2 * Samsung Laptop driver
4 * Copyright (C) 2009,2011 Greg Kroah-Hartman (gregkh@suse.de)
5 * Copyright (C) 2009,2011 Novell Inc.
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.
12 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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>
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 #if (defined CONFIG_ACPI_VIDEO || defined CONFIG_ACPI_VIDEO_MODULE)
30 #include <acpi/video.h>
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.
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
44 #define MAX_BRIGHT 0x07
47 #define SABI_IFACE_MAIN 0x00
48 #define SABI_IFACE_SUB 0x02
49 #define SABI_IFACE_COMPLETE 0x04
50 #define SABI_IFACE_DATA 0x05
52 #define WL_STATUS_WLAN 0x0
53 #define WL_STATUS_BT 0x2
55 /* Structure get/set data using sabi */
68 struct sabi_header_offsets {
77 struct sabi_commands {
79 * Brightness is 0 - 8, as described above.
80 * Value 0 is for the BIOS to use
87 * 0x00 - wireless is off
88 * 0x01 - wireless is on
92 * TODO, verify 3G is correct, that doesn't seem right...
94 u16 get_wireless_button;
95 u16 set_wireless_button;
97 /* 0 is off, 1 is on */
102 * 0x80 or 0x00 - no action
103 * 0x81 - recovery key pressed
105 u16 get_recovery_mode;
106 u16 set_recovery_mode;
109 * on seclinux: 0 is low, 1 is high,
110 * on swsmi: 0 is normal, 1 is silent, 2 is turbo
112 u16 get_performance_level;
113 u16 set_performance_level;
115 /* 0x80 is off, 0x81 is on */
116 u16 get_battery_life_extender;
117 u16 set_battery_life_extender;
119 /* 0x80 is off, 0x81 is on */
123 /* the first byte is for bluetooth and the third one is for wlan */
124 u16 get_wireless_status;
125 u16 set_wireless_status;
127 /* 0x81 to read, (0x82 | level << 8) to set, 0xaabb to enable */
131 * Tell the BIOS that Linux is running on this machine.
132 * 81 is on, 80 is off
137 struct sabi_performance_level {
144 const char *test_string;
146 const struct sabi_header_offsets header_offsets;
147 const struct sabi_commands commands;
148 const struct sabi_performance_level performance_levels[4];
153 static const struct sabi_config sabi_configs[] = {
155 /* I don't know if it is really 2, but it it is
156 * less than 3 anyway */
159 .test_string = "SECLINUX",
161 .main_function = 0x4c49,
169 .data_segment = 0x07,
173 .get_brightness = 0x00,
174 .set_brightness = 0x01,
176 .get_wireless_button = 0x02,
177 .set_wireless_button = 0x03,
179 .get_backlight = 0x04,
180 .set_backlight = 0x05,
182 .get_recovery_mode = 0x06,
183 .set_recovery_mode = 0x07,
185 .get_performance_level = 0x08,
186 .set_performance_level = 0x09,
188 .get_battery_life_extender = 0xFFFF,
189 .set_battery_life_extender = 0xFFFF,
191 .get_usb_charge = 0xFFFF,
192 .set_usb_charge = 0xFFFF,
194 .get_wireless_status = 0xFFFF,
195 .set_wireless_status = 0xFFFF,
197 .kbd_backlight = 0xFFFF,
202 .performance_levels = {
219 .test_string = "SwSmi@",
221 .main_function = 0x5843,
229 .data_segment = 0x07,
233 .get_brightness = 0x10,
234 .set_brightness = 0x11,
236 .get_wireless_button = 0x12,
237 .set_wireless_button = 0x13,
239 .get_backlight = 0x2d,
240 .set_backlight = 0x2e,
242 .get_recovery_mode = 0xff,
243 .set_recovery_mode = 0xff,
245 .get_performance_level = 0x31,
246 .set_performance_level = 0x32,
248 .get_battery_life_extender = 0x65,
249 .set_battery_life_extender = 0x66,
251 .get_usb_charge = 0x67,
252 .set_usb_charge = 0x68,
254 .get_wireless_status = 0x69,
255 .set_wireless_status = 0x6a,
257 .kbd_backlight = 0x78,
262 .performance_levels = {
284 * samsung-laptop/ - debugfs root directory
285 * f0000_segment - dump f0000 segment
286 * command - current command
287 * data - current data
288 * d0, d1, d2, d3 - data fields
289 * call - call SABI using command and data
291 * This allow to call arbitrary sabi commands wihout
292 * modifying the driver at all.
