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acer-wmi: Add wireless quirk for Lenovo 3000 N200
[mirror_ubuntu-focal-kernel.git] / drivers / platform / x86 / samsung-laptop.c
CommitLineData
2d70b73a
GKH		 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;
ac080523 229static bool has_stepping_quirk;
2d70b73a
GKH		 230
231static int force;
232module_param(force, bool, 0);
233MODULE_PARM_DESC(force,
234 "Disable the DMI check and forces the driver to be loaded");
235
236static int debug;
237module_param(debug, bool, S_IRUGO | S_IWUSR);
238MODULE_PARM_DESC(debug, "Debug enabled or not");
239
240static 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
280exit:
281 mutex_unlock(&sabi_mutex);
282 return retval;
283
284}
285
286static 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
320static 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
342static 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
364static 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];
bee460be 374 if (user_brightness > sabi_config->min_brightness)
2d70b73a 375 user_brightness -= sabi_config->min_brightness;
bee460be
JS		 376 else
377 user_brightness = 0;
2d70b73a
GKH		 378 }
379 return user_brightness;
380}
381
382static void set_brightness(u8 user_brightness)
383{
bee460be 384 u8 user_level = user_brightness + sabi_config->min_brightness;
2d70b73a 385
ac080523
JS		 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
2d70b73a
GKH		 397 sabi_set_command(sabi_config->commands.set_brightness, user_level);
398}
399
400static int get_brightness(struct backlight_device *bd)
401{
402 return (int)read_brightness();
403}
404
ac080523
JS		 405static void check_for_stepping_quirk(void)
406{
407 u8 initial_level = read_brightness();
408 u8 check_level;
409
410 /*
411 * Some laptops exhibit the strange behaviour of stepping toward
412 * (rather than setting) the brightness except when changing to/from
413 * brightness level 0. This behaviour is checked for here and worked
414 * around in set_brightness.
415 */
416
417 if (initial_level <= 2)
418 check_level = initial_level + 2;
419 else
420 check_level = initial_level - 2;
421
422 has_stepping_quirk = false;
423 set_brightness(check_level);
424
425 if (read_brightness() != check_level) {
426 has_stepping_quirk = true;
427 pr_info("enabled workaround for brightness stepping quirk\n");
428 }
429
430 set_brightness(initial_level);
431}
432
2d70b73a
GKH		 433static int update_status(struct backlight_device *bd)
434{
435 set_brightness(bd->props.brightness);
436
437 if (bd->props.power == FB_BLANK_UNBLANK)
438 sabi_set_command(sabi_config->commands.set_backlight, 1);
439 else
440 sabi_set_command(sabi_config->commands.set_backlight, 0);
441 return 0;
442}
443
444static const struct backlight_ops backlight_ops = {
445 .get_brightness = get_brightness,
446 .update_status = update_status,
447};
448
449static int rfkill_set(void *data, bool blocked)
450{
451 /* Do something with blocked...*/
452 /*
453 * blocked == false is on
454 * blocked == true is off
455 */
456 if (blocked)
457 sabi_set_command(sabi_config->commands.set_wireless_button, 0);
458 else
459 sabi_set_command(sabi_config->commands.set_wireless_button, 1);
460
461 return 0;
462}
463
464static struct rfkill_ops rfkill_ops = {
