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
dmi_matched(const struct dmi_system_id * dmi)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 DEFINE_MUTEX(buffer_mutex);
309
310 static int hwswitch_state;
311
get_buffer(void)312 static void get_buffer(void)
313 {
314 mutex_lock(&buffer_mutex);
315 memset(buffer, 0, sizeof(struct calling_interface_buffer));
316 }
317
release_buffer(void)318 static void release_buffer(void)
319 {
320 mutex_unlock(&buffer_mutex);
321 }
322
parse_da_table(const struct dmi_header * dm)323 static void __init parse_da_table(const struct dmi_header *dm)
324 {
325 /* Final token is a terminator, so we don't want to copy it */
326 int tokens = (dm->length-11)/sizeof(struct calling_interface_token)-1;
327 struct calling_interface_token *new_da_tokens;
328 struct calling_interface_structure *table =
329 container_of(dm, struct calling_interface_structure, header);
330
331 /* 4 bytes of table header, plus 7 bytes of Dell header, plus at least
332 6 bytes of entry */
333
334 if (dm->length < 17)
335 return;
336
337 da_command_address = table->cmdIOAddress;
338 da_command_code = table->cmdIOCode;
339
340 new_da_tokens = krealloc(da_tokens, (da_num_tokens + tokens) *
341 sizeof(struct calling_interface_token),
342 GFP_KERNEL);
343
344 if (!new_da_tokens)
345 return;
346 da_tokens = new_da_tokens;
347
348 memcpy(da_tokens+da_num_tokens, table->tokens,
349 sizeof(struct calling_interface_token) * tokens);
350
351 da_num_tokens += tokens;
352 }
353
find_tokens(const struct dmi_header * dm,void * dummy)354 static void __init find_tokens(const struct dmi_header *dm, void *dummy)
355 {
356 switch (dm->type) {
357 case 0xd4: /* Indexed IO */
358 case 0xd5: /* Protected Area Type 1 */
359 case 0xd6: /* Protected Area Type 2 */
360 break;
361 case 0xda: /* Calling interface */
362 parse_da_table(dm);
363 break;
364 }
365 }
366
find_token_id(int tokenid)367 static int find_token_id(int tokenid)
368 {
369 int i;
370
371 for (i = 0; i < da_num_tokens; i++) {
372 if (da_tokens[i].tokenID == tokenid)
373 return i;
374 }
375
376 return -1;
377 }
378
find_token_location(int tokenid)379 static int find_token_location(int tokenid)
380 {
381 int id;
382
383 id = find_token_id(tokenid);
384 if (id == -1)
385 return -1;
386
387 return da_tokens[id].location;
388 }
389
390 static struct calling_interface_buffer *
dell_send_request(struct calling_interface_buffer * buffer,int class,int select)391 dell_send_request(struct calling_interface_buffer *buffer, int class,
392 int select)
393 {
394 struct smi_cmd command;
395
396 command.magic = SMI_CMD_MAGIC;
397 command.command_address = da_command_address;
398 command.command_code = da_command_code;
399 command.ebx = virt_to_phys(buffer);
400 command.ecx = 0x42534931;
401
402 buffer->class = class;
403 buffer->select = select;
404
405 dcdbas_smi_request(&command);
406
407 return buffer;
408 }
409
dell_smi_error(int value)410 static inline int dell_smi_error(int value)
411 {
412 switch (value) {
413 case 0: /* Completed successfully */
414 return 0;
415 case -1: /* Completed with error */
416 return -EIO;
417 case -2: /* Function not supported */
418 return -ENXIO;
419 default: /* Unknown error */
420 return -EINVAL;
421 }
422 }
423
424 /* Derived from information in DellWirelessCtl.cpp:
425 Class 17, select 11 is radio control. It returns an array of 32-bit values.
426
427 Input byte 0 = 0: Wireless information
428
429 result[0]: return code
430 result[1]:
431 Bit 0: Hardware switch supported
432 Bit 1: Wifi locator supported
433 Bit 2: Wifi is supported
434 Bit 3: Bluetooth is supported
435 Bit 4: WWAN is supported
436 Bit 5: Wireless keyboard supported
437 Bits 6-7: Reserved
438 Bit 8: Wifi is installed
439 Bit 9: Bluetooth is installed
440 Bit 10: WWAN is installed
441 Bits 11-15: Reserved
442 Bit 16: Hardware switch is on
443 Bit 17: Wifi is blocked
444 Bit 18: Bluetooth is blocked
445 Bit 19: WWAN is blocked
446 Bits 20-31: Reserved
447 result[2]: NVRAM size in bytes
448 result[3]: NVRAM format version number
449
450 Input byte 0 = 2: Wireless switch configuration
451 result[0]: return code
452 result[1]:
453 Bit 0: Wifi controlled by switch
454 Bit 1: Bluetooth controlled by switch
455 Bit 2: WWAN controlled by switch
456 Bits 3-6: Reserved
457 Bit 7: Wireless switch config locked
458 Bit 8: Wifi locator enabled
459 Bits 9-14: Reserved
460 Bit 15: Wifi locator setting locked
461 Bits 16-31: Reserved
462 */
463
dell_rfkill_set(void * data,bool blocked)464 static int dell_rfkill_set(void *data, bool blocked)
465 {
466 int disable = blocked ? 1 : 0;
467 unsigned long radio = (unsigned long)data;
468 int hwswitch_bit = (unsigned long)data - 1;
469
470 get_buffer();
471 dell_send_request(buffer, 17, 11);
472
473 /* If the hardware switch controls this radio, and the hardware
474 switch is disabled, always disable the radio */
475 if ((hwswitch_state & BIT(hwswitch_bit)) &&
476 !(buffer->output[1] & BIT(16)))
477 disable = 1;
478
479 buffer->input[0] = (1 | (radio<<8) | (disable << 16));
480 dell_send_request(buffer, 17, 11);
481
482 release_buffer();
483 return 0;
484 }
485
486 /* Must be called with the buffer held */
dell_rfkill_update_sw_state(struct rfkill * rfkill,int radio,int status)487 static void dell_rfkill_update_sw_state(struct rfkill *rfkill, int radio,
488 int status)
489 {
490 if (status & BIT(0)) {
491 /* Has hw-switch, sync sw_state to BIOS */
492 int block = rfkill_blocked(rfkill);
493 buffer->input[0] = (1 | (radio << 8) | (block << 16));
494 dell_send_request(buffer, 17, 11);
495 } else {
496 /* No hw-switch, sync BIOS state to sw_state */
497 rfkill_set_sw_state(rfkill, !!(status & BIT(radio + 16)));
498 }
499 }
500
dell_rfkill_update_hw_state(struct rfkill * rfkill,int radio,int status)501 static void dell_rfkill_update_hw_state(struct rfkill *rfkill, int radio,
502 int status)
503 {
504 if (hwswitch_state & (BIT(radio - 1)))
505 rfkill_set_hw_state(rfkill, !(status & BIT(16)));
506 }
507
dell_rfkill_query(struct rfkill * rfkill,void * data)508 static void dell_rfkill_query(struct rfkill *rfkill, void *data)
509 {
510 int status;
511
512 get_buffer();
513 dell_send_request(buffer, 17, 11);
514 status = buffer->output[1];
515
516 dell_rfkill_update_hw_state(rfkill, (unsigned long)data, status);
517
518 release_buffer();
519 }
520
521 static const struct rfkill_ops dell_rfkill_ops = {
522 .set_block = dell_rfkill_set,
