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dm thin metadata: fix __udivdi3 undefined on 32-bit
[linux/fpc-iii.git] / drivers / platform / x86 / samsung-laptop.c
blob8c146e2b6727acd818a38c937bc37d648f33ef38
1 /*
2 * Samsung Laptop driver
3 *
4 * Copyright (C) 2009,2011 Greg Kroah-Hartman (gregkh@suse.de)
5 * Copyright (C) 2009,2011 Novell Inc.
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License version 2 as published by
9 * the Free Software Foundation.
10 *
11 */
12 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
13
14 #include <linux/kernel.h>
15 #include <linux/init.h>
16 #include <linux/module.h>
17 #include <linux/delay.h>
18 #include <linux/pci.h>
19 #include <linux/backlight.h>
20 #include <linux/leds.h>
21 #include <linux/fb.h>
22 #include <linux/dmi.h>
23 #include <linux/platform_device.h>
24 #include <linux/rfkill.h>
25 #include <linux/acpi.h>
26 #include <linux/seq_file.h>
27 #include <linux/debugfs.h>
28 #include <linux/ctype.h>
29 #include <linux/efi.h>
30 #include <linux/suspend.h>
31 #include <acpi/video.h>
32
33 /*
34 * This driver is needed because a number of Samsung laptops do not hook
35 * their control settings through ACPI. So we have to poke around in the
36 * BIOS to do things like brightness values, and "special" key controls.
37 */
38
39 /*
40 * We have 0 - 8 as valid brightness levels. The specs say that level 0 should
41 * be reserved by the BIOS (which really doesn't make much sense), we tell
42 * userspace that the value is 0 - 7 and then just tell the hardware 1 - 8
43 */
44 #define MAX_BRIGHT 0x07
45
46
47 #define SABI_IFACE_MAIN 0x00
48 #define SABI_IFACE_SUB 0x02
49 #define SABI_IFACE_COMPLETE 0x04
50 #define SABI_IFACE_DATA 0x05
51
52 #define WL_STATUS_WLAN 0x0
53 #define WL_STATUS_BT 0x2
54
55 /* Structure get/set data using sabi */
56 struct sabi_data {
57 union {
58 struct {
59 u32 d0;
60 u32 d1;
61 u16 d2;
62 u8 d3;
63 };
64 u8 data[11];
65 };
66 };
67
68 struct sabi_header_offsets {
69 u8 port;
70 u8 re_mem;
71 u8 iface_func;
72 u8 en_mem;
73 u8 data_offset;
74 u8 data_segment;
75 };
76
77 struct sabi_commands {
78 /*
79 * Brightness is 0 - 8, as described above.
80 * Value 0 is for the BIOS to use
81 */
82 u16 get_brightness;
83 u16 set_brightness;
84
85 /*
86 * first byte:
87 * 0x00 - wireless is off
88 * 0x01 - wireless is on
89 * second byte:
90 * 0x02 - 3G is off
91 * 0x03 - 3G is on
92 * TODO, verify 3G is correct, that doesn't seem right...
93 */
94 u16 get_wireless_button;
95 u16 set_wireless_button;
96
97 /* 0 is off, 1 is on */
98 u16 get_backlight;
99 u16 set_backlight;
100
101 /*
102 * 0x80 or 0x00 - no action
103 * 0x81 - recovery key pressed
104 */
105 u16 get_recovery_mode;
106 u16 set_recovery_mode;
107
108 /*
109 * on seclinux: 0 is low, 1 is high,
110 * on swsmi: 0 is normal, 1 is silent, 2 is turbo
111 */
112 u16 get_performance_level;
113 u16 set_performance_level;
114
115 /* 0x80 is off, 0x81 is on */
116 u16 get_battery_life_extender;
117 u16 set_battery_life_extender;
118
119 /* 0x80 is off, 0x81 is on */
120 u16 get_usb_charge;
121 u16 set_usb_charge;
122
123 /* the first byte is for bluetooth and the third one is for wlan */
124 u16 get_wireless_status;
125 u16 set_wireless_status;
126
127 /* 0x80 is off, 0x81 is on */
128 u16 get_lid_handling;
129 u16 set_lid_handling;
130
131 /* 0x81 to read, (0x82 | level << 8) to set, 0xaabb to enable */
132 u16 kbd_backlight;
133
134 /*
135 * Tell the BIOS that Linux is running on this machine.
136 * 81 is on, 80 is off
137 */
138 u16 set_linux;
139 };
140
141 struct sabi_performance_level {
142 const char *name;
143 u16 value;
144 };
145
146 struct sabi_config {
147 int sabi_version;
148 const char *test_string;
149 u16 main_function;
150 const struct sabi_header_offsets header_offsets;
151 const struct sabi_commands commands;
152 const struct sabi_performance_level performance_levels[4];
153 u8 min_brightness;
154 u8 max_brightness;
155 };
156
157 static const struct sabi_config sabi_configs[] = {
158 {
159 /* I don't know if it is really 2, but it it is
160 * less than 3 anyway */
161 .sabi_version = 2,
162
163 .test_string = "SECLINUX",
164
165 .main_function = 0x4c49,
166
167 .header_offsets = {
168 .port = 0x00,
169 .re_mem = 0x02,
170 .iface_func = 0x03,
171 .en_mem = 0x04,
172 .data_offset = 0x05,
173 .data_segment = 0x07,
174 },
175
176 .commands = {
177 .get_brightness = 0x00,
178 .set_brightness = 0x01,
179
180 .get_wireless_button = 0x02,
181 .set_wireless_button = 0x03,
182
183 .get_backlight = 0x04,
184 .set_backlight = 0x05,
185
186 .get_recovery_mode = 0x06,
187 .set_recovery_mode = 0x07,
188
189 .get_performance_level = 0x08,
190 .set_performance_level = 0x09,
191
192 .get_battery_life_extender = 0xFFFF,
193 .set_battery_life_extender = 0xFFFF,
194
195 .get_usb_charge = 0xFFFF,
196 .set_usb_charge = 0xFFFF,
197
198 .get_wireless_status = 0xFFFF,
199 .set_wireless_status = 0xFFFF,
200
201 .get_lid_handling = 0xFFFF,
202 .set_lid_handling = 0xFFFF,
203
204 .kbd_backlight = 0xFFFF,
205
206 .set_linux = 0x0a,
207 },
208
209 .performance_levels = {
210 {
211 .name = "silent",
212 .value = 0,
213 },
214 {
215 .name = "normal",
216 .value = 1,
217 },
218 { },
219 },
220 .min_brightness = 1,
221 .max_brightness = 8,
222 },
223 {
224 .sabi_version = 3,
225
226 .test_string = "SwSmi@",
227
228 .main_function = 0x5843,
229
230 .header_offsets = {
231 .port = 0x00,
232 .re_mem = 0x04,
233 .iface_func = 0x02,
234 .en_mem = 0x03,
235 .data_offset = 0x05,
236 .data_segment = 0x07,
237 },
238
239 .commands = {
240 .get_brightness = 0x10,
241 .set_brightness = 0x11,
242
243 .get_wireless_button = 0x12,
244 .set_wireless_button = 0x13,
245
246 .get_backlight = 0x2d,
247 .set_backlight = 0x2e,
248
249 .get_recovery_mode = 0xff,
250 .set_recovery_mode = 0xff,
251
252 .get_performance_level = 0x31,
253 .set_performance_level = 0x32,
254
255 .get_battery_life_extender = 0x65,
256 .set_battery_life_extender = 0x66,
257
258 .get_usb_charge = 0x67,
259 .set_usb_charge = 0x68,
260
261 .get_wireless_status = 0x69,
262 .set_wireless_status = 0x6a,
263
264 .get_lid_handling = 0x6d,
265 .set_lid_handling = 0x6e,
266
267 .kbd_backlight = 0x78,
268
269 .set_linux = 0xff,
270 },
271
272 .performance_levels = {
273 {
274 .name = "normal",
275 .value = 0,
276 },
277 {
278 .name = "silent",
279 .value = 1,
280 },
281 {
282 .name = "overclock",
283 .value = 2,
284 },
285 { },
286 },
287 .min_brightness = 0,
288 .max_brightness = 8,
289 },
290 { },
291 };
292
293 /*
294 * samsung-laptop/ - debugfs root directory
295 * f0000_segment - dump f0000 segment
296 * command - current command
297 * data - current data
298 * d0, d1, d2, d3 - data fields
299 * call - call SABI using command and data
300 *
301 * This allow to call arbitrary sabi commands wihout
302 * modifying the driver at all.
