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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 */
56struct 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
68struct 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
77struct 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
141struct sabi_performance_level {
142 const char *name;
143 u16 value;
144};
145
146struct 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
157static 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
313struct 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
323struct samsung_laptop;
324
325struct samsung_rfkill {
326 struct samsung_laptop *samsung;
327 struct rfkill *rfkill;
328 enum rfkill_type type;
329};
330
331struct 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
362struct 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
370static struct samsung_quirks samsung_unknown = {};
371
372static struct samsung_quirks samsung_broken_acpi_video = {
373 .broken_acpi_video = true,
374};
375
376static struct samsung_quirks samsung_use_native_backlight = {
377 .use_native_backlight = true,
378};
379
380static struct samsung_quirks samsung_np740u3e = {
381 .four_kbd_backlight_levels = true,
382 .enable_kbd_backlight = true,
383};
384
385static struct samsung_quirks samsung_lid_handling = {
386 .lid_handling = true,
387};
388
389static bool force;
390module_param(force, bool, 0);
391MODULE_PARM_DESC(force,
392 "Disable the DMI check and forces the driver to be loaded");
393
394static bool debug;
395module_param(debug, bool, S_IRUGO | S_IWUSR);
396MODULE_PARM_DESC(debug, "Debug enabled or not");
397
398static 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
466exit:
467 mutex_unlock(&samsung->sabi_mutex);
468 return ret;
469}
470
471/* simple wrappers usable with most commands */
472static 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
481static 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
503static 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
523static 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
530static 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
564static 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
579static const struct backlight_ops backlight_ops = {
580 .get_brightness = get_brightness,
581 .update_status = update_status,
582};
583
584static 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
594static struct rfkill_ops seclinux_rfkill_ops = {
595 .set_block = seclinux_rfkill_set,
596};
597
598static 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
607static 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
633static 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
654static struct rfkill_ops swsmi_rfkill_ops = {
655 .set_block = swsmi_rfkill_set,
656 .query = swsmi_rfkill_query,
657};
658
659static 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
683static 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
712static DEVICE_ATTR(performance_level, S_IWUSR | S_IRUGO,
713 get_performance_level, set_performance_level);
714
715static 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
738static 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
750static 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
764static 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
781static DEVICE_ATTR(battery_life_extender, S_IWUSR | S_IRUGO,
782 get_battery_life_extender, set_battery_life_extender);
783
784static 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
807static 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
819static 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
833static 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
850static DEVICE_ATTR(usb_charge, S_IWUSR | S_IRUGO,
851 get_usb_charge, set_usb_charge);
852
853static 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
872static 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
884static 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
898static 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
915static DEVICE_ATTR(lid_handling, S_IWUSR | S_IRUGO,
916 get_lid_handling, set_lid_handling);
917
918static 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
926static 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
945static 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
959static 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
989static 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
995static 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
1029exit:
1030 if (ret)
1031 samsung_rfkill_exit(samsung);
1032
1033 return ret;
1034}
1035
1036static 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
1045static void samsung_lid_handling_exit(struct samsung_laptop *samsung)
1046{
1047 if (samsung->quirks->lid_handling)
1048 write_lid_handling(samsung, 0);
1049}
1050
1051static 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
1061static 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
1083static 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