523 .query = dell_rfkill_query,
524 };
525
526 static struct dentry *dell_laptop_dir;
527
dell_debugfs_show(struct seq_file * s,void * data)528 static int dell_debugfs_show(struct seq_file *s, void *data)
529 {
530 int status;
531
532 get_buffer();
533 dell_send_request(buffer, 17, 11);
534 status = buffer->output[1];
535 release_buffer();
536
537 seq_printf(s, "status:\t0x%X\n", status);
538 seq_printf(s, "Bit 0 : Hardware switch supported: %lu\n",
539 status & BIT(0));
540 seq_printf(s, "Bit 1 : Wifi locator supported: %lu\n",
541 (status & BIT(1)) >> 1);
542 seq_printf(s, "Bit 2 : Wifi is supported: %lu\n",
543 (status & BIT(2)) >> 2);
544 seq_printf(s, "Bit 3 : Bluetooth is supported: %lu\n",
545 (status & BIT(3)) >> 3);
546 seq_printf(s, "Bit 4 : WWAN is supported: %lu\n",
547 (status & BIT(4)) >> 4);
548 seq_printf(s, "Bit 5 : Wireless keyboard supported: %lu\n",
549 (status & BIT(5)) >> 5);
550 seq_printf(s, "Bit 8 : Wifi is installed: %lu\n",
551 (status & BIT(8)) >> 8);
552 seq_printf(s, "Bit 9 : Bluetooth is installed: %lu\n",
553 (status & BIT(9)) >> 9);
554 seq_printf(s, "Bit 10: WWAN is installed: %lu\n",
555 (status & BIT(10)) >> 10);
556 seq_printf(s, "Bit 16: Hardware switch is on: %lu\n",
557 (status & BIT(16)) >> 16);
558 seq_printf(s, "Bit 17: Wifi is blocked: %lu\n",
559 (status & BIT(17)) >> 17);
560 seq_printf(s, "Bit 18: Bluetooth is blocked: %lu\n",
561 (status & BIT(18)) >> 18);
562 seq_printf(s, "Bit 19: WWAN is blocked: %lu\n",
563 (status & BIT(19)) >> 19);
564
565 seq_printf(s, "\nhwswitch_state:\t0x%X\n", hwswitch_state);
566 seq_printf(s, "Bit 0 : Wifi controlled by switch: %lu\n",
567 hwswitch_state & BIT(0));
568 seq_printf(s, "Bit 1 : Bluetooth controlled by switch: %lu\n",
569 (hwswitch_state & BIT(1)) >> 1);
570 seq_printf(s, "Bit 2 : WWAN controlled by switch: %lu\n",
571 (hwswitch_state & BIT(2)) >> 2);
572 seq_printf(s, "Bit 7 : Wireless switch config locked: %lu\n",
573 (hwswitch_state & BIT(7)) >> 7);
574 seq_printf(s, "Bit 8 : Wifi locator enabled: %lu\n",
575 (hwswitch_state & BIT(8)) >> 8);
576 seq_printf(s, "Bit 15: Wifi locator setting locked: %lu\n",
577 (hwswitch_state & BIT(15)) >> 15);
578
579 return 0;
580 }
581
dell_debugfs_open(struct inode * inode,struct file * file)582 static int dell_debugfs_open(struct inode *inode, struct file *file)
583 {
584 return single_open(file, dell_debugfs_show, inode->i_private);
585 }
586
587 static const struct file_operations dell_debugfs_fops = {
588 .owner = THIS_MODULE,
589 .open = dell_debugfs_open,
590 .read = seq_read,
591 .llseek = seq_lseek,
592 .release = single_release,
593 };
594
dell_update_rfkill(struct work_struct * ignored)595 static void dell_update_rfkill(struct work_struct *ignored)
596 {
597 int status;
598
599 get_buffer();
600 dell_send_request(buffer, 17, 11);
601 status = buffer->output[1];
602
603 if (wifi_rfkill) {
604 dell_rfkill_update_hw_state(wifi_rfkill, 1, status);
605 dell_rfkill_update_sw_state(wifi_rfkill, 1, status);
606 }
607 if (bluetooth_rfkill) {
608 dell_rfkill_update_hw_state(bluetooth_rfkill, 2, status);
609 dell_rfkill_update_sw_state(bluetooth_rfkill, 2, status);
610 }
611 if (wwan_rfkill) {
612 dell_rfkill_update_hw_state(wwan_rfkill, 3, status);
613 dell_rfkill_update_sw_state(wwan_rfkill, 3, status);
614 }
615
616 release_buffer();
617 }
618 static DECLARE_DELAYED_WORK(dell_rfkill_work, dell_update_rfkill);
619
dell_laptop_i8042_filter(unsigned char data,unsigned char str,struct serio * port)620 static bool dell_laptop_i8042_filter(unsigned char data, unsigned char str,
621 struct serio *port)
622 {
623 static bool extended;
624
625 if (str & I8042_STR_AUXDATA)
626 return false;
627
628 if (unlikely(data == 0xe0)) {
629 extended = true;
630 return false;
631 } else if (unlikely(extended)) {
632 switch (data) {
633 case 0x8:
634 schedule_delayed_work(&dell_rfkill_work,
635 round_jiffies_relative(HZ / 4));
636 break;
637 }
638 extended = false;
639 }
640
641 return false;
642 }
643
dell_setup_rfkill(void)644 static int __init dell_setup_rfkill(void)
645 {
646 int status, ret, whitelisted;
647 const char *product;
648
649 /*
650 * rfkill support causes trouble on various models, mostly Inspirons.
651 * So we whitelist certain series, and don't support rfkill on others.
652 */
653 whitelisted = 0;
654 product = dmi_get_system_info(DMI_PRODUCT_NAME);
655 if (product && (strncmp(product, "Latitude", 8) == 0 ||
656 strncmp(product, "Precision", 9) == 0))
657 whitelisted = 1;
658 if (!force_rfkill && !whitelisted)
659 return 0;
660
661 get_buffer();
662 dell_send_request(buffer, 17, 11);
663 status = buffer->output[1];
664 buffer->input[0] = 0x2;
665 dell_send_request(buffer, 17, 11);
666 hwswitch_state = buffer->output[1];
667 release_buffer();
668
669 if (!(status & BIT(0))) {
670 if (force_rfkill) {
671 /* No hwsitch, clear all hw-controlled bits */
672 hwswitch_state &= ~7;
673 } else {
674 /* rfkill is only tested on laptops with a hwswitch */
675 return 0;
676 }
677 }
678
679 if ((status & (1<<2|1<<8)) == (1<<2|1<<8)) {
680 wifi_rfkill = rfkill_alloc("dell-wifi", &platform_device->dev,
681 RFKILL_TYPE_WLAN,
682 &dell_rfkill_ops, (void *) 1);
683 if (!wifi_rfkill) {
684 ret = -ENOMEM;
685 goto err_wifi;
686 }
687 ret = rfkill_register(wifi_rfkill);
688 if (ret)
689 goto err_wifi;
690 }
691
692 if ((status & (1<<3|1<<9)) == (1<<3|1<<9)) {
693 bluetooth_rfkill = rfkill_alloc("dell-bluetooth",
694 &platform_device->dev,
695 RFKILL_TYPE_BLUETOOTH,
696 &dell_rfkill_ops, (void *) 2);
697 if (!bluetooth_rfkill) {
698 ret = -ENOMEM;
699 goto err_bluetooth;
700 }
701 ret = rfkill_register(bluetooth_rfkill);
702 if (ret)
703 goto err_bluetooth;
704 }
705
706 if ((status & (1<<4|1<<10)) == (1<<4|1<<10)) {
707 wwan_rfkill = rfkill_alloc("dell-wwan",
708 &platform_device->dev,
709 RFKILL_TYPE_WWAN,
710 &dell_rfkill_ops, (void *) 3);
711 if (!wwan_rfkill) {
712 ret = -ENOMEM;
713 goto err_wwan;
714 }
715 ret = rfkill_register(wwan_rfkill);
716 if (ret)
717 goto err_wwan;
718 }
719
720 ret = i8042_install_filter(dell_laptop_i8042_filter);
721 if (ret) {
722 pr_warn("Unable to install key filter\n");
723 goto err_filter;
724 }
725
726 return 0;
727 err_filter:
728 if (wwan_rfkill)
729 rfkill_unregister(wwan_rfkill);
730 err_wwan:
731 rfkill_destroy(wwan_rfkill);
732 if (bluetooth_rfkill)
733 rfkill_unregister(bluetooth_rfkill);
734 err_bluetooth:
