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Merge tag 'platform-drivers-x86-v3.19-1' of git://git.infradead.org/users/dvhart...
[deliverable/linux.git] / drivers / platform / x86 / dell-laptop.c
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 "../../firmware/dcdbas.h"
35
36 #define BRIGHTNESS_TOKEN 0x7d
37 #define KBD_LED_OFF_TOKEN 0x01E1
38 #define KBD_LED_ON_TOKEN 0x01E2
39 #define KBD_LED_AUTO_TOKEN 0x01E3
40 #define KBD_LED_AUTO_25_TOKEN 0x02EA
41 #define KBD_LED_AUTO_50_TOKEN 0x02EB
42 #define KBD_LED_AUTO_75_TOKEN 0x02EC
43 #define KBD_LED_AUTO_100_TOKEN 0x02F6
44
45 /* This structure will be modified by the firmware when we enter
46 * system management mode, hence the volatiles */
47
48 struct calling_interface_buffer {
49 u16 class;
50 u16 select;
51 volatile u32 input[4];
52 volatile u32 output[4];
53 } __packed;
54
55 struct calling_interface_token {
56 u16 tokenID;
57 u16 location;
58 union {
59 u16 value;
60 u16 stringlength;
61 };
62 };
63
64 struct calling_interface_structure {
65 struct dmi_header header;
66 u16 cmdIOAddress;
67 u8 cmdIOCode;
68 u32 supportedCmds;
69 struct calling_interface_token tokens[];
70 } __packed;
71
72 struct quirk_entry {
73 u8 touchpad_led;
74
75 int needs_kbd_timeouts;
76 /*
77 * Ordered list of timeouts expressed in seconds.
78 * The list must end with -1
79 */
80 int kbd_timeouts[];
81 };
82
83 static struct quirk_entry *quirks;
84
85 static struct quirk_entry quirk_dell_vostro_v130 = {
86 .touchpad_led = 1,
87 };
88
89 static int __init dmi_matched(const struct dmi_system_id *dmi)
90 {
91 quirks = dmi->driver_data;
92 return 1;
93 }
94
95 /*
96 * These values come from Windows utility provided by Dell. If any other value
97 * is used then BIOS silently set timeout to 0 without any error message.
98 */
99 static struct quirk_entry quirk_dell_xps13_9333 = {
100 .needs_kbd_timeouts = 1,
101 .kbd_timeouts = { 0, 5, 15, 60, 5 * 60, 15 * 60, -1 },
102 };
103
104 static int da_command_address;
105 static int da_command_code;
106 static int da_num_tokens;
107 static struct calling_interface_token *da_tokens;
108
109 static struct platform_driver platform_driver = {
110 .driver = {
111 .name = "dell-laptop",
112 }
113 };
114
115 static struct platform_device *platform_device;
116 static struct backlight_device *dell_backlight_device;
117 static struct rfkill *wifi_rfkill;
118 static struct rfkill *bluetooth_rfkill;
119 static struct rfkill *wwan_rfkill;
120 static bool force_rfkill;
121
122 module_param(force_rfkill, bool, 0444);
123 MODULE_PARM_DESC(force_rfkill, "enable rfkill on non whitelisted models");
124
125 static const struct dmi_system_id dell_device_table[] __initconst = {
126 {
127 .ident = "Dell laptop",
128 .matches = {
129 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
130 DMI_MATCH(DMI_CHASSIS_TYPE, "8"),
131 },
132 },
133 {
134 .matches = {
135 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
136 DMI_MATCH(DMI_CHASSIS_TYPE, "9"), /*Laptop*/
137 },
138 },
139 {
140 .ident = "Dell Computer Corporation",
141 .matches = {
142 DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer Corporation"),
143 DMI_MATCH(DMI_CHASSIS_TYPE, "8"),
144 },
145 },
146 { }
147 };
148 MODULE_DEVICE_TABLE(dmi, dell_device_table);
149
150 static const struct dmi_system_id dell_quirks[] __initconst = {
151 {
152 .callback = dmi_matched,
153 .ident = "Dell Vostro V130",
154 .matches = {
155 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
156 DMI_MATCH(DMI_PRODUCT_NAME, "Vostro V130"),
157 },
158 .driver_data = &quirk_dell_vostro_v130,
159 },
160 {
161 .callback = dmi_matched,
162 .ident = "Dell Vostro V131",
163 .matches = {
164 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
165 DMI_MATCH(DMI_PRODUCT_NAME, "Vostro V131"),
166 },
167 .driver_data = &quirk_dell_vostro_v130,
168 },
169 {
170 .callback = dmi_matched,
171 .ident = "Dell Vostro 3350",
172 .matches = {
173 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
174 DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 3350"),
175 },
176 .driver_data = &quirk_dell_vostro_v130,
177 },
178 {
179 .callback = dmi_matched,
180 .ident = "Dell Vostro 3555",
181 .matches = {
182 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
183 DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 3555"),
184 },
185 .driver_data = &quirk_dell_vostro_v130,
186 },
187 {
188 .callback = dmi_matched,
189 .ident = "Dell Inspiron N311z",
190 .matches = {
191 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
192 DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron N311z"),
193 },
194 .driver_data = &quirk_dell_vostro_v130,
195 },
196 {
197 .callback = dmi_matched,
198 .ident = "Dell Inspiron M5110",
199 .matches = {
200 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
201 DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron M5110"),
202 },
203 .driver_data = &quirk_dell_vostro_v130,
204 },
205 {
206 .callback = dmi_matched,
207 .ident = "Dell Vostro 3360",
208 .matches = {
209 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
210 DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 3360"),
211 },
212 .driver_data = &quirk_dell_vostro_v130,
213 },
214 {
215 .callback = dmi_matched,
216 .ident = "Dell Vostro 3460",
217 .matches = {
218 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
219 DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 3460"),
220 },
221 .driver_data = &quirk_dell_vostro_v130,
222 },
223 {
224 .callback = dmi_matched,
225 .ident = "Dell Vostro 3560",
226 .matches = {
227 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
228 DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 3560"),
229 },
230 .driver_data = &quirk_dell_vostro_v130,
231 },
232 {
233 .callback = dmi_matched,
234 .ident = "Dell Vostro 3450",
235 .matches = {
236 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
237 DMI_MATCH(DMI_PRODUCT_NAME, "Dell System Vostro 3450"),
238 },
239 .driver_data = &quirk_dell_vostro_v130,
240 },
241 {
242 .callback = dmi_matched,
243 .ident = "Dell Inspiron 5420",
244 .matches = {
245 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
246 DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 5420"),
247 },
248 .driver_data = &quirk_dell_vostro_v130,
249 },
250 {
251 .callback = dmi_matched,
252 .ident = "Dell Inspiron 5520",
253 .matches = {
254 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
255 DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 5520"),
256 },
257 .driver_data = &quirk_dell_vostro_v130,
258 },
259 {
260 .callback = dmi_matched,
261 .ident = "Dell Inspiron 5720",
262 .matches = {
263 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
264 DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 5720"),
265 },
266 .driver_data = &quirk_dell_vostro_v130,
267 },
268 {
269 .callback = dmi_matched,
270 .ident = "Dell Inspiron 7420",
271 .matches = {
272 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
273 DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 7420"),
274 },
275 .driver_data = &quirk_dell_vostro_v130,
276 },
277 {
278 .callback = dmi_matched,
279 .ident = "Dell Inspiron 7520",
280 .matches = {
281 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
282 DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 7520"),
283 },
284 .driver_data = &quirk_dell_vostro_v130,
285 },
286 {
287 .callback = dmi_matched,
288 .ident = "Dell Inspiron 7720",
289 .matches = {
290 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
291 DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 7720"),
292 },
293 .driver_data = &quirk_dell_vostro_v130,
294 },
295 {
296 .callback = dmi_matched,
297 .ident = "Dell XPS13 9333",
298 .matches = {
299 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
300 DMI_MATCH(DMI_PRODUCT_NAME, "XPS13 9333"),
301 },
302 .driver_data = &quirk_dell_xps13_9333,
303 },
304 { }
305 };
306
