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Merge tag 'regmap-fix-v5.11-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git...
[linux/fpc-iii.git] / drivers / platform / x86 / samsung-laptop.c
blobd5cec6e35bb83618e74168bfbffd31de2f5bf2a8
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Samsung Laptop driver
4 *
5 * Copyright (C) 2009,2011 Greg Kroah-Hartman (gregkh@suse.de)
6 * Copyright (C) 2009,2011 Novell Inc.
7 */
8 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
9
10 #include <linux/kernel.h>
11 #include <linux/init.h>
12 #include <linux/module.h>
13 #include <linux/delay.h>
14 #include <linux/pci.h>
15 #include <linux/backlight.h>
16 #include <linux/leds.h>
17 #include <linux/fb.h>
18 #include <linux/dmi.h>
19 #include <linux/platform_device.h>
20 #include <linux/rfkill.h>
21 #include <linux/acpi.h>
22 #include <linux/seq_file.h>
23 #include <linux/debugfs.h>
24 #include <linux/ctype.h>
25 #include <linux/efi.h>
26 #include <linux/suspend.h>
27 #include <acpi/video.h>
28
29 /*
30 * This driver is needed because a number of Samsung laptops do not hook
31 * their control settings through ACPI. So we have to poke around in the
32 * BIOS to do things like brightness values, and "special" key controls.
33 */
34
35 /*
36 * We have 0 - 8 as valid brightness levels. The specs say that level 0 should
37 * be reserved by the BIOS (which really doesn't make much sense), we tell
38 * userspace that the value is 0 - 7 and then just tell the hardware 1 - 8
39 */
40 #define MAX_BRIGHT 0x07
41
42
43 #define SABI_IFACE_MAIN 0x00
44 #define SABI_IFACE_SUB 0x02
45 #define SABI_IFACE_COMPLETE 0x04
46 #define SABI_IFACE_DATA 0x05
47
48 #define WL_STATUS_WLAN 0x0
49 #define WL_STATUS_BT 0x2
50
51 /* Structure get/set data using sabi */
52 struct sabi_data {
53 union {
54 struct {
55 u32 d0;
56 u32 d1;
57 u16 d2;
58 u8 d3;
59 };
60 u8 data[11];
61 };
62 };
63
64 struct sabi_header_offsets {
65 u8 port;
66 u8 re_mem;
67 u8 iface_func;
68 u8 en_mem;
69 u8 data_offset;
70 u8 data_segment;
71 };
72
73 struct sabi_commands {
74 /*
75 * Brightness is 0 - 8, as described above.
76 * Value 0 is for the BIOS to use
77 */
78 u16 get_brightness;
79 u16 set_brightness;
80
81 /*
82 * first byte:
83 * 0x00 - wireless is off
84 * 0x01 - wireless is on
85 * second byte:
86 * 0x02 - 3G is off
87 * 0x03 - 3G is on
88 * TODO, verify 3G is correct, that doesn't seem right...
89 */
90 u16 get_wireless_button;
91 u16 set_wireless_button;
92
93 /* 0 is off, 1 is on */
94 u16 get_backlight;
95 u16 set_backlight;
96
97 /*
98 * 0x80 or 0x00 - no action
99 * 0x81 - recovery key pressed
100 */
101 u16 get_recovery_mode;
102 u16 set_recovery_mode;
103
104 /*
105 * on seclinux: 0 is low, 1 is high,
106 * on swsmi: 0 is normal, 1 is silent, 2 is turbo
107 */
108 u16 get_performance_level;
109 u16 set_performance_level;
110
111 /* 0x80 is off, 0x81 is on */
112 u16 get_battery_life_extender;
113 u16 set_battery_life_extender;
114
115 /* 0x80 is off, 0x81 is on */
116 u16 get_usb_charge;
117 u16 set_usb_charge;
118
119 /* the first byte is for bluetooth and the third one is for wlan */
120 u16 get_wireless_status;
121 u16 set_wireless_status;
122
123 /* 0x80 is off, 0x81 is on */
124 u16 get_lid_handling;
125 u16 set_lid_handling;
126
127 /* 0x81 to read, (0x82 | level << 8) to set, 0xaabb to enable */
128 u16 kbd_backlight;
129
130 /*
131 * Tell the BIOS that Linux is running on this machine.
132 * 81 is on, 80 is off
133 */
134 u16 set_linux;
135 };
136
137 struct sabi_performance_level {
138 const char *name;
139 u16 value;
140 };
141
142 struct sabi_config {
143 int sabi_version;
144 const char *test_string;
145 u16 main_function;
146 const struct sabi_header_offsets header_offsets;
147 const struct sabi_commands commands;
148 const struct sabi_performance_level performance_levels[4];
149 u8 min_brightness;
150 u8 max_brightness;
151 };
152
153 static const struct sabi_config sabi_configs[] = {
154 {
155 /* I don't know if it is really 2, but it it is
156 * less than 3 anyway */
157 .sabi_version = 2,
158
159 .test_string = "SECLINUX",
160
161 .main_function = 0x4c49,
162
163 .header_offsets = {
164 .port = 0x00,
165 .re_mem = 0x02,
166 .iface_func = 0x03,
167 .en_mem = 0x04,
168 .data_offset = 0x05,
169 .data_segment = 0x07,
170 },
171
172 .commands = {
173 .get_brightness = 0x00,
174 .set_brightness = 0x01,
175
176 .get_wireless_button = 0x02,
177 .set_wireless_button = 0x03,
178
179 .get_backlight = 0x04,
180 .set_backlight = 0x05,
181
182 .get_recovery_mode = 0x06,
183 .set_recovery_mode = 0x07,
184
185 .get_performance_level = 0x08,
186 .set_performance_level = 0x09,
187
188 .get_battery_life_extender = 0xFFFF,
189 .set_battery_life_extender = 0xFFFF,
190
191 .get_usb_charge = 0xFFFF,
192 .set_usb_charge = 0xFFFF,
193
194 .get_wireless_status = 0xFFFF,
195 .set_wireless_status = 0xFFFF,
196
197 .get_lid_handling = 0xFFFF,
198 .set_lid_handling = 0xFFFF,
199
200 .kbd_backlight = 0xFFFF,
201
202 .set_linux = 0x0a,
203 },
204
205 .performance_levels = {
206 {
207 .name = "silent",
208 .value = 0,
209 },
210 {
211 .name = "normal",
212 .value = 1,
213 },
214 { },
215 },
216 .min_brightness = 1,
217 .max_brightness = 8,
218 },
219 {
220 .sabi_version = 3,
221
222 .test_string = "SwSmi@",
223
224 .main_function = 0x5843,
225
226 .header_offsets = {
227 .port = 0x00,
228 .re_mem = 0x04,
229 .iface_func = 0x02,
230 .en_mem = 0x03,
231 .data_offset = 0x05,
232 .data_segment = 0x07,
233 },
234
235 .commands = {
236 .get_brightness = 0x10,
237 .set_brightness = 0x11,
238
239 .get_wireless_button = 0x12,
240 .set_wireless_button = 0x13,
241
242 .get_backlight = 0x2d,
243 .set_backlight = 0x2e,
244
245 .get_recovery_mode = 0xff,
246 .set_recovery_mode = 0xff,
247
248 .get_performance_level = 0x31,
249 .set_performance_level = 0x32,
250
251 .get_battery_life_extender = 0x65,
252 .set_battery_life_extender = 0x66,
253
254 .get_usb_charge = 0x67,
255 .set_usb_charge = 0x68,
256
257 .get_wireless_status = 0x69,
258 .set_wireless_status = 0x6a,
259
260 .get_lid_handling = 0x6d,
261 .set_lid_handling = 0x6e,
262
263 .kbd_backlight = 0x78,
264
265 .set_linux = 0xff,
266 },
267
268 .performance_levels = {
269 {
270 .name = "normal",
271 .value = 0,
272 },
273 {
274 .name = "silent",
275 .value = 1,
276 },
277 {
278 .name = "overclock",
279 .value = 2,
280 },
281 { },
282 },
283 .min_brightness = 0,
284 .max_brightness = 8,
285 },
286 { },
287 };
288
289 /*
290 * samsung-laptop/ - debugfs root directory
291 * f0000_segment - dump f0000 segment
292 * command - current command
293 * data - current data
294 * d0, d1, d2, d3 - data fields
295 * call - call SABI using command and data
296 *
297 * This allow to call arbitrary sabi commands wihout
298 * modifying the driver at all.