1100static 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
1111static 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
1119static 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
1135static 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
1143static 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
1151static 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
1179static 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
1187static 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
1215static 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
1235static struct attribute_group platform_attribute_group = {
1236 .is_visible = samsung_sysfs_is_visible,
1237 .attrs = platform_attributes
1238};
1239
1240static 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
1247static 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
1255static 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
1278static int samsung_debugfs_open(struct inode *inode, struct file *file)
1279{
1280 return single_open(file, show_call, inode->i_private);
1281}
1282
1283static 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
1291static void samsung_debugfs_exit(struct samsung_laptop *samsung)
1292{
1293 debugfs_remove_recursive(samsung->debug.root);
1294}
1295
1296static 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
1366error_debugfs:
1367 samsung_debugfs_exit(samsung);
1368 return -ENOMEM;
1369}
1370
1371static 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
1391static __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
1416static 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
1444static 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
1518exit:
1519 if (ret)
1520 samsung_sabi_exit(samsung);
1521
1522 return ret;
1523}
1524
1525static 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
1533static 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
1549static 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
1562static struct samsung_quirks *quirks;
1563
1564static int __init samsung_dmi_matched(const struct dmi_system_id *d)
1565{
1566 quirks = d->driver_data;
1567 return 0;
1568}
1569
1570static 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};
1699MODULE_DEVICE_TABLE(dmi, samsung_dmi_table);
1700
1701static struct platform_device *samsung_platform_device;
1702
1703static 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
1771error_debugfs:
1772 samsung_lid_handling_exit(samsung);
1773error_lid_handling:
1774 samsung_leds_exit(samsung);
1775error_leds:
1776 samsung_rfkill_exit(samsung);
1777error_rfkill:
1778 samsung_backlight_exit(samsung);
1779error_backlight:
1780 samsung_sysfs_exit(samsung);
1781error_sysfs:
1782 samsung_sabi_exit(samsung);
1783error_sabi:
1784 samsung_platform_exit(samsung);
1785error_platform:
1786 kfree(samsung);
1787 return ret;
1788}
1789
1790static 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
1810module_init(samsung_init);
1811module_exit(samsung_exit);
1812
1813MODULE_AUTHOR("Greg Kroah-Hartman <gregkh@suse.de>");
1814MODULE_DESCRIPTION("Samsung Backlight driver");
1815MODULE_LICENSE("GPL");
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/fb.h>
21#include <linux/dmi.h>
22#include <linux/platform_device.h>
23#include <linux/rfkill.h>
24
25/*
26 * This driver is needed because a number of Samsung laptops do not hook
27 * their control settings through ACPI. So we have to poke around in the
28 * BIOS to do things like brightness values, and "special" key controls.
29 */
30
31/*
32 * We have 0 - 8 as valid brightness levels. The specs say that level 0 should
33 * be reserved by the BIOS (which really doesn't make much sense), we tell
34 * userspace that the value is 0 - 7 and then just tell the hardware 1 - 8
35 */
36#define MAX_BRIGHT 0x07
37
38
39#define SABI_IFACE_MAIN 0x00
40#define SABI_IFACE_SUB 0x02
41#define SABI_IFACE_COMPLETE 0x04
42#define SABI_IFACE_DATA 0x05
43
44/* Structure to get data back to the calling function */
45struct sabi_retval {
46 u8 retval[20];
47};
48
49struct sabi_header_offsets {
50 u8 port;
51 u8 re_mem;
52 u8 iface_func;
53 u8 en_mem;
54 u8 data_offset;
55 u8 data_segment;
56};
57
58struct sabi_commands {
59 /*
60 * Brightness is 0 - 8, as described above.
61 * Value 0 is for the BIOS to use
62 */
63 u8 get_brightness;
64 u8 set_brightness;
65
66 /*
67 * first byte:
68 * 0x00 - wireless is off
69 * 0x01 - wireless is on
70 * second byte:
71 * 0x02 - 3G is off
72 * 0x03 - 3G is on
73 * TODO, verify 3G is correct, that doesn't seem right...
74 */
75 u8 get_wireless_button;
76 u8 set_wireless_button;
77
78 /* 0 is off, 1 is on */
79 u8 get_backlight;
80 u8 set_backlight;
81
82 /*
83 * 0x80 or 0x00 - no action
84 * 0x81 - recovery key pressed
85 */
86 u8 get_recovery_mode;
87 u8 set_recovery_mode;
88
89 /*
90 * on seclinux: 0 is low, 1 is high,
91 * on swsmi: 0 is normal, 1 is silent, 2 is turbo
92 */
93 u8 get_performance_level;
94 u8 set_performance_level;
95
96 /*
97 * Tell the BIOS that Linux is running on this machine.