735 rfkill_destroy(bluetooth_rfkill);
736 if (wifi_rfkill)
737 rfkill_unregister(wifi_rfkill);
738 err_wifi:
739 rfkill_destroy(wifi_rfkill);
740
741 return ret;
742 }
743
dell_cleanup_rfkill(void)744 static void dell_cleanup_rfkill(void)
745 {
746 if (wifi_rfkill) {
747 rfkill_unregister(wifi_rfkill);
748 rfkill_destroy(wifi_rfkill);
749 }
750 if (bluetooth_rfkill) {
751 rfkill_unregister(bluetooth_rfkill);
752 rfkill_destroy(bluetooth_rfkill);
753 }
754 if (wwan_rfkill) {
755 rfkill_unregister(wwan_rfkill);
756 rfkill_destroy(wwan_rfkill);
757 }
758 }
759
dell_send_intensity(struct backlight_device * bd)760 static int dell_send_intensity(struct backlight_device *bd)
761 {
762 int ret = 0;
763
764 get_buffer();
765 buffer->input[0] = find_token_location(BRIGHTNESS_TOKEN);
766 buffer->input[1] = bd->props.brightness;
767
768 if (buffer->input[0] == -1) {
769 ret = -ENODEV;
770 goto out;
771 }
772
773 if (power_supply_is_system_supplied() > 0)
774 dell_send_request(buffer, 1, 2);
775 else
776 dell_send_request(buffer, 1, 1);
777
778 out:
779 release_buffer();
780 return ret;
781 }
782
dell_get_intensity(struct backlight_device * bd)783 static int dell_get_intensity(struct backlight_device *bd)
784 {
785 int ret = 0;
786
787 get_buffer();
788 buffer->input[0] = find_token_location(BRIGHTNESS_TOKEN);
789
790 if (buffer->input[0] == -1) {
791 ret = -ENODEV;
792 goto out;
793 }
794
795 if (power_supply_is_system_supplied() > 0)
796 dell_send_request(buffer, 0, 2);
797 else
798 dell_send_request(buffer, 0, 1);
799
800 ret = buffer->output[1];
801
802 out:
803 release_buffer();
804 return ret;
805 }
806
807 static const struct backlight_ops dell_ops = {
808 .get_brightness = dell_get_intensity,
809 .update_status = dell_send_intensity,
810 };
811
touchpad_led_on(void)812 static void touchpad_led_on(void)
813 {
814 int command = 0x97;
815 char data = 1;
816 i8042_command(&data, command | 1 << 12);
817 }
818
touchpad_led_off(void)819 static void touchpad_led_off(void)
820 {
821 int command = 0x97;
822 char data = 2;
823 i8042_command(&data, command | 1 << 12);
824 }
825
touchpad_led_set(struct led_classdev * led_cdev,enum led_brightness value)826 static void touchpad_led_set(struct led_classdev *led_cdev,
827 enum led_brightness value)
828 {
829 if (value > 0)
830 touchpad_led_on();
831 else
832 touchpad_led_off();
833 }
834
835 static struct led_classdev touchpad_led = {
836 .name = "dell-laptop::touchpad",
837 .brightness_set = touchpad_led_set,
838 .flags = LED_CORE_SUSPENDRESUME,
839 };
840
touchpad_led_init(struct device * dev)841 static int __init touchpad_led_init(struct device *dev)
842 {
843 return led_classdev_register(dev, &touchpad_led);
844 }
845
touchpad_led_exit(void)846 static void touchpad_led_exit(void)
847 {
848 led_classdev_unregister(&touchpad_led);
849 }
850
851 /*
852 * Derived from information in smbios-keyboard-ctl:
853 *
854 * cbClass 4
855 * cbSelect 11
856 * Keyboard illumination
857 * cbArg1 determines the function to be performed
858 *
859 * cbArg1 0x0 = Get Feature Information
860 * cbRES1 Standard return codes (0, -1, -2)
861 * cbRES2, word0 Bitmap of user-selectable modes
862 * bit 0 Always off (All systems)
863 * bit 1 Always on (Travis ATG, Siberia)
864 * bit 2 Auto: ALS-based On; ALS-based Off (Travis ATG)
865 * bit 3 Auto: ALS- and input-activity-based On; input-activity based Off
866 * bit 4 Auto: Input-activity-based On; input-activity based Off
867 * bit 5 Auto: Input-activity-based On (illumination level 25%); input-activity based Off
868 * bit 6 Auto: Input-activity-based On (illumination level 50%); input-activity based Off
869 * bit 7 Auto: Input-activity-based On (illumination level 75%); input-activity based Off
870 * bit 8 Auto: Input-activity-based On (illumination level 100%); input-activity based Off
871 * bits 9-15 Reserved for future use
872 * cbRES2, byte2 Reserved for future use
873 * cbRES2, byte3 Keyboard illumination type
874 * 0 Reserved
875 * 1 Tasklight
876 * 2 Backlight
877 * 3-255 Reserved for future use
878 * cbRES3, byte0 Supported auto keyboard illumination trigger bitmap.
879 * bit 0 Any keystroke
880 * bit 1 Touchpad activity
881 * bit 2 Pointing stick
882 * bit 3 Any mouse
883 * bits 4-7 Reserved for future use
884 * cbRES3, byte1 Supported timeout unit bitmap
885 * bit 0 Seconds
886 * bit 1 Minutes
887 * bit 2 Hours
888 * bit 3 Days
889 * bits 4-7 Reserved for future use
890 * cbRES3, byte2 Number of keyboard light brightness levels
891 * cbRES4, byte0 Maximum acceptable seconds value (0 if seconds not supported).
892 * cbRES4, byte1 Maximum acceptable minutes value (0 if minutes not supported).
893 * cbRES4, byte2 Maximum acceptable hours value (0 if hours not supported).
894 * cbRES4, byte3 Maximum acceptable days value (0 if days not supported)
895 *
896 * cbArg1 0x1 = Get Current State
897 * cbRES1 Standard return codes (0, -1, -2)
898 * cbRES2, word0 Bitmap of current mode state
899 * bit 0 Always off (All systems)
900 * bit 1 Always on (Travis ATG, Siberia)
901 * bit 2 Auto: ALS-based On; ALS-based Off (Travis ATG)
902 * bit 3 Auto: ALS- and input-activity-based On; input-activity based Off
903 * bit 4 Auto: Input-activity-based On; input-activity based Off
904 * bit 5 Auto: Input-activity-based On (illumination level 25%); input-activity based Off
905 * bit 6 Auto: Input-activity-based On (illumination level 50%); input-activity based Off
906 * bit 7 Auto: Input-activity-based On (illumination level 75%); input-activity based Off
907 * bit 8 Auto: Input-activity-based On (illumination level 100%); input-activity based Off
908 * bits 9-15 Reserved for future use
909 * Note: Only One bit can be set
910 * cbRES2, byte2 Currently active auto keyboard illumination triggers.
911 * bit 0 Any keystroke
912 * bit 1 Touchpad activity
913 * bit 2 Pointing stick
914 * bit 3 Any mouse
915 * bits 4-7 Reserved for future use
916 * cbRES2, byte3 Current Timeout
917 * bits 7:6 Timeout units indicator:
918 * 00b Seconds
919 * 01b Minutes
920 * 10b Hours
921 * 11b Days
922 * bits 5:0 Timeout value (0-63) in sec/min/hr/day
923 * NOTE: A value of 0 means always on (no timeout) if any bits of RES3 byte
924 * are set upon return from the [Get feature information] call.
925 * cbRES3, byte0 Current setting of ALS value that turns the light on or off.
926 * cbRES3, byte1 Current ALS reading
927 * cbRES3, byte2 Current keyboard light level.