307 static struct calling_interface_buffer *buffer;
308 static struct page *bufferpage;
309 static DEFINE_MUTEX(buffer_mutex);
310
311 static int hwswitch_state;
312
313 static void get_buffer(void)
314 {
315 mutex_lock(&buffer_mutex);
316 memset(buffer, 0, sizeof(struct calling_interface_buffer));
317 }
318
319 static void release_buffer(void)
320 {
321 mutex_unlock(&buffer_mutex);
322 }
323
324 static void __init parse_da_table(const struct dmi_header *dm)
325 {
326 /* Final token is a terminator, so we don't want to copy it */
327 int tokens = (dm->length-11)/sizeof(struct calling_interface_token)-1;
328 struct calling_interface_token *new_da_tokens;
329 struct calling_interface_structure *table =
330 container_of(dm, struct calling_interface_structure, header);
331
332 /* 4 bytes of table header, plus 7 bytes of Dell header, plus at least
333 6 bytes of entry */
334
335 if (dm->length < 17)
336 return;
337
338 da_command_address = table->cmdIOAddress;
339 da_command_code = table->cmdIOCode;
340
341 new_da_tokens = krealloc(da_tokens, (da_num_tokens + tokens) *
342 sizeof(struct calling_interface_token),
343 GFP_KERNEL);
344
345 if (!new_da_tokens)
346 return;
347 da_tokens = new_da_tokens;
348
349 memcpy(da_tokens+da_num_tokens, table->tokens,
350 sizeof(struct calling_interface_token) * tokens);
351
352 da_num_tokens += tokens;
353 }
354
355 static void __init find_tokens(const struct dmi_header *dm, void *dummy)
356 {
357 switch (dm->type) {
358 case 0xd4: /* Indexed IO */
359 case 0xd5: /* Protected Area Type 1 */
360 case 0xd6: /* Protected Area Type 2 */
361 break;
362 case 0xda: /* Calling interface */
363 parse_da_table(dm);
364 break;
365 }
366 }
367
368 static int find_token_id(int tokenid)
369 {
370 int i;
371
372 for (i = 0; i < da_num_tokens; i++) {
373 if (da_tokens[i].tokenID == tokenid)
374 return i;
375 }
376
377 return -1;
378 }
379
380 static int find_token_location(int tokenid)
381 {
382 int id;
383
384 id = find_token_id(tokenid);
385 if (id == -1)
386 return -1;
387
388 return da_tokens[id].location;
389 }
390
391 static struct calling_interface_buffer *
392 dell_send_request(struct calling_interface_buffer *buffer, int class,
393 int select)
394 {
395 struct smi_cmd command;
396
397 command.magic = SMI_CMD_MAGIC;
398 command.command_address = da_command_address;
399 command.command_code = da_command_code;
400 command.ebx = virt_to_phys(buffer);
401 command.ecx = 0x42534931;
402
403 buffer->class = class;
404 buffer->select = select;
405
406 dcdbas_smi_request(&command);
407
408 return buffer;
409 }
410
411 static inline int dell_smi_error(int value)
412 {
413 switch (value) {
414 case 0: /* Completed successfully */
415 return 0;
416 case -1: /* Completed with error */
417 return -EIO;
418 case -2: /* Function not supported */
419 return -ENXIO;
420 default: /* Unknown error */
421 return -EINVAL;
422 }
423 }
424
425 /* Derived from information in DellWirelessCtl.cpp:
426 Class 17, select 11 is radio control. It returns an array of 32-bit values.
427
428 Input byte 0 = 0: Wireless information
429
430 result[0]: return code
431 result[1]:
432 Bit 0: Hardware switch supported
433 Bit 1: Wifi locator supported
434 Bit 2: Wifi is supported
435 Bit 3: Bluetooth is supported
436 Bit 4: WWAN is supported
437 Bit 5: Wireless keyboard supported
438 Bits 6-7: Reserved
439 Bit 8: Wifi is installed
440 Bit 9: Bluetooth is installed
441 Bit 10: WWAN is installed
442 Bits 11-15: Reserved
443 Bit 16: Hardware switch is on
444 Bit 17: Wifi is blocked
445 Bit 18: Bluetooth is blocked
446 Bit 19: WWAN is blocked
447 Bits 20-31: Reserved
448 result[2]: NVRAM size in bytes
449 result[3]: NVRAM format version number
450
451 Input byte 0 = 2: Wireless switch configuration
452 result[0]: return code
453 result[1]:
454 Bit 0: Wifi controlled by switch
455 Bit 1: Bluetooth controlled by switch
456 Bit 2: WWAN controlled by switch
457 Bits 3-6: Reserved
458 Bit 7: Wireless switch config locked
459 Bit 8: Wifi locator enabled
460 Bits 9-14: Reserved
461 Bit 15: Wifi locator setting locked
462 Bits 16-31: Reserved
463 */
464
465 static int dell_rfkill_set(void *data, bool blocked)
466 {
467 int disable = blocked ? 1 : 0;
468 unsigned long radio = (unsigned long)data;
469 int hwswitch_bit = (unsigned long)data - 1;
470
471 get_buffer();
472 dell_send_request(buffer, 17, 11);
473
474 /* If the hardware switch controls this radio, and the hardware
475 switch is disabled, always disable the radio */
476 if ((hwswitch_state & BIT(hwswitch_bit)) &&
477 !(buffer->output[1] & BIT(16)))
478 disable = 1;
479
480 buffer->input[0] = (1 | (radio<<8) | (disable << 16));
481 dell_send_request(buffer, 17, 11);
482
483 release_buffer();
484 return 0;
485 }
486
487 /* Must be called with the buffer held */
488 static void dell_rfkill_update_sw_state(struct rfkill *rfkill, int radio,
489 int status)
490 {
491 if (status & BIT(0)) {
492 /* Has hw-switch, sync sw_state to BIOS */
493 int block = rfkill_blocked(rfkill);
494 buffer->input[0] = (1 | (radio << 8) | (block << 16));
495 dell_send_request(buffer, 17, 11);
496 } else {
497 /* No hw-switch, sync BIOS state to sw_state */
498 rfkill_set_sw_state(rfkill, !!(status & BIT(radio + 16)));
499 }
500 }
501
502 static void dell_rfkill_update_hw_state(struct rfkill *rfkill, int radio,
503 int status)
504 {
505 if (hwswitch_state & (BIT(radio - 1)))
506 rfkill_set_hw_state(rfkill, !(status & BIT(16)));
507 }
508
509 static void dell_rfkill_query(struct rfkill *rfkill, void *data)
510 {
511 int status;
512
513 get_buffer();
514 dell_send_request(buffer, 17, 11);
515 status = buffer->output[1];
516
517 dell_rfkill_update_hw_state(rfkill, (unsigned long)data, status);
518
519 release_buffer();
520 }
521
522 static const struct rfkill_ops dell_rfkill_ops = {
523 .set_block = dell_rfkill_set,
524 .query = dell_rfkill_query,
525 };
526
527 static struct dentry *dell_laptop_dir;
528
529 static int dell_debugfs_show(struct seq_file *s, void *data)
530 {
531 int status;
532
533 get_buffer();
534 dell_send_request(buffer, 17, 11);
535 status = buffer->output[1];
536 release_buffer();
537
538 seq_printf(s, "status:\t0x%X\n", status);
539 seq_printf(s, "Bit 0 : Hardware switch supported: %lu\n",
540 status & BIT(0));
541 seq_printf(s, "Bit 1 : Wifi locator supported: %lu\n",
542 (status & BIT(1)) >> 1);
543 seq_printf(s, "Bit 2 : Wifi is supported: %lu\n",
544 (status & BIT(2)) >> 2);
545 seq_printf(s, "Bit 3 : Bluetooth is supported: %lu\n",
546 (status & BIT(3)) >> 3);
547 seq_printf(s, "Bit 4 : WWAN is supported: %lu\n",
548 (status & BIT(4)) >> 4);
549 seq_printf(s, "Bit 5 : Wireless keyboard supported: %lu\n",
550 (status & BIT(5)) >> 5);
551 seq_printf(s, "Bit 8 : Wifi is installed: %lu\n",
552 (status & BIT(8)) >> 8);
553 seq_printf(s, "Bit 9 : Bluetooth is installed: %lu\n",
554 (status & BIT(9)) >> 9);
555 seq_printf(s, "Bit 10: WWAN is installed: %lu\n",
556 (status & BIT(10)) >> 10);
557 seq_printf(s, "Bit 16: Hardware switch is on: %lu\n",
558 (status & BIT(16)) >> 16);
559 seq_printf(s, "Bit 17: Wifi is blocked: %lu\n",
560 (status & BIT(17)) >> 17);
561 seq_printf(s, "Bit 18: Bluetooth is blocked: %lu\n",
562 (status & BIT(18)) >> 18);
563 seq_printf(s, "Bit 19: WWAN is blocked: %lu\n",
564 (status & BIT(19)) >> 19);
565
566 seq_printf(s, "\nhwswitch_state:\t0x%X\n", hwswitch_state);
567 seq_printf(s, "Bit 0 : Wifi controlled by switch: %lu\n",
568 hwswitch_state & BIT(0));
569 seq_printf(s, "Bit 1 : Bluetooth controlled by switch: %lu\n",
570 (hwswitch_state & BIT(1)) >> 1);
571 seq_printf(s, "Bit 2 : WWAN controlled by switch: %lu\n",
572 (hwswitch_state & BIT(2)) >> 2);
573 seq_printf(s, "Bit 7 : Wireless switch config locked: %lu\n",
574 (hwswitch_state & BIT(7)) >> 7);
575 seq_printf(s, "Bit 8 : Wifi locator enabled: %lu\n",
576 (hwswitch_state & BIT(8)) >> 8);
577 seq_printf(s, "Bit 15: Wifi locator setting locked: %lu\n",