98 * 81 is on, 80 is off
99 */
100 u8 set_linux;
101};
102
103struct sabi_performance_level {
104 const char *name;
105 u8 value;
106};
107
108struct sabi_config {
109 const char *test_string;
110 u16 main_function;
111 const struct sabi_header_offsets header_offsets;
112 const struct sabi_commands commands;
113 const struct sabi_performance_level performance_levels[4];
114 u8 min_brightness;
115 u8 max_brightness;
116};
117
118static const struct sabi_config sabi_configs[] = {
119 {
120 .test_string = "SECLINUX",
121
122 .main_function = 0x4c49,
123
124 .header_offsets = {
125 .port = 0x00,
126 .re_mem = 0x02,
127 .iface_func = 0x03,
128 .en_mem = 0x04,
129 .data_offset = 0x05,
130 .data_segment = 0x07,
131 },
132
133 .commands = {
134 .get_brightness = 0x00,
135 .set_brightness = 0x01,
136
137 .get_wireless_button = 0x02,
138 .set_wireless_button = 0x03,
139
140 .get_backlight = 0x04,
141 .set_backlight = 0x05,
142
143 .get_recovery_mode = 0x06,
144 .set_recovery_mode = 0x07,
145
146 .get_performance_level = 0x08,
147 .set_performance_level = 0x09,
148
149 .set_linux = 0x0a,
150 },
151
152 .performance_levels = {
153 {
154 .name = "silent",
155 .value = 0,
156 },
157 {
158 .name = "normal",
159 .value = 1,
160 },
161 { },
162 },
163 .min_brightness = 1,
164 .max_brightness = 8,
165 },
166 {
167 .test_string = "SwSmi@",
168
169 .main_function = 0x5843,
170
171 .header_offsets = {
172 .port = 0x00,
173 .re_mem = 0x04,
174 .iface_func = 0x02,
175 .en_mem = 0x03,
176 .data_offset = 0x05,
177 .data_segment = 0x07,
178 },
179
180 .commands = {
181 .get_brightness = 0x10,
182 .set_brightness = 0x11,
183
184 .get_wireless_button = 0x12,
185 .set_wireless_button = 0x13,
186
187 .get_backlight = 0x2d,
188 .set_backlight = 0x2e,
189
190 .get_recovery_mode = 0xff,
191 .set_recovery_mode = 0xff,
192
193 .get_performance_level = 0x31,
194 .set_performance_level = 0x32,
195
196 .set_linux = 0xff,
197 },
198
199 .performance_levels = {
200 {
201 .name = "normal",
202 .value = 0,
203 },
204 {
205 .name = "silent",
206 .value = 1,
207 },
208 {
209 .name = "overclock",
210 .value = 2,
211 },
212 { },
213 },
214 .min_brightness = 0,
215 .max_brightness = 8,
216 },
217 { },
218};
219
220static const struct sabi_config *sabi_config;
221
222static void __iomem *sabi;
223static void __iomem *sabi_iface;
224static void __iomem *f0000_segment;
225static struct backlight_device *backlight_device;
226static struct mutex sabi_mutex;
227static struct platform_device *sdev;
228static struct rfkill *rfk;
229
230static int force;
231module_param(force, bool, 0);
232MODULE_PARM_DESC(force,
233 "Disable the DMI check and forces the driver to be loaded");
234
235static int debug;
236module_param(debug, bool, S_IRUGO | S_IWUSR);
237MODULE_PARM_DESC(debug, "Debug enabled or not");
238
239static int sabi_get_command(u8 command, struct sabi_retval *sretval)
240{
241 int retval = 0;
242 u16 port = readw(sabi + sabi_config->header_offsets.port);
243 u8 complete, iface_data;
244
245 mutex_lock(&sabi_mutex);
246
247 /* enable memory to be able to write to it */
248 outb(readb(sabi + sabi_config->header_offsets.en_mem), port);
249
250 /* write out the command */
251 writew(sabi_config->main_function, sabi_iface + SABI_IFACE_MAIN);
252 writew(command, sabi_iface + SABI_IFACE_SUB);
253 writeb(0, sabi_iface + SABI_IFACE_COMPLETE);
254 outb(readb(sabi + sabi_config->header_offsets.iface_func), port);
255
256 /* write protect memory to make it safe */
257 outb(readb(sabi + sabi_config->header_offsets.re_mem), port);
258
259 /* see if the command actually succeeded */
260 complete = readb(sabi_iface + SABI_IFACE_COMPLETE);
261 iface_data = readb(sabi_iface + SABI_IFACE_DATA);
262 if (complete != 0xaa || iface_data == 0xff) {
263 pr_warn("SABI get command 0x%02x failed with completion flag 0x%02x and data 0x%02x\n",
264 command, complete, iface_data);
265 retval = -EINVAL;
266 goto exit;
267 }
268 /*
269 * Save off the data into a structure so the caller use it.
270 * Right now we only want the first 4 bytes,
271 * There are commands that need more, but not for the ones we
272 * currently care about.