299 * For example, setting the keyboard backlight brightness to 5
300 *
301 * echo 0x78 > command
302 * echo 0x0582 > d0
303 * echo 0 > d1
304 * echo 0 > d2
305 * echo 0 > d3
306 * cat call
307 */
308
309 struct samsung_laptop_debug {
310 struct dentry *root;
311 struct sabi_data data;
312 u16 command;
313
314 struct debugfs_blob_wrapper f0000_wrapper;
315 struct debugfs_blob_wrapper data_wrapper;
316 struct debugfs_blob_wrapper sdiag_wrapper;
317 };
318
319 struct samsung_laptop;
320
321 struct samsung_rfkill {
322 struct samsung_laptop *samsung;
323 struct rfkill *rfkill;
324 enum rfkill_type type;
325 };
326
327 struct samsung_laptop {
328 const struct sabi_config *config;
329
330 void __iomem *sabi;
331 void __iomem *sabi_iface;
332 void __iomem *f0000_segment;
333
334 struct mutex sabi_mutex;
335
336 struct platform_device *platform_device;
337 struct backlight_device *backlight_device;
338
339 struct samsung_rfkill wlan;
340 struct samsung_rfkill bluetooth;
341
342 struct led_classdev kbd_led;
343 int kbd_led_wk;
344 struct workqueue_struct *led_workqueue;
345 struct work_struct kbd_led_work;
346
347 struct samsung_laptop_debug debug;
348 struct samsung_quirks *quirks;
349
350 struct notifier_block pm_nb;
351
352 bool handle_backlight;
353 bool has_stepping_quirk;
354
355 char sdiag[64];
356 };
357
358 struct samsung_quirks {
359 bool broken_acpi_video;
360 bool four_kbd_backlight_levels;
361 bool enable_kbd_backlight;
362 bool use_native_backlight;
363 bool lid_handling;
364 };
365
366 static struct samsung_quirks samsung_unknown = {};
367
368 static struct samsung_quirks samsung_broken_acpi_video = {
369 .broken_acpi_video = true,
370 };
371
372 static struct samsung_quirks samsung_use_native_backlight = {
373 .use_native_backlight = true,
374 };
375
376 static struct samsung_quirks samsung_np740u3e = {
377 .four_kbd_backlight_levels = true,
378 .enable_kbd_backlight = true,
379 };
380
381 static struct samsung_quirks samsung_lid_handling = {
382 .lid_handling = true,
383 };
384
385 static bool force;
386 module_param(force, bool, 0);
387 MODULE_PARM_DESC(force,
388 "Disable the DMI check and forces the driver to be loaded");
389
390 static bool debug;
391 module_param(debug, bool, S_IRUGO | S_IWUSR);
392 MODULE_PARM_DESC(debug, "Debug enabled or not");
393
394 static int sabi_command(struct samsung_laptop *samsung, u16 command,
395 struct sabi_data *in,
396 struct sabi_data *out)
397 {
398 const struct sabi_config *config = samsung->config;
399 int ret = 0;
400 u16 port = readw(samsung->sabi + config->header_offsets.port);
401 u8 complete, iface_data;
402
403 mutex_lock(&samsung->sabi_mutex);
404
405 if (debug) {
406 if (in)
407 pr_info("SABI command:0x%04x "
408 "data:{0x%08x, 0x%08x, 0x%04x, 0x%02x}",
409 command, in->d0, in->d1, in->d2, in->d3);
410 else
411 pr_info("SABI command:0x%04x", command);
412 }
413
414 /* enable memory to be able to write to it */
415 outb(readb(samsung->sabi + config->header_offsets.en_mem), port);
416
417 /* write out the command */
418 writew(config->main_function, samsung->sabi_iface + SABI_IFACE_MAIN);
419 writew(command, samsung->sabi_iface + SABI_IFACE_SUB);
420 writeb(0, samsung->sabi_iface + SABI_IFACE_COMPLETE);
421 if (in) {
422 writel(in->d0, samsung->sabi_iface + SABI_IFACE_DATA);
423 writel(in->d1, samsung->sabi_iface + SABI_IFACE_DATA + 4);
424 writew(in->d2, samsung->sabi_iface + SABI_IFACE_DATA + 8);
425 writeb(in->d3, samsung->sabi_iface + SABI_IFACE_DATA + 10);
426 }
427 outb(readb(samsung->sabi + config->header_offsets.iface_func), port);
428
429 /* write protect memory to make it safe */
430 outb(readb(samsung->sabi + config->header_offsets.re_mem), port);
431
432 /* see if the command actually succeeded */
433 complete = readb(samsung->sabi_iface + SABI_IFACE_COMPLETE);
434 iface_data = readb(samsung->sabi_iface + SABI_IFACE_DATA);
435
436 /* iface_data = 0xFF happens when a command is not known
437 * so we only add a warning in debug mode since we will
438 * probably issue some unknown command at startup to find
439 * out which features are supported */
440 if (complete != 0xaa || (iface_data == 0xff && debug))
441 pr_warn("SABI command 0x%04x failed with"
442 " completion flag 0x%02x and interface data 0x%02x",
443 command, complete, iface_data);
444
445 if (complete != 0xaa || iface_data == 0xff) {
446 ret = -EINVAL;
447 goto exit;
448 }
449
450 if (out) {
451 out->d0 = readl(samsung->sabi_iface + SABI_IFACE_DATA);
452 out->d1 = readl(samsung->sabi_iface + SABI_IFACE_DATA + 4);
453 out->d2 = readw(samsung->sabi_iface + SABI_IFACE_DATA + 2);
454 out->d3 = readb(samsung->sabi_iface + SABI_IFACE_DATA + 1);
455 }
456
457 if (debug && out) {
458 pr_info("SABI return data:{0x%08x, 0x%08x, 0x%04x, 0x%02x}",
459 out->d0, out->d1, out->d2, out->d3);
460 }
461
462 exit:
463 mutex_unlock(&samsung->sabi_mutex);
464 return ret;
465 }
466
467 /* simple wrappers usable with most commands */
468 static int sabi_set_commandb(struct samsung_laptop *samsung,
469 u16 command, u8 data)
470 {
471 struct sabi_data in = { { { .d0 = 0, .d1 = 0, .d2 = 0, .d3 = 0 } } };
472
473 in.data[0] = data;
474 return sabi_command(samsung, command, &in, NULL);
475 }
476
477 static int read_brightness(struct samsung_laptop *samsung)
478 {
479 const struct sabi_config *config = samsung->config;
480 const struct sabi_commands *commands = &samsung->config->commands;
481 struct sabi_data sretval;
482 int user_brightness = 0;
483 int retval;
484
485 retval = sabi_command(samsung, commands->get_brightness,
486 NULL, &sretval);
487 if (retval)
488 return retval;
489
490 user_brightness = sretval.data[0];
491 if (user_brightness > config->min_brightness)
492 user_brightness -= config->min_brightness;
493 else
494 user_brightness = 0;
495
496 return user_brightness;
497 }
498
499 static void set_brightness(struct samsung_laptop *samsung, u8 user_brightness)
500 {
501 const struct sabi_config *config = samsung->config;
502 const struct sabi_commands *commands = &samsung->config->commands;
503 u8 user_level = user_brightness + config->min_brightness;
504
505 if (samsung->has_stepping_quirk && user_level != 0) {
506 /*
507 * short circuit if the specified level is what's already set
508 * to prevent the screen from flickering needlessly
509 */
510 if (user_brightness == read_brightness(samsung))
511 return;
512
513 sabi_set_commandb(samsung, commands->set_brightness, 0);
514 }
515
516 sabi_set_commandb(samsung, commands->set_brightness, user_level);
517 }
518
519 static int get_brightness(struct backlight_device *bd)
520 {
521 struct samsung_laptop *samsung = bl_get_data(bd);
522
523 return read_brightness(samsung);
524 }
525
526 static void check_for_stepping_quirk(struct samsung_laptop *samsung)
527 {
528 int initial_level;
529 int check_level;
530 int orig_level = read_brightness(samsung);
531
532 /*
533 * Some laptops exhibit the strange behaviour of stepping toward
534 * (rather than setting) the brightness except when changing to/from
535 * brightness level 0. This behaviour is checked for here and worked
536 * around in set_brightness.
