1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Driver for Dell laptop extras
4 *
5 * Copyright (c) Red Hat <mjg@redhat.com>
6 * Copyright (c) 2014 Gabriele Mazzotta <gabriele.mzt@gmail.com>
7 * Copyright (c) 2014 Pali Rohár <pali@kernel.org>
8 *
9 * Based on documentation in the libsmbios package:
10 * Copyright (C) 2005-2014 Dell Inc.
11 */
12
13 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
14
15 #include <linux/module.h>
16 #include <linux/kernel.h>
17 #include <linux/init.h>
18 #include <linux/platform_device.h>
19 #include <linux/backlight.h>
20 #include <linux/err.h>
21 #include <linux/dmi.h>
22 #include <linux/io.h>
23 #include <linux/rfkill.h>
24 #include <linux/power_supply.h>
25 #include <linux/acpi.h>
26 #include <linux/mm.h>
27 #include <linux/i8042.h>
28 #include <linux/debugfs.h>
29 #include <linux/seq_file.h>
30 #include <acpi/video.h>
31 #include "dell-rbtn.h"
32 #include "dell-smbios.h"
33
34 #include "dell-wmi-privacy.h"
35
36 struct quirk_entry {
37 bool touchpad_led;
38 bool kbd_led_not_present;
39 bool kbd_led_levels_off_1;
40 bool kbd_missing_ac_tag;
41
42 bool needs_kbd_timeouts;
43 /*
44 * Ordered list of timeouts expressed in seconds.
45 * The list must end with -1
46 */
47 int kbd_timeouts[];
48 };
49
50 static struct quirk_entry *quirks;
51
52 static struct quirk_entry quirk_dell_vostro_v130 = {
53 .touchpad_led = true,
54 };
55
dmi_matched(const struct dmi_system_id * dmi)56 static int __init dmi_matched(const struct dmi_system_id *dmi)
57 {
58 quirks = dmi->driver_data;
59 return 1;
60 }
61
62 /*
63 * These values come from Windows utility provided by Dell. If any other value
64 * is used then BIOS silently set timeout to 0 without any error message.
65 */
66 static struct quirk_entry quirk_dell_xps13_9333 = {
67 .needs_kbd_timeouts = true,
68 .kbd_timeouts = { 0, 5, 15, 60, 5 * 60, 15 * 60, -1 },
69 };
70
71 static struct quirk_entry quirk_dell_xps13_9370 = {
72 .kbd_missing_ac_tag = true,
73 };
74
75 static struct quirk_entry quirk_dell_latitude_e6410 = {
76 .kbd_led_levels_off_1 = true,
77 };
78
79 static struct quirk_entry quirk_dell_inspiron_1012 = {
80 .kbd_led_not_present = true,
81 };
82
83 static struct quirk_entry quirk_dell_latitude_7520 = {
84 .kbd_missing_ac_tag = true,
85 };
86
87 static struct platform_driver platform_driver = {
88 .driver = {
89 .name = "dell-laptop",
90 }
91 };
92
93 static struct platform_device *platform_device;
94 static struct backlight_device *dell_backlight_device;
95 static struct rfkill *wifi_rfkill;
96 static struct rfkill *bluetooth_rfkill;
97 static struct rfkill *wwan_rfkill;
98 static bool force_rfkill;
99 static bool micmute_led_registered;
100 static bool mute_led_registered;
101
102 module_param(force_rfkill, bool, 0444);
103 MODULE_PARM_DESC(force_rfkill, "enable rfkill on non whitelisted models");
104
105 static const struct dmi_system_id dell_device_table[] __initconst = {
106 {
107 .ident = "Dell laptop",
108 .matches = {
109 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
110 DMI_MATCH(DMI_CHASSIS_TYPE, "8"),
111 },
112 },
113 {
114 .matches = {
115 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
116 DMI_MATCH(DMI_CHASSIS_TYPE, "9"), /*Laptop*/
117 },
118 },
119 {
120 .matches = {
121 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
122 DMI_MATCH(DMI_CHASSIS_TYPE, "10"), /*Notebook*/
123 },
124 },
125 {
126 .matches = {
127 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
128 DMI_MATCH(DMI_CHASSIS_TYPE, "30"), /*Tablet*/
129 },
130 },
131 {
132 .matches = {
133 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
134 DMI_MATCH(DMI_CHASSIS_TYPE, "31"), /*Convertible*/
135 },
136 },
137 {
138 .matches = {
139 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
140 DMI_MATCH(DMI_CHASSIS_TYPE, "32"), /*Detachable*/
141 },
142 },
143 {
144 .ident = "Dell Computer Corporation",
145 .matches = {
146 DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer Corporation"),
147 DMI_MATCH(DMI_CHASSIS_TYPE, "8"),
148 },
149 },
150 { }
151 };
152 MODULE_DEVICE_TABLE(dmi, dell_device_table);
153
154 static const struct dmi_system_id dell_quirks[] __initconst = {
155 {
156 .callback = dmi_matched,
157 .ident = "Dell Vostro V130",
158 .matches = {
159 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
160 DMI_MATCH(DMI_PRODUCT_NAME, "Vostro V130"),
161 },
162 .driver_data = &quirk_dell_vostro_v130,
163 },
164 {
165 .callback = dmi_matched,
166 .ident = "Dell Vostro V131",
167 .matches = {
168 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
169 DMI_MATCH(DMI_PRODUCT_NAME, "Vostro V131"),
170 },
171 .driver_data = &quirk_dell_vostro_v130,
172 },
173 {
174 .callback = dmi_matched,
175 .ident = "Dell Vostro 3350",
176 .matches = {
177 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
178 DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 3350"),
179 },
180 .driver_data = &quirk_dell_vostro_v130,
181 },
182 {
183 .callback = dmi_matched,
184 .ident = "Dell Vostro 3555",
185 .matches = {
186 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
187 DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 3555"),
188 },
189 .driver_data = &quirk_dell_vostro_v130,
190 },
191 {
192 .callback = dmi_matched,
193 .ident = "Dell Inspiron N311z",
194 .matches = {
195 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
196 DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron N311z"),
197 },
198 .driver_data = &quirk_dell_vostro_v130,
199 },
200 {
201 .callback = dmi_matched,
202 .ident = "Dell Inspiron M5110",
203 .matches = {
204 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
205 DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron M5110"),
206 },
207 .driver_data = &quirk_dell_vostro_v130,
208 },
209 {
210 .callback = dmi_matched,
211 .ident = "Dell Vostro 3360",
212 .matches = {
213 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
214 DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 3360"),
215 },
216 .driver_data = &quirk_dell_vostro_v130,
217 },
218 {
219 .callback = dmi_matched,
220 .ident = "Dell Vostro 3460",
221 .matches = {
222 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
223 DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 3460"),
224 },
225 .driver_data = &quirk_dell_vostro_v130,
226 },
227 {
228 .callback = dmi_matched,
229 .ident = "Dell Vostro 3560",
230 .matches = {
231 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
232 DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 3560"),
233 },
234 .driver_data = &quirk_dell_vostro_v130,
235 },
236 {
237 .callback = dmi_matched,
238 .ident = "Dell Vostro 3450",
239 .matches = {
240 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
241 DMI_MATCH(DMI_PRODUCT_NAME, "Dell System Vostro 3450"),
242 },
243 .driver_data = &quirk_dell_vostro_v130,
244 },
245 {
246 .callback = dmi_matched,
247 .ident = "Dell Inspiron 5420",
248 .matches = {
249 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
250 DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 5420"),
251 },
252 .driver_data = &quirk_dell_vostro_v130,
253 },
254 {
255 .callback = dmi_matched,
256 .ident = "Dell Inspiron 5520",
257 .matches = {
258 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
259 DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 5520"),
260 },
261 .driver_data = &quirk_dell_vostro_v130,
262 },
263 {
264 .callback = dmi_matched,
265 .ident = "Dell Inspiron 5720",
266 .matches = {
267 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
268 DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 5720"),
269 },
270 .driver_data = &quirk_dell_vostro_v130,
271 },
272 {
273 .callback = dmi_matched,
274 .ident = "Dell Inspiron 7420",
275 .matches = {
276 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
277 DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 7420"),
278 },
279 .driver_data = &quirk_dell_vostro_v130,
280 },
281 {
282 .callback = dmi_matched,
283 .ident = "Dell Inspiron 7520",
284 .matches = {
285 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
286 DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 7520"),
287 },
288 .driver_data = &quirk_dell_vostro_v130,
289 },
290 {
291 .callback = dmi_matched,
292 .ident = "Dell Inspiron 7720",
293 .matches = {
294 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
295 DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 7720"),
296 },
297 .driver_data = &quirk_dell_vostro_v130,
298 },
299 {
300 .callback = dmi_matched,
301 .ident = "Dell XPS13 9333",
302 .matches = {
