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pinctrl: move generic functions to the pinctrl_ namespace
[linux/fpc-iii.git] / drivers / platform / x86 / samsung-laptop.c
blobfd73ea89b857872df7526c5c756872b3b9402f64
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 */
45 struct sabi_retval {
46 u8 retval[20];
47 };
48
49 struct 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
58 struct 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
103 struct sabi_performance_level {
104 const char *name;
105 u8 value;
106 };
107
108 struct 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
118 static 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
220 static const struct sabi_config *sabi_config;
221
222 static void __iomem *sabi;
223 static void __iomem *sabi_iface;
224 static void __iomem *f0000_segment;
225 static struct backlight_device *backlight_device;
226 static struct mutex sabi_mutex;
227 static struct platform_device *sdev;
228 static struct rfkill *rfk;
229 static bool has_stepping_quirk;
230
231 static bool force;
232 module_param(force, bool, 0);
233 MODULE_PARM_DESC(force,
234 "Disable the DMI check and forces the driver to be loaded");
235
236 static bool debug;
237 module_param(debug, bool, S_IRUGO | S_IWUSR);
238 MODULE_PARM_DESC(debug, "Debug enabled or not");
239
240 static int sabi_get_command(u8 command, struct sabi_retval *sretval)
241 {
242 int retval = 0;
243 u16 port = readw(sabi + sabi_config->header_offsets.port);
244 u8 complete, iface_data;
245
246 mutex_lock(&sabi_mutex);
247
248 /* enable memory to be able to write to it */
249 outb(readb(sabi + sabi_config->header_offsets.en_mem), port);
250
251 /* write out the command */
252 writew(sabi_config->main_function, sabi_iface + SABI_IFACE_MAIN);
253 writew(command, sabi_iface + SABI_IFACE_SUB);
254 writeb(0, sabi_iface + SABI_IFACE_COMPLETE);
255 outb(readb(sabi + sabi_config->header_offsets.iface_func), port);
256
257 /* write protect memory to make it safe */
258 outb(readb(sabi + sabi_config->header_offsets.re_mem), port);
259
260 /* see if the command actually succeeded */
261 complete = readb(sabi_iface + SABI_IFACE_COMPLETE);
262 iface_data = readb(sabi_iface + SABI_IFACE_DATA);
263 if (complete != 0xaa || iface_data == 0xff) {
264 pr_warn("SABI get command 0x%02x failed with completion flag 0x%02x and data 0x%02x\n",
265 command, complete, iface_data);
266 retval = -EINVAL;
267 goto exit;
268 }
269 /*
270 * Save off the data into a structure so the caller use it.
271 * Right now we only want the first 4 bytes,
272 * There are commands that need more, but not for the ones we
273 * currently care about.
274 */
275 sretval->retval[0] = readb(sabi_iface + SABI_IFACE_DATA);
276 sretval->retval[1] = readb(sabi_iface + SABI_IFACE_DATA + 1);
277 sretval->retval[2] = readb(sabi_iface + SABI_IFACE_DATA + 2);
278 sretval->retval[3] = readb(sabi_iface + SABI_IFACE_DATA + 3);
279
280 exit:
281 mutex_unlock(&sabi_mutex);
282 return retval;
283
284 }
285
286 static int sabi_set_command(u8 command, u8 data)
287 {
288 int retval = 0;
289 u16 port = readw(sabi + sabi_config->header_offsets.port);
290 u8 complete, iface_data;
291
292 mutex_lock(&sabi_mutex);
293
294 /* enable memory to be able to write to it */
295 outb(readb(sabi + sabi_config->header_offsets.en_mem), port);
296
297 /* write out the command */
298 writew(sabi_config->main_function, sabi_iface + SABI_IFACE_MAIN);
299 writew(command, sabi_iface + SABI_IFACE_SUB);
300 writeb(0, sabi_iface + SABI_IFACE_COMPLETE);
301 writeb(data, sabi_iface + SABI_IFACE_DATA);
302 outb(readb(sabi + sabi_config->header_offsets.iface_func), port);
