_read_mode) {
6160 #if TPACPI_MAX_THERMAL_SENSORS >= 16
6161 	case TPACPI_THERMAL_TPEC_16:
6162 		if (idx >= 8 && idx <= 15) {
6163 			t = TP_EC_THERMAL_TMP8;
6164 			idx -= 8;
6165 		}
6166 #endif
6167 		fallthrough;
6168 	case TPACPI_THERMAL_TPEC_8:
6169 		if (idx <= 7) {
6170 			if (!acpi_ec_read(t + idx, &tmp))
6171 				return -EIO;
6172 			*value = tmp * 1000;
6173 			return 0;
6174 		}
6175 		break;
6176 
6177 	case TPACPI_THERMAL_ACPI_UPDT:
6178 		if (idx <= 7) {
6179 			snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
6180 			if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
6181 				return -EIO;
6182 			if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
6183 				return -EIO;
6184 			*value = (t - 2732) * 100;
6185 			return 0;
6186 		}
6187 		break;
6188 
6189 	case TPACPI_THERMAL_ACPI_TMP07:
6190 		if (idx <= 7) {
6191 			snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
6192 			if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
6193 				return -EIO;
6194 			if (t > 127 || t < -127)
6195 				t = TP_EC_THERMAL_TMP_NA;
6196 			*value = t * 1000;
6197 			return 0;
6198 		}
6199 		break;
6200 
6201 	case TPACPI_THERMAL_NONE:
6202 	default:
6203 		return -ENOSYS;
6204 	}
6205 
6206 	return -EINVAL;
6207 }
6208 
6209 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
6210 {
6211 	int res, i;
6212 	int n;
6213 
6214 	n = 8;
6215 	i = 0;
6216 
6217 	if (!s)
6218 		return -EINVAL;
6219 
6220 	if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
6221 		n = 16;
6222 
6223 	for (i = 0 ; i < n; i++) {
6224 		res = thermal_get_sensor(i, &s->temp[i]);
6225 		if (res)
6226 			return res;
6227 	}
6228 
6229 	return n;
6230 }
6231 
6232 static void thermal_dump_all_sensors(void)
6233 {
6234 	int n, i;
6235 	struct ibm_thermal_sensors_struct t;
6236 
6237 	n = thermal_get_sensors(&t);
6238 	if (n <= 0)
6239 		return;
6240 
6241 	pr_notice("temperatures (Celsius):");
6242 
6243 	for (i = 0; i < n; i++) {
6244 		if (t.temp[i] != TPACPI_THERMAL_SENSOR_NA)
6245 			pr_cont(" %d", (int)(t.temp[i] / 1000));
6246 		else
6247 			pr_cont(" N/A");
6248 	}
6249 
6250 	pr_cont("\n");
6251 }
6252 
6253 /* sysfs temp##_input -------------------------------------------------- */
6254 
6255 static ssize_t thermal_temp_input_show(struct device *dev,
6256 			   struct device_attribute *attr,
6257 			   char *buf)
6258 {
6259 	struct sensor_device_attribute *sensor_attr =
6260 					to_sensor_dev_attr(attr);
6261 	int idx = sensor_attr->index;
6262 	s32 value;
6263 	int res;
6264 
6265 	res = thermal_get_sensor(idx, &value);
6266 	if (res)
6267 		return res;
6268 	if (value == TPACPI_THERMAL_SENSOR_NA)
6269 		return -ENXIO;
6270 
6271 	return sysfs_emit(buf, "%d\n", value);
6272 }
6273 
6274 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
6275 	 SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \
6276 		     thermal_temp_input_show, NULL, _idxB)
6277 
6278 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
6279 	THERMAL_SENSOR_ATTR_TEMP(1, 0),
6280 	THERMAL_SENSOR_ATTR_TEMP(2, 1),
6281 	THERMAL_SENSOR_ATTR_TEMP(3, 2),
6282 	THERMAL_SENSOR_ATTR_TEMP(4, 3),
6283 	THERMAL_SENSOR_ATTR_TEMP(5, 4),
6284 	THERMAL_SENSOR_ATTR_TEMP(6, 5),
6285 	THERMAL_SENSOR_ATTR_TEMP(7, 6),
6286 	THERMAL_SENSOR_ATTR_TEMP(8, 7),
6287 	THERMAL_SENSOR_ATTR_TEMP(9, 8),
6288 	THERMAL_SENSOR_ATTR_TEMP(10, 9),
6289 	THERMAL_SENSOR_ATTR_TEMP(11, 10),
6290 	THERMAL_SENSOR_ATTR_TEMP(12, 11),
6291 	THERMAL_SENSOR_ATTR_TEMP(13, 12),
6292 	THERMAL_SENSOR_ATTR_TEMP(14, 13),
6293 	THERMAL_SENSOR_ATTR_TEMP(15, 14),
6294 	THERMAL_SENSOR_ATTR_TEMP(16, 15),
6295 };
6296 
6297 #define THERMAL_ATTRS(X) \
6298 	&sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
6299 
6300 static struct attribute *thermal_temp_input_attr[] = {
6301 	THERMAL_ATTRS(0),
6302 	THERMAL_ATTRS(1),
6303 	THERMAL_ATTRS(2),
6304 	THERMAL_ATTRS(3),
6305 	THERMAL_ATTRS(4),
6306 	THERMAL_ATTRS(5),
6307 	THERMAL_ATTRS(6),
6308 	THERMAL_ATTRS(7),
6309 	THERMAL_ATTRS(8),
6310 	THERMAL_ATTRS(9),
6311 	THERMAL_ATTRS(10),
6312 	THERMAL_ATTRS(11),
6313 	THERMAL_ATTRS(12),
6314 	THERMAL_ATTRS(13),
6315 	THERMAL_ATTRS(14),
6316 	THERMAL_ATTRS(15),
6317 	NULL
6318 };
6319 
6320 static umode_t thermal_attr_is_visible(struct kobject *kobj,
6321 				       struct attribute *attr, int n)
6322 {
6323 	if (thermal_read_mode == TPACPI_THERMAL_NONE)
6324 		return 0;
6325 
6326 	if (attr == THERMAL_ATTRS(8) || attr == THERMAL_ATTRS(9) ||
6327 	    attr == THERMAL_ATTRS(10) || attr == THERMAL_ATTRS(11) ||
6328 	    attr == THERMAL_ATTRS(12) || attr == THERMAL_ATTRS(13) ||
6329 	    attr == THERMAL_ATTRS(14) || attr == THERMAL_ATTRS(15)) {
6330 		if (thermal_read_mode != TPACPI_THERMAL_TPEC_16)
6331 			return 0;
6332 	}
6333 
6334 	return attr->mode;
6335 }
6336 
6337 static const struct attribute_group thermal_attr_group = {
6338 	.is_visible = thermal_attr_is_visible,
6339 	.attrs = thermal_temp_input_attr,
6340 };
6341 
6342 #undef THERMAL_SENSOR_ATTR_TEMP
6343 #undef THERMAL_ATTRS
6344 
6345 static ssize_t temp1_label_show(struct device *dev, struct device_attribute *attr, char *buf)
6346 {
6347 	return sysfs_emit(buf, "CPU\n");
6348 }
6349 static DEVICE_ATTR_RO(temp1_label);
6350 
6351 static ssize_t temp2_label_show(struct device *dev, struct device_attribute *attr, char *buf)
6352 {
6353 	return sysfs_emit(buf, "GPU\n");
6354 }
6355 static DEVICE_ATTR_RO(temp2_label);
6356 
6357 static struct attribute *temp_label_attributes[] = {
6358 	&dev_attr_temp1_label.attr,
6359 	&dev_attr_temp2_label.attr,
6360 	NULL
6361 };
6362 
6363 static umode_t temp_label_attr_is_visible(struct kobject *kobj,
6364 					  struct attribute *attr, int n)
6365 {
6366 	return thermal_use_labels ? attr->mode : 0;
6367 }
6368 
6369 static const struct attribute_group temp_label_attr_group = {
6370 	.is_visible = temp_label_attr_is_visible,
6371 	.attrs = temp_label_attributes,
6372 };
6373 
6374 /* --------------------------------------------------------------------- */
6375 
6376 static int __init thermal_init(struct ibm_init_struct *iibm)
6377 {
6378 	u8 t, ta1, ta2, ver = 0;
6379 	int i;
6380 	int acpi_tmp7;
6381 
6382 	vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
6383 
6384 	acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
6385 
6386 	if (thinkpad_id.ec_model) {
6387 		/*
6388 		 * Direct EC access mode: sensors at registers
6389 		 * 0x78-0x7F, 0xC0-0xC7.  Registers return 0x00 for
6390 		 * non-implemented, thermal sensors return 0x80 when
6391 		 * not available
6392 		 * The above rule is unfortunately flawed. This has been seen with
6393 		 * 0xC2 (power supply ID) causing thermal control problems.
6394 		 * The EC version can be determined by offset 0xEF and at least for
6395 		 * version 3 the Lenovo firmware team confirmed that registers 0xC0-0xC7
6396 		 * are not thermal registers.
6397 		 */
6398 		if (!acpi_ec_read(TP_EC_FUNCREV, &ver))
6399 			pr_warn("Thinkpad ACPI EC unable to access EC version\n");
6400 
6401 		ta1 = ta2 = 0;
6402 		for (i = 0; i < 8; i++) {
6403 			if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
6404 				ta1 |= t;
6405 			} else {
6406 				ta1 = 0;
6407 				break;
6408 			}
6409 			if (ver < 3) {
6410 				if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
6411 					ta2 |= t;
6412 				} else {
6413 					ta1 = 0;
6414 					break;
6415 				}
6416 			}
6417 		}
6418 		if (ta1 == 0) {
6419 			/* This is sheer paranoia, but we handle it anyway */
6420 			if (acpi_tmp7) {
6421 				pr_err("ThinkPad ACPI EC access misbehaving, falling back to ACPI TMPx access mode\n");
6422 				thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
6423 			} else {
6424 				pr_err("ThinkPad ACPI EC access misbehaving, disabling thermal sensors access\n");
6425 				thermal_read_mode = TPACPI_THERMAL_NONE;
6426 			}
6427 		} else {
6428 			if (ver >= 3) {
6429 				thermal_read_mode = TPACPI_THERMAL_TPEC_8;
6430 				thermal_use_labels = true;
6431 			} else {
6432 				thermal_read_mode =
6433 					(ta2 != 0) ?
6434 					TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
6435 			}
6436 		}
6437 	} else if (acpi_tmp7) {
6438 		if (tpacpi_is_ibm() &&
6439 		    acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
6440 			/* 600e/x, 770e, 770x */
6441 			thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
6442 		} else {
6443 			/* IBM/LENOVO DSDT EC.TMPx access, max 8 sensors */
6444 			thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
6445 		}
6446 	} else {
6447 		/* temperatures not supported on 570, G4x, R30, R31, R32 */
6448 		thermal_read_mode = TPACPI_THERMAL_NONE;
6449 	}
6450 
6451 	vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
6452 		str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
6453 		thermal_read_mode);
6454 
6455 	return thermal_read_mode != TPACPI_THERMAL_NONE ? 0 : -ENODEV;
6456 }
6457 
6458 static int thermal_read(struct seq_file *m)
6459 {
6460 	int n, i;
6461 	struct ibm_thermal_sensors_struct t;
6462 
6463 	n = thermal_get_sensors(&t);
6464 	if (unlikely(n < 0))
6465 		return n;
6466 
6467 	seq_printf(m, "temperatures:\t");
6468 
6469 	if (n > 0) {
6470 		for (i = 0; i < (n - 1); i++)
6471 			seq_printf(m, "%d ", t.temp[i] / 1000);
6472 		seq_printf(m, "%d\n", t.temp[i] / 1000);
6473 	} else
6474 		seq_printf(m, "not supported\n");
6475 
6476 	return 0;
6477 }
6478 
6479 static struct ibm_struct thermal_driver_data = {
6480 	.name = "thermal",
6481 	.read = thermal_read,
6482 };
6483 
6484 /*************************************************************************
6485  * Backlight/brightness subdriver
6486  */
6487 
6488 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
6489 
6490 /*
6491  * ThinkPads can read brightness from two places: EC HBRV (0x31), or
6492  * CMOS NVRAM byte 0x5E, bits 0-3.
6493  *
6494  * EC HBRV (0x31) has the following layout
6495  *   Bit 7: unknown function
6496  *   Bit 6: unknown function
6497  *   Bit 5: Z: honour scale changes, NZ: ignore scale changes
6498  *   Bit 4: must be set to zero to avoid problems
6499  *   Bit 3-0: backlight brightness level
6500  *
6501  * brightness_get_raw returns status data in the HBRV layout
6502  *
6503  * WARNING: The X61 has been verified to use HBRV for something else, so
6504  * this should be used _only_ on IBM ThinkPads, and maybe with some careful
6505  * testing on the very early *60 Lenovo models...
6506  */
6507 
6508 enum {
6509 	TP_EC_BACKLIGHT = 0x31,
6510 
6511 	/* TP_EC_BACKLIGHT bitmasks */
6512 	TP_EC_BACKLIGHT_LVLMSK = 0x1F,
6513 	TP_EC_BACKLIGHT_CMDMSK = 0xE0,
6514 	TP_EC_BACKLIGHT_MAPSW = 0x20,
6515 };
6516 
6517 enum tpacpi_brightness_access_mode {
6518 	TPACPI_BRGHT_MODE_AUTO = 0,	/* Not implemented yet */
6519 	TPACPI_BRGHT_MODE_EC,		/* EC control */
6520 	TPACPI_BRGHT_MODE_UCMS_STEP,	/* UCMS step-based control */
6521 	TPACPI_BRGHT_MODE_ECNVRAM,	/* EC control w/ NVRAM store */
6522 	TPACPI_BRGHT_MODE_MAX
6523 };
6524 
6525 static struct backlight_device *ibm_backlight_device;
6526 
6527 static enum tpacpi_brightness_access_mode brightness_mode =
6528 		TPACPI_BRGHT_MODE_MAX;
6529 
6530 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
6531 
6532 static struct mutex brightness_mutex;
6533 
6534 /* NVRAM brightness access */
6535 static unsigned int tpacpi_brightness_nvram_get(void)
6536 {
6537 	u8 lnvram;
6538 
6539 	lockdep_assert_held(&brightness_mutex);
6540 
6541 	lnvram = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
6542 		  & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
6543 		  >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
6544 	lnvram &= bright_maxlvl;
6545 
6546 	return lnvram;
6547 }
6548 
6549 static void tpacpi_brightness_checkpoint_nvram(void)
6550 {
6551 	u8 lec = 0;
6552 	u8 b_nvram;
6553 
6554 	if (brightness_mode != TPACPI_BRGHT_MODE_ECNVRAM)
6555 		return;
6556 
6557 	vdbg_printk(TPACPI_DBG_BRGHT,
6558 		"trying to checkpoint backlight level to NVRAM...\n");
6559 
6560 	if (mutex_lock_killable(&brightness_mutex) < 0)
6561 		return;
6562 
6563 	if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
6564 		goto unlock;
6565 	lec &= TP_EC_BACKLIGHT_LVLMSK;
6566 	b_nvram = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
6567 
6568 	if (lec != ((b_nvram & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
6569 			     >> TP_NVRAM_POS_LEVEL_BRIGHTNESS)) {
6570 		/* NVRAM needs update */
6571 		b_nvram &= ~(TP_NVRAM_MASK_LEVEL_BRIGHTNESS <<
6572 				TP_NVRAM_POS_LEVEL_BRIGHTNESS);
6573 		b_nvram |= lec;
6574 		nvram_write_byte(b_nvram, TP_NVRAM_ADDR_BRIGHTNESS);
6575 		dbg_printk(TPACPI_DBG_BRGHT,
6576 			   "updated NVRAM backlight level to %u (0x%02x)\n",
6577 			   (unsigned int) lec, (unsigned int) b_nvram);
6578 	} else
6579 		vdbg_printk(TPACPI_DBG_BRGHT,
6580 			   "NVRAM backlight level already is %u (0x%02x)\n",
6581 			   (unsigned int) lec, (unsigned int) b_nvram);
6582 
6583 unlock:
6584 	mutex_unlock(&brightness_mutex);
6585 }
6586 
6587 
6588 static int tpacpi_brightness_get_raw(int *status)
6589 {
6590 	u8 lec = 0;
6591 
6592 	lockdep_assert_held(&brightness_mutex);
6593 
6594 	switch (brightness_mode) {
6595 	case TPACPI_BRGHT_MODE_UCMS_STEP:
6596 		*status = tpacpi_brightness_nvram_get();
6597 		return 0;
6598 	case TPACPI_BRGHT_MODE_EC:
6599 	case TPACPI_BRGHT_MODE_ECNVRAM:
6600 		if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
6601 			return -EIO;
6602 		*status = lec;
6603 		return 0;
6604 	default:
6605 		return -ENXIO;
6606 	}
6607 }
6608 
6609 /* do NOT call with illegal backlight level value */
6610 static int tpacpi_brightness_set_ec(unsigned int value)
6611 {
6612 	u8 lec = 0;
6613 
6614 	lockdep_assert_held(&brightness_mutex);
6615 
6616 	if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
6617 		return -EIO;
6618 
6619 	if (unlikely(!acpi_ec_write(TP_EC_BACKLIGHT,
6620 				(lec & TP_EC_BACKLIGHT_CMDMSK) |
6621 				(value & TP_EC_BACKLIGHT_LVLMSK))))
6622 		return -EIO;
6623 
6624 	return 0;
6625 }
6626 
6627 static int tpacpi_brightness_set_ucmsstep(unsigned int value)
6628 {
6629 	int cmos_cmd, inc;
6630 	unsigned int current_value, i;
6631 
6632 	lockdep_assert_held(&brightness_mutex);
6633 
6634 	current_value = tpacpi_brightness_nvram_get();
6635 
6636 	if (value == current_value)
6637 		return 0;
6638 
6639 	cmos_cmd = (value > current_value) ?
6640 			TP_CMOS_BRIGHTNESS_UP :
6641 			TP_CMOS_BRIGHTNESS_DOWN;
6642 	inc = (value > current_value) ? 1 : -1;
6643 
6644 	for (i = current_value; i != value; i += inc)
6645 		if (issue_thinkpad_cmos_command(cmos_cmd))
6646 			return -EIO;
6647 
6648 	return 0;
6649 }
6650 
6651 /* May return EINTR which can always be mapped to ERESTARTSYS */
6652 static int brightness_set(unsigned int value)
6653 {
6654 	int res;
6655 
6656 	if (value > bright_maxlvl)
6657 		return -EINVAL;
6658 
6659 	vdbg_printk(TPACPI_DBG_BRGHT,
6660 			"set backlight level to %d\n", value);
6661 
6662 	res = mutex_lock_killable(&brightness_mutex);
6663 	if (res < 0)
6664 		return res;
6665 
6666 	switch (brightness_mode) {
6667 	case TPACPI_BRGHT_MODE_EC:
6668 	case TPACPI_BRGHT_MODE_ECNVRAM:
6669 		res = tpacpi_brightness_set_ec(value);
6670 		break;
6671 	case TPACPI_BRGHT_MODE_UCMS_STEP:
6672 		res = tpacpi_brightness_set_ucmsstep(value);
6673 		break;
6674 	default:
6675 		res = -ENXIO;
6676 	}
6677 
6678 	mutex_unlock(&brightness_mutex);
6679 	return res;
6680 }
6681 
6682 /* sysfs backlight class ----------------------------------------------- */
6683 
6684 static int brightness_update_status(struct backlight_device *bd)
6685 {
6686 	int level = backlight_get_brightness(bd);
6687 
6688 	dbg_printk(TPACPI_DBG_BRGHT,
6689 			"backlight: attempt to set level to %d\n",
6690 			level);
6691 
6692 	/* it is the backlight class's job (caller) to handle
6693 	 * EINTR and other errors properly */
6694 	return brightness_set(level);
6695 }
6696 
6697 static int brightness_get(struct backlight_device *bd)
6698 {
6699 	int status, res;
6700 
6701 	res = mutex_lock_killable(&brightness_mutex);
6702 	if (res < 0)
6703 		return 0;
6704 
6705 	res = tpacpi_brightness_get_raw(&status);
6706 
6707 	mutex_unlock(&brightness_mutex);
6708 
6709 	if (res < 0)
6710 		return 0;
6711 
6712 	return status & TP_EC_BACKLIGHT_LVLMSK;
6713 }
6714 
6715 static void tpacpi_brightness_notify_change(void)
6716 {
6717 	backlight_force_update(ibm_backlight_device,
6718 			       BACKLIGHT_UPDATE_HOTKEY);
6719 }
6720 
6721 static const struct backlight_ops ibm_backlight_data = {
6722 	.get_brightness = brightness_get,
6723 	.update_status  = brightness_update_status,
6724 };
6725 
6726 /* --------------------------------------------------------------------- */
6727 
6728 static int __init tpacpi_evaluate_bcl(struct acpi_device *adev, void *not_used)
6729 {
6730 	struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
6731 	union acpi_object *obj;
6732 	acpi_status status;
6733 	int rc;
6734 
6735 	status = acpi_evaluate_object(adev->handle, "_BCL", NULL, &buffer);
6736 	if (ACPI_FAILURE(status))
6737 		return 0;
6738 
6739 	obj = buffer.pointer;
6740 	if (!obj || obj->type != ACPI_TYPE_PACKAGE) {
6741 		acpi_handle_info(adev->handle,
6742 				 "Unknown _BCL data, please report this to %s\n",
6743 				 TPACPI_MAIL);
6744 		rc = 0;
6745 	} else {
6746 		rc = obj->package.count;
6747 	}
6748 	kfree(obj);
6749 
6750 	return rc;
6751 }
6752 
6753 /*
6754  * Call _BCL method of video device.  On some ThinkPads this will
6755  * switch the firmware to the ACPI brightness control mode.
6756  */
6757 
6758 static int __init tpacpi_query_bcl_levels(acpi_handle handle)
6759 {
6760 	struct acpi_device *device;
6761 
6762 	device = acpi_fetch_acpi_dev(handle);
6763 	if (!device)
6764 		return 0;
6765 
6766 	return acpi_dev_for_each_child(device, tpacpi_evaluate_bcl, NULL);
6767 }
6768 
6769 
6770 /*
6771  * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map
6772  */
6773 static unsigned int __init tpacpi_check_std_acpi_brightness_support(void)
6774 {
6775 	acpi_handle video_device;
6776 	int bcl_levels = 0;
6777 
6778 	tpacpi_acpi_handle_locate("video", NULL, &video_device);
6779 	if (video_device)
6780 		bcl_levels = tpacpi_query_bcl_levels(video_device);
6781 
6782 	tp_features.bright_acpimode = (bcl_levels > 0);
6783 
6784 	return (bcl_levels > 2) ? (bcl_levels - 2) : 0;
6785 }
6786 
6787 /*
6788  * These are only useful for models that have only one possibility
6789  * of GPU.  If the BIOS model handles both ATI and Intel, don't use
6790  * these quirks.
6791  */
6792 #define TPACPI_BRGHT_Q_NOEC	0x0001	/* Must NOT use EC HBRV */
6793 #define TPACPI_BRGHT_Q_EC	0x0002  /* Should or must use EC HBRV */
6794 #define TPACPI_BRGHT_Q_ASK	0x8000	/* Ask for user report */
6795 
6796 static const struct tpacpi_quirk brightness_quirk_table[] __initconst = {
6797 	/* Models with ATI GPUs known to require ECNVRAM mode */
6798 	TPACPI_Q_IBM('1', 'Y', TPACPI_BRGHT_Q_EC),	/* T43/p ATI */
6799 
6800 	/* Models with ATI GPUs that can use ECNVRAM */
6801 	TPACPI_Q_IBM('1', 'R', TPACPI_BRGHT_Q_EC),	/* R50,51 T40-42 */
6802 	TPACPI_Q_IBM('1', 'Q', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6803 	TPACPI_Q_IBM('7', '6', TPACPI_BRGHT_Q_EC),	/* R52 */
6804 	TPACPI_Q_IBM('7', '8', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6805 
6806 	/* Models with Intel Extreme Graphics 2 */
6807 	TPACPI_Q_IBM('1', 'U', TPACPI_BRGHT_Q_NOEC),	/* X40 */
6808 	TPACPI_Q_IBM('1', 'V', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6809 	TPACPI_Q_IBM('1', 'W', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6810 
6811 	/* Models with Intel GMA900 */
6812 	TPACPI_Q_IBM('7', '0', TPACPI_BRGHT_Q_NOEC),	/* T43, R52 */
6813 	TPACPI_Q_IBM('7', '4', TPACPI_BRGHT_Q_NOEC),	/* X41 */
6814 	TPACPI_Q_IBM('7', '5', TPACPI_BRGHT_Q_NOEC),	/* X41 Tablet */
6815 };
6816 
6817 /*
6818  * Returns < 0 for error, otherwise sets tp_features.bright_*
6819  * and bright_maxlvl.