537 */
538
539 if (orig_level == 0)
540 set_brightness(samsung, 1);
541
542 initial_level = read_brightness(samsung);
543
544 if (initial_level <= 2)
545 check_level = initial_level + 2;
546 else
547 check_level = initial_level - 2;
548
549 samsung->has_stepping_quirk = false;
550 set_brightness(samsung, check_level);
551
552 if (read_brightness(samsung) != check_level) {
553 samsung->has_stepping_quirk = true;
554 pr_info("enabled workaround for brightness stepping quirk\n");
555 }
556
557 set_brightness(samsung, orig_level);
558 }
559
560 static int update_status(struct backlight_device *bd)
561 {
562 struct samsung_laptop *samsung = bl_get_data(bd);
563 const struct sabi_commands *commands = &samsung->config->commands;
564
565 set_brightness(samsung, bd->props.brightness);
566
567 if (bd->props.power == FB_BLANK_UNBLANK)
568 sabi_set_commandb(samsung, commands->set_backlight, 1);
569 else
570 sabi_set_commandb(samsung, commands->set_backlight, 0);
571
572 return 0;
573 }
574
575 static const struct backlight_ops backlight_ops = {
576 .get_brightness = get_brightness,
577 .update_status = update_status,
578 };
579
580 static int seclinux_rfkill_set(void *data, bool blocked)
581 {
582 struct samsung_rfkill *srfkill = data;
583 struct samsung_laptop *samsung = srfkill->samsung;
584 const struct sabi_commands *commands = &samsung->config->commands;
585
586 return sabi_set_commandb(samsung, commands->set_wireless_button,
587 !blocked);
588 }
589
590 static const struct rfkill_ops seclinux_rfkill_ops = {
591 .set_block = seclinux_rfkill_set,
592 };
593
594 static int swsmi_wireless_status(struct samsung_laptop *samsung,
595 struct sabi_data *data)
596 {
597 const struct sabi_commands *commands = &samsung->config->commands;
598
599 return sabi_command(samsung, commands->get_wireless_status,
600 NULL, data);
601 }
602
603 static int swsmi_rfkill_set(void *priv, bool blocked)
604 {
605 struct samsung_rfkill *srfkill = priv;
606 struct samsung_laptop *samsung = srfkill->samsung;
607 const struct sabi_commands *commands = &samsung->config->commands;
608 struct sabi_data data;
609 int ret, i;
610
611 ret = swsmi_wireless_status(samsung, &data);
612 if (ret)
613 return ret;
614
615 /* Don't set the state for non-present devices */
616 for (i = 0; i < 4; i++)
617 if (data.data[i] == 0x02)
618 data.data[1] = 0;
619
620 if (srfkill->type == RFKILL_TYPE_WLAN)
621 data.data[WL_STATUS_WLAN] = !blocked;
622 else if (srfkill->type == RFKILL_TYPE_BLUETOOTH)
623 data.data[WL_STATUS_BT] = !blocked;
624
625 return sabi_command(samsung, commands->set_wireless_status,
626 &data, &data);
627 }
628
629 static void swsmi_rfkill_query(struct rfkill *rfkill, void *priv)
630 {
631 struct samsung_rfkill *srfkill = priv;
632 struct samsung_laptop *samsung = srfkill->samsung;
633 struct sabi_data data;
634 int ret;
635
636 ret = swsmi_wireless_status(samsung, &data);
637 if (ret)
638 return ;
639
640 if (srfkill->type == RFKILL_TYPE_WLAN)
641 ret = data.data[WL_STATUS_WLAN];
642 else if (srfkill->type == RFKILL_TYPE_BLUETOOTH)
643 ret = data.data[WL_STATUS_BT];
644 else
645 return ;
646
647 rfkill_set_sw_state(rfkill, !ret);
648 }
649
650 static const struct rfkill_ops swsmi_rfkill_ops = {
651 .set_block = swsmi_rfkill_set,
652 .query = swsmi_rfkill_query,
653 };
654
655 static ssize_t get_performance_level(struct device *dev,
656 struct device_attribute *attr, char *buf)
657 {
658 struct samsung_laptop *samsung = dev_get_drvdata(dev);
659 const struct sabi_config *config = samsung->config;
660 const struct sabi_commands *commands = &config->commands;
661 struct sabi_data sretval;
662 int retval;
663 int i;
664
665 /* Read the state */
666 retval = sabi_command(samsung, commands->get_performance_level,
667 NULL, &sretval);
668 if (retval)
669 return retval;
670
671 /* The logic is backwards, yeah, lots of fun... */
672 for (i = 0; config->performance_levels[i].name; ++i) {
673 if (sretval.data[0] == config->performance_levels[i].value)
674 return sprintf(buf, "%s\n", config->performance_levels[i].name);
675 }
676 return sprintf(buf, "%s\n", "unknown");
677 }
678
679 static ssize_t set_performance_level(struct device *dev,
680 struct device_attribute *attr, const char *buf,
681 size_t count)
682 {
683 struct samsung_laptop *samsung = dev_get_drvdata(dev);
684 const struct sabi_config *config = samsung->config;
685 const struct sabi_commands *commands = &config->commands;
686 int i;
687
688 if (count < 1)
689 return count;
690
691 for (i = 0; config->performance_levels[i].name; ++i) {
692 const struct sabi_performance_level *level =
693 &config->performance_levels[i];
694 if (!strncasecmp(level->name, buf, strlen(level->name))) {
695 sabi_set_commandb(samsung,
696 commands->set_performance_level,
697 level->value);
698 break;
699 }
700 }
701
702 if (!config->performance_levels[i].name)
703 return -EINVAL;
704
705 return count;
706 }
707
708 static DEVICE_ATTR(performance_level, S_IWUSR | S_IRUGO,
709 get_performance_level, set_performance_level);
710
711 static int read_battery_life_extender(struct samsung_laptop *samsung)
712 {
713 const struct sabi_commands *commands = &samsung->config->commands;
714 struct sabi_data data;
715 int retval;
716
717 if (commands->get_battery_life_extender == 0xFFFF)
718 return -ENODEV;
719
720 memset(&data, 0, sizeof(data));
721 data.data[0] = 0x80;
722 retval = sabi_command(samsung, commands->get_battery_life_extender,
723 &data, &data);
724
725 if (retval)
726 return retval;
727
728 if (data.data[0] != 0 && data.data[0] != 1)
729 return -ENODEV;
730
731 return data.data[0];
732 }
733
734 static int write_battery_life_extender(struct samsung_laptop *samsung,
735 int enabled)
736 {
737 const struct sabi_commands *commands = &samsung->config->commands;