293 * For example, setting the keyboard backlight brightness to 5
295 * echo 0x78 > command
303 struct samsung_laptop_debug {
305 struct sabi_data data;
308 struct debugfs_blob_wrapper f0000_wrapper;
309 struct debugfs_blob_wrapper data_wrapper;
310 struct debugfs_blob_wrapper sdiag_wrapper;
313 struct samsung_laptop;
315 struct samsung_rfkill {
316 struct samsung_laptop *samsung;
317 struct rfkill *rfkill;
318 enum rfkill_type type;
321 struct samsung_laptop {
322 const struct sabi_config *config;
325 void __iomem *sabi_iface;
326 void __iomem *f0000_segment;
328 struct mutex sabi_mutex;
330 struct platform_device *platform_device;
331 struct backlight_device *backlight_device;
333 struct samsung_rfkill wlan;
334 struct samsung_rfkill bluetooth;
336 struct led_classdev kbd_led;
338 struct workqueue_struct *led_workqueue;
339 struct work_struct kbd_led_work;
341 struct samsung_laptop_debug debug;
342 struct samsung_quirks *quirks;
344 bool handle_backlight;
345 bool has_stepping_quirk;
350 struct samsung_quirks {
351 bool broken_acpi_video;
354 static struct samsung_quirks samsung_unknown = {};
356 static struct samsung_quirks samsung_broken_acpi_video = {
357 .broken_acpi_video = true,
361 module_param(force, bool, 0);
362 MODULE_PARM_DESC(force,
363 "Disable the DMI check and forces the driver to be loaded");
366 module_param(debug, bool, S_IRUGO | S_IWUSR);
367 MODULE_PARM_DESC(debug, "Debug enabled or not");
369 static int sabi_command(struct samsung_laptop *samsung, u16 command,
370 struct sabi_data *in,
371 struct sabi_data *out)
373 const struct sabi_config *config = samsung->config;
375 u16 port = readw(samsung->sabi + config->header_offsets.port);
376 u8 complete, iface_data;
378 mutex_lock(&samsung->sabi_mutex);
382 pr_info("SABI command:0x%04x "
383 "data:{0x%08x, 0x%08x, 0x%04x, 0x%02x}",
384 command, in->d0, in->d1, in->d2, in->d3);
386 pr_info("SABI command:0x%04x", command);
389 /* enable memory to be able to write to it */
390 outb(readb(samsung->sabi + config->header_offsets.en_mem), port);
392 /* write out the command */
393 writew(config->main_function, samsung->sabi_iface + SABI_IFACE_MAIN);
394 writew(command, samsung->sabi_iface + SABI_IFACE_SUB);
395 writeb(0, samsung->sabi_iface + SABI_IFACE_COMPLETE);
397 writel(in->d0, samsung->sabi_iface + SABI_IFACE_DATA);
398 writel(in->d1, samsung->sabi_iface + SABI_IFACE_DATA + 4);
399 writew(in->d2, samsung->sabi_iface + SABI_IFACE_DATA + 8);
400 writeb(in->d3, samsung->sabi_iface + SABI_IFACE_DATA + 10);
402 outb(readb(samsung->sabi + config->header_offsets.iface_func), port);
404 /* write protect memory to make it safe */
405 outb(readb(samsung->sabi + config->header_offsets.re_mem), port);
407 /* see if the command actually succeeded */
408 complete = readb(samsung->sabi_iface + SABI_IFACE_COMPLETE);
409 iface_data = readb(samsung->sabi_iface + SABI_IFACE_DATA);
411 /* iface_data = 0xFF happens when a command is not known
412 * so we only add a warning in debug mode since we will
413 * probably issue some unknown command at startup to find
414 * out which features are supported */
415 if (complete != 0xaa || (iface_data == 0xff && debug))
416 pr_warn("SABI command 0x%04x failed with"
417 " completion flag 0x%02x and interface data 0x%02x",
418 command, complete, iface_data);
420 if (complete != 0xaa || iface_data == 0xff) {
426 out->d0 = readl(samsung->sabi_iface + SABI_IFACE_DATA);
427 out->d1 = readl(samsung->sabi_iface + SABI_IFACE_DATA + 4);
428 out->d2 = readw(samsung->sabi_iface + SABI_IFACE_DATA + 2);
429 out->d3 = readb(samsung->sabi_iface + SABI_IFACE_DATA + 1);
433 pr_info("SABI return data:{0x%08x, 0x%08x, 0x%04x, 0x%02x}",
434 out->d0, out->d1, out->d2, out->d3);
438 mutex_unlock(&samsung->sabi_mutex);
442 /* simple wrappers usable with most commands */
