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Merge tag 'ceph-for-4.14-rc7' of git://github.com/ceph/ceph-client
[mirror_ubuntu-bionic-kernel.git] / drivers / platform / x86 / dell-laptop.c
CommitLineData
ad8f07cc
MG		 1/*
2 * Driver for Dell laptop extras
3 *
4 * Copyright (c) Red Hat <mjg@redhat.com>
6cff8d60
GM		 5 * Copyright (c) 2014 Gabriele Mazzotta <gabriele.mzt@gmail.com>
6 * Copyright (c) 2014 Pali Rohár <pali.rohar@gmail.com>
ad8f07cc 7 *
6cff8d60
GM		 8 * Based on documentation in the libsmbios package:
9 * Copyright (C) 2005-2014 Dell Inc.
ad8f07cc
MG		 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
eb889524
JP		 16#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
17
ad8f07cc
MG		 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>
4cc8a574 26#include <linux/rfkill.h>
ad8f07cc
MG		 27#include <linux/power_supply.h>
28#include <linux/acpi.h>
116ee77b 29#include <linux/mm.h>
814cb8ad 30#include <linux/i8042.h>
037accfa 31#include <linux/debugfs.h>
44319ab7 32#include <linux/dell-led.h>
037accfa 33#include <linux/seq_file.h>
ee4cfe28 34#include <acpi/video.h>
f8358578 35#include "dell-rbtn.h"
2f9f26bd 36#include "dell-smbios.h"
ad8f07cc
MG		 37
38#define BRIGHTNESS_TOKEN 0x7d
6cff8d60
GM		 39#define KBD_LED_OFF_TOKEN 0x01E1
40#define KBD_LED_ON_TOKEN 0x01E2
41#define KBD_LED_AUTO_TOKEN 0x01E3
42#define KBD_LED_AUTO_25_TOKEN 0x02EA
43#define KBD_LED_AUTO_50_TOKEN 0x02EB
44#define KBD_LED_AUTO_75_TOKEN 0x02EC
45#define KBD_LED_AUTO_100_TOKEN 0x02F6
44319ab7
MK		 46#define GLOBAL_MIC_MUTE_ENABLE 0x0364
47#define GLOBAL_MIC_MUTE_DISABLE 0x0365
9216e0dc 48#define KBD_LED_AC_TOKEN 0x0451
ad8f07cc 49
2d8b90be
AK		 50struct quirk_entry {
51 u8 touchpad_led;
6cff8d60
GM		 52
53 int needs_kbd_timeouts;
54 /*
55 * Ordered list of timeouts expressed in seconds.
56 * The list must end with -1
57 */
58 int kbd_timeouts[];
2d8b90be
AK		 59};
60
61static struct quirk_entry *quirks;
62
63static struct quirk_entry quirk_dell_vostro_v130 = {
64 .touchpad_led = 1,
65};
66
681480cc 67static int __init dmi_matched(const struct dmi_system_id *dmi)
2d8b90be
AK		 68{
69 quirks = dmi->driver_data;
70 return 1;
71}
72
6cff8d60
GM		 73/*
74 * These values come from Windows utility provided by Dell. If any other value
75 * is used then BIOS silently set timeout to 0 without any error message.
76 */
77static struct quirk_entry quirk_dell_xps13_9333 = {
78 .needs_kbd_timeouts = 1,
79 .kbd_timeouts = { 0, 5, 15, 60, 5 * 60, 15 * 60, -1 },
80};
81
ada3248a
AJ		 82static struct platform_driver platform_driver = {
83 .driver = {
84 .name = "dell-laptop",
ada3248a
AJ		 85 }
86};
87
88static struct platform_device *platform_device;
ad8f07cc 89static struct backlight_device *dell_backlight_device;
4cc8a574
HG		 90static struct rfkill *wifi_rfkill;
91static struct rfkill *bluetooth_rfkill;
92static struct rfkill *wwan_rfkill;
8e0e668d
HG		 93static bool force_rfkill;
94
95module_param(force_rfkill, bool, 0444);
96MODULE_PARM_DESC(force_rfkill, "enable rfkill on non whitelisted models");
ad8f07cc 97
145047de 98static const struct dmi_system_id dell_device_table[] __initconst = {
ad8f07cc
MG		 99 {
100 .ident = "Dell laptop",
101 .matches = {
102 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
103 DMI_MATCH(DMI_CHASSIS_TYPE, "8"),
104 },
105 },
410d44c7
RK		 106 {
107 .matches = {
108 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
109 DMI_MATCH(DMI_CHASSIS_TYPE, "9"), /*Laptop*/
110 },
111 },
8d2c4538
AH		 112 {
113 .matches = {
114 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
115 DMI_MATCH(DMI_CHASSIS_TYPE, "10"), /*Notebook*/
116 },
117 },
cb6a7937
EA		 118 {
119 .ident = "Dell Computer Corporation",
120 .matches = {
121 DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer Corporation"),
122 DMI_MATCH(DMI_CHASSIS_TYPE, "8"),
123 },
124 },
ad8f07cc
MG		 125 { }
126};
35ae64fe 127MODULE_DEVICE_TABLE(dmi, dell_device_table);
ad8f07cc 128
681480cc 129static const struct dmi_system_id dell_quirks[] __initconst = {
2d8b90be
AK		 130 {
131 .callback = dmi_matched,
132 .ident = "Dell Vostro V130",
133 .matches = {
134 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
135 DMI_MATCH(DMI_PRODUCT_NAME, "Vostro V130"),
136 },
137 .driver_data = &quirk_dell_vostro_v130,
138 },
139 {
140 .callback = dmi_matched,
141 .ident = "Dell Vostro V131",
142 .matches = {
143 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
144 DMI_MATCH(DMI_PRODUCT_NAME, "Vostro V131"),
145 },
146 .driver_data = &quirk_dell_vostro_v130,
147 },
57b31b2f
AWC		 148 {
149 .callback = dmi_matched,
150 .ident = "Dell Vostro 3350",
151 .matches = {
152 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
153 DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 3350"),
154 },
155 .driver_data = &quirk_dell_vostro_v130,
156 },
2a748853
AK		 157 {
158 .callback = dmi_matched,
159 .ident = "Dell Vostro 3555",
160 .matches = {
161 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
162 DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 3555"),
163 },
164 .driver_data = &quirk_dell_vostro_v130,
165 },
166 {
167 .callback = dmi_matched,
168 .ident = "Dell Inspiron N311z",
169 .matches = {
170 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
171 DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron N311z"),
172 },
173 .driver_data = &quirk_dell_vostro_v130,
174 },
175 {
176 .callback = dmi_matched,
177 .ident = "Dell Inspiron M5110",
178 .matches = {
179 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
180 DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron M5110"),
181 },
182 .driver_data = &quirk_dell_vostro_v130,
183 },
7f839228
AK		 184 {
185 .callback = dmi_matched,
186 .ident = "Dell Vostro 3360",
187 .matches = {
188 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
189 DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 3360"),
190 },
191 .driver_data = &quirk_dell_vostro_v130,
192 },
193 {
194 .callback = dmi_matched,
195 .ident = "Dell Vostro 3460",
196 .matches = {
197 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
198 DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 3460"),
199 },
200 .driver_data = &quirk_dell_vostro_v130,
201 },
202 {
203 .callback = dmi_matched,
204 .ident = "Dell Vostro 3560",
205 .matches = {
206 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
207 DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 3560"),
208 },
209 .driver_data = &quirk_dell_vostro_v130,
210 },
d0e0a477
AK		 211 {
212 .callback = dmi_matched,
213 .ident = "Dell Vostro 3450",
214 .matches = {
215 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
216 DMI_MATCH(DMI_PRODUCT_NAME, "Dell System Vostro 3450"),
217 },
218 .driver_data = &quirk_dell_vostro_v130,
219 },
5f1e88f4
AK		 220 {
221 .callback = dmi_matched,
222 .ident = "Dell Inspiron 5420",
223 .matches = {
224 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
a2174ba2 225 DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 5420"),
5f1e88f4
AK		 226 },
227 .driver_data = &quirk_dell_vostro_v130,
228 },
229 {
230 .callback = dmi_matched,
231 .ident = "Dell Inspiron 5520",
232 .matches = {
233 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
a2174ba2 234 DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 5520"),
5f1e88f4
AK		 235 },
236 .driver_data = &quirk_dell_vostro_v130,
237 },
238 {
239 .callback = dmi_matched,
240 .ident = "Dell Inspiron 5720",
241 .matches = {
242 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
a2174ba2 243 DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 5720"),
5f1e88f4
AK		 244 },
245 .driver_data = &quirk_dell_vostro_v130,
246 },
247 {
248 .callback = dmi_matched,
249 .ident = "Dell Inspiron 7420",
250 .matches = {
251 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
a2174ba2 252 DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 7420"),
5f1e88f4
AK		 253 },
254 .driver_data = &quirk_dell_vostro_v130,
255 },
256 {
257 .callback = dmi_matched,
258 .ident = "Dell Inspiron 7520",
259 .matches = {
260 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
a2174ba2 261 DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 7520"),
5f1e88f4
AK		 262 },
263 .driver_data = &quirk_dell_vostro_v130,
264 },
265 {
266 .callback = dmi_matched,
267 .ident = "Dell Inspiron 7720",
268 .matches = {
269 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