465 .set_block = rfkill_set,
466};
467
468static int init_wireless(struct platform_device *sdev)
469{
470 int retval;
471
472 rfk = rfkill_alloc("samsung-wifi", &sdev->dev, RFKILL_TYPE_WLAN,
473 &rfkill_ops, NULL);
474 if (!rfk)
475 return -ENOMEM;
476
477 retval = rfkill_register(rfk);
478 if (retval) {
479 rfkill_destroy(rfk);
480 return -ENODEV;
481 }
482
483 return 0;
484}
485
486static void destroy_wireless(void)
487{
488 rfkill_unregister(rfk);
489 rfkill_destroy(rfk);
490}
491
492static ssize_t get_performance_level(struct device *dev,
493 struct device_attribute *attr, char *buf)
494{
495 struct sabi_retval sretval;
496 int retval;
497 int i;
498
499 /* Read the state */
500 retval = sabi_get_command(sabi_config->commands.get_performance_level,
501 &sretval);
502 if (retval)
503 return retval;
504
505 /* The logic is backwards, yeah, lots of fun... */
506 for (i = 0; sabi_config->performance_levels[i].name; ++i) {
507 if (sretval.retval[0] == sabi_config->performance_levels[i].value)
508 return sprintf(buf, "%s\n", sabi_config->performance_levels[i].name);
509 }
510 return sprintf(buf, "%s\n", "unknown");
511}
512
513static ssize_t set_performance_level(struct device *dev,
514 struct device_attribute *attr, const char *buf,
515 size_t count)
516{
517 if (count >= 1) {
518 int i;
519 for (i = 0; sabi_config->performance_levels[i].name; ++i) {
520 const struct sabi_performance_level *level =
521 &sabi_config->performance_levels[i];
522 if (!strncasecmp(level->name, buf, strlen(level->name))) {
523 sabi_set_command(sabi_config->commands.set_performance_level,
524 level->value);
525 break;
526 }
527 }
528 if (!sabi_config->performance_levels[i].name)
529 return -EINVAL;
530 }
531 return count;
532}
533static DEVICE_ATTR(performance_level, S_IWUSR | S_IRUGO,
534 get_performance_level, set_performance_level);
535
536
537static int __init dmi_check_cb(const struct dmi_system_id *id)
538{
539 pr_info("found laptop model '%s'\n",
540 id->ident);
27836584 541 return 1;
2d70b73a
GKH		 542}
543
544static struct dmi_system_id __initdata samsung_dmi_table[] = {
545 {
546 .ident = "N128",
547 .matches = {
548 DMI_MATCH(DMI_SYS_VENDOR,
549 "SAMSUNG ELECTRONICS CO., LTD."),
550 DMI_MATCH(DMI_PRODUCT_NAME, "N128"),
551 DMI_MATCH(DMI_BOARD_NAME, "N128"),
552 },
553 .callback = dmi_check_cb,
554 },
555 {
556 .ident = "N130",
557 .matches = {
558 DMI_MATCH(DMI_SYS_VENDOR,
559 "SAMSUNG ELECTRONICS CO., LTD."),
560 DMI_MATCH(DMI_PRODUCT_NAME, "N130"),
561 DMI_MATCH(DMI_BOARD_NAME, "N130"),
562 },
563 .callback = dmi_check_cb,
4e2441c0
W		 564 },
565 {
566 .ident = "N510",
567 .matches = {
568 DMI_MATCH(DMI_SYS_VENDOR,
569 "SAMSUNG ELECTRONICS CO., LTD."),
570 DMI_MATCH(DMI_PRODUCT_NAME, "N510"),
571 DMI_MATCH(DMI_BOARD_NAME, "N510"),
572 },
573 .callback = dmi_check_cb,
2d70b73a
GKH		 574 },
575 {
576 .ident = "X125",
577 .matches = {
578 DMI_MATCH(DMI_SYS_VENDOR,
579 "SAMSUNG ELECTRONICS CO., LTD."),
580 DMI_MATCH(DMI_PRODUCT_NAME, "X125"),
581 DMI_MATCH(DMI_BOARD_NAME, "X125"),
582 },
583 .callback = dmi_check_cb,
584 },
585 {
586 .ident = "X120/X170",
587 .matches = {
588 DMI_MATCH(DMI_SYS_VENDOR,
589 "SAMSUNG ELECTRONICS CO., LTD."),
590 DMI_MATCH(DMI_PRODUCT_NAME, "X120/X170"),
591 DMI_MATCH(DMI_BOARD_NAME, "X120/X170"),
