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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
27
28
29
30
31
32
33
34
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
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
61
62
63 u8 get_brightness;
64 u8 set_brightness;
65
66
67
68
69
70
71
72
73
74
75 u8 get_wireless_button;
76 u8 set_wireless_button;
77
78
79 u8 get_backlight;
80 u8 set_backlight;
81
82
83
84
85
86 u8 get_recovery_mode;
87 u8 set_recovery_mode;
88
89
90
91
92
93 u8 get_performance_level;
94 u8 set_performance_level;
95
96
97
98
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
248 outb(readb(sabi + sabi_config->header_offsets.en_mem), port);
249
250
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
257 outb(readb(sabi + sabi_config->header_offsets.re_mem), port);
258
259
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
270
271
272
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
294 outb(readb(sabi + sabi_config->header_offsets.en_mem), port);
295
296
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
304 outb(readb(sabi + sabi_config->header_offsets.re_mem), port);
305
306
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
410
411
412
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
458 retval = sabi_get_command(sabi_config->commands.get_performance_level,
459 &sretval);
460 if (retval)
461 return retval;
462
463
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
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
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
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
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
798 sdev = platform_device_register_simple("samsung", -1, NULL, 0);
799 if (IS_ERR(sdev))
800 goto error_no_platform;
801
802
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
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");
864