6820  */
6821 static void __init tpacpi_detect_brightness_capabilities(void)
6822 {
6823 	unsigned int b;
6824 
6825 	vdbg_printk(TPACPI_DBG_INIT,
6826 		    "detecting firmware brightness interface capabilities\n");
6827 
6828 	/* we could run a quirks check here (same table used by
6829 	 * brightness_init) if needed */
6830 
6831 	/*
6832 	 * We always attempt to detect acpi support, so as to switch
6833 	 * Lenovo Vista BIOS to ACPI brightness mode even if we are not
6834 	 * going to publish a backlight interface
6835 	 */
6836 	b = tpacpi_check_std_acpi_brightness_support();
6837 	switch (b) {
6838 	case 16:
6839 		bright_maxlvl = 15;
6840 		break;
6841 	case 8:
6842 	case 0:
6843 		bright_maxlvl = 7;
6844 		break;
6845 	default:
6846 		tp_features.bright_unkfw = 1;
6847 		bright_maxlvl = b - 1;
6848 	}
6849 	pr_debug("detected %u brightness levels\n", bright_maxlvl + 1);
6850 }
6851 
6852 static int __init brightness_init(struct ibm_init_struct *iibm)
6853 {
6854 	struct backlight_properties props;
6855 	int b;
6856 	unsigned long quirks;
6857 
6858 	vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
6859 
6860 	mutex_init(&brightness_mutex);
6861 
6862 	quirks = tpacpi_check_quirks(brightness_quirk_table,
6863 				ARRAY_SIZE(brightness_quirk_table));
6864 
6865 	/* tpacpi_detect_brightness_capabilities() must have run already */
6866 
6867 	/* if it is unknown, we don't handle it: it wouldn't be safe */
6868 	if (tp_features.bright_unkfw)
6869 		return -ENODEV;
6870 
6871 	if (!brightness_enable) {
6872 		dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6873 			   "brightness support disabled by module parameter\n");
6874 		return -ENODEV;
6875 	}
6876 
6877 	if (acpi_video_get_backlight_type() != acpi_backlight_vendor) {
6878 		if (brightness_enable > 1) {
6879 			pr_info("Standard ACPI backlight interface available, not loading native one\n");
6880 			return -ENODEV;
6881 		} else if (brightness_enable == 1) {
6882 			pr_warn("Cannot enable backlight brightness support, ACPI is already handling it.  Refer to the acpi_backlight kernel parameter.\n");
6883 			return -ENODEV;
6884 		}
6885 	} else if (!tp_features.bright_acpimode) {
6886 		pr_notice("ACPI backlight interface not available\n");
6887 		return -ENODEV;
6888 	}
6889 
6890 	pr_notice("ACPI native brightness control enabled\n");
6891 
6892 	/*
6893 	 * Check for module parameter bogosity, note that we
6894 	 * init brightness_mode to TPACPI_BRGHT_MODE_MAX in order to be
6895 	 * able to detect "unspecified"
6896 	 */
6897 	if (brightness_mode > TPACPI_BRGHT_MODE_MAX)
6898 		return -EINVAL;
6899 
6900 	/* TPACPI_BRGHT_MODE_AUTO not implemented yet, just use default */
6901 	if (brightness_mode == TPACPI_BRGHT_MODE_AUTO ||
6902 	    brightness_mode == TPACPI_BRGHT_MODE_MAX) {
6903 		if (quirks & TPACPI_BRGHT_Q_EC)
6904 			brightness_mode = TPACPI_BRGHT_MODE_ECNVRAM;
6905 		else
6906 			brightness_mode = TPACPI_BRGHT_MODE_UCMS_STEP;
6907 
6908 		dbg_printk(TPACPI_DBG_BRGHT,
6909 			   "driver auto-selected brightness_mode=%d\n",
6910 			   brightness_mode);
6911 	}
6912 
6913 	/* Safety */
6914 	if (!tpacpi_is_ibm() &&
6915 	    (brightness_mode == TPACPI_BRGHT_MODE_ECNVRAM ||
6916 	     brightness_mode == TPACPI_BRGHT_MODE_EC))
6917 		return -EINVAL;
6918 
6919 	if (tpacpi_brightness_get_raw(&b) < 0)
6920 		return -ENODEV;
6921 
6922 	memset(&props, 0, sizeof(struct backlight_properties));
6923 	props.type = BACKLIGHT_PLATFORM;
6924 	props.max_brightness = bright_maxlvl;
6925 	props.brightness = b & TP_EC_BACKLIGHT_LVLMSK;
6926 	ibm_backlight_device = backlight_device_register(TPACPI_BACKLIGHT_DEV_NAME,
6927 							 NULL, NULL,
6928 							 &ibm_backlight_data,
6929 							 &props);
6930 	if (IS_ERR(ibm_backlight_device)) {
6931 		int rc = PTR_ERR(ibm_backlight_device);
6932 		ibm_backlight_device = NULL;
6933 		pr_err("Could not register backlight device\n");
6934 		return rc;
6935 	}
6936 	vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6937 			"brightness is supported\n");
6938 
6939 	if (quirks & TPACPI_BRGHT_Q_ASK) {
6940 		pr_notice("brightness: will use unverified default: brightness_mode=%d\n",
6941 			  brightness_mode);
6942 		pr_notice("brightness: please report to %s whether it works well or not on your ThinkPad\n",
6943 			  TPACPI_MAIL);
6944 	}
6945 
6946 	/* Added by mistake in early 2007.  Probably useless, but it could
6947 	 * be working around some unknown firmware problem where the value
6948 	 * read at startup doesn't match the real hardware state... so leave
6949 	 * it in place just in case */
6950 	backlight_update_status(ibm_backlight_device);
6951 
6952 	vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6953 		    "brightness: registering brightness hotkeys as change notification\n");
6954 	tpacpi_hotkey_driver_mask_set(hotkey_driver_mask
6955 				| TP_ACPI_HKEY_BRGHTUP_MASK
6956 				| TP_ACPI_HKEY_BRGHTDWN_MASK);
6957 	return 0;
6958 }
6959 
6960 static void brightness_suspend(void)
6961 {
6962 	tpacpi_brightness_checkpoint_nvram();
6963 }
6964 
6965 static void brightness_shutdown(void)
6966 {
6967 	tpacpi_brightness_checkpoint_nvram();
6968 }
6969 
6970 static void brightness_exit(void)
6971 {
6972 	if (ibm_backlight_device) {
6973 		vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_BRGHT,
6974 			    "calling backlight_device_unregister()\n");
6975 		backlight_device_unregister(ibm_backlight_device);
6976 	}
6977 
6978 	tpacpi_brightness_checkpoint_nvram();
6979 }
6980 
6981 static int brightness_read(struct seq_file *m)
6982 {
6983 	int level;
6984 
6985 	level = brightness_get(NULL);
6986 	if (level < 0) {
6987 		seq_printf(m, "level:\t\tunreadable\n");
6988 	} else {
6989 		seq_printf(m, "level:\t\t%d\n", level);
6990 		seq_printf(m, "commands:\tup, down\n");
6991 		seq_printf(m, "commands:\tlevel <level> (<level> is 0-%d)\n",
6992 			       bright_maxlvl);
6993 	}
6994 
6995 	return 0;
6996 }
6997 
6998 static int brightness_write(char *buf)
6999 {
7000 	int level;
7001 	int rc;
7002 	char *cmd;
7003 
7004 	level = brightness_get(NULL);
7005 	if (level < 0)
7006 		return level;
7007 
7008 	while ((cmd = strsep(&buf, ","))) {
7009 		if (strstarts(cmd, "up")) {
7010 			if (level < bright_maxlvl)
7011 				level++;
7012 		} else if (strstarts(cmd, "down")) {
7013 			if (level > 0)
7014 				level--;
7015 		} else if (sscanf(cmd, "level %d", &level) == 1 &&
7016 			   level >= 0 && level <= bright_maxlvl) {
7017 			/* new level set */
7018 		} else
7019 			return -EINVAL;
7020 	}
7021 
7022 	tpacpi_disclose_usertask("procfs brightness",
7023 			"set level to %d\n", level);
7024 
7025 	/*
7026 	 * Now we know what the final level should be, so we try to set it.
7027 	 * Doing it this way makes the syscall restartable in case of EINTR
7028 	 */
7029 	rc = brightness_set(level);
7030 	if (!rc && ibm_backlight_device)
7031 		backlight_force_update(ibm_backlight_device,
7032 					BACKLIGHT_UPDATE_SYSFS);
7033 	return (rc == -EINTR) ? -ERESTARTSYS : rc;
7034 }
7035 
7036 static struct ibm_struct brightness_driver_data = {
7037 	.name = "brightness",
7038 	.read = brightness_read,
7039 	.write = brightness_write,
7040 	.exit = brightness_exit,
7041 	.suspend = brightness_suspend,
7042 	.shutdown = brightness_shutdown,
7043 };
7044 
7045 /*************************************************************************
7046  * Volume subdriver
7047  */
7048 
7049 /*
7050  * IBM ThinkPads have a simple volume controller with MUTE gating.
7051  * Very early Lenovo ThinkPads follow the IBM ThinkPad spec.
7052  *
7053  * Since the *61 series (and probably also the later *60 series), Lenovo
7054  * ThinkPads only implement the MUTE gate.
7055  *
7056  * EC register 0x30
7057  *   Bit 6: MUTE (1 mutes sound)
7058  *   Bit 3-0: Volume
7059  *   Other bits should be zero as far as we know.
7060  *
7061  * This is also stored in CMOS NVRAM, byte 0x60, bit 6 (MUTE), and
7062  * bits 3-0 (volume).  Other bits in NVRAM may have other functions,
7063  * such as bit 7 which is used to detect repeated presses of MUTE,
7064  * and we leave them unchanged.
7065  *
7066  * On newer Lenovo ThinkPads, the EC can automatically change the volume
7067  * in response to user input.  Unfortunately, this rarely works well.
7068  * The laptop changes the state of its internal MUTE gate and, on some
7069  * models, sends KEY_MUTE, causing any user code that responds to the
7070  * mute button to get confused.  The hardware MUTE gate is also
7071  * unnecessary, since user code can handle the mute button without
7072  * kernel or EC help.
7073  *
7074  * To avoid confusing userspace, we simply disable all EC-based mute
7075  * and volume controls when possible.
7076  */
7077 
7078 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT
7079 
7080 #define TPACPI_ALSA_DRVNAME  "ThinkPad EC"
7081 #define TPACPI_ALSA_SHRTNAME "ThinkPad Console Audio Control"
7082 #define TPACPI_ALSA_MIXERNAME TPACPI_ALSA_SHRTNAME
7083 
7084 #if SNDRV_CARDS <= 32
7085 #define DEFAULT_ALSA_IDX		~((1 << (SNDRV_CARDS - 3)) - 1)
7086 #else
7087 #define DEFAULT_ALSA_IDX		~((1 << (32 - 3)) - 1)
7088 #endif
7089 static int alsa_index = DEFAULT_ALSA_IDX; /* last three slots */
7090 static char *alsa_id = "ThinkPadEC";
7091 static bool alsa_enable = SNDRV_DEFAULT_ENABLE1;
7092 
7093 struct tpacpi_alsa_data {
7094 	struct snd_card *card;
7095 	struct snd_ctl_elem_id *ctl_mute_id;
7096 	struct snd_ctl_elem_id *ctl_vol_id;
7097 };
7098 
7099 static struct snd_card *alsa_card;
7100 
7101 enum {
7102 	TP_EC_AUDIO = 0x30,
7103 
7104 	/* TP_EC_AUDIO bits */
7105 	TP_EC_AUDIO_MUTESW = 6,
7106 
7107 	/* TP_EC_AUDIO bitmasks */
7108 	TP_EC_AUDIO_LVL_MSK = 0x0F,
7109 	TP_EC_AUDIO_MUTESW_MSK = (1 << TP_EC_AUDIO_MUTESW),
7110 
7111 	/* Maximum volume */
7112 	TP_EC_VOLUME_MAX = 14,
7113 };
7114 
7115 enum tpacpi_volume_access_mode {
7116 	TPACPI_VOL_MODE_AUTO = 0,	/* Not implemented yet */
7117 	TPACPI_VOL_MODE_EC,		/* Pure EC control */
7118 	TPACPI_VOL_MODE_UCMS_STEP,	/* UCMS step-based control: N/A */
7119 	TPACPI_VOL_MODE_ECNVRAM,	/* EC control w/ NVRAM store */
7120 	TPACPI_VOL_MODE_MAX
7121 };
7122 
7123 enum tpacpi_volume_capabilities {
7124 	TPACPI_VOL_CAP_AUTO = 0,	/* Use white/blacklist */
7125 	TPACPI_VOL_CAP_VOLMUTE,		/* Output vol and mute */
7126 	TPACPI_VOL_CAP_MUTEONLY,	/* Output mute only */
7127 	TPACPI_VOL_CAP_MAX
7128 };
7129 
7130 enum tpacpi_mute_btn_mode {
7131 	TP_EC_MUTE_BTN_LATCH  = 0,	/* Mute mutes; up/down unmutes */
7132 	/* We don't know what mode 1 is. */
7133 	TP_EC_MUTE_BTN_NONE   = 2,	/* Mute and up/down are just keys */
7134 	TP_EC_MUTE_BTN_TOGGLE = 3,	/* Mute toggles; up/down unmutes */
7135 };
7136 
7137 static enum tpacpi_volume_access_mode volume_mode =
7138 	TPACPI_VOL_MODE_MAX;
7139 
7140 static enum tpacpi_volume_capabilities volume_capabilities;
7141 static bool volume_control_allowed;
7142 static bool software_mute_requested = true;
7143 static bool software_mute_active;
7144 static int software_mute_orig_mode;
7145 
7146 /*
7147  * Used to syncronize writers to TP_EC_AUDIO and
7148  * TP_NVRAM_ADDR_MIXER, as we need to do read-modify-write
7149  */
7150 static struct mutex volume_mutex;
7151 
7152 static void tpacpi_volume_checkpoint_nvram(void)
7153 {
7154 	u8 lec = 0;
7155 	u8 b_nvram;
7156 	u8 ec_mask;
7157 
7158 	if (volume_mode != TPACPI_VOL_MODE_ECNVRAM)
7159 		return;
7160 	if (!volume_control_allowed)
7161 		return;
7162 	if (software_mute_active)
7163 		return;
7164 
7165 	vdbg_printk(TPACPI_DBG_MIXER,
7166 		"trying to checkpoint mixer state to NVRAM...\n");
7167 
7168 	if (tp_features.mixer_no_level_control)
7169 		ec_mask = TP_EC_AUDIO_MUTESW_MSK;
7170 	else
7171 		ec_mask = TP_EC_AUDIO_MUTESW_MSK | TP_EC_AUDIO_LVL_MSK;
7172 
7173 	if (mutex_lock_killable(&volume_mutex) < 0)
7174 		return;
7175 
7176 	if (unlikely(!acpi_ec_read(TP_EC_AUDIO, &lec)))
7177 		goto unlock;
7178 	lec &= ec_mask;
7179 	b_nvram = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
7180 
7181 	if (lec != (b_nvram & ec_mask)) {
7182 		/* NVRAM needs update */
7183 		b_nvram &= ~ec_mask;
7184 		b_nvram |= lec;
7185 		nvram_write_byte(b_nvram, TP_NVRAM_ADDR_MIXER);
7186 		dbg_printk(TPACPI_DBG_MIXER,
7187 			   "updated NVRAM mixer status to 0x%02x (0x%02x)\n",
7188 			   (unsigned int) lec, (unsigned int) b_nvram);
7189 	} else {
7190 		vdbg_printk(TPACPI_DBG_MIXER,
7191 			   "NVRAM mixer status already is 0x%02x (0x%02x)\n",
7192 			   (unsigned int) lec, (unsigned int) b_nvram);
7193 	}
7194 
7195 unlock:
7196 	mutex_unlock(&volume_mutex);
7197 }
7198 
7199 static int volume_get_status_ec(u8 *status)
7200 {
7201 	u8 s;
7202 
7203 	if (!acpi_ec_read(TP_EC_AUDIO, &s))
7204 		return -EIO;
7205 
7206 	*status = s;
7207 
7208 	dbg_printk(TPACPI_DBG_MIXER, "status 0x%02x\n", s);
7209 
7210 	return 0;
7211 }
7212 
7213 static int volume_get_status(u8 *status)
7214 {
7215 	return volume_get_status_ec(status);
7216 }
7217 
7218 static int volume_set_status_ec(const u8 status)
7219 {
7220 	if (!acpi_ec_write(TP_EC_AUDIO, status))
7221 		return -EIO;
7222 
7223 	dbg_printk(TPACPI_DBG_MIXER, "set EC mixer to 0x%02x\n", status);
7224 
7225 	/*
7226 	 * On X200s, and possibly on others, it can take a while for
7227 	 * reads to become correct.
7228 	 */
7229 	msleep(1);
7230 
7231 	return 0;
7232 }
7233 
7234 static int volume_set_status(const u8 status)
7235 {
7236 	return volume_set_status_ec(status);
7237 }
7238 
7239 /* returns < 0 on error, 0 on no change, 1 on change */
7240 static int __volume_set_mute_ec(const bool mute)
7241 {
7242 	int rc;
7243 	u8 s, n;
7244 
7245 	if (mutex_lock_killable(&volume_mutex) < 0)
7246 		return -EINTR;
7247 
7248 	rc = volume_get_status_ec(&s);
7249 	if (rc)
7250 		goto unlock;
7251 
7252 	n = (mute) ? s | TP_EC_AUDIO_MUTESW_MSK :
7253 		     s & ~TP_EC_AUDIO_MUTESW_MSK;
7254 
7255 	if (n != s) {
7256 		rc = volume_set_status_ec(n);
7257 		if (!rc)
7258 			rc = 1;
7259 	}
7260 
7261 unlock:
7262 	mutex_unlock(&volume_mutex);
7263 	return rc;
7264 }
7265 
7266 static int volume_alsa_set_mute(const bool mute)
7267 {
7268 	dbg_printk(TPACPI_DBG_MIXER, "ALSA: trying to %smute\n",
7269 		   (mute) ? "" : "un");
7270 	return __volume_set_mute_ec(mute);
7271 }
7272 
7273 static int volume_set_mute(const bool mute)
7274 {
7275 	int rc;
7276 
7277 	dbg_printk(TPACPI_DBG_MIXER, "trying to %smute\n",
7278 		   (mute) ? "" : "un");
7279 
7280 	rc = __volume_set_mute_ec(mute);
7281 	return (rc < 0) ? rc : 0;
7282 }
7283 
7284 /* returns < 0 on error, 0 on no change, 1 on change */
7285 static int __volume_set_volume_ec(const u8 vol)
7286 {
7287 	int rc;
7288 	u8 s, n;
7289 
7290 	if (vol > TP_EC_VOLUME_MAX)
7291 		return -EINVAL;
7292 
7293 	if (mutex_lock_killable(&volume_mutex) < 0)
7294 		return -EINTR;
7295 
7296 	rc = volume_get_status_ec(&s);
7297 	if (rc)
7298 		goto unlock;
7299 
7300 	n = (s & ~TP_EC_AUDIO_LVL_MSK) | vol;
7301 
7302 	if (n != s) {
7303 		rc = volume_set_status_ec(n);
7304 		if (!rc)
7305 			rc = 1;
7306 	}
7307 
7308 unlock:
7309 	mutex_unlock(&volume_mutex);
7310 	return rc;
7311 }
7312 
7313 static int volume_set_software_mute(bool startup)
7314 {
7315 	int result;
7316 
7317 	if (!tpacpi_is_lenovo())
7318 		return -ENODEV;
7319 
7320 	if (startup) {
7321 		if (!acpi_evalf(ec_handle, &software_mute_orig_mode,
7322 				"HAUM", "qd"))
7323 			return -EIO;
7324 
7325 		dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
7326 			    "Initial HAUM setting was %d\n",
7327 			    software_mute_orig_mode);
7328 	}
7329 
7330 	if (!acpi_evalf(ec_handle, &result, "SAUM", "qdd",
7331 			(int)TP_EC_MUTE_BTN_NONE))
7332 		return -EIO;
7333 
7334 	if (result != TP_EC_MUTE_BTN_NONE)
7335 		pr_warn("Unexpected SAUM result %d\n",
7336 			result);
7337 
7338 	/*
7339 	 * In software mute mode, the standard codec controls take
7340 	 * precendence, so we unmute the ThinkPad HW switch at
7341 	 * startup.  Just on case there are SAUM-capable ThinkPads
7342 	 * with level controls, set max HW volume as well.
7343 	 */
7344 	if (tp_features.mixer_no_level_control)
7345 		result = volume_set_mute(false);
7346 	else
7347 		result = volume_set_status(TP_EC_VOLUME_MAX);
7348 
7349 	if (result != 0)
7350 		pr_warn("Failed to unmute the HW mute switch\n");
7351 
7352 	return 0;
7353 }
7354 
7355 static void volume_exit_software_mute(void)
7356 {
7357 	int r;
7358 
7359 	if (!acpi_evalf(ec_handle, &r, "SAUM", "qdd", software_mute_orig_mode)
7360 	    || r != software_mute_orig_mode)
7361 		pr_warn("Failed to restore mute mode\n");
7362 }
7363 
7364 static int volume_alsa_set_volume(const u8 vol)
7365 {
7366 	dbg_printk(TPACPI_DBG_MIXER,
7367 		   "ALSA: trying to set volume level to %hu\n", vol);
7368 	return __volume_set_volume_ec(vol);
7369 }
7370 
7371 static void volume_alsa_notify_change(void)
7372 {
7373 	struct tpacpi_alsa_data *d;
7374 
7375 	if (alsa_card && alsa_card->private_data) {
7376 		d = alsa_card->private_data;
7377 		if (d->ctl_mute_id)
7378 			snd_ctl_notify(alsa_card,
7379 					SNDRV_CTL_EVENT_MASK_VALUE,
7380 					d->ctl_mute_id);
7381 		if (d->ctl_vol_id)
7382 			snd_ctl_notify(alsa_card,
7383 					SNDRV_CTL_EVENT_MASK_VALUE,
7384 					d->ctl_vol_id);
7385 	}
7386 }
7387 
7388 static int volume_alsa_vol_info(struct snd_kcontrol *kcontrol,
7389 				struct snd_ctl_elem_info *uinfo)
7390 {
7391 	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
7392 	uinfo->count = 1;
7393 	uinfo->value.integer.min = 0;
7394 	uinfo->value.integer.max = TP_EC_VOLUME_MAX;
7395 	return 0;
7396 }
7397 
7398 static int volume_alsa_vol_get(struct snd_kcontrol *kcontrol,
7399 				struct snd_ctl_elem_value *ucontrol)
7400 {
7401 	u8 s;
7402 	int rc;
7403 
7404 	rc = volume_get_status(&s);
7405 	if (rc < 0)
7406 		return rc;
7407 
7408 	ucontrol->value.integer.value[0] = s & TP_EC_AUDIO_LVL_MSK;
7409 	return 0;
7410 }
7411 
7412 static int volume_alsa_vol_put(struct snd_kcontrol *kcontrol,
7413 				struct snd_ctl_elem_value *ucontrol)
7414 {
7415 	tpacpi_disclose_usertask("ALSA", "set volume to %ld\n",
7416 				 ucontrol->value.integer.value[0]);
7417 	return volume_alsa_set_volume(ucontrol->value.integer.value[0]);
7418 }
7419 
7420 #define volume_alsa_mute_info snd_ctl_boolean_mono_info
7421 
7422 static int volume_alsa_mute_get(struct snd_kcontrol *kcontrol,
7423 				struct snd_ctl_elem_value *ucontrol)
7424 {
7425 	u8 s;
7426 	int rc;
7427 
7428 	rc = volume_get_status(&s);
7429 	if (rc < 0)
7430 		return rc;
7431 
7432 	ucontrol->value.integer.value[0] =
7433 				(s & TP_EC_AUDIO_MUTESW_MSK) ? 0 : 1;
7434 	return 0;
7435 }
7436 
7437 static int volume_alsa_mute_put(struct snd_kcontrol *kcontrol,
7438 				struct snd_ctl_elem_value *ucontrol)
7439 {
7440 	tpacpi_disclose_usertask("ALSA", "%smute\n",
7441 				 ucontrol->value.integer.value[0] ?
7442 					"un" : "");
7443 	return volume_alsa_set_mute(!ucontrol->value.integer.value[0]);
7444 }
7445 
7446 static struct snd_kcontrol_new volume_alsa_control_vol __initdata = {
7447 	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
7448 	.name = "Console Playback Volume",
7449 	.index = 0,
7450 	.access = SNDRV_CTL_ELEM_ACCESS_READ,
7451 	.info = volume_alsa_vol_info,
7452 	.get = volume_alsa_vol_get,
7453 };
7454 
7455 static struct snd_kcontrol_new volume_alsa_control_mute __initdata = {
7456 	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
7457 	.name = "Console Playback Switch",
7458 	.index = 0,
7459 	.access = SNDRV_CTL_ELEM_ACCESS_READ,
7460 	.info = volume_alsa_mute_info,
7461 	.get = volume_alsa_mute_get,
7462 };
7463 
7464 static void volume_suspend(void)
7465 {
7466 	tpacpi_volume_checkpoint_nvram();
7467 }
7468 
7469 static void volume_resume(void)
7470 {
7471 	if (software_mute_active) {
7472 		if (volume_set_software_mute(false) < 0)
7473 			pr_warn("Failed to restore software mute\n");
7474 	} else {
7475 		volume_alsa_notify_change();
7476 	}
7477 }
7478 
7479 static void volume_shutdown(void)
7480 {
7481 	tpacpi_volume_checkpoint_nvram();
7482 }
7483 
7484 static void volume_exit(void)
7485 {
7486 	if (alsa_card) {
7487 		snd_card_free(alsa_card);
7488 		alsa_card = NULL;
7489 	}
7490 
7491 	tpacpi_volume_checkpoint_nvram();
7492 
7493 	if (software_mute_active)
7494 		volume_exit_software_mute();
7495 }
7496 
7497 static int __init volume_create_alsa_mixer(void)
7498 {
7499 	struct snd_card *card;
7500 	struct tpacpi_alsa_data *data;
7501 	struct snd_kcontrol *ctl_vol;
7502 	struct snd_kcontrol *ctl_mute;
7503 	int rc;
7504 
7505 	rc = snd_card_new(&tpacpi_pdev->dev,
7506 			  alsa_index, alsa_id, THIS_MODULE,
7507 			  sizeof(struct tpacpi_alsa_data), &card);
7508 	if (rc < 0 || !card) {
7509 		pr_err("Failed to create ALSA card structures: %d\n", rc);
7510 		return -ENODEV;
7511 	}
7512 
7513 	BUG_ON(!card->private_data);
7514 	data = card->private_data;
7515 	data->card = card;
7516 
7517 	strscpy(card->driver, TPACPI_ALSA_DRVNAME,
7518 		sizeof(card->driver));
7519 	strscpy(card->shortname, TPACPI_ALSA_SHRTNAME,
7520 		sizeof(card->shortname));
7521 	snprintf(card->mixername, sizeof(card->mixername), "ThinkPad EC %s",
7522 		 (thinkpad_id.ec_version_str) ?
7523 			thinkpad_id.ec_version_str : "(unknown)");
7524 	snprintf(card->longname, sizeof(card->longname),
7525 		 "%s at EC reg 0x%02x, fw %s", card->shortname, TP_EC_AUDIO,
7526 		 (thinkpad_id.ec_version_str) ?
7527 			thinkpad_id.ec_version_str : "unknown");
7528 
7529 	if (volume_control_allowed) {
7530 		volume_alsa_control_vol.put = volume_alsa_vol_put;
7531 		volume_alsa_control_vol.access =
7532 				SNDRV_CTL_ELEM_ACCESS_READWRITE;
7533 
7534 		volume_alsa_control_mute.put = volume_alsa_mute_put;
7535 		volume_alsa_control_mute.access =
7536 				SNDRV_CTL_ELEM_ACCESS_READWRITE;
7537 	}
7538 
7539 	if (!tp_features.mixer_no_level_control) {
7540 		ctl_vol = snd_ctl_new1(&volume_alsa_control_vol, NULL);
7541 		rc = snd_ctl_add(card, ctl_vol);
7542 		if (rc < 0) {
7543 			pr_err("Failed to create ALSA volume control: %d\n",
7544 			       rc);
7545 			goto err_exit;
7546 		}
7547 		data->ctl_vol_id = &ctl_vol->id;
7548 	}
7549 
7550 	ctl_mute = snd_ctl_new1(&volume_alsa_control_mute, NULL);
7551 	rc = snd_ctl_add(card, ctl_mute);
7552 	if (rc < 0) {
7553 		pr_err("Failed to create ALSA mute control: %d\n", rc);
7554 		goto err_exit;
7555 	}
7556 	data->ctl_mute_id = &ctl_mute->id;
7557 
7558 	rc = snd_card_register(card);
7559 	if (rc < 0) {
7560 		pr_err("Failed to register ALSA card: %d\n", rc);
7561 		goto err_exit;
7562 	}
7563 
7564 	alsa_card = card;
7565 	return 0;
7566 
7567 err_exit:
7568 	snd_card_free(card);
7569 	return -ENODEV;
7570 }
7571 
7572 #define TPACPI_VOL_Q_MUTEONLY	0x0001	/* Mute-only control available */
7573 #define TPACPI_VOL_Q_LEVEL	0x0002  /* Volume control available */
7574 
7575 static const struct tpacpi_quirk volume_quirk_table[] __initconst = {
7576 	/* Whitelist volume level on all IBM by default */
7577 	{ .vendor = PCI_VENDOR_ID_IBM,
7578 	  .bios   = TPACPI_MATCH_ANY,
7579 	  .ec     = TPACPI_MATCH_ANY,
7580 	  .quirks = TPACPI_VOL_Q_LEVEL },
7581 
7582 	/* Lenovo models with volume control (needs confirmation) */
7583 	TPACPI_QEC_LNV('7', 'C', TPACPI_VOL_Q_LEVEL), /* R60/i */
7584 	TPACPI_QEC_LNV('7', 'E', TPACPI_VOL_Q_LEVEL), /* R60e/i */
7585 	TPACPI_QEC_LNV('7', '9', TPACPI_VOL_Q_LEVEL), /* T60/p */
7586 	TPACPI_QEC_LNV('7', 'B', TPACPI_VOL_Q_LEVEL), /* X60/s */
7587 	TPACPI_QEC_LNV('7', 'J', TPACPI_VOL_Q_LEVEL), /* X60t */
7588 	TPACPI_QEC_LNV('7', '7', TPACPI_VOL_Q_LEVEL), /* Z60 */
7589 	TPACPI_QEC_LNV('7', 'F', TPACPI_VOL_Q_LEVEL), /* Z61 */
7590 
7591 	/* Whitelist mute-only on all Lenovo by default */
7592 	{ .vendor = PCI_VENDOR_ID_LENOVO,
7593 	  .bios   = TPACPI_MATCH_ANY,
7594 	  .ec	  = TPACPI_MATCH_ANY,
7595 	  .quirks = TPACPI_VOL_Q_MUTEONLY }
7596 };
7597 
7598 static int __init volume_init(struct ibm_init_struct *iibm)
7599 {
7600 	unsigned long quirks;
7601 	int rc;
7602 
7603 	vdbg_printk(TPACPI_DBG_INIT, "initializing volume subdriver\n");
7604 
7605 	mutex_init(&volume_mutex);
7606 
7607 	/*
7608 	 * Check for module parameter bogosity, note that we
7609 	 * init volume_mode to TPACPI_VOL_MODE_MAX in order to be
7610 	 * able to detect "unspecified"
7611 	 */
7612 	if (volume_mode > TPACPI_VOL_MODE_MAX)
7613 		return -EINVAL;
7614 
7615 	if (volume_mode == TPACPI_VOL_MODE_UCMS_STEP) {
7616 		pr_err("UCMS step volume mode not implemented, please contact %s\n",
7617 		       TPACPI_MAIL);
7618 		return -ENODEV;
7619 	}
7620 
7621 	if (volume_capabilities >= TPACPI_VOL_CAP_MAX)
7622 		return -EINVAL;
7623 
7624 	/*
7625 	 * The ALSA mixer is our primary interface.