592 },
593 .callback = dmi_check_cb,
594 },
595 {
596 .ident = "NC10",
597 .matches = {
598 DMI_MATCH(DMI_SYS_VENDOR,
599 "SAMSUNG ELECTRONICS CO., LTD."),
600 DMI_MATCH(DMI_PRODUCT_NAME, "NC10"),
601 DMI_MATCH(DMI_BOARD_NAME, "NC10"),
602 },
603 .callback = dmi_check_cb,
604 },
605 {
606 .ident = "NP-Q45",
607 .matches = {
608 DMI_MATCH(DMI_SYS_VENDOR,
609 "SAMSUNG ELECTRONICS CO., LTD."),
610 DMI_MATCH(DMI_PRODUCT_NAME, "SQ45S70S"),
611 DMI_MATCH(DMI_BOARD_NAME, "SQ45S70S"),
612 },
613 .callback = dmi_check_cb,
614 },
615 {
616 .ident = "X360",
617 .matches = {
618 DMI_MATCH(DMI_SYS_VENDOR,
619 "SAMSUNG ELECTRONICS CO., LTD."),
620 DMI_MATCH(DMI_PRODUCT_NAME, "X360"),
621 DMI_MATCH(DMI_BOARD_NAME, "X360"),
622 },
623 .callback = dmi_check_cb,
624 },
3d536ed4
AM		 625 {
626 .ident = "R410 Plus",
627 .matches = {
628 DMI_MATCH(DMI_SYS_VENDOR,
629 "SAMSUNG ELECTRONICS CO., LTD."),
630 DMI_MATCH(DMI_PRODUCT_NAME, "R410P"),
631 DMI_MATCH(DMI_BOARD_NAME, "R460"),
632 },
633 .callback = dmi_check_cb,
634 },
2d70b73a
GKH		 635 {
636 .ident = "R518",
637 .matches = {
638 DMI_MATCH(DMI_SYS_VENDOR,
639 "SAMSUNG ELECTRONICS CO., LTD."),
640 DMI_MATCH(DMI_PRODUCT_NAME, "R518"),
641 DMI_MATCH(DMI_BOARD_NAME, "R518"),
642 },
643 .callback = dmi_check_cb,
644 },
645 {
646 .ident = "R519/R719",
647 .matches = {
648 DMI_MATCH(DMI_SYS_VENDOR,
649 "SAMSUNG ELECTRONICS CO., LTD."),
650 DMI_MATCH(DMI_PRODUCT_NAME, "R519/R719"),
651 DMI_MATCH(DMI_BOARD_NAME, "R519/R719"),
652 },
653 .callback = dmi_check_cb,
654 },
78a7539b
TC		 655 {
656 .ident = "N150/N210/N220",
657 .matches = {
658 DMI_MATCH(DMI_SYS_VENDOR,
659 "SAMSUNG ELECTRONICS CO., LTD."),
660 DMI_MATCH(DMI_PRODUCT_NAME, "N150/N210/N220"),
661 DMI_MATCH(DMI_BOARD_NAME, "N150/N210/N220"),
662 },
663 .callback = dmi_check_cb,
664 },
f689c875
RGS		 665 {
666 .ident = "N220",
667 .matches = {
668 DMI_MATCH(DMI_SYS_VENDOR,
669 "SAMSUNG ELECTRONICS CO., LTD."),
670 DMI_MATCH(DMI_PRODUCT_NAME, "N220"),
671 DMI_MATCH(DMI_BOARD_NAME, "N220"),
672 },
673 .callback = dmi_check_cb,
674 },
2d70b73a 675 {
10165072 676 .ident = "N150/N210/N220/N230",
2d70b73a
GKH		 677 .matches = {
678 DMI_MATCH(DMI_SYS_VENDOR,
679 "SAMSUNG ELECTRONICS CO., LTD."),
10165072
GKH		 680 DMI_MATCH(DMI_PRODUCT_NAME, "N150/N210/N220/N230"),
681 DMI_MATCH(DMI_BOARD_NAME, "N150/N210/N220/N230"),
2d70b73a
GKH		 682 },
683 .callback = dmi_check_cb,
684 },
685 {
686 .ident = "N150P/N210P/N220P",
687 .matches = {
688 DMI_MATCH(DMI_SYS_VENDOR,
689 "SAMSUNG ELECTRONICS CO., LTD."),
690 DMI_MATCH(DMI_PRODUCT_NAME, "N150P/N210P/N220P"),
691 DMI_MATCH(DMI_BOARD_NAME, "N150P/N210P/N220P"),
692 },
693 .callback = dmi_check_cb,
694 },
695 {
696 .ident = "R530/R730",
697 .matches = {
698 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
699 DMI_MATCH(DMI_PRODUCT_NAME, "R530/R730"),
700 DMI_MATCH(DMI_BOARD_NAME, "R530/R730"),
701 },
702 .callback = dmi_check_cb,
703 },
704 {
705 .ident = "NF110/NF210/NF310",
706 .matches = {
707 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
708 DMI_MATCH(DMI_PRODUCT_NAME, "NF110/NF210/NF310"),
709 DMI_MATCH(DMI_BOARD_NAME, "NF110/NF210/NF310"),
710 },
711 .callback = dmi_check_cb,
712 },
713 {
714 .ident = "N145P/N250P/N260P",
715 .matches = {