a2174ba2 270 DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 7720"),
5f1e88f4
AK		 271 },
272 .driver_data = &quirk_dell_vostro_v130,
273 },
6cff8d60
GM		 274 {
275 .callback = dmi_matched,
276 .ident = "Dell XPS13 9333",
277 .matches = {
278 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
279 DMI_MATCH(DMI_PRODUCT_NAME, "XPS13 9333"),
280 },
281 .driver_data = &quirk_dell_xps13_9333,
282 },
d62d421b 283 { }
2d8b90be
AK		 284};
285
f992efbb
PR		 286/*
287 * Derived from information in smbios-wireless-ctl:
288 *
289 * cbSelect 17, Value 11
290 *
291 * Return Wireless Info
292 * cbArg1, byte0 = 0x00
293 *
294 * cbRes1 Standard return codes (0, -1, -2)
295 * cbRes2 Info bit flags:
296 *
297 * 0 Hardware switch supported (1)
298 * 1 WiFi locator supported (1)
299 * 2 WLAN supported (1)
300 * 3 Bluetooth (BT) supported (1)
301 * 4 WWAN supported (1)
302 * 5 Wireless KBD supported (1)
303 * 6 Uw b supported (1)
304 * 7 WiGig supported (1)
305 * 8 WLAN installed (1)
306 * 9 BT installed (1)
307 * 10 WWAN installed (1)
308 * 11 Uw b installed (1)
309 * 12 WiGig installed (1)
310 * 13-15 Reserved (0)
311 * 16 Hardware (HW) switch is On (1)
312 * 17 WLAN disabled (1)
313 * 18 BT disabled (1)
314 * 19 WWAN disabled (1)
315 * 20 Uw b disabled (1)
316 * 21 WiGig disabled (1)
317 * 20-31 Reserved (0)
318 *
319 * cbRes3 NVRAM size in bytes
320 * cbRes4, byte 0 NVRAM format version number
321 *
322 *
323 * Set QuickSet Radio Disable Flag
324 * cbArg1, byte0 = 0x01
325 * cbArg1, byte1
326 * Radio ID value:
327 * 0 Radio Status
328 * 1 WLAN ID
329 * 2 BT ID
330 * 3 WWAN ID
331 * 4 UWB ID
332 * 5 WIGIG ID
333 * cbArg1, byte2 Flag bits:
334 * 0 QuickSet disables radio (1)
335 * 1-7 Reserved (0)
336 *
337 * cbRes1 Standard return codes (0, -1, -2)
338 * cbRes2 QuickSet (QS) radio disable bit map:
339 * 0 QS disables WLAN
340 * 1 QS disables BT
341 * 2 QS disables WWAN
342 * 3 QS disables UWB
343 * 4 QS disables WIGIG
344 * 5-31 Reserved (0)
345 *
346 * Wireless Switch Configuration
347 * cbArg1, byte0 = 0x02
348 *
349 * cbArg1, byte1
350 * Subcommand:
351 * 0 Get config
352 * 1 Set config
353 * 2 Set WiFi locator enable/disable
354 * cbArg1,byte2
355 * Switch settings (if byte 1==1):
356 * 0 WLAN sw itch control (1)
357 * 1 BT sw itch control (1)
358 * 2 WWAN sw itch control (1)
359 * 3 UWB sw itch control (1)
360 * 4 WiGig sw itch control (1)
361 * 5-7 Reserved (0)
362 * cbArg1, byte2 Enable bits (if byte 1==2):
363 * 0 Enable WiFi locator (1)
364 *
365 * cbRes1 Standard return codes (0, -1, -2)
366 * cbRes2 QuickSet radio disable bit map:
367 * 0 WLAN controlled by sw itch (1)
368 * 1 BT controlled by sw itch (1)
369 * 2 WWAN controlled by sw itch (1)
370 * 3 UWB controlled by sw itch (1)
371 * 4 WiGig controlled by sw itch (1)
372 * 5-6 Reserved (0)
373 * 7 Wireless sw itch config locked (1)
374 * 8 WiFi locator enabled (1)
375 * 9-14 Reserved (0)
376 * 15 WiFi locator setting locked (1)
377 * 16-31 Reserved (0)
378 *
379 * Read Local Config Data (LCD)
380 * cbArg1, byte0 = 0x10
381 * cbArg1, byte1 NVRAM index low byte
382 * cbArg1, byte2 NVRAM index high byte
383 * cbRes1 Standard return codes (0, -1, -2)
384 * cbRes2 4 bytes read from LCD[index]
385 * cbRes3 4 bytes read from LCD[index+4]
386 * cbRes4 4 bytes read from LCD[index+8]
387 *
388 * Write Local Config Data (LCD)
389 * cbArg1, byte0 = 0x11
390 * cbArg1, byte1 NVRAM index low byte
391 * cbArg1, byte2 NVRAM index high byte
392 * cbArg2 4 bytes to w rite at LCD[index]
393 * cbArg3 4 bytes to w rite at LCD[index+4]
394 * cbArg4 4 bytes to w rite at LCD[index+8]
395 * cbRes1 Standard return codes (0, -1, -2)
396 *
397 * Populate Local Config Data from NVRAM
398 * cbArg1, byte0 = 0x12
399 * cbRes1 Standard return codes (0, -1, -2)
400 *
401 * Commit Local Config Data to NVRAM
402 * cbArg1, byte0 = 0x13
403 * cbRes1 Standard return codes (0, -1, -2)
404 */
4cc8a574
HG		 405
406static int dell_rfkill_set(void *data, bool blocked)
407{
bc2104c2 408 struct calling_interface_buffer *buffer;
4cc8a574
HG		 409 int disable = blocked ? 1 : 0;
410 unsigned long radio = (unsigned long)data;
411 int hwswitch_bit = (unsigned long)data - 1;
22565ba0
PR		 412 int hwswitch;
413 int status;
715d0cdd 414 int ret;
4cc8a574 415
bc2104c2 416 buffer = dell_smbios_get_buffer();
715d0cdd 417
17070f24 418 dell_smbios_send_request(17, 11);
715d0cdd 419 ret = buffer->output[0];
22565ba0 420 status = buffer->output[1];
715d0cdd
PR		 421
422 if (ret != 0)
423 goto out;
4cc8a574 424
b6aa7e18 425 dell_smbios_clear_buffer();
22565ba0
PR		 426
427 buffer->input[0] = 0x2;
17070f24 428 dell_smbios_send_request(17, 11);
22565ba0
PR		 429 ret = buffer->output[0];
430 hwswitch = buffer->output[1];
431
4cc8a574 432 /* If the hardware switch controls this radio, and the hardware
ed112898 433 switch is disabled, always disable the radio */
22565ba0
PR		 434 if (ret == 0 && (hwswitch & BIT(hwswitch_bit)) &&
435 (status & BIT(0)) && !(status & BIT(16)))
ed112898 436 disable = 1;
4cc8a574 437
b6aa7e18 438 dell_smbios_clear_buffer();
ced53f6d 439
4cc8a574 440 buffer->input[0] = (1 | (radio<<8) | (disable << 16));
17070f24 441 dell_smbios_send_request(17, 11);
715d0cdd 442 ret = buffer->output[0];
4cc8a574 443
715d0cdd 444 out:
cb161763 445 dell_smbios_release_buffer();
0db2180f 446 return dell_smbios_error(ret);
4cc8a574
HG		 447}
448
04c9a3a0 449/* Must be called with the buffer held */
33f9359a 450static void dell_rfkill_update_sw_state(struct rfkill *rfkill, int radio,
bc2104c2
MK		 451 int status,
452 struct calling_interface_buffer *buffer)
d038880e 453{
04c9a3a0
HG		 454 if (status & BIT(0)) {
455 /* Has hw-switch, sync sw_state to BIOS */
456 int block = rfkill_blocked(rfkill);
b6aa7e18 457 dell_smbios_clear_buffer();
04c9a3a0 458 buffer->input[0] = (1 | (radio << 8) | (block << 16));
17070f24 459 dell_smbios_send_request(17, 11);
04c9a3a0 460 } else {
3f56588a
HG		 461 /* No hw-switch, sync BIOS state to sw_state */
462 rfkill_set_sw_state(rfkill, !!(status & BIT(radio + 16)));
463 }
33f9359a 464}
d038880e 465
33f9359a 466static void dell_rfkill_update_hw_state(struct rfkill *rfkill, int radio,
22565ba0 467 int status, int hwswitch)
33f9359a 468{
22565ba0 469 if (hwswitch & (BIT(radio - 1)))
d038880e
HG		 470 rfkill_set_hw_state(rfkill, !(status & BIT(16)));
471}
472
4cc8a574
HG		 473static void dell_rfkill_query(struct rfkill *rfkill, void *data)
474{
bc2104c2 475 struct calling_interface_buffer *buffer;
22565ba0
PR		 476 int radio = ((unsigned long)data & 0xF);
477 int hwswitch;
4cc8a574 478 int status;
715d0cdd 479 int ret;
4cc8a574 480
bc2104c2 481 buffer = dell_smbios_get_buffer();
22565ba0 482
17070f24 483 dell_smbios_send_request(17, 11);
715d0cdd 484 ret = buffer->output[0];
4cc8a574 485 status = buffer->output[1];
22565ba0
PR		 486
487 if (ret != 0 || !(status & BIT(0))) {
cb161763 488 dell_smbios_release_buffer();
22565ba0
PR		 489 return;
490 }
491
b6aa7e18 492 dell_smbios_clear_buffer();
22565ba0
PR		 493
494 buffer->input[0] = 0x2;
17070f24 495 dell_smbios_send_request(17, 11);
22565ba0
PR		 496 ret = buffer->output[0];
497 hwswitch = buffer->output[1];
498
cb161763 499 dell_smbios_release_buffer();
4cc8a574 500
715d0cdd
PR		 501 if (ret != 0)
502 return;
04c9a3a0 503
22565ba0 504 dell_rfkill_update_hw_state(rfkill, radio, status, hwswitch);
4cc8a574
HG		 505}
506
507static const struct rfkill_ops dell_rfkill_ops = {
508 .set_block = dell_rfkill_set,
509 .query = dell_rfkill_query,
510};
511
037accfa
KYL		 512static struct dentry *dell_laptop_dir;
513
514static int dell_debugfs_show(struct seq_file *s, void *data)
515{
bc2104c2 516 struct calling_interface_buffer *buffer;
22565ba0
PR		 517 int hwswitch_state;
518 int hwswitch_ret;
037accfa 519 int status;
715d0cdd 520 int ret;
037accfa 521
bc2104c2 522 buffer = dell_smbios_get_buffer();
22565ba0 523
17070f24 524 dell_smbios_send_request(17, 11);
715d0cdd 525 ret = buffer->output[0];
037accfa 526 status = buffer->output[1];
22565ba0 527
b6aa7e18 528 dell_smbios_clear_buffer();
22565ba0
PR		 529
530 buffer->input[0] = 0x2;
17070f24 531 dell_smbios_send_request(17, 11);
22565ba0
PR		 532 hwswitch_ret = buffer->output[0];
533 hwswitch_state = buffer->output[1];
534
cb161763 535 dell_smbios_release_buffer();
037accfa 536
715d0cdd 537 seq_printf(s, "return:\t%d\n", ret);
037accfa