738 struct sabi_data data;
739
740 memset(&data, 0, sizeof(data));
741 data.data[0] = 0x80 | enabled;
742 return sabi_command(samsung, commands->set_battery_life_extender,
743 &data, NULL);
744 }
745
746 static ssize_t get_battery_life_extender(struct device *dev,
747 struct device_attribute *attr,
748 char *buf)
749 {
750 struct samsung_laptop *samsung = dev_get_drvdata(dev);
751 int ret;
752
753 ret = read_battery_life_extender(samsung);
754 if (ret < 0)
755 return ret;
756
757 return sprintf(buf, "%d\n", ret);
758 }
759
760 static ssize_t set_battery_life_extender(struct device *dev,
761 struct device_attribute *attr,
762 const char *buf, size_t count)
763 {
764 struct samsung_laptop *samsung = dev_get_drvdata(dev);
765 int ret, value;
766
767 if (!count || kstrtoint(buf, 0, &value) != 0)
768 return -EINVAL;
769
770 ret = write_battery_life_extender(samsung, !!value);
771 if (ret < 0)
772 return ret;
773
774 return count;
775 }
776
777 static DEVICE_ATTR(battery_life_extender, S_IWUSR | S_IRUGO,
778 get_battery_life_extender, set_battery_life_extender);
779
780 static int read_usb_charge(struct samsung_laptop *samsung)
781 {
782 const struct sabi_commands *commands = &samsung->config->commands;
783 struct sabi_data data;
784 int retval;
785
786 if (commands->get_usb_charge == 0xFFFF)
787 return -ENODEV;
788
789 memset(&data, 0, sizeof(data));
790 data.data[0] = 0x80;
791 retval = sabi_command(samsung, commands->get_usb_charge,
792 &data, &data);
793
794 if (retval)
795 return retval;
796
797 if (data.data[0] != 0 && data.data[0] != 1)
798 return -ENODEV;
799
800 return data.data[0];
801 }
802
803 static int write_usb_charge(struct samsung_laptop *samsung,
804 int enabled)
805 {
806 const struct sabi_commands *commands = &samsung->config->commands;
807 struct sabi_data data;
808
809 memset(&data, 0, sizeof(data));
810 data.data[0] = 0x80 | enabled;
811 return sabi_command(samsung, commands->set_usb_charge,
812 &data, NULL);
813 }
814
815 static ssize_t get_usb_charge(struct device *dev,
816 struct device_attribute *attr,
817 char *buf)
818 {
819 struct samsung_laptop *samsung = dev_get_drvdata(dev);
820 int ret;
821
822 ret = read_usb_charge(samsung);
823 if (ret < 0)
824 return ret;
825
826 return sprintf(buf, "%d\n", ret);
827 }
828
829 static ssize_t set_usb_charge(struct device *dev,
830 struct device_attribute *attr,
831 const char *buf, size_t count)
832 {
833 struct samsung_laptop *samsung = dev_get_drvdata(dev);
834 int ret, value;
835
836 if (!count || kstrtoint(buf, 0, &value) != 0)
837 return -EINVAL;
838
839 ret = write_usb_charge(samsung, !!value);
840 if (ret < 0)
841 return ret;
842
843 return count;
844 }
845
846 static DEVICE_ATTR(usb_charge, S_IWUSR | S_IRUGO,
847 get_usb_charge, set_usb_charge);
848
849 static int read_lid_handling(struct samsung_laptop *samsung)
850 {
851 const struct sabi_commands *commands = &samsung->config->commands;
852 struct sabi_data data;
853 int retval;
854
855 if (commands->get_lid_handling == 0xFFFF)
856 return -ENODEV;
857
858 memset(&data, 0, sizeof(data));
859 retval = sabi_command(samsung, commands->get_lid_handling,
860 &data, &data);
861
862 if (retval)
863 return retval;
864
865 return data.data[0] & 0x1;
866 }
867
868 static int write_lid_handling(struct samsung_laptop *samsung,
869 int enabled)
870 {
871 const struct sabi_commands *commands = &samsung->config->commands;
872 struct sabi_data data;
873
874 memset(&data, 0, sizeof(data));
875 data.data[0] = 0x80 | enabled;
876 return sabi_command(samsung, commands->set_lid_handling,
877 &data, NULL);
878 }
879
880 static ssize_t get_lid_handling(struct device *dev,
881 struct device_attribute *attr,
882 char *buf)
883 {
884 struct samsung_laptop *samsung = dev_get_drvdata(dev);
885 int ret;
886
887 ret = read_lid_handling(samsung);
888 if (ret < 0)
889 return ret;
890
891 return sprintf(buf, "%d\n", ret);
892 }
893
894 static ssize_t set_lid_handling(struct device *dev,
895 struct device_attribute *attr,
896 const char *buf, size_t count)
897 {
898 struct samsung_laptop *samsung = dev_get_drvdata(dev);
899 int ret, value;
900
901 if (!count || kstrtoint(buf, 0, &value) != 0)
902 return -EINVAL;
903
904 ret = write_lid_handling(samsung, !!value);
905 if (ret < 0)
906 return ret;
907
908 return count;
909 }
910
911 static DEVICE_ATTR(lid_handling, S_IWUSR | S_IRUGO,
912 get_lid_handling, set_lid_handling);
913
914 static struct attribute *platform_attributes[] = {
915 &dev_attr_performance_level.attr,
916 &dev_attr_battery_life_extender.attr,
917 &dev_attr_usb_charge.attr,
918 &dev_attr_lid_handling.attr,
919 NULL
920 };
921
922 static int find_signature(void __iomem *memcheck, const char *testStr)
923 {
924 int i = 0;
925 int loca;
926
927 for (loca = 0; loca < 0xffff; loca++) {
928 char temp = readb(memcheck + loca);
929
930 if (temp == testStr[i]) {
931 if (i == strlen(testStr)-1)
932 break;
933 ++i;
934 } else {
935 i = 0;
936 }
937 }
938 return loca;
939 }
940
941 static void samsung_rfkill_exit(struct samsung_laptop *samsung)
942 {
943 if (samsung->wlan.rfkill) {
944 rfkill_unregister(samsung->wlan.rfkill);
945 rfkill_destroy(samsung->wlan.rfkill);
946 samsung->wlan.rfkill = NULL;
947 }
948 if (samsung->bluetooth.rfkill) {
949 rfkill_unregister(samsung->bluetooth.rfkill);
950 rfkill_destroy(samsung->bluetooth.rfkill);
951 samsung->bluetooth.rfkill = NULL;
952 }
953 }
954
955 static int samsung_new_rfkill(struct samsung_laptop *samsung,
956 struct samsung_rfkill *arfkill,
957 const char *name, enum rfkill_type type,
958 const struct rfkill_ops *ops,
959 int blocked)
960 {
961 struct rfkill **rfkill = &arfkill->rfkill;
962 int ret;
963
964 arfkill->type = type;
965 arfkill->samsung = samsung;
966
967 *rfkill = rfkill_alloc(name, &samsung->platform_device->dev,