303 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
304 DMI_MATCH(DMI_PRODUCT_NAME, "XPS13 9333"),
305 },
306 .driver_data = &quirk_dell_xps13_9333,
307 },
308 {
309 .callback = dmi_matched,
310 .ident = "Dell XPS 13 9370",
311 .matches = {
312 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
313 DMI_MATCH(DMI_PRODUCT_NAME, "XPS 13 9370"),
314 },
315 .driver_data = &quirk_dell_xps13_9370,
316 },
317 {
318 .callback = dmi_matched,
319 .ident = "Dell Latitude E6410",
320 .matches = {
321 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
322 DMI_MATCH(DMI_PRODUCT_NAME, "Latitude E6410"),
323 },
324 .driver_data = &quirk_dell_latitude_e6410,
325 },
326 {
327 .callback = dmi_matched,
328 .ident = "Dell Inspiron 1012",
329 .matches = {
330 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
331 DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 1012"),
332 },
333 .driver_data = &quirk_dell_inspiron_1012,
334 },
335 {
336 .callback = dmi_matched,
337 .ident = "Dell Inspiron 1018",
338 .matches = {
339 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
340 DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 1018"),
341 },
342 .driver_data = &quirk_dell_inspiron_1012,
343 },
344 {
345 .callback = dmi_matched,
346 .ident = "Dell Latitude 7520",
347 .matches = {
348 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
349 DMI_MATCH(DMI_PRODUCT_NAME, "Latitude 7520"),
350 },
351 .driver_data = &quirk_dell_latitude_7520,
352 },
353 { }
354 };
355
dell_fill_request(struct calling_interface_buffer * buffer,u32 arg0,u32 arg1,u32 arg2,u32 arg3)356 static void dell_fill_request(struct calling_interface_buffer *buffer,
357 u32 arg0, u32 arg1, u32 arg2, u32 arg3)
358 {
359 memset(buffer, 0, sizeof(struct calling_interface_buffer));
360 buffer->input[0] = arg0;
361 buffer->input[1] = arg1;
362 buffer->input[2] = arg2;
363 buffer->input[3] = arg3;
364 }
365
dell_send_request(struct calling_interface_buffer * buffer,u16 class,u16 select)366 static int dell_send_request(struct calling_interface_buffer *buffer,
367 u16 class, u16 select)
368 {
369 int ret;
370
371 buffer->cmd_class = class;
372 buffer->cmd_select = select;
373 ret = dell_smbios_call(buffer);
374 if (ret != 0)
375 return ret;
376 return dell_smbios_error(buffer->output[0]);
377 }
378
379 /*
380 * Derived from information in smbios-wireless-ctl:
381 *
382 * cbSelect 17, Value 11
383 *
384 * Return Wireless Info
385 * cbArg1, byte0 = 0x00
386 *
387 * cbRes1 Standard return codes (0, -1, -2)
388 * cbRes2 Info bit flags:
389 *
390 * 0 Hardware switch supported (1)
391 * 1 WiFi locator supported (1)
392 * 2 WLAN supported (1)
393 * 3 Bluetooth (BT) supported (1)
394 * 4 WWAN supported (1)
395 * 5 Wireless KBD supported (1)
396 * 6 Uw b supported (1)
397 * 7 WiGig supported (1)
398 * 8 WLAN installed (1)
399 * 9 BT installed (1)
400 * 10 WWAN installed (1)
401 * 11 Uw b installed (1)
402 * 12 WiGig installed (1)
403 * 13-15 Reserved (0)
404 * 16 Hardware (HW) switch is On (1)
405 * 17 WLAN disabled (1)
406 * 18 BT disabled (1)
407 * 19 WWAN disabled (1)
408 * 20 Uw b disabled (1)
409 * 21 WiGig disabled (1)
410 * 20-31 Reserved (0)
411 *
412 * cbRes3 NVRAM size in bytes
413 * cbRes4, byte 0 NVRAM format version number
414 *
415 *
416 * Set QuickSet Radio Disable Flag
417 * cbArg1, byte0 = 0x01
418 * cbArg1, byte1
419 * Radio ID value:
420 * 0 Radio Status
421 * 1 WLAN ID
422 * 2 BT ID
423 * 3 WWAN ID
424 * 4 UWB ID
425 * 5 WIGIG ID
426 * cbArg1, byte2 Flag bits:
427 * 0 QuickSet disables radio (1)
428 * 1-7 Reserved (0)
429 *
430 * cbRes1 Standard return codes (0, -1, -2)
431 * cbRes2 QuickSet (QS) radio disable bit map:
432 * 0 QS disables WLAN
433 * 1 QS disables BT
434 * 2 QS disables WWAN
435 * 3 QS disables UWB
436 * 4 QS disables WIGIG
437 * 5-31 Reserved (0)
438 *
439 * Wireless Switch Configuration
440 * cbArg1, byte0 = 0x02
441 *
442 * cbArg1, byte1
443 * Subcommand:
444 * 0 Get config
445 * 1 Set config
446 * 2 Set WiFi locator enable/disable
447 * cbArg1,byte2
448 * Switch settings (if byte 1==1):
449 * 0 WLAN sw itch control (1)
450 * 1 BT sw itch control (1)
451 * 2 WWAN sw itch control (1)
452 * 3 UWB sw itch control (1)
453 * 4 WiGig sw itch control (1)
454 * 5-7 Reserved (0)
455 * cbArg1, byte2 Enable bits (if byte 1==2):
456 * 0 Enable WiFi locator (1)
457 *
458 * cbRes1 Standard return codes (0, -1, -2)
459 * cbRes2 QuickSet radio disable bit map:
460 * 0 WLAN controlled by sw itch (1)
461 * 1 BT controlled by sw itch (1)
462 * 2 WWAN controlled by sw itch (1)
463 * 3 UWB controlled by sw itch (1)
464 * 4 WiGig controlled by sw itch (1)
465 * 5-6 Reserved (0)
466 * 7 Wireless sw itch config locked (1)
467 * 8 WiFi locator enabled (1)
468 * 9-14 Reserved (0)
469 * 15 WiFi locator setting locked (1)
470 * 16-31 Reserved (0)
471 *
472 * Read Local Config Data (LCD)
473 * cbArg1, byte0 = 0x10
474 * cbArg1, byte1 NVRAM index low byte
475 * cbArg1, byte2 NVRAM index high byte
476 * cbRes1 Standard return codes (0, -1, -2)
477 * cbRes2 4 bytes read from LCD[index]
478 * cbRes3 4 bytes read from LCD[index+4]
479 * cbRes4 4 bytes read from LCD[index+8]
480 *
481 * Write Local Config Data (LCD)
482 * cbArg1, byte0 = 0x11
483 * cbArg1, byte1 NVRAM index low byte
484 * cbArg1, byte2 NVRAM index high byte
485 * cbArg2 4 bytes to w rite at LCD[index]
486 * cbArg3 4 bytes to w rite at LCD[index+4]
487 * cbArg4 4 bytes to w rite at LCD[index+8]
488 * cbRes1 Standard return codes (0, -1, -2)
489 *
490 * Populate Local Config Data from NVRAM
491 * cbArg1, byte0 = 0x12
492 * cbRes1 Standard return codes (0, -1, -2)
493 *
494 * Commit Local Config Data to NVRAM
495 * cbArg1, byte0 = 0x13
496 * cbRes1 Standard return codes (0, -1, -2)
497 */
498
dell_rfkill_set(void * data,bool blocked)499 static int dell_rfkill_set(void *data, bool blocked)
500 {
501 int disable = blocked ? 1 : 0;
502 unsigned long radio = (unsigned long)data;
503 int hwswitch_bit = (unsigned long)data - 1;
504 struct calling_interface_buffer buffer;
505 int hwswitch;
506 int status;
507 int ret;
508
509 dell_fill_request(&buffer, 0, 0, 0, 0);
510 ret = dell_send_request(&buffer, CLASS_INFO, SELECT_RFKILL);
511 if (ret)
512 return ret;
513 status = buffer.output[1];
514
515 dell_fill_request(&buffer, 0x2, 0, 0, 0);
516 ret = dell_send_request(&buffer, CLASS_INFO, SELECT_RFKILL);
517 if (ret)
518 return ret;
519 hwswitch = buffer.output[1];
520
521 /* If the hardware switch controls this radio, and the hardware
522 switch is disabled, always disable the radio */
523 if (ret == 0 && (hwswitch & BIT(hwswitch_bit)) &&
524 (status & BIT(0)) && !(status & BIT(16)))
525 disable = 1;
526
527 dell_fill_request(&buffer, 1 | (radio<<8) | (disable << 16), 0, 0, 0);
528 ret = dell_send_request(&buffer, CLASS_INFO, SELECT_RFKILL);
529 return ret;
530 }
531
dell_rfkill_update_sw_state(struct rfkill * rfkill,int radio,int status)532 static void dell_rfkill_update_sw_state(struct rfkill *rfkill, int radio,
533 int status)
534 {
535 if (status & BIT(0)) {
536 /* Has hw-switch, sync sw_state to BIOS */
537 struct calling_interface_buffer buffer;
538 int block = rfkill_blocked(rfkill);
539 dell_fill_request(&buffer,
540 1 | (radio << 8) | (block << 16), 0, 0, 0);
541 dell_send_request(&buffer, CLASS_INFO, SELECT_RFKILL);
542 } else {
543 /* No hw-switch, sync BIOS state to sw_state */
544 rfkill_set_sw_state(rfkill, !!(status & BIT(radio + 16)));
545 }
546 }
547
dell_rfkill_update_hw_state(struct rfkill * rfkill,int radio,int status,int hwswitch)548 static void dell_rfkill_update_hw_state(struct rfkill *rfkill, int radio,
549 int status, int hwswitch)
550 {
551 if (hwswitch & (BIT(radio - 1)))
552 rfkill_set_hw_state(rfkill, !(status & BIT(16)));
553 }
554
dell_rfkill_query(struct rfkill * rfkill,void * data)555 static void dell_rfkill_query(struct rfkill *rfkill, void *data)
556 {
557 int radio = ((unsigned long)data & 0xF);
558 struct calling_interface_buffer buffer;
559 int hwswitch;
560 int status;
561 int ret;
562
563 dell_fill_request(&buffer, 0, 0, 0, 0);
564 ret = dell_send_request(&buffer, CLASS_INFO, SELECT_RFKILL);
565 status = buffer.output[1];
566
567 if (ret != 0 || !(status & BIT(0))) {
568 return;
569 }
570
571 dell_fill_request(&buffer, 0x2, 0, 0, 0);
572 ret = dell_send_request(&buffer, CLASS_INFO, SELECT_RFKILL);
573 hwswitch = buffer.output[1];
574
575 if (ret != 0)
576 return;
577
578 dell_rfkill_update_hw_state(rfkill, radio, status, hwswitch);
579 }
580
581 static const struct rfkill_ops dell_rfkill_ops = {
582 .set_block = dell_rfkill_set,
