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