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Revert "ALSA: hda: Flush interrupts on disabling"
[linux/fpc-iii.git] / drivers / platform / x86 / dell-laptop.c
blob167d5042a6290b2cba50cea56428873865fd70bc
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/seq_file.h>
33 #include <acpi/video.h>
34 #include "dell-rbtn.h"
35 #include "dell-smbios.h"
36
37 #define BRIGHTNESS_TOKEN 0x7d
38 #define KBD_LED_OFF_TOKEN 0x01E1
39 #define KBD_LED_ON_TOKEN 0x01E2
40 #define KBD_LED_AUTO_TOKEN 0x01E3
41 #define KBD_LED_AUTO_25_TOKEN 0x02EA
42 #define KBD_LED_AUTO_50_TOKEN 0x02EB
43 #define KBD_LED_AUTO_75_TOKEN 0x02EC
44 #define KBD_LED_AUTO_100_TOKEN 0x02F6
45
46 struct quirk_entry {
47 u8 touchpad_led;
48 u8 kbd_led_levels_off_1;
49
50 int needs_kbd_timeouts;
51 /*
52 * Ordered list of timeouts expressed in seconds.
53 * The list must end with -1
54 */
55 int kbd_timeouts[];
56 };
57
58 static struct quirk_entry *quirks;
59
60 static struct quirk_entry quirk_dell_vostro_v130 = {
61 .touchpad_led = 1,
62 };
63
64 static int __init dmi_matched(const struct dmi_system_id *dmi)
65 {
66 quirks = dmi->driver_data;
67 return 1;
68 }
69
70 /*
71 * These values come from Windows utility provided by Dell. If any other value
72 * is used then BIOS silently set timeout to 0 without any error message.
73 */
74 static struct quirk_entry quirk_dell_xps13_9333 = {
75 .needs_kbd_timeouts = 1,
76 .kbd_timeouts = { 0, 5, 15, 60, 5 * 60, 15 * 60, -1 },
77 };
78
79 static struct quirk_entry quirk_dell_latitude_e6410 = {
80 .kbd_led_levels_off_1 = 1,
81 };
82
83 static struct platform_driver platform_driver = {
84 .driver = {
85 .name = "dell-laptop",
86 }
87 };
88
89 static struct platform_device *platform_device;
90 static struct backlight_device *dell_backlight_device;
91 static struct rfkill *wifi_rfkill;
92 static struct rfkill *bluetooth_rfkill;
93 static struct rfkill *wwan_rfkill;
94 static bool force_rfkill;
95
96 module_param(force_rfkill, bool, 0444);
97 MODULE_PARM_DESC(force_rfkill, "enable rfkill on non whitelisted models");
98
99 static const struct dmi_system_id dell_device_table[] __initconst = {
100 {
101 .ident = "Dell laptop",
102 .matches = {
103 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
104 DMI_MATCH(DMI_CHASSIS_TYPE, "8"),
105 },
106 },
107 {
108 .matches = {
109 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
110 DMI_MATCH(DMI_CHASSIS_TYPE, "9"), /*Laptop*/
111 },
112 },
113 {
114 .ident = "Dell Computer Corporation",
115 .matches = {
116 DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer Corporation"),
117 DMI_MATCH(DMI_CHASSIS_TYPE, "8"),
118 },
119 },
120 { }
121 };
122 MODULE_DEVICE_TABLE(dmi, dell_device_table);
123
124 static const struct dmi_system_id dell_quirks[] __initconst = {
125 {
126 .callback = dmi_matched,
127 .ident = "Dell Vostro V130",
128 .matches = {
129 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
130 DMI_MATCH(DMI_PRODUCT_NAME, "Vostro V130"),
131 },
132 .driver_data = &quirk_dell_vostro_v130,
133 },
134 {
135 .callback = dmi_matched,
136 .ident = "Dell Vostro V131",
137 .matches = {
138 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
139 DMI_MATCH(DMI_PRODUCT_NAME, "Vostro V131"),
140 },
141 .driver_data = &quirk_dell_vostro_v130,
142 },
143 {
144 .callback = dmi_matched,
145 .ident = "Dell Vostro 3350",
146 .matches = {
147 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
148 DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 3350"),
149 },
150 .driver_data = &quirk_dell_vostro_v130,
151 },
152 {
153 .callback = dmi_matched,
154 .ident = "Dell Vostro 3555",
155 .matches = {
156 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
157 DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 3555"),
158 },
159 .driver_data = &quirk_dell_vostro_v130,
160 },
161 {
162 .callback = dmi_matched,
163 .ident = "Dell Inspiron N311z",
164 .matches = {
165 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
166 DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron N311z"),
167 },
168 .driver_data = &quirk_dell_vostro_v130,
169 },
170 {
171 .callback = dmi_matched,
172 .ident = "Dell Inspiron M5110",
173 .matches = {
174 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
175 DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron M5110"),
176 },
177 .driver_data = &quirk_dell_vostro_v130,
178 },
179 {
180 .callback = dmi_matched,
181 .ident = "Dell Vostro 3360",
182 .matches = {
183 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
184 DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 3360"),
185 },
186 .driver_data = &quirk_dell_vostro_v130,
187 },
188 {
189 .callback = dmi_matched,
190 .ident = "Dell Vostro 3460",
191 .matches = {
192 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
193 DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 3460"),
194 },
195 .driver_data = &quirk_dell_vostro_v130,
196 },
197 {
198 .callback = dmi_matched,
199 .ident = "Dell Vostro 3560",
200 .matches = {
201 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
202 DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 3560"),
203 },
204 .driver_data = &quirk_dell_vostro_v130,
205 },
206 {
207 .callback = dmi_matched,
208 .ident = "Dell Vostro 3450",
209 .matches = {
210 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
211 DMI_MATCH(DMI_PRODUCT_NAME, "Dell System Vostro 3450"),
212 },
213 .driver_data = &quirk_dell_vostro_v130,
214 },
215 {
216 .callback = dmi_matched,
217 .ident = "Dell Inspiron 5420",
218 .matches = {
219 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
220 DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 5420"),
221 },
222 .driver_data = &quirk_dell_vostro_v130,
223 },
224 {
225 .callback = dmi_matched,
226 .ident = "Dell Inspiron 5520",
227 .matches = {
228 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
229 DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 5520"),
230 },
231 .driver_data = &quirk_dell_vostro_v130,
232 },
233 {
234 .callback = dmi_matched,
235 .ident = "Dell Inspiron 5720",
236 .matches = {
237 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
238 DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 5720"),
239 },
240 .driver_data = &quirk_dell_vostro_v130,
241 },
242 {
243 .callback = dmi_matched,
244 .ident = "Dell Inspiron 7420",
245 .matches = {
246 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
247 DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 7420"),
248 },
249 .driver_data = &quirk_dell_vostro_v130,
250 },
251 {
252 .callback = dmi_matched,
253 .ident = "Dell Inspiron 7520",
254 .matches = {
255 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
256 DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 7520"),
257 },
258 .driver_data = &quirk_dell_vostro_v130,
259 },
260 {
261 .callback = dmi_matched,
262 .ident = "Dell Inspiron 7720",
263 .matches = {
264 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
265 DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 7720"),
266 },
267 .driver_data = &quirk_dell_vostro_v130,
268 },
269 {
270 .callback = dmi_matched,
271 .ident = "Dell XPS13 9333",
272 .matches = {
273 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
274 DMI_MATCH(DMI_PRODUCT_NAME, "XPS13 9333"),
275 },
276 .driver_data = &quirk_dell_xps13_9333,
277 },
278 {
279 .callback = dmi_matched,
280 .ident = "Dell Latitude E6410",
281 .matches = {
282 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
283 DMI_MATCH(DMI_PRODUCT_NAME, "Latitude E6410"),
284 },
