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/module.h>
54 #include <linux/mutex.h>
55 #include <linux/nvram.h>
56 #include <linux/pci.h>
57 #include <linux/platform_device.h>
58 #include <linux/platform_profile.h>
59 #include <linux/power_supply.h>
60 #include <linux/proc_fs.h>
61 #include <linux/rfkill.h>
62 #include <linux/sched.h>
63 #include <linux/sched/signal.h>
64 #include <linux/seq_file.h>
65 #include <linux/slab.h>
66 #include <linux/string.h>
67 #include <linux/string_helpers.h>
68 #include <linux/sysfs.h>
69 #include <linux/types.h>
70 #include <linux/uaccess.h>
71 #include <linux/workqueue.h>
72 
73 #include <acpi/battery.h>
74 #include <acpi/video.h>
75 
76 #include <drm/drm_privacy_screen_driver.h>
77 
78 #include <sound/control.h>
79 #include <sound/core.h>
80 #include <sound/initval.h>
81 
82 #include "dual_accel_detect.h"
83 
84 /* ThinkPad CMOS commands */
85 #define TP_CMOS_VOLUME_DOWN	0
86 #define TP_CMOS_VOLUME_UP	1
87 #define TP_CMOS_VOLUME_MUTE	2
88 #define TP_CMOS_BRIGHTNESS_UP	4
89 #define TP_CMOS_BRIGHTNESS_DOWN	5
90 #define TP_CMOS_THINKLIGHT_ON	12
91 #define TP_CMOS_THINKLIGHT_OFF	13
92 
93 /* NVRAM Addresses */
94 enum tp_nvram_addr {
95 	TP_NVRAM_ADDR_HK2		= 0x57,
96 	TP_NVRAM_ADDR_THINKLIGHT	= 0x58,
97 	TP_NVRAM_ADDR_VIDEO		= 0x59,
98 	TP_NVRAM_ADDR_BRIGHTNESS	= 0x5e,
99 	TP_NVRAM_ADDR_MIXER		= 0x60,
100 };
101 
102 /* NVRAM bit masks */
103 enum {
104 	TP_NVRAM_MASK_HKT_THINKPAD	= 0x08,
105 	TP_NVRAM_MASK_HKT_ZOOM		= 0x20,
106 	TP_NVRAM_MASK_HKT_DISPLAY	= 0x40,
107 	TP_NVRAM_MASK_HKT_HIBERNATE	= 0x80,
108 	TP_NVRAM_MASK_THINKLIGHT	= 0x10,
109 	TP_NVRAM_MASK_HKT_DISPEXPND	= 0x30,
110 	TP_NVRAM_MASK_HKT_BRIGHTNESS	= 0x20,
111 	TP_NVRAM_MASK_LEVEL_BRIGHTNESS	= 0x0f,
112 	TP_NVRAM_POS_LEVEL_BRIGHTNESS	= 0,
113 	TP_NVRAM_MASK_MUTE		= 0x40,
114 	TP_NVRAM_MASK_HKT_VOLUME	= 0x80,
115 	TP_NVRAM_MASK_LEVEL_VOLUME	= 0x0f,
116 	TP_NVRAM_POS_LEVEL_VOLUME	= 0,
117 };
118 
119 /* Misc NVRAM-related */
120 enum {
121 	TP_NVRAM_LEVEL_VOLUME_MAX = 14,
122 };
123 
124 /* ACPI HIDs */
125 #define TPACPI_ACPI_IBM_HKEY_HID	"IBM0068"
126 #define TPACPI_ACPI_LENOVO_HKEY_HID	"LEN0068"
127 #define TPACPI_ACPI_LENOVO_HKEY_V2_HID	"LEN0268"
128 #define TPACPI_ACPI_EC_HID		"PNP0C09"
129 
130 /* Input IDs */
131 #define TPACPI_HKEY_INPUT_PRODUCT	0x5054 /* "TP" */
132 #define TPACPI_HKEY_INPUT_VERSION	0x4101
133 
134 /* ACPI \WGSV commands */
135 enum {
136 	TP_ACPI_WGSV_GET_STATE		= 0x01, /* Get state information */
137 	TP_ACPI_WGSV_PWR_ON_ON_RESUME	= 0x02, /* Resume WWAN powered on */
138 	TP_ACPI_WGSV_PWR_OFF_ON_RESUME	= 0x03,	/* Resume WWAN powered off */
139 	TP_ACPI_WGSV_SAVE_STATE		= 0x04, /* Save state for S4/S5 */
140 };
141 
142 /* TP_ACPI_WGSV_GET_STATE bits */
143 enum {
144 	TP_ACPI_WGSV_STATE_WWANEXIST	= 0x0001, /* WWAN hw available */
145 	TP_ACPI_WGSV_STATE_WWANPWR	= 0x0002, /* WWAN radio enabled */
146 	TP_ACPI_WGSV_STATE_WWANPWRRES	= 0x0004, /* WWAN state at resume */
147 	TP_ACPI_WGSV_STATE_WWANBIOSOFF	= 0x0008, /* WWAN disabled in BIOS */
148 	TP_ACPI_WGSV_STATE_BLTHEXIST	= 0x0001, /* BLTH hw available */
149 	TP_ACPI_WGSV_STATE_BLTHPWR	= 0x0002, /* BLTH radio enabled */
150 	TP_ACPI_WGSV_STATE_BLTHPWRRES	= 0x0004, /* BLTH state at resume */
151 	TP_ACPI_WGSV_STATE_BLTHBIOSOFF	= 0x0008, /* BLTH disabled in BIOS */
152 	TP_ACPI_WGSV_STATE_UWBEXIST	= 0x0010, /* UWB hw available */
153 	TP_ACPI_WGSV_STATE_UWBPWR	= 0x0020, /* UWB radio enabled */
154 };
155 
156 /* HKEY events */
157 enum tpacpi_hkey_event_t {
158 	/* Hotkey-related */
159 	TP_HKEY_EV_HOTKEY_BASE		= 0x1001, /* first hotkey (FN+F1) */
160 	TP_HKEY_EV_BRGHT_UP		= 0x1010, /* Brightness up */
161 	TP_HKEY_EV_BRGHT_DOWN		= 0x1011, /* Brightness down */
162 	TP_HKEY_EV_KBD_LIGHT		= 0x1012, /* Thinklight/kbd backlight */
163 	TP_HKEY_EV_VOL_UP		= 0x1015, /* Volume up or unmute */
164 	TP_HKEY_EV_VOL_DOWN		= 0x1016, /* Volume down or unmute */
165 	TP_HKEY_EV_VOL_MUTE		= 0x1017, /* Mixer output mute */
166 	TP_HKEY_EV_PRIVACYGUARD_TOGGLE	= 0x130f, /* Toggle priv.guard on/off */
167 	TP_HKEY_EV_AMT_TOGGLE		= 0x131a, /* Toggle AMT on/off */
168 
169 	/* Reasons for waking up from S3/S4 */
170 	TP_HKEY_EV_WKUP_S3_UNDOCK	= 0x2304, /* undock requested, S3 */
171 	TP_HKEY_EV_WKUP_S4_UNDOCK	= 0x2404, /* undock requested, S4 */
172 	TP_HKEY_EV_WKUP_S3_BAYEJ	= 0x2305, /* bay ejection req, S3 */
173 	TP_HKEY_EV_WKUP_S4_BAYEJ	= 0x2405, /* bay ejection req, S4 */
174 	TP_HKEY_EV_WKUP_S3_BATLOW	= 0x2313, /* battery empty, S3 */
175 	TP_HKEY_EV_WKUP_S4_BATLOW	= 0x2413, /* battery empty, S4 */
176 
177 	/* Auto-sleep after eject request */
178 	TP_HKEY_EV_BAYEJ_ACK		= 0x3003, /* bay ejection complete */
179 	TP_HKEY_EV_UNDOCK_ACK		= 0x4003, /* undock complete */
180 
181 	/* Misc bay events */
182 	TP_HKEY_EV_OPTDRV_EJ		= 0x3006, /* opt. drive tray ejected */
183 	TP_HKEY_EV_HOTPLUG_DOCK		= 0x4010, /* docked into hotplug dock
184 						     or port replicator */
185 	TP_HKEY_EV_HOTPLUG_UNDOCK	= 0x4011, /* undocked from hotplug
186 						     dock or port replicator */
187 	/*
188 	 * Thinkpad X1 Tablet series devices emit 0x4012 and 0x4013
189 	 * when keyboard cover is attached, detached or folded onto the back
190 	 */
191 	TP_HKEY_EV_KBD_COVER_ATTACH	= 0x4012, /* keyboard cover attached */
192 	TP_HKEY_EV_KBD_COVER_DETACH	= 0x4013, /* keyboard cover detached or folded back */
193 
194 	/* User-interface events */
195 	TP_HKEY_EV_LID_CLOSE		= 0x5001, /* laptop lid closed */
196 	TP_HKEY_EV_LID_OPEN		= 0x5002, /* laptop lid opened */
197 	TP_HKEY_EV_TABLET_TABLET	= 0x5009, /* tablet swivel up */
198 	TP_HKEY_EV_TABLET_NOTEBOOK	= 0x500a, /* tablet swivel down */
199 	TP_HKEY_EV_TABLET_CHANGED	= 0x60c0, /* X1 Yoga (2016):
200 						   * enter/leave tablet mode
201 						   */
202 	TP_HKEY_EV_PEN_INSERTED		= 0x500b, /* tablet pen inserted */
203 	TP_HKEY_EV_PEN_REMOVED		= 0x500c, /* tablet pen removed */
204 	TP_HKEY_EV_BRGHT_CHANGED	= 0x5010, /* backlight control event */
205 
206 	/* Key-related user-interface events */
207 	TP_HKEY_EV_KEY_NUMLOCK		= 0x6000, /* NumLock key pressed */
208 	TP_HKEY_EV_KEY_FN		= 0x6005, /* Fn key pressed? E420 */
209 	TP_HKEY_EV_KEY_FN_ESC           = 0x6060, /* Fn+Esc key pressed X240 */
210 
211 	/* Thermal events */
212 	TP_HKEY_EV_ALARM_BAT_HOT	= 0x6011, /* battery too hot */
213 	TP_HKEY_EV_ALARM_BAT_XHOT	= 0x6012, /* battery critically hot */
214 	TP_HKEY_EV_ALARM_SENSOR_HOT	= 0x6021, /* sensor too hot */
215 	TP_HKEY_EV_ALARM_SENSOR_XHOT	= 0x6022, /* sensor critically hot */
216 	TP_HKEY_EV_THM_TABLE_CHANGED	= 0x6030, /* windows; thermal table changed */
217 	TP_HKEY_EV_THM_CSM_COMPLETED    = 0x6032, /* windows; thermal control set
218 						   * command completed. Related to
219 						   * AML DYTC */
220 	TP_HKEY_EV_THM_TRANSFM_CHANGED  = 0x60F0, /* windows; thermal transformation
221 						   * changed. Related to AML GMTS */
222 
223 	/* AC-related events */
224 	TP_HKEY_EV_AC_CHANGED		= 0x6040, /* AC status changed */
225 
226 	/* Further user-interface events */
227 	TP_HKEY_EV_PALM_DETECTED	= 0x60b0, /* palm hoveres keyboard */
228 	TP_HKEY_EV_PALM_UNDETECTED	= 0x60b1, /* palm removed */
229 
230 	/* Misc */
231 	TP_HKEY_EV_RFKILL_CHANGED	= 0x7000, /* rfkill switch changed */
232 };
233 
234 /****************************************************************************
235  * Main driver
236  */
237 
238 #define TPACPI_NAME "thinkpad"
239 #define TPACPI_DESC "ThinkPad ACPI Extras"
240 #define TPACPI_FILE TPACPI_NAME "_acpi"
241 #define TPACPI_URL "http://ibm-acpi.sf.net/"
242 #define TPACPI_MAIL "ibm-acpi-devel@lists.sourceforge.net"
243 
244 #define TPACPI_PROC_DIR "ibm"
245 #define TPACPI_ACPI_EVENT_PREFIX "ibm"
246 #define TPACPI_DRVR_NAME TPACPI_FILE
247 #define TPACPI_DRVR_SHORTNAME "tpacpi"
248 #define TPACPI_HWMON_DRVR_NAME TPACPI_NAME "_hwmon"
249 
250 #define TPACPI_NVRAM_KTHREAD_NAME "ktpacpi_nvramd"
251 #define TPACPI_WORKQUEUE_NAME "ktpacpid"
252 
253 #define TPACPI_MAX_ACPI_ARGS 3
254 
255 /* Debugging printk groups */
256 #define TPACPI_DBG_ALL		0xffff
257 #define TPACPI_DBG_DISCLOSETASK	0x8000
258 #define TPACPI_DBG_INIT		0x0001
259 #define TPACPI_DBG_EXIT		0x0002
260 #define TPACPI_DBG_RFKILL	0x0004
261 #define TPACPI_DBG_HKEY		0x0008
262 #define TPACPI_DBG_FAN		0x0010
263 #define TPACPI_DBG_BRGHT	0x0020
264 #define TPACPI_DBG_MIXER	0x0040
265 
266 #define FAN_NOT_PRESENT		65535
267 
268 #define strlencmp(a, b) (strncmp((a), (b), strlen(b)))
269 
270 
271 /****************************************************************************
272  * Driver-wide structs and misc. variables
273  */
274 
275 struct ibm_struct;
276 
277 struct tp_acpi_drv_struct {
278 	const struct acpi_device_id *hid;
279 	struct acpi_driver *driver;
280 
281 	void (*notify) (struct ibm_struct *, u32);
282 	acpi_handle *handle;
283 	u32 type;
284 	struct acpi_device *device;
285 };
286 
287 struct ibm_struct {
288 	char *name;
289 
290 	int (*read) (struct seq_file *);
291 	int (*write) (char *);
292 	void (*exit) (void);
293 	void (*resume) (void);
294 	void (*suspend) (void);
295 	void (*shutdown) (void);
296 
297 	struct list_head all_drivers;
298 
299 	struct tp_acpi_drv_struct *acpi;
300 
301 	struct {
302 		u8 acpi_driver_registered:1;
303 		u8 acpi_notify_installed:1;
304 		u8 proc_created:1;
305 		u8 init_called:1;
306 		u8 experimental:1;
307 	} flags;
308 };
309 
310 struct ibm_init_struct {
311 	char param[32];
312 
313 	int (*init) (struct ibm_init_struct *);
314 	umode_t base_procfs_mode;
315 	struct ibm_struct *data;
316 };
317 
318 /* DMI Quirks */
319 struct quirk_entry {
320 	bool btusb_bug;
321 	u32 s2idle_bug_mmio;
322 };
323 
324 static struct quirk_entry quirk_btusb_bug = {
325 	.btusb_bug = true,
326 };
327 
328 static struct quirk_entry quirk_s2idle_bug = {
329 	.s2idle_bug_mmio = 0xfed80380,
330 };
331 
332 static struct {
333 	u32 bluetooth:1;
334 	u32 hotkey:1;
335 	u32 hotkey_mask:1;
336 	u32 hotkey_wlsw:1;
337 	enum {
338 		TP_HOTKEY_TABLET_NONE = 0,
339 		TP_HOTKEY_TABLET_USES_MHKG,
340 		TP_HOTKEY_TABLET_USES_GMMS,
341 	} hotkey_tablet;
342 	u32 kbdlight:1;
343 	u32 light:1;
344 	u32 light_status:1;
345 	u32 bright_acpimode:1;
346 	u32 bright_unkfw:1;
347 	u32 wan:1;
348 	u32 uwb:1;
349 	u32 fan_ctrl_status_undef:1;
350 	u32 second_fan:1;
351 	u32 second_fan_ctl:1;
352 	u32 beep_needs_two_args:1;
353 	u32 mixer_no_level_control:1;
354 	u32 battery_force_primary:1;
355 	u32 input_device_registered:1;
356 	u32 platform_drv_registered:1;
357 	u32 sensors_pdrv_registered:1;
358 	u32 hotkey_poll_active:1;
359 	u32 has_adaptive_kbd:1;
360 	u32 kbd_lang:1;
361 	struct quirk_entry *quirks;
362 } tp_features;
363 
364 static struct {
365 	u16 hotkey_mask_ff:1;
366 	u16 volume_ctrl_forbidden:1;
367 } tp_warned;
368 
369 struct thinkpad_id_data {
370 	unsigned int vendor;	/* ThinkPad vendor:
371 				 * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */
372 
373 	char *bios_version_str;	/* Something like 1ZET51WW (1.03z) */
374 	char *ec_version_str;	/* Something like 1ZHT51WW-1.04a */
375 
376 	u32 bios_model;		/* 1Y = 0x3159, 0 = unknown */
377 	u32 ec_model;
378 	u16 bios_release;	/* 1ZETK1WW = 0x4b31, 0 = unknown */
379 	u16 ec_release;
380 
381 	char *model_str;	/* ThinkPad T43 */
382 	char *nummodel_str;	/* 9384A9C for a 9384-A9C model */
383 };
384 static struct thinkpad_id_data thinkpad_id;
385 
386 static enum {
387 	TPACPI_LIFE_INIT = 0,
388 	TPACPI_LIFE_RUNNING,
389 	TPACPI_LIFE_EXITING,
390 } tpacpi_lifecycle;
391 
392 static int experimental;
393 static u32 dbg_level;
394 
395 static struct workqueue_struct *tpacpi_wq;
396 
397 enum led_status_t {
398 	TPACPI_LED_OFF = 0,
399 	TPACPI_LED_ON,
400 	TPACPI_LED_BLINK,
401 };
402 
403 /* tpacpi LED class */
404 struct tpacpi_led_classdev {
405 	struct led_classdev led_classdev;
406 	int led;
407 };
408 
409 /* brightness level capabilities */
410 static unsigned int bright_maxlvl;	/* 0 = unknown */
411 
412 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
413 static int dbg_wlswemul;
414 static bool tpacpi_wlsw_emulstate;
415 static int dbg_bluetoothemul;
416 static bool tpacpi_bluetooth_emulstate;
417 static int dbg_wwanemul;
418 static bool tpacpi_wwan_emulstate;
419 static int dbg_uwbemul;
420 static bool tpacpi_uwb_emulstate;
421 #endif
422 
423 
424 /*************************************************************************
425  *  Debugging helpers
426  */
427 
428 #define dbg_printk(a_dbg_level, format, arg...)				\
429 do {									\
430 	if (dbg_level & (a_dbg_level))					\
431 		printk(KERN_DEBUG pr_fmt("%s: " format),		\
432 		       __func__, ##arg);				\
433 } while (0)
434 
435 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
436 #define vdbg_printk dbg_printk
437 static const char *str_supported(int is_supported);
438 #else
439 static inline const char *str_supported(int is_supported) { return ""; }
440 #define vdbg_printk(a_dbg_level, format, arg...)	\
441 	do { if (0) no_printk(format, ##arg); } while (0)
442 #endif
443 
444 static void tpacpi_log_usertask(const char * const what)
445 {
446 	printk(KERN_DEBUG pr_fmt("%s: access by process with PID %d\n"),
447 	       what, task_tgid_vnr(current));
448 }
449 
450 #define tpacpi_disclose_usertask(what, format, arg...)			\
451 do {									\
452 	if (unlikely((dbg_level & TPACPI_DBG_DISCLOSETASK) &&		\
453 		     (tpacpi_lifecycle == TPACPI_LIFE_RUNNING))) {	\
454 		printk(KERN_DEBUG pr_fmt("%s: PID %d: " format),	\
455 		       what, task_tgid_vnr(current), ## arg);		\
456 	}								\
457 } while (0)
458 
459 /*
460  * Quirk handling helpers
461  *
462  * ThinkPad IDs and versions seen in the field so far are
463  * two or three characters from the set [0-9A-Z], i.e. base 36.
464  *
465  * We use values well outside that range as specials.
466  */
467 
468 #define TPACPI_MATCH_ANY		0xffffffffU
469 #define TPACPI_MATCH_ANY_VERSION	0xffffU
470 #define TPACPI_MATCH_UNKNOWN		0U
471 
472 /* TPID('1', 'Y') == 0x3159 */
473 #define TPID(__c1, __c2)	(((__c1) << 8) | (__c2))
474 #define TPID3(__c1, __c2, __c3)	(((__c1) << 16) | ((__c2) << 8) | (__c3))
475 #define TPVER TPID
476 
477 #define TPACPI_Q_IBM(__id1, __id2, __quirk)	\
478 	{ .vendor = PCI_VENDOR_ID_IBM,		\
479 	  .bios = TPID(__id1, __id2),		\
480 	  .ec = TPACPI_MATCH_ANY,		\
481 	  .quirks = (__quirk) }
482 
483 #define TPACPI_Q_LNV(__id1, __id2, __quirk)	\
484 	{ .vendor = PCI_VENDOR_ID_LENOVO,	\
485 	  .bios = TPID(__id1, __id2),		\
486 	  .ec = TPACPI_MATCH_ANY,		\
487 	  .quirks = (__quirk) }
488 
489 #define TPACPI_Q_LNV3(__id1, __id2, __id3, __quirk) \
490 	{ .vendor = PCI_VENDOR_ID_LENOVO,	\
491 	  .bios = TPID3(__id1, __id2, __id3),	\
492 	  .ec = TPACPI_MATCH_ANY,		\
493 	  .quirks = (__quirk) }
494 
495 #define TPACPI_QEC_IBM(__id1, __id2, __quirk)	\
496 	{ .vendor = PCI_VENDOR_ID_IBM,		\
497 	  .bios = TPACPI_MATCH_ANY,		\
498 	  .ec = TPID(__id1, __id2),		\
499 	  .quirks = (__quirk) }
500 
501 #define TPACPI_QEC_LNV(__id1, __id2, __quirk)	\
502 	{ .vendor = PCI_VENDOR_ID_LENOVO,	\
503 	  .bios = TPACPI_MATCH_ANY,		\
504 	  .ec = TPID(__id1, __id2),		\
505 	  .quirks = (__quirk) }
506 
507 struct tpacpi_quirk {
508 	unsigned int vendor;
509 	u32 bios;
510 	u32 ec;
511 	unsigned long quirks;
512 };
513 
514 /**
515  * tpacpi_check_quirks() - search BIOS/EC version on a list
516  * @qlist:		array of &struct tpacpi_quirk
517  * @qlist_size:		number of elements in @qlist
518  *
519  * Iterates over a quirks list until one is found that matches the
520  * ThinkPad's vendor, BIOS and EC model.
521  *
522  * Returns 0 if nothing matches, otherwise returns the quirks field of
523  * the matching &struct tpacpi_quirk entry.
524  *
525  * The match criteria is: vendor, ec and bios much match.
526  */
527 static unsigned long __init tpacpi_check_quirks(
528 			const struct tpacpi_quirk *qlist,
529 			unsigned int qlist_size)
530 {
531 	while (qlist_size) {
532 		if ((qlist->vendor == thinkpad_id.vendor ||
533 				qlist->vendor == TPACPI_MATCH_ANY) &&
534 		    (qlist->bios == thinkpad_id.bios_model ||
535 				qlist->bios == TPACPI_MATCH_ANY) &&
536 		    (qlist->ec == thinkpad_id.ec_model ||
537 				qlist->ec == TPACPI_MATCH_ANY))
538 			return qlist->quirks;
539 
540 		qlist_size--;
541 		qlist++;
542 	}
543 	return 0;
544 }
545 
546 static inline bool __pure __init tpacpi_is_lenovo(void)
547 {
548 	return thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO;
549 }
550 
551 static inline bool __pure __init tpacpi_is_ibm(void)
552 {
553 	return thinkpad_id.vendor == PCI_VENDOR_ID_IBM;
554 }
555 
556 /****************************************************************************
557  ****************************************************************************
558  *
559  * ACPI Helpers and device model
560  *
561  ****************************************************************************
562  ****************************************************************************/
563 
564 /*************************************************************************
565  * ACPI basic handles
566  */
567 
568 static acpi_handle root_handle;
569 static acpi_handle ec_handle;
570 
571 #define TPACPI_HANDLE(object, parent, paths...)			\
572 	static acpi_handle  object##_handle;			\
573 	static const acpi_handle * const object##_parent __initconst =	\
574 						&parent##_handle; \
575 	static char *object##_paths[] __initdata = { paths }
576 
577 TPACPI_HANDLE(ecrd, ec, "ECRD");	/* 570 */
578 TPACPI_HANDLE(ecwr, ec, "ECWR");	/* 570 */
579 
580 TPACPI_HANDLE(cmos, root, "\\UCMS",	/* R50, R50e, R50p, R51, */
581 					/* T4x, X31, X40 */
582 	   "\\CMOS",		/* A3x, G4x, R32, T23, T30, X22-24, X30 */
583 	   "\\CMS",		/* R40, R40e */
584 	   );			/* all others */
585 
586 TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY",	/* 600e/x, 770e, 770x */
587 	   "^HKEY",		/* R30, R31 */
588 	   "HKEY",		/* all others */
589 	   );			/* 570 */
590 
591 /*************************************************************************
592  * ACPI helpers
593  */
594 
595 static int acpi_evalf(acpi_handle handle,
596 		      int *res, char *method, char *fmt, ...)
597 {
598 	char *fmt0 = fmt;
599 	struct acpi_object_list params;
600 	union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS];
601 	struct acpi_buffer result, *resultp;
602 	union acpi_object out_obj;
603 	acpi_status status;
604 	va_list ap;
605 	char res_type;
606 	int success;
607 	int quiet;
608 
609 	if (!*fmt) {
610 		pr_err("acpi_evalf() called with empty format\n");
611 		return 0;
612 	}
613 
614 	if (*fmt == 'q') {
615 		quiet = 1;
616 		fmt++;
617 	} else
618 		quiet = 0;
619 
620 	res_type = *(fmt++);
621 
622 	params.count = 0;
623 	params.pointer = &in_objs[0];
624 
625 	va_start(ap, fmt);
626 	while (*fmt) {
627 		char c = *(fmt++);
628 		switch (c) {
629 		case 'd':	/* int */
630 			in_objs[params.count].integer.value = va_arg(ap, int);
631 			in_objs[params.count++].type = ACPI_TYPE_INTEGER;
632 			break;
633 			/* add more types as needed */
634 		default:
635 			pr_err("acpi_evalf() called with invalid format character '%c'\n",
636 			       c);
637 			va_end(ap);
638 			return 0;
639 		}
640 	}
641 	va_end(ap);
642 
643 	if (res_type != 'v') {
644 		result.length = sizeof(out_obj);
645 		result.pointer = &out_obj;
646 		resultp = &result;
647 	} else
648 		resultp = NULL;
649 
650 	status = acpi_evaluate_object(handle, method, &params, resultp);
651 
652 	switch (res_type) {
653 	case 'd':		/* int */
654 		success = (status == AE_OK &&
655 			   out_obj.type == ACPI_TYPE_INTEGER);
656 		if (success && res)
657 			*res = out_obj.integer.value;
658 		break;
659 	case 'v':		/* void */
660 		success = status == AE_OK;
661 		break;
662 		/* add more types as needed */
663 	default:
664 		pr_err("acpi_evalf() called with invalid format character '%c'\n",
665 		       res_type);
666 		return 0;
667 	}
668 
669 	if (!success && !quiet)
670 		pr_err("acpi_evalf(%s, %s, ...) failed: %s\n",
671 		       method, fmt0, acpi_format_exception(status));
672 
673 	return success;
674 }
675 
676 static int acpi_ec_read(int i, u8 *p)
677 {
678 	int v;
679 
680 	if (ecrd_handle) {
681 		if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
682 			return 0;
683 		*p = v;
684 	} else {
685 		if (ec_read(i, p) < 0)
686 			return 0;
687 	}
688 
689 	return 1;
690 }
691 
692 static int acpi_ec_write(int i, u8 v)
693 {
694 	if (ecwr_handle) {
695 		if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
696 			return 0;
697 	} else {
698 		if (ec_write(i, v) < 0)
699 			return 0;
700 	}
701 
702 	return 1;
703 }
704 
705 static int issue_thinkpad_cmos_command(int cmos_cmd)
706 {
707 	if (!cmos_handle)
708 		return -ENXIO;
709 
710 	if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
711 		return -EIO;
712 
713 	return 0;
714 }
715 
716 /*************************************************************************
717  * ACPI device model
718  */
719 
720 #define TPACPI_ACPIHANDLE_INIT(object) \
721 	drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \
722 		object##_paths, ARRAY_SIZE(object##_paths))
723 
724 static void __init drv_acpi_handle_init(const char *name,
725 			   acpi_handle *handle, const acpi_handle parent,
726 			   char **paths, const int num_paths)
727 {
728 	int i;
729 	acpi_status status;
730 
731 	vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n",
732 		name);
733 
734 	for (i = 0; i < num_paths; i++) {
735 		status = acpi_get_handle(parent, paths[i], handle);
736 		if (ACPI_SUCCESS(status)) {
737 			dbg_printk(TPACPI_DBG_INIT,
738 				   "Found ACPI handle %s for %s\n",
739 				   paths[i], name);
740 			return;
741 		}
742 	}
743 
744 	vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n",
745 		    name);
746 	*handle = NULL;
747 }
748 
749 static acpi_status __init tpacpi_acpi_handle_locate_callback(acpi_handle handle,
750 			u32 level, void *context, void **return_value)
751 {
752 	if (!strcmp(context, "video")) {
753 		struct acpi_device *dev = acpi_fetch_acpi_dev(handle);
754 
755 		if (!dev || strcmp(ACPI_VIDEO_HID, acpi_device_hid(dev)))
756 			return AE_OK;
757 	}
758 
759 	*(acpi_handle *)return_value = handle;
760 
761 	return AE_CTRL_TERMINATE;
762 }
763 
764 static void __init tpacpi_acpi_handle_locate(const char *name,
765 		const char *hid,
766 		acpi_handle *handle)
767 {
768 	acpi_status status;
769 	acpi_handle device_found;
770 
771 	BUG_ON(!name || !handle);
772 	vdbg_printk(TPACPI_DBG_INIT,
773 			"trying to locate ACPI handle for %s, using HID %s\n",
774 			name, hid ? hid : "NULL");
775 
776 	memset(&device_found, 0, sizeof(device_found));
777 	status = acpi_get_devices(hid, tpacpi_acpi_handle_locate_callback,
778 				  (void *)name, &device_found);
779 
780 	*handle = NULL;
781 
782 	if (ACPI_SUCCESS(status)) {
783 		*handle = device_found;
784 		dbg_printk(TPACPI_DBG_INIT,
785 			   "Found ACPI handle for %s\n", name);
786 	} else {
787 		vdbg_printk(TPACPI_DBG_INIT,
788 			    "Could not locate an ACPI handle for %s: %s\n",
789 			    name, acpi_format_exception(status));
790 	}
791 }
792 
793 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
794 {
795 	struct ibm_struct *ibm = data;
796 
797 	if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
798 		return;
799 
800 	if (!ibm || !ibm->acpi || !ibm->acpi->notify)
801 		return;
802 
803 	ibm->acpi->notify(ibm, event);
804 }
805 
806 static int __init setup_acpi_notify(struct ibm_struct *ibm)
807 {
808 	acpi_status status;
809 
810 	BUG_ON(!ibm->acpi);
811 
812 	if (!*ibm->acpi->handle)
813 		return 0;
814 
815 	vdbg_printk(TPACPI_DBG_INIT,
816 		"setting up ACPI notify for %s\n", ibm->name);
817 
818 	ibm->acpi->device = acpi_fetch_acpi_dev(*ibm->acpi->handle);
819 	if (!ibm->acpi->device) {
820 		pr_err("acpi_fetch_acpi_dev(%s) failed\n", ibm->name);
821 		return -ENODEV;
822 	}
823 
824 	ibm->acpi->device->driver_data = ibm;
825 	sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
826 		TPACPI_ACPI_EVENT_PREFIX,
827 		ibm->name);
828 
829 	status = acpi_install_notify_handler(*ibm->acpi->handle,
830 			ibm->acpi->type, dispatch_acpi_notify, ibm);
831 	if (ACPI_FAILURE(status)) {
832 		if (status == AE_ALREADY_EXISTS) {
833 			pr_notice("another device driver is already handling %s events\n",
834 				  ibm->name);
835 		} else {
836 			pr_err("acpi_install_notify_handler(%s) failed: %s\n",
837 			       ibm->name, acpi_format_exception(status));
838 		}
839 		return -ENODEV;
840 	}
841 	ibm->flags.acpi_notify_installed = 1;
842 	return 0;
843 }
844 
845 static int __init tpacpi_device_add(struct acpi_device *device)
846 {
847 	return 0;
848 }
849 
850 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
851 {
852 	int rc;
853 
854 	dbg_printk(TPACPI_DBG_INIT,
855 		"registering %s as an ACPI driver\n", ibm->name);
856 
857 	BUG_ON(!ibm->acpi);
858 
859 	ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
860 	if (!ibm->acpi->driver) {
861 		pr_err("failed to allocate memory for ibm->acpi->driver\n");
862 		return -ENOMEM;
863 	}
864 
865 	sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name);
866 	ibm->acpi->driver->ids = ibm->acpi->hid;
867 
868 	ibm->acpi->driver->ops.add = &tpacpi_device_add;
869 
870 	rc = acpi_bus_register_driver(ibm->acpi->driver);
871 	if (rc < 0) {
872 		pr_err("acpi_bus_register_driver(%s) failed: %d\n",
873 		       ibm->name, rc);
874 		kfree(ibm->acpi->driver);
875 		ibm->acpi->driver = NULL;
876 	} else if (!rc)
877 		ibm->flags.acpi_driver_registered = 1;
878 
879 	return rc;
880 }
881 
882 
883 /****************************************************************************
884  ****************************************************************************
885  *
886  * Procfs Helpers
887  *
888  ****************************************************************************
889  ****************************************************************************/
890 
891 static int dispatch_proc_show(struct seq_file *m, void *v)
892 {
893 	struct ibm_struct *ibm = m->private;
894 
895 	if (!ibm || !ibm->read)
896 		return -EINVAL;
897 	return ibm->read(m);
898 }
899 
900 static int dispatch_proc_open(struct inode *inode, struct file *file)
901 {
902 	return single_open(file, dispatch_proc_show, pde_data(inode));
903 }
904 
905 static ssize_t dispatch_proc_write(struct file *file,
906 			const char __user *userbuf,
907 			size_t count, loff_t *pos)
908 {
909 	struct ibm_struct *ibm = pde_data(file_inode(file));
910 	char *kernbuf;
911 	int ret;
912 
913 	if (!ibm || !ibm->write)
914 		return -EINVAL;
915 	if (count > PAGE_SIZE - 1)
916 		return -EINVAL;
917 
918 	kernbuf = kmalloc(count + 1, GFP_KERNEL);
919 	if (!kernbuf)
920 		return -ENOMEM;
921 
922 	if (copy_from_user(kernbuf, userbuf, count)) {
923 		kfree(kernbuf);
924 		return -EFAULT;
925 	}
926 
927 	kernbuf[count] = 0;
928 	ret = ibm->write(kernbuf);
929 	if (ret == 0)
930 		ret = count;
931 
932 	kfree(kernbuf);
933 
934 	return ret;
935 }
936 
937 static const struct proc_ops dispatch_proc_ops = {
938 	.proc_open	= dispatch_proc_open,
939 	.proc_read	= seq_read,
940 	.proc_lseek	= seq_lseek,
941 	.proc_release	= single_release,
942 	.proc_write	= dispatch_proc_write,
943 };
944 
945 /****************************************************************************
946  ****************************************************************************
947  *
948  * Device model: input, hwmon and platform
949  *
950  ****************************************************************************
951  ****************************************************************************/
952 
953 static struct platform_device *tpacpi_pdev;
954 static struct platform_device *tpacpi_sensors_pdev;
955 static struct device *tpacpi_hwmon;
956 static struct input_dev *tpacpi_inputdev;
957 static struct mutex tpacpi_inputdev_send_mutex;
958 static LIST_HEAD(tpacpi_all_drivers);
959 
960 #ifdef CONFIG_PM_SLEEP
961 static int tpacpi_suspend_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->suspend)
969 			(ibm->suspend)();
970 	}
971 
972 	return 0;
973 }
974 
975 static int tpacpi_resume_handler(struct device *dev)
976 {
977 	struct ibm_struct *ibm, *itmp;
978 
979 	list_for_each_entry_safe(ibm, itmp,
980 				 &tpacpi_all_drivers,
981 				 all_drivers) {
982 		if (ibm->resume)
983 			(ibm->resume)();
984 	}
985 
986 	return 0;
987 }
988 #endif
989 
990 static SIMPLE_DEV_PM_OPS(tpacpi_pm,
991 			 tpacpi_suspend_handler, tpacpi_resume_handler);
992 
993 static void tpacpi_shutdown_handler(struct platform_device *pdev)
994 {
995 	struct ibm_struct *ibm, *itmp;
996 
997 	list_for_each_entry_safe(ibm, itmp,
998 				 &tpacpi_all_drivers,
999 				 all_drivers) {
1000 		if (ibm->shutdown)
1001 			(ibm->shutdown)();
1002 	}
1003 }
1004 
1005 /*************************************************************************
1006  * sysfs support helpers
1007  */
1008 
1009 static int parse_strtoul(const char *buf,
1010 		unsigned long max, unsigned long *value)
1011 {
1012 	char *endp;
1013 
1014 	*value = simple_strtoul(skip_spaces(buf), &endp, 0);
1015 	endp = skip_spaces(endp);
1016 	if (*endp || *value > max)
1017 		return -EINVAL;
1018 
1019 	return 0;
1020 }
1021 
1022 static void tpacpi_disable_brightness_delay(void)
1023 {
1024 	if (acpi_evalf(hkey_handle, NULL, "PWMS", "qvd", 0))
1025 		pr_notice("ACPI backlight control delay disabled\n");
1026 }
1027 
1028 static void printk_deprecated_attribute(const char * const what,
1029 					const char * const details)
1030 {
1031 	tpacpi_log_usertask("deprecated sysfs attribute");
1032 	pr_warn("WARNING: sysfs attribute %s is deprecated and will be removed. %s\n",
1033 		what, details);
1034 }
1035 
1036 /*************************************************************************
1037  * rfkill and radio control support helpers
1038  */
1039 
1040 /*
1041  * ThinkPad-ACPI firmware handling model:
1042  *
1043  * WLSW (master wireless switch) is event-driven, and is common to all
1044  * firmware-controlled radios.  It cannot be controlled, just monitored,
1045  * as expected.  It overrides all radio state in firmware
1046  *
1047  * The kernel, a masked-off hotkey, and WLSW can change the radio state
1048  * (TODO: verify how WLSW interacts with the returned radio state).
1049  *
1050  * The only time there are shadow radio state changes, is when
1051  * masked-off hotkeys are used.
1052  */
1053 
1054 /*
1055  * Internal driver API for radio state:
1056  *
1057  * int: < 0 = error, otherwise enum tpacpi_rfkill_state
1058  * bool: true means radio blocked (off)
1059  */
1060 enum tpacpi_rfkill_state {
1061 	TPACPI_RFK_RADIO_OFF = 0,
1062 	TPACPI_RFK_RADIO_ON
1063 };
1064 
1065 /* rfkill switches */
1066 enum tpacpi_rfk_id {
1067 	TPACPI_RFK_BLUETOOTH_SW_ID = 0,
1068 	TPACPI_RFK_WWAN_SW_ID,
1069 	TPACPI_RFK_UWB_SW_ID,
1070 	TPACPI_RFK_SW_MAX
1071 };
1072 
1073 static const char *tpacpi_rfkill_names[] = {
1074 	[TPACPI_RFK_BLUETOOTH_SW_ID] = "bluetooth",
1075 	[TPACPI_RFK_WWAN_SW_ID] = "wwan",
1076 	[TPACPI_RFK_UWB_SW_ID] = "uwb",
1077 	[TPACPI_RFK_SW_MAX] = NULL
1078 };
1079 
1080 /* ThinkPad-ACPI rfkill subdriver */
1081 struct tpacpi_rfk {
1082 	struct rfkill *rfkill;
1083 	enum tpacpi_rfk_id id;
1084 	const struct tpacpi_rfk_ops *ops;
1085 };
1086 
1087 struct tpacpi_rfk_ops {
1088 	/* firmware interface */
1089 	int (*get_status)(void);
1090 	int (*set_status)(const enum tpacpi_rfkill_state);
1091 };
1092 
1093 static struct tpacpi_rfk *tpacpi_rfkill_switches[TPACPI_RFK_SW_MAX];
1094 
1095 /* Query FW and update rfkill sw state for a given rfkill switch */
1096 static int tpacpi_rfk_update_swstate(const struct tpacpi_rfk *tp_rfk)
1097 {
1098 	int status;
1099 
1100 	if (!tp_rfk)
1101 		return -ENODEV;
1102 
1103 	status = (tp_rfk->ops->get_status)();
1104 	if (status < 0)
1105 		return status;
1106 
1107 	rfkill_set_sw_state(tp_rfk->rfkill,
1108 			    (status == TPACPI_RFK_RADIO_OFF));
1109 
1110 	return status;
1111 }
1112 
1113 /*
1114  * Sync the HW-blocking state of all rfkill switches,
1115  * do notice it causes the rfkill core to schedule uevents
1116  */
1117 static void tpacpi_rfk_update_hwblock_state(bool blocked)
1118 {
1119 	unsigned int i;
1120 	struct tpacpi_rfk *tp_rfk;
1121 
1122 	for (i = 0; i < TPACPI_RFK_SW_MAX; i++) {
1123 		tp_rfk = tpacpi_rfkill_switches[i];
1124 		if (tp_rfk) {
1125 			if (rfkill_set_hw_state(tp_rfk->rfkill,
1126 						blocked)) {
1127 				/* ignore -- we track sw block */
1128 			}
1129 		}
1130 	}
1131 }
1132 
1133 /* Call to get the WLSW state from the firmware */
1134 static int hotkey_get_wlsw(void);
1135 
1136 /* Call to query WLSW state and update all rfkill switches */
1137 static bool tpacpi_rfk_check_hwblock_state(void)
1138 {
1139 	int res = hotkey_get_wlsw();
1140 	int hw_blocked;
1141 
1142 	/* When unknown or unsupported, we have to assume it is unblocked */
1143 	if (res < 0)
1144 		return false;
1145 
1146 	hw_blocked = (res == TPACPI_RFK_RADIO_OFF);
1147 	tpacpi_rfk_update_hwblock_state(hw_blocked);
1148 
1149 	return hw_blocked;
1150 }
1151 
1152 static int tpacpi_rfk_hook_set_block(void *data, bool blocked)
1153 {
1154 	struct tpacpi_rfk *tp_rfk = data;
1155 	int res;
1156 
1157 	dbg_printk(TPACPI_DBG_RFKILL,
1158 		   "request to change radio state to %s\n",
1159 		   blocked ? "blocked" : "unblocked");
1160 
1161 	/* try to set radio state */
1162 	res = (tp_rfk->ops->set_status)(blocked ?
1163 				TPACPI_RFK_RADIO_OFF : TPACPI_RFK_RADIO_ON);
1164 
1165 	/* and update the rfkill core with whatever the FW really did */
1166 	tpacpi_rfk_update_swstate(tp_rfk);
1167 
1168 	return (res < 0) ? res : 0;
1169 }
1170 
1171 static const struct rfkill_ops tpacpi_rfk_rfkill_ops = {
1172 	.set_block = tpacpi_rfk_hook_set_block,
1173 };
1174 
1175 static int __init tpacpi_new_rfkill(const enum tpacpi_rfk_id id,
1176 			const struct tpacpi_rfk_ops *tp_rfkops,
1177 			const enum rfkill_type rfktype,
1178 			const char *name,
1179 			const bool set_default)
1180 {
1181 	struct tpacpi_rfk *atp_rfk;
1182 	int res;
1183 	bool sw_state = false;
1184 	bool hw_state;
1185 	int sw_status;
1186 
1187 	BUG_ON(id >= TPACPI_RFK_SW_MAX || tpacpi_rfkill_switches[id]);
1188 
1189 	atp_rfk = kzalloc(sizeof(struct tpacpi_rfk), GFP_KERNEL);
1190 	if (atp_rfk)
1191 		atp_rfk->rfkill = rfkill_alloc(name,
1192 						&tpacpi_pdev->dev,
1193 						rfktype,
1194 						&tpacpi_rfk_rfkill_ops,
1195 						atp_rfk);
1196 	if (!atp_rfk || !atp_rfk->rfkill) {
1197 		pr_err("failed to allocate memory for rfkill class\n");
1198 		kfree(atp_rfk);
1199 		return -ENOMEM;
1200 	}
1201 
1202 	atp_rfk->id = id;
1203 	atp_rfk->ops = tp_rfkops;
1204 
1205 	sw_status = (tp_rfkops->get_status)();
1206 	if (sw_status < 0) {
1207 		pr_err("failed to read initial state for %s, error %d\n",
1208 		       name, sw_status);
1209 	} else {
1210 		sw_state = (sw_status == TPACPI_RFK_RADIO_OFF);
1211 		if (set_default) {
1212 			/* try to keep the initial state, since we ask the
1213 			 * firmware to preserve it across S5 in NVRAM */
1214 			rfkill_init_sw_state(atp_rfk->rfkill, sw_state);
1215 		}
1216 	}
1217 	hw_state = tpacpi_rfk_check_hwblock_state();
1218 	rfkill_set_hw_state(atp_rfk->rfkill, hw_state);
1219 
1220 	res = rfkill_register(atp_rfk->rfkill);
1221 	if (res < 0) {
1222 		pr_err("failed to register %s rfkill switch: %d\n", name, res);
1223 		rfkill_destroy(atp_rfk->rfkill);
1224 		kfree(atp_rfk);
1225 		return res;
1226 	}
1227 
1228 	tpacpi_rfkill_switches[id] = atp_rfk;
1229 
1230 	pr_info("rfkill switch %s: radio is %sblocked\n",
1231 		name, (sw_state || hw_state) ? "" : "un");
1232 	return 0;
1233 }
1234 
1235 static void tpacpi_destroy_rfkill(const enum tpacpi_rfk_id id)
1236 {
1237 	struct tpacpi_rfk *tp_rfk;
1238 
1239 	BUG_ON(id >= TPACPI_RFK_SW_MAX);
1240 
1241 	tp_rfk = tpacpi_rfkill_switches[id];
1242 	if (tp_rfk) {
1243 		rfkill_unregister(tp_rfk->rfkill);
1244 		rfkill_destroy(tp_rfk->rfkill);
1245 		tpacpi_rfkill_switches[id] = NULL;
1246 		kfree(tp_rfk);
1247 	}
1248 }
1249 
1250 static void printk_deprecated_rfkill_attribute(const char * const what)
1251 {
1252 	printk_deprecated_attribute(what,
1253 			"Please switch to generic rfkill before year 2010");
1254 }
1255 
1256 /* sysfs <radio> enable ------------------------------------------------ */
1257 static ssize_t tpacpi_rfk_sysfs_enable_show(const enum tpacpi_rfk_id id,
1258 					    struct device_attribute *attr,
1259 					    char *buf)
1260 {
1261 	int status;
1262 
1263 	printk_deprecated_rfkill_attribute(attr->attr.name);
1264 
1265 	/* This is in the ABI... */
1266 	if (tpacpi_rfk_check_hwblock_state()) {
1267 		status = TPACPI_RFK_RADIO_OFF;
1268 	} else {
1269 		status = tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1270 		if (status < 0)
1271 			return status;
1272 	}
1273 
1274 	return sysfs_emit(buf, "%d\n",
1275 			(status == TPACPI_RFK_RADIO_ON) ? 1 : 0);
1276 }
1277 
1278 static ssize_t tpacpi_rfk_sysfs_enable_store(const enum tpacpi_rfk_id id,
1279 			    struct device_attribute *attr,
1280 			    const char *buf, size_t count)
1281 {
1282 	unsigned long t;
1283 	int res;
1284 
1285 	printk_deprecated_rfkill_attribute(attr->attr.name);
1286 
1287 	if (parse_strtoul(buf, 1, &t))
1288 		return -EINVAL;
1289 
1290 	tpacpi_disclose_usertask(attr->attr.name, "set to %ld\n", t);
1291 
1292 	/* This is in the ABI... */
1293 	if (tpacpi_rfk_check_hwblock_state() && !!t)
1294 		return -EPERM;
1295 
1296 	res = tpacpi_rfkill_switches[id]->ops->set_status((!!t) ?
1297 				TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF);
1298 	tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1299 
1300 	return (res < 0) ? res : count;
1301 }
1302 
1303 /* procfs -------------------------------------------------------------- */
1304 static int tpacpi_rfk_procfs_read(const enum tpacpi_rfk_id id, struct seq_file *m)
1305 {
1306 	if (id >= TPACPI_RFK_SW_MAX)
1307 		seq_printf(m, "status:\t\tnot supported\n");
1308 	else {
1309 		int status;
1310 
1311 		/* This is in the ABI... */
1312 		if (tpacpi_rfk_check_hwblock_state()) {
1313 			status = TPACPI_RFK_RADIO_OFF;
1314 		} else {
1315 			status = tpacpi_rfk_update_swstate(
1316 						tpacpi_rfkill_switches[id]);
1317 			if (status < 0)
1318 				return status;
1319 		}
1320 
1321 		seq_printf(m, "status:\t\t%s\n", str_enabled_disabled(status == TPACPI_RFK_RADIO_ON));
1322 		seq_printf(m, "commands:\tenable, disable\n");
1323 	}
1324 
1325 	return 0;
1326 }
1327 
1328 static int tpacpi_rfk_procfs_write(const enum tpacpi_rfk_id id, char *buf)
1329 {
1330 	char *cmd;
1331 	int status = -1;
1332 	int res = 0;
1333 
1334 	if (id >= TPACPI_RFK_SW_MAX)
1335 		return -ENODEV;
1336 
1337 	while ((cmd = strsep(&buf, ","))) {
1338 		if (strlencmp(cmd, "enable") == 0)
1339 			status = TPACPI_RFK_RADIO_ON;
1340 		else if (strlencmp(cmd, "disable") == 0)
1341 			status = TPACPI_RFK_RADIO_OFF;
1342 		else
1343 			return -EINVAL;
1344 	}
1345 
1346 	if (status != -1) {
1347 		tpacpi_disclose_usertask("procfs", "attempt to %s %s\n",
1348 				str_enable_disable(status == TPACPI_RFK_RADIO_ON),
1349 				tpacpi_rfkill_names[id]);
1350 		res = (tpacpi_rfkill_switches[id]->ops->set_status)(status);
1351 		tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]);
1352 	}
1353 
1354 	return res;
1355 }
1356 
1357 /*************************************************************************
1358  * thinkpad-acpi driver attributes
1359  */
1360 
1361 /* interface_version --------------------------------------------------- */
1362 static ssize_t interface_version_show(struct device_driver *drv, char *buf)
1363 {
1364 	return sysfs_emit(buf, "0x%08x\n", TPACPI_SYSFS_VERSION);
1365 }
1366 static DRIVER_ATTR_RO(interface_version);
1367 
1368 /* debug_level --------------------------------------------------------- */
1369 static ssize_t debug_level_show(struct device_driver *drv, char *buf)
1370 {
1371 	return sysfs_emit(buf, "0x%04x\n", dbg_level);
1372 }
1373 
1374 static ssize_t debug_level_store(struct device_driver *drv, const char *buf,
1375 				 size_t count)
1376 {
1377 	unsigned long t;
1378 
1379 	if (parse_strtoul(buf, 0xffff, &t))
1380 		return -EINVAL;
1381 
1382 	dbg_level = t;
1383 
1384 	return count;
1385 }
1386 static DRIVER_ATTR_RW(debug_level);
1387 
1388 /* version ------------------------------------------------------------- */
1389 static ssize_t version_show(struct device_driver *drv, char *buf)
1390 {
1391 	return sysfs_emit(buf, "%s v%s\n",
1392 			TPACPI_DESC, TPACPI_VERSION);
1393 }
1394 static DRIVER_ATTR_RO(version);
1395 
1396 /* --------------------------------------------------------------------- */
1397 
1398 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1399 
1400 /* wlsw_emulstate ------------------------------------------------------ */
1401 static ssize_t wlsw_emulstate_show(struct device_driver *drv, char *buf)
1402 {
1403 	return sysfs_emit(buf, "%d\n", !!tpacpi_wlsw_emulstate);
1404 }
1405 
1406 static ssize_t wlsw_emulstate_store(struct device_driver *drv, const char *buf,
1407 				    size_t count)
1408 {
1409 	unsigned long t;
1410 
1411 	if (parse_strtoul(buf, 1, &t))
1412 		return -EINVAL;
1413 
1414 	if (tpacpi_wlsw_emulstate != !!t) {
1415 		tpacpi_wlsw_emulstate = !!t;
1416 		tpacpi_rfk_update_hwblock_state(!t);	/* negative logic */
1417 	}
1418 
1419 	return count;
1420 }
1421 static DRIVER_ATTR_RW(wlsw_emulstate);
1422 
1423 /* bluetooth_emulstate ------------------------------------------------- */
1424 static ssize_t bluetooth_emulstate_show(struct device_driver *drv, char *buf)
1425 {
1426 	return sysfs_emit(buf, "%d\n", !!tpacpi_bluetooth_emulstate);
1427 }
1428 
1429 static ssize_t bluetooth_emulstate_store(struct device_driver *drv,
1430 					 const char *buf, size_t count)
1431 {
1432 	unsigned long t;
1433 
1434 	if (parse_strtoul(buf, 1, &t))
1435 		return -EINVAL;
1436 
1437 	tpacpi_bluetooth_emulstate = !!t;
1438 
1439 	return count;
1440 }
1441 static DRIVER_ATTR_RW(bluetooth_emulstate);
1442 
1443 /* wwan_emulstate ------------------------------------------------- */
1444 static ssize_t wwan_emulstate_show(struct device_driver *drv, char *buf)
1445 {
1446 	return sysfs_emit(buf, "%d\n", !!tpacpi_wwan_emulstate);
1447 }
1448 
1449 static ssize_t wwan_emulstate_store(struct device_driver *drv, const char *buf,
1450 				    size_t count)
1451 {
1452 	unsigned long t;
1453 
1454 	if (parse_strtoul(buf, 1, &t))
1455 		return -EINVAL;
1456 
1457 	tpacpi_wwan_emulstate = !!t;
1458 
1459 	return count;
1460 }
1461 static DRIVER_ATTR_RW(wwan_emulstate);
1462 
1463 /* uwb_emulstate ------------------------------------------------- */
1464 static ssize_t uwb_emulstate_show(struct device_driver *drv, char *buf)
1465 {
1466 	return sysfs_emit(buf, "%d\n", !!tpacpi_uwb_emulstate);
1467 }
1468 
1469 static ssize_t uwb_emulstate_store(struct device_driver *drv, const char *buf,
1470 				   size_t count)
1471 {
1472 	unsigned long t;
1473 
1474 	if (parse_strtoul(buf, 1, &t))
1475 		return -EINVAL;
1476 
1477 	tpacpi_uwb_emulstate = !!t;
1478 
1479 	return count;
1480 }
1481 static DRIVER_ATTR_RW(uwb_emulstate);
1482 #endif
1483 
1484 /*************************************************************************
1485  * Firmware Data
1486  */
1487 
1488 /*
1489  * Table of recommended minimum BIOS versions
1490  *
1491  * Reasons for listing:
1492  *    1. Stable BIOS, listed because the unknown amount of
1493  *       bugs and bad ACPI behaviour on older versions
1494  *
1495  *    2. BIOS or EC fw with known bugs that trigger on Linux
1496  *
1497  *    3. BIOS with known reduced functionality in older versions
1498  *
1499  *  We recommend the latest BIOS and EC version.
1500  *  We only support the latest BIOS and EC fw version as a rule.
1501  *
1502  *  Sources: IBM ThinkPad Public Web Documents (update changelogs),
1503  *  Information from users in ThinkWiki
1504  *
1505  *  WARNING: we use this table also to detect that the machine is
1506  *  a ThinkPad in some cases, so don't remove entries lightly.
