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/slab.h>
32 #include <linux/debugfs.h>
33 #include <linux/seq_file.h>
34 #include <acpi/video.h>
35 #include "../../firmware/dcdbas.h"
36 #include "dell-rbtn.h"
37
38 #define BRIGHTNESS_TOKEN 0x7d
39 #define KBD_LED_OFF_TOKEN 0x01E1
40 #define KBD_LED_ON_TOKEN 0x01E2
41 #define KBD_LED_AUTO_TOKEN 0x01E3
42 #define KBD_LED_AUTO_25_TOKEN 0x02EA
43 #define KBD_LED_AUTO_50_TOKEN 0x02EB
44 #define KBD_LED_AUTO_75_TOKEN 0x02EC
45 #define KBD_LED_AUTO_100_TOKEN 0x02F6
46
47 /* This structure will be modified by the firmware when we enter
48 * system management mode, hence the volatiles */
49
50 struct calling_interface_buffer {
51 u16 class;
52 u16 select;
53 volatile u32 input[4];
54 volatile u32 output[4];
55 } __packed;
56
57 struct calling_interface_token {
58 u16 tokenID;
59 u16 location;
60 union {
61 u16 value;
62 u16 stringlength;
63 };
64 };
65
66 struct calling_interface_structure {
67 struct dmi_header header;
68 u16 cmdIOAddress;
69 u8 cmdIOCode;
70 u32 supportedCmds;
71 struct calling_interface_token tokens[];
72 } __packed;
73
74 struct quirk_entry {
75 u8 touchpad_led;
76
77 int needs_kbd_timeouts;
78 /*
79 * Ordered list of timeouts expressed in seconds.
80 * The list must end with -1
81 */
82 int kbd_timeouts[];
83 };
84
85 static struct quirk_entry *quirks;
86
87 static struct quirk_entry quirk_dell_vostro_v130 = {
88 .touchpad_led = 1,
89 };
90
dmi_matched(const struct dmi_system_id * dmi)91 static int __init dmi_matched(const struct dmi_system_id *dmi)
92 {
93 quirks = dmi->driver_data;
94 return 1;
95 }
96
97 /*
98 * These values come from Windows utility provided by Dell. If any other value
99 * is used then BIOS silently set timeout to 0 without any error message.
100 */
101 static struct quirk_entry quirk_dell_xps13_9333 = {
102 .needs_kbd_timeouts = 1,
103 .kbd_timeouts = { 0, 5, 15, 60, 5 * 60, 15 * 60, -1 },
104 };
105
106 static int da_command_address;
107 static int da_command_code;
108 static int da_num_tokens;
109 static struct calling_interface_token *da_tokens;
110
111 static struct platform_driver platform_driver = {
112 .driver = {
113 .name = "dell-laptop",
114 }
115 };
116
117 static struct platform_device *platform_device;
118 static struct backlight_device *dell_backlight_device;
119 static struct rfkill *wifi_rfkill;
120 static struct rfkill *bluetooth_rfkill;
121 static struct rfkill *wwan_rfkill;
122 static bool force_rfkill;
123
124 module_param(force_rfkill, bool, 0444);
125 MODULE_PARM_DESC(force_rfkill, "enable rfkill on non whitelisted models");
126
127 static const struct dmi_system_id dell_device_table[] __initconst = {
128 {
129 .ident = "Dell laptop",
130 .matches = {
131 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
132 DMI_MATCH(DMI_CHASSIS_TYPE, "8"),
133 },
134 },
135 {
136 .matches = {
137 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
138 DMI_MATCH(DMI_CHASSIS_TYPE, "9"), /*Laptop*/
139 },
140 },
141 {
142 .ident = "Dell Computer Corporation",
143 .matches = {
144 DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer Corporation"),
145 DMI_MATCH(DMI_CHASSIS_TYPE, "8"),
146 },
147 },
148 { }
149 };
150 MODULE_DEVICE_TABLE(dmi, dell_device_table);
151
152 static const struct dmi_system_id dell_quirks[] __initconst = {
153 {
154 .callback = dmi_matched,
155 .ident = "Dell Vostro V130",
156 .matches = {
157 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
158 DMI_MATCH(DMI_PRODUCT_NAME, "Vostro V130"),
159 },
160 .driver_data = &quirk_dell_vostro_v130,
161 },
162 {
163 .callback = dmi_matched,
164 .ident = "Dell Vostro V131",
165 .matches = {
166 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
167 DMI_MATCH(DMI_PRODUCT_NAME, "Vostro V131"),
168 },
169 .driver_data = &quirk_dell_vostro_v130,
170 },
171 {
172 .callback = dmi_matched,
173 .ident = "Dell Vostro 3350",
174 .matches = {
175 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
176 DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 3350"),
177 },
178 .driver_data = &quirk_dell_vostro_v130,
179 },
180 {
181 .callback = dmi_matched,
182 .ident = "Dell Vostro 3555",
183 .matches = {
184 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
185 DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 3555"),
186 },
187 .driver_data = &quirk_dell_vostro_v130,
188 },
189 {
190 .callback = dmi_matched,
191 .ident = "Dell Inspiron N311z",
192 .matches = {
193 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
194 DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron N311z"),
195 },
196 .driver_data = &quirk_dell_vostro_v130,
197 },
198 {
199 .callback = dmi_matched,
200 .ident = "Dell Inspiron M5110",
201 .matches = {
202 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
203 DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron M5110"),
204 },
205 .driver_data = &quirk_dell_vostro_v130,
206 },
207 {
208 .callback = dmi_matched,
209 .ident = "Dell Vostro 3360",
210 .matches = {
211 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
212 DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 3360"),
213 },
214 .driver_data = &quirk_dell_vostro_v130,
215 },
216 {
217 .callback = dmi_matched,
218 .ident = "Dell Vostro 3460",
219 .matches = {
220 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
221 DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 3460"),
222 },
223 .driver_data = &quirk_dell_vostro_v130,
224 },
225 {
226 .callback = dmi_matched,
227 .ident = "Dell Vostro 3560",
228 .matches = {
229 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
230 DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 3560"),
231 },
232 .driver_data = &quirk_dell_vostro_v130,
233 },
234 {
235 .callback = dmi_matched,
236 .ident = "Dell Vostro 3450",
237 .matches = {
238 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
239 DMI_MATCH(DMI_PRODUCT_NAME, "Dell System Vostro 3450"),
240 },
241 .driver_data = &quirk_dell_vostro_v130,
242 },
243 {
244 .callback = dmi_matched,
245 .ident = "Dell Inspiron 5420",
246 .matches = {
247 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
248 DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 5420"),
249 },
250 .driver_data = &quirk_dell_vostro_v130,
251 },
252 {
253 .callback = dmi_matched,
254 .ident = "Dell Inspiron 5520",
255 .matches = {
256 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
257 DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 5520"),
258 },
259 .driver_data = &quirk_dell_vostro_v130,
260 },
261 {
262 .callback = dmi_matched,
263 .ident = "Dell Inspiron 5720",
264 .matches = {
265 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
266 DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 5720"),
267 },
268 .driver_data = &quirk_dell_vostro_v130,
269 },
270 {
271 .callback = dmi_matched,
272 .ident = "Dell Inspiron 7420",
273 .matches = {
274 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
275 DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 7420"),
276 },
277 .driver_data = &quirk_dell_vostro_v130,
278 },
279 {
280 .callback = dmi_matched,
281 .ident = "Dell Inspiron 7520",
282 .matches = {
283 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
284 DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 7520"),
285 },
286 .driver_data = &quirk_dell_vostro_v130,
287 },
288 {
289 .callback = dmi_matched,
290 .ident = "Dell Inspiron 7720",
291 .matches = {
292 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
293 DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 7720"),
294 },
295 .driver_data = &quirk_dell_vostro_v130,
296 },
297 {
298 .callback = dmi_matched,
299 .ident = "Dell XPS13 9333",
300 .matches = {
301 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
302 DMI_MATCH(DMI_PRODUCT_NAME, "XPS13 9333"),
303 },
304 .driver_data = &quirk_dell_xps13_9333,
305 },
306 { }
307 };
308
309 static struct calling_interface_buffer *buffer;
310 static DEFINE_MUTEX(buffer_mutex);
311
clear_buffer(void)312 static void clear_buffer(void)
313 {
314 memset(buffer, 0, sizeof(struct calling_interface_buffer));
315 }
316
get_buffer(void)317 static void get_buffer(void)
318 {
319 mutex_lock(&buffer_mutex);
320 clear_buffer();
321 }
322
release_buffer(void)323 static void release_buffer(void)
324 {
325 mutex_unlock(&buffer_mutex);
326 }
327
parse_da_table(const struct dmi_header * dm)328 static void __init parse_da_table(const struct dmi_header *dm)
329 {