285 .driver_data = &quirk_dell_latitude_e6410,
286 },
287 { }
288 };
289
290 /*
291 * Derived from information in smbios-wireless-ctl:
292 *
293 * cbSelect 17, Value 11
294 *
295 * Return Wireless Info
296 * cbArg1, byte0 = 0x00
297 *
298 * cbRes1 Standard return codes (0, -1, -2)
299 * cbRes2 Info bit flags:
300 *
301 * 0 Hardware switch supported (1)
302 * 1 WiFi locator supported (1)
303 * 2 WLAN supported (1)
304 * 3 Bluetooth (BT) supported (1)
305 * 4 WWAN supported (1)
306 * 5 Wireless KBD supported (1)
307 * 6 Uw b supported (1)
308 * 7 WiGig supported (1)
309 * 8 WLAN installed (1)
310 * 9 BT installed (1)
311 * 10 WWAN installed (1)
312 * 11 Uw b installed (1)
313 * 12 WiGig installed (1)
314 * 13-15 Reserved (0)
315 * 16 Hardware (HW) switch is On (1)
316 * 17 WLAN disabled (1)
317 * 18 BT disabled (1)
318 * 19 WWAN disabled (1)
319 * 20 Uw b disabled (1)
320 * 21 WiGig disabled (1)
321 * 20-31 Reserved (0)
322 *
323 * cbRes3 NVRAM size in bytes
324 * cbRes4, byte 0 NVRAM format version number
325 *
326 *
327 * Set QuickSet Radio Disable Flag
328 * cbArg1, byte0 = 0x01
329 * cbArg1, byte1
330 * Radio ID value:
331 * 0 Radio Status
332 * 1 WLAN ID
333 * 2 BT ID
334 * 3 WWAN ID
335 * 4 UWB ID
336 * 5 WIGIG ID
337 * cbArg1, byte2 Flag bits:
338 * 0 QuickSet disables radio (1)
339 * 1-7 Reserved (0)
340 *
341 * cbRes1 Standard return codes (0, -1, -2)
342 * cbRes2 QuickSet (QS) radio disable bit map:
343 * 0 QS disables WLAN
344 * 1 QS disables BT
345 * 2 QS disables WWAN
346 * 3 QS disables UWB
347 * 4 QS disables WIGIG
348 * 5-31 Reserved (0)
349 *
350 * Wireless Switch Configuration
351 * cbArg1, byte0 = 0x02
352 *
353 * cbArg1, byte1
354 * Subcommand:
355 * 0 Get config
356 * 1 Set config
357 * 2 Set WiFi locator enable/disable
358 * cbArg1,byte2
359 * Switch settings (if byte 1==1):
360 * 0 WLAN sw itch control (1)
361 * 1 BT sw itch control (1)
362 * 2 WWAN sw itch control (1)
363 * 3 UWB sw itch control (1)
364 * 4 WiGig sw itch control (1)
365 * 5-7 Reserved (0)
366 * cbArg1, byte2 Enable bits (if byte 1==2):
367 * 0 Enable WiFi locator (1)
368 *
369 * cbRes1 Standard return codes (0, -1, -2)
370 * cbRes2 QuickSet radio disable bit map:
371 * 0 WLAN controlled by sw itch (1)
372 * 1 BT controlled by sw itch (1)
373 * 2 WWAN controlled by sw itch (1)
374 * 3 UWB controlled by sw itch (1)
375 * 4 WiGig controlled by sw itch (1)
376 * 5-6 Reserved (0)
377 * 7 Wireless sw itch config locked (1)
378 * 8 WiFi locator enabled (1)
379 * 9-14 Reserved (0)
380 * 15 WiFi locator setting locked (1)
381 * 16-31 Reserved (0)
382 *
383 * Read Local Config Data (LCD)
384 * cbArg1, byte0 = 0x10
385 * cbArg1, byte1 NVRAM index low byte
386 * cbArg1, byte2 NVRAM index high byte
387 * cbRes1 Standard return codes (0, -1, -2)
388 * cbRes2 4 bytes read from LCD[index]
389 * cbRes3 4 bytes read from LCD[index+4]
390 * cbRes4 4 bytes read from LCD[index+8]
391 *
392 * Write Local Config Data (LCD)
393 * cbArg1, byte0 = 0x11
394 * cbArg1, byte1 NVRAM index low byte
395 * cbArg1, byte2 NVRAM index high byte
396 * cbArg2 4 bytes to w rite at LCD[index]
397 * cbArg3 4 bytes to w rite at LCD[index+4]
398 * cbArg4 4 bytes to w rite at LCD[index+8]
399 * cbRes1 Standard return codes (0, -1, -2)
400 *
401 * Populate Local Config Data from NVRAM
402 * cbArg1, byte0 = 0x12
403 * cbRes1 Standard return codes (0, -1, -2)
404 *
405 * Commit Local Config Data to NVRAM
406 * cbArg1, byte0 = 0x13
407 * cbRes1 Standard return codes (0, -1, -2)
408 */
409
410 static int dell_rfkill_set(void *data, bool blocked)
411 {
412 struct calling_interface_buffer *buffer;
413 int disable = blocked ? 1 : 0;
414 unsigned long radio = (unsigned long)data;
415 int hwswitch_bit = (unsigned long)data - 1;
416 int hwswitch;
417 int status;
418 int ret;
419
420 buffer = dell_smbios_get_buffer();
421
422 dell_smbios_send_request(17, 11);
423 ret = buffer->output[0];
424 status = buffer->output[1];
425
426 if (ret != 0)
427 goto out;
428
429 dell_smbios_clear_buffer();
430
431 buffer->input[0] = 0x2;
432 dell_smbios_send_request(17, 11);
433 ret = buffer->output[0];
434 hwswitch = buffer->output[1];
435
436 /* If the hardware switch controls this radio, and the hardware
437 switch is disabled, always disable the radio */
438 if (ret == 0 && (hwswitch & BIT(hwswitch_bit)) &&
439 (status & BIT(0)) && !(status & BIT(16)))
440 disable = 1;
441
442 dell_smbios_clear_buffer();
443
444 buffer->input[0] = (1 | (radio<<8) | (disable << 16));
445 dell_smbios_send_request(17, 11);
446 ret = buffer->output[0];
447
448 out:
449 dell_smbios_release_buffer();
450 return dell_smbios_error(ret);
451 }
452
453 /* Must be called with the buffer held */
454 static void dell_rfkill_update_sw_state(struct rfkill *rfkill, int radio,
455 int status,
456 struct calling_interface_buffer *buffer)
457 {
458 if (status & BIT(0)) {
459 /* Has hw-switch, sync sw_state to BIOS */
460 int block = rfkill_blocked(rfkill);
461 dell_smbios_clear_buffer();
462 buffer->input[0] = (1 | (radio << 8) | (block << 16));
463 dell_smbios_send_request(17, 11);
464 } else {
465 /* No hw-switch, sync BIOS state to sw_state */
466 rfkill_set_sw_state(rfkill, !!(status & BIT(radio + 16)));
467 }
468 }
469
470 static void dell_rfkill_update_hw_state(struct rfkill *rfkill, int radio,
471 int status, int hwswitch)
472 {
473 if (hwswitch & (BIT(radio - 1)))
474 rfkill_set_hw_state(rfkill, !(status & BIT(16)));
475 }
476
477 static void dell_rfkill_query(struct rfkill *rfkill, void *data)
478 {
479 struct calling_interface_buffer *buffer;
480 int radio = ((unsigned long)data & 0xF);
481 int hwswitch;
482 int status;
483 int ret;
484
485 buffer = dell_smbios_get_buffer();
486
487 dell_smbios_send_request(17, 11);
488 ret = buffer->output[0];
489 status = buffer->output[1];
490
491 if (ret != 0 || !(status & BIT(0))) {
492 dell_smbios_release_buffer();
493 return;
494 }
495
496 dell_smbios_clear_buffer();
497
498 buffer->input[0] = 0x2;
499 dell_smbios_send_request(17, 11);
500 ret = buffer->output[0];
501 hwswitch = buffer->output[1];
502
503 dell_smbios_release_buffer();
504
505 if (ret != 0)
506 return;
507
508 dell_rfkill_update_hw_state(rfkill, radio, status, hwswitch);
509 }
510
511 static const struct rfkill_ops dell_rfkill_ops = {
512 .set_block = dell_rfkill_set,
513 .query = dell_rfkill_query,
514 };
515
516 static struct dentry *dell_laptop_dir;
517
518 static int dell_debugfs_show(struct seq_file *s, void *data)
519 {
520 struct calling_interface_buffer *buffer;
521 int hwswitch_state;
522 int hwswitch_ret;
523 int status;
524 int ret;
525
526 buffer = dell_smbios_get_buffer();
527
528 dell_smbios_send_request(17, 11);
529 ret = buffer->output[0];
530 status = buffer->output[1];
531
532 dell_smbios_clear_buffer();
533
534 buffer->input[0] = 0x2;
535 dell_smbios_send_request(17, 11);
536 hwswitch_ret = buffer->output[0];
537 hwswitch_state = buffer->output[1];
538
539 dell_smbios_release_buffer();
540
541 seq_printf(s, "return:\t%d\n", ret);
542 seq_printf(s, "status:\t0x%X\n", status);
543 seq_printf(s, "Bit 0 : Hardware switch supported: %lu\n",
544 status & BIT(0));
545 seq_printf(s, "Bit 1 : Wifi locator supported: %lu\n",
546 (status & BIT(1)) >> 1);
547 seq_printf(s, "Bit 2 : Wifi is supported: %lu\n",
548 (status & BIT(2)) >> 2);
549 seq_printf(s, "Bit 3 : Bluetooth is supported: %lu\n",
550 (status & BIT(3)) >> 3);
551 seq_printf(s, "Bit 4 : WWAN is supported: %lu\n",
552 (status & BIT(4)) >> 4);
553 seq_printf(s, "Bit 5 : Wireless keyboard supported: %lu\n",