1507  */
1508 
1509 #define TPV_Q(__v, __id1, __id2, __bv1, __bv2)		\
1510 	{ .vendor	= (__v),			\
1511 	  .bios		= TPID(__id1, __id2),		\
1512 	  .ec		= TPACPI_MATCH_ANY,		\
1513 	  .quirks	= TPACPI_MATCH_ANY_VERSION << 16 \
1514 			  | TPVER(__bv1, __bv2) }
1515 
1516 #define TPV_Q_X(__v, __bid1, __bid2, __bv1, __bv2,	\
1517 		__eid, __ev1, __ev2)			\
1518 	{ .vendor	= (__v),			\
1519 	  .bios		= TPID(__bid1, __bid2),		\
1520 	  .ec		= __eid,			\
1521 	  .quirks	= TPVER(__ev1, __ev2) << 16	\
1522 			  | TPVER(__bv1, __bv2) }
1523 
1524 #define TPV_QI0(__id1, __id2, __bv1, __bv2) \
1525 	TPV_Q(PCI_VENDOR_ID_IBM, __id1, __id2, __bv1, __bv2)
1526 
1527 /* Outdated IBM BIOSes often lack the EC id string */
1528 #define TPV_QI1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \
1529 	TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2, 	\
1530 		__bv1, __bv2, TPID(__id1, __id2),	\
1531 		__ev1, __ev2),				\
1532 	TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2, 	\
1533 		__bv1, __bv2, TPACPI_MATCH_UNKNOWN,	\
1534 		__ev1, __ev2)
1535 
1536 /* Outdated IBM BIOSes often lack the EC id string */
1537 #define TPV_QI2(__bid1, __bid2, __bv1, __bv2,		\
1538 		__eid1, __eid2, __ev1, __ev2) 		\
1539 	TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2, 	\
1540 		__bv1, __bv2, TPID(__eid1, __eid2),	\
1541 		__ev1, __ev2),				\
1542 	TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2, 	\
1543 		__bv1, __bv2, TPACPI_MATCH_UNKNOWN,	\
1544 		__ev1, __ev2)
1545 
1546 #define TPV_QL0(__id1, __id2, __bv1, __bv2) \
1547 	TPV_Q(PCI_VENDOR_ID_LENOVO, __id1, __id2, __bv1, __bv2)
1548 
1549 #define TPV_QL1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \
1550 	TPV_Q_X(PCI_VENDOR_ID_LENOVO, __id1, __id2, 	\
1551 		__bv1, __bv2, TPID(__id1, __id2),	\
1552 		__ev1, __ev2)
1553 
1554 #define TPV_QL2(__bid1, __bid2, __bv1, __bv2,		\
1555 		__eid1, __eid2, __ev1, __ev2) 		\
1556 	TPV_Q_X(PCI_VENDOR_ID_LENOVO, __bid1, __bid2, 	\
1557 		__bv1, __bv2, TPID(__eid1, __eid2),	\
1558 		__ev1, __ev2)
1559 
1560 static const struct tpacpi_quirk tpacpi_bios_version_qtable[] __initconst = {
1561 	/*  Numeric models ------------------ */
1562 	/*      FW MODEL   BIOS VERS	      */
1563 	TPV_QI0('I', 'M',  '6', '5'),		 /* 570 */
1564 	TPV_QI0('I', 'U',  '2', '6'),		 /* 570E */
1565 	TPV_QI0('I', 'B',  '5', '4'),		 /* 600 */
1566 	TPV_QI0('I', 'H',  '4', '7'),		 /* 600E */
1567 	TPV_QI0('I', 'N',  '3', '6'),		 /* 600E */
1568 	TPV_QI0('I', 'T',  '5', '5'),		 /* 600X */
1569 	TPV_QI0('I', 'D',  '4', '8'),		 /* 770, 770E, 770ED */
1570 	TPV_QI0('I', 'I',  '4', '2'),		 /* 770X */
1571 	TPV_QI0('I', 'O',  '2', '3'),		 /* 770Z */
1572 
1573 	/* A-series ------------------------- */
1574 	/*      FW MODEL   BIOS VERS  EC VERS */
1575 	TPV_QI0('I', 'W',  '5', '9'),		 /* A20m */
1576 	TPV_QI0('I', 'V',  '6', '9'),		 /* A20p */
1577 	TPV_QI0('1', '0',  '2', '6'),		 /* A21e, A22e */
1578 	TPV_QI0('K', 'U',  '3', '6'),		 /* A21e */
1579 	TPV_QI0('K', 'X',  '3', '6'),		 /* A21m, A22m */
1580 	TPV_QI0('K', 'Y',  '3', '8'),		 /* A21p, A22p */
1581 	TPV_QI0('1', 'B',  '1', '7'),		 /* A22e */
1582 	TPV_QI0('1', '3',  '2', '0'),		 /* A22m */
1583 	TPV_QI0('1', 'E',  '7', '3'),		 /* A30/p (0) */
1584 	TPV_QI1('1', 'G',  '4', '1',  '1', '7'), /* A31/p (0) */
1585 	TPV_QI1('1', 'N',  '1', '6',  '0', '7'), /* A31/p (0) */
1586 
1587 	/* G-series ------------------------- */
1588 	/*      FW MODEL   BIOS VERS	      */
1589 	TPV_QI0('1', 'T',  'A', '6'),		 /* G40 */
1590 	TPV_QI0('1', 'X',  '5', '7'),		 /* G41 */
1591 
1592 	/* R-series, T-series --------------- */
1593 	/*      FW MODEL   BIOS VERS  EC VERS */
1594 	TPV_QI0('1', 'C',  'F', '0'),		 /* R30 */
1595 	TPV_QI0('1', 'F',  'F', '1'),		 /* R31 */
1596 	TPV_QI0('1', 'M',  '9', '7'),		 /* R32 */
1597 	TPV_QI0('1', 'O',  '6', '1'),		 /* R40 */
1598 	TPV_QI0('1', 'P',  '6', '5'),		 /* R40 */
1599 	TPV_QI0('1', 'S',  '7', '0'),		 /* R40e */
1600 	TPV_QI1('1', 'R',  'D', 'R',  '7', '1'), /* R50/p, R51,
1601 						    T40/p, T41/p, T42/p (1) */
1602 	TPV_QI1('1', 'V',  '7', '1',  '2', '8'), /* R50e, R51 (1) */
1603 	TPV_QI1('7', '8',  '7', '1',  '0', '6'), /* R51e (1) */
1604 	TPV_QI1('7', '6',  '6', '9',  '1', '6'), /* R52 (1) */
1605 	TPV_QI1('7', '0',  '6', '9',  '2', '8'), /* R52, T43 (1) */
1606 
1607 	TPV_QI0('I', 'Y',  '6', '1'),		 /* T20 */
1608 	TPV_QI0('K', 'Z',  '3', '4'),		 /* T21 */
1609 	TPV_QI0('1', '6',  '3', '2'),		 /* T22 */
1610 	TPV_QI1('1', 'A',  '6', '4',  '2', '3'), /* T23 (0) */
1611 	TPV_QI1('1', 'I',  '7', '1',  '2', '0'), /* T30 (0) */
1612 	TPV_QI1('1', 'Y',  '6', '5',  '2', '9'), /* T43/p (1) */
1613 
1614 	TPV_QL1('7', '9',  'E', '3',  '5', '0'), /* T60/p */
1615 	TPV_QL1('7', 'C',  'D', '2',  '2', '2'), /* R60, R60i */
1616 	TPV_QL1('7', 'E',  'D', '0',  '1', '5'), /* R60e, R60i */
1617 
1618 	/*      BIOS FW    BIOS VERS  EC FW     EC VERS */
1619 	TPV_QI2('1', 'W',  '9', '0',  '1', 'V', '2', '8'), /* R50e (1) */
1620 	TPV_QL2('7', 'I',  '3', '4',  '7', '9', '5', '0'), /* T60/p wide */
1621 
1622 	/* X-series ------------------------- */
1623 	/*      FW MODEL   BIOS VERS  EC VERS */
1624 	TPV_QI0('I', 'Z',  '9', 'D'),		 /* X20, X21 */
1625 	TPV_QI0('1', 'D',  '7', '0'),		 /* X22, X23, X24 */
1626 	TPV_QI1('1', 'K',  '4', '8',  '1', '8'), /* X30 (0) */
1627 	TPV_QI1('1', 'Q',  '9', '7',  '2', '3'), /* X31, X32 (0) */
1628 	TPV_QI1('1', 'U',  'D', '3',  'B', '2'), /* X40 (0) */
1629 	TPV_QI1('7', '4',  '6', '4',  '2', '7'), /* X41 (0) */
1630 	TPV_QI1('7', '5',  '6', '0',  '2', '0'), /* X41t (0) */
1631 
1632 	TPV_QL1('7', 'B',  'D', '7',  '4', '0'), /* X60/s */
1633 	TPV_QL1('7', 'J',  '3', '0',  '1', '3'), /* X60t */
1634 
1635 	/* (0) - older versions lack DMI EC fw string and functionality */
1636 	/* (1) - older versions known to lack functionality */
1637 };
1638 
1639 #undef TPV_QL1
1640 #undef TPV_QL0
1641 #undef TPV_QI2
1642 #undef TPV_QI1
1643 #undef TPV_QI0
1644 #undef TPV_Q_X
1645 #undef TPV_Q
1646 
1647 static void __init tpacpi_check_outdated_fw(void)
1648 {
1649 	unsigned long fwvers;
1650 	u16 ec_version, bios_version;
1651 
1652 	fwvers = tpacpi_check_quirks(tpacpi_bios_version_qtable,
1653 				ARRAY_SIZE(tpacpi_bios_version_qtable));
1654 
1655 	if (!fwvers)
1656 		return;
1657 
1658 	bios_version = fwvers & 0xffffU;
1659 	ec_version = (fwvers >> 16) & 0xffffU;
1660 
1661 	/* note that unknown versions are set to 0x0000 and we use that */
1662 	if ((bios_version > thinkpad_id.bios_release) ||
1663 	    (ec_version > thinkpad_id.ec_release &&
1664 				ec_version != TPACPI_MATCH_ANY_VERSION)) {
1665 		/*
1666 		 * The changelogs would let us track down the exact
1667 		 * reason, but it is just too much of a pain to track
1668 		 * it.  We only list BIOSes that are either really
1669 		 * broken, or really stable to begin with, so it is
1670 		 * best if the user upgrades the firmware anyway.
1671 		 */
1672 		pr_warn("WARNING: Outdated ThinkPad BIOS/EC firmware\n");
1673 		pr_warn("WARNING: This firmware may be missing critical bug fixes and/or important features\n");
1674 	}
1675 }
1676 
1677 static bool __init tpacpi_is_fw_known(void)
1678 {
1679 	return tpacpi_check_quirks(tpacpi_bios_version_qtable,
1680 			ARRAY_SIZE(tpacpi_bios_version_qtable)) != 0;
1681 }
1682 
1683 /****************************************************************************
1684  ****************************************************************************
1685  *
1686  * Subdrivers
1687  *
1688  ****************************************************************************
1689  ****************************************************************************/
1690 
1691 /*************************************************************************
1692  * thinkpad-acpi metadata subdriver
1693  */
1694 
1695 static int thinkpad_acpi_driver_read(struct seq_file *m)
1696 {
1697 	seq_printf(m, "driver:\t\t%s\n", TPACPI_DESC);
1698 	seq_printf(m, "version:\t%s\n", TPACPI_VERSION);
1699 	return 0;
1700 }
1701 
1702 static struct ibm_struct thinkpad_acpi_driver_data = {
1703 	.name = "driver",
1704 	.read = thinkpad_acpi_driver_read,
1705 };
1706 
1707 /*************************************************************************
1708  * Hotkey subdriver
1709  */
1710 
1711 /*
1712  * ThinkPad firmware event model
1713  *
1714  * The ThinkPad firmware has two main event interfaces: normal ACPI
1715  * notifications (which follow the ACPI standard), and a private event
1716  * interface.
1717  *
1718  * The private event interface also issues events for the hotkeys.  As
1719  * the driver gained features, the event handling code ended up being
1720  * built around the hotkey subdriver.  This will need to be refactored
1721  * to a more formal event API eventually.
1722  *
1723  * Some "hotkeys" are actually supposed to be used as event reports,
1724  * such as "brightness has changed", "volume has changed", depending on
1725  * the ThinkPad model and how the firmware is operating.
1726  *
1727  * Unlike other classes, hotkey-class events have mask/unmask control on
1728  * non-ancient firmware.  However, how it behaves changes a lot with the
1729  * firmware model and version.
1730  */
1731 
1732 enum {	/* hot key scan codes (derived from ACPI DSDT) */
1733 	TP_ACPI_HOTKEYSCAN_FNF1		= 0,
1734 	TP_ACPI_HOTKEYSCAN_FNF2,
1735 	TP_ACPI_HOTKEYSCAN_FNF3,
1736 	TP_ACPI_HOTKEYSCAN_FNF4,
1737 	TP_ACPI_HOTKEYSCAN_FNF5,
1738 	TP_ACPI_HOTKEYSCAN_FNF6,
1739 	TP_ACPI_HOTKEYSCAN_FNF7,
1740 	TP_ACPI_HOTKEYSCAN_FNF8,
1741 	TP_ACPI_HOTKEYSCAN_FNF9,
1742 	TP_ACPI_HOTKEYSCAN_FNF10,
1743 	TP_ACPI_HOTKEYSCAN_FNF11,
1744 	TP_ACPI_HOTKEYSCAN_FNF12,
1745 	TP_ACPI_HOTKEYSCAN_FNBACKSPACE,
1746 	TP_ACPI_HOTKEYSCAN_FNINSERT,
1747 	TP_ACPI_HOTKEYSCAN_FNDELETE,
1748 	TP_ACPI_HOTKEYSCAN_FNHOME,
1749 	TP_ACPI_HOTKEYSCAN_FNEND,
1750 	TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1751 	TP_ACPI_HOTKEYSCAN_FNPAGEDOWN,
1752 	TP_ACPI_HOTKEYSCAN_FNSPACE,
1753 	TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1754 	TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1755 	TP_ACPI_HOTKEYSCAN_MUTE,
1756 	TP_ACPI_HOTKEYSCAN_THINKPAD,
1757 	TP_ACPI_HOTKEYSCAN_UNK1,
1758 	TP_ACPI_HOTKEYSCAN_UNK2,
1759 	TP_ACPI_HOTKEYSCAN_UNK3,
1760 	TP_ACPI_HOTKEYSCAN_UNK4,
1761 	TP_ACPI_HOTKEYSCAN_UNK5,
1762 	TP_ACPI_HOTKEYSCAN_UNK6,
1763 	TP_ACPI_HOTKEYSCAN_UNK7,
1764 	TP_ACPI_HOTKEYSCAN_UNK8,
1765 
1766 	/* Adaptive keyboard keycodes */
1767 	TP_ACPI_HOTKEYSCAN_ADAPTIVE_START,
1768 	TP_ACPI_HOTKEYSCAN_MUTE2        = TP_ACPI_HOTKEYSCAN_ADAPTIVE_START,
1769 	TP_ACPI_HOTKEYSCAN_BRIGHTNESS_ZERO,
1770 	TP_ACPI_HOTKEYSCAN_CLIPPING_TOOL,
1771 	TP_ACPI_HOTKEYSCAN_CLOUD,
1772 	TP_ACPI_HOTKEYSCAN_UNK9,
1773 	TP_ACPI_HOTKEYSCAN_VOICE,
1774 	TP_ACPI_HOTKEYSCAN_UNK10,
1775 	TP_ACPI_HOTKEYSCAN_GESTURES,
1776 	TP_ACPI_HOTKEYSCAN_UNK11,
1777 	TP_ACPI_HOTKEYSCAN_UNK12,
1778 	TP_ACPI_HOTKEYSCAN_UNK13,
1779 	TP_ACPI_HOTKEYSCAN_CONFIG,
1780 	TP_ACPI_HOTKEYSCAN_NEW_TAB,
1781 	TP_ACPI_HOTKEYSCAN_RELOAD,
1782 	TP_ACPI_HOTKEYSCAN_BACK,
1783 	TP_ACPI_HOTKEYSCAN_MIC_DOWN,
1784 	TP_ACPI_HOTKEYSCAN_MIC_UP,
1785 	TP_ACPI_HOTKEYSCAN_MIC_CANCELLATION,
1786 	TP_ACPI_HOTKEYSCAN_CAMERA_MODE,
1787 	TP_ACPI_HOTKEYSCAN_ROTATE_DISPLAY,
1788 
1789 	/* Lenovo extended keymap, starting at 0x1300 */
1790 	TP_ACPI_HOTKEYSCAN_EXTENDED_START,
1791 	/* first new observed key (star, favorites) is 0x1311 */
1792 	TP_ACPI_HOTKEYSCAN_STAR = 69,
1793 	TP_ACPI_HOTKEYSCAN_CLIPPING_TOOL2,
1794 	TP_ACPI_HOTKEYSCAN_CALCULATOR,
1795 	TP_ACPI_HOTKEYSCAN_BLUETOOTH,
1796 	TP_ACPI_HOTKEYSCAN_KEYBOARD,
1797 	TP_ACPI_HOTKEYSCAN_FN_RIGHT_SHIFT, /* Used by "Lenovo Quick Clean" */
1798 	TP_ACPI_HOTKEYSCAN_NOTIFICATION_CENTER,
1799 	TP_ACPI_HOTKEYSCAN_PICKUP_PHONE,
1800 	TP_ACPI_HOTKEYSCAN_HANGUP_PHONE,
1801 
1802 	/* Hotkey keymap size */
1803 	TPACPI_HOTKEY_MAP_LEN
1804 };
1805 
1806 enum {	/* Keys/events available through NVRAM polling */
1807 	TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U,
1808 	TPACPI_HKEY_NVRAM_GOOD_MASK  = 0x00fb8000U,
1809 };
1810 
1811 enum {	/* Positions of some of the keys in hotkey masks */
1812 	TP_ACPI_HKEY_DISPSWTCH_MASK	= 1 << TP_ACPI_HOTKEYSCAN_FNF7,
1813 	TP_ACPI_HKEY_DISPXPAND_MASK	= 1 << TP_ACPI_HOTKEYSCAN_FNF8,
1814 	TP_ACPI_HKEY_HIBERNATE_MASK	= 1 << TP_ACPI_HOTKEYSCAN_FNF12,
1815 	TP_ACPI_HKEY_BRGHTUP_MASK	= 1 << TP_ACPI_HOTKEYSCAN_FNHOME,
1816 	TP_ACPI_HKEY_BRGHTDWN_MASK	= 1 << TP_ACPI_HOTKEYSCAN_FNEND,
1817 	TP_ACPI_HKEY_KBD_LIGHT_MASK	= 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1818 	TP_ACPI_HKEY_ZOOM_MASK		= 1 << TP_ACPI_HOTKEYSCAN_FNSPACE,
1819 	TP_ACPI_HKEY_VOLUP_MASK		= 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1820 	TP_ACPI_HKEY_VOLDWN_MASK	= 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1821 	TP_ACPI_HKEY_MUTE_MASK		= 1 << TP_ACPI_HOTKEYSCAN_MUTE,
1822 	TP_ACPI_HKEY_THINKPAD_MASK	= 1 << TP_ACPI_HOTKEYSCAN_THINKPAD,
1823 };
1824 
1825 enum {	/* NVRAM to ACPI HKEY group map */
1826 	TP_NVRAM_HKEY_GROUP_HK2		= TP_ACPI_HKEY_THINKPAD_MASK |
1827 					  TP_ACPI_HKEY_ZOOM_MASK |
1828 					  TP_ACPI_HKEY_DISPSWTCH_MASK |
1829 					  TP_ACPI_HKEY_HIBERNATE_MASK,
1830 	TP_NVRAM_HKEY_GROUP_BRIGHTNESS	= TP_ACPI_HKEY_BRGHTUP_MASK |
1831 					  TP_ACPI_HKEY_BRGHTDWN_MASK,
1832 	TP_NVRAM_HKEY_GROUP_VOLUME	= TP_ACPI_HKEY_VOLUP_MASK |
1833 					  TP_ACPI_HKEY_VOLDWN_MASK |
1834 					  TP_ACPI_HKEY_MUTE_MASK,
1835 };
1836 
1837 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1838 struct tp_nvram_state {
1839        u16 thinkpad_toggle:1;
1840        u16 zoom_toggle:1;
1841        u16 display_toggle:1;
1842        u16 thinklight_toggle:1;
1843        u16 hibernate_toggle:1;
1844        u16 displayexp_toggle:1;
1845        u16 display_state:1;
1846        u16 brightness_toggle:1;
1847        u16 volume_toggle:1;
1848        u16 mute:1;
1849 
1850        u8 brightness_level;
1851        u8 volume_level;
1852 };
1853 
1854 /* kthread for the hotkey poller */
1855 static struct task_struct *tpacpi_hotkey_task;
1856 
1857 /*
1858  * Acquire mutex to write poller control variables as an
1859  * atomic block.
1860  *
1861  * Increment hotkey_config_change when changing them if you
1862  * want the kthread to forget old state.
1863  *
1864  * See HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END
1865  */
1866 static struct mutex hotkey_thread_data_mutex;
1867 static unsigned int hotkey_config_change;
1868 
1869 /*
1870  * hotkey poller control variables
1871  *
1872  * Must be atomic or readers will also need to acquire mutex
1873  *
1874  * HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END
1875  * should be used only when the changes need to be taken as
1876  * a block, OR when one needs to force the kthread to forget
1877  * old state.
1878  */
1879 static u32 hotkey_source_mask;		/* bit mask 0=ACPI,1=NVRAM */
1880 static unsigned int hotkey_poll_freq = 10; /* Hz */
1881 
1882 #define HOTKEY_CONFIG_CRITICAL_START \
1883 	do { \
1884 		mutex_lock(&hotkey_thread_data_mutex); \
1885 		hotkey_config_change++; \
1886 	} while (0);
1887 #define HOTKEY_CONFIG_CRITICAL_END \
1888 	mutex_unlock(&hotkey_thread_data_mutex);
1889 
1890 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1891 
1892 #define hotkey_source_mask 0U
1893 #define HOTKEY_CONFIG_CRITICAL_START
1894 #define HOTKEY_CONFIG_CRITICAL_END
1895 
1896 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1897 
1898 static struct mutex hotkey_mutex;
1899 
1900 static enum {	/* Reasons for waking up */
1901 	TP_ACPI_WAKEUP_NONE = 0,	/* None or unknown */
1902 	TP_ACPI_WAKEUP_BAYEJ,		/* Bay ejection request */
1903 	TP_ACPI_WAKEUP_UNDOCK,		/* Undock request */
1904 } hotkey_wakeup_reason;
1905 
1906 static int hotkey_autosleep_ack;
1907 
1908 static u32 hotkey_orig_mask;		/* events the BIOS had enabled */
1909 static u32 hotkey_all_mask;		/* all events supported in fw */
1910 static u32 hotkey_adaptive_all_mask;	/* all adaptive events supported in fw */
1911 static u32 hotkey_reserved_mask;	/* events better left disabled */
1912 static u32 hotkey_driver_mask;		/* events needed by the driver */
1913 static u32 hotkey_user_mask;		/* events visible to userspace */
1914 static u32 hotkey_acpi_mask;		/* events enabled in firmware */
1915 
1916 static u16 *hotkey_keycode_map;
1917 
1918 static void tpacpi_driver_event(const unsigned int hkey_event);
1919 static void hotkey_driver_event(const unsigned int scancode);
1920 static void hotkey_poll_setup(const bool may_warn);
1921 
1922 /* HKEY.MHKG() return bits */
1923 #define TP_HOTKEY_TABLET_MASK (1 << 3)
1924 enum {
1925 	TP_ACPI_MULTI_MODE_INVALID	= 0,
1926 	TP_ACPI_MULTI_MODE_UNKNOWN	= 1 << 0,
1927 	TP_ACPI_MULTI_MODE_LAPTOP	= 1 << 1,
1928 	TP_ACPI_MULTI_MODE_TABLET	= 1 << 2,
1929 	TP_ACPI_MULTI_MODE_FLAT		= 1 << 3,
1930 	TP_ACPI_MULTI_MODE_STAND	= 1 << 4,
1931 	TP_ACPI_MULTI_MODE_TENT		= 1 << 5,
1932 	TP_ACPI_MULTI_MODE_STAND_TENT	= 1 << 6,
1933 };
1934 
1935 enum {
1936 	/* The following modes are considered tablet mode for the purpose of
1937 	 * reporting the status to userspace. i.e. in all these modes it makes
1938 	 * sense to disable the laptop input devices such as touchpad and
1939 	 * keyboard.
1940 	 */
1941 	TP_ACPI_MULTI_MODE_TABLET_LIKE	= TP_ACPI_MULTI_MODE_TABLET |
1942 					  TP_ACPI_MULTI_MODE_STAND |
1943 					  TP_ACPI_MULTI_MODE_TENT |
1944 					  TP_ACPI_MULTI_MODE_STAND_TENT,
1945 };
1946 
1947 static int hotkey_get_wlsw(void)
1948 {
1949 	int status;
1950 
1951 	if (!tp_features.hotkey_wlsw)
1952 		return -ENODEV;
1953 
1954 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1955 	if (dbg_wlswemul)
1956 		return (tpacpi_wlsw_emulstate) ?
1957 				TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
1958 #endif
1959 
1960 	if (!acpi_evalf(hkey_handle, &status, "WLSW", "d"))
1961 		return -EIO;
1962 
1963 	return (status) ? TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
1964 }
1965 
1966 static int hotkey_gmms_get_tablet_mode(int s, int *has_tablet_mode)
1967 {
1968 	int type = (s >> 16) & 0xffff;
1969 	int value = s & 0xffff;
1970 	int mode = TP_ACPI_MULTI_MODE_INVALID;
1971 	int valid_modes = 0;
1972 
1973 	if (has_tablet_mode)
1974 		*has_tablet_mode = 0;
1975 
1976 	switch (type) {
1977 	case 1:
1978 		valid_modes = TP_ACPI_MULTI_MODE_LAPTOP |
1979 			      TP_ACPI_MULTI_MODE_TABLET |
1980 			      TP_ACPI_MULTI_MODE_STAND_TENT;
1981 		break;
1982 	case 2:
1983 		valid_modes = TP_ACPI_MULTI_MODE_LAPTOP |
1984 			      TP_ACPI_MULTI_MODE_FLAT |
1985 			      TP_ACPI_MULTI_MODE_TABLET |
1986 			      TP_ACPI_MULTI_MODE_STAND |
1987 			      TP_ACPI_MULTI_MODE_TENT;
1988 		break;
1989 	case 3:
1990 		valid_modes = TP_ACPI_MULTI_MODE_LAPTOP |
1991 			      TP_ACPI_MULTI_MODE_FLAT;
1992 		break;
1993 	case 4:
1994 	case 5:
1995 		/* In mode 4, FLAT is not specified as a valid mode. However,
1996 		 * it can be seen at least on the X1 Yoga 2nd Generation.
1997 		 */
1998 		valid_modes = TP_ACPI_MULTI_MODE_LAPTOP |
1999 			      TP_ACPI_MULTI_MODE_FLAT |
2000 			      TP_ACPI_MULTI_MODE_TABLET |
2001 			      TP_ACPI_MULTI_MODE_STAND |
2002 			      TP_ACPI_MULTI_MODE_TENT;
2003 		break;
2004 	default:
2005 		pr_err("Unknown multi mode status type %d with value 0x%04X, please report this to %s\n",
2006 		       type, value, TPACPI_MAIL);
2007 		return 0;
2008 	}
2009 
2010 	if (has_tablet_mode && (valid_modes & TP_ACPI_MULTI_MODE_TABLET_LIKE))
2011 		*has_tablet_mode = 1;
2012 
2013 	switch (value) {
2014 	case 1:
2015 		mode = TP_ACPI_MULTI_MODE_LAPTOP;
2016 		break;
2017 	case 2:
2018 		mode = TP_ACPI_MULTI_MODE_FLAT;
2019 		break;
2020 	case 3:
2021 		mode = TP_ACPI_MULTI_MODE_TABLET;
2022 		break;
2023 	case 4:
2024 		if (type == 1)
2025 			mode = TP_ACPI_MULTI_MODE_STAND_TENT;
2026 		else
2027 			mode = TP_ACPI_MULTI_MODE_STAND;
2028 		break;
2029 	case 5:
2030 		mode = TP_ACPI_MULTI_MODE_TENT;
2031 		break;
2032 	default:
2033 		if (type == 5 && value == 0xffff) {
2034 			pr_warn("Multi mode status is undetected, assuming laptop\n");
2035 			return 0;
2036 		}
2037 	}
2038 
2039 	if (!(mode & valid_modes)) {
2040 		pr_err("Unknown/reserved multi mode value 0x%04X for type %d, please report this to %s\n",
2041 		       value, type, TPACPI_MAIL);
2042 		return 0;
2043 	}
2044 
2045 	return !!(mode & TP_ACPI_MULTI_MODE_TABLET_LIKE);
2046 }
2047 
2048 static int hotkey_get_tablet_mode(int *status)
2049 {
2050 	int s;
2051 
2052 	switch (tp_features.hotkey_tablet) {
2053 	case TP_HOTKEY_TABLET_USES_MHKG:
2054 		if (!acpi_evalf(hkey_handle, &s, "MHKG", "d"))
2055 			return -EIO;
2056 
2057 		*status = ((s & TP_HOTKEY_TABLET_MASK) != 0);
2058 		break;
2059 	case TP_HOTKEY_TABLET_USES_GMMS:
2060 		if (!acpi_evalf(hkey_handle, &s, "GMMS", "dd", 0))
2061 			return -EIO;
2062 
2063 		*status = hotkey_gmms_get_tablet_mode(s, NULL);
2064 		break;
2065 	default:
2066 		break;
2067 	}
2068 
2069 	return 0;
2070 }
2071 
2072 /*
2073  * Reads current event mask from firmware, and updates
2074  * hotkey_acpi_mask accordingly.  Also resets any bits
2075  * from hotkey_user_mask that are unavailable to be
2076  * delivered (shadow requirement of the userspace ABI).
2077  *
2078  * Call with hotkey_mutex held
2079  */
2080 static int hotkey_mask_get(void)
2081 {
2082 	if (tp_features.hotkey_mask) {
2083 		u32 m = 0;
2084 
2085 		if (!acpi_evalf(hkey_handle, &m, "DHKN", "d"))
2086 			return -EIO;
2087 
2088 		hotkey_acpi_mask = m;
2089 	} else {
2090 		/* no mask support doesn't mean no event support... */
2091 		hotkey_acpi_mask = hotkey_all_mask;
2092 	}
2093 
2094 	/* sync userspace-visible mask */
2095 	hotkey_user_mask &= (hotkey_acpi_mask | hotkey_source_mask);
2096 
2097 	return 0;
2098 }
2099 
2100 static void hotkey_mask_warn_incomplete_mask(void)
2101 {
2102 	/* log only what the user can fix... */
2103 	const u32 wantedmask = hotkey_driver_mask &
2104 		~(hotkey_acpi_mask | hotkey_source_mask) &
2105 		(hotkey_all_mask | TPACPI_HKEY_NVRAM_KNOWN_MASK);
2106 
2107 	if (wantedmask)
2108 		pr_notice("required events 0x%08x not enabled!\n", wantedmask);
2109 }
2110 
2111 /*
2112  * Set the firmware mask when supported
2113  *
2114  * Also calls hotkey_mask_get to update hotkey_acpi_mask.
2115  *
2116  * NOTE: does not set bits in hotkey_user_mask, but may reset them.
2117  *
2118  * Call with hotkey_mutex held
2119  */
2120 static int hotkey_mask_set(u32 mask)
2121 {
2122 	int i;
2123 	int rc = 0;
2124 
2125 	const u32 fwmask = mask & ~hotkey_source_mask;
2126 
2127 	if (tp_features.hotkey_mask) {
2128 		for (i = 0; i < 32; i++) {
2129 			if (!acpi_evalf(hkey_handle,
2130 					NULL, "MHKM", "vdd", i + 1,
2131 					!!(mask & (1 << i)))) {
2132 				rc = -EIO;
2133 				break;
2134 			}
2135 		}
2136 	}
2137 
2138 	/*
2139 	 * We *must* make an inconditional call to hotkey_mask_get to
2140 	 * refresh hotkey_acpi_mask and update hotkey_user_mask
2141 	 *
2142 	 * Take the opportunity to also log when we cannot _enable_
2143 	 * a given event.
2144 	 */
2145 	if (!hotkey_mask_get() && !rc && (fwmask & ~hotkey_acpi_mask)) {
2146 		pr_notice("asked for hotkey mask 0x%08x, but firmware forced it to 0x%08x\n",
2147 			  fwmask, hotkey_acpi_mask);
2148 	}
2149 
2150 	if (tpacpi_lifecycle != TPACPI_LIFE_EXITING)
2151 		hotkey_mask_warn_incomplete_mask();
2152 
2153 	return rc;
2154 }
2155 
2156 /*
2157  * Sets hotkey_user_mask and tries to set the firmware mask
2158  *
2159  * Call with hotkey_mutex held
2160  */
2161 static int hotkey_user_mask_set(const u32 mask)
2162 {
2163 	int rc;
2164 
2165 	/* Give people a chance to notice they are doing something that
2166 	 * is bound to go boom on their users sooner or later */
2167 	if (!tp_warned.hotkey_mask_ff &&
2168 	    (mask == 0xffff || mask == 0xffffff ||
2169 	     mask == 0xffffffff)) {
2170 		tp_warned.hotkey_mask_ff = 1;
2171 		pr_notice("setting the hotkey mask to 0x%08x is likely not the best way to go about it\n",
2172 			  mask);
2173 		pr_notice("please consider using the driver defaults, and refer to up-to-date thinkpad-acpi documentation\n");
2174 	}
2175 
2176 	/* Try to enable what the user asked for, plus whatever we need.
2177 	 * this syncs everything but won't enable bits in hotkey_user_mask */
2178 	rc = hotkey_mask_set((mask | hotkey_driver_mask) & ~hotkey_source_mask);
2179 
2180 	/* Enable the available bits in hotkey_user_mask */
2181 	hotkey_user_mask = mask & (hotkey_acpi_mask | hotkey_source_mask);
2182 
2183 	return rc;
2184 }
2185 
2186 /*
2187  * Sets the driver hotkey mask.
2188  *
2189  * Can be called even if the hotkey subdriver is inactive
2190  */
2191 static int tpacpi_hotkey_driver_mask_set(const u32 mask)
2192 {
2193 	int rc;
2194 
2195 	/* Do the right thing if hotkey_init has not been called yet */
2196 	if (!tp_features.hotkey) {
2197 		hotkey_driver_mask = mask;
2198 		return 0;
2199 	}
2200 
2201 	mutex_lock(&hotkey_mutex);
2202 
2203 	HOTKEY_CONFIG_CRITICAL_START
2204 	hotkey_driver_mask = mask;
2205 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2206 	hotkey_source_mask |= (mask & ~hotkey_all_mask);
2207 #endif
2208 	HOTKEY_CONFIG_CRITICAL_END
2209 
2210 	rc = hotkey_mask_set((hotkey_acpi_mask | hotkey_driver_mask) &
2211 							~hotkey_source_mask);
2212 	hotkey_poll_setup(true);
2213 
2214 	mutex_unlock(&hotkey_mutex);
2215 
2216 	return rc;
2217 }
2218 
2219 static int hotkey_status_get(int *status)
2220 {
2221 	if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
2222 		return -EIO;
2223 
2224 	return 0;
2225 }
2226 
2227 static int hotkey_status_set(bool enable)
2228 {
2229 	if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", enable ? 1 : 0))
2230 		return -EIO;
2231 
2232 	return 0;
2233 }
2234 
2235 static void tpacpi_input_send_tabletsw(void)
2236 {
2237 	int state;
2238 
2239 	if (tp_features.hotkey_tablet &&
2240 	    !hotkey_get_tablet_mode(&state)) {
2241 		mutex_lock(&tpacpi_inputdev_send_mutex);
2242 
2243 		input_report_switch(tpacpi_inputdev,
2244 				    SW_TABLET_MODE, !!state);
2245 		input_sync(tpacpi_inputdev);
2246 
2247 		mutex_unlock(&tpacpi_inputdev_send_mutex);
2248 	}
2249 }
2250 
2251 /* Do NOT call without validating scancode first */
2252 static void tpacpi_input_send_key(const unsigned int scancode)
2253 {
2254 	const unsigned int keycode = hotkey_keycode_map[scancode];
2255 
2256 	if (keycode != KEY_RESERVED) {
2257 		mutex_lock(&tpacpi_inputdev_send_mutex);
2258 
2259 		input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN, scancode);
2260 		input_report_key(tpacpi_inputdev, keycode, 1);
2261 		input_sync(tpacpi_inputdev);
2262 
2263 		input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN, scancode);
2264 		input_report_key(tpacpi_inputdev, keycode, 0);
2265 		input_sync(tpacpi_inputdev);
2266 
2267 		mutex_unlock(&tpacpi_inputdev_send_mutex);
2268 	}
2269 }
2270 
2271 /* Do NOT call without validating scancode first */
2272 static void tpacpi_input_send_key_masked(const unsigned int scancode)
2273 {
2274 	hotkey_driver_event(scancode);
2275 	if (hotkey_user_mask & (1 << scancode))
2276 		tpacpi_input_send_key(scancode);
2277 }
2278 
2279 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2280 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver;
2281 
2282 /* Do NOT call without validating scancode first */
2283 static void tpacpi_hotkey_send_key(unsigned int scancode)
2284 {
2285 	tpacpi_input_send_key_masked(scancode);
2286 }
2287 
2288 static void hotkey_read_nvram(struct tp_nvram_state *n, const u32 m)
2289 {
2290 	u8 d;
2291 
2292 	if (m & TP_NVRAM_HKEY_GROUP_HK2) {
2293 		d = nvram_read_byte(TP_NVRAM_ADDR_HK2);
2294 		n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD);
2295 		n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM);
2296 		n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY);
2297 		n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE);
2298 	}
2299 	if (m & TP_ACPI_HKEY_KBD_LIGHT_MASK) {
2300 		d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT);
2301 		n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT);
2302 	}
2303 	if (m & TP_ACPI_HKEY_DISPXPAND_MASK) {
2304 		d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO);
2305 		n->displayexp_toggle =
2306 				!!(d & TP_NVRAM_MASK_HKT_DISPEXPND);
2307 	}
2308 	if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) {
2309 		d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
2310 		n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
2311 				>> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
2312 		n->brightness_toggle =
2313 				!!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS);
2314 	}
2315 	if (m & TP_NVRAM_HKEY_GROUP_VOLUME) {
2316 		d = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
2317 		n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME)
2318 				>> TP_NVRAM_POS_LEVEL_VOLUME;
2319 		n->mute = !!(d & TP_NVRAM_MASK_MUTE);
2320 		n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME);
2321 	}
2322 }
2323 
2324 #define TPACPI_COMPARE_KEY(__scancode, __member) \
2325 do { \
2326 	if ((event_mask & (1 << __scancode)) && \
2327 	    oldn->__member != newn->__member) \
2328 		tpacpi_hotkey_send_key(__scancode); \
2329 } while (0)
2330 
2331 #define TPACPI_MAY_SEND_KEY(__scancode) \
2332 do { \
2333 	if (event_mask & (1 << __scancode)) \
2334 		tpacpi_hotkey_send_key(__scancode); \
2335 } while (0)
2336 
2337 static void issue_volchange(const unsigned int oldvol,
2338 			    const unsigned int newvol,
2339 			    const u32 event_mask)
2340 {
2341 	unsigned int i = oldvol;
2342 
2343 	while (i > newvol) {
2344 		TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
2345 		i--;
2346 	}
2347 	while (i < newvol) {
2348 		TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2349 		i++;
2350 	}
2351 }
2352 
2353 static void issue_brightnesschange(const unsigned int oldbrt,
2354 				   const unsigned int newbrt,
2355 				   const u32 event_mask)
2356 {
2357 	unsigned int i = oldbrt;
2358 
2359 	while (i > newbrt) {
2360 		TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2361 		i--;
2362 	}
2363 	while (i < newbrt) {
2364 		TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2365 		i++;
2366 	}
2367 }
2368 
2369 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn,
2370 					   struct tp_nvram_state *newn,
2371 					   const u32 event_mask)
2372 {
2373 
2374 	TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle);
2375 	TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle);
2376 	TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle);
2377 	TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle);
2378 
2379 	TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle);
2380 
2381 	TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle);
2382 
2383 	/*
2384 	 * Handle volume
2385 	 *
2386 	 * This code is supposed to duplicate the IBM firmware behaviour:
2387 	 * - Pressing MUTE issues mute hotkey message, even when already mute
2388 	 * - Pressing Volume up/down issues volume up/down hotkey messages,
2389 	 *   even when already at maximum or minimum volume
2390 	 * - The act of unmuting issues volume up/down notification,
2391 	 *   depending which key was used to unmute
2392 	 *
2393 	 * We are constrained to what the NVRAM can tell us, which is not much
2394 	 * and certainly not enough if more than one volume hotkey was pressed
2395 	 * since the last poll cycle.
2396 	 *
2397 	 * Just to make our life interesting, some newer Lenovo ThinkPads have
2398 	 * bugs in the BIOS and may fail to update volume_toggle properly.
2399 	 */
2400 	if (newn->mute) {
2401 		/* muted */
2402 		if (!oldn->mute ||
2403 		    oldn->volume_toggle != newn->volume_toggle ||
2404 		    oldn->volume_level != newn->volume_level) {
2405 			/* recently muted, or repeated mute keypress, or
2406 			 * multiple presses ending in mute */
2407 			issue_volchange(oldn->volume_level, newn->volume_level,
2408 				event_mask);
2409 			TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
2410 		}
2411 	} else {
2412 		/* unmute */
2413 		if (oldn->mute) {
2414 			/* recently unmuted, issue 'unmute' keypress */
2415 			TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2416 		}
2417 		if (oldn->volume_level != newn->volume_level) {
2418 			issue_volchange(oldn->volume_level, newn->volume_level,
2419 				event_mask);
2420 		} else if (oldn->volume_toggle != newn->volume_toggle) {
2421 			/* repeated vol up/down keypress at end of scale ? */
2422 			if (newn->volume_level == 0)
2423 				TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
2424 			else if (newn->volume_level >= TP_NVRAM_LEVEL_VOLUME_MAX)
2425 				TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2426 		}
2427 	}
2428 
2429 	/* handle brightness */
2430 	if (oldn->brightness_level != newn->brightness_level) {
2431 		issue_brightnesschange(oldn->brightness_level,
2432 				       newn->brightness_level, event_mask);
2433 	} else if (oldn->brightness_toggle != newn->brightness_toggle) {
2434 		/* repeated key presses that didn't change state */
2435 		if (newn->brightness_level == 0)
2436 			TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2437 		else if (newn->brightness_level >= bright_maxlvl
2438 				&& !tp_features.bright_unkfw)
2439 			TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2440 	}
2441 
2442 #undef TPACPI_COMPARE_KEY
2443 #undef TPACPI_MAY_SEND_KEY
2444 }
2445 
2446 /*
2447  * Polling driver
2448  *
2449  * We track all events in hotkey_source_mask all the time, since
2450  * most of them are edge-based.  We only issue those requested by
2451  * hotkey_user_mask or hotkey_driver_mask, though.
2452  */
2453 static int hotkey_kthread(void *data)
2454 {
2455 	struct tp_nvram_state s[2] = { 0 };
2456 	u32 poll_mask, event_mask;
2457 	unsigned int si, so;
2458 	unsigned long t;
2459 	unsigned int change_detector;
2460 	unsigned int poll_freq;
2461 	bool was_frozen;
2462 
2463 	if (tpacpi_lifecycle == TPACPI_LIFE_EXITING)
2464 		goto exit;
2465 
2466 	set_freezable();
2467 
2468 	so = 0;
2469 	si = 1;
2470 	t = 0;
2471 
2472 	/* Initial state for compares */
2473 	mutex_lock(&hotkey_thread_data_mutex);
2474 	change_detector = hotkey_config_change;
2475 	poll_mask = hotkey_source_mask;
2476 	event_mask = hotkey_source_mask &
2477 			(hotkey_driver_mask | hotkey_user_mask);
2478 	poll_freq = hotkey_poll_freq;
2479 	mutex_unlock(&hotkey_thread_data_mutex);
2480 	hotkey_read_nvram(&s[so], poll_mask);
2481 
2482 	while (!kthread_should_stop()) {
2483 		if (t == 0) {
2484 			if (likely(poll_freq))
2485 				t = 1000/poll_freq;
2486 			else
2487 				t = 100;	/* should never happen... */
2488 		}
2489 		t = msleep_interruptible(t);
2490 		if (unlikely(kthread_freezable_should_stop(&was_frozen)))
2491 			break;
2492 
2493 		if (t > 0 && !was_frozen)
2494 			continue;
2495 
2496 		mutex_lock(&hotkey_thread_data_mutex);
2497 		if (was_frozen || hotkey_config_change != change_detector) {
2498 			/* forget old state on thaw or config change */
2499 			si = so;
2500 			t = 0;
2501 			change_detector = hotkey_config_change;
2502 		}
2503 		poll_mask = hotkey_source_mask;
2504 		event_mask = hotkey_source_mask &
2505 				(hotkey_driver_mask | hotkey_user_mask);
2506 		poll_freq = hotkey_poll_freq;
2507 		mutex_unlock(&hotkey_thread_data_mutex);
2508 
2509 		if (likely(poll_mask)) {
2510 			hotkey_read_nvram(&s[si], poll_mask);
2511 			if (likely(si != so)) {
2512 				hotkey_compare_and_issue_event(&s[so], &s[si],
2513 								event_mask);
2514 			}
2515 		}
2516 
2517 		so = si;
2518 		si ^= 1;
2519 	}
2520 
2521 exit:
2522 	return 0;
2523 }
2524 
2525 /* call with hotkey_mutex held */
2526 static void hotkey_poll_stop_sync(void)
2527 {
2528 	if (tpacpi_hotkey_task) {
2529 		kthread_stop(tpacpi_hotkey_task);
2530 		tpacpi_hotkey_task = NULL;
2531 	}
2532 }
2533 
2534 /* call with hotkey_mutex held */
2535 static void hotkey_poll_setup(const bool may_warn)
2536 {
2537 	const u32 poll_driver_mask = hotkey_driver_mask & hotkey_source_mask;
2538 	const u32 poll_user_mask = hotkey_user_mask & hotkey_source_mask;
2539 
2540 	if (hotkey_poll_freq > 0 &&
2541 	    (poll_driver_mask ||
2542 	     (poll_user_mask && tpacpi_inputdev->users > 0))) {
2543 		if (!tpacpi_hotkey_task) {
2544 			tpacpi_hotkey_task = kthread_run(hotkey_kthread,
2545 					NULL, TPACPI_NVRAM_KTHREAD_NAME);
2546 			if (IS_ERR(tpacpi_hotkey_task)) {
2547 				tpacpi_hotkey_task = NULL;
2548 				pr_err("could not create kernel thread for hotkey polling\n");
2549 			}
2550 		}
2551 	} else {
2552 		hotkey_poll_stop_sync();
2553 		if (may_warn && (poll_driver_mask || poll_user_mask) &&
2554 		    hotkey_poll_freq == 0) {
2555 			pr_notice("hot keys 0x%08x and/or events 0x%08x require polling, which is currently disabled\n",
2556 				  poll_user_mask, poll_driver_mask);
2557 		}
2558 	}
2559 }
2560 
2561 static void hotkey_poll_setup_safe(const bool may_warn)
2562 {
2563 	mutex_lock(&hotkey_mutex);
2564 	hotkey_poll_setup(may_warn);
2565 	mutex_unlock(&hotkey_mutex);
2566 }
2567 
2568 /* call with hotkey_mutex held */
2569 static void hotkey_poll_set_freq(unsigned int freq)
2570 {
2571 	if (!freq)
2572 		hotkey_poll_stop_sync();
2573 
2574 	hotkey_poll_freq = freq;
2575 }
2576 
2577 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2578 
2579 static void hotkey_poll_setup(const bool __unused)
2580 {
2581 }
2582 
2583 static void hotkey_poll_setup_safe(const bool __unused)
2584 {
2585 }
2586 
2587 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2588 
2589 static int hotkey_inputdev_open(struct input_dev *dev)
2590 {
2591 	switch (tpacpi_lifecycle) {
2592 	case TPACPI_LIFE_INIT:
2593 	case TPACPI_LIFE_RUNNING:
2594 		hotkey_poll_setup_safe(false);
2595 		return 0;
2596 	case TPACPI_LIFE_EXITING:
2597 		return -EBUSY;
2598 	}
2599 
2600 	/* Should only happen if tpacpi_lifecycle is corrupt */
2601 	BUG();
2602 	return -EBUSY;
2603 }
2604 
2605 static void hotkey_inputdev_close(struct input_dev *dev)
2606 {
2607 	/* disable hotkey polling when possible */
2608 	if (tpacpi_lifecycle != TPACPI_LIFE_EXITING &&
2609 	    !(hotkey_source_mask & hotkey_driver_mask))
2610 		hotkey_poll_setup_safe(false);
2611 }
2612 
2613 /* sysfs hotkey enable ------------------------------------------------- */
2614 static ssize_t hotkey_enable_show(struct device *dev,
2615 			   struct device_attribute *attr,
2616 			   char *buf)
2617 {
2618 	int res, status;
2619 
2620 	printk_deprecated_attribute("hotkey_enable",
2621 			"Hotkey reporting is always enabled");
2622 
2623 	res = hotkey_status_get(&status);
2624 	if (res)
2625 		return res;
2626 
2627 	return sysfs_emit(buf, "%d\n", status);
2628 }
2629 
2630 static ssize_t hotkey_enable_store(struct device *dev,
2631 			    struct device_attribute *attr,
2632 			    const char *buf, size_t count)
2633 {
2634 	unsigned long t;
2635 
2636 	printk_deprecated_attribute("hotkey_enable",
2637 			"Hotkeys can be disabled through hotkey_mask");
2638 
2639 	if (parse_strtoul(buf, 1, &t))
2640 		return -EINVAL;
2641 
2642 	if (t == 0)
2643 		return -EPERM;
2644 
2645 	return count;
2646 }
2647 
2648 static DEVICE_ATTR_RW(hotkey_enable);
2649 
2650 /* sysfs hotkey mask --------------------------------------------------- */
2651 static ssize_t hotkey_mask_show(struct device *dev,
2652 			   struct device_attribute *attr,
2653 			   char *buf)
2654 {
2655 	return sysfs_emit(buf, "0x%08x\n", hotkey_user_mask);
2656 }
2657 
2658 static ssize_t hotkey_mask_store(struct device *dev,
2659 			    struct device_attribute *attr,
2660 			    const char *buf, size_t count)
2661 {
2662 	unsigned long t;
2663 	int res;
2664 
2665 	if (parse_strtoul(buf, 0xffffffffUL, &t))
2666 		return -EINVAL;
2667 
2668 	if (mutex_lock_killable(&hotkey_mutex))
2669 		return -ERESTARTSYS;
2670 
2671 	res = hotkey_user_mask_set(t);
2672 
2673 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2674 	hotkey_poll_setup(true);
2675 #endif
2676 
2677 	mutex_unlock(&hotkey_mutex);
2678 
2679 	tpacpi_disclose_usertask("hotkey_mask", "set to 0x%08lx\n", t);
2680 
2681 	return (res) ? res : count;
2682 }
2683 
2684 static DEVICE_ATTR_RW(hotkey_mask);
2685 
2686 /* sysfs hotkey bios_enabled ------------------------------------------- */
2687 static ssize_t hotkey_bios_enabled_show(struct device *dev,
2688 			   struct device_attribute *attr,
2689 			   char *buf)
2690 {
2691 	return sprintf(buf, "0\n");
2692 }
2693 
2694 static DEVICE_ATTR_RO(hotkey_bios_enabled);
2695 
2696 /* sysfs hotkey bios_mask ---------------------------------------------- */
2697 static ssize_t hotkey_bios_mask_show(struct device *dev,
2698 			   struct device_attribute *attr,
2699 			   char *buf)
2700 {
2701 	printk_deprecated_attribute("hotkey_bios_mask",
2702 			"This attribute is useless.");
2703 	return sysfs_emit(buf, "0x%08x\n", hotkey_orig_mask);
2704 }
2705 
2706 static DEVICE_ATTR_RO(hotkey_bios_mask);
2707 
2708 /* sysfs hotkey all_mask ----------------------------------------------- */
2709 static ssize_t hotkey_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_all_mask | hotkey_source_mask);
2715 }
2716 
2717 static DEVICE_ATTR_RO(hotkey_all_mask);
2718 
2719 /* sysfs hotkey all_mask ----------------------------------------------- */
2720 static ssize_t hotkey_adaptive_all_mask_show(struct device *dev,
2721 			   struct device_attribute *attr,
2722 			   char *buf)
2723 {
2724 	return sysfs_emit(buf, "0x%08x\n",
2725 			hotkey_adaptive_all_mask | hotkey_source_mask);
2726 }
2727 
2728 static DEVICE_ATTR_RO(hotkey_adaptive_all_mask);
2729 
2730 /* sysfs hotkey recommended_mask --------------------------------------- */
2731 static ssize_t hotkey_recommended_mask_show(struct device *dev,
2732 					    struct device_attribute *attr,
2733 					    char *buf)
2734 {
2735 	return sysfs_emit(buf, "0x%08x\n",
2736 			(hotkey_all_mask | hotkey_source_mask)
2737 			& ~hotkey_reserved_mask);
2738 }
2739 
2740 static DEVICE_ATTR_RO(hotkey_recommended_mask);
2741 
2742 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2743 
2744 /* sysfs hotkey hotkey_source_mask ------------------------------------- */
2745 static ssize_t hotkey_source_mask_show(struct device *dev,
2746 			   struct device_attribute *attr,
2747 			   char *buf)
2748 {
2749 	return sysfs_emit(buf, "0x%08x\n", hotkey_source_mask);
2750 }
2751 
2752 static ssize_t hotkey_source_mask_store(struct device *dev,
2753 			    struct device_attribute *attr,
2754 			    const char *buf, size_t count)
2755 {
2756 	unsigned long t;
2757 	u32 r_ev;
2758 	int rc;
2759 
2760 	if (parse_strtoul(buf, 0xffffffffUL, &t) ||
2761 		((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0))
2762 		return -EINVAL;
2763 
2764 	if (mutex_lock_killable(&hotkey_mutex))
2765 		return -ERESTARTSYS;
2766 
2767 	HOTKEY_CONFIG_CRITICAL_START
2768 	hotkey_source_mask = t;
2769 	HOTKEY_CONFIG_CRITICAL_END
2770 
2771 	rc = hotkey_mask_set((hotkey_user_mask | hotkey_driver_mask) &
2772 			~hotkey_source_mask);
2773 	hotkey_poll_setup(true);
2774 
2775 	/* check if events needed by the driver got disabled */
2776 	r_ev = hotkey_driver_mask & ~(hotkey_acpi_mask & hotkey_all_mask)
2777 		& ~hotkey_source_mask & TPACPI_HKEY_NVRAM_KNOWN_MASK;
2778 
2779 	mutex_unlock(&hotkey_mutex);
2780 
2781 	if (rc < 0)
2782 		pr_err("hotkey_source_mask: failed to update the firmware event mask!\n");
2783 
2784 	if (r_ev)
2785 		pr_notice("hotkey_source_mask: some important events were disabled: 0x%04x\n",
2786 			  r_ev);
2787 
2788 	tpacpi_disclose_usertask("hotkey_source_mask", "set to 0x%08lx\n", t);
2789 
2790 	return (rc < 0) ? rc : count;
2791 }
2792 
2793 static DEVICE_ATTR_RW(hotkey_source_mask);
2794 
2795 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */
2796 static ssize_t hotkey_poll_freq_show(struct device *dev,
2797 			   struct device_attribute *attr,
2798 			   char *buf)
2799 {
2800 	return sysfs_emit(buf, "%d\n", hotkey_poll_freq);
2801 }
2802 
2803 static ssize_t hotkey_poll_freq_store(struct device *dev,
2804 			    struct device_attribute *attr,
2805 			    const char *buf, size_t count)
2806 {
2807 	unsigned long t;
2808 
2809 	if (parse_strtoul(buf, 25, &t))
2810 		return -EINVAL;
2811 
2812 	if (mutex_lock_killable(&hotkey_mutex))
2813 		return -ERESTARTSYS;
2814 
2815 	hotkey_poll_set_freq(t);
2816 	hotkey_poll_setup(true);
2817 
2818 	mutex_unlock(&hotkey_mutex);
2819 
2820 	tpacpi_disclose_usertask("hotkey_poll_freq", "set to %lu\n", t);
2821 
2822 	return count;
2823 }
2824 
2825 static DEVICE_ATTR_RW(hotkey_poll_freq);
2826 
2827 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2828 
2829 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */
2830 static ssize_t hotkey_radio_sw_show(struct device *dev,
2831 			   struct device_attribute *attr,
2832 			   char *buf)
2833 {
2834 	int res;
2835 	res = hotkey_get_wlsw();
2836 	if (res < 0)
2837 		return res;
2838 
2839 	/* Opportunistic update */
2840 	tpacpi_rfk_update_hwblock_state((res == TPACPI_RFK_RADIO_OFF));
2841 
2842 	return sysfs_emit(buf, "%d\n",
2843 			(res == TPACPI_RFK_RADIO_OFF) ? 0 : 1);
2844 }
2845 
2846 static DEVICE_ATTR_RO(hotkey_radio_sw);
2847 
2848 static void hotkey_radio_sw_notify_change(void)
2849 {
2850 	if (tp_features.hotkey_wlsw)
2851 		sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2852 			     "hotkey_radio_sw");
2853 }
2854 
2855 /* sysfs hotkey tablet mode (pollable) --------------------------------- */
2856 static ssize_t hotkey_tablet_mode_show(struct device *dev,
2857 			   struct device_attribute *attr,
2858 			   char *buf)
2859 {
2860 	int res, s;
2861 	res = hotkey_get_tablet_mode(&s);
2862 	if (res < 0)
2863 		return res;
2864 
2865 	return sysfs_emit(buf, "%d\n", !!s);
2866 }
2867 
2868 static DEVICE_ATTR_RO(hotkey_tablet_mode);
2869 
2870 static void hotkey_tablet_mode_notify_change(void)
2871 {
2872 	if (tp_features.hotkey_tablet)
2873 		sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2874 			     "hotkey_tablet_mode");
2875 }
2876 
2877 /* sysfs wakeup reason (pollable) -------------------------------------- */
2878 static ssize_t hotkey_wakeup_reason_show(struct device *dev,
2879 			   struct device_attribute *attr,
2880 			   char *buf)
2881 {
2882 	return sysfs_emit(buf, "%d\n", hotkey_wakeup_reason);
2883 }
2884 
2885 static DEVICE_ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL);
2886 
2887 static void hotkey_wakeup_reason_notify_change(void)
2888 {
2889 	sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2890 		     "wakeup_reason");
2891 }
2892 
2893 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */
2894 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev,
2895 			   struct device_attribute *attr,
2896 			   char *buf)
2897 {
2898 	return sysfs_emit(buf, "%d\n", hotkey_autosleep_ack);
2899 }
2900 
2901 static DEVICE_ATTR(wakeup_hotunplug_complete, S_IRUGO,
2902 		   hotkey_wakeup_hotunplug_complete_show, NULL);
2903 
2904 static void hotkey_wakeup_hotunplug_complete_notify_change(void)
2905 {
2906 	sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2907 		     "wakeup_hotunplug_complete");
2908 }
2909 
2910 /* sysfs adaptive kbd mode --------------------------------------------- */
2911 
2912 static int adaptive_keyboard_get_mode(void);
2913 static int adaptive_keyboard_set_mode(int new_mode);
2914 
2915 enum ADAPTIVE_KEY_MODE {
2916 	HOME_MODE,
2917 	WEB_BROWSER_MODE,
2918 	WEB_CONFERENCE_MODE,
2919 	FUNCTION_MODE,
2920 	LAYFLAT_MODE
2921 };
2922 
2923 static ssize_t adaptive_kbd_mode_show(struct device *dev,
2924 			   struct device_attribute *attr,
2925 			   char *buf)
2926 {
2927 	int current_mode;
2928 
2929 	current_mode = adaptive_keyboard_get_mode();
2930 	if (current_mode < 0)
2931 		return current_mode;
2932 
2933 	return sysfs_emit(buf, "%d\n", current_mode);
2934 }
2935 
2936 static ssize_t adaptive_kbd_mode_store(struct device *dev,
2937 			    struct device_attribute *attr,
2938 			    const char *buf, size_t count)
2939 {
2940 	unsigned long t;
2941 	int res;
2942 
2943 	if (parse_strtoul(buf, LAYFLAT_MODE, &t))
2944 		return -EINVAL;
2945 
2946 	res = adaptive_keyboard_set_mode(t);
2947 	return (res < 0) ? res : count;
2948 }
2949 
2950 static DEVICE_ATTR_RW(adaptive_kbd_mode);
2951 
2952 static struct attribute *adaptive_kbd_attributes[] = {
2953 	&dev_attr_adaptive_kbd_mode.attr,
2954 	NULL
2955 };
2956 
2957 static umode_t hadaptive_kbd_attr_is_visible(struct kobject *kobj,
2958 					     struct attribute *attr, int n)
2959 {
2960 	return tp_features.has_adaptive_kbd ? attr->mode : 0;
2961 }
2962 
2963 static const struct attribute_group adaptive_kbd_attr_group = {
2964 	.is_visible = hadaptive_kbd_attr_is_visible,
2965 	.attrs = adaptive_kbd_attributes,
2966 };
2967 
2968 /* --------------------------------------------------------------------- */
2969 
2970 static struct attribute *hotkey_attributes[] = {
2971 	&dev_attr_hotkey_enable.attr,
2972 	&dev_attr_hotkey_bios_enabled.attr,
2973 	&dev_attr_hotkey_bios_mask.attr,
2974 	&dev_attr_wakeup_reason.attr,
2975 	&dev_attr_wakeup_hotunplug_complete.attr,
2976 	&dev_attr_hotkey_mask.attr,
2977 	&dev_attr_hotkey_all_mask.attr,
2978 	&dev_attr_hotkey_adaptive_all_mask.attr,
2979 	&dev_attr_hotkey_recommended_mask.attr,
2980 	&dev_attr_hotkey_tablet_mode.attr,
2981 	&dev_attr_hotkey_radio_sw.attr,
2982 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2983 	&dev_attr_hotkey_source_mask.attr,
2984 	&dev_attr_hotkey_poll_freq.attr,
2985 #endif
2986 	NULL
2987 };
2988 
2989 static umode_t hotkey_attr_is_visible(struct kobject *kobj,
2990 				      struct attribute *attr, int n)
2991 {
2992 	if (attr == &dev_attr_hotkey_tablet_mode.attr) {
2993 		if (!tp_features.hotkey_tablet)
2994 			return 0;
2995 	} else if (attr == &dev_attr_hotkey_radio_sw.attr) {
2996 		if (!tp_features.hotkey_wlsw)
2997 			return 0;
2998 	}
2999 
3000 	return attr->mode;
3001 }
3002 
3003 static const struct attribute_group hotkey_attr_group = {
3004 	.is_visible = hotkey_attr_is_visible,
3005 	.attrs = hotkey_attributes,
3006 };
3007 
3008 /*
3009  * Sync both the hw and sw blocking state of all switches
3010  */
3011 static void tpacpi_send_radiosw_update(void)
3012 {
3013 	int wlsw;
3014 
3015 	/*
3016 	 * We must sync all rfkill controllers *before* issuing any
3017 	 * rfkill input events, or we will race the rfkill core input
3018 	 * handler.