578 (hwswitch_state & BIT(15)) >> 15);
579
580 return 0;
581 }
582
583 static int dell_debugfs_open(struct inode *inode, struct file *file)
584 {
585 return single_open(file, dell_debugfs_show, inode->i_private);
586 }
587
588 static const struct file_operations dell_debugfs_fops = {
589 .owner = THIS_MODULE,
590 .open = dell_debugfs_open,
591 .read = seq_read,
592 .llseek = seq_lseek,
593 .release = single_release,
594 };
595
596 static void dell_update_rfkill(struct work_struct *ignored)
597 {
598 int status;
599
600 get_buffer();
601 dell_send_request(buffer, 17, 11);
602 status = buffer->output[1];
603
604 if (wifi_rfkill) {
605 dell_rfkill_update_hw_state(wifi_rfkill, 1, status);
606 dell_rfkill_update_sw_state(wifi_rfkill, 1, status);
607 }
608 if (bluetooth_rfkill) {
609 dell_rfkill_update_hw_state(bluetooth_rfkill, 2, status);
610 dell_rfkill_update_sw_state(bluetooth_rfkill, 2, status);
611 }
612 if (wwan_rfkill) {
613 dell_rfkill_update_hw_state(wwan_rfkill, 3, status);
614 dell_rfkill_update_sw_state(wwan_rfkill, 3, status);
615 }
616
617 release_buffer();
618 }
619 static DECLARE_DELAYED_WORK(dell_rfkill_work, dell_update_rfkill);
620
621 static bool dell_laptop_i8042_filter(unsigned char data, unsigned char str,
622 struct serio *port)
623 {
624 static bool extended;
625
626 if (str & I8042_STR_AUXDATA)
627 return false;
628
629 if (unlikely(data == 0xe0)) {
630 extended = true;
631 return false;
632 } else if (unlikely(extended)) {
633 switch (data) {
634 case 0x8:
635 schedule_delayed_work(&dell_rfkill_work,
636 round_jiffies_relative(HZ / 4));
637 break;
638 }
639 extended = false;
640 }
641
642 return false;
643 }
644
645 static int __init dell_setup_rfkill(void)
646 {
647 int status, ret, whitelisted;
648 const char *product;
649
650 /*
651 * rfkill support causes trouble on various models, mostly Inspirons.
652 * So we whitelist certain series, and don't support rfkill on others.
653 */
654 whitelisted = 0;
655 product = dmi_get_system_info(DMI_PRODUCT_NAME);
656 if (product && (strncmp(product, "Latitude", 8) == 0 ||
657 strncmp(product, "Precision", 9) == 0))
658 whitelisted = 1;
659 if (!force_rfkill && !whitelisted)
660 return 0;
661
662 get_buffer();
663 dell_send_request(buffer, 17, 11);
664 status = buffer->output[1];
665 buffer->input[0] = 0x2;
666 dell_send_request(buffer, 17, 11);
667 hwswitch_state = buffer->output[1];
668 release_buffer();
669
670 if (!(status & BIT(0))) {
671 if (force_rfkill) {
672 /* No hwsitch, clear all hw-controlled bits */
673 hwswitch_state &= ~7;
674 } else {
675 /* rfkill is only tested on laptops with a hwswitch */
676 return 0;
677 }
678 }
679
680 if ((status & (1<<2|1<<8)) == (1<<2|1<<8)) {
681 wifi_rfkill = rfkill_alloc("dell-wifi", &platform_device->dev,
682 RFKILL_TYPE_WLAN,
683 &dell_rfkill_ops, (void *) 1);
684 if (!wifi_rfkill) {
685 ret = -ENOMEM;
686 goto err_wifi;
687 }
688 ret = rfkill_register(wifi_rfkill);
689 if (ret)
690 goto err_wifi;
691 }
692
693 if ((status & (1<<3|1<<9)) == (1<<3|1<<9)) {
694 bluetooth_rfkill = rfkill_alloc("dell-bluetooth",
695 &platform_device->dev,
696 RFKILL_TYPE_BLUETOOTH,
697 &dell_rfkill_ops, (void *) 2);
698 if (!bluetooth_rfkill) {
699 ret = -ENOMEM;
700 goto err_bluetooth;
701 }
702 ret = rfkill_register(bluetooth_rfkill);
703 if (ret)
704 goto err_bluetooth;
705 }
706
707 if ((status & (1<<4|1<<10)) == (1<<4|1<<10)) {
708 wwan_rfkill = rfkill_alloc("dell-wwan",
709 &platform_device->dev,
710 RFKILL_TYPE_WWAN,
711 &dell_rfkill_ops, (void *) 3);
712 if (!wwan_rfkill) {
713 ret = -ENOMEM;
714 goto err_wwan;
715 }
716 ret = rfkill_register(wwan_rfkill);
717 if (ret)
718 goto err_wwan;
719 }
720
721 ret = i8042_install_filter(dell_laptop_i8042_filter);
722 if (ret) {
723 pr_warn("Unable to install key filter\n");
724 goto err_filter;
725 }
726
727 return 0;
728 err_filter:
729 if (wwan_rfkill)
730 rfkill_unregister(wwan_rfkill);
731 err_wwan:
732 rfkill_destroy(wwan_rfkill);
733 if (bluetooth_rfkill)
734 rfkill_unregister(bluetooth_rfkill);
735 err_bluetooth:
736 rfkill_destroy(bluetooth_rfkill);
737 if (wifi_rfkill)
738 rfkill_unregister(wifi_rfkill);
739 err_wifi:
740 rfkill_destroy(wifi_rfkill);
741
742 return ret;
743 }
744
745 static void dell_cleanup_rfkill(void)
746 {
747 if (wifi_rfkill) {
748 rfkill_unregister(wifi_rfkill);
749 rfkill_destroy(wifi_rfkill);
750 }
751 if (bluetooth_rfkill) {
752 rfkill_unregister(bluetooth_rfkill);
753 rfkill_destroy(bluetooth_rfkill);
754 }
755 if (wwan_rfkill) {
756 rfkill_unregister(wwan_rfkill);
757 rfkill_destroy(wwan_rfkill);
758 }
759 }
760
761 static int dell_send_intensity(struct backlight_device *bd)
762 {
763 int ret = 0;
764
765 get_buffer();
766 buffer->input[0] = find_token_location(BRIGHTNESS_TOKEN);
767 buffer->input[1] = bd->props.brightness;
768
769 if (buffer->input[0] == -1) {
770 ret = -ENODEV;
771 goto out;
772 }
773
774 if (power_supply_is_system_supplied() > 0)
775 dell_send_request(buffer, 1, 2);
776 else
777 dell_send_request(buffer, 1, 1);
778
779 out:
780 release_buffer();
781 return ret;
782 }
783
784 static int dell_get_intensity(struct backlight_device *bd)
785 {
786 int ret = 0;
787
788 get_buffer();
789 buffer->input[0] = find_token_location(BRIGHTNESS_TOKEN);
790
791 if (buffer->input[0] == -1) {
792 ret = -ENODEV;
793 goto out;
794 }
795
796 if (power_supply_is_system_supplied() > 0)
797 dell_send_request(buffer, 0, 2);
798 else
799 dell_send_request(buffer, 0, 1);
800
801 ret = buffer->output[1];
802
803 out:
804 release_buffer();
805 return ret;
806 }
807
808 static const struct backlight_ops dell_ops = {
809 .get_brightness = dell_get_intensity,
810 .update_status = dell_send_intensity,
811 };
812
813 static void touchpad_led_on(void)
814 {
815 int command = 0x97;
816 char data = 1;
817 i8042_command(&data, command | 1 << 12);
818 }
819
820 static void touchpad_led_off(void)
821 {
822 int command = 0x97;
823 char data = 2;
824 i8042_command(&data, command | 1 << 12);
825 }
826
827 static void touchpad_led_set(struct led_classdev *led_cdev,
828 enum led_brightness value)
829 {
830 if (value > 0)
831 touchpad_led_on();
832 else
833 touchpad_led_off();
834 }
835
836 static struct led_classdev touchpad_led = {
837 .name = "dell-laptop::touchpad",
838 .brightness_set = touchpad_led_set,
839 .flags = LED_CORE_SUSPENDRESUME,
840 };
841
842 static int __init touchpad_led_init(struct device *dev)
843 {
844 return led_classdev_register(dev, &touchpad_led);
845 }
846
847 static void touchpad_led_exit(void)
848 {
849 led_classdev_unregister(&touchpad_led);
850 }
851
852 /*
853 * Derived from information in smbios-keyboard-ctl:
854 *
855 * cbClass 4
856 * cbSelect 11
857 * Keyboard illumination
858 * cbArg1 determines the function to be performed
859 *
860 * cbArg1 0x0 = Get Feature Information
861 * cbRES1 Standard return codes (0, -1, -2)
862 * cbRES2, word0 Bitmap of user-selectable modes
863 * bit 0 Always off (All systems)
864 * bit 1 Always on (Travis ATG, Siberia)
865 * bit 2 Auto: ALS-based On; ALS-based Off (Travis ATG)
866 * bit 3 Auto: ALS- and input-activity-based On; input-activity based Off
867 * bit 4 Auto: Input-activity-based On; input-activity based Off
868 * bit 5 Auto: Input-activity-based On (illumination level 25%); input-activity based Off
869 * bit 6 Auto: Input-activity-based On (illumination level 50%); input-activity based Off
870 * bit 7 Auto: Input-activity-based On (illumination level 75%); input-activity based Off
871 * bit 8 Auto: Input-activity-based On (illumination level 100%); input-activity based Off
872 * bits 9-15 Reserved for future use
873 * cbRES2, byte2 Reserved for future use
874 * cbRES2, byte3 Keyboard illumination type
875 * 0 Reserved
876 * 1 Tasklight
877 * 2 Backlight
878 * 3-255 Reserved for future use
879 * cbRES3, byte0 Supported auto keyboard illumination trigger bitmap.