330 /* Final token is a terminator, so we don't want to copy it */
331 int tokens = (dm->length-11)/sizeof(struct calling_interface_token)-1;
332 struct calling_interface_token *new_da_tokens;
333 struct calling_interface_structure *table =
334 container_of(dm, struct calling_interface_structure, header);
335
336 /* 4 bytes of table header, plus 7 bytes of Dell header, plus at least
337 6 bytes of entry */
338
339 if (dm->length < 17)
340 return;
341
342 da_command_address = table->cmdIOAddress;
343 da_command_code = table->cmdIOCode;
344
345 new_da_tokens = krealloc(da_tokens, (da_num_tokens + tokens) *
346 sizeof(struct calling_interface_token),
347 GFP_KERNEL);
348
349 if (!new_da_tokens)
350 return;
351 da_tokens = new_da_tokens;
352
353 memcpy(da_tokens+da_num_tokens, table->tokens,
354 sizeof(struct calling_interface_token) * tokens);
355
356 da_num_tokens += tokens;
357 }
358
find_tokens(const struct dmi_header * dm,void * dummy)359 static void __init find_tokens(const struct dmi_header *dm, void *dummy)
360 {
361 switch (dm->type) {
362 case 0xd4: /* Indexed IO */
363 case 0xd5: /* Protected Area Type 1 */
364 case 0xd6: /* Protected Area Type 2 */
365 break;
366 case 0xda: /* Calling interface */
367 parse_da_table(dm);
368 break;
369 }
370 }
371
find_token_id(int tokenid)372 static int find_token_id(int tokenid)
373 {
374 int i;
375
376 for (i = 0; i < da_num_tokens; i++) {
377 if (da_tokens[i].tokenID == tokenid)
378 return i;
379 }
380
381 return -1;
382 }
383
find_token_location(int tokenid)384 static int find_token_location(int tokenid)
385 {
386 int id;
387
388 id = find_token_id(tokenid);
389 if (id == -1)
390 return -1;
391
392 return da_tokens[id].location;
393 }
394
395 static struct calling_interface_buffer *
dell_send_request(struct calling_interface_buffer * buffer,int class,int select)396 dell_send_request(struct calling_interface_buffer *buffer, int class,
397 int select)
398 {
399 struct smi_cmd command;
400
401 command.magic = SMI_CMD_MAGIC;
402 command.command_address = da_command_address;
403 command.command_code = da_command_code;
404 command.ebx = virt_to_phys(buffer);
405 command.ecx = 0x42534931;
406
407 buffer->class = class;
408 buffer->select = select;
409
410 dcdbas_smi_request(&command);
411
412 return buffer;
413 }
414
dell_smi_error(int value)415 static inline int dell_smi_error(int value)
416 {
417 switch (value) {
418 case 0: /* Completed successfully */
419 return 0;
420 case -1: /* Completed with error */
421 return -EIO;
422 case -2: /* Function not supported */
423 return -ENXIO;
424 default: /* Unknown error */
425 return -EINVAL;
426 }
427 }
428
429 /*
430 * Derived from information in smbios-wireless-ctl:
431 *
432 * cbSelect 17, Value 11
433 *
434 * Return Wireless Info
435 * cbArg1, byte0 = 0x00
436 *
437 * cbRes1 Standard return codes (0, -1, -2)
438 * cbRes2 Info bit flags:
439 *
440 * 0 Hardware switch supported (1)
441 * 1 WiFi locator supported (1)
442 * 2 WLAN supported (1)
443 * 3 Bluetooth (BT) supported (1)
444 * 4 WWAN supported (1)
445 * 5 Wireless KBD supported (1)
446 * 6 Uw b supported (1)
447 * 7 WiGig supported (1)
448 * 8 WLAN installed (1)
449 * 9 BT installed (1)
450 * 10 WWAN installed (1)
451 * 11 Uw b installed (1)
452 * 12 WiGig installed (1)
453 * 13-15 Reserved (0)
454 * 16 Hardware (HW) switch is On (1)
455 * 17 WLAN disabled (1)
456 * 18 BT disabled (1)
457 * 19 WWAN disabled (1)
458 * 20 Uw b disabled (1)
459 * 21 WiGig disabled (1)
460 * 20-31 Reserved (0)
461 *
462 * cbRes3 NVRAM size in bytes
463 * cbRes4, byte 0 NVRAM format version number
464 *
465 *
466 * Set QuickSet Radio Disable Flag
467 * cbArg1, byte0 = 0x01
468 * cbArg1, byte1
469 * Radio ID value:
470 * 0 Radio Status
471 * 1 WLAN ID
472 * 2 BT ID
473 * 3 WWAN ID
474 * 4 UWB ID
475 * 5 WIGIG ID
476 * cbArg1, byte2 Flag bits:
477 * 0 QuickSet disables radio (1)
478 * 1-7 Reserved (0)
479 *
480 * cbRes1 Standard return codes (0, -1, -2)
481 * cbRes2 QuickSet (QS) radio disable bit map:
482 * 0 QS disables WLAN
483 * 1 QS disables BT
484 * 2 QS disables WWAN
485 * 3 QS disables UWB
486 * 4 QS disables WIGIG
487 * 5-31 Reserved (0)
488 *
489 * Wireless Switch Configuration
490 * cbArg1, byte0 = 0x02
491 *
492 * cbArg1, byte1
493 * Subcommand:
494 * 0 Get config
495 * 1 Set config
496 * 2 Set WiFi locator enable/disable
497 * cbArg1,byte2
498 * Switch settings (if byte 1==1):
499 * 0 WLAN sw itch control (1)
500 * 1 BT sw itch control (1)
501 * 2 WWAN sw itch control (1)
502 * 3 UWB sw itch control (1)
503 * 4 WiGig sw itch control (1)
504 * 5-7 Reserved (0)
505 * cbArg1, byte2 Enable bits (if byte 1==2):
506 * 0 Enable WiFi locator (1)
507 *
508 * cbRes1 Standard return codes (0, -1, -2)
509 * cbRes2 QuickSet radio disable bit map:
510 * 0 WLAN controlled by sw itch (1)
511 * 1 BT controlled by sw itch (1)
512 * 2 WWAN controlled by sw itch (1)
513 * 3 UWB controlled by sw itch (1)
514 * 4 WiGig controlled by sw itch (1)
515 * 5-6 Reserved (0)
516 * 7 Wireless sw itch config locked (1)
517 * 8 WiFi locator enabled (1)
518 * 9-14 Reserved (0)
519 * 15 WiFi locator setting locked (1)
520 * 16-31 Reserved (0)
521 *
522 * Read Local Config Data (LCD)
523 * cbArg1, byte0 = 0x10
524 * cbArg1, byte1 NVRAM index low byte
525 * cbArg1, byte2 NVRAM index high byte
526 * cbRes1 Standard return codes (0, -1, -2)
527 * cbRes2 4 bytes read from LCD[index]
528 * cbRes3 4 bytes read from LCD[index+4]
529 * cbRes4 4 bytes read from LCD[index+8]
530 *
531 * Write Local Config Data (LCD)
532 * cbArg1, byte0 = 0x11
533 * cbArg1, byte1 NVRAM index low byte
534 * cbArg1, byte2 NVRAM index high byte
535 * cbArg2 4 bytes to w rite at LCD[index]
536 * cbArg3 4 bytes to w rite at LCD[index+4]
537 * cbArg4 4 bytes to w rite at LCD[index+8]
538 * cbRes1 Standard return codes (0, -1, -2)
539 *
540 * Populate Local Config Data from NVRAM
541 * cbArg1, byte0 = 0x12
542 * cbRes1 Standard return codes (0, -1, -2)
543 *
544 * Commit Local Config Data to NVRAM
545 * cbArg1, byte0 = 0x13
546 * cbRes1 Standard return codes (0, -1, -2)
547 */
548
dell_rfkill_set(void * data,bool blocked)549 static int dell_rfkill_set(void *data, bool blocked)
550 {
551 int disable = blocked ? 1 : 0;
552 unsigned long radio = (unsigned long)data;
553 int hwswitch_bit = (unsigned long)data - 1;
554 int hwswitch;
555 int status;
556 int ret;
557
558 get_buffer();
559
560 dell_send_request(buffer, 17, 11);
561 ret = buffer->output[0];
562 status = buffer->output[1];
563
564 if (ret != 0)
565 goto out;
566
567 clear_buffer();
568
569 buffer->input[0] = 0x2;
570 dell_send_request(buffer, 17, 11);
571 ret = buffer->output[0];
572 hwswitch = buffer->output[1];
573
574 /* If the hardware switch controls this radio, and the hardware
575 switch is disabled, always disable the radio */
576 if (ret == 0 && (hwswitch & BIT(hwswitch_bit)) &&
577 (status & BIT(0)) && !(status & BIT(16)))
578 disable = 1;
579
580 clear_buffer();
581
582 buffer->input[0] = (1 | (radio<<8) | (disable << 16));
583 dell_send_request(buffer, 17, 11);
584 ret = buffer->output[0];
585
586 out:
587 release_buffer();
588 return dell_smi_error(ret);
589 }
590
591 /* Must be called with the buffer held */
dell_rfkill_update_sw_state(struct rfkill * rfkill,int radio,int status)592 static void dell_rfkill_update_sw_state(struct rfkill *rfkill, int radio,
593 int status)
594 {
595 if (status & BIT(0)) {
596 /* Has hw-switch, sync sw_state to BIOS */
597 int block = rfkill_blocked(rfkill);
598 clear_buffer();
599 buffer->input[0] = (1 | (radio << 8) | (block << 16));
600 dell_send_request(buffer, 17, 11);
601 } else {
602 /* No hw-switch, sync BIOS state to sw_state */
603 rfkill_set_sw_state(rfkill, !!(status & BIT(radio + 16)));
604 }
605 }
606
dell_rfkill_update_hw_state(struct rfkill * rfkill,int radio,int status,int hwswitch)607 static void dell_rfkill_update_hw_state(struct rfkill *rfkill, int radio,
608 int status, int hwswitch)
609 {
610 if (hwswitch & (BIT(radio - 1)))
611 rfkill_set_hw_state(rfkill, !(status & BIT(16)));
612 }
613
dell_rfkill_query(struct rfkill * rfkill,void * data)614 static void dell_rfkill_query(struct rfkill *rfkill, void *data)
615 {
616 int radio = ((unsigned long)data & 0xF);
617 int hwswitch;
618 int status;
619 int ret;
620
621 get_buffer();
622
623 dell_send_request(buffer, 17, 11);
624 ret = buffer->output[0];
625 status = buffer->output[1];
626
627 if (ret != 0 || !(status & BIT(0))) {
628 release_buffer();
629 return;