7626 	 * When disabled, don't install the subdriver at all
7627 	 */
7628 	if (!alsa_enable) {
7629 		vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
7630 			    "ALSA mixer disabled by parameter, not loading volume subdriver...\n");
7631 		return -ENODEV;
7632 	}
7633 
7634 	quirks = tpacpi_check_quirks(volume_quirk_table,
7635 				     ARRAY_SIZE(volume_quirk_table));
7636 
7637 	switch (volume_capabilities) {
7638 	case TPACPI_VOL_CAP_AUTO:
7639 		if (quirks & TPACPI_VOL_Q_MUTEONLY)
7640 			tp_features.mixer_no_level_control = 1;
7641 		else if (quirks & TPACPI_VOL_Q_LEVEL)
7642 			tp_features.mixer_no_level_control = 0;
7643 		else
7644 			return -ENODEV; /* no mixer */
7645 		break;
7646 	case TPACPI_VOL_CAP_VOLMUTE:
7647 		tp_features.mixer_no_level_control = 0;
7648 		break;
7649 	case TPACPI_VOL_CAP_MUTEONLY:
7650 		tp_features.mixer_no_level_control = 1;
7651 		break;
7652 	default:
7653 		return -ENODEV;
7654 	}
7655 
7656 	if (volume_capabilities != TPACPI_VOL_CAP_AUTO)
7657 		dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
7658 				"using user-supplied volume_capabilities=%d\n",
7659 				volume_capabilities);
7660 
7661 	if (volume_mode == TPACPI_VOL_MODE_AUTO ||
7662 	    volume_mode == TPACPI_VOL_MODE_MAX) {
7663 		volume_mode = TPACPI_VOL_MODE_ECNVRAM;
7664 
7665 		dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
7666 				"driver auto-selected volume_mode=%d\n",
7667 				volume_mode);
7668 	} else {
7669 		dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
7670 				"using user-supplied volume_mode=%d\n",
7671 				volume_mode);
7672 	}
7673 
7674 	vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
7675 			"mute is supported, volume control is %s\n",
7676 			str_supported(!tp_features.mixer_no_level_control));
7677 
7678 	if (software_mute_requested && volume_set_software_mute(true) == 0) {
7679 		software_mute_active = true;
7680 	} else {
7681 		rc = volume_create_alsa_mixer();
7682 		if (rc) {
7683 			pr_err("Could not create the ALSA mixer interface\n");
7684 			return rc;
7685 		}
7686 
7687 		pr_info("Console audio control enabled, mode: %s\n",
7688 			(volume_control_allowed) ?
7689 				"override (read/write)" :
7690 				"monitor (read only)");
7691 	}
7692 
7693 	vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
7694 		"registering volume hotkeys as change notification\n");
7695 	tpacpi_hotkey_driver_mask_set(hotkey_driver_mask
7696 			| TP_ACPI_HKEY_VOLUP_MASK
7697 			| TP_ACPI_HKEY_VOLDWN_MASK
7698 			| TP_ACPI_HKEY_MUTE_MASK);
7699 
7700 	return 0;
7701 }
7702 
7703 static int volume_read(struct seq_file *m)
7704 {
7705 	u8 status;
7706 
7707 	if (volume_get_status(&status) < 0) {
7708 		seq_printf(m, "level:\t\tunreadable\n");
7709 	} else {
7710 		if (tp_features.mixer_no_level_control)
7711 			seq_printf(m, "level:\t\tunsupported\n");
7712 		else
7713 			seq_printf(m, "level:\t\t%d\n",
7714 					status & TP_EC_AUDIO_LVL_MSK);
7715 
7716 		seq_printf(m, "mute:\t\t%s\n", str_on_off(status & BIT(TP_EC_AUDIO_MUTESW)));
7717 
7718 		if (volume_control_allowed) {
7719 			seq_printf(m, "commands:\tunmute, mute\n");
7720 			if (!tp_features.mixer_no_level_control) {
7721 				seq_printf(m, "commands:\tup, down\n");
7722 				seq_printf(m, "commands:\tlevel <level> (<level> is 0-%d)\n",
7723 					      TP_EC_VOLUME_MAX);
7724 			}
7725 		}
7726 	}
7727 
7728 	return 0;
7729 }
7730 
7731 static int volume_write(char *buf)
7732 {
7733 	u8 s;
7734 	u8 new_level, new_mute;
7735 	int l;
7736 	char *cmd;
7737 	int rc;
7738 
7739 	/*
7740 	 * We do allow volume control at driver startup, so that the
7741 	 * user can set initial state through the volume=... parameter hack.
7742 	 */
7743 	if (!volume_control_allowed && tpacpi_lifecycle != TPACPI_LIFE_INIT) {
7744 		if (unlikely(!tp_warned.volume_ctrl_forbidden)) {
7745 			tp_warned.volume_ctrl_forbidden = 1;
7746 			pr_notice("Console audio control in monitor mode, changes are not allowed\n");
7747 			pr_notice("Use the volume_control=1 module parameter to enable volume control\n");
7748 		}
7749 		return -EPERM;
7750 	}
7751 
7752 	rc = volume_get_status(&s);
7753 	if (rc < 0)
7754 		return rc;
7755 
7756 	new_level = s & TP_EC_AUDIO_LVL_MSK;
7757 	new_mute  = s & TP_EC_AUDIO_MUTESW_MSK;
7758 
7759 	while ((cmd = strsep(&buf, ","))) {
7760 		if (!tp_features.mixer_no_level_control) {
7761 			if (strstarts(cmd, "up")) {
7762 				if (new_mute)
7763 					new_mute = 0;
7764 				else if (new_level < TP_EC_VOLUME_MAX)
7765 					new_level++;
7766 				continue;
7767 			} else if (strstarts(cmd, "down")) {
7768 				if (new_mute)
7769 					new_mute = 0;
7770 				else if (new_level > 0)
7771 					new_level--;
7772 				continue;
7773 			} else if (sscanf(cmd, "level %u", &l) == 1 &&
7774 				   l >= 0 && l <= TP_EC_VOLUME_MAX) {
7775 				new_level = l;
7776 				continue;
7777 			}
7778 		}
7779 		if (strstarts(cmd, "mute"))
7780 			new_mute = TP_EC_AUDIO_MUTESW_MSK;
7781 		else if (strstarts(cmd, "unmute"))
7782 			new_mute = 0;
7783 		else
7784 			return -EINVAL;
7785 	}
7786 
7787 	if (tp_features.mixer_no_level_control) {
7788 		tpacpi_disclose_usertask("procfs volume", "%smute\n",
7789 					new_mute ? "" : "un");
7790 		rc = volume_set_mute(!!new_mute);
7791 	} else {
7792 		tpacpi_disclose_usertask("procfs volume",
7793 					"%smute and set level to %d\n",
7794 					new_mute ? "" : "un", new_level);
7795 		rc = volume_set_status(new_mute | new_level);
7796 	}
7797 	volume_alsa_notify_change();
7798 
7799 	return (rc == -EINTR) ? -ERESTARTSYS : rc;
7800 }
7801 
7802 static struct ibm_struct volume_driver_data = {
7803 	.name = "volume",
7804 	.read = volume_read,
7805 	.write = volume_write,
7806 	.exit = volume_exit,
7807 	.suspend = volume_suspend,
7808 	.resume = volume_resume,
7809 	.shutdown = volume_shutdown,
7810 };
7811 
7812 #else /* !CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */
7813 
7814 #define alsa_card NULL
7815 
7816 static inline void volume_alsa_notify_change(void)
7817 {
7818 }
7819 
7820 static int __init volume_init(struct ibm_init_struct *iibm)
7821 {
7822 	pr_info("volume: disabled as there is no ALSA support in this kernel\n");
7823 
7824 	return -ENODEV;
7825 }
7826 
7827 static struct ibm_struct volume_driver_data = {
7828 	.name = "volume",
7829 };
7830 
7831 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */
7832 
7833 /*************************************************************************
7834  * Fan subdriver
7835  */
7836 
7837 /*
7838  * FAN ACCESS MODES
7839  *
7840  * TPACPI_FAN_RD_ACPI_GFAN:
7841  * 	ACPI GFAN method: returns fan level
7842  *
7843  * 	see TPACPI_FAN_WR_ACPI_SFAN
7844  * 	EC 0x2f (HFSP) not available if GFAN exists
7845  *
7846  * TPACPI_FAN_WR_ACPI_SFAN:
7847  * 	ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
7848  *
7849  * 	EC 0x2f (HFSP) might be available *for reading*, but do not use
7850  * 	it for writing.
7851  *
7852  * TPACPI_FAN_WR_TPEC:
7853  * 	ThinkPad EC register 0x2f (HFSP): fan control loop mode
7854  * 	Supported on almost all ThinkPads
7855  *
7856  * 	Fan speed changes of any sort (including those caused by the
7857  * 	disengaged mode) are usually done slowly by the firmware as the
7858  * 	maximum amount of fan duty cycle change per second seems to be
7859  * 	limited.
7860  *
7861  * 	Reading is not available if GFAN exists.
7862  * 	Writing is not available if SFAN exists.
7863  *
7864  * 	Bits
7865  *	 7	automatic mode engaged;
7866  *  		(default operation mode of the ThinkPad)
7867  * 		fan level is ignored in this mode.
7868  *	 6	full speed mode (takes precedence over bit 7);
7869  *		not available on all thinkpads.  May disable
7870  *		the tachometer while the fan controller ramps up
7871  *		the speed (which can take up to a few *minutes*).
7872  *		Speeds up fan to 100% duty-cycle, which is far above
7873  *		the standard RPM levels.  It is not impossible that
7874  *		it could cause hardware damage.
7875  *	5-3	unused in some models.  Extra bits for fan level
7876  *		in others, but still useless as all values above
7877  *		7 map to the same speed as level 7 in these models.
7878  *	2-0	fan level (0..7 usually)
7879  *			0x00 = stop
7880  * 			0x07 = max (set when temperatures critical)
7881  * 		Some ThinkPads may have other levels, see
7882  * 		TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
7883  *
7884  *	FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
7885  *	boot. Apparently the EC does not initialize it, so unless ACPI DSDT
7886  *	does so, its initial value is meaningless (0x07).
7887  *
7888  *	For firmware bugs, refer to:
7889  *	https://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
7890  *
7891  * 	----
7892  *
7893  *	ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
7894  *	Main fan tachometer reading (in RPM)
7895  *
7896  *	This register is present on all ThinkPads with a new-style EC, and
7897  *	it is known not to be present on the A21m/e, and T22, as there is
7898  *	something else in offset 0x84 according to the ACPI DSDT.  Other
7899  *	ThinkPads from this same time period (and earlier) probably lack the
7900  *	tachometer as well.
7901  *
7902  *	Unfortunately a lot of ThinkPads with new-style ECs but whose firmware
7903  *	was never fixed by IBM to report the EC firmware version string
7904  *	probably support the tachometer (like the early X models), so
7905  *	detecting it is quite hard.  We need more data to know for sure.
7906  *
7907  *	FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
7908  *	might result.
7909  *
7910  *	FIRMWARE BUG: may go stale while the EC is switching to full speed
7911  *	mode.
7912  *
7913  *	For firmware bugs, refer to:
7914  *	https://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
7915  *
7916  *	----
7917  *
7918  *	ThinkPad EC register 0x31 bit 0 (only on select models)
7919  *
7920  *	When bit 0 of EC register 0x31 is zero, the tachometer registers
7921  *	show the speed of the main fan.  When bit 0 of EC register 0x31
7922  *	is one, the tachometer registers show the speed of the auxiliary
7923  *	fan.
7924  *
7925  *	Fan control seems to affect both fans, regardless of the state
7926  *	of this bit.
7927  *
7928  *	So far, only the firmware for the X60/X61 non-tablet versions
7929  *	seem to support this (firmware TP-7M).
7930  *
7931  * TPACPI_FAN_WR_ACPI_FANS:
7932  *	ThinkPad X31, X40, X41.  Not available in the X60.
7933  *
7934  *	FANS ACPI handle: takes three arguments: low speed, medium speed,
7935  *	high speed.  ACPI DSDT seems to map these three speeds to levels
7936  *	as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
7937  *	(this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
7938  *
7939  * 	The speeds are stored on handles
7940  * 	(FANA:FAN9), (FANC:FANB), (FANE:FAND).
7941  *
7942  * 	There are three default speed sets, accessible as handles:
7943  * 	FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
7944  *
7945  * 	ACPI DSDT switches which set is in use depending on various
7946  * 	factors.
7947  *
7948  * 	TPACPI_FAN_WR_TPEC is also available and should be used to
7949  * 	command the fan.  The X31/X40/X41 seems to have 8 fan levels,
7950  * 	but the ACPI tables just mention level 7.
7951  *
7952  * TPACPI_FAN_RD_TPEC_NS:
7953  *	This mode is used for a few ThinkPads (L13 Yoga Gen2, X13 Yoga Gen2 etc.)
7954  *	that are using non-standard EC locations for reporting fan speeds.
7955  *	Currently these platforms only provide fan rpm reporting.
7956  *
7957  */
7958 
7959 #define FAN_RPM_CAL_CONST 491520	/* FAN RPM calculation offset for some non-standard ECFW */
7960 
7961 #define FAN_NS_CTRL_STATUS	BIT(2)		/* Bit which determines control is enabled or not */
7962 #define FAN_NS_CTRL		BIT(4)		/* Bit which determines control is by host or EC */
7963 
7964 enum {					/* Fan control constants */
7965 	fan_status_offset = 0x2f,	/* EC register 0x2f */
7966 	fan_rpm_offset = 0x84,		/* EC register 0x84: LSB, 0x85 MSB (RPM)
7967 					 * 0x84 must be read before 0x85 */
7968 	fan_select_offset = 0x31,	/* EC register 0x31 (Firmware 7M)
7969 					   bit 0 selects which fan is active */
7970 
7971 	fan_status_offset_ns = 0x93,	/* Special status/control offset for non-standard EC Fan1 */
7972 	fan2_status_offset_ns = 0x96,	/* Special status/control offset for non-standard EC Fan2 */
7973 	fan_rpm_status_ns = 0x95,	/* Special offset for Fan1 RPM status for non-standard EC */
7974 	fan2_rpm_status_ns = 0x98,	/* Special offset for Fan2 RPM status for non-standard EC */
7975 
7976 	TP_EC_FAN_FULLSPEED = 0x40,	/* EC fan mode: full speed */
7977 	TP_EC_FAN_AUTO	    = 0x80,	/* EC fan mode: auto fan control */
7978 
7979 	TPACPI_FAN_LAST_LEVEL = 0x100,	/* Use cached last-seen fan level */
7980 };
7981 
7982 enum fan_status_access_mode {
7983 	TPACPI_FAN_NONE = 0,		/* No fan status or control */
7984 	TPACPI_FAN_RD_ACPI_GFAN,	/* Use ACPI GFAN */
7985 	TPACPI_FAN_RD_TPEC,		/* Use ACPI EC regs 0x2f, 0x84-0x85 */
7986 	TPACPI_FAN_RD_TPEC_NS,		/* Use non-standard ACPI EC regs (eg: L13 Yoga gen2 etc.) */
7987 };
7988 
7989 enum fan_control_access_mode {
7990 	TPACPI_FAN_WR_NONE = 0,		/* No fan control */
7991 	TPACPI_FAN_WR_ACPI_SFAN,	/* Use ACPI SFAN */
7992 	TPACPI_FAN_WR_TPEC,		/* Use ACPI EC reg 0x2f */
7993 	TPACPI_FAN_WR_ACPI_FANS,	/* Use ACPI FANS and EC reg 0x2f */
7994 };
7995 
7996 enum fan_control_commands {
7997 	TPACPI_FAN_CMD_SPEED 	= 0x0001,	/* speed command */
7998 	TPACPI_FAN_CMD_LEVEL 	= 0x0002,	/* level command  */
7999 	TPACPI_FAN_CMD_ENABLE	= 0x0004,	/* enable/disable cmd,
8000 						 * and also watchdog cmd */
8001 };
8002 
8003 static bool fan_control_allowed;
8004 
8005 static enum fan_status_access_mode fan_status_access_mode;
8006 static enum fan_control_access_mode fan_control_access_mode;
8007 static enum fan_control_commands fan_control_commands;
8008 
8009 static u8 fan_control_initial_status;
8010 static u8 fan_control_desired_level;
8011 static u8 fan_control_resume_level;
8012 static int fan_watchdog_maxinterval;
8013 
8014 static bool fan_with_ns_addr;
8015 
8016 static struct mutex fan_mutex;
8017 
8018 static void fan_watchdog_fire(struct work_struct *ignored);
8019 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
8020 
8021 TPACPI_HANDLE(fans, ec, "FANS");	/* X31, X40, X41 */
8022 TPACPI_HANDLE(gfan, ec, "GFAN",	/* 570 */
8023 	   "\\FSPD",		/* 600e/x, 770e, 770x */
8024 	   );			/* all others */
8025 TPACPI_HANDLE(sfan, ec, "SFAN",	/* 570 */
8026 	   "JFNS",		/* 770x-JL */
8027 	   );			/* all others */
8028 
8029 /*
8030  * Unitialized HFSP quirk: ACPI DSDT and EC fail to initialize the
8031  * HFSP register at boot, so it contains 0x07 but the Thinkpad could
8032  * be in auto mode (0x80).
8033  *
8034  * This is corrected by any write to HFSP either by the driver, or
8035  * by the firmware.
8036  *
8037  * We assume 0x07 really means auto mode while this quirk is active,
8038  * as this is far more likely than the ThinkPad being in level 7,
8039  * which is only used by the firmware during thermal emergencies.
8040  *
8041  * Enable for TP-1Y (T43), TP-78 (R51e), TP-76 (R52),
8042  * TP-70 (T43, R52), which are known to be buggy.
8043  */
8044 
8045 static void fan_quirk1_setup(void)
8046 {
8047 	if (fan_control_initial_status == 0x07) {
8048 		pr_notice("fan_init: initial fan status is unknown, assuming it is in auto mode\n");
8049 		tp_features.fan_ctrl_status_undef = 1;
8050 	}
8051 }
8052 
8053 static void fan_quirk1_handle(u8 *fan_status)
8054 {
8055 	if (unlikely(tp_features.fan_ctrl_status_undef)) {
8056 		if (*fan_status != fan_control_initial_status) {
8057 			/* something changed the HFSP regisnter since
8058 			 * driver init time, so it is not undefined
8059 			 * anymore */
8060 			tp_features.fan_ctrl_status_undef = 0;
8061 		} else {
8062 			/* Return most likely status. In fact, it
8063 			 * might be the only possible status */
8064 			*fan_status = TP_EC_FAN_AUTO;
8065 		}
8066 	}
8067 }
8068 
8069 /* Select main fan on X60/X61, NOOP on others */
8070 static bool fan_select_fan1(void)
8071 {
8072 	if (tp_features.second_fan) {
8073 		u8 val;
8074 
8075 		if (ec_read(fan_select_offset, &val) < 0)
8076 			return false;
8077 		val &= 0xFEU;
8078 		if (ec_write(fan_select_offset, val) < 0)
8079 			return false;
8080 	}
8081 	return true;
8082 }
8083 
8084 /* Select secondary fan on X60/X61 */
8085 static bool fan_select_fan2(void)
8086 {
8087 	u8 val;
8088 
8089 	if (!tp_features.second_fan)
8090 		return false;
8091 
8092 	if (ec_read(fan_select_offset, &val) < 0)
8093 		return false;
8094 	val |= 0x01U;
8095 	if (ec_write(fan_select_offset, val) < 0)
8096 		return false;
8097 
8098 	return true;
8099 }
8100 
8101 static void fan_update_desired_level(u8 status)
8102 {
8103 	lockdep_assert_held(&fan_mutex);
8104 
8105 	if ((status &
8106 	     (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
8107 		if (status > 7)
8108 			fan_control_desired_level = 7;
8109 		else
8110 			fan_control_desired_level = status;
8111 	}
8112 }
8113 
8114 static int fan_get_status(u8 *status)
8115 {
8116 	u8 s;
8117 
8118 	/* TODO:
8119 	 * Add TPACPI_FAN_RD_ACPI_FANS ? */
8120 
8121 	switch (fan_status_access_mode) {
8122 	case TPACPI_FAN_RD_ACPI_GFAN: {
8123 		/* 570, 600e/x, 770e, 770x */
8124 		int res;
8125 
8126 		if (unlikely(!acpi_evalf(gfan_handle, &res, NULL, "d")))
8127 			return -EIO;
8128 
8129 		if (likely(status))
8130 			*status = res & 0x07;
8131 
8132 		break;
8133 	}
8134 	case TPACPI_FAN_RD_TPEC:
8135 		/* all except 570, 600e/x, 770e, 770x */
8136 		if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
8137 			return -EIO;
8138 
8139 		if (likely(status)) {
8140 			*status = s;
8141 			fan_quirk1_handle(status);
8142 		}
8143 
8144 		break;
8145 	case TPACPI_FAN_RD_TPEC_NS:
8146 		/* Default mode is AUTO which means controlled by EC */
8147 		if (!acpi_ec_read(fan_status_offset_ns, &s))
8148 			return -EIO;
8149 
8150 		if (status)
8151 			*status = s;
8152 
8153 		break;
8154 
8155 	default:
8156 		return -ENXIO;
8157 	}
8158 
8159 	return 0;
8160 }
8161 
8162 static int fan_get_status_safe(u8 *status)
8163 {
8164 	int rc;
8165 	u8 s;
8166 
8167 	if (mutex_lock_killable(&fan_mutex))
8168 		return -ERESTARTSYS;
8169 	rc = fan_get_status(&s);
8170 	/* NS EC doesn't have register with level settings */
8171 	if (!rc && !fan_with_ns_addr)
8172 		fan_update_desired_level(s);
8173 	mutex_unlock(&fan_mutex);
8174 
8175 	if (rc)
8176 		return rc;
8177 	if (status)
8178 		*status = s;
8179 
8180 	return 0;
8181 }
8182 
8183 static int fan_get_speed(unsigned int *speed)
8184 {
8185 	u8 hi, lo;
8186 
8187 	switch (fan_status_access_mode) {
8188 	case TPACPI_FAN_RD_TPEC:
8189 		/* all except 570, 600e/x, 770e, 770x */
8190 		if (unlikely(!fan_select_fan1()))
8191 			return -EIO;
8192 		if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
8193 			     !acpi_ec_read(fan_rpm_offset + 1, &hi)))
8194 			return -EIO;
8195 
8196 		if (likely(speed))
8197 			*speed = (hi << 8) | lo;
8198 		break;
8199 	case TPACPI_FAN_RD_TPEC_NS:
8200 		if (!acpi_ec_read(fan_rpm_status_ns, &lo))
8201 			return -EIO;
8202 
8203 		if (speed)
8204 			*speed = lo ? FAN_RPM_CAL_CONST / lo : 0;
8205 		break;
8206 
8207 	default:
8208 		return -ENXIO;
8209 	}
8210 
8211 	return 0;
8212 }
8213 
8214 static int fan2_get_speed(unsigned int *speed)
8215 {
8216 	u8 hi, lo, status;
8217 	bool rc;
8218 
8219 	switch (fan_status_access_mode) {
8220 	case TPACPI_FAN_RD_TPEC:
8221 		/* all except 570, 600e/x, 770e, 770x */
8222 		if (unlikely(!fan_select_fan2()))
8223 			return -EIO;
8224 		rc = !acpi_ec_read(fan_rpm_offset, &lo) ||
8225 			     !acpi_ec_read(fan_rpm_offset + 1, &hi);
8226 		fan_select_fan1(); /* play it safe */
8227 		if (rc)
8228 			return -EIO;
8229 
8230 		if (likely(speed))
8231 			*speed = (hi << 8) | lo;
8232 		break;
8233 
8234 	case TPACPI_FAN_RD_TPEC_NS:
8235 		rc = !acpi_ec_read(fan2_status_offset_ns, &status);
8236 		if (rc)
8237 			return -EIO;
8238 		if (!(status & FAN_NS_CTRL_STATUS)) {
8239 			pr_info("secondary fan control not supported\n");
8240 			return -EIO;
8241 		}
8242 		rc = !acpi_ec_read(fan2_rpm_status_ns, &lo);
8243 		if (rc)
8244 			return -EIO;
8245 		if (speed)
8246 			*speed = lo ? FAN_RPM_CAL_CONST / lo : 0;
8247 		break;
8248 
8249 	default:
8250 		return -ENXIO;
8251 	}
8252 
8253 	return 0;
8254 }
8255 
8256 static int fan_set_level(int level)
8257 {
8258 	if (!fan_control_allowed)
8259 		return -EPERM;
8260 
8261 	switch (fan_control_access_mode) {
8262 	case TPACPI_FAN_WR_ACPI_SFAN:
8263 		if ((level < 0) || (level > 7))
8264 			return -EINVAL;
8265 
8266 		if (tp_features.second_fan_ctl) {
8267 			if (!fan_select_fan2() ||
8268 			    !acpi_evalf(sfan_handle, NULL, NULL, "vd", level)) {
8269 				pr_warn("Couldn't set 2nd fan level, disabling support\n");
8270 				tp_features.second_fan_ctl = 0;
8271 			}
8272 			fan_select_fan1();
8273 		}
8274 		if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
8275 			return -EIO;
8276 		break;
8277 
8278 	case TPACPI_FAN_WR_ACPI_FANS:
8279 	case TPACPI_FAN_WR_TPEC:
8280 		if (!(level & TP_EC_FAN_AUTO) &&
8281 		    !(level & TP_EC_FAN_FULLSPEED) &&
8282 		    ((level < 0) || (level > 7)))
8283 			return -EINVAL;
8284 
8285 		/* safety net should the EC not support AUTO
8286 		 * or FULLSPEED mode bits and just ignore them */
8287 		if (level & TP_EC_FAN_FULLSPEED)
8288 			level |= 7;	/* safety min speed 7 */
8289 		else if (level & TP_EC_FAN_AUTO)
8290 			level |= 4;	/* safety min speed 4 */
8291 
8292 		if (tp_features.second_fan_ctl) {
8293 			if (!fan_select_fan2() ||
8294 			    !acpi_ec_write(fan_status_offset, level)) {
8295 				pr_warn("Couldn't set 2nd fan level, disabling support\n");
8296 				tp_features.second_fan_ctl = 0;
8297 			}
8298 			fan_select_fan1();
8299 
8300 		}
8301 		if (!acpi_ec_write(fan_status_offset, level))
8302 			return -EIO;
8303 		else
8304 			tp_features.fan_ctrl_status_undef = 0;
8305 		break;
8306 
8307 	default:
8308 		return -ENXIO;
8309 	}
8310 
8311 	vdbg_printk(TPACPI_DBG_FAN,
8312 		"fan control: set fan control register to 0x%02x\n", level);
8313 	return 0;
8314 }
8315 
8316 static int fan_set_level_safe(int level)
8317 {
8318 	int rc;
8319 
8320 	if (!fan_control_allowed)
8321 		return -EPERM;
8322 
8323 	if (mutex_lock_killable(&fan_mutex))
8324 		return -ERESTARTSYS;
8325 
8326 	if (level == TPACPI_FAN_LAST_LEVEL)
8327 		level = fan_control_desired_level;
8328 
8329 	rc = fan_set_level(level);
8330 	if (!rc)
8331 		fan_update_desired_level(level);
8332 
8333 	mutex_unlock(&fan_mutex);
8334 	return rc;
8335 }
8336 
8337 static int fan_set_enable(void)
8338 {
8339 	u8 s;
8340 	int rc;
8341 
8342 	if (!fan_control_allowed)
8343 		return -EPERM;
8344 
8345 	if (mutex_lock_killable(&fan_mutex))
8346 		return -ERESTARTSYS;
8347 
8348 	switch (fan_control_access_mode) {
8349 	case TPACPI_FAN_WR_ACPI_FANS:
8350 	case TPACPI_FAN_WR_TPEC:
8351 		rc = fan_get_status(&s);
8352 		if (rc)
8353 			break;
8354 
8355 		/* Don't go out of emergency fan mode */
8356 		if (s != 7) {
8357 			s &= 0x07;
8358 			s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
8359 		}
8360 
8361 		if (!acpi_ec_write(fan_status_offset, s))
8362 			rc = -EIO;
8363 		else {
8364 			tp_features.fan_ctrl_status_undef = 0;
8365 			rc = 0;
8366 		}
8367 		break;
8368 
8369 	case TPACPI_FAN_WR_ACPI_SFAN:
8370 		rc = fan_get_status(&s);
8371 		if (rc)
8372 			break;
8373 
8374 		s &= 0x07;
8375 
8376 		/* Set fan to at least level 4 */
8377 		s |= 4;
8378 
8379 		if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
8380 			rc = -EIO;
8381 		else
8382 			rc = 0;
8383 		break;
8384 
8385 	default:
8386 		rc = -ENXIO;
8387 	}
8388 
8389 	mutex_unlock(&fan_mutex);
8390 
8391 	if (!rc)
8392 		vdbg_printk(TPACPI_DBG_FAN,
8393 			"fan control: set fan control register to 0x%02x\n",
8394 			s);
8395 	return rc;
8396 }
8397 
8398 static int fan_set_disable(void)
8399 {
8400 	int rc;
8401 
8402 	if (!fan_control_allowed)
8403 		return -EPERM;
8404 
8405 	if (mutex_lock_killable(&fan_mutex))
8406 		return -ERESTARTSYS;
8407 
8408 	rc = 0;
8409 	switch (fan_control_access_mode) {
8410 	case TPACPI_FAN_WR_ACPI_FANS:
8411 	case TPACPI_FAN_WR_TPEC:
8412 		if (!acpi_ec_write(fan_status_offset, 0x00))
8413 			rc = -EIO;
8414 		else {
8415 			fan_control_desired_level = 0;
8416 			tp_features.fan_ctrl_status_undef = 0;
8417 		}
8418 		break;
8419 
8420 	case TPACPI_FAN_WR_ACPI_SFAN:
8421 		if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
8422 			rc = -EIO;
8423 		else
8424 			fan_control_desired_level = 0;
8425 		break;
8426 
8427 	default:
8428 		rc = -ENXIO;
8429 	}
8430 
8431 	if (!rc)
8432 		vdbg_printk(TPACPI_DBG_FAN,
8433 			"fan control: set fan control register to 0\n");
8434 
8435 	mutex_unlock(&fan_mutex);
8436 	return rc;
8437 }
8438 
8439 static int fan_set_speed(int speed)
8440 {
8441 	int rc;
8442 
8443 	if (!fan_control_allowed)
8444 		return -EPERM;
8445 
8446 	if (mutex_lock_killable(&fan_mutex))
8447 		return -ERESTARTSYS;
8448 
8449 	rc = 0;
8450 	switch (fan_control_access_mode) {
8451 	case TPACPI_FAN_WR_ACPI_FANS:
8452 		if (speed >= 0 && speed <= 65535) {
8453 			if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
8454 					speed, speed, speed))
8455 				rc = -EIO;
8456 		} else
8457 			rc = -EINVAL;
8458 		break;
8459 
8460 	default:
8461 		rc = -ENXIO;
8462 	}
8463 
8464 	mutex_unlock(&fan_mutex);
8465 	return rc;
8466 }
8467 
8468 static void fan_watchdog_reset(void)
8469 {
8470 	if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
8471 		return;
8472 
8473 	if (fan_watchdog_maxinterval > 0 &&
8474 	    tpacpi_lifecycle != TPACPI_LIFE_EXITING)
8475 		mod_delayed_work(tpacpi_wq, &fan_watchdog_task,
8476 			msecs_to_jiffies(fan_watchdog_maxinterval * 1000));
8477 	else
8478 		cancel_delayed_work(&fan_watchdog_task);
8479 }
8480 
8481 static void fan_watchdog_fire(struct work_struct *ignored)
8482 {
8483 	int rc;
8484 
8485 	if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
8486 		return;
8487 
8488 	pr_notice("fan watchdog: enabling fan\n");
8489 	rc = fan_set_enable();
8490 	if (rc < 0) {
8491 		pr_err("fan watchdog: error %d while enabling fan, will try again later...\n",
8492 		       rc);
8493 		/* reschedule for later */
8494 		fan_watchdog_reset();
8495 	}
8496 }
8497 
8498 /*
8499  * SYSFS fan layout: hwmon compatible (device)
8500  *
8501  * pwm*_enable:
8502  * 	0: "disengaged" mode
8503  * 	1: manual mode
8504  * 	2: native EC "auto" mode (recommended, hardware default)
8505  *
8506  * pwm*: set speed in manual mode, ignored otherwise.