273 */
274 sretval->retval[0] = readb(sabi_iface + SABI_IFACE_DATA);
275 sretval->retval[1] = readb(sabi_iface + SABI_IFACE_DATA + 1);
276 sretval->retval[2] = readb(sabi_iface + SABI_IFACE_DATA + 2);
277 sretval->retval[3] = readb(sabi_iface + SABI_IFACE_DATA + 3);
278
279exit:
280 mutex_unlock(&sabi_mutex);
281 return retval;
282
283}
284
285static int sabi_set_command(u8 command, u8 data)
286{
287 int retval = 0;
288 u16 port = readw(sabi + sabi_config->header_offsets.port);
289 u8 complete, iface_data;
290
291 mutex_lock(&sabi_mutex);
292
293 /* enable memory to be able to write to it */
294 outb(readb(sabi + sabi_config->header_offsets.en_mem), port);
295
296 /* write out the command */
297 writew(sabi_config->main_function, sabi_iface + SABI_IFACE_MAIN);
298 writew(command, sabi_iface + SABI_IFACE_SUB);
299 writeb(0, sabi_iface + SABI_IFACE_COMPLETE);
300 writeb(data, sabi_iface + SABI_IFACE_DATA);
301 outb(readb(sabi + sabi_config->header_offsets.iface_func), port);
302
303 /* write protect memory to make it safe */
304 outb(readb(sabi + sabi_config->header_offsets.re_mem), port);
305
306 /* see if the command actually succeeded */
307 complete = readb(sabi_iface + SABI_IFACE_COMPLETE);
308 iface_data = readb(sabi_iface + SABI_IFACE_DATA);
309 if (complete != 0xaa || iface_data == 0xff) {
310 pr_warn("SABI set command 0x%02x failed with completion flag 0x%02x and data 0x%02x\n",
311 command, complete, iface_data);
312 retval = -EINVAL;
313 }
314
315 mutex_unlock(&sabi_mutex);
316 return retval;
317}
318
319static void test_backlight(void)
320{
321 struct sabi_retval sretval;
322
323 sabi_get_command(sabi_config->commands.get_backlight, &sretval);
324 printk(KERN_DEBUG "backlight = 0x%02x\n", sretval.retval[0]);
325
326 sabi_set_command(sabi_config->commands.set_backlight, 0);
327 printk(KERN_DEBUG "backlight should be off\n");
328
329 sabi_get_command(sabi_config->commands.get_backlight, &sretval);
330 printk(KERN_DEBUG "backlight = 0x%02x\n", sretval.retval[0]);
331
332 msleep(1000);
333
334 sabi_set_command(sabi_config->commands.set_backlight, 1);
335 printk(KERN_DEBUG "backlight should be on\n");
336
337 sabi_get_command(sabi_config->commands.get_backlight, &sretval);
338 printk(KERN_DEBUG "backlight = 0x%02x\n", sretval.retval[0]);
339}
340
341static void test_wireless(void)
342{
343 struct sabi_retval sretval;
344
345 sabi_get_command(sabi_config->commands.get_wireless_button, &sretval);
346 printk(KERN_DEBUG "wireless led = 0x%02x\n", sretval.retval[0]);
347
348 sabi_set_command(sabi_config->commands.set_wireless_button, 0);
349 printk(KERN_DEBUG "wireless led should be off\n");
350
351 sabi_get_command(sabi_config->commands.get_wireless_button, &sretval);
352 printk(KERN_DEBUG "wireless led = 0x%02x\n", sretval.retval[0]);
353
354 msleep(1000);
355
356 sabi_set_command(sabi_config->commands.set_wireless_button, 1);
357 printk(KERN_DEBUG "wireless led should be on\n");
358
359 sabi_get_command(sabi_config->commands.get_wireless_button, &sretval);
360 printk(KERN_DEBUG "wireless led = 0x%02x\n", sretval.retval[0]);
361}
362
363static u8 read_brightness(void)
364{
365 struct sabi_retval sretval;
366 int user_brightness = 0;
367 int retval;
368
369 retval = sabi_get_command(sabi_config->commands.get_brightness,
370 &sretval);