630 }
631
632 clear_buffer();
633
634 buffer->input[0] = 0x2;
635 dell_send_request(buffer, 17, 11);
636 ret = buffer->output[0];
637 hwswitch = buffer->output[1];
638
639 release_buffer();
640
641 if (ret != 0)
642 return;
643
644 dell_rfkill_update_hw_state(rfkill, radio, status, hwswitch);
645 }
646
647 static const struct rfkill_ops dell_rfkill_ops = {
648 .set_block = dell_rfkill_set,
649 .query = dell_rfkill_query,
650 };
651
652 static struct dentry *dell_laptop_dir;
653
dell_debugfs_show(struct seq_file * s,void * data)654 static int dell_debugfs_show(struct seq_file *s, void *data)
655 {
656 int hwswitch_state;
657 int hwswitch_ret;
658 int status;
659 int ret;
660
661 get_buffer();
662
663 dell_send_request(buffer, 17, 11);
664 ret = buffer->output[0];
665 status = buffer->output[1];
666
667 clear_buffer();
668
669 buffer->input[0] = 0x2;
670 dell_send_request(buffer, 17, 11);
671 hwswitch_ret = buffer->output[0];
672 hwswitch_state = buffer->output[1];
673
674 release_buffer();
675
676 seq_printf(s, "return:\t%d\n", ret);
677 seq_printf(s, "status:\t0x%X\n", status);
678 seq_printf(s, "Bit 0 : Hardware switch supported: %lu\n",
679 status & BIT(0));
680 seq_printf(s, "Bit 1 : Wifi locator supported: %lu\n",
681 (status & BIT(1)) >> 1);
682 seq_printf(s, "Bit 2 : Wifi is supported: %lu\n",
683 (status & BIT(2)) >> 2);
684 seq_printf(s, "Bit 3 : Bluetooth is supported: %lu\n",
685 (status & BIT(3)) >> 3);
686 seq_printf(s, "Bit 4 : WWAN is supported: %lu\n",
687 (status & BIT(4)) >> 4);
688 seq_printf(s, "Bit 5 : Wireless keyboard supported: %lu\n",
689 (status & BIT(5)) >> 5);
690 seq_printf(s, "Bit 6 : UWB supported: %lu\n",
691 (status & BIT(6)) >> 6);
692 seq_printf(s, "Bit 7 : WiGig supported: %lu\n",
693 (status & BIT(7)) >> 7);
694 seq_printf(s, "Bit 8 : Wifi is installed: %lu\n",
695 (status & BIT(8)) >> 8);
696 seq_printf(s, "Bit 9 : Bluetooth is installed: %lu\n",
697 (status & BIT(9)) >> 9);
698 seq_printf(s, "Bit 10: WWAN is installed: %lu\n",
699 (status & BIT(10)) >> 10);
700 seq_printf(s, "Bit 11: UWB installed: %lu\n",
701 (status & BIT(11)) >> 11);
702 seq_printf(s, "Bit 12: WiGig installed: %lu\n",
703 (status & BIT(12)) >> 12);
704
705 seq_printf(s, "Bit 16: Hardware switch is on: %lu\n",
706 (status & BIT(16)) >> 16);
707 seq_printf(s, "Bit 17: Wifi is blocked: %lu\n",
708 (status & BIT(17)) >> 17);
709 seq_printf(s, "Bit 18: Bluetooth is blocked: %lu\n",
710 (status & BIT(18)) >> 18);
711 seq_printf(s, "Bit 19: WWAN is blocked: %lu\n",
712 (status & BIT(19)) >> 19);
713 seq_printf(s, "Bit 20: UWB is blocked: %lu\n",
714 (status & BIT(20)) >> 20);
715 seq_printf(s, "Bit 21: WiGig is blocked: %lu\n",
716 (status & BIT(21)) >> 21);
717
718 seq_printf(s, "\nhwswitch_return:\t%d\n", hwswitch_ret);
719 seq_printf(s, "hwswitch_state:\t0x%X\n", hwswitch_state);
720 seq_printf(s, "Bit 0 : Wifi controlled by switch: %lu\n",
721 hwswitch_state & BIT(0));
722 seq_printf(s, "Bit 1 : Bluetooth controlled by switch: %lu\n",
723 (hwswitch_state & BIT(1)) >> 1);
724 seq_printf(s, "Bit 2 : WWAN controlled by switch: %lu\n",
725 (hwswitch_state & BIT(2)) >> 2);
726 seq_printf(s, "Bit 3 : UWB controlled by switch: %lu\n",
727 (hwswitch_state & BIT(3)) >> 3);
728 seq_printf(s, "Bit 4 : WiGig controlled by switch: %lu\n",
729 (hwswitch_state & BIT(4)) >> 4);
730 seq_printf(s, "Bit 7 : Wireless switch config locked: %lu\n",
731 (hwswitch_state & BIT(7)) >> 7);
732 seq_printf(s, "Bit 8 : Wifi locator enabled: %lu\n",
733 (hwswitch_state & BIT(8)) >> 8);
734 seq_printf(s, "Bit 15: Wifi locator setting locked: %lu\n",
735 (hwswitch_state & BIT(15)) >> 15);
736
737 return 0;
738 }
739
dell_debugfs_open(struct inode * inode,struct file * file)740 static int dell_debugfs_open(struct inode *inode, struct file *file)
741 {
742 return single_open(file, dell_debugfs_show, inode->i_private);
743 }
744
745 static const struct file_operations dell_debugfs_fops = {
746 .owner = THIS_MODULE,
747 .open = dell_debugfs_open,
748 .read = seq_read,
749 .llseek = seq_lseek,
750 .release = single_release,
751 };
752
dell_update_rfkill(struct work_struct * ignored)753 static void dell_update_rfkill(struct work_struct *ignored)
754 {
755 int hwswitch = 0;
756 int status;
757 int ret;
758
759 get_buffer();
760
761 dell_send_request(buffer, 17, 11);
762 ret = buffer->output[0];
763 status = buffer->output[1];
764
765 if (ret != 0)
766 goto out;
767
768 clear_buffer();
769
770 buffer->input[0] = 0x2;
771 dell_send_request(buffer, 17, 11);
772 ret = buffer->output[0];
773
774 if (ret == 0 && (status & BIT(0)))
775 hwswitch = buffer->output[1];
776
777 if (wifi_rfkill) {
778 dell_rfkill_update_hw_state(wifi_rfkill, 1, status, hwswitch);
779 dell_rfkill_update_sw_state(wifi_rfkill, 1, status);
780 }
781 if (bluetooth_rfkill) {
782 dell_rfkill_update_hw_state(bluetooth_rfkill, 2, status,
783 hwswitch);
784 dell_rfkill_update_sw_state(bluetooth_rfkill, 2, status);
785 }
786 if (wwan_rfkill) {
787 dell_rfkill_update_hw_state(wwan_rfkill, 3, status, hwswitch);
788 dell_rfkill_update_sw_state(wwan_rfkill, 3, status);
789 }
790
791 out:
792 release_buffer();
793 }
794 static DECLARE_DELAYED_WORK(dell_rfkill_work, dell_update_rfkill);
795
dell_laptop_i8042_filter(unsigned char data,unsigned char str,struct serio * port)796 static bool dell_laptop_i8042_filter(unsigned char data, unsigned char str,
797 struct serio *port)
798 {
799 static bool extended;
800
801 if (str & I8042_STR_AUXDATA)
802 return false;
803
804 if (unlikely(data == 0xe0)) {
805 extended = true;
806 return false;
807 } else if (unlikely(extended)) {
808 switch (data) {
809 case 0x8:
810 schedule_delayed_work(&dell_rfkill_work,
811 round_jiffies_relative(HZ / 4));
812 break;
813 }
814 extended = false;
815 }
816
817 return false;
818 }
819
820 static int (*dell_rbtn_notifier_register_func)(struct notifier_block *);
821 static int (*dell_rbtn_notifier_unregister_func)(struct notifier_block *);
822
dell_laptop_rbtn_notifier_call(struct notifier_block * nb,unsigned long action,void * data)823 static int dell_laptop_rbtn_notifier_call(struct notifier_block *nb,
824 unsigned long action, void *data)
825 {
826 schedule_delayed_work(&dell_rfkill_work, 0);
827 return NOTIFY_OK;
828 }
829
830 static struct notifier_block dell_laptop_rbtn_notifier = {
831 .notifier_call = dell_laptop_rbtn_notifier_call,
832 };
833
dell_setup_rfkill(void)834 static int __init dell_setup_rfkill(void)
835 {
836 int status, ret, whitelisted;
837 const char *product;
838
839 /*
840 * rfkill support causes trouble on various models, mostly Inspirons.
841 * So we whitelist certain series, and don't support rfkill on others.
842 */
843 whitelisted = 0;
844 product = dmi_get_system_info(DMI_PRODUCT_NAME);
845 if (product && (strncmp(product, "Latitude", 8) == 0 ||
846 strncmp(product, "Precision", 9) == 0))
847 whitelisted = 1;
848 if (!force_rfkill && !whitelisted)
849 return 0;
850
851 get_buffer();
852 dell_send_request(buffer, 17, 11);
853 ret = buffer->output[0];
854 status = buffer->output[1];
855 release_buffer();
856
857 /* dell wireless info smbios call is not supported */
858 if (ret != 0)
859 return 0;
860
861 /* rfkill is only tested on laptops with a hwswitch */
862 if (!(status & BIT(0)) && !force_rfkill)
863 return 0;
864
865 if ((status & (1<<2|1<<8)) == (1<<2|1<<8)) {
866 wifi_rfkill = rfkill_alloc("dell-wifi", &platform_device->dev,
867 RFKILL_TYPE_WLAN,
868 &dell_rfkill_ops, (void *) 1);
869 if (!wifi_rfkill) {
870 ret = -ENOMEM;
871 goto err_wifi;
872 }
873 ret = rfkill_register(wifi_rfkill);
874 if (ret)
875 goto err_wifi;
876 }
877
878 if ((status & (1<<3|1<<9)) == (1<<3|1<<9)) {
879 bluetooth_rfkill = rfkill_alloc("dell-bluetooth",
880 &platform_device->dev,
881 RFKILL_TYPE_BLUETOOTH,
882 &dell_rfkill_ops, (void *) 2);
883 if (!bluetooth_rfkill) {
884 ret = -ENOMEM;
885 goto err_bluetooth;
886 }
887 ret = rfkill_register(bluetooth_rfkill);
888 if (ret)
889 goto err_bluetooth;
890 }
891
892 if ((status & (1<<4|1<<10)) == (1<<4|1<<10)) {
893 wwan_rfkill = rfkill_alloc("dell-wwan",
894 &platform_device->dev,
895 RFKILL_TYPE_WWAN,
896 &dell_rfkill_ops, (void *) 3);
897 if (!wwan_rfkill) {
898 ret = -ENOMEM;
899 goto err_wwan;
900 }
901 ret = rfkill_register(wwan_rfkill);
902 if (ret)
903 goto err_wwan;
904 }
905
906 /*
907 * Dell Airplane Mode Switch driver (dell-rbtn) supports ACPI devices
908 * which can receive events from HW slider switch.