KYL		 538 seq_printf(s, "status:\t0x%X\n", status);
539 seq_printf(s, "Bit 0 : Hardware switch supported: %lu\n",
540 status & BIT(0));
541 seq_printf(s, "Bit 1 : Wifi locator supported: %lu\n",
542 (status & BIT(1)) >> 1);
543 seq_printf(s, "Bit 2 : Wifi is supported: %lu\n",
544 (status & BIT(2)) >> 2);
545 seq_printf(s, "Bit 3 : Bluetooth is supported: %lu\n",
546 (status & BIT(3)) >> 3);
547 seq_printf(s, "Bit 4 : WWAN is supported: %lu\n",
548 (status & BIT(4)) >> 4);
549 seq_printf(s, "Bit 5 : Wireless keyboard supported: %lu\n",
550 (status & BIT(5)) >> 5);
2e19f93f
PR		 551 seq_printf(s, "Bit 6 : UWB supported: %lu\n",
552 (status & BIT(6)) >> 6);
553 seq_printf(s, "Bit 7 : WiGig supported: %lu\n",
554 (status & BIT(7)) >> 7);
037accfa
KYL		 555 seq_printf(s, "Bit 8 : Wifi is installed: %lu\n",
556 (status & BIT(8)) >> 8);
557 seq_printf(s, "Bit 9 : Bluetooth is installed: %lu\n",
558 (status & BIT(9)) >> 9);
559 seq_printf(s, "Bit 10: WWAN is installed: %lu\n",
560 (status & BIT(10)) >> 10);
2e19f93f
PR		 561 seq_printf(s, "Bit 11: UWB installed: %lu\n",
562 (status & BIT(11)) >> 11);
563 seq_printf(s, "Bit 12: WiGig installed: %lu\n",
564 (status & BIT(12)) >> 12);
565
037accfa
KYL		 566 seq_printf(s, "Bit 16: Hardware switch is on: %lu\n",
567 (status & BIT(16)) >> 16);
568 seq_printf(s, "Bit 17: Wifi is blocked: %lu\n",
569 (status & BIT(17)) >> 17);
570 seq_printf(s, "Bit 18: Bluetooth is blocked: %lu\n",
571 (status & BIT(18)) >> 18);
572 seq_printf(s, "Bit 19: WWAN is blocked: %lu\n",
573 (status & BIT(19)) >> 19);
2e19f93f
PR		 574 seq_printf(s, "Bit 20: UWB is blocked: %lu\n",
575 (status & BIT(20)) >> 20);
576 seq_printf(s, "Bit 21: WiGig is blocked: %lu\n",
577 (status & BIT(21)) >> 21);
037accfa 578
22565ba0
PR		 579 seq_printf(s, "\nhwswitch_return:\t%d\n", hwswitch_ret);
580 seq_printf(s, "hwswitch_state:\t0x%X\n", hwswitch_state);
037accfa
KYL		 581 seq_printf(s, "Bit 0 : Wifi controlled by switch: %lu\n",
582 hwswitch_state & BIT(0));
583 seq_printf(s, "Bit 1 : Bluetooth controlled by switch: %lu\n",
584 (hwswitch_state & BIT(1)) >> 1);
585 seq_printf(s, "Bit 2 : WWAN controlled by switch: %lu\n",
586 (hwswitch_state & BIT(2)) >> 2);
2e19f93f
PR		 587 seq_printf(s, "Bit 3 : UWB controlled by switch: %lu\n",
588 (hwswitch_state & BIT(3)) >> 3);
589 seq_printf(s, "Bit 4 : WiGig controlled by switch: %lu\n",
590 (hwswitch_state & BIT(4)) >> 4);
037accfa
KYL		 591 seq_printf(s, "Bit 7 : Wireless switch config locked: %lu\n",
592 (hwswitch_state & BIT(7)) >> 7);
593 seq_printf(s, "Bit 8 : Wifi locator enabled: %lu\n",
594 (hwswitch_state & BIT(8)) >> 8);
595 seq_printf(s, "Bit 15: Wifi locator setting locked: %lu\n",
596 (hwswitch_state & BIT(15)) >> 15);
597
598 return 0;
599}
600
601static int dell_debugfs_open(struct inode *inode, struct file *file)
602{
603 return single_open(file, dell_debugfs_show, inode->i_private);
604}
605
606static const struct file_operations dell_debugfs_fops = {
607 .owner = THIS_MODULE,
608 .open = dell_debugfs_open,
609 .read = seq_read,
610 .llseek = seq_lseek,
611 .release = single_release,
612};
613
4cc8a574
HG		 614static void dell_update_rfkill(struct work_struct *ignored)
615{
bc2104c2 616 struct calling_interface_buffer *buffer;
22565ba0 617 int hwswitch = 0;
d038880e 618 int status;
715d0cdd 619 int ret;
d038880e 620
bc2104c2 621 buffer = dell_smbios_get_buffer();
715d0cdd 622
17070f24 623 dell_smbios_send_request(17, 11);
715d0cdd 624 ret = buffer->output[0];
d038880e 625 status = buffer->output[1];
d038880e 626
715d0cdd
PR		 627 if (ret != 0)
628 goto out;
629
b6aa7e18 630 dell_smbios_clear_buffer();
22565ba0
PR		 631
632 buffer->input[0] = 0x2;
17070f24 633 dell_smbios_send_request(17, 11);
22565ba0
PR		 634 ret = buffer->output[0];
635
636 if (ret == 0 && (status & BIT(0)))
637 hwswitch = buffer->output[1];
638
33f9359a 639 if (wifi_rfkill) {
22565ba0 640 dell_rfkill_update_hw_state(wifi_rfkill, 1, status, hwswitch);
bc2104c2 641 dell_rfkill_update_sw_state(wifi_rfkill, 1, status, buffer);
33f9359a
HG		 642 }
643 if (bluetooth_rfkill) {
22565ba0
PR		 644 dell_rfkill_update_hw_state(bluetooth_rfkill, 2, status,
645 hwswitch);
bc2104c2
MK		 646 dell_rfkill_update_sw_state(bluetooth_rfkill, 2, status,
647 buffer);
33f9359a
HG		 648 }
649 if (wwan_rfkill) {
22565ba0 650 dell_rfkill_update_hw_state(wwan_rfkill, 3, status, hwswitch);
bc2104c2 651 dell_rfkill_update_sw_state(wwan_rfkill, 3, status, buffer);
33f9359a 652 }
04c9a3a0 653
715d0cdd 654 out:
cb161763 655 dell_smbios_release_buffer();
4cc8a574
HG		 656}
657static DECLARE_DELAYED_WORK(dell_rfkill_work, dell_update_rfkill);
658
97f440c2
HG		 659static bool dell_laptop_i8042_filter(unsigned char data, unsigned char str,
660 struct serio *port)
661{
662 static bool extended;
663
98280374 664 if (str & I8042_STR_AUXDATA)
97f440c2
HG		 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}
4cc8a574 682
f8358578
PR		 683static int (*dell_rbtn_notifier_register_func)(struct notifier_block *);
684static int (*dell_rbtn_notifier_unregister_func)(struct notifier_block *);
685
686static 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
693static struct notifier_block dell_laptop_rbtn_notifier = {
694 .notifier_call = dell_laptop_rbtn_notifier_call,
695};
696
4cc8a574
HG		 697static int __init dell_setup_rfkill(void)
698{
bc2104c2 699 struct calling_interface_buffer *buffer;
ba5194f1 700 int status, ret, whitelisted;
2a925518
HG		 701 const char *product;
702
703 /*
ba5194f1
HG		 704 * rfkill support causes trouble on various models, mostly Inspirons.
705 * So we whitelist certain series, and don't support rfkill on others.
2a925518 706 */
ba5194f1 707 whitelisted = 0;
2a925518 708 product = dmi_get_system_info(DMI_PRODUCT_NAME);
ba5194f1
HG		 709 if (product && (strncmp(product, "Latitude", 8) == 0 ||
710 strncmp(product, "Precision", 9) == 0))
711 whitelisted = 1;
712 if (!force_rfkill && !whitelisted)
4cc8a574 713 return 0;
4cc8a574 714
bc2104c2 715 buffer = dell_smbios_get_buffer();
17070f24 716 dell_smbios_send_request(17, 11);
715d0cdd 717 ret = buffer->output[0];
4cc8a574 718 status = buffer->output[1];
cb161763 719 dell_smbios_release_buffer();
4cc8a574 720
715d0cdd
PR		 721 /* dell wireless info smbios call is not supported */
722 if (ret != 0)
723 return 0;
724
22565ba0
PR		 725 /* rfkill is only tested on laptops with a hwswitch */
726 if (!(status & BIT(0)) && !force_rfkill)
727 return 0;
2bd4ac13 728
4cc8a574
HG		 729 if ((status & (1<<2|1<<8)) == (1<<2|1<<8)) {
730 wifi_rfkill = rfkill_alloc("dell-wifi", &platform_device->dev,
731 RFKILL_TYPE_WLAN,
732 &dell_rfkill_ops, (void *) 1);
733 if (!wifi_rfkill) {
734 ret = -ENOMEM;
735 goto err_wifi;
736 }
737 ret = rfkill_register(wifi_rfkill);
738 if (ret)
739 goto err_wifi;
740 }
741
742 if ((status & (1<<3|1<<9)) == (1<<3|1<<9)) {
743 bluetooth_rfkill = rfkill_alloc("dell-bluetooth",
744 &platform_device->dev,
745 RFKILL_TYPE_BLUETOOTH,
746 &dell_rfkill_ops, (void *) 2);
747 if (!bluetooth_rfkill) {
748 ret = -ENOMEM;
749 goto err_bluetooth;
750 }
751 ret = rfkill_register(bluetooth_rfkill);
752 if (ret)
753 goto err_bluetooth;
754 }
755
756 if ((status & (1<<4|1<<10)) == (1<<4|1<<10)) {
757 wwan_rfkill = rfkill_alloc("dell-wwan",
758 &platform_device->dev,
759 RFKILL_TYPE_WWAN,
760 &dell_rfkill_ops, (void *) 3);
761 if (!wwan_rfkill) {
762 ret = -ENOMEM;
763 goto err_wwan;
764 }
765 ret = rfkill_register(wwan_rfkill);
766 if (ret)
767 goto err_wwan;
768 }
769
f8358578
PR		 770 /*
771 * Dell Airplane Mode Switch driver (dell-rbtn) supports ACPI devices
772 * which can receive events from HW slider switch.
773 *
774 * Dell SMBIOS on whitelisted models supports controlling radio devices
775 * but does not support receiving HW button switch events. We can use
776 * i8042 filter hook function to receive keyboard data and handle
777 * keycode for HW button.
778 *
779 * So if it is possible we will use Dell Airplane Mode Switch ACPI
780 * driver for receiving HW events and Dell SMBIOS for setting rfkill
781 * states. If ACPI driver or device is not available we will fallback to
782 * i8042 filter hook function.
783 *
784 * To prevent duplicate rfkill devices which control and do same thing,
785 * dell-rbtn driver will automatically remove its own rfkill devices
786 * once function dell_rbtn_notifier_register() is called.