554 (status & BIT(5)) >> 5);
555 seq_printf(s, "Bit 6 : UWB supported: %lu\n",
556 (status & BIT(6)) >> 6);
557 seq_printf(s, "Bit 7 : WiGig supported: %lu\n",
558 (status & BIT(7)) >> 7);
559 seq_printf(s, "Bit 8 : Wifi is installed: %lu\n",
560 (status & BIT(8)) >> 8);
561 seq_printf(s, "Bit 9 : Bluetooth is installed: %lu\n",
562 (status & BIT(9)) >> 9);
563 seq_printf(s, "Bit 10: WWAN is installed: %lu\n",
564 (status & BIT(10)) >> 10);
565 seq_printf(s, "Bit 11: UWB installed: %lu\n",
566 (status & BIT(11)) >> 11);
567 seq_printf(s, "Bit 12: WiGig installed: %lu\n",
568 (status & BIT(12)) >> 12);
569
570 seq_printf(s, "Bit 16: Hardware switch is on: %lu\n",
571 (status & BIT(16)) >> 16);
572 seq_printf(s, "Bit 17: Wifi is blocked: %lu\n",
573 (status & BIT(17)) >> 17);
574 seq_printf(s, "Bit 18: Bluetooth is blocked: %lu\n",
575 (status & BIT(18)) >> 18);
576 seq_printf(s, "Bit 19: WWAN is blocked: %lu\n",
577 (status & BIT(19)) >> 19);
578 seq_printf(s, "Bit 20: UWB is blocked: %lu\n",
579 (status & BIT(20)) >> 20);
580 seq_printf(s, "Bit 21: WiGig is blocked: %lu\n",
581 (status & BIT(21)) >> 21);
582
583 seq_printf(s, "\nhwswitch_return:\t%d\n", hwswitch_ret);
584 seq_printf(s, "hwswitch_state:\t0x%X\n", hwswitch_state);
585 seq_printf(s, "Bit 0 : Wifi controlled by switch: %lu\n",
586 hwswitch_state & BIT(0));
587 seq_printf(s, "Bit 1 : Bluetooth controlled by switch: %lu\n",
588 (hwswitch_state & BIT(1)) >> 1);
589 seq_printf(s, "Bit 2 : WWAN controlled by switch: %lu\n",
590 (hwswitch_state & BIT(2)) >> 2);
591 seq_printf(s, "Bit 3 : UWB controlled by switch: %lu\n",
592 (hwswitch_state & BIT(3)) >> 3);
593 seq_printf(s, "Bit 4 : WiGig controlled by switch: %lu\n",
594 (hwswitch_state & BIT(4)) >> 4);
595 seq_printf(s, "Bit 7 : Wireless switch config locked: %lu\n",
596 (hwswitch_state & BIT(7)) >> 7);
597 seq_printf(s, "Bit 8 : Wifi locator enabled: %lu\n",
598 (hwswitch_state & BIT(8)) >> 8);
599 seq_printf(s, "Bit 15: Wifi locator setting locked: %lu\n",
600 (hwswitch_state & BIT(15)) >> 15);
601
602 return 0;
603 }
604
605 static int dell_debugfs_open(struct inode *inode, struct file *file)
606 {
607 return single_open(file, dell_debugfs_show, inode->i_private);
608 }
609
610 static const struct file_operations dell_debugfs_fops = {
611 .owner = THIS_MODULE,
612 .open = dell_debugfs_open,
613 .read = seq_read,
614 .llseek = seq_lseek,
615 .release = single_release,
616 };
617
618 static void dell_update_rfkill(struct work_struct *ignored)
619 {
620 struct calling_interface_buffer *buffer;
621 int hwswitch = 0;
622 int status;
623 int ret;
624
625 buffer = dell_smbios_get_buffer();
626
627 dell_smbios_send_request(17, 11);
628 ret = buffer->output[0];
629 status = buffer->output[1];
630
631 if (ret != 0)
632 goto out;
633
634 dell_smbios_clear_buffer();
635
636 buffer->input[0] = 0x2;
637 dell_smbios_send_request(17, 11);
638 ret = buffer->output[0];
639
640 if (ret == 0 && (status & BIT(0)))
641 hwswitch = buffer->output[1];
642
643 if (wifi_rfkill) {
644 dell_rfkill_update_hw_state(wifi_rfkill, 1, status, hwswitch);
645 dell_rfkill_update_sw_state(wifi_rfkill, 1, status, buffer);
646 }
647 if (bluetooth_rfkill) {
648 dell_rfkill_update_hw_state(bluetooth_rfkill, 2, status,
649 hwswitch);
650 dell_rfkill_update_sw_state(bluetooth_rfkill, 2, status,
651 buffer);
652 }
653 if (wwan_rfkill) {
654 dell_rfkill_update_hw_state(wwan_rfkill, 3, status, hwswitch);
655 dell_rfkill_update_sw_state(wwan_rfkill, 3, status, buffer);
656 }
657
658 out:
659 dell_smbios_release_buffer();
660 }
661 static DECLARE_DELAYED_WORK(dell_rfkill_work, dell_update_rfkill);
662
663 static bool dell_laptop_i8042_filter(unsigned char data, unsigned char str,
664 struct serio *port)
665 {
666 static bool extended;
667
668 if (str & I8042_STR_AUXDATA)
669 return false;
670
671 if (unlikely(data == 0xe0)) {
672 extended = true;
673 return false;
674 } else if (unlikely(extended)) {
675 switch (data) {
676 case 0x8:
677 schedule_delayed_work(&dell_rfkill_work,
678 round_jiffies_relative(HZ / 4));
679 break;
680 }
681 extended = false;
682 }
683
684 return false;
685 }
686
687 static int (*dell_rbtn_notifier_register_func)(struct notifier_block *);
688 static int (*dell_rbtn_notifier_unregister_func)(struct notifier_block *);
689
690 static int dell_laptop_rbtn_notifier_call(struct notifier_block *nb,
691 unsigned long action, void *data)
692 {
693 schedule_delayed_work(&dell_rfkill_work, 0);
694 return NOTIFY_OK;
695 }
696
697 static struct notifier_block dell_laptop_rbtn_notifier = {
698 .notifier_call = dell_laptop_rbtn_notifier_call,
699 };
700
701 static int __init dell_setup_rfkill(void)
702 {
703 struct calling_interface_buffer *buffer;
704 int status, ret, whitelisted;
705 const char *product;
706
707 /*
708 * rfkill support causes trouble on various models, mostly Inspirons.
709 * So we whitelist certain series, and don't support rfkill on others.
710 */
711 whitelisted = 0;
712 product = dmi_get_system_info(DMI_PRODUCT_NAME);
713 if (product && (strncmp(product, "Latitude", 8) == 0 ||
714 strncmp(product, "Precision", 9) == 0))
715 whitelisted = 1;
716 if (!force_rfkill && !whitelisted)
717 return 0;
718
719 buffer = dell_smbios_get_buffer();
720 dell_smbios_send_request(17, 11);
721 ret = buffer->output[0];
722 status = buffer->output[1];
723 dell_smbios_release_buffer();
724
725 /* dell wireless info smbios call is not supported */
726 if (ret != 0)
727 return 0;
728
729 /* rfkill is only tested on laptops with a hwswitch */
730 if (!(status & BIT(0)) && !force_rfkill)
731 return 0;
732
733 if ((status & (1<<2|1<<8)) == (1<<2|1<<8)) {
734 wifi_rfkill = rfkill_alloc("dell-wifi", &platform_device->dev,
735 RFKILL_TYPE_WLAN,
736 &dell_rfkill_ops, (void *) 1);
737 if (!wifi_rfkill) {
738 ret = -ENOMEM;
739 goto err_wifi;
740 }
741 ret = rfkill_register(wifi_rfkill);
742 if (ret)
743 goto err_wifi;
744 }
745
746 if ((status & (1<<3|1<<9)) == (1<<3|1<<9)) {
747 bluetooth_rfkill = rfkill_alloc("dell-bluetooth",
748 &platform_device->dev,
749 RFKILL_TYPE_BLUETOOTH,
750 &dell_rfkill_ops, (void *) 2);
751 if (!bluetooth_rfkill) {
752 ret = -ENOMEM;
753 goto err_bluetooth;
754 }
755 ret = rfkill_register(bluetooth_rfkill);
756 if (ret)
757 goto err_bluetooth;
758 }
759
760 if ((status & (1<<4|1<<10)) == (1<<4|1<<10)) {
761 wwan_rfkill = rfkill_alloc("dell-wwan",
762 &platform_device->dev,
763 RFKILL_TYPE_WWAN,
764 &dell_rfkill_ops, (void *) 3);
765 if (!wwan_rfkill) {
766 ret = -ENOMEM;
767 goto err_wwan;
768 }
769 ret = rfkill_register(wwan_rfkill);
770 if (ret)
771 goto err_wwan;
772 }
773
774 /*
775 * Dell Airplane Mode Switch driver (dell-rbtn) supports ACPI devices
776 * which can receive events from HW slider switch.
777 *
778 * Dell SMBIOS on whitelisted models supports controlling radio devices
779 * but does not support receiving HW button switch events. We can use
780 * i8042 filter hook function to receive keyboard data and handle
781 * keycode for HW button.
782 *
783 * So if it is possible we will use Dell Airplane Mode Switch ACPI
784 * driver for receiving HW events and Dell SMBIOS for setting rfkill
785 * states. If ACPI driver or device is not available we will fallback to
786 * i8042 filter hook function.
787 *
788 * To prevent duplicate rfkill devices which control and do same thing,
789 * dell-rbtn driver will automatically remove its own rfkill devices
790 * once function dell_rbtn_notifier_register() is called.