880 * bit 0 Any keystroke
881 * bit 1 Touchpad activity
882 * bit 2 Pointing stick
883 * bit 3 Any mouse
884 * bits 4-7 Reserved for future use
885 * cbRES3, byte1 Supported timeout unit bitmap
886 * bit 0 Seconds
887 * bit 1 Minutes
888 * bit 2 Hours
889 * bit 3 Days
890 * bits 4-7 Reserved for future use
891 * cbRES3, byte2 Number of keyboard light brightness levels
892 * cbRES4, byte0 Maximum acceptable seconds value (0 if seconds not supported).
893 * cbRES4, byte1 Maximum acceptable minutes value (0 if minutes not supported).
894 * cbRES4, byte2 Maximum acceptable hours value (0 if hours not supported).
895 * cbRES4, byte3 Maximum acceptable days value (0 if days not supported)
896 *
897 * cbArg1 0x1 = Get Current State
898 * cbRES1 Standard return codes (0, -1, -2)
899 * cbRES2, word0 Bitmap of current mode state
900 * bit 0 Always off (All systems)
901 * bit 1 Always on (Travis ATG, Siberia)
902 * bit 2 Auto: ALS-based On; ALS-based Off (Travis ATG)
903 * bit 3 Auto: ALS- and input-activity-based On; input-activity based Off
904 * bit 4 Auto: Input-activity-based On; input-activity based Off
905 * bit 5 Auto: Input-activity-based On (illumination level 25%); input-activity based Off
906 * bit 6 Auto: Input-activity-based On (illumination level 50%); input-activity based Off
907 * bit 7 Auto: Input-activity-based On (illumination level 75%); input-activity based Off
908 * bit 8 Auto: Input-activity-based On (illumination level 100%); input-activity based Off
909 * bits 9-15 Reserved for future use
910 * Note: Only One bit can be set
911 * cbRES2, byte2 Currently active auto keyboard illumination triggers.
912 * bit 0 Any keystroke
913 * bit 1 Touchpad activity
914 * bit 2 Pointing stick
915 * bit 3 Any mouse
916 * bits 4-7 Reserved for future use
917 * cbRES2, byte3 Current Timeout
918 * bits 7:6 Timeout units indicator:
919 * 00b Seconds
920 * 01b Minutes
921 * 10b Hours
922 * 11b Days
923 * bits 5:0 Timeout value (0-63) in sec/min/hr/day
924 * NOTE: A value of 0 means always on (no timeout) if any bits of RES3 byte
925 * are set upon return from the [Get feature information] call.
926 * cbRES3, byte0 Current setting of ALS value that turns the light on or off.
927 * cbRES3, byte1 Current ALS reading
928 * cbRES3, byte2 Current keyboard light level.
929 *
930 * cbArg1 0x2 = Set New State
931 * cbRES1 Standard return codes (0, -1, -2)
932 * cbArg2, word0 Bitmap of current mode state
933 * bit 0 Always off (All systems)
934 * bit 1 Always on (Travis ATG, Siberia)
935 * bit 2 Auto: ALS-based On; ALS-based Off (Travis ATG)
936 * bit 3 Auto: ALS- and input-activity-based On; input-activity based Off
937 * bit 4 Auto: Input-activity-based On; input-activity based Off
938 * bit 5 Auto: Input-activity-based On (illumination level 25%); input-activity based Off
939 * bit 6 Auto: Input-activity-based On (illumination level 50%); input-activity based Off
940 * bit 7 Auto: Input-activity-based On (illumination level 75%); input-activity based Off
941 * bit 8 Auto: Input-activity-based On (illumination level 100%); input-activity based Off
942 * bits 9-15 Reserved for future use
943 * Note: Only One bit can be set
944 * cbArg2, byte2 Desired auto keyboard illumination triggers. Must remain inactive to allow
945 * keyboard to turn off automatically.
946 * bit 0 Any keystroke
947 * bit 1 Touchpad activity
948 * bit 2 Pointing stick
949 * bit 3 Any mouse
950 * bits 4-7 Reserved for future use
951 * cbArg2, byte3 Desired Timeout
952 * bits 7:6 Timeout units indicator:
953 * 00b Seconds
954 * 01b Minutes
955 * 10b Hours
956 * 11b Days
957 * bits 5:0 Timeout value (0-63) in sec/min/hr/day
958 * cbArg3, byte0 Desired setting of ALS value that turns the light on or off.
959 * cbArg3, byte2 Desired keyboard light level.
960 */
961
962
963 enum kbd_timeout_unit {
964 KBD_TIMEOUT_SECONDS = 0,
965 KBD_TIMEOUT_MINUTES,
966 KBD_TIMEOUT_HOURS,
967 KBD_TIMEOUT_DAYS,
968 };
969
970 enum kbd_mode_bit {
971 KBD_MODE_BIT_OFF = 0,
972 KBD_MODE_BIT_ON,
973 KBD_MODE_BIT_ALS,
974 KBD_MODE_BIT_TRIGGER_ALS,
975 KBD_MODE_BIT_TRIGGER,
976 KBD_MODE_BIT_TRIGGER_25,
977 KBD_MODE_BIT_TRIGGER_50,
978 KBD_MODE_BIT_TRIGGER_75,
979 KBD_MODE_BIT_TRIGGER_100,
980 };
981
982 #define kbd_is_als_mode_bit(bit) \
983 ((bit) == KBD_MODE_BIT_ALS || (bit) == KBD_MODE_BIT_TRIGGER_ALS)
984 #define kbd_is_trigger_mode_bit(bit) \
985 ((bit) >= KBD_MODE_BIT_TRIGGER_ALS && (bit) <= KBD_MODE_BIT_TRIGGER_100)
986 #define kbd_is_level_mode_bit(bit) \
987 ((bit) >= KBD_MODE_BIT_TRIGGER_25 && (bit) <= KBD_MODE_BIT_TRIGGER_100)
988
989 struct kbd_info {
990 u16 modes;
991 u8 type;
992 u8 triggers;
993 u8 levels;
994 u8 seconds;
995 u8 minutes;
996 u8 hours;
997 u8 days;
998 };
999
1000 struct kbd_state {
1001 u8 mode_bit;
1002 u8 triggers;
1003 u8 timeout_value;
1004 u8 timeout_unit;
1005 u8 als_setting;
1006 u8 als_value;
1007 u8 level;
1008 };
1009
1010 static const int kbd_tokens[] = {
1011 KBD_LED_OFF_TOKEN,
1012 KBD_LED_AUTO_25_TOKEN,
1013 KBD_LED_AUTO_50_TOKEN,
1014 KBD_LED_AUTO_75_TOKEN,
1015 KBD_LED_AUTO_100_TOKEN,
1016 KBD_LED_ON_TOKEN,
1017 };
1018
1019 static u16 kbd_token_bits;
1020
1021 static struct kbd_info kbd_info;
1022 static bool kbd_als_supported;
1023 static bool kbd_triggers_supported;
1024
1025 static u8 kbd_mode_levels[16];
1026 static int kbd_mode_levels_count;
1027
1028 static u8 kbd_previous_level;
1029 static u8 kbd_previous_mode_bit;
1030
1031 static bool kbd_led_present;
1032
1033 /*
1034 * NOTE: there are three ways to set the keyboard backlight level.