787 */
788
789 dell_rbtn_notifier_register_func =
790 symbol_request(dell_rbtn_notifier_register);
791 if (dell_rbtn_notifier_register_func) {
792 dell_rbtn_notifier_unregister_func =
793 symbol_request(dell_rbtn_notifier_unregister);
794 if (!dell_rbtn_notifier_unregister_func) {
795 symbol_put(dell_rbtn_notifier_register);
796 dell_rbtn_notifier_register_func = NULL;
797 }
798 }
799
800 if (dell_rbtn_notifier_register_func) {
801 ret = dell_rbtn_notifier_register_func(
802 &dell_laptop_rbtn_notifier);
803 symbol_put(dell_rbtn_notifier_register);
804 dell_rbtn_notifier_register_func = NULL;
805 if (ret != 0) {
806 symbol_put(dell_rbtn_notifier_unregister);
807 dell_rbtn_notifier_unregister_func = NULL;
808 }
809 } else {
810 pr_info("Symbols from dell-rbtn acpi driver are not available\n");
811 ret = -ENODEV;
812 }
813
814 if (ret == 0) {
815 pr_info("Using dell-rbtn acpi driver for receiving events\n");
816 } else if (ret != -ENODEV) {
817 pr_warn("Unable to register dell rbtn notifier\n");
97f440c2 818 goto err_filter;
f8358578
PR		 819 } else {
820 ret = i8042_install_filter(dell_laptop_i8042_filter);
821 if (ret) {
822 pr_warn("Unable to install key filter\n");
823 goto err_filter;
824 }
825 pr_info("Using i8042 filter function for receiving events\n");
97f440c2
HG		 826 }
827
4cc8a574 828 return 0;
97f440c2
HG		 829err_filter:
830 if (wwan_rfkill)
831 rfkill_unregister(wwan_rfkill);
4cc8a574
HG		 832err_wwan:
833 rfkill_destroy(wwan_rfkill);
834 if (bluetooth_rfkill)
835 rfkill_unregister(bluetooth_rfkill);
836err_bluetooth:
837 rfkill_destroy(bluetooth_rfkill);
838 if (wifi_rfkill)
839 rfkill_unregister(wifi_rfkill);
840err_wifi:
841 rfkill_destroy(wifi_rfkill);
842
843 return ret;
844}
845
846static void dell_cleanup_rfkill(void)
847{
f8358578
PR		 848 if (dell_rbtn_notifier_unregister_func) {
849 dell_rbtn_notifier_unregister_func(&dell_laptop_rbtn_notifier);
850 symbol_put(dell_rbtn_notifier_unregister);
851 dell_rbtn_notifier_unregister_func = NULL;
852 } else {
853 i8042_remove_filter(dell_laptop_i8042_filter);
854 }
855 cancel_delayed_work_sync(&dell_rfkill_work);
4cc8a574
HG		 856 if (wifi_rfkill) {
857 rfkill_unregister(wifi_rfkill);
858 rfkill_destroy(wifi_rfkill);
859 }
860 if (bluetooth_rfkill) {
861 rfkill_unregister(bluetooth_rfkill);
862 rfkill_destroy(bluetooth_rfkill);
863 }
864 if (wwan_rfkill) {
865 rfkill_unregister(wwan_rfkill);
866 rfkill_destroy(wwan_rfkill);
867 }
868}
869
ad8f07cc
MG		 870static int dell_send_intensity(struct backlight_device *bd)
871{
bc2104c2 872 struct calling_interface_buffer *buffer;
f951d6e6 873 struct calling_interface_token *token;
715d0cdd
PR		 874 int ret;
875
f951d6e6
MK		 876 token = dell_smbios_find_token(BRIGHTNESS_TOKEN);
877 if (!token)
715d0cdd 878 return -ENODEV;
ad8f07cc 879
bc2104c2 880 buffer = dell_smbios_get_buffer();
f951d6e6 881 buffer->input[0] = token->location;
116ee77b 882 buffer->input[1] = bd->props.brightness;
ad8f07cc 883
ad8f07cc 884 if (power_supply_is_system_supplied() > 0)
17070f24 885 dell_smbios_send_request(1, 2);
ad8f07cc 886 else
17070f24 887 dell_smbios_send_request(1, 1);
ad8f07cc 888
0db2180f 889 ret = dell_smbios_error(buffer->output[0]);
715d0cdd 890
cb161763 891 dell_smbios_release_buffer();
7da8fb27 892 return ret;
ad8f07cc
MG		 893}
894
895static int dell_get_intensity(struct backlight_device *bd)
896{
bc2104c2 897 struct calling_interface_buffer *buffer;
f951d6e6 898 struct calling_interface_token *token;
715d0cdd 899 int ret;
ad8f07cc 900
f951d6e6
MK		 901 token = dell_smbios_find_token(BRIGHTNESS_TOKEN);
902 if (!token)
715d0cdd 903 return -ENODEV;
ad8f07cc 904
bc2104c2 905 buffer = dell_smbios_get_buffer();
f951d6e6 906 buffer->input[0] = token->location;
ad8f07cc
MG		 907
908 if (power_supply_is_system_supplied() > 0)
17070f24 909 dell_smbios_send_request(0, 2);
ad8f07cc 910 else
17070f24 911 dell_smbios_send_request(0, 1);
ad8f07cc 912
715d0cdd 913 if (buffer->output[0])
0db2180f 914 ret = dell_smbios_error(buffer->output[0]);
715d0cdd
PR		 915 else
916 ret = buffer->output[1];
b486742a 917
cb161763 918 dell_smbios_release_buffer();
b486742a 919 return ret;
ad8f07cc
MG		 920}
921
acc2472e 922static const struct backlight_ops dell_ops = {
ad8f07cc
MG		 923 .get_brightness = dell_get_intensity,
924 .update_status = dell_send_intensity,
925};
926
869f8dfa 927static void touchpad_led_on(void)
2d8b90be
AK		 928{
929 int command = 0x97;
930 char data = 1;
931 i8042_command(&data, command | 1 << 12);
932}
933
869f8dfa 934static void touchpad_led_off(void)
2d8b90be
AK		 935{
936 int command = 0x97;
937 char data = 2;
938 i8042_command(&data, command | 1 << 12);
939}
940
941static void touchpad_led_set(struct led_classdev *led_cdev,
942 enum led_brightness value)
943{
944 if (value > 0)
945 touchpad_led_on();
946 else
947 touchpad_led_off();
948}
949
950static struct led_classdev touchpad_led = {
951 .name = "dell-laptop::touchpad",
952 .brightness_set = touchpad_led_set,
2d5de9e8 953 .flags = LED_CORE_SUSPENDRESUME,
2d8b90be
AK		 954};
955
681480cc 956static int __init touchpad_led_init(struct device *dev)
2d8b90be
AK		 957{
958 return led_classdev_register(dev, &touchpad_led);
959}
960
961static void touchpad_led_exit(void)
962{
963 led_classdev_unregister(&touchpad_led);
964}
965
6cff8d60
GM		 966/*
967 * Derived from information in smbios-keyboard-ctl:
968 *
969 * cbClass 4
970 * cbSelect 11
971 * Keyboard illumination
972 * cbArg1 determines the function to be performed
973 *
974 * cbArg1 0x0 = Get Feature Information
975 * cbRES1 Standard return codes (0, -1, -2)
976 * cbRES2, word0 Bitmap of user-selectable modes
977 * bit 0 Always off (All systems)
978 * bit 1 Always on (Travis ATG, Siberia)
979 * bit 2 Auto: ALS-based On; ALS-based Off (Travis ATG)
980 * bit 3 Auto: ALS- and input-activity-based On; input-activity based Off
981 * bit 4 Auto: Input-activity-based On; input-activity based Off
982 * bit 5 Auto: Input-activity-based On (illumination level 25%); input-activity based Off
983 * bit 6 Auto: Input-activity-based On (illumination level 50%); input-activity based Off
984 * bit 7 Auto: Input-activity-based On (illumination level 75%); input-activity based Off
985 * bit 8 Auto: Input-activity-based On (illumination level 100%); input-activity based Off
986 * bits 9-15 Reserved for future use
987 * cbRES2, byte2 Reserved for future use
988 * cbRES2, byte3 Keyboard illumination type
989 * 0 Reserved
990 * 1 Tasklight
991 * 2 Backlight
992 * 3-255 Reserved for future use
993 * cbRES3, byte0 Supported auto keyboard illumination trigger bitmap.
994 * bit 0 Any keystroke
995 * bit 1 Touchpad activity
996 * bit 2 Pointing stick
997 * bit 3 Any mouse
998 * bits 4-7 Reserved for future use
999 * cbRES3, byte1 Supported timeout unit bitmap
1000 * bit 0 Seconds
1001 * bit 1 Minutes
1002 * bit 2 Hours
1003 * bit 3 Days
1004 * bits 4-7 Reserved for future use
1005 * cbRES3, byte2 Number of keyboard light brightness levels
1006 * cbRES4, byte0 Maximum acceptable seconds value (0 if seconds not supported).
1007 * cbRES4, byte1 Maximum acceptable minutes value (0 if minutes not supported).
1008 * cbRES4, byte2 Maximum acceptable hours value (0 if hours not supported).
1009 * cbRES4, byte3 Maximum acceptable days value (0 if days not supported)
1010 *
1011 * cbArg1 0x1 = Get Current State
1012 * cbRES1 Standard return codes (0, -1, -2)
1013 * cbRES2, word0 Bitmap of current mode state
1014 * bit 0 Always off (All systems)
1015 * bit 1 Always on (Travis ATG, Siberia)
1016 * bit 2 Auto: ALS-based On; ALS-based Off (Travis ATG)
1017 * bit 3 Auto: ALS- and input-activity-based On; input-activity based Off
1018 * bit 4 Auto: Input-activity-based On; input-activity based Off
1019 * bit 5 Auto: Input-activity-based On (illumination level 25%); input-activity based Off
1020 * bit 6 Auto: Input-activity-based On (illumination level 50%); input-activity based Off
1021 * bit 7 Auto: Input-activity-based On (illumination level 75%); input-activity based Off
1022 * bit 8 Auto: Input-activity-based On (illumination level 100%); input-activity based Off
1023 * bits 9-15 Reserved for future use
1024 * Note: Only One bit can be set
1025 * cbRES2, byte2 Currently active auto keyboard illumination triggers.
1026 * bit 0 Any keystroke
1027 * bit 1 Touchpad activity
1028 * bit 2 Pointing stick
1029 * bit 3 Any mouse
1030 * bits 4-7 Reserved for future use
9216e0dc 1031 * cbRES2, byte3 Current Timeout on battery
6cff8d60
GM		 1032 * bits 7:6 Timeout units indicator:
1033 * 00b Seconds
1034 * 01b Minutes
1035 * 10b Hours
1036 * 11b Days
1037 * bits 5:0 Timeout value (0-63) in sec/min/hr/day
1038 * NOTE: A value of 0 means always on (no timeout) if any bits of RES3 byte
1039 * are set upon return from the [Get feature information] call.
1040 * cbRES3, byte0 Current setting of ALS value that turns the light on or off.
1041 * cbRES3, byte1 Current ALS reading
1042 * cbRES3, byte2 Current keyboard light level.
9216e0dc
PR		 1043 * cbRES3, byte3 Current timeout on AC Power
1044 * bits 7:6 Timeout units indicator:
1045 * 00b Seconds
1046 * 01b Minutes
1047 * 10b Hours
1048 * 11b Days
1049 * Bits 5:0 Timeout value (0-63) in sec/min/hr/day
1050 * NOTE: A value of 0 means always on (no timeout) if any bits of RES3 byte2
1051 * are set upon return from the upon return from the [Get Feature information] call.
6cff8d60
GM		 1052 *
1053 * cbArg1 0x2 = Set New State
1054 * cbRES1 Standard return codes (0, -1, -2)
1055 * cbArg2, word0 Bitmap of current mode state
1056 * bit 0 Always off (All systems)
1057 * bit 1 Always on (Travis ATG, Siberia)
1058 * bit 2 Auto: ALS-based On; ALS-based Off (Travis ATG)
1059 * bit 3 Auto: ALS- and input-activity-based On; input-activity based Off
1060 * bit 4 Auto: Input-activity-based On; input-activity based Off
1061 * bit 5 Auto: Input-activity-based On (illumination level 25%); input-activity based Off
1062 * bit 6 Auto: Input-activity-based On (illumination level 50%); input-activity based Off
1063 * bit 7 Auto: Input-activity-based On (illumination level 75%); input-activity based Off
1064 * bit 8 Auto: Input-activity-based On (illumination level 100%); input-activity based Off
1065 * bits 9-15 Reserved for future use
1066 * Note: Only One bit can be set
1067 * cbArg2, byte2 Desired auto keyboard illumination triggers. Must remain inactive to allow
1068 * keyboard to turn off automatically.
1069 * bit 0 Any keystroke
1070 * bit 1 Touchpad activity
1071 * bit 2 Pointing stick
1072 * bit 3 Any mouse
1073 * bits 4-7 Reserved for future use
9216e0dc 1074 * cbArg2, byte3 Desired Timeout on battery
6cff8d60
GM		 1075 * bits 7:6 Timeout units indicator:
1076 * 00b Seconds
1077 * 01b Minutes
1078 * 10b Hours
1079 * 11b Days
1080 * bits 5:0 Timeout value (0-63) in sec/min/hr/day
1081 * cbArg3, byte0 Desired setting of ALS value that turns the light on or off.
1082 * cbArg3, byte2 Desired keyboard light level.