791 */
792
793 dell_rbtn_notifier_register_func =
794 symbol_request(dell_rbtn_notifier_register);
795 if (dell_rbtn_notifier_register_func) {
796 dell_rbtn_notifier_unregister_func =
797 symbol_request(dell_rbtn_notifier_unregister);
798 if (!dell_rbtn_notifier_unregister_func) {
799 symbol_put(dell_rbtn_notifier_register);
800 dell_rbtn_notifier_register_func = NULL;
801 }
802 }
803
804 if (dell_rbtn_notifier_register_func) {
805 ret = dell_rbtn_notifier_register_func(
806 &dell_laptop_rbtn_notifier);
807 symbol_put(dell_rbtn_notifier_register);
808 dell_rbtn_notifier_register_func = NULL;
809 if (ret != 0) {
810 symbol_put(dell_rbtn_notifier_unregister);
811 dell_rbtn_notifier_unregister_func = NULL;
812 }
813 } else {
814 pr_info("Symbols from dell-rbtn acpi driver are not available\n");
815 ret = -ENODEV;
816 }
817
818 if (ret == 0) {
819 pr_info("Using dell-rbtn acpi driver for receiving events\n");
820 } else if (ret != -ENODEV) {
821 pr_warn("Unable to register dell rbtn notifier\n");
822 goto err_filter;
823 } else {
824 ret = i8042_install_filter(dell_laptop_i8042_filter);
825 if (ret) {
826 pr_warn("Unable to install key filter\n");
827 goto err_filter;
828 }
829 pr_info("Using i8042 filter function for receiving events\n");
830 }
831
832 return 0;
833 err_filter:
834 if (wwan_rfkill)
835 rfkill_unregister(wwan_rfkill);
836 err_wwan:
837 rfkill_destroy(wwan_rfkill);
838 if (bluetooth_rfkill)
839 rfkill_unregister(bluetooth_rfkill);
840 err_bluetooth:
841 rfkill_destroy(bluetooth_rfkill);
842 if (wifi_rfkill)
843 rfkill_unregister(wifi_rfkill);
844 err_wifi:
845 rfkill_destroy(wifi_rfkill);
846
847 return ret;
848 }
849
850 static void dell_cleanup_rfkill(void)
851 {
852 if (dell_rbtn_notifier_unregister_func) {
853 dell_rbtn_notifier_unregister_func(&dell_laptop_rbtn_notifier);
854 symbol_put(dell_rbtn_notifier_unregister);
855 dell_rbtn_notifier_unregister_func = NULL;
856 } else {
857 i8042_remove_filter(dell_laptop_i8042_filter);
858 }
859 cancel_delayed_work_sync(&dell_rfkill_work);
860 if (wifi_rfkill) {
861 rfkill_unregister(wifi_rfkill);
862 rfkill_destroy(wifi_rfkill);
863 }
864 if (bluetooth_rfkill) {
865 rfkill_unregister(bluetooth_rfkill);
866 rfkill_destroy(bluetooth_rfkill);
867 }
868 if (wwan_rfkill) {
869 rfkill_unregister(wwan_rfkill);
870 rfkill_destroy(wwan_rfkill);
871 }
872 }
873
874 static int dell_send_intensity(struct backlight_device *bd)
875 {
876 struct calling_interface_buffer *buffer;
877 struct calling_interface_token *token;
878 int ret;
879
880 token = dell_smbios_find_token(BRIGHTNESS_TOKEN);
881 if (!token)
882 return -ENODEV;
883
884 buffer = dell_smbios_get_buffer();
885 buffer->input[0] = token->location;
886 buffer->input[1] = bd->props.brightness;
887
888 if (power_supply_is_system_supplied() > 0)
889 dell_smbios_send_request(1, 2);
890 else
891 dell_smbios_send_request(1, 1);
892
893 ret = dell_smbios_error(buffer->output[0]);
894
895 dell_smbios_release_buffer();
896 return ret;
897 }
898
899 static int dell_get_intensity(struct backlight_device *bd)
900 {
901 struct calling_interface_buffer *buffer;
902 struct calling_interface_token *token;
903 int ret;
904
905 token = dell_smbios_find_token(BRIGHTNESS_TOKEN);
906 if (!token)
907 return -ENODEV;
908
909 buffer = dell_smbios_get_buffer();
910 buffer->input[0] = token->location;
911
912 if (power_supply_is_system_supplied() > 0)
913 dell_smbios_send_request(0, 2);
914 else
915 dell_smbios_send_request(0, 1);
916
917 if (buffer->output[0])
918 ret = dell_smbios_error(buffer->output[0]);
919 else
920 ret = buffer->output[1];
921
922 dell_smbios_release_buffer();
923 return ret;
924 }
925
926 static const struct backlight_ops dell_ops = {
927 .get_brightness = dell_get_intensity,
928 .update_status = dell_send_intensity,
929 };
930
931 static void touchpad_led_on(void)
932 {
933 int command = 0x97;
934 char data = 1;
935 i8042_command(&data, command | 1 << 12);
936 }
937
938 static void touchpad_led_off(void)
939 {
940 int command = 0x97;
941 char data = 2;
942 i8042_command(&data, command | 1 << 12);
943 }
944
945 static void touchpad_led_set(struct led_classdev *led_cdev,
946 enum led_brightness value)
947 {
948 if (value > 0)
949 touchpad_led_on();
950 else
951 touchpad_led_off();
952 }
953
954 static struct led_classdev touchpad_led = {
955 .name = "dell-laptop::touchpad",
956 .brightness_set = touchpad_led_set,
957 .flags = LED_CORE_SUSPENDRESUME,
958 };
959
960 static int __init touchpad_led_init(struct device *dev)
961 {
962 return led_classdev_register(dev, &touchpad_led);
963 }
964
965 static void touchpad_led_exit(void)
966 {
967 led_classdev_unregister(&touchpad_led);
968 }
969
970 /*
971 * Derived from information in smbios-keyboard-ctl:
972 *
973 * cbClass 4
974 * cbSelect 11
975 * Keyboard illumination
976 * cbArg1 determines the function to be performed
977 *
978 * cbArg1 0x0 = Get Feature Information
979 * cbRES1 Standard return codes (0, -1, -2)
980 * cbRES2, word0 Bitmap of user-selectable modes
981 * bit 0 Always off (All systems)
982 * bit 1 Always on (Travis ATG, Siberia)
983 * bit 2 Auto: ALS-based On; ALS-based Off (Travis ATG)
984 * bit 3 Auto: ALS- and input-activity-based On; input-activity based Off
985 * bit 4 Auto: Input-activity-based On; input-activity based Off
986 * bit 5 Auto: Input-activity-based On (illumination level 25%); input-activity based Off
987 * bit 6 Auto: Input-activity-based On (illumination level 50%); input-activity based Off
988 * bit 7 Auto: Input-activity-based On (illumination level 75%); input-activity based Off
989 * bit 8 Auto: Input-activity-based On (illumination level 100%); input-activity based Off
990 * bits 9-15 Reserved for future use
991 * cbRES2, byte2 Reserved for future use
992 * cbRES2, byte3 Keyboard illumination type
993 * 0 Reserved
994 * 1 Tasklight
995 * 2 Backlight
996 * 3-255 Reserved for future use
997 * cbRES3, byte0 Supported auto keyboard illumination trigger bitmap.
998 * bit 0 Any keystroke
999 * bit 1 Touchpad activity
1000 * bit 2 Pointing stick
1001 * bit 3 Any mouse
1002 * bits 4-7 Reserved for future use
1003 * cbRES3, byte1 Supported timeout unit bitmap
1004 * bit 0 Seconds
1005 * bit 1 Minutes
1006 * bit 2 Hours
1007 * bit 3 Days
1008 * bits 4-7 Reserved for future use
1009 * cbRES3, byte2 Number of keyboard light brightness levels
1010 * cbRES4, byte0 Maximum acceptable seconds value (0 if seconds not supported).
1011 * cbRES4, byte1 Maximum acceptable minutes value (0 if minutes not supported).
1012 * cbRES4, byte2 Maximum acceptable hours value (0 if hours not supported).
1013 * cbRES4, byte3 Maximum acceptable days value (0 if days not supported)
1014 *
1015 * cbArg1 0x1 = Get Current State
1016 * cbRES1 Standard return codes (0, -1, -2)
1017 * cbRES2, word0 Bitmap of current mode state
1018 * bit 0 Always off (All systems)
1019 * bit 1 Always on (Travis ATG, Siberia)
1020 * bit 2 Auto: ALS-based On; ALS-based Off (Travis ATG)
1021 * bit 3 Auto: ALS- and input-activity-based On; input-activity based Off
1022 * bit 4 Auto: Input-activity-based On; input-activity based Off
1023 * bit 5 Auto: Input-activity-based On (illumination level 25%); input-activity based Off
1024 * bit 6 Auto: Input-activity-based On (illumination level 50%); input-activity based Off
1025 * bit 7 Auto: Input-activity-based On (illumination level 75%); input-activity based Off
1026 * bit 8 Auto: Input-activity-based On (illumination level 100%); input-activity based Off
1027 * bits 9-15 Reserved for future use
1028 * Note: Only One bit can be set
1029 * cbRES2, byte2 Currently active auto keyboard illumination triggers.
1030 * bit 0 Any keystroke
1031 * bit 1 Touchpad activity
1032 * bit 2 Pointing stick
1033 * bit 3 Any mouse
1034 * bits 4-7 Reserved for future use
1035 * cbRES2, byte3 Current Timeout
1036 * bits 7:6 Timeout units indicator:
1037 * 00b Seconds
1038 * 01b Minutes
1039 * 10b Hours
1040 * 11b Days
1041 * bits 5:0 Timeout value (0-63) in sec/min/hr/day
1042 * NOTE: A value of 0 means always on (no timeout) if any bits of RES3 byte
1043 * are set upon return from the [Get feature information] call.
1044 * cbRES3, byte0 Current setting of ALS value that turns the light on or off.
1045 * cbRES3, byte1 Current ALS reading
1046 * cbRES3, byte2 Current keyboard light level.