1035 * First, via kbd_state.mode_bit (assigning KBD_MODE_BIT_TRIGGER_* value).
1036 * Second, via kbd_state.level (assigning numerical value <= kbd_info.levels).
1037 * Third, via SMBIOS tokens (KBD_LED_* in kbd_tokens)
1038 *
1039 * There are laptops which support only one of these methods. If we want to
1040 * support as many machines as possible we need to implement all three methods.
1041 * The first two methods use the kbd_state structure. The third uses SMBIOS
1042 * tokens. If kbd_info.levels == 0, the machine does not support setting the
1043 * keyboard backlight level via kbd_state.level.
1044 */
1045
1046 static int kbd_get_info(struct kbd_info *info)
1047 {
1048 u8 units;
1049 int ret;
1050
1051 get_buffer();
1052
1053 buffer->input[0] = 0x0;
1054 dell_send_request(buffer, 4, 11);
1055 ret = buffer->output[0];
1056
1057 if (ret) {
1058 ret = dell_smi_error(ret);
1059 goto out;
1060 }
1061
1062 info->modes = buffer->output[1] & 0xFFFF;
1063 info->type = (buffer->output[1] >> 24) & 0xFF;
1064 info->triggers = buffer->output[2] & 0xFF;
1065 units = (buffer->output[2] >> 8) & 0xFF;
1066 info->levels = (buffer->output[2] >> 16) & 0xFF;
1067
1068 if (units & BIT(0))
1069 info->seconds = (buffer->output[3] >> 0) & 0xFF;
1070 if (units & BIT(1))
1071 info->minutes = (buffer->output[3] >> 8) & 0xFF;
1072 if (units & BIT(2))
1073 info->hours = (buffer->output[3] >> 16) & 0xFF;
1074 if (units & BIT(3))
1075 info->days = (buffer->output[3] >> 24) & 0xFF;
1076
1077 out:
1078 release_buffer();
1079 return ret;
1080 }
1081
1082 static unsigned int kbd_get_max_level(void)
1083 {
1084 if (kbd_info.levels != 0)
1085 return kbd_info.levels;
1086 if (kbd_mode_levels_count > 0)
1087 return kbd_mode_levels_count - 1;
1088 return 0;
1089 }
1090
1091 static int kbd_get_level(struct kbd_state *state)
1092 {
1093 int i;
1094
1095 if (kbd_info.levels != 0)
1096 return state->level;
1097
1098 if (kbd_mode_levels_count > 0) {
1099 for (i = 0; i < kbd_mode_levels_count; ++i)
1100 if (kbd_mode_levels[i] == state->mode_bit)
1101 return i;
1102 return 0;
1103 }
1104
1105 return -EINVAL;
1106 }
1107
1108 static int kbd_set_level(struct kbd_state *state, u8 level)
1109 {
1110 if (kbd_info.levels != 0) {
1111 if (level != 0)
1112 kbd_previous_level = level;
1113 if (state->level == level)
1114 return 0;
1115 state->level = level;
1116 if (level != 0 && state->mode_bit == KBD_MODE_BIT_OFF)
1117 state->mode_bit = kbd_previous_mode_bit;
1118 else if (level == 0 && state->mode_bit != KBD_MODE_BIT_OFF) {
1119 kbd_previous_mode_bit = state->mode_bit;
1120 state->mode_bit = KBD_MODE_BIT_OFF;
1121 }
1122 return 0;
1123 }
1124
1125 if (kbd_mode_levels_count > 0 && level < kbd_mode_levels_count) {
1126 if (level != 0)
1127 kbd_previous_level = level;
1128 state->mode_bit = kbd_mode_levels[level];
1129 return 0;
1130 }
1131
1132 return -EINVAL;
1133 }
1134
1135 static int kbd_get_state(struct kbd_state *state)
1136 {
1137 int ret;
1138
1139 get_buffer();
1140
1141 buffer->input[0] = 0x1;
1142 dell_send_request(buffer, 4, 11);
1143 ret = buffer->output[0];
1144
1145 if (ret) {
1146 ret = dell_smi_error(ret);
1147 goto out;
1148 }
1149
1150 state->mode_bit = ffs(buffer->output[1] & 0xFFFF);
1151 if (state->mode_bit != 0)
1152 state->mode_bit--;
1153
1154 state->triggers = (buffer->output[1] >> 16) & 0xFF;
1155 state->timeout_value = (buffer->output[1] >> 24) & 0x3F;
1156 state->timeout_unit = (buffer->output[1] >> 30) & 0x3;
1157 state->als_setting = buffer->output[2] & 0xFF;
1158 state->als_value = (buffer->output[2] >> 8) & 0xFF;
1159 state->level = (buffer->output[2] >> 16) & 0xFF;
1160
1161 out:
1162 release_buffer();
1163 return ret;
1164 }
1165
1166 static int kbd_set_state(struct kbd_state *state)
1167 {
1168 int ret;
1169
1170 get_buffer();
1171 buffer->input[0] = 0x2;
1172 buffer->input[1] = BIT(state->mode_bit) & 0xFFFF;
1173 buffer->input[1] |= (state->triggers & 0xFF) << 16;
1174 buffer->input[1] |= (state->timeout_value & 0x3F) << 24;
1175 buffer->input[1] |= (state->timeout_unit & 0x3) << 30;
1176 buffer->input[2] = state->als_setting & 0xFF;
1177 buffer->input[2] |= (state->level & 0xFF) << 16;
1178 dell_send_request(buffer, 4, 11);
1179 ret = buffer->output[0];
1180 release_buffer();
1181
1182 return dell_smi_error(ret);
1183 }
1184
1185 static int kbd_set_state_safe(struct kbd_state *state, struct kbd_state *old)
1186 {
1187 int ret;
1188
1189 ret = kbd_set_state(state);
1190 if (ret == 0)
1191 return 0;
1192
1193 /*
1194 * When setting the new state fails,try to restore the previous one.
1195 * This is needed on some machines where BIOS sets a default state when
1196 * setting a new state fails. This default state could be all off.