9216e0dc
PR		 1083 * cbArg3, byte3 Desired Timeout on AC power
1084 * bits 7:6 Timeout units indicator:
1085 * 00b Seconds
1086 * 01b Minutes
1087 * 10b Hours
1088 * 11b Days
1089 * bits 5:0 Timeout value (0-63) in sec/min/hr/day
6cff8d60
GM		 1090 */
1091
1092
1093enum kbd_timeout_unit {
1094 KBD_TIMEOUT_SECONDS = 0,
1095 KBD_TIMEOUT_MINUTES,
1096 KBD_TIMEOUT_HOURS,
1097 KBD_TIMEOUT_DAYS,
1098};
1099
1100enum kbd_mode_bit {
1101 KBD_MODE_BIT_OFF = 0,
1102 KBD_MODE_BIT_ON,
1103 KBD_MODE_BIT_ALS,
1104 KBD_MODE_BIT_TRIGGER_ALS,
1105 KBD_MODE_BIT_TRIGGER,
1106 KBD_MODE_BIT_TRIGGER_25,
1107 KBD_MODE_BIT_TRIGGER_50,
1108 KBD_MODE_BIT_TRIGGER_75,
1109 KBD_MODE_BIT_TRIGGER_100,
1110};
1111
1112#define kbd_is_als_mode_bit(bit) \
1113 ((bit) == KBD_MODE_BIT_ALS || (bit) == KBD_MODE_BIT_TRIGGER_ALS)
1114#define kbd_is_trigger_mode_bit(bit) \
1115 ((bit) >= KBD_MODE_BIT_TRIGGER_ALS && (bit) <= KBD_MODE_BIT_TRIGGER_100)
1116#define kbd_is_level_mode_bit(bit) \
1117 ((bit) >= KBD_MODE_BIT_TRIGGER_25 && (bit) <= KBD_MODE_BIT_TRIGGER_100)
1118
1119struct kbd_info {
1120 u16 modes;
1121 u8 type;
1122 u8 triggers;
1123 u8 levels;
1124 u8 seconds;
1125 u8 minutes;
1126 u8 hours;
1127 u8 days;
1128};
1129
1130struct kbd_state {
1131 u8 mode_bit;
1132 u8 triggers;
1133 u8 timeout_value;
1134 u8 timeout_unit;
9216e0dc
PR		 1135 u8 timeout_value_ac;
1136 u8 timeout_unit_ac;
6cff8d60
GM		 1137 u8 als_setting;
1138 u8 als_value;
1139 u8 level;
1140};
1141
1142static const int kbd_tokens[] = {
1143 KBD_LED_OFF_TOKEN,
1144 KBD_LED_AUTO_25_TOKEN,
1145 KBD_LED_AUTO_50_TOKEN,
1146 KBD_LED_AUTO_75_TOKEN,
1147 KBD_LED_AUTO_100_TOKEN,
1148 KBD_LED_ON_TOKEN,
1149};
1150
1151static u16 kbd_token_bits;
1152
1153static struct kbd_info kbd_info;
1154static bool kbd_als_supported;
1155static bool kbd_triggers_supported;
9216e0dc 1156static bool kbd_timeout_ac_supported;
6cff8d60
GM		 1157
1158static u8 kbd_mode_levels[16];
1159static int kbd_mode_levels_count;
1160
1161static u8 kbd_previous_level;
1162static u8 kbd_previous_mode_bit;
1163
1164static bool kbd_led_present;
e5bf5df7 1165static DEFINE_MUTEX(kbd_led_mutex);
6cff8d60
GM		 1166
1167/*
1168 * NOTE: there are three ways to set the keyboard backlight level.
1169 * First, via kbd_state.mode_bit (assigning KBD_MODE_BIT_TRIGGER_* value).
1170 * Second, via kbd_state.level (assigning numerical value <= kbd_info.levels).
1171 * Third, via SMBIOS tokens (KBD_LED_* in kbd_tokens)
1172 *
1173 * There are laptops which support only one of these methods. If we want to
1174 * support as many machines as possible we need to implement all three methods.
1175 * The first two methods use the kbd_state structure. The third uses SMBIOS
1176 * tokens. If kbd_info.levels == 0, the machine does not support setting the
1177 * keyboard backlight level via kbd_state.level.
1178 */
1179
1180static int kbd_get_info(struct kbd_info *info)
1181{
bc2104c2 1182 struct calling_interface_buffer *buffer;
6cff8d60
GM		 1183 u8 units;
1184 int ret;
1185
bc2104c2 1186 buffer = dell_smbios_get_buffer();
6cff8d60
GM		 1187
1188 buffer->input[0] = 0x0;
17070f24 1189 dell_smbios_send_request(4, 11);
6cff8d60
GM		 1190 ret = buffer->output[0];
1191
1192 if (ret) {
0db2180f 1193 ret = dell_smbios_error(ret);
6cff8d60
GM		 1194 goto out;
1195 }
1196
1197 info->modes = buffer->output[1] & 0xFFFF;
1198 info->type = (buffer->output[1] >> 24) & 0xFF;
1199 info->triggers = buffer->output[2] & 0xFF;
1200 units = (buffer->output[2] >> 8) & 0xFF;
1201 info->levels = (buffer->output[2] >> 16) & 0xFF;
1202
1203 if (units & BIT(0))
1204 info->seconds = (buffer->output[3] >> 0) & 0xFF;
1205 if (units & BIT(1))
1206 info->minutes = (buffer->output[3] >> 8) & 0xFF;
1207 if (units & BIT(2))
1208 info->hours = (buffer->output[3] >> 16) & 0xFF;
1209 if (units & BIT(3))
1210 info->days = (buffer->output[3] >> 24) & 0xFF;
1211
1212 out:
cb161763 1213 dell_smbios_release_buffer();
6cff8d60
GM		 1214 return ret;
1215}
1216
1217static unsigned int kbd_get_max_level(void)
1218{
1219 if (kbd_info.levels != 0)
1220 return kbd_info.levels;
1221 if (kbd_mode_levels_count > 0)
1222 return kbd_mode_levels_count - 1;
1223 return 0;
1224}
1225
1226static int kbd_get_level(struct kbd_state *state)
1227{
1228 int i;
1229
1230 if (kbd_info.levels != 0)
1231 return state->level;
1232
1233 if (kbd_mode_levels_count > 0) {
1234 for (i = 0; i < kbd_mode_levels_count; ++i)
1235 if (kbd_mode_levels[i] == state->mode_bit)
1236 return i;
1237 return 0;
1238 }
1239
1240 return -EINVAL;
1241}
1242
1243static int kbd_set_level(struct kbd_state *state, u8 level)
1244{
1245 if (kbd_info.levels != 0) {
1246 if (level != 0)
1247 kbd_previous_level = level;
1248 if (state->level == level)
1249 return 0;
1250 state->level = level;
1251 if (level != 0 && state->mode_bit == KBD_MODE_BIT_OFF)
1252 state->mode_bit = kbd_previous_mode_bit;
1253 else if (level == 0 && state->mode_bit != KBD_MODE_BIT_OFF) {
1254 kbd_previous_mode_bit = state->mode_bit;
1255 state->mode_bit = KBD_MODE_BIT_OFF;
1256 }
1257 return 0;
1258 }
1259
1260 if (kbd_mode_levels_count > 0 && level < kbd_mode_levels_count) {
1261 if (level != 0)
1262 kbd_previous_level = level;
1263 state->mode_bit = kbd_mode_levels[level];
1264 return 0;
1265 }
1266
1267 return -EINVAL;
1268}
1269
1270static int kbd_get_state(struct kbd_state *state)
1271{
bc2104c2 1272 struct calling_interface_buffer *buffer;
6cff8d60
GM		 1273 int ret;
1274
bc2104c2 1275 buffer = dell_smbios_get_buffer();
6cff8d60
GM		 1276
1277 buffer->input[0] = 0x1;
17070f24 1278 dell_smbios_send_request(4, 11);
6cff8d60
GM		 1279 ret = buffer->output[0];
1280
1281 if (ret) {
0db2180f 1282 ret = dell_smbios_error(ret);
6cff8d60
GM		 1283 goto out;
1284 }
1285
1286 state->mode_bit = ffs(buffer->output[1] & 0xFFFF);
1287 if (state->mode_bit != 0)
1288 state->mode_bit--;
1289
1290 state->triggers = (buffer->output[1] >> 16) & 0xFF;
1291 state->timeout_value = (buffer->output[1] >> 24) & 0x3F;
1292 state->timeout_unit = (buffer->output[1] >> 30) & 0x3;
1293 state->als_setting = buffer->output[2] & 0xFF;
1294 state->als_value = (buffer->output[2] >> 8) & 0xFF;
1295 state->level = (buffer->output[2] >> 16) & 0xFF;
9216e0dc
PR		 1296 state->timeout_value_ac = (buffer->output[2] >> 24) & 0x3F;
1297 state->timeout_unit_ac = (buffer->output[2] >> 30) & 0x3;
6cff8d60
GM		 1298
1299 out:
cb161763 1300 dell_smbios_release_buffer();
6cff8d60
GM		 1301 return ret;
1302}
1303
1304static int kbd_set_state(struct kbd_state *state)
1305{
bc2104c2 1306 struct calling_interface_buffer *buffer;
6cff8d60
GM		 1307 int ret;
1308
bc2104c2 1309 buffer = dell_smbios_get_buffer();
6cff8d60
GM		 1310 buffer->input[0] = 0x2;
1311 buffer->input[1] = BIT(state->mode_bit) & 0xFFFF;
1312 buffer->input[1] |= (state->triggers & 0xFF) << 16;
1313 buffer->input[1] |= (state->timeout_value & 0x3F) << 24;
1314 buffer->input[1] |= (state->timeout_unit & 0x3) << 30;
1315 buffer->input[2] = state->als_setting & 0xFF;
1316 buffer->input[2] |= (state->level & 0xFF) << 16;
9216e0dc
PR		 1317 buffer->input[2] |= (state->timeout_value_ac & 0x3F) << 24;
1318 buffer->input[2] |= (state->timeout_unit_ac & 0x3) << 30;
17070f24 1319 dell_smbios_send_request(4, 11);
6cff8d60 1320 ret = buffer->output[0];
cb161763 1321 dell_smbios_release_buffer();
6cff8d60 1322
0db2180f 1323 return dell_smbios_error(ret);
6cff8d60
GM		 1324}
1325
1326static int kbd_set_state_safe(struct kbd_state *state, struct kbd_state *old)
1327{
1328 int ret;
1329
1330 ret = kbd_set_state(state);
1331 if (ret == 0)
1332 return 0;
1333
1334 /*
1335 * When setting the new state fails,try to restore the previous one.
1336 * This is needed on some machines where BIOS sets a default state when
1337 * setting a new state fails. This default state could be all off.