928 *
929 * cbArg1 0x2 = Set New State
930 * cbRES1 Standard return codes (0, -1, -2)
931 * cbArg2, word0 Bitmap of current mode state
932 * bit 0 Always off (All systems)
933 * bit 1 Always on (Travis ATG, Siberia)
934 * bit 2 Auto: ALS-based On; ALS-based Off (Travis ATG)
935 * bit 3 Auto: ALS- and input-activity-based On; input-activity based Off
936 * bit 4 Auto: Input-activity-based On; input-activity based Off
937 * bit 5 Auto: Input-activity-based On (illumination level 25%); input-activity based Off
938 * bit 6 Auto: Input-activity-based On (illumination level 50%); input-activity based Off
939 * bit 7 Auto: Input-activity-based On (illumination level 75%); input-activity based Off
940 * bit 8 Auto: Input-activity-based On (illumination level 100%); input-activity based Off
941 * bits 9-15 Reserved for future use
942 * Note: Only One bit can be set
943 * cbArg2, byte2 Desired auto keyboard illumination triggers. Must remain inactive to allow
944 * keyboard to turn off automatically.
945 * bit 0 Any keystroke
946 * bit 1 Touchpad activity
947 * bit 2 Pointing stick
948 * bit 3 Any mouse
949 * bits 4-7 Reserved for future use
950 * cbArg2, byte3 Desired Timeout
951 * bits 7:6 Timeout units indicator:
952 * 00b Seconds
953 * 01b Minutes
954 * 10b Hours
955 * 11b Days
956 * bits 5:0 Timeout value (0-63) in sec/min/hr/day
957 * cbArg3, byte0 Desired setting of ALS value that turns the light on or off.
958 * cbArg3, byte2 Desired keyboard light level.
959 */
960
961
962 enum kbd_timeout_unit {
963 KBD_TIMEOUT_SECONDS = 0,
964 KBD_TIMEOUT_MINUTES,
965 KBD_TIMEOUT_HOURS,
966 KBD_TIMEOUT_DAYS,
967 };
968
969 enum kbd_mode_bit {
970 KBD_MODE_BIT_OFF = 0,
971 KBD_MODE_BIT_ON,
972 KBD_MODE_BIT_ALS,
973 KBD_MODE_BIT_TRIGGER_ALS,
974 KBD_MODE_BIT_TRIGGER,
975 KBD_MODE_BIT_TRIGGER_25,
976 KBD_MODE_BIT_TRIGGER_50,
977 KBD_MODE_BIT_TRIGGER_75,
978 KBD_MODE_BIT_TRIGGER_100,
979 };
980
981 #define kbd_is_als_mode_bit(bit) \
982 ((bit) == KBD_MODE_BIT_ALS || (bit) == KBD_MODE_BIT_TRIGGER_ALS)
983 #define kbd_is_trigger_mode_bit(bit) \
984 ((bit) >= KBD_MODE_BIT_TRIGGER_ALS && (bit) <= KBD_MODE_BIT_TRIGGER_100)
985 #define kbd_is_level_mode_bit(bit) \
986 ((bit) >= KBD_MODE_BIT_TRIGGER_25 && (bit) <= KBD_MODE_BIT_TRIGGER_100)
987
988 struct kbd_info {
989 u16 modes;
990 u8 type;
991 u8 triggers;
992 u8 levels;
993 u8 seconds;
994 u8 minutes;
995 u8 hours;
996 u8 days;
997 };
998
999 struct kbd_state {
1000 u8 mode_bit;
1001 u8 triggers;
1002 u8 timeout_value;
1003 u8 timeout_unit;
1004 u8 als_setting;
1005 u8 als_value;
1006 u8 level;
1007 };
1008
1009 static const int kbd_tokens[] = {
1010 KBD_LED_OFF_TOKEN,
1011 KBD_LED_AUTO_25_TOKEN,
1012 KBD_LED_AUTO_50_TOKEN,
1013 KBD_LED_AUTO_75_TOKEN,
1014 KBD_LED_AUTO_100_TOKEN,
1015 KBD_LED_ON_TOKEN,
1016 };
1017
1018 static u16 kbd_token_bits;
1019
1020 static struct kbd_info kbd_info;
1021 static bool kbd_als_supported;
1022 static bool kbd_triggers_supported;
1023
1024 static u8 kbd_mode_levels[16];
1025 static int kbd_mode_levels_count;
1026
1027 static u8 kbd_previous_level;
1028 static u8 kbd_previous_mode_bit;
1029
1030 static bool kbd_led_present;
1031
1032 /*
1033 * NOTE: there are three ways to set the keyboard backlight level.
1034 * First, via kbd_state.mode_bit (assigning KBD_MODE_BIT_TRIGGER_* value).
1035 * Second, via kbd_state.level (assigning numerical value <= kbd_info.levels).
1036 * Third, via SMBIOS tokens (KBD_LED_* in kbd_tokens)
1037 *
1038 * There are laptops which support only one of these methods. If we want to
1039 * support as many machines as possible we need to implement all three methods.
1040 * The first two methods use the kbd_state structure. The third uses SMBIOS
1041 * tokens. If kbd_info.levels == 0, the machine does not support setting the
1042 * keyboard backlight level via kbd_state.level.
1043 */
1044
kbd_get_info(struct kbd_info * info)1045 static int kbd_get_info(struct kbd_info *info)
1046 {
1047 u8 units;
1048 int ret;
1049
1050 get_buffer();
1051
1052 buffer->input[0] = 0x0;
1053 dell_send_request(buffer, 4, 11);
1054 ret = buffer->output[0];
1055
1056 if (ret) {
1057 ret = dell_smi_error(ret);
1058 goto out;
1059 }
1060
1061 info->modes = buffer->output[1] & 0xFFFF;
1062 info->type = (buffer->output[1] >> 24) & 0xFF;
1063 info->triggers = buffer->output[2] & 0xFF;
1064 units = (buffer->output[2] >> 8) & 0xFF;
1065 info->levels = (buffer->output[2] >> 16) & 0xFF;
1066
1067 if (units & BIT(0))
1068 info->seconds = (buffer->output[3] >> 0) & 0xFF;
1069 if (units & BIT(1))
1070 info->minutes = (buffer->output[3] >> 8) & 0xFF;
1071 if (units & BIT(2))
1072 info->hours = (buffer->output[3] >> 16) & 0xFF;
1073 if (units & BIT(3))
1074 info->days = (buffer->output[3] >> 24) & 0xFF;
1075
1076 out:
1077 release_buffer();
1078 return ret;
1079 }
1080
kbd_get_max_level(void)1081 static unsigned int kbd_get_max_level(void)
1082 {
1083 if (kbd_info.levels != 0)
1084 return kbd_info.levels;
1085 if (kbd_mode_levels_count > 0)
1086 return kbd_mode_levels_count - 1;
1087 return 0;
1088 }
1089
kbd_get_level(struct kbd_state * state)1090 static int kbd_get_level(struct kbd_state *state)
1091 {
1092 int i;
1093
1094 if (kbd_info.levels != 0)
1095 return state->level;
1096
1097 if (kbd_mode_levels_count > 0) {
1098 for (i = 0; i < kbd_mode_levels_count; ++i)
1099 if (kbd_mode_levels[i] == state->mode_bit)
1100 return i;
1101 return 0;
1102 }
1103
1104 return -EINVAL;
1105 }
1106
kbd_set_level(struct kbd_state * state,u8 level)1107 static int kbd_set_level(struct kbd_state *state, u8 level)
1108 {
1109 if (kbd_info.levels != 0) {
1110 if (level != 0)
1111 kbd_previous_level = level;
1112 if (state->level == level)
1113 return 0;
1114 state->level = level;
1115 if (level != 0 && state->mode_bit == KBD_MODE_BIT_OFF)
1116 state->mode_bit = kbd_previous_mode_bit;