303
304 /* write protect memory to make it safe */
305 outb(readb(sabi + sabi_config->header_offsets.re_mem), port);
306
307 /* see if the command actually succeeded */
308 complete = readb(sabi_iface + SABI_IFACE_COMPLETE);
309 iface_data = readb(sabi_iface + SABI_IFACE_DATA);
310 if (complete != 0xaa || iface_data == 0xff) {
311 pr_warn("SABI set command 0x%02x failed with completion flag 0x%02x and data 0x%02x\n",
312 command, complete, iface_data);
313 retval = -EINVAL;
314 }
315
316 mutex_unlock(&sabi_mutex);
317 return retval;
318 }
319
320 static void test_backlight(void)
321 {
322 struct sabi_retval sretval;
323
324 sabi_get_command(sabi_config->commands.get_backlight, &sretval);
325 printk(KERN_DEBUG "backlight = 0x%02x\n", sretval.retval[0]);
326
327 sabi_set_command(sabi_config->commands.set_backlight, 0);
328 printk(KERN_DEBUG "backlight should be off\n");
329
330 sabi_get_command(sabi_config->commands.get_backlight, &sretval);
331 printk(KERN_DEBUG "backlight = 0x%02x\n", sretval.retval[0]);
332
333 msleep(1000);
334
335 sabi_set_command(sabi_config->commands.set_backlight, 1);
336 printk(KERN_DEBUG "backlight should be on\n");
337
338 sabi_get_command(sabi_config->commands.get_backlight, &sretval);
339 printk(KERN_DEBUG "backlight = 0x%02x\n", sretval.retval[0]);
340 }
341
342 static void test_wireless(void)
343 {
344 struct sabi_retval sretval;
345
346 sabi_get_command(sabi_config->commands.get_wireless_button, &sretval);
347 printk(KERN_DEBUG "wireless led = 0x%02x\n", sretval.retval[0]);
348
349 sabi_set_command(sabi_config->commands.set_wireless_button, 0);
350 printk(KERN_DEBUG "wireless led should be off\n");
351
352 sabi_get_command(sabi_config->commands.get_wireless_button, &sretval);
353 printk(KERN_DEBUG "wireless led = 0x%02x\n", sretval.retval[0]);
354
355 msleep(1000);
356
357 sabi_set_command(sabi_config->commands.set_wireless_button, 1);
358 printk(KERN_DEBUG "wireless led should be on\n");
359
360 sabi_get_command(sabi_config->commands.get_wireless_button, &sretval);
361 printk(KERN_DEBUG "wireless led = 0x%02x\n", sretval.retval[0]);
362 }
363
364 static u8 read_brightness(void)
365 {
366 struct sabi_retval sretval;
367 int user_brightness = 0;
368 int retval;
369
370 retval = sabi_get_command(sabi_config->commands.get_brightness,
371 &sretval);
372 if (!retval) {
373 user_brightness = sretval.retval[0];
374 if (user_brightness > sabi_config->min_brightness)
375 user_brightness -= sabi_config->min_brightness;
376 else
377 user_brightness = 0;
378 }
379 return user_brightness;
380 }
381
382 static void set_brightness(u8 user_brightness)
383 {
384 u8 user_level = user_brightness + sabi_config->min_brightness;
385
386 if (has_stepping_quirk && user_level != 0) {
387 /*
388 * short circuit if the specified level is what's already set
389 * to prevent the screen from flickering needlessly
390 */
391 if (user_brightness == read_brightness())
392 return;
393
394 sabi_set_command(sabi_config->commands.set_brightness, 0);
395 }
396
397 sabi_set_command(sabi_config->commands.set_brightness, user_level);
398 }
399
400 static int get_brightness(struct backlight_device *bd)
401 {
402 return (int)read_brightness();
403 }
404
405 static void check_for_stepping_quirk(void)
406 {
407 u8 initial_level;
408 u8 check_level;
409 u8 orig_level = read_brightness();
410
411 /*
412 * Some laptops exhibit the strange behaviour of stepping toward
413 * (rather than setting) the brightness except when changing to/from
414 * brightness level 0. This behaviour is checked for here and worked
415 * around in set_brightness.