1338 */
1339
1340 if (kbd_set_state(old))
1341 pr_err("Setting old previous keyboard state failed\n");
1342
1343 return ret;
1344}
1345
1346static int kbd_set_token_bit(u8 bit)
1347{
bc2104c2 1348 struct calling_interface_buffer *buffer;
63c4029b 1349 struct calling_interface_token *token;
6cff8d60
GM		 1350 int ret;
1351
1352 if (bit >= ARRAY_SIZE(kbd_tokens))
1353 return -EINVAL;
1354
63c4029b
MK		 1355 token = dell_smbios_find_token(kbd_tokens[bit]);
1356 if (!token)
6cff8d60
GM		 1357 return -EINVAL;
1358
bc2104c2 1359 buffer = dell_smbios_get_buffer();
63c4029b
MK		 1360 buffer->input[0] = token->location;
1361 buffer->input[1] = token->value;
17070f24 1362 dell_smbios_send_request(1, 0);
6cff8d60 1363 ret = buffer->output[0];
cb161763 1364 dell_smbios_release_buffer();
6cff8d60 1365
0db2180f 1366 return dell_smbios_error(ret);
6cff8d60
GM		 1367}
1368
1369static int kbd_get_token_bit(u8 bit)
1370{
bc2104c2 1371 struct calling_interface_buffer *buffer;
63c4029b 1372 struct calling_interface_token *token;
6cff8d60
GM		 1373 int ret;
1374 int val;
1375
1376 if (bit >= ARRAY_SIZE(kbd_tokens))
1377 return -EINVAL;
1378
63c4029b
MK		 1379 token = dell_smbios_find_token(kbd_tokens[bit]);
1380 if (!token)
6cff8d60
GM		 1381 return -EINVAL;
1382
bc2104c2 1383 buffer = dell_smbios_get_buffer();
63c4029b 1384 buffer->input[0] = token->location;
17070f24 1385 dell_smbios_send_request(0, 0);
6cff8d60
GM		 1386 ret = buffer->output[0];
1387 val = buffer->output[1];
cb161763 1388 dell_smbios_release_buffer();
6cff8d60
GM		 1389
1390 if (ret)
0db2180f 1391 return dell_smbios_error(ret);
6cff8d60 1392
63c4029b 1393 return (val == token->value);
6cff8d60
GM		 1394}
1395
1396static int kbd_get_first_active_token_bit(void)
1397{
1398 int i;
1399 int ret;
1400
1401 for (i = 0; i < ARRAY_SIZE(kbd_tokens); ++i) {
1402 ret = kbd_get_token_bit(i);
1403 if (ret == 1)
1404 return i;
1405 }
1406
1407 return ret;
1408}
1409
1410static int kbd_get_valid_token_counts(void)
1411{
1412 return hweight16(kbd_token_bits);
1413}
1414
1415static inline int kbd_init_info(void)
1416{
1417 struct kbd_state state;
1418 int ret;
1419 int i;
1420
1421 ret = kbd_get_info(&kbd_info);
1422 if (ret)
1423 return ret;
1424
9216e0dc
PR		 1425 /* NOTE: Old models without KBD_LED_AC_TOKEN token supports only one
1426 * timeout value which is shared for both battery and AC power
1427 * settings. So do not try to set AC values on old models.
1428 */
1429 if (dell_smbios_find_token(KBD_LED_AC_TOKEN))
1430 kbd_timeout_ac_supported = true;
1431
6cff8d60
GM		 1432 kbd_get_state(&state);
1433
1434 /* NOTE: timeout value is stored in 6 bits so max value is 63 */
1435 if (kbd_info.seconds > 63)
1436 kbd_info.seconds = 63;
1437 if (kbd_info.minutes > 63)
1438 kbd_info.minutes = 63;
1439 if (kbd_info.hours > 63)
1440 kbd_info.hours = 63;
1441 if (kbd_info.days > 63)
1442 kbd_info.days = 63;
1443
1444 /* NOTE: On tested machines ON mode did not work and caused
1445 * problems (turned backlight off) so do not use it
1446 */
1447 kbd_info.modes &= ~BIT(KBD_MODE_BIT_ON);
1448
1449 kbd_previous_level = kbd_get_level(&state);
1450 kbd_previous_mode_bit = state.mode_bit;
1451
1452 if (kbd_previous_level == 0 && kbd_get_max_level() != 0)
1453 kbd_previous_level = 1;
1454
1455 if (kbd_previous_mode_bit == KBD_MODE_BIT_OFF) {
1456 kbd_previous_mode_bit =
1457 ffs(kbd_info.modes & ~BIT(KBD_MODE_BIT_OFF));
1458 if (kbd_previous_mode_bit != 0)
1459 kbd_previous_mode_bit--;
1460 }
1461
1462 if (kbd_info.modes & (BIT(KBD_MODE_BIT_ALS) |
1463 BIT(KBD_MODE_BIT_TRIGGER_ALS)))
1464 kbd_als_supported = true;
1465
1466 if (kbd_info.modes & (
1467 BIT(KBD_MODE_BIT_TRIGGER_ALS) | BIT(KBD_MODE_BIT_TRIGGER) |
1468 BIT(KBD_MODE_BIT_TRIGGER_25) | BIT(KBD_MODE_BIT_TRIGGER_50) |
1469 BIT(KBD_MODE_BIT_TRIGGER_75) | BIT(KBD_MODE_BIT_TRIGGER_100)
1470 ))
1471 kbd_triggers_supported = true;
1472
1473 /* kbd_mode_levels[0] is reserved, see below */
1474 for (i = 0; i < 16; ++i)
1475 if (kbd_is_level_mode_bit(i) && (BIT(i) & kbd_info.modes))
1476 kbd_mode_levels[1 + kbd_mode_levels_count++] = i;
1477
1478 /*
1479 * Find the first supported mode and assign to kbd_mode_levels[0].
1480 * This should be 0 (off), but we cannot depend on the BIOS to
1481 * support 0.
1482 */
1483 if (kbd_mode_levels_count > 0) {
1484 for (i = 0; i < 16; ++i) {
1485 if (BIT(i) & kbd_info.modes) {
1486 kbd_mode_levels[0] = i;
1487 break;
1488 }
1489 }
1490 kbd_mode_levels_count++;
1491 }
1492
1493 return 0;
1494
1495}
1496
1497static inline void kbd_init_tokens(void)
1498{
1499 int i;
1500
1501 for (i = 0; i < ARRAY_SIZE(kbd_tokens); ++i)
63c4029b 1502 if (dell_smbios_find_token(kbd_tokens[i]))
6cff8d60
GM		 1503 kbd_token_bits |= BIT(i);
1504}
1505
1506static void kbd_init(void)
1507{
1508 int ret;
1509
1510 ret = kbd_init_info();
1511 kbd_init_tokens();
1512
1b1ffc57
KHF		 1513 /*
1514 * Only supports keyboard backlight when it has at least two modes.
1515 */
1516 if ((ret == 0 && (kbd_info.levels != 0 || kbd_mode_levels_count >= 2))
1517 || kbd_get_valid_token_counts() >= 2)
6cff8d60
GM		 1518 kbd_led_present = true;
1519}
1520
1521static ssize_t kbd_led_timeout_store(struct device *dev,
1522 struct device_attribute *attr,
1523 const char *buf, size_t count)
1524{
1525 struct kbd_state new_state;
1526 struct kbd_state state;
1527 bool convert;
1528 int value;
1529 int ret;
1530 char ch;
1531 u8 unit;
1532 int i;
1533
1534 ret = sscanf(buf, "%d %c", &value, &ch);
1535 if (ret < 1)
1536 return -EINVAL;
1537 else if (ret == 1)
1538 ch = 's';
1539
1540 if (value < 0)
1541 return -EINVAL;
1542
1543 convert = false;
1544
1545 switch (ch) {
1546 case 's':
1547 if (value > kbd_info.seconds)
1548 convert = true;
1549 unit = KBD_TIMEOUT_SECONDS;
1550 break;
1551 case 'm':
1552 if (value > kbd_info.minutes)
1553 convert = true;
1554 unit = KBD_TIMEOUT_MINUTES;
1555 break;
1556 case 'h':
1557 if (value > kbd_info.hours)
1558 convert = true;
1559 unit = KBD_TIMEOUT_HOURS;
1560 break;
1561 case 'd':
1562 if (value > kbd_info.days)
1563 convert = true;
1564 unit = KBD_TIMEOUT_DAYS;
1565 break;
1566 default:
1567 return -EINVAL;
1568 }
1569
1570 if (quirks && quirks->needs_kbd_timeouts)
1571 convert = true;
1572
1573 if (convert) {
1574 /* Convert value from current units to seconds */
1575 switch (unit) {
1576 case KBD_TIMEOUT_DAYS:
1577 value *= 24;
1578 case KBD_TIMEOUT_HOURS:
1579 value *= 60;
1580 case KBD_TIMEOUT_MINUTES:
1581 value *= 60;
1582 unit = KBD_TIMEOUT_SECONDS;
1583 }
1584
1585 if (quirks && quirks->needs_kbd_timeouts) {
1586 for (i = 0; quirks->kbd_timeouts[i] != -1; i++) {
1587 if (value <= quirks->kbd_timeouts[i]) {
1588 value = quirks->kbd_timeouts[i];
1589 break;
1590 }
1591 }
1592 }
1593
1594 if (value <= kbd_info.seconds && kbd_info.seconds) {
1595 unit = KBD_TIMEOUT_SECONDS;
1596 } else if (value / 60 <= kbd_info.minutes && kbd_info.minutes) {
1597 value /= 60;
1598 unit = KBD_TIMEOUT_MINUTES;
1599 } else if (value / (60 * 60) <= kbd_info.hours && kbd_info.hours) {
1600 value /= (60 * 60);
1601 unit = KBD_TIMEOUT_HOURS;
1602 } else if (value / (60 * 60 * 24) <= kbd_info.days && kbd_info.days) {
1603 value /= (60 * 60 * 24);
1604 unit = KBD_TIMEOUT_DAYS;
1605 } else {
1606 return -EINVAL;
1607 }
1608 }
1609
e5bf5df7
HG		 1610 mutex_lock(&kbd_led_mutex);
1611
6cff8d60
GM		 1612 ret = kbd_get_state(&state);
1613 if (ret)
e5bf5df7 1614 goto out;
6cff8d60
GM		 1615
1616 new_state = state;
9216e0dc
PR		 1617
1618 if (kbd_timeout_ac_supported && power_supply_is_system_supplied() > 0) {
1619 new_state.timeout_value_ac = value;
1620 new_state.timeout_unit_ac = unit;
1621 } else {
1622 new_state.timeout_value = value;
1623 new_state.timeout_unit = unit;
1624 }
6cff8d60
GM		 1625
1626 ret = kbd_set_state_safe(&new_state, &state);
1627 if (ret)
e5bf5df7 1628 goto out;
6cff8d60 1629
e5bf5df7
HG		 1630 ret = count;
1631out:
1632 mutex_unlock(&kbd_led_mutex);
1633 return ret;
6cff8d60
GM		 1634}
1635
1636static ssize_t kbd_led_timeout_show(struct device *dev,
1637 struct device_attribute *attr, char *buf)
1638{
1639 struct kbd_state state;
9216e0dc 1640 int value;
6cff8d60
GM		 1641 int ret;
1642 int len;
9216e0dc 1643 u8 unit;
6cff8d60
GM		 1644
1645 ret = kbd_get_state(&state);
1646 if (ret)
1647 return ret;
1648
9216e0dc
PR		 1649 if (kbd_timeout_ac_supported && power_supply_is_system_supplied() > 0) {
1650 value = state.timeout_value_ac;
1651 unit = state.timeout_unit_ac;
1652 } else {
1653 value = state.timeout_value;
1654 unit = state.timeout_unit;
1655 }
1656
1657 len = sprintf(buf, "%d", value);
6cff8d60 1658
9216e0dc 1659 switch (unit) {
6cff8d60
GM		 1660 case KBD_TIMEOUT_SECONDS:
1661 return len + sprintf(buf+len, "s\n");
1662 case KBD_TIMEOUT_MINUTES:
1663 return len + sprintf(buf+len, "m\n");
1664 case KBD_TIMEOUT_HOURS:
1665 return len + sprintf(buf+len, "h\n");
1666 case KBD_TIMEOUT_DAYS:
1667 return len + sprintf(buf+len, "d\n");
1668 default:
1669 return -EINVAL;
1670 }
1671
1672 return len;
1673}
1674
1675static DEVICE_ATTR(stop_timeout, S_IRUGO | S_IWUSR,
1676 kbd_led_timeout_show, kbd_led_timeout_store);
1677
1678static const char * const kbd_led_triggers[] = {
1679 "keyboard",
1680 "touchpad",
1681 /*"trackstick"*/ NULL, /* NOTE: trackstick is just alias for touchpad */
1682 "mouse",
1683};
1684
1685static ssize_t kbd_led_triggers_store(struct device *dev,
1686 struct device_attribute *attr,
1687 const char *buf, size_t count)
1688{
1689 struct kbd_state new_state;
1690 struct kbd_state state;
1691 bool triggers_enabled = false;
1692 int trigger_bit = -1;
1693 char trigger[21];
1694 int i, ret;
1695
1696 ret = sscanf(buf, "%20s", trigger);
1697 if (ret != 1)
1698 return -EINVAL;
1699
1700 if (trigger[0] != '+' && trigger[0] != '-')
1701 return -EINVAL;
1702
e5bf5df7
HG		 1703 mutex_lock(&kbd_led_mutex);
1704
6cff8d60
GM		 1705 ret = kbd_get_state(&state);
1706 if (ret)
e5bf5df7 1707 goto out;
6cff8d60
GM		 1708
1709 if (kbd_triggers_supported)
1710 triggers_enabled = kbd_is_trigger_mode_bit(state.mode_bit);
1711
1712 if (kbd_triggers_supported) {
1713 for (i = 0; i < ARRAY_SIZE(kbd_led_triggers); ++i) {
1714 if (!(kbd_info.triggers & BIT(i)))
1715 continue;
1716 if (!kbd_led_triggers[i])
1717 continue;
1718 if (strcmp(trigger+1, kbd_led_triggers[i]) != 0)
1719 continue;
1720 if (trigger[0] == '+' &&
e5bf5df7
HG		 1721 triggers_enabled && (state.triggers & BIT(i))) {
1722 ret = count;
1723 goto out;
1724 }
6cff8d60 1725 if (trigger[0] == '-' &&
e5bf5df7
HG		 1726 (!triggers_enabled || !(state.triggers & BIT(i)))) {
1727 ret = count;
1728 goto out;
1729 }
6cff8d60
GM		 1730 trigger_bit = i;
1731 break;
1732 }
1733 }
1734
e5bf5df7
HG		 1735 if (trigger_bit == -1) {
1736 ret = -EINVAL;
1737 goto out;
1738 }
6cff8d60 1739
1c7e2824
HG		 1740 new_state = state;
1741 if (trigger[0] == '+')
1742 new_state.triggers |= BIT(trigger_bit);
1743 else {
1744 new_state.triggers &= ~BIT(trigger_bit);
1745 /*
1746 * NOTE: trackstick bit (2) must be disabled when
1747 * disabling touchpad bit (1), otherwise touchpad
1748 * bit (1) will not be disabled
1749 */
1750 if (trigger_bit == 1)
1751 new_state.triggers &= ~BIT(2);
1752 }
1753 if ((kbd_info.triggers & new_state.triggers) !=
e5bf5df7
HG		 1754 new_state.triggers) {
1755 ret = -EINVAL;
1756 goto out;
1757 }
1c7e2824
HG		 1758 if (new_state.triggers && !triggers_enabled) {
1759 new_state.mode_bit = KBD_MODE_BIT_TRIGGER;
1760 kbd_set_level(&new_state, kbd_previous_level);
1761 } else if (new_state.triggers == 0) {
1762 kbd_set_level(&new_state, 0);
1763 }
e5bf5df7
HG		 1764 if (!(kbd_info.modes & BIT(new_state.mode_bit))) {
1765 ret = -EINVAL;
1766 goto out;
1767 }
1c7e2824
HG		 1768 ret = kbd_set_state_safe(&new_state, &state);
1769 if (ret)
e5bf5df7 1770 goto out;
1c7e2824
HG		 1771 if (new_state.mode_bit != KBD_MODE_BIT_OFF)
1772 kbd_previous_mode_bit = new_state.mode_bit;
e5bf5df7
HG		 1773 ret = count;
1774out:
1775 mutex_unlock(&kbd_led_mutex);
1776 return ret;
6cff8d60
GM		 1777}
1778
1779static ssize_t kbd_led_triggers_show(struct device *dev,
1780 struct device_attribute *attr, char *buf)
1781{
1782 struct kbd_state state;
1783 bool triggers_enabled;
1784 int level, i, ret;
1785 int len = 0;
1786
1787 ret = kbd_get_state(&state);
1788 if (ret)
1789 return ret;
1790
1791 len = 0;
1792
1793 if (kbd_triggers_supported) {
1794 triggers_enabled = kbd_is_trigger_mode_bit(state.mode_bit);
1795 level = kbd_get_level(&state);
1796 for (i = 0; i < ARRAY_SIZE(kbd_led_triggers); ++i) {
1797 if (!(kbd_info.triggers & BIT(i)))
1798 continue;
1799 if (!kbd_led_triggers[i])
1800 continue;
1801 if ((triggers_enabled || level <= 0) &&
1802 (state.triggers & BIT(i)))
1803 buf[len++] = '+';
1804 else
1805 buf[len++] = '-';
1806 len += sprintf(buf+len, "%s ", kbd_led_triggers[i]);
1807 }
1808 }
1809
1810 if (len)
1811 buf[len - 1] = '\n';
1812
1813 return len;
1814}
1815
1816static DEVICE_ATTR(start_triggers, S_IRUGO | S_IWUSR,
1817 kbd_led_triggers_show, kbd_led_triggers_store);
1818
1819static ssize_t kbd_led_als_enabled_store(struct device *dev,
1820 struct device_attribute *attr,
1821 const char *buf, size_t count)
1822{
1823 struct kbd_state new_state;
1824 struct kbd_state state;
1825 bool triggers_enabled = false;
1826 int enable;
1827 int ret;
1828
1829 ret = kstrtoint(buf, 0, &enable);
1830 if (ret)
1831 return ret;
1832
e5bf5df7
HG		 1833 mutex_lock(&kbd_led_mutex);
1834
6cff8d60
GM		 1835 ret = kbd_get_state(&state);
1836 if (ret)
e5bf5df7 1837 goto out;
6cff8d60 1838
e5bf5df7
HG		 1839 if (enable == kbd_is_als_mode_bit(state.mode_bit)) {
1840 ret = count;
1841 goto out;
1842 }
6cff8d60
GM		 1843
1844 new_state = state;
1845
1846 if (kbd_triggers_supported)
1847 triggers_enabled = kbd_is_trigger_mode_bit(state.mode_bit);
1848
1849 if (enable) {
1850 if (triggers_enabled)
1851 new_state.mode_bit = KBD_MODE_BIT_TRIGGER_ALS;
1852 else
1853 new_state.mode_bit = KBD_MODE_BIT_ALS;
1854 } else {
1855 if (triggers_enabled) {
1856 new_state.mode_bit = KBD_MODE_BIT_TRIGGER;
1857 kbd_set_level(&new_state, kbd_previous_level);
1858 } else {
1859 new_state.mode_bit = KBD_MODE_BIT_ON;
1860 }
1861 }
e5bf5df7
HG		 1862 if (!(kbd_info.modes & BIT(new_state.mode_bit))) {
1863 ret = -EINVAL;
1864 goto out;
1865 }
6cff8d60
GM		 1866
1867 ret = kbd_set_state_safe(&new_state, &state);
1868 if (ret)
e5bf5df7 1869 goto out;
6cff8d60
GM		 1870 kbd_previous_mode_bit = new_state.mode_bit;
1871
e5bf5df7
HG		 1872 ret = count;
1873out:
1874 mutex_unlock(&kbd_led_mutex);
1875 return ret;
6cff8d60
GM		 1876}
1877
1878static ssize_t kbd_led_als_enabled_show(struct device *dev,
1879 struct device_attribute *attr,
1880 char *buf)
1881{
1882 struct kbd_state state;
1883 bool enabled = false;
1884 int ret;
1885
1886 ret = kbd_get_state(&state);
1887 if (ret)
1888 return ret;
1889 enabled = kbd_is_als_mode_bit(state.mode_bit);
1890
1891 return sprintf(buf, "%d\n", enabled ? 1 : 0);
1892}
1893
1894static DEVICE_ATTR(als_enabled, S_IRUGO | S_IWUSR,
1895 kbd_led_als_enabled_show, kbd_led_als_enabled_store);
1896
1897static ssize_t kbd_led_als_setting_store(struct device *dev,
1898 struct device_attribute *attr,
1899 const char *buf, size_t count)
1900{
1901 struct kbd_state state;
1902 struct kbd_state new_state;
1903 u8 setting;
1904 int ret;
1905
1906 ret = kstrtou8(buf, 10, &setting);
1907 if (ret)
1908 return ret;
1909
e5bf5df7
HG		 1910 mutex_lock(&kbd_led_mutex);
1911
6cff8d60
GM		 1912 ret = kbd_get_state(&state);
1913 if (ret)
e5bf5df7 1914 goto out;
6cff8d60
GM		 1915
1916 new_state = state;
1917 new_state.als_setting = setting;
1918
1919 ret = kbd_set_state_safe(&new_state, &state);
1920 if (ret)
e5bf5df7 1921 goto out;
6cff8d60 1922
e5bf5df7
HG		 1923 ret = count;
1924out:
1925 mutex_unlock(&kbd_led_mutex);
1926 return ret;
6cff8d60
GM		 1927}
1928
1929static ssize_t kbd_led_als_setting_show(struct device *dev,
1930 struct device_attribute *attr,
1931 char *buf)
1932{
1933 struct kbd_state state;
1934 int ret;
1935
1936 ret = kbd_get_state(&state);
1937 if (ret)
1938 return ret;
1939
1940 return sprintf(buf, "%d\n", state.als_setting);
1941}
1942
1943static DEVICE_ATTR(als_setting, S_IRUGO | S_IWUSR,
1944 kbd_led_als_setting_show, kbd_led_als_setting_store);
1945
1946static struct attribute *kbd_led_attrs[] = {
1947 &dev_attr_stop_timeout.attr,
1948 &dev_attr_start_triggers.attr,
1949 NULL,
1950};
1951
1952static const struct attribute_group kbd_led_group = {
1953 .attrs = kbd_led_attrs,
1954};
1955
1956static struct attribute *kbd_led_als_attrs[] = {
1957 &dev_attr_als_enabled.attr,
1958 &dev_attr_als_setting.attr,
1959 NULL,
1960};
1961
1962static const struct attribute_group kbd_led_als_group = {
1963 .attrs = kbd_led_als_attrs,
1964};
1965
1966static const struct attribute_group *kbd_led_groups[] = {
1967 &kbd_led_group,
1968 &kbd_led_als_group,
1969 NULL,
1970};
1971
1972static enum led_brightness kbd_led_level_get(struct led_classdev *led_cdev)
1973{
1974 int ret;
1975 u16 num;
1976 struct kbd_state state;
1977
1978 if (kbd_get_max_level()) {
1979 ret = kbd_get_state(&state);
1980 if (ret)
1981 return 0;
1982 ret = kbd_get_level(&state);
1983 if (ret < 0)
1984 return 0;
1985 return ret;
1986 }
1987
1988 if (kbd_get_valid_token_counts()) {
1989 ret = kbd_get_first_active_token_bit();
1990 if (ret < 0)
1991 return 0;