583 .query = dell_rfkill_query,
584 };
585
586 static struct dentry *dell_laptop_dir;
587
dell_debugfs_show(struct seq_file * s,void * data)588 static int dell_debugfs_show(struct seq_file *s, void *data)
589 {
590 struct calling_interface_buffer buffer;
591 int hwswitch_state;
592 int hwswitch_ret;
593 int status;
594 int ret;
595
596 dell_fill_request(&buffer, 0, 0, 0, 0);
597 ret = dell_send_request(&buffer, CLASS_INFO, SELECT_RFKILL);
598 if (ret)
599 return ret;
600 status = buffer.output[1];
601
602 dell_fill_request(&buffer, 0x2, 0, 0, 0);
603 hwswitch_ret = dell_send_request(&buffer, CLASS_INFO, SELECT_RFKILL);
604 if (hwswitch_ret)
605 return hwswitch_ret;
606 hwswitch_state = buffer.output[1];
607
608 seq_printf(s, "return:\t%d\n", ret);
609 seq_printf(s, "status:\t0x%X\n", status);
610 seq_printf(s, "Bit 0 : Hardware switch supported: %lu\n",
611 status & BIT(0));
612 seq_printf(s, "Bit 1 : Wifi locator supported: %lu\n",
613 (status & BIT(1)) >> 1);
614 seq_printf(s, "Bit 2 : Wifi is supported: %lu\n",
615 (status & BIT(2)) >> 2);
616 seq_printf(s, "Bit 3 : Bluetooth is supported: %lu\n",
617 (status & BIT(3)) >> 3);
618 seq_printf(s, "Bit 4 : WWAN is supported: %lu\n",
619 (status & BIT(4)) >> 4);
620 seq_printf(s, "Bit 5 : Wireless keyboard supported: %lu\n",
621 (status & BIT(5)) >> 5);
622 seq_printf(s, "Bit 6 : UWB supported: %lu\n",
623 (status & BIT(6)) >> 6);
624 seq_printf(s, "Bit 7 : WiGig supported: %lu\n",
625 (status & BIT(7)) >> 7);
626 seq_printf(s, "Bit 8 : Wifi is installed: %lu\n",
627 (status & BIT(8)) >> 8);
628 seq_printf(s, "Bit 9 : Bluetooth is installed: %lu\n",
629 (status & BIT(9)) >> 9);
630 seq_printf(s, "Bit 10: WWAN is installed: %lu\n",
631 (status & BIT(10)) >> 10);
632 seq_printf(s, "Bit 11: UWB installed: %lu\n",
633 (status & BIT(11)) >> 11);
634 seq_printf(s, "Bit 12: WiGig installed: %lu\n",
635 (status & BIT(12)) >> 12);
636
637 seq_printf(s, "Bit 16: Hardware switch is on: %lu\n",
638 (status & BIT(16)) >> 16);
639 seq_printf(s, "Bit 17: Wifi is blocked: %lu\n",
640 (status & BIT(17)) >> 17);
641 seq_printf(s, "Bit 18: Bluetooth is blocked: %lu\n",
642 (status & BIT(18)) >> 18);
643 seq_printf(s, "Bit 19: WWAN is blocked: %lu\n",
644 (status & BIT(19)) >> 19);
645 seq_printf(s, "Bit 20: UWB is blocked: %lu\n",
646 (status & BIT(20)) >> 20);
647 seq_printf(s, "Bit 21: WiGig is blocked: %lu\n",
648 (status & BIT(21)) >> 21);
649
650 seq_printf(s, "\nhwswitch_return:\t%d\n", hwswitch_ret);
651 seq_printf(s, "hwswitch_state:\t0x%X\n", hwswitch_state);
652 seq_printf(s, "Bit 0 : Wifi controlled by switch: %lu\n",
653 hwswitch_state & BIT(0));
654 seq_printf(s, "Bit 1 : Bluetooth controlled by switch: %lu\n",
655 (hwswitch_state & BIT(1)) >> 1);
656 seq_printf(s, "Bit 2 : WWAN controlled by switch: %lu\n",
657 (hwswitch_state & BIT(2)) >> 2);
658 seq_printf(s, "Bit 3 : UWB controlled by switch: %lu\n",
659 (hwswitch_state & BIT(3)) >> 3);
660 seq_printf(s, "Bit 4 : WiGig controlled by switch: %lu\n",
661 (hwswitch_state & BIT(4)) >> 4);
662 seq_printf(s, "Bit 7 : Wireless switch config locked: %lu\n",
663 (hwswitch_state & BIT(7)) >> 7);
664 seq_printf(s, "Bit 8 : Wifi locator enabled: %lu\n",
665 (hwswitch_state & BIT(8)) >> 8);
666 seq_printf(s, "Bit 15: Wifi locator setting locked: %lu\n",
667 (hwswitch_state & BIT(15)) >> 15);
668
669 return 0;
670 }
671 DEFINE_SHOW_ATTRIBUTE(dell_debugfs);
672
dell_update_rfkill(struct work_struct * ignored)673 static void dell_update_rfkill(struct work_struct *ignored)
674 {
675 struct calling_interface_buffer buffer;
676 int hwswitch = 0;
677 int status;
678 int ret;
679
680 dell_fill_request(&buffer, 0, 0, 0, 0);
681 ret = dell_send_request(&buffer, CLASS_INFO, SELECT_RFKILL);
682 status = buffer.output[1];
683
684 if (ret != 0)
685 return;
686
687 dell_fill_request(&buffer, 0x2, 0, 0, 0);
688 ret = dell_send_request(&buffer, CLASS_INFO, SELECT_RFKILL);
689
690 if (ret == 0 && (status & BIT(0)))
691 hwswitch = buffer.output[1];
692
693 if (wifi_rfkill) {
694 dell_rfkill_update_hw_state(wifi_rfkill, 1, status, hwswitch);
695 dell_rfkill_update_sw_state(wifi_rfkill, 1, status);
696 }
697 if (bluetooth_rfkill) {
698 dell_rfkill_update_hw_state(bluetooth_rfkill, 2, status,
699 hwswitch);
700 dell_rfkill_update_sw_state(bluetooth_rfkill, 2, status);
701 }
702 if (wwan_rfkill) {
703 dell_rfkill_update_hw_state(wwan_rfkill, 3, status, hwswitch);
704 dell_rfkill_update_sw_state(wwan_rfkill, 3, status);
705 }
706 }
707 static DECLARE_DELAYED_WORK(dell_rfkill_work, dell_update_rfkill);
708
dell_laptop_i8042_filter(unsigned char data,unsigned char str,struct serio * port)709 static bool dell_laptop_i8042_filter(unsigned char data, unsigned char str,
710 struct serio *port)
711 {
712 static bool extended;
713
714 if (str & I8042_STR_AUXDATA)
715 return false;
716
717 if (unlikely(data == 0xe0)) {
718 extended = true;
719 return false;
720 } else if (unlikely(extended)) {
721 switch (data) {
722 case 0x8:
723 schedule_delayed_work(&dell_rfkill_work,
724 round_jiffies_relative(HZ / 4));
725 break;
726 }
727 extended = false;
728 }
729
730 return false;
731 }
732
733 static int (*dell_rbtn_notifier_register_func)(struct notifier_block *);
734 static int (*dell_rbtn_notifier_unregister_func)(struct notifier_block *);
735
dell_laptop_rbtn_notifier_call(struct notifier_block * nb,unsigned long action,void * data)736 static int dell_laptop_rbtn_notifier_call(struct notifier_block *nb,
737 unsigned long action, void *data)
738 {
739 schedule_delayed_work(&dell_rfkill_work, 0);
740 return NOTIFY_OK;
741 }
742
743 static struct notifier_block dell_laptop_rbtn_notifier = {
744 .notifier_call = dell_laptop_rbtn_notifier_call,
745 };
746
dell_setup_rfkill(void)747 static int __init dell_setup_rfkill(void)
748 {
749 struct calling_interface_buffer buffer;
750 int status, ret, whitelisted;
751 const char *product;
752
753 /*
754 * rfkill support causes trouble on various models, mostly Inspirons.
755 * So we whitelist certain series, and don't support rfkill on others.
756 */
757 whitelisted = 0;
758 product = dmi_get_system_info(DMI_PRODUCT_NAME);
759 if (product && (strncmp(product, "Latitude", 8) == 0 ||
760 strncmp(product, "Precision", 9) == 0))
761 whitelisted = 1;
762 if (!force_rfkill && !whitelisted)
763 return 0;
764
765 dell_fill_request(&buffer, 0, 0, 0, 0);
766 ret = dell_send_request(&buffer, CLASS_INFO, SELECT_RFKILL);
767 status = buffer.output[1];
768
769 /* dell wireless info smbios call is not supported */
770 if (ret != 0)
771 return 0;
772
773 /* rfkill is only tested on laptops with a hwswitch */
774 if (!(status & BIT(0)) && !force_rfkill)
775 return 0;
776
777 if ((status & (1<<2|1<<8)) == (1<<2|1<<8)) {
778 wifi_rfkill = rfkill_alloc("dell-wifi", &platform_device->dev,
779 RFKILL_TYPE_WLAN,
780 &dell_rfkill_ops, (void *) 1);
781 if (!wifi_rfkill) {
782 ret = -ENOMEM;
783 goto err_wifi;
784 }
785 ret = rfkill_register(wifi_rfkill);
786 if (ret)
787 goto err_wifi;
788 }
789
790 if ((status & (1<<3|1<<9)) == (1<<3|1<<9)) {
791 bluetooth_rfkill = rfkill_alloc("dell-bluetooth",
792 &platform_device->dev,
793 RFKILL_TYPE_BLUETOOTH,
794 &dell_rfkill_ops, (void *) 2);
795 if (!bluetooth_rfkill) {
796 ret = -ENOMEM;
797 goto err_bluetooth;
798 }
799 ret = rfkill_register(bluetooth_rfkill);
800 if (ret)
801 goto err_bluetooth;
802 }
803
804 if ((status & (1<<4|1<<10)) == (1<<4|1<<10)) {
805 wwan_rfkill = rfkill_alloc("dell-wwan",
806 &platform_device->dev,
807 RFKILL_TYPE_WWAN,
808 &dell_rfkill_ops, (void *) 3);
809 if (!wwan_rfkill) {
810 ret = -ENOMEM;
811 goto err_wwan;
812 }
813 ret = rfkill_register(wwan_rfkill);
814 if (ret)
815 goto err_wwan;
816 }
817
818 /*
819 * Dell Airplane Mode Switch driver (dell-rbtn) supports ACPI devices
820 * which can receive events from HW slider switch.
821 *
822 * Dell SMBIOS on whitelisted models supports controlling radio devices
823 * but does not support receiving HW button switch events. We can use
824 * i8042 filter hook function to receive keyboard data and handle
825 * keycode for HW button.
826 *
827 * So if it is possible we will use Dell Airplane Mode Switch ACPI
828 * driver for receiving HW events and Dell SMBIOS for setting rfkill
829 * states. If ACPI driver or device is not available we will fallback to
830 * i8042 filter hook function.
831 *
832 * To prevent duplicate rfkill devices which control and do same thing,
833 * dell-rbtn driver will automatically remove its own rfkill devices
834 * once function dell_rbtn_notifier_register() is called.
