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