303 * For example, setting the keyboard backlight brightness to 5
304 *
305 * echo 0x78 > command
306 * echo 0x0582 > d0
307 * echo 0 > d1
308 * echo 0 > d2
309 * echo 0 > d3
310 * cat call
311 */
312
313 struct samsung_laptop_debug {
314 struct dentry *root;
315 struct sabi_data data;
316 u16 command;
317
318 struct debugfs_blob_wrapper f0000_wrapper;
319 struct debugfs_blob_wrapper data_wrapper;
320 struct debugfs_blob_wrapper sdiag_wrapper;
321 };
322
323 struct samsung_laptop;
324
325 struct samsung_rfkill {
326 struct samsung_laptop *samsung;
327 struct rfkill *rfkill;
328 enum rfkill_type type;
329 };
330
331 struct samsung_laptop {
332 const struct sabi_config *config;
333
334 void __iomem *sabi;
335 void __iomem *sabi_iface;
336 void __iomem *f0000_segment;
337
338 struct mutex sabi_mutex;
339
340 struct platform_device *platform_device;
341 struct backlight_device *backlight_device;
342
343 struct samsung_rfkill wlan;
344 struct samsung_rfkill bluetooth;
345
346 struct led_classdev kbd_led;
347 int kbd_led_wk;
348 struct workqueue_struct *led_workqueue;
349 struct work_struct kbd_led_work;
350
351 struct samsung_laptop_debug debug;
352 struct samsung_quirks *quirks;
353
354 struct notifier_block pm_nb;
355
356 bool handle_backlight;
357 bool has_stepping_quirk;
358
359 char sdiag[64];
360 };
361
362 struct samsung_quirks {
363 bool broken_acpi_video;
364 bool four_kbd_backlight_levels;
365 bool enable_kbd_backlight;
366 bool use_native_backlight;
367 bool lid_handling;
368 };
369
370 static struct samsung_quirks samsung_unknown = {};
371
372 static struct samsung_quirks samsung_broken_acpi_video = {
373 .broken_acpi_video = true,
374 };
375
376 static struct samsung_quirks samsung_use_native_backlight = {
377 .use_native_backlight = true,
378 };
379
380 static struct samsung_quirks samsung_np740u3e = {
381 .four_kbd_backlight_levels = true,
382 .enable_kbd_backlight = true,
383 };
384
385 static struct samsung_quirks samsung_lid_handling = {
386 .lid_handling = true,
387 };
388
389 static bool force;
390 module_param(force, bool, 0);
391 MODULE_PARM_DESC(force,
392 "Disable the DMI check and forces the driver to be loaded");
393
394 static bool debug;
395 module_param(debug, bool, S_IRUGO | S_IWUSR);
396 MODULE_PARM_DESC(debug, "Debug enabled or not");
397
398 static int sabi_command(struct samsung_laptop *samsung, u16 command,
399 struct sabi_data *in,
400 struct sabi_data *out)
401 {
402 const struct sabi_config *config = samsung->config;
403 int ret = 0;
404 u16 port = readw(samsung->sabi + config->header_offsets.port);
405 u8 complete, iface_data;
406
407 mutex_lock(&samsung->sabi_mutex);
408
409 if (debug) {
410 if (in)
411 pr_info("SABI command:0x%04x "
412 "data:{0x%08x, 0x%08x, 0x%04x, 0x%02x}",
413 command, in->d0, in->d1, in->d2, in->d3);
414 else
415 pr_info("SABI command:0x%04x", command);
416 }
417
418 /* enable memory to be able to write to it */
419 outb(readb(samsung->sabi + config->header_offsets.en_mem), port);
420
421 /* write out the command */
422 writew(config->main_function, samsung->sabi_iface + SABI_IFACE_MAIN);
423 writew(command, samsung->sabi_iface + SABI_IFACE_SUB);
424 writeb(0, samsung->sabi_iface + SABI_IFACE_COMPLETE);
425 if (in) {
426 writel(in->d0, samsung->sabi_iface + SABI_IFACE_DATA);
427 writel(in->d1, samsung->sabi_iface + SABI_IFACE_DATA + 4);
428 writew(in->d2, samsung->sabi_iface + SABI_IFACE_DATA + 8);
429 writeb(in->d3, samsung->sabi_iface + SABI_IFACE_DATA + 10);
430 }
431 outb(readb(samsung->sabi + config->header_offsets.iface_func), port);
432
433 /* write protect memory to make it safe */
434 outb(readb(samsung->sabi + config->header_offsets.re_mem), port);
435
436 /* see if the command actually succeeded */
437 complete = readb(samsung->sabi_iface + SABI_IFACE_COMPLETE);
438 iface_data = readb(samsung->sabi_iface + SABI_IFACE_DATA);
439
440 /* iface_data = 0xFF happens when a command is not known
441 * so we only add a warning in debug mode since we will
442 * probably issue some unknown command at startup to find
443 * out which features are supported */
444 if (complete != 0xaa || (iface_data == 0xff && debug))
445 pr_warn("SABI command 0x%04x failed with"
446 " completion flag 0x%02x and interface data 0x%02x",
447 command, complete, iface_data);
448
449 if (complete != 0xaa || iface_data == 0xff) {
450 ret = -EINVAL;
451 goto exit;
452 }
453
454 if (out) {
455 out->d0 = readl(samsung->sabi_iface + SABI_IFACE_DATA);
456 out->d1 = readl(samsung->sabi_iface + SABI_IFACE_DATA + 4);
457 out->d2 = readw(samsung->sabi_iface + SABI_IFACE_DATA + 2);
458 out->d3 = readb(samsung->sabi_iface + SABI_IFACE_DATA + 1);
459 }
460
461 if (debug && out) {
462 pr_info("SABI return data:{0x%08x, 0x%08x, 0x%04x, 0x%02x}",
463 out->d0, out->d1, out->d2, out->d3);
464 }
465
466 exit:
467 mutex_unlock(&samsung->sabi_mutex);
468 return ret;
469 }
470
471 /* simple wrappers usable with most commands */
472 static int sabi_set_commandb(struct samsung_laptop *samsung,
473 u16 command, u8 data)
474 {
475 struct sabi_data in = { { { .d0 = 0, .d1 = 0, .d2 = 0, .d3 = 0 } } };
476
477 in.data[0] = data;
478 return sabi_command(samsung, command, &in, NULL);
479 }
480
481 static int read_brightness(struct samsung_laptop *samsung)
482 {
483 const struct sabi_config *config = samsung->config;
484 const struct sabi_commands *commands = &samsung->config->commands;
485 struct sabi_data sretval;
486 int user_brightness = 0;
487 int retval;
488
489 retval = sabi_command(samsung, commands->get_brightness,
490 NULL, &sretval);
491 if (retval)
492 return retval;
493
494 user_brightness = sretval.data[0];
495 if (user_brightness > config->min_brightness)
496 user_brightness -= config->min_brightness;
497 else
498 user_brightness = 0;
499
500 return user_brightness;
501 }
502
503 static void set_brightness(struct samsung_laptop *samsung, u8 user_brightness)
504 {
505 const struct sabi_config *config = samsung->config;
506 const struct sabi_commands *commands = &samsung->config->commands;
507 u8 user_level = user_brightness + config->min_brightness;
508
509 if (samsung->has_stepping_quirk && user_level != 0) {
510 /*
511 * short circuit if the specified level is what's already set
512 * to prevent the screen from flickering needlessly
513 */
514 if (user_brightness == read_brightness(samsung))
515 return;
516
517 sabi_set_commandb(samsung, commands->set_brightness, 0);
518 }
519
520 sabi_set_commandb(samsung, commands->set_brightness, user_level);
521 }
522
523 static int get_brightness(struct backlight_device *bd)
524 {
525 struct samsung_laptop *samsung = bl_get_data(bd);
526
527 return read_brightness(samsung);
528 }
529
530 static void check_for_stepping_quirk(struct samsung_laptop *samsung)
531 {
532 int initial_level;
533 int check_level;
534 int orig_level = read_brightness(samsung);
535
536 /*
537 * Some laptops exhibit the strange behaviour of stepping toward
538 * (rather than setting) the brightness except when changing to/from
539 * brightness level 0. This behaviour is checked for here and worked
540 * around in set_brightness.
