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Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
[cris-mirror.git] / drivers / platform / x86 / dell-laptop.c
blobc52c6723374b50b26041d7681c3d9ae3564d50ce
1 /*
2 * Driver for Dell laptop extras
3 *
4 * Copyright (c) Red Hat <mjg@redhat.com>
5 * Copyright (c) 2014 Gabriele Mazzotta <gabriele.mzt@gmail.com>
6 * Copyright (c) 2014 Pali Rohár <pali.rohar@gmail.com>
7 *
8 * Based on documentation in the libsmbios package:
9 * Copyright (C) 2005-2014 Dell Inc.
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License version 2 as
13 * published by the Free Software Foundation.
14 */
15
16 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
17
18 #include <linux/module.h>
19 #include <linux/kernel.h>
20 #include <linux/init.h>
21 #include <linux/platform_device.h>
22 #include <linux/backlight.h>
23 #include <linux/err.h>
24 #include <linux/dmi.h>
25 #include <linux/io.h>
26 #include <linux/rfkill.h>
27 #include <linux/power_supply.h>
28 #include <linux/acpi.h>
29 #include <linux/mm.h>
30 #include <linux/i8042.h>
31 #include <linux/debugfs.h>
32 #include <linux/dell-led.h>
33 #include <linux/seq_file.h>
34 #include <acpi/video.h>
35 #include "dell-rbtn.h"
36 #include "dell-smbios.h"
37
38 struct quirk_entry {
39 bool touchpad_led;
40 bool kbd_led_levels_off_1;
41
42 bool needs_kbd_timeouts;
43 /*
44 * Ordered list of timeouts expressed in seconds.
45 * The list must end with -1
46 */
47 int kbd_timeouts[];
48 };
49
50 static struct quirk_entry *quirks;
51
52 static struct quirk_entry quirk_dell_vostro_v130 = {
53 .touchpad_led = true,
54 };
55
56 static int __init dmi_matched(const struct dmi_system_id *dmi)
57 {
58 quirks = dmi->driver_data;
59 return 1;
60 }
61
62 /*
63 * These values come from Windows utility provided by Dell. If any other value
64 * is used then BIOS silently set timeout to 0 without any error message.
65 */
66 static struct quirk_entry quirk_dell_xps13_9333 = {
67 .needs_kbd_timeouts = true,
68 .kbd_timeouts = { 0, 5, 15, 60, 5 * 60, 15 * 60, -1 },
69 };
70
71 static struct quirk_entry quirk_dell_latitude_e6410 = {
72 .kbd_led_levels_off_1 = true,
73 };
74
75 static struct platform_driver platform_driver = {
76 .driver = {
77 .name = "dell-laptop",
78 }
79 };
80
81 static struct platform_device *platform_device;
82 static struct backlight_device *dell_backlight_device;
83 static struct rfkill *wifi_rfkill;
84 static struct rfkill *bluetooth_rfkill;
85 static struct rfkill *wwan_rfkill;
86 static bool force_rfkill;
87
88 module_param(force_rfkill, bool, 0444);
89 MODULE_PARM_DESC(force_rfkill, "enable rfkill on non whitelisted models");
90
91 static const struct dmi_system_id dell_device_table[] __initconst = {
92 {
93 .ident = "Dell laptop",
94 .matches = {
95 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
96 DMI_MATCH(DMI_CHASSIS_TYPE, "8"),
97 },
98 },
99 {
100 .matches = {
101 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
102 DMI_MATCH(DMI_CHASSIS_TYPE, "9"), /*Laptop*/
103 },
104 },
105 {
106 .matches = {
107 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
108 DMI_MATCH(DMI_CHASSIS_TYPE, "10"), /*Notebook*/
109 },
110 },
111 {
112 .matches = {
113 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
114 DMI_MATCH(DMI_CHASSIS_TYPE, "30"), /*Tablet*/
115 },
116 },
117 {
118 .matches = {
119 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
120 DMI_MATCH(DMI_CHASSIS_TYPE, "31"), /*Convertible*/
121 },
122 },
123 {
124 .matches = {
125 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
126 DMI_MATCH(DMI_CHASSIS_TYPE, "32"), /*Detachable*/
127 },
128 },
129 {
130 .ident = "Dell Computer Corporation",
131 .matches = {
132 DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer Corporation"),
133 DMI_MATCH(DMI_CHASSIS_TYPE, "8"),
134 },
135 },
136 { }
137 };
138 MODULE_DEVICE_TABLE(dmi, dell_device_table);
139
140 static const struct dmi_system_id dell_quirks[] __initconst = {
141 {
142 .callback = dmi_matched,
143 .ident = "Dell Vostro V130",
144 .matches = {
145 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
146 DMI_MATCH(DMI_PRODUCT_NAME, "Vostro V130"),
147 },
148 .driver_data = &quirk_dell_vostro_v130,
149 },
150 {
151 .callback = dmi_matched,
152 .ident = "Dell Vostro V131",
153 .matches = {
154 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
155 DMI_MATCH(DMI_PRODUCT_NAME, "Vostro V131"),
156 },
157 .driver_data = &quirk_dell_vostro_v130,
158 },
159 {
160 .callback = dmi_matched,
161 .ident = "Dell Vostro 3350",
162 .matches = {
163 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
164 DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 3350"),
165 },
166 .driver_data = &quirk_dell_vostro_v130,
167 },
168 {
169 .callback = dmi_matched,
170 .ident = "Dell Vostro 3555",
171 .matches = {
172 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
173 DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 3555"),
174 },
175 .driver_data = &quirk_dell_vostro_v130,
176 },
177 {
178 .callback = dmi_matched,
179 .ident = "Dell Inspiron N311z",
180 .matches = {
181 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
182 DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron N311z"),
183 },
184 .driver_data = &quirk_dell_vostro_v130,
185 },
186 {
187 .callback = dmi_matched,
188 .ident = "Dell Inspiron M5110",
189 .matches = {
190 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
191 DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron M5110"),
192 },
193 .driver_data = &quirk_dell_vostro_v130,
194 },
195 {
196 .callback = dmi_matched,
197 .ident = "Dell Vostro 3360",
198 .matches = {
199 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
200 DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 3360"),
201 },
202 .driver_data = &quirk_dell_vostro_v130,
203 },
204 {
205 .callback = dmi_matched,
206 .ident = "Dell Vostro 3460",
207 .matches = {
208 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
209 DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 3460"),
210 },
211 .driver_data = &quirk_dell_vostro_v130,
212 },
213 {
214 .callback = dmi_matched,
215 .ident = "Dell Vostro 3560",
216 .matches = {
217 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
218 DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 3560"),
219 },
220 .driver_data = &quirk_dell_vostro_v130,
221 },
222 {
223 .callback = dmi_matched,
224 .ident = "Dell Vostro 3450",
225 .matches = {
226 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
227 DMI_MATCH(DMI_PRODUCT_NAME, "Dell System Vostro 3450"),
228 },
229 .driver_data = &quirk_dell_vostro_v130,
230 },
231 {
232 .callback = dmi_matched,
233 .ident = "Dell Inspiron 5420",
234 .matches = {
235 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
236 DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 5420"),
237 },
238 .driver_data = &quirk_dell_vostro_v130,
239 },
240 {
241 .callback = dmi_matched,
242 .ident = "Dell Inspiron 5520",
243 .matches = {
244 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
245 DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 5520"),
246 },
247 .driver_data = &quirk_dell_vostro_v130,
248 },
249 {
250 .callback = dmi_matched,
251 .ident = "Dell Inspiron 5720",
252 .matches = {
253 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
254 DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 5720"),
255 },
256 .driver_data = &quirk_dell_vostro_v130,
257 },
258 {
259 .callback = dmi_matched,
260 .ident = "Dell Inspiron 7420",
261 .matches = {
262 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
263 DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 7420"),
264 },
265 .driver_data = &quirk_dell_vostro_v130,
266 },
267 {
268 .callback = dmi_matched,
269 .ident = "Dell Inspiron 7520",
270 .matches = {
271 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