835 */
836
837 dell_rbtn_notifier_register_func =
838 symbol_request(dell_rbtn_notifier_register);
839 if (dell_rbtn_notifier_register_func) {
840 dell_rbtn_notifier_unregister_func =
841 symbol_request(dell_rbtn_notifier_unregister);
842 if (!dell_rbtn_notifier_unregister_func) {
843 symbol_put(dell_rbtn_notifier_register);
844 dell_rbtn_notifier_register_func = NULL;
845 }
846 }
847
848 if (dell_rbtn_notifier_register_func) {
849 ret = dell_rbtn_notifier_register_func(
850 &dell_laptop_rbtn_notifier);
851 symbol_put(dell_rbtn_notifier_register);
852 dell_rbtn_notifier_register_func = NULL;
853 if (ret != 0) {
854 symbol_put(dell_rbtn_notifier_unregister);
855 dell_rbtn_notifier_unregister_func = NULL;
856 }
857 } else {
858 pr_info("Symbols from dell-rbtn acpi driver are not available\n");
859 ret = -ENODEV;
860 }
861
862 if (ret == 0) {
863 pr_info("Using dell-rbtn acpi driver for receiving events\n");
864 } else if (ret != -ENODEV) {
865 pr_warn("Unable to register dell rbtn notifier\n");
866 goto err_filter;
867 } else {
868 ret = i8042_install_filter(dell_laptop_i8042_filter);
869 if (ret) {
870 pr_warn("Unable to install key filter\n");
871 goto err_filter;
872 }
873 pr_info("Using i8042 filter function for receiving events\n");
874 }
875
876 return 0;
877 err_filter:
878 if (wwan_rfkill)
879 rfkill_unregister(wwan_rfkill);
880 err_wwan:
881 rfkill_destroy(wwan_rfkill);
882 if (bluetooth_rfkill)
883 rfkill_unregister(bluetooth_rfkill);
884 err_bluetooth:
885 rfkill_destroy(bluetooth_rfkill);
886 if (wifi_rfkill)
887 rfkill_unregister(wifi_rfkill);
888 err_wifi:
889 rfkill_destroy(wifi_rfkill);
890
891 return ret;
892 }
893
dell_cleanup_rfkill(void)894 static void dell_cleanup_rfkill(void)
895 {
896 if (dell_rbtn_notifier_unregister_func) {
897 dell_rbtn_notifier_unregister_func(&dell_laptop_rbtn_notifier);
898 symbol_put(dell_rbtn_notifier_unregister);
899 dell_rbtn_notifier_unregister_func = NULL;
900 } else {
901 i8042_remove_filter(dell_laptop_i8042_filter);
902 }
903 cancel_delayed_work_sync(&dell_rfkill_work);
904 if (wifi_rfkill) {
905 rfkill_unregister(wifi_rfkill);
906 rfkill_destroy(wifi_rfkill);
907 }
908 if (bluetooth_rfkill) {
909 rfkill_unregister(bluetooth_rfkill);
910 rfkill_destroy(bluetooth_rfkill);
911 }
912 if (wwan_rfkill) {
913 rfkill_unregister(wwan_rfkill);
914 rfkill_destroy(wwan_rfkill);
915 }
916 }
917
dell_send_intensity(struct backlight_device * bd)918 static int dell_send_intensity(struct backlight_device *bd)
919 {
920 struct calling_interface_buffer buffer;
921 struct calling_interface_token *token;
922 int ret;
923
924 token = dell_smbios_find_token(BRIGHTNESS_TOKEN);
925 if (!token)
926 return -ENODEV;
927
928 dell_fill_request(&buffer,
929 token->location, bd->props.brightness, 0, 0);
930 if (power_supply_is_system_supplied() > 0)
931 ret = dell_send_request(&buffer,
932 CLASS_TOKEN_WRITE, SELECT_TOKEN_AC);
933 else
934 ret = dell_send_request(&buffer,
935 CLASS_TOKEN_WRITE, SELECT_TOKEN_BAT);
936
937 return ret;
938 }
939
dell_get_intensity(struct backlight_device * bd)940 static int dell_get_intensity(struct backlight_device *bd)
941 {
942 struct calling_interface_buffer buffer;
943 struct calling_interface_token *token;
944 int ret;
945
946 token = dell_smbios_find_token(BRIGHTNESS_TOKEN);
947 if (!token)
948 return -ENODEV;
949
950 dell_fill_request(&buffer, token->location, 0, 0, 0);
951 if (power_supply_is_system_supplied() > 0)
952 ret = dell_send_request(&buffer,
953 CLASS_TOKEN_READ, SELECT_TOKEN_AC);
954 else
955 ret = dell_send_request(&buffer,
956 CLASS_TOKEN_READ, SELECT_TOKEN_BAT);
957
958 if (ret == 0)
959 ret = buffer.output[1];
960
961 return ret;
962 }
963
964 static const struct backlight_ops dell_ops = {
965 .get_brightness = dell_get_intensity,
966 .update_status = dell_send_intensity,
967 };
968
touchpad_led_on(void)969 static void touchpad_led_on(void)
970 {
971 int command = 0x97;
972 char data = 1;
973 i8042_command(&data, command | 1 << 12);
974 }
975
touchpad_led_off(void)976 static void touchpad_led_off(void)
977 {
978 int command = 0x97;
979 char data = 2;
980 i8042_command(&data, command | 1 << 12);
981 }
982
touchpad_led_set(struct led_classdev * led_cdev,enum led_brightness value)983 static void touchpad_led_set(struct led_classdev *led_cdev,
984 enum led_brightness value)
985 {
986 if (value > 0)
987 touchpad_led_on();
988 else
989 touchpad_led_off();
990 }
991
992 static struct led_classdev touchpad_led = {
993 .name = "dell-laptop::touchpad",
994 .brightness_set = touchpad_led_set,
995 .flags = LED_CORE_SUSPENDRESUME,
996 };
997
touchpad_led_init(struct device * dev)998 static int __init touchpad_led_init(struct device *dev)
999 {
1000 return led_classdev_register(dev, &touchpad_led);
1001 }
1002
touchpad_led_exit(void)1003 static void touchpad_led_exit(void)
1004 {
1005 led_classdev_unregister(&touchpad_led);
1006 }
1007
1008 /*
1009 * Derived from information in smbios-keyboard-ctl:
1010 *
1011 * cbClass 4
1012 * cbSelect 11
1013 * Keyboard illumination
1014 * cbArg1 determines the function to be performed
1015 *
1016 * cbArg1 0x0 = Get Feature Information
1017 * cbRES1 Standard return codes (0, -1, -2)
1018 * cbRES2, word0 Bitmap of user-selectable modes
1019 * bit 0 Always off (All systems)
1020 * bit 1 Always on (Travis ATG, Siberia)
1021 * bit 2 Auto: ALS-based On; ALS-based Off (Travis ATG)
1022 * bit 3 Auto: ALS- and input-activity-based On; input-activity based Off
1023 * bit 4 Auto: Input-activity-based On; input-activity based Off
1024 * bit 5 Auto: Input-activity-based On (illumination level 25%); input-activity based Off
1025 * bit 6 Auto: Input-activity-based On (illumination level 50%); input-activity based Off
1026 * bit 7 Auto: Input-activity-based On (illumination level 75%); input-activity based Off
1027 * bit 8 Auto: Input-activity-based On (illumination level 100%); input-activity based Off
1028 * bits 9-15 Reserved for future use
1029 * cbRES2, byte2 Reserved for future use
1030 * cbRES2, byte3 Keyboard illumination type
1031 * 0 Reserved
1032 * 1 Tasklight
1033 * 2 Backlight
1034 * 3-255 Reserved for future use
1035 * cbRES3, byte0 Supported auto keyboard illumination trigger bitmap.
1036 * bit 0 Any keystroke
1037 * bit 1 Touchpad activity
1038 * bit 2 Pointing stick
1039 * bit 3 Any mouse
1040 * bits 4-7 Reserved for future use
1041 * cbRES3, byte1 Supported timeout unit bitmap
1042 * bit 0 Seconds
1043 * bit 1 Minutes
1044 * bit 2 Hours
1045 * bit 3 Days
1046 * bits 4-7 Reserved for future use
1047 * cbRES3, byte2 Number of keyboard light brightness levels
1048 * cbRES4, byte0 Maximum acceptable seconds value (0 if seconds not supported).
1049 * cbRES4, byte1 Maximum acceptable minutes value (0 if minutes not supported).
1050 * cbRES4, byte2 Maximum acceptable hours value (0 if hours not supported).
1051 * cbRES4, byte3 Maximum acceptable days value (0 if days not supported)
1052 *
1053 * cbArg1 0x1 = Get Current State
1054 * cbRES1 Standard return codes (0, -1, -2)
1055 * cbRES2, word0 Bitmap of current mode state
1056 * bit 0 Always off (All systems)
1057 * bit 1 Always on (Travis ATG, Siberia)
1058 * bit 2 Auto: ALS-based On; ALS-based Off (Travis ATG)
1059 * bit 3 Auto: ALS- and input-activity-based On; input-activity based Off
1060 * bit 4 Auto: Input-activity-based On; input-activity based Off
1061 * bit 5 Auto: Input-activity-based On (illumination level 25%); input-activity based Off
1062 * bit 6 Auto: Input-activity-based On (illumination level 50%); input-activity based Off
1063 * bit 7 Auto: Input-activity-based On (illumination level 75%); input-activity based Off
1064 * bit 8 Auto: Input-activity-based On (illumination level 100%); input-activity based Off
1065 * bits 9-15 Reserved for future use
1066 * Note: Only One bit can be set
1067 * cbRES2, byte2 Currently active auto keyboard illumination triggers.
1068 * bit 0 Any keystroke
1069 * bit 1 Touchpad activity
1070 * bit 2 Pointing stick
1071 * bit 3 Any mouse
1072 * bits 4-7 Reserved for future use
1073 * cbRES2, byte3 Current Timeout on battery
1074 * bits 7:6 Timeout units indicator:
1075 * 00b Seconds
1076 * 01b Minutes
1077 * 10b Hours
1078 * 11b Days
1079 * bits 5:0 Timeout value (0-63) in sec/min/hr/day
1080 * NOTE: A value of 0 means always on (no timeout) if any bits of RES3 byte
1081 * are set upon return from the [Get feature information] call.
1082 * cbRES3, byte0 Current setting of ALS value that turns the light on or off.
1083 * cbRES3, byte1 Current ALS reading
1084 * cbRES3, byte2 Current keyboard light level.
1085 * cbRES3, byte3 Current timeout on AC Power
1086 * bits 7:6 Timeout units indicator:
1087 * 00b Seconds
1088 * 01b Minutes
1089 * 10b Hours
1090 * 11b Days
1091 * Bits 5:0 Timeout value (0-63) in sec/min/hr/day
1092 * NOTE: A value of 0 means always on (no timeout) if any bits of RES3 byte2
1093 * are set upon return from the upon return from the [Get Feature information] call.
1094 *
1095 * cbArg1 0x2 = Set New State
1096 * cbRES1 Standard return codes (0, -1, -2)
1097 * cbArg2, word0 Bitmap of current mode state
1098 * bit 0 Always off (All systems)
1099 * bit 1 Always on (Travis ATG, Siberia)
1100 * bit 2 Auto: ALS-based On; ALS-based Off (Travis ATG)
1101 * bit 3 Auto: ALS- and input-activity-based On; input-activity based Off
1102 * bit 4 Auto: Input-activity-based On; input-activity based Off
1103 * bit 5 Auto: Input-activity-based On (illumination level 25%); input-activity based Off
1104 * bit 6 Auto: Input-activity-based On (illumination level 50%); input-activity based Off
1105 * bit 7 Auto: Input-activity-based On (illumination level 75%); input-activity based Off
1106 * bit 8 Auto: Input-activity-based On (illumination level 100%); input-activity based Off
1107 * bits 9-15 Reserved for future use
1108 * Note: Only One bit can be set
1109 * cbArg2, byte2 Desired auto keyboard illumination triggers. Must remain inactive to allow
1110 * keyboard to turn off automatically.
1111 * bit 0 Any keystroke
1112 * bit 1 Touchpad activity
1113 * bit 2 Pointing stick
1114 * bit 3 Any mouse
1115 * bits 4-7 Reserved for future use
1116 * cbArg2, byte3 Desired Timeout on battery
1117 * bits 7:6 Timeout units indicator:
1118 * 00b Seconds
1119 * 01b Minutes
1120 * 10b Hours
1121 * 11b Days
1122 * bits 5:0 Timeout value (0-63) in sec/min/hr/day
1123 * cbArg3, byte0 Desired setting of ALS value that turns the light on or off.
1124 * cbArg3, byte2 Desired keyboard light level.