541 */
542
543 if (orig_level == 0)
544 set_brightness(samsung, 1);
545
546 initial_level = read_brightness(samsung);
547
548 if (initial_level <= 2)
549 check_level = initial_level + 2;
550 else
551 check_level = initial_level - 2;
552
553 samsung->has_stepping_quirk = false;
554 set_brightness(samsung, check_level);
555
556 if (read_brightness(samsung) != check_level) {
557 samsung->has_stepping_quirk = true;
558 pr_info("enabled workaround for brightness stepping quirk\n");
559 }
560
561 set_brightness(samsung, orig_level);
562 }
563
564 static int update_status(struct backlight_device *bd)
565 {
566 struct samsung_laptop *samsung = bl_get_data(bd);
567 const struct sabi_commands *commands = &samsung->config->commands;
568
569 set_brightness(samsung, bd->props.brightness);
570
571 if (bd->props.power == FB_BLANK_UNBLANK)
572 sabi_set_commandb(samsung, commands->set_backlight, 1);
573 else
574 sabi_set_commandb(samsung, commands->set_backlight, 0);
575
576 return 0;
577 }
578
579 static const struct backlight_ops backlight_ops = {
580 .get_brightness = get_brightness,
581 .update_status = update_status,
582 };
583
584 static int seclinux_rfkill_set(void *data, bool blocked)
585 {
586 struct samsung_rfkill *srfkill = data;
587 struct samsung_laptop *samsung = srfkill->samsung;
588 const struct sabi_commands *commands = &samsung->config->commands;
589
590 return sabi_set_commandb(samsung, commands->set_wireless_button,
591 !blocked);
592 }
593
594 static struct rfkill_ops seclinux_rfkill_ops = {
595 .set_block = seclinux_rfkill_set,
596 };
597
598 static int swsmi_wireless_status(struct samsung_laptop *samsung,
599 struct sabi_data *data)
600 {
601 const struct sabi_commands *commands = &samsung->config->commands;
602
603 return sabi_command(samsung, commands->get_wireless_status,
604 NULL, data);
605 }
606
607 static int swsmi_rfkill_set(void *priv, bool blocked)
608 {
609 struct samsung_rfkill *srfkill = priv;
610 struct samsung_laptop *samsung = srfkill->samsung;
611 const struct sabi_commands *commands = &samsung->config->commands;
612 struct sabi_data data;
613 int ret, i;
614
615 ret = swsmi_wireless_status(samsung, &data);
616 if (ret)
617 return ret;
618
619 /* Don't set the state for non-present devices */
620 for (i = 0; i < 4; i++)
621 if (data.data[i] == 0x02)
622 data.data[1] = 0;
623
624 if (srfkill->type == RFKILL_TYPE_WLAN)
625 data.data[WL_STATUS_WLAN] = !blocked;
626 else if (srfkill->type == RFKILL_TYPE_BLUETOOTH)
627 data.data[WL_STATUS_BT] = !blocked;
628
629 return sabi_command(samsung, commands->set_wireless_status,
630 &data, &data);
631 }
632
633 static void swsmi_rfkill_query(struct rfkill *rfkill, void *priv)
634 {
635 struct samsung_rfkill *srfkill = priv;
636 struct samsung_laptop *samsung = srfkill->samsung;
637 struct sabi_data data;
638 int ret;
639
640 ret = swsmi_wireless_status(samsung, &data);
641 if (ret)
642 return ;
643
644 if (srfkill->type == RFKILL_TYPE_WLAN)
645 ret = data.data[WL_STATUS_WLAN];
646 else if (srfkill->type == RFKILL_TYPE_BLUETOOTH)
647 ret = data.data[WL_STATUS_BT];
648 else
649 return ;
650
651 rfkill_set_sw_state(rfkill, !ret);
652 }
653
654 static struct rfkill_ops swsmi_rfkill_ops = {
655 .set_block = swsmi_rfkill_set,
656 .query = swsmi_rfkill_query,
657 };
658
659 static ssize_t get_performance_level(struct device *dev,
660 struct device_attribute *attr, char *buf)
661 {
662 struct samsung_laptop *samsung = dev_get_drvdata(dev);
663 const struct sabi_config *config = samsung->config;
664 const struct sabi_commands *commands = &config->commands;
665 struct sabi_data sretval;
666 int retval;
667 int i;
668
669 /* Read the state */
670 retval = sabi_command(samsung, commands->get_performance_level,
671 NULL, &sretval);
672 if (retval)
673 return retval;
674
675 /* The logic is backwards, yeah, lots of fun... */
676 for (i = 0; config->performance_levels[i].name; ++i) {
677 if (sretval.data[0] == config->performance_levels[i].value)
678 return sprintf(buf, "%s\n", config->performance_levels[i].name);
679 }
680 return sprintf(buf, "%s\n", "unknown");
681 }
682
683 static ssize_t set_performance_level(struct device *dev,
684 struct device_attribute *attr, const char *buf,
685 size_t count)
686 {
687 struct samsung_laptop *samsung = dev_get_drvdata(dev);
688 const struct sabi_config *config = samsung->config;
689 const struct sabi_commands *commands = &config->commands;
690 int i;
691
692 if (count < 1)
693 return count;
694
695 for (i = 0; config->performance_levels[i].name; ++i) {
696 const struct sabi_performance_level *level =
697 &config->performance_levels[i];
698 if (!strncasecmp(level->name, buf, strlen(level->name))) {
699 sabi_set_commandb(samsung,
700 commands->set_performance_level,
701 level->value);
702 break;
703 }
704 }
705
706 if (!config->performance_levels[i].name)
707 return -EINVAL;
708
709 return count;
710 }
711
712 static DEVICE_ATTR(performance_level, S_IWUSR | S_IRUGO,
713 get_performance_level, set_performance_level);
714
715 static int read_battery_life_extender(struct samsung_laptop *samsung)
716 {
717 const struct sabi_commands *commands = &samsung->config->commands;
718 struct sabi_data data;
719 int retval;
720
721 if (commands->get_battery_life_extender == 0xFFFF)
722 return -ENODEV;
723
724 memset(&data, 0, sizeof(data));
725 data.data[0] = 0x80;
726 retval = sabi_command(samsung, commands->get_battery_life_extender,
727 &data, &data);
728
729 if (retval)
730 return retval;
731
732 if (data.data[0] != 0 && data.data[0] != 1)
733 return -ENODEV;
734
735 return data.data[0];
736 }
737
738 static int write_battery_life_extender(struct samsung_laptop *samsung,
739 int enabled)
740 {
741 const struct sabi_commands *commands = &samsung->config->commands;
742 struct sabi_data data;
743
744 memset(&data, 0, sizeof(data));
745 data.data[0] = 0x80 | enabled;
746 return sabi_command(samsung, commands->set_battery_life_extender,
747 &data, NULL);
748 }
749
750 static ssize_t get_battery_life_extender(struct device *dev,