416 */
417
418 if (orig_level == 0)
419 set_brightness(1);
420
421 initial_level = read_brightness();
422
423 if (initial_level <= 2)
424 check_level = initial_level + 2;
425 else
426 check_level = initial_level - 2;
427
428 has_stepping_quirk = false;
429 set_brightness(check_level);
430
431 if (read_brightness() != check_level) {
432 has_stepping_quirk = true;
433 pr_info("enabled workaround for brightness stepping quirk\n");
434 }
435
436 set_brightness(orig_level);
437 }
438
439 static int update_status(struct backlight_device *bd)
440 {
441 set_brightness(bd->props.brightness);
442
443 if (bd->props.power == FB_BLANK_UNBLANK)
444 sabi_set_command(sabi_config->commands.set_backlight, 1);
445 else
446 sabi_set_command(sabi_config->commands.set_backlight, 0);
447 return 0;
448 }
449
450 static const struct backlight_ops backlight_ops = {
451 .get_brightness = get_brightness,
452 .update_status = update_status,
453 };
454
455 static int rfkill_set(void *data, bool blocked)
456 {
457 /* Do something with blocked...*/
458 /*
459 * blocked == false is on
460 * blocked == true is off
461 */
462 if (blocked)
463 sabi_set_command(sabi_config->commands.set_wireless_button, 0);
464 else
465 sabi_set_command(sabi_config->commands.set_wireless_button, 1);
466
467 return 0;
468 }
469
470 static struct rfkill_ops rfkill_ops = {
471 .set_block = rfkill_set,
472 };
473
474 static int init_wireless(struct platform_device *sdev)
475 {
476 int retval;
477
478 rfk = rfkill_alloc("samsung-wifi", &sdev->dev, RFKILL_TYPE_WLAN,
479 &rfkill_ops, NULL);
480 if (!rfk)
481 return -ENOMEM;
482
483 retval = rfkill_register(rfk);
484 if (retval) {
485 rfkill_destroy(rfk);
486 return -ENODEV;
487 }
488
489 return 0;
490 }
491
492 static void destroy_wireless(void)
493 {
494 rfkill_unregister(rfk);
495 rfkill_destroy(rfk);
496 }
497
498 static ssize_t get_performance_level(struct device *dev,
499 struct device_attribute *attr, char *buf)
500 {
501 struct sabi_retval sretval;
502 int retval;
503 int i;
504
505 /* Read the state */
506 retval = sabi_get_command(sabi_config->commands.get_performance_level,
507 &sretval);
508 if (retval)
509 return retval;
510
511 /* The logic is backwards, yeah, lots of fun... */
512 for (i = 0; sabi_config->performance_levels[i].name; ++i) {
513 if (sretval.retval[0] == sabi_config->performance_levels[i].value)
514 return sprintf(buf, "%s\n", sabi_config->performance_levels[i].name);
515 }
516 return sprintf(buf, "%s\n", "unknown");
517 }
518
519 static ssize_t set_performance_level(struct device *dev,
520 struct device_attribute *attr, const char *buf,
521 size_t count)
522 {
523 if (count >= 1) {
524 int i;
525 for (i = 0; sabi_config->performance_levels[i].name; ++i) {
526 const struct sabi_performance_level *level =
527 &sabi_config->performance_levels[i];
528 if (!strncasecmp(level->name, buf, strlen(level->name))) {