1125 * cbArg3, byte3 Desired Timeout on AC power
1126 * bits 7:6 Timeout units indicator:
1127 * 00b Seconds
1128 * 01b Minutes
1129 * 10b Hours
1130 * 11b Days
1131 * bits 5:0 Timeout value (0-63) in sec/min/hr/day
1132 */
1133
1134
1135 enum kbd_timeout_unit {
1136 KBD_TIMEOUT_SECONDS = 0,
1137 KBD_TIMEOUT_MINUTES,
1138 KBD_TIMEOUT_HOURS,
1139 KBD_TIMEOUT_DAYS,
1140 };
1141
1142 enum kbd_mode_bit {
1143 KBD_MODE_BIT_OFF = 0,
1144 KBD_MODE_BIT_ON,
1145 KBD_MODE_BIT_ALS,
1146 KBD_MODE_BIT_TRIGGER_ALS,
1147 KBD_MODE_BIT_TRIGGER,
1148 KBD_MODE_BIT_TRIGGER_25,
1149 KBD_MODE_BIT_TRIGGER_50,
1150 KBD_MODE_BIT_TRIGGER_75,
1151 KBD_MODE_BIT_TRIGGER_100,
1152 };
1153
1154 #define kbd_is_als_mode_bit(bit) \
1155 ((bit) == KBD_MODE_BIT_ALS || (bit) == KBD_MODE_BIT_TRIGGER_ALS)
1156 #define kbd_is_trigger_mode_bit(bit) \
1157 ((bit) >= KBD_MODE_BIT_TRIGGER_ALS && (bit) <= KBD_MODE_BIT_TRIGGER_100)
1158 #define kbd_is_level_mode_bit(bit) \
1159 ((bit) >= KBD_MODE_BIT_TRIGGER_25 && (bit) <= KBD_MODE_BIT_TRIGGER_100)
1160
1161 struct kbd_info {
1162 u16 modes;
1163 u8 type;
1164 u8 triggers;
1165 u8 levels;
1166 u8 seconds;
1167 u8 minutes;
1168 u8 hours;
1169 u8 days;
1170 };
1171
1172 struct kbd_state {
1173 u8 mode_bit;
1174 u8 triggers;
1175 u8 timeout_value;
1176 u8 timeout_unit;
1177 u8 timeout_value_ac;
1178 u8 timeout_unit_ac;
1179 u8 als_setting;
1180 u8 als_value;
1181 u8 level;
1182 };
1183
1184 static const int kbd_tokens[] = {
1185 KBD_LED_OFF_TOKEN,
1186 KBD_LED_AUTO_25_TOKEN,
1187 KBD_LED_AUTO_50_TOKEN,
1188 KBD_LED_AUTO_75_TOKEN,
1189 KBD_LED_AUTO_100_TOKEN,
1190 KBD_LED_ON_TOKEN,
1191 };
1192
1193 static u16 kbd_token_bits;
1194
1195 static struct kbd_info kbd_info;
1196 static bool kbd_als_supported;
1197 static bool kbd_triggers_supported;
1198 static bool kbd_timeout_ac_supported;
1199
1200 static u8 kbd_mode_levels[16];
1201 static int kbd_mode_levels_count;
1202
1203 static u8 kbd_previous_level;
1204 static u8 kbd_previous_mode_bit;
1205
1206 static bool kbd_led_present;
1207 static DEFINE_MUTEX(kbd_led_mutex);
1208 static enum led_brightness kbd_led_level;
1209
1210 /*
1211 * NOTE: there are three ways to set the keyboard backlight level.
1212 * First, via kbd_state.mode_bit (assigning KBD_MODE_BIT_TRIGGER_* value).
1213 * Second, via kbd_state.level (assigning numerical value <= kbd_info.levels).
1214 * Third, via SMBIOS tokens (KBD_LED_* in kbd_tokens)
1215 *
1216 * There are laptops which support only one of these methods. If we want to
1217 * support as many machines as possible we need to implement all three methods.
1218 * The first two methods use the kbd_state structure. The third uses SMBIOS
1219 * tokens. If kbd_info.levels == 0, the machine does not support setting the
1220 * keyboard backlight level via kbd_state.level.
1221 */
1222
kbd_get_info(struct kbd_info * info)1223 static int kbd_get_info(struct kbd_info *info)
1224 {
1225 struct calling_interface_buffer buffer;
1226 u8 units;
1227 int ret;
1228
1229 dell_fill_request(&buffer, 0, 0, 0, 0);
1230 ret = dell_send_request(&buffer,
1231 CLASS_KBD_BACKLIGHT, SELECT_KBD_BACKLIGHT);
1232 if (ret)
1233 return ret;
1234
1235 info->modes = buffer.output[1] & 0xFFFF;
1236 info->type = (buffer.output[1] >> 24) & 0xFF;
1237 info->triggers = buffer.output[2] & 0xFF;
1238 units = (buffer.output[2] >> 8) & 0xFF;
1239 info->levels = (buffer.output[2] >> 16) & 0xFF;
1240
1241 if (quirks && quirks->kbd_led_levels_off_1 && info->levels)
1242 info->levels--;
1243
1244 if (units & BIT(0))
1245 info->seconds = (buffer.output[3] >> 0) & 0xFF;
1246 if (units & BIT(1))
1247 info->minutes = (buffer.output[3] >> 8) & 0xFF;
1248 if (units & BIT(2))
1249 info->hours = (buffer.output[3] >> 16) & 0xFF;
1250 if (units & BIT(3))
1251 info->days = (buffer.output[3] >> 24) & 0xFF;
1252
1253 return ret;
1254 }
1255
kbd_get_max_level(void)1256 static unsigned int kbd_get_max_level(void)
1257 {
1258 if (kbd_info.levels != 0)
1259 return kbd_info.levels;
1260 if (kbd_mode_levels_count > 0)
1261 return kbd_mode_levels_count - 1;
1262 return 0;
1263 }
1264
kbd_get_level(struct kbd_state * state)1265 static int kbd_get_level(struct kbd_state *state)
1266 {
1267 int i;
1268
1269 if (kbd_info.levels != 0)
1270 return state->level;
1271
1272 if (kbd_mode_levels_count > 0) {
1273 for (i = 0; i < kbd_mode_levels_count; ++i)
1274 if (kbd_mode_levels[i] == state->mode_bit)
1275 return i;
1276 return 0;
1277 }
1278
1279 return -EINVAL;
1280 }
1281
kbd_set_level(struct kbd_state * state,u8 level)1282 static int kbd_set_level(struct kbd_state *state, u8 level)
1283 {
1284 if (kbd_info.levels != 0) {
1285 if (level != 0)
1286 kbd_previous_level = level;
1287 if (state->level == level)
1288 return 0;
1289 state->level = level;
1290 if (level != 0 && state->mode_bit == KBD_MODE_BIT_OFF)
1291 state->mode_bit = kbd_previous_mode_bit;
1292 else if (level == 0 && state->mode_bit != KBD_MODE_BIT_OFF) {
1293 kbd_previous_mode_bit = state->mode_bit;
1294 state->mode_bit = KBD_MODE_BIT_OFF;
1295 }
1296 return 0;
1297 }
1298
1299 if (kbd_mode_levels_count > 0 && level < kbd_mode_levels_count) {
1300 if (level != 0)
1301 kbd_previous_level = level;
1302 state->mode_bit = kbd_mode_levels[level];
1303 return 0;
1304 }
1305
1306 return -EINVAL;
1307 }
1308
kbd_get_state(struct kbd_state * state)1309 static int kbd_get_state(struct kbd_state *state)
1310 {
1311 struct calling_interface_buffer buffer;
1312 int ret;
1313
1314 dell_fill_request(&buffer, 0x1, 0, 0, 0);
1315 ret = dell_send_request(&buffer,
1316 CLASS_KBD_BACKLIGHT, SELECT_KBD_BACKLIGHT);
1317 if (ret)
1318 return ret;
1319
1320 state->mode_bit = ffs(buffer.output[1] & 0xFFFF);
1321 if (state->mode_bit != 0)
1322 state->mode_bit--;
1323
1324 state->triggers = (buffer.output[1] >> 16) & 0xFF;
1325 state->timeout_value = (buffer.output[1] >> 24) & 0x3F;
1326 state->timeout_unit = (buffer.output[1] >> 30) & 0x3;
1327 state->als_setting = buffer.output[2] & 0xFF;
1328 state->als_value = (buffer.output[2] >> 8) & 0xFF;
1329 state->level = (buffer.output[2] >> 16) & 0xFF;
1330 state->timeout_value_ac = (buffer.output[2] >> 24) & 0x3F;
1331 state->timeout_unit_ac = (buffer.output[2] >> 30) & 0x3;
1332
1333 return ret;
1334 }
1335
kbd_set_state(struct kbd_state * state)1336 static int kbd_set_state(struct kbd_state *state)
1337 {
1338 struct calling_interface_buffer buffer;
1339 int ret;
1340 u32 input1;
1341 u32 input2;
1342
1343 input1 = BIT(state->mode_bit) & 0xFFFF;
1344 input1 |= (state->triggers & 0xFF) << 16;
1345 input1 |= (state->timeout_value & 0x3F) << 24;
1346 input1 |= (state->timeout_unit & 0x3) << 30;
1347 input2 = state->als_setting & 0xFF;
1348 input2 |= (state->level & 0xFF) << 16;
1349 input2 |= (state->timeout_value_ac & 0x3F) << 24;
1350 input2 |= (state->timeout_unit_ac & 0x3) << 30;
1351 dell_fill_request(&buffer, 0x2, input1, input2, 0);
1352 ret = dell_send_request(&buffer,
1353 CLASS_KBD_BACKLIGHT, SELECT_KBD_BACKLIGHT);
1354
1355 return ret;
1356 }
1357
kbd_set_state_safe(struct kbd_state * state,struct kbd_state * old)1358 static int kbd_set_state_safe(struct kbd_state *state, struct kbd_state *old)
1359 {
1360 int ret;
1361
1362 ret = kbd_set_state(state);
1363 if (ret == 0)
1364 return 0;
1365
1366 /*
1367 * When setting the new state fails,try to restore the previous one.
1368 * This is needed on some machines where BIOS sets a default state when
1369 * setting a new state fails. This default state could be all off.
1370 */
1371
1372 if (kbd_set_state(old))
1373 pr_err("Setting old previous keyboard state failed\n");
1374
1375 return ret;
1376 }
1377
kbd_set_token_bit(u8 bit)1378 static int kbd_set_token_bit(u8 bit)
1379 {
1380 struct calling_interface_buffer buffer;
1381 struct calling_interface_token *token;
1382 int ret;
1383
1384 if (bit >= ARRAY_SIZE(kbd_tokens))
1385 return -EINVAL;
1386
1387 token = dell_smbios_find_token(kbd_tokens[bit]);
1388 if (!token)
1389 return -EINVAL;
1390
1391 dell_fill_request(&buffer, token->location, token->value, 0, 0);
1392 ret = dell_send_request(&buffer, CLASS_TOKEN_WRITE, SELECT_TOKEN_STD);
1393
1394 return ret;
1395 }
1396
kbd_get_token_bit(u8 bit)1397 static int kbd_get_token_bit(u8 bit)
1398 {
1399 struct calling_interface_buffer buffer;
1400 struct calling_interface_token *token;
1401 int ret;
1402 int val;
1403
1404 if (bit >= ARRAY_SIZE(kbd_tokens))
1405 return -EINVAL;
1406
1407 token = dell_smbios_find_token(kbd_tokens[bit]);
1408 if (!token)
1409 return -EINVAL;
1410
1411 dell_fill_request(&buffer, token->location, 0, 0, 0);
1412 ret = dell_send_request(&buffer, CLASS_TOKEN_READ, SELECT_TOKEN_STD);
1413 val = buffer.output[1];
1414
1415 if (ret)
1416 return ret;
1417
1418 return (val == token->value);
1419 }
1420
kbd_get_first_active_token_bit(void)1421 static int kbd_get_first_active_token_bit(void)
1422 {
1423 int i;
1424 int ret;
1425
1426 for (i = 0; i < ARRAY_SIZE(kbd_tokens); ++i) {
1427 ret = kbd_get_token_bit(i);
1428 if (ret == 1)
1429 return i;
1430 }
1431
1432 return ret;
1433 }
1434
kbd_get_valid_token_counts(void)1435 static int kbd_get_valid_token_counts(void)
1436 {
1437 return hweight16(kbd_token_bits);
1438 }
1439
kbd_init_info(void)1440 static inline int kbd_init_info(void)
1441 {
1442 struct kbd_state state;
1443 int ret;
1444 int i;
1445
1446 ret = kbd_get_info(&kbd_info);
1447 if (ret)
1448 return ret;
1449
1450 /* NOTE: Old models without KBD_LED_AC_TOKEN token supports only one
1451 * timeout value which is shared for both battery and AC power
1452 * settings. So do not try to set AC values on old models.