968 type, ops, arfkill);
969
970 if (!*rfkill)
971 return -EINVAL;
972
973 if (blocked != -1)
974 rfkill_init_sw_state(*rfkill, blocked);
975
976 ret = rfkill_register(*rfkill);
977 if (ret) {
978 rfkill_destroy(*rfkill);
979 *rfkill = NULL;
980 return ret;
981 }
982 return 0;
983 }
984
985 static int __init samsung_rfkill_init_seclinux(struct samsung_laptop *samsung)
986 {
987 return samsung_new_rfkill(samsung, &samsung->wlan, "samsung-wlan",
988 RFKILL_TYPE_WLAN, &seclinux_rfkill_ops, -1);
989 }
990
991 static int __init samsung_rfkill_init_swsmi(struct samsung_laptop *samsung)
992 {
993 struct sabi_data data;
994 int ret;
995
996 ret = swsmi_wireless_status(samsung, &data);
997 if (ret) {
998 /* Some swsmi laptops use the old seclinux way to control
999 * wireless devices */
1000 if (ret == -EINVAL)
1001 ret = samsung_rfkill_init_seclinux(samsung);
1002 return ret;
1003 }
1004
1005 /* 0x02 seems to mean that the device is no present/available */
1006
1007 if (data.data[WL_STATUS_WLAN] != 0x02)
1008 ret = samsung_new_rfkill(samsung, &samsung->wlan,
1009 "samsung-wlan",
1010 RFKILL_TYPE_WLAN,
1011 &swsmi_rfkill_ops,
1012 !data.data[WL_STATUS_WLAN]);
1013 if (ret)
1014 goto exit;
1015
1016 if (data.data[WL_STATUS_BT] != 0x02)
1017 ret = samsung_new_rfkill(samsung, &samsung->bluetooth,
1018 "samsung-bluetooth",
1019 RFKILL_TYPE_BLUETOOTH,
1020 &swsmi_rfkill_ops,
1021 !data.data[WL_STATUS_BT]);
1022 if (ret)
1023 goto exit;
1024
1025 exit:
1026 if (ret)
1027 samsung_rfkill_exit(samsung);
1028
1029 return ret;
1030 }
1031
1032 static int __init samsung_rfkill_init(struct samsung_laptop *samsung)
1033 {
1034 if (samsung->config->sabi_version == 2)
1035 return samsung_rfkill_init_seclinux(samsung);
1036 if (samsung->config->sabi_version == 3)
1037 return samsung_rfkill_init_swsmi(samsung);
1038 return 0;
1039 }
1040
1041 static void samsung_lid_handling_exit(struct samsung_laptop *samsung)
1042 {
1043 if (samsung->quirks->lid_handling)
1044 write_lid_handling(samsung, 0);
1045 }
1046
1047 static int __init samsung_lid_handling_init(struct samsung_laptop *samsung)
1048 {
1049 int retval = 0;
1050
1051 if (samsung->quirks->lid_handling)
1052 retval = write_lid_handling(samsung, 1);
1053
1054 return retval;
1055 }
1056
1057 static int kbd_backlight_enable(struct samsung_laptop *samsung)
1058 {
1059 const struct sabi_commands *commands = &samsung->config->commands;
1060 struct sabi_data data;
1061 int retval;
1062
1063 if (commands->kbd_backlight == 0xFFFF)
1064 return -ENODEV;
1065
1066 memset(&data, 0, sizeof(data));
1067 data.d0 = 0xaabb;
1068 retval = sabi_command(samsung, commands->kbd_backlight,
1069 &data, &data);
1070
1071 if (retval)
1072 return retval;
1073
1074 if (data.d0 != 0xccdd)
1075 return -ENODEV;
1076 return 0;
1077 }
1078
1079 static int kbd_backlight_read(struct samsung_laptop *samsung)
1080 {
1081 const struct sabi_commands *commands = &samsung->config->commands;
1082 struct sabi_data data;
1083 int retval;
1084
1085 memset(&data, 0, sizeof(data));
1086 data.data[0] = 0x81;
1087 retval = sabi_command(samsung, commands->kbd_backlight,
1088 &data, &data);
1089
1090 if (retval)
1091 return retval;
1092
1093 return data.data[0];
1094 }
1095
1096 static int kbd_backlight_write(struct samsung_laptop *samsung, int brightness)
1097 {
1098 const struct sabi_commands *commands = &samsung->config->commands;
1099 struct sabi_data data;
1100
1101 memset(&data, 0, sizeof(data));
1102 data.d0 = 0x82 | ((brightness & 0xFF) << 8);
1103 return sabi_command(samsung, commands->kbd_backlight,
1104 &data, NULL);
1105 }
1106
1107 static void kbd_led_update(struct work_struct *work)
1108 {
1109 struct samsung_laptop *samsung;
1110
1111 samsung = container_of(work, struct samsung_laptop, kbd_led_work);
1112 kbd_backlight_write(samsung, samsung->kbd_led_wk);
1113 }
1114
1115 static void kbd_led_set(struct led_classdev *led_cdev,
1116 enum led_brightness value)
1117 {
1118 struct samsung_laptop *samsung;
1119
1120 samsung = container_of(led_cdev, struct samsung_laptop, kbd_led);
1121
1122 if (value > samsung->kbd_led.max_brightness)
1123 value = samsung->kbd_led.max_brightness;
1124 else if (value < 0)
1125 value = 0;
1126
1127 samsung->kbd_led_wk = value;
1128 queue_work(samsung->led_workqueue, &samsung->kbd_led_work);
1129 }
1130
1131 static enum led_brightness kbd_led_get(struct led_classdev *led_cdev)
1132 {
1133 struct samsung_laptop *samsung;
1134
1135 samsung = container_of(led_cdev, struct samsung_laptop, kbd_led);
1136 return kbd_backlight_read(samsung);
1137 }
1138
1139 static void samsung_leds_exit(struct samsung_laptop *samsung)
1140 {
1141 led_classdev_unregister(&samsung->kbd_led);
1142 if (samsung->led_workqueue)
1143 destroy_workqueue(samsung->led_workqueue);
1144 }
1145
1146 static int __init samsung_leds_init(struct samsung_laptop *samsung)
1147 {
1148 int ret = 0;
1149
1150 samsung->led_workqueue = create_singlethread_workqueue("led_workqueue");
1151 if (!samsung->led_workqueue)
1152 return -ENOMEM;
1153
1154 if (kbd_backlight_enable(samsung) >= 0) {
1155 INIT_WORK(&samsung->kbd_led_work, kbd_led_update);
1156
1157 samsung->kbd_led.name = "samsung::kbd_backlight";
1158 samsung->kbd_led.brightness_set = kbd_led_set;
1159 samsung->kbd_led.brightness_get = kbd_led_get;
1160 samsung->kbd_led.max_brightness = 8;
1161 if (samsung->quirks->four_kbd_backlight_levels)
1162 samsung->kbd_led.max_brightness = 4;
1163
1164 ret = led_classdev_register(&samsung->platform_device->dev,
1165 &samsung->kbd_led);
1166 }
1167
1168 if (ret)
1169 samsung_leds_exit(samsung);
1170
1171 return ret;
1172 }
1173
1174 static void samsung_backlight_exit(struct samsung_laptop *samsung)
1175 {
1176 if (samsung->backlight_device) {
1177 backlight_device_unregister(samsung->backlight_device);