3019 	 *
3020 	 * tpacpi_inputdev_send_mutex works as a synchronization point
3021 	 * for the above.
3022 	 *
3023 	 * We optimize to avoid numerous calls to hotkey_get_wlsw.
3024 	 */
3025 
3026 	wlsw = hotkey_get_wlsw();
3027 
3028 	/* Sync hw blocking state first if it is hw-blocked */
3029 	if (wlsw == TPACPI_RFK_RADIO_OFF)
3030 		tpacpi_rfk_update_hwblock_state(true);
3031 
3032 	/* Sync hw blocking state last if it is hw-unblocked */
3033 	if (wlsw == TPACPI_RFK_RADIO_ON)
3034 		tpacpi_rfk_update_hwblock_state(false);
3035 
3036 	/* Issue rfkill input event for WLSW switch */
3037 	if (!(wlsw < 0)) {
3038 		mutex_lock(&tpacpi_inputdev_send_mutex);
3039 
3040 		input_report_switch(tpacpi_inputdev,
3041 				    SW_RFKILL_ALL, (wlsw > 0));
3042 		input_sync(tpacpi_inputdev);
3043 
3044 		mutex_unlock(&tpacpi_inputdev_send_mutex);
3045 	}
3046 
3047 	/*
3048 	 * this can be unconditional, as we will poll state again
3049 	 * if userspace uses the notify to read data
3050 	 */
3051 	hotkey_radio_sw_notify_change();
3052 }
3053 
3054 static void hotkey_exit(void)
3055 {
3056 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3057 	mutex_lock(&hotkey_mutex);
3058 	hotkey_poll_stop_sync();
3059 	mutex_unlock(&hotkey_mutex);
3060 #endif
3061 	dbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_HKEY,
3062 		   "restoring original HKEY status and mask\n");
3063 	/* yes, there is a bitwise or below, we want the
3064 	 * functions to be called even if one of them fail */
3065 	if (((tp_features.hotkey_mask &&
3066 	      hotkey_mask_set(hotkey_orig_mask)) |
3067 	     hotkey_status_set(false)) != 0)
3068 		pr_err("failed to restore hot key mask to BIOS defaults\n");
3069 }
3070 
3071 static void __init hotkey_unmap(const unsigned int scancode)
3072 {
3073 	if (hotkey_keycode_map[scancode] != KEY_RESERVED) {
3074 		clear_bit(hotkey_keycode_map[scancode],
3075 			  tpacpi_inputdev->keybit);
3076 		hotkey_keycode_map[scancode] = KEY_RESERVED;
3077 	}
3078 }
3079 
3080 /*
3081  * HKEY quirks:
3082  *   TPACPI_HK_Q_INIMASK:	Supports FN+F3,FN+F4,FN+F12
3083  */
3084 
3085 #define	TPACPI_HK_Q_INIMASK	0x0001
3086 
3087 static const struct tpacpi_quirk tpacpi_hotkey_qtable[] __initconst = {
3088 	TPACPI_Q_IBM('I', 'H', TPACPI_HK_Q_INIMASK), /* 600E */
3089 	TPACPI_Q_IBM('I', 'N', TPACPI_HK_Q_INIMASK), /* 600E */
3090 	TPACPI_Q_IBM('I', 'D', TPACPI_HK_Q_INIMASK), /* 770, 770E, 770ED */
3091 	TPACPI_Q_IBM('I', 'W', TPACPI_HK_Q_INIMASK), /* A20m */
3092 	TPACPI_Q_IBM('I', 'V', TPACPI_HK_Q_INIMASK), /* A20p */
3093 	TPACPI_Q_IBM('1', '0', TPACPI_HK_Q_INIMASK), /* A21e, A22e */
3094 	TPACPI_Q_IBM('K', 'U', TPACPI_HK_Q_INIMASK), /* A21e */
3095 	TPACPI_Q_IBM('K', 'X', TPACPI_HK_Q_INIMASK), /* A21m, A22m */
3096 	TPACPI_Q_IBM('K', 'Y', TPACPI_HK_Q_INIMASK), /* A21p, A22p */
3097 	TPACPI_Q_IBM('1', 'B', TPACPI_HK_Q_INIMASK), /* A22e */
3098 	TPACPI_Q_IBM('1', '3', TPACPI_HK_Q_INIMASK), /* A22m */
3099 	TPACPI_Q_IBM('1', 'E', TPACPI_HK_Q_INIMASK), /* A30/p (0) */
3100 	TPACPI_Q_IBM('1', 'C', TPACPI_HK_Q_INIMASK), /* R30 */
3101 	TPACPI_Q_IBM('1', 'F', TPACPI_HK_Q_INIMASK), /* R31 */
3102 	TPACPI_Q_IBM('I', 'Y', TPACPI_HK_Q_INIMASK), /* T20 */
3103 	TPACPI_Q_IBM('K', 'Z', TPACPI_HK_Q_INIMASK), /* T21 */
3104 	TPACPI_Q_IBM('1', '6', TPACPI_HK_Q_INIMASK), /* T22 */
3105 	TPACPI_Q_IBM('I', 'Z', TPACPI_HK_Q_INIMASK), /* X20, X21 */
3106 	TPACPI_Q_IBM('1', 'D', TPACPI_HK_Q_INIMASK), /* X22, X23, X24 */
3107 };
3108 
3109 typedef u16 tpacpi_keymap_entry_t;
3110 typedef tpacpi_keymap_entry_t tpacpi_keymap_t[TPACPI_HOTKEY_MAP_LEN];
3111 
3112 static int hotkey_init_tablet_mode(void)
3113 {
3114 	int in_tablet_mode = 0, res;
3115 	char *type = NULL;
3116 
3117 	if (acpi_evalf(hkey_handle, &res, "GMMS", "qdd", 0)) {
3118 		int has_tablet_mode;
3119 
3120 		in_tablet_mode = hotkey_gmms_get_tablet_mode(res,
3121 							     &has_tablet_mode);
3122 		/*
3123 		 * The Yoga 11e series has 2 accelerometers described by a
3124 		 * BOSC0200 ACPI node. This setup relies on a Windows service
3125 		 * which calls special ACPI methods on this node to report
3126 		 * the laptop/tent/tablet mode to the EC. The bmc150 iio driver
3127 		 * does not support this, so skip the hotkey on these models.
3128 		 */
3129 		if (has_tablet_mode && !dual_accel_detect())
3130 			tp_features.hotkey_tablet = TP_HOTKEY_TABLET_USES_GMMS;
3131 		type = "GMMS";
3132 	} else if (acpi_evalf(hkey_handle, &res, "MHKG", "qd")) {
3133 		/* For X41t, X60t, X61t Tablets... */
3134 		tp_features.hotkey_tablet = TP_HOTKEY_TABLET_USES_MHKG;
3135 		in_tablet_mode = !!(res & TP_HOTKEY_TABLET_MASK);
3136 		type = "MHKG";
3137 	}
3138 
3139 	if (!tp_features.hotkey_tablet)
3140 		return 0;
3141 
3142 	pr_info("Tablet mode switch found (type: %s), currently in %s mode\n",
3143 		type, in_tablet_mode ? "tablet" : "laptop");
3144 
3145 	return in_tablet_mode;
3146 }
3147 
3148 static int __init hotkey_init(struct ibm_init_struct *iibm)
3149 {
3150 	/* Requirements for changing the default keymaps:
3151 	 *
3152 	 * 1. Many of the keys are mapped to KEY_RESERVED for very
3153 	 *    good reasons.  Do not change them unless you have deep
3154 	 *    knowledge on the IBM and Lenovo ThinkPad firmware for
3155 	 *    the various ThinkPad models.  The driver behaves
3156 	 *    differently for KEY_RESERVED: such keys have their
3157 	 *    hot key mask *unset* in mask_recommended, and also
3158 	 *    in the initial hot key mask programmed into the
3159 	 *    firmware at driver load time, which means the firm-
3160 	 *    ware may react very differently if you change them to
3161 	 *    something else;
3162 	 *
3163 	 * 2. You must be subscribed to the linux-thinkpad and
3164 	 *    ibm-acpi-devel mailing lists, and you should read the
3165 	 *    list archives since 2007 if you want to change the
3166 	 *    keymaps.  This requirement exists so that you will
3167 	 *    know the past history of problems with the thinkpad-
3168 	 *    acpi driver keymaps, and also that you will be
3169 	 *    listening to any bug reports;
3170 	 *
3171 	 * 3. Do not send thinkpad-acpi specific patches directly to
3172 	 *    for merging, *ever*.  Send them to the linux-acpi
3173 	 *    mailinglist for comments.  Merging is to be done only
3174 	 *    through acpi-test and the ACPI maintainer.
3175 	 *
3176 	 * If the above is too much to ask, don't change the keymap.
3177 	 * Ask the thinkpad-acpi maintainer to do it, instead.
3178 	 */
3179 
3180 	enum keymap_index {
3181 		TPACPI_KEYMAP_IBM_GENERIC = 0,
3182 		TPACPI_KEYMAP_LENOVO_GENERIC,
3183 	};
3184 
3185 	static const tpacpi_keymap_t tpacpi_keymaps[] __initconst = {
3186 	/* Generic keymap for IBM ThinkPads */
3187 	[TPACPI_KEYMAP_IBM_GENERIC] = {
3188 		/* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
3189 		KEY_FN_F1,	KEY_BATTERY,	KEY_COFFEE,	KEY_SLEEP,
3190 		KEY_WLAN,	KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
3191 		KEY_FN_F9,	KEY_FN_F10,	KEY_FN_F11,	KEY_SUSPEND,
3192 
3193 		/* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
3194 		KEY_UNKNOWN,	/* 0x0C: FN+BACKSPACE */
3195 		KEY_UNKNOWN,	/* 0x0D: FN+INSERT */
3196 		KEY_UNKNOWN,	/* 0x0E: FN+DELETE */
3197 
3198 		/* brightness: firmware always reacts to them */
3199 		KEY_RESERVED,	/* 0x0F: FN+HOME (brightness up) */
3200 		KEY_RESERVED,	/* 0x10: FN+END (brightness down) */
3201 
3202 		/* Thinklight: firmware always react to it */
3203 		KEY_RESERVED,	/* 0x11: FN+PGUP (thinklight toggle) */
3204 
3205 		KEY_UNKNOWN,	/* 0x12: FN+PGDOWN */
3206 		KEY_ZOOM,	/* 0x13: FN+SPACE (zoom) */
3207 
3208 		/* Volume: firmware always react to it and reprograms
3209 		 * the built-in *extra* mixer.  Never map it to control
3210 		 * another mixer by default. */
3211 		KEY_RESERVED,	/* 0x14: VOLUME UP */
3212 		KEY_RESERVED,	/* 0x15: VOLUME DOWN */
3213 		KEY_RESERVED,	/* 0x16: MUTE */
3214 
3215 		KEY_VENDOR,	/* 0x17: Thinkpad/AccessIBM/Lenovo */
3216 
3217 		/* (assignments unknown, please report if found) */
3218 		KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3219 		KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3220 
3221 		/* No assignments, only used for Adaptive keyboards. */
3222 		KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3223 		KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3224 		KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3225 		KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3226 		KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3227 
3228 		/* No assignment, used for newer Lenovo models */
3229 		KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3230 		KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3231 		KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3232 		KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3233 		KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3234 		KEY_UNKNOWN, KEY_UNKNOWN
3235 
3236 		},
3237 
3238 	/* Generic keymap for Lenovo ThinkPads */
3239 	[TPACPI_KEYMAP_LENOVO_GENERIC] = {
3240 		/* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
3241 		KEY_FN_F1,	KEY_COFFEE,	KEY_BATTERY,	KEY_SLEEP,
3242 		KEY_WLAN,	KEY_CAMERA, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
3243 		KEY_FN_F9,	KEY_FN_F10,	KEY_FN_F11,	KEY_SUSPEND,
3244 
3245 		/* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
3246 		KEY_UNKNOWN,	/* 0x0C: FN+BACKSPACE */
3247 		KEY_UNKNOWN,	/* 0x0D: FN+INSERT */
3248 		KEY_UNKNOWN,	/* 0x0E: FN+DELETE */
3249 
3250 		/* These should be enabled --only-- when ACPI video
3251 		 * is disabled (i.e. in "vendor" mode), and are handled
3252 		 * in a special way by the init code */
3253 		KEY_BRIGHTNESSUP,	/* 0x0F: FN+HOME (brightness up) */
3254 		KEY_BRIGHTNESSDOWN,	/* 0x10: FN+END (brightness down) */
3255 
3256 		KEY_RESERVED,	/* 0x11: FN+PGUP (thinklight toggle) */
3257 
3258 		KEY_UNKNOWN,	/* 0x12: FN+PGDOWN */
3259 		KEY_ZOOM,	/* 0x13: FN+SPACE (zoom) */
3260 
3261 		/* Volume: z60/z61, T60 (BIOS version?): firmware always
3262 		 * react to it and reprograms the built-in *extra* mixer.
3263 		 * Never map it to control another mixer by default.
3264 		 *
3265 		 * T60?, T61, R60?, R61: firmware and EC tries to send
3266 		 * these over the regular keyboard, so these are no-ops,
3267 		 * but there are still weird bugs re. MUTE, so do not
3268 		 * change unless you get test reports from all Lenovo
3269 		 * models.  May cause the BIOS to interfere with the
3270 		 * HDA mixer.
3271 		 */
3272 		KEY_RESERVED,	/* 0x14: VOLUME UP */
3273 		KEY_RESERVED,	/* 0x15: VOLUME DOWN */
3274 		KEY_RESERVED,	/* 0x16: MUTE */
3275 
3276 		KEY_VENDOR,	/* 0x17: Thinkpad/AccessIBM/Lenovo */
3277 
3278 		/* (assignments unknown, please report if found) */
3279 		KEY_UNKNOWN, KEY_UNKNOWN,
3280 
3281 		/*
3282 		 * The mic mute button only sends 0x1a.  It does not
3283 		 * automatically mute the mic or change the mute light.
3284 		 */
3285 		KEY_MICMUTE,	/* 0x1a: Mic mute (since ?400 or so) */
3286 
3287 		/* (assignments unknown, please report if found) */
3288 		KEY_UNKNOWN,
3289 
3290 		/* Extra keys in use since the X240 / T440 / T540 */
3291 		KEY_CONFIG, KEY_SEARCH, KEY_SCALE, KEY_FILE,
3292 
3293 		/*
3294 		 * These are the adaptive keyboard keycodes for Carbon X1 2014.
3295 		 * The first item in this list is the Mute button which is
3296 		 * emitted with 0x103 through
3297 		 * adaptive_keyboard_hotkey_notify_hotkey() when the sound
3298 		 * symbol is held.
3299 		 * We'll need to offset those by 0x20.
3300 		 */
3301 		KEY_RESERVED,        /* Mute held, 0x103 */
3302 		KEY_BRIGHTNESS_MIN,  /* Backlight off */
3303 		KEY_RESERVED,        /* Clipping tool */
3304 		KEY_RESERVED,        /* Cloud */
3305 		KEY_RESERVED,
3306 		KEY_VOICECOMMAND,    /* Voice */
3307 		KEY_RESERVED,
3308 		KEY_RESERVED,        /* Gestures */
3309 		KEY_RESERVED,
3310 		KEY_RESERVED,
3311 		KEY_RESERVED,
3312 		KEY_CONFIG,          /* Settings */
3313 		KEY_RESERVED,        /* New tab */
3314 		KEY_REFRESH,         /* Reload */
3315 		KEY_BACK,            /* Back */
3316 		KEY_RESERVED,        /* Microphone down */
3317 		KEY_RESERVED,        /* Microphone up */
3318 		KEY_RESERVED,        /* Microphone cancellation */
3319 		KEY_RESERVED,        /* Camera mode */
3320 		KEY_RESERVED,        /* Rotate display, 0x116 */
3321 
3322 		/*
3323 		 * These are found in 2017 models (e.g. T470s, X270).
3324 		 * The lowest known value is 0x311, which according to
3325 		 * the manual should launch a user defined favorite
3326 		 * application.
3327 		 *
3328 		 * The offset for these is TP_ACPI_HOTKEYSCAN_EXTENDED_START,
3329 		 * corresponding to 0x34.
3330 		 */
3331 
3332 		/* (assignments unknown, please report if found) */
3333 		KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3334 		KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3335 		KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3336 		KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
3337 		KEY_UNKNOWN,
3338 
3339 		KEY_BOOKMARKS,			/* Favorite app, 0x311 */
3340 		KEY_SELECTIVE_SCREENSHOT,	/* Clipping tool */
3341 		KEY_CALC,			/* Calculator (above numpad, P52) */
3342 		KEY_BLUETOOTH,			/* Bluetooth */
3343 		KEY_KEYBOARD,			/* Keyboard, 0x315 */
3344 		KEY_FN_RIGHT_SHIFT,		/* Fn + right Shift */
3345 		KEY_NOTIFICATION_CENTER,	/* Notification Center */
3346 		KEY_PICKUP_PHONE,		/* Answer incoming call */
3347 		KEY_HANGUP_PHONE,		/* Decline incoming call */
3348 		},
3349 	};
3350 
3351 	static const struct tpacpi_quirk tpacpi_keymap_qtable[] __initconst = {
3352 		/* Generic maps (fallback) */
3353 		{
3354 		  .vendor = PCI_VENDOR_ID_IBM,
3355 		  .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
3356 		  .quirks = TPACPI_KEYMAP_IBM_GENERIC,
3357 		},
3358 		{
3359 		  .vendor = PCI_VENDOR_ID_LENOVO,
3360 		  .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
3361 		  .quirks = TPACPI_KEYMAP_LENOVO_GENERIC,
3362 		},
3363 	};
3364 
3365 #define TPACPI_HOTKEY_MAP_SIZE		sizeof(tpacpi_keymap_t)
3366 #define TPACPI_HOTKEY_MAP_TYPESIZE	sizeof(tpacpi_keymap_entry_t)
3367 
3368 	int res, i;
3369 	int status;
3370 	int hkeyv;
3371 	bool radiosw_state  = false;
3372 	bool tabletsw_state = false;
3373 
3374 	unsigned long quirks;
3375 	unsigned long keymap_id;
3376 
3377 	vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3378 			"initializing hotkey subdriver\n");
3379 
3380 	BUG_ON(!tpacpi_inputdev);
3381 	BUG_ON(tpacpi_inputdev->open != NULL ||
3382 	       tpacpi_inputdev->close != NULL);
3383 
3384 	TPACPI_ACPIHANDLE_INIT(hkey);
3385 	mutex_init(&hotkey_mutex);
3386 
3387 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3388 	mutex_init(&hotkey_thread_data_mutex);
3389 #endif
3390 
3391 	/* hotkey not supported on 570 */
3392 	tp_features.hotkey = hkey_handle != NULL;
3393 
3394 	vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3395 		"hotkeys are %s\n",
3396 		str_supported(tp_features.hotkey));
3397 
3398 	if (!tp_features.hotkey)
3399 		return -ENODEV;
3400 
3401 	quirks = tpacpi_check_quirks(tpacpi_hotkey_qtable,
3402 				     ARRAY_SIZE(tpacpi_hotkey_qtable));
3403 
3404 	tpacpi_disable_brightness_delay();
3405 
3406 	/* mask not supported on 600e/x, 770e, 770x, A21e, A2xm/p,
3407 	   A30, R30, R31, T20-22, X20-21, X22-24.  Detected by checking
3408 	   for HKEY interface version 0x100 */
3409 	if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
3410 		vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3411 			    "firmware HKEY interface version: 0x%x\n",
3412 			    hkeyv);
3413 
3414 		switch (hkeyv >> 8) {
3415 		case 1:
3416 			/*
3417 			 * MHKV 0x100 in A31, R40, R40e,
3418 			 * T4x, X31, and later
3419 			 */
3420 
3421 			/* Paranoia check AND init hotkey_all_mask */
3422 			if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
3423 					"MHKA", "qd")) {
3424 				pr_err("missing MHKA handler, please report this to %s\n",
3425 				       TPACPI_MAIL);
3426 				/* Fallback: pre-init for FN+F3,F4,F12 */
3427 				hotkey_all_mask = 0x080cU;
3428 			} else {
3429 				tp_features.hotkey_mask = 1;
3430 			}
3431 			break;
3432 
3433 		case 2:
3434 			/*
3435 			 * MHKV 0x200 in X1, T460s, X260, T560, X1 Tablet (2016)
3436 			 */
3437 
3438 			/* Paranoia check AND init hotkey_all_mask */
3439 			if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
3440 					"MHKA", "dd", 1)) {
3441 				pr_err("missing MHKA handler, please report this to %s\n",
3442 				       TPACPI_MAIL);
3443 				/* Fallback: pre-init for FN+F3,F4,F12 */
3444 				hotkey_all_mask = 0x080cU;
3445 			} else {
3446 				tp_features.hotkey_mask = 1;
3447 			}
3448 
3449 			/*
3450 			 * Check if we have an adaptive keyboard, like on the
3451 			 * Lenovo Carbon X1 2014 (2nd Gen).
3452 			 */
3453 			if (acpi_evalf(hkey_handle, &hotkey_adaptive_all_mask,
3454 				       "MHKA", "dd", 2)) {
3455 				if (hotkey_adaptive_all_mask != 0)
3456 					tp_features.has_adaptive_kbd = true;
3457 			} else {
3458 				tp_features.has_adaptive_kbd = false;
3459 				hotkey_adaptive_all_mask = 0x0U;
3460 			}
3461 			break;
3462 
3463 		default:
3464 			pr_err("unknown version of the HKEY interface: 0x%x\n",
3465 			       hkeyv);
3466 			pr_err("please report this to %s\n", TPACPI_MAIL);
3467 			break;
3468 		}
3469 	}
3470 
3471 	vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3472 		"hotkey masks are %s\n",
3473 		str_supported(tp_features.hotkey_mask));
3474 
3475 	/* Init hotkey_all_mask if not initialized yet */
3476 	if (!tp_features.hotkey_mask && !hotkey_all_mask &&
3477 	    (quirks & TPACPI_HK_Q_INIMASK))
3478 		hotkey_all_mask = 0x080cU;  /* FN+F12, FN+F4, FN+F3 */
3479 
3480 	/* Init hotkey_acpi_mask and hotkey_orig_mask */
3481 	if (tp_features.hotkey_mask) {
3482 		/* hotkey_source_mask *must* be zero for
3483 		 * the first hotkey_mask_get to return hotkey_orig_mask */
3484 		res = hotkey_mask_get();
3485 		if (res)
3486 			return res;
3487 
3488 		hotkey_orig_mask = hotkey_acpi_mask;
3489 	} else {
3490 		hotkey_orig_mask = hotkey_all_mask;
3491 		hotkey_acpi_mask = hotkey_all_mask;
3492 	}
3493 
3494 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3495 	if (dbg_wlswemul) {
3496 		tp_features.hotkey_wlsw = 1;
3497 		radiosw_state = !!tpacpi_wlsw_emulstate;
3498 		pr_info("radio switch emulation enabled\n");
3499 	} else
3500 #endif
3501 	/* Not all thinkpads have a hardware radio switch */
3502 	if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
3503 		tp_features.hotkey_wlsw = 1;
3504 		radiosw_state = !!status;
3505 		pr_info("radio switch found; radios are %s\n", str_enabled_disabled(status & BIT(0)));
3506 	}
3507 
3508 	tabletsw_state = hotkey_init_tablet_mode();
3509 
3510 	/* Set up key map */
3511 	keymap_id = tpacpi_check_quirks(tpacpi_keymap_qtable,
3512 					ARRAY_SIZE(tpacpi_keymap_qtable));
3513 	BUG_ON(keymap_id >= ARRAY_SIZE(tpacpi_keymaps));
3514 	dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3515 		   "using keymap number %lu\n", keymap_id);
3516 
3517 	hotkey_keycode_map = kmemdup(&tpacpi_keymaps[keymap_id],
3518 			TPACPI_HOTKEY_MAP_SIZE,	GFP_KERNEL);
3519 	if (!hotkey_keycode_map) {
3520 		pr_err("failed to allocate memory for key map\n");
3521 		return -ENOMEM;
3522 	}
3523 
3524 	input_set_capability(tpacpi_inputdev, EV_MSC, MSC_SCAN);
3525 	tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
3526 	tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
3527 	tpacpi_inputdev->keycode = hotkey_keycode_map;
3528 	for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
3529 		if (hotkey_keycode_map[i] != KEY_RESERVED) {
3530 			input_set_capability(tpacpi_inputdev, EV_KEY,
3531 						hotkey_keycode_map[i]);
3532 		} else {
3533 			if (i < sizeof(hotkey_reserved_mask)*8)
3534 				hotkey_reserved_mask |= 1 << i;
3535 		}
3536 	}
3537 
3538 	if (tp_features.hotkey_wlsw) {
3539 		input_set_capability(tpacpi_inputdev, EV_SW, SW_RFKILL_ALL);
3540 		input_report_switch(tpacpi_inputdev,
3541 				    SW_RFKILL_ALL, radiosw_state);
3542 	}
3543 	if (tp_features.hotkey_tablet) {
3544 		input_set_capability(tpacpi_inputdev, EV_SW, SW_TABLET_MODE);
3545 		input_report_switch(tpacpi_inputdev,
3546 				    SW_TABLET_MODE, tabletsw_state);
3547 	}
3548 
3549 	/* Do not issue duplicate brightness change events to
3550 	 * userspace. tpacpi_detect_brightness_capabilities() must have
3551 	 * been called before this point  */
3552 	if (acpi_video_get_backlight_type() != acpi_backlight_vendor) {
3553 		pr_info("This ThinkPad has standard ACPI backlight brightness control, supported by the ACPI video driver\n");
3554 		pr_notice("Disabling thinkpad-acpi brightness events by default...\n");
3555 
3556 		/* Disable brightness up/down on Lenovo thinkpads when
3557 		 * ACPI is handling them, otherwise it is plain impossible
3558 		 * for userspace to do something even remotely sane */
3559 		hotkey_reserved_mask |=
3560 			(1 << TP_ACPI_HOTKEYSCAN_FNHOME)
3561 			| (1 << TP_ACPI_HOTKEYSCAN_FNEND);
3562 		hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNHOME);
3563 		hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNEND);
3564 	}
3565 
3566 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
3567 	hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK
3568 				& ~hotkey_all_mask
3569 				& ~hotkey_reserved_mask;
3570 
3571 	vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3572 		    "hotkey source mask 0x%08x, polling freq %u\n",
3573 		    hotkey_source_mask, hotkey_poll_freq);
3574 #endif
3575 
3576 	dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3577 			"enabling firmware HKEY event interface...\n");
3578 	res = hotkey_status_set(true);
3579 	if (res) {
3580 		hotkey_exit();
3581 		return res;
3582 	}
3583 	res = hotkey_mask_set(((hotkey_all_mask & ~hotkey_reserved_mask)
3584 			       | hotkey_driver_mask)
3585 			      & ~hotkey_source_mask);
3586 	if (res < 0 && res != -ENXIO) {
3587 		hotkey_exit();
3588 		return res;
3589 	}
3590 	hotkey_user_mask = (hotkey_acpi_mask | hotkey_source_mask)
3591 				& ~hotkey_reserved_mask;
3592 	vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
3593 		"initial masks: user=0x%08x, fw=0x%08x, poll=0x%08x\n",
3594 		hotkey_user_mask, hotkey_acpi_mask, hotkey_source_mask);
3595 
3596 	tpacpi_inputdev->open = &hotkey_inputdev_open;
3597 	tpacpi_inputdev->close = &hotkey_inputdev_close;
3598 
3599 	hotkey_poll_setup_safe(true);
3600 
3601 	return 0;
3602 }
3603 
3604 /* Thinkpad X1 Carbon support 5 modes including Home mode, Web browser
3605  * mode, Web conference mode, Function mode and Lay-flat mode.
3606  * We support Home mode and Function mode currently.
3607  *
3608  * Will consider support rest of modes in future.
3609  *
3610  */
3611 static const int adaptive_keyboard_modes[] = {
3612 	HOME_MODE,
3613 /*	WEB_BROWSER_MODE = 2,
3614 	WEB_CONFERENCE_MODE = 3, */
3615 	FUNCTION_MODE
3616 };
3617 
3618 #define DFR_CHANGE_ROW			0x101
3619 #define DFR_SHOW_QUICKVIEW_ROW		0x102
3620 #define FIRST_ADAPTIVE_KEY		0x103
3621 
3622 /* press Fn key a while second, it will switch to Function Mode. Then
3623  * release Fn key, previous mode be restored.
3624  */
3625 static bool adaptive_keyboard_mode_is_saved;
3626 static int adaptive_keyboard_prev_mode;
3627 
3628 static int adaptive_keyboard_get_mode(void)
3629 {
3630 	int mode = 0;
3631 
3632 	if (!acpi_evalf(hkey_handle, &mode, "GTRW", "dd", 0)) {
3633 		pr_err("Cannot read adaptive keyboard mode\n");
3634 		return -EIO;
3635 	}
3636 
3637 	return mode;
3638 }
3639 
3640 static int adaptive_keyboard_set_mode(int new_mode)
3641 {
3642 	if (new_mode < 0 ||
3643 		new_mode > LAYFLAT_MODE)
3644 		return -EINVAL;
3645 
3646 	if (!acpi_evalf(hkey_handle, NULL, "STRW", "vd", new_mode)) {
3647 		pr_err("Cannot set adaptive keyboard mode\n");
3648 		return -EIO;
3649 	}
3650 
3651 	return 0;
3652 }
3653 
3654 static int adaptive_keyboard_get_next_mode(int mode)
3655 {
3656 	size_t i;
3657 	size_t max_mode = ARRAY_SIZE(adaptive_keyboard_modes) - 1;
3658 
3659 	for (i = 0; i <= max_mode; i++) {
3660 		if (adaptive_keyboard_modes[i] == mode)
3661 			break;
3662 	}
3663 
3664 	if (i >= max_mode)
3665 		i = 0;
3666 	else
3667 		i++;
3668 
3669 	return adaptive_keyboard_modes[i];
3670 }
3671 
3672 static bool adaptive_keyboard_hotkey_notify_hotkey(unsigned int scancode)
3673 {
3674 	int current_mode = 0;
3675 	int new_mode = 0;
3676 	int keycode;
3677 
3678 	switch (scancode) {
3679 	case DFR_CHANGE_ROW:
3680 		if (adaptive_keyboard_mode_is_saved) {
3681 			new_mode = adaptive_keyboard_prev_mode;
3682 			adaptive_keyboard_mode_is_saved = false;
3683 		} else {
3684 			current_mode = adaptive_keyboard_get_mode();
3685 			if (current_mode < 0)
3686 				return false;
3687 			new_mode = adaptive_keyboard_get_next_mode(
3688 					current_mode);
3689 		}
3690 
3691 		if (adaptive_keyboard_set_mode(new_mode) < 0)
3692 			return false;
3693 
3694 		return true;
3695 
3696 	case DFR_SHOW_QUICKVIEW_ROW:
3697 		current_mode = adaptive_keyboard_get_mode();
3698 		if (current_mode < 0)
3699 			return false;
3700 
3701 		adaptive_keyboard_prev_mode = current_mode;
3702 		adaptive_keyboard_mode_is_saved = true;
3703 
3704 		if (adaptive_keyboard_set_mode (FUNCTION_MODE) < 0)
3705 			return false;
3706 		return true;
3707 
3708 	default:
3709 		if (scancode < FIRST_ADAPTIVE_KEY ||
3710 		    scancode >= FIRST_ADAPTIVE_KEY +
3711 		    TP_ACPI_HOTKEYSCAN_EXTENDED_START -
3712 		    TP_ACPI_HOTKEYSCAN_ADAPTIVE_START) {
3713 			pr_info("Unhandled adaptive keyboard key: 0x%x\n",
3714 				scancode);
3715 			return false;
3716 		}
3717 		keycode = hotkey_keycode_map[scancode - FIRST_ADAPTIVE_KEY +
3718 					     TP_ACPI_HOTKEYSCAN_ADAPTIVE_START];
3719 		if (keycode != KEY_RESERVED) {
3720 			mutex_lock(&tpacpi_inputdev_send_mutex);
3721 
3722 			input_report_key(tpacpi_inputdev, keycode, 1);
3723 			input_sync(tpacpi_inputdev);
3724 
3725 			input_report_key(tpacpi_inputdev, keycode, 0);
3726 			input_sync(tpacpi_inputdev);
3727 
3728 			mutex_unlock(&tpacpi_inputdev_send_mutex);
3729 		}
3730 		return true;
3731 	}
3732 }
3733 
3734 static bool hotkey_notify_extended_hotkey(const u32 hkey)
3735 {
3736 	unsigned int scancode;
3737 
3738 	switch (hkey) {
3739 	case TP_HKEY_EV_PRIVACYGUARD_TOGGLE:
3740 	case TP_HKEY_EV_AMT_TOGGLE:
3741 		tpacpi_driver_event(hkey);
3742 		return true;
3743 	}
3744 
3745 	/* Extended keycodes start at 0x300 and our offset into the map
3746 	 * TP_ACPI_HOTKEYSCAN_EXTENDED_START. The calculated scancode
3747 	 * will be positive, but might not be in the correct range.
3748 	 */
3749 	scancode = (hkey & 0xfff) - (0x300 - TP_ACPI_HOTKEYSCAN_EXTENDED_START);
3750 	if (scancode >= TP_ACPI_HOTKEYSCAN_EXTENDED_START &&
3751 	    scancode < TPACPI_HOTKEY_MAP_LEN) {
3752 		tpacpi_input_send_key(scancode);
3753 		return true;
3754 	}
3755 
3756 	return false;
3757 }
3758 
3759 static bool hotkey_notify_hotkey(const u32 hkey,
3760 				 bool *send_acpi_ev,
3761 				 bool *ignore_acpi_ev)
3762 {
3763 	/* 0x1000-0x1FFF: key presses */
3764 	unsigned int scancode = hkey & 0xfff;
3765 	*send_acpi_ev = true;
3766 	*ignore_acpi_ev = false;
3767 
3768 	/*
3769 	 * Original events are in the 0x10XX range, the adaptive keyboard
3770 	 * found in 2014 X1 Carbon emits events are of 0x11XX. In 2017
3771 	 * models, additional keys are emitted through 0x13XX.
3772 	 */
3773 	switch ((hkey >> 8) & 0xf) {
3774 	case 0:
3775 		if (scancode > 0 &&
3776 		    scancode <= TP_ACPI_HOTKEYSCAN_ADAPTIVE_START) {
3777 			/* HKEY event 0x1001 is scancode 0x00 */
3778 			scancode--;
3779 			if (!(hotkey_source_mask & (1 << scancode))) {
3780 				tpacpi_input_send_key_masked(scancode);
3781 				*send_acpi_ev = false;
3782 			} else {
3783 				*ignore_acpi_ev = true;
3784 			}
3785 			return true;
3786 		}
3787 		break;
3788 
3789 	case 1:
3790 		return adaptive_keyboard_hotkey_notify_hotkey(scancode);
3791 
3792 	case 3:
3793 		return hotkey_notify_extended_hotkey(hkey);
3794 	}
3795 
3796 	return false;
3797 }
3798 
3799 static bool hotkey_notify_wakeup(const u32 hkey,
3800 				 bool *send_acpi_ev,
3801 				 bool *ignore_acpi_ev)
3802 {
3803 	/* 0x2000-0x2FFF: Wakeup reason */
3804 	*send_acpi_ev = true;
3805 	*ignore_acpi_ev = false;
3806 
3807 	switch (hkey) {
3808 	case TP_HKEY_EV_WKUP_S3_UNDOCK: /* suspend, undock */
3809 	case TP_HKEY_EV_WKUP_S4_UNDOCK: /* hibernation, undock */
3810 		hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK;
3811 		*ignore_acpi_ev = true;
3812 		break;
3813 
3814 	case TP_HKEY_EV_WKUP_S3_BAYEJ: /* suspend, bay eject */
3815 	case TP_HKEY_EV_WKUP_S4_BAYEJ: /* hibernation, bay eject */
3816 		hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ;
3817 		*ignore_acpi_ev = true;
3818 		break;
3819 
3820 	case TP_HKEY_EV_WKUP_S3_BATLOW: /* Battery on critical low level/S3 */
3821 	case TP_HKEY_EV_WKUP_S4_BATLOW: /* Battery on critical low level/S4 */
3822 		pr_alert("EMERGENCY WAKEUP: battery almost empty\n");
3823 		/* how to auto-heal: */
3824 		/* 2313: woke up from S3, go to S4/S5 */
3825 		/* 2413: woke up from S4, go to S5 */
3826 		break;
3827 
3828 	default:
3829 		return false;
3830 	}
3831 
3832 	if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) {
3833 		pr_info("woke up due to a hot-unplug request...\n");
3834 		hotkey_wakeup_reason_notify_change();
3835 	}
3836 	return true;
3837 }
3838 
3839 static bool hotkey_notify_dockevent(const u32 hkey,
3840 				 bool *send_acpi_ev,
3841 				 bool *ignore_acpi_ev)
3842 {
3843 	/* 0x4000-0x4FFF: dock-related events */
3844 	*send_acpi_ev = true;
3845 	*ignore_acpi_ev = false;
3846 
3847 	switch (hkey) {
3848 	case TP_HKEY_EV_UNDOCK_ACK:
3849 		/* ACPI undock operation completed after wakeup */
3850 		hotkey_autosleep_ack = 1;
3851 		pr_info("undocked\n");
3852 		hotkey_wakeup_hotunplug_complete_notify_change();
3853 		return true;
3854 
3855 	case TP_HKEY_EV_HOTPLUG_DOCK: /* docked to port replicator */
3856 		pr_info("docked into hotplug port replicator\n");
3857 		return true;
3858 	case TP_HKEY_EV_HOTPLUG_UNDOCK: /* undocked from port replicator */
3859 		pr_info("undocked from hotplug port replicator\n");
3860 		return true;
3861 
3862 	/*
3863 	 * Deliberately ignore attaching and detaching the keybord cover to avoid
3864 	 * duplicates from intel-vbtn, which already emits SW_TABLET_MODE events
3865 	 * to userspace.
3866 	 *
3867 	 * Please refer to the following thread for more information and a preliminary
3868 	 * implementation using the GTOP ("Get Tablet OPtions") interface that could be
3869 	 * extended to other attachment options of the ThinkPad X1 Tablet series, such as
3870 	 * the Pico cartridge dock module:
3871 	 * https://lore.kernel.org/platform-driver-x86/38cb8265-1e30-d547-9e12-b4ae290be737@a-kobel.de/
3872 	 */
3873 	case TP_HKEY_EV_KBD_COVER_ATTACH:
3874 	case TP_HKEY_EV_KBD_COVER_DETACH:
3875 		*send_acpi_ev = false;
3876 		*ignore_acpi_ev = true;
3877 		return true;
3878 
3879 	default:
3880 		return false;
3881 	}
3882 }
3883 
3884 static bool hotkey_notify_usrevent(const u32 hkey,
3885 				 bool *send_acpi_ev,
3886 				 bool *ignore_acpi_ev)
3887 {
3888 	/* 0x5000-0x5FFF: human interface helpers */
3889 	*send_acpi_ev = true;
3890 	*ignore_acpi_ev = false;
3891 
3892 	switch (hkey) {
3893 	case TP_HKEY_EV_PEN_INSERTED:  /* X61t: tablet pen inserted into bay */
3894 	case TP_HKEY_EV_PEN_REMOVED:   /* X61t: tablet pen removed from bay */
3895 		return true;
3896 
3897 	case TP_HKEY_EV_TABLET_TABLET:   /* X41t-X61t: tablet mode */
3898 	case TP_HKEY_EV_TABLET_NOTEBOOK: /* X41t-X61t: normal mode */
3899 		tpacpi_input_send_tabletsw();
3900 		hotkey_tablet_mode_notify_change();
3901 		*send_acpi_ev = false;
3902 		return true;
3903 
3904 	case TP_HKEY_EV_LID_CLOSE:	/* Lid closed */
3905 	case TP_HKEY_EV_LID_OPEN:	/* Lid opened */
3906 	case TP_HKEY_EV_BRGHT_CHANGED:	/* brightness changed */
3907 		/* do not propagate these events */
3908 		*ignore_acpi_ev = true;
3909 		return true;
3910 
3911 	default:
3912 		return false;
3913 	}
3914 }
3915 
3916 static void thermal_dump_all_sensors(void);
3917 static void palmsensor_refresh(void);
3918 
3919 static bool hotkey_notify_6xxx(const u32 hkey,
3920 				 bool *send_acpi_ev,
3921 				 bool *ignore_acpi_ev)
3922 {
3923 	/* 0x6000-0x6FFF: thermal alarms/notices and keyboard events */
3924 	*send_acpi_ev = true;
3925 	*ignore_acpi_ev = false;
3926 
3927 	switch (hkey) {
3928 	case TP_HKEY_EV_THM_TABLE_CHANGED:
3929 		pr_debug("EC reports: Thermal Table has changed\n");
3930 		/* recommended action: do nothing, we don't have
3931 		 * Lenovo ATM information */
3932 		return true;
3933 	case TP_HKEY_EV_THM_CSM_COMPLETED:
3934 		pr_debug("EC reports: Thermal Control Command set completed (DYTC)\n");
3935 		/* Thermal event - pass on to event handler */
3936 		tpacpi_driver_event(hkey);
3937 		return true;
3938 	case TP_HKEY_EV_THM_TRANSFM_CHANGED:
3939 		pr_debug("EC reports: Thermal Transformation changed (GMTS)\n");
3940 		/* recommended action: do nothing, we don't have
3941 		 * Lenovo ATM information */
3942 		return true;
3943 	case TP_HKEY_EV_ALARM_BAT_HOT:
3944 		pr_crit("THERMAL ALARM: battery is too hot!\n");
3945 		/* recommended action: warn user through gui */
3946 		break;
3947 	case TP_HKEY_EV_ALARM_BAT_XHOT:
3948 		pr_alert("THERMAL EMERGENCY: battery is extremely hot!\n");
3949 		/* recommended action: immediate sleep/hibernate */
3950 		break;
3951 	case TP_HKEY_EV_ALARM_SENSOR_HOT:
3952 		pr_crit("THERMAL ALARM: a sensor reports something is too hot!\n");
3953 		/* recommended action: warn user through gui, that */
3954 		/* some internal component is too hot */
3955 		break;
3956 	case TP_HKEY_EV_ALARM_SENSOR_XHOT:
3957 		pr_alert("THERMAL EMERGENCY: a sensor reports something is extremely hot!\n");
3958 		/* recommended action: immediate sleep/hibernate */
3959 		break;
3960 	case TP_HKEY_EV_AC_CHANGED:
3961 		/* X120e, X121e, X220, X220i, X220t, X230, T420, T420s, W520:
3962 		 * AC status changed; can be triggered by plugging or
3963 		 * unplugging AC adapter, docking or undocking. */
3964 
3965 		fallthrough;
3966 
3967 	case TP_HKEY_EV_KEY_NUMLOCK:
3968 	case TP_HKEY_EV_KEY_FN:
3969 		/* key press events, we just ignore them as long as the EC
3970 		 * is still reporting them in the normal keyboard stream */
3971 		*send_acpi_ev = false;
3972 		*ignore_acpi_ev = true;
3973 		return true;
3974 
3975 	case TP_HKEY_EV_KEY_FN_ESC:
3976 		/* Get the media key status to force the status LED to update */
3977 		acpi_evalf(hkey_handle, NULL, "GMKS", "v");
3978 		*send_acpi_ev = false;
3979 		*ignore_acpi_ev = true;
3980 		return true;
3981 
3982 	case TP_HKEY_EV_TABLET_CHANGED:
3983 		tpacpi_input_send_tabletsw();
3984 		hotkey_tablet_mode_notify_change();
3985 		*send_acpi_ev = false;
3986 		return true;
3987 
3988 	case TP_HKEY_EV_PALM_DETECTED:
3989 	case TP_HKEY_EV_PALM_UNDETECTED:
3990 		/* palm detected  - pass on to event handler */
3991 		palmsensor_refresh();
3992 		return true;
3993 
3994 	default:
3995 		/* report simply as unknown, no sensor dump */
3996 		return false;
3997 	}
3998 
3999 	thermal_dump_all_sensors();
4000 	return true;
4001 }
4002 
4003 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
4004 {
4005 	u32 hkey;
4006 	bool send_acpi_ev;
4007 	bool ignore_acpi_ev;
4008 	bool known_ev;
4009 
4010 	if (event != 0x80) {
4011 		pr_err("unknown HKEY notification event %d\n", event);
4012 		/* forward it to userspace, maybe it knows how to handle it */
4013 		acpi_bus_generate_netlink_event(
4014 					ibm->acpi->device->pnp.device_class,
4015 					dev_name(&ibm->acpi->device->dev),
4016 					event, 0);
4017 		return;
4018 	}
4019 
4020 	while (1) {
4021 		if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
4022 			pr_err("failed to retrieve HKEY event\n");
4023 			return;
4024 		}
4025 
4026 		if (hkey == 0) {
4027 			/* queue empty */
4028 			return;
4029 		}
4030 
4031 		send_acpi_ev = true;
4032 		ignore_acpi_ev = false;
4033 
4034 		switch (hkey >> 12) {
4035 		case 1:
4036 			/* 0x1000-0x1FFF: key presses */
4037 			known_ev = hotkey_notify_hotkey(hkey, &send_acpi_ev,
4038 						 &ignore_acpi_ev);
4039 			break;
4040 		case 2:
4041 			/* 0x2000-0x2FFF: Wakeup reason */
4042 			known_ev = hotkey_notify_wakeup(hkey, &send_acpi_ev,
4043 						 &ignore_acpi_ev);
4044 			break;
4045 		case 3:
4046 			/* 0x3000-0x3FFF: bay-related wakeups */
4047 			switch (hkey) {
4048 			case TP_HKEY_EV_BAYEJ_ACK:
4049 				hotkey_autosleep_ack = 1;
4050 				pr_info("bay ejected\n");
4051 				hotkey_wakeup_hotunplug_complete_notify_change();
4052 				known_ev = true;
4053 				break;
4054 			case TP_HKEY_EV_OPTDRV_EJ:
4055 				/* FIXME: kick libata if SATA link offline */
4056 				known_ev = true;
4057 				break;
4058 			default:
4059 				known_ev = false;
4060 			}
4061 			break;
4062 		case 4:
4063 			/* 0x4000-0x4FFF: dock-related events */
4064 			known_ev = hotkey_notify_dockevent(hkey, &send_acpi_ev,
4065 						&ignore_acpi_ev);
4066 			break;
4067 		case 5:
4068 			/* 0x5000-0x5FFF: human interface helpers */
4069 			known_ev = hotkey_notify_usrevent(hkey, &send_acpi_ev,
4070 						 &ignore_acpi_ev);
4071 			break;
4072 		case 6:
4073 			/* 0x6000-0x6FFF: thermal alarms/notices and
4074 			 *                keyboard events */
4075 			known_ev = hotkey_notify_6xxx(hkey, &send_acpi_ev,
4076 						 &ignore_acpi_ev);
4077 			break;
4078 		case 7:
4079 			/* 0x7000-0x7FFF: misc */
4080 			if (tp_features.hotkey_wlsw &&
4081 					hkey == TP_HKEY_EV_RFKILL_CHANGED) {
4082 				tpacpi_send_radiosw_update();
4083 				send_acpi_ev = 0;
4084 				known_ev = true;
4085 				break;
4086 			}
4087 			fallthrough;	/* to default */
4088 		default:
4089 			known_ev = false;
4090 		}
4091 		if (!known_ev) {
4092 			pr_notice("unhandled HKEY event 0x%04x\n", hkey);
4093 			pr_notice("please report the conditions when this event happened to %s\n",
4094 				  TPACPI_MAIL);
4095 		}
4096 
4097 		/* netlink events */
4098 		if (!ignore_acpi_ev && send_acpi_ev) {
4099 			acpi_bus_generate_netlink_event(
4100 					ibm->acpi->device->pnp.device_class,
4101 					dev_name(&ibm->acpi->device->dev),
4102 					event, hkey);
4103 		}
4104 	}
4105 }
4106 
4107 static void hotkey_suspend(void)
4108 {
4109 	/* Do these on suspend, we get the events on early resume! */
4110 	hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE;
4111 	hotkey_autosleep_ack = 0;
4112 
4113 	/* save previous mode of adaptive keyboard of X1 Carbon */
4114 	if (tp_features.has_adaptive_kbd) {
4115 		if (!acpi_evalf(hkey_handle, &adaptive_keyboard_prev_mode,
4116 					"GTRW", "dd", 0)) {
4117 			pr_err("Cannot read adaptive keyboard mode.\n");
4118 		}
4119 	}
4120 }
4121 
4122 static void hotkey_resume(void)
4123 {
4124 	tpacpi_disable_brightness_delay();
4125 
4126 	if (hotkey_status_set(true) < 0 ||
4127 	    hotkey_mask_set(hotkey_acpi_mask) < 0)
4128 		pr_err("error while attempting to reset the event firmware interface\n");
4129 
4130 	tpacpi_send_radiosw_update();
4131 	tpacpi_input_send_tabletsw();
4132 	hotkey_tablet_mode_notify_change();
4133 	hotkey_wakeup_reason_notify_change();
4134 	hotkey_wakeup_hotunplug_complete_notify_change();
4135 	hotkey_poll_setup_safe(false);
4136 
4137 	/* restore previous mode of adapive keyboard of X1 Carbon */
4138 	if (tp_features.has_adaptive_kbd) {
4139 		if (!acpi_evalf(hkey_handle, NULL, "STRW", "vd",
4140 					adaptive_keyboard_prev_mode)) {
4141 			pr_err("Cannot set adaptive keyboard mode.\n");
4142 		}
4143 	}
4144 }
4145 
4146 /* procfs -------------------------------------------------------------- */
4147 static int hotkey_read(struct seq_file *m)
4148 {
4149 	int res, status;
4150 
4151 	if (!tp_features.hotkey) {
4152 		seq_printf(m, "status:\t\tnot supported\n");
4153 		return 0;
4154 	}
4155 
4156 	if (mutex_lock_killable(&hotkey_mutex))
4157 		return -ERESTARTSYS;
4158 	res = hotkey_status_get(&status);
4159 	if (!res)
4160 		res = hotkey_mask_get();
4161 	mutex_unlock(&hotkey_mutex);
4162 	if (res)
4163 		return res;
4164 
4165 	seq_printf(m, "status:\t\t%s\n", str_enabled_disabled(status & BIT(0)));
4166 	if (hotkey_all_mask) {
4167 		seq_printf(m, "mask:\t\t0x%08x\n", hotkey_user_mask);
4168 		seq_printf(m, "commands:\tenable, disable, reset, <mask>\n");
4169 	} else {
4170 		seq_printf(m, "mask:\t\tnot supported\n");
4171 		seq_printf(m, "commands:\tenable, disable, reset\n");
4172 	}
4173 
4174 	return 0;
4175 }
4176 
4177 static void hotkey_enabledisable_warn(bool enable)
4178 {
4179 	tpacpi_log_usertask("procfs hotkey enable/disable");
4180 	if (!WARN((tpacpi_lifecycle == TPACPI_LIFE_RUNNING || !enable),
4181 		  pr_fmt("hotkey enable/disable functionality has been removed from the driver.  Hotkeys are always enabled.\n")))
4182 		pr_err("Please remove the hotkey=enable module parameter, it is deprecated.  Hotkeys are always enabled.\n");
4183 }
4184 
4185 static int hotkey_write(char *buf)
4186 {
4187 	int res;
4188 	u32 mask;
4189 	char *cmd;
4190 
4191 	if (!tp_features.hotkey)
4192 		return -ENODEV;
4193 
4194 	if (mutex_lock_killable(&hotkey_mutex))
4195 		return -ERESTARTSYS;
4196 
4197 	mask = hotkey_user_mask;
4198 
4199 	res = 0;
4200 	while ((cmd = strsep(&buf, ","))) {
4201 		if (strlencmp(cmd, "enable") == 0) {
4202 			hotkey_enabledisable_warn(1);
4203 		} else if (strlencmp(cmd, "disable") == 0) {
4204 			hotkey_enabledisable_warn(0);
4205 			res = -EPERM;
4206 		} else if (strlencmp(cmd, "reset") == 0) {
4207 			mask = (hotkey_all_mask | hotkey_source_mask)
4208 				& ~hotkey_reserved_mask;
4209 		} else if (sscanf(cmd, "0x%x", &mask) == 1) {
4210 			/* mask set */
4211 		} else if (sscanf(cmd, "%x", &mask) == 1) {
4212 			/* mask set */
4213 		} else {
4214 			res = -EINVAL;
4215 			goto errexit;
4216 		}
4217 	}
4218 
4219 	if (!res) {
4220 		tpacpi_disclose_usertask("procfs hotkey",
4221 			"set mask to 0x%08x\n", mask);
4222 		res = hotkey_user_mask_set(mask);
4223 	}
4224 
4225 errexit:
4226 	mutex_unlock(&hotkey_mutex);
4227 	return res;
4228 }
4229 
4230 static const struct acpi_device_id ibm_htk_device_ids[] = {
4231 	{TPACPI_ACPI_IBM_HKEY_HID, 0},
4232 	{TPACPI_ACPI_LENOVO_HKEY_HID, 0},
4233 	{TPACPI_ACPI_LENOVO_HKEY_V2_HID, 0},
4234 	{"", 0},
4235 };
4236 
4237 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
4238 	.hid = ibm_htk_device_ids,
4239 	.notify = hotkey_notify,
4240 	.handle = &hkey_handle,
4241 	.type = ACPI_DEVICE_NOTIFY,
4242 };
4243 
4244 static struct ibm_struct hotkey_driver_data = {
4245 	.name = "hotkey",
4246 	.read = hotkey_read,
4247 	.write = hotkey_write,
4248 	.exit = hotkey_exit,
4249 	.resume = hotkey_resume,
4250 	.suspend = hotkey_suspend,
4251 	.acpi = &ibm_hotkey_acpidriver,
4252 };
4253 
4254 /*************************************************************************
4255  * Bluetooth subdriver
4256  */
4257 
4258 enum {
4259 	/* ACPI GBDC/SBDC bits */
4260 	TP_ACPI_BLUETOOTH_HWPRESENT	= 0x01,	/* Bluetooth hw available */
4261 	TP_ACPI_BLUETOOTH_RADIOSSW	= 0x02,	/* Bluetooth radio enabled */
4262 	TP_ACPI_BLUETOOTH_RESUMECTRL	= 0x04,	/* Bluetooth state at resume:
4263 						   0 = disable, 1 = enable */
4264 };
4265 
4266 enum {
4267 	/* ACPI \BLTH commands */
4268 	TP_ACPI_BLTH_GET_ULTRAPORT_ID	= 0x00, /* Get Ultraport BT ID */
4269 	TP_ACPI_BLTH_GET_PWR_ON_RESUME	= 0x01, /* Get power-on-resume state */
4270 	TP_ACPI_BLTH_PWR_ON_ON_RESUME	= 0x02, /* Resume powered on */
4271 	TP_ACPI_BLTH_PWR_OFF_ON_RESUME	= 0x03,	/* Resume powered off */
4272 	TP_ACPI_BLTH_SAVE_STATE		= 0x05, /* Save state for S4/S5 */
4273 };
4274 
4275 #define TPACPI_RFK_BLUETOOTH_SW_NAME	"tpacpi_bluetooth_sw"
4276 
4277 static int bluetooth_get_status(void)
4278 {
4279 	int status;
4280 
4281 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4282 	if (dbg_bluetoothemul)
4283 		return (tpacpi_bluetooth_emulstate) ?