751 struct device_attribute *attr,
752 char *buf)
753 {
754 struct samsung_laptop *samsung = dev_get_drvdata(dev);
755 int ret;
756
757 ret = read_battery_life_extender(samsung);
758 if (ret < 0)
759 return ret;
760
761 return sprintf(buf, "%d\n", ret);
762 }
763
764 static ssize_t set_battery_life_extender(struct device *dev,
765 struct device_attribute *attr,
766 const char *buf, size_t count)
767 {
768 struct samsung_laptop *samsung = dev_get_drvdata(dev);
769 int ret, value;
770
771 if (!count || kstrtoint(buf, 0, &value) != 0)
772 return -EINVAL;
773
774 ret = write_battery_life_extender(samsung, !!value);
775 if (ret < 0)
776 return ret;
777
778 return count;
779 }
780
781 static DEVICE_ATTR(battery_life_extender, S_IWUSR | S_IRUGO,
782 get_battery_life_extender, set_battery_life_extender);
783
784 static int read_usb_charge(struct samsung_laptop *samsung)
785 {
786 const struct sabi_commands *commands = &samsung->config->commands;
787 struct sabi_data data;
788 int retval;
789
790 if (commands->get_usb_charge == 0xFFFF)
791 return -ENODEV;
792
793 memset(&data, 0, sizeof(data));
794 data.data[0] = 0x80;
795 retval = sabi_command(samsung, commands->get_usb_charge,
796 &data, &data);
797
798 if (retval)
799 return retval;
800
801 if (data.data[0] != 0 && data.data[0] != 1)
802 return -ENODEV;
803
804 return data.data[0];
805 }
806
807 static int write_usb_charge(struct samsung_laptop *samsung,
808 int enabled)
809 {
810 const struct sabi_commands *commands = &samsung->config->commands;
811 struct sabi_data data;
812
813 memset(&data, 0, sizeof(data));
814 data.data[0] = 0x80 | enabled;
815 return sabi_command(samsung, commands->set_usb_charge,
816 &data, NULL);
817 }
818
819 static ssize_t get_usb_charge(struct device *dev,
820 struct device_attribute *attr,
821 char *buf)
822 {
823 struct samsung_laptop *samsung = dev_get_drvdata(dev);
824 int ret;
825
826 ret = read_usb_charge(samsung);
827 if (ret < 0)
828 return ret;
829
830 return sprintf(buf, "%d\n", ret);
831 }
832
833 static ssize_t set_usb_charge(struct device *dev,
834 struct device_attribute *attr,
835 const char *buf, size_t count)
836 {
837 struct samsung_laptop *samsung = dev_get_drvdata(dev);
838 int ret, value;
839
840 if (!count || kstrtoint(buf, 0, &value) != 0)
841 return -EINVAL;
842
843 ret = write_usb_charge(samsung, !!value);
844 if (ret < 0)
845 return ret;
846
847 return count;
848 }
849
850 static DEVICE_ATTR(usb_charge, S_IWUSR | S_IRUGO,
851 get_usb_charge, set_usb_charge);
852
853 static int read_lid_handling(struct samsung_laptop *samsung)
854 {
855 const struct sabi_commands *commands = &samsung->config->commands;
856 struct sabi_data data;
857 int retval;
858
859 if (commands->get_lid_handling == 0xFFFF)
860 return -ENODEV;
861
862 memset(&data, 0, sizeof(data));
863 retval = sabi_command(samsung, commands->get_lid_handling,
864 &data, &data);
865
866 if (retval)
867 return retval;
868
869 return data.data[0] & 0x1;
870 }
871
872 static int write_lid_handling(struct samsung_laptop *samsung,
873 int enabled)
874 {
875 const struct sabi_commands *commands = &samsung->config->commands;
876 struct sabi_data data;
877
878 memset(&data, 0, sizeof(data));
879 data.data[0] = 0x80 | enabled;
880 return sabi_command(samsung, commands->set_lid_handling,
881 &data, NULL);
882 }
883
884 static ssize_t get_lid_handling(struct device *dev,
885 struct device_attribute *attr,
886 char *buf)
887 {
888 struct samsung_laptop *samsung = dev_get_drvdata(dev);
889 int ret;
890
891 ret = read_lid_handling(samsung);
892 if (ret < 0)
893 return ret;
894
895 return sprintf(buf, "%d\n", ret);
896 }
897
898 static ssize_t set_lid_handling(struct device *dev,
899 struct device_attribute *attr,
900 const char *buf, size_t count)
901 {
902 struct samsung_laptop *samsung = dev_get_drvdata(dev);
903 int ret, value;
904
905 if (!count || kstrtoint(buf, 0, &value) != 0)
906 return -EINVAL;
907
908 ret = write_lid_handling(samsung, !!value);
909 if (ret < 0)
910 return ret;
911
912 return count;
913 }
914
915 static DEVICE_ATTR(lid_handling, S_IWUSR | S_IRUGO,
916 get_lid_handling, set_lid_handling);
917
918 static struct attribute *platform_attributes[] = {
919 &dev_attr_performance_level.attr,
920 &dev_attr_battery_life_extender.attr,
921 &dev_attr_usb_charge.attr,
922 &dev_attr_lid_handling.attr,
923 NULL
924 };
925
926 static int find_signature(void __iomem *memcheck, const char *testStr)
927 {
928 int i = 0;
929 int loca;
930
931 for (loca = 0; loca < 0xffff; loca++) {
932 char temp = readb(memcheck + loca);
933
934 if (temp == testStr[i]) {
935 if (i == strlen(testStr)-1)
936 break;
937 ++i;
938 } else {
939 i = 0;
940 }
941 }
942 return loca;
943 }
944
945 static void samsung_rfkill_exit(struct samsung_laptop *samsung)
946 {
947 if (samsung->wlan.rfkill) {
948 rfkill_unregister(samsung->wlan.rfkill);
949 rfkill_destroy(samsung->wlan.rfkill);
950 samsung->wlan.rfkill = NULL;
951 }
952 if (samsung->bluetooth.rfkill) {
953 rfkill_unregister(samsung->bluetooth.rfkill);
954 rfkill_destroy(samsung->bluetooth.rfkill);
955 samsung->bluetooth.rfkill = NULL;
956 }
957 }
958
959 static int samsung_new_rfkill(struct samsung_laptop *samsung,
960 struct samsung_rfkill *arfkill,
961 const char *name, enum rfkill_type type,
962 const struct rfkill_ops *ops,
963 int blocked)
964 {
965 struct rfkill **rfkill = &arfkill->rfkill;
966 int ret;
967
968 arfkill->type = type;
969 arfkill->samsung = samsung;
970
971 *rfkill = rfkill_alloc(name, &samsung->platform_device->dev,
972 type, ops, arfkill);
973
974 if (!*rfkill)
975 return -EINVAL;
976
977 if (blocked != -1)
978 rfkill_init_sw_state(*rfkill, blocked);
979
980 ret = rfkill_register(*rfkill);
981 if (ret) {
982 rfkill_destroy(*rfkill);
983 *rfkill = NULL;
984 return ret;
985 }
986 return 0;
987 }
988
989 static int __init samsung_rfkill_init_seclinux(struct samsung_laptop *samsung)
990 {
991 return samsung_new_rfkill(samsung, &samsung->wlan, "samsung-wlan",