443 static int sabi_set_commandb(struct samsung_laptop *samsung,
444 u16 command, u8 data)
446 struct sabi_data in = { { { .d0 = 0, .d1 = 0, .d2 = 0, .d3 = 0 } } };
449 return sabi_command(samsung, command, &in, NULL);
452 static int read_brightness(struct samsung_laptop *samsung)
454 const struct sabi_config *config = samsung->config;
455 const struct sabi_commands *commands = &samsung->config->commands;
456 struct sabi_data sretval;
457 int user_brightness = 0;
460 retval = sabi_command(samsung, commands->get_brightness,
465 user_brightness = sretval.data[0];
466 if (user_brightness > config->min_brightness)
467 user_brightness -= config->min_brightness;
471 return user_brightness;
474 static void set_brightness(struct samsung_laptop *samsung, u8 user_brightness)
476 const struct sabi_config *config = samsung->config;
477 const struct sabi_commands *commands = &samsung->config->commands;
478 u8 user_level = user_brightness + config->min_brightness;
480 if (samsung->has_stepping_quirk && user_level != 0) {
482 * short circuit if the specified level is what's already set
483 * to prevent the screen from flickering needlessly
485 if (user_brightness == read_brightness(samsung))
488 sabi_set_commandb(samsung, commands->set_brightness, 0);
491 sabi_set_commandb(samsung, commands->set_brightness, user_level);
494 static int get_brightness(struct backlight_device *bd)
496 struct samsung_laptop *samsung = bl_get_data(bd);
498 return read_brightness(samsung);
501 static void check_for_stepping_quirk(struct samsung_laptop *samsung)
505 int orig_level = read_brightness(samsung);
508 * Some laptops exhibit the strange behaviour of stepping toward
509 * (rather than setting) the brightness except when changing to/from
510 * brightness level 0. This behaviour is checked for here and worked
511 * around in set_brightness.
515 set_brightness(samsung, 1);
517 initial_level = read_brightness(samsung);
519 if (initial_level <= 2)
520 check_level = initial_level + 2;
522 check_level = initial_level - 2;
524 samsung->has_stepping_quirk = false;
525 set_brightness(samsung, check_level);
527 if (read_brightness(samsung) != check_level) {
528 samsung->has_stepping_quirk = true;
529 pr_info("enabled workaround for brightness stepping quirk\n");
532 set_brightness(samsung, orig_level);
535 static int update_status(struct backlight_device *bd)
537 struct samsung_laptop *samsung = bl_get_data(bd);
538 const struct sabi_commands *commands = &samsung->config->commands;
540 set_brightness(samsung, bd->props.brightness);
542 if (bd->props.power == FB_BLANK_UNBLANK)
543 sabi_set_commandb(samsung, commands->set_backlight, 1);
545 sabi_set_commandb(samsung, commands->set_backlight, 0);
550 static const struct backlight_ops backlight_ops = {
551 .get_brightness = get_brightness,
552 .update_status = update_status,
555 static int seclinux_rfkill_set(void *data, bool blocked)
557 struct samsung_rfkill *srfkill = data;
558 struct samsung_laptop *samsung = srfkill->samsung;
559 const struct sabi_commands *commands = &samsung->config->commands;
561 return sabi_set_commandb(samsung, commands->set_wireless_button,
565 static struct rfkill_ops seclinux_rfkill_ops = {
566 .set_block = seclinux_rfkill_set,
569 static int swsmi_wireless_status(struct samsung_laptop *samsung,
570 struct sabi_data *data)
572 const struct sabi_commands *commands = &samsung->config->commands;
574 return sabi_command(samsung, commands->get_wireless_status,
578 static int swsmi_rfkill_set(void *priv, bool blocked)
580 struct samsung_rfkill *srfkill = priv;
581 struct samsung_laptop *samsung = srfkill->samsung;
582 const struct sabi_commands *commands = &samsung->config->commands;
583 struct sabi_data data;
586 ret = swsmi_wireless_status(samsung, &data);
590 /* Don't set the state for non-present devices */
591 for (i = 0; i < 4; i++)
592 if (data.data[i] == 0x02)