1992 for (num = kbd_token_bits; num != 0 && ret > 0; --ret)
1993 num &= num - 1; /* clear the first bit set */
1994 if (num == 0)
1995 return 0;
1996 return ffs(num) - 1;
1997 }
1998
1999 pr_warn("Keyboard brightness level control not supported\n");
2000 return 0;
2001}
2002
1d161d4c
HG		 2003static int kbd_led_level_set(struct led_classdev *led_cdev,
2004 enum led_brightness value)
6cff8d60
GM		 2005{
2006 struct kbd_state state;
2007 struct kbd_state new_state;
2008 u16 num;
1d161d4c 2009 int ret;
6cff8d60 2010
e5bf5df7
HG		 2011 mutex_lock(&kbd_led_mutex);
2012
6cff8d60 2013 if (kbd_get_max_level()) {
1d161d4c
HG		 2014 ret = kbd_get_state(&state);
2015 if (ret)
e5bf5df7 2016 goto out;
6cff8d60 2017 new_state = state;
1d161d4c
HG		 2018 ret = kbd_set_level(&new_state, value);
2019 if (ret)
e5bf5df7
HG		 2020 goto out;
2021 ret = kbd_set_state_safe(&new_state, &state);
2022 } else if (kbd_get_valid_token_counts()) {
6cff8d60
GM		 2023 for (num = kbd_token_bits; num != 0 && value > 0; --value)
2024 num &= num - 1; /* clear the first bit set */
2025 if (num == 0)
e5bf5df7
HG		 2026 ret = 0;
2027 else
2028 ret = kbd_set_token_bit(ffs(num) - 1);
2029 } else {
2030 pr_warn("Keyboard brightness level control not supported\n");
2031 ret = -ENXIO;
6cff8d60
GM		 2032 }
2033
e5bf5df7
HG		 2034out:
2035 mutex_unlock(&kbd_led_mutex);
2036 return ret;
6cff8d60
GM		 2037}
2038
2039static struct led_classdev kbd_led = {
2040 .name = "dell::kbd_backlight",
9c656b07 2041 .flags = LED_BRIGHT_HW_CHANGED,
1d161d4c 2042 .brightness_set_blocking = kbd_led_level_set,
6cff8d60
GM		 2043 .brightness_get = kbd_led_level_get,
2044 .groups = kbd_led_groups,
2045};
2046
2047static int __init kbd_led_init(struct device *dev)
2048{
9c656b07
HG		 2049 int ret;
2050
6cff8d60
GM		 2051 kbd_init();
2052 if (!kbd_led_present)
2053 return -ENODEV;
2054 if (!kbd_als_supported)
2055 kbd_led_groups[1] = NULL;
2056 kbd_led.max_brightness = kbd_get_max_level();
2057 if (!kbd_led.max_brightness) {
2058 kbd_led.max_brightness = kbd_get_valid_token_counts();
2059 if (kbd_led.max_brightness)
2060 kbd_led.max_brightness--;
2061 }
9c656b07
HG		 2062 ret = led_classdev_register(dev, &kbd_led);
2063 if (ret)
2064 kbd_led_present = false;
2065
2066 return ret;
6cff8d60
GM		 2067}
2068
2069static void brightness_set_exit(struct led_classdev *led_cdev,
2070 enum led_brightness value)
2071{
2072 /* Don't change backlight level on exit */
2073};
2074
2075static void kbd_led_exit(void)
2076{
2077 if (!kbd_led_present)
2078 return;
2079 kbd_led.brightness_set = brightness_set_exit;
2080 led_classdev_unregister(&kbd_led);
2081}
2082
9c656b07
HG		 2083static int dell_laptop_notifier_call(struct notifier_block *nb,
2084 unsigned long action, void *data)
2085{
2086 switch (action) {
2087 case DELL_LAPTOP_KBD_BACKLIGHT_BRIGHTNESS_CHANGED:
2088 if (!kbd_led_present)
2089 break;
2090
2091 led_classdev_notify_brightness_hw_changed(&kbd_led,
2092 kbd_led_level_get(&kbd_led));
2093 break;
2094 }
2095
2096 return NOTIFY_OK;
2097}
2098
2099static struct notifier_block dell_laptop_notifier = {
2100 .notifier_call = dell_laptop_notifier_call,
2101};
2102
44319ab7
MK		 2103int dell_micmute_led_set(int state)
2104{
2105 struct calling_interface_buffer *buffer;
2106 struct calling_interface_token *token;
2107
2108 if (state == 0)
2109 token = dell_smbios_find_token(GLOBAL_MIC_MUTE_DISABLE);
2110 else if (state == 1)
2111 token = dell_smbios_find_token(GLOBAL_MIC_MUTE_ENABLE);
2112 else
2113 return -EINVAL;
2114
2115 if (!token)
2116 return -ENODEV;
2117
2118 buffer = dell_smbios_get_buffer();
2119 buffer->input[0] = token->location;
2120 buffer->input[1] = token->value;
2121 dell_smbios_send_request(1, 0);
2122 dell_smbios_release_buffer();
2123
2124 return state;
2125}
2126EXPORT_SYMBOL_GPL(dell_micmute_led_set);
2127
ad8f07cc
MG		 2128static int __init dell_init(void)
2129{
bc2104c2 2130 struct calling_interface_buffer *buffer;
f951d6e6 2131 struct calling_interface_token *token;
ad8f07cc
MG		 2132 int max_intensity = 0;
2133 int ret;
2134
2135 if (!dmi_check_system(dell_device_table))
2136 return -ENODEV;
2137
2d8b90be
AK		 2138 quirks = NULL;
2139 /* find if this machine support other functions */
2140 dmi_check_system(dell_quirks);
2141
ada3248a
AJ		 2142 ret = platform_driver_register(&platform_driver);
2143 if (ret)
2144 goto fail_platform_driver;
2145 platform_device = platform_device_alloc("dell-laptop", -1);
2146 if (!platform_device) {
2147 ret = -ENOMEM;
2148 goto fail_platform_device1;
2149 }
2150 ret = platform_device_add(platform_device);
2151 if (ret)
2152 goto fail_platform_device2;
2153
4cc8a574
HG		 2154 ret = dell_setup_rfkill();
2155
2156 if (ret) {
2157 pr_warn("Unable to setup rfkill\n");
2158 goto fail_rfkill;
2159 }
2160
2d8b90be
AK		 2161 if (quirks && quirks->touchpad_led)
2162 touchpad_led_init(&platform_device->dev);
2163
6cff8d60
GM		 2164 kbd_led_init(&platform_device->dev);
2165
037accfa 2166 dell_laptop_dir = debugfs_create_dir("dell_laptop", NULL);
4cc8a574
HG		 2167 if (dell_laptop_dir != NULL)
2168 debugfs_create_file("rfkill", 0444, dell_laptop_dir, NULL,
2169 &dell_debugfs_fops);
037accfa 2170
9c656b07
HG		 2171 dell_laptop_register_notifier(&dell_laptop_notifier);
2172
ee4cfe28 2173 if (acpi_video_get_backlight_type() != acpi_backlight_vendor)
ad8f07cc 2174 return 0;
ad8f07cc 2175
f951d6e6
MK		 2176 token = dell_smbios_find_token(BRIGHTNESS_TOKEN);
2177 if (token) {
bc2104c2 2178 buffer = dell_smbios_get_buffer();
f951d6e6 2179 buffer->input[0] = token->location;
17070f24 2180 dell_smbios_send_request(0, 2);
715d0cdd
PR		 2181 if (buffer->output[0] == 0)
2182 max_intensity = buffer->output[3];
cb161763 2183 dell_smbios_release_buffer();
ad8f07cc
MG		 2184 }
2185
2186 if (max_intensity) {
a19a6ee6
MG		 2187 struct backlight_properties props;
2188 memset(&props, 0, sizeof(struct backlight_properties));
bb7ca747 2189 props.type = BACKLIGHT_PLATFORM;
a19a6ee6
MG		 2190 props.max_brightness = max_intensity;
2191 dell_backlight_device = backlight_device_register("dell_backlight",
2192 &platform_device->dev,
2193 NULL,
2194 &dell_ops,
2195 &props);
ad8f07cc
MG		 2196
2197 if (IS_ERR(dell_backlight_device)) {
2198 ret = PTR_ERR(dell_backlight_device);
2199 dell_backlight_device = NULL;
71e9dc73 2200 goto fail_backlight;
ad8f07cc
MG		 2201 }
2202
ad8f07cc
MG		 2203 dell_backlight_device->props.brightness =
2204 dell_get_intensity(dell_backlight_device);
90a864b9
AY		 2205 if (dell_backlight_device->props.brightness < 0) {
2206 ret = dell_backlight_device->props.brightness;
2207 goto fail_get_brightness;
2208 }
ad8f07cc
MG		 2209 backlight_update_status(dell_backlight_device);
2210 }
2211
2212 return 0;
71e9dc73 2213
90a864b9
AY		 2214fail_get_brightness:
2215 backlight_device_unregister(dell_backlight_device);
71e9dc73 2216fail_backlight:
4cc8a574
HG		 2217 dell_cleanup_rfkill();
2218fail_rfkill:
ada3248a
AJ		 2219 platform_device_del(platform_device);
2220fail_platform_device2:
2221 platform_device_put(platform_device);
2222fail_platform_device1:
2223 platform_driver_unregister(&platform_driver);
2224fail_platform_driver:
ad8f07cc
MG		 2225 return ret;
2226}
2227
2228static void __exit dell_exit(void)
2229{
9c656b07 2230 dell_laptop_unregister_notifier(&dell_laptop_notifier);
037accfa 2231 debugfs_remove_recursive(dell_laptop_dir);
2d8b90be
AK		 2232 if (quirks && quirks->touchpad_led)
2233 touchpad_led_exit();
6cff8d60 2234 kbd_led_exit();
ad8f07cc 2235 backlight_device_unregister(dell_backlight_device);
4cc8a574 2236 dell_cleanup_rfkill();
facd61d7 2237 if (platform_device) {
92e00e47 2238 platform_device_unregister(platform_device);
facd61d7
MG		 2239 platform_driver_unregister(&platform_driver);
2240 }
ad8f07cc
MG		 2241}
2242
f8358578
PR		 2243/* dell-rbtn.c driver export functions which will not work correctly (and could
2244 * cause kernel crash) if they are called before dell-rbtn.c init code. This is
2245 * not problem when dell-rbtn.c is compiled as external module. When both files
2246 * (dell-rbtn.c and dell-laptop.c) are compiled statically into kernel, then we
2247 * need to ensure that dell_init() will be called after initializing dell-rbtn.
2248 * This can be achieved by late_initcall() instead module_init().
2249 */
2250late_initcall(dell_init);
ad8f07cc
MG		 2251module_exit(dell_exit);
2252
2253MODULE_AUTHOR("Matthew Garrett <mjg@redhat.com>");
6cff8d60
GM		 2254MODULE_AUTHOR("Gabriele Mazzotta <gabriele.mzt@gmail.com>");
2255MODULE_AUTHOR("Pali Rohár <pali.rohar@gmail.com>");
ad8f07cc
MG		 2256MODULE_DESCRIPTION("Dell laptop driver");
2257MODULE_LICENSE("GPL");
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