992 RFKILL_TYPE_WLAN, &seclinux_rfkill_ops, -1);
993 }
994
995 static int __init samsung_rfkill_init_swsmi(struct samsung_laptop *samsung)
996 {
997 struct sabi_data data;
998 int ret;
999
1000 ret = swsmi_wireless_status(samsung, &data);
1001 if (ret) {
1002 /* Some swsmi laptops use the old seclinux way to control
1003 * wireless devices */
1004 if (ret == -EINVAL)
1005 ret = samsung_rfkill_init_seclinux(samsung);
1006 return ret;
1007 }
1008
1009 /* 0x02 seems to mean that the device is no present/available */
1010
1011 if (data.data[WL_STATUS_WLAN] != 0x02)
1012 ret = samsung_new_rfkill(samsung, &samsung->wlan,
1013 "samsung-wlan",
1014 RFKILL_TYPE_WLAN,
1015 &swsmi_rfkill_ops,
1016 !data.data[WL_STATUS_WLAN]);
1017 if (ret)
1018 goto exit;
1019
1020 if (data.data[WL_STATUS_BT] != 0x02)
1021 ret = samsung_new_rfkill(samsung, &samsung->bluetooth,
1022 "samsung-bluetooth",
1023 RFKILL_TYPE_BLUETOOTH,
1024 &swsmi_rfkill_ops,
1025 !data.data[WL_STATUS_BT]);
1026 if (ret)
1027 goto exit;
1028
1029 exit:
1030 if (ret)
1031 samsung_rfkill_exit(samsung);
1032
1033 return ret;
1034 }
1035
1036 static int __init samsung_rfkill_init(struct samsung_laptop *samsung)
1037 {
1038 if (samsung->config->sabi_version == 2)
1039 return samsung_rfkill_init_seclinux(samsung);
1040 if (samsung->config->sabi_version == 3)
1041 return samsung_rfkill_init_swsmi(samsung);
1042 return 0;
1043 }
1044
1045 static void samsung_lid_handling_exit(struct samsung_laptop *samsung)
1046 {
1047 if (samsung->quirks->lid_handling)
1048 write_lid_handling(samsung, 0);
1049 }
1050
1051 static int __init samsung_lid_handling_init(struct samsung_laptop *samsung)
1052 {
1053 int retval = 0;
1054
1055 if (samsung->quirks->lid_handling)
1056 retval = write_lid_handling(samsung, 1);
1057
1058 return retval;
1059 }
1060
1061 static int kbd_backlight_enable(struct samsung_laptop *samsung)
1062 {
1063 const struct sabi_commands *commands = &samsung->config->commands;
1064 struct sabi_data data;
1065 int retval;
1066
1067 if (commands->kbd_backlight == 0xFFFF)
1068 return -ENODEV;
1069
1070 memset(&data, 0, sizeof(data));
1071 data.d0 = 0xaabb;
1072 retval = sabi_command(samsung, commands->kbd_backlight,
1073 &data, &data);
1074
1075 if (retval)
1076 return retval;
1077
1078 if (data.d0 != 0xccdd)
1079 return -ENODEV;
1080 return 0;
1081 }
1082
1083 static int kbd_backlight_read(struct samsung_laptop *samsung)
1084 {
1085 const struct sabi_commands *commands = &samsung->config->commands;
1086 struct sabi_data data;
1087 int retval;
1088
1089 memset(&data, 0, sizeof(data));
1090 data.data[0] = 0x81;
1091 retval = sabi_command(samsung, commands->kbd_backlight,
1092 &data, &data);
1093
1094 if (retval)
1095 return retval;
1096
1097 return data.data[0];
1098 }
1099
1100 static int kbd_backlight_write(struct samsung_laptop *samsung, int brightness)
1101 {
1102 const struct sabi_commands *commands = &samsung->config->commands;
1103 struct sabi_data data;
1104
1105 memset(&data, 0, sizeof(data));
1106 data.d0 = 0x82 | ((brightness & 0xFF) << 8);
1107 return sabi_command(samsung, commands->kbd_backlight,
1108 &data, NULL);
1109 }
1110
1111 static void kbd_led_update(struct work_struct *work)
1112 {
1113 struct samsung_laptop *samsung;
1114
1115 samsung = container_of(work, struct samsung_laptop, kbd_led_work);
1116 kbd_backlight_write(samsung, samsung->kbd_led_wk);
1117 }
1118
1119 static void kbd_led_set(struct led_classdev *led_cdev,
1120 enum led_brightness value)
1121 {
1122 struct samsung_laptop *samsung;
1123
1124 samsung = container_of(led_cdev, struct samsung_laptop, kbd_led);
1125
1126 if (value > samsung->kbd_led.max_brightness)
1127 value = samsung->kbd_led.max_brightness;
1128 else if (value < 0)
1129 value = 0;
1130
1131 samsung->kbd_led_wk = value;
1132 queue_work(samsung->led_workqueue, &samsung->kbd_led_work);
1133 }
1134
1135 static enum led_brightness kbd_led_get(struct led_classdev *led_cdev)
1136 {
1137 struct samsung_laptop *samsung;
1138
1139 samsung = container_of(led_cdev, struct samsung_laptop, kbd_led);
1140 return kbd_backlight_read(samsung);
1141 }
1142
1143 static void samsung_leds_exit(struct samsung_laptop *samsung)
1144 {
1145 if (!IS_ERR_OR_NULL(samsung->kbd_led.dev))
1146 led_classdev_unregister(&samsung->kbd_led);
1147 if (samsung->led_workqueue)
1148 destroy_workqueue(samsung->led_workqueue);
1149 }
1150
1151 static int __init samsung_leds_init(struct samsung_laptop *samsung)
1152 {
1153 int ret = 0;
1154
1155 samsung->led_workqueue = create_singlethread_workqueue("led_workqueue");
1156 if (!samsung->led_workqueue)
1157 return -ENOMEM;
1158
1159 if (kbd_backlight_enable(samsung) >= 0) {
1160 INIT_WORK(&samsung->kbd_led_work, kbd_led_update);
1161
1162 samsung->kbd_led.name = "samsung::kbd_backlight";
1163 samsung->kbd_led.brightness_set = kbd_led_set;
1164 samsung->kbd_led.brightness_get = kbd_led_get;
1165 samsung->kbd_led.max_brightness = 8;
1166 if (samsung->quirks->four_kbd_backlight_levels)
1167 samsung->kbd_led.max_brightness = 4;
1168
1169 ret = led_classdev_register(&samsung->platform_device->dev,
1170 &samsung->kbd_led);
1171 }
1172
1173 if (ret)
1174 samsung_leds_exit(samsung);
1175
1176 return ret;
1177 }
1178
1179 static void samsung_backlight_exit(struct samsung_laptop *samsung)
1180 {
1181 if (samsung->backlight_device) {
1182 backlight_device_unregister(samsung->backlight_device);
1183 samsung->backlight_device = NULL;
1184 }
1185 }
1186
1187 static int __init samsung_backlight_init(struct samsung_laptop *samsung)
1188 {
1189 struct backlight_device *bd;
1190 struct backlight_properties props;
1191
1192 if (!samsung->handle_backlight)
1193 return 0;
1194
1195 memset(&props, 0, sizeof(struct backlight_properties));
1196 props.type = BACKLIGHT_PLATFORM;
1197 props.max_brightness = samsung->config->max_brightness -
1198 samsung->config->min_brightness;
1199
1200 bd = backlight_device_register("samsung",
1201 &samsung->platform_device->dev,
1202 samsung, &backlight_ops,
1203 &props);