595 if (srfkill->type == RFKILL_TYPE_WLAN)
596 data.data[WL_STATUS_WLAN] = !blocked;
597 else if (srfkill->type == RFKILL_TYPE_BLUETOOTH)
598 data.data[WL_STATUS_BT] = !blocked;
600 return sabi_command(samsung, commands->set_wireless_status,
604 static void swsmi_rfkill_query(struct rfkill *rfkill, void *priv)
606 struct samsung_rfkill *srfkill = priv;
607 struct samsung_laptop *samsung = srfkill->samsung;
608 struct sabi_data data;
611 ret = swsmi_wireless_status(samsung, &data);
615 if (srfkill->type == RFKILL_TYPE_WLAN)
616 ret = data.data[WL_STATUS_WLAN];
617 else if (srfkill->type == RFKILL_TYPE_BLUETOOTH)
618 ret = data.data[WL_STATUS_BT];
622 rfkill_set_sw_state(rfkill, !ret);
625 static struct rfkill_ops swsmi_rfkill_ops = {
626 .set_block = swsmi_rfkill_set,
627 .query = swsmi_rfkill_query,
630 static ssize_t get_performance_level(struct device *dev,
631 struct device_attribute *attr, char *buf)
633 struct samsung_laptop *samsung = dev_get_drvdata(dev);
634 const struct sabi_config *config = samsung->config;
635 const struct sabi_commands *commands = &config->commands;
636 struct sabi_data sretval;
641 retval = sabi_command(samsung, commands->get_performance_level,
646 /* The logic is backwards, yeah, lots of fun... */
647 for (i = 0; config->performance_levels[i].name; ++i) {
648 if (sretval.data[0] == config->performance_levels[i].value)
649 return sprintf(buf, "%s\n", config->performance_levels[i].name);
651 return sprintf(buf, "%s\n", "unknown");
654 static ssize_t set_performance_level(struct device *dev,
655 struct device_attribute *attr, const char *buf,
658 struct samsung_laptop *samsung = dev_get_drvdata(dev);
659 const struct sabi_config *config = samsung->config;
660 const struct sabi_commands *commands = &config->commands;
666 for (i = 0; config->performance_levels[i].name; ++i) {
667 const struct sabi_performance_level *level =
668 &config->performance_levels[i];
669 if (!strncasecmp(level->name, buf, strlen(level->name))) {
670 sabi_set_commandb(samsung,
671 commands->set_performance_level,
677 if (!config->performance_levels[i].name)
683 static DEVICE_ATTR(performance_level, S_IWUSR | S_IRUGO,
684 get_performance_level, set_performance_level);
686 static int read_battery_life_extender(struct samsung_laptop *samsung)
688 const struct sabi_commands *commands = &samsung->config->commands;
689 struct sabi_data data;
692 if (commands->get_battery_life_extender == 0xFFFF)
695 memset(&data, 0, sizeof(data));
697 retval = sabi_command(samsung, commands->get_battery_life_extender,
703 if (data.data[0] != 0 && data.data[0] != 1)
709 static int write_battery_life_extender(struct samsung_laptop *samsung,
712 const struct sabi_commands *commands = &samsung->config->commands;
713 struct sabi_data data;
715 memset(&data, 0, sizeof(data));
716 data.data[0] = 0x80 | enabled;
717 return sabi_command(samsung, commands->set_battery_life_extender,
721 static ssize_t get_battery_life_extender(struct device *dev,
722 struct device_attribute *attr,
725 struct samsung_laptop *samsung = dev_get_drvdata(dev);
728 ret = read_battery_life_extender(samsung);
732 return sprintf(buf, "%d\n", ret);
735 static ssize_t set_battery_life_extender(struct device *dev,
736 struct device_attribute *attr,
737 const char *buf, size_t count)
739 struct samsung_laptop *samsung = dev_get_drvdata(dev);
742 if (!count || sscanf(buf, "%i", &value) != 1)
745 ret = write_battery_life_extender(samsung, !!value);
752 static DEVICE_ATTR(battery_life_extender, S_IWUSR | S_IRUGO,
753 get_battery_life_extender, set_battery_life_extender);
755 static int read_usb_charge(struct samsung_laptop *samsung)
757 const struct sabi_commands *commands = &samsung->config->commands;
758 struct sabi_data data;
761 if (commands->get_usb_charge == 0xFFFF)
764 memset(&data, 0, sizeof(data));