1117 else if (level == 0 && state->mode_bit != KBD_MODE_BIT_OFF) {
1118 kbd_previous_mode_bit = state->mode_bit;
1119 state->mode_bit = KBD_MODE_BIT_OFF;
1120 }
1121 return 0;
1122 }
1123
1124 if (kbd_mode_levels_count > 0 && level < kbd_mode_levels_count) {
1125 if (level != 0)
1126 kbd_previous_level = level;
1127 state->mode_bit = kbd_mode_levels[level];
1128 return 0;
1129 }
1130
1131 return -EINVAL;
1132 }
1133
kbd_get_state(struct kbd_state * state)1134 static int kbd_get_state(struct kbd_state *state)
1135 {
1136 int ret;
1137
1138 get_buffer();
1139
1140 buffer->input[0] = 0x1;
1141 dell_send_request(buffer, 4, 11);
1142 ret = buffer->output[0];
1143
1144 if (ret) {
1145 ret = dell_smi_error(ret);
1146 goto out;
1147 }
1148
1149 state->mode_bit = ffs(buffer->output[1] & 0xFFFF);
1150 if (state->mode_bit != 0)
1151 state->mode_bit--;
1152
1153 state->triggers = (buffer->output[1] >> 16) & 0xFF;
1154 state->timeout_value = (buffer->output[1] >> 24) & 0x3F;
1155 state->timeout_unit = (buffer->output[1] >> 30) & 0x3;
1156 state->als_setting = buffer->output[2] & 0xFF;
1157 state->als_value = (buffer->output[2] >> 8) & 0xFF;
1158 state->level = (buffer->output[2] >> 16) & 0xFF;
1159
1160 out:
1161 release_buffer();
1162 return ret;
1163 }
1164
kbd_set_state(struct kbd_state * state)1165 static int kbd_set_state(struct kbd_state *state)
1166 {
1167 int ret;
1168
1169 get_buffer();
1170 buffer->input[0] = 0x2;
1171 buffer->input[1] = BIT(state->mode_bit) & 0xFFFF;
1172 buffer->input[1] |= (state->triggers & 0xFF) << 16;
1173 buffer->input[1] |= (state->timeout_value & 0x3F) << 24;
1174 buffer->input[1] |= (state->timeout_unit & 0x3) << 30;
1175 buffer->input[2] = state->als_setting & 0xFF;
1176 buffer->input[2] |= (state->level & 0xFF) << 16;
1177 dell_send_request(buffer, 4, 11);
1178 ret = buffer->output[0];
1179 release_buffer();
1180
1181 return dell_smi_error(ret);
1182 }
1183
kbd_set_state_safe(struct kbd_state * state,struct kbd_state * old)1184 static int kbd_set_state_safe(struct kbd_state *state, struct kbd_state *old)
1185 {
1186 int ret;
1187
1188 ret = kbd_set_state(state);
1189 if (ret == 0)
1190 return 0;
1191
1192 /*
1193 * When setting the new state fails,try to restore the previous one.
1194 * This is needed on some machines where BIOS sets a default state when
1195 * setting a new state fails. This default state could be all off.
1196 */
1197
1198 if (kbd_set_state(old))
1199 pr_err("Setting old previous keyboard state failed\n");
1200
1201 return ret;
1202 }
1203
kbd_set_token_bit(u8 bit)1204 static int kbd_set_token_bit(u8 bit)
1205 {
1206 int id;
1207 int ret;
1208
1209 if (bit >= ARRAY_SIZE(kbd_tokens))
1210 return -EINVAL;
1211
1212 id = find_token_id(kbd_tokens[bit]);
1213 if (id == -1)
1214 return -EINVAL;
1215
1216 get_buffer();
1217 buffer->input[0] = da_tokens[id].location;
1218 buffer->input[1] = da_tokens[id].value;
1219 dell_send_request(buffer, 1, 0);
1220 ret = buffer->output[0];
1221 release_buffer();
1222
1223 return dell_smi_error(ret);
1224 }
1225
kbd_get_token_bit(u8 bit)1226 static int kbd_get_token_bit(u8 bit)
1227 {
1228 int id;
1229 int ret;
1230 int val;
1231
1232 if (bit >= ARRAY_SIZE(kbd_tokens))
1233 return -EINVAL;
1234
1235 id = find_token_id(kbd_tokens[bit]);
1236 if (id == -1)
1237 return -EINVAL;
1238
1239 get_buffer();
1240 buffer->input[0] = da_tokens[id].location;
1241 dell_send_request(buffer, 0, 0);
1242 ret = buffer->output[0];
1243 val = buffer->output[1];
1244 release_buffer();
1245
1246 if (ret)
1247 return dell_smi_error(ret);
1248
1249 return (val == da_tokens[id].value);
1250 }
1251
kbd_get_first_active_token_bit(void)1252 static int kbd_get_first_active_token_bit(void)
1253 {
1254 int i;
1255 int ret;
1256
1257 for (i = 0; i < ARRAY_SIZE(kbd_tokens); ++i) {
1258 ret = kbd_get_token_bit(i);
1259 if (ret == 1)
1260 return i;
1261 }
1262
1263 return ret;
1264 }
1265
kbd_get_valid_token_counts(void)1266 static int kbd_get_valid_token_counts(void)
1267 {
1268 return hweight16(kbd_token_bits);
1269 }
1270
kbd_init_info(void)1271 static inline int kbd_init_info(void)
1272 {
1273 struct kbd_state state;
1274 int ret;
1275 int i;
1276
1277 ret = kbd_get_info(&kbd_info);
1278 if (ret)
1279 return ret;
1280
1281 kbd_get_state(&state);
1282
1283 /* NOTE: timeout value is stored in 6 bits so max value is 63 */
1284 if (kbd_info.seconds > 63)
1285 kbd_info.seconds = 63;
1286 if (kbd_info.minutes > 63)
1287 kbd_info.minutes = 63;
1288 if (kbd_info.hours > 63)
1289 kbd_info.hours = 63;
1290 if (kbd_info.days > 63)
1291 kbd_info.days = 63;
1292
1293 /* NOTE: On tested machines ON mode did not work and caused
1294 * problems (turned backlight off) so do not use it
1295 */
1296 kbd_info.modes &= ~BIT(KBD_MODE_BIT_ON);
1297
1298 kbd_previous_level = kbd_get_level(&state);
1299 kbd_previous_mode_bit = state.mode_bit;
1300
1301 if (kbd_previous_level == 0 && kbd_get_max_level() != 0)
1302 kbd_previous_level = 1;
1303
1304 if (kbd_previous_mode_bit == KBD_MODE_BIT_OFF) {
1305 kbd_previous_mode_bit =
1306 ffs(kbd_info.modes & ~BIT(KBD_MODE_BIT_OFF));
1307 if (kbd_previous_mode_bit != 0)
1308 kbd_previous_mode_bit--;
1309 }
1310
1311 if (kbd_info.modes & (BIT(KBD_MODE_BIT_ALS) |
1312 BIT(KBD_MODE_BIT_TRIGGER_ALS)))
1313 kbd_als_supported = true;
1314
1315 if (kbd_info.modes & (
1316 BIT(KBD_MODE_BIT_TRIGGER_ALS) | BIT(KBD_MODE_BIT_TRIGGER) |
1317 BIT(KBD_MODE_BIT_TRIGGER_25) | BIT(KBD_MODE_BIT_TRIGGER_50) |
1318 BIT(KBD_MODE_BIT_TRIGGER_75) | BIT(KBD_MODE_BIT_TRIGGER_100)
1319 ))
1320 kbd_triggers_supported = true;
1321
1322 /* kbd_mode_levels[0] is reserved, see below */
1323 for (i = 0; i < 16; ++i)
1324 if (kbd_is_level_mode_bit(i) && (BIT(i) & kbd_info.modes))
1325 kbd_mode_levels[1 + kbd_mode_levels_count++] = i;
1326
1327 /*
1328 * Find the first supported mode and assign to kbd_mode_levels[0].