716 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
717 DMI_MATCH(DMI_PRODUCT_NAME, "N145P/N250P/N260P"),
718 DMI_MATCH(DMI_BOARD_NAME, "N145P/N250P/N260P"),
719 },
720 .callback = dmi_check_cb,
721 },
722 {
723 .ident = "R70/R71",
724 .matches = {
725 DMI_MATCH(DMI_SYS_VENDOR,
726 "SAMSUNG ELECTRONICS CO., LTD."),
727 DMI_MATCH(DMI_PRODUCT_NAME, "R70/R71"),
728 DMI_MATCH(DMI_BOARD_NAME, "R70/R71"),
729 },
730 .callback = dmi_check_cb,
731 },
732 {
733 .ident = "P460",
734 .matches = {
735 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
736 DMI_MATCH(DMI_PRODUCT_NAME, "P460"),
737 DMI_MATCH(DMI_BOARD_NAME, "P460"),
738 },
739 .callback = dmi_check_cb,
740 },
093ed561
SA		 741 {
742 .ident = "R528/R728",
743 .matches = {
744 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
745 DMI_MATCH(DMI_PRODUCT_NAME, "R528/R728"),
746 DMI_MATCH(DMI_BOARD_NAME, "R528/R728"),
747 },
748 .callback = dmi_check_cb,
749 },
7b3c257c
JS		 750 {
751 .ident = "NC210/NC110",
752 .matches = {
753 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
754 DMI_MATCH(DMI_PRODUCT_NAME, "NC210/NC110"),
755 DMI_MATCH(DMI_BOARD_NAME, "NC210/NC110"),
756 },
757 .callback = dmi_check_cb,
758 },
2d70b73a
GKH		 759 { },
760};
761MODULE_DEVICE_TABLE(dmi, samsung_dmi_table);
762
763static int find_signature(void __iomem *memcheck, const char *testStr)
764{
765 int i = 0;
766 int loca;
767
768 for (loca = 0; loca < 0xffff; loca++) {
769 char temp = readb(memcheck + loca);
770
771 if (temp == testStr[i]) {
772 if (i == strlen(testStr)-1)
773 break;
774 ++i;
775 } else {
776 i = 0;
777 }
778 }
779 return loca;
780}
781
782static int __init samsung_init(void)
783{
784 struct backlight_properties props;
785 struct sabi_retval sretval;
786 unsigned int ifaceP;
787 int i;
788 int loca;
789 int retval;
790
791 mutex_init(&sabi_mutex);
792
793 if (!force && !dmi_check_system(samsung_dmi_table))
794 return -ENODEV;
795
796 f0000_segment = ioremap_nocache(0xf0000, 0xffff);
797 if (!f0000_segment) {
798 pr_err("Can't map the segment at 0xf0000\n");
799 return -EINVAL;
800 }
801
802 /* Try to find one of the signatures in memory to find the header */
803 for (i = 0; sabi_configs[i].test_string != 0; ++i) {
804 sabi_config = &sabi_configs[i];
805 loca = find_signature(f0000_segment, sabi_config->test_string);
806 if (loca != 0xffff)
807 break;
808 }
809
810 if (loca == 0xffff) {
811 pr_err("This computer does not support SABI\n");
812 goto error_no_signature;
813 }
814
815 /* point to the SMI port Number */
816 loca += 1;
817 sabi = (f0000_segment + loca);
818
819 if (debug) {
820 printk(KERN_DEBUG "This computer supports SABI==%x\n",
821 loca + 0xf0000 - 6);
822 printk(KERN_DEBUG "SABI header:\n");
823 printk(KERN_DEBUG " SMI Port Number = 0x%04x\n",
824 readw(sabi + sabi_config->header_offsets.port));
825 printk(KERN_DEBUG " SMI Interface Function = 0x%02x\n",
826 readb(sabi + sabi_config->header_offsets.iface_func));
827 printk(KERN_DEBUG " SMI enable memory buffer = 0x%02x\n",
828 readb(sabi + sabi_config->header_offsets.en_mem));
829 printk(KERN_DEBUG " SMI restore memory buffer = 0x%02x\n",
830 readb(sabi + sabi_config->header_offsets.re_mem));
831 printk(KERN_DEBUG " SABI data offset = 0x%04x\n",
832 readw(sabi + sabi_config->header_offsets.data_offset));