1204 if (IS_ERR(bd))
1205 return PTR_ERR(bd);
1206
1207 samsung->backlight_device = bd;
1208 samsung->backlight_device->props.brightness = read_brightness(samsung);
1209 samsung->backlight_device->props.power = FB_BLANK_UNBLANK;
1210 backlight_update_status(samsung->backlight_device);
1211
1212 return 0;
1213 }
1214
1215 static umode_t samsung_sysfs_is_visible(struct kobject *kobj,
1216 struct attribute *attr, int idx)
1217 {
1218 struct device *dev = container_of(kobj, struct device, kobj);
1219 struct platform_device *pdev = to_platform_device(dev);
1220 struct samsung_laptop *samsung = platform_get_drvdata(pdev);
1221 bool ok = true;
1222
1223 if (attr == &dev_attr_performance_level.attr)
1224 ok = !!samsung->config->performance_levels[0].name;
1225 if (attr == &dev_attr_battery_life_extender.attr)
1226 ok = !!(read_battery_life_extender(samsung) >= 0);
1227 if (attr == &dev_attr_usb_charge.attr)
1228 ok = !!(read_usb_charge(samsung) >= 0);
1229 if (attr == &dev_attr_lid_handling.attr)
1230 ok = !!(read_lid_handling(samsung) >= 0);
1231
1232 return ok ? attr->mode : 0;
1233 }
1234
1235 static struct attribute_group platform_attribute_group = {
1236 .is_visible = samsung_sysfs_is_visible,
1237 .attrs = platform_attributes
1238 };
1239
1240 static void samsung_sysfs_exit(struct samsung_laptop *samsung)
1241 {
1242 struct platform_device *device = samsung->platform_device;
1243
1244 sysfs_remove_group(&device->dev.kobj, &platform_attribute_group);
1245 }
1246
1247 static int __init samsung_sysfs_init(struct samsung_laptop *samsung)
1248 {
1249 struct platform_device *device = samsung->platform_device;
1250
1251 return sysfs_create_group(&device->dev.kobj, &platform_attribute_group);
1252
1253 }
1254
1255 static int show_call(struct seq_file *m, void *data)
1256 {
1257 struct samsung_laptop *samsung = m->private;
1258 struct sabi_data *sdata = &samsung->debug.data;
1259 int ret;
1260
1261 seq_printf(m, "SABI 0x%04x {0x%08x, 0x%08x, 0x%04x, 0x%02x}\n",
1262 samsung->debug.command,
1263 sdata->d0, sdata->d1, sdata->d2, sdata->d3);
1264
1265 ret = sabi_command(samsung, samsung->debug.command, sdata, sdata);
1266
1267 if (ret) {
1268 seq_printf(m, "SABI command 0x%04x failed\n",
1269 samsung->debug.command);
1270 return ret;
1271 }
1272
1273 seq_printf(m, "SABI {0x%08x, 0x%08x, 0x%04x, 0x%02x}\n",
1274 sdata->d0, sdata->d1, sdata->d2, sdata->d3);
1275 return 0;
1276 }
1277
1278 static int samsung_debugfs_open(struct inode *inode, struct file *file)
1279 {
1280 return single_open(file, show_call, inode->i_private);
1281 }
1282
1283 static const struct file_operations samsung_laptop_call_io_ops = {
1284 .owner = THIS_MODULE,
1285 .open = samsung_debugfs_open,
1286 .read = seq_read,
1287 .llseek = seq_lseek,
1288 .release = single_release,
1289 };
1290
1291 static void samsung_debugfs_exit(struct samsung_laptop *samsung)
1292 {
1293 debugfs_remove_recursive(samsung->debug.root);
1294 }
1295
1296 static int samsung_debugfs_init(struct samsung_laptop *samsung)
1297 {
1298 struct dentry *dent;
1299
1300 samsung->debug.root = debugfs_create_dir("samsung-laptop", NULL);
1301 if (!samsung->debug.root) {
1302 pr_err("failed to create debugfs directory");
1303 goto error_debugfs;
1304 }
1305
1306 samsung->debug.f0000_wrapper.data = samsung->f0000_segment;
1307 samsung->debug.f0000_wrapper.size = 0xffff;
1308
1309 samsung->debug.data_wrapper.data = &samsung->debug.data;
1310 samsung->debug.data_wrapper.size = sizeof(samsung->debug.data);
1311
1312 samsung->debug.sdiag_wrapper.data = samsung->sdiag;
1313 samsung->debug.sdiag_wrapper.size = strlen(samsung->sdiag);
1314
1315 dent = debugfs_create_u16("command", S_IRUGO | S_IWUSR,
1316 samsung->debug.root, &samsung->debug.command);
1317 if (!dent)
1318 goto error_debugfs;
1319
1320 dent = debugfs_create_u32("d0", S_IRUGO | S_IWUSR, samsung->debug.root,
1321 &samsung->debug.data.d0);
1322 if (!dent)
1323 goto error_debugfs;
1324
1325 dent = debugfs_create_u32("d1", S_IRUGO | S_IWUSR, samsung->debug.root,
1326 &samsung->debug.data.d1);
1327 if (!dent)
1328 goto error_debugfs;
1329
1330 dent = debugfs_create_u16("d2", S_IRUGO | S_IWUSR, samsung->debug.root,
1331 &samsung->debug.data.d2);
1332 if (!dent)
1333 goto error_debugfs;
1334
1335 dent = debugfs_create_u8("d3", S_IRUGO | S_IWUSR, samsung->debug.root,
1336 &samsung->debug.data.d3);
1337 if (!dent)
1338 goto error_debugfs;
1339
1340 dent = debugfs_create_blob("data", S_IRUGO | S_IWUSR,
1341 samsung->debug.root,
1342 &samsung->debug.data_wrapper);
1343 if (!dent)
1344 goto error_debugfs;
1345
1346 dent = debugfs_create_blob("f0000_segment", S_IRUSR | S_IWUSR,
1347 samsung->debug.root,
1348 &samsung->debug.f0000_wrapper);
1349 if (!dent)
1350 goto error_debugfs;
1351
1352 dent = debugfs_create_file("call", S_IFREG | S_IRUGO,
1353 samsung->debug.root, samsung,
1354 &samsung_laptop_call_io_ops);
1355 if (!dent)
1356 goto error_debugfs;
1357
1358 dent = debugfs_create_blob("sdiag", S_IRUGO | S_IWUSR,
1359 samsung->debug.root,
1360 &samsung->debug.sdiag_wrapper);
1361 if (!dent)
1362 goto error_debugfs;
1363
1364 return 0;
1365
1366 error_debugfs:
1367 samsung_debugfs_exit(samsung);
1368 return -ENOMEM;
1369 }
1370
1371 static void samsung_sabi_exit(struct samsung_laptop *samsung)
1372 {
1373 const struct sabi_config *config = samsung->config;
1374
1375 /* Turn off "Linux" mode in the BIOS */
1376 if (config && config->commands.set_linux != 0xff)
1377 sabi_set_commandb(samsung, config->commands.set_linux, 0x80);
1378
1379 if (samsung->sabi_iface) {
1380 iounmap(samsung->sabi_iface);
1381 samsung->sabi_iface = NULL;
1382 }
1383 if (samsung->f0000_segment) {
1384 iounmap(samsung->f0000_segment);
1385 samsung->f0000_segment = NULL;
1386 }
1387
1388 samsung->config = NULL;
1389 }
1390
1391 static __init void samsung_sabi_infos(struct samsung_laptop *samsung, int loca,
1392 unsigned int ifaceP)
1393 {
1394 const struct sabi_config *config = samsung->config;
1395
1396 printk(KERN_DEBUG "This computer supports SABI==%x\n",