8507  * 	0 is level 0; 255 is level 7. Intermediate points done with linear
8508  * 	interpolation.
8509  *
8510  * fan*_input: tachometer reading, RPM
8511  *
8512  *
8513  * SYSFS fan layout: extensions
8514  *
8515  * fan_watchdog (driver):
8516  * 	fan watchdog interval in seconds, 0 disables (default), max 120
8517  */
8518 
8519 /* sysfs fan pwm1_enable ----------------------------------------------- */
8520 static ssize_t fan_pwm1_enable_show(struct device *dev,
8521 				    struct device_attribute *attr,
8522 				    char *buf)
8523 {
8524 	int res, mode;
8525 	u8 status;
8526 
8527 	res = fan_get_status_safe(&status);
8528 	if (res)
8529 		return res;
8530 
8531 	if (status & TP_EC_FAN_FULLSPEED) {
8532 		mode = 0;
8533 	} else if (status & TP_EC_FAN_AUTO) {
8534 		mode = 2;
8535 	} else
8536 		mode = 1;
8537 
8538 	return sysfs_emit(buf, "%d\n", mode);
8539 }
8540 
8541 static ssize_t fan_pwm1_enable_store(struct device *dev,
8542 				     struct device_attribute *attr,
8543 				     const char *buf, size_t count)
8544 {
8545 	unsigned long t;
8546 	int res, level;
8547 
8548 	if (parse_strtoul(buf, 2, &t))
8549 		return -EINVAL;
8550 
8551 	tpacpi_disclose_usertask("hwmon pwm1_enable",
8552 			"set fan mode to %lu\n", t);
8553 
8554 	switch (t) {
8555 	case 0:
8556 		level = TP_EC_FAN_FULLSPEED;
8557 		break;
8558 	case 1:
8559 		level = TPACPI_FAN_LAST_LEVEL;
8560 		break;
8561 	case 2:
8562 		level = TP_EC_FAN_AUTO;
8563 		break;
8564 	case 3:
8565 		/* reserved for software-controlled auto mode */
8566 		return -ENOSYS;
8567 	default:
8568 		return -EINVAL;
8569 	}
8570 
8571 	res = fan_set_level_safe(level);
8572 	if (res == -ENXIO)
8573 		return -EINVAL;
8574 	else if (res < 0)
8575 		return res;
8576 
8577 	fan_watchdog_reset();
8578 
8579 	return count;
8580 }
8581 
8582 static DEVICE_ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
8583 		   fan_pwm1_enable_show, fan_pwm1_enable_store);
8584 
8585 /* sysfs fan pwm1 ------------------------------------------------------ */
8586 static ssize_t fan_pwm1_show(struct device *dev,
8587 			     struct device_attribute *attr,
8588 			     char *buf)
8589 {
8590 	int res;
8591 	u8 status;
8592 
8593 	res = fan_get_status_safe(&status);
8594 	if (res)
8595 		return res;
8596 
8597 	if ((status &
8598 	     (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
8599 		status = fan_control_desired_level;
8600 
8601 	if (status > 7)
8602 		status = 7;
8603 
8604 	return sysfs_emit(buf, "%u\n", (status * 255) / 7);
8605 }
8606 
8607 static ssize_t fan_pwm1_store(struct device *dev,
8608 			      struct device_attribute *attr,
8609 			      const char *buf, size_t count)
8610 {
8611 	unsigned long s;
8612 	int rc;
8613 	u8 status, newlevel;
8614 
8615 	if (parse_strtoul(buf, 255, &s))
8616 		return -EINVAL;
8617 
8618 	tpacpi_disclose_usertask("hwmon pwm1",
8619 			"set fan speed to %lu\n", s);
8620 
8621 	/* scale down from 0-255 to 0-7 */
8622 	newlevel = (s >> 5) & 0x07;
8623 
8624 	if (mutex_lock_killable(&fan_mutex))
8625 		return -ERESTARTSYS;
8626 
8627 	rc = fan_get_status(&status);
8628 	if (!rc && (status &
8629 		    (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
8630 		rc = fan_set_level(newlevel);
8631 		if (rc == -ENXIO)
8632 			rc = -EINVAL;
8633 		else if (!rc) {
8634 			fan_update_desired_level(newlevel);
8635 			fan_watchdog_reset();
8636 		}
8637 	}
8638 
8639 	mutex_unlock(&fan_mutex);
8640 	return (rc) ? rc : count;
8641 }
8642 
8643 static DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, fan_pwm1_show, fan_pwm1_store);
8644 
8645 /* sysfs fan fan1_input ------------------------------------------------ */
8646 static ssize_t fan_fan1_input_show(struct device *dev,
8647 			   struct device_attribute *attr,
8648 			   char *buf)
8649 {
8650 	int res;
8651 	unsigned int speed;
8652 
8653 	res = fan_get_speed(&speed);
8654 	if (res < 0)
8655 		return res;
8656 
8657 	return sysfs_emit(buf, "%u\n", speed);
8658 }
8659 
8660 static DEVICE_ATTR(fan1_input, S_IRUGO, fan_fan1_input_show, NULL);
8661 
8662 /* sysfs fan fan2_input ------------------------------------------------ */
8663 static ssize_t fan_fan2_input_show(struct device *dev,
8664 			   struct device_attribute *attr,
8665 			   char *buf)
8666 {
8667 	int res;
8668 	unsigned int speed;
8669 
8670 	res = fan2_get_speed(&speed);
8671 	if (res < 0)
8672 		return res;
8673 
8674 	return sysfs_emit(buf, "%u\n", speed);
8675 }
8676 
8677 static DEVICE_ATTR(fan2_input, S_IRUGO, fan_fan2_input_show, NULL);
8678 
8679 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */
8680 static ssize_t fan_watchdog_show(struct device_driver *drv, char *buf)
8681 {
8682 	return sysfs_emit(buf, "%u\n", fan_watchdog_maxinterval);
8683 }
8684 
8685 static ssize_t fan_watchdog_store(struct device_driver *drv, const char *buf,
8686 				  size_t count)
8687 {
8688 	unsigned long t;
8689 
8690 	if (parse_strtoul(buf, 120, &t))
8691 		return -EINVAL;
8692 
8693 	if (!fan_control_allowed)
8694 		return -EPERM;
8695 
8696 	fan_watchdog_maxinterval = t;
8697 	fan_watchdog_reset();
8698 
8699 	tpacpi_disclose_usertask("fan_watchdog", "set to %lu\n", t);
8700 
8701 	return count;
8702 }
8703 static DRIVER_ATTR_RW(fan_watchdog);
8704 
8705 /* --------------------------------------------------------------------- */
8706 
8707 static struct attribute *fan_attributes[] = {
8708 	&dev_attr_pwm1_enable.attr,
8709 	&dev_attr_pwm1.attr,
8710 	&dev_attr_fan1_input.attr,
8711 	&dev_attr_fan2_input.attr,
8712 	NULL
8713 };
8714 
8715 static umode_t fan_attr_is_visible(struct kobject *kobj, struct attribute *attr,
8716 				   int n)
8717 {
8718 	if (fan_status_access_mode == TPACPI_FAN_NONE &&
8719 	    fan_control_access_mode == TPACPI_FAN_WR_NONE)
8720 		return 0;
8721 
8722 	if (attr == &dev_attr_fan2_input.attr) {
8723 		if (!tp_features.second_fan)
8724 			return 0;
8725 	}
8726 
8727 	return attr->mode;
8728 }
8729 
8730 static const struct attribute_group fan_attr_group = {
8731 	.is_visible = fan_attr_is_visible,
8732 	.attrs = fan_attributes,
8733 };
8734 
8735 static struct attribute *fan_driver_attributes[] = {
8736 	&driver_attr_fan_watchdog.attr,
8737 	NULL
8738 };
8739 
8740 static const struct attribute_group fan_driver_attr_group = {
8741 	.is_visible = fan_attr_is_visible,
8742 	.attrs = fan_driver_attributes,
8743 };
8744 
8745 #define TPACPI_FAN_Q1		0x0001		/* Uninitialized HFSP */
8746 #define TPACPI_FAN_2FAN		0x0002		/* EC 0x31 bit 0 selects fan2 */
8747 #define TPACPI_FAN_2CTL		0x0004		/* selects fan2 control */
8748 #define TPACPI_FAN_NOFAN	0x0008		/* no fan available */
8749 #define TPACPI_FAN_NS		0x0010		/* For EC with non-Standard register addresses */
8750 
8751 static const struct tpacpi_quirk fan_quirk_table[] __initconst = {
8752 	TPACPI_QEC_IBM('1', 'Y', TPACPI_FAN_Q1),
8753 	TPACPI_QEC_IBM('7', '8', TPACPI_FAN_Q1),
8754 	TPACPI_QEC_IBM('7', '6', TPACPI_FAN_Q1),
8755 	TPACPI_QEC_IBM('7', '0', TPACPI_FAN_Q1),
8756 	TPACPI_QEC_LNV('7', 'M', TPACPI_FAN_2FAN),
8757 	TPACPI_Q_LNV('N', '1', TPACPI_FAN_2FAN),
8758 	TPACPI_Q_LNV3('N', '1', 'D', TPACPI_FAN_2CTL),	/* P70 */
8759 	TPACPI_Q_LNV3('N', '1', 'E', TPACPI_FAN_2CTL),	/* P50 */
8760 	TPACPI_Q_LNV3('N', '1', 'T', TPACPI_FAN_2CTL),	/* P71 */
8761 	TPACPI_Q_LNV3('N', '1', 'U', TPACPI_FAN_2CTL),	/* P51 */
8762 	TPACPI_Q_LNV3('N', '2', 'C', TPACPI_FAN_2CTL),	/* P52 / P72 */
8763 	TPACPI_Q_LNV3('N', '2', 'N', TPACPI_FAN_2CTL),	/* P53 / P73 */
8764 	TPACPI_Q_LNV3('N', '2', 'E', TPACPI_FAN_2CTL),	/* P1 / X1 Extreme (1st gen) */
8765 	TPACPI_Q_LNV3('N', '2', 'O', TPACPI_FAN_2CTL),	/* P1 / X1 Extreme (2nd gen) */
8766 	TPACPI_Q_LNV3('N', '3', '0', TPACPI_FAN_2CTL),	/* P15 (1st gen) / P15v (1st gen) */
8767 	TPACPI_Q_LNV3('N', '3', '7', TPACPI_FAN_2CTL),  /* T15g (2nd gen) */
8768 	TPACPI_Q_LNV3('R', '1', 'F', TPACPI_FAN_NS),	/* L13 Yoga Gen 2 */
8769 	TPACPI_Q_LNV3('N', '2', 'U', TPACPI_FAN_NS),	/* X13 Yoga Gen 2*/
8770 	TPACPI_Q_LNV3('N', '1', 'O', TPACPI_FAN_NOFAN),	/* X1 Tablet (2nd gen) */
8771 };
8772 
8773 static int __init fan_init(struct ibm_init_struct *iibm)
8774 {
8775 	unsigned long quirks;
8776 
8777 	vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
8778 			"initializing fan subdriver\n");
8779 
8780 	mutex_init(&fan_mutex);
8781 	fan_status_access_mode = TPACPI_FAN_NONE;
8782 	fan_control_access_mode = TPACPI_FAN_WR_NONE;
8783 	fan_control_commands = 0;
8784 	fan_watchdog_maxinterval = 0;
8785 	tp_features.fan_ctrl_status_undef = 0;
8786 	tp_features.second_fan = 0;
8787 	tp_features.second_fan_ctl = 0;
8788 	fan_control_desired_level = 7;
8789 
8790 	if (tpacpi_is_ibm()) {
8791 		TPACPI_ACPIHANDLE_INIT(fans);
8792 		TPACPI_ACPIHANDLE_INIT(gfan);
8793 		TPACPI_ACPIHANDLE_INIT(sfan);
8794 	}
8795 
8796 	quirks = tpacpi_check_quirks(fan_quirk_table,
8797 				     ARRAY_SIZE(fan_quirk_table));
8798 
8799 	if (quirks & TPACPI_FAN_NOFAN) {
8800 		pr_info("No integrated ThinkPad fan available\n");
8801 		return -ENODEV;
8802 	}
8803 
8804 	if (quirks & TPACPI_FAN_NS) {
8805 		pr_info("ECFW with non-standard fan reg control found\n");
8806 		fan_with_ns_addr = 1;
8807 		/* Fan ctrl support from host is undefined for now */
8808 		tp_features.fan_ctrl_status_undef = 1;
8809 	}
8810 
8811 	if (gfan_handle) {
8812 		/* 570, 600e/x, 770e, 770x */
8813 		fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
8814 	} else {
8815 		/* all other ThinkPads: note that even old-style
8816 		 * ThinkPad ECs supports the fan control register */
8817 		if (fan_with_ns_addr ||
8818 		    likely(acpi_ec_read(fan_status_offset, &fan_control_initial_status))) {
8819 			int res;
8820 			unsigned int speed;
8821 
8822 			fan_status_access_mode = fan_with_ns_addr ?
8823 				TPACPI_FAN_RD_TPEC_NS : TPACPI_FAN_RD_TPEC;
8824 
8825 			if (quirks & TPACPI_FAN_Q1)
8826 				fan_quirk1_setup();
8827 			/* Try and probe the 2nd fan */
8828 			tp_features.second_fan = 1; /* needed for get_speed to work */
8829 			res = fan2_get_speed(&speed);
8830 			if (res >= 0 && speed != FAN_NOT_PRESENT) {
8831 				/* It responded - so let's assume it's there */
8832 				tp_features.second_fan = 1;
8833 				/* fan control not currently available for ns ECFW */
8834 				tp_features.second_fan_ctl = !fan_with_ns_addr;
8835 				pr_info("secondary fan control detected & enabled\n");
8836 			} else {
8837 				/* Fan not auto-detected */
8838 				tp_features.second_fan = 0;
8839 				if (quirks & TPACPI_FAN_2FAN) {
8840 					tp_features.second_fan = 1;
8841 					pr_info("secondary fan support enabled\n");
8842 				}
8843 				if (quirks & TPACPI_FAN_2CTL) {
8844 					tp_features.second_fan = 1;
8845 					tp_features.second_fan_ctl = 1;
8846 					pr_info("secondary fan control enabled\n");
8847 				}
8848 			}
8849 		} else {
8850 			pr_err("ThinkPad ACPI EC access misbehaving, fan status and control unavailable\n");
8851 			return -ENODEV;
8852 		}
8853 	}
8854 
8855 	if (sfan_handle) {
8856 		/* 570, 770x-JL */
8857 		fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
8858 		fan_control_commands |=
8859 		    TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
8860 	} else {
8861 		if (!gfan_handle) {
8862 			/* gfan without sfan means no fan control */
8863 			/* all other models implement TP EC 0x2f control */
8864 
8865 			if (fans_handle) {
8866 				/* X31, X40, X41 */
8867 				fan_control_access_mode =
8868 				    TPACPI_FAN_WR_ACPI_FANS;
8869 				fan_control_commands |=
8870 				    TPACPI_FAN_CMD_SPEED |
8871 				    TPACPI_FAN_CMD_LEVEL |
8872 				    TPACPI_FAN_CMD_ENABLE;
8873 			} else {
8874 				fan_control_access_mode = TPACPI_FAN_WR_TPEC;
8875 				fan_control_commands |=
8876 				    TPACPI_FAN_CMD_LEVEL |
8877 				    TPACPI_FAN_CMD_ENABLE;
8878 			}
8879 		}
8880 	}
8881 
8882 	vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
8883 		"fan is %s, modes %d, %d\n",
8884 		str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
8885 		  fan_control_access_mode != TPACPI_FAN_WR_NONE),
8886 		fan_status_access_mode, fan_control_access_mode);
8887 
8888 	/* fan control master switch */
8889 	if (!fan_control_allowed) {
8890 		fan_control_access_mode = TPACPI_FAN_WR_NONE;
8891 		fan_control_commands = 0;
8892 		dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
8893 			   "fan control features disabled by parameter\n");
8894 	}
8895 
8896 	/* update fan_control_desired_level */
8897 	if (fan_status_access_mode != TPACPI_FAN_NONE)
8898 		fan_get_status_safe(NULL);
8899 
8900 	if (fan_status_access_mode == TPACPI_FAN_NONE &&
8901 	    fan_control_access_mode == TPACPI_FAN_WR_NONE)
8902 		return -ENODEV;
8903 
8904 	return 0;
8905 }
8906 
8907 static void fan_exit(void)
8908 {
8909 	vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_FAN,
8910 		    "cancelling any pending fan watchdog tasks\n");
8911 
8912 	cancel_delayed_work(&fan_watchdog_task);
8913 	flush_workqueue(tpacpi_wq);
8914 }
8915 
8916 static void fan_suspend(void)
8917 {
8918 	int rc;
8919 
8920 	if (!fan_control_allowed)
8921 		return;
8922 
8923 	/* Store fan status in cache */
8924 	fan_control_resume_level = 0;
8925 	rc = fan_get_status_safe(&fan_control_resume_level);
8926 	if (rc)
8927 		pr_notice("failed to read fan level for later restore during resume: %d\n",
8928 			  rc);
8929 
8930 	/* if it is undefined, don't attempt to restore it.
8931 	 * KEEP THIS LAST */
8932 	if (tp_features.fan_ctrl_status_undef)
8933 		fan_control_resume_level = 0;
8934 }
8935 
8936 static void fan_resume(void)
8937 {
8938 	u8 current_level = 7;
8939 	bool do_set = false;
8940 	int rc;
8941 
8942 	/* DSDT *always* updates status on resume */
8943 	tp_features.fan_ctrl_status_undef = 0;
8944 
8945 	if (!fan_control_allowed ||
8946 	    !fan_control_resume_level ||
8947 	    fan_get_status_safe(&current_level))
8948 		return;
8949 
8950 	switch (fan_control_access_mode) {
8951 	case TPACPI_FAN_WR_ACPI_SFAN:
8952 		/* never decrease fan level */
8953 		do_set = (fan_control_resume_level > current_level);
8954 		break;
8955 	case TPACPI_FAN_WR_ACPI_FANS:
8956 	case TPACPI_FAN_WR_TPEC:
8957 		/* never decrease fan level, scale is:
8958 		 * TP_EC_FAN_FULLSPEED > 7 >= TP_EC_FAN_AUTO
8959 		 *
8960 		 * We expect the firmware to set either 7 or AUTO, but we
8961 		 * handle FULLSPEED out of paranoia.
8962 		 *
8963 		 * So, we can safely only restore FULLSPEED or 7, anything
8964 		 * else could slow the fan.  Restoring AUTO is useless, at
8965 		 * best that's exactly what the DSDT already set (it is the
8966 		 * slower it uses).
8967 		 *
8968 		 * Always keep in mind that the DSDT *will* have set the
8969 		 * fans to what the vendor supposes is the best level.  We
8970 		 * muck with it only to speed the fan up.
8971 		 */
8972 		if (fan_control_resume_level != 7 &&
8973 		    !(fan_control_resume_level & TP_EC_FAN_FULLSPEED))
8974 			return;
8975 		else
8976 			do_set = !(current_level & TP_EC_FAN_FULLSPEED) &&
8977 				 (current_level != fan_control_resume_level);
8978 		break;
8979 	default:
8980 		return;
8981 	}
8982 	if (do_set) {
8983 		pr_notice("restoring fan level to 0x%02x\n",
8984 			  fan_control_resume_level);
8985 		rc = fan_set_level_safe(fan_control_resume_level);
8986 		if (rc < 0)
8987 			pr_notice("failed to restore fan level: %d\n", rc);
8988 	}
8989 }
8990 
8991 static int fan_read(struct seq_file *m)
8992 {
8993 	int rc;
8994 	u8 status;
8995 	unsigned int speed = 0;
8996 
8997 	switch (fan_status_access_mode) {
8998 	case TPACPI_FAN_RD_ACPI_GFAN:
8999 		/* 570, 600e/x, 770e, 770x */
9000 		rc = fan_get_status_safe(&status);
9001 		if (rc)
9002 			return rc;
9003 
9004 		seq_printf(m, "status:\t\t%s\n"
9005 			       "level:\t\t%d\n",
9006 			       str_enabled_disabled(status), status);
9007 		break;
9008 
9009 	case TPACPI_FAN_RD_TPEC_NS:
9010 	case TPACPI_FAN_RD_TPEC:
9011 		/* all except 570, 600e/x, 770e, 770x */
9012 		rc = fan_get_status_safe(&status);
9013 		if (rc)
9014 			return rc;
9015 
9016 		seq_printf(m, "status:\t\t%s\n", str_enabled_disabled(status));
9017 
9018 		rc = fan_get_speed(&speed);
9019 		if (rc < 0)
9020 			return rc;
9021 
9022 		seq_printf(m, "speed:\t\t%d\n", speed);
9023 
9024 		if (fan_status_access_mode == TPACPI_FAN_RD_TPEC_NS) {
9025 			/*
9026 			 * No full speed bit in NS EC
9027 			 * EC Auto mode is set by default.