272 DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 7520"),
273 },
274 .driver_data = &quirk_dell_vostro_v130,
275 },
276 {
277 .callback = dmi_matched,
278 .ident = "Dell Inspiron 7720",
279 .matches = {
280 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
281 DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 7720"),
282 },
283 .driver_data = &quirk_dell_vostro_v130,
284 },
285 {
286 .callback = dmi_matched,
287 .ident = "Dell XPS13 9333",
288 .matches = {
289 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
290 DMI_MATCH(DMI_PRODUCT_NAME, "XPS13 9333"),
291 },
292 .driver_data = &quirk_dell_xps13_9333,
293 },
294 {
295 .callback = dmi_matched,
296 .ident = "Dell Latitude E6410",
297 .matches = {
298 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
299 DMI_MATCH(DMI_PRODUCT_NAME, "Latitude E6410"),
300 },
301 .driver_data = &quirk_dell_latitude_e6410,
302 },
303 { }
304 };
305
306 static void dell_fill_request(struct calling_interface_buffer *buffer,
307 u32 arg0, u32 arg1, u32 arg2, u32 arg3)
308 {
309 memset(buffer, 0, sizeof(struct calling_interface_buffer));
310 buffer->input[0] = arg0;
311 buffer->input[1] = arg1;
312 buffer->input[2] = arg2;
313 buffer->input[3] = arg3;
314 }
315
316 static int dell_send_request(struct calling_interface_buffer *buffer,
317 u16 class, u16 select)
318 {
319 int ret;
320
321 buffer->cmd_class = class;
322 buffer->cmd_select = select;
323 ret = dell_smbios_call(buffer);
324 if (ret != 0)
325 return ret;
326 return dell_smbios_error(buffer->output[0]);
327 }
328
329 /*
330 * Derived from information in smbios-wireless-ctl:
331 *
332 * cbSelect 17, Value 11
333 *
334 * Return Wireless Info
335 * cbArg1, byte0 = 0x00
336 *
337 * cbRes1 Standard return codes (0, -1, -2)
338 * cbRes2 Info bit flags:
339 *
340 * 0 Hardware switch supported (1)
341 * 1 WiFi locator supported (1)
342 * 2 WLAN supported (1)
343 * 3 Bluetooth (BT) supported (1)
344 * 4 WWAN supported (1)
345 * 5 Wireless KBD supported (1)
346 * 6 Uw b supported (1)
347 * 7 WiGig supported (1)
348 * 8 WLAN installed (1)
349 * 9 BT installed (1)
350 * 10 WWAN installed (1)
351 * 11 Uw b installed (1)
352 * 12 WiGig installed (1)
353 * 13-15 Reserved (0)
354 * 16 Hardware (HW) switch is On (1)
355 * 17 WLAN disabled (1)
356 * 18 BT disabled (1)
357 * 19 WWAN disabled (1)
358 * 20 Uw b disabled (1)
359 * 21 WiGig disabled (1)
360 * 20-31 Reserved (0)
361 *
362 * cbRes3 NVRAM size in bytes
363 * cbRes4, byte 0 NVRAM format version number
364 *
365 *
366 * Set QuickSet Radio Disable Flag
367 * cbArg1, byte0 = 0x01
368 * cbArg1, byte1
369 * Radio ID value:
370 * 0 Radio Status
371 * 1 WLAN ID
372 * 2 BT ID
373 * 3 WWAN ID
374 * 4 UWB ID
375 * 5 WIGIG ID
376 * cbArg1, byte2 Flag bits:
377 * 0 QuickSet disables radio (1)
378 * 1-7 Reserved (0)
379 *
380 * cbRes1 Standard return codes (0, -1, -2)
381 * cbRes2 QuickSet (QS) radio disable bit map:
382 * 0 QS disables WLAN
383 * 1 QS disables BT
384 * 2 QS disables WWAN
385 * 3 QS disables UWB
386 * 4 QS disables WIGIG
387 * 5-31 Reserved (0)
388 *
389 * Wireless Switch Configuration
390 * cbArg1, byte0 = 0x02
391 *
392 * cbArg1, byte1
393 * Subcommand:
394 * 0 Get config
395 * 1 Set config
396 * 2 Set WiFi locator enable/disable
397 * cbArg1,byte2
398 * Switch settings (if byte 1==1):
399 * 0 WLAN sw itch control (1)
400 * 1 BT sw itch control (1)
401 * 2 WWAN sw itch control (1)
402 * 3 UWB sw itch control (1)
403 * 4 WiGig sw itch control (1)
404 * 5-7 Reserved (0)
405 * cbArg1, byte2 Enable bits (if byte 1==2):
406 * 0 Enable WiFi locator (1)
407 *
408 * cbRes1 Standard return codes (0, -1, -2)
409 * cbRes2 QuickSet radio disable bit map:
410 * 0 WLAN controlled by sw itch (1)
411 * 1 BT controlled by sw itch (1)
412 * 2 WWAN controlled by sw itch (1)
413 * 3 UWB controlled by sw itch (1)
414 * 4 WiGig controlled by sw itch (1)
415 * 5-6 Reserved (0)
416 * 7 Wireless sw itch config locked (1)
417 * 8 WiFi locator enabled (1)
418 * 9-14 Reserved (0)
419 * 15 WiFi locator setting locked (1)
420 * 16-31 Reserved (0)
421 *
422 * Read Local Config Data (LCD)
423 * cbArg1, byte0 = 0x10
424 * cbArg1, byte1 NVRAM index low byte
425 * cbArg1, byte2 NVRAM index high byte
426 * cbRes1 Standard return codes (0, -1, -2)
427 * cbRes2 4 bytes read from LCD[index]
428 * cbRes3 4 bytes read from LCD[index+4]
429 * cbRes4 4 bytes read from LCD[index+8]
430 *
431 * Write Local Config Data (LCD)
432 * cbArg1, byte0 = 0x11
433 * cbArg1, byte1 NVRAM index low byte
434 * cbArg1, byte2 NVRAM index high byte
435 * cbArg2 4 bytes to w rite at LCD[index]
436 * cbArg3 4 bytes to w rite at LCD[index+4]
437 * cbArg4 4 bytes to w rite at LCD[index+8]
438 * cbRes1 Standard return codes (0, -1, -2)
439 *
440 * Populate Local Config Data from NVRAM
441 * cbArg1, byte0 = 0x12
442 * cbRes1 Standard return codes (0, -1, -2)
443 *
444 * Commit Local Config Data to NVRAM
445 * cbArg1, byte0 = 0x13
446 * cbRes1 Standard return codes (0, -1, -2)
447 */
448
449 static int dell_rfkill_set(void *data, bool blocked)
450 {
451 int disable = blocked ? 1 : 0;
452 unsigned long radio = (unsigned long)data;
453 int hwswitch_bit = (unsigned long)data - 1;
454 struct calling_interface_buffer buffer;
455 int hwswitch;
456 int status;
457 int ret;
458
459 dell_fill_request(&buffer, 0, 0, 0, 0);
460 ret = dell_send_request(&buffer, CLASS_INFO, SELECT_RFKILL);
461 if (ret)
462 return ret;
463 status = buffer.output[1];
464
465 dell_fill_request(&buffer, 0x2, 0, 0, 0);
466 ret = dell_send_request(&buffer, CLASS_INFO, SELECT_RFKILL);
467 if (ret)
468 return ret;
469 hwswitch = buffer.output[1];
470
471 /* If the hardware switch controls this radio, and the hardware
472 switch is disabled, always disable the radio */
473 if (ret == 0 && (hwswitch & BIT(hwswitch_bit)) &&
474 (status & BIT(0)) && !(status & BIT(16)))
475 disable = 1;
476
477 dell_fill_request(&buffer, 1 | (radio<<8) | (disable << 16), 0, 0, 0);
478 ret = dell_send_request(&buffer, CLASS_INFO, SELECT_RFKILL);
479 return ret;
480 }
481
482 static void dell_rfkill_update_sw_state(struct rfkill *rfkill, int radio,
483 int status)
484 {
485 if (status & BIT(0)) {
486 /* Has hw-switch, sync sw_state to BIOS */
487 struct calling_interface_buffer buffer;
488 int block = rfkill_blocked(rfkill);
489 dell_fill_request(&buffer,
490 1 | (radio << 8) | (block << 16), 0, 0, 0);
491 dell_send_request(&buffer, CLASS_INFO, SELECT_RFKILL);
492 } else {
493 /* No hw-switch, sync BIOS state to sw_state */
494 rfkill_set_sw_state(rfkill, !!(status & BIT(radio + 16)));
495 }
496 }
497
498 static void dell_rfkill_update_hw_state(struct rfkill *rfkill, int radio,
499 int status, int hwswitch)
500 {
501 if (hwswitch & (BIT(radio - 1)))
502 rfkill_set_hw_state(rfkill, !(status & BIT(16)));
503 }
504
505 static void dell_rfkill_query(struct rfkill *rfkill, void *data)
506 {
507 int radio = ((unsigned long)data & 0xF);
508 struct calling_interface_buffer buffer;
509 int hwswitch;
510 int status;
511 int ret;
512
513 dell_fill_request(&buffer, 0, 0, 0, 0);
514 ret = dell_send_request(&buffer, CLASS_INFO, SELECT_RFKILL);
515 status = buffer.output[1];
516
517 if (ret != 0 || !(status & BIT(0))) {
518 return;
519 }
520
521 dell_fill_request(&buffer, 0, 0x2, 0, 0);
522 ret = dell_send_request(&buffer, CLASS_INFO, SELECT_RFKILL);
523 hwswitch = buffer.output[1];
524
525 if (ret != 0)
526 return;
527
528 dell_rfkill_update_hw_state(rfkill, radio, status, hwswitch);
529 }
530
531 static const struct rfkill_ops dell_rfkill_ops = {
532 .set_block = dell_rfkill_set,
533 .query = dell_rfkill_query,
534 };
535
536 static struct dentry *dell_laptop_dir;
537
538 static int dell_debugfs_show(struct seq_file *s, void *data)
539 {
540 struct calling_interface_buffer buffer;
541 int hwswitch_state;
542 int hwswitch_ret;
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 if (ret)