1397 loca + 0xf0000 - 6);
1398
1399 printk(KERN_DEBUG "SABI header:\n");
1400 printk(KERN_DEBUG " SMI Port Number = 0x%04x\n",
1401 readw(samsung->sabi + config->header_offsets.port));
1402 printk(KERN_DEBUG " SMI Interface Function = 0x%02x\n",
1403 readb(samsung->sabi + config->header_offsets.iface_func));
1404 printk(KERN_DEBUG " SMI enable memory buffer = 0x%02x\n",
1405 readb(samsung->sabi + config->header_offsets.en_mem));
1406 printk(KERN_DEBUG " SMI restore memory buffer = 0x%02x\n",
1407 readb(samsung->sabi + config->header_offsets.re_mem));
1408 printk(KERN_DEBUG " SABI data offset = 0x%04x\n",
1409 readw(samsung->sabi + config->header_offsets.data_offset));
1410 printk(KERN_DEBUG " SABI data segment = 0x%04x\n",
1411 readw(samsung->sabi + config->header_offsets.data_segment));
1412
1413 printk(KERN_DEBUG " SABI pointer = 0x%08x\n", ifaceP);
1414 }
1415
1416 static void __init samsung_sabi_diag(struct samsung_laptop *samsung)
1417 {
1418 int loca = find_signature(samsung->f0000_segment, "SDiaG@");
1419 int i;
1420
1421 if (loca == 0xffff)
1422 return ;
1423
1424 /* Example:
1425 * Ident: @SDiaG@686XX-N90X3A/966-SEC-07HL-S90X3A
1426 *
1427 * Product name: 90X3A
1428 * BIOS Version: 07HL
1429 */
1430 loca += 1;
1431 for (i = 0; loca < 0xffff && i < sizeof(samsung->sdiag) - 1; loca++) {
1432 char temp = readb(samsung->f0000_segment + loca);
1433
1434 if (isalnum(temp) || temp == '/' || temp == '-')
1435 samsung->sdiag[i++] = temp;
1436 else
1437 break ;
1438 }
1439
1440 if (debug && samsung->sdiag[0])
1441 pr_info("sdiag: %s", samsung->sdiag);
1442 }
1443
1444 static int __init samsung_sabi_init(struct samsung_laptop *samsung)
1445 {
1446 const struct sabi_config *config = NULL;
1447 const struct sabi_commands *commands;
1448 unsigned int ifaceP;
1449 int ret = 0;
1450 int i;
1451 int loca;
1452
1453 samsung->f0000_segment = ioremap_nocache(0xf0000, 0xffff);
1454 if (!samsung->f0000_segment) {
1455 if (debug || force)
1456 pr_err("Can't map the segment at 0xf0000\n");
1457 ret = -EINVAL;
1458 goto exit;
1459 }
1460
1461 samsung_sabi_diag(samsung);
1462
1463 /* Try to find one of the signatures in memory to find the header */
1464 for (i = 0; sabi_configs[i].test_string != NULL; ++i) {
1465 samsung->config = &sabi_configs[i];
1466 loca = find_signature(samsung->f0000_segment,
1467 samsung->config->test_string);
1468 if (loca != 0xffff)
1469 break;
1470 }
1471
1472 if (loca == 0xffff) {
1473 if (debug || force)
1474 pr_err("This computer does not support SABI\n");
1475 ret = -ENODEV;
1476 goto exit;
1477 }
1478
1479 config = samsung->config;
1480 commands = &config->commands;
1481
1482 /* point to the SMI port Number */
1483 loca += 1;
1484 samsung->sabi = (samsung->f0000_segment + loca);
1485
1486 /* Get a pointer to the SABI Interface */
1487 ifaceP = (readw(samsung->sabi + config->header_offsets.data_segment) & 0x0ffff) << 4;
1488 ifaceP += readw(samsung->sabi + config->header_offsets.data_offset) & 0x0ffff;
1489
1490 if (debug)
1491 samsung_sabi_infos(samsung, loca, ifaceP);
1492
1493 samsung->sabi_iface = ioremap_nocache(ifaceP, 16);
1494 if (!samsung->sabi_iface) {
1495 pr_err("Can't remap %x\n", ifaceP);
1496 ret = -EINVAL;
1497 goto exit;
1498 }
1499
1500 /* Turn on "Linux" mode in the BIOS */
1501 if (commands->set_linux != 0xff) {
1502 int retval = sabi_set_commandb(samsung,
1503 commands->set_linux, 0x81);
1504 if (retval) {
1505 pr_warn("Linux mode was not set!\n");
1506 ret = -ENODEV;
1507 goto exit;
1508 }
1509 }
1510
1511 /* Check for stepping quirk */
1512 if (samsung->handle_backlight)
1513 check_for_stepping_quirk(samsung);
1514
1515 pr_info("detected SABI interface: %s\n",
1516 samsung->config->test_string);
1517
1518 exit:
1519 if (ret)
1520 samsung_sabi_exit(samsung);
1521
1522 return ret;
1523 }
1524
1525 static void samsung_platform_exit(struct samsung_laptop *samsung)
1526 {
1527 if (samsung->platform_device) {
1528 platform_device_unregister(samsung->platform_device);
1529 samsung->platform_device = NULL;
1530 }
1531 }
1532
1533 static int samsung_pm_notification(struct notifier_block *nb,
1534 unsigned long val, void *ptr)
1535 {
1536 struct samsung_laptop *samsung;
1537
1538 samsung = container_of(nb, struct samsung_laptop, pm_nb);
1539 if (val == PM_POST_HIBERNATION &&
1540 samsung->quirks->enable_kbd_backlight)
1541 kbd_backlight_enable(samsung);
1542
1543 if (val == PM_POST_HIBERNATION && samsung->quirks->lid_handling)
1544 write_lid_handling(samsung, 1);
1545
1546 return 0;
1547 }
1548
1549 static int __init samsung_platform_init(struct samsung_laptop *samsung)
1550 {
1551 struct platform_device *pdev;
1552
1553 pdev = platform_device_register_simple("samsung", -1, NULL, 0);
1554 if (IS_ERR(pdev))
1555 return PTR_ERR(pdev);
1556
1557 samsung->platform_device = pdev;
1558 platform_set_drvdata(samsung->platform_device, samsung);
1559 return 0;
1560 }
1561
1562 static struct samsung_quirks *quirks;
1563
1564 static int __init samsung_dmi_matched(const struct dmi_system_id *d)
1565 {
1566 quirks = d->driver_data;
1567 return 0;
1568 }
1569
1570 static struct dmi_system_id __initdata samsung_dmi_table[] = {
1571 {
1572 .matches = {
1573 DMI_MATCH(DMI_SYS_VENDOR,
1574 "SAMSUNG ELECTRONICS CO., LTD."),
1575 DMI_MATCH(DMI_CHASSIS_TYPE, "8"), /* Portable */
1576 },
1577 },
1578 {
1579 .matches = {
1580 DMI_MATCH(DMI_SYS_VENDOR,
1581 "SAMSUNG ELECTRONICS CO., LTD."),
1582 DMI_MATCH(DMI_CHASSIS_TYPE, "9"), /* Laptop */
1583 },
1584 },
1585 {
1586 .matches = {
1587 DMI_MATCH(DMI_SYS_VENDOR,
1588 "SAMSUNG ELECTRONICS CO., LTD."),
1589 DMI_MATCH(DMI_CHASSIS_TYPE, "10"), /* Notebook */
1590 },
1591 },
1592 {
1593 .matches = {
1594 DMI_MATCH(DMI_SYS_VENDOR,
1595 "SAMSUNG ELECTRONICS CO., LTD."),
1596 DMI_MATCH(DMI_CHASSIS_TYPE, "14"), /* Sub-Notebook */
1597 },
1598 },
1599 /* DMI ids for laptops with bad Chassis Type */
1600 {
1601 .ident = "R40/R41",
1602 .matches = {
1603 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