1047 *
1048 * cbArg1 0x2 = Set New State
1049 * cbRES1 Standard return codes (0, -1, -2)
1050 * cbArg2, word0 Bitmap of current mode state
1051 * bit 0 Always off (All systems)
1052 * bit 1 Always on (Travis ATG, Siberia)
1053 * bit 2 Auto: ALS-based On; ALS-based Off (Travis ATG)
1054 * bit 3 Auto: ALS- and input-activity-based On; input-activity based Off
1055 * bit 4 Auto: Input-activity-based On; input-activity based Off
1056 * bit 5 Auto: Input-activity-based On (illumination level 25%); input-activity based Off
1057 * bit 6 Auto: Input-activity-based On (illumination level 50%); input-activity based Off
1058 * bit 7 Auto: Input-activity-based On (illumination level 75%); input-activity based Off
1059 * bit 8 Auto: Input-activity-based On (illumination level 100%); input-activity based Off
1060 * bits 9-15 Reserved for future use
1061 * Note: Only One bit can be set
1062 * cbArg2, byte2 Desired auto keyboard illumination triggers. Must remain inactive to allow
1063 * keyboard to turn off automatically.
1064 * bit 0 Any keystroke
1065 * bit 1 Touchpad activity
1066 * bit 2 Pointing stick
1067 * bit 3 Any mouse
1068 * bits 4-7 Reserved for future use
1069 * cbArg2, byte3 Desired Timeout
1070 * bits 7:6 Timeout units indicator:
1071 * 00b Seconds
1072 * 01b Minutes
1073 * 10b Hours
1074 * 11b Days
1075 * bits 5:0 Timeout value (0-63) in sec/min/hr/day
1076 * cbArg3, byte0 Desired setting of ALS value that turns the light on or off.
1077 * cbArg3, byte2 Desired keyboard light level.
1078 */
1079
1080
1081 enum kbd_timeout_unit {
1082 KBD_TIMEOUT_SECONDS = 0,
1083 KBD_TIMEOUT_MINUTES,
1084 KBD_TIMEOUT_HOURS,
1085 KBD_TIMEOUT_DAYS,
1086 };
1087
1088 enum kbd_mode_bit {
1089 KBD_MODE_BIT_OFF = 0,
1090 KBD_MODE_BIT_ON,
1091 KBD_MODE_BIT_ALS,
1092 KBD_MODE_BIT_TRIGGER_ALS,
1093 KBD_MODE_BIT_TRIGGER,
1094 KBD_MODE_BIT_TRIGGER_25,
1095 KBD_MODE_BIT_TRIGGER_50,
1096 KBD_MODE_BIT_TRIGGER_75,
1097 KBD_MODE_BIT_TRIGGER_100,
1098 };
1099
1100 #define kbd_is_als_mode_bit(bit) \
1101 ((bit) == KBD_MODE_BIT_ALS || (bit) == KBD_MODE_BIT_TRIGGER_ALS)
1102 #define kbd_is_trigger_mode_bit(bit) \
1103 ((bit) >= KBD_MODE_BIT_TRIGGER_ALS && (bit) <= KBD_MODE_BIT_TRIGGER_100)
1104 #define kbd_is_level_mode_bit(bit) \
1105 ((bit) >= KBD_MODE_BIT_TRIGGER_25 && (bit) <= KBD_MODE_BIT_TRIGGER_100)
1106
1107 struct kbd_info {
1108 u16 modes;
1109 u8 type;
1110 u8 triggers;
1111 u8 levels;
1112 u8 seconds;
1113 u8 minutes;
1114 u8 hours;
1115 u8 days;
1116 };
1117
1118 struct kbd_state {
1119 u8 mode_bit;
1120 u8 triggers;
1121 u8 timeout_value;
1122 u8 timeout_unit;
1123 u8 als_setting;
1124 u8 als_value;
1125 u8 level;
1126 };
1127
1128 static const int kbd_tokens[] = {
1129 KBD_LED_OFF_TOKEN,
1130 KBD_LED_AUTO_25_TOKEN,
1131 KBD_LED_AUTO_50_TOKEN,
1132 KBD_LED_AUTO_75_TOKEN,
1133 KBD_LED_AUTO_100_TOKEN,
1134 KBD_LED_ON_TOKEN,
1135 };
1136
1137 static u16 kbd_token_bits;
1138
1139 static struct kbd_info kbd_info;
1140 static bool kbd_als_supported;
1141 static bool kbd_triggers_supported;
1142
1143 static u8 kbd_mode_levels[16];
1144 static int kbd_mode_levels_count;
1145
1146 static u8 kbd_previous_level;
1147 static u8 kbd_previous_mode_bit;
1148
1149 static bool kbd_led_present;
1150
1151 /*
1152 * NOTE: there are three ways to set the keyboard backlight level.
1153 * First, via kbd_state.mode_bit (assigning KBD_MODE_BIT_TRIGGER_* value).
1154 * Second, via kbd_state.level (assigning numerical value <= kbd_info.levels).
1155 * Third, via SMBIOS tokens (KBD_LED_* in kbd_tokens)
1156 *
1157 * There are laptops which support only one of these methods. If we want to
1158 * support as many machines as possible we need to implement all three methods.
1159 * The first two methods use the kbd_state structure. The third uses SMBIOS
1160 * tokens. If kbd_info.levels == 0, the machine does not support setting the
1161 * keyboard backlight level via kbd_state.level.
1162 */
1163
1164 static int kbd_get_info(struct kbd_info *info)
1165 {
1166 struct calling_interface_buffer *buffer;
1167 u8 units;
1168 int ret;
1169
1170 buffer = dell_smbios_get_buffer();
1171
1172 buffer->input[0] = 0x0;
1173 dell_smbios_send_request(4, 11);
1174 ret = buffer->output[0];
1175
1176 if (ret) {
1177 ret = dell_smbios_error(ret);
1178 goto out;
1179 }
1180
1181 info->modes = buffer->output[1] & 0xFFFF;
1182 info->type = (buffer->output[1] >> 24) & 0xFF;
1183 info->triggers = buffer->output[2] & 0xFF;
1184 units = (buffer->output[2] >> 8) & 0xFF;
1185 info->levels = (buffer->output[2] >> 16) & 0xFF;
1186
1187 if (quirks && quirks->kbd_led_levels_off_1 && info->levels)
1188 info->levels--;
1189
1190 if (units & BIT(0))
1191 info->seconds = (buffer->output[3] >> 0) & 0xFF;
1192 if (units & BIT(1))
1193 info->minutes = (buffer->output[3] >> 8) & 0xFF;
1194 if (units & BIT(2))
1195 info->hours = (buffer->output[3] >> 16) & 0xFF;
1196 if (units & BIT(3))
1197 info->days = (buffer->output[3] >> 24) & 0xFF;
1198
1199 out:
1200 dell_smbios_release_buffer();
1201 return ret;
1202 }
1203
1204 static unsigned int kbd_get_max_level(void)
1205 {
1206 if (kbd_info.levels != 0)
1207 return kbd_info.levels;
1208 if (kbd_mode_levels_count > 0)
1209 return kbd_mode_levels_count - 1;
1210 return 0;
1211 }
1212
1213 static int kbd_get_level(struct kbd_state *state)
1214 {
1215 int i;
1216
1217 if (kbd_info.levels != 0)
1218 return state->level;
1219
1220 if (kbd_mode_levels_count > 0) {
1221 for (i = 0; i < kbd_mode_levels_count; ++i)
1222 if (kbd_mode_levels[i] == state->mode_bit)
1223 return i;
1224 return 0;
1225 }
1226
1227 return -EINVAL;
1228 }
1229
1230 static int kbd_set_level(struct kbd_state *state, u8 level)
1231 {
1232 if (kbd_info.levels != 0) {
1233 if (level != 0)
1234 kbd_previous_level = level;
1235 if (state->level == level)
1236 return 0;
1237 state->level = level;
1238 if (level != 0 && state->mode_bit == KBD_MODE_BIT_OFF)
1239 state->mode_bit = kbd_previous_mode_bit;
1240 else if (level == 0 && state->mode_bit != KBD_MODE_BIT_OFF) {
1241 kbd_previous_mode_bit = state->mode_bit;
1242 state->mode_bit = KBD_MODE_BIT_OFF;
1243 }
1244 return 0;
1245 }
1246
1247 if (kbd_mode_levels_count > 0 && level < kbd_mode_levels_count) {
1248 if (level != 0)
1249 kbd_previous_level = level;
1250 state->mode_bit = kbd_mode_levels[level];
1251 return 0;
1252 }
1253
1254 return -EINVAL;
1255 }
1256
1257 static int kbd_get_state(struct kbd_state *state)
1258 {
1259 struct calling_interface_buffer *buffer;
1260 int ret;
1261
1262 buffer = dell_smbios_get_buffer();
1263
1264 buffer->input[0] = 0x1;
1265 dell_smbios_send_request(4, 11);
1266 ret = buffer->output[0];
1267
1268 if (ret) {
1269 ret = dell_smbios_error(ret);
1270 goto out;
1271 }
1272
1273 state->mode_bit = ffs(buffer->output[1] & 0xFFFF);
1274 if (state->mode_bit != 0)
1275 state->mode_bit--;
1276
1277 state->triggers = (buffer->output[1] >> 16) & 0xFF;
1278 state->timeout_value = (buffer->output[1] >> 24) & 0x3F;
1279 state->timeout_unit = (buffer->output[1] >> 30) & 0x3;
1280 state->als_setting = buffer->output[2] & 0xFF;
1281 state->als_value = (buffer->output[2] >> 8) & 0xFF;
1282 state->level = (buffer->output[2] >> 16) & 0xFF;
1283
1284 out:
1285 dell_smbios_release_buffer();
1286 return ret;
1287 }
1288
1289 static int kbd_set_state(struct kbd_state *state)
1290 {
1291 struct calling_interface_buffer *buffer;
1292 int ret;
1293
1294 buffer = dell_smbios_get_buffer();
1295 buffer->input[0] = 0x2;
1296 buffer->input[1] = BIT(state->mode_bit) & 0xFFFF;
1297 buffer->input[1] |= (state->triggers & 0xFF) << 16;
1298 buffer->input[1] |= (state->timeout_value & 0x3F) << 24;
1299 buffer->input[1] |= (state->timeout_unit & 0x3) << 30;
1300 buffer->input[2] = state->als_setting & 0xFF;
1301 buffer->input[2] |= (state->level & 0xFF) << 16;
1302 dell_smbios_send_request(4, 11);
1303 ret = buffer->output[0];
1304 dell_smbios_release_buffer();
1305
1306 return dell_smbios_error(ret);
1307 }
1308
1309 static int kbd_set_state_safe(struct kbd_state *state, struct kbd_state *old)
1310 {
1311 int ret;
1312
1313 ret = kbd_set_state(state);
1314 if (ret == 0)
1315 return 0;
1316
1317 /*
1318 * When setting the new state fails,try to restore the previous one.