9028 			 * No other levels settings available
9029 			 */
9030 			seq_printf(m, "level:\t\t%s\n", status & FAN_NS_CTRL ? "unknown" : "auto");
9031 		} else {
9032 			if (status & TP_EC_FAN_FULLSPEED)
9033 				/* Disengaged mode takes precedence */
9034 				seq_printf(m, "level:\t\tdisengaged\n");
9035 			else if (status & TP_EC_FAN_AUTO)
9036 				seq_printf(m, "level:\t\tauto\n");
9037 			else
9038 				seq_printf(m, "level:\t\t%d\n", status);
9039 		}
9040 		break;
9041 
9042 	case TPACPI_FAN_NONE:
9043 	default:
9044 		seq_printf(m, "status:\t\tnot supported\n");
9045 	}
9046 
9047 	if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
9048 		seq_printf(m, "commands:\tlevel <level>");
9049 
9050 		switch (fan_control_access_mode) {
9051 		case TPACPI_FAN_WR_ACPI_SFAN:
9052 			seq_printf(m, " (<level> is 0-7)\n");
9053 			break;
9054 
9055 		default:
9056 			seq_printf(m, " (<level> is 0-7, auto, disengaged, full-speed)\n");
9057 			break;
9058 		}
9059 	}
9060 
9061 	if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
9062 		seq_printf(m, "commands:\tenable, disable\n"
9063 			       "commands:\twatchdog <timeout> (<timeout> is 0 (off), 1-120 (seconds))\n");
9064 
9065 	if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
9066 		seq_printf(m, "commands:\tspeed <speed> (<speed> is 0-65535)\n");
9067 
9068 	return 0;
9069 }
9070 
9071 static int fan_write_cmd_level(const char *cmd, int *rc)
9072 {
9073 	int level;
9074 
9075 	if (strstarts(cmd, "level auto"))
9076 		level = TP_EC_FAN_AUTO;
9077 	else if (strstarts(cmd, "level disengaged") || strstarts(cmd, "level full-speed"))
9078 		level = TP_EC_FAN_FULLSPEED;
9079 	else if (sscanf(cmd, "level %d", &level) != 1)
9080 		return 0;
9081 
9082 	*rc = fan_set_level_safe(level);
9083 	if (*rc == -ENXIO)
9084 		pr_err("level command accepted for unsupported access mode %d\n",
9085 		       fan_control_access_mode);
9086 	else if (!*rc)
9087 		tpacpi_disclose_usertask("procfs fan",
9088 			"set level to %d\n", level);
9089 
9090 	return 1;
9091 }
9092 
9093 static int fan_write_cmd_enable(const char *cmd, int *rc)
9094 {
9095 	if (!strstarts(cmd, "enable"))
9096 		return 0;
9097 
9098 	*rc = fan_set_enable();
9099 	if (*rc == -ENXIO)
9100 		pr_err("enable command accepted for unsupported access mode %d\n",
9101 		       fan_control_access_mode);
9102 	else if (!*rc)
9103 		tpacpi_disclose_usertask("procfs fan", "enable\n");
9104 
9105 	return 1;
9106 }
9107 
9108 static int fan_write_cmd_disable(const char *cmd, int *rc)
9109 {
9110 	if (!strstarts(cmd, "disable"))
9111 		return 0;
9112 
9113 	*rc = fan_set_disable();
9114 	if (*rc == -ENXIO)
9115 		pr_err("disable command accepted for unsupported access mode %d\n",
9116 		       fan_control_access_mode);
9117 	else if (!*rc)
9118 		tpacpi_disclose_usertask("procfs fan", "disable\n");
9119 
9120 	return 1;
9121 }
9122 
9123 static int fan_write_cmd_speed(const char *cmd, int *rc)
9124 {
9125 	int speed;
9126 
9127 	/* TODO:
9128 	 * Support speed <low> <medium> <high> ? */
9129 
9130 	if (sscanf(cmd, "speed %d", &speed) != 1)
9131 		return 0;
9132 
9133 	*rc = fan_set_speed(speed);
9134 	if (*rc == -ENXIO)
9135 		pr_err("speed command accepted for unsupported access mode %d\n",
9136 		       fan_control_access_mode);
9137 	else if (!*rc)
9138 		tpacpi_disclose_usertask("procfs fan",
9139 			"set speed to %d\n", speed);
9140 
9141 	return 1;
9142 }
9143 
9144 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
9145 {
9146 	int interval;
9147 
9148 	if (sscanf(cmd, "watchdog %d", &interval) != 1)
9149 		return 0;
9150 
9151 	if (interval < 0 || interval > 120)
9152 		*rc = -EINVAL;
9153 	else {
9154 		fan_watchdog_maxinterval = interval;
9155 		tpacpi_disclose_usertask("procfs fan",
9156 			"set watchdog timer to %d\n",
9157 			interval);
9158 	}
9159 
9160 	return 1;
9161 }
9162 
9163 static int fan_write(char *buf)
9164 {
9165 	char *cmd;
9166 	int rc = 0;
9167 
9168 	while (!rc && (cmd = strsep(&buf, ","))) {
9169 		if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
9170 		      fan_write_cmd_level(cmd, &rc)) &&
9171 		    !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
9172 		      (fan_write_cmd_enable(cmd, &rc) ||
9173 		       fan_write_cmd_disable(cmd, &rc) ||
9174 		       fan_write_cmd_watchdog(cmd, &rc))) &&
9175 		    !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
9176 		      fan_write_cmd_speed(cmd, &rc))
9177 		    )
9178 			rc = -EINVAL;
9179 		else if (!rc)
9180 			fan_watchdog_reset();
9181 	}
9182 
9183 	return rc;
9184 }
9185 
9186 static struct ibm_struct fan_driver_data = {
9187 	.name = "fan",
9188 	.read = fan_read,
9189 	.write = fan_write,
9190 	.exit = fan_exit,
9191 	.suspend = fan_suspend,
9192 	.resume = fan_resume,
9193 };
9194 
9195 /*************************************************************************
9196  * Mute LED subdriver
9197  */
9198 
9199 #define TPACPI_LED_MAX		2
9200 
9201 struct tp_led_table {
9202 	acpi_string name;
9203 	int on_value;
9204 	int off_value;
9205 	int state;
9206 };
9207 
9208 static struct tp_led_table led_tables[TPACPI_LED_MAX] = {
9209 	[LED_AUDIO_MUTE] = {
9210 		.name = "SSMS",
9211 		.on_value = 1,
9212 		.off_value = 0,
9213 	},
9214 	[LED_AUDIO_MICMUTE] = {
9215 		.name = "MMTS",
9216 		.on_value = 2,
9217 		.off_value = 0,
9218 	},
9219 };
9220 
9221 static int mute_led_on_off(struct tp_led_table *t, bool state)
9222 {
9223 	acpi_handle temp;
9224 	int output;
9225 
9226 	if (ACPI_FAILURE(acpi_get_handle(hkey_handle, t->name, &temp))) {
9227 		pr_warn("Thinkpad ACPI has no %s interface.\n", t->name);
9228 		return -EIO;
9229 	}
9230 
9231 	if (!acpi_evalf(hkey_handle, &output, t->name, "dd",
9232 			state ? t->on_value : t->off_value))
9233 		return -EIO;
9234 
9235 	t->state = state;
9236 	return state;
9237 }
9238 
9239 static int tpacpi_led_set(int whichled, bool on)
9240 {
9241 	struct tp_led_table *t;
9242 
9243 	t = &led_tables[whichled];
9244 	if (t->state < 0 || t->state == on)
9245 		return t->state;
9246 	return mute_led_on_off(t, on);
9247 }
9248 
9249 static int tpacpi_led_mute_set(struct led_classdev *led_cdev,
9250 			       enum led_brightness brightness)
9251 {
9252 	return tpacpi_led_set(LED_AUDIO_MUTE, brightness != LED_OFF);
9253 }
9254 
9255 static int tpacpi_led_micmute_set(struct led_classdev *led_cdev,
9256 				  enum led_brightness brightness)
9257 {
9258 	return tpacpi_led_set(LED_AUDIO_MICMUTE, brightness != LED_OFF);
9259 }
9260 
9261 static struct led_classdev mute_led_cdev[TPACPI_LED_MAX] = {
9262 	[LED_AUDIO_MUTE] = {
9263 		.name		= "platform::mute",
9264 		.max_brightness = 1,
9265 		.brightness_set_blocking = tpacpi_led_mute_set,
9266 		.default_trigger = "audio-mute",
9267 	},
9268 	[LED_AUDIO_MICMUTE] = {
9269 		.name		= "platform::micmute",
9270 		.max_brightness = 1,
9271 		.brightness_set_blocking = tpacpi_led_micmute_set,
9272 		.default_trigger = "audio-micmute",
9273 	},
9274 };
9275 
9276 static int mute_led_init(struct ibm_init_struct *iibm)
9277 {
9278 	acpi_handle temp;
9279 	int i, err;
9280 
9281 	for (i = 0; i < TPACPI_LED_MAX; i++) {
9282 		struct tp_led_table *t = &led_tables[i];
9283 		if (ACPI_FAILURE(acpi_get_handle(hkey_handle, t->name, &temp))) {
9284 			t->state = -ENODEV;
9285 			continue;
9286 		}
9287 
9288 		mute_led_cdev[i].brightness = ledtrig_audio_get(i);
9289 		err = led_classdev_register(&tpacpi_pdev->dev, &mute_led_cdev[i]);
9290 		if (err < 0) {
9291 			while (i--)
9292 				led_classdev_unregister(&mute_led_cdev[i]);
9293 			return err;
9294 		}
9295 	}
9296 	return 0;
9297 }
9298 
9299 static void mute_led_exit(void)
9300 {
9301 	int i;
9302 
9303 	for (i = 0; i < TPACPI_LED_MAX; i++) {
9304 		led_classdev_unregister(&mute_led_cdev[i]);
9305 		tpacpi_led_set(i, false);
9306 	}
9307 }
9308 
9309 static void mute_led_resume(void)
9310 {
9311 	int i;
9312 
9313 	for (i = 0; i < TPACPI_LED_MAX; i++) {
9314 		struct tp_led_table *t = &led_tables[i];
9315 		if (t->state >= 0)
9316 			mute_led_on_off(t, t->state);
9317 	}
9318 }
9319 
9320 static struct ibm_struct mute_led_driver_data = {
9321 	.name = "mute_led",
9322 	.exit = mute_led_exit,
9323 	.resume = mute_led_resume,
9324 };
9325 
9326 /*
9327  * Battery Wear Control Driver
9328  * Contact: Ognjen Galic <smclt30p@gmail.com>
9329  */
9330 
9331 /* Metadata */
9332 
9333 #define GET_START	"BCTG"
9334 #define SET_START	"BCCS"
9335 #define GET_STOP	"BCSG"
9336 #define SET_STOP	"BCSS"
9337 #define GET_DISCHARGE	"BDSG"
9338 #define SET_DISCHARGE	"BDSS"
9339 #define GET_INHIBIT	"BICG"
9340 #define SET_INHIBIT	"BICS"
9341 
9342 enum {
9343 	BAT_ANY = 0,
9344 	BAT_PRIMARY = 1,
9345 	BAT_SECONDARY = 2
9346 };
9347 
9348 enum {
9349 	/* Error condition bit */
9350 	METHOD_ERR = BIT(31),
9351 };
9352 
9353 enum {
9354 	/* This is used in the get/set helpers */
9355 	THRESHOLD_START,
9356 	THRESHOLD_STOP,
9357 	FORCE_DISCHARGE,
9358 	INHIBIT_CHARGE,
9359 };
9360 
9361 struct tpacpi_battery_data {
9362 	int charge_start;
9363 	int start_support;
9364 	int charge_stop;
9365 	int stop_support;
9366 	unsigned int charge_behaviours;
9367 };
9368 
9369 struct tpacpi_battery_driver_data {
9370 	struct tpacpi_battery_data batteries[3];
9371 	int individual_addressing;
9372 };
9373 
9374 static struct tpacpi_battery_driver_data battery_info;
9375 
9376 /* ACPI helpers/functions/probes */
9377 
9378 /**
9379  * This evaluates a ACPI method call specific to the battery
9380  * ACPI extension. The specifics are that an error is marked
9381  * in the 32rd bit of the response, so we just check that here.
9382  */
9383 static acpi_status tpacpi_battery_acpi_eval(char *method, int *ret, int param)
9384 {
9385 	int response;
9386 
9387 	if (!acpi_evalf(hkey_handle, &response, method, "dd", param)) {
9388 		acpi_handle_err(hkey_handle, "%s: evaluate failed", method);
9389 		return AE_ERROR;
9390 	}
9391 	if (response & METHOD_ERR) {
9392 		acpi_handle_err(hkey_handle,
9393 				"%s evaluated but flagged as error", method);
9394 		return AE_ERROR;
9395 	}
9396 	*ret = response;
9397 	return AE_OK;
9398 }
9399 
9400 static int tpacpi_battery_get(int what, int battery, int *ret)
9401 {
9402 	switch (what) {
9403 	case THRESHOLD_START:
9404 		if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_START, ret, battery))
9405 			return -ENODEV;
9406 
9407 		/* The value is in the low 8 bits of the response */
9408 		*ret = *ret & 0xFF;
9409 		return 0;
9410 	case THRESHOLD_STOP:
9411 		if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_STOP, ret, battery))
9412 			return -ENODEV;
9413 		/* Value is in lower 8 bits */
9414 		*ret = *ret & 0xFF;
9415 		/*
9416 		 * On the stop value, if we return 0 that
9417 		 * does not make any sense. 0 means Default, which
9418 		 * means that charging stops at 100%, so we return
9419 		 * that.
9420 		 */
9421 		if (*ret == 0)
9422 			*ret = 100;
9423 		return 0;
9424 	case FORCE_DISCHARGE:
9425 		if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_DISCHARGE, ret, battery))
9426 			return -ENODEV;
9427 		/* The force discharge status is in bit 0 */
9428 		*ret = *ret & 0x01;
9429 		return 0;
9430 	case INHIBIT_CHARGE:
9431 		if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_INHIBIT, ret, battery))
9432 			return -ENODEV;
9433 		/* The inhibit charge status is in bit 0 */
9434 		*ret = *ret & 0x01;
9435 		return 0;
9436 	default:
9437 		pr_crit("wrong parameter: %d", what);
9438 		return -EINVAL;
9439 	}
9440 }
9441 
9442 static int tpacpi_battery_set(int what, int battery, int value)
9443 {
9444 	int param, ret;
9445 	/* The first 8 bits are the value of the threshold */
9446 	param = value;
9447 	/* The battery ID is in bits 8-9, 2 bits */
9448 	param |= battery << 8;
9449 
9450 	switch (what) {
9451 	case THRESHOLD_START:
9452 		if ACPI_FAILURE(tpacpi_battery_acpi_eval(SET_START, &ret, param)) {
9453 			pr_err("failed to set charge threshold on battery %d",
9454 					battery);
9455 			return -ENODEV;
9456 		}
9457 		return 0;
9458 	case THRESHOLD_STOP:
9459 		if ACPI_FAILURE(tpacpi_battery_acpi_eval(SET_STOP, &ret, param)) {
9460 			pr_err("failed to set stop threshold: %d", battery);
9461 			return -ENODEV;
9462 		}
9463 		return 0;
9464 	case FORCE_DISCHARGE:
9465 		/* Force discharge is in bit 0,
9466 		 * break on AC attach is in bit 1 (won't work on some ThinkPads),
9467 		 * battery ID is in bits 8-9, 2 bits.
9468 		 */
9469 		if (ACPI_FAILURE(tpacpi_battery_acpi_eval(SET_DISCHARGE, &ret, param))) {
9470 			pr_err("failed to set force discharge on %d", battery);
9471 			return -ENODEV;
9472 		}
9473 		return 0;
9474 	case INHIBIT_CHARGE:
9475 		/* When setting inhibit charge, we set a default value of
9476 		 * always breaking on AC detach and the effective time is set to
9477 		 * be permanent.
9478 		 * The battery ID is in bits 4-5, 2 bits,
9479 		 * the effective time is in bits 8-23, 2 bytes.
9480 		 * A time of FFFF indicates forever.
9481 		 */
9482 		param = value;
9483 		param |= battery << 4;
9484 		param |= 0xFFFF << 8;
9485 		if (ACPI_FAILURE(tpacpi_battery_acpi_eval(SET_INHIBIT, &ret, param))) {
9486 			pr_err("failed to set inhibit charge on %d", battery);
9487 			return -ENODEV;
9488 		}
9489 		return 0;
9490 	default:
9491 		pr_crit("wrong parameter: %d", what);
9492 		return -EINVAL;
9493 	}
9494 }
9495 
9496 static int tpacpi_battery_set_validate(int what, int battery, int value)
9497 {
9498 	int ret, v;
9499 
9500 	ret = tpacpi_battery_set(what, battery, value);
9501 	if (ret < 0)
9502 		return ret;
9503 
9504 	ret = tpacpi_battery_get(what, battery, &v);
9505 	if (ret < 0)
9506 		return ret;
9507 
9508 	if (v == value)
9509 		return 0;
9510 
9511 	msleep(500);
9512 
9513 	ret = tpacpi_battery_get(what, battery, &v);
9514 	if (ret < 0)
9515 		return ret;
9516 
9517 	if (v == value)
9518 		return 0;
9519 
9520 	return -EIO;
9521 }
9522 
9523 static int tpacpi_battery_probe(int battery)
9524 {
9525 	int ret = 0;
9526 
9527 	memset(&battery_info.batteries[battery], 0,
9528 		sizeof(battery_info.batteries[battery]));
9529 
9530 	/*
9531 	 * 1) Get the current start threshold
9532 	 * 2) Check for support
9533 	 * 3) Get the current stop threshold
9534 	 * 4) Check for support
9535 	 * 5) Get the current force discharge status
9536 	 * 6) Check for support
9537 	 * 7) Get the current inhibit charge status
9538 	 * 8) Check for support
9539 	 */
9540 	if (acpi_has_method(hkey_handle, GET_START)) {
9541 		if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_START, &ret, battery)) {
9542 			pr_err("Error probing battery %d\n", battery);
9543 			return -ENODEV;
9544 		}
9545 		/* Individual addressing is in bit 9 */
9546 		if (ret & BIT(9))
9547 			battery_info.individual_addressing = true;
9548 		/* Support is marked in bit 8 */
9549 		if (ret & BIT(8))
9550 			battery_info.batteries[battery].start_support = 1;
9551 		else
9552 			return -ENODEV;
9553 		if (tpacpi_battery_get(THRESHOLD_START, battery,
9554 			&battery_info.batteries[battery].charge_start)) {
9555 			pr_err("Error probing battery %d\n", battery);
9556 			return -ENODEV;
9557 		}
9558 	}
9559 	if (acpi_has_method(hkey_handle, GET_STOP)) {
9560 		if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_STOP, &ret, battery)) {
9561 			pr_err("Error probing battery stop; %d\n", battery);
9562 			return -ENODEV;
9563 		}
9564 		/* Support is marked in bit 8 */
9565 		if (ret & BIT(8))
9566 			battery_info.batteries[battery].stop_support = 1;
9567 		else
9568 			return -ENODEV;
9569 		if (tpacpi_battery_get(THRESHOLD_STOP, battery,
9570 			&battery_info.batteries[battery].charge_stop)) {
9571 			pr_err("Error probing battery stop: %d\n", battery);
9572 			return -ENODEV;
9573 		}
9574 	}
9575 	if (acpi_has_method(hkey_handle, GET_DISCHARGE)) {
9576 		if (ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_DISCHARGE, &ret, battery))) {
9577 			pr_err("Error probing battery discharge; %d\n", battery);
9578 			return -ENODEV;
9579 		}
9580 		/* Support is marked in bit 8 */
9581 		if (ret & BIT(8))
9582 			battery_info.batteries[battery].charge_behaviours |=
9583 				BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_FORCE_DISCHARGE);
9584 	}
9585 	if (acpi_has_method(hkey_handle, GET_INHIBIT)) {
9586 		if (ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_INHIBIT, &ret, battery))) {
9587 			pr_err("Error probing battery inhibit charge; %d\n", battery);
9588 			return -ENODEV;
9589 		}
9590 		/* Support is marked in bit 5 */
9591 		if (ret & BIT(5))
9592 			battery_info.batteries[battery].charge_behaviours |=
9593 				BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_INHIBIT_CHARGE);
9594 	}
9595 
9596 	battery_info.batteries[battery].charge_behaviours |=
9597 		BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_AUTO);
9598 
9599 	pr_info("battery %d registered (start %d, stop %d, behaviours: 0x%x)\n",
9600 		battery,
9601 		battery_info.batteries[battery].charge_start,
9602 		battery_info.batteries[battery].charge_stop,
9603 		battery_info.batteries[battery].charge_behaviours);
9604 
9605 	return 0;
9606 }
9607 
9608 /* General helper functions */
9609 
9610 static int tpacpi_battery_get_id(const char *battery_name)
9611 {
9612 
9613 	if (strcmp(battery_name, "BAT0") == 0 ||
9614 	    tp_features.battery_force_primary)
9615 		return BAT_PRIMARY;
9616 	if (strcmp(battery_name, "BAT1") == 0)
9617 		return BAT_SECONDARY;
9618 	/*
9619 	 * If for some reason the battery is not BAT0 nor is it
9620 	 * BAT1, we will assume it's the default, first battery,
9621 	 * AKA primary.
9622 	 */
9623 	pr_warn("unknown battery %s, assuming primary", battery_name);
9624 	return BAT_PRIMARY;
9625 }
9626 
9627 /* sysfs interface */
9628 
9629 static ssize_t tpacpi_battery_store(int what,
9630 				    struct device *dev,
9631 				    const char *buf, size_t count)
9632 {
9633 	struct power_supply *supply = to_power_supply(dev);
9634 	unsigned long value;
9635 	int battery, rval;
9636 	/*
9637 	 * Some systems have support for more than
9638 	 * one battery. If that is the case,
9639 	 * tpacpi_battery_probe marked that addressing
9640 	 * them individually is supported, so we do that
9641 	 * based on the device struct.
9642 	 *
9643 	 * On systems that are not supported, we assume
9644 	 * the primary as most of the ACPI calls fail
9645 	 * with "Any Battery" as the parameter.
9646 	 */
9647 	if (battery_info.individual_addressing)
9648 		/* BAT_PRIMARY or BAT_SECONDARY */
9649 		battery = tpacpi_battery_get_id(supply->desc->name);
9650 	else
9651 		battery = BAT_PRIMARY;
9652 
9653 	rval = kstrtoul(buf, 10, &value);
9654 	if (rval)
9655 		return rval;
9656 
9657 	switch (what) {
9658 	case THRESHOLD_START:
9659 		if (!battery_info.batteries[battery].start_support)
9660 			return -ENODEV;
9661 		/* valid values are [0, 99] */
9662 		if (value > 99)
9663 			return -EINVAL;
9664 		if (value > battery_info.batteries[battery].charge_stop)
9665 			return -EINVAL;
9666 		if (tpacpi_battery_set(THRESHOLD_START, battery, value))
9667 			return -ENODEV;
9668 		battery_info.batteries[battery].charge_start = value;
9669 		return count;
9670 
9671 	case THRESHOLD_STOP:
9672 		if (!battery_info.batteries[battery].stop_support)
9673 			return -ENODEV;
9674 		/* valid values are [1, 100] */
9675 		if (value < 1 || value > 100)
9676 			return -EINVAL;
9677 		if (value < battery_info.batteries[battery].charge_start)
9678 			return -EINVAL;
9679 		battery_info.batteries[battery].charge_stop = value;
9680 		/*
9681 		 * When 100 is passed to stop, we need to flip
9682 		 * it to 0 as that the EC understands that as
9683 		 * "Default", which will charge to 100%
9684 		 */
9685 		if (value == 100)
9686 			value = 0;
9687 		if (tpacpi_battery_set(THRESHOLD_STOP, battery, value))
9688 			return -EINVAL;
9689 		return count;
9690 	default:
9691 		pr_crit("Wrong parameter: %d", what);
9692 		return -EINVAL;
9693 	}
9694 	return count;
9695 }
9696 
9697 static ssize_t tpacpi_battery_show(int what,
9698 				   struct device *dev,
9699 				   char *buf)
9700 {
9701 	struct power_supply *supply = to_power_supply(dev);
9702 	int ret, battery;
9703 	/*
9704 	 * Some systems have support for more than
9705 	 * one battery. If that is the case,
9706 	 * tpacpi_battery_probe marked that addressing
9707 	 * them individually is supported, so we;
9708 	 * based on the device struct.
9709 	 *
9710 	 * On systems that are not supported, we assume
9711 	 * the primary as most of the ACPI calls fail
9712 	 * with "Any Battery" as the parameter.