549 return ret;
550 status = buffer.output[1];
551
552 dell_fill_request(&buffer, 0, 0x2, 0, 0);
553 hwswitch_ret = dell_send_request(&buffer, CLASS_INFO, SELECT_RFKILL);
554 if (hwswitch_ret)
555 return hwswitch_ret;
556 hwswitch_state = buffer.output[1];
557
558 seq_printf(s, "return:\t%d\n", ret);
559 seq_printf(s, "status:\t0x%X\n", status);
560 seq_printf(s, "Bit 0 : Hardware switch supported: %lu\n",
561 status & BIT(0));
562 seq_printf(s, "Bit 1 : Wifi locator supported: %lu\n",
563 (status & BIT(1)) >> 1);
564 seq_printf(s, "Bit 2 : Wifi is supported: %lu\n",
565 (status & BIT(2)) >> 2);
566 seq_printf(s, "Bit 3 : Bluetooth is supported: %lu\n",
567 (status & BIT(3)) >> 3);
568 seq_printf(s, "Bit 4 : WWAN is supported: %lu\n",
569 (status & BIT(4)) >> 4);
570 seq_printf(s, "Bit 5 : Wireless keyboard supported: %lu\n",
571 (status & BIT(5)) >> 5);
572 seq_printf(s, "Bit 6 : UWB supported: %lu\n",
573 (status & BIT(6)) >> 6);
574 seq_printf(s, "Bit 7 : WiGig supported: %lu\n",
575 (status & BIT(7)) >> 7);
576 seq_printf(s, "Bit 8 : Wifi is installed: %lu\n",
577 (status & BIT(8)) >> 8);
578 seq_printf(s, "Bit 9 : Bluetooth is installed: %lu\n",
579 (status & BIT(9)) >> 9);
580 seq_printf(s, "Bit 10: WWAN is installed: %lu\n",
581 (status & BIT(10)) >> 10);
582 seq_printf(s, "Bit 11: UWB installed: %lu\n",
583 (status & BIT(11)) >> 11);
584 seq_printf(s, "Bit 12: WiGig installed: %lu\n",
585 (status & BIT(12)) >> 12);
586
587 seq_printf(s, "Bit 16: Hardware switch is on: %lu\n",
588 (status & BIT(16)) >> 16);
589 seq_printf(s, "Bit 17: Wifi is blocked: %lu\n",
590 (status & BIT(17)) >> 17);
591 seq_printf(s, "Bit 18: Bluetooth is blocked: %lu\n",
592 (status & BIT(18)) >> 18);
593 seq_printf(s, "Bit 19: WWAN is blocked: %lu\n",
594 (status & BIT(19)) >> 19);
595 seq_printf(s, "Bit 20: UWB is blocked: %lu\n",
596 (status & BIT(20)) >> 20);
597 seq_printf(s, "Bit 21: WiGig is blocked: %lu\n",
598 (status & BIT(21)) >> 21);
599
600 seq_printf(s, "\nhwswitch_return:\t%d\n", hwswitch_ret);
601 seq_printf(s, "hwswitch_state:\t0x%X\n", hwswitch_state);
602 seq_printf(s, "Bit 0 : Wifi controlled by switch: %lu\n",
603 hwswitch_state & BIT(0));
604 seq_printf(s, "Bit 1 : Bluetooth controlled by switch: %lu\n",
605 (hwswitch_state & BIT(1)) >> 1);
606 seq_printf(s, "Bit 2 : WWAN controlled by switch: %lu\n",
607 (hwswitch_state & BIT(2)) >> 2);
608 seq_printf(s, "Bit 3 : UWB controlled by switch: %lu\n",
609 (hwswitch_state & BIT(3)) >> 3);
610 seq_printf(s, "Bit 4 : WiGig controlled by switch: %lu\n",
611 (hwswitch_state & BIT(4)) >> 4);
612 seq_printf(s, "Bit 7 : Wireless switch config locked: %lu\n",
613 (hwswitch_state & BIT(7)) >> 7);
614 seq_printf(s, "Bit 8 : Wifi locator enabled: %lu\n",
615 (hwswitch_state & BIT(8)) >> 8);
616 seq_printf(s, "Bit 15: Wifi locator setting locked: %lu\n",
617 (hwswitch_state & BIT(15)) >> 15);
618
619 return 0;
620 }
621 DEFINE_SHOW_ATTRIBUTE(dell_debugfs);
622
623 static void dell_update_rfkill(struct work_struct *ignored)
624 {
625 struct calling_interface_buffer buffer;
626 int hwswitch = 0;
627 int status;
628 int ret;
629
630 dell_fill_request(&buffer, 0, 0, 0, 0);
631 ret = dell_send_request(&buffer, CLASS_INFO, SELECT_RFKILL);
632 status = buffer.output[1];
633
634 if (ret != 0)
635 return;
636
637 dell_fill_request(&buffer, 0, 0x2, 0, 0);
638 ret = dell_send_request(&buffer, CLASS_INFO, SELECT_RFKILL);
639
640 if (ret == 0 && (status & BIT(0)))
641 hwswitch = buffer.output[1];
642
643 if (wifi_rfkill) {
644 dell_rfkill_update_hw_state(wifi_rfkill, 1, status, hwswitch);
645 dell_rfkill_update_sw_state(wifi_rfkill, 1, status);
646 }
647 if (bluetooth_rfkill) {
648 dell_rfkill_update_hw_state(bluetooth_rfkill, 2, status,
649 hwswitch);
650 dell_rfkill_update_sw_state(bluetooth_rfkill, 2, status);
651 }
652 if (wwan_rfkill) {
653 dell_rfkill_update_hw_state(wwan_rfkill, 3, status, hwswitch);
654 dell_rfkill_update_sw_state(wwan_rfkill, 3, status);
655 }
656 }
657 static DECLARE_DELAYED_WORK(dell_rfkill_work, dell_update_rfkill);
658
659 static bool dell_laptop_i8042_filter(unsigned char data, unsigned char str,
660 struct serio *port)
661 {
662 static bool extended;
663
664 if (str & I8042_STR_AUXDATA)
665 return false;
666
667 if (unlikely(data == 0xe0)) {
668 extended = true;
669 return false;
670 } else if (unlikely(extended)) {
671 switch (data) {
672 case 0x8:
673 schedule_delayed_work(&dell_rfkill_work,
674 round_jiffies_relative(HZ / 4));
675 break;
676 }
677 extended = false;
678 }
679
680 return false;
681 }
682
683 static int (*dell_rbtn_notifier_register_func)(struct notifier_block *);
684 static int (*dell_rbtn_notifier_unregister_func)(struct notifier_block *);
685
686 static int dell_laptop_rbtn_notifier_call(struct notifier_block *nb,
687 unsigned long action, void *data)
688 {
689 schedule_delayed_work(&dell_rfkill_work, 0);
690 return NOTIFY_OK;
691 }
692
693 static struct notifier_block dell_laptop_rbtn_notifier = {
694 .notifier_call = dell_laptop_rbtn_notifier_call,
695 };
696
697 static int __init dell_setup_rfkill(void)
698 {
699 struct calling_interface_buffer buffer;
700 int status, ret, whitelisted;
701 const char *product;
702
703 /*
704 * rfkill support causes trouble on various models, mostly Inspirons.
705 * So we whitelist certain series, and don't support rfkill on others.
706 */
707 whitelisted = 0;
708 product = dmi_get_system_info(DMI_PRODUCT_NAME);
709 if (product && (strncmp(product, "Latitude", 8) == 0 ||
710 strncmp(product, "Precision", 9) == 0))
711 whitelisted = 1;
712 if (!force_rfkill && !whitelisted)
713 return 0;
714
715 dell_fill_request(&buffer, 0, 0, 0, 0);
716 ret = dell_send_request(&buffer, CLASS_INFO, SELECT_RFKILL);
717 status = buffer.output[1];
718
719 /* dell wireless info smbios call is not supported */
720 if (ret != 0)
721 return 0;
722
723 /* rfkill is only tested on laptops with a hwswitch */
724 if (!(status & BIT(0)) && !force_rfkill)
725 return 0;
726
727 if ((status & (1<<2|1<<8)) == (1<<2|1<<8)) {
728 wifi_rfkill = rfkill_alloc("dell-wifi", &platform_device->dev,
729 RFKILL_TYPE_WLAN,
730 &dell_rfkill_ops, (void *) 1);
731 if (!wifi_rfkill) {
732 ret = -ENOMEM;
733 goto err_wifi;
734 }
735 ret = rfkill_register(wifi_rfkill);
736 if (ret)
737 goto err_wifi;
738 }
739
740 if ((status & (1<<3|1<<9)) == (1<<3|1<<9)) {
741 bluetooth_rfkill = rfkill_alloc("dell-bluetooth",
742 &platform_device->dev,
743 RFKILL_TYPE_BLUETOOTH,
744 &dell_rfkill_ops, (void *) 2);
745 if (!bluetooth_rfkill) {
746 ret = -ENOMEM;
747 goto err_bluetooth;
748 }
749 ret = rfkill_register(bluetooth_rfkill);
750 if (ret)
751 goto err_bluetooth;
752 }
753
754 if ((status & (1<<4|1<<10)) == (1<<4|1<<10)) {
755 wwan_rfkill = rfkill_alloc("dell-wwan",
756 &platform_device->dev,
757 RFKILL_TYPE_WWAN,
758 &dell_rfkill_ops, (void *) 3);
759 if (!wwan_rfkill) {
760 ret = -ENOMEM;
761 goto err_wwan;
762 }
763 ret = rfkill_register(wwan_rfkill);
764 if (ret)
765 goto err_wwan;
766 }
767
768 /*
769 * Dell Airplane Mode Switch driver (dell-rbtn) supports ACPI devices
770 * which can receive events from HW slider switch.
771 *
772 * Dell SMBIOS on whitelisted models supports controlling radio devices
773 * but does not support receiving HW button switch events. We can use
774 * i8042 filter hook function to receive keyboard data and handle
775 * keycode for HW button.
776 *
777 * So if it is possible we will use Dell Airplane Mode Switch ACPI
778 * driver for receiving HW events and Dell SMBIOS for setting rfkill
779 * states. If ACPI driver or device is not available we will fallback to
780 * i8042 filter hook function.
781 *
782 * To prevent duplicate rfkill devices which control and do same thing,
783 * dell-rbtn driver will automatically remove its own rfkill devices
784 * once function dell_rbtn_notifier_register() is called.