909 *
910 * Dell SMBIOS on whitelisted models supports controlling radio devices
911 * but does not support receiving HW button switch events. We can use
912 * i8042 filter hook function to receive keyboard data and handle
913 * keycode for HW button.
914 *
915 * So if it is possible we will use Dell Airplane Mode Switch ACPI
916 * driver for receiving HW events and Dell SMBIOS for setting rfkill
917 * states. If ACPI driver or device is not available we will fallback to
918 * i8042 filter hook function.
919 *
920 * To prevent duplicate rfkill devices which control and do same thing,
921 * dell-rbtn driver will automatically remove its own rfkill devices
922 * once function dell_rbtn_notifier_register() is called.
923 */
924
925 dell_rbtn_notifier_register_func =
926 symbol_request(dell_rbtn_notifier_register);
927 if (dell_rbtn_notifier_register_func) {
928 dell_rbtn_notifier_unregister_func =
929 symbol_request(dell_rbtn_notifier_unregister);
930 if (!dell_rbtn_notifier_unregister_func) {
931 symbol_put(dell_rbtn_notifier_register);
932 dell_rbtn_notifier_register_func = NULL;
933 }
934 }
935
936 if (dell_rbtn_notifier_register_func) {
937 ret = dell_rbtn_notifier_register_func(
938 &dell_laptop_rbtn_notifier);
939 symbol_put(dell_rbtn_notifier_register);
940 dell_rbtn_notifier_register_func = NULL;
941 if (ret != 0) {
942 symbol_put(dell_rbtn_notifier_unregister);
943 dell_rbtn_notifier_unregister_func = NULL;
944 }
945 } else {
946 pr_info("Symbols from dell-rbtn acpi driver are not available\n");
947 ret = -ENODEV;
948 }
949
950 if (ret == 0) {
951 pr_info("Using dell-rbtn acpi driver for receiving events\n");
952 } else if (ret != -ENODEV) {
953 pr_warn("Unable to register dell rbtn notifier\n");
954 goto err_filter;
955 } else {
956 ret = i8042_install_filter(dell_laptop_i8042_filter);
957 if (ret) {
958 pr_warn("Unable to install key filter\n");
959 goto err_filter;
960 }
961 pr_info("Using i8042 filter function for receiving events\n");
962 }
963
964 return 0;
965 err_filter:
966 if (wwan_rfkill)
967 rfkill_unregister(wwan_rfkill);
968 err_wwan:
969 rfkill_destroy(wwan_rfkill);
970 if (bluetooth_rfkill)
971 rfkill_unregister(bluetooth_rfkill);
972 err_bluetooth:
973 rfkill_destroy(bluetooth_rfkill);
974 if (wifi_rfkill)
975 rfkill_unregister(wifi_rfkill);
976 err_wifi:
977 rfkill_destroy(wifi_rfkill);
978
979 return ret;
980 }
981
dell_cleanup_rfkill(void)982 static void dell_cleanup_rfkill(void)
983 {
984 if (dell_rbtn_notifier_unregister_func) {
985 dell_rbtn_notifier_unregister_func(&dell_laptop_rbtn_notifier);
986 symbol_put(dell_rbtn_notifier_unregister);
987 dell_rbtn_notifier_unregister_func = NULL;
988 } else {
989 i8042_remove_filter(dell_laptop_i8042_filter);
990 }
991 cancel_delayed_work_sync(&dell_rfkill_work);
992 if (wifi_rfkill) {
993 rfkill_unregister(wifi_rfkill);
994 rfkill_destroy(wifi_rfkill);
995 }
996 if (bluetooth_rfkill) {
997 rfkill_unregister(bluetooth_rfkill);
998 rfkill_destroy(bluetooth_rfkill);
999 }
1000 if (wwan_rfkill) {
1001 rfkill_unregister(wwan_rfkill);
1002 rfkill_destroy(wwan_rfkill);
1003 }
1004 }
1005
dell_send_intensity(struct backlight_device * bd)1006 static int dell_send_intensity(struct backlight_device *bd)
1007 {
1008 int token;
1009 int ret;
1010
1011 token = find_token_location(BRIGHTNESS_TOKEN);
1012 if (token == -1)
1013 return -ENODEV;
1014
1015 get_buffer();
1016 buffer->input[0] = token;
1017 buffer->input[1] = bd->props.brightness;
1018
1019 if (power_supply_is_system_supplied() > 0)
1020 dell_send_request(buffer, 1, 2);
1021 else
1022 dell_send_request(buffer, 1, 1);
1023
1024 ret = dell_smi_error(buffer->output[0]);
1025
1026 release_buffer();
1027 return ret;
1028 }
1029
dell_get_intensity(struct backlight_device * bd)1030 static int dell_get_intensity(struct backlight_device *bd)
1031 {
1032 int token;
1033 int ret;
1034
1035 token = find_token_location(BRIGHTNESS_TOKEN);
1036 if (token == -1)
1037 return -ENODEV;
1038
1039 get_buffer();
1040 buffer->input[0] = token;
1041
1042 if (power_supply_is_system_supplied() > 0)
1043 dell_send_request(buffer, 0, 2);
1044 else
1045 dell_send_request(buffer, 0, 1);
1046
1047 if (buffer->output[0])
1048 ret = dell_smi_error(buffer->output[0]);
1049 else
1050 ret = buffer->output[1];
1051
1052 release_buffer();
1053 return ret;
1054 }
1055
1056 static const struct backlight_ops dell_ops = {
1057 .get_brightness = dell_get_intensity,
1058 .update_status = dell_send_intensity,
1059 };
1060
touchpad_led_on(void)1061 static void touchpad_led_on(void)
1062 {
1063 int command = 0x97;
1064 char data = 1;
1065 i8042_command(&data, command | 1 << 12);
1066 }
1067
touchpad_led_off(void)1068 static void touchpad_led_off(void)
1069 {
1070 int command = 0x97;
1071 char data = 2;
1072 i8042_command(&data, command | 1 << 12);
1073 }
1074
touchpad_led_set(struct led_classdev * led_cdev,enum led_brightness value)1075 static void touchpad_led_set(struct led_classdev *led_cdev,
1076 enum led_brightness value)
1077 {
1078 if (value > 0)
1079 touchpad_led_on();
1080 else
1081 touchpad_led_off();
1082 }
1083
1084 static struct led_classdev touchpad_led = {
1085 .name = "dell-laptop::touchpad",
1086 .brightness_set = touchpad_led_set,
1087 .flags = LED_CORE_SUSPENDRESUME,
1088 };
1089
touchpad_led_init(struct device * dev)1090 static int __init touchpad_led_init(struct device *dev)
1091 {
1092 return led_classdev_register(dev, &touchpad_led);
1093 }
1094
touchpad_led_exit(void)1095 static void touchpad_led_exit(void)
1096 {
1097 led_classdev_unregister(&touchpad_led);
1098 }
1099
1100 /*
1101 * Derived from information in smbios-keyboard-ctl:
1102 *
1103 * cbClass 4
1104 * cbSelect 11
1105 * Keyboard illumination
1106 * cbArg1 determines the function to be performed
1107 *
1108 * cbArg1 0x0 = Get Feature Information
1109 * cbRES1 Standard return codes (0, -1, -2)
1110 * cbRES2, word0 Bitmap of user-selectable modes
1111 * bit 0 Always off (All systems)
1112 * bit 1 Always on (Travis ATG, Siberia)
1113 * bit 2 Auto: ALS-based On; ALS-based Off (Travis ATG)
1114 * bit 3 Auto: ALS- and input-activity-based On; input-activity based Off
1115 * bit 4 Auto: Input-activity-based On; input-activity based Off
1116 * bit 5 Auto: Input-activity-based On (illumination level 25%); input-activity based Off
1117 * bit 6 Auto: Input-activity-based On (illumination level 50%); input-activity based Off
1118 * bit 7 Auto: Input-activity-based On (illumination level 75%); input-activity based Off
1119 * bit 8 Auto: Input-activity-based On (illumination level 100%); input-activity based Off
1120 * bits 9-15 Reserved for future use
1121 * cbRES2, byte2 Reserved for future use
1122 * cbRES2, byte3 Keyboard illumination type
1123 * 0 Reserved
1124 * 1 Tasklight
1125 * 2 Backlight
1126 * 3-255 Reserved for future use
1127 * cbRES3, byte0 Supported auto keyboard illumination trigger bitmap.
1128 * bit 0 Any keystroke
1129 * bit 1 Touchpad activity
1130 * bit 2 Pointing stick
1131 * bit 3 Any mouse
1132 * bits 4-7 Reserved for future use
1133 * cbRES3, byte1 Supported timeout unit bitmap
1134 * bit 0 Seconds
1135 * bit 1 Minutes
1136 * bit 2 Hours
1137 * bit 3 Days
1138 * bits 4-7 Reserved for future use
1139 * cbRES3, byte2 Number of keyboard light brightness levels
1140 * cbRES4, byte0 Maximum acceptable seconds value (0 if seconds not supported).
1141 * cbRES4, byte1 Maximum acceptable minutes value (0 if minutes not supported).
1142 * cbRES4, byte2 Maximum acceptable hours value (0 if hours not supported).
1143 * cbRES4, byte3 Maximum acceptable days value (0 if days not supported)
1144 *
1145 * cbArg1 0x1 = Get Current State
1146 * cbRES1 Standard return codes (0, -1, -2)
1147 * cbRES2, word0 Bitmap of current mode state
1148 * bit 0 Always off (All systems)
1149 * bit 1 Always on (Travis ATG, Siberia)
1150 * bit 2 Auto: ALS-based On; ALS-based Off (Travis ATG)
1151 * bit 3 Auto: ALS- and input-activity-based On; input-activity based Off
1152 * bit 4 Auto: Input-activity-based On; input-activity based Off
1153 * bit 5 Auto: Input-activity-based On (illumination level 25%); input-activity based Off
1154 * bit 6 Auto: Input-activity-based On (illumination level 50%); input-activity based Off
1155 * bit 7 Auto: Input-activity-based On (illumination level 75%); input-activity based Off
1156 * bit 8 Auto: Input-activity-based On (illumination level 100%); input-activity based Off
1157 * bits 9-15 Reserved for future use
1158 * Note: Only One bit can be set
1159 * cbRES2, byte2 Currently active auto keyboard illumination triggers.