1453 */
1454 if ((quirks && quirks->kbd_missing_ac_tag) ||
1455 dell_smbios_find_token(KBD_LED_AC_TOKEN))
1456 kbd_timeout_ac_supported = true;
1457
1458 kbd_get_state(&state);
1459
1460 /* NOTE: timeout value is stored in 6 bits so max value is 63 */
1461 if (kbd_info.seconds > 63)
1462 kbd_info.seconds = 63;
1463 if (kbd_info.minutes > 63)
1464 kbd_info.minutes = 63;
1465 if (kbd_info.hours > 63)
1466 kbd_info.hours = 63;
1467 if (kbd_info.days > 63)
1468 kbd_info.days = 63;
1469
1470 /* NOTE: On tested machines ON mode did not work and caused
1471 * problems (turned backlight off) so do not use it
1472 */
1473 kbd_info.modes &= ~BIT(KBD_MODE_BIT_ON);
1474
1475 kbd_previous_level = kbd_get_level(&state);
1476 kbd_previous_mode_bit = state.mode_bit;
1477
1478 if (kbd_previous_level == 0 && kbd_get_max_level() != 0)
1479 kbd_previous_level = 1;
1480
1481 if (kbd_previous_mode_bit == KBD_MODE_BIT_OFF) {
1482 kbd_previous_mode_bit =
1483 ffs(kbd_info.modes & ~BIT(KBD_MODE_BIT_OFF));
1484 if (kbd_previous_mode_bit != 0)
1485 kbd_previous_mode_bit--;
1486 }
1487
1488 if (kbd_info.modes & (BIT(KBD_MODE_BIT_ALS) |
1489 BIT(KBD_MODE_BIT_TRIGGER_ALS)))
1490 kbd_als_supported = true;
1491
1492 if (kbd_info.modes & (
1493 BIT(KBD_MODE_BIT_TRIGGER_ALS) | BIT(KBD_MODE_BIT_TRIGGER) |
1494 BIT(KBD_MODE_BIT_TRIGGER_25) | BIT(KBD_MODE_BIT_TRIGGER_50) |
1495 BIT(KBD_MODE_BIT_TRIGGER_75) | BIT(KBD_MODE_BIT_TRIGGER_100)
1496 ))
1497 kbd_triggers_supported = true;
1498
1499 /* kbd_mode_levels[0] is reserved, see below */
1500 for (i = 0; i < 16; ++i)
1501 if (kbd_is_level_mode_bit(i) && (BIT(i) & kbd_info.modes))
1502 kbd_mode_levels[1 + kbd_mode_levels_count++] = i;
1503
1504 /*
1505 * Find the first supported mode and assign to kbd_mode_levels[0].
1506 * This should be 0 (off), but we cannot depend on the BIOS to
1507 * support 0.
1508 */
1509 if (kbd_mode_levels_count > 0) {
1510 for (i = 0; i < 16; ++i) {
1511 if (BIT(i) & kbd_info.modes) {
1512 kbd_mode_levels[0] = i;
1513 break;
1514 }
1515 }
1516 kbd_mode_levels_count++;
1517 }
1518
1519 return 0;
1520
1521 }
1522
kbd_init_tokens(void)1523 static inline void kbd_init_tokens(void)
1524 {
1525 int i;
1526
1527 for (i = 0; i < ARRAY_SIZE(kbd_tokens); ++i)
1528 if (dell_smbios_find_token(kbd_tokens[i]))
1529 kbd_token_bits |= BIT(i);
1530 }
1531
kbd_init(void)1532 static void kbd_init(void)
1533 {
1534 int ret;
1535
1536 if (quirks && quirks->kbd_led_not_present)
1537 return;
1538
1539 ret = kbd_init_info();
1540 kbd_init_tokens();
1541
1542 /*
1543 * Only supports keyboard backlight when it has at least two modes.
1544 */
1545 if ((ret == 0 && (kbd_info.levels != 0 || kbd_mode_levels_count >= 2))
1546 || kbd_get_valid_token_counts() >= 2)
1547 kbd_led_present = true;
1548 }
1549
kbd_led_timeout_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)1550 static ssize_t kbd_led_timeout_store(struct device *dev,
1551 struct device_attribute *attr,
1552 const char *buf, size_t count)
1553 {
1554 struct kbd_state new_state;
1555 struct kbd_state state;
1556 bool convert;
1557 int value;
1558 int ret;
1559 char ch;
1560 u8 unit;
1561 int i;
1562
1563 ret = sscanf(buf, "%d %c", &value, &ch);
1564 if (ret < 1)
1565 return -EINVAL;
1566 else if (ret == 1)
1567 ch = 's';
1568
1569 if (value < 0)
1570 return -EINVAL;
1571
1572 convert = false;
1573
1574 switch (ch) {
1575 case 's':
1576 if (value > kbd_info.seconds)
1577 convert = true;
1578 unit = KBD_TIMEOUT_SECONDS;
1579 break;
1580 case 'm':
1581 if (value > kbd_info.minutes)
1582 convert = true;
1583 unit = KBD_TIMEOUT_MINUTES;
1584 break;
1585 case 'h':
1586 if (value > kbd_info.hours)
1587 convert = true;
1588 unit = KBD_TIMEOUT_HOURS;
1589 break;
1590 case 'd':
1591 if (value > kbd_info.days)
1592 convert = true;
1593 unit = KBD_TIMEOUT_DAYS;
1594 break;
1595 default:
1596 return -EINVAL;
1597 }
1598
1599 if (quirks && quirks->needs_kbd_timeouts)
1600 convert = true;
1601
1602 if (convert) {
1603 /* Convert value from current units to seconds */
1604 switch (unit) {
1605 case KBD_TIMEOUT_DAYS:
1606 value *= 24;
1607 fallthrough;
1608 case KBD_TIMEOUT_HOURS:
1609 value *= 60;
1610 fallthrough;
1611 case KBD_TIMEOUT_MINUTES:
1612 value *= 60;
1613 unit = KBD_TIMEOUT_SECONDS;
1614 }
1615
1616 if (quirks && quirks->needs_kbd_timeouts) {
1617 for (i = 0; quirks->kbd_timeouts[i] != -1; i++) {
1618 if (value <= quirks->kbd_timeouts[i]) {
1619 value = quirks->kbd_timeouts[i];
1620 break;
1621 }
1622 }
1623 }
1624
1625 if (value <= kbd_info.seconds && kbd_info.seconds) {
1626 unit = KBD_TIMEOUT_SECONDS;
1627 } else if (value / 60 <= kbd_info.minutes && kbd_info.minutes) {
1628 value /= 60;
1629 unit = KBD_TIMEOUT_MINUTES;
1630 } else if (value / (60 * 60) <= kbd_info.hours && kbd_info.hours) {
1631 value /= (60 * 60);
1632 unit = KBD_TIMEOUT_HOURS;
1633 } else if (value / (60 * 60 * 24) <= kbd_info.days && kbd_info.days) {
1634 value /= (60 * 60 * 24);
1635 unit = KBD_TIMEOUT_DAYS;
1636 } else {
1637 return -EINVAL;
1638 }
1639 }
1640
1641 mutex_lock(&kbd_led_mutex);
1642
1643 ret = kbd_get_state(&state);
1644 if (ret)
1645 goto out;
1646
1647 new_state = state;
1648
1649 if (kbd_timeout_ac_supported && power_supply_is_system_supplied() > 0) {
1650 new_state.timeout_value_ac = value;
1651 new_state.timeout_unit_ac = unit;
1652 } else {
1653 new_state.timeout_value = value;
1654 new_state.timeout_unit = unit;
1655 }
1656
1657 ret = kbd_set_state_safe(&new_state, &state);
1658 if (ret)
1659 goto out;
1660
1661 ret = count;
1662 out:
1663 mutex_unlock(&kbd_led_mutex);
1664 return ret;
1665 }
1666
kbd_led_timeout_show(struct device * dev,struct device_attribute * attr,char * buf)1667 static ssize_t kbd_led_timeout_show(struct device *dev,
1668 struct device_attribute *attr, char *buf)
1669 {
1670 struct kbd_state state;
1671 int value;
1672 int ret;
1673 int len;
1674 u8 unit;
1675
1676 ret = kbd_get_state(&state);
1677 if (ret)
1678 return ret;
1679
1680 if (kbd_timeout_ac_supported && power_supply_is_system_supplied() > 0) {
1681 value = state.timeout_value_ac;
1682 unit = state.timeout_unit_ac;
1683 } else {
1684 value = state.timeout_value;
1685 unit = state.timeout_unit;
1686 }
1687
1688 len = sprintf(buf, "%d", value);
1689
1690 switch (unit) {
1691 case KBD_TIMEOUT_SECONDS:
1692 return len + sprintf(buf+len, "s\n");
1693 case KBD_TIMEOUT_MINUTES:
1694 return len + sprintf(buf+len, "m\n");
1695 case KBD_TIMEOUT_HOURS:
1696 return len + sprintf(buf+len, "h\n");
1697 case KBD_TIMEOUT_DAYS:
1698 return len + sprintf(buf+len, "d\n");
1699 default:
1700 return -EINVAL;
1701 }
1702
1703 return len;
1704 }
1705
1706 static DEVICE_ATTR(stop_timeout, S_IRUGO | S_IWUSR,
1707 kbd_led_timeout_show, kbd_led_timeout_store);
1708
1709 static const char * const kbd_led_triggers[] = {
1710 "keyboard",
1711 "touchpad",
1712 /*"trackstick"*/ NULL, /* NOTE: trackstick is just alias for touchpad */
1713 "mouse",
1714 };
1715
kbd_led_triggers_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)1716 static ssize_t kbd_led_triggers_store(struct device *dev,
1717 struct device_attribute *attr,
1718 const char *buf, size_t count)
1719 {
1720 struct kbd_state new_state;
1721 struct kbd_state state;
1722 bool triggers_enabled = false;
1723 int trigger_bit = -1;
1724 char trigger[21];
1725 int i, ret;
1726
1727 ret = sscanf(buf, "%20s", trigger);
1728 if (ret != 1)
1729 return -EINVAL;
1730
1731 if (trigger[0] != '+' && trigger[0] != '-')
1732 return -EINVAL;
1733
1734 mutex_lock(&kbd_led_mutex);
1735
1736 ret = kbd_get_state(&state);
1737 if (ret)
1738 goto out;
1739
1740 if (kbd_triggers_supported)
1741 triggers_enabled = kbd_is_trigger_mode_bit(state.mode_bit);
1742
1743 if (kbd_triggers_supported) {
1744 for (i = 0; i < ARRAY_SIZE(kbd_led_triggers); ++i) {
1745 if (!(kbd_info.triggers & BIT(i)))
1746 continue;
1747 if (!kbd_led_triggers[i])
1748 continue;
1749 if (strcmp(trigger+1, kbd_led_triggers[i]) != 0)
1750 continue;
1751 if (trigger[0] == '+' &&
1752 triggers_enabled && (state.triggers & BIT(i))) {
1753 ret = count;
1754 goto out;
1755 }
1756 if (trigger[0] == '-' &&
1757 (!triggers_enabled || !(state.triggers & BIT(i)))) {
1758 ret = count;
1759 goto out;
1760 }
1761 trigger_bit = i;
1762 break;
1763 }
1764 }
1765
1766 if (trigger_bit == -1) {
1767 ret = -EINVAL;
1768 goto out;
1769 }
1770
1771 new_state = state;
1772 if (trigger[0] == '+')
1773 new_state.triggers |= BIT(trigger_bit);
1774 else {
1775 new_state.triggers &= ~BIT(trigger_bit);
1776 /*
1777 * NOTE: trackstick bit (2) must be disabled when