1197 */
1198
1199 if (kbd_set_state(old))
1200 pr_err("Setting old previous keyboard state failed\n");
1201
1202 return ret;
1203 }
1204
1205 static int kbd_set_token_bit(u8 bit)
1206 {
1207 int id;
1208 int ret;
1209
1210 if (bit >= ARRAY_SIZE(kbd_tokens))
1211 return -EINVAL;
1212
1213 id = find_token_id(kbd_tokens[bit]);
1214 if (id == -1)
1215 return -EINVAL;
1216
1217 get_buffer();
1218 buffer->input[0] = da_tokens[id].location;
1219 buffer->input[1] = da_tokens[id].value;
1220 dell_send_request(buffer, 1, 0);
1221 ret = buffer->output[0];
1222 release_buffer();
1223
1224 return dell_smi_error(ret);
1225 }
1226
1227 static int kbd_get_token_bit(u8 bit)
1228 {
1229 int id;
1230 int ret;
1231 int val;
1232
1233 if (bit >= ARRAY_SIZE(kbd_tokens))
1234 return -EINVAL;
1235
1236 id = find_token_id(kbd_tokens[bit]);
1237 if (id == -1)
1238 return -EINVAL;
1239
1240 get_buffer();
1241 buffer->input[0] = da_tokens[id].location;
1242 dell_send_request(buffer, 0, 0);
1243 ret = buffer->output[0];
1244 val = buffer->output[1];
1245 release_buffer();
1246
1247 if (ret)
1248 return dell_smi_error(ret);
1249
1250 return (val == da_tokens[id].value);
1251 }
1252
1253 static int kbd_get_first_active_token_bit(void)
1254 {
1255 int i;
1256 int ret;
1257
1258 for (i = 0; i < ARRAY_SIZE(kbd_tokens); ++i) {
1259 ret = kbd_get_token_bit(i);
1260 if (ret == 1)
1261 return i;
1262 }
1263
1264 return ret;
1265 }
1266
1267 static int kbd_get_valid_token_counts(void)
1268 {
1269 return hweight16(kbd_token_bits);
1270 }
1271
1272 static inline int kbd_init_info(void)
1273 {
1274 struct kbd_state state;
1275 int ret;
1276 int i;
1277
1278 ret = kbd_get_info(&kbd_info);
1279 if (ret)
1280 return ret;
1281
1282 kbd_get_state(&state);
1283
1284 /* NOTE: timeout value is stored in 6 bits so max value is 63 */
1285 if (kbd_info.seconds > 63)
1286 kbd_info.seconds = 63;
1287 if (kbd_info.minutes > 63)
1288 kbd_info.minutes = 63;
1289 if (kbd_info.hours > 63)
1290 kbd_info.hours = 63;
1291 if (kbd_info.days > 63)
1292 kbd_info.days = 63;
1293
1294 /* NOTE: On tested machines ON mode did not work and caused
1295 * problems (turned backlight off) so do not use it
1296 */
1297 kbd_info.modes &= ~BIT(KBD_MODE_BIT_ON);
1298
1299 kbd_previous_level = kbd_get_level(&state);
1300 kbd_previous_mode_bit = state.mode_bit;
1301
1302 if (kbd_previous_level == 0 && kbd_get_max_level() != 0)
1303 kbd_previous_level = 1;
1304
1305 if (kbd_previous_mode_bit == KBD_MODE_BIT_OFF) {
1306 kbd_previous_mode_bit =
1307 ffs(kbd_info.modes & ~BIT(KBD_MODE_BIT_OFF));
1308 if (kbd_previous_mode_bit != 0)
1309 kbd_previous_mode_bit--;
1310 }
1311
1312 if (kbd_info.modes & (BIT(KBD_MODE_BIT_ALS) |
1313 BIT(KBD_MODE_BIT_TRIGGER_ALS)))
1314 kbd_als_supported = true;
1315
1316 if (kbd_info.modes & (
1317 BIT(KBD_MODE_BIT_TRIGGER_ALS) | BIT(KBD_MODE_BIT_TRIGGER) |
1318 BIT(KBD_MODE_BIT_TRIGGER_25) | BIT(KBD_MODE_BIT_TRIGGER_50) |
1319 BIT(KBD_MODE_BIT_TRIGGER_75) | BIT(KBD_MODE_BIT_TRIGGER_100)
1320 ))
1321 kbd_triggers_supported = true;
1322
1323 /* kbd_mode_levels[0] is reserved, see below */
1324 for (i = 0; i < 16; ++i)
1325 if (kbd_is_level_mode_bit(i) && (BIT(i) & kbd_info.modes))
1326 kbd_mode_levels[1 + kbd_mode_levels_count++] = i;
1327
1328 /*
1329 * Find the first supported mode and assign to kbd_mode_levels[0].
1330 * This should be 0 (off), but we cannot depend on the BIOS to
1331 * support 0.
1332 */
1333 if (kbd_mode_levels_count > 0) {
1334 for (i = 0; i < 16; ++i) {
1335 if (BIT(i) & kbd_info.modes) {
1336 kbd_mode_levels[0] = i;
1337 break;
1338 }
1339 }
1340 kbd_mode_levels_count++;
1341 }
1342
1343 return 0;
1344
1345 }
1346
1347 static inline void kbd_init_tokens(void)
1348 {
1349 int i;
1350
1351 for (i = 0; i < ARRAY_SIZE(kbd_tokens); ++i)
1352 if (find_token_id(kbd_tokens[i]) != -1)
1353 kbd_token_bits |= BIT(i);
1354 }
1355
1356 static void kbd_init(void)
1357 {
1358 int ret;
1359
1360 ret = kbd_init_info();
1361 kbd_init_tokens();
1362
1363 if (kbd_token_bits != 0 || ret == 0)
1364 kbd_led_present = true;
1365 }
1366
1367 static ssize_t kbd_led_timeout_store(struct device *dev,
1368 struct device_attribute *attr,
1369 const char *buf, size_t count)
1370 {
1371 struct kbd_state new_state;
1372 struct kbd_state state;
1373 bool convert;
1374 int value;
1375 int ret;
1376 char ch;
1377 u8 unit;
1378 int i;
1379
1380 ret = sscanf(buf, "%d %c", &value, &ch);
1381 if (ret < 1)
1382 return -EINVAL;
1383 else if (ret == 1)
1384 ch = 's';
1385
1386 if (value < 0)
1387 return -EINVAL;
1388
1389 convert = false;
1390
1391 switch (ch) {
1392 case 's':
1393 if (value > kbd_info.seconds)
1394 convert = true;
1395 unit = KBD_TIMEOUT_SECONDS;
1396 break;
1397 case 'm':
1398 if (value > kbd_info.minutes)
1399 convert = true;
1400 unit = KBD_TIMEOUT_MINUTES;
1401 break;
1402 case 'h':
1403 if (value > kbd_info.hours)
1404 convert = true;
1405 unit = KBD_TIMEOUT_HOURS;
1406 break;
1407 case 'd':
1408 if (value > kbd_info.days)
1409 convert = true;
1410 unit = KBD_TIMEOUT_DAYS;
1411 break;
1412 default:
1413 return -EINVAL;
1414 }
1415
1416 if (quirks && quirks->needs_kbd_timeouts)
1417 convert = true;
1418
1419 if (convert) {
1420 /* Convert value from current units to seconds */
1421 switch (unit) {
1422 case KBD_TIMEOUT_DAYS:
1423 value *= 24;
1424 case KBD_TIMEOUT_HOURS:
1425 value *= 60;
1426 case KBD_TIMEOUT_MINUTES:
1427 value *= 60;
1428 unit = KBD_TIMEOUT_SECONDS;
1429 }
1430
1431 if (quirks && quirks->needs_kbd_timeouts) {
1432 for (i = 0; quirks->kbd_timeouts[i] != -1; i++) {
1433 if (value <= quirks->kbd_timeouts[i]) {
1434 value = quirks->kbd_timeouts[i];
1435 break;
1436 }
1437 }
1438 }
1439
1440 if (value <= kbd_info.seconds && kbd_info.seconds) {
1441 unit = KBD_TIMEOUT_SECONDS;
1442 } else if (value / 60 <= kbd_info.minutes && kbd_info.minutes) {
1443 value /= 60;
1444 unit = KBD_TIMEOUT_MINUTES;
1445 } else if (value / (60 * 60) <= kbd_info.hours && kbd_info.hours) {
1446 value /= (60 * 60);
1447 unit = KBD_TIMEOUT_HOURS;
1448 } else if (value / (60 * 60 * 24) <= kbd_info.days && kbd_info.days) {
1449 value /= (60 * 60 * 24);
1450 unit = KBD_TIMEOUT_DAYS;
1451 } else {
1452 return -EINVAL;
1453 }
1454 }
1455
1456 ret = kbd_get_state(&state);
1457 if (ret)
1458 return ret;
1459
1460 new_state = state;
1461 new_state.timeout_value = value;
1462 new_state.timeout_unit = unit;
1463
1464 ret = kbd_set_state_safe(&new_state, &state);
1465 if (ret)
1466 return ret;
1467
1468 return count;
1469 }
1470
1471 static ssize_t kbd_led_timeout_show(struct device *dev,
1472 struct device_attribute *attr, char *buf)
1473 {
1474 struct kbd_state state;
1475 int ret;
1476 int len;
1477