766 retval = sabi_command(samsung, commands->get_usb_charge,
772 if (data.data[0] != 0 && data.data[0] != 1)
778 static int write_usb_charge(struct samsung_laptop *samsung,
781 const struct sabi_commands *commands = &samsung->config->commands;
782 struct sabi_data data;
784 memset(&data, 0, sizeof(data));
785 data.data[0] = 0x80 | enabled;
786 return sabi_command(samsung, commands->set_usb_charge,
790 static ssize_t get_usb_charge(struct device *dev,
791 struct device_attribute *attr,
794 struct samsung_laptop *samsung = dev_get_drvdata(dev);
797 ret = read_usb_charge(samsung);
801 return sprintf(buf, "%d\n", ret);
804 static ssize_t set_usb_charge(struct device *dev,
805 struct device_attribute *attr,
806 const char *buf, size_t count)
808 struct samsung_laptop *samsung = dev_get_drvdata(dev);
811 if (!count || sscanf(buf, "%i", &value) != 1)
814 ret = write_usb_charge(samsung, !!value);
821 static DEVICE_ATTR(usb_charge, S_IWUSR | S_IRUGO,
822 get_usb_charge, set_usb_charge);
824 static struct attribute *platform_attributes[] = {
825 &dev_attr_performance_level.attr,
826 &dev_attr_battery_life_extender.attr,
827 &dev_attr_usb_charge.attr,
831 static int find_signature(void __iomem *memcheck, const char *testStr)
836 for (loca = 0; loca < 0xffff; loca++) {
837 char temp = readb(memcheck + loca);
839 if (temp == testStr[i]) {
840 if (i == strlen(testStr)-1)
850 static void samsung_rfkill_exit(struct samsung_laptop *samsung)
852 if (samsung->wlan.rfkill) {
853 rfkill_unregister(samsung->wlan.rfkill);
854 rfkill_destroy(samsung->wlan.rfkill);
855 samsung->wlan.rfkill = NULL;
857 if (samsung->bluetooth.rfkill) {
858 rfkill_unregister(samsung->bluetooth.rfkill);
859 rfkill_destroy(samsung->bluetooth.rfkill);
860 samsung->bluetooth.rfkill = NULL;
864 static int samsung_new_rfkill(struct samsung_laptop *samsung,
865 struct samsung_rfkill *arfkill,
866 const char *name, enum rfkill_type type,
867 const struct rfkill_ops *ops,
870 struct rfkill **rfkill = &arfkill->rfkill;
873 arfkill->type = type;
874 arfkill->samsung = samsung;
876 *rfkill = rfkill_alloc(name, &samsung->platform_device->dev,
883 rfkill_init_sw_state(*rfkill, blocked);
885 ret = rfkill_register(*rfkill);
887 rfkill_destroy(*rfkill);
894 static int __init samsung_rfkill_init_seclinux(struct samsung_laptop *samsung)
896 return samsung_new_rfkill(samsung, &samsung->wlan, "samsung-wlan",
897 RFKILL_TYPE_WLAN, &seclinux_rfkill_ops, -1);
900 static int __init samsung_rfkill_init_swsmi(struct samsung_laptop *samsung)
902 struct sabi_data data;
905 ret = swsmi_wireless_status(samsung, &data);
907 /* Some swsmi laptops use the old seclinux way to control
908 * wireless devices */
910 ret = samsung_rfkill_init_seclinux(samsung);
914 /* 0x02 seems to mean that the device is no present/available */
916 if (data.data[WL_STATUS_WLAN] != 0x02)
917 ret = samsung_new_rfkill(samsung, &samsung->wlan,
921 !data.data[WL_STATUS_WLAN]);
925 if (data.data[WL_STATUS_BT] != 0x02)
926 ret = samsung_new_rfkill(samsung, &samsung->bluetooth,
928 RFKILL_TYPE_BLUETOOTH,
930 !data.data[WL_STATUS_BT]);
936 samsung_rfkill_exit(samsung);
941 static int __init samsung_rfkill_init(struct samsung_laptop *samsung)
943 if (samsung->config->sabi_version == 2)
944 return samsung_rfkill_init_seclinux(samsung);
945 if (samsung->config->sabi_version == 3)
946 return samsung_rfkill_init_swsmi(samsung);
950 static int kbd_backlight_enable(struct samsung_laptop *samsung)
952 const struct sabi_commands *commands = &samsung->config->commands;
953 struct sabi_data data;
956 if (commands->kbd_backlight == 0xFFFF)
959 memset(&data, 0, sizeof(data));
961 retval = sabi_command(samsung, commands->kbd_backlight,
967 if (data.d0 != 0xccdd)
972 static int kbd_backlight_read(struct samsung_laptop *samsung)
974 const struct sabi_commands *commands = &samsung->config->commands;