371 if (!retval) {
372 user_brightness = sretval.retval[0];
373 if (user_brightness != 0)
374 user_brightness -= sabi_config->min_brightness;
375 }
376 return user_brightness;
377}
378
379static void set_brightness(u8 user_brightness)
380{
381 u8 user_level = user_brightness - sabi_config->min_brightness;
382
383 sabi_set_command(sabi_config->commands.set_brightness, user_level);
384}
385
386static int get_brightness(struct backlight_device *bd)
387{
388 return (int)read_brightness();
389}
390
391static int update_status(struct backlight_device *bd)
392{
393 set_brightness(bd->props.brightness);
394
395 if (bd->props.power == FB_BLANK_UNBLANK)
396 sabi_set_command(sabi_config->commands.set_backlight, 1);
397 else
398 sabi_set_command(sabi_config->commands.set_backlight, 0);
399 return 0;
400}
401
402static const struct backlight_ops backlight_ops = {
403 .get_brightness = get_brightness,
404 .update_status = update_status,
405};
406
407static int rfkill_set(void *data, bool blocked)
408{
409 /* Do something with blocked...*/
410 /*
411 * blocked == false is on
412 * blocked == true is off
413 */
414 if (blocked)
415 sabi_set_command(sabi_config->commands.set_wireless_button, 0);
416 else
417 sabi_set_command(sabi_config->commands.set_wireless_button, 1);
418
419 return 0;
420}
421
422static struct rfkill_ops rfkill_ops = {
423 .set_block = rfkill_set,
424};
425
426static int init_wireless(struct platform_device *sdev)
427{
428 int retval;
429
430 rfk = rfkill_alloc("samsung-wifi", &sdev->dev, RFKILL_TYPE_WLAN,
431 &rfkill_ops, NULL);
432 if (!rfk)
433 return -ENOMEM;
434
435 retval = rfkill_register(rfk);
436 if (retval) {
437 rfkill_destroy(rfk);
438 return -ENODEV;
439 }
440
441 return 0;
442}
443
444static void destroy_wireless(void)
445{
446 rfkill_unregister(rfk);
447 rfkill_destroy(rfk);
448}
449
450static ssize_t get_performance_level(struct device *dev,
451 struct device_attribute *attr, char *buf)
452{
453 struct sabi_retval sretval;
454 int retval;
455 int i;
456
457 /* Read the state */
458 retval = sabi_get_command(sabi_config->commands.get_performance_level,
459 &sretval);
460 if (retval)
461 return retval;
462
463 /* The logic is backwards, yeah, lots of fun... */
464 for (i = 0; sabi_config->performance_levels[i].name; ++i) {
465 if (sretval.retval[0] == sabi_config->performance_levels[i].value)
466 return sprintf(buf, "%s\n", sabi_config->performance_levels[i].name);
467 }
468 return sprintf(buf, "%s\n", "unknown");
469}
470
471static ssize_t set_performance_level(struct device *dev,
472 struct device_attribute *attr, const char *buf,
473 size_t count)
474{
475 if (count >= 1) {
476 int i;
477 for (i = 0; sabi_config->performance_levels[i].name; ++i) {
478 const struct sabi_performance_level *level =
479 &sabi_config->performance_levels[i];
480 if (!strncasecmp(level->name, buf, strlen(level->name))) {
481 sabi_set_command(sabi_config->commands.set_performance_level,
482 level->value);
483 break;
484 }
485 }
486 if (!sabi_config->performance_levels[i].name)
487 return -EINVAL;
488 }
489 return count;
490}
491static DEVICE_ATTR(performance_level, S_IWUSR | S_IRUGO,
492 get_performance_level, set_performance_level);
493
494
495static int __init dmi_check_cb(const struct dmi_system_id *id)
496{
497 pr_info("found laptop model '%s'\n",