1160 * bit 0 Any keystroke
1161 * bit 1 Touchpad activity
1162 * bit 2 Pointing stick
1163 * bit 3 Any mouse
1164 * bits 4-7 Reserved for future use
1165 * cbRES2, byte3 Current Timeout
1166 * bits 7:6 Timeout units indicator:
1167 * 00b Seconds
1168 * 01b Minutes
1169 * 10b Hours
1170 * 11b Days
1171 * bits 5:0 Timeout value (0-63) in sec/min/hr/day
1172 * NOTE: A value of 0 means always on (no timeout) if any bits of RES3 byte
1173 * are set upon return from the [Get feature information] call.
1174 * cbRES3, byte0 Current setting of ALS value that turns the light on or off.
1175 * cbRES3, byte1 Current ALS reading
1176 * cbRES3, byte2 Current keyboard light level.
1177 *
1178 * cbArg1 0x2 = Set New State
1179 * cbRES1 Standard return codes (0, -1, -2)
1180 * cbArg2, word0 Bitmap of current mode state
1181 * bit 0 Always off (All systems)
1182 * bit 1 Always on (Travis ATG, Siberia)
1183 * bit 2 Auto: ALS-based On; ALS-based Off (Travis ATG)
1184 * bit 3 Auto: ALS- and input-activity-based On; input-activity based Off
1185 * bit 4 Auto: Input-activity-based On; input-activity based Off
1186 * bit 5 Auto: Input-activity-based On (illumination level 25%); input-activity based Off
1187 * bit 6 Auto: Input-activity-based On (illumination level 50%); input-activity based Off
1188 * bit 7 Auto: Input-activity-based On (illumination level 75%); input-activity based Off
1189 * bit 8 Auto: Input-activity-based On (illumination level 100%); input-activity based Off
1190 * bits 9-15 Reserved for future use
1191 * Note: Only One bit can be set
1192 * cbArg2, byte2 Desired auto keyboard illumination triggers. Must remain inactive to allow
1193 * keyboard to turn off automatically.
1194 * bit 0 Any keystroke
1195 * bit 1 Touchpad activity
1196 * bit 2 Pointing stick
1197 * bit 3 Any mouse
1198 * bits 4-7 Reserved for future use
1199 * cbArg2, byte3 Desired Timeout
1200 * bits 7:6 Timeout units indicator:
1201 * 00b Seconds
1202 * 01b Minutes
1203 * 10b Hours
1204 * 11b Days
1205 * bits 5:0 Timeout value (0-63) in sec/min/hr/day
1206 * cbArg3, byte0 Desired setting of ALS value that turns the light on or off.
1207 * cbArg3, byte2 Desired keyboard light level.
1208 */
1209
1210
1211 enum kbd_timeout_unit {
1212 KBD_TIMEOUT_SECONDS = 0,
1213 KBD_TIMEOUT_MINUTES,
1214 KBD_TIMEOUT_HOURS,
1215 KBD_TIMEOUT_DAYS,
1216 };
1217
1218 enum kbd_mode_bit {
1219 KBD_MODE_BIT_OFF = 0,
1220 KBD_MODE_BIT_ON,
1221 KBD_MODE_BIT_ALS,
1222 KBD_MODE_BIT_TRIGGER_ALS,
1223 KBD_MODE_BIT_TRIGGER,
1224 KBD_MODE_BIT_TRIGGER_25,
1225 KBD_MODE_BIT_TRIGGER_50,
1226 KBD_MODE_BIT_TRIGGER_75,
1227 KBD_MODE_BIT_TRIGGER_100,
1228 };
1229
1230 #define kbd_is_als_mode_bit(bit) \
1231 ((bit) == KBD_MODE_BIT_ALS || (bit) == KBD_MODE_BIT_TRIGGER_ALS)
1232 #define kbd_is_trigger_mode_bit(bit) \
1233 ((bit) >= KBD_MODE_BIT_TRIGGER_ALS && (bit) <= KBD_MODE_BIT_TRIGGER_100)
1234 #define kbd_is_level_mode_bit(bit) \
1235 ((bit) >= KBD_MODE_BIT_TRIGGER_25 && (bit) <= KBD_MODE_BIT_TRIGGER_100)
1236
1237 struct kbd_info {
1238 u16 modes;
1239 u8 type;
1240 u8 triggers;
1241 u8 levels;
1242 u8 seconds;
1243 u8 minutes;
1244 u8 hours;
1245 u8 days;
1246 };
1247
1248 struct kbd_state {
1249 u8 mode_bit;
1250 u8 triggers;
1251 u8 timeout_value;
1252 u8 timeout_unit;
1253 u8 als_setting;
1254 u8 als_value;
1255 u8 level;
1256 };
1257
1258 static const int kbd_tokens[] = {
1259 KBD_LED_OFF_TOKEN,
1260 KBD_LED_AUTO_25_TOKEN,
1261 KBD_LED_AUTO_50_TOKEN,
1262 KBD_LED_AUTO_75_TOKEN,
1263 KBD_LED_AUTO_100_TOKEN,
1264 KBD_LED_ON_TOKEN,
1265 };
1266
1267 static u16 kbd_token_bits;
1268
1269 static struct kbd_info kbd_info;
1270 static bool kbd_als_supported;
1271 static bool kbd_triggers_supported;
1272
1273 static u8 kbd_mode_levels[16];
1274 static int kbd_mode_levels_count;
1275
1276 static u8 kbd_previous_level;
1277 static u8 kbd_previous_mode_bit;
1278
1279 static bool kbd_led_present;
1280
1281 /*
1282 * NOTE: there are three ways to set the keyboard backlight level.
1283 * First, via kbd_state.mode_bit (assigning KBD_MODE_BIT_TRIGGER_* value).
1284 * Second, via kbd_state.level (assigning numerical value <= kbd_info.levels).
1285 * Third, via SMBIOS tokens (KBD_LED_* in kbd_tokens)
1286 *
1287 * There are laptops which support only one of these methods. If we want to
1288 * support as many machines as possible we need to implement all three methods.
1289 * The first two methods use the kbd_state structure. The third uses SMBIOS
1290 * tokens. If kbd_info.levels == 0, the machine does not support setting the
1291 * keyboard backlight level via kbd_state.level.
1292 */
1293
kbd_get_info(struct kbd_info * info)1294 static int kbd_get_info(struct kbd_info *info)
1295 {
1296 u8 units;
1297 int ret;
1298
1299 get_buffer();
1300
1301 buffer->input[0] = 0x0;
1302 dell_send_request(buffer, 4, 11);
1303 ret = buffer->output[0];
1304
1305 if (ret) {
1306 ret = dell_smi_error(ret);
1307 goto out;
1308 }
1309
1310 info->modes = buffer->output[1] & 0xFFFF;
1311 info->type = (buffer->output[1] >> 24) & 0xFF;
1312 info->triggers = buffer->output[2] & 0xFF;
1313 units = (buffer->output[2] >> 8) & 0xFF;
1314 info->levels = (buffer->output[2] >> 16) & 0xFF;
1315
1316 if (units & BIT(0))
1317 info->seconds = (buffer->output[3] >> 0) & 0xFF;
1318 if (units & BIT(1))
1319 info->minutes = (buffer->output[3] >> 8) & 0xFF;
1320 if (units & BIT(2))
1321 info->hours = (buffer->output[3] >> 16) & 0xFF;
1322 if (units & BIT(3))
1323 info->days = (buffer->output[3] >> 24) & 0xFF;
1324
1325 out:
1326 release_buffer();
1327 return ret;
1328 }
1329
kbd_get_max_level(void)1330 static unsigned int kbd_get_max_level(void)
1331 {
1332 if (kbd_info.levels != 0)
1333 return kbd_info.levels;
1334 if (kbd_mode_levels_count > 0)
1335 return kbd_mode_levels_count - 1;
1336 return 0;
1337 }
1338
kbd_get_level(struct kbd_state * state)1339 static int kbd_get_level(struct kbd_state *state)
1340 {
1341 int i;
1342
1343 if (kbd_info.levels != 0)
1344 return state->level;
1345
1346 if (kbd_mode_levels_count > 0) {
1347 for (i = 0; i < kbd_mode_levels_count; ++i)
1348 if (kbd_mode_levels[i] == state->mode_bit)
1349 return i;
1350 return 0;
1351 }
1352
1353 return -EINVAL;
1354 }
1355
kbd_set_level(struct kbd_state * state,u8 level)1356 static int kbd_set_level(struct kbd_state *state, u8 level)
1357 {
1358 if (kbd_info.levels != 0) {
1359 if (level != 0)
1360 kbd_previous_level = level;
1361 if (state->level == level)
1362 return 0;
1363 state->level = level;
1364 if (level != 0 && state->mode_bit == KBD_MODE_BIT_OFF)
1365 state->mode_bit = kbd_previous_mode_bit;
1366 else if (level == 0 && state->mode_bit != KBD_MODE_BIT_OFF) {
1367 kbd_previous_mode_bit = state->mode_bit;
1368 state->mode_bit = KBD_MODE_BIT_OFF;
1369 }
1370 return 0;
1371 }
1372
1373 if (kbd_mode_levels_count > 0 && level < kbd_mode_levels_count) {
1374 if (level != 0)
1375 kbd_previous_level = level;
1376 state->mode_bit = kbd_mode_levels[level];
1377 return 0;
1378 }
1379
1380 return -EINVAL;
1381 }
1382
kbd_get_state(struct kbd_state * state)1383 static int kbd_get_state(struct kbd_state *state)
1384 {
1385 int ret;
1386
1387 get_buffer();
1388
1389 buffer->input[0] = 0x1;
1390 dell_send_request(buffer, 4, 11);
1391 ret = buffer->output[0];
1392
1393 if (ret) {
1394 ret = dell_smi_error(ret);
1395 goto out;
1396 }
1397
1398 state->mode_bit = ffs(buffer->output[1] & 0xFFFF);
1399 if (state->mode_bit != 0)
1400 state->mode_bit--;
1401
1402 state->triggers = (buffer->output[1] >> 16) & 0xFF;
1403 state->timeout_value = (buffer->output[1] >> 24) & 0x3F;
1404 state->timeout_unit = (buffer->output[1] >> 30) & 0x3;
1405 state->als_setting = buffer->output[2] & 0xFF;
1406 state->als_value = (buffer->output[2] >> 8) & 0xFF;
1407 state->level = (buffer->output[2] >> 16) & 0xFF;
1408
1409 out:
1410 release_buffer();
1411 return ret;
1412 }
1413
kbd_set_state(struct kbd_state * state)1414 static int kbd_set_state(struct kbd_state *state)
1415 {
1416 int ret;
1417
1418 get_buffer();
1419 buffer->input[0] = 0x2;
1420 buffer->input[1] = BIT(state->mode_bit) & 0xFFFF;
1421 buffer->input[1] |= (state->triggers & 0xFF) << 16;
1422 buffer->input[1] |= (state->timeout_value & 0x3F) << 24;
1423 buffer->input[1] |= (state->timeout_unit & 0x3) << 30;
1424 buffer->input[2] = state->als_setting & 0xFF;
1425 buffer->input[2] |= (state->level & 0xFF) << 16;
1426 dell_send_request(buffer, 4, 11);
1427 ret = buffer->output[0];
1428 release_buffer();
1429
1430 return dell_smi_error(ret);
1431 }
1432
kbd_set_state_safe(struct kbd_state * state,struct kbd_state * old)1433 static int kbd_set_state_safe(struct kbd_state *state, struct kbd_state *old)
1434 {
1435 int ret;
1436
1437 ret = kbd_set_state(state);
1438 if (ret == 0)
1439 return 0;
1440
1441 /*
1442 * When setting the new state fails,try to restore the previous one.