785 */
786
787 dell_rbtn_notifier_register_func =
788 symbol_request(dell_rbtn_notifier_register);
789 if (dell_rbtn_notifier_register_func) {
790 dell_rbtn_notifier_unregister_func =
791 symbol_request(dell_rbtn_notifier_unregister);
792 if (!dell_rbtn_notifier_unregister_func) {
793 symbol_put(dell_rbtn_notifier_register);
794 dell_rbtn_notifier_register_func = NULL;
795 }
796 }
797
798 if (dell_rbtn_notifier_register_func) {
799 ret = dell_rbtn_notifier_register_func(
800 &dell_laptop_rbtn_notifier);
801 symbol_put(dell_rbtn_notifier_register);
802 dell_rbtn_notifier_register_func = NULL;
803 if (ret != 0) {
804 symbol_put(dell_rbtn_notifier_unregister);
805 dell_rbtn_notifier_unregister_func = NULL;
806 }
807 } else {
808 pr_info("Symbols from dell-rbtn acpi driver are not available\n");
809 ret = -ENODEV;
810 }
811
812 if (ret == 0) {
813 pr_info("Using dell-rbtn acpi driver for receiving events\n");
814 } else if (ret != -ENODEV) {
815 pr_warn("Unable to register dell rbtn notifier\n");
816 goto err_filter;
817 } else {
818 ret = i8042_install_filter(dell_laptop_i8042_filter);
819 if (ret) {
820 pr_warn("Unable to install key filter\n");
821 goto err_filter;
822 }
823 pr_info("Using i8042 filter function for receiving events\n");
824 }
825
826 return 0;
827 err_filter:
828 if (wwan_rfkill)
829 rfkill_unregister(wwan_rfkill);
830 err_wwan:
831 rfkill_destroy(wwan_rfkill);
832 if (bluetooth_rfkill)
833 rfkill_unregister(bluetooth_rfkill);
834 err_bluetooth:
835 rfkill_destroy(bluetooth_rfkill);
836 if (wifi_rfkill)
837 rfkill_unregister(wifi_rfkill);
838 err_wifi:
839 rfkill_destroy(wifi_rfkill);
840
841 return ret;
842 }
843
844 static void dell_cleanup_rfkill(void)
845 {
846 if (dell_rbtn_notifier_unregister_func) {
847 dell_rbtn_notifier_unregister_func(&dell_laptop_rbtn_notifier);
848 symbol_put(dell_rbtn_notifier_unregister);
849 dell_rbtn_notifier_unregister_func = NULL;
850 } else {
851 i8042_remove_filter(dell_laptop_i8042_filter);
852 }
853 cancel_delayed_work_sync(&dell_rfkill_work);
854 if (wifi_rfkill) {
855 rfkill_unregister(wifi_rfkill);
856 rfkill_destroy(wifi_rfkill);
857 }
858 if (bluetooth_rfkill) {
859 rfkill_unregister(bluetooth_rfkill);
860 rfkill_destroy(bluetooth_rfkill);
861 }
862 if (wwan_rfkill) {
863 rfkill_unregister(wwan_rfkill);
864 rfkill_destroy(wwan_rfkill);
865 }
866 }
867
868 static int dell_send_intensity(struct backlight_device *bd)
869 {
870 struct calling_interface_buffer buffer;
871 struct calling_interface_token *token;
872 int ret;
873
874 token = dell_smbios_find_token(BRIGHTNESS_TOKEN);
875 if (!token)
876 return -ENODEV;
877
878 dell_fill_request(&buffer,
879 token->location, bd->props.brightness, 0, 0);
880 if (power_supply_is_system_supplied() > 0)
881 ret = dell_send_request(&buffer,
882 CLASS_TOKEN_WRITE, SELECT_TOKEN_AC);
883 else
884 ret = dell_send_request(&buffer,
885 CLASS_TOKEN_WRITE, SELECT_TOKEN_BAT);
886
887 return ret;
888 }
889
890 static int dell_get_intensity(struct backlight_device *bd)
891 {
892 struct calling_interface_buffer buffer;
893 struct calling_interface_token *token;
894 int ret;
895
896 token = dell_smbios_find_token(BRIGHTNESS_TOKEN);
897 if (!token)
898 return -ENODEV;
899
900 dell_fill_request(&buffer, token->location, 0, 0, 0);
901 if (power_supply_is_system_supplied() > 0)
902 ret = dell_send_request(&buffer,
903 CLASS_TOKEN_READ, SELECT_TOKEN_AC);
904 else
905 ret = dell_send_request(&buffer,
906 CLASS_TOKEN_READ, SELECT_TOKEN_BAT);
907
908 if (ret == 0)
909 ret = buffer.output[1];
910
911 return ret;
912 }
913
914 static const struct backlight_ops dell_ops = {
915 .get_brightness = dell_get_intensity,
916 .update_status = dell_send_intensity,
917 };
918
919 static void touchpad_led_on(void)
920 {
921 int command = 0x97;
922 char data = 1;
923 i8042_command(&data, command | 1 << 12);
924 }
925
926 static void touchpad_led_off(void)
927 {
928 int command = 0x97;
929 char data = 2;
930 i8042_command(&data, command | 1 << 12);
931 }
932
933 static void touchpad_led_set(struct led_classdev *led_cdev,
934 enum led_brightness value)
935 {
936 if (value > 0)
937 touchpad_led_on();
938 else
939 touchpad_led_off();
940 }
941
942 static struct led_classdev touchpad_led = {
943 .name = "dell-laptop::touchpad",
944 .brightness_set = touchpad_led_set,
945 .flags = LED_CORE_SUSPENDRESUME,
946 };
947
948 static int __init touchpad_led_init(struct device *dev)
949 {
950 return led_classdev_register(dev, &touchpad_led);
951 }
952
953 static void touchpad_led_exit(void)
954 {
955 led_classdev_unregister(&touchpad_led);
956 }
957
958 /*
959 * Derived from information in smbios-keyboard-ctl:
960 *
961 * cbClass 4
962 * cbSelect 11
963 * Keyboard illumination
964 * cbArg1 determines the function to be performed
965 *
966 * cbArg1 0x0 = Get Feature Information
967 * cbRES1 Standard return codes (0, -1, -2)
968 * cbRES2, word0 Bitmap of user-selectable modes
969 * bit 0 Always off (All systems)
970 * bit 1 Always on (Travis ATG, Siberia)
971 * bit 2 Auto: ALS-based On; ALS-based Off (Travis ATG)
972 * bit 3 Auto: ALS- and input-activity-based On; input-activity based Off
973 * bit 4 Auto: Input-activity-based On; input-activity based Off
974 * bit 5 Auto: Input-activity-based On (illumination level 25%); input-activity based Off
975 * bit 6 Auto: Input-activity-based On (illumination level 50%); input-activity based Off
976 * bit 7 Auto: Input-activity-based On (illumination level 75%); input-activity based Off
977 * bit 8 Auto: Input-activity-based On (illumination level 100%); input-activity based Off
978 * bits 9-15 Reserved for future use
979 * cbRES2, byte2 Reserved for future use
980 * cbRES2, byte3 Keyboard illumination type
981 * 0 Reserved
982 * 1 Tasklight
983 * 2 Backlight
984 * 3-255 Reserved for future use
985 * cbRES3, byte0 Supported auto keyboard illumination trigger bitmap.
986 * bit 0 Any keystroke
987 * bit 1 Touchpad activity
988 * bit 2 Pointing stick
989 * bit 3 Any mouse
990 * bits 4-7 Reserved for future use
991 * cbRES3, byte1 Supported timeout unit bitmap
992 * bit 0 Seconds
993 * bit 1 Minutes
994 * bit 2 Hours
995 * bit 3 Days
996 * bits 4-7 Reserved for future use
997 * cbRES3, byte2 Number of keyboard light brightness levels
998 * cbRES4, byte0 Maximum acceptable seconds value (0 if seconds not supported).
999 * cbRES4, byte1 Maximum acceptable minutes value (0 if minutes not supported).
1000 * cbRES4, byte2 Maximum acceptable hours value (0 if hours not supported).
1001 * cbRES4, byte3 Maximum acceptable days value (0 if days not supported)
1002 *
1003 * cbArg1 0x1 = Get Current State
1004 * cbRES1 Standard return codes (0, -1, -2)
1005 * cbRES2, word0 Bitmap of current mode state
1006 * bit 0 Always off (All systems)
1007 * bit 1 Always on (Travis ATG, Siberia)
1008 * bit 2 Auto: ALS-based On; ALS-based Off (Travis ATG)
1009 * bit 3 Auto: ALS- and input-activity-based On; input-activity based Off
1010 * bit 4 Auto: Input-activity-based On; input-activity based Off
1011 * bit 5 Auto: Input-activity-based On (illumination level 25%); input-activity based Off
1012 * bit 6 Auto: Input-activity-based On (illumination level 50%); input-activity based Off
1013 * bit 7 Auto: Input-activity-based On (illumination level 75%); input-activity based Off
1014 * bit 8 Auto: Input-activity-based On (illumination level 100%); input-activity based Off
1015 * bits 9-15 Reserved for future use
1016 * Note: Only One bit can be set
1017 * cbRES2, byte2 Currently active auto keyboard illumination triggers.
1018 * bit 0 Any keystroke
1019 * bit 1 Touchpad activity
1020 * bit 2 Pointing stick
1021 * bit 3 Any mouse
1022 * bits 4-7 Reserved for future use
1023 * cbRES2, byte3 Current Timeout on battery
1024 * bits 7:6 Timeout units indicator:
1025 * 00b Seconds
1026 * 01b Minutes
1027 * 10b Hours
1028 * 11b Days
1029 * bits 5:0 Timeout value (0-63) in sec/min/hr/day
1030 * NOTE: A value of 0 means always on (no timeout) if any bits of RES3 byte
1031 * are set upon return from the [Get feature information] call.
1032 * cbRES3, byte0 Current setting of ALS value that turns the light on or off.
1033 * cbRES3, byte1 Current ALS reading
1034 * cbRES3, byte2 Current keyboard light level.
1035 * cbRES3, byte3 Current timeout on AC Power
1036 * bits 7:6 Timeout units indicator:
1037 * 00b Seconds
1038 * 01b Minutes
1039 * 10b Hours
1040 * 11b Days
1041 * Bits 5:0 Timeout value (0-63) in sec/min/hr/day
1042 * NOTE: A value of 0 means always on (no timeout) if any bits of RES3 byte2
1043 * are set upon return from the upon return from the [Get Feature information] call.
1044 *
1045 * cbArg1 0x2 = Set New State
1046 * cbRES1 Standard return codes (0, -1, -2)
1047 * cbArg2, word0 Bitmap of current mode state
1048 * bit 0 Always off (All systems)
1049 * bit 1 Always on (Travis ATG, Siberia)
1050 * bit 2 Auto: ALS-based On; ALS-based Off (Travis ATG)
1051 * bit 3 Auto: ALS- and input-activity-based On; input-activity based Off
1052 * bit 4 Auto: Input-activity-based On; input-activity based Off
1053 * bit 5 Auto: Input-activity-based On (illumination level 25%); input-activity based Off
1054 * bit 6 Auto: Input-activity-based On (illumination level 50%); input-activity based Off
1055 * bit 7 Auto: Input-activity-based On (illumination level 75%); input-activity based Off
1056 * bit 8 Auto: Input-activity-based On (illumination level 100%); input-activity based Off
1057 * bits 9-15 Reserved for future use
1058 * Note: Only One bit can be set
1059 * cbArg2, byte2 Desired auto keyboard illumination triggers. Must remain inactive to allow
1060 * keyboard to turn off automatically.
1061 * bit 0 Any keystroke
1062 * bit 1 Touchpad activity
1063 * bit 2 Pointing stick
1064 * bit 3 Any mouse
1065 * bits 4-7 Reserved for future use
1066 * cbArg2, byte3 Desired Timeout on battery
1067 * bits 7:6 Timeout units indicator:
1068 * 00b Seconds
1069 * 01b Minutes
1070 * 10b Hours
1071 * 11b Days
1072 * bits 5:0 Timeout value (0-63) in sec/min/hr/day
1073 * cbArg3, byte0 Desired setting of ALS value that turns the light on or off.
1074 * cbArg3, byte2 Desired keyboard light level.