975 struct sabi_data data;
978 memset(&data, 0, sizeof(data));
980 retval = sabi_command(samsung, commands->kbd_backlight,
989 static int kbd_backlight_write(struct samsung_laptop *samsung, int brightness)
991 const struct sabi_commands *commands = &samsung->config->commands;
992 struct sabi_data data;
994 memset(&data, 0, sizeof(data));
995 data.d0 = 0x82 | ((brightness & 0xFF) << 8);
996 return sabi_command(samsung, commands->kbd_backlight,
1000 static void kbd_led_update(struct work_struct *work)
1002 struct samsung_laptop *samsung;
1004 samsung = container_of(work, struct samsung_laptop, kbd_led_work);
1005 kbd_backlight_write(samsung, samsung->kbd_led_wk);
1008 static void kbd_led_set(struct led_classdev *led_cdev,
1009 enum led_brightness value)
1011 struct samsung_laptop *samsung;
1013 samsung = container_of(led_cdev, struct samsung_laptop, kbd_led);
1015 if (value > samsung->kbd_led.max_brightness)
1016 value = samsung->kbd_led.max_brightness;
1020 samsung->kbd_led_wk = value;
1021 queue_work(samsung->led_workqueue, &samsung->kbd_led_work);
1024 static enum led_brightness kbd_led_get(struct led_classdev *led_cdev)
1026 struct samsung_laptop *samsung;
1028 samsung = container_of(led_cdev, struct samsung_laptop, kbd_led);
1029 return kbd_backlight_read(samsung);
1032 static void samsung_leds_exit(struct samsung_laptop *samsung)
1034 if (!IS_ERR_OR_NULL(samsung->kbd_led.dev))
1035 led_classdev_unregister(&samsung->kbd_led);
1036 if (samsung->led_workqueue)
1037 destroy_workqueue(samsung->led_workqueue);
1040 static int __init samsung_leds_init(struct samsung_laptop *samsung)
1044 samsung->led_workqueue = create_singlethread_workqueue("led_workqueue");
1045 if (!samsung->led_workqueue)
1048 if (kbd_backlight_enable(samsung) >= 0) {
1049 INIT_WORK(&samsung->kbd_led_work, kbd_led_update);
1051 samsung->kbd_led.name = "samsung::kbd_backlight";
1052 samsung->kbd_led.brightness_set = kbd_led_set;
1053 samsung->kbd_led.brightness_get = kbd_led_get;
1054 samsung->kbd_led.max_brightness = 8;
1056 ret = led_classdev_register(&samsung->platform_device->dev,
1061 samsung_leds_exit(samsung);
1066 static void samsung_backlight_exit(struct samsung_laptop *samsung)
1068 if (samsung->backlight_device) {
1069 backlight_device_unregister(samsung->backlight_device);
1070 samsung->backlight_device = NULL;
1074 static int __init samsung_backlight_init(struct samsung_laptop *samsung)
1076 struct backlight_device *bd;
1077 struct backlight_properties props;
1079 if (!samsung->handle_backlight)
1082 memset(&props, 0, sizeof(struct backlight_properties));
1083 props.type = BACKLIGHT_PLATFORM;
1084 props.max_brightness = samsung->config->max_brightness -
1085 samsung->config->min_brightness;
1087 bd = backlight_device_register("samsung",
1088 &samsung->platform_device->dev,
1089 samsung, &backlight_ops,
1094 samsung->backlight_device = bd;
1095 samsung->backlight_device->props.brightness = read_brightness(samsung);
1096 samsung->backlight_device->props.power = FB_BLANK_UNBLANK;
1097 backlight_update_status(samsung->backlight_device);
1102 static umode_t samsung_sysfs_is_visible(struct kobject *kobj,
1103 struct attribute *attr, int idx)
1105 struct device *dev = container_of(kobj, struct device, kobj);
1106 struct platform_device *pdev = to_platform_device(dev);
1107 struct samsung_laptop *samsung = platform_get_drvdata(pdev);
1110 if (attr == &dev_attr_performance_level.attr)
1111 ok = !!samsung->config->performance_levels[0].name;
1112 if (attr == &dev_attr_battery_life_extender.attr)
1113 ok = !!(read_battery_life_extender(samsung) >= 0);
1114 if (attr == &dev_attr_usb_charge.attr)
1115 ok = !!(read_usb_charge(samsung) >= 0);
1117 return ok ? attr->mode : 0;
1120 static struct attribute_group platform_attribute_group = {
1121 .is_visible = samsung_sysfs_is_visible,