833 printk(KERN_DEBUG " SABI data segment = 0x%04x\n",
834 readw(sabi + sabi_config->header_offsets.data_segment));
835 }
836
837 /* Get a pointer to the SABI Interface */
838 ifaceP = (readw(sabi + sabi_config->header_offsets.data_segment) & 0x0ffff) << 4;
839 ifaceP += readw(sabi + sabi_config->header_offsets.data_offset) & 0x0ffff;
840 sabi_iface = ioremap_nocache(ifaceP, 16);
841 if (!sabi_iface) {
842 pr_err("Can't remap %x\n", ifaceP);
a7ea1992 843 goto error_no_signature;
2d70b73a
GKH		 844 }
845 if (debug) {
846 printk(KERN_DEBUG "ifaceP = 0x%08x\n", ifaceP);
847 printk(KERN_DEBUG "sabi_iface = %p\n", sabi_iface);
848
849 test_backlight();
850 test_wireless();
851
852 retval = sabi_get_command(sabi_config->commands.get_brightness,
853 &sretval);
854 printk(KERN_DEBUG "brightness = 0x%02x\n", sretval.retval[0]);
855 }
856
857 /* Turn on "Linux" mode in the BIOS */
858 if (sabi_config->commands.set_linux != 0xff) {
859 retval = sabi_set_command(sabi_config->commands.set_linux,
860 0x81);
861 if (retval) {
862 pr_warn("Linux mode was not set!\n");
863 goto error_no_platform;
864 }
865 }
866
ac080523
JS		 867 /* Check for stepping quirk */
868 check_for_stepping_quirk();
869
2d70b73a
GKH		 870 /* knock up a platform device to hang stuff off of */
871 sdev = platform_device_register_simple("samsung", -1, NULL, 0);
872 if (IS_ERR(sdev))
873 goto error_no_platform;
874
875 /* create a backlight device to talk to this one */
876 memset(&props, 0, sizeof(struct backlight_properties));
8713b04a 877 props.type = BACKLIGHT_PLATFORM;
bee460be
JS		 878 props.max_brightness = sabi_config->max_brightness -
879 sabi_config->min_brightness;
2d70b73a
GKH		 880 backlight_device = backlight_device_register("samsung", &sdev->dev,
881 NULL, &backlight_ops,
882 &props);
883 if (IS_ERR(backlight_device))
884 goto error_no_backlight;
885
886 backlight_device->props.brightness = read_brightness();
887 backlight_device->props.power = FB_BLANK_UNBLANK;
888 backlight_update_status(backlight_device);
889
890 retval = init_wireless(sdev);
891 if (retval)
892 goto error_no_rfk;
893
894 retval = device_create_file(&sdev->dev, &dev_attr_performance_level);
895 if (retval)
896 goto error_file_create;
897
2d70b73a
GKH		 898 return 0;
899
900error_file_create:
901 destroy_wireless();
902
903error_no_rfk:
904 backlight_device_unregister(backlight_device);
905
906error_no_backlight:
907 platform_device_unregister(sdev);
908
909error_no_platform:
910 iounmap(sabi_iface);
911
912error_no_signature:
913 iounmap(f0000_segment);
914 return -EINVAL;
915}
916
917static void __exit samsung_exit(void)
918{
919 /* Turn off "Linux" mode in the BIOS */
920 if (sabi_config->commands.set_linux != 0xff)
921 sabi_set_command(sabi_config->commands.set_linux, 0x80);
922
923 device_remove_file(&sdev->dev, &dev_attr_performance_level);
924 backlight_device_unregister(backlight_device);
925 destroy_wireless();
926 iounmap(sabi_iface);
927 iounmap(f0000_segment);
928 platform_device_unregister(sdev);
929}
930
931module_init(samsung_init);
932module_exit(samsung_exit);
933
934MODULE_AUTHOR("Greg Kroah-Hartman <gregkh@suse.de>");
935MODULE_DESCRIPTION("Samsung Backlight driver");
936MODULE_LICENSE("GPL");
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