1778 * disabling touchpad bit (1), otherwise touchpad
1779 * bit (1) will not be disabled
1780 */
1781 if (trigger_bit == 1)
1782 new_state.triggers &= ~BIT(2);
1783 }
1784 if ((kbd_info.triggers & new_state.triggers) !=
1785 new_state.triggers) {
1786 ret = -EINVAL;
1787 goto out;
1788 }
1789 if (new_state.triggers && !triggers_enabled) {
1790 new_state.mode_bit = KBD_MODE_BIT_TRIGGER;
1791 kbd_set_level(&new_state, kbd_previous_level);
1792 } else if (new_state.triggers == 0) {
1793 kbd_set_level(&new_state, 0);
1794 }
1795 if (!(kbd_info.modes & BIT(new_state.mode_bit))) {
1796 ret = -EINVAL;
1797 goto out;
1798 }
1799 ret = kbd_set_state_safe(&new_state, &state);
1800 if (ret)
1801 goto out;
1802 if (new_state.mode_bit != KBD_MODE_BIT_OFF)
1803 kbd_previous_mode_bit = new_state.mode_bit;
1804 ret = count;
1805 out:
1806 mutex_unlock(&kbd_led_mutex);
1807 return ret;
1808 }
1809
kbd_led_triggers_show(struct device * dev,struct device_attribute * attr,char * buf)1810 static ssize_t kbd_led_triggers_show(struct device *dev,
1811 struct device_attribute *attr, char *buf)
1812 {
1813 struct kbd_state state;
1814 bool triggers_enabled;
1815 int level, i, ret;
1816 int len = 0;
1817
1818 ret = kbd_get_state(&state);
1819 if (ret)
1820 return ret;
1821
1822 len = 0;
1823
1824 if (kbd_triggers_supported) {
1825 triggers_enabled = kbd_is_trigger_mode_bit(state.mode_bit);
1826 level = kbd_get_level(&state);
1827 for (i = 0; i < ARRAY_SIZE(kbd_led_triggers); ++i) {
1828 if (!(kbd_info.triggers & BIT(i)))
1829 continue;
1830 if (!kbd_led_triggers[i])
1831 continue;
1832 if ((triggers_enabled || level <= 0) &&
1833 (state.triggers & BIT(i)))
1834 buf[len++] = '+';
1835 else
1836 buf[len++] = '-';
1837 len += sprintf(buf+len, "%s ", kbd_led_triggers[i]);
1838 }
1839 }
1840
1841 if (len)
1842 buf[len - 1] = '\n';
1843
1844 return len;
1845 }
1846
1847 static DEVICE_ATTR(start_triggers, S_IRUGO | S_IWUSR,
1848 kbd_led_triggers_show, kbd_led_triggers_store);
1849
kbd_led_als_enabled_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)1850 static ssize_t kbd_led_als_enabled_store(struct device *dev,
1851 struct device_attribute *attr,
1852 const char *buf, size_t count)
1853 {
1854 struct kbd_state new_state;
1855 struct kbd_state state;
1856 bool triggers_enabled = false;
1857 int enable;
1858 int ret;
1859
1860 ret = kstrtoint(buf, 0, &enable);
1861 if (ret)
1862 return ret;
1863
1864 mutex_lock(&kbd_led_mutex);
1865
1866 ret = kbd_get_state(&state);
1867 if (ret)
1868 goto out;
1869
1870 if (enable == kbd_is_als_mode_bit(state.mode_bit)) {
1871 ret = count;
1872 goto out;
1873 }
1874
1875 new_state = state;
1876
1877 if (kbd_triggers_supported)
1878 triggers_enabled = kbd_is_trigger_mode_bit(state.mode_bit);
1879
1880 if (enable) {
1881 if (triggers_enabled)
1882 new_state.mode_bit = KBD_MODE_BIT_TRIGGER_ALS;
1883 else
1884 new_state.mode_bit = KBD_MODE_BIT_ALS;
1885 } else {
1886 if (triggers_enabled) {
1887 new_state.mode_bit = KBD_MODE_BIT_TRIGGER;
1888 kbd_set_level(&new_state, kbd_previous_level);
1889 } else {
1890 new_state.mode_bit = KBD_MODE_BIT_ON;
1891 }
1892 }
1893 if (!(kbd_info.modes & BIT(new_state.mode_bit))) {
1894 ret = -EINVAL;
1895 goto out;
1896 }
1897
1898 ret = kbd_set_state_safe(&new_state, &state);
1899 if (ret)
1900 goto out;
1901 kbd_previous_mode_bit = new_state.mode_bit;
1902
1903 ret = count;
1904 out:
1905 mutex_unlock(&kbd_led_mutex);
1906 return ret;
1907 }
1908
kbd_led_als_enabled_show(struct device * dev,struct device_attribute * attr,char * buf)1909 static ssize_t kbd_led_als_enabled_show(struct device *dev,
1910 struct device_attribute *attr,
1911 char *buf)
1912 {
1913 struct kbd_state state;
1914 bool enabled = false;
1915 int ret;
1916
1917 ret = kbd_get_state(&state);
1918 if (ret)
1919 return ret;
1920 enabled = kbd_is_als_mode_bit(state.mode_bit);
1921
1922 return sprintf(buf, "%d\n", enabled ? 1 : 0);
1923 }
1924
1925 static DEVICE_ATTR(als_enabled, S_IRUGO | S_IWUSR,
1926 kbd_led_als_enabled_show, kbd_led_als_enabled_store);
1927
kbd_led_als_setting_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)1928 static ssize_t kbd_led_als_setting_store(struct device *dev,
1929 struct device_attribute *attr,
1930 const char *buf, size_t count)
1931 {
1932 struct kbd_state state;
1933 struct kbd_state new_state;
1934 u8 setting;
1935 int ret;
1936
1937 ret = kstrtou8(buf, 10, &setting);
1938 if (ret)
1939 return ret;
1940
1941 mutex_lock(&kbd_led_mutex);
1942
1943 ret = kbd_get_state(&state);
1944 if (ret)
1945 goto out;
1946
1947 new_state = state;
1948 new_state.als_setting = setting;
1949
1950 ret = kbd_set_state_safe(&new_state, &state);
1951 if (ret)
1952 goto out;
1953
1954 ret = count;
1955 out:
1956 mutex_unlock(&kbd_led_mutex);
1957 return ret;
1958 }
1959
kbd_led_als_setting_show(struct device * dev,struct device_attribute * attr,char * buf)1960 static ssize_t kbd_led_als_setting_show(struct device *dev,
1961 struct device_attribute *attr,
1962 char *buf)
1963 {
1964 struct kbd_state state;
1965 int ret;
1966
1967 ret = kbd_get_state(&state);
1968 if (ret)
1969 return ret;
1970
1971 return sprintf(buf, "%d\n", state.als_setting);
1972 }
1973
1974 static DEVICE_ATTR(als_setting, S_IRUGO | S_IWUSR,
1975 kbd_led_als_setting_show, kbd_led_als_setting_store);
1976
1977 static struct attribute *kbd_led_attrs[] = {
1978 &dev_attr_stop_timeout.attr,
1979 &dev_attr_start_triggers.attr,
1980 NULL,
1981 };
1982
1983 static const struct attribute_group kbd_led_group = {
1984 .attrs = kbd_led_attrs,
1985 };
1986
1987 static struct attribute *kbd_led_als_attrs[] = {
1988 &dev_attr_als_enabled.attr,
1989 &dev_attr_als_setting.attr,
1990 NULL,
1991 };
1992
1993 static const struct attribute_group kbd_led_als_group = {
1994 .attrs = kbd_led_als_attrs,
1995 };
1996
1997 static const struct attribute_group *kbd_led_groups[] = {
1998 &kbd_led_group,
1999 &kbd_led_als_group,
2000 NULL,
2001 };
2002
kbd_led_level_get(struct led_classdev * led_cdev)2003 static enum led_brightness kbd_led_level_get(struct led_classdev *led_cdev)
2004 {
2005 int ret;
2006 u16 num;
2007 struct kbd_state state;
2008
2009 if (kbd_get_max_level()) {
2010 ret = kbd_get_state(&state);
2011 if (ret)
2012 return 0;
2013 ret = kbd_get_level(&state);
2014 if (ret < 0)
2015 return 0;
2016 return ret;
2017 }
2018
2019 if (kbd_get_valid_token_counts()) {
2020 ret = kbd_get_first_active_token_bit();
2021 if (ret < 0)
2022 return 0;
2023 for (num = kbd_token_bits; num != 0 && ret > 0; --ret)
2024 num &= num - 1; /* clear the first bit set */
2025 if (num == 0)
2026 return 0;
2027 return ffs(num) - 1;
2028 }
2029
2030 pr_warn("Keyboard brightness level control not supported\n");
2031 return 0;
2032 }
2033
kbd_led_level_set(struct led_classdev * led_cdev,enum led_brightness value)2034 static int kbd_led_level_set(struct led_classdev *led_cdev,
2035 enum led_brightness value)
2036 {
2037 enum led_brightness new_value = value;
2038 struct kbd_state state;
2039 struct kbd_state new_state;
2040 u16 num;
2041 int ret;
2042
2043 mutex_lock(&kbd_led_mutex);
2044
2045 if (kbd_get_max_level()) {
2046 ret = kbd_get_state(&state);
2047 if (ret)
2048 goto out;
2049 new_state = state;
2050 ret = kbd_set_level(&new_state, value);
2051 if (ret)
2052 goto out;
2053 ret = kbd_set_state_safe(&new_state, &state);
2054 } else if (kbd_get_valid_token_counts()) {
2055 for (num = kbd_token_bits; num != 0 && value > 0; --value)
2056 num &= num - 1; /* clear the first bit set */
2057 if (num == 0)
2058 ret = 0;
2059 else
2060 ret = kbd_set_token_bit(ffs(num) - 1);
2061 } else {
2062 pr_warn("Keyboard brightness level control not supported\n");
2063 ret = -ENXIO;
2064 }
2065
2066 out:
2067 if (ret == 0)
2068 kbd_led_level = new_value;
2069
2070 mutex_unlock(&kbd_led_mutex);
2071 return ret;
2072 }
2073
2074 static struct led_classdev kbd_led = {
2075 .name = "dell::kbd_backlight",
2076 .flags = LED_BRIGHT_HW_CHANGED,
2077 .brightness_set_blocking = kbd_led_level_set,
2078 .brightness_get = kbd_led_level_get,
2079 .groups = kbd_led_groups,
2080 };
2081
kbd_led_init(struct device * dev)2082 static int __init kbd_led_init(struct device *dev)
2083 {
2084 int ret;
2085
2086 kbd_init();
2087 if (!kbd_led_present)
2088 return -ENODEV;
2089 if (!kbd_als_supported)
2090 kbd_led_groups[1] = NULL;
2091 kbd_led.max_brightness = kbd_get_max_level();
2092 if (!kbd_led.max_brightness) {
2093 kbd_led.max_brightness = kbd_get_valid_token_counts();
2094 if (kbd_led.max_brightness)
2095 kbd_led.max_brightness--;
2096 }
2097
2098 kbd_led_level = kbd_led_level_get(NULL);