1122 .attrs = platform_attributes
1125 static void samsung_sysfs_exit(struct samsung_laptop *samsung)
1127 struct platform_device *device = samsung->platform_device;
1129 sysfs_remove_group(&device->dev.kobj, &platform_attribute_group);
1132 static int __init samsung_sysfs_init(struct samsung_laptop *samsung)
1134 struct platform_device *device = samsung->platform_device;
1136 return sysfs_create_group(&device->dev.kobj, &platform_attribute_group);
1140 static int show_call(struct seq_file *m, void *data)
1142 struct samsung_laptop *samsung = m->private;
1143 struct sabi_data *sdata = &samsung->debug.data;
1146 seq_printf(m, "SABI 0x%04x {0x%08x, 0x%08x, 0x%04x, 0x%02x}\n",
1147 samsung->debug.command,
1148 sdata->d0, sdata->d1, sdata->d2, sdata->d3);
1150 ret = sabi_command(samsung, samsung->debug.command, sdata, sdata);
1153 seq_printf(m, "SABI command 0x%04x failed\n",
1154 samsung->debug.command);
1158 seq_printf(m, "SABI {0x%08x, 0x%08x, 0x%04x, 0x%02x}\n",
1159 sdata->d0, sdata->d1, sdata->d2, sdata->d3);
1163 static int samsung_debugfs_open(struct inode *inode, struct file *file)
1165 return single_open(file, show_call, inode->i_private);
1168 static const struct file_operations samsung_laptop_call_io_ops = {
1169 .owner = THIS_MODULE,
1170 .open = samsung_debugfs_open,
1172 .llseek = seq_lseek,
1173 .release = single_release,
1176 static void samsung_debugfs_exit(struct samsung_laptop *samsung)
1178 debugfs_remove_recursive(samsung->debug.root);
1181 static int samsung_debugfs_init(struct samsung_laptop *samsung)
1183 struct dentry *dent;
1185 samsung->debug.root = debugfs_create_dir("samsung-laptop", NULL);
1186 if (!samsung->debug.root) {
1187 pr_err("failed to create debugfs directory");
1191 samsung->debug.f0000_wrapper.data = samsung->f0000_segment;
1192 samsung->debug.f0000_wrapper.size = 0xffff;
1194 samsung->debug.data_wrapper.data = &samsung->debug.data;
1195 samsung->debug.data_wrapper.size = sizeof(samsung->debug.data);
1197 samsung->debug.sdiag_wrapper.data = samsung->sdiag;
1198 samsung->debug.sdiag_wrapper.size = strlen(samsung->sdiag);
1200 dent = debugfs_create_u16("command", S_IRUGO | S_IWUSR,
1201 samsung->debug.root, &samsung->debug.command);
1205 dent = debugfs_create_u32("d0", S_IRUGO | S_IWUSR, samsung->debug.root,
1206 &samsung->debug.data.d0);
1210 dent = debugfs_create_u32("d1", S_IRUGO | S_IWUSR, samsung->debug.root,
1211 &samsung->debug.data.d1);
1215 dent = debugfs_create_u16("d2", S_IRUGO | S_IWUSR, samsung->debug.root,
1216 &samsung->debug.data.d2);
1220 dent = debugfs_create_u8("d3", S_IRUGO | S_IWUSR, samsung->debug.root,
1221 &samsung->debug.data.d3);
1225 dent = debugfs_create_blob("data", S_IRUGO | S_IWUSR,
1226 samsung->debug.root,
1227 &samsung->debug.data_wrapper);
1231 dent = debugfs_create_blob("f0000_segment", S_IRUSR | S_IWUSR,
1232 samsung->debug.root,
1233 &samsung->debug.f0000_wrapper);
1237 dent = debugfs_create_file("call", S_IFREG | S_IRUGO,
1238 samsung->debug.root, samsung,
1239 &samsung_laptop_call_io_ops);
1243 dent = debugfs_create_blob("sdiag", S_IRUGO | S_IWUSR,
1244 samsung->debug.root,
1245 &samsung->debug.sdiag_wrapper);
1252 samsung_debugfs_exit(samsung);
1256 static void samsung_sabi_exit(struct samsung_laptop *samsung)
1258 const struct sabi_config *config = samsung->config;
1260 /* Turn off "Linux" mode in the BIOS */
1261 if (config && config->commands.set_linux != 0xff)
1262 sabi_set_commandb(samsung, config->commands.set_linux, 0x80);
1264 if (samsung->sabi_iface) {
1265 iounmap(samsung->sabi_iface);
1266 samsung->sabi_iface = NULL;
1268 if (samsung->f0000_segment) {
1269 iounmap(samsung->f0000_segment);
1270 samsung->f0000_segment = NULL;
1273 samsung->config = NULL;
1276 static __init void samsung_sabi_infos(struct samsung_laptop *samsung, int loca,
1277 unsigned int ifaceP)