1478 ret = kbd_get_state(&state);
1479 if (ret)
1480 return ret;
1481
1482 len = sprintf(buf, "%d", state.timeout_value);
1483
1484 switch (state.timeout_unit) {
1485 case KBD_TIMEOUT_SECONDS:
1486 return len + sprintf(buf+len, "s\n");
1487 case KBD_TIMEOUT_MINUTES:
1488 return len + sprintf(buf+len, "m\n");
1489 case KBD_TIMEOUT_HOURS:
1490 return len + sprintf(buf+len, "h\n");
1491 case KBD_TIMEOUT_DAYS:
1492 return len + sprintf(buf+len, "d\n");
1493 default:
1494 return -EINVAL;
1495 }
1496
1497 return len;
1498 }
1499
1500 static DEVICE_ATTR(stop_timeout, S_IRUGO | S_IWUSR,
1501 kbd_led_timeout_show, kbd_led_timeout_store);
1502
1503 static const char * const kbd_led_triggers[] = {
1504 "keyboard",
1505 "touchpad",
1506 /*"trackstick"*/ NULL, /* NOTE: trackstick is just alias for touchpad */
1507 "mouse",
1508 };
1509
1510 static ssize_t kbd_led_triggers_store(struct device *dev,
1511 struct device_attribute *attr,
1512 const char *buf, size_t count)
1513 {
1514 struct kbd_state new_state;
1515 struct kbd_state state;
1516 bool triggers_enabled = false;
1517 bool als_enabled = false;
1518 bool disable_als = false;
1519 bool enable_als = false;
1520 int trigger_bit = -1;
1521 char trigger[21];
1522 int i, ret;
1523
1524 ret = sscanf(buf, "%20s", trigger);
1525 if (ret != 1)
1526 return -EINVAL;
1527
1528 if (trigger[0] != '+' && trigger[0] != '-')
1529 return -EINVAL;
1530
1531 ret = kbd_get_state(&state);
1532 if (ret)
1533 return ret;
1534
1535 if (kbd_als_supported)
1536 als_enabled = kbd_is_als_mode_bit(state.mode_bit);
1537
1538 if (kbd_triggers_supported)
1539 triggers_enabled = kbd_is_trigger_mode_bit(state.mode_bit);
1540
1541 if (kbd_als_supported) {
1542 if (strcmp(trigger, "+als") == 0) {
1543 if (als_enabled)
1544 return count;
1545 enable_als = true;
1546 } else if (strcmp(trigger, "-als") == 0) {
1547 if (!als_enabled)
1548 return count;
1549 disable_als = true;
1550 }
1551 }
1552
1553 if (enable_als || disable_als) {
1554 new_state = state;
1555 if (enable_als) {
1556 if (triggers_enabled)
1557 new_state.mode_bit = KBD_MODE_BIT_TRIGGER_ALS;
1558 else
1559 new_state.mode_bit = KBD_MODE_BIT_ALS;
1560 } else {
1561 if (triggers_enabled) {
1562 new_state.mode_bit = KBD_MODE_BIT_TRIGGER;
1563 kbd_set_level(&new_state, kbd_previous_level);
1564 } else {
1565 new_state.mode_bit = KBD_MODE_BIT_ON;
1566 }
1567 }
1568 if (!(kbd_info.modes & BIT(new_state.mode_bit)))
1569 return -EINVAL;
1570 ret = kbd_set_state_safe(&new_state, &state);
1571 if (ret)
1572 return ret;
1573 kbd_previous_mode_bit = new_state.mode_bit;
1574 return count;
1575 }
1576
1577 if (kbd_triggers_supported) {
1578 for (i = 0; i < ARRAY_SIZE(kbd_led_triggers); ++i) {
1579 if (!(kbd_info.triggers & BIT(i)))
1580 continue;
1581 if (!kbd_led_triggers[i])
1582 continue;
1583 if (strcmp(trigger+1, kbd_led_triggers[i]) != 0)
1584 continue;
1585 if (trigger[0] == '+' &&
1586 triggers_enabled && (state.triggers & BIT(i)))
1587 return count;
1588 if (trigger[0] == '-' &&
1589 (!triggers_enabled || !(state.triggers & BIT(i))))
1590 return count;
1591 trigger_bit = i;
1592 break;
1593 }
1594 }
1595
1596 if (trigger_bit != -1) {
1597 new_state = state;
1598 if (trigger[0] == '+')
1599 new_state.triggers |= BIT(trigger_bit);
1600 else {
1601 new_state.triggers &= ~BIT(trigger_bit);
1602 /* NOTE: trackstick bit (2) must be disabled when
1603 * disabling touchpad bit (1), otherwise touchpad
1604 * bit (1) will not be disabled */
1605 if (trigger_bit == 1)
1606 new_state.triggers &= ~BIT(2);
1607 }
1608 if ((kbd_info.triggers & new_state.triggers) !=
1609 new_state.triggers)
1610 return -EINVAL;
1611 if (new_state.triggers && !triggers_enabled) {
1612 if (als_enabled)
1613 new_state.mode_bit = KBD_MODE_BIT_TRIGGER_ALS;
1614 else {
1615 new_state.mode_bit = KBD_MODE_BIT_TRIGGER;
1616 kbd_set_level(&new_state, kbd_previous_level);
1617 }
1618 } else if (new_state.triggers == 0) {
1619 if (als_enabled)
1620 new_state.mode_bit = KBD_MODE_BIT_ALS;
1621 else
1622 kbd_set_level(&new_state, 0);
1623 }
1624 if (!(kbd_info.modes & BIT(new_state.mode_bit)))
1625 return -EINVAL;
1626 ret = kbd_set_state_safe(&new_state, &state);
1627 if (ret)
1628 return ret;
1629 if (new_state.mode_bit != KBD_MODE_BIT_OFF)
1630 kbd_previous_mode_bit = new_state.mode_bit;
1631 return count;
1632 }
1633
1634 return -EINVAL;
1635 }
1636
1637 static ssize_t kbd_led_triggers_show(struct device *dev,
1638 struct device_attribute *attr, char *buf)
1639 {
1640 struct kbd_state state;
1641 bool triggers_enabled;
1642 int level, i, ret;
1643 int len = 0;
1644
1645 ret = kbd_get_state(&state);
1646 if (ret)
1647 return ret;
1648
1649 len = 0;
1650
1651 if (kbd_triggers_supported) {
1652 triggers_enabled = kbd_is_trigger_mode_bit(state.mode_bit);
1653 level = kbd_get_level(&state);
1654 for (i = 0; i < ARRAY_SIZE(kbd_led_triggers); ++i) {
1655 if (!(kbd_info.triggers & BIT(i)))
1656 continue;
1657 if (!kbd_led_triggers[i])
1658 continue;
1659 if ((triggers_enabled || level <= 0) &&
1660 (state.triggers & BIT(i)))
1661 buf[len++] = '+';
1662 else
1663 buf[len++] = '-';
1664 len += sprintf(buf+len, "%s ", kbd_led_triggers[i]);
1665 }
1666 }
1667
1668 if (kbd_als_supported) {
1669 if (kbd_is_als_mode_bit(state.mode_bit))
1670 len += sprintf(buf+len, "+als ");
1671 else
1672 len += sprintf(buf+len, "-als ");
1673 }
1674
1675 if (len)
1676 buf[len - 1] = '\n';
1677
1678 return len;
1679 }
1680
1681 static DEVICE_ATTR(start_triggers, S_IRUGO | S_IWUSR,
1682 kbd_led_triggers_show, kbd_led_triggers_store);
1683
1684 static ssize_t kbd_led_als_store(struct device *dev,
1685 struct device_attribute *attr,
1686 const char *buf, size_t count)
1687 {
1688 struct kbd_state state;
1689 struct kbd_state new_state;
1690 u8 setting;
1691 int ret;
1692
1693 ret = kstrtou8(buf, 10, &setting);
1694 if (ret)
1695 return ret;
1696
1697 ret = kbd_get_state(&state);
1698 if (ret)
1699 return ret;
1700
1701 new_state = state;
1702 new_state.als_setting = setting;
1703
1704 ret = kbd_set_state_safe(&new_state, &state);
1705 if (ret)
1706 return ret;
1707
1708 return count;
1709 }
1710
1711 static ssize_t kbd_led_als_show(struct device *dev,
1712 struct device_attribute *attr, char *buf)
1713 {
1714 struct kbd_state state;
1715 int ret;
1716
1717 ret = kbd_get_state(&state);
1718 if (ret)
1719 return ret;
1720
1721 return sprintf(buf, "%d\n", state.als_setting);
1722 }
1723
1724 static DEVICE_ATTR(als_setting, S_IRUGO | S_IWUSR,
1725 kbd_led_als_show, kbd_led_als_store);
1726
1727 static struct attribute *kbd_led_attrs[] = {
1728 &dev_attr_stop_timeout.attr,
1729 &dev_attr_start_triggers.attr,
1730 &dev_attr_als_setting.attr,