498 id->ident);
499 return 1;
500}
501
502static struct dmi_system_id __initdata samsung_dmi_table[] = {
503 {
504 .ident = "N128",
505 .matches = {
506 DMI_MATCH(DMI_SYS_VENDOR,
507 "SAMSUNG ELECTRONICS CO., LTD."),
508 DMI_MATCH(DMI_PRODUCT_NAME, "N128"),
509 DMI_MATCH(DMI_BOARD_NAME, "N128"),
510 },
511 .callback = dmi_check_cb,
512 },
513 {
514 .ident = "N130",
515 .matches = {
516 DMI_MATCH(DMI_SYS_VENDOR,
517 "SAMSUNG ELECTRONICS CO., LTD."),
518 DMI_MATCH(DMI_PRODUCT_NAME, "N130"),
519 DMI_MATCH(DMI_BOARD_NAME, "N130"),
520 },
521 .callback = dmi_check_cb,
522 },
523 {
524 .ident = "N510",
525 .matches = {
526 DMI_MATCH(DMI_SYS_VENDOR,
527 "SAMSUNG ELECTRONICS CO., LTD."),
528 DMI_MATCH(DMI_PRODUCT_NAME, "N510"),
529 DMI_MATCH(DMI_BOARD_NAME, "N510"),
530 },
531 .callback = dmi_check_cb,
532 },
533 {
534 .ident = "X125",
535 .matches = {
536 DMI_MATCH(DMI_SYS_VENDOR,
537 "SAMSUNG ELECTRONICS CO., LTD."),
538 DMI_MATCH(DMI_PRODUCT_NAME, "X125"),
539 DMI_MATCH(DMI_BOARD_NAME, "X125"),
540 },
541 .callback = dmi_check_cb,
542 },
543 {
544 .ident = "X120/X170",
545 .matches = {
546 DMI_MATCH(DMI_SYS_VENDOR,
547 "SAMSUNG ELECTRONICS CO., LTD."),
548 DMI_MATCH(DMI_PRODUCT_NAME, "X120/X170"),
549 DMI_MATCH(DMI_BOARD_NAME, "X120/X170"),
550 },
551 .callback = dmi_check_cb,
552 },
553 {
554 .ident = "NC10",
555 .matches = {
556 DMI_MATCH(DMI_SYS_VENDOR,
557 "SAMSUNG ELECTRONICS CO., LTD."),
558 DMI_MATCH(DMI_PRODUCT_NAME, "NC10"),
559 DMI_MATCH(DMI_BOARD_NAME, "NC10"),
560 },
561 .callback = dmi_check_cb,
562 },
563 {
564 .ident = "NP-Q45",
565 .matches = {
566 DMI_MATCH(DMI_SYS_VENDOR,
567 "SAMSUNG ELECTRONICS CO., LTD."),
568 DMI_MATCH(DMI_PRODUCT_NAME, "SQ45S70S"),
569 DMI_MATCH(DMI_BOARD_NAME, "SQ45S70S"),
570 },
571 .callback = dmi_check_cb,
572 },
573 {
574 .ident = "X360",
575 .matches = {
576 DMI_MATCH(DMI_SYS_VENDOR,
577 "SAMSUNG ELECTRONICS CO., LTD."),
578 DMI_MATCH(DMI_PRODUCT_NAME, "X360"),
579 DMI_MATCH(DMI_BOARD_NAME, "X360"),
580 },
581 .callback = dmi_check_cb,
582 },
583 {
584 .ident = "R410 Plus",
585 .matches = {
586 DMI_MATCH(DMI_SYS_VENDOR,
587 "SAMSUNG ELECTRONICS CO., LTD."),
588 DMI_MATCH(DMI_PRODUCT_NAME, "R410P"),
589 DMI_MATCH(DMI_BOARD_NAME, "R460"),
590 },
591 .callback = dmi_check_cb,
592 },
593 {
594 .ident = "R518",
595 .matches = {
596 DMI_MATCH(DMI_SYS_VENDOR,
597 "SAMSUNG ELECTRONICS CO., LTD."),
598 DMI_MATCH(DMI_PRODUCT_NAME, "R518"),
599 DMI_MATCH(DMI_BOARD_NAME, "R518"),
600 },
601 .callback = dmi_check_cb,
602 },
603 {
604 .ident = "R519/R719",
605 .matches = {
606 DMI_MATCH(DMI_SYS_VENDOR,
607 "SAMSUNG ELECTRONICS CO., LTD."),
608 DMI_MATCH(DMI_PRODUCT_NAME, "R519/R719"),
609 DMI_MATCH(DMI_BOARD_NAME, "R519/R719"),
610 },
611 .callback = dmi_check_cb,
612 },
613 {
614 .ident = "N150/N210/N220",
615 .matches = {
616 DMI_MATCH(DMI_SYS_VENDOR,
617 "SAMSUNG ELECTRONICS CO., LTD."),
618 DMI_MATCH(DMI_PRODUCT_NAME, "N150/N210/N220"),
619 DMI_MATCH(DMI_BOARD_NAME, "N150/N210/N220"),
620 },
621 .callback = dmi_check_cb,
622 },
623 {
624 .ident = "N150/N210/N220/N230",
625 .matches = {
626 DMI_MATCH(DMI_SYS_VENDOR,
627 "SAMSUNG ELECTRONICS CO., LTD."),
628 DMI_MATCH(DMI_PRODUCT_NAME, "N150/N210/N220/N230"),
629 DMI_MATCH(DMI_BOARD_NAME, "N150/N210/N220/N230"),
630 },
631 .callback = dmi_check_cb,