2099
2100 ret = led_classdev_register(dev, &kbd_led);
2101 if (ret)
2102 kbd_led_present = false;
2103
2104 return ret;
2105 }
2106
brightness_set_exit(struct led_classdev * led_cdev,enum led_brightness value)2107 static void brightness_set_exit(struct led_classdev *led_cdev,
2108 enum led_brightness value)
2109 {
2110 /* Don't change backlight level on exit */
2111 };
2112
kbd_led_exit(void)2113 static void kbd_led_exit(void)
2114 {
2115 if (!kbd_led_present)
2116 return;
2117 kbd_led.brightness_set = brightness_set_exit;
2118 led_classdev_unregister(&kbd_led);
2119 }
2120
dell_laptop_notifier_call(struct notifier_block * nb,unsigned long action,void * data)2121 static int dell_laptop_notifier_call(struct notifier_block *nb,
2122 unsigned long action, void *data)
2123 {
2124 bool changed = false;
2125 enum led_brightness new_kbd_led_level;
2126
2127 switch (action) {
2128 case DELL_LAPTOP_KBD_BACKLIGHT_BRIGHTNESS_CHANGED:
2129 if (!kbd_led_present)
2130 break;
2131
2132 mutex_lock(&kbd_led_mutex);
2133 new_kbd_led_level = kbd_led_level_get(&kbd_led);
2134 if (kbd_led_level != new_kbd_led_level) {
2135 kbd_led_level = new_kbd_led_level;
2136 changed = true;
2137 }
2138 mutex_unlock(&kbd_led_mutex);
2139
2140 if (changed)
2141 led_classdev_notify_brightness_hw_changed(&kbd_led,
2142 kbd_led_level);
2143 break;
2144 }
2145
2146 return NOTIFY_OK;
2147 }
2148
2149 static struct notifier_block dell_laptop_notifier = {
2150 .notifier_call = dell_laptop_notifier_call,
2151 };
2152
micmute_led_set(struct led_classdev * led_cdev,enum led_brightness brightness)2153 static int micmute_led_set(struct led_classdev *led_cdev,
2154 enum led_brightness brightness)
2155 {
2156 struct calling_interface_buffer buffer;
2157 struct calling_interface_token *token;
2158 int state = brightness != LED_OFF;
2159
2160 if (state == 0)
2161 token = dell_smbios_find_token(GLOBAL_MIC_MUTE_DISABLE);
2162 else
2163 token = dell_smbios_find_token(GLOBAL_MIC_MUTE_ENABLE);
2164
2165 if (!token)
2166 return -ENODEV;
2167
2168 dell_fill_request(&buffer, token->location, token->value, 0, 0);
2169 dell_send_request(&buffer, CLASS_TOKEN_WRITE, SELECT_TOKEN_STD);
2170
2171 return 0;
2172 }
2173
2174 static struct led_classdev micmute_led_cdev = {
2175 .name = "platform::micmute",
2176 .max_brightness = 1,
2177 .brightness_set_blocking = micmute_led_set,
2178 .default_trigger = "audio-micmute",
2179 };
2180
mute_led_set(struct led_classdev * led_cdev,enum led_brightness brightness)2181 static int mute_led_set(struct led_classdev *led_cdev,
2182 enum led_brightness brightness)
2183 {
2184 struct calling_interface_buffer buffer;
2185 struct calling_interface_token *token;
2186 int state = brightness != LED_OFF;
2187
2188 if (state == 0)
2189 token = dell_smbios_find_token(GLOBAL_MUTE_DISABLE);
2190 else
2191 token = dell_smbios_find_token(GLOBAL_MUTE_ENABLE);
2192
2193 if (!token)
2194 return -ENODEV;
2195
2196 dell_fill_request(&buffer, token->location, token->value, 0, 0);
2197 dell_send_request(&buffer, CLASS_TOKEN_WRITE, SELECT_TOKEN_STD);
2198
2199 return 0;
2200 }
2201
2202 static struct led_classdev mute_led_cdev = {
2203 .name = "platform::mute",
2204 .max_brightness = 1,
2205 .brightness_set_blocking = mute_led_set,
2206 .default_trigger = "audio-mute",
2207 };
2208
dell_init(void)2209 static int __init dell_init(void)
2210 {
2211 struct calling_interface_token *token;
2212 int max_intensity = 0;
2213 int ret;
2214
2215 if (!dmi_check_system(dell_device_table))
2216 return -ENODEV;
2217
2218 quirks = NULL;
2219 /* find if this machine support other functions */
2220 dmi_check_system(dell_quirks);
2221
2222 ret = platform_driver_register(&platform_driver);
2223 if (ret)
2224 goto fail_platform_driver;
2225 platform_device = platform_device_alloc("dell-laptop", PLATFORM_DEVID_NONE);
2226 if (!platform_device) {
2227 ret = -ENOMEM;
2228 goto fail_platform_device1;
2229 }
2230 ret = platform_device_add(platform_device);
2231 if (ret)
2232 goto fail_platform_device2;
2233
2234 ret = dell_setup_rfkill();
2235
2236 if (ret) {
2237 pr_warn("Unable to setup rfkill\n");
2238 goto fail_rfkill;
2239 }
2240
2241 if (quirks && quirks->touchpad_led)
2242 touchpad_led_init(&platform_device->dev);
2243
2244 kbd_led_init(&platform_device->dev);
2245
2246 dell_laptop_dir = debugfs_create_dir("dell_laptop", NULL);
2247 debugfs_create_file("rfkill", 0444, dell_laptop_dir, NULL,
2248 &dell_debugfs_fops);
2249
2250 dell_laptop_register_notifier(&dell_laptop_notifier);
2251
2252 if (dell_smbios_find_token(GLOBAL_MIC_MUTE_DISABLE) &&
2253 dell_smbios_find_token(GLOBAL_MIC_MUTE_ENABLE) &&
2254 !dell_privacy_has_mic_mute()) {
2255 micmute_led_cdev.brightness = ledtrig_audio_get(LED_AUDIO_MICMUTE);
2256 ret = led_classdev_register(&platform_device->dev, &micmute_led_cdev);
2257 if (ret < 0)
2258 goto fail_led;
2259 micmute_led_registered = true;
2260 }
2261
2262 if (dell_smbios_find_token(GLOBAL_MUTE_DISABLE) &&
2263 dell_smbios_find_token(GLOBAL_MUTE_ENABLE)) {
2264 mute_led_cdev.brightness = ledtrig_audio_get(LED_AUDIO_MUTE);
2265 ret = led_classdev_register(&platform_device->dev, &mute_led_cdev);
2266 if (ret < 0)
2267 goto fail_backlight;
2268 mute_led_registered = true;
2269 }
2270
2271 if (acpi_video_get_backlight_type() != acpi_backlight_vendor)
2272 return 0;
2273
2274 token = dell_smbios_find_token(BRIGHTNESS_TOKEN);
2275 if (token) {
2276 struct calling_interface_buffer buffer;
2277
2278 dell_fill_request(&buffer, token->location, 0, 0, 0);
2279 ret = dell_send_request(&buffer,
2280 CLASS_TOKEN_READ, SELECT_TOKEN_AC);
2281 if (ret == 0)
2282 max_intensity = buffer.output[3];
2283 }
2284
2285 if (max_intensity) {
2286 struct backlight_properties props;
2287 memset(&props, 0, sizeof(struct backlight_properties));
2288 props.type = BACKLIGHT_PLATFORM;
2289 props.max_brightness = max_intensity;
2290 dell_backlight_device = backlight_device_register("dell_backlight",
2291 &platform_device->dev,
2292 NULL,
2293 &dell_ops,
2294 &props);
2295
2296 if (IS_ERR(dell_backlight_device)) {
2297 ret = PTR_ERR(dell_backlight_device);
2298 dell_backlight_device = NULL;
2299 goto fail_backlight;
2300 }
2301
2302 dell_backlight_device->props.brightness =
2303 dell_get_intensity(dell_backlight_device);
2304 if (dell_backlight_device->props.brightness < 0) {
2305 ret = dell_backlight_device->props.brightness;
2306 goto fail_get_brightness;
2307 }
2308 backlight_update_status(dell_backlight_device);
2309 }
2310
2311 return 0;
2312
2313 fail_get_brightness:
2314 backlight_device_unregister(dell_backlight_device);
2315 fail_backlight:
2316 if (micmute_led_registered)
2317 led_classdev_unregister(&micmute_led_cdev);
2318 if (mute_led_registered)
2319 led_classdev_unregister(&mute_led_cdev);
2320 fail_led:
2321 dell_cleanup_rfkill();
2322 fail_rfkill:
2323 platform_device_del(platform_device);
2324 fail_platform_device2:
2325 platform_device_put(platform_device);
2326 fail_platform_device1:
2327 platform_driver_unregister(&platform_driver);
2328 fail_platform_driver:
2329 return ret;
2330 }
2331
dell_exit(void)2332 static void __exit dell_exit(void)
2333 {
2334 dell_laptop_unregister_notifier(&dell_laptop_notifier);
2335 debugfs_remove_recursive(dell_laptop_dir);
2336 if (quirks && quirks->touchpad_led)
2337 touchpad_led_exit();
2338 kbd_led_exit();
2339 backlight_device_unregister(dell_backlight_device);
2340 if (micmute_led_registered)
2341 led_classdev_unregister(&micmute_led_cdev);
2342 if (mute_led_registered)
2343 led_classdev_unregister(&mute_led_cdev);
2344 dell_cleanup_rfkill();
2345 if (platform_device) {
2346 platform_device_unregister(platform_device);
2347 platform_driver_unregister(&platform_driver);
2348 }
2349 }
2350
2351 /* dell-rbtn.c driver export functions which will not work correctly (and could
2352 * cause kernel crash) if they are called before dell-rbtn.c init code. This is
2353 * not problem when dell-rbtn.c is compiled as external module. When both files
2354 * (dell-rbtn.c and dell-laptop.c) are compiled statically into kernel, then we
2355 * need to ensure that dell_init() will be called after initializing dell-rbtn.
2356 * This can be achieved by late_initcall() instead module_init().
2357 */
2358 late_initcall(dell_init);
2359 module_exit(dell_exit);
2360
2361 MODULE_AUTHOR("Matthew Garrett <mjg@redhat.com>");
2362 MODULE_AUTHOR("Gabriele Mazzotta <gabriele.mzt@gmail.com>");
2363 MODULE_AUTHOR("Pali Rohár <pali@kernel.org>");
2364 MODULE_DESCRIPTION("Dell laptop driver");
2365 MODULE_LICENSE("GPL");
2366