1443 * This is needed on some machines where BIOS sets a default state when
1444 * setting a new state fails. This default state could be all off.
1445 */
1446
1447 if (kbd_set_state(old))
1448 pr_err("Setting old previous keyboard state failed\n");
1449
1450 return ret;
1451 }
1452
kbd_set_token_bit(u8 bit)1453 static int kbd_set_token_bit(u8 bit)
1454 {
1455 int id;
1456 int ret;
1457
1458 if (bit >= ARRAY_SIZE(kbd_tokens))
1459 return -EINVAL;
1460
1461 id = find_token_id(kbd_tokens[bit]);
1462 if (id == -1)
1463 return -EINVAL;
1464
1465 get_buffer();
1466 buffer->input[0] = da_tokens[id].location;
1467 buffer->input[1] = da_tokens[id].value;
1468 dell_send_request(buffer, 1, 0);
1469 ret = buffer->output[0];
1470 release_buffer();
1471
1472 return dell_smi_error(ret);
1473 }
1474
kbd_get_token_bit(u8 bit)1475 static int kbd_get_token_bit(u8 bit)
1476 {
1477 int id;
1478 int ret;
1479 int val;
1480
1481 if (bit >= ARRAY_SIZE(kbd_tokens))
1482 return -EINVAL;
1483
1484 id = find_token_id(kbd_tokens[bit]);
1485 if (id == -1)
1486 return -EINVAL;
1487
1488 get_buffer();
1489 buffer->input[0] = da_tokens[id].location;
1490 dell_send_request(buffer, 0, 0);
1491 ret = buffer->output[0];
1492 val = buffer->output[1];
1493 release_buffer();
1494
1495 if (ret)
1496 return dell_smi_error(ret);
1497
1498 return (val == da_tokens[id].value);
1499 }
1500
kbd_get_first_active_token_bit(void)1501 static int kbd_get_first_active_token_bit(void)
1502 {
1503 int i;
1504 int ret;
1505
1506 for (i = 0; i < ARRAY_SIZE(kbd_tokens); ++i) {
1507 ret = kbd_get_token_bit(i);
1508 if (ret == 1)
1509 return i;
1510 }
1511
1512 return ret;
1513 }
1514
kbd_get_valid_token_counts(void)1515 static int kbd_get_valid_token_counts(void)
1516 {
1517 return hweight16(kbd_token_bits);
1518 }
1519
kbd_init_info(void)1520 static inline int kbd_init_info(void)
1521 {
1522 struct kbd_state state;
1523 int ret;
1524 int i;
1525
1526 ret = kbd_get_info(&kbd_info);
1527 if (ret)
1528 return ret;
1529
1530 kbd_get_state(&state);
1531
1532 /* NOTE: timeout value is stored in 6 bits so max value is 63 */
1533 if (kbd_info.seconds > 63)
1534 kbd_info.seconds = 63;
1535 if (kbd_info.minutes > 63)
1536 kbd_info.minutes = 63;
1537 if (kbd_info.hours > 63)
1538 kbd_info.hours = 63;
1539 if (kbd_info.days > 63)
1540 kbd_info.days = 63;
1541
1542 /* NOTE: On tested machines ON mode did not work and caused
1543 * problems (turned backlight off) so do not use it
1544 */
1545 kbd_info.modes &= ~BIT(KBD_MODE_BIT_ON);
1546
1547 kbd_previous_level = kbd_get_level(&state);
1548 kbd_previous_mode_bit = state.mode_bit;
1549
1550 if (kbd_previous_level == 0 && kbd_get_max_level() != 0)
1551 kbd_previous_level = 1;
1552
1553 if (kbd_previous_mode_bit == KBD_MODE_BIT_OFF) {
1554 kbd_previous_mode_bit =
1555 ffs(kbd_info.modes & ~BIT(KBD_MODE_BIT_OFF));
1556 if (kbd_previous_mode_bit != 0)
1557 kbd_previous_mode_bit--;
1558 }
1559
1560 if (kbd_info.modes & (BIT(KBD_MODE_BIT_ALS) |
1561 BIT(KBD_MODE_BIT_TRIGGER_ALS)))
1562 kbd_als_supported = true;
1563
1564 if (kbd_info.modes & (
1565 BIT(KBD_MODE_BIT_TRIGGER_ALS) | BIT(KBD_MODE_BIT_TRIGGER) |
1566 BIT(KBD_MODE_BIT_TRIGGER_25) | BIT(KBD_MODE_BIT_TRIGGER_50) |
1567 BIT(KBD_MODE_BIT_TRIGGER_75) | BIT(KBD_MODE_BIT_TRIGGER_100)
1568 ))
1569 kbd_triggers_supported = true;
1570
1571 /* kbd_mode_levels[0] is reserved, see below */
1572 for (i = 0; i < 16; ++i)
1573 if (kbd_is_level_mode_bit(i) && (BIT(i) & kbd_info.modes))
1574 kbd_mode_levels[1 + kbd_mode_levels_count++] = i;
1575
1576 /*
1577 * Find the first supported mode and assign to kbd_mode_levels[0].
1578 * This should be 0 (off), but we cannot depend on the BIOS to
1579 * support 0.
1580 */
1581 if (kbd_mode_levels_count > 0) {
1582 for (i = 0; i < 16; ++i) {
1583 if (BIT(i) & kbd_info.modes) {
1584 kbd_mode_levels[0] = i;
1585 break;
1586 }
1587 }
1588 kbd_mode_levels_count++;
1589 }
1590
1591 return 0;
1592
1593 }
1594
kbd_init_tokens(void)1595 static inline void kbd_init_tokens(void)
1596 {
1597 int i;
1598
1599 for (i = 0; i < ARRAY_SIZE(kbd_tokens); ++i)
1600 if (find_token_id(kbd_tokens[i]) != -1)
1601 kbd_token_bits |= BIT(i);
1602 }
1603
kbd_init(void)1604 static void kbd_init(void)
1605 {
1606 int ret;
1607
1608 ret = kbd_init_info();
1609 kbd_init_tokens();
1610
1611 if (kbd_token_bits != 0 || ret == 0)
1612 kbd_led_present = true;
1613 }
1614
kbd_led_timeout_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)1615 static ssize_t kbd_led_timeout_store(struct device *dev,
1616 struct device_attribute *attr,
1617 const char *buf, size_t count)
1618 {
1619 struct kbd_state new_state;
1620 struct kbd_state state;
1621 bool convert;
1622 int value;
1623 int ret;
1624 char ch;
1625 u8 unit;
1626 int i;
1627
1628 ret = sscanf(buf, "%d %c", &value, &ch);
1629 if (ret < 1)
1630 return -EINVAL;
1631 else if (ret == 1)
1632 ch = 's';
1633
1634 if (value < 0)
1635 return -EINVAL;
1636
1637 convert = false;
1638
1639 switch (ch) {
1640 case 's':
1641 if (value > kbd_info.seconds)
1642 convert = true;
1643 unit = KBD_TIMEOUT_SECONDS;
1644 break;
1645 case 'm':
1646 if (value > kbd_info.minutes)
1647 convert = true;
1648 unit = KBD_TIMEOUT_MINUTES;
1649 break;
1650 case 'h':
1651 if (value > kbd_info.hours)
1652 convert = true;
1653 unit = KBD_TIMEOUT_HOURS;
1654 break;
1655 case 'd':
1656 if (value > kbd_info.days)
1657 convert = true;
1658 unit = KBD_TIMEOUT_DAYS;
1659 break;
1660 default:
1661 return -EINVAL;
1662 }
1663
1664 if (quirks && quirks->needs_kbd_timeouts)
1665 convert = true;
1666
1667 if (convert) {
1668 /* Convert value from current units to seconds */
1669 switch (unit) {
1670 case KBD_TIMEOUT_DAYS:
1671 value *= 24;
1672 case KBD_TIMEOUT_HOURS:
1673 value *= 60;
1674 case KBD_TIMEOUT_MINUTES:
1675 value *= 60;
1676 unit = KBD_TIMEOUT_SECONDS;
1677 }
1678
1679 if (quirks && quirks->needs_kbd_timeouts) {
1680 for (i = 0; quirks->kbd_timeouts[i] != -1; i++) {
1681 if (value <= quirks->kbd_timeouts[i]) {
1682 value = quirks->kbd_timeouts[i];
1683 break;
1684 }
1685 }
1686 }
1687
1688 if (value <= kbd_info.seconds && kbd_info.seconds) {
1689 unit = KBD_TIMEOUT_SECONDS;
1690 } else if (value / 60 <= kbd_info.minutes && kbd_info.minutes) {
1691 value /= 60;
1692 unit = KBD_TIMEOUT_MINUTES;
1693 } else if (value / (60 * 60) <= kbd_info.hours && kbd_info.hours) {
1694 value /= (60 * 60);
1695 unit = KBD_TIMEOUT_HOURS;
1696 } else if (value / (60 * 60 * 24) <= kbd_info.days && kbd_info.days) {
1697 value /= (60 * 60 * 24);
1698 unit = KBD_TIMEOUT_DAYS;
1699 } else {
1700 return -EINVAL;
1701 }
1702 }
1703
1704 ret = kbd_get_state(&state);
1705 if (ret)
1706 return ret;
1707
1708 new_state = state;
1709 new_state.timeout_value = value;
1710 new_state.timeout_unit = unit;
1711
1712 ret = kbd_set_state_safe(&new_state, &state);
1713 if (ret)
1714 return ret;
1715
1716 return count;
1717 }
1718
kbd_led_timeout_show(struct device * dev,struct device_attribute * attr,char * buf)1719 static ssize_t kbd_led_timeout_show(struct device *dev,
1720 struct device_attribute *attr, char *buf)
1721 {
1722 struct kbd_state state;
1723 int ret;
1724 int len;
1725
1726 ret = kbd_get_state(&state);
1727 if (ret)
1728 return ret;
1729
1730 len = sprintf(buf, "%d", state.timeout_value);
1731
1732 switch (state.timeout_unit) {
1733 case KBD_TIMEOUT_SECONDS:
1734 return len + sprintf(buf+len, "s\n");