632 },
633 {
634 .ident = "N150P/N210P/N220P",
635 .matches = {
636 DMI_MATCH(DMI_SYS_VENDOR,
637 "SAMSUNG ELECTRONICS CO., LTD."),
638 DMI_MATCH(DMI_PRODUCT_NAME, "N150P/N210P/N220P"),
639 DMI_MATCH(DMI_BOARD_NAME, "N150P/N210P/N220P"),
640 },
641 .callback = dmi_check_cb,
642 },
643 {
644 .ident = "R530/R730",
645 .matches = {
646 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
647 DMI_MATCH(DMI_PRODUCT_NAME, "R530/R730"),
648 DMI_MATCH(DMI_BOARD_NAME, "R530/R730"),
649 },
650 .callback = dmi_check_cb,
651 },
652 {
653 .ident = "NF110/NF210/NF310",
654 .matches = {
655 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
656 DMI_MATCH(DMI_PRODUCT_NAME, "NF110/NF210/NF310"),
657 DMI_MATCH(DMI_BOARD_NAME, "NF110/NF210/NF310"),
658 },
659 .callback = dmi_check_cb,
660 },
661 {
662 .ident = "N145P/N250P/N260P",
663 .matches = {
664 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
665 DMI_MATCH(DMI_PRODUCT_NAME, "N145P/N250P/N260P"),
666 DMI_MATCH(DMI_BOARD_NAME, "N145P/N250P/N260P"),
667 },
668 .callback = dmi_check_cb,
669 },
670 {
671 .ident = "R70/R71",
672 .matches = {
673 DMI_MATCH(DMI_SYS_VENDOR,
674 "SAMSUNG ELECTRONICS CO., LTD."),
675 DMI_MATCH(DMI_PRODUCT_NAME, "R70/R71"),
676 DMI_MATCH(DMI_BOARD_NAME, "R70/R71"),
677 },
678 .callback = dmi_check_cb,
679 },
680 {
681 .ident = "P460",
682 .matches = {
683 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
684 DMI_MATCH(DMI_PRODUCT_NAME, "P460"),
685 DMI_MATCH(DMI_BOARD_NAME, "P460"),
686 },
687 .callback = dmi_check_cb,
688 },
689 { },
690};
691MODULE_DEVICE_TABLE(dmi, samsung_dmi_table);
692
693static int find_signature(void __iomem *memcheck, const char *testStr)
694{
695 int i = 0;
696 int loca;
697
698 for (loca = 0; loca < 0xffff; loca++) {
699 char temp = readb(memcheck + loca);
700
701 if (temp == testStr[i]) {
702 if (i == strlen(testStr)-1)
703 break;
704 ++i;
705 } else {
706 i = 0;
707 }
708 }
709 return loca;
710}
711
712static int __init samsung_init(void)
713{
714 struct backlight_properties props;
715 struct sabi_retval sretval;
716 unsigned int ifaceP;
717 int i;
718 int loca;
719 int retval;
720
721 mutex_init(&sabi_mutex);
722
723 if (!force && !dmi_check_system(samsung_dmi_table))
724 return -ENODEV;
725
726 f0000_segment = ioremap_nocache(0xf0000, 0xffff);
727 if (!f0000_segment) {
728 pr_err("Can't map the segment at 0xf0000\n");
729 return -EINVAL;
730 }
731
732 /* Try to find one of the signatures in memory to find the header */
733 for (i = 0; sabi_configs[i].test_string != 0; ++i) {
734 sabi_config = &sabi_configs[i];
735 loca = find_signature(f0000_segment, sabi_config->test_string);
736 if (loca != 0xffff)
737 break;
738 }
739
740 if (loca == 0xffff) {
741 pr_err("This computer does not support SABI\n");
742 goto error_no_signature;
743 }
744
745 /* point to the SMI port Number */
746 loca += 1;
747 sabi = (f0000_segment + loca);
748
749 if (debug) {
750 printk(KERN_DEBUG "This computer supports SABI==%x\n",
751 loca + 0xf0000 - 6);
752 printk(KERN_DEBUG "SABI header:\n");
753 printk(KERN_DEBUG " SMI Port Number = 0x%04x\n",
754 readw(sabi + sabi_config->header_offsets.port));
755 printk(KERN_DEBUG " SMI Interface Function = 0x%02x\n",
756 readb(sabi + sabi_config->header_offsets.iface_func));
757 printk(KERN_DEBUG " SMI enable memory buffer = 0x%02x\n",