1329 * This should be 0 (off), but we cannot depend on the BIOS to
1330 * support 0.
1331 */
1332 if (kbd_mode_levels_count > 0) {
1333 for (i = 0; i < 16; ++i) {
1334 if (BIT(i) & kbd_info.modes) {
1335 kbd_mode_levels[0] = i;
1336 break;
1337 }
1338 }
1339 kbd_mode_levels_count++;
1340 }
1341
1342 return 0;
1343
1344 }
1345
kbd_init_tokens(void)1346 static inline void kbd_init_tokens(void)
1347 {
1348 int i;
1349
1350 for (i = 0; i < ARRAY_SIZE(kbd_tokens); ++i)
1351 if (find_token_id(kbd_tokens[i]) != -1)
1352 kbd_token_bits |= BIT(i);
1353 }
1354
kbd_init(void)1355 static void kbd_init(void)
1356 {
1357 int ret;
1358
1359 ret = kbd_init_info();
1360 kbd_init_tokens();
1361
1362 if (kbd_token_bits != 0 || ret == 0)
1363 kbd_led_present = true;
1364 }
1365
kbd_led_timeout_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)1366 static ssize_t kbd_led_timeout_store(struct device *dev,
1367 struct device_attribute *attr,
1368 const char *buf, size_t count)
1369 {
1370 struct kbd_state new_state;
1371 struct kbd_state state;
1372 bool convert;
1373 int value;
1374 int ret;
1375 char ch;
1376 u8 unit;
1377 int i;
1378
1379 ret = sscanf(buf, "%d %c", &value, &ch);
1380 if (ret < 1)
1381 return -EINVAL;
1382 else if (ret == 1)
1383 ch = 's';
1384
1385 if (value < 0)
1386 return -EINVAL;
1387
1388 convert = false;
1389
1390 switch (ch) {
1391 case 's':
1392 if (value > kbd_info.seconds)
1393 convert = true;
1394 unit = KBD_TIMEOUT_SECONDS;
1395 break;
1396 case 'm':
1397 if (value > kbd_info.minutes)
1398 convert = true;
1399 unit = KBD_TIMEOUT_MINUTES;
1400 break;
1401 case 'h':
1402 if (value > kbd_info.hours)
1403 convert = true;
1404 unit = KBD_TIMEOUT_HOURS;
1405 break;
1406 case 'd':
1407 if (value > kbd_info.days)
1408 convert = true;
1409 unit = KBD_TIMEOUT_DAYS;
1410 break;
1411 default:
1412 return -EINVAL;
1413 }
1414
1415 if (quirks && quirks->needs_kbd_timeouts)
1416 convert = true;
1417
1418 if (convert) {
1419 /* Convert value from current units to seconds */
1420 switch (unit) {
1421 case KBD_TIMEOUT_DAYS:
1422 value *= 24;
1423 case KBD_TIMEOUT_HOURS:
1424 value *= 60;
1425 case KBD_TIMEOUT_MINUTES:
1426 value *= 60;
1427 unit = KBD_TIMEOUT_SECONDS;
1428 }
1429
1430 if (quirks && quirks->needs_kbd_timeouts) {
1431 for (i = 0; quirks->kbd_timeouts[i] != -1; i++) {
1432 if (value <= quirks->kbd_timeouts[i]) {
1433 value = quirks->kbd_timeouts[i];
1434 break;
1435 }
1436 }
1437 }
1438
1439 if (value <= kbd_info.seconds && kbd_info.seconds) {
1440 unit = KBD_TIMEOUT_SECONDS;
1441 } else if (value / 60 <= kbd_info.minutes && kbd_info.minutes) {
1442 value /= 60;
1443 unit = KBD_TIMEOUT_MINUTES;
1444 } else if (value / (60 * 60) <= kbd_info.hours && kbd_info.hours) {
1445 value /= (60 * 60);
1446 unit = KBD_TIMEOUT_HOURS;
1447 } else if (value / (60 * 60 * 24) <= kbd_info.days && kbd_info.days) {
1448 value /= (60 * 60 * 24);
1449 unit = KBD_TIMEOUT_DAYS;
1450 } else {
1451 return -EINVAL;
1452 }
1453 }
1454
1455 ret = kbd_get_state(&state);
1456 if (ret)
1457 return ret;
1458
1459 new_state = state;
1460 new_state.timeout_value = value;
1461 new_state.timeout_unit = unit;
1462
1463 ret = kbd_set_state_safe(&new_state, &state);
1464 if (ret)
1465 return ret;
1466
1467 return count;
1468 }
1469
kbd_led_timeout_show(struct device * dev,struct device_attribute * attr,char * buf)1470 static ssize_t kbd_led_timeout_show(struct device *dev,
1471 struct device_attribute *attr, char *buf)
1472 {
1473 struct kbd_state state;
1474 int ret;
1475 int len;
1476
1477 ret = kbd_get_state(&state);
1478 if (ret)
1479 return ret;
1480
1481 len = sprintf(buf, "%d", state.timeout_value);
1482
1483 switch (state.timeout_unit) {
1484 case KBD_TIMEOUT_SECONDS:
1485 return len + sprintf(buf+len, "s\n");
1486 case KBD_TIMEOUT_MINUTES:
1487 return len + sprintf(buf+len, "m\n");
1488 case KBD_TIMEOUT_HOURS:
1489 return len + sprintf(buf+len, "h\n");
1490 case KBD_TIMEOUT_DAYS:
1491 return len + sprintf(buf+len, "d\n");
1492 default:
1493 return -EINVAL;
1494 }
1495
1496 return len;
1497 }
1498
1499 static DEVICE_ATTR(stop_timeout, S_IRUGO | S_IWUSR,
1500 kbd_led_timeout_show, kbd_led_timeout_store);
1501
1502 static const char * const kbd_led_triggers[] = {
1503 "keyboard",
1504 "touchpad",
1505 /*"trackstick"*/ NULL, /* NOTE: trackstick is just alias for touchpad */
1506 "mouse",
1507 };
1508
kbd_led_triggers_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)1509 static ssize_t kbd_led_triggers_store(struct device *dev,
1510 struct device_attribute *attr,
1511 const char *buf, size_t count)
1512 {
1513 struct kbd_state new_state;
1514 struct kbd_state state;
1515 bool triggers_enabled = false;
1516 int trigger_bit = -1;
1517 char trigger[21];
1518 int i, ret;
1519
1520 ret = sscanf(buf, "%20s", trigger);
1521 if (ret != 1)
1522 return -EINVAL;
1523
1524 if (trigger[0] != '+' && trigger[0] != '-')
1525 return -EINVAL;
1526
1527 ret = kbd_get_state(&state);
1528 if (ret)
1529 return ret;
1530
1531 if (kbd_triggers_supported)
1532 triggers_enabled = kbd_is_trigger_mode_bit(state.mode_bit);
1533
1534 if (kbd_triggers_supported) {
1535 for (i = 0; i < ARRAY_SIZE(kbd_led_triggers); ++i) {
1536 if (!(kbd_info.triggers & BIT(i)))
1537 continue;
1538 if (!kbd_led_triggers[i])
1539 continue;
1540 if (strcmp(trigger+1, kbd_led_triggers[i]) != 0)
1541 continue;
1542 if (trigger[0] == '+' &&
1543 triggers_enabled && (state.triggers & BIT(i)))
1544 return count;
1545 if (trigger[0] == '-' &&
1546 (!triggers_enabled || !(state.triggers & BIT(i))))
1547 return count;
1548 trigger_bit = i;
1549 break;
1550 }
1551 }
1552
1553 if (trigger_bit != -1) {
1554 new_state = state;
1555 if (trigger[0] == '+')
1556 new_state.triggers |= BIT(trigger_bit);
1557 else {
1558 new_state.triggers &= ~BIT(trigger_bit);
1559 /* NOTE: trackstick bit (2) must be disabled when
1560 * disabling touchpad bit (1), otherwise touchpad
1561 * bit (1) will not be disabled */
1562 if (trigger_bit == 1)
1563 new_state.triggers &= ~BIT(2);
1564 }
1565 if ((kbd_info.triggers & new_state.triggers) !=
1566 new_state.triggers)
1567 return -EINVAL;
