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