529 sabi_set_command(sabi_config->commands.set_performance_level,
530 level->value);
531 break;
532 }
533 }
534 if (!sabi_config->performance_levels[i].name)
535 return -EINVAL;
536 }
537 return count;
538 }
539 static DEVICE_ATTR(performance_level, S_IWUSR | S_IRUGO,
540 get_performance_level, set_performance_level);
541
542
543 static int __init dmi_check_cb(const struct dmi_system_id *id)
544 {
545 pr_info("found laptop model '%s'\n",
546 id->ident);
547 return 1;
548 }
549
550 static struct dmi_system_id __initdata samsung_dmi_table[] = {
551 {
552 .ident = "N128",
553 .matches = {
554 DMI_MATCH(DMI_SYS_VENDOR,
555 "SAMSUNG ELECTRONICS CO., LTD."),
556 DMI_MATCH(DMI_PRODUCT_NAME, "N128"),
557 DMI_MATCH(DMI_BOARD_NAME, "N128"),
558 },
559 .callback = dmi_check_cb,
560 },
561 {
562 .ident = "N130",
563 .matches = {
564 DMI_MATCH(DMI_SYS_VENDOR,
565 "SAMSUNG ELECTRONICS CO., LTD."),
566 DMI_MATCH(DMI_PRODUCT_NAME, "N130"),
567 DMI_MATCH(DMI_BOARD_NAME, "N130"),
568 },
569 .callback = dmi_check_cb,
570 },
571 {
572 .ident = "N510",
573 .matches = {
574 DMI_MATCH(DMI_SYS_VENDOR,
575 "SAMSUNG ELECTRONICS CO., LTD."),
576 DMI_MATCH(DMI_PRODUCT_NAME, "N510"),
577 DMI_MATCH(DMI_BOARD_NAME, "N510"),
578 },
579 .callback = dmi_check_cb,
580 },
581 {
582 .ident = "X125",
583 .matches = {
584 DMI_MATCH(DMI_SYS_VENDOR,
585 "SAMSUNG ELECTRONICS CO., LTD."),
586 DMI_MATCH(DMI_PRODUCT_NAME, "X125"),
587 DMI_MATCH(DMI_BOARD_NAME, "X125"),
588 },
589 .callback = dmi_check_cb,
590 },
591 {
592 .ident = "X120/X170",
593 .matches = {
594 DMI_MATCH(DMI_SYS_VENDOR,
595 "SAMSUNG ELECTRONICS CO., LTD."),
596 DMI_MATCH(DMI_PRODUCT_NAME, "X120/X170"),
597 DMI_MATCH(DMI_BOARD_NAME, "X120/X170"),
598 },
599 .callback = dmi_check_cb,
600 },
601 {
602 .ident = "NC10",
603 .matches = {
604 DMI_MATCH(DMI_SYS_VENDOR,
605 "SAMSUNG ELECTRONICS CO., LTD."),
606 DMI_MATCH(DMI_PRODUCT_NAME, "NC10"),
607 DMI_MATCH(DMI_BOARD_NAME, "NC10"),
608 },
609 .callback = dmi_check_cb,
610 },
611 {
612 .ident = "NP-Q45",
613 .matches = {
614 DMI_MATCH(DMI_SYS_VENDOR,
615 "SAMSUNG ELECTRONICS CO., LTD."),
616 DMI_MATCH(DMI_PRODUCT_NAME, "SQ45S70S"),
617 DMI_MATCH(DMI_BOARD_NAME, "SQ45S70S"),
618 },
619 .callback = dmi_check_cb,
620 },
621 {
622 .ident = "X360",
623 .matches = {
624 DMI_MATCH(DMI_SYS_VENDOR,
625 "SAMSUNG ELECTRONICS CO., LTD."),
626 DMI_MATCH(DMI_PRODUCT_NAME, "X360"),
627 DMI_MATCH(DMI_BOARD_NAME, "X360"),
628 },
629 .callback = dmi_check_cb,
630 },
631 {
632 .ident = "R410 Plus",
633 .matches = {
634 DMI_MATCH(DMI_SYS_VENDOR,
635 "SAMSUNG ELECTRONICS CO., LTD."),
636 DMI_MATCH(DMI_PRODUCT_NAME, "R410P"),
637 DMI_MATCH(DMI_BOARD_NAME, "R460"),
638 },
639 .callback = dmi_check_cb,
640 },
641 {
642 .ident = "R518",
643 .matches = {
644 DMI_MATCH(DMI_SYS_VENDOR,
645 "SAMSUNG ELECTRONICS CO., LTD."),
646 DMI_MATCH(DMI_PRODUCT_NAME, "R518"),
647 DMI_MATCH(DMI_BOARD_NAME, "R518"),
648 },
649 .callback = dmi_check_cb,
650 },