9713 	 */
9714 	if (battery_info.individual_addressing)
9715 		/* BAT_PRIMARY or BAT_SECONDARY */
9716 		battery = tpacpi_battery_get_id(supply->desc->name);
9717 	else
9718 		battery = BAT_PRIMARY;
9719 	if (tpacpi_battery_get(what, battery, &ret))
9720 		return -ENODEV;
9721 	return sprintf(buf, "%d\n", ret);
9722 }
9723 
9724 static ssize_t charge_control_start_threshold_show(struct device *device,
9725 				struct device_attribute *attr,
9726 				char *buf)
9727 {
9728 	return tpacpi_battery_show(THRESHOLD_START, device, buf);
9729 }
9730 
9731 static ssize_t charge_control_end_threshold_show(struct device *device,
9732 				struct device_attribute *attr,
9733 				char *buf)
9734 {
9735 	return tpacpi_battery_show(THRESHOLD_STOP, device, buf);
9736 }
9737 
9738 static ssize_t charge_behaviour_show(struct device *dev,
9739 				     struct device_attribute *attr,
9740 				     char *buf)
9741 {
9742 	enum power_supply_charge_behaviour active = POWER_SUPPLY_CHARGE_BEHAVIOUR_AUTO;
9743 	struct power_supply *supply = to_power_supply(dev);
9744 	unsigned int available;
9745 	int ret, battery;
9746 
9747 	battery = tpacpi_battery_get_id(supply->desc->name);
9748 	available = battery_info.batteries[battery].charge_behaviours;
9749 
9750 	if (available & BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_FORCE_DISCHARGE)) {
9751 		if (tpacpi_battery_get(FORCE_DISCHARGE, battery, &ret))
9752 			return -ENODEV;
9753 		if (ret) {
9754 			active = POWER_SUPPLY_CHARGE_BEHAVIOUR_FORCE_DISCHARGE;
9755 			goto out;
9756 		}
9757 	}
9758 
9759 	if (available & BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_INHIBIT_CHARGE)) {
9760 		if (tpacpi_battery_get(INHIBIT_CHARGE, battery, &ret))
9761 			return -ENODEV;
9762 		if (ret) {
9763 			active = POWER_SUPPLY_CHARGE_BEHAVIOUR_INHIBIT_CHARGE;
9764 			goto out;
9765 		}
9766 	}
9767 
9768 out:
9769 	return power_supply_charge_behaviour_show(dev, available, active, buf);
9770 }
9771 
9772 static ssize_t charge_control_start_threshold_store(struct device *dev,
9773 				struct device_attribute *attr,
9774 				const char *buf, size_t count)
9775 {
9776 	return tpacpi_battery_store(THRESHOLD_START, dev, buf, count);
9777 }
9778 
9779 static ssize_t charge_control_end_threshold_store(struct device *dev,
9780 				struct device_attribute *attr,
9781 				const char *buf, size_t count)
9782 {
9783 	return tpacpi_battery_store(THRESHOLD_STOP, dev, buf, count);
9784 }
9785 
9786 static ssize_t charge_behaviour_store(struct device *dev,
9787 				      struct device_attribute *attr,
9788 				      const char *buf, size_t count)
9789 {
9790 	struct power_supply *supply = to_power_supply(dev);
9791 	int selected, battery, ret = 0;
9792 	unsigned int available;
9793 
9794 	battery = tpacpi_battery_get_id(supply->desc->name);
9795 	available = battery_info.batteries[battery].charge_behaviours;
9796 	selected = power_supply_charge_behaviour_parse(available, buf);
9797 
9798 	if (selected < 0)
9799 		return selected;
9800 
9801 	switch (selected) {
9802 	case POWER_SUPPLY_CHARGE_BEHAVIOUR_AUTO:
9803 		if (available & BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_FORCE_DISCHARGE))
9804 			ret = tpacpi_battery_set_validate(FORCE_DISCHARGE, battery, 0);
9805 		if (available & BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_INHIBIT_CHARGE))
9806 			ret = min(ret, tpacpi_battery_set_validate(INHIBIT_CHARGE, battery, 0));
9807 		if (ret < 0)
9808 			return ret;
9809 		break;
9810 	case POWER_SUPPLY_CHARGE_BEHAVIOUR_FORCE_DISCHARGE:
9811 		if (available & BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_INHIBIT_CHARGE))
9812 			ret = tpacpi_battery_set_validate(INHIBIT_CHARGE, battery, 0);
9813 		ret = min(ret, tpacpi_battery_set_validate(FORCE_DISCHARGE, battery, 1));
9814 		if (ret < 0)
9815 			return ret;
9816 		break;
9817 	case POWER_SUPPLY_CHARGE_BEHAVIOUR_INHIBIT_CHARGE:
9818 		if (available & BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_FORCE_DISCHARGE))
9819 			ret = tpacpi_battery_set_validate(FORCE_DISCHARGE, battery, 0);
9820 		ret = min(ret, tpacpi_battery_set_validate(INHIBIT_CHARGE, battery, 1));
9821 		if (ret < 0)
9822 			return ret;
9823 		break;
9824 	default:
9825 		dev_err(dev, "Unexpected charge behaviour: %d\n", selected);
9826 		return -EINVAL;
9827 	}
9828 
9829 	return count;
9830 }
9831 
9832 static DEVICE_ATTR_RW(charge_control_start_threshold);
9833 static DEVICE_ATTR_RW(charge_control_end_threshold);
9834 static DEVICE_ATTR_RW(charge_behaviour);
9835 static struct device_attribute dev_attr_charge_start_threshold = __ATTR(
9836 	charge_start_threshold,
9837 	0644,
9838 	charge_control_start_threshold_show,
9839 	charge_control_start_threshold_store
9840 );
9841 static struct device_attribute dev_attr_charge_stop_threshold = __ATTR(
9842 	charge_stop_threshold,
9843 	0644,
9844 	charge_control_end_threshold_show,
9845 	charge_control_end_threshold_store
9846 );
9847 
9848 static struct attribute *tpacpi_battery_attrs[] = {
9849 	&dev_attr_charge_control_start_threshold.attr,
9850 	&dev_attr_charge_control_end_threshold.attr,
9851 	&dev_attr_charge_start_threshold.attr,
9852 	&dev_attr_charge_stop_threshold.attr,
9853 	&dev_attr_charge_behaviour.attr,
9854 	NULL,
9855 };
9856 
9857 ATTRIBUTE_GROUPS(tpacpi_battery);
9858 
9859 /* ACPI battery hooking */
9860 
9861 static int tpacpi_battery_add(struct power_supply *battery, struct acpi_battery_hook *hook)
9862 {
9863 	int batteryid = tpacpi_battery_get_id(battery->desc->name);
9864 
9865 	if (tpacpi_battery_probe(batteryid))
9866 		return -ENODEV;
9867 	if (device_add_groups(&battery->dev, tpacpi_battery_groups))
9868 		return -ENODEV;
9869 	return 0;
9870 }
9871 
9872 static int tpacpi_battery_remove(struct power_supply *battery, struct acpi_battery_hook *hook)
9873 {
9874 	device_remove_groups(&battery->dev, tpacpi_battery_groups);
9875 	return 0;
9876 }
9877 
9878 static struct acpi_battery_hook battery_hook = {
9879 	.add_battery = tpacpi_battery_add,
9880 	.remove_battery = tpacpi_battery_remove,
9881 	.name = "ThinkPad Battery Extension",
9882 };
9883 
9884 /* Subdriver init/exit */
9885 
9886 static const struct tpacpi_quirk battery_quirk_table[] __initconst = {
9887 	/*
9888 	 * Individual addressing is broken on models that expose the
9889 	 * primary battery as BAT1.
9890 	 */
9891 	TPACPI_Q_LNV('8', 'F', true),       /* Thinkpad X120e */
9892 	TPACPI_Q_LNV('J', '7', true),       /* B5400 */
9893 	TPACPI_Q_LNV('J', 'I', true),       /* Thinkpad 11e */
9894 	TPACPI_Q_LNV3('R', '0', 'B', true), /* Thinkpad 11e gen 3 */
9895 	TPACPI_Q_LNV3('R', '0', 'C', true), /* Thinkpad 13 */
9896 	TPACPI_Q_LNV3('R', '0', 'J', true), /* Thinkpad 13 gen 2 */
9897 	TPACPI_Q_LNV3('R', '0', 'K', true), /* Thinkpad 11e gen 4 celeron BIOS */
9898 };
9899 
9900 static int __init tpacpi_battery_init(struct ibm_init_struct *ibm)
9901 {
9902 	memset(&battery_info, 0, sizeof(battery_info));
9903 
9904 	tp_features.battery_force_primary = tpacpi_check_quirks(
9905 					battery_quirk_table,
9906 					ARRAY_SIZE(battery_quirk_table));
9907 
9908 	battery_hook_register(&battery_hook);
9909 	return 0;
9910 }
9911 
9912 static void tpacpi_battery_exit(void)
9913 {
9914 	battery_hook_unregister(&battery_hook);
9915 }
9916 
9917 static struct ibm_struct battery_driver_data = {
9918 	.name = "battery",
9919 	.exit = tpacpi_battery_exit,
9920 };
9921 
9922 /*************************************************************************
9923  * LCD Shadow subdriver, for the Lenovo PrivacyGuard feature
9924  */
9925 
9926 static struct drm_privacy_screen *lcdshadow_dev;
9927 static acpi_handle lcdshadow_get_handle;
9928 static acpi_handle lcdshadow_set_handle;
9929 
9930 static int lcdshadow_set_sw_state(struct drm_privacy_screen *priv,
9931 				  enum drm_privacy_screen_status state)
9932 {
9933 	int output;
9934 
9935 	if (WARN_ON(!mutex_is_locked(&priv->lock)))
9936 		return -EIO;
9937 
9938 	if (!acpi_evalf(lcdshadow_set_handle, &output, NULL, "dd", (int)state))
9939 		return -EIO;
9940 
9941 	priv->hw_state = priv->sw_state = state;
9942 	return 0;
9943 }
9944 
9945 static void lcdshadow_get_hw_state(struct drm_privacy_screen *priv)
9946 {
9947 	int output;
9948 
9949 	if (!acpi_evalf(lcdshadow_get_handle, &output, NULL, "dd", 0))
9950 		return;
9951 
9952 	priv->hw_state = priv->sw_state = output & 0x1;
9953 }
9954 
9955 static const struct drm_privacy_screen_ops lcdshadow_ops = {
9956 	.set_sw_state = lcdshadow_set_sw_state,
9957 	.get_hw_state = lcdshadow_get_hw_state,
9958 };
9959 
9960 static int tpacpi_lcdshadow_init(struct ibm_init_struct *iibm)
9961 {
9962 	acpi_status status1, status2;
9963 	int output;
9964 
9965 	status1 = acpi_get_handle(hkey_handle, "GSSS", &lcdshadow_get_handle);
9966 	status2 = acpi_get_handle(hkey_handle, "SSSS", &lcdshadow_set_handle);
9967 	if (ACPI_FAILURE(status1) || ACPI_FAILURE(status2))
9968 		return 0;
9969 
9970 	if (!acpi_evalf(lcdshadow_get_handle, &output, NULL, "dd", 0))
9971 		return -EIO;
9972 
9973 	if (!(output & 0x10000))
9974 		return 0;
9975 
9976 	lcdshadow_dev = drm_privacy_screen_register(&tpacpi_pdev->dev,
9977 						    &lcdshadow_ops, NULL);
9978 	if (IS_ERR(lcdshadow_dev))
9979 		return PTR_ERR(lcdshadow_dev);
9980 
9981 	return 0;
9982 }
9983 
9984 static void lcdshadow_exit(void)
9985 {
9986 	drm_privacy_screen_unregister(lcdshadow_dev);
9987 }
9988 
9989 static void lcdshadow_resume(void)
9990 {
9991 	if (!lcdshadow_dev)
9992 		return;
9993 
9994 	mutex_lock(&lcdshadow_dev->lock);
9995 	lcdshadow_set_sw_state(lcdshadow_dev, lcdshadow_dev->sw_state);
9996 	mutex_unlock(&lcdshadow_dev->lock);
9997 }
9998 
9999 static int lcdshadow_read(struct seq_file *m)
10000 {
10001 	if (!lcdshadow_dev) {
10002 		seq_puts(m, "status:\t\tnot supported\n");
10003 	} else {
10004 		seq_printf(m, "status:\t\t%d\n", lcdshadow_dev->hw_state);
10005 		seq_puts(m, "commands:\t0, 1\n");
10006 	}
10007 
10008 	return 0;
10009 }
10010 
10011 static int lcdshadow_write(char *buf)
10012 {
10013 	char *cmd;
10014 	int res, state = -EINVAL;
10015 
10016 	if (!lcdshadow_dev)
10017 		return -ENODEV;
10018 
10019 	while ((cmd = strsep(&buf, ","))) {
10020 		res = kstrtoint(cmd, 10, &state);
10021 		if (res < 0)
10022 			return res;
10023 	}
10024 
10025 	if (state >= 2 || state < 0)
10026 		return -EINVAL;
10027 
10028 	mutex_lock(&lcdshadow_dev->lock);
10029 	res = lcdshadow_set_sw_state(lcdshadow_dev, state);
10030 	mutex_unlock(&lcdshadow_dev->lock);
10031 
10032 	drm_privacy_screen_call_notifier_chain(lcdshadow_dev);
10033 
10034 	return res;
10035 }
10036 
10037 static struct ibm_struct lcdshadow_driver_data = {
10038 	.name = "lcdshadow",
10039 	.exit = lcdshadow_exit,
10040 	.resume = lcdshadow_resume,
10041 	.read = lcdshadow_read,
10042 	.write = lcdshadow_write,
10043 };
10044 
10045 /*************************************************************************
10046  * Thinkpad sensor interfaces
10047  */
10048 
10049 #define DYTC_CMD_QUERY        0 /* To get DYTC status - enable/revision */
10050 #define DYTC_QUERY_ENABLE_BIT 8  /* Bit        8 - 0 = disabled, 1 = enabled */
10051 #define DYTC_QUERY_SUBREV_BIT 16 /* Bits 16 - 27 - sub revision */
10052 #define DYTC_QUERY_REV_BIT    28 /* Bits 28 - 31 - revision */
10053 
10054 #define DYTC_CMD_GET          2 /* To get current IC function and mode */
10055 #define DYTC_GET_LAPMODE_BIT 17 /* Set when in lapmode */
10056 
10057 #define PALMSENSOR_PRESENT_BIT 0 /* Determine if psensor present */
10058 #define PALMSENSOR_ON_BIT      1 /* psensor status */
10059 
10060 static bool has_palmsensor;
10061 static bool has_lapsensor;
10062 static bool palm_state;
10063 static bool lap_state;
10064 static int dytc_version;
10065 
10066 static int dytc_command(int command, int *output)
10067 {
10068 	acpi_handle dytc_handle;
10069 
10070 	if (ACPI_FAILURE(acpi_get_handle(hkey_handle, "DYTC", &dytc_handle))) {
10071 		/* Platform doesn't support DYTC */
10072 		return -ENODEV;
10073 	}
10074 	if (!acpi_evalf(dytc_handle, output, NULL, "dd", command))
10075 		return -EIO;
10076 	return 0;
10077 }
10078 
10079 static int lapsensor_get(bool *present, bool *state)
10080 {
10081 	int output, err;
10082 
10083 	*present = false;
10084 	err = dytc_command(DYTC_CMD_GET, &output);
10085 	if (err)
10086 		return err;
10087 
10088 	*present = true; /*If we get his far, we have lapmode support*/
10089 	*state = output & BIT(DYTC_GET_LAPMODE_BIT) ? true : false;
10090 	return 0;
10091 }
10092 
10093 static int palmsensor_get(bool *present, bool *state)
10094 {
10095 	acpi_handle psensor_handle;
10096 	int output;
10097 
10098 	*present = false;
10099 	if (ACPI_FAILURE(acpi_get_handle(hkey_handle, "GPSS", &psensor_handle)))
10100 		return -ENODEV;
10101 	if (!acpi_evalf(psensor_handle, &output, NULL, "d"))
10102 		return -EIO;
10103 
10104 	*present = output & BIT(PALMSENSOR_PRESENT_BIT) ? true : false;
10105 	*state = output & BIT(PALMSENSOR_ON_BIT) ? true : false;
10106 	return 0;
10107 }
10108 
10109 static void lapsensor_refresh(void)
10110 {
10111 	bool state;
10112 	int err;
10113 
10114 	if (has_lapsensor) {
10115 		err = lapsensor_get(&has_lapsensor, &state);
10116 		if (err)
10117 			return;
10118 		if (lap_state != state) {
10119 			lap_state = state;
10120 			sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, "dytc_lapmode");
10121 		}
10122 	}
10123 }
10124 
10125 static void palmsensor_refresh(void)
10126 {
10127 	bool state;
10128 	int err;
10129 
10130 	if (has_palmsensor) {
10131 		err = palmsensor_get(&has_palmsensor, &state);
10132 		if (err)
10133 			return;
10134 		if (palm_state != state) {
10135 			palm_state = state;
10136 			sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, "palmsensor");
10137 		}
10138 	}
10139 }
10140 
10141 static ssize_t dytc_lapmode_show(struct device *dev,
10142 					struct device_attribute *attr,
10143 					char *buf)
10144 {
10145 	if (has_lapsensor)
10146 		return sysfs_emit(buf, "%d\n", lap_state);
10147 	return sysfs_emit(buf, "\n");
10148 }
10149 static DEVICE_ATTR_RO(dytc_lapmode);
10150 
10151 static ssize_t palmsensor_show(struct device *dev,
10152 					struct device_attribute *attr,
10153 					char *buf)
10154 {
10155 	if (has_palmsensor)
10156 		return sysfs_emit(buf, "%d\n", palm_state);
10157 	return sysfs_emit(buf, "\n");
10158 }
10159 static DEVICE_ATTR_RO(palmsensor);
10160 
10161 static struct attribute *proxsensor_attributes[] = {
10162 	&dev_attr_dytc_lapmode.attr,
10163 	&dev_attr_palmsensor.attr,
10164 	NULL
10165 };
10166 
10167 static umode_t proxsensor_attr_is_visible(struct kobject *kobj,
10168 					  struct attribute *attr, int n)
10169 {
10170 	if (attr == &dev_attr_dytc_lapmode.attr) {
10171 		/*
10172 		 * Platforms before DYTC version 5 claim to have a lap sensor,
10173 		 * but it doesn't work, so we ignore them.
10174 		 */
10175 		if (!has_lapsensor || dytc_version < 5)
10176 			return 0;
10177 	} else if (attr == &dev_attr_palmsensor.attr) {
10178 		if (!has_palmsensor)
10179 			return 0;
10180 	}
10181 
10182 	return attr->mode;
10183 }
10184 
10185 static const struct attribute_group proxsensor_attr_group = {
10186 	.is_visible = proxsensor_attr_is_visible,
10187 	.attrs = proxsensor_attributes,
10188 };
10189 
10190 static int tpacpi_proxsensor_init(struct ibm_init_struct *iibm)
10191 {
10192 	int palm_err, lap_err;
10193 
10194 	palm_err = palmsensor_get(&has_palmsensor, &palm_state);
10195 	lap_err = lapsensor_get(&has_lapsensor, &lap_state);
10196 	/* If support isn't available for both devices return -ENODEV */
10197 	if ((palm_err == -ENODEV) && (lap_err == -ENODEV))
10198 		return -ENODEV;
10199 	/* Otherwise, if there was an error return it */
10200 	if (palm_err && (palm_err != -ENODEV))
10201 		return palm_err;
10202 	if (lap_err && (lap_err != -ENODEV))
10203 		return lap_err;
10204 
10205 	return 0;
10206 }
10207 
10208 static struct ibm_struct proxsensor_driver_data = {
10209 	.name = "proximity-sensor",
10210 };
10211 
10212 /*************************************************************************
10213  * DYTC Platform Profile interface
10214  */
10215 
10216 #define DYTC_CMD_SET          1 /* To enable/disable IC function mode */
10217 #define DYTC_CMD_MMC_GET      8 /* To get current MMC function and mode */
10218 #define DYTC_CMD_RESET    0x1ff /* To reset back to default */
10219 
10220 #define DYTC_CMD_FUNC_CAP     3 /* To get DYTC capabilities */
10221 #define DYTC_FC_MMC           27 /* MMC Mode supported */
10222 #define DYTC_FC_PSC           29 /* PSC Mode supported */
10223 #define DYTC_FC_AMT           31 /* AMT mode supported */
10224 
10225 #define DYTC_GET_FUNCTION_BIT 8  /* Bits  8-11 - function setting */
10226 #define DYTC_GET_MODE_BIT     12 /* Bits 12-15 - mode setting */
10227 
10228 #define DYTC_SET_FUNCTION_BIT 12 /* Bits 12-15 - function setting */
10229 #define DYTC_SET_MODE_BIT     16 /* Bits 16-19 - mode setting */
10230 #define DYTC_SET_VALID_BIT    20 /* Bit     20 - 1 = on, 0 = off */
10231 
10232 #define DYTC_FUNCTION_STD     0  /* Function = 0, standard mode */
10233 #define DYTC_FUNCTION_CQL     1  /* Function = 1, lap mode */
10234 #define DYTC_FUNCTION_MMC     11 /* Function = 11, MMC mode */
10235 #define DYTC_FUNCTION_PSC     13 /* Function = 13, PSC mode */
10236 #define DYTC_FUNCTION_AMT     15 /* Function = 15, AMT mode */
10237 
10238 #define DYTC_MODE_AMT_ENABLE   0x1 /* Enable AMT (in balanced mode) */
10239 #define DYTC_MODE_AMT_DISABLE  0xF /* Disable AMT (in other modes) */
10240 
10241 #define DYTC_MODE_MMC_PERFORM  2  /* High power mode aka performance */
10242 #define DYTC_MODE_MMC_LOWPOWER 3  /* Low power mode */
10243 #define DYTC_MODE_MMC_BALANCE  0xF  /* Default mode aka balanced */
10244 #define DYTC_MODE_MMC_DEFAULT  0  /* Default mode from MMC_GET, aka balanced */
10245 
10246 #define DYTC_MODE_PSC_LOWPOWER 3  /* Low power mode */
10247 #define DYTC_MODE_PSC_BALANCE  5  /* Default mode aka balanced */
10248 #define DYTC_MODE_PSC_PERFORM  7  /* High power mode aka performance */
10249 
10250 #define DYTC_ERR_MASK       0xF  /* Bits 0-3 in cmd result are the error result */
10251 #define DYTC_ERR_SUCCESS      1  /* CMD completed successful */
10252 
10253 #define DYTC_SET_COMMAND(function, mode, on) \
10254 	(DYTC_CMD_SET | (function) << DYTC_SET_FUNCTION_BIT | \
10255 	 (mode) << DYTC_SET_MODE_BIT | \
10256 	 (on) << DYTC_SET_VALID_BIT)
10257 
10258 #define DYTC_DISABLE_CQL DYTC_SET_COMMAND(DYTC_FUNCTION_CQL, DYTC_MODE_MMC_BALANCE, 0)
10259 #define DYTC_ENABLE_CQL DYTC_SET_COMMAND(DYTC_FUNCTION_CQL, DYTC_MODE_MMC_BALANCE, 1)
10260 static int dytc_control_amt(bool enable);
10261 static bool dytc_amt_active;
10262 
10263 static enum platform_profile_option dytc_current_profile;
10264 static atomic_t dytc_ignore_event = ATOMIC_INIT(0);
10265 static DEFINE_MUTEX(dytc_mutex);
10266 static int dytc_capabilities;
10267 static bool dytc_mmc_get_available;
10268 static int profile_force;
10269 
10270 static int convert_dytc_to_profile(int funcmode, int dytcmode,
10271 		enum platform_profile_option *profile)
10272 {
10273 	switch (funcmode) {
10274 	case DYTC_FUNCTION_MMC:
10275 		switch (dytcmode) {
10276 		case DYTC_MODE_MMC_LOWPOWER:
10277 			*profile = PLATFORM_PROFILE_LOW_POWER;
10278 			break;
10279 		case DYTC_MODE_MMC_DEFAULT:
10280 		case DYTC_MODE_MMC_BALANCE:
10281 			*profile =  PLATFORM_PROFILE_BALANCED;
10282 			break;
10283 		case DYTC_MODE_MMC_PERFORM:
10284 			*profile =  PLATFORM_PROFILE_PERFORMANCE;
10285 			break;
10286 		default: /* Unknown mode */
10287 			return -EINVAL;
10288 		}
10289 		return 0;
10290 	case DYTC_FUNCTION_PSC:
10291 		switch (dytcmode) {
10292 		case DYTC_MODE_PSC_LOWPOWER:
10293 			*profile = PLATFORM_PROFILE_LOW_POWER;
10294 			break;
10295 		case DYTC_MODE_PSC_BALANCE:
10296 			*profile =  PLATFORM_PROFILE_BALANCED;
10297 			break;
10298 		case DYTC_MODE_PSC_PERFORM:
10299 			*profile =  PLATFORM_PROFILE_PERFORMANCE;
10300 			break;
10301 		default: /* Unknown mode */
10302 			return -EINVAL;
10303 		}
10304 		return 0;
10305 	case DYTC_FUNCTION_AMT:
10306 		/* For now return balanced. It's the closest we have to 'auto' */
10307 		*profile =  PLATFORM_PROFILE_BALANCED;
10308 		return 0;
10309 	default:
10310 		/* Unknown function */
10311 		pr_debug("unknown function 0x%x\n", funcmode);
10312 		return -EOPNOTSUPP;
10313 	}
10314 	return 0;
10315 }
10316 
10317 static int convert_profile_to_dytc(enum platform_profile_option profile, int *perfmode)
10318 {
10319 	switch (profile) {
10320 	case PLATFORM_PROFILE_LOW_POWER:
10321 		if (dytc_capabilities & BIT(DYTC_FC_MMC))
10322 			*perfmode = DYTC_MODE_MMC_LOWPOWER;
10323 		else if (dytc_capabilities & BIT(DYTC_FC_PSC))
10324 			*perfmode = DYTC_MODE_PSC_LOWPOWER;
10325 		break;
10326 	case PLATFORM_PROFILE_BALANCED:
10327 		if (dytc_capabilities & BIT(DYTC_FC_MMC))
10328 			*perfmode = DYTC_MODE_MMC_BALANCE;
10329 		else if (dytc_capabilities & BIT(DYTC_FC_PSC))
10330 			*perfmode = DYTC_MODE_PSC_BALANCE;
10331 		break;
10332 	case PLATFORM_PROFILE_PERFORMANCE:
10333 		if (dytc_capabilities & BIT(DYTC_FC_MMC))
10334 			*perfmode = DYTC_MODE_MMC_PERFORM;
10335 		else if (dytc_capabilities & BIT(DYTC_FC_PSC))
10336 			*perfmode = DYTC_MODE_PSC_PERFORM;
10337 		break;
10338 	default: /* Unknown profile */
10339 		return -EOPNOTSUPP;
10340 	}
10341 	return 0;
10342 }
10343 
10344 /*
10345  * dytc_profile_get: Function to register with platform_profile
10346  * handler. Returns current platform profile.
10347  */
10348 static int dytc_profile_get(struct platform_profile_handler *pprof,
10349 			    enum platform_profile_option *profile)
10350 {
10351 	*profile = dytc_current_profile;
10352 	return 0;
10353 }
10354 
10355 static int dytc_control_amt(bool enable)
10356 {
10357 	int dummy;
10358 	int err;
10359 	int cmd;
10360 
10361 	if (!(dytc_capabilities & BIT(DYTC_FC_AMT))) {
10362 		pr_warn("Attempting to toggle AMT on a system that doesn't advertise support\n");
10363 		return -ENODEV;
10364 	}
10365 
10366 	if (enable)
10367 		cmd = DYTC_SET_COMMAND(DYTC_FUNCTION_AMT, DYTC_MODE_AMT_ENABLE, enable);
10368 	else
10369 		cmd = DYTC_SET_COMMAND(DYTC_FUNCTION_AMT, DYTC_MODE_AMT_DISABLE, enable);
10370 
10371 	pr_debug("%sabling AMT (cmd 0x%x)", enable ? "en":"dis", cmd);
10372 	err = dytc_command(cmd, &dummy);
10373 	if (err)
10374 		return err;
10375 	dytc_amt_active = enable;
10376 	return 0;
10377 }
10378 
10379 /*
10380  * Helper function - check if we are in CQL mode and if we are
10381  *  -  disable CQL,
10382  *  - run the command
10383  *  - enable CQL
10384  *  If not in CQL mode, just run the command
10385  */
10386 static int dytc_cql_command(int command, int *output)
10387 {
10388 	int err, cmd_err, dummy;
10389 	int cur_funcmode;
10390 
10391 	/* Determine if we are in CQL mode. This alters the commands we do */
10392 	err = dytc_command(DYTC_CMD_GET, output);
10393 	if (err)
10394 		return err;
10395 
10396 	cur_funcmode = (*output >> DYTC_GET_FUNCTION_BIT) & 0xF;
10397 	/* Check if we're OK to return immediately */
10398 	if ((command == DYTC_CMD_GET) && (cur_funcmode != DYTC_FUNCTION_CQL))
10399 		return 0;
10400 
10401 	if (cur_funcmode == DYTC_FUNCTION_CQL) {
10402 		atomic_inc(&dytc_ignore_event);
10403 		err = dytc_command(DYTC_DISABLE_CQL, &dummy);
10404 		if (err)
10405 			return err;
10406 	}
10407 
10408 	cmd_err = dytc_command(command,	output);
10409 	/* Check return condition after we've restored CQL state */
10410 
10411 	if (cur_funcmode == DYTC_FUNCTION_CQL) {
10412 		err = dytc_command(DYTC_ENABLE_CQL, &dummy);
10413 		if (err)
10414 			return err;
10415 	}
10416 	return cmd_err;
10417 }
10418 
10419 /*
10420  * dytc_profile_set: Function to register with platform_profile
10421  * handler. Sets current platform profile.