4284 		       TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4285 #endif
4286 
4287 	if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
4288 		return -EIO;
4289 
4290 	return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ?
4291 			TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4292 }
4293 
4294 static int bluetooth_set_status(enum tpacpi_rfkill_state state)
4295 {
4296 	int status;
4297 
4298 	vdbg_printk(TPACPI_DBG_RFKILL, "will attempt to %s bluetooth\n",
4299 		    str_enable_disable(state == TPACPI_RFK_RADIO_ON));
4300 
4301 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4302 	if (dbg_bluetoothemul) {
4303 		tpacpi_bluetooth_emulstate = (state == TPACPI_RFK_RADIO_ON);
4304 		return 0;
4305 	}
4306 #endif
4307 
4308 	if (state == TPACPI_RFK_RADIO_ON)
4309 		status = TP_ACPI_BLUETOOTH_RADIOSSW
4310 			  | TP_ACPI_BLUETOOTH_RESUMECTRL;
4311 	else
4312 		status = 0;
4313 
4314 	if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
4315 		return -EIO;
4316 
4317 	return 0;
4318 }
4319 
4320 /* sysfs bluetooth enable ---------------------------------------------- */
4321 static ssize_t bluetooth_enable_show(struct device *dev,
4322 			   struct device_attribute *attr,
4323 			   char *buf)
4324 {
4325 	return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_BLUETOOTH_SW_ID,
4326 			attr, buf);
4327 }
4328 
4329 static ssize_t bluetooth_enable_store(struct device *dev,
4330 			    struct device_attribute *attr,
4331 			    const char *buf, size_t count)
4332 {
4333 	return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_BLUETOOTH_SW_ID,
4334 				attr, buf, count);
4335 }
4336 
4337 static DEVICE_ATTR_RW(bluetooth_enable);
4338 
4339 /* --------------------------------------------------------------------- */
4340 
4341 static struct attribute *bluetooth_attributes[] = {
4342 	&dev_attr_bluetooth_enable.attr,
4343 	NULL
4344 };
4345 
4346 static umode_t bluetooth_attr_is_visible(struct kobject *kobj,
4347 					 struct attribute *attr, int n)
4348 {
4349 	return tp_features.bluetooth ? attr->mode : 0;
4350 }
4351 
4352 static const struct attribute_group bluetooth_attr_group = {
4353 	.is_visible = bluetooth_attr_is_visible,
4354 	.attrs = bluetooth_attributes,
4355 };
4356 
4357 static const struct tpacpi_rfk_ops bluetooth_tprfk_ops = {
4358 	.get_status = bluetooth_get_status,
4359 	.set_status = bluetooth_set_status,
4360 };
4361 
4362 static void bluetooth_shutdown(void)
4363 {
4364 	/* Order firmware to save current state to NVRAM */
4365 	if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd",
4366 			TP_ACPI_BLTH_SAVE_STATE))
4367 		pr_notice("failed to save bluetooth state to NVRAM\n");
4368 	else
4369 		vdbg_printk(TPACPI_DBG_RFKILL,
4370 			"bluetooth state saved to NVRAM\n");
4371 }
4372 
4373 static void bluetooth_exit(void)
4374 {
4375 	tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
4376 	bluetooth_shutdown();
4377 }
4378 
4379 static const struct dmi_system_id fwbug_list[] __initconst = {
4380 	{
4381 		.ident = "ThinkPad E485",
4382 		.driver_data = &quirk_btusb_bug,
4383 		.matches = {
4384 			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
4385 			DMI_MATCH(DMI_BOARD_NAME, "20KU"),
4386 		},
4387 	},
4388 	{
4389 		.ident = "ThinkPad E585",
4390 		.driver_data = &quirk_btusb_bug,
4391 		.matches = {
4392 			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
4393 			DMI_MATCH(DMI_BOARD_NAME, "20KV"),
4394 		},
4395 	},
4396 	{
4397 		.ident = "ThinkPad A285 - 20MW",
4398 		.driver_data = &quirk_btusb_bug,
4399 		.matches = {
4400 			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
4401 			DMI_MATCH(DMI_BOARD_NAME, "20MW"),
4402 		},
4403 	},
4404 	{
4405 		.ident = "ThinkPad A285 - 20MX",
4406 		.driver_data = &quirk_btusb_bug,
4407 		.matches = {
4408 			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
4409 			DMI_MATCH(DMI_BOARD_NAME, "20MX"),
4410 		},
4411 	},
4412 	{
4413 		.ident = "ThinkPad A485 - 20MU",
4414 		.driver_data = &quirk_btusb_bug,
4415 		.matches = {
4416 			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
4417 			DMI_MATCH(DMI_BOARD_NAME, "20MU"),
4418 		},
4419 	},
4420 	{
4421 		.ident = "ThinkPad A485 - 20MV",
4422 		.driver_data = &quirk_btusb_bug,
4423 		.matches = {
4424 			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
4425 			DMI_MATCH(DMI_BOARD_NAME, "20MV"),
4426 		},
4427 	},
4428 	{
4429 		.ident = "L14 Gen2 AMD",
4430 		.driver_data = &quirk_s2idle_bug,
4431 		.matches = {
4432 			DMI_MATCH(DMI_BOARD_VENDOR, "LENOVO"),
4433 			DMI_MATCH(DMI_PRODUCT_NAME, "20X5"),
4434 		}
4435 	},
4436 	{
4437 		.ident = "T14s Gen2 AMD",
4438 		.driver_data = &quirk_s2idle_bug,
4439 		.matches = {
4440 			DMI_MATCH(DMI_BOARD_VENDOR, "LENOVO"),
4441 			DMI_MATCH(DMI_PRODUCT_NAME, "20XF"),
4442 		}
4443 	},
4444 	{
4445 		.ident = "X13 Gen2 AMD",
4446 		.driver_data = &quirk_s2idle_bug,
4447 		.matches = {
4448 			DMI_MATCH(DMI_BOARD_VENDOR, "LENOVO"),
4449 			DMI_MATCH(DMI_PRODUCT_NAME, "20XH"),
4450 		}
4451 	},
4452 	{
4453 		.ident = "T14 Gen2 AMD",
4454 		.driver_data = &quirk_s2idle_bug,
4455 		.matches = {
4456 			DMI_MATCH(DMI_BOARD_VENDOR, "LENOVO"),
4457 			DMI_MATCH(DMI_PRODUCT_NAME, "20XK"),
4458 		}
4459 	},
4460 	{
4461 		.ident = "T14 Gen1 AMD",
4462 		.driver_data = &quirk_s2idle_bug,
4463 		.matches = {
4464 			DMI_MATCH(DMI_BOARD_VENDOR, "LENOVO"),
4465 			DMI_MATCH(DMI_PRODUCT_NAME, "20UD"),
4466 		}
4467 	},
4468 	{
4469 		.ident = "T14 Gen1 AMD",
4470 		.driver_data = &quirk_s2idle_bug,
4471 		.matches = {
4472 			DMI_MATCH(DMI_BOARD_VENDOR, "LENOVO"),
4473 			DMI_MATCH(DMI_PRODUCT_NAME, "20UE"),
4474 		}
4475 	},
4476 	{
4477 		.ident = "T14s Gen1 AMD",
4478 		.driver_data = &quirk_s2idle_bug,
4479 		.matches = {
4480 			DMI_MATCH(DMI_BOARD_VENDOR, "LENOVO"),
4481 			DMI_MATCH(DMI_PRODUCT_NAME, "20UH"),
4482 		}
4483 	},
4484 	{
4485 		.ident = "P14s Gen1 AMD",
4486 		.driver_data = &quirk_s2idle_bug,
4487 		.matches = {
4488 			DMI_MATCH(DMI_BOARD_VENDOR, "LENOVO"),
4489 			DMI_MATCH(DMI_PRODUCT_NAME, "20Y1"),
4490 		}
4491 	},
4492 	{
4493 		.ident = "P14s Gen2 AMD",
4494 		.driver_data = &quirk_s2idle_bug,
4495 		.matches = {
4496 			DMI_MATCH(DMI_BOARD_VENDOR, "LENOVO"),
4497 			DMI_MATCH(DMI_PRODUCT_NAME, "21A0"),
4498 		}
4499 	},
4500 	{}
4501 };
4502 
4503 #ifdef CONFIG_SUSPEND
4504 /*
4505  * Lenovo laptops from a variety of generations run a SMI handler during the D3->D0
4506  * transition that occurs specifically when exiting suspend to idle which can cause
4507  * large delays during resume when the IOMMU translation layer is enabled (the default
4508  * behavior) for NVME devices:
4509  *
4510  * To avoid this firmware problem, skip the SMI handler on these machines before the
4511  * D0 transition occurs.
4512  */
4513 static void thinkpad_acpi_amd_s2idle_restore(void)
4514 {
4515 	struct resource *res;
4516 	void __iomem *addr;
4517 	u8 val;
4518 
4519 	res = request_mem_region_muxed(tp_features.quirks->s2idle_bug_mmio, 1,
4520 					"thinkpad_acpi_pm80");
4521 	if (!res)
4522 		return;
4523 
4524 	addr = ioremap(tp_features.quirks->s2idle_bug_mmio, 1);
4525 	if (!addr)
4526 		goto cleanup_resource;
4527 
4528 	val = ioread8(addr);
4529 	iowrite8(val & ~BIT(0), addr);
4530 
4531 	iounmap(addr);
4532 cleanup_resource:
4533 	release_resource(res);
4534 	kfree(res);
4535 }
4536 
4537 static struct acpi_s2idle_dev_ops thinkpad_acpi_s2idle_dev_ops = {
4538 	.restore = thinkpad_acpi_amd_s2idle_restore,
4539 };
4540 #endif
4541 
4542 static const struct pci_device_id fwbug_cards_ids[] __initconst = {
4543 	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x24F3) },
4544 	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x24FD) },
4545 	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x2526) },
4546 	{}
4547 };
4548 
4549 
4550 static int __init have_bt_fwbug(void)
4551 {
4552 	/*
4553 	 * Some AMD based ThinkPads have a firmware bug that calling
4554 	 * "GBDC" will cause bluetooth on Intel wireless cards blocked
4555 	 */
4556 	if (tp_features.quirks && tp_features.quirks->btusb_bug &&
4557 	    pci_dev_present(fwbug_cards_ids)) {
4558 		vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4559 			FW_BUG "disable bluetooth subdriver for Intel cards\n");
4560 		return 1;
4561 	} else
4562 		return 0;
4563 }
4564 
4565 static int __init bluetooth_init(struct ibm_init_struct *iibm)
4566 {
4567 	int res;
4568 	int status = 0;
4569 
4570 	vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4571 			"initializing bluetooth subdriver\n");
4572 
4573 	TPACPI_ACPIHANDLE_INIT(hkey);
4574 
4575 	/* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
4576 	   G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
4577 	tp_features.bluetooth = !have_bt_fwbug() && hkey_handle &&
4578 	    acpi_evalf(hkey_handle, &status, "GBDC", "qd");
4579 
4580 	vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4581 		"bluetooth is %s, status 0x%02x\n",
4582 		str_supported(tp_features.bluetooth),
4583 		status);
4584 
4585 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4586 	if (dbg_bluetoothemul) {
4587 		tp_features.bluetooth = 1;
4588 		pr_info("bluetooth switch emulation enabled\n");
4589 	} else
4590 #endif
4591 	if (tp_features.bluetooth &&
4592 	    !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
4593 		/* no bluetooth hardware present in system */
4594 		tp_features.bluetooth = 0;
4595 		dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4596 			   "bluetooth hardware not installed\n");
4597 	}
4598 
4599 	if (!tp_features.bluetooth)
4600 		return -ENODEV;
4601 
4602 	res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID,
4603 				&bluetooth_tprfk_ops,
4604 				RFKILL_TYPE_BLUETOOTH,
4605 				TPACPI_RFK_BLUETOOTH_SW_NAME,
4606 				true);
4607 	return res;
4608 }
4609 
4610 /* procfs -------------------------------------------------------------- */
4611 static int bluetooth_read(struct seq_file *m)
4612 {
4613 	return tpacpi_rfk_procfs_read(TPACPI_RFK_BLUETOOTH_SW_ID, m);
4614 }
4615 
4616 static int bluetooth_write(char *buf)
4617 {
4618 	return tpacpi_rfk_procfs_write(TPACPI_RFK_BLUETOOTH_SW_ID, buf);
4619 }
4620 
4621 static struct ibm_struct bluetooth_driver_data = {
4622 	.name = "bluetooth",
4623 	.read = bluetooth_read,
4624 	.write = bluetooth_write,
4625 	.exit = bluetooth_exit,
4626 	.shutdown = bluetooth_shutdown,
4627 };
4628 
4629 /*************************************************************************
4630  * Wan subdriver
4631  */
4632 
4633 enum {
4634 	/* ACPI GWAN/SWAN bits */
4635 	TP_ACPI_WANCARD_HWPRESENT	= 0x01,	/* Wan hw available */
4636 	TP_ACPI_WANCARD_RADIOSSW	= 0x02,	/* Wan radio enabled */
4637 	TP_ACPI_WANCARD_RESUMECTRL	= 0x04,	/* Wan state at resume:
4638 						   0 = disable, 1 = enable */
4639 };
4640 
4641 #define TPACPI_RFK_WWAN_SW_NAME		"tpacpi_wwan_sw"
4642 
4643 static int wan_get_status(void)
4644 {
4645 	int status;
4646 
4647 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4648 	if (dbg_wwanemul)
4649 		return (tpacpi_wwan_emulstate) ?
4650 		       TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4651 #endif
4652 
4653 	if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
4654 		return -EIO;
4655 
4656 	return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ?
4657 			TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4658 }
4659 
4660 static int wan_set_status(enum tpacpi_rfkill_state state)
4661 {
4662 	int status;
4663 
4664 	vdbg_printk(TPACPI_DBG_RFKILL, "will attempt to %s wwan\n",
4665 		    str_enable_disable(state == TPACPI_RFK_RADIO_ON));
4666 
4667 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4668 	if (dbg_wwanemul) {
4669 		tpacpi_wwan_emulstate = (state == TPACPI_RFK_RADIO_ON);
4670 		return 0;
4671 	}
4672 #endif
4673 
4674 	if (state == TPACPI_RFK_RADIO_ON)
4675 		status = TP_ACPI_WANCARD_RADIOSSW
4676 			 | TP_ACPI_WANCARD_RESUMECTRL;
4677 	else
4678 		status = 0;
4679 
4680 	if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
4681 		return -EIO;
4682 
4683 	return 0;
4684 }
4685 
4686 /* sysfs wan enable ---------------------------------------------------- */
4687 static ssize_t wan_enable_show(struct device *dev,
4688 			   struct device_attribute *attr,
4689 			   char *buf)
4690 {
4691 	return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_WWAN_SW_ID,
4692 			attr, buf);
4693 }
4694 
4695 static ssize_t wan_enable_store(struct device *dev,
4696 			    struct device_attribute *attr,
4697 			    const char *buf, size_t count)
4698 {
4699 	return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_WWAN_SW_ID,
4700 			attr, buf, count);
4701 }
4702 
4703 static DEVICE_ATTR(wwan_enable, S_IWUSR | S_IRUGO,
4704 		   wan_enable_show, wan_enable_store);
4705 
4706 /* --------------------------------------------------------------------- */
4707 
4708 static struct attribute *wan_attributes[] = {
4709 	&dev_attr_wwan_enable.attr,
4710 	NULL
4711 };
4712 
4713 static umode_t wan_attr_is_visible(struct kobject *kobj, struct attribute *attr,
4714 				   int n)
4715 {
4716 	return tp_features.wan ? attr->mode : 0;
4717 }
4718 
4719 static const struct attribute_group wan_attr_group = {
4720 	.is_visible = wan_attr_is_visible,
4721 	.attrs = wan_attributes,
4722 };
4723 
4724 static const struct tpacpi_rfk_ops wan_tprfk_ops = {
4725 	.get_status = wan_get_status,
4726 	.set_status = wan_set_status,
4727 };
4728 
4729 static void wan_shutdown(void)
4730 {
4731 	/* Order firmware to save current state to NVRAM */
4732 	if (!acpi_evalf(NULL, NULL, "\\WGSV", "vd",
4733 			TP_ACPI_WGSV_SAVE_STATE))
4734 		pr_notice("failed to save WWAN state to NVRAM\n");
4735 	else
4736 		vdbg_printk(TPACPI_DBG_RFKILL,
4737 			"WWAN state saved to NVRAM\n");
4738 }
4739 
4740 static void wan_exit(void)
4741 {
4742 	tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
4743 	wan_shutdown();
4744 }
4745 
4746 static int __init wan_init(struct ibm_init_struct *iibm)
4747 {
4748 	int res;
4749 	int status = 0;
4750 
4751 	vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4752 			"initializing wan subdriver\n");
4753 
4754 	TPACPI_ACPIHANDLE_INIT(hkey);
4755 
4756 	tp_features.wan = hkey_handle &&
4757 	    acpi_evalf(hkey_handle, &status, "GWAN", "qd");
4758 
4759 	vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4760 		"wan is %s, status 0x%02x\n",
4761 		str_supported(tp_features.wan),
4762 		status);
4763 
4764 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4765 	if (dbg_wwanemul) {
4766 		tp_features.wan = 1;
4767 		pr_info("wwan switch emulation enabled\n");
4768 	} else
4769 #endif
4770 	if (tp_features.wan &&
4771 	    !(status & TP_ACPI_WANCARD_HWPRESENT)) {
4772 		/* no wan hardware present in system */
4773 		tp_features.wan = 0;
4774 		dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4775 			   "wan hardware not installed\n");
4776 	}
4777 
4778 	if (!tp_features.wan)
4779 		return -ENODEV;
4780 
4781 	res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID,
4782 				&wan_tprfk_ops,
4783 				RFKILL_TYPE_WWAN,
4784 				TPACPI_RFK_WWAN_SW_NAME,
4785 				true);
4786 	return res;
4787 }
4788 
4789 /* procfs -------------------------------------------------------------- */
4790 static int wan_read(struct seq_file *m)
4791 {
4792 	return tpacpi_rfk_procfs_read(TPACPI_RFK_WWAN_SW_ID, m);
4793 }
4794 
4795 static int wan_write(char *buf)
4796 {
4797 	return tpacpi_rfk_procfs_write(TPACPI_RFK_WWAN_SW_ID, buf);
4798 }
4799 
4800 static struct ibm_struct wan_driver_data = {
4801 	.name = "wan",
4802 	.read = wan_read,
4803 	.write = wan_write,
4804 	.exit = wan_exit,
4805 	.shutdown = wan_shutdown,
4806 };
4807 
4808 /*************************************************************************
4809  * UWB subdriver
4810  */
4811 
4812 enum {
4813 	/* ACPI GUWB/SUWB bits */
4814 	TP_ACPI_UWB_HWPRESENT	= 0x01,	/* UWB hw available */
4815 	TP_ACPI_UWB_RADIOSSW	= 0x02,	/* UWB radio enabled */
4816 };
4817 
4818 #define TPACPI_RFK_UWB_SW_NAME	"tpacpi_uwb_sw"
4819 
4820 static int uwb_get_status(void)
4821 {
4822 	int status;
4823 
4824 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4825 	if (dbg_uwbemul)
4826 		return (tpacpi_uwb_emulstate) ?
4827 		       TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4828 #endif
4829 
4830 	if (!acpi_evalf(hkey_handle, &status, "GUWB", "d"))
4831 		return -EIO;
4832 
4833 	return ((status & TP_ACPI_UWB_RADIOSSW) != 0) ?
4834 			TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
4835 }
4836 
4837 static int uwb_set_status(enum tpacpi_rfkill_state state)
4838 {
4839 	int status;
4840 
4841 	vdbg_printk(TPACPI_DBG_RFKILL, "will attempt to %s UWB\n",
4842 		    str_enable_disable(state == TPACPI_RFK_RADIO_ON));
4843 
4844 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4845 	if (dbg_uwbemul) {
4846 		tpacpi_uwb_emulstate = (state == TPACPI_RFK_RADIO_ON);
4847 		return 0;
4848 	}
4849 #endif
4850 
4851 	if (state == TPACPI_RFK_RADIO_ON)
4852 		status = TP_ACPI_UWB_RADIOSSW;
4853 	else
4854 		status = 0;
4855 
4856 	if (!acpi_evalf(hkey_handle, NULL, "SUWB", "vd", status))
4857 		return -EIO;
4858 
4859 	return 0;
4860 }
4861 
4862 /* --------------------------------------------------------------------- */
4863 
4864 static const struct tpacpi_rfk_ops uwb_tprfk_ops = {
4865 	.get_status = uwb_get_status,
4866 	.set_status = uwb_set_status,
4867 };
4868 
4869 static void uwb_exit(void)
4870 {
4871 	tpacpi_destroy_rfkill(TPACPI_RFK_UWB_SW_ID);
4872 }
4873 
4874 static int __init uwb_init(struct ibm_init_struct *iibm)
4875 {
4876 	int res;
4877 	int status = 0;
4878 
4879 	vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4880 			"initializing uwb subdriver\n");
4881 
4882 	TPACPI_ACPIHANDLE_INIT(hkey);
4883 
4884 	tp_features.uwb = hkey_handle &&
4885 	    acpi_evalf(hkey_handle, &status, "GUWB", "qd");
4886 
4887 	vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
4888 		"uwb is %s, status 0x%02x\n",
4889 		str_supported(tp_features.uwb),
4890 		status);
4891 
4892 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
4893 	if (dbg_uwbemul) {
4894 		tp_features.uwb = 1;
4895 		pr_info("uwb switch emulation enabled\n");
4896 	} else
4897 #endif
4898 	if (tp_features.uwb &&
4899 	    !(status & TP_ACPI_UWB_HWPRESENT)) {
4900 		/* no uwb hardware present in system */
4901 		tp_features.uwb = 0;
4902 		dbg_printk(TPACPI_DBG_INIT,
4903 			   "uwb hardware not installed\n");
4904 	}
4905 
4906 	if (!tp_features.uwb)
4907 		return -ENODEV;
4908 
4909 	res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID,
4910 				&uwb_tprfk_ops,
4911 				RFKILL_TYPE_UWB,
4912 				TPACPI_RFK_UWB_SW_NAME,
4913 				false);
4914 	return res;
4915 }
4916 
4917 static struct ibm_struct uwb_driver_data = {
4918 	.name = "uwb",
4919 	.exit = uwb_exit,
4920 	.flags.experimental = 1,
4921 };
4922 
4923 /*************************************************************************
4924  * Video subdriver
4925  */
4926 
4927 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
4928 
4929 enum video_access_mode {
4930 	TPACPI_VIDEO_NONE = 0,
4931 	TPACPI_VIDEO_570,	/* 570 */
4932 	TPACPI_VIDEO_770,	/* 600e/x, 770e, 770x */
4933 	TPACPI_VIDEO_NEW,	/* all others */
4934 };
4935 
4936 enum {	/* video status flags, based on VIDEO_570 */
4937 	TP_ACPI_VIDEO_S_LCD = 0x01,	/* LCD output enabled */
4938 	TP_ACPI_VIDEO_S_CRT = 0x02,	/* CRT output enabled */
4939 	TP_ACPI_VIDEO_S_DVI = 0x08,	/* DVI output enabled */
4940 };
4941 
4942 enum {  /* TPACPI_VIDEO_570 constants */
4943 	TP_ACPI_VIDEO_570_PHSCMD = 0x87,	/* unknown magic constant :( */
4944 	TP_ACPI_VIDEO_570_PHSMASK = 0x03,	/* PHS bits that map to
4945 						 * video_status_flags */
4946 	TP_ACPI_VIDEO_570_PHS2CMD = 0x8b,	/* unknown magic constant :( */
4947 	TP_ACPI_VIDEO_570_PHS2SET = 0x80,	/* unknown magic constant :( */
4948 };
4949 
4950 static enum video_access_mode video_supported;
4951 static int video_orig_autosw;
4952 
4953 static int video_autosw_get(void);
4954 static int video_autosw_set(int enable);
4955 
4956 TPACPI_HANDLE(vid, root,
4957 	      "\\_SB.PCI.AGP.VGA",	/* 570 */
4958 	      "\\_SB.PCI0.AGP0.VID0",	/* 600e/x, 770x */
4959 	      "\\_SB.PCI0.VID0",	/* 770e */
4960 	      "\\_SB.PCI0.VID",		/* A21e, G4x, R50e, X30, X40 */
4961 	      "\\_SB.PCI0.AGP.VGA",	/* X100e and a few others */
4962 	      "\\_SB.PCI0.AGP.VID",	/* all others */
4963 	);				/* R30, R31 */
4964 
4965 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID");	/* G41 */
4966 
4967 static int __init video_init(struct ibm_init_struct *iibm)
4968 {
4969 	int ivga;
4970 
4971 	vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
4972 
4973 	TPACPI_ACPIHANDLE_INIT(vid);
4974 	if (tpacpi_is_ibm())
4975 		TPACPI_ACPIHANDLE_INIT(vid2);
4976 
4977 	if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
4978 		/* G41, assume IVGA doesn't change */
4979 		vid_handle = vid2_handle;
4980 
4981 	if (!vid_handle)
4982 		/* video switching not supported on R30, R31 */
4983 		video_supported = TPACPI_VIDEO_NONE;
4984 	else if (tpacpi_is_ibm() &&
4985 		 acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
4986 		/* 570 */
4987 		video_supported = TPACPI_VIDEO_570;
4988 	else if (tpacpi_is_ibm() &&
4989 		 acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
4990 		/* 600e/x, 770e, 770x */
4991 		video_supported = TPACPI_VIDEO_770;
4992 	else
4993 		/* all others */
4994 		video_supported = TPACPI_VIDEO_NEW;
4995 
4996 	vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
4997 		str_supported(video_supported != TPACPI_VIDEO_NONE),
4998 		video_supported);
4999 
5000 	return (video_supported != TPACPI_VIDEO_NONE) ? 0 : -ENODEV;
5001 }
5002 
5003 static void video_exit(void)
5004 {
5005 	dbg_printk(TPACPI_DBG_EXIT,
5006 		   "restoring original video autoswitch mode\n");
5007 	if (video_autosw_set(video_orig_autosw))
5008 		pr_err("error while trying to restore original video autoswitch mode\n");
5009 }
5010 
5011 static int video_outputsw_get(void)
5012 {
5013 	int status = 0;
5014 	int i;
5015 
5016 	switch (video_supported) {
5017 	case TPACPI_VIDEO_570:
5018 		if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
5019 				 TP_ACPI_VIDEO_570_PHSCMD))
5020 			return -EIO;
5021 		status = i & TP_ACPI_VIDEO_570_PHSMASK;
5022 		break;
5023 	case TPACPI_VIDEO_770:
5024 		if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
5025 			return -EIO;
5026 		if (i)
5027 			status |= TP_ACPI_VIDEO_S_LCD;
5028 		if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
5029 			return -EIO;
5030 		if (i)
5031 			status |= TP_ACPI_VIDEO_S_CRT;
5032 		break;
5033 	case TPACPI_VIDEO_NEW:
5034 		if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
5035 		    !acpi_evalf(NULL, &i, "\\VCDC", "d"))
5036 			return -EIO;
5037 		if (i)
5038 			status |= TP_ACPI_VIDEO_S_CRT;
5039 
5040 		if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
5041 		    !acpi_evalf(NULL, &i, "\\VCDL", "d"))
5042 			return -EIO;
5043 		if (i)
5044 			status |= TP_ACPI_VIDEO_S_LCD;
5045 		if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
5046 			return -EIO;
5047 		if (i)
5048 			status |= TP_ACPI_VIDEO_S_DVI;
5049 		break;
5050 	default:
5051 		return -ENOSYS;
5052 	}
5053 
5054 	return status;
5055 }
5056 
5057 static int video_outputsw_set(int status)
5058 {
5059 	int autosw;
5060 	int res = 0;
5061 
5062 	switch (video_supported) {
5063 	case TPACPI_VIDEO_570:
5064 		res = acpi_evalf(NULL, NULL,
5065 				 "\\_SB.PHS2", "vdd",
5066 				 TP_ACPI_VIDEO_570_PHS2CMD,
5067 				 status | TP_ACPI_VIDEO_570_PHS2SET);
5068 		break;
5069 	case TPACPI_VIDEO_770:
5070 		autosw = video_autosw_get();
5071 		if (autosw < 0)
5072 			return autosw;
5073 
5074 		res = video_autosw_set(1);
5075 		if (res)
5076 			return res;
5077 		res = acpi_evalf(vid_handle, NULL,
5078 				 "ASWT", "vdd", status * 0x100, 0);
5079 		if (!autosw && video_autosw_set(autosw)) {
5080 			pr_err("video auto-switch left enabled due to error\n");
5081 			return -EIO;
5082 		}
5083 		break;
5084 	case TPACPI_VIDEO_NEW:
5085 		res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
5086 		      acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
5087 		break;
5088 	default:
5089 		return -ENOSYS;
5090 	}
5091 
5092 	return (res) ? 0 : -EIO;
5093 }
5094 
5095 static int video_autosw_get(void)
5096 {
5097 	int autosw = 0;
5098 
5099 	switch (video_supported) {
5100 	case TPACPI_VIDEO_570:
5101 		if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
5102 			return -EIO;
5103 		break;
5104 	case TPACPI_VIDEO_770:
5105 	case TPACPI_VIDEO_NEW:
5106 		if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
5107 			return -EIO;
5108 		break;
5109 	default:
5110 		return -ENOSYS;
5111 	}
5112 
5113 	return autosw & 1;
5114 }
5115 
5116 static int video_autosw_set(int enable)
5117 {
5118 	if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable) ? 1 : 0))
5119 		return -EIO;
5120 	return 0;
5121 }
5122 
5123 static int video_outputsw_cycle(void)
5124 {
5125 	int autosw = video_autosw_get();
5126 	int res;
5127 
5128 	if (autosw < 0)
5129 		return autosw;
5130 
5131 	switch (video_supported) {
5132 	case TPACPI_VIDEO_570:
5133 		res = video_autosw_set(1);
5134 		if (res)
5135 			return res;
5136 		res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
5137 		break;
5138 	case TPACPI_VIDEO_770:
5139 	case TPACPI_VIDEO_NEW:
5140 		res = video_autosw_set(1);
5141 		if (res)
5142 			return res;
5143 		res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
5144 		break;
5145 	default:
5146 		return -ENOSYS;
5147 	}
5148 	if (!autosw && video_autosw_set(autosw)) {
5149 		pr_err("video auto-switch left enabled due to error\n");
5150 		return -EIO;
5151 	}
5152 
5153 	return (res) ? 0 : -EIO;
5154 }
5155 
5156 static int video_expand_toggle(void)
5157 {
5158 	switch (video_supported) {
5159 	case TPACPI_VIDEO_570:
5160 		return acpi_evalf(ec_handle, NULL, "_Q17", "v") ?
5161 			0 : -EIO;
5162 	case TPACPI_VIDEO_770:
5163 		return acpi_evalf(vid_handle, NULL, "VEXP", "v") ?
5164 			0 : -EIO;
5165 	case TPACPI_VIDEO_NEW:
5166 		return acpi_evalf(NULL, NULL, "\\VEXP", "v") ?
5167 			0 : -EIO;
5168 	default:
5169 		return -ENOSYS;
5170 	}
5171 	/* not reached */
5172 }
5173 
5174 static int video_read(struct seq_file *m)
5175 {
5176 	int status, autosw;
5177 
5178 	if (video_supported == TPACPI_VIDEO_NONE) {
5179 		seq_printf(m, "status:\t\tnot supported\n");
5180 		return 0;
5181 	}
5182 
5183 	/* Even reads can crash X.org, so... */
5184 	if (!capable(CAP_SYS_ADMIN))
5185 		return -EPERM;
5186 
5187 	status = video_outputsw_get();
5188 	if (status < 0)
5189 		return status;
5190 
5191 	autosw = video_autosw_get();
5192 	if (autosw < 0)
5193 		return autosw;
5194 
5195 	seq_printf(m, "status:\t\tsupported\n");
5196 	seq_printf(m, "lcd:\t\t%s\n", str_enabled_disabled(status & BIT(0)));
5197 	seq_printf(m, "crt:\t\t%s\n", str_enabled_disabled(status & BIT(1)));
5198 	if (video_supported == TPACPI_VIDEO_NEW)
5199 		seq_printf(m, "dvi:\t\t%s\n", str_enabled_disabled(status & BIT(3)));
5200 	seq_printf(m, "auto:\t\t%s\n", str_enabled_disabled(autosw & BIT(0)));
5201 	seq_printf(m, "commands:\tlcd_enable, lcd_disable\n");
5202 	seq_printf(m, "commands:\tcrt_enable, crt_disable\n");
5203 	if (video_supported == TPACPI_VIDEO_NEW)
5204 		seq_printf(m, "commands:\tdvi_enable, dvi_disable\n");
5205 	seq_printf(m, "commands:\tauto_enable, auto_disable\n");
5206 	seq_printf(m, "commands:\tvideo_switch, expand_toggle\n");
5207 
5208 	return 0;
5209 }
5210 
5211 static int video_write(char *buf)
5212 {
5213 	char *cmd;
5214 	int enable, disable, status;
5215 	int res;
5216 
5217 	if (video_supported == TPACPI_VIDEO_NONE)
5218 		return -ENODEV;
5219 
5220 	/* Even reads can crash X.org, let alone writes... */
5221 	if (!capable(CAP_SYS_ADMIN))
5222 		return -EPERM;
5223 
5224 	enable = 0;
5225 	disable = 0;
5226 
5227 	while ((cmd = strsep(&buf, ","))) {
5228 		if (strlencmp(cmd, "lcd_enable") == 0) {
5229 			enable |= TP_ACPI_VIDEO_S_LCD;
5230 		} else if (strlencmp(cmd, "lcd_disable") == 0) {
5231 			disable |= TP_ACPI_VIDEO_S_LCD;
5232 		} else if (strlencmp(cmd, "crt_enable") == 0) {
5233 			enable |= TP_ACPI_VIDEO_S_CRT;
5234 		} else if (strlencmp(cmd, "crt_disable") == 0) {
5235 			disable |= TP_ACPI_VIDEO_S_CRT;
5236 		} else if (video_supported == TPACPI_VIDEO_NEW &&
5237 			   strlencmp(cmd, "dvi_enable") == 0) {
5238 			enable |= TP_ACPI_VIDEO_S_DVI;
5239 		} else if (video_supported == TPACPI_VIDEO_NEW &&
5240 			   strlencmp(cmd, "dvi_disable") == 0) {
5241 			disable |= TP_ACPI_VIDEO_S_DVI;
5242 		} else if (strlencmp(cmd, "auto_enable") == 0) {
5243 			res = video_autosw_set(1);
5244 			if (res)
5245 				return res;
5246 		} else if (strlencmp(cmd, "auto_disable") == 0) {
5247 			res = video_autosw_set(0);
5248 			if (res)
5249 				return res;
5250 		} else if (strlencmp(cmd, "video_switch") == 0) {
5251 			res = video_outputsw_cycle();
5252 			if (res)
5253 				return res;
5254 		} else if (strlencmp(cmd, "expand_toggle") == 0) {
5255 			res = video_expand_toggle();
5256 			if (res)
5257 				return res;
5258 		} else
5259 			return -EINVAL;
5260 	}
5261 
5262 	if (enable || disable) {
5263 		status = video_outputsw_get();
5264 		if (status < 0)
5265 			return status;
5266 		res = video_outputsw_set((status & ~disable) | enable);
5267 		if (res)
5268 			return res;
5269 	}
5270 
5271 	return 0;
5272 }
5273 
5274 static struct ibm_struct video_driver_data = {
5275 	.name = "video",
5276 	.read = video_read,
5277 	.write = video_write,
5278 	.exit = video_exit,
5279 };
5280 
5281 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */
5282 
5283 /*************************************************************************
5284  * Keyboard backlight subdriver
5285  */
5286 
5287 static enum led_brightness kbdlight_brightness;
5288 static DEFINE_MUTEX(kbdlight_mutex);
5289 
5290 static int kbdlight_set_level(int level)
5291 {
5292 	int ret = 0;
5293 
5294 	if (!hkey_handle)
5295 		return -ENXIO;
5296 
5297 	mutex_lock(&kbdlight_mutex);
5298 
5299 	if (!acpi_evalf(hkey_handle, NULL, "MLCS", "dd", level))
5300 		ret = -EIO;
5301 	else
5302 		kbdlight_brightness = level;
5303 
5304 	mutex_unlock(&kbdlight_mutex);
5305 
5306 	return ret;
5307 }
5308 
5309 static int kbdlight_get_level(void)
5310 {
5311 	int status = 0;
5312 
5313 	if (!hkey_handle)
5314 		return -ENXIO;
5315 
5316 	if (!acpi_evalf(hkey_handle, &status, "MLCG", "dd", 0))
5317 		return -EIO;
5318 
5319 	if (status < 0)
5320 		return status;
5321 
5322 	return status & 0x3;
5323 }
5324 
5325 static bool kbdlight_is_supported(void)
5326 {
5327 	int status = 0;
5328 
5329 	if (!hkey_handle)
5330 		return false;
5331 
5332 	if (!acpi_has_method(hkey_handle, "MLCG")) {
5333 		vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG is unavailable\n");
5334 		return false;
5335 	}
5336 
5337 	if (!acpi_evalf(hkey_handle, &status, "MLCG", "qdd", 0)) {
5338 		vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG failed\n");
5339 		return false;
5340 	}
5341 
5342 	if (status < 0) {
5343 		vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG err: %d\n", status);
5344 		return false;
5345 	}
5346 
5347 	vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG returned 0x%x\n", status);
5348 	/*
5349 	 * Guessed test for keyboard backlight:
5350 	 *
5351 	 * Machines with backlight keyboard return:
5352 	 *   b010100000010000000XX - ThinkPad X1 Carbon 3rd
5353 	 *   b110100010010000000XX - ThinkPad x230
5354 	 *   b010100000010000000XX - ThinkPad x240
5355 	 *   b010100000010000000XX - ThinkPad W541
5356 	 * (XX is current backlight level)
5357 	 *
5358 	 * Machines without backlight keyboard return:
5359 	 *   b10100001000000000000 - ThinkPad x230
5360 	 *   b10110001000000000000 - ThinkPad E430
5361 	 *   b00000000000000000000 - ThinkPad E450
5362 	 *
5363 	 * Candidate BITs for detection test (XOR):
5364 	 *   b01000000001000000000
5365 	 *              ^
5366 	 */
5367 	return status & BIT(9);
5368 }
5369 
5370 static int kbdlight_sysfs_set(struct led_classdev *led_cdev,
5371 			enum led_brightness brightness)
5372 {
5373 	return kbdlight_set_level(brightness);
5374 }
5375 
5376 static enum led_brightness kbdlight_sysfs_get(struct led_classdev *led_cdev)
5377 {
5378 	int level;
5379 
5380 	level = kbdlight_get_level();
5381 	if (level < 0)
5382 		return 0;
5383 
5384 	return level;
5385 }
5386 
5387 static struct tpacpi_led_classdev tpacpi_led_kbdlight = {
5388 	.led_classdev = {
5389 		.name		= "tpacpi::kbd_backlight",
5390 		.max_brightness	= 2,
5391 		.flags		= LED_BRIGHT_HW_CHANGED,
5392 		.brightness_set_blocking = &kbdlight_sysfs_set,
5393 		.brightness_get	= &kbdlight_sysfs_get,
5394 	}
5395 };
5396 
5397 static int __init kbdlight_init(struct ibm_init_struct *iibm)
5398 {
5399 	int rc;
5400 
5401 	vdbg_printk(TPACPI_DBG_INIT, "initializing kbdlight subdriver\n");
5402 
5403 	TPACPI_ACPIHANDLE_INIT(hkey);
5404 
5405 	if (!kbdlight_is_supported()) {
5406 		tp_features.kbdlight = 0;
5407 		vdbg_printk(TPACPI_DBG_INIT, "kbdlight is unsupported\n");
5408 		return -ENODEV;
5409 	}
5410 
5411 	kbdlight_brightness = kbdlight_sysfs_get(NULL);
5412 	tp_features.kbdlight = 1;
5413 
5414 	rc = led_classdev_register(&tpacpi_pdev->dev,
5415 				   &tpacpi_led_kbdlight.led_classdev);
5416 	if (rc < 0) {
5417 		tp_features.kbdlight = 0;
5418 		return rc;
5419 	}
5420 
5421 	tpacpi_hotkey_driver_mask_set(hotkey_driver_mask |
5422 				      TP_ACPI_HKEY_KBD_LIGHT_MASK);
5423 	return 0;
5424 }
5425 
5426 static void kbdlight_exit(void)
5427 {
5428 	led_classdev_unregister(&tpacpi_led_kbdlight.led_classdev);
5429 }
5430 
5431 static int kbdlight_set_level_and_update(int level)
5432 {
5433 	int ret;
5434 	struct led_classdev *led_cdev;
5435 
5436 	ret = kbdlight_set_level(level);
5437 	led_cdev = &tpacpi_led_kbdlight.led_classdev;
5438 
5439 	if (ret == 0 && !(led_cdev->flags & LED_SUSPENDED))
5440 		led_cdev->brightness = level;
5441 
5442 	return ret;
5443 }
5444 
5445 static int kbdlight_read(struct seq_file *m)
5446 {
5447 	int level;
5448 
5449 	if (!tp_features.kbdlight) {
5450 		seq_printf(m, "status:\t\tnot supported\n");
5451 	} else {
5452 		level = kbdlight_get_level();
5453 		if (level < 0)
5454 			seq_printf(m, "status:\t\terror %d\n", level);
5455 		else
5456 			seq_printf(m, "status:\t\t%d\n", level);
5457 		seq_printf(m, "commands:\t0, 1, 2\n");
5458 	}
5459 
5460 	return 0;
5461 }
5462 
5463 static int kbdlight_write(char *buf)
5464 {
5465 	char *cmd;
5466 	int res, level = -EINVAL;
5467 
5468 	if (!tp_features.kbdlight)
5469 		return -ENODEV;
5470 
5471 	while ((cmd = strsep(&buf, ","))) {
5472 		res = kstrtoint(cmd, 10, &level);
5473 		if (res < 0)
5474 			return res;
5475 	}
5476 
5477 	if (level >= 3 || level < 0)
5478 		return -EINVAL;
5479 
5480 	return kbdlight_set_level_and_update(level);
5481 }
5482 
5483 static void kbdlight_suspend(void)
5484 {
5485 	struct led_classdev *led_cdev;
5486 
5487 	if (!tp_features.kbdlight)
5488 		return;
5489 
5490 	led_cdev = &tpacpi_led_kbdlight.led_classdev;
5491 	led_update_brightness(led_cdev);
5492 	led_classdev_suspend(led_cdev);
5493 }
5494 
5495 static void kbdlight_resume(void)
5496 {
5497 	if (!tp_features.kbdlight)
5498 		return;
5499 
5500 	led_classdev_resume(&tpacpi_led_kbdlight.led_classdev);
5501 }
5502 
5503 static struct ibm_struct kbdlight_driver_data = {
5504 	.name = "kbdlight",
5505 	.read = kbdlight_read,
5506 	.write = kbdlight_write,
5507 	.suspend = kbdlight_suspend,
5508 	.resume = kbdlight_resume,
5509 	.exit = kbdlight_exit,
5510 };
5511 
5512 /*************************************************************************
5513  * Light (thinklight) subdriver
5514  */
5515 
5516 TPACPI_HANDLE(lght, root, "\\LGHT");	/* A21e, A2xm/p, T20-22, X20-21 */
5517 TPACPI_HANDLE(ledb, ec, "LEDB");		/* G4x */
5518 
5519 static int light_get_status(void)
5520 {
5521 	int status = 0;
5522 
5523 	if (tp_features.light_status) {
5524 		if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
5525 			return -EIO;
5526 		return (!!status);
5527 	}
5528 
5529 	return -ENXIO;
5530 }
5531 
5532 static int light_set_status(int status)
5533 {
5534 	int rc;
5535 
5536 	if (tp_features.light) {
5537 		if (cmos_handle) {
5538 			rc = acpi_evalf(cmos_handle, NULL, NULL, "vd",
5539 					(status) ?
5540 						TP_CMOS_THINKLIGHT_ON :
5541 						TP_CMOS_THINKLIGHT_OFF);
5542 		} else {
5543 			rc = acpi_evalf(lght_handle, NULL, NULL, "vd",
5544 					(status) ? 1 : 0);
5545 		}
5546 		return (rc) ? 0 : -EIO;
5547 	}
5548 
5549 	return -ENXIO;
5550 }
5551 
5552 static int light_sysfs_set(struct led_classdev *led_cdev,
5553 			enum led_brightness brightness)
5554 {
5555 	return light_set_status((brightness != LED_OFF) ?
5556 				TPACPI_LED_ON : TPACPI_LED_OFF);
5557 }
5558 
5559 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev)
5560 {
5561 	return (light_get_status() == 1) ? LED_FULL : LED_OFF;
5562 }
5563 
5564 static struct tpacpi_led_classdev tpacpi_led_thinklight = {
5565 	.led_classdev = {
5566 		.name		= "tpacpi::thinklight",
5567 		.brightness_set_blocking = &light_sysfs_set,
5568 		.brightness_get	= &light_sysfs_get,
5569 	}
5570 };
5571 
5572 static int __init light_init(struct ibm_init_struct *iibm)
5573 {
5574 	int rc;
5575 
5576 	vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
5577 
5578 	if (tpacpi_is_ibm()) {
5579 		TPACPI_ACPIHANDLE_INIT(ledb);
5580 		TPACPI_ACPIHANDLE_INIT(lght);
5581 	}
5582 	TPACPI_ACPIHANDLE_INIT(cmos);
5583 
5584 	/* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
5585 	tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
5586 
5587 	if (tp_features.light)
5588 		/* light status not supported on
5589 		   570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
5590 		tp_features.light_status =
5591 			acpi_evalf(ec_handle, NULL, "KBLT", "qv");
5592 
5593 	vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n",
5594 		str_supported(tp_features.light),
5595 		str_supported(tp_features.light_status));
5596 
5597 	if (!tp_features.light)
5598 		return -ENODEV;
5599 
5600 	rc = led_classdev_register(&tpacpi_pdev->dev,
5601 				   &tpacpi_led_thinklight.led_classdev);
5602 
5603 	if (rc < 0) {
5604 		tp_features.light = 0;
5605 		tp_features.light_status = 0;
5606 	} else  {
5607 		rc = 0;
5608 	}
5609 
5610 	return rc;
5611 }
5612 
5613 static void light_exit(void)
5614 {
5615 	led_classdev_unregister(&tpacpi_led_thinklight.led_classdev);
5616 }
5617 
5618 static int light_read(struct seq_file *m)
5619 {
5620 	int status;
5621 
5622 	if (!tp_features.light) {
5623 		seq_printf(m, "status:\t\tnot supported\n");
5624 	} else if (!tp_features.light_status) {
5625 		seq_printf(m, "status:\t\tunknown\n");
5626 		seq_printf(m, "commands:\ton, off\n");
5627 	} else {
5628 		status = light_get_status();
5629 		if (status < 0)
5630 			return status;
5631 		seq_printf(m, "status:\t\t%s\n", str_on_off(status & BIT(0)));
5632 		seq_printf(m, "commands:\ton, off\n");
5633 	}
5634 
5635 	return 0;
5636 }
5637 
5638 static int light_write(char *buf)
5639 {
5640 	char *cmd;
5641 	int newstatus = 0;
5642 
5643 	if (!tp_features.light)
5644 		return -ENODEV;
5645 
5646 	while ((cmd = strsep(&buf, ","))) {
5647 		if (strlencmp(cmd, "on") == 0) {
5648 			newstatus = 1;
5649 		} else if (strlencmp(cmd, "off") == 0) {
5650 			newstatus = 0;
5651 		} else
5652 			return -EINVAL;
5653 	}
5654 
5655 	return light_set_status(newstatus);
5656 }
5657 
5658 static struct ibm_struct light_driver_data = {
5659 	.name = "light",
5660 	.read = light_read,
5661 	.write = light_write,
5662 	.exit = light_exit,
5663 };
5664 
5665 /*************************************************************************
5666  * CMOS subdriver
5667  */
5668 
5669 /* sysfs cmos_command -------------------------------------------------- */
5670 static ssize_t cmos_command_store(struct device *dev,
5671 			    struct device_attribute *attr,
5672 			    const char *buf, size_t count)
5673 {
5674 	unsigned long cmos_cmd;
5675 	int res;
5676 
5677 	if (parse_strtoul(buf, 21, &cmos_cmd))
5678 		return -EINVAL;
5679 
5680 	res = issue_thinkpad_cmos_command(cmos_cmd);
5681 	return (res) ? res : count;
5682 }
5683 
5684 static DEVICE_ATTR_WO(cmos_command);
5685 
5686 static struct attribute *cmos_attributes[] = {
5687 	&dev_attr_cmos_command.attr,
5688 	NULL
5689 };
5690 
5691 static umode_t cmos_attr_is_visible(struct kobject *kobj,
5692 				    struct attribute *attr, int n)
5693 {
5694 	return cmos_handle ? attr->mode : 0;
5695 }
5696 
5697 static const struct attribute_group cmos_attr_group = {
5698 	.is_visible = cmos_attr_is_visible,
5699 	.attrs = cmos_attributes,
5700 };
5701 
5702 /* --------------------------------------------------------------------- */
5703 
5704 static int __init cmos_init(struct ibm_init_struct *iibm)
5705 {
5706 	vdbg_printk(TPACPI_DBG_INIT,
5707 		    "initializing cmos commands subdriver\n");
5708 
5709 	TPACPI_ACPIHANDLE_INIT(cmos);
5710 
5711 	vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
5712 		    str_supported(cmos_handle != NULL));
5713 
5714 	return cmos_handle ? 0 : -ENODEV;
5715 }
5716 
5717 static int cmos_read(struct seq_file *m)
5718 {
5719 	/* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
5720 	   R30, R31, T20-22, X20-21 */
5721 	if (!cmos_handle)
5722 		seq_printf(m, "status:\t\tnot supported\n");
5723 	else {
5724 		seq_printf(m, "status:\t\tsupported\n");
5725 		seq_printf(m, "commands:\t<cmd> (<cmd> is 0-21)\n");
5726 	}
5727 
5728 	return 0;
5729 }
5730 
5731 static int cmos_write(char *buf)
5732 {
5733 	char *cmd;
5734 	int cmos_cmd, res;
5735 
5736 	while ((cmd = strsep(&buf, ","))) {
5737 		if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
5738 		    cmos_cmd >= 0 && cmos_cmd <= 21) {
5739 			/* cmos_cmd set */
5740 		} else
5741 			return -EINVAL;
5742 
5743 		res = issue_thinkpad_cmos_command(cmos_cmd);
5744 		if (res)
5745 			return res;
5746 	}
5747 
5748 	return 0;
5749 }
5750 
5751 static struct ibm_struct cmos_driver_data = {
5752 	.name = "cmos",
5753 	.read = cmos_read,
5754 	.write = cmos_write,
5755 };
5756 
5757 /*************************************************************************
5758  * LED subdriver
5759  */
5760 
5761 enum led_access_mode {
5762 	TPACPI_LED_NONE = 0,
5763 	TPACPI_LED_570,	/* 570 */
5764 	TPACPI_LED_OLD,	/* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
5765 	TPACPI_LED_NEW,	/* all others */
5766 };
5767 
5768 enum {	/* For TPACPI_LED_OLD */
5769 	TPACPI_LED_EC_HLCL = 0x0c,	/* EC reg to get led to power on */
5770 	TPACPI_LED_EC_HLBL = 0x0d,	/* EC reg to blink a lit led */
5771 	TPACPI_LED_EC_HLMS = 0x0e,	/* EC reg to select led to command */
5772 };
5773 
5774 static enum led_access_mode led_supported;
5775 
5776 static acpi_handle led_handle;
5777 
5778 #define TPACPI_LED_NUMLEDS 16
5779 static struct tpacpi_led_classdev *tpacpi_leds;
5780 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS];
5781 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = {
5782 	/* there's a limit of 19 chars + NULL before 2.6.26 */
5783 	"tpacpi::power",
5784 	"tpacpi:orange:batt",
5785 	"tpacpi:green:batt",
5786 	"tpacpi::dock_active",
5787 	"tpacpi::bay_active",
5788 	"tpacpi::dock_batt",
5789 	"tpacpi::unknown_led",
5790 	"tpacpi::standby",
5791 	"tpacpi::dock_status1",
5792 	"tpacpi::dock_status2",
5793 	"tpacpi::lid_logo_dot",
5794 	"tpacpi::unknown_led3",
5795 	"tpacpi::thinkvantage",
5796 };
5797 #define TPACPI_SAFE_LEDS	0x1481U
5798 
5799 static inline bool tpacpi_is_led_restricted(const unsigned int led)
5800 {
5801 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
5802 	return false;
5803 #else
5804 	return (1U & (TPACPI_SAFE_LEDS >> led)) == 0;
5805 #endif
5806 }
5807 
5808 static int led_get_status(const unsigned int led)
5809 {
5810 	int status;
5811 	enum led_status_t led_s;
5812 
5813 	switch (led_supported) {
5814 	case TPACPI_LED_570:
5815 		if (!acpi_evalf(ec_handle,
5816 				&status, "GLED", "dd", 1 << led))
5817 			return -EIO;
5818 		led_s = (status == 0) ?
5819 				TPACPI_LED_OFF :
5820 				((status == 1) ?