1075 * cbArg3, byte3 Desired Timeout on AC power
1076 * bits 7:6 Timeout units indicator:
1077 * 00b Seconds
1078 * 01b Minutes
1079 * 10b Hours
1080 * 11b Days
1081 * bits 5:0 Timeout value (0-63) in sec/min/hr/day
1082 */
1083
1084
1085 enum kbd_timeout_unit {
1086 KBD_TIMEOUT_SECONDS = 0,
1087 KBD_TIMEOUT_MINUTES,
1088 KBD_TIMEOUT_HOURS,
1089 KBD_TIMEOUT_DAYS,
1090 };
1091
1092 enum kbd_mode_bit {
1093 KBD_MODE_BIT_OFF = 0,
1094 KBD_MODE_BIT_ON,
1095 KBD_MODE_BIT_ALS,
1096 KBD_MODE_BIT_TRIGGER_ALS,
1097 KBD_MODE_BIT_TRIGGER,
1098 KBD_MODE_BIT_TRIGGER_25,
1099 KBD_MODE_BIT_TRIGGER_50,
1100 KBD_MODE_BIT_TRIGGER_75,
1101 KBD_MODE_BIT_TRIGGER_100,
1102 };
1103
1104 #define kbd_is_als_mode_bit(bit) \
1105 ((bit) == KBD_MODE_BIT_ALS || (bit) == KBD_MODE_BIT_TRIGGER_ALS)
1106 #define kbd_is_trigger_mode_bit(bit) \
1107 ((bit) >= KBD_MODE_BIT_TRIGGER_ALS && (bit) <= KBD_MODE_BIT_TRIGGER_100)
1108 #define kbd_is_level_mode_bit(bit) \
1109 ((bit) >= KBD_MODE_BIT_TRIGGER_25 && (bit) <= KBD_MODE_BIT_TRIGGER_100)
1110
1111 struct kbd_info {
1112 u16 modes;
1113 u8 type;
1114 u8 triggers;
1115 u8 levels;
1116 u8 seconds;
1117 u8 minutes;
1118 u8 hours;
1119 u8 days;
1120 };
1121
1122 struct kbd_state {
1123 u8 mode_bit;
1124 u8 triggers;
1125 u8 timeout_value;
1126 u8 timeout_unit;
1127 u8 timeout_value_ac;
1128 u8 timeout_unit_ac;
1129 u8 als_setting;
1130 u8 als_value;
1131 u8 level;
1132 };
1133
1134 static const int kbd_tokens[] = {
1135 KBD_LED_OFF_TOKEN,
1136 KBD_LED_AUTO_25_TOKEN,
1137 KBD_LED_AUTO_50_TOKEN,
1138 KBD_LED_AUTO_75_TOKEN,
1139 KBD_LED_AUTO_100_TOKEN,
1140 KBD_LED_ON_TOKEN,
1141 };
1142
1143 static u16 kbd_token_bits;
1144
1145 static struct kbd_info kbd_info;
1146 static bool kbd_als_supported;
1147 static bool kbd_triggers_supported;
1148 static bool kbd_timeout_ac_supported;
1149
1150 static u8 kbd_mode_levels[16];
1151 static int kbd_mode_levels_count;
1152
1153 static u8 kbd_previous_level;
1154 static u8 kbd_previous_mode_bit;
1155
1156 static bool kbd_led_present;
1157 static DEFINE_MUTEX(kbd_led_mutex);
1158 static enum led_brightness kbd_led_level;
1159
1160 /*
1161 * NOTE: there are three ways to set the keyboard backlight level.
1162 * First, via kbd_state.mode_bit (assigning KBD_MODE_BIT_TRIGGER_* value).
1163 * Second, via kbd_state.level (assigning numerical value <= kbd_info.levels).
1164 * Third, via SMBIOS tokens (KBD_LED_* in kbd_tokens)
1165 *
1166 * There are laptops which support only one of these methods. If we want to
1167 * support as many machines as possible we need to implement all three methods.
1168 * The first two methods use the kbd_state structure. The third uses SMBIOS
1169 * tokens. If kbd_info.levels == 0, the machine does not support setting the
1170 * keyboard backlight level via kbd_state.level.
1171 */
1172
1173 static int kbd_get_info(struct kbd_info *info)
1174 {
1175 struct calling_interface_buffer buffer;
1176 u8 units;
1177 int ret;
1178
1179 dell_fill_request(&buffer, 0, 0, 0, 0);
1180 ret = dell_send_request(&buffer,
1181 CLASS_KBD_BACKLIGHT, SELECT_KBD_BACKLIGHT);
1182 if (ret)
1183 return ret;
1184
1185 info->modes = buffer.output[1] & 0xFFFF;
1186 info->type = (buffer.output[1] >> 24) & 0xFF;
1187 info->triggers = buffer.output[2] & 0xFF;
1188 units = (buffer.output[2] >> 8) & 0xFF;
1189 info->levels = (buffer.output[2] >> 16) & 0xFF;
1190
1191 if (quirks && quirks->kbd_led_levels_off_1 && info->levels)
1192 info->levels--;
1193
1194 if (units & BIT(0))
1195 info->seconds = (buffer.output[3] >> 0) & 0xFF;
1196 if (units & BIT(1))
1197 info->minutes = (buffer.output[3] >> 8) & 0xFF;
1198 if (units & BIT(2))
1199 info->hours = (buffer.output[3] >> 16) & 0xFF;
1200 if (units & BIT(3))
1201 info->days = (buffer.output[3] >> 24) & 0xFF;
1202
1203 return ret;
1204 }
1205
1206 static unsigned int kbd_get_max_level(void)
1207 {
1208 if (kbd_info.levels != 0)
1209 return kbd_info.levels;
1210 if (kbd_mode_levels_count > 0)
1211 return kbd_mode_levels_count - 1;
1212 return 0;
1213 }
1214
1215 static int kbd_get_level(struct kbd_state *state)
1216 {
1217 int i;
1218
1219 if (kbd_info.levels != 0)
1220 return state->level;
1221
1222 if (kbd_mode_levels_count > 0) {
1223 for (i = 0; i < kbd_mode_levels_count; ++i)
1224 if (kbd_mode_levels[i] == state->mode_bit)
1225 return i;
1226 return 0;
1227 }
1228
1229 return -EINVAL;
1230 }
1231
1232 static int kbd_set_level(struct kbd_state *state, u8 level)
1233 {
1234 if (kbd_info.levels != 0) {
1235 if (level != 0)
1236 kbd_previous_level = level;
1237 if (state->level == level)
1238 return 0;
1239 state->level = level;
1240 if (level != 0 && state->mode_bit == KBD_MODE_BIT_OFF)
1241 state->mode_bit = kbd_previous_mode_bit;
1242 else if (level == 0 && state->mode_bit != KBD_MODE_BIT_OFF) {
1243 kbd_previous_mode_bit = state->mode_bit;
1244 state->mode_bit = KBD_MODE_BIT_OFF;
1245 }
1246 return 0;
1247 }
1248
1249 if (kbd_mode_levels_count > 0 && level < kbd_mode_levels_count) {
1250 if (level != 0)
1251 kbd_previous_level = level;
1252 state->mode_bit = kbd_mode_levels[level];
1253 return 0;
1254 }
1255
1256 return -EINVAL;
1257 }
1258
1259 static int kbd_get_state(struct kbd_state *state)
1260 {
1261 struct calling_interface_buffer buffer;
1262 int ret;
1263
1264 dell_fill_request(&buffer, 0x1, 0, 0, 0);
1265 ret = dell_send_request(&buffer,
1266 CLASS_KBD_BACKLIGHT, SELECT_KBD_BACKLIGHT);
1267 if (ret)
1268 return ret;
1269
1270 state->mode_bit = ffs(buffer.output[1] & 0xFFFF);
1271 if (state->mode_bit != 0)
1272 state->mode_bit--;
1273
1274 state->triggers = (buffer.output[1] >> 16) & 0xFF;
1275 state->timeout_value = (buffer.output[1] >> 24) & 0x3F;
1276 state->timeout_unit = (buffer.output[1] >> 30) & 0x3;
1277 state->als_setting = buffer.output[2] & 0xFF;
1278 state->als_value = (buffer.output[2] >> 8) & 0xFF;
1279 state->level = (buffer.output[2] >> 16) & 0xFF;
1280 state->timeout_value_ac = (buffer.output[2] >> 24) & 0x3F;
1281 state->timeout_unit_ac = (buffer.output[2] >> 30) & 0x3;
1282
1283 return ret;
1284 }
1285
1286 static int kbd_set_state(struct kbd_state *state)
1287 {
1288 struct calling_interface_buffer buffer;
1289 int ret;
1290 u32 input1;
1291 u32 input2;
1292
1293 input1 = BIT(state->mode_bit) & 0xFFFF;
1294 input1 |= (state->triggers & 0xFF) << 16;
1295 input1 |= (state->timeout_value & 0x3F) << 24;
1296 input1 |= (state->timeout_unit & 0x3) << 30;
1297 input2 = state->als_setting & 0xFF;
1298 input2 |= (state->level & 0xFF) << 16;
1299 input2 |= (state->timeout_value_ac & 0x3F) << 24;
1300 input2 |= (state->timeout_unit_ac & 0x3) << 30;
1301 dell_fill_request(&buffer, 0x2, input1, input2, 0);
1302 ret = dell_send_request(&buffer,
1303 CLASS_KBD_BACKLIGHT, SELECT_KBD_BACKLIGHT);
1304
1305 return ret;
1306 }
1307
1308 static int kbd_set_state_safe(struct kbd_state *state, struct kbd_state *old)
1309 {
1310 int ret;
1311
1312 ret = kbd_set_state(state);
1313 if (ret == 0)
1314 return 0;
1315
1316 /*
1317 * When setting the new state fails,try to restore the previous one.
1318 * This is needed on some machines where BIOS sets a default state when
1319 * setting a new state fails. This default state could be all off.