1604 DMI_MATCH(DMI_PRODUCT_NAME, "R40/R41"),
1605 DMI_MATCH(DMI_BOARD_NAME, "R40/R41"),
1606 },
1607 },
1608 /* Specific DMI ids for laptop with quirks */
1609 {
1610 .callback = samsung_dmi_matched,
1611 .ident = "N150P",
1612 .matches = {
1613 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
1614 DMI_MATCH(DMI_PRODUCT_NAME, "N150P"),
1615 DMI_MATCH(DMI_BOARD_NAME, "N150P"),
1616 },
1617 .driver_data = &samsung_use_native_backlight,
1618 },
1619 {
1620 .callback = samsung_dmi_matched,
1621 .ident = "N145P/N250P/N260P",
1622 .matches = {
1623 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
1624 DMI_MATCH(DMI_PRODUCT_NAME, "N145P/N250P/N260P"),
1625 DMI_MATCH(DMI_BOARD_NAME, "N145P/N250P/N260P"),
1626 },
1627 .driver_data = &samsung_use_native_backlight,
1628 },
1629 {
1630 .callback = samsung_dmi_matched,
1631 .ident = "N150/N210/N220",
1632 .matches = {
1633 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
1634 DMI_MATCH(DMI_PRODUCT_NAME, "N150/N210/N220"),
1635 DMI_MATCH(DMI_BOARD_NAME, "N150/N210/N220"),
1636 },
1637 .driver_data = &samsung_broken_acpi_video,
1638 },
1639 {
1640 .callback = samsung_dmi_matched,
1641 .ident = "NF110/NF210/NF310",
1642 .matches = {
1643 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
1644 DMI_MATCH(DMI_PRODUCT_NAME, "NF110/NF210/NF310"),
1645 DMI_MATCH(DMI_BOARD_NAME, "NF110/NF210/NF310"),
1646 },
1647 .driver_data = &samsung_broken_acpi_video,
1648 },
1649 {
1650 .callback = samsung_dmi_matched,
1651 .ident = "X360",
1652 .matches = {
1653 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
1654 DMI_MATCH(DMI_PRODUCT_NAME, "X360"),
1655 DMI_MATCH(DMI_BOARD_NAME, "X360"),
1656 },
1657 .driver_data = &samsung_broken_acpi_video,
1658 },
1659 {
1660 .callback = samsung_dmi_matched,
1661 .ident = "N250P",
1662 .matches = {
1663 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
1664 DMI_MATCH(DMI_PRODUCT_NAME, "N250P"),
1665 DMI_MATCH(DMI_BOARD_NAME, "N250P"),
1666 },
1667 .driver_data = &samsung_use_native_backlight,
1668 },
1669 {
1670 .callback = samsung_dmi_matched,
1671 .ident = "NC210",
1672 .matches = {
1673 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
1674 DMI_MATCH(DMI_PRODUCT_NAME, "NC210/NC110"),
1675 DMI_MATCH(DMI_BOARD_NAME, "NC210/NC110"),
1676 },
1677 .driver_data = &samsung_broken_acpi_video,
1678 },
1679 {
1680 .callback = samsung_dmi_matched,
1681 .ident = "730U3E/740U3E",
1682 .matches = {
1683 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
1684 DMI_MATCH(DMI_PRODUCT_NAME, "730U3E/740U3E"),
1685 },
1686 .driver_data = &samsung_np740u3e,
1687 },
1688 {
1689 .callback = samsung_dmi_matched,
1690 .ident = "300V3Z/300V4Z/300V5Z",
1691 .matches = {
1692 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
1693 DMI_MATCH(DMI_PRODUCT_NAME, "300V3Z/300V4Z/300V5Z"),
1694 },
1695 .driver_data = &samsung_lid_handling,
1696 },
1697 { },
1698 };
1699 MODULE_DEVICE_TABLE(dmi, samsung_dmi_table);
1700
1701 static struct platform_device *samsung_platform_device;
1702
1703 static int __init samsung_init(void)
1704 {
1705 struct samsung_laptop *samsung;
1706 int ret;
1707
1708 if (efi_enabled(EFI_BOOT))
1709 return -ENODEV;
1710
1711 quirks = &samsung_unknown;
1712 if (!force && !dmi_check_system(samsung_dmi_table))
1713 return -ENODEV;
1714
1715 samsung = kzalloc(sizeof(*samsung), GFP_KERNEL);
1716 if (!samsung)
1717 return -ENOMEM;
1718
1719 mutex_init(&samsung->sabi_mutex);
1720 samsung->handle_backlight = true;
1721 samsung->quirks = quirks;
1722
1723 #ifdef CONFIG_ACPI
1724 if (samsung->quirks->broken_acpi_video)
1725 acpi_video_set_dmi_backlight_type(acpi_backlight_vendor);
1726 if (samsung->quirks->use_native_backlight)
1727 acpi_video_set_dmi_backlight_type(acpi_backlight_native);
1728
1729 if (acpi_video_get_backlight_type() != acpi_backlight_vendor)
1730 samsung->handle_backlight = false;
1731 #endif
1732
1733 ret = samsung_platform_init(samsung);
1734 if (ret)
1735 goto error_platform;
1736
1737 ret = samsung_sabi_init(samsung);
1738 if (ret)
1739 goto error_sabi;
1740
1741 ret = samsung_sysfs_init(samsung);
1742 if (ret)
1743 goto error_sysfs;
1744
1745 ret = samsung_backlight_init(samsung);
1746 if (ret)
1747 goto error_backlight;
1748
1749 ret = samsung_rfkill_init(samsung);
1750 if (ret)
1751 goto error_rfkill;
1752
1753 ret = samsung_leds_init(samsung);
1754 if (ret)
1755 goto error_leds;
1756
1757 ret = samsung_lid_handling_init(samsung);
1758 if (ret)
1759 goto error_lid_handling;
1760
1761 ret = samsung_debugfs_init(samsung);
1762 if (ret)
1763 goto error_debugfs;
1764
1765 samsung->pm_nb.notifier_call = samsung_pm_notification;
1766 register_pm_notifier(&samsung->pm_nb);
1767
1768 samsung_platform_device = samsung->platform_device;
1769 return ret;
1770
1771 error_debugfs:
1772 samsung_lid_handling_exit(samsung);
1773 error_lid_handling:
1774 samsung_leds_exit(samsung);
1775 error_leds:
1776 samsung_rfkill_exit(samsung);
1777 error_rfkill:
1778 samsung_backlight_exit(samsung);
1779 error_backlight:
1780 samsung_sysfs_exit(samsung);
1781 error_sysfs:
1782 samsung_sabi_exit(samsung);
1783 error_sabi:
1784 samsung_platform_exit(samsung);
1785 error_platform:
1786 kfree(samsung);
1787 return ret;
1788 }
1789
1790 static void __exit samsung_exit(void)
1791 {
1792 struct samsung_laptop *samsung;
1793
1794 samsung = platform_get_drvdata(samsung_platform_device);
1795 unregister_pm_notifier(&samsung->pm_nb);
1796
1797 samsung_debugfs_exit(samsung);
1798 samsung_lid_handling_exit(samsung);
1799 samsung_leds_exit(samsung);
1800 samsung_rfkill_exit(samsung);
1801 samsung_backlight_exit(samsung);
1802 samsung_sysfs_exit(samsung);
1803 samsung_sabi_exit(samsung);
1804 samsung_platform_exit(samsung);
1805
1806 kfree(samsung);
1807 samsung_platform_device = NULL;
1808 }
1809
1810 module_init(samsung_init);
1811 module_exit(samsung_exit);
1812
1813 MODULE_AUTHOR("Greg Kroah-Hartman <gregkh@suse.de>");
1814 MODULE_DESCRIPTION("Samsung Backlight driver");
1815 MODULE_LICENSE("GPL");
Linux with added FPC-III support