5821 					TPACPI_LED_ON :
5822 					TPACPI_LED_BLINK);
5823 		tpacpi_led_state_cache[led] = led_s;
5824 		return led_s;
5825 	default:
5826 		return -ENXIO;
5827 	}
5828 
5829 	/* not reached */
5830 }
5831 
5832 static int led_set_status(const unsigned int led,
5833 			  const enum led_status_t ledstatus)
5834 {
5835 	/* off, on, blink. Index is led_status_t */
5836 	static const unsigned int led_sled_arg1[] = { 0, 1, 3 };
5837 	static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 };
5838 
5839 	int rc = 0;
5840 
5841 	switch (led_supported) {
5842 	case TPACPI_LED_570:
5843 		/* 570 */
5844 		if (unlikely(led > 7))
5845 			return -EINVAL;
5846 		if (unlikely(tpacpi_is_led_restricted(led)))
5847 			return -EPERM;
5848 		if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
5849 				(1 << led), led_sled_arg1[ledstatus]))
5850 			return -EIO;
5851 		break;
5852 	case TPACPI_LED_OLD:
5853 		/* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
5854 		if (unlikely(led > 7))
5855 			return -EINVAL;
5856 		if (unlikely(tpacpi_is_led_restricted(led)))
5857 			return -EPERM;
5858 		rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led));
5859 		if (rc >= 0)
5860 			rc = ec_write(TPACPI_LED_EC_HLBL,
5861 				      (ledstatus == TPACPI_LED_BLINK) << led);
5862 		if (rc >= 0)
5863 			rc = ec_write(TPACPI_LED_EC_HLCL,
5864 				      (ledstatus != TPACPI_LED_OFF) << led);
5865 		break;
5866 	case TPACPI_LED_NEW:
5867 		/* all others */
5868 		if (unlikely(led >= TPACPI_LED_NUMLEDS))
5869 			return -EINVAL;
5870 		if (unlikely(tpacpi_is_led_restricted(led)))
5871 			return -EPERM;
5872 		if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
5873 				led, led_led_arg1[ledstatus]))
5874 			return -EIO;
5875 		break;
5876 	default:
5877 		return -ENXIO;
5878 	}
5879 
5880 	if (!rc)
5881 		tpacpi_led_state_cache[led] = ledstatus;
5882 
5883 	return rc;
5884 }
5885 
5886 static int led_sysfs_set(struct led_classdev *led_cdev,
5887 			enum led_brightness brightness)
5888 {
5889 	struct tpacpi_led_classdev *data = container_of(led_cdev,
5890 			     struct tpacpi_led_classdev, led_classdev);
5891 	enum led_status_t new_state;
5892 
5893 	if (brightness == LED_OFF)
5894 		new_state = TPACPI_LED_OFF;
5895 	else if (tpacpi_led_state_cache[data->led] != TPACPI_LED_BLINK)
5896 		new_state = TPACPI_LED_ON;
5897 	else
5898 		new_state = TPACPI_LED_BLINK;
5899 
5900 	return led_set_status(data->led, new_state);
5901 }
5902 
5903 static int led_sysfs_blink_set(struct led_classdev *led_cdev,
5904 			unsigned long *delay_on, unsigned long *delay_off)
5905 {
5906 	struct tpacpi_led_classdev *data = container_of(led_cdev,
5907 			     struct tpacpi_led_classdev, led_classdev);
5908 
5909 	/* Can we choose the flash rate? */
5910 	if (*delay_on == 0 && *delay_off == 0) {
5911 		/* yes. set them to the hardware blink rate (1 Hz) */
5912 		*delay_on = 500; /* ms */
5913 		*delay_off = 500; /* ms */
5914 	} else if ((*delay_on != 500) || (*delay_off != 500))
5915 		return -EINVAL;
5916 
5917 	return led_set_status(data->led, TPACPI_LED_BLINK);
5918 }
5919 
5920 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev)
5921 {
5922 	int rc;
5923 
5924 	struct tpacpi_led_classdev *data = container_of(led_cdev,
5925 			     struct tpacpi_led_classdev, led_classdev);
5926 
5927 	rc = led_get_status(data->led);
5928 
5929 	if (rc == TPACPI_LED_OFF || rc < 0)
5930 		rc = LED_OFF;	/* no error handling in led class :( */
5931 	else
5932 		rc = LED_FULL;
5933 
5934 	return rc;
5935 }
5936 
5937 static void led_exit(void)
5938 {
5939 	unsigned int i;
5940 
5941 	for (i = 0; i < TPACPI_LED_NUMLEDS; i++)
5942 		led_classdev_unregister(&tpacpi_leds[i].led_classdev);
5943 
5944 	kfree(tpacpi_leds);
5945 }
5946 
5947 static int __init tpacpi_init_led(unsigned int led)
5948 {
5949 	/* LEDs with no name don't get registered */
5950 	if (!tpacpi_led_names[led])
5951 		return 0;
5952 
5953 	tpacpi_leds[led].led_classdev.brightness_set_blocking = &led_sysfs_set;
5954 	tpacpi_leds[led].led_classdev.blink_set = &led_sysfs_blink_set;
5955 	if (led_supported == TPACPI_LED_570)
5956 		tpacpi_leds[led].led_classdev.brightness_get = &led_sysfs_get;
5957 
5958 	tpacpi_leds[led].led_classdev.name = tpacpi_led_names[led];
5959 	tpacpi_leds[led].led_classdev.flags = LED_RETAIN_AT_SHUTDOWN;
5960 	tpacpi_leds[led].led = led;
5961 
5962 	return led_classdev_register(&tpacpi_pdev->dev, &tpacpi_leds[led].led_classdev);
5963 }
5964 
5965 static const struct tpacpi_quirk led_useful_qtable[] __initconst = {
5966 	TPACPI_Q_IBM('1', 'E', 0x009f), /* A30 */
5967 	TPACPI_Q_IBM('1', 'N', 0x009f), /* A31 */
5968 	TPACPI_Q_IBM('1', 'G', 0x009f), /* A31 */
5969 
5970 	TPACPI_Q_IBM('1', 'I', 0x0097), /* T30 */
5971 	TPACPI_Q_IBM('1', 'R', 0x0097), /* T40, T41, T42, R50, R51 */
5972 	TPACPI_Q_IBM('7', '0', 0x0097), /* T43, R52 */
5973 	TPACPI_Q_IBM('1', 'Y', 0x0097), /* T43 */
5974 	TPACPI_Q_IBM('1', 'W', 0x0097), /* R50e */
5975 	TPACPI_Q_IBM('1', 'V', 0x0097), /* R51 */
5976 	TPACPI_Q_IBM('7', '8', 0x0097), /* R51e */
5977 	TPACPI_Q_IBM('7', '6', 0x0097), /* R52 */
5978 
5979 	TPACPI_Q_IBM('1', 'K', 0x00bf), /* X30 */
5980 	TPACPI_Q_IBM('1', 'Q', 0x00bf), /* X31, X32 */
5981 	TPACPI_Q_IBM('1', 'U', 0x00bf), /* X40 */
5982 	TPACPI_Q_IBM('7', '4', 0x00bf), /* X41 */
5983 	TPACPI_Q_IBM('7', '5', 0x00bf), /* X41t */
5984 
5985 	TPACPI_Q_IBM('7', '9', 0x1f97), /* T60 (1) */
5986 	TPACPI_Q_IBM('7', '7', 0x1f97), /* Z60* (1) */
5987 	TPACPI_Q_IBM('7', 'F', 0x1f97), /* Z61* (1) */
5988 	TPACPI_Q_IBM('7', 'B', 0x1fb7), /* X60 (1) */
5989 
5990 	/* (1) - may have excess leds enabled on MSB */
5991 
5992 	/* Defaults (order matters, keep last, don't reorder!) */
5993 	{ /* Lenovo */
5994 	  .vendor = PCI_VENDOR_ID_LENOVO,
5995 	  .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
5996 	  .quirks = 0x1fffU,
5997 	},
5998 	{ /* IBM ThinkPads with no EC version string */
5999 	  .vendor = PCI_VENDOR_ID_IBM,
6000 	  .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_UNKNOWN,
6001 	  .quirks = 0x00ffU,
6002 	},
6003 	{ /* IBM ThinkPads with EC version string */
6004 	  .vendor = PCI_VENDOR_ID_IBM,
6005 	  .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
6006 	  .quirks = 0x00bfU,
6007 	},
6008 };
6009 
6010 static enum led_access_mode __init led_init_detect_mode(void)
6011 {
6012 	acpi_status status;
6013 
6014 	if (tpacpi_is_ibm()) {
6015 		/* 570 */
6016 		status = acpi_get_handle(ec_handle, "SLED", &led_handle);
6017 		if (ACPI_SUCCESS(status))
6018 			return TPACPI_LED_570;
6019 
6020 		/* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
6021 		status = acpi_get_handle(ec_handle, "SYSL", &led_handle);
6022 		if (ACPI_SUCCESS(status))
6023 			return TPACPI_LED_OLD;
6024 	}
6025 
6026 	/* most others */
6027 	status = acpi_get_handle(ec_handle, "LED", &led_handle);
6028 	if (ACPI_SUCCESS(status))
6029 		return TPACPI_LED_NEW;
6030 
6031 	/* R30, R31, and unknown firmwares */
6032 	led_handle = NULL;
6033 	return TPACPI_LED_NONE;
6034 }
6035 
6036 static int __init led_init(struct ibm_init_struct *iibm)
6037 {
6038 	unsigned int i;
6039 	int rc;
6040 	unsigned long useful_leds;
6041 
6042 	vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
6043 
6044 	led_supported = led_init_detect_mode();
6045 
6046 	if (led_supported != TPACPI_LED_NONE) {
6047 		useful_leds = tpacpi_check_quirks(led_useful_qtable,
6048 				ARRAY_SIZE(led_useful_qtable));
6049 
6050 		if (!useful_leds) {
6051 			led_handle = NULL;
6052 			led_supported = TPACPI_LED_NONE;
6053 		}
6054 	}
6055 
6056 	vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
6057 		str_supported(led_supported), led_supported);
6058 
6059 	if (led_supported == TPACPI_LED_NONE)
6060 		return -ENODEV;
6061 
6062 	tpacpi_leds = kcalloc(TPACPI_LED_NUMLEDS, sizeof(*tpacpi_leds),
6063 			      GFP_KERNEL);
6064 	if (!tpacpi_leds) {
6065 		pr_err("Out of memory for LED data\n");
6066 		return -ENOMEM;
6067 	}
6068 
6069 	for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
6070 		tpacpi_leds[i].led = -1;
6071 
6072 		if (!tpacpi_is_led_restricted(i) && test_bit(i, &useful_leds)) {
6073 			rc = tpacpi_init_led(i);
6074 			if (rc < 0) {
6075 				led_exit();
6076 				return rc;
6077 			}
6078 		}
6079 	}
6080 
6081 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
6082 	pr_notice("warning: userspace override of important firmware LEDs is enabled\n");
6083 #endif
6084 	return 0;
6085 }
6086 
6087 #define str_led_status(s)	((s) >= TPACPI_LED_BLINK ? "blinking" : str_on_off(s))
6088 
6089 static int led_read(struct seq_file *m)
6090 {
6091 	if (!led_supported) {
6092 		seq_printf(m, "status:\t\tnot supported\n");
6093 		return 0;
6094 	}
6095 	seq_printf(m, "status:\t\tsupported\n");
6096 
6097 	if (led_supported == TPACPI_LED_570) {
6098 		/* 570 */
6099 		int i, status;
6100 		for (i = 0; i < 8; i++) {
6101 			status = led_get_status(i);
6102 			if (status < 0)
6103 				return -EIO;
6104 			seq_printf(m, "%d:\t\t%s\n", i, str_led_status(status));
6105 		}
6106 	}
6107 
6108 	seq_printf(m, "commands:\t<led> on, <led> off, <led> blink (<led> is 0-15)\n");
6109 
6110 	return 0;
6111 }
6112 
6113 static int led_write(char *buf)
6114 {
6115 	char *cmd;
6116 	int led, rc;
6117 	enum led_status_t s;
6118 
6119 	if (!led_supported)
6120 		return -ENODEV;
6121 
6122 	while ((cmd = strsep(&buf, ","))) {
6123 		if (sscanf(cmd, "%d", &led) != 1)
6124 			return -EINVAL;
6125 
6126 		if (led < 0 || led > (TPACPI_LED_NUMLEDS - 1))
6127 			return -ENODEV;
6128 
6129 		if (tpacpi_leds[led].led < 0)
6130 			return -ENODEV;
6131 
6132 		if (strstr(cmd, "off")) {
6133 			s = TPACPI_LED_OFF;
6134 		} else if (strstr(cmd, "on")) {
6135 			s = TPACPI_LED_ON;
6136 		} else if (strstr(cmd, "blink")) {
6137 			s = TPACPI_LED_BLINK;
6138 		} else {
6139 			return -EINVAL;
6140 		}
6141 
6142 		rc = led_set_status(led, s);
6143 		if (rc < 0)
6144 			return rc;
6145 	}
6146 
6147 	return 0;
6148 }
6149 
6150 static struct ibm_struct led_driver_data = {
6151 	.name = "led",
6152 	.read = led_read,
6153 	.write = led_write,
6154 	.exit = led_exit,
6155 };
6156 
6157 /*************************************************************************
6158  * Beep subdriver
6159  */
6160 
6161 TPACPI_HANDLE(beep, ec, "BEEP");	/* all except R30, R31 */
6162 
6163 #define TPACPI_BEEP_Q1 0x0001
6164 
6165 static const struct tpacpi_quirk beep_quirk_table[] __initconst = {
6166 	TPACPI_Q_IBM('I', 'M', TPACPI_BEEP_Q1), /* 570 */
6167 	TPACPI_Q_IBM('I', 'U', TPACPI_BEEP_Q1), /* 570E - unverified */
6168 };
6169 
6170 static int __init beep_init(struct ibm_init_struct *iibm)
6171 {
6172 	unsigned long quirks;
6173 
6174 	vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
6175 
6176 	TPACPI_ACPIHANDLE_INIT(beep);
6177 
6178 	vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
6179 		str_supported(beep_handle != NULL));
6180 
6181 	quirks = tpacpi_check_quirks(beep_quirk_table,
6182 				     ARRAY_SIZE(beep_quirk_table));
6183 
6184 	tp_features.beep_needs_two_args = !!(quirks & TPACPI_BEEP_Q1);
6185 
6186 	return (beep_handle) ? 0 : -ENODEV;
6187 }
6188 
6189 static int beep_read(struct seq_file *m)
6190 {
6191 	if (!beep_handle)
6192 		seq_printf(m, "status:\t\tnot supported\n");
6193 	else {
6194 		seq_printf(m, "status:\t\tsupported\n");
6195 		seq_printf(m, "commands:\t<cmd> (<cmd> is 0-17)\n");
6196 	}
6197 
6198 	return 0;
6199 }
6200 
6201 static int beep_write(char *buf)
6202 {
6203 	char *cmd;
6204 	int beep_cmd;
6205 
6206 	if (!beep_handle)
6207 		return -ENODEV;
6208 
6209 	while ((cmd = strsep(&buf, ","))) {
6210 		if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
6211 		    beep_cmd >= 0 && beep_cmd <= 17) {
6212 			/* beep_cmd set */
6213 		} else
6214 			return -EINVAL;
6215 		if (tp_features.beep_needs_two_args) {
6216 			if (!acpi_evalf(beep_handle, NULL, NULL, "vdd",
6217 					beep_cmd, 0))
6218 				return -EIO;
6219 		} else {
6220 			if (!acpi_evalf(beep_handle, NULL, NULL, "vd",
6221 					beep_cmd))
6222 				return -EIO;
6223 		}
6224 	}
6225 
6226 	return 0;
6227 }
6228 
6229 static struct ibm_struct beep_driver_data = {
6230 	.name = "beep",
6231 	.read = beep_read,
6232 	.write = beep_write,
6233 };
6234 
6235 /*************************************************************************
6236  * Thermal subdriver
6237  */
6238 
6239 enum thermal_access_mode {
6240 	TPACPI_THERMAL_NONE = 0,	/* No thermal support */
6241 	TPACPI_THERMAL_ACPI_TMP07,	/* Use ACPI TMP0-7 */
6242 	TPACPI_THERMAL_ACPI_UPDT,	/* Use ACPI TMP0-7 with UPDT */
6243 	TPACPI_THERMAL_TPEC_8,		/* Use ACPI EC regs, 8 sensors */
6244 	TPACPI_THERMAL_TPEC_16,		/* Use ACPI EC regs, 16 sensors */
6245 };
6246 
6247 enum { /* TPACPI_THERMAL_TPEC_* */
6248 	TP_EC_THERMAL_TMP0 = 0x78,	/* ACPI EC regs TMP 0..7 */
6249 	TP_EC_THERMAL_TMP8 = 0xC0,	/* ACPI EC regs TMP 8..15 */
6250 	TP_EC_FUNCREV      = 0xEF,      /* ACPI EC Functional revision */
6251 	TP_EC_THERMAL_TMP_NA = -128,	/* ACPI EC sensor not available */
6252 
6253 	TPACPI_THERMAL_SENSOR_NA = -128000, /* Sensor not available */
6254 };
6255 
6256 
6257 #define TPACPI_MAX_THERMAL_SENSORS 16	/* Max thermal sensors supported */
6258 struct ibm_thermal_sensors_struct {
6259 	s32 temp[TPACPI_MAX_THERMAL_SENSORS];
6260 };
6261 
6262 static enum thermal_access_mode thermal_read_mode;
6263 static bool thermal_use_labels;
6264 
6265 /* idx is zero-based */
6266 static int thermal_get_sensor(int idx, s32 *value)
6267 {
6268 	int t;
6269 	s8 tmp;
6270 	char tmpi[5];
6271 
6272 	t = TP_EC_THERMAL_TMP0;
6273 
6274 	switch (thermal_read_mode) {
6275 #if TPACPI_MAX_THERMAL_SENSORS >= 16
6276 	case TPACPI_THERMAL_TPEC_16:
6277 		if (idx >= 8 && idx <= 15) {
6278 			t = TP_EC_THERMAL_TMP8;
6279 			idx -= 8;
6280 		}
6281 #endif
6282 		fallthrough;
6283 	case TPACPI_THERMAL_TPEC_8:
6284 		if (idx <= 7) {
6285 			if (!acpi_ec_read(t + idx, &tmp))
6286 				return -EIO;
6287 			*value = tmp * 1000;
6288 			return 0;
6289 		}
6290 		break;
6291 
6292 	case TPACPI_THERMAL_ACPI_UPDT:
6293 		if (idx <= 7) {
6294 			snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
6295 			if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
6296 				return -EIO;
6297 			if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
6298 				return -EIO;
6299 			*value = (t - 2732) * 100;
6300 			return 0;
6301 		}
6302 		break;
6303 
6304 	case TPACPI_THERMAL_ACPI_TMP07:
6305 		if (idx <= 7) {
6306 			snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
6307 			if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
6308 				return -EIO;
6309 			if (t > 127 || t < -127)
6310 				t = TP_EC_THERMAL_TMP_NA;
6311 			*value = t * 1000;
6312 			return 0;
6313 		}
6314 		break;
6315 
6316 	case TPACPI_THERMAL_NONE:
6317 	default:
6318 		return -ENOSYS;
6319 	}
6320 
6321 	return -EINVAL;
6322 }
6323 
6324 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
6325 {
6326 	int res, i;
6327 	int n;
6328 
6329 	n = 8;
6330 	i = 0;
6331 
6332 	if (!s)
6333 		return -EINVAL;
6334 
6335 	if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
6336 		n = 16;
6337 
6338 	for (i = 0 ; i < n; i++) {
6339 		res = thermal_get_sensor(i, &s->temp[i]);
6340 		if (res)
6341 			return res;
6342 	}
6343 
6344 	return n;
6345 }
6346 
6347 static void thermal_dump_all_sensors(void)
6348 {
6349 	int n, i;
6350 	struct ibm_thermal_sensors_struct t;
6351 
6352 	n = thermal_get_sensors(&t);
6353 	if (n <= 0)
6354 		return;
6355 
6356 	pr_notice("temperatures (Celsius):");
6357 
6358 	for (i = 0; i < n; i++) {
6359 		if (t.temp[i] != TPACPI_THERMAL_SENSOR_NA)
6360 			pr_cont(" %d", (int)(t.temp[i] / 1000));
6361 		else
6362 			pr_cont(" N/A");
6363 	}
6364 
6365 	pr_cont("\n");
6366 }
6367 
6368 /* sysfs temp##_input -------------------------------------------------- */
6369 
6370 static ssize_t thermal_temp_input_show(struct device *dev,
6371 			   struct device_attribute *attr,
6372 			   char *buf)
6373 {
6374 	struct sensor_device_attribute *sensor_attr =
6375 					to_sensor_dev_attr(attr);
6376 	int idx = sensor_attr->index;
6377 	s32 value;
6378 	int res;
6379 
6380 	res = thermal_get_sensor(idx, &value);
6381 	if (res)
6382 		return res;
6383 	if (value == TPACPI_THERMAL_SENSOR_NA)
6384 		return -ENXIO;
6385 
6386 	return sysfs_emit(buf, "%d\n", value);
6387 }
6388 
6389 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
6390 	 SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \
6391 		     thermal_temp_input_show, NULL, _idxB)
6392 
6393 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
6394 	THERMAL_SENSOR_ATTR_TEMP(1, 0),
6395 	THERMAL_SENSOR_ATTR_TEMP(2, 1),
6396 	THERMAL_SENSOR_ATTR_TEMP(3, 2),
6397 	THERMAL_SENSOR_ATTR_TEMP(4, 3),
6398 	THERMAL_SENSOR_ATTR_TEMP(5, 4),
6399 	THERMAL_SENSOR_ATTR_TEMP(6, 5),
6400 	THERMAL_SENSOR_ATTR_TEMP(7, 6),
6401 	THERMAL_SENSOR_ATTR_TEMP(8, 7),
6402 	THERMAL_SENSOR_ATTR_TEMP(9, 8),
6403 	THERMAL_SENSOR_ATTR_TEMP(10, 9),
6404 	THERMAL_SENSOR_ATTR_TEMP(11, 10),
6405 	THERMAL_SENSOR_ATTR_TEMP(12, 11),
6406 	THERMAL_SENSOR_ATTR_TEMP(13, 12),
6407 	THERMAL_SENSOR_ATTR_TEMP(14, 13),
6408 	THERMAL_SENSOR_ATTR_TEMP(15, 14),
6409 	THERMAL_SENSOR_ATTR_TEMP(16, 15),
6410 };
6411 
6412 #define THERMAL_ATTRS(X) \
6413 	&sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
6414 
6415 static struct attribute *thermal_temp_input_attr[] = {
6416 	THERMAL_ATTRS(0),
6417 	THERMAL_ATTRS(1),
6418 	THERMAL_ATTRS(2),
6419 	THERMAL_ATTRS(3),
6420 	THERMAL_ATTRS(4),
6421 	THERMAL_ATTRS(5),
6422 	THERMAL_ATTRS(6),
6423 	THERMAL_ATTRS(7),
6424 	THERMAL_ATTRS(8),
6425 	THERMAL_ATTRS(9),
6426 	THERMAL_ATTRS(10),
6427 	THERMAL_ATTRS(11),
6428 	THERMAL_ATTRS(12),
6429 	THERMAL_ATTRS(13),
6430 	THERMAL_ATTRS(14),
6431 	THERMAL_ATTRS(15),
6432 	NULL
6433 };
6434 
6435 static umode_t thermal_attr_is_visible(struct kobject *kobj,
6436 				       struct attribute *attr, int n)
6437 {
6438 	if (thermal_read_mode == TPACPI_THERMAL_NONE)
6439 		return 0;
6440 
6441 	if (attr == THERMAL_ATTRS(8) || attr == THERMAL_ATTRS(9) ||
6442 	    attr == THERMAL_ATTRS(10) || attr == THERMAL_ATTRS(11) ||
6443 	    attr == THERMAL_ATTRS(12) || attr == THERMAL_ATTRS(13) ||
6444 	    attr == THERMAL_ATTRS(14) || attr == THERMAL_ATTRS(15)) {
6445 		if (thermal_read_mode != TPACPI_THERMAL_TPEC_16)
6446 			return 0;
6447 	}
6448 
6449 	return attr->mode;
6450 }
6451 
6452 static const struct attribute_group thermal_attr_group = {
6453 	.is_visible = thermal_attr_is_visible,
6454 	.attrs = thermal_temp_input_attr,
6455 };
6456 
6457 #undef THERMAL_SENSOR_ATTR_TEMP
6458 #undef THERMAL_ATTRS
6459 
6460 static ssize_t temp1_label_show(struct device *dev, struct device_attribute *attr, char *buf)
6461 {
6462 	return sysfs_emit(buf, "CPU\n");
6463 }
6464 static DEVICE_ATTR_RO(temp1_label);
6465 
6466 static ssize_t temp2_label_show(struct device *dev, struct device_attribute *attr, char *buf)
6467 {
6468 	return sysfs_emit(buf, "GPU\n");
6469 }
6470 static DEVICE_ATTR_RO(temp2_label);
6471 
6472 static struct attribute *temp_label_attributes[] = {
6473 	&dev_attr_temp1_label.attr,
6474 	&dev_attr_temp2_label.attr,
6475 	NULL
6476 };
6477 
6478 static umode_t temp_label_attr_is_visible(struct kobject *kobj,
6479 					  struct attribute *attr, int n)
6480 {
6481 	return thermal_use_labels ? attr->mode : 0;
6482 }
6483 
6484 static const struct attribute_group temp_label_attr_group = {
6485 	.is_visible = temp_label_attr_is_visible,
6486 	.attrs = temp_label_attributes,
6487 };
6488 
6489 /* --------------------------------------------------------------------- */
6490 
6491 static int __init thermal_init(struct ibm_init_struct *iibm)
6492 {
6493 	u8 t, ta1, ta2, ver = 0;
6494 	int i;
6495 	int acpi_tmp7;
6496 
6497 	vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
6498 
6499 	acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
6500 
6501 	if (thinkpad_id.ec_model) {
6502 		/*
6503 		 * Direct EC access mode: sensors at registers
6504 		 * 0x78-0x7F, 0xC0-0xC7.  Registers return 0x00 for
6505 		 * non-implemented, thermal sensors return 0x80 when
6506 		 * not available
6507 		 * The above rule is unfortunately flawed. This has been seen with
6508 		 * 0xC2 (power supply ID) causing thermal control problems.
6509 		 * The EC version can be determined by offset 0xEF and at least for
6510 		 * version 3 the Lenovo firmware team confirmed that registers 0xC0-0xC7
6511 		 * are not thermal registers.
6512 		 */
6513 		if (!acpi_ec_read(TP_EC_FUNCREV, &ver))
6514 			pr_warn("Thinkpad ACPI EC unable to access EC version\n");
6515 
6516 		ta1 = ta2 = 0;
6517 		for (i = 0; i < 8; i++) {
6518 			if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
6519 				ta1 |= t;
6520 			} else {
6521 				ta1 = 0;
6522 				break;
6523 			}
6524 			if (ver < 3) {
6525 				if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
6526 					ta2 |= t;
6527 				} else {
6528 					ta1 = 0;
6529 					break;
6530 				}
6531 			}
6532 		}
6533 		if (ta1 == 0) {
6534 			/* This is sheer paranoia, but we handle it anyway */
6535 			if (acpi_tmp7) {
6536 				pr_err("ThinkPad ACPI EC access misbehaving, falling back to ACPI TMPx access mode\n");
6537 				thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
6538 			} else {
6539 				pr_err("ThinkPad ACPI EC access misbehaving, disabling thermal sensors access\n");
6540 				thermal_read_mode = TPACPI_THERMAL_NONE;
6541 			}
6542 		} else {
6543 			if (ver >= 3) {
6544 				thermal_read_mode = TPACPI_THERMAL_TPEC_8;
6545 				thermal_use_labels = true;
6546 			} else {
6547 				thermal_read_mode =
6548 					(ta2 != 0) ?
6549 					TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
6550 			}
6551 		}
6552 	} else if (acpi_tmp7) {
6553 		if (tpacpi_is_ibm() &&
6554 		    acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
6555 			/* 600e/x, 770e, 770x */
6556 			thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
6557 		} else {
6558 			/* IBM/LENOVO DSDT EC.TMPx access, max 8 sensors */
6559 			thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
6560 		}
6561 	} else {
6562 		/* temperatures not supported on 570, G4x, R30, R31, R32 */
6563 		thermal_read_mode = TPACPI_THERMAL_NONE;
6564 	}
6565 
6566 	vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
6567 		str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
6568 		thermal_read_mode);
6569 
6570 	return thermal_read_mode != TPACPI_THERMAL_NONE ? 0 : -ENODEV;
6571 }
6572 
6573 static int thermal_read(struct seq_file *m)
6574 {
6575 	int n, i;
6576 	struct ibm_thermal_sensors_struct t;
6577 
6578 	n = thermal_get_sensors(&t);
6579 	if (unlikely(n < 0))
6580 		return n;
6581 
6582 	seq_printf(m, "temperatures:\t");
6583 
6584 	if (n > 0) {
6585 		for (i = 0; i < (n - 1); i++)
6586 			seq_printf(m, "%d ", t.temp[i] / 1000);
6587 		seq_printf(m, "%d\n", t.temp[i] / 1000);
6588 	} else
6589 		seq_printf(m, "not supported\n");
6590 
6591 	return 0;
6592 }
6593 
6594 static struct ibm_struct thermal_driver_data = {
6595 	.name = "thermal",
6596 	.read = thermal_read,
6597 };
6598 
6599 /*************************************************************************
6600  * Backlight/brightness subdriver
6601  */
6602 
6603 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
6604 
6605 /*
6606  * ThinkPads can read brightness from two places: EC HBRV (0x31), or
6607  * CMOS NVRAM byte 0x5E, bits 0-3.
6608  *
6609  * EC HBRV (0x31) has the following layout
6610  *   Bit 7: unknown function
6611  *   Bit 6: unknown function
6612  *   Bit 5: Z: honour scale changes, NZ: ignore scale changes
6613  *   Bit 4: must be set to zero to avoid problems
6614  *   Bit 3-0: backlight brightness level
6615  *
6616  * brightness_get_raw returns status data in the HBRV layout
6617  *
6618  * WARNING: The X61 has been verified to use HBRV for something else, so
6619  * this should be used _only_ on IBM ThinkPads, and maybe with some careful
6620  * testing on the very early *60 Lenovo models...
6621  */
6622 
6623 enum {
6624 	TP_EC_BACKLIGHT = 0x31,
6625 
6626 	/* TP_EC_BACKLIGHT bitmasks */
6627 	TP_EC_BACKLIGHT_LVLMSK = 0x1F,
6628 	TP_EC_BACKLIGHT_CMDMSK = 0xE0,
6629 	TP_EC_BACKLIGHT_MAPSW = 0x20,
6630 };
6631 
6632 enum tpacpi_brightness_access_mode {
6633 	TPACPI_BRGHT_MODE_AUTO = 0,	/* Not implemented yet */
6634 	TPACPI_BRGHT_MODE_EC,		/* EC control */
6635 	TPACPI_BRGHT_MODE_UCMS_STEP,	/* UCMS step-based control */
6636 	TPACPI_BRGHT_MODE_ECNVRAM,	/* EC control w/ NVRAM store */
6637 	TPACPI_BRGHT_MODE_MAX
6638 };
6639 
6640 static struct backlight_device *ibm_backlight_device;
6641 
6642 static enum tpacpi_brightness_access_mode brightness_mode =
6643 		TPACPI_BRGHT_MODE_MAX;
6644 
6645 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
6646 
6647 static struct mutex brightness_mutex;
6648 
6649 /* NVRAM brightness access,
6650  * call with brightness_mutex held! */
6651 static unsigned int tpacpi_brightness_nvram_get(void)
6652 {
6653 	u8 lnvram;
6654 
6655 	lnvram = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
6656 		  & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
6657 		  >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
6658 	lnvram &= bright_maxlvl;
6659 
6660 	return lnvram;
6661 }
6662 
6663 static void tpacpi_brightness_checkpoint_nvram(void)
6664 {
6665 	u8 lec = 0;
6666 	u8 b_nvram;
6667 
6668 	if (brightness_mode != TPACPI_BRGHT_MODE_ECNVRAM)
6669 		return;
6670 
6671 	vdbg_printk(TPACPI_DBG_BRGHT,
6672 		"trying to checkpoint backlight level to NVRAM...\n");
6673 
6674 	if (mutex_lock_killable(&brightness_mutex) < 0)
6675 		return;
6676 
6677 	if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
6678 		goto unlock;
6679 	lec &= TP_EC_BACKLIGHT_LVLMSK;
6680 	b_nvram = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
6681 
6682 	if (lec != ((b_nvram & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
6683 			     >> TP_NVRAM_POS_LEVEL_BRIGHTNESS)) {
6684 		/* NVRAM needs update */
6685 		b_nvram &= ~(TP_NVRAM_MASK_LEVEL_BRIGHTNESS <<
6686 				TP_NVRAM_POS_LEVEL_BRIGHTNESS);
6687 		b_nvram |= lec;
6688 		nvram_write_byte(b_nvram, TP_NVRAM_ADDR_BRIGHTNESS);
6689 		dbg_printk(TPACPI_DBG_BRGHT,
6690 			   "updated NVRAM backlight level to %u (0x%02x)\n",
6691 			   (unsigned int) lec, (unsigned int) b_nvram);
6692 	} else
6693 		vdbg_printk(TPACPI_DBG_BRGHT,
6694 			   "NVRAM backlight level already is %u (0x%02x)\n",
6695 			   (unsigned int) lec, (unsigned int) b_nvram);
6696 
6697 unlock:
6698 	mutex_unlock(&brightness_mutex);
6699 }
6700 
6701 
6702 /* call with brightness_mutex held! */
6703 static int tpacpi_brightness_get_raw(int *status)
6704 {
6705 	u8 lec = 0;
6706 
6707 	switch (brightness_mode) {
6708 	case TPACPI_BRGHT_MODE_UCMS_STEP:
6709 		*status = tpacpi_brightness_nvram_get();
6710 		return 0;
6711 	case TPACPI_BRGHT_MODE_EC:
6712 	case TPACPI_BRGHT_MODE_ECNVRAM:
6713 		if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
6714 			return -EIO;
6715 		*status = lec;
6716 		return 0;
6717 	default:
6718 		return -ENXIO;
6719 	}
6720 }
6721 
6722 /* call with brightness_mutex held! */
6723 /* do NOT call with illegal backlight level value */
6724 static int tpacpi_brightness_set_ec(unsigned int value)
6725 {
6726 	u8 lec = 0;
6727 
6728 	if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
6729 		return -EIO;
6730 
6731 	if (unlikely(!acpi_ec_write(TP_EC_BACKLIGHT,
6732 				(lec & TP_EC_BACKLIGHT_CMDMSK) |
6733 				(value & TP_EC_BACKLIGHT_LVLMSK))))
6734 		return -EIO;
6735 
6736 	return 0;
6737 }
6738 
6739 /* call with brightness_mutex held! */
6740 static int tpacpi_brightness_set_ucmsstep(unsigned int value)
6741 {
6742 	int cmos_cmd, inc;
6743 	unsigned int current_value, i;
6744 
6745 	current_value = tpacpi_brightness_nvram_get();
6746 
6747 	if (value == current_value)
6748 		return 0;
6749 
6750 	cmos_cmd = (value > current_value) ?
6751 			TP_CMOS_BRIGHTNESS_UP :
6752 			TP_CMOS_BRIGHTNESS_DOWN;
6753 	inc = (value > current_value) ? 1 : -1;
6754 
6755 	for (i = current_value; i != value; i += inc)
6756 		if (issue_thinkpad_cmos_command(cmos_cmd))
6757 			return -EIO;
6758 
6759 	return 0;
6760 }
6761 
6762 /* May return EINTR which can always be mapped to ERESTARTSYS */
6763 static int brightness_set(unsigned int value)
6764 {
6765 	int res;
6766 
6767 	if (value > bright_maxlvl)
6768 		return -EINVAL;
6769 
6770 	vdbg_printk(TPACPI_DBG_BRGHT,
6771 			"set backlight level to %d\n", value);
6772 
6773 	res = mutex_lock_killable(&brightness_mutex);
6774 	if (res < 0)
6775 		return res;
6776 
6777 	switch (brightness_mode) {
6778 	case TPACPI_BRGHT_MODE_EC:
6779 	case TPACPI_BRGHT_MODE_ECNVRAM:
6780 		res = tpacpi_brightness_set_ec(value);
6781 		break;
6782 	case TPACPI_BRGHT_MODE_UCMS_STEP:
6783 		res = tpacpi_brightness_set_ucmsstep(value);
6784 		break;
6785 	default:
6786 		res = -ENXIO;
6787 	}
6788 
6789 	mutex_unlock(&brightness_mutex);
6790 	return res;
6791 }
6792 
6793 /* sysfs backlight class ----------------------------------------------- */
6794 
6795 static int brightness_update_status(struct backlight_device *bd)
6796 {
6797 	int level = backlight_get_brightness(bd);
6798 
6799 	dbg_printk(TPACPI_DBG_BRGHT,
6800 			"backlight: attempt to set level to %d\n",
6801 			level);
6802 
6803 	/* it is the backlight class's job (caller) to handle
6804 	 * EINTR and other errors properly */
6805 	return brightness_set(level);
6806 }
6807 
6808 static int brightness_get(struct backlight_device *bd)
6809 {
6810 	int status, res;
6811 
6812 	res = mutex_lock_killable(&brightness_mutex);
6813 	if (res < 0)
6814 		return 0;
6815 
6816 	res = tpacpi_brightness_get_raw(&status);
6817 
6818 	mutex_unlock(&brightness_mutex);
6819 
6820 	if (res < 0)
6821 		return 0;
6822 
6823 	return status & TP_EC_BACKLIGHT_LVLMSK;
6824 }
6825 
6826 static void tpacpi_brightness_notify_change(void)
6827 {
6828 	backlight_force_update(ibm_backlight_device,
6829 			       BACKLIGHT_UPDATE_HOTKEY);
6830 }
6831 
6832 static const struct backlight_ops ibm_backlight_data = {
6833 	.get_brightness = brightness_get,
6834 	.update_status  = brightness_update_status,
6835 };
6836 
6837 /* --------------------------------------------------------------------- */
6838 
6839 static int __init tpacpi_evaluate_bcl(struct acpi_device *adev, void *not_used)
6840 {
6841 	struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
6842 	union acpi_object *obj;
6843 	acpi_status status;
6844 	int rc;
6845 
6846 	status = acpi_evaluate_object(adev->handle, "_BCL", NULL, &buffer);
6847 	if (ACPI_FAILURE(status))
6848 		return 0;
6849 
6850 	obj = buffer.pointer;
6851 	if (!obj || obj->type != ACPI_TYPE_PACKAGE) {
6852 		acpi_handle_info(adev->handle,
6853 				 "Unknown _BCL data, please report this to %s\n",
6854 				 TPACPI_MAIL);
6855 		rc = 0;
6856 	} else {
6857 		rc = obj->package.count;
6858 	}
6859 	kfree(obj);
6860 
6861 	return rc;
6862 }
6863 
6864 /*
6865  * Call _BCL method of video device.  On some ThinkPads this will
6866  * switch the firmware to the ACPI brightness control mode.
6867  */
6868 
6869 static int __init tpacpi_query_bcl_levels(acpi_handle handle)
6870 {
6871 	struct acpi_device *device;
6872 
6873 	device = acpi_fetch_acpi_dev(handle);
6874 	if (!device)
6875 		return 0;
6876 
6877 	return acpi_dev_for_each_child(device, tpacpi_evaluate_bcl, NULL);
6878 }
6879 
6880 
6881 /*
6882  * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map
6883  */
6884 static unsigned int __init tpacpi_check_std_acpi_brightness_support(void)
6885 {
6886 	acpi_handle video_device;
6887 	int bcl_levels = 0;
6888 
6889 	tpacpi_acpi_handle_locate("video", NULL, &video_device);
6890 	if (video_device)
6891 		bcl_levels = tpacpi_query_bcl_levels(video_device);
6892 
6893 	tp_features.bright_acpimode = (bcl_levels > 0);
6894 
6895 	return (bcl_levels > 2) ? (bcl_levels - 2) : 0;
6896 }
6897 
6898 /*
6899  * These are only useful for models that have only one possibility
6900  * of GPU.  If the BIOS model handles both ATI and Intel, don't use
6901  * these quirks.
6902  */
6903 #define TPACPI_BRGHT_Q_NOEC	0x0001	/* Must NOT use EC HBRV */
6904 #define TPACPI_BRGHT_Q_EC	0x0002  /* Should or must use EC HBRV */
6905 #define TPACPI_BRGHT_Q_ASK	0x8000	/* Ask for user report */
6906 
6907 static const struct tpacpi_quirk brightness_quirk_table[] __initconst = {
6908 	/* Models with ATI GPUs known to require ECNVRAM mode */
6909 	TPACPI_Q_IBM('1', 'Y', TPACPI_BRGHT_Q_EC),	/* T43/p ATI */
6910 
6911 	/* Models with ATI GPUs that can use ECNVRAM */
6912 	TPACPI_Q_IBM('1', 'R', TPACPI_BRGHT_Q_EC),	/* R50,51 T40-42 */
6913 	TPACPI_Q_IBM('1', 'Q', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6914 	TPACPI_Q_IBM('7', '6', TPACPI_BRGHT_Q_EC),	/* R52 */
6915 	TPACPI_Q_IBM('7', '8', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6916 
6917 	/* Models with Intel Extreme Graphics 2 */
6918 	TPACPI_Q_IBM('1', 'U', TPACPI_BRGHT_Q_NOEC),	/* X40 */
6919 	TPACPI_Q_IBM('1', 'V', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6920 	TPACPI_Q_IBM('1', 'W', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
6921 
6922 	/* Models with Intel GMA900 */
6923 	TPACPI_Q_IBM('7', '0', TPACPI_BRGHT_Q_NOEC),	/* T43, R52 */
6924 	TPACPI_Q_IBM('7', '4', TPACPI_BRGHT_Q_NOEC),	/* X41 */
6925 	TPACPI_Q_IBM('7', '5', TPACPI_BRGHT_Q_NOEC),	/* X41 Tablet */
6926 };
6927 
6928 /*
6929  * Returns < 0 for error, otherwise sets tp_features.bright_*
6930  * and bright_maxlvl.
6931  */
6932 static void __init tpacpi_detect_brightness_capabilities(void)
6933 {
6934 	unsigned int b;
6935 
6936 	vdbg_printk(TPACPI_DBG_INIT,
6937 		    "detecting firmware brightness interface capabilities\n");
6938 
6939 	/* we could run a quirks check here (same table used by
6940 	 * brightness_init) if needed */
6941 
6942 	/*
6943 	 * We always attempt to detect acpi support, so as to switch
6944 	 * Lenovo Vista BIOS to ACPI brightness mode even if we are not
6945 	 * going to publish a backlight interface
6946 	 */
6947 	b = tpacpi_check_std_acpi_brightness_support();
6948 	switch (b) {
6949 	case 16:
6950 		bright_maxlvl = 15;
6951 		break;
6952 	case 8:
6953 	case 0:
6954 		bright_maxlvl = 7;
6955 		break;
6956 	default:
6957 		tp_features.bright_unkfw = 1;
6958 		bright_maxlvl = b - 1;
6959 	}
6960 	pr_debug("detected %u brightness levels\n", bright_maxlvl + 1);
6961 }
6962 
6963 static int __init brightness_init(struct ibm_init_struct *iibm)
6964 {
6965 	struct backlight_properties props;
6966 	int b;
6967 	unsigned long quirks;
6968 
6969 	vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
6970 
6971 	mutex_init(&brightness_mutex);
6972 
6973 	quirks = tpacpi_check_quirks(brightness_quirk_table,
6974 				ARRAY_SIZE(brightness_quirk_table));
6975 
6976 	/* tpacpi_detect_brightness_capabilities() must have run already */
6977 
6978 	/* if it is unknown, we don't handle it: it wouldn't be safe */
6979 	if (tp_features.bright_unkfw)
6980 		return -ENODEV;
6981 
6982 	if (!brightness_enable) {
6983 		dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
6984 			   "brightness support disabled by module parameter\n");
6985 		return -ENODEV;
6986 	}
6987 
6988 	if (acpi_video_get_backlight_type() != acpi_backlight_vendor) {
6989 		if (brightness_enable > 1) {
6990 			pr_info("Standard ACPI backlight interface available, not loading native one\n");
6991 			return -ENODEV;
6992 		} else if (brightness_enable == 1) {
6993 			pr_warn("Cannot enable backlight brightness support, ACPI is already handling it.  Refer to the acpi_backlight kernel parameter.\n");
6994 			return -ENODEV;
6995 		}
6996 	} else if (!tp_features.bright_acpimode) {
6997 		pr_notice("ACPI backlight interface not available\n");
6998 		return -ENODEV;
6999 	}
7000 
7001 	pr_notice("ACPI native brightness control enabled\n");
7002 
7003 	/*
7004 	 * Check for module parameter bogosity, note that we
7005 	 * init brightness_mode to TPACPI_BRGHT_MODE_MAX in order to be
7006 	 * able to detect "unspecified"
7007 	 */
7008 	if (brightness_mode > TPACPI_BRGHT_MODE_MAX)
7009 		return -EINVAL;
7010 
7011 	/* TPACPI_BRGHT_MODE_AUTO not implemented yet, just use default */
7012 	if (brightness_mode == TPACPI_BRGHT_MODE_AUTO ||
7013 	    brightness_mode == TPACPI_BRGHT_MODE_MAX) {
7014 		if (quirks & TPACPI_BRGHT_Q_EC)
7015 			brightness_mode = TPACPI_BRGHT_MODE_ECNVRAM;
7016 		else
7017 			brightness_mode = TPACPI_BRGHT_MODE_UCMS_STEP;
7018 
7019 		dbg_printk(TPACPI_DBG_BRGHT,
7020 			   "driver auto-selected brightness_mode=%d\n",
7021 			   brightness_mode);
7022 	}
7023 
7024 	/* Safety */
7025 	if (!tpacpi_is_ibm() &&
7026 	    (brightness_mode == TPACPI_BRGHT_MODE_ECNVRAM ||
7027 	     brightness_mode == TPACPI_BRGHT_MODE_EC))
7028 		return -EINVAL;
7029 
7030 	if (tpacpi_brightness_get_raw(&b) < 0)
7031 		return -ENODEV;
7032 
7033 	memset(&props, 0, sizeof(struct backlight_properties));
7034 	props.type = BACKLIGHT_PLATFORM;
7035 	props.max_brightness = bright_maxlvl;
7036 	props.brightness = b & TP_EC_BACKLIGHT_LVLMSK;
7037 	ibm_backlight_device = backlight_device_register(TPACPI_BACKLIGHT_DEV_NAME,
7038 							 NULL, NULL,
7039 							 &ibm_backlight_data,
7040 							 &props);
7041 	if (IS_ERR(ibm_backlight_device)) {
7042 		int rc = PTR_ERR(ibm_backlight_device);
7043 		ibm_backlight_device = NULL;
7044 		pr_err("Could not register backlight device\n");
7045 		return rc;
7046 	}
7047 	vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
7048 			"brightness is supported\n");
7049 
7050 	if (quirks & TPACPI_BRGHT_Q_ASK) {
7051 		pr_notice("brightness: will use unverified default: brightness_mode=%d\n",
7052 			  brightness_mode);
7053 		pr_notice("brightness: please report to %s whether it works well or not on your ThinkPad\n",
7054 			  TPACPI_MAIL);
7055 	}
7056 
7057 	/* Added by mistake in early 2007.  Probably useless, but it could
7058 	 * be working around some unknown firmware problem where the value
7059 	 * read at startup doesn't match the real hardware state... so leave
7060 	 * it in place just in case */
7061 	backlight_update_status(ibm_backlight_device);
7062 
7063 	vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
7064 		    "brightness: registering brightness hotkeys as change notification\n");
7065 	tpacpi_hotkey_driver_mask_set(hotkey_driver_mask
7066 				| TP_ACPI_HKEY_BRGHTUP_MASK
7067 				| TP_ACPI_HKEY_BRGHTDWN_MASK);
7068 	return 0;
7069 }
7070 
7071 static void brightness_suspend(void)
7072 {
7073 	tpacpi_brightness_checkpoint_nvram();
7074 }
7075 
7076 static void brightness_shutdown(void)
7077 {
7078 	tpacpi_brightness_checkpoint_nvram();
7079 }
7080 
7081 static void brightness_exit(void)
7082 {
7083 	if (ibm_backlight_device) {
7084 		vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_BRGHT,
7085 			    "calling backlight_device_unregister()\n");
7086 		backlight_device_unregister(ibm_backlight_device);
7087 	}
7088 
7089 	tpacpi_brightness_checkpoint_nvram();
7090 }
7091 
7092 static int brightness_read(struct seq_file *m)
7093 {
7094 	int level;
7095 
7096 	level = brightness_get(NULL);
7097 	if (level < 0) {
7098 		seq_printf(m, "level:\t\tunreadable\n");
7099 	} else {
7100 		seq_printf(m, "level:\t\t%d\n", level);
7101 		seq_printf(m, "commands:\tup, down\n");
7102 		seq_printf(m, "commands:\tlevel <level> (<level> is 0-%d)\n",
7103 			       bright_maxlvl);
7104 	}
7105 
7106 	return 0;
7107 }
7108 
7109 static int brightness_write(char *buf)
7110 {
7111 	int level;
7112 	int rc;
7113 	char *cmd;
7114 
7115 	level = brightness_get(NULL);
7116 	if (level < 0)
7117 		return level;
7118 
7119 	while ((cmd = strsep(&buf, ","))) {
7120 		if (strlencmp(cmd, "up") == 0) {
7121 			if (level < bright_maxlvl)
7122 				level++;
7123 		} else if (strlencmp(cmd, "down") == 0) {
7124 			if (level > 0)
7125 				level--;
7126 		} else if (sscanf(cmd, "level %d", &level) == 1 &&
7127 			   level >= 0 && level <= bright_maxlvl) {
7128 			/* new level set */
7129 		} else
7130 			return -EINVAL;
7131 	}
7132 
7133 	tpacpi_disclose_usertask("procfs brightness",
7134 			"set level to %d\n", level);
7135 
7136 	/*
7137 	 * Now we know what the final level should be, so we try to set it.
7138 	 * Doing it this way makes the syscall restartable in case of EINTR
7139 	 */
7140 	rc = brightness_set(level);
7141 	if (!rc && ibm_backlight_device)
7142 		backlight_force_update(ibm_backlight_device,
7143 					BACKLIGHT_UPDATE_SYSFS);
7144 	return (rc == -EINTR) ? -ERESTARTSYS : rc;
7145 }
7146 
7147 static struct ibm_struct brightness_driver_data = {
7148 	.name = "brightness",
7149 	.read = brightness_read,
7150 	.write = brightness_write,
7151 	.exit = brightness_exit,
7152 	.suspend = brightness_suspend,
7153 	.shutdown = brightness_shutdown,
7154 };
7155 
7156 /*************************************************************************
7157  * Volume subdriver
7158  */
7159 
7160 /*
7161  * IBM ThinkPads have a simple volume controller with MUTE gating.
7162  * Very early Lenovo ThinkPads follow the IBM ThinkPad spec.
7163  *
7164  * Since the *61 series (and probably also the later *60 series), Lenovo
7165  * ThinkPads only implement the MUTE gate.
7166  *
7167  * EC register 0x30
7168  *   Bit 6: MUTE (1 mutes sound)
7169  *   Bit 3-0: Volume
7170  *   Other bits should be zero as far as we know.
7171  *
7172  * This is also stored in CMOS NVRAM, byte 0x60, bit 6 (MUTE), and
7173  * bits 3-0 (volume).  Other bits in NVRAM may have other functions,
7174  * such as bit 7 which is used to detect repeated presses of MUTE,
7175  * and we leave them unchanged.
7176  *
7177  * On newer Lenovo ThinkPads, the EC can automatically change the volume
7178  * in response to user input.  Unfortunately, this rarely works well.
7179  * The laptop changes the state of its internal MUTE gate and, on some
7180  * models, sends KEY_MUTE, causing any user code that responds to the
7181  * mute button to get confused.  The hardware MUTE gate is also
7182  * unnecessary, since user code can handle the mute button without
7183  * kernel or EC help.
7184  *
7185  * To avoid confusing userspace, we simply disable all EC-based mute
7186  * and volume controls when possible.
7187  */
7188 
7189 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT
7190 
7191 #define TPACPI_ALSA_DRVNAME  "ThinkPad EC"
7192 #define TPACPI_ALSA_SHRTNAME "ThinkPad Console Audio Control"
7193 #define TPACPI_ALSA_MIXERNAME TPACPI_ALSA_SHRTNAME
7194 
7195 #if SNDRV_CARDS <= 32
7196 #define DEFAULT_ALSA_IDX		~((1 << (SNDRV_CARDS - 3)) - 1)
7197 #else
7198 #define DEFAULT_ALSA_IDX		~((1 << (32 - 3)) - 1)
7199 #endif
7200 static int alsa_index = DEFAULT_ALSA_IDX; /* last three slots */
7201 static char *alsa_id = "ThinkPadEC";
7202 static bool alsa_enable = SNDRV_DEFAULT_ENABLE1;
7203 
7204 struct tpacpi_alsa_data {
7205 	struct snd_card *card;
7206 	struct snd_ctl_elem_id *ctl_mute_id;
7207 	struct snd_ctl_elem_id *ctl_vol_id;
7208 };
7209 
7210 static struct snd_card *alsa_card;
7211 
7212 enum {
7213 	TP_EC_AUDIO = 0x30,
7214 
7215 	/* TP_EC_AUDIO bits */
7216 	TP_EC_AUDIO_MUTESW = 6,
7217 
7218 	/* TP_EC_AUDIO bitmasks */
7219 	TP_EC_AUDIO_LVL_MSK = 0x0F,
7220 	TP_EC_AUDIO_MUTESW_MSK = (1 << TP_EC_AUDIO_MUTESW),
7221 
7222 	/* Maximum volume */
7223 	TP_EC_VOLUME_MAX = 14,
7224 };
7225 
7226 enum tpacpi_volume_access_mode {
7227 	TPACPI_VOL_MODE_AUTO = 0,	/* Not implemented yet */
7228 	TPACPI_VOL_MODE_EC,		/* Pure EC control */
7229 	TPACPI_VOL_MODE_UCMS_STEP,	/* UCMS step-based control: N/A */
7230 	TPACPI_VOL_MODE_ECNVRAM,	/* EC control w/ NVRAM store */
7231 	TPACPI_VOL_MODE_MAX
7232 };
7233 
7234 enum tpacpi_volume_capabilities {
7235 	TPACPI_VOL_CAP_AUTO = 0,	/* Use white/blacklist */
7236 	TPACPI_VOL_CAP_VOLMUTE,		/* Output vol and mute */
7237 	TPACPI_VOL_CAP_MUTEONLY,	/* Output mute only */
7238 	TPACPI_VOL_CAP_MAX
7239 };
7240 
7241 enum tpacpi_mute_btn_mode {
7242 	TP_EC_MUTE_BTN_LATCH  = 0,	/* Mute mutes; up/down unmutes */
7243 	/* We don't know what mode 1 is. */
7244 	TP_EC_MUTE_BTN_NONE   = 2,	/* Mute and up/down are just keys */
7245 	TP_EC_MUTE_BTN_TOGGLE = 3,	/* Mute toggles; up/down unmutes */
7246 };
7247 
7248 static enum tpacpi_volume_access_mode volume_mode =
7249 	TPACPI_VOL_MODE_MAX;
7250 
7251 static enum tpacpi_volume_capabilities volume_capabilities;
7252 static bool volume_control_allowed;
7253 static bool software_mute_requested = true;
7254 static bool software_mute_active;
7255 static int software_mute_orig_mode;
7256 
7257 /*
7258  * Used to syncronize writers to TP_EC_AUDIO and
7259  * TP_NVRAM_ADDR_MIXER, as we need to do read-modify-write
7260  */
7261 static struct mutex volume_mutex;
7262 
7263 static void tpacpi_volume_checkpoint_nvram(void)
7264 {
7265 	u8 lec = 0;
7266 	u8 b_nvram;
7267 	u8 ec_mask;
7268 
7269 	if (volume_mode != TPACPI_VOL_MODE_ECNVRAM)
7270 		return;
7271 	if (!volume_control_allowed)
7272 		return;
7273 	if (software_mute_active)
7274 		return;
7275 
7276 	vdbg_printk(TPACPI_DBG_MIXER,
7277 		"trying to checkpoint mixer state to NVRAM...\n");
7278 
7279 	if (tp_features.mixer_no_level_control)
7280 		ec_mask = TP_EC_AUDIO_MUTESW_MSK;
7281 	else
7282 		ec_mask = TP_EC_AUDIO_MUTESW_MSK | TP_EC_AUDIO_LVL_MSK;
7283 
7284 	if (mutex_lock_killable(&volume_mutex) < 0)
7285 		return;
7286 
7287 	if (unlikely(!acpi_ec_read(TP_EC_AUDIO, &lec)))
7288 		goto unlock;
7289 	lec &= ec_mask;
7290 	b_nvram = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
7291 
7292 	if (lec != (b_nvram & ec_mask)) {
7293 		/* NVRAM needs update */
7294 		b_nvram &= ~ec_mask;
7295 		b_nvram |= lec;
7296 		nvram_write_byte(b_nvram, TP_NVRAM_ADDR_MIXER);
7297 		dbg_printk(TPACPI_DBG_MIXER,
7298 			   "updated NVRAM mixer status to 0x%02x (0x%02x)\n",
7299 			   (unsigned int) lec, (unsigned int) b_nvram);
7300 	} else {
7301 		vdbg_printk(TPACPI_DBG_MIXER,
7302 			   "NVRAM mixer status already is 0x%02x (0x%02x)\n",
7303 			   (unsigned int) lec, (unsigned int) b_nvram);
7304 	}
7305 
7306 unlock:
7307 	mutex_unlock(&volume_mutex);
7308 }
7309 
7310 static int volume_get_status_ec(u8 *status)
7311 {
7312 	u8 s;
7313 
7314 	if (!acpi_ec_read(TP_EC_AUDIO, &s))
7315 		return -EIO;
7316 
7317 	*status = s;
7318 
7319 	dbg_printk(TPACPI_DBG_MIXER, "status 0x%02x\n", s);
7320 
7321 	return 0;
7322 }
7323 
7324 static int volume_get_status(u8 *status)
7325 {
7326 	return volume_get_status_ec(status);
7327 }
7328 
7329 static int volume_set_status_ec(const u8 status)
7330 {
7331 	if (!acpi_ec_write(TP_EC_AUDIO, status))
7332 		return -EIO;
7333 
7334 	dbg_printk(TPACPI_DBG_MIXER, "set EC mixer to 0x%02x\n", status);
7335 
7336 	/*
7337 	 * On X200s, and possibly on others, it can take a while for
7338 	 * reads to become correct.