1320 */
1321
1322 if (kbd_set_state(old))
1323 pr_err("Setting old previous keyboard state failed\n");
1324
1325 return ret;
1326 }
1327
1328 static int kbd_set_token_bit(u8 bit)
1329 {
1330 struct calling_interface_buffer buffer;
1331 struct calling_interface_token *token;
1332 int ret;
1333
1334 if (bit >= ARRAY_SIZE(kbd_tokens))
1335 return -EINVAL;
1336
1337 token = dell_smbios_find_token(kbd_tokens[bit]);
1338 if (!token)
1339 return -EINVAL;
1340
1341 dell_fill_request(&buffer, token->location, token->value, 0, 0);
1342 ret = dell_send_request(&buffer, CLASS_TOKEN_WRITE, SELECT_TOKEN_STD);
1343
1344 return ret;
1345 }
1346
1347 static int kbd_get_token_bit(u8 bit)
1348 {
1349 struct calling_interface_buffer buffer;
1350 struct calling_interface_token *token;
1351 int ret;
1352 int val;
1353
1354 if (bit >= ARRAY_SIZE(kbd_tokens))
1355 return -EINVAL;
1356
1357 token = dell_smbios_find_token(kbd_tokens[bit]);
1358 if (!token)
1359 return -EINVAL;
1360
1361 dell_fill_request(&buffer, token->location, 0, 0, 0);
1362 ret = dell_send_request(&buffer, CLASS_TOKEN_READ, SELECT_TOKEN_STD);
1363 val = buffer.output[1];
1364
1365 if (ret)
1366 return ret;
1367
1368 return (val == token->value);
1369 }
1370
1371 static int kbd_get_first_active_token_bit(void)
1372 {
1373 int i;
1374 int ret;
1375
1376 for (i = 0; i < ARRAY_SIZE(kbd_tokens); ++i) {
1377 ret = kbd_get_token_bit(i);
1378 if (ret == 1)
1379 return i;
1380 }
1381
1382 return ret;
1383 }
1384
1385 static int kbd_get_valid_token_counts(void)
1386 {
1387 return hweight16(kbd_token_bits);
1388 }
1389
1390 static inline int kbd_init_info(void)
1391 {
1392 struct kbd_state state;
1393 int ret;
1394 int i;
1395
1396 ret = kbd_get_info(&kbd_info);
1397 if (ret)
1398 return ret;
1399
1400 /* NOTE: Old models without KBD_LED_AC_TOKEN token supports only one
1401 * timeout value which is shared for both battery and AC power
1402 * settings. So do not try to set AC values on old models.
1403 */
1404 if (dell_smbios_find_token(KBD_LED_AC_TOKEN))
1405 kbd_timeout_ac_supported = true;
1406
1407 kbd_get_state(&state);
1408
1409 /* NOTE: timeout value is stored in 6 bits so max value is 63 */
1410 if (kbd_info.seconds > 63)
1411 kbd_info.seconds = 63;
1412 if (kbd_info.minutes > 63)
1413 kbd_info.minutes = 63;
1414 if (kbd_info.hours > 63)
1415 kbd_info.hours = 63;
1416 if (kbd_info.days > 63)
1417 kbd_info.days = 63;
1418
1419 /* NOTE: On tested machines ON mode did not work and caused
1420 * problems (turned backlight off) so do not use it
1421 */
1422 kbd_info.modes &= ~BIT(KBD_MODE_BIT_ON);
1423
1424 kbd_previous_level = kbd_get_level(&state);
1425 kbd_previous_mode_bit = state.mode_bit;
1426
1427 if (kbd_previous_level == 0 && kbd_get_max_level() != 0)
1428 kbd_previous_level = 1;
1429
1430 if (kbd_previous_mode_bit == KBD_MODE_BIT_OFF) {
1431 kbd_previous_mode_bit =
1432 ffs(kbd_info.modes & ~BIT(KBD_MODE_BIT_OFF));
1433 if (kbd_previous_mode_bit != 0)
1434 kbd_previous_mode_bit--;
1435 }
1436
1437 if (kbd_info.modes & (BIT(KBD_MODE_BIT_ALS) |
1438 BIT(KBD_MODE_BIT_TRIGGER_ALS)))
1439 kbd_als_supported = true;
1440
1441 if (kbd_info.modes & (
1442 BIT(KBD_MODE_BIT_TRIGGER_ALS) | BIT(KBD_MODE_BIT_TRIGGER) |
1443 BIT(KBD_MODE_BIT_TRIGGER_25) | BIT(KBD_MODE_BIT_TRIGGER_50) |
1444 BIT(KBD_MODE_BIT_TRIGGER_75) | BIT(KBD_MODE_BIT_TRIGGER_100)
1445 ))
1446 kbd_triggers_supported = true;
1447
1448 /* kbd_mode_levels[0] is reserved, see below */
1449 for (i = 0; i < 16; ++i)
1450 if (kbd_is_level_mode_bit(i) && (BIT(i) & kbd_info.modes))
1451 kbd_mode_levels[1 + kbd_mode_levels_count++] = i;
1452
1453 /*
1454 * Find the first supported mode and assign to kbd_mode_levels[0].
1455 * This should be 0 (off), but we cannot depend on the BIOS to
1456 * support 0.
1457 */
1458 if (kbd_mode_levels_count > 0) {
1459 for (i = 0; i < 16; ++i) {
1460 if (BIT(i) & kbd_info.modes) {
1461 kbd_mode_levels[0] = i;
1462 break;
1463 }
1464 }
1465 kbd_mode_levels_count++;
1466 }
1467
1468 return 0;
1469
1470 }
1471
1472 static inline void kbd_init_tokens(void)
1473 {
1474 int i;
1475
1476 for (i = 0; i < ARRAY_SIZE(kbd_tokens); ++i)
1477 if (dell_smbios_find_token(kbd_tokens[i]))
1478 kbd_token_bits |= BIT(i);
1479 }
1480
1481 static void kbd_init(void)
1482 {
1483 int ret;
1484
1485 ret = kbd_init_info();
1486 kbd_init_tokens();
1487
1488 /*
1489 * Only supports keyboard backlight when it has at least two modes.
1490 */
1491 if ((ret == 0 && (kbd_info.levels != 0 || kbd_mode_levels_count >= 2))
1492 || kbd_get_valid_token_counts() >= 2)
1493 kbd_led_present = true;
1494 }
1495
1496 static ssize_t kbd_led_timeout_store(struct device *dev,
1497 struct device_attribute *attr,
1498 const char *buf, size_t count)
1499 {
1500 struct kbd_state new_state;
1501 struct kbd_state state;
1502 bool convert;
1503 int value;
1504 int ret;
1505 char ch;
1506 u8 unit;
1507 int i;
1508
1509 ret = sscanf(buf, "%d %c", &value, &ch);
1510 if (ret < 1)
1511 return -EINVAL;
1512 else if (ret == 1)
1513 ch = 's';
1514
1515 if (value < 0)
1516 return -EINVAL;
1517
1518 convert = false;
1519
1520 switch (ch) {
1521 case 's':
1522 if (value > kbd_info.seconds)
1523 convert = true;
1524 unit = KBD_TIMEOUT_SECONDS;
1525 break;
1526 case 'm':
1527 if (value > kbd_info.minutes)
1528 convert = true;
1529 unit = KBD_TIMEOUT_MINUTES;
1530 break;
1531 case 'h':
1532 if (value > kbd_info.hours)
1533 convert = true;
1534 unit = KBD_TIMEOUT_HOURS;
1535 break;
1536 case 'd':
1537 if (value > kbd_info.days)
1538 convert = true;
1539 unit = KBD_TIMEOUT_DAYS;
1540 break;
1541 default:
1542 return -EINVAL;
1543 }
1544
1545 if (quirks && quirks->needs_kbd_timeouts)
1546 convert = true;
1547
1548 if (convert) {
1549 /* Convert value from current units to seconds */
1550 switch (unit) {
1551 case KBD_TIMEOUT_DAYS:
1552 value *= 24;
1553 case KBD_TIMEOUT_HOURS:
1554 value *= 60;
1555 case KBD_TIMEOUT_MINUTES:
1556 value *= 60;
1557 unit = KBD_TIMEOUT_SECONDS;
1558 }
1559
1560 if (quirks && quirks->needs_kbd_timeouts) {
1561 for (i = 0; quirks->kbd_timeouts[i] != -1; i++) {
1562 if (value <= quirks->kbd_timeouts[i]) {
1563 value = quirks->kbd_timeouts[i];
1564 break;
1565 }
1566 }
1567 }
1568
1569 if (value <= kbd_info.seconds && kbd_info.seconds) {
1570 unit = KBD_TIMEOUT_SECONDS;
1571 } else if (value / 60 <= kbd_info.minutes && kbd_info.minutes) {
1572 value /= 60;
1573 unit = KBD_TIMEOUT_MINUTES;
1574 } else if (value / (60 * 60) <= kbd_info.hours && kbd_info.hours) {
1575 value /= (60 * 60);
1576 unit = KBD_TIMEOUT_HOURS;
1577 } else if (value / (60 * 60 * 24) <= kbd_info.days && kbd_info.days) {
1578 value /= (60 * 60 * 24);
1579 unit = KBD_TIMEOUT_DAYS;
1580 } else {
1581 return -EINVAL;
1582 }
1583 }
1584
1585 mutex_lock(&kbd_led_mutex);
1586
1587 ret = kbd_get_state(&state);
1588 if (ret)
1589 goto out;
1590
1591 new_state = state;
1592
1593 if (kbd_timeout_ac_supported && power_supply_is_system_supplied() > 0) {
1594 new_state.timeout_value_ac = value;
1595 new_state.timeout_unit_ac = unit;
1596 } else {
1597 new_state.timeout_value = value;
1598 new_state.timeout_unit = unit;
1599 }
1600
1601 ret = kbd_set_state_safe(&new_state, &state);
1602 if (ret)
1603 goto out;
1604
1605 ret = count;
1606 out:
1607 mutex_unlock(&kbd_led_mutex);
1608 return ret;
1609 }
1610
1611 static ssize_t kbd_led_timeout_show(struct device *dev,
1612 struct device_attribute *attr, char *buf)
1613 {
1614 struct kbd_state state;
1615 int value;
1616 int ret;
1617 int len;
1618 u8 unit;
1619
1620 ret = kbd_get_state(&state);
1621 if (ret)
1622 return ret;
1623
1624 if (kbd_timeout_ac_supported && power_supply_is_system_supplied() > 0) {
1625 value = state.timeout_value_ac;
1626 unit = state.timeout_unit_ac;
1627 } else {
1628 value = state.timeout_value;
1629 unit = state.timeout_unit;
1630 }
1631
1632 len = sprintf(buf, "%d", value);
1633
1634 switch (unit) {
1635 case KBD_TIMEOUT_SECONDS:
1636 return len + sprintf(buf+len, "s\n");
1637 case KBD_TIMEOUT_MINUTES:
1638 return len + sprintf(buf+len, "m\n");
1639 case KBD_TIMEOUT_HOURS:
1640 return len + sprintf(buf+len, "h\n");