651 {
652 .ident = "R519/R719",
653 .matches = {
654 DMI_MATCH(DMI_SYS_VENDOR,
655 "SAMSUNG ELECTRONICS CO., LTD."),
656 DMI_MATCH(DMI_PRODUCT_NAME, "R519/R719"),
657 DMI_MATCH(DMI_BOARD_NAME, "R519/R719"),
658 },
659 .callback = dmi_check_cb,
660 },
661 {
662 .ident = "N150/N210/N220",
663 .matches = {
664 DMI_MATCH(DMI_SYS_VENDOR,
665 "SAMSUNG ELECTRONICS CO., LTD."),
666 DMI_MATCH(DMI_PRODUCT_NAME, "N150/N210/N220"),
667 DMI_MATCH(DMI_BOARD_NAME, "N150/N210/N220"),
668 },
669 .callback = dmi_check_cb,
670 },
671 {
672 .ident = "N220",
673 .matches = {
674 DMI_MATCH(DMI_SYS_VENDOR,
675 "SAMSUNG ELECTRONICS CO., LTD."),
676 DMI_MATCH(DMI_PRODUCT_NAME, "N220"),
677 DMI_MATCH(DMI_BOARD_NAME, "N220"),
678 },
679 .callback = dmi_check_cb,
680 },
681 {
682 .ident = "N150/N210/N220/N230",
683 .matches = {
684 DMI_MATCH(DMI_SYS_VENDOR,
685 "SAMSUNG ELECTRONICS CO., LTD."),
686 DMI_MATCH(DMI_PRODUCT_NAME, "N150/N210/N220/N230"),
687 DMI_MATCH(DMI_BOARD_NAME, "N150/N210/N220/N230"),
688 },
689 .callback = dmi_check_cb,
690 },
691 {
692 .ident = "N150P/N210P/N220P",
693 .matches = {
694 DMI_MATCH(DMI_SYS_VENDOR,
695 "SAMSUNG ELECTRONICS CO., LTD."),
696 DMI_MATCH(DMI_PRODUCT_NAME, "N150P/N210P/N220P"),
697 DMI_MATCH(DMI_BOARD_NAME, "N150P/N210P/N220P"),
698 },
699 .callback = dmi_check_cb,
700 },
701 {
702 .ident = "R700",
703 .matches = {
704 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
705 DMI_MATCH(DMI_PRODUCT_NAME, "SR700"),
706 DMI_MATCH(DMI_BOARD_NAME, "SR700"),
707 },
708 .callback = dmi_check_cb,
709 },
710 {
711 .ident = "R530/R730",
712 .matches = {
713 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
714 DMI_MATCH(DMI_PRODUCT_NAME, "R530/R730"),
715 DMI_MATCH(DMI_BOARD_NAME, "R530/R730"),
716 },
717 .callback = dmi_check_cb,
718 },
719 {
720 .ident = "NF110/NF210/NF310",
721 .matches = {
722 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
723 DMI_MATCH(DMI_PRODUCT_NAME, "NF110/NF210/NF310"),
724 DMI_MATCH(DMI_BOARD_NAME, "NF110/NF210/NF310"),
725 },
726 .callback = dmi_check_cb,
727 },
728 {
729 .ident = "N145P/N250P/N260P",
730 .matches = {
731 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
732 DMI_MATCH(DMI_PRODUCT_NAME, "N145P/N250P/N260P"),
733 DMI_MATCH(DMI_BOARD_NAME, "N145P/N250P/N260P"),
734 },
735 .callback = dmi_check_cb,
736 },
737 {
738 .ident = "R70/R71",
739 .matches = {
740 DMI_MATCH(DMI_SYS_VENDOR,
741 "SAMSUNG ELECTRONICS CO., LTD."),
742 DMI_MATCH(DMI_PRODUCT_NAME, "R70/R71"),
743 DMI_MATCH(DMI_BOARD_NAME, "R70/R71"),
744 },
745 .callback = dmi_check_cb,
746 },
747 {
748 .ident = "P460",
749 .matches = {
750 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
751 DMI_MATCH(DMI_PRODUCT_NAME, "P460"),
752 DMI_MATCH(DMI_BOARD_NAME, "P460"),
753 },
754 .callback = dmi_check_cb,
755 },
756 {
757 .ident = "R528/R728",
758 .matches = {
759 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