1319 * This is needed on some machines where BIOS sets a default state when
1320 * setting a new state fails. This default state could be all off.
1321 */
1322
1323 if (kbd_set_state(old))
1324 pr_err("Setting old previous keyboard state failed\n");
1325
1326 return ret;
1327 }
1328
1329 static int kbd_set_token_bit(u8 bit)
1330 {
1331 struct calling_interface_buffer *buffer;
1332 struct calling_interface_token *token;
1333 int ret;
1334
1335 if (bit >= ARRAY_SIZE(kbd_tokens))
1336 return -EINVAL;
1337
1338 token = dell_smbios_find_token(kbd_tokens[bit]);
1339 if (!token)
1340 return -EINVAL;
1341
1342 buffer = dell_smbios_get_buffer();
1343 buffer->input[0] = token->location;
1344 buffer->input[1] = token->value;
1345 dell_smbios_send_request(1, 0);
1346 ret = buffer->output[0];
1347 dell_smbios_release_buffer();
1348
1349 return dell_smbios_error(ret);
1350 }
1351
1352 static int kbd_get_token_bit(u8 bit)
1353 {
1354 struct calling_interface_buffer *buffer;
1355 struct calling_interface_token *token;
1356 int ret;
1357 int val;
1358
1359 if (bit >= ARRAY_SIZE(kbd_tokens))
1360 return -EINVAL;
1361
1362 token = dell_smbios_find_token(kbd_tokens[bit]);
1363 if (!token)
1364 return -EINVAL;
1365
1366 buffer = dell_smbios_get_buffer();
1367 buffer->input[0] = token->location;
1368 dell_smbios_send_request(0, 0);
1369 ret = buffer->output[0];
1370 val = buffer->output[1];
1371 dell_smbios_release_buffer();
1372
1373 if (ret)
1374 return dell_smbios_error(ret);
1375
1376 return (val == token->value);
1377 }
1378
1379 static int kbd_get_first_active_token_bit(void)
1380 {
1381 int i;
1382 int ret;
1383
1384 for (i = 0; i < ARRAY_SIZE(kbd_tokens); ++i) {
1385 ret = kbd_get_token_bit(i);
1386 if (ret == 1)
1387 return i;
1388 }
1389
1390 return ret;
1391 }
1392
1393 static int kbd_get_valid_token_counts(void)
1394 {
1395 return hweight16(kbd_token_bits);
1396 }
1397
1398 static inline int kbd_init_info(void)
1399 {
1400 struct kbd_state state;
1401 int ret;
1402 int i;
1403
1404 ret = kbd_get_info(&kbd_info);
1405 if (ret)
1406 return ret;
1407
1408 kbd_get_state(&state);
1409
1410 /* NOTE: timeout value is stored in 6 bits so max value is 63 */
1411 if (kbd_info.seconds > 63)
1412 kbd_info.seconds = 63;
1413 if (kbd_info.minutes > 63)
1414 kbd_info.minutes = 63;
1415 if (kbd_info.hours > 63)
1416 kbd_info.hours = 63;
1417 if (kbd_info.days > 63)
1418 kbd_info.days = 63;
1419
1420 /* NOTE: On tested machines ON mode did not work and caused
1421 * problems (turned backlight off) so do not use it
1422 */
1423 kbd_info.modes &= ~BIT(KBD_MODE_BIT_ON);
1424
1425 kbd_previous_level = kbd_get_level(&state);
1426 kbd_previous_mode_bit = state.mode_bit;
1427
1428 if (kbd_previous_level == 0 && kbd_get_max_level() != 0)
1429 kbd_previous_level = 1;
1430
1431 if (kbd_previous_mode_bit == KBD_MODE_BIT_OFF) {
1432 kbd_previous_mode_bit =
1433 ffs(kbd_info.modes & ~BIT(KBD_MODE_BIT_OFF));
1434 if (kbd_previous_mode_bit != 0)
1435 kbd_previous_mode_bit--;
1436 }
1437
1438 if (kbd_info.modes & (BIT(KBD_MODE_BIT_ALS) |
1439 BIT(KBD_MODE_BIT_TRIGGER_ALS)))
1440 kbd_als_supported = true;
1441
1442 if (kbd_info.modes & (
1443 BIT(KBD_MODE_BIT_TRIGGER_ALS) | BIT(KBD_MODE_BIT_TRIGGER) |
1444 BIT(KBD_MODE_BIT_TRIGGER_25) | BIT(KBD_MODE_BIT_TRIGGER_50) |
1445 BIT(KBD_MODE_BIT_TRIGGER_75) | BIT(KBD_MODE_BIT_TRIGGER_100)
1446 ))
1447 kbd_triggers_supported = true;
1448
1449 /* kbd_mode_levels[0] is reserved, see below */
1450 for (i = 0; i < 16; ++i)
1451 if (kbd_is_level_mode_bit(i) && (BIT(i) & kbd_info.modes))
1452 kbd_mode_levels[1 + kbd_mode_levels_count++] = i;
1453
1454 /*
1455 * Find the first supported mode and assign to kbd_mode_levels[0].
1456 * This should be 0 (off), but we cannot depend on the BIOS to
1457 * support 0.
1458 */
1459 if (kbd_mode_levels_count > 0) {
1460 for (i = 0; i < 16; ++i) {
1461 if (BIT(i) & kbd_info.modes) {
1462 kbd_mode_levels[0] = i;
1463 break;
1464 }
1465 }
1466 kbd_mode_levels_count++;
1467 }
1468
1469 return 0;
1470
1471 }
1472
1473 static inline void kbd_init_tokens(void)
1474 {
1475 int i;
1476
1477 for (i = 0; i < ARRAY_SIZE(kbd_tokens); ++i)
1478 if (dell_smbios_find_token(kbd_tokens[i]))
1479 kbd_token_bits |= BIT(i);
1480 }
1481
1482 static void kbd_init(void)
1483 {
1484 int ret;
1485
1486 ret = kbd_init_info();
1487 kbd_init_tokens();
1488
1489 if (kbd_token_bits != 0 || ret == 0)
1490 kbd_led_present = true;
1491 }
1492
1493 static ssize_t kbd_led_timeout_store(struct device *dev,
1494 struct device_attribute *attr,
1495 const char *buf, size_t count)
1496 {
1497 struct kbd_state new_state;
1498 struct kbd_state state;
1499 bool convert;
1500 int value;
1501 int ret;
1502 char ch;
1503 u8 unit;
1504 int i;
1505
1506 ret = sscanf(buf, "%d %c", &value, &ch);
1507 if (ret < 1)
1508 return -EINVAL;
1509 else if (ret == 1)
1510 ch = 's';
1511
1512 if (value < 0)
1513 return -EINVAL;
1514
1515 convert = false;
1516
1517 switch (ch) {
1518 case 's':
1519 if (value > kbd_info.seconds)
1520 convert = true;
1521 unit = KBD_TIMEOUT_SECONDS;
1522 break;
1523 case 'm':
1524 if (value > kbd_info.minutes)
1525 convert = true;
1526 unit = KBD_TIMEOUT_MINUTES;
1527 break;
1528 case 'h':
1529 if (value > kbd_info.hours)
1530 convert = true;
1531 unit = KBD_TIMEOUT_HOURS;
1532 break;
1533 case 'd':
1534 if (value > kbd_info.days)
1535 convert = true;
1536 unit = KBD_TIMEOUT_DAYS;
1537 break;
1538 default:
1539 return -EINVAL;
1540 }
1541
1542 if (quirks && quirks->needs_kbd_timeouts)
1543 convert = true;
1544
1545 if (convert) {
1546 /* Convert value from current units to seconds */
1547 switch (unit) {
1548 case KBD_TIMEOUT_DAYS:
1549 value *= 24;
1550 case KBD_TIMEOUT_HOURS:
1551 value *= 60;
1552 case KBD_TIMEOUT_MINUTES:
1553 value *= 60;
1554 unit = KBD_TIMEOUT_SECONDS;
1555 }
1556
1557 if (quirks && quirks->needs_kbd_timeouts) {
1558 for (i = 0; quirks->kbd_timeouts[i] != -1; i++) {
1559 if (value <= quirks->kbd_timeouts[i]) {
1560 value = quirks->kbd_timeouts[i];
1561 break;
1562 }
1563 }
1564 }
1565
1566 if (value <= kbd_info.seconds && kbd_info.seconds) {
1567 unit = KBD_TIMEOUT_SECONDS;
1568 } else if (value / 60 <= kbd_info.minutes && kbd_info.minutes) {
1569 value /= 60;
1570 unit = KBD_TIMEOUT_MINUTES;
1571 } else if (value / (60 * 60) <= kbd_info.hours && kbd_info.hours) {
1572 value /= (60 * 60);
1573 unit = KBD_TIMEOUT_HOURS;
1574 } else if (value / (60 * 60 * 24) <= kbd_info.days && kbd_info.days) {
1575 value /= (60 * 60 * 24);
1576 unit = KBD_TIMEOUT_DAYS;
1577 } else {
1578 return -EINVAL;
1579 }
1580 }
1581
1582 ret = kbd_get_state(&state);
1583 if (ret)
1584 return ret;
1585
1586 new_state = state;
1587 new_state.timeout_value = value;
1588 new_state.timeout_unit = unit;
1589
1590 ret = kbd_set_state_safe(&new_state, &state);
1591 if (ret)
1592 return ret;
1593
1594 return count;
1595 }
1596
1597 static ssize_t kbd_led_timeout_show(struct device *dev,
1598 struct device_attribute *attr, char *buf)