758 readb(sabi + sabi_config->header_offsets.en_mem));
759 printk(KERN_DEBUG " SMI restore memory buffer = 0x%02x\n",
760 readb(sabi + sabi_config->header_offsets.re_mem));
761 printk(KERN_DEBUG " SABI data offset = 0x%04x\n",
762 readw(sabi + sabi_config->header_offsets.data_offset));
763 printk(KERN_DEBUG " SABI data segment = 0x%04x\n",
764 readw(sabi + sabi_config->header_offsets.data_segment));
765 }
766
767 /* Get a pointer to the SABI Interface */
768 ifaceP = (readw(sabi + sabi_config->header_offsets.data_segment) & 0x0ffff) << 4;
769 ifaceP += readw(sabi + sabi_config->header_offsets.data_offset) & 0x0ffff;
770 sabi_iface = ioremap_nocache(ifaceP, 16);
771 if (!sabi_iface) {
772 pr_err("Can't remap %x\n", ifaceP);
773 goto exit;
774 }
775 if (debug) {
776 printk(KERN_DEBUG "ifaceP = 0x%08x\n", ifaceP);
777 printk(KERN_DEBUG "sabi_iface = %p\n", sabi_iface);
778
779 test_backlight();
780 test_wireless();
781
782 retval = sabi_get_command(sabi_config->commands.get_brightness,
783 &sretval);
784 printk(KERN_DEBUG "brightness = 0x%02x\n", sretval.retval[0]);
785 }
786
787 /* Turn on "Linux" mode in the BIOS */
788 if (sabi_config->commands.set_linux != 0xff) {
789 retval = sabi_set_command(sabi_config->commands.set_linux,
790 0x81);
791 if (retval) {
792 pr_warn("Linux mode was not set!\n");
793 goto error_no_platform;
794 }
795 }
796
797 /* knock up a platform device to hang stuff off of */
798 sdev = platform_device_register_simple("samsung", -1, NULL, 0);
799 if (IS_ERR(sdev))
800 goto error_no_platform;
801
802 /* create a backlight device to talk to this one */
803 memset(&props, 0, sizeof(struct backlight_properties));
804 props.type = BACKLIGHT_PLATFORM;
805 props.max_brightness = sabi_config->max_brightness;
806 backlight_device = backlight_device_register("samsung", &sdev->dev,
807 NULL, &backlight_ops,
808 &props);
809 if (IS_ERR(backlight_device))
810 goto error_no_backlight;
811
812 backlight_device->props.brightness = read_brightness();
813 backlight_device->props.power = FB_BLANK_UNBLANK;
814 backlight_update_status(backlight_device);
815
816 retval = init_wireless(sdev);
817 if (retval)
818 goto error_no_rfk;
819
820 retval = device_create_file(&sdev->dev, &dev_attr_performance_level);
821 if (retval)
822 goto error_file_create;
823
824exit:
825 return 0;
826
827error_file_create:
828 destroy_wireless();
829
830error_no_rfk:
831 backlight_device_unregister(backlight_device);
832
833error_no_backlight:
834 platform_device_unregister(sdev);
835
836error_no_platform:
837 iounmap(sabi_iface);
838
839error_no_signature:
840 iounmap(f0000_segment);
841 return -EINVAL;
842}
843
844static void __exit samsung_exit(void)
845{
846 /* Turn off "Linux" mode in the BIOS */
847 if (sabi_config->commands.set_linux != 0xff)
848 sabi_set_command(sabi_config->commands.set_linux, 0x80);
849
850 device_remove_file(&sdev->dev, &dev_attr_performance_level);
851 backlight_device_unregister(backlight_device);
852 destroy_wireless();
853 iounmap(sabi_iface);
854 iounmap(f0000_segment);
855 platform_device_unregister(sdev);
856}
857
858module_init(samsung_init);
859module_exit(samsung_exit);
860
861MODULE_AUTHOR("Greg Kroah-Hartman <gregkh@suse.de>");
862MODULE_DESCRIPTION("Samsung Backlight driver");
863MODULE_LICENSE("GPL");