760 DMI_MATCH(DMI_PRODUCT_NAME, "R528/R728"),
761 DMI_MATCH(DMI_BOARD_NAME, "R528/R728"),
762 },
763 .callback = dmi_check_cb,
764 },
765 {
766 .ident = "NC210/NC110",
767 .matches = {
768 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
769 DMI_MATCH(DMI_PRODUCT_NAME, "NC210/NC110"),
770 DMI_MATCH(DMI_BOARD_NAME, "NC210/NC110"),
771 },
772 .callback = dmi_check_cb,
773 },
774 {
775 .ident = "X520",
776 .matches = {
777 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
778 DMI_MATCH(DMI_PRODUCT_NAME, "X520"),
779 DMI_MATCH(DMI_BOARD_NAME, "X520"),
780 },
781 .callback = dmi_check_cb,
782 },
783 { },
784 };
785 MODULE_DEVICE_TABLE(dmi, samsung_dmi_table);
786
787 static int find_signature(void __iomem *memcheck, const char *testStr)
788 {
789 int i = 0;
790 int loca;
791
792 for (loca = 0; loca < 0xffff; loca++) {
793 char temp = readb(memcheck + loca);
794
795 if (temp == testStr[i]) {
796 if (i == strlen(testStr)-1)
797 break;
798 ++i;
799 } else {
800 i = 0;
801 }
802 }
803 return loca;
804 }
805
806 static int __init samsung_init(void)
807 {
808 struct backlight_properties props;
809 struct sabi_retval sretval;
810 unsigned int ifaceP;
811 int i;
812 int loca;
813 int retval;
814
815 mutex_init(&sabi_mutex);
816
817 if (!force && !dmi_check_system(samsung_dmi_table))
818 return -ENODEV;
819
820 f0000_segment = ioremap_nocache(0xf0000, 0xffff);
821 if (!f0000_segment) {
822 pr_err("Can't map the segment at 0xf0000\n");
823 return -EINVAL;
824 }
825
826 /* Try to find one of the signatures in memory to find the header */
827 for (i = 0; sabi_configs[i].test_string != 0; ++i) {
828 sabi_config = &sabi_configs[i];
829 loca = find_signature(f0000_segment, sabi_config->test_string);
830 if (loca != 0xffff)
831 break;
832 }
833
834 if (loca == 0xffff) {
835 pr_err("This computer does not support SABI\n");
836 goto error_no_signature;
837 }
838
839 /* point to the SMI port Number */
840 loca += 1;
841 sabi = (f0000_segment + loca);
842
843 if (debug) {
844 printk(KERN_DEBUG "This computer supports SABI==%x\n",
845 loca + 0xf0000 - 6);
846 printk(KERN_DEBUG "SABI header:\n");
847 printk(KERN_DEBUG " SMI Port Number = 0x%04x\n",
848 readw(sabi + sabi_config->header_offsets.port));
849 printk(KERN_DEBUG " SMI Interface Function = 0x%02x\n",
850 readb(sabi + sabi_config->header_offsets.iface_func));
851 printk(KERN_DEBUG " SMI enable memory buffer = 0x%02x\n",
852 readb(sabi + sabi_config->header_offsets.en_mem));
853 printk(KERN_DEBUG " SMI restore memory buffer = 0x%02x\n",
854 readb(sabi + sabi_config->header_offsets.re_mem));
855 printk(KERN_DEBUG " SABI data offset = 0x%04x\n",
856 readw(sabi + sabi_config->header_offsets.data_offset));
857 printk(KERN_DEBUG " SABI data segment = 0x%04x\n",
858 readw(sabi + sabi_config->header_offsets.data_segment));
859 }
860
861 /* Get a pointer to the SABI Interface */
862 ifaceP = (readw(sabi + sabi_config->header_offsets.data_segment) & 0x0ffff) << 4;