1599 {
1600 struct kbd_state state;
1601 int ret;
1602 int len;
1603
1604 ret = kbd_get_state(&state);
1605 if (ret)
1606 return ret;
1607
1608 len = sprintf(buf, "%d", state.timeout_value);
1609
1610 switch (state.timeout_unit) {
1611 case KBD_TIMEOUT_SECONDS:
1612 return len + sprintf(buf+len, "s\n");
1613 case KBD_TIMEOUT_MINUTES:
1614 return len + sprintf(buf+len, "m\n");
1615 case KBD_TIMEOUT_HOURS:
1616 return len + sprintf(buf+len, "h\n");
1617 case KBD_TIMEOUT_DAYS:
1618 return len + sprintf(buf+len, "d\n");
1619 default:
1620 return -EINVAL;
1621 }
1622
1623 return len;
1624 }
1625
1626 static DEVICE_ATTR(stop_timeout, S_IRUGO | S_IWUSR,
1627 kbd_led_timeout_show, kbd_led_timeout_store);
1628
1629 static const char * const kbd_led_triggers[] = {
1630 "keyboard",
1631 "touchpad",
1632 /*"trackstick"*/ NULL, /* NOTE: trackstick is just alias for touchpad */
1633 "mouse",
1634 };
1635
1636 static ssize_t kbd_led_triggers_store(struct device *dev,
1637 struct device_attribute *attr,
1638 const char *buf, size_t count)
1639 {
1640 struct kbd_state new_state;
1641 struct kbd_state state;
1642 bool triggers_enabled = false;
1643 int trigger_bit = -1;
1644 char trigger[21];
1645 int i, ret;
1646
1647 ret = sscanf(buf, "%20s", trigger);
1648 if (ret != 1)
1649 return -EINVAL;
1650
1651 if (trigger[0] != '+' && trigger[0] != '-')
1652 return -EINVAL;
1653
1654 ret = kbd_get_state(&state);
1655 if (ret)
1656 return ret;
1657
1658 if (kbd_triggers_supported)
1659 triggers_enabled = kbd_is_trigger_mode_bit(state.mode_bit);
1660
1661 if (kbd_triggers_supported) {
1662 for (i = 0; i < ARRAY_SIZE(kbd_led_triggers); ++i) {
1663 if (!(kbd_info.triggers & BIT(i)))
1664 continue;
1665 if (!kbd_led_triggers[i])
1666 continue;
1667 if (strcmp(trigger+1, kbd_led_triggers[i]) != 0)
1668 continue;
1669 if (trigger[0] == '+' &&
1670 triggers_enabled && (state.triggers & BIT(i)))
1671 return count;
1672 if (trigger[0] == '-' &&
1673 (!triggers_enabled || !(state.triggers & BIT(i))))
1674 return count;
1675 trigger_bit = i;
1676 break;
1677 }
1678 }
1679
1680 if (trigger_bit != -1) {
1681 new_state = state;
1682 if (trigger[0] == '+')
1683 new_state.triggers |= BIT(trigger_bit);
1684 else {
1685 new_state.triggers &= ~BIT(trigger_bit);
1686 /* NOTE: trackstick bit (2) must be disabled when
1687 * disabling touchpad bit (1), otherwise touchpad
1688 * bit (1) will not be disabled */
1689 if (trigger_bit == 1)
1690 new_state.triggers &= ~BIT(2);
1691 }
1692 if ((kbd_info.triggers & new_state.triggers) !=
1693 new_state.triggers)
1694 return -EINVAL;
1695 if (new_state.triggers && !triggers_enabled) {
1696 new_state.mode_bit = KBD_MODE_BIT_TRIGGER;
1697 kbd_set_level(&new_state, kbd_previous_level);
1698 } else if (new_state.triggers == 0) {
1699 kbd_set_level(&new_state, 0);
1700 }
1701 if (!(kbd_info.modes & BIT(new_state.mode_bit)))
1702 return -EINVAL;
1703 ret = kbd_set_state_safe(&new_state, &state);
1704 if (ret)
1705 return ret;
1706 if (new_state.mode_bit != KBD_MODE_BIT_OFF)
1707 kbd_previous_mode_bit = new_state.mode_bit;
1708 return count;
1709 }
1710
1711 return -EINVAL;
1712 }
1713
1714 static ssize_t kbd_led_triggers_show(struct device *dev,
1715 struct device_attribute *attr, char *buf)
1716 {
1717 struct kbd_state state;
1718 bool triggers_enabled;
1719 int level, i, ret;
1720 int len = 0;
1721
1722 ret = kbd_get_state(&state);
1723 if (ret)
1724 return ret;
1725
1726 len = 0;
1727
1728 if (kbd_triggers_supported) {
1729 triggers_enabled = kbd_is_trigger_mode_bit(state.mode_bit);
1730 level = kbd_get_level(&state);
1731 for (i = 0; i < ARRAY_SIZE(kbd_led_triggers); ++i) {
1732 if (!(kbd_info.triggers & BIT(i)))
1733 continue;
1734 if (!kbd_led_triggers[i])
1735 continue;
1736 if ((triggers_enabled || level <= 0) &&
1737 (state.triggers & BIT(i)))
1738 buf[len++] = '+';
1739 else
1740 buf[len++] = '-';
1741 len += sprintf(buf+len, "%s ", kbd_led_triggers[i]);
1742 }
1743 }
1744
1745 if (len)
1746 buf[len - 1] = '\n';
1747
1748 return len;
1749 }
1750
1751 static DEVICE_ATTR(start_triggers, S_IRUGO | S_IWUSR,
1752 kbd_led_triggers_show, kbd_led_triggers_store);
1753
1754 static ssize_t kbd_led_als_enabled_store(struct device *dev,
1755 struct device_attribute *attr,
1756 const char *buf, size_t count)
1757 {
1758 struct kbd_state new_state;
1759 struct kbd_state state;
1760 bool triggers_enabled = false;
1761 int enable;
1762 int ret;
1763
1764 ret = kstrtoint(buf, 0, &enable);
1765 if (ret)
1766 return ret;
1767
1768 ret = kbd_get_state(&state);
1769 if (ret)
1770 return ret;
1771
1772 if (enable == kbd_is_als_mode_bit(state.mode_bit))
1773 return count;
1774
1775 new_state = state;
1776
1777 if (kbd_triggers_supported)
1778 triggers_enabled = kbd_is_trigger_mode_bit(state.mode_bit);
1779
1780 if (enable) {
1781 if (triggers_enabled)
1782 new_state.mode_bit = KBD_MODE_BIT_TRIGGER_ALS;
1783 else
1784 new_state.mode_bit = KBD_MODE_BIT_ALS;
1785 } else {
1786 if (triggers_enabled) {
1787 new_state.mode_bit = KBD_MODE_BIT_TRIGGER;
1788 kbd_set_level(&new_state, kbd_previous_level);
1789 } else {
1790 new_state.mode_bit = KBD_MODE_BIT_ON;
1791 }
1792 }
1793 if (!(kbd_info.modes & BIT(new_state.mode_bit)))
1794 return -EINVAL;
1795
1796 ret = kbd_set_state_safe(&new_state, &state);
1797 if (ret)
1798 return ret;
1799 kbd_previous_mode_bit = new_state.mode_bit;
1800
1801 return count;
1802 }
1803
1804 static ssize_t kbd_led_als_enabled_show(struct device *dev,
1805 struct device_attribute *attr,
1806 char *buf)
1807 {
1808 struct kbd_state state;
1809 bool enabled = false;
1810 int ret;
1811
1812 ret = kbd_get_state(&state);
1813 if (ret)
1814 return ret;
1815 enabled = kbd_is_als_mode_bit(state.mode_bit);
1816
1817 return sprintf(buf, "%d\n", enabled ? 1 : 0);
1818 }
1819
1820 static DEVICE_ATTR(als_enabled, S_IRUGO | S_IWUSR,
1821 kbd_led_als_enabled_show, kbd_led_als_enabled_store);
1822
1823 static ssize_t kbd_led_als_setting_store(struct device *dev,
1824 struct device_attribute *attr,
1825 const char *buf, size_t count)
1826 {
1827 struct kbd_state state;
1828 struct kbd_state new_state;
1829 u8 setting;
1830 int ret;
1831
1832 ret = kstrtou8(buf, 10, &setting);
1833 if (ret)
1834 return ret;
1835
1836 ret = kbd_get_state(&state);
1837 if (ret)
1838 return ret;
1839
1840 new_state = state;
1841 new_state.als_setting = setting;
1842
1843 ret = kbd_set_state_safe(&new_state, &state);
1844 if (ret)
1845 return ret;
1846
1847 return count;
1848 }
1849
1850 static ssize_t kbd_led_als_setting_show(struct device *dev,
1851 struct device_attribute *attr,
1852 char *buf)
1853 {
1854 struct kbd_state state;
1855 int ret;
1856
1857 ret = kbd_get_state(&state);
1858 if (ret)
1859 return ret;
1860
1861 return sprintf(buf, "%d\n", state.als_setting);
1862 }
1863
1864 static DEVICE_ATTR(als_setting, S_IRUGO | S_IWUSR,
1865 kbd_led_als_setting_show, kbd_led_als_setting_store);
1866
1867 static struct attribute *kbd_led_attrs[] = {