1568 if (new_state.triggers && !triggers_enabled) {
1569 new_state.mode_bit = KBD_MODE_BIT_TRIGGER;
1570 kbd_set_level(&new_state, kbd_previous_level);
1571 } else if (new_state.triggers == 0) {
1572 kbd_set_level(&new_state, 0);
1573 }
1574 if (!(kbd_info.modes & BIT(new_state.mode_bit)))
1575 return -EINVAL;
1576 ret = kbd_set_state_safe(&new_state, &state);
1577 if (ret)
1578 return ret;
1579 if (new_state.mode_bit != KBD_MODE_BIT_OFF)
1580 kbd_previous_mode_bit = new_state.mode_bit;
1581 return count;
1582 }
1583
1584 return -EINVAL;
1585 }
1586
kbd_led_triggers_show(struct device * dev,struct device_attribute * attr,char * buf)1587 static ssize_t kbd_led_triggers_show(struct device *dev,
1588 struct device_attribute *attr, char *buf)
1589 {
1590 struct kbd_state state;
1591 bool triggers_enabled;
1592 int level, i, ret;
1593 int len = 0;
1594
1595 ret = kbd_get_state(&state);
1596 if (ret)
1597 return ret;
1598
1599 len = 0;
1600
1601 if (kbd_triggers_supported) {
1602 triggers_enabled = kbd_is_trigger_mode_bit(state.mode_bit);
1603 level = kbd_get_level(&state);
1604 for (i = 0; i < ARRAY_SIZE(kbd_led_triggers); ++i) {
1605 if (!(kbd_info.triggers & BIT(i)))
1606 continue;
1607 if (!kbd_led_triggers[i])
1608 continue;
1609 if ((triggers_enabled || level <= 0) &&
1610 (state.triggers & BIT(i)))
1611 buf[len++] = '+';
1612 else
1613 buf[len++] = '-';
1614 len += sprintf(buf+len, "%s ", kbd_led_triggers[i]);
1615 }
1616 }
1617
1618 if (len)
1619 buf[len - 1] = '\n';
1620
1621 return len;
1622 }
1623
1624 static DEVICE_ATTR(start_triggers, S_IRUGO | S_IWUSR,
1625 kbd_led_triggers_show, kbd_led_triggers_store);
1626
kbd_led_als_enabled_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)1627 static ssize_t kbd_led_als_enabled_store(struct device *dev,
1628 struct device_attribute *attr,
1629 const char *buf, size_t count)
1630 {
1631 struct kbd_state new_state;
1632 struct kbd_state state;
1633 bool triggers_enabled = false;
1634 int enable;
1635 int ret;
1636
1637 ret = kstrtoint(buf, 0, &enable);
1638 if (ret)
1639 return ret;
1640
1641 ret = kbd_get_state(&state);
1642 if (ret)
1643 return ret;
1644
1645 if (enable == kbd_is_als_mode_bit(state.mode_bit))
1646 return count;
1647
1648 new_state = state;
1649
1650 if (kbd_triggers_supported)
1651 triggers_enabled = kbd_is_trigger_mode_bit(state.mode_bit);
1652
1653 if (enable) {
1654 if (triggers_enabled)
1655 new_state.mode_bit = KBD_MODE_BIT_TRIGGER_ALS;
1656 else
1657 new_state.mode_bit = KBD_MODE_BIT_ALS;
1658 } else {
1659 if (triggers_enabled) {
1660 new_state.mode_bit = KBD_MODE_BIT_TRIGGER;
1661 kbd_set_level(&new_state, kbd_previous_level);
1662 } else {
1663 new_state.mode_bit = KBD_MODE_BIT_ON;
1664 }
1665 }
1666 if (!(kbd_info.modes & BIT(new_state.mode_bit)))
1667 return -EINVAL;
1668
1669 ret = kbd_set_state_safe(&new_state, &state);
1670 if (ret)
1671 return ret;
1672 kbd_previous_mode_bit = new_state.mode_bit;
1673
1674 return count;
1675 }
1676
kbd_led_als_enabled_show(struct device * dev,struct device_attribute * attr,char * buf)1677 static ssize_t kbd_led_als_enabled_show(struct device *dev,
1678 struct device_attribute *attr,
1679 char *buf)
1680 {
1681 struct kbd_state state;
1682 bool enabled = false;
1683 int ret;
1684
1685 ret = kbd_get_state(&state);
1686 if (ret)
1687 return ret;
1688 enabled = kbd_is_als_mode_bit(state.mode_bit);
1689
1690 return sprintf(buf, "%d\n", enabled ? 1 : 0);
1691 }
1692
1693 static DEVICE_ATTR(als_enabled, S_IRUGO | S_IWUSR,
1694 kbd_led_als_enabled_show, kbd_led_als_enabled_store);
1695
kbd_led_als_setting_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)1696 static ssize_t kbd_led_als_setting_store(struct device *dev,
1697 struct device_attribute *attr,
1698 const char *buf, size_t count)
1699 {
1700 struct kbd_state state;
1701 struct kbd_state new_state;
1702 u8 setting;
1703 int ret;
1704
1705 ret = kstrtou8(buf, 10, &setting);
1706 if (ret)
1707 return ret;
1708
1709 ret = kbd_get_state(&state);
1710 if (ret)
1711 return ret;
1712
1713 new_state = state;
1714 new_state.als_setting = setting;
1715
1716 ret = kbd_set_state_safe(&new_state, &state);
1717 if (ret)
1718 return ret;
1719
1720 return count;
1721 }
1722
kbd_led_als_setting_show(struct device * dev,struct device_attribute * attr,char * buf)1723 static ssize_t kbd_led_als_setting_show(struct device *dev,
1724 struct device_attribute *attr,
1725 char *buf)
1726 {
1727 struct kbd_state state;
1728 int ret;
1729
1730 ret = kbd_get_state(&state);
1731 if (ret)
1732 return ret;
1733
1734 return sprintf(buf, "%d\n", state.als_setting);
1735 }
1736
1737 static DEVICE_ATTR(als_setting, S_IRUGO | S_IWUSR,
1738 kbd_led_als_setting_show, kbd_led_als_setting_store);
1739
1740 static struct attribute *kbd_led_attrs[] = {
1741 &dev_attr_stop_timeout.attr,
1742 &dev_attr_start_triggers.attr,
1743 NULL,
1744 };
1745
1746 static const struct attribute_group kbd_led_group = {
1747 .attrs = kbd_led_attrs,
1748 };
1749
1750 static struct attribute *kbd_led_als_attrs[] = {
1751 &dev_attr_als_enabled.attr,
1752 &dev_attr_als_setting.attr,
1753 NULL,
1754 };
1755
1756 static const struct attribute_group kbd_led_als_group = {
1757 .attrs = kbd_led_als_attrs,
1758 };
1759
1760 static const struct attribute_group *kbd_led_groups[] = {
1761 &kbd_led_group,
1762 &kbd_led_als_group,
1763 NULL,
1764 };
1765
kbd_led_level_get(struct led_classdev * led_cdev)1766 static enum led_brightness kbd_led_level_get(struct led_classdev *led_cdev)
1767 {
1768 int ret;
1769 u16 num;
1770 struct kbd_state state;
1771
1772 if (kbd_get_max_level()) {
1773 ret = kbd_get_state(&state);
1774 if (ret)
1775 return 0;
1776 ret = kbd_get_level(&state);
1777 if (ret < 0)
1778 return 0;
1779 return ret;
1780 }
1781
1782 if (kbd_get_valid_token_counts()) {
1783 ret = kbd_get_first_active_token_bit();
1784 if (ret < 0)
1785 return 0;
1786 for (num = kbd_token_bits; num != 0 && ret > 0; --ret)
1787 num &= num - 1; /* clear the first bit set */
1788 if (num == 0)
1789 return 0;
1790 return ffs(num) - 1;
1791 }
1792
1793 pr_warn("Keyboard brightness level control not supported\n");