863 ifaceP += readw(sabi + sabi_config->header_offsets.data_offset) & 0x0ffff;
864 sabi_iface = ioremap_nocache(ifaceP, 16);
865 if (!sabi_iface) {
866 pr_err("Can't remap %x\n", ifaceP);
867 goto error_no_signature;
868 }
869 if (debug) {
870 printk(KERN_DEBUG "ifaceP = 0x%08x\n", ifaceP);
871 printk(KERN_DEBUG "sabi_iface = %p\n", sabi_iface);
872
873 test_backlight();
874 test_wireless();
875
876 retval = sabi_get_command(sabi_config->commands.get_brightness,
877 &sretval);
878 printk(KERN_DEBUG "brightness = 0x%02x\n", sretval.retval[0]);
879 }
880
881 /* Turn on "Linux" mode in the BIOS */
882 if (sabi_config->commands.set_linux != 0xff) {
883 retval = sabi_set_command(sabi_config->commands.set_linux,
884 0x81);
885 if (retval) {
886 pr_warn("Linux mode was not set!\n");
887 goto error_no_platform;
888 }
889 }
890
891 /* Check for stepping quirk */
892 check_for_stepping_quirk();
893
894 /* knock up a platform device to hang stuff off of */
895 sdev = platform_device_register_simple("samsung", -1, NULL, 0);
896 if (IS_ERR(sdev))
897 goto error_no_platform;
898
899 /* create a backlight device to talk to this one */
900 memset(&props, 0, sizeof(struct backlight_properties));
901 props.type = BACKLIGHT_PLATFORM;
902 props.max_brightness = sabi_config->max_brightness -
903 sabi_config->min_brightness;
904 backlight_device = backlight_device_register("samsung", &sdev->dev,
905 NULL, &backlight_ops,
906 &props);
907 if (IS_ERR(backlight_device))
908 goto error_no_backlight;
909
910 backlight_device->props.brightness = read_brightness();
911 backlight_device->props.power = FB_BLANK_UNBLANK;
912 backlight_update_status(backlight_device);
913
914 retval = init_wireless(sdev);
915 if (retval)
916 goto error_no_rfk;
917
918 retval = device_create_file(&sdev->dev, &dev_attr_performance_level);
919 if (retval)
920 goto error_file_create;
921
922 return 0;
923
924 error_file_create:
925 destroy_wireless();
926
927 error_no_rfk:
928 backlight_device_unregister(backlight_device);
929
930 error_no_backlight:
931 platform_device_unregister(sdev);
932
933 error_no_platform:
934 iounmap(sabi_iface);
935
936 error_no_signature:
937 iounmap(f0000_segment);
938 return -EINVAL;
939 }
940
941 static void __exit samsung_exit(void)
942 {
943 /* Turn off "Linux" mode in the BIOS */
944 if (sabi_config->commands.set_linux != 0xff)
945 sabi_set_command(sabi_config->commands.set_linux, 0x80);
946
947 device_remove_file(&sdev->dev, &dev_attr_performance_level);
948 backlight_device_unregister(backlight_device);
949 destroy_wireless();
950 iounmap(sabi_iface);
951 iounmap(f0000_segment);
952 platform_device_unregister(sdev);
953 }
954
955 module_init(samsung_init);
956 module_exit(samsung_exit);
957
958 MODULE_AUTHOR("Greg Kroah-Hartman <gregkh@suse.de>");
959 MODULE_DESCRIPTION("Samsung Backlight driver");
960 MODULE_LICENSE("GPL");
Linux with added FPC-III support