10422  */
10423 static int dytc_profile_set(struct platform_profile_handler *pprof,
10424 			    enum platform_profile_option profile)
10425 {
10426 	int perfmode;
10427 	int output;
10428 	int err;
10429 
10430 	err = mutex_lock_interruptible(&dytc_mutex);
10431 	if (err)
10432 		return err;
10433 
10434 	err = convert_profile_to_dytc(profile, &perfmode);
10435 	if (err)
10436 		goto unlock;
10437 
10438 	if (dytc_capabilities & BIT(DYTC_FC_MMC)) {
10439 		if (profile == PLATFORM_PROFILE_BALANCED) {
10440 			/*
10441 			 * To get back to balanced mode we need to issue a reset command.
10442 			 * Note we still need to disable CQL mode before hand and re-enable
10443 			 * it afterwards, otherwise dytc_lapmode gets reset to 0 and stays
10444 			 * stuck at 0 for aprox. 30 minutes.
10445 			 */
10446 			err = dytc_cql_command(DYTC_CMD_RESET, &output);
10447 			if (err)
10448 				goto unlock;
10449 		} else {
10450 			/* Determine if we are in CQL mode. This alters the commands we do */
10451 			err = dytc_cql_command(DYTC_SET_COMMAND(DYTC_FUNCTION_MMC, perfmode, 1),
10452 						&output);
10453 			if (err)
10454 				goto unlock;
10455 		}
10456 	} else if (dytc_capabilities & BIT(DYTC_FC_PSC)) {
10457 		err = dytc_command(DYTC_SET_COMMAND(DYTC_FUNCTION_PSC, perfmode, 1), &output);
10458 		if (err)
10459 			goto unlock;
10460 
10461 		/* system supports AMT, activate it when on balanced */
10462 		if (dytc_capabilities & BIT(DYTC_FC_AMT))
10463 			dytc_control_amt(profile == PLATFORM_PROFILE_BALANCED);
10464 	}
10465 	/* Success - update current profile */
10466 	dytc_current_profile = profile;
10467 unlock:
10468 	mutex_unlock(&dytc_mutex);
10469 	return err;
10470 }
10471 
10472 static void dytc_profile_refresh(void)
10473 {
10474 	enum platform_profile_option profile;
10475 	int output = 0, err = 0;
10476 	int perfmode, funcmode = 0;
10477 
10478 	mutex_lock(&dytc_mutex);
10479 	if (dytc_capabilities & BIT(DYTC_FC_MMC)) {
10480 		if (dytc_mmc_get_available)
10481 			err = dytc_command(DYTC_CMD_MMC_GET, &output);
10482 		else
10483 			err = dytc_cql_command(DYTC_CMD_GET, &output);
10484 		funcmode = DYTC_FUNCTION_MMC;
10485 	} else if (dytc_capabilities & BIT(DYTC_FC_PSC)) {
10486 		err = dytc_command(DYTC_CMD_GET, &output);
10487 		/* Check if we are PSC mode, or have AMT enabled */
10488 		funcmode = (output >> DYTC_GET_FUNCTION_BIT) & 0xF;
10489 	} else { /* Unknown profile mode */
10490 		err = -ENODEV;
10491 	}
10492 	mutex_unlock(&dytc_mutex);
10493 	if (err)
10494 		return;
10495 
10496 	perfmode = (output >> DYTC_GET_MODE_BIT) & 0xF;
10497 	err = convert_dytc_to_profile(funcmode, perfmode, &profile);
10498 	if (!err && profile != dytc_current_profile) {
10499 		dytc_current_profile = profile;
10500 		platform_profile_notify();
10501 	}
10502 }
10503 
10504 static struct platform_profile_handler dytc_profile = {
10505 	.profile_get = dytc_profile_get,
10506 	.profile_set = dytc_profile_set,
10507 };
10508 
10509 static int tpacpi_dytc_profile_init(struct ibm_init_struct *iibm)
10510 {
10511 	int err, output;
10512 
10513 	/* Setup supported modes */
10514 	set_bit(PLATFORM_PROFILE_LOW_POWER, dytc_profile.choices);
10515 	set_bit(PLATFORM_PROFILE_BALANCED, dytc_profile.choices);
10516 	set_bit(PLATFORM_PROFILE_PERFORMANCE, dytc_profile.choices);
10517 
10518 	err = dytc_command(DYTC_CMD_QUERY, &output);
10519 	if (err)
10520 		return err;
10521 
10522 	if (output & BIT(DYTC_QUERY_ENABLE_BIT))
10523 		dytc_version = (output >> DYTC_QUERY_REV_BIT) & 0xF;
10524 
10525 	/* Check DYTC is enabled and supports mode setting */
10526 	if (dytc_version < 5)
10527 		return -ENODEV;
10528 
10529 	/* Check what capabilities are supported */
10530 	err = dytc_command(DYTC_CMD_FUNC_CAP, &dytc_capabilities);
10531 	if (err)
10532 		return err;
10533 
10534 	/* Check if user wants to override the profile selection */
10535 	if (profile_force) {
10536 		switch (profile_force) {
10537 		case -1:
10538 			dytc_capabilities = 0;
10539 			break;
10540 		case 1:
10541 			dytc_capabilities = BIT(DYTC_FC_MMC);
10542 			break;
10543 		case 2:
10544 			dytc_capabilities = BIT(DYTC_FC_PSC);
10545 			break;
10546 		}
10547 		pr_debug("Profile selection forced: 0x%x\n", dytc_capabilities);
10548 	}
10549 	if (dytc_capabilities & BIT(DYTC_FC_MMC)) { /* MMC MODE */
10550 		pr_debug("MMC is supported\n");
10551 		/*
10552 		 * Check if MMC_GET functionality available
10553 		 * Version > 6 and return success from MMC_GET command
10554 		 */
10555 		dytc_mmc_get_available = false;
10556 		if (dytc_version >= 6) {
10557 			err = dytc_command(DYTC_CMD_MMC_GET, &output);
10558 			if (!err && ((output & DYTC_ERR_MASK) == DYTC_ERR_SUCCESS))
10559 				dytc_mmc_get_available = true;
10560 		}
10561 	} else if (dytc_capabilities & BIT(DYTC_FC_PSC)) { /* PSC MODE */
10562 		pr_debug("PSC is supported\n");
10563 	} else {
10564 		dbg_printk(TPACPI_DBG_INIT, "No DYTC support available\n");
10565 		return -ENODEV;
10566 	}
10567 
10568 	dbg_printk(TPACPI_DBG_INIT,
10569 			"DYTC version %d: thermal mode available\n", dytc_version);
10570 
10571 	/* Create platform_profile structure and register */
10572 	err = platform_profile_register(&dytc_profile);
10573 	/*
10574 	 * If for some reason platform_profiles aren't enabled
10575 	 * don't quit terminally.
10576 	 */
10577 	if (err)
10578 		return -ENODEV;
10579 
10580 	/* Ensure initial values are correct */
10581 	dytc_profile_refresh();
10582 
10583 	/* Workaround for https://bugzilla.kernel.org/show_bug.cgi?id=216347 */
10584 	if (dytc_capabilities & BIT(DYTC_FC_PSC))
10585 		dytc_profile_set(NULL, PLATFORM_PROFILE_BALANCED);
10586 
10587 	return 0;
10588 }
10589 
10590 static void dytc_profile_exit(void)
10591 {
10592 	platform_profile_remove();
10593 }
10594 
10595 static struct ibm_struct  dytc_profile_driver_data = {
10596 	.name = "dytc-profile",
10597 	.exit = dytc_profile_exit,
10598 };
10599 
10600 /*************************************************************************
10601  * Keyboard language interface
10602  */
10603 
10604 struct keyboard_lang_data {
10605 	const char *lang_str;
10606 	int lang_code;
10607 };
10608 
10609 static const struct keyboard_lang_data keyboard_lang_data[] = {
10610 	{"be", 0x080c},
10611 	{"cz", 0x0405},
10612 	{"da", 0x0406},
10613 	{"de", 0x0c07},
10614 	{"en", 0x0000},
10615 	{"es", 0x2c0a},
10616 	{"et", 0x0425},
10617 	{"fr", 0x040c},
10618 	{"fr-ch", 0x100c},
10619 	{"hu", 0x040e},
10620 	{"it", 0x0410},
10621 	{"jp", 0x0411},
10622 	{"nl", 0x0413},
10623 	{"nn", 0x0414},
10624 	{"pl", 0x0415},
10625 	{"pt", 0x0816},
10626 	{"sl", 0x041b},
10627 	{"sv", 0x081d},
10628 	{"tr", 0x041f},
10629 };
10630 
10631 static int set_keyboard_lang_command(int command)
10632 {
10633 	acpi_handle sskl_handle;
10634 	int output;
10635 
10636 	if (ACPI_FAILURE(acpi_get_handle(hkey_handle, "SSKL", &sskl_handle))) {
10637 		/* Platform doesn't support SSKL */
10638 		return -ENODEV;
10639 	}
10640 
10641 	if (!acpi_evalf(sskl_handle, &output, NULL, "dd", command))
10642 		return -EIO;
10643 
10644 	return 0;
10645 }
10646 
10647 static int get_keyboard_lang(int *output)
10648 {
10649 	acpi_handle gskl_handle;
10650 	int kbd_lang;
10651 
10652 	if (ACPI_FAILURE(acpi_get_handle(hkey_handle, "GSKL", &gskl_handle))) {
10653 		/* Platform doesn't support GSKL */
10654 		return -ENODEV;
10655 	}
10656 
10657 	if (!acpi_evalf(gskl_handle, &kbd_lang, NULL, "dd", 0x02000000))
10658 		return -EIO;
10659 
10660 	/*
10661 	 * METHOD_ERR gets returned on devices where there are no special (e.g. '=',
10662 	 * '(' and ')') keys which use layout dependent key-press emulation.
10663 	 */
10664 	if (kbd_lang & METHOD_ERR)
10665 		return -ENODEV;
10666 
10667 	*output = kbd_lang;
10668 
10669 	return 0;
10670 }
10671 
10672 /* sysfs keyboard language entry */
10673 static ssize_t keyboard_lang_show(struct device *dev,
10674 				struct device_attribute *attr,
10675 				char *buf)
10676 {
10677 	int output, err, i, len = 0;
10678 
10679 	err = get_keyboard_lang(&output);
10680 	if (err)
10681 		return err;
10682 
10683 	for (i = 0; i < ARRAY_SIZE(keyboard_lang_data); i++) {
10684 		if (i)
10685 			len += sysfs_emit_at(buf, len, "%s", " ");
10686 
10687 		if (output == keyboard_lang_data[i].lang_code) {
10688 			len += sysfs_emit_at(buf, len, "[%s]", keyboard_lang_data[i].lang_str);
10689 		} else {
10690 			len += sysfs_emit_at(buf, len, "%s", keyboard_lang_data[i].lang_str);
10691 		}
10692 	}
10693 	len += sysfs_emit_at(buf, len, "\n");
10694 
10695 	return len;
10696 }
10697 
10698 static ssize_t keyboard_lang_store(struct device *dev,
10699 				struct device_attribute *attr,
10700 				const char *buf, size_t count)
10701 {
10702 	int err, i;
10703 	bool lang_found = false;
10704 	int lang_code = 0;
10705 
10706 	for (i = 0; i < ARRAY_SIZE(keyboard_lang_data); i++) {
10707 		if (sysfs_streq(buf, keyboard_lang_data[i].lang_str)) {
10708 			lang_code = keyboard_lang_data[i].lang_code;
10709 			lang_found = true;
10710 			break;
10711 		}
10712 	}
10713 
10714 	if (lang_found) {
10715 		lang_code = lang_code | 1 << 24;
10716 
10717 		/* Set language code */
10718 		err = set_keyboard_lang_command(lang_code);
10719 		if (err)
10720 			return err;
10721 	} else {
10722 		dev_err(&tpacpi_pdev->dev, "Unknown Keyboard language. Ignoring\n");
10723 		return -EINVAL;
10724 	}
10725 
10726 	tpacpi_disclose_usertask(attr->attr.name,
10727 			"keyboard language is set to  %s\n", buf);
10728 
10729 	sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, "keyboard_lang");
10730 
10731 	return count;
10732 }
10733 static DEVICE_ATTR_RW(keyboard_lang);
10734 
10735 static struct attribute *kbdlang_attributes[] = {
10736 	&dev_attr_keyboard_lang.attr,
10737 	NULL
10738 };
10739 
10740 static umode_t kbdlang_attr_is_visible(struct kobject *kobj,
10741 				       struct attribute *attr, int n)
10742 {
10743 	return tp_features.kbd_lang ? attr->mode : 0;
10744 }
10745 
10746 static const struct attribute_group kbdlang_attr_group = {
10747 	.is_visible = kbdlang_attr_is_visible,
10748 	.attrs = kbdlang_attributes,
10749 };
10750 
10751 static int tpacpi_kbdlang_init(struct ibm_init_struct *iibm)
10752 {
10753 	int err, output;
10754 
10755 	err = get_keyboard_lang(&output);
10756 	tp_features.kbd_lang = !err;
10757 	return err;
10758 }
10759 
10760 static struct ibm_struct kbdlang_driver_data = {
10761 	.name = "kbdlang",
10762 };
10763 
10764 /*************************************************************************
10765  * DPRC(Dynamic Power Reduction Control) subdriver, for the Lenovo WWAN
10766  * and WLAN feature.
10767  */
10768 #define DPRC_GET_WWAN_ANTENNA_TYPE      0x40000
10769 #define DPRC_WWAN_ANTENNA_TYPE_A_BIT    BIT(4)
10770 #define DPRC_WWAN_ANTENNA_TYPE_B_BIT    BIT(8)
10771 static bool has_antennatype;
10772 static int wwan_antennatype;
10773 
10774 static int dprc_command(int command, int *output)
10775 {
10776 	acpi_handle dprc_handle;
10777 
10778 	if (ACPI_FAILURE(acpi_get_handle(hkey_handle, "DPRC", &dprc_handle))) {
10779 		/* Platform doesn't support DPRC */
10780 		return -ENODEV;
10781 	}
10782 
10783 	if (!acpi_evalf(dprc_handle, output, NULL, "dd", command))
10784 		return -EIO;
10785 
10786 	/*
10787 	 * METHOD_ERR gets returned on devices where few commands are not supported
10788 	 * for example command to get WWAN Antenna type command is not supported on
10789 	 * some devices.
10790 	 */
10791 	if (*output & METHOD_ERR)
10792 		return -ENODEV;
10793 
10794 	return 0;
10795 }
10796 
10797 static int get_wwan_antenna(int *wwan_antennatype)
10798 {
10799 	int output, err;
10800 
10801 	/* Get current Antenna type */
10802 	err = dprc_command(DPRC_GET_WWAN_ANTENNA_TYPE, &output);
10803 	if (err)
10804 		return err;
10805 
10806 	if (output & DPRC_WWAN_ANTENNA_TYPE_A_BIT)
10807 		*wwan_antennatype = 1;
10808 	else if (output & DPRC_WWAN_ANTENNA_TYPE_B_BIT)
10809 		*wwan_antennatype = 2;
10810 	else
10811 		return -ENODEV;
10812 
10813 	return 0;
10814 }
10815 
10816 /* sysfs wwan antenna type entry */
10817 static ssize_t wwan_antenna_type_show(struct device *dev,
10818 					struct device_attribute *attr,
10819 					char *buf)
10820 {
10821 	switch (wwan_antennatype) {
10822 	case 1:
10823 		return sysfs_emit(buf, "type a\n");
10824 	case 2:
10825 		return sysfs_emit(buf, "type b\n");
10826 	default:
10827 		return -ENODATA;
10828 	}
10829 }
10830 static DEVICE_ATTR_RO(wwan_antenna_type);
10831 
10832 static struct attribute *dprc_attributes[] = {
10833 	&dev_attr_wwan_antenna_type.attr,
10834 	NULL
10835 };
10836 
10837 static umode_t dprc_attr_is_visible(struct kobject *kobj,
10838 				    struct attribute *attr, int n)
10839 {
10840 	return has_antennatype ? attr->mode : 0;
10841 }
10842 
10843 static const struct attribute_group dprc_attr_group = {
10844 	.is_visible = dprc_attr_is_visible,
10845 	.attrs = dprc_attributes,
10846 };
10847 
10848 static int tpacpi_dprc_init(struct ibm_init_struct *iibm)
10849 {
10850 	int err;
10851 
10852 	err = get_wwan_antenna(&wwan_antennatype);
10853 	if (err)
10854 		return err;
10855 
10856 	has_antennatype = true;
10857 	return 0;
10858 }
10859 
10860 static struct ibm_struct dprc_driver_data = {
10861 	.name = "dprc",
10862 };
10863 
10864 /* --------------------------------------------------------------------- */
10865 
10866 static struct attribute *tpacpi_driver_attributes[] = {
10867 	&driver_attr_debug_level.attr,
10868 	&driver_attr_version.attr,
10869 	&driver_attr_interface_version.attr,
10870 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
10871 	&driver_attr_wlsw_emulstate.attr,
10872 	&driver_attr_bluetooth_emulstate.attr,
10873 	&driver_attr_wwan_emulstate.attr,
10874 	&driver_attr_uwb_emulstate.attr,
10875 #endif
10876 	NULL
10877 };
10878 
10879 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
10880 static umode_t tpacpi_attr_is_visible(struct kobject *kobj,
10881 				      struct attribute *attr, int n)
10882 {
10883 	if (attr == &driver_attr_wlsw_emulstate.attr) {
10884 		if (!dbg_wlswemul)
10885 			return 0;
10886 	} else if (attr == &driver_attr_bluetooth_emulstate.attr) {
10887 		if (!dbg_bluetoothemul)
10888 			return 0;
10889 	} else if (attr == &driver_attr_wwan_emulstate.attr) {
10890 		if (!dbg_wwanemul)
10891 			return 0;
10892 	} else if (attr == &driver_attr_uwb_emulstate.attr) {
10893 		if (!dbg_uwbemul)
10894 			return 0;
10895 	}
10896 
10897 	return attr->mode;
10898 }
10899 #endif
10900 
10901 static const struct attribute_group tpacpi_driver_attr_group = {
10902 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
10903 	.is_visible = tpacpi_attr_is_visible,
10904 #endif
10905 	.attrs = tpacpi_driver_attributes,
10906 };
10907 
10908 static const struct attribute_group *tpacpi_driver_groups[] = {
10909 	&tpacpi_driver_attr_group,
10910 	NULL,
10911 };
10912 
10913 static const struct attribute_group *tpacpi_groups[] = {
10914 	&adaptive_kbd_attr_group,
10915 	&hotkey_attr_group,
10916 	&bluetooth_attr_group,
10917 	&wan_attr_group,
10918 	&cmos_attr_group,
10919 	&proxsensor_attr_group,
10920 	&kbdlang_attr_group,
10921 	&dprc_attr_group,
10922 	NULL,
10923 };
10924 
10925 static const struct attribute_group *tpacpi_hwmon_groups[] = {
10926 	&thermal_attr_group,
10927 	&temp_label_attr_group,
10928 	&fan_attr_group,
10929 	NULL,
10930 };
10931 
10932 static const struct attribute_group *tpacpi_hwmon_driver_groups[] = {
10933 	&fan_driver_attr_group,
10934 	NULL,
10935 };
10936 
10937 /****************************************************************************
10938  ****************************************************************************
10939  *
10940  * Platform drivers
10941  *
10942  ****************************************************************************
10943  ****************************************************************************/
10944 
10945 static struct platform_driver tpacpi_pdriver = {
10946 	.driver = {
10947 		.name = TPACPI_DRVR_NAME,
10948 		.pm = &tpacpi_pm,
10949 		.groups = tpacpi_driver_groups,
10950 		.dev_groups = tpacpi_groups,
10951 	},
10952 	.shutdown = tpacpi_shutdown_handler,
10953 };
10954 
10955 static struct platform_driver tpacpi_hwmon_pdriver = {
10956 	.driver = {
10957 		.name = TPACPI_HWMON_DRVR_NAME,
10958 		.groups = tpacpi_hwmon_driver_groups,
10959 	},
10960 };
10961 
10962 /****************************************************************************
10963  ****************************************************************************
10964  *
10965  * Infrastructure
10966  *
10967  ****************************************************************************
10968  ****************************************************************************/
10969 
10970 /*
10971  * HKEY event callout for other subdrivers go here
10972  * (yes, it is ugly, but it is quick, safe, and gets the job done
10973  */
10974 static void tpacpi_driver_event(const unsigned int hkey_event)
10975 {
10976 	if (ibm_backlight_device) {
10977 		switch (hkey_event) {
10978 		case TP_HKEY_EV_BRGHT_UP:
10979 		case TP_HKEY_EV_BRGHT_DOWN:
10980 			tpacpi_brightness_notify_change();
10981 		}
10982 	}
10983 	if (alsa_card) {
10984 		switch (hkey_event) {
10985 		case TP_HKEY_EV_VOL_UP:
10986 		case TP_HKEY_EV_VOL_DOWN:
10987 		case TP_HKEY_EV_VOL_MUTE:
10988 			volume_alsa_notify_change();
10989 		}
10990 	}
10991 	if (tp_features.kbdlight && hkey_event == TP_HKEY_EV_KBD_LIGHT) {
10992 		enum led_brightness brightness;
10993 
10994 		mutex_lock(&kbdlight_mutex);
10995 
10996 		/*
10997 		 * Check the brightness actually changed, setting the brightness
10998 		 * through kbdlight_set_level() also triggers this event.
10999 		 */
11000 		brightness = kbdlight_sysfs_get(NULL);
11001 		if (kbdlight_brightness != brightness) {
11002 			kbdlight_brightness = brightness;
11003 			led_classdev_notify_brightness_hw_changed(
11004 				&tpacpi_led_kbdlight.led_classdev, brightness);
11005 		}
11006 
11007 		mutex_unlock(&kbdlight_mutex);
11008 	}
11009 
11010 	if (hkey_event == TP_HKEY_EV_THM_CSM_COMPLETED) {
11011 		lapsensor_refresh();
11012 		/* If we are already accessing DYTC then skip dytc update */
11013 		if (!atomic_add_unless(&dytc_ignore_event, -1, 0))
11014 			dytc_profile_refresh();
11015 	}
11016 
11017 	if (lcdshadow_dev && hkey_event == TP_HKEY_EV_PRIVACYGUARD_TOGGLE) {
11018 		enum drm_privacy_screen_status old_hw_state;
11019 		bool changed;
11020 
11021 		mutex_lock(&lcdshadow_dev->lock);
11022 		old_hw_state = lcdshadow_dev->hw_state;
11023 		lcdshadow_get_hw_state(lcdshadow_dev);
11024 		changed = lcdshadow_dev->hw_state != old_hw_state;
11025 		mutex_unlock(&lcdshadow_dev->lock);
11026 
11027 		if (changed)
11028 			drm_privacy_screen_call_notifier_chain(lcdshadow_dev);
11029 	}
11030 	if (hkey_event == TP_HKEY_EV_AMT_TOGGLE) {
11031 		/* If we're enabling AMT we need to force balanced mode */
11032 		if (!dytc_amt_active)
11033 			/* This will also set AMT mode enabled */
11034 			dytc_profile_set(NULL, PLATFORM_PROFILE_BALANCED);
11035 		else
11036 			dytc_control_amt(!dytc_amt_active);
11037 	}
11038 
11039 }
11040 
11041 static void hotkey_driver_event(const unsigned int scancode)
11042 {
11043 	tpacpi_driver_event(TP_HKEY_EV_HOTKEY_BASE + scancode);
11044 }
11045 
11046 /* --------------------------------------------------------------------- */
11047 
11048 /* /proc support */
11049 static struct proc_dir_entry *proc_dir;
11050 
11051 /*
11052  * Module and infrastructure proble, init and exit handling
11053  */
11054 
11055 static bool force_load;
11056 
11057 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
11058 static const char * __init str_supported(int is_supported)
11059 {
11060 	static char text_unsupported[] __initdata = "not supported";
11061 
11062 	return (is_supported) ? &text_unsupported[4] : &text_unsupported[0];
11063 }
11064 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
11065 
11066 static void ibm_exit(struct ibm_struct *ibm)
11067 {
11068 	dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
11069 
11070 	list_del_init(&ibm->all_drivers);
11071 
11072 	if (ibm->flags.acpi_notify_installed) {
11073 		dbg_printk(TPACPI_DBG_EXIT,
11074 			"%s: acpi_remove_notify_handler\n", ibm->name);
11075 		BUG_ON(!ibm->acpi);
11076 		acpi_remove_notify_handler(*ibm->acpi->handle,
11077 					   ibm->acpi->type,
11078 					   dispatch_acpi_notify);
11079 		ibm->flags.acpi_notify_installed = 0;
11080 	}
11081 
11082 	if (ibm->flags.proc_created) {
11083 		dbg_printk(TPACPI_DBG_EXIT,
11084 			"%s: remove_proc_entry\n", ibm->name);
11085 		remove_proc_entry(ibm->name, proc_dir);
11086 		ibm->flags.proc_created = 0;
11087 	}
11088 
11089 	if (ibm->flags.acpi_driver_registered) {
11090 		dbg_printk(TPACPI_DBG_EXIT,
11091 			"%s: acpi_bus_unregister_driver\n", ibm->name);
11092 		BUG_ON(!ibm->acpi);
11093 		acpi_bus_unregister_driver(ibm->acpi->driver);
11094 		kfree(ibm->acpi->driver);
11095 		ibm->acpi->driver = NULL;
11096 		ibm->flags.acpi_driver_registered = 0;
11097 	}
11098 
11099 	if (ibm->flags.init_called && ibm->exit) {
11100 		ibm->exit();
11101 		ibm->flags.init_called = 0;
11102 	}
11103 
11104 	dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
11105 }
11106 
11107 static int __init ibm_init(struct ibm_init_struct *iibm)
11108 {
11109 	int ret;
11110 	struct ibm_struct *ibm = iibm->data;
11111 	struct proc_dir_entry *entry;
11112 
11113 	BUG_ON(ibm == NULL);
11114 
11115 	INIT_LIST_HEAD(&ibm->all_drivers);
11116 
11117 	if (ibm->flags.experimental && !experimental)
11118 		return 0;
11119 
11120 	dbg_printk(TPACPI_DBG_INIT,
11121 		"probing for %s\n", ibm->name);
11122 
11123 	if (iibm->init) {
11124 		ret = iibm->init(iibm);
11125 		if (ret > 0 || ret == -ENODEV)
11126 			return 0; /* subdriver functionality not available */
11127 		if (ret)
11128 			return ret;
11129 
11130 		ibm->flags.init_called = 1;
11131 	}
11132 
11133 	if (ibm->acpi) {
11134 		if (ibm->acpi->hid) {
11135 			ret = register_tpacpi_subdriver(ibm);
11136 			if (ret)
11137 				goto err_out;
11138 		}
11139 
11140 		if (ibm->acpi->notify) {
11141 			ret = setup_acpi_notify(ibm);
11142 			if (ret == -ENODEV) {
11143 				pr_notice("disabling subdriver %s\n",
11144 					  ibm->name);
11145 				ret = 0;
11146 				goto err_out;
11147 			}
11148 			if (ret < 0)
11149 				goto err_out;
11150 		}
11151 	}
11152 
11153 	dbg_printk(TPACPI_DBG_INIT,
11154 		"%s installed\n", ibm->name);
11155 
11156 	if (ibm->read) {
11157 		umode_t mode = iibm->base_procfs_mode;
11158 
11159 		if (!mode)
11160 			mode = S_IRUGO;
11161 		if (ibm->write)
11162 			mode |= S_IWUSR;
11163 		entry = proc_create_data(ibm->name, mode, proc_dir,
11164 					 &dispatch_proc_ops, ibm);
11165 		if (!entry) {
11166 			pr_err("unable to create proc entry %s\n", ibm->name);
11167 			ret = -ENODEV;
11168 			goto err_out;
11169 		}
11170 		ibm->flags.proc_created = 1;
11171 	}
11172 
11173 	list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
11174 
11175 	return 0;
11176 
11177 err_out:
11178 	dbg_printk(TPACPI_DBG_INIT,
11179 		"%s: at error exit path with result %d\n",
11180 		ibm->name, ret);
11181 
11182 	ibm_exit(ibm);
11183 	return (ret < 0) ? ret : 0;
11184 }
11185 
11186 /* Probing */
11187 
11188 static char __init tpacpi_parse_fw_id(const char * const s,
11189 				      u32 *model, u16 *release)
11190 {
11191 	int i;
11192 
11193 	if (!s || strlen(s) < 8)
11194 		goto invalid;
11195 
11196 	for (i = 0; i < 8; i++)
11197 		if (!((s[i] >= '0' && s[i] <= '9') ||
11198 		      (s[i] >= 'A' && s[i] <= 'Z')))
11199 			goto invalid;
11200 
11201 	/*
11202 	 * Most models: xxyTkkWW (#.##c)
11203 	 * Ancient 570/600 and -SL lacks (#.##c)
11204 	 */
11205 	if (s[3] == 'T' || s[3] == 'N') {
11206 		*model = TPID(s[0], s[1]);
11207 		*release = TPVER(s[4], s[5]);
11208 		return s[2];
11209 
11210 	/* New models: xxxyTkkW (#.##c); T550 and some others */
11211 	} else if (s[4] == 'T' || s[4] == 'N') {
11212 		*model = TPID3(s[0], s[1], s[2]);
11213 		*release = TPVER(s[5], s[6]);
11214 		return s[3];
11215 	}
11216 
11217 invalid:
11218 	return '\0';
11219 }
11220 
11221 static void find_new_ec_fwstr(const struct dmi_header *dm, void *private)
11222 {
11223 	char *ec_fw_string = (char *) private;
11224 	const char *dmi_data = (const char *)dm;
11225 	/*
11226 	 * ThinkPad Embedded Controller Program Table on newer models
11227 	 *
11228 	 * Offset |  Name                | Width  | Description
11229 	 * ----------------------------------------------------
11230 	 *  0x00  | Type                 | BYTE   | 0x8C
11231 	 *  0x01  | Length               | BYTE   |
11232 	 *  0x02  | Handle               | WORD   | Varies
11233 	 *  0x04  | Signature            | BYTEx6 | ASCII for "LENOVO"
11234 	 *  0x0A  | OEM struct offset    | BYTE   | 0x0B
11235 	 *  0x0B  | OEM struct number    | BYTE   | 0x07, for this structure
11236 	 *  0x0C  | OEM struct revision  | BYTE   | 0x01, for this format
11237 	 *  0x0D  | ECP version ID       | STR ID |
11238 	 *  0x0E  | ECP release date     | STR ID |
11239 	 */
11240 
11241 	/* Return if data structure not match */
11242 	if (dm->type != 140 || dm->length < 0x0F ||
11243 	memcmp(dmi_data + 4, "LENOVO", 6) != 0 ||
11244 	dmi_data[0x0A] != 0x0B || dmi_data[0x0B] != 0x07 ||
11245 	dmi_data[0x0C] != 0x01)
11246 		return;
11247 
11248 	/* fwstr is the first 8byte string  */
11249 	strncpy(ec_fw_string, dmi_data + 0x0F, 8);
11250 }
11251 
11252 /* returns 0 - probe ok, or < 0 - probe error.