1731 NULL,
1732 };
1733 ATTRIBUTE_GROUPS(kbd_led);
1734
1735 static enum led_brightness kbd_led_level_get(struct led_classdev *led_cdev)
1736 {
1737 int ret;
1738 u16 num;
1739 struct kbd_state state;
1740
1741 if (kbd_get_max_level()) {
1742 ret = kbd_get_state(&state);
1743 if (ret)
1744 return 0;
1745 ret = kbd_get_level(&state);
1746 if (ret < 0)
1747 return 0;
1748 return ret;
1749 }
1750
1751 if (kbd_get_valid_token_counts()) {
1752 ret = kbd_get_first_active_token_bit();
1753 if (ret < 0)
1754 return 0;
1755 for (num = kbd_token_bits; num != 0 && ret > 0; --ret)
1756 num &= num - 1; /* clear the first bit set */
1757 if (num == 0)
1758 return 0;
1759 return ffs(num) - 1;
1760 }
1761
1762 pr_warn("Keyboard brightness level control not supported\n");
1763 return 0;
1764 }
1765
1766 static void kbd_led_level_set(struct led_classdev *led_cdev,
1767 enum led_brightness value)
1768 {
1769 struct kbd_state state;
1770 struct kbd_state new_state;
1771 u16 num;
1772
1773 if (kbd_get_max_level()) {
1774 if (kbd_get_state(&state))
1775 return;
1776 new_state = state;
1777 if (kbd_set_level(&new_state, value))
1778 return;
1779 kbd_set_state_safe(&new_state, &state);
1780 return;
1781 }
1782
1783 if (kbd_get_valid_token_counts()) {
1784 for (num = kbd_token_bits; num != 0 && value > 0; --value)
1785 num &= num - 1; /* clear the first bit set */
1786 if (num == 0)
1787 return;
1788 kbd_set_token_bit(ffs(num) - 1);
1789 return;
1790 }
1791
1792 pr_warn("Keyboard brightness level control not supported\n");
1793 }
1794
1795 static struct led_classdev kbd_led = {
1796 .name = "dell::kbd_backlight",
1797 .brightness_set = kbd_led_level_set,
1798 .brightness_get = kbd_led_level_get,
1799 .groups = kbd_led_groups,
1800 };
1801
1802 static int __init kbd_led_init(struct device *dev)
1803 {
1804 kbd_init();
1805 if (!kbd_led_present)
1806 return -ENODEV;
1807 kbd_led.max_brightness = kbd_get_max_level();
1808 if (!kbd_led.max_brightness) {
1809 kbd_led.max_brightness = kbd_get_valid_token_counts();
1810 if (kbd_led.max_brightness)
1811 kbd_led.max_brightness--;
1812 }
1813 return led_classdev_register(dev, &kbd_led);
1814 }
1815
1816 static void brightness_set_exit(struct led_classdev *led_cdev,
1817 enum led_brightness value)
1818 {
1819 /* Don't change backlight level on exit */
1820 };
1821
1822 static void kbd_led_exit(void)
1823 {
1824 if (!kbd_led_present)
1825 return;
1826 kbd_led.brightness_set = brightness_set_exit;
1827 led_classdev_unregister(&kbd_led);
1828 }
1829
1830 static int __init dell_init(void)
1831 {
1832 int max_intensity = 0;
1833 int ret;
1834
1835 if (!dmi_check_system(dell_device_table))
1836 return -ENODEV;
1837
1838 quirks = NULL;
1839 /* find if this machine support other functions */
1840 dmi_check_system(dell_quirks);
1841
1842 dmi_walk(find_tokens, NULL);
1843
1844 if (!da_tokens) {
1845 pr_info("Unable to find dmi tokens\n");
1846 return -ENODEV;
1847 }
1848
1849 ret = platform_driver_register(&platform_driver);
1850 if (ret)
1851 goto fail_platform_driver;
1852 platform_device = platform_device_alloc("dell-laptop", -1);
1853 if (!platform_device) {
1854 ret = -ENOMEM;
1855 goto fail_platform_device1;
1856 }
1857 ret = platform_device_add(platform_device);
1858 if (ret)
1859 goto fail_platform_device2;
1860
1861 /*
1862 * Allocate buffer below 4GB for SMI data--only 32-bit physical addr
1863 * is passed to SMI handler.
1864 */
1865 bufferpage = alloc_page(GFP_KERNEL | GFP_DMA32);
1866 if (!bufferpage) {
1867 ret = -ENOMEM;
1868 goto fail_buffer;
1869 }
1870 buffer = page_address(bufferpage);
1871
1872 ret = dell_setup_rfkill();
1873
1874 if (ret) {
1875 pr_warn("Unable to setup rfkill\n");
1876 goto fail_rfkill;
1877 }
1878
1879 if (quirks && quirks->touchpad_led)
1880 touchpad_led_init(&platform_device->dev);
1881
1882 kbd_led_init(&platform_device->dev);
1883
1884 dell_laptop_dir = debugfs_create_dir("dell_laptop", NULL);
1885 if (dell_laptop_dir != NULL)
1886 debugfs_create_file("rfkill", 0444, dell_laptop_dir, NULL,
1887 &dell_debugfs_fops);
1888
1889 #ifdef CONFIG_ACPI
1890 /* In the event of an ACPI backlight being available, don't
1891 * register the platform controller.
1892 */
1893 if (acpi_video_backlight_support())
1894 return 0;
1895 #endif
1896
1897 get_buffer();
1898 buffer->input[0] = find_token_location(BRIGHTNESS_TOKEN);
1899 if (buffer->input[0] != -1) {
1900 dell_send_request(buffer, 0, 2);
1901 max_intensity = buffer->output[3];
1902 }
1903 release_buffer();
1904
1905 if (max_intensity) {
1906 struct backlight_properties props;
1907 memset(&props, 0, sizeof(struct backlight_properties));
1908 props.type = BACKLIGHT_PLATFORM;
1909 props.max_brightness = max_intensity;
1910 dell_backlight_device = backlight_device_register("dell_backlight",
1911 &platform_device->dev,
1912 NULL,
1913 &dell_ops,
1914 &props);
1915
1916 if (IS_ERR(dell_backlight_device)) {
1917 ret = PTR_ERR(dell_backlight_device);
1918 dell_backlight_device = NULL;
1919 goto fail_backlight;
1920 }
1921
1922 dell_backlight_device->props.brightness =
1923 dell_get_intensity(dell_backlight_device);
1924 backlight_update_status(dell_backlight_device);
1925 }
1926
1927 return 0;
1928
1929 fail_backlight:
1930 i8042_remove_filter(dell_laptop_i8042_filter);
1931 cancel_delayed_work_sync(&dell_rfkill_work);
1932 dell_cleanup_rfkill();
1933 fail_rfkill:
1934 free_page((unsigned long)bufferpage);
1935 fail_buffer:
1936 platform_device_del(platform_device);
1937 fail_platform_device2:
1938 platform_device_put(platform_device);
1939 fail_platform_device1:
1940 platform_driver_unregister(&platform_driver);
1941 fail_platform_driver:
1942 kfree(da_tokens);
1943 return ret;
1944 }
1945
1946 static void __exit dell_exit(void)
1947 {
1948 debugfs_remove_recursive(dell_laptop_dir);
1949 if (quirks && quirks->touchpad_led)
1950 touchpad_led_exit();
1951 kbd_led_exit();
1952 i8042_remove_filter(dell_laptop_i8042_filter);
1953 cancel_delayed_work_sync(&dell_rfkill_work);
1954 backlight_device_unregister(dell_backlight_device);
1955 dell_cleanup_rfkill();
1956 if (platform_device) {
1957 platform_device_unregister(platform_device);
1958 platform_driver_unregister(&platform_driver);
1959 }
1960 kfree(da_tokens);
1961 free_page((unsigned long)buffer);
1962 }
1963
1964 module_init(dell_init);
1965 module_exit(dell_exit);
1966
1967 MODULE_AUTHOR("Matthew Garrett <mjg@redhat.com>");
1968 MODULE_AUTHOR("Gabriele Mazzotta <gabriele.mzt@gmail.com>");
1969 MODULE_AUTHOR("Pali Rohár <pali.rohar@gmail.com>");
1970 MODULE_DESCRIPTION("Dell laptop driver");
1971 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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