7339 	 */
7340 	msleep(1);
7341 
7342 	return 0;
7343 }
7344 
7345 static int volume_set_status(const u8 status)
7346 {
7347 	return volume_set_status_ec(status);
7348 }
7349 
7350 /* returns < 0 on error, 0 on no change, 1 on change */
7351 static int __volume_set_mute_ec(const bool mute)
7352 {
7353 	int rc;
7354 	u8 s, n;
7355 
7356 	if (mutex_lock_killable(&volume_mutex) < 0)
7357 		return -EINTR;
7358 
7359 	rc = volume_get_status_ec(&s);
7360 	if (rc)
7361 		goto unlock;
7362 
7363 	n = (mute) ? s | TP_EC_AUDIO_MUTESW_MSK :
7364 		     s & ~TP_EC_AUDIO_MUTESW_MSK;
7365 
7366 	if (n != s) {
7367 		rc = volume_set_status_ec(n);
7368 		if (!rc)
7369 			rc = 1;
7370 	}
7371 
7372 unlock:
7373 	mutex_unlock(&volume_mutex);
7374 	return rc;
7375 }
7376 
7377 static int volume_alsa_set_mute(const bool mute)
7378 {
7379 	dbg_printk(TPACPI_DBG_MIXER, "ALSA: trying to %smute\n",
7380 		   (mute) ? "" : "un");
7381 	return __volume_set_mute_ec(mute);
7382 }
7383 
7384 static int volume_set_mute(const bool mute)
7385 {
7386 	int rc;
7387 
7388 	dbg_printk(TPACPI_DBG_MIXER, "trying to %smute\n",
7389 		   (mute) ? "" : "un");
7390 
7391 	rc = __volume_set_mute_ec(mute);
7392 	return (rc < 0) ? rc : 0;
7393 }
7394 
7395 /* returns < 0 on error, 0 on no change, 1 on change */
7396 static int __volume_set_volume_ec(const u8 vol)
7397 {
7398 	int rc;
7399 	u8 s, n;
7400 
7401 	if (vol > TP_EC_VOLUME_MAX)
7402 		return -EINVAL;
7403 
7404 	if (mutex_lock_killable(&volume_mutex) < 0)
7405 		return -EINTR;
7406 
7407 	rc = volume_get_status_ec(&s);
7408 	if (rc)
7409 		goto unlock;
7410 
7411 	n = (s & ~TP_EC_AUDIO_LVL_MSK) | vol;
7412 
7413 	if (n != s) {
7414 		rc = volume_set_status_ec(n);
7415 		if (!rc)
7416 			rc = 1;
7417 	}
7418 
7419 unlock:
7420 	mutex_unlock(&volume_mutex);
7421 	return rc;
7422 }
7423 
7424 static int volume_set_software_mute(bool startup)
7425 {
7426 	int result;
7427 
7428 	if (!tpacpi_is_lenovo())
7429 		return -ENODEV;
7430 
7431 	if (startup) {
7432 		if (!acpi_evalf(ec_handle, &software_mute_orig_mode,
7433 				"HAUM", "qd"))
7434 			return -EIO;
7435 
7436 		dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
7437 			    "Initial HAUM setting was %d\n",
7438 			    software_mute_orig_mode);
7439 	}
7440 
7441 	if (!acpi_evalf(ec_handle, &result, "SAUM", "qdd",
7442 			(int)TP_EC_MUTE_BTN_NONE))
7443 		return -EIO;
7444 
7445 	if (result != TP_EC_MUTE_BTN_NONE)
7446 		pr_warn("Unexpected SAUM result %d\n",
7447 			result);
7448 
7449 	/*
7450 	 * In software mute mode, the standard codec controls take
7451 	 * precendence, so we unmute the ThinkPad HW switch at
7452 	 * startup.  Just on case there are SAUM-capable ThinkPads
7453 	 * with level controls, set max HW volume as well.
7454 	 */
7455 	if (tp_features.mixer_no_level_control)
7456 		result = volume_set_mute(false);
7457 	else
7458 		result = volume_set_status(TP_EC_VOLUME_MAX);
7459 
7460 	if (result != 0)
7461 		pr_warn("Failed to unmute the HW mute switch\n");
7462 
7463 	return 0;
7464 }
7465 
7466 static void volume_exit_software_mute(void)
7467 {
7468 	int r;
7469 
7470 	if (!acpi_evalf(ec_handle, &r, "SAUM", "qdd", software_mute_orig_mode)
7471 	    || r != software_mute_orig_mode)
7472 		pr_warn("Failed to restore mute mode\n");
7473 }
7474 
7475 static int volume_alsa_set_volume(const u8 vol)
7476 {
7477 	dbg_printk(TPACPI_DBG_MIXER,
7478 		   "ALSA: trying to set volume level to %hu\n", vol);
7479 	return __volume_set_volume_ec(vol);
7480 }
7481 
7482 static void volume_alsa_notify_change(void)
7483 {
7484 	struct tpacpi_alsa_data *d;
7485 
7486 	if (alsa_card && alsa_card->private_data) {
7487 		d = alsa_card->private_data;
7488 		if (d->ctl_mute_id)
7489 			snd_ctl_notify(alsa_card,
7490 					SNDRV_CTL_EVENT_MASK_VALUE,
7491 					d->ctl_mute_id);
7492 		if (d->ctl_vol_id)
7493 			snd_ctl_notify(alsa_card,
7494 					SNDRV_CTL_EVENT_MASK_VALUE,
7495 					d->ctl_vol_id);
7496 	}
7497 }
7498 
7499 static int volume_alsa_vol_info(struct snd_kcontrol *kcontrol,
7500 				struct snd_ctl_elem_info *uinfo)
7501 {
7502 	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
7503 	uinfo->count = 1;
7504 	uinfo->value.integer.min = 0;
7505 	uinfo->value.integer.max = TP_EC_VOLUME_MAX;
7506 	return 0;
7507 }
7508 
7509 static int volume_alsa_vol_get(struct snd_kcontrol *kcontrol,
7510 				struct snd_ctl_elem_value *ucontrol)
7511 {
7512 	u8 s;
7513 	int rc;
7514 
7515 	rc = volume_get_status(&s);
7516 	if (rc < 0)
7517 		return rc;
7518 
7519 	ucontrol->value.integer.value[0] = s & TP_EC_AUDIO_LVL_MSK;
7520 	return 0;
7521 }
7522 
7523 static int volume_alsa_vol_put(struct snd_kcontrol *kcontrol,
7524 				struct snd_ctl_elem_value *ucontrol)
7525 {
7526 	tpacpi_disclose_usertask("ALSA", "set volume to %ld\n",
7527 				 ucontrol->value.integer.value[0]);
7528 	return volume_alsa_set_volume(ucontrol->value.integer.value[0]);
7529 }
7530 
7531 #define volume_alsa_mute_info snd_ctl_boolean_mono_info
7532 
7533 static int volume_alsa_mute_get(struct snd_kcontrol *kcontrol,
7534 				struct snd_ctl_elem_value *ucontrol)
7535 {
7536 	u8 s;
7537 	int rc;
7538 
7539 	rc = volume_get_status(&s);
7540 	if (rc < 0)
7541 		return rc;
7542 
7543 	ucontrol->value.integer.value[0] =
7544 				(s & TP_EC_AUDIO_MUTESW_MSK) ? 0 : 1;
7545 	return 0;
7546 }
7547 
7548 static int volume_alsa_mute_put(struct snd_kcontrol *kcontrol,
7549 				struct snd_ctl_elem_value *ucontrol)
7550 {
7551 	tpacpi_disclose_usertask("ALSA", "%smute\n",
7552 				 ucontrol->value.integer.value[0] ?
7553 					"un" : "");
7554 	return volume_alsa_set_mute(!ucontrol->value.integer.value[0]);
7555 }
7556 
7557 static struct snd_kcontrol_new volume_alsa_control_vol __initdata = {
7558 	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
7559 	.name = "Console Playback Volume",
7560 	.index = 0,
7561 	.access = SNDRV_CTL_ELEM_ACCESS_READ,
7562 	.info = volume_alsa_vol_info,
7563 	.get = volume_alsa_vol_get,
7564 };
7565 
7566 static struct snd_kcontrol_new volume_alsa_control_mute __initdata = {
7567 	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
7568 	.name = "Console Playback Switch",
7569 	.index = 0,
7570 	.access = SNDRV_CTL_ELEM_ACCESS_READ,
7571 	.info = volume_alsa_mute_info,
7572 	.get = volume_alsa_mute_get,
7573 };
7574 
7575 static void volume_suspend(void)
7576 {
7577 	tpacpi_volume_checkpoint_nvram();
7578 }
7579 
7580 static void volume_resume(void)
7581 {
7582 	if (software_mute_active) {
7583 		if (volume_set_software_mute(false) < 0)
7584 			pr_warn("Failed to restore software mute\n");
7585 	} else {
7586 		volume_alsa_notify_change();
7587 	}
7588 }
7589 
7590 static void volume_shutdown(void)
7591 {
7592 	tpacpi_volume_checkpoint_nvram();
7593 }
7594 
7595 static void volume_exit(void)
7596 {
7597 	if (alsa_card) {
7598 		snd_card_free(alsa_card);
7599 		alsa_card = NULL;
7600 	}
7601 
7602 	tpacpi_volume_checkpoint_nvram();
7603 
7604 	if (software_mute_active)
7605 		volume_exit_software_mute();
7606 }
7607 
7608 static int __init volume_create_alsa_mixer(void)
7609 {
7610 	struct snd_card *card;
7611 	struct tpacpi_alsa_data *data;
7612 	struct snd_kcontrol *ctl_vol;
7613 	struct snd_kcontrol *ctl_mute;
7614 	int rc;
7615 
7616 	rc = snd_card_new(&tpacpi_pdev->dev,
7617 			  alsa_index, alsa_id, THIS_MODULE,
7618 			  sizeof(struct tpacpi_alsa_data), &card);
7619 	if (rc < 0 || !card) {
7620 		pr_err("Failed to create ALSA card structures: %d\n", rc);
7621 		return -ENODEV;
7622 	}
7623 
7624 	BUG_ON(!card->private_data);
7625 	data = card->private_data;
7626 	data->card = card;
7627 
7628 	strscpy(card->driver, TPACPI_ALSA_DRVNAME,
7629 		sizeof(card->driver));
7630 	strscpy(card->shortname, TPACPI_ALSA_SHRTNAME,
7631 		sizeof(card->shortname));
7632 	snprintf(card->mixername, sizeof(card->mixername), "ThinkPad EC %s",
7633 		 (thinkpad_id.ec_version_str) ?
7634 			thinkpad_id.ec_version_str : "(unknown)");
7635 	snprintf(card->longname, sizeof(card->longname),
7636 		 "%s at EC reg 0x%02x, fw %s", card->shortname, TP_EC_AUDIO,
7637 		 (thinkpad_id.ec_version_str) ?
7638 			thinkpad_id.ec_version_str : "unknown");
7639 
7640 	if (volume_control_allowed) {
7641 		volume_alsa_control_vol.put = volume_alsa_vol_put;
7642 		volume_alsa_control_vol.access =
7643 				SNDRV_CTL_ELEM_ACCESS_READWRITE;
7644 
7645 		volume_alsa_control_mute.put = volume_alsa_mute_put;
7646 		volume_alsa_control_mute.access =
7647 				SNDRV_CTL_ELEM_ACCESS_READWRITE;
7648 	}
7649 
7650 	if (!tp_features.mixer_no_level_control) {
7651 		ctl_vol = snd_ctl_new1(&volume_alsa_control_vol, NULL);
7652 		rc = snd_ctl_add(card, ctl_vol);
7653 		if (rc < 0) {
7654 			pr_err("Failed to create ALSA volume control: %d\n",
7655 			       rc);
7656 			goto err_exit;
7657 		}
7658 		data->ctl_vol_id = &ctl_vol->id;
7659 	}
7660 
7661 	ctl_mute = snd_ctl_new1(&volume_alsa_control_mute, NULL);
7662 	rc = snd_ctl_add(card, ctl_mute);
7663 	if (rc < 0) {
7664 		pr_err("Failed to create ALSA mute control: %d\n", rc);
7665 		goto err_exit;
7666 	}
7667 	data->ctl_mute_id = &ctl_mute->id;
7668 
7669 	rc = snd_card_register(card);
7670 	if (rc < 0) {
7671 		pr_err("Failed to register ALSA card: %d\n", rc);
7672 		goto err_exit;
7673 	}
7674 
7675 	alsa_card = card;
7676 	return 0;
7677 
7678 err_exit:
7679 	snd_card_free(card);
7680 	return -ENODEV;
7681 }
7682 
7683 #define TPACPI_VOL_Q_MUTEONLY	0x0001	/* Mute-only control available */
7684 #define TPACPI_VOL_Q_LEVEL	0x0002  /* Volume control available */
7685 
7686 static const struct tpacpi_quirk volume_quirk_table[] __initconst = {
7687 	/* Whitelist volume level on all IBM by default */
7688 	{ .vendor = PCI_VENDOR_ID_IBM,
7689 	  .bios   = TPACPI_MATCH_ANY,
7690 	  .ec     = TPACPI_MATCH_ANY,
7691 	  .quirks = TPACPI_VOL_Q_LEVEL },
7692 
7693 	/* Lenovo models with volume control (needs confirmation) */
7694 	TPACPI_QEC_LNV('7', 'C', TPACPI_VOL_Q_LEVEL), /* R60/i */
7695 	TPACPI_QEC_LNV('7', 'E', TPACPI_VOL_Q_LEVEL), /* R60e/i */
7696 	TPACPI_QEC_LNV('7', '9', TPACPI_VOL_Q_LEVEL), /* T60/p */
7697 	TPACPI_QEC_LNV('7', 'B', TPACPI_VOL_Q_LEVEL), /* X60/s */
7698 	TPACPI_QEC_LNV('7', 'J', TPACPI_VOL_Q_LEVEL), /* X60t */
7699 	TPACPI_QEC_LNV('7', '7', TPACPI_VOL_Q_LEVEL), /* Z60 */
7700 	TPACPI_QEC_LNV('7', 'F', TPACPI_VOL_Q_LEVEL), /* Z61 */
7701 
7702 	/* Whitelist mute-only on all Lenovo by default */
7703 	{ .vendor = PCI_VENDOR_ID_LENOVO,
7704 	  .bios   = TPACPI_MATCH_ANY,
7705 	  .ec	  = TPACPI_MATCH_ANY,
7706 	  .quirks = TPACPI_VOL_Q_MUTEONLY }
7707 };
7708 
7709 static int __init volume_init(struct ibm_init_struct *iibm)
7710 {
7711 	unsigned long quirks;
7712 	int rc;
7713 
7714 	vdbg_printk(TPACPI_DBG_INIT, "initializing volume subdriver\n");
7715 
7716 	mutex_init(&volume_mutex);
7717 
7718 	/*
7719 	 * Check for module parameter bogosity, note that we
7720 	 * init volume_mode to TPACPI_VOL_MODE_MAX in order to be
7721 	 * able to detect "unspecified"
7722 	 */
7723 	if (volume_mode > TPACPI_VOL_MODE_MAX)
7724 		return -EINVAL;
7725 
7726 	if (volume_mode == TPACPI_VOL_MODE_UCMS_STEP) {
7727 		pr_err("UCMS step volume mode not implemented, please contact %s\n",
7728 		       TPACPI_MAIL);
7729 		return -ENODEV;
7730 	}
7731 
7732 	if (volume_capabilities >= TPACPI_VOL_CAP_MAX)
7733 		return -EINVAL;
7734 
7735 	/*
7736 	 * The ALSA mixer is our primary interface.
7737 	 * When disabled, don't install the subdriver at all
7738 	 */
7739 	if (!alsa_enable) {
7740 		vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
7741 			    "ALSA mixer disabled by parameter, not loading volume subdriver...\n");
7742 		return -ENODEV;
7743 	}
7744 
7745 	quirks = tpacpi_check_quirks(volume_quirk_table,
7746 				     ARRAY_SIZE(volume_quirk_table));
7747 
7748 	switch (volume_capabilities) {
7749 	case TPACPI_VOL_CAP_AUTO:
7750 		if (quirks & TPACPI_VOL_Q_MUTEONLY)
7751 			tp_features.mixer_no_level_control = 1;
7752 		else if (quirks & TPACPI_VOL_Q_LEVEL)
7753 			tp_features.mixer_no_level_control = 0;
7754 		else
7755 			return -ENODEV; /* no mixer */
7756 		break;
7757 	case TPACPI_VOL_CAP_VOLMUTE:
7758 		tp_features.mixer_no_level_control = 0;
7759 		break;
7760 	case TPACPI_VOL_CAP_MUTEONLY:
7761 		tp_features.mixer_no_level_control = 1;
7762 		break;
7763 	default:
7764 		return -ENODEV;
7765 	}
7766 
7767 	if (volume_capabilities != TPACPI_VOL_CAP_AUTO)
7768 		dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
7769 				"using user-supplied volume_capabilities=%d\n",
7770 				volume_capabilities);
7771 
7772 	if (volume_mode == TPACPI_VOL_MODE_AUTO ||
7773 	    volume_mode == TPACPI_VOL_MODE_MAX) {
7774 		volume_mode = TPACPI_VOL_MODE_ECNVRAM;
7775 
7776 		dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
7777 				"driver auto-selected volume_mode=%d\n",
7778 				volume_mode);
7779 	} else {
7780 		dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
7781 				"using user-supplied volume_mode=%d\n",
7782 				volume_mode);
7783 	}
7784 
7785 	vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
7786 			"mute is supported, volume control is %s\n",
7787 			str_supported(!tp_features.mixer_no_level_control));
7788 
7789 	if (software_mute_requested && volume_set_software_mute(true) == 0) {
7790 		software_mute_active = true;
7791 	} else {
7792 		rc = volume_create_alsa_mixer();
7793 		if (rc) {
7794 			pr_err("Could not create the ALSA mixer interface\n");
7795 			return rc;
7796 		}
7797 
7798 		pr_info("Console audio control enabled, mode: %s\n",
7799 			(volume_control_allowed) ?
7800 				"override (read/write)" :
7801 				"monitor (read only)");
7802 	}
7803 
7804 	vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
7805 		"registering volume hotkeys as change notification\n");
7806 	tpacpi_hotkey_driver_mask_set(hotkey_driver_mask
7807 			| TP_ACPI_HKEY_VOLUP_MASK
7808 			| TP_ACPI_HKEY_VOLDWN_MASK
7809 			| TP_ACPI_HKEY_MUTE_MASK);
7810 
7811 	return 0;
7812 }
7813 
7814 static int volume_read(struct seq_file *m)
7815 {
7816 	u8 status;
7817 
7818 	if (volume_get_status(&status) < 0) {
7819 		seq_printf(m, "level:\t\tunreadable\n");
7820 	} else {
7821 		if (tp_features.mixer_no_level_control)
7822 			seq_printf(m, "level:\t\tunsupported\n");
7823 		else
7824 			seq_printf(m, "level:\t\t%d\n",
7825 					status & TP_EC_AUDIO_LVL_MSK);
7826 
7827 		seq_printf(m, "mute:\t\t%s\n", str_on_off(status & BIT(TP_EC_AUDIO_MUTESW)));
7828 
7829 		if (volume_control_allowed) {
7830 			seq_printf(m, "commands:\tunmute, mute\n");
7831 			if (!tp_features.mixer_no_level_control) {
7832 				seq_printf(m, "commands:\tup, down\n");
7833 				seq_printf(m, "commands:\tlevel <level> (<level> is 0-%d)\n",
7834 					      TP_EC_VOLUME_MAX);
7835 			}
7836 		}
7837 	}
7838 
7839 	return 0;
7840 }
7841 
7842 static int volume_write(char *buf)
7843 {
7844 	u8 s;
7845 	u8 new_level, new_mute;
7846 	int l;
7847 	char *cmd;
7848 	int rc;
7849 
7850 	/*
7851 	 * We do allow volume control at driver startup, so that the
7852 	 * user can set initial state through the volume=... parameter hack.
7853 	 */
7854 	if (!volume_control_allowed && tpacpi_lifecycle != TPACPI_LIFE_INIT) {
7855 		if (unlikely(!tp_warned.volume_ctrl_forbidden)) {
7856 			tp_warned.volume_ctrl_forbidden = 1;
7857 			pr_notice("Console audio control in monitor mode, changes are not allowed\n");
7858 			pr_notice("Use the volume_control=1 module parameter to enable volume control\n");
7859 		}
7860 		return -EPERM;
7861 	}
7862 
7863 	rc = volume_get_status(&s);
7864 	if (rc < 0)
7865 		return rc;
7866 
7867 	new_level = s & TP_EC_AUDIO_LVL_MSK;
7868 	new_mute  = s & TP_EC_AUDIO_MUTESW_MSK;
7869 
7870 	while ((cmd = strsep(&buf, ","))) {
7871 		if (!tp_features.mixer_no_level_control) {
7872 			if (strlencmp(cmd, "up") == 0) {
7873 				if (new_mute)
7874 					new_mute = 0;
7875 				else if (new_level < TP_EC_VOLUME_MAX)
7876 					new_level++;
7877 				continue;
7878 			} else if (strlencmp(cmd, "down") == 0) {
7879 				if (new_mute)
7880 					new_mute = 0;
7881 				else if (new_level > 0)
7882 					new_level--;
7883 				continue;
7884 			} else if (sscanf(cmd, "level %u", &l) == 1 &&
7885 				   l >= 0 && l <= TP_EC_VOLUME_MAX) {
7886 				new_level = l;
7887 				continue;
7888 			}
7889 		}
7890 		if (strlencmp(cmd, "mute") == 0)
7891 			new_mute = TP_EC_AUDIO_MUTESW_MSK;
7892 		else if (strlencmp(cmd, "unmute") == 0)
7893 			new_mute = 0;
7894 		else
7895 			return -EINVAL;
7896 	}
7897 
7898 	if (tp_features.mixer_no_level_control) {
7899 		tpacpi_disclose_usertask("procfs volume", "%smute\n",
7900 					new_mute ? "" : "un");
7901 		rc = volume_set_mute(!!new_mute);
7902 	} else {
7903 		tpacpi_disclose_usertask("procfs volume",
7904 					"%smute and set level to %d\n",
7905 					new_mute ? "" : "un", new_level);
7906 		rc = volume_set_status(new_mute | new_level);
7907 	}
7908 	volume_alsa_notify_change();
7909 
7910 	return (rc == -EINTR) ? -ERESTARTSYS : rc;
7911 }
7912 
7913 static struct ibm_struct volume_driver_data = {
7914 	.name = "volume",
7915 	.read = volume_read,
7916 	.write = volume_write,
7917 	.exit = volume_exit,
7918 	.suspend = volume_suspend,
7919 	.resume = volume_resume,
7920 	.shutdown = volume_shutdown,
7921 };
7922 
7923 #else /* !CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */
7924 
7925 #define alsa_card NULL
7926 
7927 static inline void volume_alsa_notify_change(void)
7928 {
7929 }
7930 
7931 static int __init volume_init(struct ibm_init_struct *iibm)
7932 {
7933 	pr_info("volume: disabled as there is no ALSA support in this kernel\n");
7934 
7935 	return -ENODEV;
7936 }
7937 
7938 static struct ibm_struct volume_driver_data = {
7939 	.name = "volume",
7940 };
7941 
7942 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */
7943 
7944 /*************************************************************************
7945  * Fan subdriver
7946  */
7947 
7948 /*
7949  * FAN ACCESS MODES
7950  *
7951  * TPACPI_FAN_RD_ACPI_GFAN:
7952  * 	ACPI GFAN method: returns fan level
7953  *
7954  * 	see TPACPI_FAN_WR_ACPI_SFAN
7955  * 	EC 0x2f (HFSP) not available if GFAN exists
7956  *
7957  * TPACPI_FAN_WR_ACPI_SFAN:
7958  * 	ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
7959  *
7960  * 	EC 0x2f (HFSP) might be available *for reading*, but do not use
7961  * 	it for writing.
7962  *
7963  * TPACPI_FAN_WR_TPEC:
7964  * 	ThinkPad EC register 0x2f (HFSP): fan control loop mode
7965  * 	Supported on almost all ThinkPads
7966  *
7967  * 	Fan speed changes of any sort (including those caused by the
7968  * 	disengaged mode) are usually done slowly by the firmware as the
7969  * 	maximum amount of fan duty cycle change per second seems to be
7970  * 	limited.
7971  *
7972  * 	Reading is not available if GFAN exists.
7973  * 	Writing is not available if SFAN exists.
7974  *
7975  * 	Bits
7976  *	 7	automatic mode engaged;
7977  *  		(default operation mode of the ThinkPad)
7978  * 		fan level is ignored in this mode.
7979  *	 6	full speed mode (takes precedence over bit 7);
7980  *		not available on all thinkpads.  May disable
7981  *		the tachometer while the fan controller ramps up
7982  *		the speed (which can take up to a few *minutes*).
7983  *		Speeds up fan to 100% duty-cycle, which is far above
7984  *		the standard RPM levels.  It is not impossible that
7985  *		it could cause hardware damage.
7986  *	5-3	unused in some models.  Extra bits for fan level
7987  *		in others, but still useless as all values above
7988  *		7 map to the same speed as level 7 in these models.
7989  *	2-0	fan level (0..7 usually)
7990  *			0x00 = stop
7991  * 			0x07 = max (set when temperatures critical)
7992  * 		Some ThinkPads may have other levels, see
7993  * 		TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
7994  *
7995  *	FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
7996  *	boot. Apparently the EC does not initialize it, so unless ACPI DSDT
7997  *	does so, its initial value is meaningless (0x07).
7998  *
7999  *	For firmware bugs, refer to:
8000  *	https://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
8001  *
8002  * 	----
8003  *
8004  *	ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
8005  *	Main fan tachometer reading (in RPM)
8006  *
8007  *	This register is present on all ThinkPads with a new-style EC, and
8008  *	it is known not to be present on the A21m/e, and T22, as there is
8009  *	something else in offset 0x84 according to the ACPI DSDT.  Other
8010  *	ThinkPads from this same time period (and earlier) probably lack the
8011  *	tachometer as well.
8012  *
8013  *	Unfortunately a lot of ThinkPads with new-style ECs but whose firmware
8014  *	was never fixed by IBM to report the EC firmware version string
8015  *	probably support the tachometer (like the early X models), so
8016  *	detecting it is quite hard.  We need more data to know for sure.
8017  *
8018  *	FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
8019  *	might result.
8020  *
8021  *	FIRMWARE BUG: may go stale while the EC is switching to full speed
8022  *	mode.
8023  *
8024  *	For firmware bugs, refer to:
8025  *	https://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
8026  *
8027  *	----
8028  *
8029  *	ThinkPad EC register 0x31 bit 0 (only on select models)
8030  *
8031  *	When bit 0 of EC register 0x31 is zero, the tachometer registers
8032  *	show the speed of the main fan.  When bit 0 of EC register 0x31
8033  *	is one, the tachometer registers show the speed of the auxiliary
8034  *	fan.
8035  *
8036  *	Fan control seems to affect both fans, regardless of the state
8037  *	of this bit.
8038  *
8039  *	So far, only the firmware for the X60/X61 non-tablet versions
8040  *	seem to support this (firmware TP-7M).
8041  *
8042  * TPACPI_FAN_WR_ACPI_FANS:
8043  *	ThinkPad X31, X40, X41.  Not available in the X60.
8044  *
8045  *	FANS ACPI handle: takes three arguments: low speed, medium speed,
8046  *	high speed.  ACPI DSDT seems to map these three speeds to levels
8047  *	as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
8048  *	(this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
8049  *
8050  * 	The speeds are stored on handles
8051  * 	(FANA:FAN9), (FANC:FANB), (FANE:FAND).
8052  *
8053  * 	There are three default speed sets, accessible as handles:
8054  * 	FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
8055  *
8056  * 	ACPI DSDT switches which set is in use depending on various
8057  * 	factors.
8058  *
8059  * 	TPACPI_FAN_WR_TPEC is also available and should be used to
8060  * 	command the fan.  The X31/X40/X41 seems to have 8 fan levels,
8061  * 	but the ACPI tables just mention level 7.
8062  */
8063 
8064 enum {					/* Fan control constants */
8065 	fan_status_offset = 0x2f,	/* EC register 0x2f */
8066 	fan_rpm_offset = 0x84,		/* EC register 0x84: LSB, 0x85 MSB (RPM)
8067 					 * 0x84 must be read before 0x85 */
8068 	fan_select_offset = 0x31,	/* EC register 0x31 (Firmware 7M)
8069 					   bit 0 selects which fan is active */
8070 
8071 	TP_EC_FAN_FULLSPEED = 0x40,	/* EC fan mode: full speed */
8072 	TP_EC_FAN_AUTO	    = 0x80,	/* EC fan mode: auto fan control */
8073 
8074 	TPACPI_FAN_LAST_LEVEL = 0x100,	/* Use cached last-seen fan level */
8075 };
8076 
8077 enum fan_status_access_mode {
8078 	TPACPI_FAN_NONE = 0,		/* No fan status or control */
8079 	TPACPI_FAN_RD_ACPI_GFAN,	/* Use ACPI GFAN */
8080 	TPACPI_FAN_RD_TPEC,		/* Use ACPI EC regs 0x2f, 0x84-0x85 */
8081 };
8082 
8083 enum fan_control_access_mode {
8084 	TPACPI_FAN_WR_NONE = 0,		/* No fan control */
8085 	TPACPI_FAN_WR_ACPI_SFAN,	/* Use ACPI SFAN */
8086 	TPACPI_FAN_WR_TPEC,		/* Use ACPI EC reg 0x2f */
8087 	TPACPI_FAN_WR_ACPI_FANS,	/* Use ACPI FANS and EC reg 0x2f */
8088 };
8089 
8090 enum fan_control_commands {
8091 	TPACPI_FAN_CMD_SPEED 	= 0x0001,	/* speed command */
8092 	TPACPI_FAN_CMD_LEVEL 	= 0x0002,	/* level command  */
8093 	TPACPI_FAN_CMD_ENABLE	= 0x0004,	/* enable/disable cmd,
8094 						 * and also watchdog cmd */
8095 };
8096 
8097 static bool fan_control_allowed;
8098 
8099 static enum fan_status_access_mode fan_status_access_mode;
8100 static enum fan_control_access_mode fan_control_access_mode;
8101 static enum fan_control_commands fan_control_commands;
8102 
8103 static u8 fan_control_initial_status;
8104 static u8 fan_control_desired_level;
8105 static u8 fan_control_resume_level;
8106 static int fan_watchdog_maxinterval;
8107 
8108 static struct mutex fan_mutex;
8109 
8110 static void fan_watchdog_fire(struct work_struct *ignored);
8111 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
8112 
8113 TPACPI_HANDLE(fans, ec, "FANS");	/* X31, X40, X41 */
8114 TPACPI_HANDLE(gfan, ec, "GFAN",	/* 570 */
8115 	   "\\FSPD",		/* 600e/x, 770e, 770x */
8116 	   );			/* all others */
8117 TPACPI_HANDLE(sfan, ec, "SFAN",	/* 570 */
8118 	   "JFNS",		/* 770x-JL */
8119 	   );			/* all others */
8120 
8121 /*
8122  * Unitialized HFSP quirk: ACPI DSDT and EC fail to initialize the
8123  * HFSP register at boot, so it contains 0x07 but the Thinkpad could
8124  * be in auto mode (0x80).
8125  *
8126  * This is corrected by any write to HFSP either by the driver, or
8127  * by the firmware.
8128  *
8129  * We assume 0x07 really means auto mode while this quirk is active,
8130  * as this is far more likely than the ThinkPad being in level 7,
8131  * which is only used by the firmware during thermal emergencies.
8132  *
8133  * Enable for TP-1Y (T43), TP-78 (R51e), TP-76 (R52),
8134  * TP-70 (T43, R52), which are known to be buggy.
8135  */
8136 
8137 static void fan_quirk1_setup(void)
8138 {
8139 	if (fan_control_initial_status == 0x07) {
8140 		pr_notice("fan_init: initial fan status is unknown, assuming it is in auto mode\n");
8141 		tp_features.fan_ctrl_status_undef = 1;
8142 	}
8143 }
8144 
8145 static void fan_quirk1_handle(u8 *fan_status)
8146 {
8147 	if (unlikely(tp_features.fan_ctrl_status_undef)) {
8148 		if (*fan_status != fan_control_initial_status) {
8149 			/* something changed the HFSP regisnter since
8150 			 * driver init time, so it is not undefined
8151 			 * anymore */
8152 			tp_features.fan_ctrl_status_undef = 0;
8153 		} else {
8154 			/* Return most likely status. In fact, it
8155 			 * might be the only possible status */
8156 			*fan_status = TP_EC_FAN_AUTO;
8157 		}
8158 	}
8159 }
8160 
8161 /* Select main fan on X60/X61, NOOP on others */
8162 static bool fan_select_fan1(void)
8163 {
8164 	if (tp_features.second_fan) {
8165 		u8 val;
8166 
8167 		if (ec_read(fan_select_offset, &val) < 0)
8168 			return false;
8169 		val &= 0xFEU;
8170 		if (ec_write(fan_select_offset, val) < 0)
8171 			return false;
8172 	}
8173 	return true;
8174 }
8175 
8176 /* Select secondary fan on X60/X61 */
8177 static bool fan_select_fan2(void)
8178 {
8179 	u8 val;
8180 
8181 	if (!tp_features.second_fan)
8182 		return false;
8183 
8184 	if (ec_read(fan_select_offset, &val) < 0)
8185 		return false;
8186 	val |= 0x01U;
8187 	if (ec_write(fan_select_offset, val) < 0)
8188 		return false;
8189 
8190 	return true;
8191 }
8192 
8193 /*
8194  * Call with fan_mutex held
8195  */
8196 static void fan_update_desired_level(u8 status)
8197 {
8198 	if ((status &
8199 	     (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
8200 		if (status > 7)
8201 			fan_control_desired_level = 7;
8202 		else
8203 			fan_control_desired_level = status;
8204 	}
8205 }
8206 
8207 static int fan_get_status(u8 *status)
8208 {
8209 	u8 s;
8210 
8211 	/* TODO:
8212 	 * Add TPACPI_FAN_RD_ACPI_FANS ? */
8213 
8214 	switch (fan_status_access_mode) {
8215 	case TPACPI_FAN_RD_ACPI_GFAN: {
8216 		/* 570, 600e/x, 770e, 770x */
8217 		int res;
8218 
8219 		if (unlikely(!acpi_evalf(gfan_handle, &res, NULL, "d")))
8220 			return -EIO;
8221 
8222 		if (likely(status))
8223 			*status = res & 0x07;
8224 
8225 		break;
8226 	}
8227 	case TPACPI_FAN_RD_TPEC:
8228 		/* all except 570, 600e/x, 770e, 770x */
8229 		if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
8230 			return -EIO;
8231 
8232 		if (likely(status)) {
8233 			*status = s;
8234 			fan_quirk1_handle(status);
8235 		}
8236 
8237 		break;
8238 
8239 	default:
8240 		return -ENXIO;
8241 	}
8242 
8243 	return 0;
8244 }
8245 
8246 static int fan_get_status_safe(u8 *status)
8247 {
8248 	int rc;
8249 	u8 s;
8250 
8251 	if (mutex_lock_killable(&fan_mutex))
8252 		return -ERESTARTSYS;
8253 	rc = fan_get_status(&s);
8254 	if (!rc)
8255 		fan_update_desired_level(s);
8256 	mutex_unlock(&fan_mutex);
8257 
8258 	if (rc)
8259 		return rc;
8260 	if (status)
8261 		*status = s;
8262 
8263 	return 0;
8264 }
8265 
8266 static int fan_get_speed(unsigned int *speed)
8267 {
8268 	u8 hi, lo;
8269 
8270 	switch (fan_status_access_mode) {
8271 	case TPACPI_FAN_RD_TPEC:
8272 		/* all except 570, 600e/x, 770e, 770x */
8273 		if (unlikely(!fan_select_fan1()))
8274 			return -EIO;
8275 		if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
8276 			     !acpi_ec_read(fan_rpm_offset + 1, &hi)))
8277 			return -EIO;
8278 
8279 		if (likely(speed))
8280 			*speed = (hi << 8) | lo;
8281 
8282 		break;
8283 
8284 	default:
8285 		return -ENXIO;
8286 	}
8287 
8288 	return 0;
8289 }
8290 
8291 static int fan2_get_speed(unsigned int *speed)
8292 {
8293 	u8 hi, lo;
8294 	bool rc;
8295 
8296 	switch (fan_status_access_mode) {
8297 	case TPACPI_FAN_RD_TPEC:
8298 		/* all except 570, 600e/x, 770e, 770x */
8299 		if (unlikely(!fan_select_fan2()))
8300 			return -EIO;
8301 		rc = !acpi_ec_read(fan_rpm_offset, &lo) ||
8302 			     !acpi_ec_read(fan_rpm_offset + 1, &hi);
8303 		fan_select_fan1(); /* play it safe */
8304 		if (rc)
8305 			return -EIO;
8306 
8307 		if (likely(speed))
8308 			*speed = (hi << 8) | lo;
8309 
8310 		break;
8311 
8312 	default:
8313 		return -ENXIO;
8314 	}
8315 
8316 	return 0;
8317 }
8318 
8319 static int fan_set_level(int level)
8320 {
8321 	if (!fan_control_allowed)
8322 		return -EPERM;
8323 
8324 	switch (fan_control_access_mode) {
8325 	case TPACPI_FAN_WR_ACPI_SFAN:
8326 		if ((level < 0) || (level > 7))
8327 			return -EINVAL;
8328 
8329 		if (tp_features.second_fan_ctl) {
8330 			if (!fan_select_fan2() ||
8331 			    !acpi_evalf(sfan_handle, NULL, NULL, "vd", level)) {
8332 				pr_warn("Couldn't set 2nd fan level, disabling support\n");
8333 				tp_features.second_fan_ctl = 0;
8334 			}
8335 			fan_select_fan1();
8336 		}
8337 		if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
8338 			return -EIO;
8339 		break;
8340 
8341 	case TPACPI_FAN_WR_ACPI_FANS:
8342 	case TPACPI_FAN_WR_TPEC:
8343 		if (!(level & TP_EC_FAN_AUTO) &&
8344 		    !(level & TP_EC_FAN_FULLSPEED) &&
8345 		    ((level < 0) || (level > 7)))
8346 			return -EINVAL;
8347 
8348 		/* safety net should the EC not support AUTO
8349 		 * or FULLSPEED mode bits and just ignore them */
8350 		if (level & TP_EC_FAN_FULLSPEED)
8351 			level |= 7;	/* safety min speed 7 */
8352 		else if (level & TP_EC_FAN_AUTO)
8353 			level |= 4;	/* safety min speed 4 */
8354 
8355 		if (tp_features.second_fan_ctl) {
8356 			if (!fan_select_fan2() ||
8357 			    !acpi_ec_write(fan_status_offset, level)) {
8358 				pr_warn("Couldn't set 2nd fan level, disabling support\n");
8359 				tp_features.second_fan_ctl = 0;
8360 			}
8361 			fan_select_fan1();
8362 
8363 		}
8364 		if (!acpi_ec_write(fan_status_offset, level))
8365 			return -EIO;
8366 		else
8367 			tp_features.fan_ctrl_status_undef = 0;
8368 		break;
8369 
8370 	default:
8371 		return -ENXIO;
8372 	}
8373 
8374 	vdbg_printk(TPACPI_DBG_FAN,
8375 		"fan control: set fan control register to 0x%02x\n", level);
8376 	return 0;
8377 }
8378 
8379 static int fan_set_level_safe(int level)
8380 {
8381 	int rc;
8382 
8383 	if (!fan_control_allowed)
8384 		return -EPERM;
8385 
8386 	if (mutex_lock_killable(&fan_mutex))
8387 		return -ERESTARTSYS;
8388 
8389 	if (level == TPACPI_FAN_LAST_LEVEL)
8390 		level = fan_control_desired_level;
8391 
8392 	rc = fan_set_level(level);
8393 	if (!rc)
8394 		fan_update_desired_level(level);
8395 
8396 	mutex_unlock(&fan_mutex);
8397 	return rc;
8398 }
8399 
8400 static int fan_set_enable(void)
8401 {
8402 	u8 s;
8403 	int rc;
8404 
8405 	if (!fan_control_allowed)
8406 		return -EPERM;
8407 
8408 	if (mutex_lock_killable(&fan_mutex))
8409 		return -ERESTARTSYS;
8410 
8411 	switch (fan_control_access_mode) {
8412 	case TPACPI_FAN_WR_ACPI_FANS:
8413 	case TPACPI_FAN_WR_TPEC:
8414 		rc = fan_get_status(&s);
8415 		if (rc)
8416 			break;
8417 
8418 		/* Don't go out of emergency fan mode */
8419 		if (s != 7) {
8420 			s &= 0x07;
8421 			s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
8422 		}
8423 
8424 		if (!acpi_ec_write(fan_status_offset, s))
8425 			rc = -EIO;
8426 		else {
8427 			tp_features.fan_ctrl_status_undef = 0;
8428 			rc = 0;
8429 		}
8430 		break;
8431 
8432 	case TPACPI_FAN_WR_ACPI_SFAN:
8433 		rc = fan_get_status(&s);
8434 		if (rc)
8435 			break;
8436 
8437 		s &= 0x07;
8438 
8439 		/* Set fan to at least level 4 */
8440 		s |= 4;
8441 
8442 		if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
8443 			rc = -EIO;
8444 		else
8445 			rc = 0;
8446 		break;
8447 
8448 	default:
8449 		rc = -ENXIO;
8450 	}
8451 
8452 	mutex_unlock(&fan_mutex);
8453 
8454 	if (!rc)
8455 		vdbg_printk(TPACPI_DBG_FAN,
8456 			"fan control: set fan control register to 0x%02x\n",
8457 			s);
8458 	return rc;
8459 }
8460 
8461 static int fan_set_disable(void)
8462 {
8463 	int rc;
8464 
8465 	if (!fan_control_allowed)
8466 		return -EPERM;
8467 
8468 	if (mutex_lock_killable(&fan_mutex))
8469 		return -ERESTARTSYS;
8470 
8471 	rc = 0;
8472 	switch (fan_control_access_mode) {
8473 	case TPACPI_FAN_WR_ACPI_FANS:
8474 	case TPACPI_FAN_WR_TPEC:
8475 		if (!acpi_ec_write(fan_status_offset, 0x00))
8476 			rc = -EIO;
8477 		else {
8478 			fan_control_desired_level = 0;
8479 			tp_features.fan_ctrl_status_undef = 0;
8480 		}
8481 		break;
8482 
8483 	case TPACPI_FAN_WR_ACPI_SFAN:
8484 		if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
8485 			rc = -EIO;
8486 		else
8487 			fan_control_desired_level = 0;
8488 		break;
8489 
8490 	default:
8491 		rc = -ENXIO;
8492 	}
8493 
8494 	if (!rc)
8495 		vdbg_printk(TPACPI_DBG_FAN,
8496 			"fan control: set fan control register to 0\n");
8497 
8498 	mutex_unlock(&fan_mutex);
8499 	return rc;
8500 }
8501 
8502 static int fan_set_speed(int speed)
8503 {
8504 	int rc;
8505 
8506 	if (!fan_control_allowed)
8507 		return -EPERM;
8508 
8509 	if (mutex_lock_killable(&fan_mutex))
8510 		return -ERESTARTSYS;
8511 
8512 	rc = 0;
8513 	switch (fan_control_access_mode) {
8514 	case TPACPI_FAN_WR_ACPI_FANS:
8515 		if (speed >= 0 && speed <= 65535) {
8516 			if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
8517 					speed, speed, speed))
8518 				rc = -EIO;
8519 		} else
8520 			rc = -EINVAL;
8521 		break;
8522 
8523 	default:
8524 		rc = -ENXIO;
8525 	}
8526 
8527 	mutex_unlock(&fan_mutex);
8528 	return rc;
8529 }
8530 
8531 static void fan_watchdog_reset(void)
8532 {
8533 	if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
8534 		return;
8535 
8536 	if (fan_watchdog_maxinterval > 0 &&
8537 	    tpacpi_lifecycle != TPACPI_LIFE_EXITING)
8538 		mod_delayed_work(tpacpi_wq, &fan_watchdog_task,
8539 			msecs_to_jiffies(fan_watchdog_maxinterval * 1000));
8540 	else
8541 		cancel_delayed_work(&fan_watchdog_task);
8542 }
8543 
8544 static void fan_watchdog_fire(struct work_struct *ignored)
8545 {
8546 	int rc;
8547 
8548 	if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
8549 		return;
8550 
8551 	pr_notice("fan watchdog: enabling fan\n");
8552 	rc = fan_set_enable();
8553 	if (rc < 0) {
8554 		pr_err("fan watchdog: error %d while enabling fan, will try again later...\n",
8555 		       rc);
8556 		/* reschedule for later */
8557 		fan_watchdog_reset();
8558 	}
8559 }
8560 
8561 /*
8562  * SYSFS fan layout: hwmon compatible (device)
8563  *
8564  * pwm*_enable:
8565  * 	0: "disengaged" mode
8566  * 	1: manual mode
8567  * 	2: native EC "auto" mode (recommended, hardware default)
8568  *
8569  * pwm*: set speed in manual mode, ignored otherwise.
8570  * 	0 is level 0; 255 is level 7. Intermediate points done with linear
8571  * 	interpolation.
8572  *
8573  * fan*_input: tachometer reading, RPM
8574  *
8575  *
8576  * SYSFS fan layout: extensions
8577  *
8578  * fan_watchdog (driver):
8579  * 	fan watchdog interval in seconds, 0 disables (default), max 120
8580  */
8581 
8582 /* sysfs fan pwm1_enable ----------------------------------------------- */
8583 static ssize_t fan_pwm1_enable_show(struct device *dev,
8584 				    struct device_attribute *attr,
8585 				    char *buf)
8586 {
8587 	int res, mode;
8588 	u8 status;
8589 
8590 	res = fan_get_status_safe(&status);
8591 	if (res)
8592 		return res;
8593 
8594 	if (status & TP_EC_FAN_FULLSPEED) {
8595 		mode = 0;
8596 	} else if (status & TP_EC_FAN_AUTO) {
8597 		mode = 2;
8598 	} else
8599 		mode = 1;
8600 
8601 	return sysfs_emit(buf, "%d\n", mode);
8602 }
8603 
8604 static ssize_t fan_pwm1_enable_store(struct device *dev,
8605 				     struct device_attribute *attr,
8606 				     const char *buf, size_t count)
8607 {
8608 	unsigned long t;
8609 	int res, level;
8610 
8611 	if (parse_strtoul(buf, 2, &t))
8612 		return -EINVAL;
8613 
8614 	tpacpi_disclose_usertask("hwmon pwm1_enable",
8615 			"set fan mode to %lu\n", t);
8616 
8617 	switch (t) {
8618 	case 0:
8619 		level = TP_EC_FAN_FULLSPEED;
8620 		break;
8621 	case 1:
8622 		level = TPACPI_FAN_LAST_LEVEL;
8623 		break;
8624 	case 2:
8625 		level = TP_EC_FAN_AUTO;
8626 		break;
8627 	case 3:
8628 		/* reserved for software-controlled auto mode */
8629 		return -ENOSYS;
8630 	default:
8631 		return -EINVAL;
8632 	}
8633 
8634 	res = fan_set_level_safe(level);
8635 	if (res == -ENXIO)
8636 		return -EINVAL;
8637 	else if (res < 0)
8638 		return res;
8639 
8640 	fan_watchdog_reset();
8641 
8642 	return count;
8643 }
8644 
8645 static DEVICE_ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
8646 		   fan_pwm1_enable_show, fan_pwm1_enable_store);
8647 
8648 /* sysfs fan pwm1 ------------------------------------------------------ */
8649 static ssize_t fan_pwm1_show(struct device *dev,
8650 			     struct device_attribute *attr,
8651 			     char *buf)
8652 {
8653 	int res;
8654 	u8 status;
8655 
8656 	res = fan_get_status_safe(&status);
8657 	if (res)
8658 		return res;
8659 
8660 	if ((status &
8661 	     (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
8662 		status = fan_control_desired_level;
8663 
8664 	if (status > 7)
8665 		status = 7;
8666 
8667 	return sysfs_emit(buf, "%u\n", (status * 255) / 7);
8668 }
8669 
8670 static ssize_t fan_pwm1_store(struct device *dev,
8671 			      struct device_attribute *attr,
8672 			      const char *buf, size_t count)
8673 {
8674 	unsigned long s;
8675 	int rc;
8676 	u8 status, newlevel;
8677 
8678 	if (parse_strtoul(buf, 255, &s))
8679 		return -EINVAL;
8680 
8681 	tpacpi_disclose_usertask("hwmon pwm1",
8682 			"set fan speed to %lu\n", s);
8683 
8684 	/* scale down from 0-255 to 0-7 */
8685 	newlevel = (s >> 5) & 0x07;
8686 
8687 	if (mutex_lock_killable(&fan_mutex))
8688 		return -ERESTARTSYS;
8689 
8690 	rc = fan_get_status(&status);
8691 	if (!rc && (status &
8692 		    (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
8693 		rc = fan_set_level(newlevel);
8694 		if (rc == -ENXIO)
8695 			rc = -EINVAL;
8696 		else if (!rc) {
8697 			fan_update_desired_level(newlevel);
8698 			fan_watchdog_reset();
8699 		}
8700 	}
8701 
8702 	mutex_unlock(&fan_mutex);
8703 	return (rc) ? rc : count;
8704 }
8705 
8706 static DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, fan_pwm1_show, fan_pwm1_store);
8707 
8708 /* sysfs fan fan1_input ------------------------------------------------ */
8709 static ssize_t fan_fan1_input_show(struct device *dev,
8710 			   struct device_attribute *attr,
8711 			   char *buf)
8712 {
8713 	int res;
8714 	unsigned int speed;
8715 
8716 	res = fan_get_speed(&speed);
8717 	if (res < 0)
8718 		return res;
8719 
8720 	return sysfs_emit(buf, "%u\n", speed);
8721 }
8722 
8723 static DEVICE_ATTR(fan1_input, S_IRUGO, fan_fan1_input_show, NULL);
8724 
8725 /* sysfs fan fan2_input ------------------------------------------------ */
8726 static ssize_t fan_fan2_input_show(struct device *dev,
8727 			   struct device_attribute *attr,
8728 			   char *buf)
8729 {
8730 	int res;
8731 	unsigned int speed;
8732 
8733 	res = fan2_get_speed(&speed);
8734 	if (res < 0)
8735 		return res;
8736 
8737 	return sysfs_emit(buf, "%u\n", speed);
8738 }
8739 
8740 static DEVICE_ATTR(fan2_input, S_IRUGO, fan_fan2_input_show, NULL);
8741 
8742 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */
8743 static ssize_t fan_watchdog_show(struct device_driver *drv, char *buf)
8744 {
8745 	return sysfs_emit(buf, "%u\n", fan_watchdog_maxinterval);
8746 }
8747 
8748 static ssize_t fan_watchdog_store(struct device_driver *drv, const char *buf,
8749 				  size_t count)
8750 {
8751 	unsigned long t;
8752 
8753 	if (parse_strtoul(buf, 120, &t))
8754 		return -EINVAL;
8755 
8756 	if (!fan_control_allowed)
8757 		return -EPERM;
8758 
8759 	fan_watchdog_maxinterval = t;
8760 	fan_watchdog_reset();
8761 
8762 	tpacpi_disclose_usertask("fan_watchdog", "set to %lu\n", t);
8763 
8764 	return count;
8765 }
8766 static DRIVER_ATTR_RW(fan_watchdog);
8767 
8768 /* --------------------------------------------------------------------- */
8769 
8770 static struct attribute *fan_attributes[] = {
8771 	&dev_attr_pwm1_enable.attr,
8772 	&dev_attr_pwm1.attr,
8773 	&dev_attr_fan1_input.attr,
8774 	&dev_attr_fan2_input.attr,
8775 	NULL
8776 };
8777 
8778 static umode_t fan_attr_is_visible(struct kobject *kobj, struct attribute *attr,
8779 				   int n)
8780 {
8781 	if (fan_status_access_mode == TPACPI_FAN_NONE &&
8782 	    fan_control_access_mode == TPACPI_FAN_WR_NONE)
8783 		return 0;
8784 
8785 	if (attr == &dev_attr_fan2_input.attr) {
8786 		if (!tp_features.second_fan)
8787 			return 0;
8788 	}
8789 
8790 	return attr->mode;
8791 }
8792 
8793 static const struct attribute_group fan_attr_group = {
8794 	.is_visible = fan_attr_is_visible,
8795 	.attrs = fan_attributes,
8796 };
8797 
8798 static struct attribute *fan_driver_attributes[] = {
8799 	&driver_attr_fan_watchdog.attr,
8800 	NULL
8801 };
8802 
8803 static const struct attribute_group fan_driver_attr_group = {
8804 	.is_visible = fan_attr_is_visible,
8805 	.attrs = fan_driver_attributes,
8806 };
8807 
8808 #define TPACPI_FAN_Q1		0x0001		/* Uninitialized HFSP */
8809 #define TPACPI_FAN_2FAN		0x0002		/* EC 0x31 bit 0 selects fan2 */
8810 #define TPACPI_FAN_2CTL		0x0004		/* selects fan2 control */
8811 #define TPACPI_FAN_NOFAN	0x0008		/* no fan available */
8812 
8813 static const struct tpacpi_quirk fan_quirk_table[] __initconst = {
8814 	TPACPI_QEC_IBM('1', 'Y', TPACPI_FAN_Q1),
8815 	TPACPI_QEC_IBM('7', '8', TPACPI_FAN_Q1),
8816 	TPACPI_QEC_IBM('7', '6', TPACPI_FAN_Q1),
8817 	TPACPI_QEC_IBM('7', '0', TPACPI_FAN_Q1),
8818 	TPACPI_QEC_LNV('7', 'M', TPACPI_FAN_2FAN),
8819 	TPACPI_Q_LNV('N', '1', TPACPI_FAN_2FAN),
8820 	TPACPI_Q_LNV3('N', '1', 'D', TPACPI_FAN_2CTL),	/* P70 */
8821 	TPACPI_Q_LNV3('N', '1', 'E', TPACPI_FAN_2CTL),	/* P50 */
8822 	TPACPI_Q_LNV3('N', '1', 'T', TPACPI_FAN_2CTL),	/* P71 */
8823 	TPACPI_Q_LNV3('N', '1', 'U', TPACPI_FAN_2CTL),	/* P51 */
8824 	TPACPI_Q_LNV3('N', '2', 'C', TPACPI_FAN_2CTL),	/* P52 / P72 */
8825 	TPACPI_Q_LNV3('N', '2', 'N', TPACPI_FAN_2CTL),	/* P53 / P73 */
8826 	TPACPI_Q_LNV3('N', '2', 'E', TPACPI_FAN_2CTL),	/* P1 / X1 Extreme (1st gen) */
8827 	TPACPI_Q_LNV3('N', '2', 'O', TPACPI_FAN_2CTL),	/* P1 / X1 Extreme (2nd gen) */
8828 	TPACPI_Q_LNV3('N', '3', '0', TPACPI_FAN_2CTL),	/* P15 (1st gen) / P15v (1st gen) */
8829 	TPACPI_Q_LNV3('N', '3', '7', TPACPI_FAN_2CTL),  /* T15g (2nd gen) */
8830 	TPACPI_Q_LNV3('N', '1', 'O', TPACPI_FAN_NOFAN),	/* X1 Tablet (2nd gen) */
8831 };
8832 
8833 static int __init fan_init(struct ibm_init_struct *iibm)
8834 {
8835 	unsigned long quirks;
8836 
8837 	vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
8838 			"initializing fan subdriver\n");
8839 
8840 	mutex_init(&fan_mutex);
8841 	fan_status_access_mode = TPACPI_FAN_NONE;
8842 	fan_control_access_mode = TPACPI_FAN_WR_NONE;
8843 	fan_control_commands = 0;
8844 	fan_watchdog_maxinterval = 0;
8845 	tp_features.fan_ctrl_status_undef = 0;
8846 	tp_features.second_fan = 0;
8847 	tp_features.second_fan_ctl = 0;
8848 	fan_control_desired_level = 7;
8849 
8850 	if (tpacpi_is_ibm()) {
8851 		TPACPI_ACPIHANDLE_INIT(fans);
8852 		TPACPI_ACPIHANDLE_INIT(gfan);
8853 		TPACPI_ACPIHANDLE_INIT(sfan);
8854 	}
8855 
8856 	quirks = tpacpi_check_quirks(fan_quirk_table,
8857 				     ARRAY_SIZE(fan_quirk_table));
8858 
8859 	if (quirks & TPACPI_FAN_NOFAN) {
8860 		pr_info("No integrated ThinkPad fan available\n");
8861 		return -ENODEV;
8862 	}
8863 
8864 	if (gfan_handle) {
8865 		/* 570, 600e/x, 770e, 770x */
8866 		fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
8867 	} else {
8868 		/* all other ThinkPads: note that even old-style
8869 		 * ThinkPad ECs supports the fan control register */
8870 		if (likely(acpi_ec_read(fan_status_offset,
8871 					&fan_control_initial_status))) {
8872 			int res;
8873 			unsigned int speed;
8874 
8875 			fan_status_access_mode = TPACPI_FAN_RD_TPEC;
8876 			if (quirks & TPACPI_FAN_Q1)
8877 				fan_quirk1_setup();
8878 			/* Try and probe the 2nd fan */
8879 			tp_features.second_fan = 1; /* needed for get_speed to work */
8880 			res = fan2_get_speed(&speed);
8881 			if (res >= 0 && speed != FAN_NOT_PRESENT) {
8882 				/* It responded - so let's assume it's there */
8883 				tp_features.second_fan = 1;
8884 				tp_features.second_fan_ctl = 1;
8885 				pr_info("secondary fan control detected & enabled\n");
8886 			} else {
8887 				/* Fan not auto-detected */
8888 				tp_features.second_fan = 0;
8889 				if (quirks & TPACPI_FAN_2FAN) {
8890 					tp_features.second_fan = 1;
8891 					pr_info("secondary fan support enabled\n");
8892 				}
8893 				if (quirks & TPACPI_FAN_2CTL) {
8894 					tp_features.second_fan = 1;
8895 					tp_features.second_fan_ctl = 1;
8896 					pr_info("secondary fan control enabled\n");
8897 				}
8898 			}
8899 		} else {
8900 			pr_err("ThinkPad ACPI EC access misbehaving, fan status and control unavailable\n");
8901 			return -ENODEV;
8902 		}
8903 	}
8904 
8905 	if (sfan_handle) {
8906 		/* 570, 770x-JL */
8907 		fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
8908 		fan_control_commands |=
8909 		    TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
8910 	} else {
8911 		if (!gfan_handle) {
8912 			/* gfan without sfan means no fan control */
8913 			/* all other models implement TP EC 0x2f control */
8914 
8915 			if (fans_handle) {
8916 				/* X31, X40, X41 */
8917 				fan_control_access_mode =
8918 				    TPACPI_FAN_WR_ACPI_FANS;
8919 				fan_control_commands |=
8920 				    TPACPI_FAN_CMD_SPEED |
8921 				    TPACPI_FAN_CMD_LEVEL |
8922 				    TPACPI_FAN_CMD_ENABLE;
8923 			} else {
8924 				fan_control_access_mode = TPACPI_FAN_WR_TPEC;
8925 				fan_control_commands |=
8926 				    TPACPI_FAN_CMD_LEVEL |
8927 				    TPACPI_FAN_CMD_ENABLE;
8928 			}
8929 		}
8930 	}
8931 
8932 	vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
8933 		"fan is %s, modes %d, %d\n",
8934 		str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
8935 		  fan_control_access_mode != TPACPI_FAN_WR_NONE),
8936 		fan_status_access_mode, fan_control_access_mode);
8937 
8938 	/* fan control master switch */
8939 	if (!fan_control_allowed) {
8940 		fan_control_access_mode = TPACPI_FAN_WR_NONE;
8941 		fan_control_commands = 0;
8942 		dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
8943 			   "fan control features disabled by parameter\n");
8944 	}
8945 
8946 	/* update fan_control_desired_level */
8947 	if (fan_status_access_mode != TPACPI_FAN_NONE)
8948 		fan_get_status_safe(NULL);
8949 
8950 	if (fan_status_access_mode == TPACPI_FAN_NONE &&
8951 	    fan_control_access_mode == TPACPI_FAN_WR_NONE)
8952 		return -ENODEV;
8953 
8954 	return 0;
8955 }
8956 
8957 static void fan_exit(void)
8958 {
8959 	vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_FAN,
8960 		    "cancelling any pending fan watchdog tasks\n");
8961 
8962 	cancel_delayed_work(&fan_watchdog_task);
8963 	flush_workqueue(tpacpi_wq);
8964 }
8965 
8966 static void fan_suspend(void)
8967 {
8968 	int rc;
8969 
8970 	if (!fan_control_allowed)
8971 		return;
8972 
8973 	/* Store fan status in cache */
8974 	fan_control_resume_level = 0;
8975 	rc = fan_get_status_safe(&fan_control_resume_level);
8976 	if (rc)
8977 		pr_notice("failed to read fan level for later restore during resume: %d\n",
8978 			  rc);
8979 
8980 	/* if it is undefined, don't attempt to restore it.