11253  * Probe ok doesn't mean thinkpad found.
11254  * On error, kfree() cleanup on tp->* is not performed, caller must do it */
11255 static int __must_check __init get_thinkpad_model_data(
11256 						struct thinkpad_id_data *tp)
11257 {
11258 	const struct dmi_device *dev = NULL;
11259 	char ec_fw_string[18] = {0};
11260 	char const *s;
11261 	char t;
11262 
11263 	if (!tp)
11264 		return -EINVAL;
11265 
11266 	memset(tp, 0, sizeof(*tp));
11267 
11268 	if (dmi_name_in_vendors("IBM"))
11269 		tp->vendor = PCI_VENDOR_ID_IBM;
11270 	else if (dmi_name_in_vendors("LENOVO"))
11271 		tp->vendor = PCI_VENDOR_ID_LENOVO;
11272 	else
11273 		return 0;
11274 
11275 	s = dmi_get_system_info(DMI_BIOS_VERSION);
11276 	tp->bios_version_str = kstrdup(s, GFP_KERNEL);
11277 	if (s && !tp->bios_version_str)
11278 		return -ENOMEM;
11279 
11280 	/* Really ancient ThinkPad 240X will fail this, which is fine */
11281 	t = tpacpi_parse_fw_id(tp->bios_version_str,
11282 			       &tp->bios_model, &tp->bios_release);
11283 	if (t != 'E' && t != 'C')
11284 		return 0;
11285 
11286 	/*
11287 	 * ThinkPad T23 or newer, A31 or newer, R50e or newer,
11288 	 * X32 or newer, all Z series;  Some models must have an
11289 	 * up-to-date BIOS or they will not be detected.
11290 	 *
11291 	 * See https://thinkwiki.org/wiki/List_of_DMI_IDs
11292 	 */
11293 	while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
11294 		if (sscanf(dev->name,
11295 			   "IBM ThinkPad Embedded Controller -[%17c",
11296 			   ec_fw_string) == 1) {
11297 			ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
11298 			ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
11299 			break;
11300 		}
11301 	}
11302 
11303 	/* Newer ThinkPads have different EC program info table */
11304 	if (!ec_fw_string[0])
11305 		dmi_walk(find_new_ec_fwstr, &ec_fw_string);
11306 
11307 	if (ec_fw_string[0]) {
11308 		tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL);
11309 		if (!tp->ec_version_str)
11310 			return -ENOMEM;
11311 
11312 		t = tpacpi_parse_fw_id(ec_fw_string,
11313 			 &tp->ec_model, &tp->ec_release);
11314 		if (t != 'H') {
11315 			pr_notice("ThinkPad firmware release %s doesn't match the known patterns\n",
11316 				  ec_fw_string);
11317 			pr_notice("please report this to %s\n", TPACPI_MAIL);
11318 		}
11319 	}
11320 
11321 	s = dmi_get_system_info(DMI_PRODUCT_VERSION);
11322 	if (s && !(strncasecmp(s, "ThinkPad", 8) && strncasecmp(s, "Lenovo", 6))) {
11323 		tp->model_str = kstrdup(s, GFP_KERNEL);
11324 		if (!tp->model_str)
11325 			return -ENOMEM;
11326 	} else {
11327 		s = dmi_get_system_info(DMI_BIOS_VENDOR);
11328 		if (s && !(strncasecmp(s, "Lenovo", 6))) {
11329 			tp->model_str = kstrdup(s, GFP_KERNEL);
11330 			if (!tp->model_str)
11331 				return -ENOMEM;
11332 		}
11333 	}
11334 
11335 	s = dmi_get_system_info(DMI_PRODUCT_NAME);
11336 	tp->nummodel_str = kstrdup(s, GFP_KERNEL);
11337 	if (s && !tp->nummodel_str)
11338 		return -ENOMEM;
11339 
11340 	return 0;
11341 }
11342 
11343 static int __init probe_for_thinkpad(void)
11344 {
11345 	int is_thinkpad;
11346 
11347 	if (acpi_disabled)
11348 		return -ENODEV;
11349 
11350 	/* It would be dangerous to run the driver in this case */
11351 	if (!tpacpi_is_ibm() && !tpacpi_is_lenovo())
11352 		return -ENODEV;
11353 
11354 	/*
11355 	 * Non-ancient models have better DMI tagging, but very old models
11356 	 * don't.  tpacpi_is_fw_known() is a cheat to help in that case.
11357 	 */
11358 	is_thinkpad = (thinkpad_id.model_str != NULL) ||
11359 		      (thinkpad_id.ec_model != 0) ||
11360 		      tpacpi_is_fw_known();
11361 
11362 	/* The EC handler is required */
11363 	tpacpi_acpi_handle_locate("ec", TPACPI_ACPI_EC_HID, &ec_handle);
11364 	if (!ec_handle) {
11365 		if (is_thinkpad)
11366 			pr_err("Not yet supported ThinkPad detected!\n");
11367 		return -ENODEV;
11368 	}
11369 
11370 	if (!is_thinkpad && !force_load)
11371 		return -ENODEV;
11372 
11373 	return 0;
11374 }
11375 
11376 static void __init thinkpad_acpi_init_banner(void)
11377 {
11378 	pr_info("%s v%s\n", TPACPI_DESC, TPACPI_VERSION);
11379 	pr_info("%s\n", TPACPI_URL);
11380 
11381 	pr_info("ThinkPad BIOS %s, EC %s\n",
11382 		(thinkpad_id.bios_version_str) ?
11383 			thinkpad_id.bios_version_str : "unknown",
11384 		(thinkpad_id.ec_version_str) ?
11385 			thinkpad_id.ec_version_str : "unknown");
11386 
11387 	BUG_ON(!thinkpad_id.vendor);
11388 
11389 	if (thinkpad_id.model_str)
11390 		pr_info("%s %s, model %s\n",
11391 			(thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
11392 				"IBM" : ((thinkpad_id.vendor ==
11393 						PCI_VENDOR_ID_LENOVO) ?
11394 					"Lenovo" : "Unknown vendor"),
11395 			thinkpad_id.model_str,
11396 			(thinkpad_id.nummodel_str) ?
11397 				thinkpad_id.nummodel_str : "unknown");
11398 }
11399 
11400 /* Module init, exit, parameters */
11401 
11402 static struct ibm_init_struct ibms_init[] __initdata = {
11403 	{
11404 		.data = &thinkpad_acpi_driver_data,
11405 	},
11406 	{
11407 		.init = hotkey_init,
11408 		.data = &hotkey_driver_data,
11409 	},
11410 	{
11411 		.init = bluetooth_init,
11412 		.data = &bluetooth_driver_data,
11413 	},
11414 	{
11415 		.init = wan_init,
11416 		.data = &wan_driver_data,
11417 	},
11418 	{
11419 		.init = uwb_init,
11420 		.data = &uwb_driver_data,
11421 	},
11422 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
11423 	{
11424 		.init = video_init,
11425 		.base_procfs_mode = S_IRUSR,
11426 		.data = &video_driver_data,
11427 	},
11428 #endif
11429 	{
11430 		.init = kbdlight_init,
11431 		.data = &kbdlight_driver_data,
11432 	},
11433 	{
11434 		.init = light_init,
11435 		.data = &light_driver_data,
11436 	},
11437 	{
11438 		.init = cmos_init,
11439 		.data = &cmos_driver_data,
11440 	},
11441 	{
11442 		.init = led_init,
11443 		.data = &led_driver_data,
11444 	},
11445 	{
11446 		.init = beep_init,
11447 		.data = &beep_driver_data,
11448 	},
11449 	{
11450 		.init = thermal_init,
11451 		.data = &thermal_driver_data,
11452 	},
11453 	{
11454 		.init = brightness_init,
11455 		.data = &brightness_driver_data,
11456 	},
11457 	{
11458 		.init = volume_init,
11459 		.data = &volume_driver_data,
11460 	},
11461 	{
11462 		.init = fan_init,
11463 		.data = &fan_driver_data,
11464 	},
11465 	{
11466 		.init = mute_led_init,
11467 		.data = &mute_led_driver_data,
11468 	},
11469 	{
11470 		.init = tpacpi_battery_init,
11471 		.data = &battery_driver_data,
11472 	},
11473 	{
11474 		.init = tpacpi_lcdshadow_init,
11475 		.data = &lcdshadow_driver_data,
11476 	},
11477 	{
11478 		.init = tpacpi_proxsensor_init,
11479 		.data = &proxsensor_driver_data,
11480 	},
11481 	{
11482 		.init = tpacpi_dytc_profile_init,
11483 		.data = &dytc_profile_driver_data,
11484 	},
11485 	{
11486 		.init = tpacpi_kbdlang_init,
11487 		.data = &kbdlang_driver_data,
11488 	},
11489 	{
11490 		.init = tpacpi_dprc_init,
11491 		.data = &dprc_driver_data,
11492 	},
11493 };
11494 
11495 static int __init set_ibm_param(const char *val, const struct kernel_param *kp)
11496 {
11497 	unsigned int i;
11498 	struct ibm_struct *ibm;
11499 
11500 	if (!kp || !kp->name || !val)
11501 		return -EINVAL;
11502 
11503 	for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
11504 		ibm = ibms_init[i].data;
11505 		if (!ibm || !ibm->name)
11506 			continue;
11507 
11508 		if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
11509 			if (strlen(val) > sizeof(ibms_init[i].param) - 1)
11510 				return -ENOSPC;
11511 			strcpy(ibms_init[i].param, val);
11512 			return 0;
11513 		}
11514 	}
11515 
11516 	return -EINVAL;
11517 }
11518 
11519 module_param(experimental, int, 0444);
11520 MODULE_PARM_DESC(experimental,
11521 		 "Enables experimental features when non-zero");
11522 
11523 module_param_named(debug, dbg_level, uint, 0);
11524 MODULE_PARM_DESC(debug, "Sets debug level bit-mask");
11525 
11526 module_param(force_load, bool, 0444);
11527 MODULE_PARM_DESC(force_load,
11528 		 "Attempts to load the driver even on a mis-identified ThinkPad when true");
11529 
11530 module_param_named(fan_control, fan_control_allowed, bool, 0444);
11531 MODULE_PARM_DESC(fan_control,
11532 		 "Enables setting fan parameters features when true");
11533 
11534 module_param_named(brightness_mode, brightness_mode, uint, 0444);
11535 MODULE_PARM_DESC(brightness_mode,
11536 		 "Selects brightness control strategy: 0=auto, 1=EC, 2=UCMS, 3=EC+NVRAM");
11537 
11538 module_param(brightness_enable, uint, 0444);
11539 MODULE_PARM_DESC(brightness_enable,
11540 		 "Enables backlight control when 1, disables when 0");
11541 
11542 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT
11543 module_param_named(volume_mode, volume_mode, uint, 0444);
11544 MODULE_PARM_DESC(volume_mode,
11545 		 "Selects volume control strategy: 0=auto, 1=EC, 2=N/A, 3=EC+NVRAM");
11546 
11547 module_param_named(volume_capabilities, volume_capabilities, uint, 0444);
11548 MODULE_PARM_DESC(volume_capabilities,
11549 		 "Selects the mixer capabilities: 0=auto, 1=volume and mute, 2=mute only");
11550 
11551 module_param_named(volume_control, volume_control_allowed, bool, 0444);
11552 MODULE_PARM_DESC(volume_control,
11553 		 "Enables software override for the console audio control when true");
11554 
11555 module_param_named(software_mute, software_mute_requested, bool, 0444);
11556 MODULE_PARM_DESC(software_mute,
11557 		 "Request full software mute control");
11558 
11559 /* ALSA module API parameters */
11560 module_param_named(index, alsa_index, int, 0444);
11561 MODULE_PARM_DESC(index, "ALSA index for the ACPI EC Mixer");
11562 module_param_named(id, alsa_id, charp, 0444);
11563 MODULE_PARM_DESC(id, "ALSA id for the ACPI EC Mixer");
11564 module_param_named(enable, alsa_enable, bool, 0444);
11565 MODULE_PARM_DESC(enable, "Enable the ALSA interface for the ACPI EC Mixer");
11566 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */
11567 
11568 /* The module parameter can't be read back, that's why 0 is used here */
11569 #define TPACPI_PARAM(feature) \
11570 	module_param_call(feature, set_ibm_param, NULL, NULL, 0); \
11571 	MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command at module load, see documentation")
11572 
11573 TPACPI_PARAM(hotkey);
11574 TPACPI_PARAM(bluetooth);
11575 TPACPI_PARAM(video);
11576 TPACPI_PARAM(light);
11577 TPACPI_PARAM(cmos);
11578 TPACPI_PARAM(led);
11579 TPACPI_PARAM(beep);
11580 TPACPI_PARAM(brightness);
11581 TPACPI_PARAM(volume);
11582 TPACPI_PARAM(fan);
11583 
11584 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
11585 module_param(dbg_wlswemul, uint, 0444);
11586 MODULE_PARM_DESC(dbg_wlswemul, "Enables WLSW emulation");
11587 module_param_named(wlsw_state, tpacpi_wlsw_emulstate, bool, 0);
11588 MODULE_PARM_DESC(wlsw_state,
11589 		 "Initial state of the emulated WLSW switch");
11590 
11591 module_param(dbg_bluetoothemul, uint, 0444);
11592 MODULE_PARM_DESC(dbg_bluetoothemul, "Enables bluetooth switch emulation");
11593 module_param_named(bluetooth_state, tpacpi_bluetooth_emulstate, bool, 0);
11594 MODULE_PARM_DESC(bluetooth_state,
11595 		 "Initial state of the emulated bluetooth switch");
11596 
11597 module_param(dbg_wwanemul, uint, 0444);
11598 MODULE_PARM_DESC(dbg_wwanemul, "Enables WWAN switch emulation");
11599 module_param_named(wwan_state, tpacpi_wwan_emulstate, bool, 0);
11600 MODULE_PARM_DESC(wwan_state,
11601 		 "Initial state of the emulated WWAN switch");
11602 
11603 module_param(dbg_uwbemul, uint, 0444);
11604 MODULE_PARM_DESC(dbg_uwbemul, "Enables UWB switch emulation");
11605 module_param_named(uwb_state, tpacpi_uwb_emulstate, bool, 0);
11606 MODULE_PARM_DESC(uwb_state,
11607 		 "Initial state of the emulated UWB switch");
11608 #endif
11609 
11610 module_param(profile_force, int, 0444);
11611 MODULE_PARM_DESC(profile_force, "Force profile mode. -1=off, 1=MMC, 2=PSC");
11612 
11613 static void thinkpad_acpi_module_exit(void)
11614 {
11615 	struct ibm_struct *ibm, *itmp;
11616 
11617 	tpacpi_lifecycle = TPACPI_LIFE_EXITING;
11618 
11619 	if (tpacpi_hwmon)
11620 		hwmon_device_unregister(tpacpi_hwmon);
11621 	if (tp_features.sensors_pdrv_registered)
11622 		platform_driver_unregister(&tpacpi_hwmon_pdriver);
11623 	if (tp_features.platform_drv_registered)
11624 		platform_driver_unregister(&tpacpi_pdriver);
11625 
11626 	list_for_each_entry_safe_reverse(ibm, itmp,
11627 					 &tpacpi_all_drivers,
11628 					 all_drivers) {
11629 		ibm_exit(ibm);
11630 	}
11631 
11632 	dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
11633 
11634 	if (tpacpi_inputdev) {
11635 		if (tp_features.input_device_registered)
11636 			input_unregister_device(tpacpi_inputdev);
11637 		else
11638 			input_free_device(tpacpi_inputdev);
11639 		kfree(hotkey_keycode_map);
11640 	}
11641 
11642 	if (tpacpi_sensors_pdev)
11643 		platform_device_unregister(tpacpi_sensors_pdev);
11644 	if (tpacpi_pdev)
11645 		platform_device_unregister(tpacpi_pdev);
11646 	if (proc_dir)
11647 		remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir);
11648 	if (tpacpi_wq)
11649 		destroy_workqueue(tpacpi_wq);
11650 
11651 	kfree(thinkpad_id.bios_version_str);
11652 	kfree(thinkpad_id.ec_version_str);
11653 	kfree(thinkpad_id.model_str);
11654 	kfree(thinkpad_id.nummodel_str);
11655 }
11656 
11657 
11658 static int __init thinkpad_acpi_module_init(void)
11659 {
11660 	const struct dmi_system_id *dmi_id;
11661 	int ret, i;
11662 	acpi_object_type obj_type;
11663 
11664 	tpacpi_lifecycle = TPACPI_LIFE_INIT;
11665 
11666 	/* Driver-level probe */
11667 
11668 	ret = get_thinkpad_model_data(&thinkpad_id);
11669 	if (ret) {
11670 		pr_err("unable to get DMI data: %d\n", ret);
11671 		thinkpad_acpi_module_exit();
11672 		return ret;
11673 	}
11674 	ret = probe_for_thinkpad();
11675 	if (ret) {
11676 		thinkpad_acpi_module_exit();
11677 		return ret;
11678 	}
11679 
11680 	/* Driver initialization */
11681 
11682 	thinkpad_acpi_init_banner();
11683 	tpacpi_check_outdated_fw();
11684 
11685 	TPACPI_ACPIHANDLE_INIT(ecrd);
11686 	TPACPI_ACPIHANDLE_INIT(ecwr);
11687 
11688 	/*
11689 	 * Quirk: in some models (e.g. X380 Yoga), an object named ECRD
11690 	 * exists, but it is a register, not a method.
11691 	 */
11692 	if (ecrd_handle) {
11693 		acpi_get_type(ecrd_handle, &obj_type);
11694 		if (obj_type != ACPI_TYPE_METHOD)
11695 			ecrd_handle = NULL;
11696 	}
11697 	if (ecwr_handle) {
11698 		acpi_get_type(ecwr_handle, &obj_type);
11699 		if (obj_type != ACPI_TYPE_METHOD)
11700 			ecwr_handle = NULL;
11701 	}
11702 
11703 	tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME);
11704 	if (!tpacpi_wq) {
11705 		thinkpad_acpi_module_exit();
11706 		return -ENOMEM;
11707 	}
11708 
11709 	proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir);
11710 	if (!proc_dir) {
11711 		pr_err("unable to create proc dir " TPACPI_PROC_DIR "\n");
11712 		thinkpad_acpi_module_exit();
11713 		return -ENODEV;
11714 	}
11715 
11716 	dmi_id = dmi_first_match(fwbug_list);
11717 	if (dmi_id)
11718 		tp_features.quirks = dmi_id->driver_data;
11719 
11720 	/* Device initialization */
11721 	tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, PLATFORM_DEVID_NONE,
11722 							NULL, 0);
11723 	if (IS_ERR(tpacpi_pdev)) {
11724 		ret = PTR_ERR(tpacpi_pdev);
11725 		tpacpi_pdev = NULL;
11726 		pr_err("unable to register platform device\n");
11727 		thinkpad_acpi_module_exit();
11728 		return ret;
11729 	}
11730 	tpacpi_sensors_pdev = platform_device_register_simple(
11731 						TPACPI_HWMON_DRVR_NAME,
11732 						PLATFORM_DEVID_NONE, NULL, 0);
11733 	if (IS_ERR(tpacpi_sensors_pdev)) {
11734 		ret = PTR_ERR(tpacpi_sensors_pdev);
11735 		tpacpi_sensors_pdev = NULL;
11736 		pr_err("unable to register hwmon platform device\n");
11737 		thinkpad_acpi_module_exit();
11738 		return ret;
11739 	}
11740 
11741 	mutex_init(&tpacpi_inputdev_send_mutex);
11742 	tpacpi_inputdev = input_allocate_device();
11743 	if (!tpacpi_inputdev) {
11744 		thinkpad_acpi_module_exit();
11745 		return -ENOMEM;
11746 	} else {
11747 		/* Prepare input device, but don't register */
11748 		tpacpi_inputdev->name = "ThinkPad Extra Buttons";
11749 		tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0";
11750 		tpacpi_inputdev->id.bustype = BUS_HOST;
11751 		tpacpi_inputdev->id.vendor = thinkpad_id.vendor;
11752 		tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
11753 		tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
11754 		tpacpi_inputdev->dev.parent = &tpacpi_pdev->dev;
11755 	}
11756 
11757 	/* Init subdriver dependencies */
11758 	tpacpi_detect_brightness_capabilities();
11759 
11760 	/* Init subdrivers */
11761 	for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
11762 		ret = ibm_init(&ibms_init[i]);
11763 		if (ret >= 0 && *ibms_init[i].param)
11764 			ret = ibms_init[i].data->write(ibms_init[i].param);
11765 		if (ret < 0) {
11766 			thinkpad_acpi_module_exit();
11767 			return ret;
11768 		}
11769 	}
11770 
11771 	tpacpi_lifecycle = TPACPI_LIFE_RUNNING;
11772 
11773 	ret = platform_driver_register(&tpacpi_pdriver);
11774 	if (ret) {
11775 		pr_err("unable to register main platform driver\n");
11776 		thinkpad_acpi_module_exit();
11777 		return ret;
11778 	}
11779 	tp_features.platform_drv_registered = 1;
11780 
11781 	ret = platform_driver_register(&tpacpi_hwmon_pdriver);
11782 	if (ret) {
11783 		pr_err("unable to register hwmon platform driver\n");
11784 		thinkpad_acpi_module_exit();
11785 		return ret;
11786 	}
11787 	tp_features.sensors_pdrv_registered = 1;
11788 
11789 	tpacpi_hwmon = hwmon_device_register_with_groups(
11790 		&tpacpi_sensors_pdev->dev, TPACPI_NAME, NULL, tpacpi_hwmon_groups);
11791 	if (IS_ERR(tpacpi_hwmon)) {
11792 		ret = PTR_ERR(tpacpi_hwmon);
11793 		tpacpi_hwmon = NULL;
11794 		pr_err("unable to register hwmon device\n");
11795 		thinkpad_acpi_module_exit();
11796 		return ret;
11797 	}
11798 
11799 	ret = input_register_device(tpacpi_inputdev);
11800 	if (ret < 0) {
11801 		pr_err("unable to register input device\n");
11802 		thinkpad_acpi_module_exit();
11803 		return ret;
11804 	} else {
11805 		tp_features.input_device_registered = 1;
11806 	}
11807 
11808 	return 0;
11809 }
11810 
11811 MODULE_ALIAS(TPACPI_DRVR_SHORTNAME);
11812 
11813 /*
11814  * This will autoload the driver in almost every ThinkPad
11815  * in widespread use.
11816  *
11817  * Only _VERY_ old models, like the 240, 240x and 570 lack
11818  * the HKEY event interface.
11819  */
11820 MODULE_DEVICE_TABLE(acpi, ibm_htk_device_ids);
11821 
11822 /*
11823  * DMI matching for module autoloading
11824  *
11825  * See https://thinkwiki.org/wiki/List_of_DMI_IDs
11826  * See https://thinkwiki.org/wiki/BIOS_Upgrade_Downloads
11827  *
11828  * Only models listed in thinkwiki will be supported, so add yours
11829  * if it is not there yet.
11830  */
11831 #define IBM_BIOS_MODULE_ALIAS(__type) \
11832 	MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW*")
11833 
11834 /* Ancient thinkpad BIOSes have to be identified by
11835  * BIOS type or model number, and there are far less
11836  * BIOS types than model numbers... */
11837 IBM_BIOS_MODULE_ALIAS("I[MU]");		/* 570, 570e */
11838 
11839 MODULE_AUTHOR("Borislav Deianov <borislav@users.sf.net>");
11840 MODULE_AUTHOR("Henrique de Moraes Holschuh <hmh@hmh.eng.br>");
11841 MODULE_DESCRIPTION(TPACPI_DESC);
11842 MODULE_VERSION(TPACPI_VERSION);
11843 MODULE_LICENSE("GPL");
11844 
11845 module_init(thinkpad_acpi_module_init);
11846 module_exit(thinkpad_acpi_module_exit);
11847