1735 case KBD_TIMEOUT_MINUTES:
1736 return len + sprintf(buf+len, "m\n");
1737 case KBD_TIMEOUT_HOURS:
1738 return len + sprintf(buf+len, "h\n");
1739 case KBD_TIMEOUT_DAYS:
1740 return len + sprintf(buf+len, "d\n");
1741 default:
1742 return -EINVAL;
1743 }
1744
1745 return len;
1746 }
1747
1748 static DEVICE_ATTR(stop_timeout, S_IRUGO | S_IWUSR,
1749 kbd_led_timeout_show, kbd_led_timeout_store);
1750
1751 static const char * const kbd_led_triggers[] = {
1752 "keyboard",
1753 "touchpad",
1754 /*"trackstick"*/ NULL, /* NOTE: trackstick is just alias for touchpad */
1755 "mouse",
1756 };
1757
kbd_led_triggers_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)1758 static ssize_t kbd_led_triggers_store(struct device *dev,
1759 struct device_attribute *attr,
1760 const char *buf, size_t count)
1761 {
1762 struct kbd_state new_state;
1763 struct kbd_state state;
1764 bool triggers_enabled = false;
1765 int trigger_bit = -1;
1766 char trigger[21];
1767 int i, ret;
1768
1769 ret = sscanf(buf, "%20s", trigger);
1770 if (ret != 1)
1771 return -EINVAL;
1772
1773 if (trigger[0] != '+' && trigger[0] != '-')
1774 return -EINVAL;
1775
1776 ret = kbd_get_state(&state);
1777 if (ret)
1778 return ret;
1779
1780 if (kbd_triggers_supported)
1781 triggers_enabled = kbd_is_trigger_mode_bit(state.mode_bit);
1782
1783 if (kbd_triggers_supported) {
1784 for (i = 0; i < ARRAY_SIZE(kbd_led_triggers); ++i) {
1785 if (!(kbd_info.triggers & BIT(i)))
1786 continue;
1787 if (!kbd_led_triggers[i])
1788 continue;
1789 if (strcmp(trigger+1, kbd_led_triggers[i]) != 0)
1790 continue;
1791 if (trigger[0] == '+' &&
1792 triggers_enabled && (state.triggers & BIT(i)))
1793 return count;
1794 if (trigger[0] == '-' &&
1795 (!triggers_enabled || !(state.triggers & BIT(i))))
1796 return count;
1797 trigger_bit = i;
1798 break;
1799 }
1800 }
1801
1802 if (trigger_bit != -1) {
1803 new_state = state;
1804 if (trigger[0] == '+')
1805 new_state.triggers |= BIT(trigger_bit);
1806 else {
1807 new_state.triggers &= ~BIT(trigger_bit);
1808 /* NOTE: trackstick bit (2) must be disabled when
1809 * disabling touchpad bit (1), otherwise touchpad
1810 * bit (1) will not be disabled */
1811 if (trigger_bit == 1)
1812 new_state.triggers &= ~BIT(2);
1813 }
1814 if ((kbd_info.triggers & new_state.triggers) !=
1815 new_state.triggers)
1816 return -EINVAL;
1817 if (new_state.triggers && !triggers_enabled) {
1818 new_state.mode_bit = KBD_MODE_BIT_TRIGGER;
1819 kbd_set_level(&new_state, kbd_previous_level);
1820 } else if (new_state.triggers == 0) {
1821 kbd_set_level(&new_state, 0);
1822 }
1823 if (!(kbd_info.modes & BIT(new_state.mode_bit)))
1824 return -EINVAL;
1825 ret = kbd_set_state_safe(&new_state, &state);
1826 if (ret)
1827 return ret;
1828 if (new_state.mode_bit != KBD_MODE_BIT_OFF)
1829 kbd_previous_mode_bit = new_state.mode_bit;
1830 return count;
1831 }
1832
1833 return -EINVAL;
1834 }
1835
kbd_led_triggers_show(struct device * dev,struct device_attribute * attr,char * buf)1836 static ssize_t kbd_led_triggers_show(struct device *dev,
1837 struct device_attribute *attr, char *buf)
1838 {
1839 struct kbd_state state;
1840 bool triggers_enabled;
1841 int level, i, ret;
1842 int len = 0;
1843
1844 ret = kbd_get_state(&state);
1845 if (ret)
1846 return ret;
1847
1848 len = 0;
1849
1850 if (kbd_triggers_supported) {
1851 triggers_enabled = kbd_is_trigger_mode_bit(state.mode_bit);
1852 level = kbd_get_level(&state);
1853 for (i = 0; i < ARRAY_SIZE(kbd_led_triggers); ++i) {
1854 if (!(kbd_info.triggers & BIT(i)))
1855 continue;
1856 if (!kbd_led_triggers[i])
1857 continue;
1858 if ((triggers_enabled || level <= 0) &&
1859 (state.triggers & BIT(i)))
1860 buf[len++] = '+';
1861 else
1862 buf[len++] = '-';
1863 len += sprintf(buf+len, "%s ", kbd_led_triggers[i]);
1864 }
1865 }
1866
1867 if (len)
1868 buf[len - 1] = '\n';
1869
1870 return len;
1871 }
1872
1873 static DEVICE_ATTR(start_triggers, S_IRUGO | S_IWUSR,
1874 kbd_led_triggers_show, kbd_led_triggers_store);
1875
kbd_led_als_enabled_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)1876 static ssize_t kbd_led_als_enabled_store(struct device *dev,
1877 struct device_attribute *attr,
1878 const char *buf, size_t count)
1879 {
1880 struct kbd_state new_state;
1881 struct kbd_state state;
1882 bool triggers_enabled = false;
1883 int enable;
1884 int ret;
1885
1886 ret = kstrtoint(buf, 0, &enable);
1887 if (ret)
1888 return ret;
1889
1890 ret = kbd_get_state(&state);
1891 if (ret)
1892 return ret;
1893
1894 if (enable == kbd_is_als_mode_bit(state.mode_bit))
1895 return count;
1896
1897 new_state = state;
1898
1899 if (kbd_triggers_supported)
1900 triggers_enabled = kbd_is_trigger_mode_bit(state.mode_bit);
1901
1902 if (enable) {
1903 if (triggers_enabled)
1904 new_state.mode_bit = KBD_MODE_BIT_TRIGGER_ALS;
1905 else
1906 new_state.mode_bit = KBD_MODE_BIT_ALS;
1907 } else {
1908 if (triggers_enabled) {
1909 new_state.mode_bit = KBD_MODE_BIT_TRIGGER;
1910 kbd_set_level(&new_state, kbd_previous_level);
1911 } else {
1912 new_state.mode_bit = KBD_MODE_BIT_ON;
1913 }
1914 }
1915 if (!(kbd_info.modes & BIT(new_state.mode_bit)))
1916 return -EINVAL;
1917
1918 ret = kbd_set_state_safe(&new_state, &state);
1919 if (ret)
1920 return ret;
1921 kbd_previous_mode_bit = new_state.mode_bit;
1922
1923 return count;
1924 }
1925
kbd_led_als_enabled_show(struct device * dev,struct device_attribute * attr,char * buf)1926 static ssize_t kbd_led_als_enabled_show(struct device *dev,
1927 struct device_attribute *attr,
1928 char *buf)
1929 {
1930 struct kbd_state state;
1931 bool enabled = false;
1932 int ret;
1933
1934 ret = kbd_get_state(&state);
1935 if (ret)
1936 return ret;
1937 enabled = kbd_is_als_mode_bit(state.mode_bit);
1938
1939 return sprintf(buf, "%d\n", enabled ? 1 : 0);
1940 }
1941
1942 static DEVICE_ATTR(als_enabled, S_IRUGO | S_IWUSR,
1943 kbd_led_als_enabled_show, kbd_led_als_enabled_store);
1944
kbd_led_als_setting_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)1945 static ssize_t kbd_led_als_setting_store(struct device *dev,
1946 struct device_attribute *attr,
1947 const char *buf, size_t count)
1948 {
1949 struct kbd_state state;
1950 struct kbd_state new_state;
1951 u8 setting;
1952 int ret;
1953
1954 ret = kstrtou8(buf, 10, &setting);
1955 if (ret)
1956 return ret;
1957
1958 ret = kbd_get_state(&state);
1959 if (ret)
1960 return ret;
1961
1962 new_state = state;
1963 new_state.als_setting = setting;
1964
1965 ret = kbd_set_state_safe(&new_state, &state);
1966 if (ret)
1967 return ret;
1968
1969 return count;
1970 }
1971
kbd_led_als_setting_show(struct device * dev,struct device_attribute * attr,char * buf)1972 static ssize_t kbd_led_als_setting_show(struct device *dev,
1973 struct device_attribute *attr,
1974 char *buf)
1975 {
1976 struct kbd_state state;
1977 int ret;
1978
1979 ret = kbd_get_state(&state);
1980 if (ret)
1981 return ret;
1982
1983 return sprintf(buf, "%d\n", state.als_setting);
1984 }
1985
1986 static DEVICE_ATTR(als_setting, S_IRUGO | S_IWUSR,
1987 kbd_led_als_setting_show, kbd_led_als_setting_store);
1988
1989 static struct attribute *kbd_led_attrs[] = {
1990 &dev_attr_stop_timeout.attr,
1991 &dev_attr_start_triggers.attr,
1992 NULL,
1993 };
1994
1995 static const struct attribute_group kbd_led_group = {
1996 .attrs = kbd_led_attrs,
1997 };
1998
1999 static struct attribute *kbd_led_als_attrs[] = {
2000 &dev_attr_als_enabled.attr,