8981 	 * KEEP THIS LAST */
8982 	if (tp_features.fan_ctrl_status_undef)
8983 		fan_control_resume_level = 0;
8984 }
8985 
8986 static void fan_resume(void)
8987 {
8988 	u8 current_level = 7;
8989 	bool do_set = false;
8990 	int rc;
8991 
8992 	/* DSDT *always* updates status on resume */
8993 	tp_features.fan_ctrl_status_undef = 0;
8994 
8995 	if (!fan_control_allowed ||
8996 	    !fan_control_resume_level ||
8997 	    fan_get_status_safe(&current_level))
8998 		return;
8999 
9000 	switch (fan_control_access_mode) {
9001 	case TPACPI_FAN_WR_ACPI_SFAN:
9002 		/* never decrease fan level */
9003 		do_set = (fan_control_resume_level > current_level);
9004 		break;
9005 	case TPACPI_FAN_WR_ACPI_FANS:
9006 	case TPACPI_FAN_WR_TPEC:
9007 		/* never decrease fan level, scale is:
9008 		 * TP_EC_FAN_FULLSPEED > 7 >= TP_EC_FAN_AUTO
9009 		 *
9010 		 * We expect the firmware to set either 7 or AUTO, but we
9011 		 * handle FULLSPEED out of paranoia.
9012 		 *
9013 		 * So, we can safely only restore FULLSPEED or 7, anything
9014 		 * else could slow the fan.  Restoring AUTO is useless, at
9015 		 * best that's exactly what the DSDT already set (it is the
9016 		 * slower it uses).
9017 		 *
9018 		 * Always keep in mind that the DSDT *will* have set the
9019 		 * fans to what the vendor supposes is the best level.  We
9020 		 * muck with it only to speed the fan up.
9021 		 */
9022 		if (fan_control_resume_level != 7 &&
9023 		    !(fan_control_resume_level & TP_EC_FAN_FULLSPEED))
9024 			return;
9025 		else
9026 			do_set = !(current_level & TP_EC_FAN_FULLSPEED) &&
9027 				 (current_level != fan_control_resume_level);
9028 		break;
9029 	default:
9030 		return;
9031 	}
9032 	if (do_set) {
9033 		pr_notice("restoring fan level to 0x%02x\n",
9034 			  fan_control_resume_level);
9035 		rc = fan_set_level_safe(fan_control_resume_level);
9036 		if (rc < 0)
9037 			pr_notice("failed to restore fan level: %d\n", rc);
9038 	}
9039 }
9040 
9041 static int fan_read(struct seq_file *m)
9042 {
9043 	int rc;
9044 	u8 status;
9045 	unsigned int speed = 0;
9046 
9047 	switch (fan_status_access_mode) {
9048 	case TPACPI_FAN_RD_ACPI_GFAN:
9049 		/* 570, 600e/x, 770e, 770x */
9050 		rc = fan_get_status_safe(&status);
9051 		if (rc)
9052 			return rc;
9053 
9054 		seq_printf(m, "status:\t\t%s\n"
9055 			       "level:\t\t%d\n",
9056 			       str_enabled_disabled(status), status);
9057 		break;
9058 
9059 	case TPACPI_FAN_RD_TPEC:
9060 		/* all except 570, 600e/x, 770e, 770x */
9061 		rc = fan_get_status_safe(&status);
9062 		if (rc)
9063 			return rc;
9064 
9065 		seq_printf(m, "status:\t\t%s\n", str_enabled_disabled(status));
9066 
9067 		rc = fan_get_speed(&speed);
9068 		if (rc < 0)
9069 			return rc;
9070 
9071 		seq_printf(m, "speed:\t\t%d\n", speed);
9072 
9073 		if (status & TP_EC_FAN_FULLSPEED)
9074 			/* Disengaged mode takes precedence */
9075 			seq_printf(m, "level:\t\tdisengaged\n");
9076 		else if (status & TP_EC_FAN_AUTO)
9077 			seq_printf(m, "level:\t\tauto\n");
9078 		else
9079 			seq_printf(m, "level:\t\t%d\n", status);
9080 		break;
9081 
9082 	case TPACPI_FAN_NONE:
9083 	default:
9084 		seq_printf(m, "status:\t\tnot supported\n");
9085 	}
9086 
9087 	if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
9088 		seq_printf(m, "commands:\tlevel <level>");
9089 
9090 		switch (fan_control_access_mode) {
9091 		case TPACPI_FAN_WR_ACPI_SFAN:
9092 			seq_printf(m, " (<level> is 0-7)\n");
9093 			break;
9094 
9095 		default:
9096 			seq_printf(m, " (<level> is 0-7, auto, disengaged, full-speed)\n");
9097 			break;
9098 		}
9099 	}
9100 
9101 	if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
9102 		seq_printf(m, "commands:\tenable, disable\n"
9103 			       "commands:\twatchdog <timeout> (<timeout> is 0 (off), 1-120 (seconds))\n");
9104 
9105 	if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
9106 		seq_printf(m, "commands:\tspeed <speed> (<speed> is 0-65535)\n");
9107 
9108 	return 0;
9109 }
9110 
9111 static int fan_write_cmd_level(const char *cmd, int *rc)
9112 {
9113 	int level;
9114 
9115 	if (strlencmp(cmd, "level auto") == 0)
9116 		level = TP_EC_FAN_AUTO;
9117 	else if ((strlencmp(cmd, "level disengaged") == 0) ||
9118 			(strlencmp(cmd, "level full-speed") == 0))
9119 		level = TP_EC_FAN_FULLSPEED;
9120 	else if (sscanf(cmd, "level %d", &level) != 1)
9121 		return 0;
9122 
9123 	*rc = fan_set_level_safe(level);
9124 	if (*rc == -ENXIO)
9125 		pr_err("level command accepted for unsupported access mode %d\n",
9126 		       fan_control_access_mode);
9127 	else if (!*rc)
9128 		tpacpi_disclose_usertask("procfs fan",
9129 			"set level to %d\n", level);
9130 
9131 	return 1;
9132 }
9133 
9134 static int fan_write_cmd_enable(const char *cmd, int *rc)
9135 {
9136 	if (strlencmp(cmd, "enable") != 0)
9137 		return 0;
9138 
9139 	*rc = fan_set_enable();
9140 	if (*rc == -ENXIO)
9141 		pr_err("enable command accepted for unsupported access mode %d\n",
9142 		       fan_control_access_mode);
9143 	else if (!*rc)
9144 		tpacpi_disclose_usertask("procfs fan", "enable\n");
9145 
9146 	return 1;
9147 }
9148 
9149 static int fan_write_cmd_disable(const char *cmd, int *rc)
9150 {
9151 	if (strlencmp(cmd, "disable") != 0)
9152 		return 0;
9153 
9154 	*rc = fan_set_disable();
9155 	if (*rc == -ENXIO)
9156 		pr_err("disable command accepted for unsupported access mode %d\n",
9157 		       fan_control_access_mode);
9158 	else if (!*rc)
9159 		tpacpi_disclose_usertask("procfs fan", "disable\n");
9160 
9161 	return 1;
9162 }
9163 
9164 static int fan_write_cmd_speed(const char *cmd, int *rc)
9165 {
9166 	int speed;
9167 
9168 	/* TODO:
9169 	 * Support speed <low> <medium> <high> ? */
9170 
9171 	if (sscanf(cmd, "speed %d", &speed) != 1)
9172 		return 0;
9173 
9174 	*rc = fan_set_speed(speed);
9175 	if (*rc == -ENXIO)
9176 		pr_err("speed command accepted for unsupported access mode %d\n",
9177 		       fan_control_access_mode);
9178 	else if (!*rc)
9179 		tpacpi_disclose_usertask("procfs fan",
9180 			"set speed to %d\n", speed);
9181 
9182 	return 1;
9183 }
9184 
9185 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
9186 {
9187 	int interval;
9188 
9189 	if (sscanf(cmd, "watchdog %d", &interval) != 1)
9190 		return 0;
9191 
9192 	if (interval < 0 || interval > 120)
9193 		*rc = -EINVAL;
9194 	else {
9195 		fan_watchdog_maxinterval = interval;
9196 		tpacpi_disclose_usertask("procfs fan",
9197 			"set watchdog timer to %d\n",
9198 			interval);
9199 	}
9200 
9201 	return 1;
9202 }
9203 
9204 static int fan_write(char *buf)
9205 {
9206 	char *cmd;
9207 	int rc = 0;
9208 
9209 	while (!rc && (cmd = strsep(&buf, ","))) {
9210 		if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
9211 		      fan_write_cmd_level(cmd, &rc)) &&
9212 		    !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
9213 		      (fan_write_cmd_enable(cmd, &rc) ||
9214 		       fan_write_cmd_disable(cmd, &rc) ||
9215 		       fan_write_cmd_watchdog(cmd, &rc))) &&
9216 		    !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
9217 		      fan_write_cmd_speed(cmd, &rc))
9218 		    )
9219 			rc = -EINVAL;
9220 		else if (!rc)
9221 			fan_watchdog_reset();
9222 	}
9223 
9224 	return rc;
9225 }
9226 
9227 static struct ibm_struct fan_driver_data = {
9228 	.name = "fan",
9229 	.read = fan_read,
9230 	.write = fan_write,
9231 	.exit = fan_exit,
9232 	.suspend = fan_suspend,
9233 	.resume = fan_resume,
9234 };
9235 
9236 /*************************************************************************
9237  * Mute LED subdriver
9238  */
9239 
9240 #define TPACPI_LED_MAX		2
9241 
9242 struct tp_led_table {
9243 	acpi_string name;
9244 	int on_value;
9245 	int off_value;
9246 	int state;
9247 };
9248 
9249 static struct tp_led_table led_tables[TPACPI_LED_MAX] = {
9250 	[LED_AUDIO_MUTE] = {
9251 		.name = "SSMS",
9252 		.on_value = 1,
9253 		.off_value = 0,
9254 	},
9255 	[LED_AUDIO_MICMUTE] = {
9256 		.name = "MMTS",
9257 		.on_value = 2,
9258 		.off_value = 0,
9259 	},
9260 };
9261 
9262 static int mute_led_on_off(struct tp_led_table *t, bool state)
9263 {
9264 	acpi_handle temp;
9265 	int output;
9266 
9267 	if (ACPI_FAILURE(acpi_get_handle(hkey_handle, t->name, &temp))) {
9268 		pr_warn("Thinkpad ACPI has no %s interface.\n", t->name);
9269 		return -EIO;
9270 	}
9271 
9272 	if (!acpi_evalf(hkey_handle, &output, t->name, "dd",
9273 			state ? t->on_value : t->off_value))
9274 		return -EIO;
9275 
9276 	t->state = state;
9277 	return state;
9278 }
9279 
9280 static int tpacpi_led_set(int whichled, bool on)
9281 {
9282 	struct tp_led_table *t;
9283 
9284 	t = &led_tables[whichled];
9285 	if (t->state < 0 || t->state == on)
9286 		return t->state;
9287 	return mute_led_on_off(t, on);
9288 }
9289 
9290 static int tpacpi_led_mute_set(struct led_classdev *led_cdev,
9291 			       enum led_brightness brightness)
9292 {
9293 	return tpacpi_led_set(LED_AUDIO_MUTE, brightness != LED_OFF);
9294 }
9295 
9296 static int tpacpi_led_micmute_set(struct led_classdev *led_cdev,
9297 				  enum led_brightness brightness)
9298 {
9299 	return tpacpi_led_set(LED_AUDIO_MICMUTE, brightness != LED_OFF);
9300 }
9301 
9302 static struct led_classdev mute_led_cdev[TPACPI_LED_MAX] = {
9303 	[LED_AUDIO_MUTE] = {
9304 		.name		= "platform::mute",
9305 		.max_brightness = 1,
9306 		.brightness_set_blocking = tpacpi_led_mute_set,
9307 		.default_trigger = "audio-mute",
9308 	},
9309 	[LED_AUDIO_MICMUTE] = {
9310 		.name		= "platform::micmute",
9311 		.max_brightness = 1,
9312 		.brightness_set_blocking = tpacpi_led_micmute_set,
9313 		.default_trigger = "audio-micmute",
9314 	},
9315 };
9316 
9317 static int mute_led_init(struct ibm_init_struct *iibm)
9318 {
9319 	acpi_handle temp;
9320 	int i, err;
9321 
9322 	for (i = 0; i < TPACPI_LED_MAX; i++) {
9323 		struct tp_led_table *t = &led_tables[i];
9324 		if (ACPI_FAILURE(acpi_get_handle(hkey_handle, t->name, &temp))) {
9325 			t->state = -ENODEV;
9326 			continue;
9327 		}
9328 
9329 		mute_led_cdev[i].brightness = ledtrig_audio_get(i);
9330 		err = led_classdev_register(&tpacpi_pdev->dev, &mute_led_cdev[i]);
9331 		if (err < 0) {
9332 			while (i--)
9333 				led_classdev_unregister(&mute_led_cdev[i]);
9334 			return err;
9335 		}
9336 	}
9337 	return 0;
9338 }
9339 
9340 static void mute_led_exit(void)
9341 {
9342 	int i;
9343 
9344 	for (i = 0; i < TPACPI_LED_MAX; i++) {
9345 		led_classdev_unregister(&mute_led_cdev[i]);
9346 		tpacpi_led_set(i, false);
9347 	}
9348 }
9349 
9350 static void mute_led_resume(void)
9351 {
9352 	int i;
9353 
9354 	for (i = 0; i < TPACPI_LED_MAX; i++) {
9355 		struct tp_led_table *t = &led_tables[i];
9356 		if (t->state >= 0)
9357 			mute_led_on_off(t, t->state);
9358 	}
9359 }
9360 
9361 static struct ibm_struct mute_led_driver_data = {
9362 	.name = "mute_led",
9363 	.exit = mute_led_exit,
9364 	.resume = mute_led_resume,
9365 };
9366 
9367 /*
9368  * Battery Wear Control Driver
9369  * Contact: Ognjen Galic <smclt30p@gmail.com>
9370  */
9371 
9372 /* Metadata */
9373 
9374 #define GET_START	"BCTG"
9375 #define SET_START	"BCCS"
9376 #define GET_STOP	"BCSG"
9377 #define SET_STOP	"BCSS"
9378 #define GET_DISCHARGE	"BDSG"
9379 #define SET_DISCHARGE	"BDSS"
9380 #define GET_INHIBIT	"BICG"
9381 #define SET_INHIBIT	"BICS"
9382 
9383 enum {
9384 	BAT_ANY = 0,
9385 	BAT_PRIMARY = 1,
9386 	BAT_SECONDARY = 2
9387 };
9388 
9389 enum {
9390 	/* Error condition bit */
9391 	METHOD_ERR = BIT(31),
9392 };
9393 
9394 enum {
9395 	/* This is used in the get/set helpers */
9396 	THRESHOLD_START,
9397 	THRESHOLD_STOP,
9398 	FORCE_DISCHARGE,
9399 	INHIBIT_CHARGE,
9400 };
9401 
9402 struct tpacpi_battery_data {
9403 	int charge_start;
9404 	int start_support;
9405 	int charge_stop;
9406 	int stop_support;
9407 	unsigned int charge_behaviours;
9408 };
9409 
9410 struct tpacpi_battery_driver_data {
9411 	struct tpacpi_battery_data batteries[3];
9412 	int individual_addressing;
9413 };
9414 
9415 static struct tpacpi_battery_driver_data battery_info;
9416 
9417 /* ACPI helpers/functions/probes */
9418 
9419 /**
9420  * This evaluates a ACPI method call specific to the battery
9421  * ACPI extension. The specifics are that an error is marked
9422  * in the 32rd bit of the response, so we just check that here.
9423  */
9424 static acpi_status tpacpi_battery_acpi_eval(char *method, int *ret, int param)
9425 {
9426 	int response;
9427 
9428 	if (!acpi_evalf(hkey_handle, &response, method, "dd", param)) {
9429 		acpi_handle_err(hkey_handle, "%s: evaluate failed", method);
9430 		return AE_ERROR;
9431 	}
9432 	if (response & METHOD_ERR) {
9433 		acpi_handle_err(hkey_handle,
9434 				"%s evaluated but flagged as error", method);
9435 		return AE_ERROR;
9436 	}
9437 	*ret = response;
9438 	return AE_OK;
9439 }
9440 
9441 static int tpacpi_battery_get(int what, int battery, int *ret)
9442 {
9443 	switch (what) {
9444 	case THRESHOLD_START:
9445 		if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_START, ret, battery))
9446 			return -ENODEV;
9447 
9448 		/* The value is in the low 8 bits of the response */
9449 		*ret = *ret & 0xFF;
9450 		return 0;
9451 	case THRESHOLD_STOP:
9452 		if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_STOP, ret, battery))
9453 			return -ENODEV;
9454 		/* Value is in lower 8 bits */
9455 		*ret = *ret & 0xFF;
9456 		/*
9457 		 * On the stop value, if we return 0 that
9458 		 * does not make any sense. 0 means Default, which
9459 		 * means that charging stops at 100%, so we return
9460 		 * that.
9461 		 */
9462 		if (*ret == 0)
9463 			*ret = 100;
9464 		return 0;
9465 	case FORCE_DISCHARGE:
9466 		if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_DISCHARGE, ret, battery))
9467 			return -ENODEV;
9468 		/* The force discharge status is in bit 0 */
9469 		*ret = *ret & 0x01;
9470 		return 0;
9471 	case INHIBIT_CHARGE:
9472 		if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_INHIBIT, ret, battery))
9473 			return -ENODEV;
9474 		/* The inhibit charge status is in bit 0 */
9475 		*ret = *ret & 0x01;
9476 		return 0;
9477 	default:
9478 		pr_crit("wrong parameter: %d", what);
9479 		return -EINVAL;
9480 	}
9481 }
9482 
9483 static int tpacpi_battery_set(int what, int battery, int value)
9484 {
9485 	int param, ret;
9486 	/* The first 8 bits are the value of the threshold */
9487 	param = value;
9488 	/* The battery ID is in bits 8-9, 2 bits */
9489 	param |= battery << 8;
9490 
9491 	switch (what) {
9492 	case THRESHOLD_START:
9493 		if ACPI_FAILURE(tpacpi_battery_acpi_eval(SET_START, &ret, param)) {
9494 			pr_err("failed to set charge threshold on battery %d",
9495 					battery);
9496 			return -ENODEV;
9497 		}
9498 		return 0;
9499 	case THRESHOLD_STOP:
9500 		if ACPI_FAILURE(tpacpi_battery_acpi_eval(SET_STOP, &ret, param)) {
9501 			pr_err("failed to set stop threshold: %d", battery);
9502 			return -ENODEV;
9503 		}
9504 		return 0;
9505 	case FORCE_DISCHARGE:
9506 		/* Force discharge is in bit 0,
9507 		 * break on AC attach is in bit 1 (won't work on some ThinkPads),
9508 		 * battery ID is in bits 8-9, 2 bits.
9509 		 */
9510 		if (ACPI_FAILURE(tpacpi_battery_acpi_eval(SET_DISCHARGE, &ret, param))) {
9511 			pr_err("failed to set force discharge on %d", battery);
9512 			return -ENODEV;
9513 		}
9514 		return 0;
9515 	case INHIBIT_CHARGE:
9516 		/* When setting inhibit charge, we set a default value of
9517 		 * always breaking on AC detach and the effective time is set to
9518 		 * be permanent.
9519 		 * The battery ID is in bits 4-5, 2 bits,
9520 		 * the effective time is in bits 8-23, 2 bytes.
9521 		 * A time of FFFF indicates forever.
9522 		 */
9523 		param = value;
9524 		param |= battery << 4;
9525 		param |= 0xFFFF << 8;
9526 		if (ACPI_FAILURE(tpacpi_battery_acpi_eval(SET_INHIBIT, &ret, param))) {
9527 			pr_err("failed to set inhibit charge on %d", battery);
9528 			return -ENODEV;
9529 		}
9530 		return 0;
9531 	default:
9532 		pr_crit("wrong parameter: %d", what);
9533 		return -EINVAL;
9534 	}
9535 }
9536 
9537 static int tpacpi_battery_set_validate(int what, int battery, int value)
9538 {
9539 	int ret, v;
9540 
9541 	ret = tpacpi_battery_set(what, battery, value);
9542 	if (ret < 0)
9543 		return ret;
9544 
9545 	ret = tpacpi_battery_get(what, battery, &v);
9546 	if (ret < 0)
9547 		return ret;
9548 
9549 	if (v == value)
9550 		return 0;
9551 
9552 	msleep(500);
9553 
9554 	ret = tpacpi_battery_get(what, battery, &v);
9555 	if (ret < 0)
9556 		return ret;
9557 
9558 	if (v == value)
9559 		return 0;
9560 
9561 	return -EIO;
9562 }
9563 
9564 static int tpacpi_battery_probe(int battery)
9565 {
9566 	int ret = 0;
9567 
9568 	memset(&battery_info.batteries[battery], 0,
9569 		sizeof(battery_info.batteries[battery]));
9570 
9571 	/*
9572 	 * 1) Get the current start threshold
9573 	 * 2) Check for support
9574 	 * 3) Get the current stop threshold
9575 	 * 4) Check for support
9576 	 * 5) Get the current force discharge status
9577 	 * 6) Check for support
9578 	 * 7) Get the current inhibit charge status
9579 	 * 8) Check for support
9580 	 */
9581 	if (acpi_has_method(hkey_handle, GET_START)) {
9582 		if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_START, &ret, battery)) {
9583 			pr_err("Error probing battery %d\n", battery);
9584 			return -ENODEV;
9585 		}
9586 		/* Individual addressing is in bit 9 */
9587 		if (ret & BIT(9))
9588 			battery_info.individual_addressing = true;
9589 		/* Support is marked in bit 8 */
9590 		if (ret & BIT(8))
9591 			battery_info.batteries[battery].start_support = 1;
9592 		else
9593 			return -ENODEV;
9594 		if (tpacpi_battery_get(THRESHOLD_START, battery,
9595 			&battery_info.batteries[battery].charge_start)) {
9596 			pr_err("Error probing battery %d\n", battery);
9597 			return -ENODEV;
9598 		}
9599 	}
9600 	if (acpi_has_method(hkey_handle, GET_STOP)) {
9601 		if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_STOP, &ret, battery)) {
9602 			pr_err("Error probing battery stop; %d\n", battery);
9603 			return -ENODEV;
9604 		}
9605 		/* Support is marked in bit 8 */
9606 		if (ret & BIT(8))
9607 			battery_info.batteries[battery].stop_support = 1;
9608 		else
9609 			return -ENODEV;
9610 		if (tpacpi_battery_get(THRESHOLD_STOP, battery,
9611 			&battery_info.batteries[battery].charge_stop)) {
9612 			pr_err("Error probing battery stop: %d\n", battery);
9613 			return -ENODEV;
9614 		}
9615 	}
9616 	if (acpi_has_method(hkey_handle, GET_DISCHARGE)) {
9617 		if (ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_DISCHARGE, &ret, battery))) {
9618 			pr_err("Error probing battery discharge; %d\n", battery);
9619 			return -ENODEV;
9620 		}
9621 		/* Support is marked in bit 8 */
9622 		if (ret & BIT(8))
9623 			battery_info.batteries[battery].charge_behaviours |=
9624 				BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_FORCE_DISCHARGE);
9625 	}
9626 	if (acpi_has_method(hkey_handle, GET_INHIBIT)) {
9627 		if (ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_INHIBIT, &ret, battery))) {
9628 			pr_err("Error probing battery inhibit charge; %d\n", battery);
9629 			return -ENODEV;
9630 		}
9631 		/* Support is marked in bit 5 */
9632 		if (ret & BIT(5))
9633 			battery_info.batteries[battery].charge_behaviours |=
9634 				BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_INHIBIT_CHARGE);
9635 	}
9636 
9637 	battery_info.batteries[battery].charge_behaviours |=
9638 		BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_AUTO);
9639 
9640 	pr_info("battery %d registered (start %d, stop %d, behaviours: 0x%x)\n",
9641 		battery,
9642 		battery_info.batteries[battery].charge_start,
9643 		battery_info.batteries[battery].charge_stop,
9644 		battery_info.batteries[battery].charge_behaviours);
9645 
9646 	return 0;
9647 }
9648 
9649 /* General helper functions */
9650 
9651 static int tpacpi_battery_get_id(const char *battery_name)
9652 {
9653 
9654 	if (strcmp(battery_name, "BAT0") == 0 ||
9655 	    tp_features.battery_force_primary)
9656 		return BAT_PRIMARY;
9657 	if (strcmp(battery_name, "BAT1") == 0)
9658 		return BAT_SECONDARY;
9659 	/*
9660 	 * If for some reason the battery is not BAT0 nor is it
9661 	 * BAT1, we will assume it's the default, first battery,
9662 	 * AKA primary.
9663 	 */
9664 	pr_warn("unknown battery %s, assuming primary", battery_name);
9665 	return BAT_PRIMARY;
9666 }
9667 
9668 /* sysfs interface */
9669 
9670 static ssize_t tpacpi_battery_store(int what,
9671 				    struct device *dev,
9672 				    const char *buf, size_t count)
9673 {
9674 	struct power_supply *supply = to_power_supply(dev);
9675 	unsigned long value;
9676 	int battery, rval;
9677 	/*
9678 	 * Some systems have support for more than
9679 	 * one battery. If that is the case,
9680 	 * tpacpi_battery_probe marked that addressing
9681 	 * them individually is supported, so we do that
9682 	 * based on the device struct.
9683 	 *
9684 	 * On systems that are not supported, we assume
9685 	 * the primary as most of the ACPI calls fail
9686 	 * with "Any Battery" as the parameter.
9687 	 */
9688 	if (battery_info.individual_addressing)
9689 		/* BAT_PRIMARY or BAT_SECONDARY */
9690 		battery = tpacpi_battery_get_id(supply->desc->name);
9691 	else
9692 		battery = BAT_PRIMARY;
9693 
9694 	rval = kstrtoul(buf, 10, &value);
9695 	if (rval)
9696 		return rval;
9697 
9698 	switch (what) {
9699 	case THRESHOLD_START:
9700 		if (!battery_info.batteries[battery].start_support)
9701 			return -ENODEV;
9702 		/* valid values are [0, 99] */
9703 		if (value > 99)
9704 			return -EINVAL;
9705 		if (value > battery_info.batteries[battery].charge_stop)
9706 			return -EINVAL;
9707 		if (tpacpi_battery_set(THRESHOLD_START, battery, value))
9708 			return -ENODEV;
9709 		battery_info.batteries[battery].charge_start = value;
9710 		return count;
9711 
9712 	case THRESHOLD_STOP:
9713 		if (!battery_info.batteries[battery].stop_support)
9714 			return -ENODEV;
9715 		/* valid values are [1, 100] */
9716 		if (value < 1 || value > 100)
9717 			return -EINVAL;
9718 		if (value < battery_info.batteries[battery].charge_start)
9719 			return -EINVAL;
9720 		battery_info.batteries[battery].charge_stop = value;
9721 		/*
9722 		 * When 100 is passed to stop, we need to flip
9723 		 * it to 0 as that the EC understands that as
9724 		 * "Default", which will charge to 100%
9725 		 */
9726 		if (value == 100)
9727 			value = 0;
9728 		if (tpacpi_battery_set(THRESHOLD_STOP, battery, value))
9729 			return -EINVAL;
9730 		return count;
9731 	default:
9732 		pr_crit("Wrong parameter: %d", what);
9733 		return -EINVAL;
9734 	}
9735 	return count;
9736 }
9737 
9738 static ssize_t tpacpi_battery_show(int what,
9739 				   struct device *dev,
9740 				   char *buf)
9741 {
9742 	struct power_supply *supply = to_power_supply(dev);
9743 	int ret, battery;
9744 	/*
9745 	 * Some systems have support for more than
9746 	 * one battery. If that is the case,
9747 	 * tpacpi_battery_probe marked that addressing
9748 	 * them individually is supported, so we;
9749 	 * based on the device struct.
9750 	 *
9751 	 * On systems that are not supported, we assume
9752 	 * the primary as most of the ACPI calls fail
9753 	 * with "Any Battery" as the parameter.
9754 	 */
9755 	if (battery_info.individual_addressing)
9756 		/* BAT_PRIMARY or BAT_SECONDARY */
9757 		battery = tpacpi_battery_get_id(supply->desc->name);
9758 	else
9759 		battery = BAT_PRIMARY;
9760 	if (tpacpi_battery_get(what, battery, &ret))
9761 		return -ENODEV;
9762 	return sprintf(buf, "%d\n", ret);
9763 }
9764 
9765 static ssize_t charge_control_start_threshold_show(struct device *device,
9766 				struct device_attribute *attr,
9767 				char *buf)
9768 {
9769 	return tpacpi_battery_show(THRESHOLD_START, device, buf);
9770 }
9771 
9772 static ssize_t charge_control_end_threshold_show(struct device *device,
9773 				struct device_attribute *attr,
9774 				char *buf)
9775 {
9776 	return tpacpi_battery_show(THRESHOLD_STOP, device, buf);
9777 }
9778 
9779 static ssize_t charge_behaviour_show(struct device *dev,
9780 				     struct device_attribute *attr,
9781 				     char *buf)
9782 {
9783 	enum power_supply_charge_behaviour active = POWER_SUPPLY_CHARGE_BEHAVIOUR_AUTO;
9784 	struct power_supply *supply = to_power_supply(dev);
9785 	unsigned int available;
9786 	int ret, battery;
9787 
9788 	battery = tpacpi_battery_get_id(supply->desc->name);
9789 	available = battery_info.batteries[battery].charge_behaviours;
9790 
9791 	if (available & BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_FORCE_DISCHARGE)) {
9792 		if (tpacpi_battery_get(FORCE_DISCHARGE, battery, &ret))
9793 			return -ENODEV;
9794 		if (ret) {
9795 			active = POWER_SUPPLY_CHARGE_BEHAVIOUR_FORCE_DISCHARGE;
9796 			goto out;
9797 		}
9798 	}
9799 
9800 	if (available & BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_INHIBIT_CHARGE)) {
9801 		if (tpacpi_battery_get(INHIBIT_CHARGE, battery, &ret))
9802 			return -ENODEV;
9803 		if (ret) {
9804 			active = POWER_SUPPLY_CHARGE_BEHAVIOUR_INHIBIT_CHARGE;
9805 			goto out;
9806 		}
9807 	}
9808 
9809 out:
9810 	return power_supply_charge_behaviour_show(dev, available, active, buf);
9811 }
9812 
9813 static ssize_t charge_control_start_threshold_store(struct device *dev,
9814 				struct device_attribute *attr,
9815 				const char *buf, size_t count)
9816 {
9817 	return tpacpi_battery_store(THRESHOLD_START, dev, buf, count);
9818 }
9819 
9820 static ssize_t charge_control_end_threshold_store(struct device *dev,
9821 				struct device_attribute *attr,
9822 				const char *buf, size_t count)
9823 {
9824 	return tpacpi_battery_store(THRESHOLD_STOP, dev, buf, count);
9825 }
9826 
9827 static ssize_t charge_behaviour_store(struct device *dev,
9828 				      struct device_attribute *attr,
9829 				      const char *buf, size_t count)
9830 {
9831 	struct power_supply *supply = to_power_supply(dev);
9832 	int selected, battery, ret = 0;
9833 	unsigned int available;
9834 
9835 	battery = tpacpi_battery_get_id(supply->desc->name);
9836 	available = battery_info.batteries[battery].charge_behaviours;
9837 	selected = power_supply_charge_behaviour_parse(available, buf);
9838 
9839 	if (selected < 0)
9840 		return selected;
9841 
9842 	switch (selected) {
9843 	case POWER_SUPPLY_CHARGE_BEHAVIOUR_AUTO:
9844 		if (available & BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_FORCE_DISCHARGE))
9845 			ret = tpacpi_battery_set_validate(FORCE_DISCHARGE, battery, 0);
9846 		if (available & BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_INHIBIT_CHARGE))
9847 			ret = min(ret, tpacpi_battery_set_validate(INHIBIT_CHARGE, battery, 0));
9848 		if (ret < 0)
9849 			return ret;
9850 		break;
9851 	case POWER_SUPPLY_CHARGE_BEHAVIOUR_FORCE_DISCHARGE:
9852 		if (available & BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_INHIBIT_CHARGE))
9853 			ret = tpacpi_battery_set_validate(INHIBIT_CHARGE, battery, 0);
9854 		ret = min(ret, tpacpi_battery_set_validate(FORCE_DISCHARGE, battery, 1));
9855 		if (ret < 0)
9856 			return ret;
9857 		break;
9858 	case POWER_SUPPLY_CHARGE_BEHAVIOUR_INHIBIT_CHARGE:
9859 		if (available & BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_FORCE_DISCHARGE))
9860 			ret = tpacpi_battery_set_validate(FORCE_DISCHARGE, battery, 0);
9861 		ret = min(ret, tpacpi_battery_set_validate(INHIBIT_CHARGE, battery, 1));
9862 		if (ret < 0)
9863 			return ret;
9864 		break;
9865 	default:
9866 		dev_err(dev, "Unexpected charge behaviour: %d\n", selected);
9867 		return -EINVAL;
9868 	}
9869 
9870 	return count;
9871 }
9872 
9873 static DEVICE_ATTR_RW(charge_control_start_threshold);
9874 static DEVICE_ATTR_RW(charge_control_end_threshold);
9875 static DEVICE_ATTR_RW(charge_behaviour);
9876 static struct device_attribute dev_attr_charge_start_threshold = __ATTR(
9877 	charge_start_threshold,
9878 	0644,
9879 	charge_control_start_threshold_show,
9880 	charge_control_start_threshold_store
9881 );
9882 static struct device_attribute dev_attr_charge_stop_threshold = __ATTR(
9883 	charge_stop_threshold,
9884 	0644,
9885 	charge_control_end_threshold_show,
9886 	charge_control_end_threshold_store
9887 );
9888 
9889 static struct attribute *tpacpi_battery_attrs[] = {
9890 	&dev_attr_charge_control_start_threshold.attr,
9891 	&dev_attr_charge_control_end_threshold.attr,
9892 	&dev_attr_charge_start_threshold.attr,
9893 	&dev_attr_charge_stop_threshold.attr,
9894 	&dev_attr_charge_behaviour.attr,
9895 	NULL,
9896 };
9897 
9898 ATTRIBUTE_GROUPS(tpacpi_battery);
9899 
9900 /* ACPI battery hooking */
9901 
9902 static int tpacpi_battery_add(struct power_supply *battery)
9903 {
9904 	int batteryid = tpacpi_battery_get_id(battery->desc->name);
9905 
9906 	if (tpacpi_battery_probe(batteryid))
9907 		return -ENODEV;
9908 	if (device_add_groups(&battery->dev, tpacpi_battery_groups))
9909 		return -ENODEV;
9910 	return 0;
9911 }
9912 
9913 static int tpacpi_battery_remove(struct power_supply *battery)
9914 {
9915 	device_remove_groups(&battery->dev, tpacpi_battery_groups);
9916 	return 0;
9917 }
9918 
9919 static struct acpi_battery_hook battery_hook = {
9920 	.add_battery = tpacpi_battery_add,
9921 	.remove_battery = tpacpi_battery_remove,
9922 	.name = "ThinkPad Battery Extension",
9923 };
9924 
9925 /* Subdriver init/exit */
9926 
9927 static const struct tpacpi_quirk battery_quirk_table[] __initconst = {
9928 	/*
9929 	 * Individual addressing is broken on models that expose the
9930 	 * primary battery as BAT1.
9931 	 */
9932 	TPACPI_Q_LNV('J', '7', true),       /* B5400 */
9933 	TPACPI_Q_LNV('J', 'I', true),       /* Thinkpad 11e */
9934 	TPACPI_Q_LNV3('R', '0', 'B', true), /* Thinkpad 11e gen 3 */
9935 	TPACPI_Q_LNV3('R', '0', 'C', true), /* Thinkpad 13 */
9936 	TPACPI_Q_LNV3('R', '0', 'J', true), /* Thinkpad 13 gen 2 */
9937 	TPACPI_Q_LNV3('R', '0', 'K', true), /* Thinkpad 11e gen 4 celeron BIOS */
9938 };
9939 
9940 static int __init tpacpi_battery_init(struct ibm_init_struct *ibm)
9941 {
9942 	memset(&battery_info, 0, sizeof(battery_info));
9943 
9944 	tp_features.battery_force_primary = tpacpi_check_quirks(
9945 					battery_quirk_table,
9946 					ARRAY_SIZE(battery_quirk_table));
9947 
9948 	battery_hook_register(&battery_hook);
9949 	return 0;
9950 }
9951 
9952 static void tpacpi_battery_exit(void)
9953 {
9954 	battery_hook_unregister(&battery_hook);
9955 }
9956 
9957 static struct ibm_struct battery_driver_data = {
9958 	.name = "battery",
9959 	.exit = tpacpi_battery_exit,
9960 };
9961 
9962 /*************************************************************************
9963  * LCD Shadow subdriver, for the Lenovo PrivacyGuard feature
9964  */
9965 
9966 static struct drm_privacy_screen *lcdshadow_dev;
9967 static acpi_handle lcdshadow_get_handle;
9968 static acpi_handle lcdshadow_set_handle;
9969 
9970 static int lcdshadow_set_sw_state(struct drm_privacy_screen *priv,
9971 				  enum drm_privacy_screen_status state)
9972 {
9973 	int output;
9974 
9975 	if (WARN_ON(!mutex_is_locked(&priv->lock)))
9976 		return -EIO;
9977 
9978 	if (!acpi_evalf(lcdshadow_set_handle, &output, NULL, "dd", (int)state))
9979 		return -EIO;
9980 
9981 	priv->hw_state = priv->sw_state = state;
9982 	return 0;
9983 }
9984 
9985 static void lcdshadow_get_hw_state(struct drm_privacy_screen *priv)
9986 {
9987 	int output;
9988 
9989 	if (!acpi_evalf(lcdshadow_get_handle, &output, NULL, "dd", 0))
9990 		return;
9991 
9992 	priv->hw_state = priv->sw_state = output & 0x1;
9993 }
9994 
9995 static const struct drm_privacy_screen_ops lcdshadow_ops = {
9996 	.set_sw_state = lcdshadow_set_sw_state,
9997 	.get_hw_state = lcdshadow_get_hw_state,
9998 };
9999 
10000 static int tpacpi_lcdshadow_init(struct ibm_init_struct *iibm)
10001 {
10002 	acpi_status status1, status2;
10003 	int output;
10004 
10005 	status1 = acpi_get_handle(hkey_handle, "GSSS", &lcdshadow_get_handle);
10006 	status2 = acpi_get_handle(hkey_handle, "SSSS", &lcdshadow_set_handle);
10007 	if (ACPI_FAILURE(status1) || ACPI_FAILURE(status2))
10008 		return 0;
10009 
10010 	if (!acpi_evalf(lcdshadow_get_handle, &output, NULL, "dd", 0))
10011 		return -EIO;
10012 
10013 	if (!(output & 0x10000))
10014 		return 0;
10015 
10016 	lcdshadow_dev = drm_privacy_screen_register(&tpacpi_pdev->dev,
10017 						    &lcdshadow_ops, NULL);
10018 	if (IS_ERR(lcdshadow_dev))
10019 		return PTR_ERR(lcdshadow_dev);
10020 
10021 	return 0;
10022 }
10023 
10024 static void lcdshadow_exit(void)
10025 {
10026 	drm_privacy_screen_unregister(lcdshadow_dev);
10027 }
10028 
10029 static void lcdshadow_resume(void)
10030 {
10031 	if (!lcdshadow_dev)
10032 		return;
10033 
10034 	mutex_lock(&lcdshadow_dev->lock);
10035 	lcdshadow_set_sw_state(lcdshadow_dev, lcdshadow_dev->sw_state);
10036 	mutex_unlock(&lcdshadow_dev->lock);
10037 }
10038 
10039 static int lcdshadow_read(struct seq_file *m)
10040 {
10041 	if (!lcdshadow_dev) {
10042 		seq_puts(m, "status:\t\tnot supported\n");
10043 	} else {
10044 		seq_printf(m, "status:\t\t%d\n", lcdshadow_dev->hw_state);
10045 		seq_puts(m, "commands:\t0, 1\n");
10046 	}
10047 
10048 	return 0;
10049 }
10050 
10051 static int lcdshadow_write(char *buf)
10052 {
10053 	char *cmd;
10054 	int res, state = -EINVAL;
10055 
10056 	if (!lcdshadow_dev)
10057 		return -ENODEV;
10058 
10059 	while ((cmd = strsep(&buf, ","))) {
10060 		res = kstrtoint(cmd, 10, &state);
10061 		if (res < 0)
10062 			return res;
10063 	}
10064 
10065 	if (state >= 2 || state < 0)
10066 		return -EINVAL;
10067 
10068 	mutex_lock(&lcdshadow_dev->lock);
10069 	res = lcdshadow_set_sw_state(lcdshadow_dev, state);
10070 	mutex_unlock(&lcdshadow_dev->lock);
10071 
10072 	drm_privacy_screen_call_notifier_chain(lcdshadow_dev);
10073 
10074 	return res;
10075 }
10076 
10077 static struct ibm_struct lcdshadow_driver_data = {
10078 	.name = "lcdshadow",
10079 	.exit = lcdshadow_exit,
10080 	.resume = lcdshadow_resume,
10081 	.read = lcdshadow_read,
10082 	.write = lcdshadow_write,
10083 };
10084 
10085 /*************************************************************************
10086  * Thinkpad sensor interfaces
10087  */
10088 
10089 #define DYTC_CMD_QUERY        0 /* To get DYTC status - enable/revision */
10090 #define DYTC_QUERY_ENABLE_BIT 8  /* Bit        8 - 0 = disabled, 1 = enabled */
10091 #define DYTC_QUERY_SUBREV_BIT 16 /* Bits 16 - 27 - sub revision */
10092 #define DYTC_QUERY_REV_BIT    28 /* Bits 28 - 31 - revision */
10093 
10094 #define DYTC_CMD_GET          2 /* To get current IC function and mode */
10095 #define DYTC_GET_LAPMODE_BIT 17 /* Set when in lapmode */
10096 
10097 #define PALMSENSOR_PRESENT_BIT 0 /* Determine if psensor present */
10098 #define PALMSENSOR_ON_BIT      1 /* psensor status */
10099 
10100 static bool has_palmsensor;
10101 static bool has_lapsensor;
10102 static bool palm_state;
10103 static bool lap_state;
10104 static int dytc_version;
10105 
10106 static int dytc_command(int command, int *output)
10107 {
10108 	acpi_handle dytc_handle;
10109 
10110 	if (ACPI_FAILURE(acpi_get_handle(hkey_handle, "DYTC", &dytc_handle))) {
10111 		/* Platform doesn't support DYTC */
10112 		return -ENODEV;
10113 	}
10114 	if (!acpi_evalf(dytc_handle, output, NULL, "dd", command))
10115 		return -EIO;
10116 	return 0;
10117 }
10118 
10119 static int lapsensor_get(bool *present, bool *state)
10120 {
10121 	int output, err;
10122 
10123 	*present = false;
10124 	err = dytc_command(DYTC_CMD_GET, &output);
10125 	if (err)
10126 		return err;
10127 
10128 	*present = true; /*If we get his far, we have lapmode support*/
10129 	*state = output & BIT(DYTC_GET_LAPMODE_BIT) ? true : false;
10130 	return 0;
10131 }
10132 
10133 static int palmsensor_get(bool *present, bool *state)
10134 {
10135 	acpi_handle psensor_handle;
10136 	int output;
10137 
10138 	*present = false;
10139 	if (ACPI_FAILURE(acpi_get_handle(hkey_handle, "GPSS", &psensor_handle)))
10140 		return -ENODEV;
10141 	if (!acpi_evalf(psensor_handle, &output, NULL, "d"))
10142 		return -EIO;
10143 
10144 	*present = output & BIT(PALMSENSOR_PRESENT_BIT) ? true : false;
10145 	*state = output & BIT(PALMSENSOR_ON_BIT) ? true : false;
10146 	return 0;
10147 }
10148 
10149 static void lapsensor_refresh(void)
10150 {
10151 	bool state;
10152 	int err;
10153 
10154 	if (has_lapsensor) {
10155 		err = lapsensor_get(&has_lapsensor, &state);
10156 		if (err)
10157 			return;
10158 		if (lap_state != state) {
10159 			lap_state = state;
10160 			sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, "dytc_lapmode");
10161 		}
10162 	}
10163 }
10164 
10165 static void palmsensor_refresh(void)
10166 {
10167 	bool state;
10168 	int err;
10169 
10170 	if (has_palmsensor) {
10171 		err = palmsensor_get(&has_palmsensor, &state);
10172 		if (err)
10173 			return;
10174 		if (palm_state != state) {
10175 			palm_state = state;
10176 			sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, "palmsensor");
10177 		}
10178 	}
10179 }
10180 
10181 static ssize_t dytc_lapmode_show(struct device *dev,
10182 					struct device_attribute *attr,
10183 					char *buf)
10184 {
10185 	if (has_lapsensor)
10186 		return sysfs_emit(buf, "%d\n", lap_state);
10187 	return sysfs_emit(buf, "\n");
10188 }
10189 static DEVICE_ATTR_RO(dytc_lapmode);
10190 
10191 static ssize_t palmsensor_show(struct device *dev,
10192 					struct device_attribute *attr,
10193 					char *buf)
10194 {
10195 	if (has_palmsensor)
10196 		return sysfs_emit(buf, "%d\n", palm_state);
10197 	return sysfs_emit(buf, "\n");
10198 }
10199 static DEVICE_ATTR_RO(palmsensor);
10200 
10201 static struct attribute *proxsensor_attributes[] = {
10202 	&dev_attr_dytc_lapmode.attr,
10203 	&dev_attr_palmsensor.attr,
10204 	NULL
10205 };
10206 
10207 static umode_t proxsensor_attr_is_visible(struct kobject *kobj,
10208 					  struct attribute *attr, int n)
10209 {
10210 	if (attr == &dev_attr_dytc_lapmode.attr) {
10211 		/*
10212 		 * Platforms before DYTC version 5 claim to have a lap sensor,
10213 		 * but it doesn't work, so we ignore them.
10214 		 */
10215 		if (!has_lapsensor || dytc_version < 5)
10216 			return 0;
10217 	} else if (attr == &dev_attr_palmsensor.attr) {
10218 		if (!has_palmsensor)
10219 			return 0;
10220 	}
10221 
10222 	return attr->mode;
10223 }
10224 
10225 static const struct attribute_group proxsensor_attr_group = {
10226 	.is_visible = proxsensor_attr_is_visible,
10227 	.attrs = proxsensor_attributes,
10228 };
10229 
10230 static int tpacpi_proxsensor_init(struct ibm_init_struct *iibm)
10231 {
10232 	int palm_err, lap_err;
10233 
10234 	palm_err = palmsensor_get(&has_palmsensor, &palm_state);
10235 	lap_err = lapsensor_get(&has_lapsensor, &lap_state);
10236 	/* If support isn't available for both devices return -ENODEV */
10237 	if ((palm_err == -ENODEV) && (lap_err == -ENODEV))
10238 		return -ENODEV;
10239 	/* Otherwise, if there was an error return it */
10240 	if (palm_err && (palm_err != -ENODEV))
10241 		return palm_err;
10242 	if (lap_err && (lap_err != -ENODEV))
10243 		return lap_err;
10244 
10245 	return 0;
10246 }
10247 
10248 static struct ibm_struct proxsensor_driver_data = {
10249 	.name = "proximity-sensor",
10250 };
10251 
10252 /*************************************************************************
10253  * DYTC Platform Profile interface
10254  */
10255 
10256 #define DYTC_CMD_SET          1 /* To enable/disable IC function mode */
10257 #define DYTC_CMD_MMC_GET      8 /* To get current MMC function and mode */
10258 #define DYTC_CMD_RESET    0x1ff /* To reset back to default */
10259 
10260 #define DYTC_CMD_FUNC_CAP     3 /* To get DYTC capabilities */
10261 #define DYTC_FC_MMC           27 /* MMC Mode supported */
10262 #define DYTC_FC_PSC           29 /* PSC Mode supported */
10263 #define DYTC_FC_AMT           31 /* AMT mode supported */
10264 
10265 #define DYTC_GET_FUNCTION_BIT 8  /* Bits  8-11 - function setting */
10266 #define DYTC_GET_MODE_BIT     12 /* Bits 12-15 - mode setting */
10267 
10268 #define DYTC_SET_FUNCTION_BIT 12 /* Bits 12-15 - function setting */
10269 #define DYTC_SET_MODE_BIT     16 /* Bits 16-19 - mode setting */
10270 #define DYTC_SET_VALID_BIT    20 /* Bit     20 - 1 = on, 0 = off */
10271 
10272 #define DYTC_FUNCTION_STD     0  /* Function = 0, standard mode */
10273 #define DYTC_FUNCTION_CQL     1  /* Function = 1, lap mode */
10274 #define DYTC_FUNCTION_MMC     11 /* Function = 11, MMC mode */
10275 #define DYTC_FUNCTION_PSC     13 /* Function = 13, PSC mode */
10276 #define DYTC_FUNCTION_AMT     15 /* Function = 15, AMT mode */
10277 
10278 #define DYTC_MODE_AMT_ENABLE   0x1 /* Enable AMT (in balanced mode) */
10279 #define DYTC_MODE_AMT_DISABLE  0xF /* Disable AMT (in other modes) */
10280 
10281 #define DYTC_MODE_MMC_PERFORM  2  /* High power mode aka performance */
10282 #define DYTC_MODE_MMC_LOWPOWER 3  /* Low power mode */
10283 #define DYTC_MODE_MMC_BALANCE  0xF  /* Default mode aka balanced */
10284 #define DYTC_MODE_MMC_DEFAULT  0  /* Default mode from MMC_GET, aka balanced */
10285 
10286 #define DYTC_MODE_PSC_LOWPOWER 3  /* Low power mode */
10287 #define DYTC_MODE_PSC_BALANCE  5  /* Default mode aka balanced */
10288 #define DYTC_MODE_PSC_PERFORM  7  /* High power mode aka performance */
10289 
10290 #define DYTC_ERR_MASK       0xF  /* Bits 0-3 in cmd result are the error result */
10291 #define DYTC_ERR_SUCCESS      1  /* CMD completed successful */
10292 
10293 #define DYTC_SET_COMMAND(function, mode, on) \
10294 	(DYTC_CMD_SET | (function) << DYTC_SET_FUNCTION_BIT | \
10295 	 (mode) << DYTC_SET_MODE_BIT | \
10296 	 (on) << DYTC_SET_VALID_BIT)
10297 
10298 #define DYTC_DISABLE_CQL DYTC_SET_COMMAND(DYTC_FUNCTION_CQL, DYTC_MODE_MMC_BALANCE, 0)
10299 #define DYTC_ENABLE_CQL DYTC_SET_COMMAND(DYTC_FUNCTION_CQL, DYTC_MODE_MMC_BALANCE, 1)
10300 static int dytc_control_amt(bool enable);
10301 static bool dytc_amt_active;
10302 
10303 static enum platform_profile_option dytc_current_profile;
10304 static atomic_t dytc_ignore_event = ATOMIC_INIT(0);
10305 static DEFINE_MUTEX(dytc_mutex);
10306 static int dytc_capabilities;
10307 static bool dytc_mmc_get_available;
10308 
10309 static int convert_dytc_to_profile(int dytcmode, enum platform_profile_option *profile)
10310 {
10311 	if (dytc_capabilities & BIT(DYTC_FC_MMC)) {
10312 		switch (dytcmode) {
10313 		case DYTC_MODE_MMC_LOWPOWER:
10314 			*profile = PLATFORM_PROFILE_LOW_POWER;
10315 			break;
10316 		case DYTC_MODE_MMC_DEFAULT:
10317 		case DYTC_MODE_MMC_BALANCE:
10318 			*profile =  PLATFORM_PROFILE_BALANCED;
10319 			break;
10320 		case DYTC_MODE_MMC_PERFORM:
10321 			*profile =  PLATFORM_PROFILE_PERFORMANCE;
10322 			break;
10323 		default: /* Unknown mode */
10324 			return -EINVAL;
10325 		}
10326 		return 0;
10327 	}
10328 	if (dytc_capabilities & BIT(DYTC_FC_PSC)) {
10329 		switch (dytcmode) {
10330 		case DYTC_MODE_PSC_LOWPOWER:
10331 			*profile = PLATFORM_PROFILE_LOW_POWER;
10332 			break;
10333 		case DYTC_MODE_PSC_BALANCE:
10334 			*profile =  PLATFORM_PROFILE_BALANCED;
10335 			break;
10336 		case DYTC_MODE_PSC_PERFORM:
10337 			*profile =  PLATFORM_PROFILE_PERFORMANCE;
10338 			break;
10339 		default: /* Unknown mode */
10340 			return -EINVAL;
10341 		}
10342 	}
10343 	return 0;
10344 }
10345 
10346 static int convert_profile_to_dytc(enum platform_profile_option profile, int *perfmode)
10347 {
10348 	switch (profile) {
10349 	case PLATFORM_PROFILE_LOW_POWER:
10350 		if (dytc_capabilities & BIT(DYTC_FC_MMC))
10351 			*perfmode = DYTC_MODE_MMC_LOWPOWER;
10352 		else if (dytc_capabilities & BIT(DYTC_FC_PSC))
10353 			*perfmode = DYTC_MODE_PSC_LOWPOWER;
10354 		break;
10355 	case PLATFORM_PROFILE_BALANCED:
10356 		if (dytc_capabilities & BIT(DYTC_FC_MMC))
10357 			*perfmode = DYTC_MODE_MMC_BALANCE;
10358 		else if (dytc_capabilities & BIT(DYTC_FC_PSC))
10359 			*perfmode = DYTC_MODE_PSC_BALANCE;
10360 		break;
10361 	case PLATFORM_PROFILE_PERFORMANCE:
10362 		if (dytc_capabilities & BIT(DYTC_FC_MMC))
10363 			*perfmode = DYTC_MODE_MMC_PERFORM;
10364 		else if (dytc_capabilities & BIT(DYTC_FC_PSC))
10365 			*perfmode = DYTC_MODE_PSC_PERFORM;
10366 		break;
10367 	default: /* Unknown profile */
10368 		return -EOPNOTSUPP;
10369 	}
10370 	return 0;
10371 }
10372 
10373 /*
10374  * dytc_profile_get: Function to register with platform_profile
10375  * handler. Returns current platform profile.