1641 case KBD_TIMEOUT_DAYS:
1642 return len + sprintf(buf+len, "d\n");
1643 default:
1644 return -EINVAL;
1645 }
1646
1647 return len;
1648 }
1649
1650 static DEVICE_ATTR(stop_timeout, S_IRUGO | S_IWUSR,
1651 kbd_led_timeout_show, kbd_led_timeout_store);
1652
1653 static const char * const kbd_led_triggers[] = {
1654 "keyboard",
1655 "touchpad",
1656 /*"trackstick"*/ NULL, /* NOTE: trackstick is just alias for touchpad */
1657 "mouse",
1658 };
1659
1660 static ssize_t kbd_led_triggers_store(struct device *dev,
1661 struct device_attribute *attr,
1662 const char *buf, size_t count)
1663 {
1664 struct kbd_state new_state;
1665 struct kbd_state state;
1666 bool triggers_enabled = false;
1667 int trigger_bit = -1;
1668 char trigger[21];
1669 int i, ret;
1670
1671 ret = sscanf(buf, "%20s", trigger);
1672 if (ret != 1)
1673 return -EINVAL;
1674
1675 if (trigger[0] != '+' && trigger[0] != '-')
1676 return -EINVAL;
1677
1678 mutex_lock(&kbd_led_mutex);
1679
1680 ret = kbd_get_state(&state);
1681 if (ret)
1682 goto out;
1683
1684 if (kbd_triggers_supported)
1685 triggers_enabled = kbd_is_trigger_mode_bit(state.mode_bit);
1686
1687 if (kbd_triggers_supported) {
1688 for (i = 0; i < ARRAY_SIZE(kbd_led_triggers); ++i) {
1689 if (!(kbd_info.triggers & BIT(i)))
1690 continue;
1691 if (!kbd_led_triggers[i])
1692 continue;
1693 if (strcmp(trigger+1, kbd_led_triggers[i]) != 0)
1694 continue;
1695 if (trigger[0] == '+' &&
1696 triggers_enabled && (state.triggers & BIT(i))) {
1697 ret = count;
1698 goto out;
1699 }
1700 if (trigger[0] == '-' &&
1701 (!triggers_enabled || !(state.triggers & BIT(i)))) {
1702 ret = count;
1703 goto out;
1704 }
1705 trigger_bit = i;
1706 break;
1707 }
1708 }
1709
1710 if (trigger_bit == -1) {
1711 ret = -EINVAL;
1712 goto out;
1713 }
1714
1715 new_state = state;
1716 if (trigger[0] == '+')
1717 new_state.triggers |= BIT(trigger_bit);
1718 else {
1719 new_state.triggers &= ~BIT(trigger_bit);
1720 /*
1721 * NOTE: trackstick bit (2) must be disabled when
1722 * disabling touchpad bit (1), otherwise touchpad
1723 * bit (1) will not be disabled
1724 */
1725 if (trigger_bit == 1)
1726 new_state.triggers &= ~BIT(2);
1727 }
1728 if ((kbd_info.triggers & new_state.triggers) !=
1729 new_state.triggers) {
1730 ret = -EINVAL;
1731 goto out;
1732 }
1733 if (new_state.triggers && !triggers_enabled) {
1734 new_state.mode_bit = KBD_MODE_BIT_TRIGGER;
1735 kbd_set_level(&new_state, kbd_previous_level);
1736 } else if (new_state.triggers == 0) {
1737 kbd_set_level(&new_state, 0);
1738 }
1739 if (!(kbd_info.modes & BIT(new_state.mode_bit))) {
1740 ret = -EINVAL;
1741 goto out;
1742 }
1743 ret = kbd_set_state_safe(&new_state, &state);
1744 if (ret)
1745 goto out;
1746 if (new_state.mode_bit != KBD_MODE_BIT_OFF)
1747 kbd_previous_mode_bit = new_state.mode_bit;
1748 ret = count;
1749 out:
1750 mutex_unlock(&kbd_led_mutex);
1751 return ret;
1752 }
1753
1754 static ssize_t kbd_led_triggers_show(struct device *dev,
1755 struct device_attribute *attr, char *buf)
1756 {
1757 struct kbd_state state;
1758 bool triggers_enabled;
1759 int level, i, ret;
1760 int len = 0;
1761
1762 ret = kbd_get_state(&state);
1763 if (ret)
1764 return ret;
1765
1766 len = 0;
1767
1768 if (kbd_triggers_supported) {
1769 triggers_enabled = kbd_is_trigger_mode_bit(state.mode_bit);
1770 level = kbd_get_level(&state);
1771 for (i = 0; i < ARRAY_SIZE(kbd_led_triggers); ++i) {
1772 if (!(kbd_info.triggers & BIT(i)))
1773 continue;
1774 if (!kbd_led_triggers[i])
1775 continue;
1776 if ((triggers_enabled || level <= 0) &&
1777 (state.triggers & BIT(i)))
1778 buf[len++] = '+';
1779 else
1780 buf[len++] = '-';
1781 len += sprintf(buf+len, "%s ", kbd_led_triggers[i]);
1782 }
1783 }
1784
1785 if (len)
1786 buf[len - 1] = '\n';
1787
1788 return len;
1789 }
1790
1791 static DEVICE_ATTR(start_triggers, S_IRUGO | S_IWUSR,
1792 kbd_led_triggers_show, kbd_led_triggers_store);
1793
1794 static ssize_t kbd_led_als_enabled_store(struct device *dev,
1795 struct device_attribute *attr,
1796 const char *buf, size_t count)
1797 {
1798 struct kbd_state new_state;
1799 struct kbd_state state;
1800 bool triggers_enabled = false;
1801 int enable;
1802 int ret;
1803
1804 ret = kstrtoint(buf, 0, &enable);
1805 if (ret)
1806 return ret;
1807
1808 mutex_lock(&kbd_led_mutex);
1809
1810 ret = kbd_get_state(&state);
1811 if (ret)
1812 goto out;
1813
1814 if (enable == kbd_is_als_mode_bit(state.mode_bit)) {
1815 ret = count;
1816 goto out;
1817 }
1818
1819 new_state = state;
1820
1821 if (kbd_triggers_supported)
1822 triggers_enabled = kbd_is_trigger_mode_bit(state.mode_bit);
1823
1824 if (enable) {
1825 if (triggers_enabled)
1826 new_state.mode_bit = KBD_MODE_BIT_TRIGGER_ALS;
1827 else
1828 new_state.mode_bit = KBD_MODE_BIT_ALS;
1829 } else {
1830 if (triggers_enabled) {
1831 new_state.mode_bit = KBD_MODE_BIT_TRIGGER;
1832 kbd_set_level(&new_state, kbd_previous_level);
1833 } else {
1834 new_state.mode_bit = KBD_MODE_BIT_ON;
1835 }
1836 }
1837 if (!(kbd_info.modes & BIT(new_state.mode_bit))) {
1838 ret = -EINVAL;
1839 goto out;
1840 }
1841
1842 ret = kbd_set_state_safe(&new_state, &state);
1843 if (ret)
1844 goto out;
1845 kbd_previous_mode_bit = new_state.mode_bit;
1846
1847 ret = count;
1848 out:
1849 mutex_unlock(&kbd_led_mutex);
1850 return ret;
1851 }
1852
1853 static ssize_t kbd_led_als_enabled_show(struct device *dev,
1854 struct device_attribute *attr,
1855 char *buf)
1856 {
1857 struct kbd_state state;
1858 bool enabled = false;
1859 int ret;
1860
1861 ret = kbd_get_state(&state);
1862 if (ret)
1863 return ret;
1864 enabled = kbd_is_als_mode_bit(state.mode_bit);
1865
1866 return sprintf(buf, "%d\n", enabled ? 1 : 0);
1867 }
1868
1869 static DEVICE_ATTR(als_enabled, S_IRUGO | S_IWUSR,
1870 kbd_led_als_enabled_show, kbd_led_als_enabled_store);
1871
1872 static ssize_t kbd_led_als_setting_store(struct device *dev,
1873 struct device_attribute *attr,
1874 const char *buf, size_t count)
1875 {
1876 struct kbd_state state;
1877 struct kbd_state new_state;
1878 u8 setting;
1879 int ret;
1880
1881 ret = kstrtou8(buf, 10, &setting);
1882 if (ret)
1883 return ret;
1884
1885 mutex_lock(&kbd_led_mutex);
1886
1887 ret = kbd_get_state(&state);
1888 if (ret)
1889 goto out;
1890
1891 new_state = state;
1892 new_state.als_setting = setting;
1893
1894 ret = kbd_set_state_safe(&new_state, &state);
1895 if (ret)
1896 goto out;
1897
1898 ret = count;
1899 out:
1900 mutex_unlock(&kbd_led_mutex);
1901 return ret;
1902 }
1903
1904 static ssize_t kbd_led_als_setting_show(struct device *dev,
1905 struct device_attribute *attr,
1906 char *buf)
1907 {
1908 struct kbd_state state;
1909 int ret;
1910
1911 ret = kbd_get_state(&state);
1912 if (ret)
1913 return ret;
1914
1915 return sprintf(buf, "%d\n", state.als_setting);
1916 }
1917
1918 static DEVICE_ATTR(als_setting, S_IRUGO | S_IWUSR,
1919 kbd_led_als_setting_show, kbd_led_als_setting_store);
1920
1921 static struct attribute *kbd_led_attrs[] = {
1922 &dev_attr_stop_timeout.attr,
1923 &dev_attr_start_triggers.attr,
1924 NULL,
1925 };
1926
1927 static const struct attribute_group kbd_led_group = {
1928 .attrs = kbd_led_attrs,
1929 };
1930
1931 static struct attribute *kbd_led_als_attrs[] = {
1932 &dev_attr_als_enabled.attr,
1933 &dev_attr_als_setting.attr,
1934 NULL,
1935 };
1936
1937 static const struct attribute_group kbd_led_als_group = {
1938 .attrs = kbd_led_als_attrs,
1939 };
1940
1941 static const struct attribute_group *kbd_led_groups[] = {
1942 &kbd_led_group,
1943 &kbd_led_als_group,
1944 NULL,
1945 };
1946
1947 static enum led_brightness kbd_led_level_get(struct led_classdev *led_cdev)
1948 {
1949 int ret;
1950 u16 num;
1951 struct kbd_state state;
1952
1953 if (kbd_get_max_level()) {
1954 ret = kbd_get_state(&state);
1955 if (ret)
1956 return 0;
1957 ret = kbd_get_level(&state);
1958 if (ret < 0)
1959 return 0;
1960 return ret;
1961 }
1962
1963 if (kbd_get_valid_token_counts()) {
1964 ret = kbd_get_first_active_token_bit();
1965 if (ret < 0)
1966 return 0;
1967 for (num = kbd_token_bits; num != 0 && ret > 0; --ret)