1794 return 0;
1795 }
1796
kbd_led_level_set(struct led_classdev * led_cdev,enum led_brightness value)1797 static void kbd_led_level_set(struct led_classdev *led_cdev,
1798 enum led_brightness value)
1799 {
1800 struct kbd_state state;
1801 struct kbd_state new_state;
1802 u16 num;
1803
1804 if (kbd_get_max_level()) {
1805 if (kbd_get_state(&state))
1806 return;
1807 new_state = state;
1808 if (kbd_set_level(&new_state, value))
1809 return;
1810 kbd_set_state_safe(&new_state, &state);
1811 return;
1812 }
1813
1814 if (kbd_get_valid_token_counts()) {
1815 for (num = kbd_token_bits; num != 0 && value > 0; --value)
1816 num &= num - 1; /* clear the first bit set */
1817 if (num == 0)
1818 return;
1819 kbd_set_token_bit(ffs(num) - 1);
1820 return;
1821 }
1822
1823 pr_warn("Keyboard brightness level control not supported\n");
1824 }
1825
1826 static struct led_classdev kbd_led = {
1827 .name = "dell::kbd_backlight",
1828 .brightness_set = kbd_led_level_set,
1829 .brightness_get = kbd_led_level_get,
1830 .groups = kbd_led_groups,
1831 };
1832
kbd_led_init(struct device * dev)1833 static int __init kbd_led_init(struct device *dev)
1834 {
1835 kbd_init();
1836 if (!kbd_led_present)
1837 return -ENODEV;
1838 if (!kbd_als_supported)
1839 kbd_led_groups[1] = NULL;
1840 kbd_led.max_brightness = kbd_get_max_level();
1841 if (!kbd_led.max_brightness) {
1842 kbd_led.max_brightness = kbd_get_valid_token_counts();
1843 if (kbd_led.max_brightness)
1844 kbd_led.max_brightness--;
1845 }
1846 return led_classdev_register(dev, &kbd_led);
1847 }
1848
brightness_set_exit(struct led_classdev * led_cdev,enum led_brightness value)1849 static void brightness_set_exit(struct led_classdev *led_cdev,
1850 enum led_brightness value)
1851 {
1852 /* Don't change backlight level on exit */
1853 };
1854
kbd_led_exit(void)1855 static void kbd_led_exit(void)
1856 {
1857 if (!kbd_led_present)
1858 return;
1859 kbd_led.brightness_set = brightness_set_exit;
1860 led_classdev_unregister(&kbd_led);
1861 }
1862
dell_init(void)1863 static int __init dell_init(void)
1864 {
1865 int max_intensity = 0;
1866 int ret;
1867
1868 if (!dmi_check_system(dell_device_table))
1869 return -ENODEV;
1870
1871 quirks = NULL;
1872 /* find if this machine support other functions */
1873 dmi_check_system(dell_quirks);
1874
1875 dmi_walk(find_tokens, NULL);
1876
1877 if (!da_tokens) {
1878 pr_info("Unable to find dmi tokens\n");
1879 return -ENODEV;
1880 }
1881
1882 ret = platform_driver_register(&platform_driver);
1883 if (ret)
1884 goto fail_platform_driver;
1885 platform_device = platform_device_alloc("dell-laptop", -1);
1886 if (!platform_device) {
1887 ret = -ENOMEM;
1888 goto fail_platform_device1;
1889 }
1890 ret = platform_device_add(platform_device);
1891 if (ret)
1892 goto fail_platform_device2;
1893
1894 /*
1895 * Allocate buffer below 4GB for SMI data--only 32-bit physical addr
1896 * is passed to SMI handler.
1897 */
1898 buffer = (void *)__get_free_page(GFP_KERNEL | GFP_DMA32);
1899 if (!buffer) {
1900 ret = -ENOMEM;
1901 goto fail_buffer;
1902 }
1903
1904 ret = dell_setup_rfkill();
1905
1906 if (ret) {
1907 pr_warn("Unable to setup rfkill\n");
1908 goto fail_rfkill;
1909 }
1910
1911 if (quirks && quirks->touchpad_led)
1912 touchpad_led_init(&platform_device->dev);
1913
1914 kbd_led_init(&platform_device->dev);
1915
1916 dell_laptop_dir = debugfs_create_dir("dell_laptop", NULL);
1917 if (dell_laptop_dir != NULL)
1918 debugfs_create_file("rfkill", 0444, dell_laptop_dir, NULL,
1919 &dell_debugfs_fops);
1920
1921 #ifdef CONFIG_ACPI
1922 /* In the event of an ACPI backlight being available, don't
1923 * register the platform controller.
1924 */
1925 if (acpi_video_backlight_support())
1926 return 0;
1927 #endif
1928
1929 get_buffer();
1930 buffer->input[0] = find_token_location(BRIGHTNESS_TOKEN);
1931 if (buffer->input[0] != -1) {
1932 dell_send_request(buffer, 0, 2);
1933 max_intensity = buffer->output[3];
1934 }
1935 release_buffer();
1936
1937 if (max_intensity) {
1938 struct backlight_properties props;
1939 memset(&props, 0, sizeof(struct backlight_properties));
1940 props.type = BACKLIGHT_PLATFORM;
1941 props.max_brightness = max_intensity;
1942 dell_backlight_device = backlight_device_register("dell_backlight",
1943 &platform_device->dev,
1944 NULL,
1945 &dell_ops,
1946 &props);
1947
1948 if (IS_ERR(dell_backlight_device)) {
1949 ret = PTR_ERR(dell_backlight_device);
1950 dell_backlight_device = NULL;
1951 goto fail_backlight;
1952 }
1953
1954 dell_backlight_device->props.brightness =
1955 dell_get_intensity(dell_backlight_device);
1956 backlight_update_status(dell_backlight_device);
1957 }
1958
1959 return 0;
1960
1961 fail_backlight:
1962 i8042_remove_filter(dell_laptop_i8042_filter);
1963 cancel_delayed_work_sync(&dell_rfkill_work);
1964 dell_cleanup_rfkill();
1965 fail_rfkill:
1966 free_page((unsigned long)buffer);
1967 fail_buffer:
1968 platform_device_del(platform_device);
1969 fail_platform_device2:
1970 platform_device_put(platform_device);
1971 fail_platform_device1:
1972 platform_driver_unregister(&platform_driver);
1973 fail_platform_driver:
1974 kfree(da_tokens);
1975 return ret;
1976 }
1977
dell_exit(void)1978 static void __exit dell_exit(void)
1979 {
1980 debugfs_remove_recursive(dell_laptop_dir);
1981 if (quirks && quirks->touchpad_led)
1982 touchpad_led_exit();
1983 kbd_led_exit();
1984 i8042_remove_filter(dell_laptop_i8042_filter);
1985 cancel_delayed_work_sync(&dell_rfkill_work);
1986 backlight_device_unregister(dell_backlight_device);
1987 dell_cleanup_rfkill();
1988 if (platform_device) {
1989 platform_device_unregister(platform_device);
1990 platform_driver_unregister(&platform_driver);
1991 }
1992 kfree(da_tokens);
1993 free_page((unsigned long)buffer);
1994 }
1995
1996 module_init(dell_init);
1997 module_exit(dell_exit);
1998
1999 MODULE_AUTHOR("Matthew Garrett <mjg@redhat.com>");
2000 MODULE_AUTHOR("Gabriele Mazzotta <gabriele.mzt@gmail.com>");
2001 MODULE_AUTHOR("Pali Rohár <pali.rohar@gmail.com>");
2002 MODULE_DESCRIPTION("Dell laptop driver");
2003 MODULE_LICENSE("GPL");
2004