10376  */
10377 static int dytc_profile_get(struct platform_profile_handler *pprof,
10378 			    enum platform_profile_option *profile)
10379 {
10380 	*profile = dytc_current_profile;
10381 	return 0;
10382 }
10383 
10384 static int dytc_control_amt(bool enable)
10385 {
10386 	int dummy;
10387 	int err;
10388 	int cmd;
10389 
10390 	if (!(dytc_capabilities & BIT(DYTC_FC_AMT))) {
10391 		pr_warn("Attempting to toggle AMT on a system that doesn't advertise support\n");
10392 		return -ENODEV;
10393 	}
10394 
10395 	if (enable)
10396 		cmd = DYTC_SET_COMMAND(DYTC_FUNCTION_AMT, DYTC_MODE_AMT_ENABLE, enable);
10397 	else
10398 		cmd = DYTC_SET_COMMAND(DYTC_FUNCTION_AMT, DYTC_MODE_AMT_DISABLE, enable);
10399 
10400 	pr_debug("%sabling AMT (cmd 0x%x)", enable ? "en":"dis", cmd);
10401 	err = dytc_command(cmd, &dummy);
10402 	if (err)
10403 		return err;
10404 	dytc_amt_active = enable;
10405 	return 0;
10406 }
10407 
10408 /*
10409  * Helper function - check if we are in CQL mode and if we are
10410  *  -  disable CQL,
10411  *  - run the command
10412  *  - enable CQL
10413  *  If not in CQL mode, just run the command
10414  */
10415 static int dytc_cql_command(int command, int *output)
10416 {
10417 	int err, cmd_err, dummy;
10418 	int cur_funcmode;
10419 
10420 	/* Determine if we are in CQL mode. This alters the commands we do */
10421 	err = dytc_command(DYTC_CMD_GET, output);
10422 	if (err)
10423 		return err;
10424 
10425 	cur_funcmode = (*output >> DYTC_GET_FUNCTION_BIT) & 0xF;
10426 	/* Check if we're OK to return immediately */
10427 	if ((command == DYTC_CMD_GET) && (cur_funcmode != DYTC_FUNCTION_CQL))
10428 		return 0;
10429 
10430 	if (cur_funcmode == DYTC_FUNCTION_CQL) {
10431 		atomic_inc(&dytc_ignore_event);
10432 		err = dytc_command(DYTC_DISABLE_CQL, &dummy);
10433 		if (err)
10434 			return err;
10435 	}
10436 
10437 	cmd_err = dytc_command(command,	output);
10438 	/* Check return condition after we've restored CQL state */
10439 
10440 	if (cur_funcmode == DYTC_FUNCTION_CQL) {
10441 		err = dytc_command(DYTC_ENABLE_CQL, &dummy);
10442 		if (err)
10443 			return err;
10444 	}
10445 	return cmd_err;
10446 }
10447 
10448 /*
10449  * dytc_profile_set: Function to register with platform_profile
10450  * handler. Sets current platform profile.
10451  */
10452 static int dytc_profile_set(struct platform_profile_handler *pprof,
10453 			    enum platform_profile_option profile)
10454 {
10455 	int perfmode;
10456 	int output;
10457 	int err;
10458 
10459 	err = mutex_lock_interruptible(&dytc_mutex);
10460 	if (err)
10461 		return err;
10462 
10463 	err = convert_profile_to_dytc(profile, &perfmode);
10464 	if (err)
10465 		goto unlock;
10466 
10467 	if (dytc_capabilities & BIT(DYTC_FC_MMC)) {
10468 		if (profile == PLATFORM_PROFILE_BALANCED) {
10469 			/*
10470 			 * To get back to balanced mode we need to issue a reset command.
10471 			 * Note we still need to disable CQL mode before hand and re-enable
10472 			 * it afterwards, otherwise dytc_lapmode gets reset to 0 and stays
10473 			 * stuck at 0 for aprox. 30 minutes.
10474 			 */
10475 			err = dytc_cql_command(DYTC_CMD_RESET, &output);
10476 			if (err)
10477 				goto unlock;
10478 		} else {
10479 			/* Determine if we are in CQL mode. This alters the commands we do */
10480 			err = dytc_cql_command(DYTC_SET_COMMAND(DYTC_FUNCTION_MMC, perfmode, 1),
10481 						&output);
10482 			if (err)
10483 				goto unlock;
10484 		}
10485 	}
10486 	if (dytc_capabilities & BIT(DYTC_FC_PSC)) {
10487 		err = dytc_command(DYTC_SET_COMMAND(DYTC_FUNCTION_PSC, perfmode, 1), &output);
10488 		if (err)
10489 			goto unlock;
10490 		/* system supports AMT, activate it when on balanced */
10491 		if (dytc_capabilities & BIT(DYTC_FC_AMT))
10492 			dytc_control_amt(profile == PLATFORM_PROFILE_BALANCED);
10493 	}
10494 	/* Success - update current profile */
10495 	dytc_current_profile = profile;
10496 unlock:
10497 	mutex_unlock(&dytc_mutex);
10498 	return err;
10499 }
10500 
10501 static void dytc_profile_refresh(void)
10502 {
10503 	enum platform_profile_option profile;
10504 	int output, err = 0;
10505 	int perfmode;
10506 
10507 	mutex_lock(&dytc_mutex);
10508 	if (dytc_capabilities & BIT(DYTC_FC_MMC)) {
10509 		if (dytc_mmc_get_available)
10510 			err = dytc_command(DYTC_CMD_MMC_GET, &output);
10511 		else
10512 			err = dytc_cql_command(DYTC_CMD_GET, &output);
10513 	} else if (dytc_capabilities & BIT(DYTC_FC_PSC))
10514 		err = dytc_command(DYTC_CMD_GET, &output);
10515 
10516 	mutex_unlock(&dytc_mutex);
10517 	if (err)
10518 		return;
10519 
10520 	perfmode = (output >> DYTC_GET_MODE_BIT) & 0xF;
10521 	convert_dytc_to_profile(perfmode, &profile);
10522 	if (profile != dytc_current_profile) {
10523 		dytc_current_profile = profile;
10524 		platform_profile_notify();
10525 	}
10526 }
10527 
10528 static struct platform_profile_handler dytc_profile = {
10529 	.profile_get = dytc_profile_get,
10530 	.profile_set = dytc_profile_set,
10531 };
10532 
10533 static int tpacpi_dytc_profile_init(struct ibm_init_struct *iibm)
10534 {
10535 	int err, output;
10536 
10537 	/* Setup supported modes */
10538 	set_bit(PLATFORM_PROFILE_LOW_POWER, dytc_profile.choices);
10539 	set_bit(PLATFORM_PROFILE_BALANCED, dytc_profile.choices);
10540 	set_bit(PLATFORM_PROFILE_PERFORMANCE, dytc_profile.choices);
10541 
10542 	err = dytc_command(DYTC_CMD_QUERY, &output);
10543 	if (err)
10544 		return err;
10545 
10546 	if (output & BIT(DYTC_QUERY_ENABLE_BIT))
10547 		dytc_version = (output >> DYTC_QUERY_REV_BIT) & 0xF;
10548 
10549 	/* Check DYTC is enabled and supports mode setting */
10550 	if (dytc_version < 5)
10551 		return -ENODEV;
10552 
10553 	/* Check what capabilities are supported */
10554 	err = dytc_command(DYTC_CMD_FUNC_CAP, &dytc_capabilities);
10555 	if (err)
10556 		return err;
10557 
10558 	if (dytc_capabilities & BIT(DYTC_FC_MMC)) { /* MMC MODE */
10559 		pr_debug("MMC is supported\n");
10560 		/*
10561 		 * Check if MMC_GET functionality available
10562 		 * Version > 6 and return success from MMC_GET command
10563 		 */
10564 		dytc_mmc_get_available = false;
10565 		if (dytc_version >= 6) {
10566 			err = dytc_command(DYTC_CMD_MMC_GET, &output);
10567 			if (!err && ((output & DYTC_ERR_MASK) == DYTC_ERR_SUCCESS))
10568 				dytc_mmc_get_available = true;
10569 		}
10570 	} else if (dytc_capabilities & BIT(DYTC_FC_PSC)) { /* PSC MODE */
10571 		/* Support for this only works on AMD platforms */
10572 		if (boot_cpu_data.x86_vendor != X86_VENDOR_AMD) {
10573 			dbg_printk(TPACPI_DBG_INIT, "PSC not support on Intel platforms\n");
10574 			return -ENODEV;
10575 		}
10576 		pr_debug("PSC is supported\n");
10577 	} else {
10578 		dbg_printk(TPACPI_DBG_INIT, "No DYTC support available\n");
10579 		return -ENODEV;
10580 	}
10581 
10582 	dbg_printk(TPACPI_DBG_INIT,
10583 			"DYTC version %d: thermal mode available\n", dytc_version);
10584 
10585 	/* Create platform_profile structure and register */
10586 	err = platform_profile_register(&dytc_profile);
10587 	/*
10588 	 * If for some reason platform_profiles aren't enabled
10589 	 * don't quit terminally.
10590 	 */
10591 	if (err)
10592 		return -ENODEV;
10593 
10594 	/* Ensure initial values are correct */
10595 	dytc_profile_refresh();
10596 
10597 	/* Workaround for https://bugzilla.kernel.org/show_bug.cgi?id=216347 */
10598 	if (dytc_capabilities & BIT(DYTC_FC_PSC))
10599 		dytc_profile_set(NULL, PLATFORM_PROFILE_BALANCED);
10600 
10601 	return 0;
10602 }
10603 
10604 static void dytc_profile_exit(void)
10605 {
10606 	platform_profile_remove();
10607 }
10608 
10609 static struct ibm_struct  dytc_profile_driver_data = {
10610 	.name = "dytc-profile",
10611 	.exit = dytc_profile_exit,
10612 };
10613 
10614 /*************************************************************************
10615  * Keyboard language interface
10616  */
10617 
10618 struct keyboard_lang_data {
10619 	const char *lang_str;
10620 	int lang_code;
10621 };
10622 
10623 static const struct keyboard_lang_data keyboard_lang_data[] = {
10624 	{"be", 0x080c},
10625 	{"cz", 0x0405},
10626 	{"da", 0x0406},
10627 	{"de", 0x0c07},
10628 	{"en", 0x0000},
10629 	{"es", 0x2c0a},
10630 	{"et", 0x0425},
10631 	{"fr", 0x040c},
10632 	{"fr-ch", 0x100c},
10633 	{"hu", 0x040e},
10634 	{"it", 0x0410},
10635 	{"jp", 0x0411},
10636 	{"nl", 0x0413},
10637 	{"nn", 0x0414},
10638 	{"pl", 0x0415},
10639 	{"pt", 0x0816},
10640 	{"sl", 0x041b},
10641 	{"sv", 0x081d},
10642 	{"tr", 0x041f},
10643 };
10644 
10645 static int set_keyboard_lang_command(int command)
10646 {
10647 	acpi_handle sskl_handle;
10648 	int output;
10649 
10650 	if (ACPI_FAILURE(acpi_get_handle(hkey_handle, "SSKL", &sskl_handle))) {
10651 		/* Platform doesn't support SSKL */
10652 		return -ENODEV;
10653 	}
10654 
10655 	if (!acpi_evalf(sskl_handle, &output, NULL, "dd", command))
10656 		return -EIO;
10657 
10658 	return 0;
10659 }
10660 
10661 static int get_keyboard_lang(int *output)
10662 {
10663 	acpi_handle gskl_handle;
10664 	int kbd_lang;
10665 
10666 	if (ACPI_FAILURE(acpi_get_handle(hkey_handle, "GSKL", &gskl_handle))) {
10667 		/* Platform doesn't support GSKL */
10668 		return -ENODEV;
10669 	}
10670 
10671 	if (!acpi_evalf(gskl_handle, &kbd_lang, NULL, "dd", 0x02000000))
10672 		return -EIO;
10673 
10674 	/*
10675 	 * METHOD_ERR gets returned on devices where there are no special (e.g. '=',
10676 	 * '(' and ')') keys which use layout dependent key-press emulation.
10677 	 */
10678 	if (kbd_lang & METHOD_ERR)
10679 		return -ENODEV;
10680 
10681 	*output = kbd_lang;
10682 
10683 	return 0;
10684 }
10685 
10686 /* sysfs keyboard language entry */
10687 static ssize_t keyboard_lang_show(struct device *dev,
10688 				struct device_attribute *attr,
10689 				char *buf)
10690 {
10691 	int output, err, i, len = 0;
10692 
10693 	err = get_keyboard_lang(&output);
10694 	if (err)
10695 		return err;
10696 
10697 	for (i = 0; i < ARRAY_SIZE(keyboard_lang_data); i++) {
10698 		if (i)
10699 			len += sysfs_emit_at(buf, len, "%s", " ");
10700 
10701 		if (output == keyboard_lang_data[i].lang_code) {
10702 			len += sysfs_emit_at(buf, len, "[%s]", keyboard_lang_data[i].lang_str);
10703 		} else {
10704 			len += sysfs_emit_at(buf, len, "%s", keyboard_lang_data[i].lang_str);
10705 		}
10706 	}
10707 	len += sysfs_emit_at(buf, len, "\n");
10708 
10709 	return len;
10710 }
10711 
10712 static ssize_t keyboard_lang_store(struct device *dev,
10713 				struct device_attribute *attr,
10714 				const char *buf, size_t count)
10715 {
10716 	int err, i;
10717 	bool lang_found = false;
10718 	int lang_code = 0;
10719 
10720 	for (i = 0; i < ARRAY_SIZE(keyboard_lang_data); i++) {
10721 		if (sysfs_streq(buf, keyboard_lang_data[i].lang_str)) {
10722 			lang_code = keyboard_lang_data[i].lang_code;
10723 			lang_found = true;
10724 			break;
10725 		}
10726 	}
10727 
10728 	if (lang_found) {
10729 		lang_code = lang_code | 1 << 24;
10730 
10731 		/* Set language code */
10732 		err = set_keyboard_lang_command(lang_code);
10733 		if (err)
10734 			return err;
10735 	} else {
10736 		dev_err(&tpacpi_pdev->dev, "Unknown Keyboard language. Ignoring\n");
10737 		return -EINVAL;
10738 	}
10739 
10740 	tpacpi_disclose_usertask(attr->attr.name,
10741 			"keyboard language is set to  %s\n", buf);
10742 
10743 	sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, "keyboard_lang");
10744 
10745 	return count;
10746 }
10747 static DEVICE_ATTR_RW(keyboard_lang);
10748 
10749 static struct attribute *kbdlang_attributes[] = {
10750 	&dev_attr_keyboard_lang.attr,
10751 	NULL
10752 };
10753 
10754 static umode_t kbdlang_attr_is_visible(struct kobject *kobj,
10755 				       struct attribute *attr, int n)
10756 {
10757 	return tp_features.kbd_lang ? attr->mode : 0;
10758 }
10759 
10760 static const struct attribute_group kbdlang_attr_group = {
10761 	.is_visible = kbdlang_attr_is_visible,
10762 	.attrs = kbdlang_attributes,
10763 };
10764 
10765 static int tpacpi_kbdlang_init(struct ibm_init_struct *iibm)
10766 {
10767 	int err, output;
10768 
10769 	err = get_keyboard_lang(&output);
10770 	tp_features.kbd_lang = !err;
10771 	return err;
10772 }
10773 
10774 static struct ibm_struct kbdlang_driver_data = {
10775 	.name = "kbdlang",
10776 };
10777 
10778 /*************************************************************************
10779  * DPRC(Dynamic Power Reduction Control) subdriver, for the Lenovo WWAN
10780  * and WLAN feature.
10781  */
10782 #define DPRC_GET_WWAN_ANTENNA_TYPE      0x40000
10783 #define DPRC_WWAN_ANTENNA_TYPE_A_BIT    BIT(4)
10784 #define DPRC_WWAN_ANTENNA_TYPE_B_BIT    BIT(8)
10785 static bool has_antennatype;
10786 static int wwan_antennatype;
10787 
10788 static int dprc_command(int command, int *output)
10789 {
10790 	acpi_handle dprc_handle;
10791 
10792 	if (ACPI_FAILURE(acpi_get_handle(hkey_handle, "DPRC", &dprc_handle))) {
10793 		/* Platform doesn't support DPRC */
10794 		return -ENODEV;
10795 	}
10796 
10797 	if (!acpi_evalf(dprc_handle, output, NULL, "dd", command))
10798 		return -EIO;
10799 
10800 	/*
10801 	 * METHOD_ERR gets returned on devices where few commands are not supported
10802 	 * for example command to get WWAN Antenna type command is not supported on
10803 	 * some devices.
10804 	 */
10805 	if (*output & METHOD_ERR)
10806 		return -ENODEV;
10807 
10808 	return 0;
10809 }
10810 
10811 static int get_wwan_antenna(int *wwan_antennatype)
10812 {
10813 	int output, err;
10814 
10815 	/* Get current Antenna type */
10816 	err = dprc_command(DPRC_GET_WWAN_ANTENNA_TYPE, &output);
10817 	if (err)
10818 		return err;
10819 
10820 	if (output & DPRC_WWAN_ANTENNA_TYPE_A_BIT)
10821 		*wwan_antennatype = 1;
10822 	else if (output & DPRC_WWAN_ANTENNA_TYPE_B_BIT)
10823 		*wwan_antennatype = 2;
10824 	else
10825 		return -ENODEV;
10826 
10827 	return 0;
10828 }
10829 
10830 /* sysfs wwan antenna type entry */
10831 static ssize_t wwan_antenna_type_show(struct device *dev,
10832 					struct device_attribute *attr,
10833 					char *buf)
10834 {
10835 	switch (wwan_antennatype) {
10836 	case 1:
10837 		return sysfs_emit(buf, "type a\n");
10838 	case 2:
10839 		return sysfs_emit(buf, "type b\n");
10840 	default:
10841 		return -ENODATA;
10842 	}
10843 }
10844 static DEVICE_ATTR_RO(wwan_antenna_type);
10845 
10846 static struct attribute *dprc_attributes[] = {
10847 	&dev_attr_wwan_antenna_type.attr,
10848 	NULL
10849 };
10850 
10851 static umode_t dprc_attr_is_visible(struct kobject *kobj,
10852 				    struct attribute *attr, int n)
10853 {
10854 	return has_antennatype ? attr->mode : 0;
10855 }
10856 
10857 static const struct attribute_group dprc_attr_group = {
10858 	.is_visible = dprc_attr_is_visible,
10859 	.attrs = dprc_attributes,
10860 };
10861 
10862 static int tpacpi_dprc_init(struct ibm_init_struct *iibm)
10863 {
10864 	int err;
10865 
10866 	err = get_wwan_antenna(&wwan_antennatype);
10867 	if (err)
10868 		return err;
10869 
10870 	has_antennatype = true;
10871 	return 0;
10872 }
10873 
10874 static struct ibm_struct dprc_driver_data = {
10875 	.name = "dprc",
10876 };
10877 
10878 /* --------------------------------------------------------------------- */
10879 
10880 static struct attribute *tpacpi_driver_attributes[] = {
10881 	&driver_attr_debug_level.attr,
10882 	&driver_attr_version.attr,
10883 	&driver_attr_interface_version.attr,
10884 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
10885 	&driver_attr_wlsw_emulstate.attr,
10886 	&driver_attr_bluetooth_emulstate.attr,
10887 	&driver_attr_wwan_emulstate.attr,
10888 	&driver_attr_uwb_emulstate.attr,
10889 #endif
10890 	NULL
10891 };
10892 
10893 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
10894 static umode_t tpacpi_attr_is_visible(struct kobject *kobj,
10895 				      struct attribute *attr, int n)
10896 {
10897 	if (attr == &driver_attr_wlsw_emulstate.attr) {
10898 		if (!dbg_wlswemul)
10899 			return 0;
10900 	} else if (attr == &driver_attr_bluetooth_emulstate.attr) {
10901 		if (!dbg_bluetoothemul)
10902 			return 0;
10903 	} else if (attr == &driver_attr_wwan_emulstate.attr) {
10904 		if (!dbg_wwanemul)
10905 			return 0;
10906 	} else if (attr == &driver_attr_uwb_emulstate.attr) {
10907 		if (!dbg_uwbemul)
10908 			return 0;
10909 	}
10910 
10911 	return attr->mode;
10912 }
10913 #endif
10914 
10915 static const struct attribute_group tpacpi_driver_attr_group = {
10916 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
10917 	.is_visible = tpacpi_attr_is_visible,
10918 #endif
10919 	.attrs = tpacpi_driver_attributes,
10920 };
10921 
10922 static const struct attribute_group *tpacpi_driver_groups[] = {
10923 	&tpacpi_driver_attr_group,
10924 	NULL,
10925 };
10926 
10927 static const struct attribute_group *tpacpi_groups[] = {
10928 	&adaptive_kbd_attr_group,
10929 	&hotkey_attr_group,
10930 	&bluetooth_attr_group,
10931 	&wan_attr_group,
10932 	&cmos_attr_group,
10933 	&proxsensor_attr_group,
10934 	&kbdlang_attr_group,
10935 	&dprc_attr_group,
10936 	NULL,
10937 };
10938 
10939 static const struct attribute_group *tpacpi_hwmon_groups[] = {
10940 	&thermal_attr_group,
10941 	&temp_label_attr_group,
10942 	&fan_attr_group,
10943 	NULL,
10944 };
10945 
10946 static const struct attribute_group *tpacpi_hwmon_driver_groups[] = {
10947 	&fan_driver_attr_group,
10948 	NULL,
10949 };
10950 
10951 /****************************************************************************
10952  ****************************************************************************
10953  *
10954  * Platform drivers
10955  *
10956  ****************************************************************************
10957  ****************************************************************************/
10958 
10959 static struct platform_driver tpacpi_pdriver = {
10960 	.driver = {
10961 		.name = TPACPI_DRVR_NAME,
10962 		.pm = &tpacpi_pm,
10963 		.groups = tpacpi_driver_groups,
10964 		.dev_groups = tpacpi_groups,
10965 	},
10966 	.shutdown = tpacpi_shutdown_handler,
10967 };
10968 
10969 static struct platform_driver tpacpi_hwmon_pdriver = {
10970 	.driver = {
10971 		.name = TPACPI_HWMON_DRVR_NAME,
10972 		.groups = tpacpi_hwmon_driver_groups,
10973 	},
10974 };
10975 
10976 /****************************************************************************
10977  ****************************************************************************
10978  *
10979  * Infrastructure
10980  *
10981  ****************************************************************************
10982  ****************************************************************************/
10983 
10984 /*
10985  * HKEY event callout for other subdrivers go here
10986  * (yes, it is ugly, but it is quick, safe, and gets the job done
10987  */
10988 static void tpacpi_driver_event(const unsigned int hkey_event)
10989 {
10990 	if (ibm_backlight_device) {
10991 		switch (hkey_event) {
10992 		case TP_HKEY_EV_BRGHT_UP:
10993 		case TP_HKEY_EV_BRGHT_DOWN:
10994 			tpacpi_brightness_notify_change();
10995 		}
10996 	}
10997 	if (alsa_card) {
10998 		switch (hkey_event) {
10999 		case TP_HKEY_EV_VOL_UP:
11000 		case TP_HKEY_EV_VOL_DOWN:
11001 		case TP_HKEY_EV_VOL_MUTE:
11002 			volume_alsa_notify_change();
11003 		}
11004 	}
11005 	if (tp_features.kbdlight && hkey_event == TP_HKEY_EV_KBD_LIGHT) {
11006 		enum led_brightness brightness;
11007 
11008 		mutex_lock(&kbdlight_mutex);
11009 
11010 		/*
11011 		 * Check the brightness actually changed, setting the brightness
11012 		 * through kbdlight_set_level() also triggers this event.
11013 		 */
11014 		brightness = kbdlight_sysfs_get(NULL);
11015 		if (kbdlight_brightness != brightness) {
11016 			kbdlight_brightness = brightness;
11017 			led_classdev_notify_brightness_hw_changed(
11018 				&tpacpi_led_kbdlight.led_classdev, brightness);
11019 		}
11020 
11021 		mutex_unlock(&kbdlight_mutex);
11022 	}
11023 
11024 	if (hkey_event == TP_HKEY_EV_THM_CSM_COMPLETED) {
11025 		lapsensor_refresh();
11026 		/* If we are already accessing DYTC then skip dytc update */
11027 		if (!atomic_add_unless(&dytc_ignore_event, -1, 0))
11028 			dytc_profile_refresh();
11029 	}
11030 
11031 	if (lcdshadow_dev && hkey_event == TP_HKEY_EV_PRIVACYGUARD_TOGGLE) {
11032 		enum drm_privacy_screen_status old_hw_state;
11033 		bool changed;
11034 
11035 		mutex_lock(&lcdshadow_dev->lock);
11036 		old_hw_state = lcdshadow_dev->hw_state;
11037 		lcdshadow_get_hw_state(lcdshadow_dev);
11038 		changed = lcdshadow_dev->hw_state != old_hw_state;
11039 		mutex_unlock(&lcdshadow_dev->lock);
11040 
11041 		if (changed)
11042 			drm_privacy_screen_call_notifier_chain(lcdshadow_dev);
11043 	}
11044 	if (hkey_event == TP_HKEY_EV_AMT_TOGGLE) {
11045 		/* If we're enabling AMT we need to force balanced mode */
11046 		if (!dytc_amt_active)
11047 			/* This will also set AMT mode enabled */
11048 			dytc_profile_set(NULL, PLATFORM_PROFILE_BALANCED);
11049 		else
11050 			dytc_control_amt(!dytc_amt_active);
11051 	}
11052 
11053 }
11054 
11055 static void hotkey_driver_event(const unsigned int scancode)
11056 {
11057 	tpacpi_driver_event(TP_HKEY_EV_HOTKEY_BASE + scancode);
11058 }
11059 
11060 /* --------------------------------------------------------------------- */
11061 
11062 /* /proc support */
11063 static struct proc_dir_entry *proc_dir;
11064 
11065 /*
11066  * Module and infrastructure proble, init and exit handling
11067  */
11068 
11069 static bool force_load;
11070 
11071 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
11072 static const char * __init str_supported(int is_supported)
11073 {
11074 	static char text_unsupported[] __initdata = "not supported";
11075 
11076 	return (is_supported) ? &text_unsupported[4] : &text_unsupported[0];
11077 }
11078 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
11079 
11080 static void ibm_exit(struct ibm_struct *ibm)
11081 {
11082 	dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
11083 
11084 	list_del_init(&ibm->all_drivers);
11085 
11086 	if (ibm->flags.acpi_notify_installed) {
11087 		dbg_printk(TPACPI_DBG_EXIT,
11088 			"%s: acpi_remove_notify_handler\n", ibm->name);
11089 		BUG_ON(!ibm->acpi);
11090 		acpi_remove_notify_handler(*ibm->acpi->handle,
11091 					   ibm->acpi->type,
11092 					   dispatch_acpi_notify);
11093 		ibm->flags.acpi_notify_installed = 0;
11094 	}
11095 
11096 	if (ibm->flags.proc_created) {
11097 		dbg_printk(TPACPI_DBG_EXIT,
11098 			"%s: remove_proc_entry\n", ibm->name);
11099 		remove_proc_entry(ibm->name, proc_dir);
11100 		ibm->flags.proc_created = 0;
11101 	}
11102 
11103 	if (ibm->flags.acpi_driver_registered) {
11104 		dbg_printk(TPACPI_DBG_EXIT,
11105 			"%s: acpi_bus_unregister_driver\n", ibm->name);
11106 		BUG_ON(!ibm->acpi);
11107 		acpi_bus_unregister_driver(ibm->acpi->driver);
11108 		kfree(ibm->acpi->driver);
11109 		ibm->acpi->driver = NULL;
11110 		ibm->flags.acpi_driver_registered = 0;
11111 	}
11112 
11113 	if (ibm->flags.init_called && ibm->exit) {
11114 		ibm->exit();
11115 		ibm->flags.init_called = 0;
11116 	}
11117 
11118 	dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
11119 }
11120 
11121 static int __init ibm_init(struct ibm_init_struct *iibm)
11122 {
11123 	int ret;
11124 	struct ibm_struct *ibm = iibm->data;
11125 	struct proc_dir_entry *entry;
11126 
11127 	BUG_ON(ibm == NULL);
11128 
11129 	INIT_LIST_HEAD(&ibm->all_drivers);
11130 
11131 	if (ibm->flags.experimental && !experimental)
11132 		return 0;
11133 
11134 	dbg_printk(TPACPI_DBG_INIT,
11135 		"probing for %s\n", ibm->name);
11136 
11137 	if (iibm->init) {
11138 		ret = iibm->init(iibm);
11139 		if (ret > 0 || ret == -ENODEV)
11140 			return 0; /* subdriver functionality not available */
11141 		if (ret)
11142 			return ret;
11143 
11144 		ibm->flags.init_called = 1;
11145 	}
11146 
11147 	if (ibm->acpi) {
11148 		if (ibm->acpi->hid) {
11149 			ret = register_tpacpi_subdriver(ibm);
11150 			if (ret)
11151 				goto err_out;
11152 		}
11153 
11154 		if (ibm->acpi->notify) {
11155 			ret = setup_acpi_notify(ibm);
11156 			if (ret == -ENODEV) {
11157 				pr_notice("disabling subdriver %s\n",
11158 					  ibm->name);
11159 				ret = 0;
11160 				goto err_out;
11161 			}
11162 			if (ret < 0)
11163 				goto err_out;
11164 		}
11165 	}
11166 
11167 	dbg_printk(TPACPI_DBG_INIT,
11168 		"%s installed\n", ibm->name);
11169 
11170 	if (ibm->read) {
11171 		umode_t mode = iibm->base_procfs_mode;
11172 
11173 		if (!mode)
11174 			mode = S_IRUGO;
11175 		if (ibm->write)
11176 			mode |= S_IWUSR;
11177 		entry = proc_create_data(ibm->name, mode, proc_dir,
11178 					 &dispatch_proc_ops, ibm);
11179 		if (!entry) {
11180 			pr_err("unable to create proc entry %s\n", ibm->name);
11181 			ret = -ENODEV;
11182 			goto err_out;
11183 		}
11184 		ibm->flags.proc_created = 1;
11185 	}
11186 
11187 	list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
11188 
11189 	return 0;
11190 
11191 err_out:
11192 	dbg_printk(TPACPI_DBG_INIT,
11193 		"%s: at error exit path with result %d\n",
11194 		ibm->name, ret);
11195 
11196 	ibm_exit(ibm);
11197 	return (ret < 0) ? ret : 0;
11198 }
11199 
11200 /* Probing */
11201 
11202 static char __init tpacpi_parse_fw_id(const char * const s,
11203 				      u32 *model, u16 *release)
11204 {
11205 	int i;
11206 
11207 	if (!s || strlen(s) < 8)
11208 		goto invalid;
11209 
11210 	for (i = 0; i < 8; i++)
11211 		if (!((s[i] >= '0' && s[i] <= '9') ||
11212 		      (s[i] >= 'A' && s[i] <= 'Z')))
11213 			goto invalid;
11214 
11215 	/*
11216 	 * Most models: xxyTkkWW (#.##c)
11217 	 * Ancient 570/600 and -SL lacks (#.##c)
11218 	 */
11219 	if (s[3] == 'T' || s[3] == 'N') {
11220 		*model = TPID(s[0], s[1]);
11221 		*release = TPVER(s[4], s[5]);
11222 		return s[2];
11223 
11224 	/* New models: xxxyTkkW (#.##c); T550 and some others */
11225 	} else if (s[4] == 'T' || s[4] == 'N') {
11226 		*model = TPID3(s[0], s[1], s[2]);
11227 		*release = TPVER(s[5], s[6]);
11228 		return s[3];
11229 	}
11230 
11231 invalid:
11232 	return '\0';
11233 }
11234 
11235 static void find_new_ec_fwstr(const struct dmi_header *dm, void *private)
11236 {
11237 	char *ec_fw_string = (char *) private;
11238 	const char *dmi_data = (const char *)dm;
11239 	/*
11240 	 * ThinkPad Embedded Controller Program Table on newer models
11241 	 *
11242 	 * Offset |  Name                | Width  | Description
11243 	 * ----------------------------------------------------
11244 	 *  0x00  | Type                 | BYTE   | 0x8C
11245 	 *  0x01  | Length               | BYTE   |
11246 	 *  0x02  | Handle               | WORD   | Varies
11247 	 *  0x04  | Signature            | BYTEx6 | ASCII for "LENOVO"
11248 	 *  0x0A  | OEM struct offset    | BYTE   | 0x0B
11249 	 *  0x0B  | OEM struct number    | BYTE   | 0x07, for this structure
11250 	 *  0x0C  | OEM struct revision  | BYTE   | 0x01, for this format
11251 	 *  0x0D  | ECP version ID       | STR ID |
11252 	 *  0x0E  | ECP release date     | STR ID |
11253 	 */
11254 
11255 	/* Return if data structure not match */
11256 	if (dm->type != 140 || dm->length < 0x0F ||
11257 	memcmp(dmi_data + 4, "LENOVO", 6) != 0 ||
11258 	dmi_data[0x0A] != 0x0B || dmi_data[0x0B] != 0x07 ||
11259 	dmi_data[0x0C] != 0x01)
11260 		return;
11261 
11262 	/* fwstr is the first 8byte string  */
11263 	strncpy(ec_fw_string, dmi_data + 0x0F, 8);
11264 }
11265 
11266 /* returns 0 - probe ok, or < 0 - probe error.
11267  * Probe ok doesn't mean thinkpad found.
11268  * On error, kfree() cleanup on tp->* is not performed, caller must do it */
11269 static int __must_check __init get_thinkpad_model_data(
11270 						struct thinkpad_id_data *tp)
11271 {
11272 	const struct dmi_device *dev = NULL;
11273 	char ec_fw_string[18] = {0};
11274 	char const *s;
11275 	char t;
11276 
11277 	if (!tp)
11278 		return -EINVAL;
11279 
11280 	memset(tp, 0, sizeof(*tp));
11281 
11282 	if (dmi_name_in_vendors("IBM"))
11283 		tp->vendor = PCI_VENDOR_ID_IBM;
11284 	else if (dmi_name_in_vendors("LENOVO"))
11285 		tp->vendor = PCI_VENDOR_ID_LENOVO;
11286 	else
11287 		return 0;
11288 
11289 	s = dmi_get_system_info(DMI_BIOS_VERSION);
11290 	tp->bios_version_str = kstrdup(s, GFP_KERNEL);
11291 	if (s && !tp->bios_version_str)
11292 		return -ENOMEM;
11293 
11294 	/* Really ancient ThinkPad 240X will fail this, which is fine */
11295 	t = tpacpi_parse_fw_id(tp->bios_version_str,
11296 			       &tp->bios_model, &tp->bios_release);
11297 	if (t != 'E' && t != 'C')
11298 		return 0;
11299 
11300 	/*
11301 	 * ThinkPad T23 or newer, A31 or newer, R50e or newer,
11302 	 * X32 or newer, all Z series;  Some models must have an
11303 	 * up-to-date BIOS or they will not be detected.
11304 	 *
11305 	 * See https://thinkwiki.org/wiki/List_of_DMI_IDs
11306 	 */
11307 	while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
11308 		if (sscanf(dev->name,
11309 			   "IBM ThinkPad Embedded Controller -[%17c",
11310 			   ec_fw_string) == 1) {
11311 			ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
11312 			ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
11313 			break;
11314 		}
11315 	}
11316 
11317 	/* Newer ThinkPads have different EC program info table */
11318 	if (!ec_fw_string[0])
11319 		dmi_walk(find_new_ec_fwstr, &ec_fw_string);
11320 
11321 	if (ec_fw_string[0]) {
11322 		tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL);
11323 		if (!tp->ec_version_str)
11324 			return -ENOMEM;
11325 
11326 		t = tpacpi_parse_fw_id(ec_fw_string,
11327 			 &tp->ec_model, &tp->ec_release);
11328 		if (t != 'H') {
11329 			pr_notice("ThinkPad firmware release %s doesn't match the known patterns\n",
11330 				  ec_fw_string);
11331 			pr_notice("please report this to %s\n", TPACPI_MAIL);
11332 		}
11333 	}
11334 
11335 	s = dmi_get_system_info(DMI_PRODUCT_VERSION);
11336 	if (s && !(strncasecmp(s, "ThinkPad", 8) && strncasecmp(s, "Lenovo", 6))) {
11337 		tp->model_str = kstrdup(s, GFP_KERNEL);
11338 		if (!tp->model_str)
11339 			return -ENOMEM;
11340 	} else {
11341 		s = dmi_get_system_info(DMI_BIOS_VENDOR);
11342 		if (s && !(strncasecmp(s, "Lenovo", 6))) {
11343 			tp->model_str = kstrdup(s, GFP_KERNEL);
11344 			if (!tp->model_str)
11345 				return -ENOMEM;
11346 		}
11347 	}
11348 
11349 	s = dmi_get_system_info(DMI_PRODUCT_NAME);
11350 	tp->nummodel_str = kstrdup(s, GFP_KERNEL);
11351 	if (s && !tp->nummodel_str)
11352 		return -ENOMEM;
11353 
11354 	return 0;
11355 }
11356 
11357 static int __init probe_for_thinkpad(void)
11358 {
11359 	int is_thinkpad;
11360 
11361 	if (acpi_disabled)
11362 		return -ENODEV;
11363 
11364 	/* It would be dangerous to run the driver in this case */
11365 	if (!tpacpi_is_ibm() && !tpacpi_is_lenovo())
11366 		return -ENODEV;
11367 
11368 	/*
11369 	 * Non-ancient models have better DMI tagging, but very old models
11370 	 * don't.  tpacpi_is_fw_known() is a cheat to help in that case.
11371 	 */
11372 	is_thinkpad = (thinkpad_id.model_str != NULL) ||
11373 		      (thinkpad_id.ec_model != 0) ||
11374 		      tpacpi_is_fw_known();
11375 
11376 	/* The EC handler is required */
11377 	tpacpi_acpi_handle_locate("ec", TPACPI_ACPI_EC_HID, &ec_handle);
11378 	if (!ec_handle) {
11379 		if (is_thinkpad)
11380 			pr_err("Not yet supported ThinkPad detected!\n");
11381 		return -ENODEV;
11382 	}
11383 
11384 	if (!is_thinkpad && !force_load)
11385 		return -ENODEV;
11386 
11387 	return 0;
11388 }
11389 
11390 static void __init thinkpad_acpi_init_banner(void)
11391 {
11392 	pr_info("%s v%s\n", TPACPI_DESC, TPACPI_VERSION);
11393 	pr_info("%s\n", TPACPI_URL);
11394 
11395 	pr_info("ThinkPad BIOS %s, EC %s\n",
11396 		(thinkpad_id.bios_version_str) ?
11397 			thinkpad_id.bios_version_str : "unknown",
11398 		(thinkpad_id.ec_version_str) ?
11399 			thinkpad_id.ec_version_str : "unknown");
11400 
11401 	BUG_ON(!thinkpad_id.vendor);
11402 
11403 	if (thinkpad_id.model_str)
11404 		pr_info("%s %s, model %s\n",
11405 			(thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
11406 				"IBM" : ((thinkpad_id.vendor ==
11407 						PCI_VENDOR_ID_LENOVO) ?
11408 					"Lenovo" : "Unknown vendor"),
11409 			thinkpad_id.model_str,
11410 			(thinkpad_id.nummodel_str) ?
11411 				thinkpad_id.nummodel_str : "unknown");
11412 }
11413 
11414 /* Module init, exit, parameters */
11415 
11416 static struct ibm_init_struct ibms_init[] __initdata = {
11417 	{
11418 		.data = &thinkpad_acpi_driver_data,
11419 	},
11420 	{
11421 		.init = hotkey_init,
11422 		.data = &hotkey_driver_data,
11423 	},
11424 	{
11425 		.init = bluetooth_init,
11426 		.data = &bluetooth_driver_data,
11427 	},
11428 	{
11429 		.init = wan_init,
11430 		.data = &wan_driver_data,
11431 	},
11432 	{
11433 		.init = uwb_init,
11434 		.data = &uwb_driver_data,
11435 	},
11436 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
11437 	{
11438 		.init = video_init,
11439 		.base_procfs_mode = S_IRUSR,
11440 		.data = &video_driver_data,
11441 	},
11442 #endif
11443 	{
11444 		.init = kbdlight_init,
11445 		.data = &kbdlight_driver_data,
11446 	},
11447 	{
11448 		.init = light_init,
11449 		.data = &light_driver_data,
11450 	},
11451 	{
11452 		.init = cmos_init,
11453 		.data = &cmos_driver_data,
11454 	},
11455 	{
11456 		.init = led_init,
11457 		.data = &led_driver_data,
11458 	},
11459 	{
11460 		.init = beep_init,
11461 		.data = &beep_driver_data,
11462 	},
11463 	{
11464 		.init = thermal_init,
11465 		.data = &thermal_driver_data,
11466 	},
11467 	{
11468 		.init = brightness_init,
11469 		.data = &brightness_driver_data,
11470 	},
11471 	{
11472 		.init = volume_init,
11473 		.data = &volume_driver_data,
11474 	},
11475 	{
11476 		.init = fan_init,
11477 		.data = &fan_driver_data,
11478 	},
11479 	{
11480 		.init = mute_led_init,
11481 		.data = &mute_led_driver_data,
11482 	},
11483 	{
11484 		.init = tpacpi_battery_init,
11485 		.data = &battery_driver_data,
11486 	},
11487 	{
11488 		.init = tpacpi_lcdshadow_init,
11489 		.data = &lcdshadow_driver_data,
11490 	},
11491 	{
11492 		.init = tpacpi_proxsensor_init,
11493 		.data = &proxsensor_driver_data,
11494 	},
11495 	{
11496 		.init = tpacpi_dytc_profile_init,
11497 		.data = &dytc_profile_driver_data,
11498 	},
11499 	{
11500 		.init = tpacpi_kbdlang_init,
11501 		.data = &kbdlang_driver_data,
11502 	},
11503 	{
11504 		.init = tpacpi_dprc_init,
11505 		.data = &dprc_driver_data,
11506 	},
11507 };
11508 
11509 static int __init set_ibm_param(const char *val, const struct kernel_param *kp)
11510 {
11511 	unsigned int i;
11512 	struct ibm_struct *ibm;
11513 
11514 	if (!kp || !kp->name || !val)
11515 		return -EINVAL;
11516 
11517 	for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
11518 		ibm = ibms_init[i].data;
11519 		if (!ibm || !ibm->name)
11520 			continue;
11521 
11522 		if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
11523 			if (strlen(val) > sizeof(ibms_init[i].param) - 1)
11524 				return -ENOSPC;
11525 			strcpy(ibms_init[i].param, val);
11526 			return 0;
11527 		}
11528 	}
11529 
11530 	return -EINVAL;
11531 }
11532 
11533 module_param(experimental, int, 0444);
11534 MODULE_PARM_DESC(experimental,
11535 		 "Enables experimental features when non-zero");
11536 
11537 module_param_named(debug, dbg_level, uint, 0);
11538 MODULE_PARM_DESC(debug, "Sets debug level bit-mask");
11539 
11540 module_param(force_load, bool, 0444);
11541 MODULE_PARM_DESC(force_load,
11542 		 "Attempts to load the driver even on a mis-identified ThinkPad when true");
11543 
11544 module_param_named(fan_control, fan_control_allowed, bool, 0444);
11545 MODULE_PARM_DESC(fan_control,
11546 		 "Enables setting fan parameters features when true");
11547 
11548 module_param_named(brightness_mode, brightness_mode, uint, 0444);
11549 MODULE_PARM_DESC(brightness_mode,
11550 		 "Selects brightness control strategy: 0=auto, 1=EC, 2=UCMS, 3=EC+NVRAM");
11551 
11552 module_param(brightness_enable, uint, 0444);
11553 MODULE_PARM_DESC(brightness_enable,
11554 		 "Enables backlight control when 1, disables when 0");
11555 
11556 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT
11557 module_param_named(volume_mode, volume_mode, uint, 0444);
11558 MODULE_PARM_DESC(volume_mode,
11559 		 "Selects volume control strategy: 0=auto, 1=EC, 2=N/A, 3=EC+NVRAM");
11560 
11561 module_param_named(volume_capabilities, volume_capabilities, uint, 0444);
11562 MODULE_PARM_DESC(volume_capabilities,
11563 		 "Selects the mixer capabilities: 0=auto, 1=volume and mute, 2=mute only");
11564 
11565 module_param_named(volume_control, volume_control_allowed, bool, 0444);
11566 MODULE_PARM_DESC(volume_control,
11567 		 "Enables software override for the console audio control when true");
11568 
11569 module_param_named(software_mute, software_mute_requested, bool, 0444);
11570 MODULE_PARM_DESC(software_mute,
11571 		 "Request full software mute control");
11572 
11573 /* ALSA module API parameters */
11574 module_param_named(index, alsa_index, int, 0444);
11575 MODULE_PARM_DESC(index, "ALSA index for the ACPI EC Mixer");
11576 module_param_named(id, alsa_id, charp, 0444);
11577 MODULE_PARM_DESC(id, "ALSA id for the ACPI EC Mixer");
11578 module_param_named(enable, alsa_enable, bool, 0444);
11579 MODULE_PARM_DESC(enable, "Enable the ALSA interface for the ACPI EC Mixer");
11580 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */
11581 
11582 /* The module parameter can't be read back, that's why 0 is used here */
11583 #define TPACPI_PARAM(feature) \
11584 	module_param_call(feature, set_ibm_param, NULL, NULL, 0); \
11585 	MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command at module load, see documentation")
11586 
11587 TPACPI_PARAM(hotkey);
11588 TPACPI_PARAM(bluetooth);
11589 TPACPI_PARAM(video);
11590 TPACPI_PARAM(light);
11591 TPACPI_PARAM(cmos);
11592 TPACPI_PARAM(led);
11593 TPACPI_PARAM(beep);
11594 TPACPI_PARAM(brightness);
11595 TPACPI_PARAM(volume);
11596 TPACPI_PARAM(fan);
11597 
11598 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
11599 module_param(dbg_wlswemul, uint, 0444);
11600 MODULE_PARM_DESC(dbg_wlswemul, "Enables WLSW emulation");
11601 module_param_named(wlsw_state, tpacpi_wlsw_emulstate, bool, 0);
11602 MODULE_PARM_DESC(wlsw_state,
11603 		 "Initial state of the emulated WLSW switch");
11604 
11605 module_param(dbg_bluetoothemul, uint, 0444);
11606 MODULE_PARM_DESC(dbg_bluetoothemul, "Enables bluetooth switch emulation");
11607 module_param_named(bluetooth_state, tpacpi_bluetooth_emulstate, bool, 0);
11608 MODULE_PARM_DESC(bluetooth_state,
11609 		 "Initial state of the emulated bluetooth switch");
11610 
11611 module_param(dbg_wwanemul, uint, 0444);
11612 MODULE_PARM_DESC(dbg_wwanemul, "Enables WWAN switch emulation");
11613 module_param_named(wwan_state, tpacpi_wwan_emulstate, bool, 0);
11614 MODULE_PARM_DESC(wwan_state,
11615 		 "Initial state of the emulated WWAN switch");
11616 
11617 module_param(dbg_uwbemul, uint, 0444);
11618 MODULE_PARM_DESC(dbg_uwbemul, "Enables UWB switch emulation");
11619 module_param_named(uwb_state, tpacpi_uwb_emulstate, bool, 0);
11620 MODULE_PARM_DESC(uwb_state,
11621 		 "Initial state of the emulated UWB switch");
11622 #endif
11623 
11624 static void thinkpad_acpi_module_exit(void)
11625 {
11626 	struct ibm_struct *ibm, *itmp;
11627 
11628 	tpacpi_lifecycle = TPACPI_LIFE_EXITING;
11629 
11630 #ifdef CONFIG_SUSPEND
11631 	if (tp_features.quirks && tp_features.quirks->s2idle_bug_mmio)
11632 		acpi_unregister_lps0_dev(&thinkpad_acpi_s2idle_dev_ops);
11633 #endif
11634 	if (tpacpi_hwmon)
11635 		hwmon_device_unregister(tpacpi_hwmon);
11636 	if (tp_features.sensors_pdrv_registered)
11637 		platform_driver_unregister(&tpacpi_hwmon_pdriver);
11638 	if (tp_features.platform_drv_registered)
11639 		platform_driver_unregister(&tpacpi_pdriver);
11640 
11641 	list_for_each_entry_safe_reverse(ibm, itmp,
11642 					 &tpacpi_all_drivers,
11643 					 all_drivers) {
11644 		ibm_exit(ibm);
11645 	}
11646 
11647 	dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
11648 
11649 	if (tpacpi_inputdev) {
11650 		if (tp_features.input_device_registered)
11651 			input_unregister_device(tpacpi_inputdev);
11652 		else
11653 			input_free_device(tpacpi_inputdev);
11654 		kfree(hotkey_keycode_map);
11655 	}
11656 
11657 	if (tpacpi_sensors_pdev)
11658 		platform_device_unregister(tpacpi_sensors_pdev);
11659 	if (tpacpi_pdev)
11660 		platform_device_unregister(tpacpi_pdev);
11661 	if (proc_dir)
11662 		remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir);
11663 	if (tpacpi_wq)
11664 		destroy_workqueue(tpacpi_wq);
11665 
11666 	kfree(thinkpad_id.bios_version_str);
11667 	kfree(thinkpad_id.ec_version_str);
11668 	kfree(thinkpad_id.model_str);
11669 	kfree(thinkpad_id.nummodel_str);
11670 }
11671 
11672 
11673 static int __init thinkpad_acpi_module_init(void)
11674 {
11675 	const struct dmi_system_id *dmi_id;
11676 	int ret, i;
11677 
11678 	tpacpi_lifecycle = TPACPI_LIFE_INIT;
11679 
11680 	/* Driver-level probe */
11681 
11682 	ret = get_thinkpad_model_data(&thinkpad_id);
11683 	if (ret) {
11684 		pr_err("unable to get DMI data: %d\n", ret);
11685 		thinkpad_acpi_module_exit();
11686 		return ret;
11687 	}
11688 	ret = probe_for_thinkpad();
11689 	if (ret) {
11690 		thinkpad_acpi_module_exit();
11691 		return ret;
11692 	}
11693 
11694 	/* Driver initialization */
11695 
11696 	thinkpad_acpi_init_banner();
11697 	tpacpi_check_outdated_fw();
11698 
11699 	TPACPI_ACPIHANDLE_INIT(ecrd);
11700 	TPACPI_ACPIHANDLE_INIT(ecwr);
11701 
11702 	tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME);
11703 	if (!tpacpi_wq) {
11704 		thinkpad_acpi_module_exit();
11705 		return -ENOMEM;
11706 	}
11707 
11708 	proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir);
11709 	if (!proc_dir) {
11710 		pr_err("unable to create proc dir " TPACPI_PROC_DIR "\n");
11711 		thinkpad_acpi_module_exit();
11712 		return -ENODEV;
11713 	}
11714 
11715 	dmi_id = dmi_first_match(fwbug_list);
11716 	if (dmi_id)
11717 		tp_features.quirks = dmi_id->driver_data;
11718 
11719 	/* Device initialization */
11720 	tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, PLATFORM_DEVID_NONE,
11721 							NULL, 0);
11722 	if (IS_ERR(tpacpi_pdev)) {
11723 		ret = PTR_ERR(tpacpi_pdev);
11724 		tpacpi_pdev = NULL;
11725 		pr_err("unable to register platform device\n");
11726 		thinkpad_acpi_module_exit();
11727 		return ret;
11728 	}
11729 	tpacpi_sensors_pdev = platform_device_register_simple(
11730 						TPACPI_HWMON_DRVR_NAME,
11731 						PLATFORM_DEVID_NONE, NULL, 0);
11732 	if (IS_ERR(tpacpi_sensors_pdev)) {
11733 		ret = PTR_ERR(tpacpi_sensors_pdev);
11734 		tpacpi_sensors_pdev = NULL;
11735 		pr_err("unable to register hwmon platform device\n");
11736 		thinkpad_acpi_module_exit();
11737 		return ret;
11738 	}
11739 
11740 	mutex_init(&tpacpi_inputdev_send_mutex);
11741 	tpacpi_inputdev = input_allocate_device();
11742 	if (!tpacpi_inputdev) {
11743 		thinkpad_acpi_module_exit();
11744 		return -ENOMEM;
11745 	} else {
11746 		/* Prepare input device, but don't register */
11747 		tpacpi_inputdev->name = "ThinkPad Extra Buttons";
11748 		tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0";
11749 		tpacpi_inputdev->id.bustype = BUS_HOST;
11750 		tpacpi_inputdev->id.vendor = thinkpad_id.vendor;
11751 		tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
11752 		tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
11753 		tpacpi_inputdev->dev.parent = &tpacpi_pdev->dev;
11754 	}
11755 
11756 	/* Init subdriver dependencies */
11757 	tpacpi_detect_brightness_capabilities();
11758 
11759 	/* Init subdrivers */
11760 	for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
11761 		ret = ibm_init(&ibms_init[i]);
11762 		if (ret >= 0 && *ibms_init[i].param)
11763 			ret = ibms_init[i].data->write(ibms_init[i].param);
11764 		if (ret < 0) {
11765 			thinkpad_acpi_module_exit();
11766 			return ret;
11767 		}
11768 	}
11769 
11770 	tpacpi_lifecycle = TPACPI_LIFE_RUNNING;
11771 
11772 	ret = platform_driver_register(&tpacpi_pdriver);
11773 	if (ret) {
11774 		pr_err("unable to register main platform driver\n");
11775 		thinkpad_acpi_module_exit();
11776 		return ret;
11777 	}
11778 	tp_features.platform_drv_registered = 1;
11779 
11780 	ret = platform_driver_register(&tpacpi_hwmon_pdriver);
11781 	if (ret) {
11782 		pr_err("unable to register hwmon platform driver\n");
11783 		thinkpad_acpi_module_exit();
11784 		return ret;
11785 	}
11786 	tp_features.sensors_pdrv_registered = 1;
11787 
11788 	tpacpi_hwmon = hwmon_device_register_with_groups(
11789 		&tpacpi_sensors_pdev->dev, TPACPI_NAME, NULL, tpacpi_hwmon_groups);
11790 	if (IS_ERR(tpacpi_hwmon)) {
11791 		ret = PTR_ERR(tpacpi_hwmon);
11792 		tpacpi_hwmon = NULL;
11793 		pr_err("unable to register hwmon device\n");
11794 		thinkpad_acpi_module_exit();
11795 		return ret;
11796 	}
11797 
11798 	ret = input_register_device(tpacpi_inputdev);
11799 	if (ret < 0) {
11800 		pr_err("unable to register input device\n");
11801 		thinkpad_acpi_module_exit();
11802 		return ret;
11803 	} else {
11804 		tp_features.input_device_registered = 1;
11805 	}
11806 
11807 #ifdef CONFIG_SUSPEND
11808 	if (tp_features.quirks && tp_features.quirks->s2idle_bug_mmio) {
11809 		if (!acpi_register_lps0_dev(&thinkpad_acpi_s2idle_dev_ops))
11810 			pr_info("Using s2idle quirk to avoid %s platform firmware bug\n",
11811 				(dmi_id && dmi_id->ident) ? dmi_id->ident : "");
11812 	}
11813 #endif
11814 	return 0;
11815 }
11816 
11817 MODULE_ALIAS(TPACPI_DRVR_SHORTNAME);
11818 
11819 /*
11820  * This will autoload the driver in almost every ThinkPad
11821  * in widespread use.
11822  *
11823  * Only _VERY_ old models, like the 240, 240x and 570 lack
11824  * the HKEY event interface.
11825  */
11826 MODULE_DEVICE_TABLE(acpi, ibm_htk_device_ids);
11827 
11828 /*
11829  * DMI matching for module autoloading
11830  *
11831  * See https://thinkwiki.org/wiki/List_of_DMI_IDs
11832  * See https://thinkwiki.org/wiki/BIOS_Upgrade_Downloads
11833  *
11834  * Only models listed in thinkwiki will be supported, so add yours
11835  * if it is not there yet.
11836  */
11837 #define IBM_BIOS_MODULE_ALIAS(__type) \
11838 	MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW*")
11839 
11840 /* Ancient thinkpad BIOSes have to be identified by
11841  * BIOS type or model number, and there are far less
11842  * BIOS types than model numbers... */
11843 IBM_BIOS_MODULE_ALIAS("I[MU]");		/* 570, 570e */
11844 
11845 MODULE_AUTHOR("Borislav Deianov <borislav@users.sf.net>");
11846 MODULE_AUTHOR("Henrique de Moraes Holschuh <hmh@hmh.eng.br>");
11847 MODULE_DESCRIPTION(TPACPI_DESC);
11848 MODULE_VERSION(TPACPI_VERSION);
11849 MODULE_LICENSE("GPL");
11850 
11851 module_init(thinkpad_acpi_module_init);
11852 module_exit(thinkpad_acpi_module_exit);
11853