1968 num &= num - 1; /* clear the first bit set */
1969 if (num == 0)
1970 return 0;
1971 return ffs(num) - 1;
1972 }
1973
1974 pr_warn("Keyboard brightness level control not supported\n");
1975 return 0;
1976 }
1977
1978 static int kbd_led_level_set(struct led_classdev *led_cdev,
1979 enum led_brightness value)
1980 {
1981 enum led_brightness new_value = value;
1982 struct kbd_state state;
1983 struct kbd_state new_state;
1984 u16 num;
1985 int ret;
1986
1987 mutex_lock(&kbd_led_mutex);
1988
1989 if (kbd_get_max_level()) {
1990 ret = kbd_get_state(&state);
1991 if (ret)
1992 goto out;
1993 new_state = state;
1994 ret = kbd_set_level(&new_state, value);
1995 if (ret)
1996 goto out;
1997 ret = kbd_set_state_safe(&new_state, &state);
1998 } else if (kbd_get_valid_token_counts()) {
1999 for (num = kbd_token_bits; num != 0 && value > 0; --value)
2000 num &= num - 1; /* clear the first bit set */
2001 if (num == 0)
2002 ret = 0;
2003 else
2004 ret = kbd_set_token_bit(ffs(num) - 1);
2005 } else {
2006 pr_warn("Keyboard brightness level control not supported\n");
2007 ret = -ENXIO;
2008 }
2009
2010 out:
2011 if (ret == 0)
2012 kbd_led_level = new_value;
2013
2014 mutex_unlock(&kbd_led_mutex);
2015 return ret;
2016 }
2017
2018 static struct led_classdev kbd_led = {
2019 .name = "dell::kbd_backlight",
2020 .flags = LED_BRIGHT_HW_CHANGED,
2021 .brightness_set_blocking = kbd_led_level_set,
2022 .brightness_get = kbd_led_level_get,
2023 .groups = kbd_led_groups,
2024 };
2025
2026 static int __init kbd_led_init(struct device *dev)
2027 {
2028 int ret;
2029
2030 kbd_init();
2031 if (!kbd_led_present)
2032 return -ENODEV;
2033 if (!kbd_als_supported)
2034 kbd_led_groups[1] = NULL;
2035 kbd_led.max_brightness = kbd_get_max_level();
2036 if (!kbd_led.max_brightness) {
2037 kbd_led.max_brightness = kbd_get_valid_token_counts();
2038 if (kbd_led.max_brightness)
2039 kbd_led.max_brightness--;
2040 }
2041
2042 kbd_led_level = kbd_led_level_get(NULL);
2043
2044 ret = led_classdev_register(dev, &kbd_led);
2045 if (ret)
2046 kbd_led_present = false;
2047
2048 return ret;
2049 }
2050
2051 static void brightness_set_exit(struct led_classdev *led_cdev,
2052 enum led_brightness value)
2053 {
2054 /* Don't change backlight level on exit */
2055 };
2056
2057 static void kbd_led_exit(void)
2058 {
2059 if (!kbd_led_present)
2060 return;
2061 kbd_led.brightness_set = brightness_set_exit;
2062 led_classdev_unregister(&kbd_led);
2063 }
2064
2065 static int dell_laptop_notifier_call(struct notifier_block *nb,
2066 unsigned long action, void *data)
2067 {
2068 bool changed = false;
2069 enum led_brightness new_kbd_led_level;
2070
2071 switch (action) {
2072 case DELL_LAPTOP_KBD_BACKLIGHT_BRIGHTNESS_CHANGED:
2073 if (!kbd_led_present)
2074 break;
2075
2076 mutex_lock(&kbd_led_mutex);
2077 new_kbd_led_level = kbd_led_level_get(&kbd_led);
2078 if (kbd_led_level != new_kbd_led_level) {
2079 kbd_led_level = new_kbd_led_level;
2080 changed = true;
2081 }
2082 mutex_unlock(&kbd_led_mutex);
2083
2084 if (changed)
2085 led_classdev_notify_brightness_hw_changed(&kbd_led,
2086 kbd_led_level);
2087 break;
2088 }
2089
2090 return NOTIFY_OK;
2091 }
2092
2093 static struct notifier_block dell_laptop_notifier = {
2094 .notifier_call = dell_laptop_notifier_call,
2095 };
2096
2097 int dell_micmute_led_set(int state)
2098 {
2099 struct calling_interface_buffer buffer;
2100 struct calling_interface_token *token;
2101
2102 if (state == 0)
2103 token = dell_smbios_find_token(GLOBAL_MIC_MUTE_DISABLE);
2104 else if (state == 1)
2105 token = dell_smbios_find_token(GLOBAL_MIC_MUTE_ENABLE);
2106 else
2107 return -EINVAL;
2108
2109 if (!token)
2110 return -ENODEV;
2111
2112 dell_fill_request(&buffer, token->location, token->value, 0, 0);
2113 dell_send_request(&buffer, CLASS_TOKEN_WRITE, SELECT_TOKEN_STD);
2114
2115 return state;
2116 }
2117 EXPORT_SYMBOL_GPL(dell_micmute_led_set);
2118
2119 static int __init dell_init(void)
2120 {
2121 struct calling_interface_token *token;
2122 int max_intensity = 0;
2123 int ret;
2124
2125 if (!dmi_check_system(dell_device_table))
2126 return -ENODEV;
2127
2128 quirks = NULL;
2129 /* find if this machine support other functions */
2130 dmi_check_system(dell_quirks);
2131
2132 ret = platform_driver_register(&platform_driver);
2133 if (ret)
2134 goto fail_platform_driver;
2135 platform_device = platform_device_alloc("dell-laptop", -1);
2136 if (!platform_device) {
2137 ret = -ENOMEM;
2138 goto fail_platform_device1;
2139 }
2140 ret = platform_device_add(platform_device);
2141 if (ret)
2142 goto fail_platform_device2;
2143
2144 ret = dell_setup_rfkill();
2145
2146 if (ret) {
2147 pr_warn("Unable to setup rfkill\n");
2148 goto fail_rfkill;
2149 }
2150
2151 if (quirks && quirks->touchpad_led)
2152 touchpad_led_init(&platform_device->dev);
2153
2154 kbd_led_init(&platform_device->dev);
2155
2156 dell_laptop_dir = debugfs_create_dir("dell_laptop", NULL);
2157 if (dell_laptop_dir != NULL)
2158 debugfs_create_file("rfkill", 0444, dell_laptop_dir, NULL,
2159 &dell_debugfs_fops);
2160
2161 dell_laptop_register_notifier(&dell_laptop_notifier);
2162
2163 if (acpi_video_get_backlight_type() != acpi_backlight_vendor)
2164 return 0;
2165
2166 token = dell_smbios_find_token(BRIGHTNESS_TOKEN);
2167 if (token) {
2168 struct calling_interface_buffer buffer;
2169
2170 dell_fill_request(&buffer, token->location, 0, 0, 0);
2171 ret = dell_send_request(&buffer,
2172 CLASS_TOKEN_READ, SELECT_TOKEN_AC);
2173 if (ret)
2174 max_intensity = buffer.output[3];
2175 }
2176
2177 if (max_intensity) {
2178 struct backlight_properties props;
2179 memset(&props, 0, sizeof(struct backlight_properties));
2180 props.type = BACKLIGHT_PLATFORM;
2181 props.max_brightness = max_intensity;
2182 dell_backlight_device = backlight_device_register("dell_backlight",
2183 &platform_device->dev,
2184 NULL,
2185 &dell_ops,
2186 &props);
2187
2188 if (IS_ERR(dell_backlight_device)) {
2189 ret = PTR_ERR(dell_backlight_device);
2190 dell_backlight_device = NULL;
2191 goto fail_backlight;
2192 }
2193
2194 dell_backlight_device->props.brightness =
2195 dell_get_intensity(dell_backlight_device);
2196 if (dell_backlight_device->props.brightness < 0) {
2197 ret = dell_backlight_device->props.brightness;
2198 goto fail_get_brightness;
2199 }
2200 backlight_update_status(dell_backlight_device);
2201 }
2202
2203 return 0;
2204
2205 fail_get_brightness:
2206 backlight_device_unregister(dell_backlight_device);
2207 fail_backlight:
2208 dell_cleanup_rfkill();
2209 fail_rfkill:
2210 platform_device_del(platform_device);
2211 fail_platform_device2:
2212 platform_device_put(platform_device);
2213 fail_platform_device1:
2214 platform_driver_unregister(&platform_driver);
2215 fail_platform_driver:
2216 return ret;
2217 }
2218
2219 static void __exit dell_exit(void)
2220 {
2221 dell_laptop_unregister_notifier(&dell_laptop_notifier);
2222 debugfs_remove_recursive(dell_laptop_dir);
2223 if (quirks && quirks->touchpad_led)
2224 touchpad_led_exit();
2225 kbd_led_exit();
2226 backlight_device_unregister(dell_backlight_device);
2227 dell_cleanup_rfkill();
2228 if (platform_device) {
2229 platform_device_unregister(platform_device);
2230 platform_driver_unregister(&platform_driver);
2231 }
2232 }
2233
2234 /* dell-rbtn.c driver export functions which will not work correctly (and could
2235 * cause kernel crash) if they are called before dell-rbtn.c init code. This is
2236 * not problem when dell-rbtn.c is compiled as external module. When both files
2237 * (dell-rbtn.c and dell-laptop.c) are compiled statically into kernel, then we
2238 * need to ensure that dell_init() will be called after initializing dell-rbtn.
2239 * This can be achieved by late_initcall() instead module_init().
2240 */
2241 late_initcall(dell_init);
2242 module_exit(dell_exit);
2243
2244 MODULE_AUTHOR("Matthew Garrett <mjg@redhat.com>");
2245 MODULE_AUTHOR("Gabriele Mazzotta <gabriele.mzt@gmail.com>");
2246 MODULE_AUTHOR("Pali Rohár <pali.rohar@gmail.com>");
2247 MODULE_DESCRIPTION("Dell laptop driver");
2248 MODULE_LICENSE("GPL");
CRIS linux kernel tree