1178 samsung->backlight_device = NULL;
1179 }
1180 }
1181
1182 static int __init samsung_backlight_init(struct samsung_laptop *samsung)
1183 {
1184 struct backlight_device *bd;
1185 struct backlight_properties props;
1186
1187 if (!samsung->handle_backlight)
1188 return 0;
1189
1190 memset(&props, 0, sizeof(struct backlight_properties));
1191 props.type = BACKLIGHT_PLATFORM;
1192 props.max_brightness = samsung->config->max_brightness -
1193 samsung->config->min_brightness;
1194
1195 bd = backlight_device_register("samsung",
1196 &samsung->platform_device->dev,
1197 samsung, &backlight_ops,
1198 &props);
1199 if (IS_ERR(bd))
1200 return PTR_ERR(bd);
1201
1202 samsung->backlight_device = bd;
1203 samsung->backlight_device->props.brightness = read_brightness(samsung);
1204 samsung->backlight_device->props.power = FB_BLANK_UNBLANK;
1205 backlight_update_status(samsung->backlight_device);
1206
1207 return 0;
1208 }
1209
1210 static umode_t samsung_sysfs_is_visible(struct kobject *kobj,
1211 struct attribute *attr, int idx)
1212 {
1213 struct device *dev = container_of(kobj, struct device, kobj);
1214 struct samsung_laptop *samsung = dev_get_drvdata(dev);
1215 bool ok = true;
1216
1217 if (attr == &dev_attr_performance_level.attr)
1218 ok = !!samsung->config->performance_levels[0].name;
1219 if (attr == &dev_attr_battery_life_extender.attr)
1220 ok = !!(read_battery_life_extender(samsung) >= 0);
1221 if (attr == &dev_attr_usb_charge.attr)
1222 ok = !!(read_usb_charge(samsung) >= 0);
1223 if (attr == &dev_attr_lid_handling.attr)
1224 ok = !!(read_lid_handling(samsung) >= 0);
1225
1226 return ok ? attr->mode : 0;
1227 }
1228
1229 static const struct attribute_group platform_attribute_group = {
1230 .is_visible = samsung_sysfs_is_visible,
1231 .attrs = platform_attributes
1232 };
1233
1234 static void samsung_sysfs_exit(struct samsung_laptop *samsung)
1235 {
1236 struct platform_device *device = samsung->platform_device;
1237
1238 sysfs_remove_group(&device->dev.kobj, &platform_attribute_group);
1239 }
1240
1241 static int __init samsung_sysfs_init(struct samsung_laptop *samsung)
1242 {
1243 struct platform_device *device = samsung->platform_device;
1244
1245 return sysfs_create_group(&device->dev.kobj, &platform_attribute_group);
1246
1247 }
1248
1249 static int samsung_laptop_call_show(struct seq_file *m, void *data)
1250 {
1251 struct samsung_laptop *samsung = m->private;
1252 struct sabi_data *sdata = &samsung->debug.data;
1253 int ret;
1254
1255 seq_printf(m, "SABI 0x%04x {0x%08x, 0x%08x, 0x%04x, 0x%02x}\n",
1256 samsung->debug.command,
1257 sdata->d0, sdata->d1, sdata->d2, sdata->d3);
1258
1259 ret = sabi_command(samsung, samsung->debug.command, sdata, sdata);
1260
1261 if (ret) {
1262 seq_printf(m, "SABI command 0x%04x failed\n",
1263 samsung->debug.command);
1264 return ret;
1265 }
1266
1267 seq_printf(m, "SABI {0x%08x, 0x%08x, 0x%04x, 0x%02x}\n",
1268 sdata->d0, sdata->d1, sdata->d2, sdata->d3);
1269 return 0;
1270 }
1271 DEFINE_SHOW_ATTRIBUTE(samsung_laptop_call);
1272
1273 static void samsung_debugfs_exit(struct samsung_laptop *samsung)
1274 {
1275 debugfs_remove_recursive(samsung->debug.root);
1276 }
1277
1278 static void samsung_debugfs_init(struct samsung_laptop *samsung)
1279 {
1280 struct dentry *root;
1281
1282 root = debugfs_create_dir("samsung-laptop", NULL);
1283 samsung->debug.root = root;
1284
1285 samsung->debug.f0000_wrapper.data = samsung->f0000_segment;
1286 samsung->debug.f0000_wrapper.size = 0xffff;
1287
1288 samsung->debug.data_wrapper.data = &samsung->debug.data;
1289 samsung->debug.data_wrapper.size = sizeof(samsung->debug.data);
1290
1291 samsung->debug.sdiag_wrapper.data = samsung->sdiag;
1292 samsung->debug.sdiag_wrapper.size = strlen(samsung->sdiag);
1293
1294 debugfs_create_u16("command", S_IRUGO | S_IWUSR, root,
1295 &samsung->debug.command);
1296 debugfs_create_u32("d0", S_IRUGO | S_IWUSR, root,
1297 &samsung->debug.data.d0);
1298 debugfs_create_u32("d1", S_IRUGO | S_IWUSR, root,
1299 &samsung->debug.data.d1);
1300 debugfs_create_u16("d2", S_IRUGO | S_IWUSR, root,
1301 &samsung->debug.data.d2);
1302 debugfs_create_u8("d3", S_IRUGO | S_IWUSR, root,
1303 &samsung->debug.data.d3);
1304 debugfs_create_blob("data", S_IRUGO | S_IWUSR, root,
1305 &samsung->debug.data_wrapper);
1306 debugfs_create_blob("f0000_segment", S_IRUSR | S_IWUSR, root,
1307 &samsung->debug.f0000_wrapper);
1308 debugfs_create_file("call", S_IFREG | S_IRUGO, root, samsung,
1309 &samsung_laptop_call_fops);
1310 debugfs_create_blob("sdiag", S_IRUGO | S_IWUSR, root,
1311 &samsung->debug.sdiag_wrapper);
1312 }
1313
1314 static void samsung_sabi_exit(struct samsung_laptop *samsung)
1315 {
1316 const struct sabi_config *config = samsung->config;
1317
1318 /* Turn off "Linux" mode in the BIOS */
1319 if (config && config->commands.set_linux != 0xff)
1320 sabi_set_commandb(samsung, config->commands.set_linux, 0x80);
1321
1322 if (samsung->sabi_iface) {
1323 iounmap(samsung->sabi_iface);
1324 samsung->sabi_iface = NULL;
1325 }
1326 if (samsung->f0000_segment) {
1327 iounmap(samsung->f0000_segment);
1328 samsung->f0000_segment = NULL;
1329 }
1330
1331 samsung->config = NULL;
1332 }
1333
1334 static __init void samsung_sabi_infos(struct samsung_laptop *samsung, int loca,
1335 unsigned int ifaceP)
1336 {
1337 const struct sabi_config *config = samsung->config;
1338
1339 printk(KERN_DEBUG "This computer supports SABI==%x\n",
1340 loca + 0xf0000 - 6);
1341
1342 printk(KERN_DEBUG "SABI header:\n");
1343 printk(KERN_DEBUG " SMI Port Number = 0x%04x\n",
1344 readw(samsung->sabi + config->header_offsets.port));
1345 printk(KERN_DEBUG " SMI Interface Function = 0x%02x\n",
1346 readb(samsung->sabi + config->header_offsets.iface_func));