2001 &dev_attr_als_setting.attr,
2002 NULL,
2003 };
2004
2005 static const struct attribute_group kbd_led_als_group = {
2006 .attrs = kbd_led_als_attrs,
2007 };
2008
2009 static const struct attribute_group *kbd_led_groups[] = {
2010 &kbd_led_group,
2011 &kbd_led_als_group,
2012 NULL,
2013 };
2014
kbd_led_level_get(struct led_classdev * led_cdev)2015 static enum led_brightness kbd_led_level_get(struct led_classdev *led_cdev)
2016 {
2017 int ret;
2018 u16 num;
2019 struct kbd_state state;
2020
2021 if (kbd_get_max_level()) {
2022 ret = kbd_get_state(&state);
2023 if (ret)
2024 return 0;
2025 ret = kbd_get_level(&state);
2026 if (ret < 0)
2027 return 0;
2028 return ret;
2029 }
2030
2031 if (kbd_get_valid_token_counts()) {
2032 ret = kbd_get_first_active_token_bit();
2033 if (ret < 0)
2034 return 0;
2035 for (num = kbd_token_bits; num != 0 && ret > 0; --ret)
2036 num &= num - 1; /* clear the first bit set */
2037 if (num == 0)
2038 return 0;
2039 return ffs(num) - 1;
2040 }
2041
2042 pr_warn("Keyboard brightness level control not supported\n");
2043 return 0;
2044 }
2045
kbd_led_level_set(struct led_classdev * led_cdev,enum led_brightness value)2046 static void kbd_led_level_set(struct led_classdev *led_cdev,
2047 enum led_brightness value)
2048 {
2049 struct kbd_state state;
2050 struct kbd_state new_state;
2051 u16 num;
2052
2053 if (kbd_get_max_level()) {
2054 if (kbd_get_state(&state))
2055 return;
2056 new_state = state;
2057 if (kbd_set_level(&new_state, value))
2058 return;
2059 kbd_set_state_safe(&new_state, &state);
2060 return;
2061 }
2062
2063 if (kbd_get_valid_token_counts()) {
2064 for (num = kbd_token_bits; num != 0 && value > 0; --value)
2065 num &= num - 1; /* clear the first bit set */
2066 if (num == 0)
2067 return;
2068 kbd_set_token_bit(ffs(num) - 1);
2069 return;
2070 }
2071
2072 pr_warn("Keyboard brightness level control not supported\n");
2073 }
2074
2075 static struct led_classdev kbd_led = {
2076 .name = "dell::kbd_backlight",
2077 .brightness_set = kbd_led_level_set,
2078 .brightness_get = kbd_led_level_get,
2079 .groups = kbd_led_groups,
2080 };
2081
kbd_led_init(struct device * dev)2082 static int __init kbd_led_init(struct device *dev)
2083 {
2084 kbd_init();
2085 if (!kbd_led_present)
2086 return -ENODEV;
2087 if (!kbd_als_supported)
2088 kbd_led_groups[1] = NULL;
2089 kbd_led.max_brightness = kbd_get_max_level();
2090 if (!kbd_led.max_brightness) {
2091 kbd_led.max_brightness = kbd_get_valid_token_counts();
2092 if (kbd_led.max_brightness)
2093 kbd_led.max_brightness--;
2094 }
2095 return led_classdev_register(dev, &kbd_led);
2096 }
2097
brightness_set_exit(struct led_classdev * led_cdev,enum led_brightness value)2098 static void brightness_set_exit(struct led_classdev *led_cdev,
2099 enum led_brightness value)
2100 {
2101 /* Don't change backlight level on exit */
2102 };
2103
kbd_led_exit(void)2104 static void kbd_led_exit(void)
2105 {
2106 if (!kbd_led_present)
2107 return;
2108 kbd_led.brightness_set = brightness_set_exit;
2109 led_classdev_unregister(&kbd_led);
2110 }
2111
dell_init(void)2112 static int __init dell_init(void)
2113 {
2114 int max_intensity = 0;
2115 int token;
2116 int ret;
2117
2118 if (!dmi_check_system(dell_device_table))
2119 return -ENODEV;
2120
2121 quirks = NULL;
2122 /* find if this machine support other functions */
2123 dmi_check_system(dell_quirks);
2124
2125 dmi_walk(find_tokens, NULL);
2126
2127 if (!da_tokens) {
2128 pr_info("Unable to find dmi tokens\n");
2129 return -ENODEV;
2130 }
2131
2132 ret = platform_driver_register(&platform_driver);
2133 if (ret)
2134 goto fail_platform_driver;
2135 platform_device = platform_device_alloc("dell-laptop", -1);
2136 if (!platform_device) {
2137 ret = -ENOMEM;
2138 goto fail_platform_device1;
2139 }
2140 ret = platform_device_add(platform_device);
2141 if (ret)
2142 goto fail_platform_device2;
2143
2144 /*
2145 * Allocate buffer below 4GB for SMI data--only 32-bit physical addr
2146 * is passed to SMI handler.
2147 */
2148 buffer = (void *)__get_free_page(GFP_KERNEL | GFP_DMA32);
2149 if (!buffer) {
2150 ret = -ENOMEM;
2151 goto fail_buffer;
2152 }
2153
2154 ret = dell_setup_rfkill();
2155
2156 if (ret) {
2157 pr_warn("Unable to setup rfkill\n");
2158 goto fail_rfkill;
2159 }
2160
2161 if (quirks && quirks->touchpad_led)
2162 touchpad_led_init(&platform_device->dev);
2163
2164 kbd_led_init(&platform_device->dev);
2165
2166 dell_laptop_dir = debugfs_create_dir("dell_laptop", NULL);
2167 if (dell_laptop_dir != NULL)
2168 debugfs_create_file("rfkill", 0444, dell_laptop_dir, NULL,
2169 &dell_debugfs_fops);
2170
2171 if (acpi_video_get_backlight_type() != acpi_backlight_vendor)
2172 return 0;
2173
2174 token = find_token_location(BRIGHTNESS_TOKEN);
2175 if (token != -1) {
2176 get_buffer();
2177 buffer->input[0] = token;
2178 dell_send_request(buffer, 0, 2);
2179 if (buffer->output[0] == 0)
2180 max_intensity = buffer->output[3];
2181 release_buffer();
2182 }
2183
2184 if (max_intensity) {
2185 struct backlight_properties props;
2186 memset(&props, 0, sizeof(struct backlight_properties));
2187 props.type = BACKLIGHT_PLATFORM;
2188 props.max_brightness = max_intensity;
2189 dell_backlight_device = backlight_device_register("dell_backlight",
2190 &platform_device->dev,
2191 NULL,
2192 &dell_ops,
2193 &props);
2194
2195 if (IS_ERR(dell_backlight_device)) {
2196 ret = PTR_ERR(dell_backlight_device);
2197 dell_backlight_device = NULL;
2198 goto fail_backlight;
2199 }
2200
2201 dell_backlight_device->props.brightness =
2202 dell_get_intensity(dell_backlight_device);
2203 backlight_update_status(dell_backlight_device);
2204 }
2205
2206 return 0;
2207
2208 fail_backlight:
2209 dell_cleanup_rfkill();
2210 fail_rfkill:
2211 free_page((unsigned long)buffer);
2212 fail_buffer:
2213 platform_device_del(platform_device);
2214 fail_platform_device2:
2215 platform_device_put(platform_device);
2216 fail_platform_device1:
2217 platform_driver_unregister(&platform_driver);
2218 fail_platform_driver:
2219 kfree(da_tokens);
2220 return ret;
2221 }
2222
dell_exit(void)2223 static void __exit dell_exit(void)
2224 {
2225 debugfs_remove_recursive(dell_laptop_dir);
2226 if (quirks && quirks->touchpad_led)
2227 touchpad_led_exit();
2228 kbd_led_exit();
2229 backlight_device_unregister(dell_backlight_device);
2230 dell_cleanup_rfkill();
2231 if (platform_device) {
2232 platform_device_unregister(platform_device);
2233 platform_driver_unregister(&platform_driver);
2234 }
2235 kfree(da_tokens);
2236 free_page((unsigned long)buffer);
2237 }
2238
2239 /* dell-rbtn.c driver export functions which will not work correctly (and could
2240 * cause kernel crash) if they are called before dell-rbtn.c init code. This is
2241 * not problem when dell-rbtn.c is compiled as external module. When both files
2242 * (dell-rbtn.c and dell-laptop.c) are compiled statically into kernel, then we
2243 * need to ensure that dell_init() will be called after initializing dell-rbtn.
2244 * This can be achieved by late_initcall() instead module_init().
2245 */
2246 late_initcall(dell_init);
2247 module_exit(dell_exit);
2248
2249 MODULE_AUTHOR("Matthew Garrett <mjg@redhat.com>");
2250 MODULE_AUTHOR("Gabriele Mazzotta <gabriele.mzt@gmail.com>");
2251 MODULE_AUTHOR("Pali Rohár <pali.rohar@gmail.com>");
2252 MODULE_DESCRIPTION("Dell laptop driver");
2253 MODULE_LICENSE("GPL");
2254