1868 &dev_attr_stop_timeout.attr,
1869 &dev_attr_start_triggers.attr,
1870 NULL,
1871 };
1872
1873 static const struct attribute_group kbd_led_group = {
1874 .attrs = kbd_led_attrs,
1875 };
1876
1877 static struct attribute *kbd_led_als_attrs[] = {
1878 &dev_attr_als_enabled.attr,
1879 &dev_attr_als_setting.attr,
1880 NULL,
1881 };
1882
1883 static const struct attribute_group kbd_led_als_group = {
1884 .attrs = kbd_led_als_attrs,
1885 };
1886
1887 static const struct attribute_group *kbd_led_groups[] = {
1888 &kbd_led_group,
1889 &kbd_led_als_group,
1890 NULL,
1891 };
1892
1893 static enum led_brightness kbd_led_level_get(struct led_classdev *led_cdev)
1894 {
1895 int ret;
1896 u16 num;
1897 struct kbd_state state;
1898
1899 if (kbd_get_max_level()) {
1900 ret = kbd_get_state(&state);
1901 if (ret)
1902 return 0;
1903 ret = kbd_get_level(&state);
1904 if (ret < 0)
1905 return 0;
1906 return ret;
1907 }
1908
1909 if (kbd_get_valid_token_counts()) {
1910 ret = kbd_get_first_active_token_bit();
1911 if (ret < 0)
1912 return 0;
1913 for (num = kbd_token_bits; num != 0 && ret > 0; --ret)
1914 num &= num - 1; /* clear the first bit set */
1915 if (num == 0)
1916 return 0;
1917 return ffs(num) - 1;
1918 }
1919
1920 pr_warn("Keyboard brightness level control not supported\n");
1921 return 0;
1922 }
1923
1924 static void kbd_led_level_set(struct led_classdev *led_cdev,
1925 enum led_brightness value)
1926 {
1927 struct kbd_state state;
1928 struct kbd_state new_state;
1929 u16 num;
1930
1931 if (kbd_get_max_level()) {
1932 if (kbd_get_state(&state))
1933 return;
1934 new_state = state;
1935 if (kbd_set_level(&new_state, value))
1936 return;
1937 kbd_set_state_safe(&new_state, &state);
1938 return;
1939 }
1940
1941 if (kbd_get_valid_token_counts()) {
1942 for (num = kbd_token_bits; num != 0 && value > 0; --value)
1943 num &= num - 1; /* clear the first bit set */
1944 if (num == 0)
1945 return;
1946 kbd_set_token_bit(ffs(num) - 1);
1947 return;
1948 }
1949
1950 pr_warn("Keyboard brightness level control not supported\n");
1951 }
1952
1953 static struct led_classdev kbd_led = {
1954 .name = "dell::kbd_backlight",
1955 .brightness_set = kbd_led_level_set,
1956 .brightness_get = kbd_led_level_get,
1957 .groups = kbd_led_groups,
1958 };
1959
1960 static int __init kbd_led_init(struct device *dev)
1961 {
1962 kbd_init();
1963 if (!kbd_led_present)
1964 return -ENODEV;
1965 if (!kbd_als_supported)
1966 kbd_led_groups[1] = NULL;
1967 kbd_led.max_brightness = kbd_get_max_level();
1968 if (!kbd_led.max_brightness) {
1969 kbd_led.max_brightness = kbd_get_valid_token_counts();
1970 if (kbd_led.max_brightness)
1971 kbd_led.max_brightness--;
1972 }
1973 return led_classdev_register(dev, &kbd_led);
1974 }
1975
1976 static void brightness_set_exit(struct led_classdev *led_cdev,
1977 enum led_brightness value)
1978 {
1979 /* Don't change backlight level on exit */
1980 };
1981
1982 static void kbd_led_exit(void)
1983 {
1984 if (!kbd_led_present)
1985 return;
1986 kbd_led.brightness_set = brightness_set_exit;
1987 led_classdev_unregister(&kbd_led);
1988 }
1989
1990 static int __init dell_init(void)
1991 {
1992 struct calling_interface_buffer *buffer;
1993 struct calling_interface_token *token;
1994 int max_intensity = 0;
1995 int ret;
1996
1997 if (!dmi_check_system(dell_device_table))
1998 return -ENODEV;
1999
2000 quirks = NULL;
2001 /* find if this machine support other functions */
2002 dmi_check_system(dell_quirks);
2003
2004 ret = platform_driver_register(&platform_driver);
2005 if (ret)
2006 goto fail_platform_driver;
2007 platform_device = platform_device_alloc("dell-laptop", -1);
2008 if (!platform_device) {
2009 ret = -ENOMEM;
2010 goto fail_platform_device1;
2011 }
2012 ret = platform_device_add(platform_device);
2013 if (ret)
2014 goto fail_platform_device2;
2015
2016 ret = dell_setup_rfkill();
2017
2018 if (ret) {
2019 pr_warn("Unable to setup rfkill\n");
2020 goto fail_rfkill;
2021 }
2022
2023 if (quirks && quirks->touchpad_led)
2024 touchpad_led_init(&platform_device->dev);
2025
2026 kbd_led_init(&platform_device->dev);
2027
2028 dell_laptop_dir = debugfs_create_dir("dell_laptop", NULL);
2029 if (dell_laptop_dir != NULL)
2030 debugfs_create_file("rfkill", 0444, dell_laptop_dir, NULL,
2031 &dell_debugfs_fops);
2032
2033 if (acpi_video_get_backlight_type() != acpi_backlight_vendor)
2034 return 0;
2035
2036 token = dell_smbios_find_token(BRIGHTNESS_TOKEN);
2037 if (token) {
2038 buffer = dell_smbios_get_buffer();
2039 buffer->input[0] = token->location;
2040 dell_smbios_send_request(0, 2);
2041 if (buffer->output[0] == 0)
2042 max_intensity = buffer->output[3];
2043 dell_smbios_release_buffer();
2044 }
2045
2046 if (max_intensity) {
2047 struct backlight_properties props;
2048 memset(&props, 0, sizeof(struct backlight_properties));
2049 props.type = BACKLIGHT_PLATFORM;
2050 props.max_brightness = max_intensity;
2051 dell_backlight_device = backlight_device_register("dell_backlight",
2052 &platform_device->dev,
2053 NULL,
2054 &dell_ops,
2055 &props);
2056
2057 if (IS_ERR(dell_backlight_device)) {
2058 ret = PTR_ERR(dell_backlight_device);
2059 dell_backlight_device = NULL;
2060 goto fail_backlight;
2061 }
2062
2063 dell_backlight_device->props.brightness =
2064 dell_get_intensity(dell_backlight_device);
2065 backlight_update_status(dell_backlight_device);
2066 }
2067
2068 return 0;
2069
2070 fail_backlight:
2071 dell_cleanup_rfkill();
2072 fail_rfkill:
2073 platform_device_del(platform_device);
2074 fail_platform_device2:
2075 platform_device_put(platform_device);
2076 fail_platform_device1:
2077 platform_driver_unregister(&platform_driver);
2078 fail_platform_driver:
2079 return ret;
2080 }
2081
2082 static void __exit dell_exit(void)
2083 {
2084 debugfs_remove_recursive(dell_laptop_dir);
2085 if (quirks && quirks->touchpad_led)
2086 touchpad_led_exit();
2087 kbd_led_exit();
2088 backlight_device_unregister(dell_backlight_device);
2089 dell_cleanup_rfkill();
2090 if (platform_device) {
2091 platform_device_unregister(platform_device);
2092 platform_driver_unregister(&platform_driver);
2093 }
2094 }
2095
2096 /* dell-rbtn.c driver export functions which will not work correctly (and could
2097 * cause kernel crash) if they are called before dell-rbtn.c init code. This is
2098 * not problem when dell-rbtn.c is compiled as external module. When both files
2099 * (dell-rbtn.c and dell-laptop.c) are compiled statically into kernel, then we
2100 * need to ensure that dell_init() will be called after initializing dell-rbtn.
2101 * This can be achieved by late_initcall() instead module_init().
2102 */
2103 late_initcall(dell_init);
2104 module_exit(dell_exit);
2105
2106 MODULE_AUTHOR("Matthew Garrett <mjg@redhat.com>");
2107 MODULE_AUTHOR("Gabriele Mazzotta <gabriele.mzt@gmail.com>");
2108 MODULE_AUTHOR("Pali Rohár <pali.rohar@gmail.com>");
2109 MODULE_DESCRIPTION("Dell laptop driver");
2110 MODULE_LICENSE("GPL");
Linux with added FPC-III support