1347 printk(KERN_DEBUG " SMI enable memory buffer = 0x%02x\n",
1348 readb(samsung->sabi + config->header_offsets.en_mem));
1349 printk(KERN_DEBUG " SMI restore memory buffer = 0x%02x\n",
1350 readb(samsung->sabi + config->header_offsets.re_mem));
1351 printk(KERN_DEBUG " SABI data offset = 0x%04x\n",
1352 readw(samsung->sabi + config->header_offsets.data_offset));
1353 printk(KERN_DEBUG " SABI data segment = 0x%04x\n",
1354 readw(samsung->sabi + config->header_offsets.data_segment));
1355
1356 printk(KERN_DEBUG " SABI pointer = 0x%08x\n", ifaceP);
1357 }
1358
1359 static void __init samsung_sabi_diag(struct samsung_laptop *samsung)
1360 {
1361 int loca = find_signature(samsung->f0000_segment, "SDiaG@");
1362 int i;
1363
1364 if (loca == 0xffff)
1365 return ;
1366
1367 /* Example:
1368 * Ident: @SDiaG@686XX-N90X3A/966-SEC-07HL-S90X3A
1369 *
1370 * Product name: 90X3A
1371 * BIOS Version: 07HL
1372 */
1373 loca += 1;
1374 for (i = 0; loca < 0xffff && i < sizeof(samsung->sdiag) - 1; loca++) {
1375 char temp = readb(samsung->f0000_segment + loca);
1376
1377 if (isalnum(temp) || temp == '/' || temp == '-')
1378 samsung->sdiag[i++] = temp;
1379 else
1380 break ;
1381 }
1382
1383 if (debug && samsung->sdiag[0])
1384 pr_info("sdiag: %s", samsung->sdiag);
1385 }
1386
1387 static int __init samsung_sabi_init(struct samsung_laptop *samsung)
1388 {
1389 const struct sabi_config *config = NULL;
1390 const struct sabi_commands *commands;
1391 unsigned int ifaceP;
1392 int loca = 0xffff;
1393 int ret = 0;
1394 int i;
1395
1396 samsung->f0000_segment = ioremap(0xf0000, 0xffff);
1397 if (!samsung->f0000_segment) {
1398 if (debug || force)
1399 pr_err("Can't map the segment at 0xf0000\n");
1400 ret = -EINVAL;
1401 goto exit;
1402 }
1403
1404 samsung_sabi_diag(samsung);
1405
1406 /* Try to find one of the signatures in memory to find the header */
1407 for (i = 0; sabi_configs[i].test_string != NULL; ++i) {
1408 samsung->config = &sabi_configs[i];
1409 loca = find_signature(samsung->f0000_segment,
1410 samsung->config->test_string);
1411 if (loca != 0xffff)
1412 break;
1413 }
1414
1415 if (loca == 0xffff) {
1416 if (debug || force)
1417 pr_err("This computer does not support SABI\n");
1418 ret = -ENODEV;
1419 goto exit;
1420 }
1421
1422 config = samsung->config;
1423 commands = &config->commands;
1424
1425 /* point to the SMI port Number */
1426 loca += 1;
1427 samsung->sabi = (samsung->f0000_segment + loca);
1428
1429 /* Get a pointer to the SABI Interface */
1430 ifaceP = (readw(samsung->sabi + config->header_offsets.data_segment) & 0x0ffff) << 4;
1431 ifaceP += readw(samsung->sabi + config->header_offsets.data_offset) & 0x0ffff;
1432
1433 if (debug)
1434 samsung_sabi_infos(samsung, loca, ifaceP);
1435
1436 samsung->sabi_iface = ioremap(ifaceP, 16);
1437 if (!samsung->sabi_iface) {
1438 pr_err("Can't remap %x\n", ifaceP);
1439 ret = -EINVAL;
1440 goto exit;
1441 }
1442
1443 /* Turn on "Linux" mode in the BIOS */
1444 if (commands->set_linux != 0xff) {
1445 int retval = sabi_set_commandb(samsung,
1446 commands->set_linux, 0x81);
1447 if (retval) {
1448 pr_warn("Linux mode was not set!\n");
1449 ret = -ENODEV;
1450 goto exit;
1451 }
1452 }
1453
1454 /* Check for stepping quirk */
1455 if (samsung->handle_backlight)
1456 check_for_stepping_quirk(samsung);
1457
1458 pr_info("detected SABI interface: %s\n",
1459 samsung->config->test_string);
1460
1461 exit:
1462 if (ret)
1463 samsung_sabi_exit(samsung);
1464
1465 return ret;
1466 }
1467
1468 static void samsung_platform_exit(struct samsung_laptop *samsung)
1469 {
1470 if (samsung->platform_device) {
1471 platform_device_unregister(samsung->platform_device);
1472 samsung->platform_device = NULL;
1473 }
1474 }
1475
1476 static int samsung_pm_notification(struct notifier_block *nb,
1477 unsigned long val, void *ptr)
1478 {
1479 struct samsung_laptop *samsung;
1480
1481 samsung = container_of(nb, struct samsung_laptop, pm_nb);
1482 if (val == PM_POST_HIBERNATION &&
1483 samsung->quirks->enable_kbd_backlight)
1484 kbd_backlight_enable(samsung);
1485
1486 if (val == PM_POST_HIBERNATION && samsung->quirks->lid_handling)
1487 write_lid_handling(samsung, 1);
1488
1489 return 0;
1490 }
1491
1492 static int __init samsung_platform_init(struct samsung_laptop *samsung)
1493 {
1494 struct platform_device *pdev;
1495
1496 pdev = platform_device_register_simple("samsung", -1, NULL, 0);
1497 if (IS_ERR(pdev))
1498 return PTR_ERR(pdev);
1499
1500 samsung->platform_device = pdev;
1501 platform_set_drvdata(samsung->platform_device, samsung);
1502 return 0;
1503 }
1504
1505 static struct samsung_quirks *quirks;
1506
1507 static int __init samsung_dmi_matched(const struct dmi_system_id *d)
1508 {
1509 quirks = d->driver_data;
1510 return 0;
1511 }
1512
1513 static const struct dmi_system_id samsung_dmi_table[] __initconst = {
1514 {
1515 .matches = {
1516 DMI_MATCH(DMI_SYS_VENDOR,
1517 "SAMSUNG ELECTRONICS CO., LTD."),
1518 DMI_MATCH(DMI_CHASSIS_TYPE, "8"), /* Portable */
1519 },
1520 },
1521 {
1522 .matches = {
1523 DMI_MATCH(DMI_SYS_VENDOR,
1524 "SAMSUNG ELECTRONICS CO., LTD."),
1525 DMI_MATCH(DMI_CHASSIS_TYPE, "9"), /* Laptop */
1526 },
1527 },
1528 {
1529 .matches = {
1530 DMI_MATCH(DMI_SYS_VENDOR,
1531 "SAMSUNG ELECTRONICS CO., LTD."),
1532 DMI_MATCH(DMI_CHASSIS_TYPE, "10"), /* Notebook */
1533 },
1534 },
1535 {
1536 .matches = {
1537 DMI_MATCH(DMI_SYS_VENDOR,
1538 "SAMSUNG ELECTRONICS CO., LTD."),
1539 DMI_MATCH(DMI_CHASSIS_TYPE, "14"), /* Sub-Notebook */
1540 },
1541 },
1542 /* DMI ids for laptops with bad Chassis Type */
1543 {
1544 .ident = "R40/R41",
1545 .matches = {
1546 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
1547 DMI_MATCH(DMI_PRODUCT_NAME, "R40/R41"),
1548 DMI_MATCH(DMI_BOARD_NAME, "R40/R41"),
1549 },
1550 },
1551 /* Specific DMI ids for laptop with quirks */
1552 {
1553 .callback = samsung_dmi_matched,
1554 .ident = "N150P",
1555 .matches = {
1556 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
1557 DMI_MATCH(DMI_PRODUCT_NAME, "N150P"),
1558 DMI_MATCH(DMI_BOARD_NAME, "N150P"),
1559 },
1560 .driver_data = &samsung_use_native_backlight,
1561 },
1562 {
1563 .callback = samsung_dmi_matched,
1564 .ident = "N145P/N250P/N260P",
1565 .matches = {
1566 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
1567 DMI_MATCH(DMI_PRODUCT_NAME, "N145P/N250P/N260P"),
1568 DMI_MATCH(DMI_BOARD_NAME, "N145P/N250P/N260P"),
1569 },
1570 .driver_data = &samsung_use_native_backlight,
1571 },
1572 {
1573 .callback = samsung_dmi_matched,
1574 .ident = "N150/N210/N220",
1575 .matches = {
1576 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
1577 DMI_MATCH(DMI_PRODUCT_NAME, "N150/N210/N220"),
1578 DMI_MATCH(DMI_BOARD_NAME, "N150/N210/N220"),
1579 },
1580 .driver_data = &samsung_broken_acpi_video,
1581 },
1582 {
1583 .callback = samsung_dmi_matched,
1584 .ident = "NF110/NF210/NF310",
1585 .matches = {
1586 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
1587 DMI_MATCH(DMI_PRODUCT_NAME, "NF110/NF210/NF310"),
1588 DMI_MATCH(DMI_BOARD_NAME, "NF110/NF210/NF310"),
1589 },
1590 .driver_data = &samsung_broken_acpi_video,
1591 },
1592 {
1593 .callback = samsung_dmi_matched,
1594 .ident = "X360",
1595 .matches = {
1596 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
1597 DMI_MATCH(DMI_PRODUCT_NAME, "X360"),
1598 DMI_MATCH(DMI_BOARD_NAME, "X360"),
1599 },
1600 .driver_data = &samsung_broken_acpi_video,
1601 },
1602 {
1603 .callback = samsung_dmi_matched,
1604 .ident = "N250P",
1605 .matches = {
1606 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
1607 DMI_MATCH(DMI_PRODUCT_NAME, "N250P"),
1608 DMI_MATCH(DMI_BOARD_NAME, "N250P"),
1609 },
1610 .driver_data = &samsung_use_native_backlight,
1611 },
1612 {
1613 .callback = samsung_dmi_matched,
1614 .ident = "NC210",
1615 .matches = {
1616 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
1617 DMI_MATCH(DMI_PRODUCT_NAME, "NC210/NC110"),
1618 DMI_MATCH(DMI_BOARD_NAME, "NC210/NC110"),
1619 },
1620 .driver_data = &samsung_broken_acpi_video,
1621 },
1622 {
1623 .callback = samsung_dmi_matched,
1624 .ident = "730U3E/740U3E",
1625 .matches = {
1626 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
1627 DMI_MATCH(DMI_PRODUCT_NAME, "730U3E/740U3E"),
1628 },
1629 .driver_data = &samsung_np740u3e,
1630 },
1631 {
1632 .callback = samsung_dmi_matched,
1633 .ident = "300V3Z/300V4Z/300V5Z",
1634 .matches = {
1635 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
1636 DMI_MATCH(DMI_PRODUCT_NAME, "300V3Z/300V4Z/300V5Z"),
1637 },
1638 .driver_data = &samsung_lid_handling,
1639 },
1640 { },
1641 };
1642 MODULE_DEVICE_TABLE(dmi, samsung_dmi_table);
1643
1644 static struct platform_device *samsung_platform_device;
1645
1646 static int __init samsung_init(void)
1647 {
1648 struct samsung_laptop *samsung;
1649 int ret;
1650
1651 if (efi_enabled(EFI_BOOT))
1652 return -ENODEV;
1653
1654 quirks = &samsung_unknown;
1655 if (!force && !dmi_check_system(samsung_dmi_table))
1656 return -ENODEV;
1657
1658 samsung = kzalloc(sizeof(*samsung), GFP_KERNEL);
1659 if (!samsung)
1660 return -ENOMEM;
1661
1662 mutex_init(&samsung->sabi_mutex);
1663 samsung->handle_backlight = true;
1664 samsung->quirks = quirks;
1665
1666 #ifdef CONFIG_ACPI
1667 if (samsung->quirks->broken_acpi_video)
1668 acpi_video_set_dmi_backlight_type(acpi_backlight_vendor);
1669 if (samsung->quirks->use_native_backlight)
1670 acpi_video_set_dmi_backlight_type(acpi_backlight_native);
1671
1672 if (acpi_video_get_backlight_type() != acpi_backlight_vendor)
1673 samsung->handle_backlight = false;
1674 #endif
1675
1676 ret = samsung_platform_init(samsung);
1677 if (ret)
1678 goto error_platform;
1679
1680 ret = samsung_sabi_init(samsung);
1681 if (ret)
1682 goto error_sabi;
1683
1684 ret = samsung_sysfs_init(samsung);
1685 if (ret)
1686 goto error_sysfs;
1687
1688 ret = samsung_backlight_init(samsung);
1689 if (ret)
1690 goto error_backlight;
1691
1692 ret = samsung_rfkill_init(samsung);
1693 if (ret)
1694 goto error_rfkill;
1695
1696 ret = samsung_leds_init(samsung);
1697 if (ret)
1698 goto error_leds;
1699
1700 ret = samsung_lid_handling_init(samsung);
1701 if (ret)
1702 goto error_lid_handling;
1703
1704 samsung_debugfs_init(samsung);
1705
1706 samsung->pm_nb.notifier_call = samsung_pm_notification;
1707 register_pm_notifier(&samsung->pm_nb);
1708
1709 samsung_platform_device = samsung->platform_device;
1710 return ret;
1711
1712 error_lid_handling:
1713 samsung_leds_exit(samsung);
1714 error_leds:
1715 samsung_rfkill_exit(samsung);
1716 error_rfkill:
1717 samsung_backlight_exit(samsung);
1718 error_backlight:
1719 samsung_sysfs_exit(samsung);
1720 error_sysfs:
1721 samsung_sabi_exit(samsung);
1722 error_sabi:
1723 samsung_platform_exit(samsung);
1724 error_platform:
1725 kfree(samsung);
1726 return ret;
1727 }
1728
1729 static void __exit samsung_exit(void)
1730 {
1731 struct samsung_laptop *samsung;
1732
1733 samsung = platform_get_drvdata(samsung_platform_device);
1734 unregister_pm_notifier(&samsung->pm_nb);
1735
1736 samsung_debugfs_exit(samsung);
1737 samsung_lid_handling_exit(samsung);
1738 samsung_leds_exit(samsung);
1739 samsung_rfkill_exit(samsung);
1740 samsung_backlight_exit(samsung);
1741 samsung_sysfs_exit(samsung);
1742 samsung_sabi_exit(samsung);
1743 samsung_platform_exit(samsung);
1744
1745 kfree(samsung);
1746 samsung_platform_device = NULL;
1747 }
1748
1749 module_init(samsung_init);
1750 module_exit(samsung_exit);
1751
1752 MODULE_AUTHOR("Greg Kroah-Hartman <gregkh@suse.de>");
1753 MODULE_DESCRIPTION("Samsung Backlight driver");
1754 MODULE_LICENSE("GPL");
Linux with added FPC-III support