1279 const struct sabi_config *config = samsung->config;
1281 printk(KERN_DEBUG "This computer supports SABI==%x\n",
1282 loca + 0xf0000 - 6);
1284 printk(KERN_DEBUG "SABI header:\n");
1285 printk(KERN_DEBUG " SMI Port Number = 0x%04x\n",
1286 readw(samsung->sabi + config->header_offsets.port));
1287 printk(KERN_DEBUG " SMI Interface Function = 0x%02x\n",
1288 readb(samsung->sabi + config->header_offsets.iface_func));
1289 printk(KERN_DEBUG " SMI enable memory buffer = 0x%02x\n",
1290 readb(samsung->sabi + config->header_offsets.en_mem));
1291 printk(KERN_DEBUG " SMI restore memory buffer = 0x%02x\n",
1292 readb(samsung->sabi + config->header_offsets.re_mem));
1293 printk(KERN_DEBUG " SABI data offset = 0x%04x\n",
1294 readw(samsung->sabi + config->header_offsets.data_offset));
1295 printk(KERN_DEBUG " SABI data segment = 0x%04x\n",
1296 readw(samsung->sabi + config->header_offsets.data_segment));
1298 printk(KERN_DEBUG " SABI pointer = 0x%08x\n", ifaceP);
1301 static void __init samsung_sabi_diag(struct samsung_laptop *samsung)
1303 int loca = find_signature(samsung->f0000_segment, "SDiaG@");
1310 * Ident: @SDiaG@686XX-N90X3A/966-SEC-07HL-S90X3A
1312 * Product name: 90X3A
1313 * BIOS Version: 07HL
1316 for (i = 0; loca < 0xffff && i < sizeof(samsung->sdiag) - 1; loca++) {
1317 char temp = readb(samsung->f0000_segment + loca);
1319 if (isalnum(temp) || temp == '/' || temp == '-')
1320 samsung->sdiag[i++] = temp;
1325 if (debug && samsung->sdiag[0])
1326 pr_info("sdiag: %s", samsung->sdiag);
1329 static int __init samsung_sabi_init(struct samsung_laptop *samsung)
1331 const struct sabi_config *config = NULL;
1332 const struct sabi_commands *commands;
1333 unsigned int ifaceP;
1338 samsung->f0000_segment = ioremap_nocache(0xf0000, 0xffff);
1339 if (!samsung->f0000_segment) {
1341 pr_err("Can't map the segment at 0xf0000\n");
1346 samsung_sabi_diag(samsung);
1348 /* Try to find one of the signatures in memory to find the header */
1349 for (i = 0; sabi_configs[i].test_string != 0; ++i) {
1350 samsung->config = &sabi_configs[i];
1351 loca = find_signature(samsung->f0000_segment,
1352 samsung->config->test_string);
1357 if (loca == 0xffff) {
1359 pr_err("This computer does not support SABI\n");
1364 config = samsung->config;
1365 commands = &config->commands;
1367 /* point to the SMI port Number */
1369 samsung->sabi = (samsung->f0000_segment + loca);
1371 /* Get a pointer to the SABI Interface */
1372 ifaceP = (readw(samsung->sabi + config->header_offsets.data_segment) & 0x0ffff) << 4;
1373 ifaceP += readw(samsung->sabi + config->header_offsets.data_offset) & 0x0ffff;
1376 samsung_sabi_infos(samsung, loca, ifaceP);
1378 samsung->sabi_iface = ioremap_nocache(ifaceP, 16);
1379 if (!samsung->sabi_iface) {
1380 pr_err("Can't remap %x\n", ifaceP);
1385 /* Turn on "Linux" mode in the BIOS */
1386 if (commands->set_linux != 0xff) {
1387 int retval = sabi_set_commandb(samsung,
1388 commands->set_linux, 0x81);
1390 pr_warn("Linux mode was not set!\n");
1396 /* Check for stepping quirk */
1397 if (samsung->handle_backlight)
1398 check_for_stepping_quirk(samsung);
1400 pr_info("detected SABI interface: %s\n",
1401 samsung->config->test_string);
1405 samsung_sabi_exit(samsung);
1410 static void samsung_platform_exit(struct samsung_laptop *samsung)
1412 if (samsung->platform_device) {
1413 platform_device_unregister(samsung->platform_device);
1414 samsung->platform_device = NULL;
1418 static int __init samsung_platform_init(struct samsung_laptop *samsung)
1420 struct platform_device *pdev;
1422 pdev = platform_device_register_simple("samsung", -1, NULL, 0);
1424 return PTR_ERR(pdev);
1426 samsung->platform_device = pdev;
1427 platform_set_drvdata(samsung->platform_device, samsung);
1431 static struct samsung_quirks *quirks;
1433 static int __init samsung_dmi_matched(const struct dmi_system_id *d)
1435 quirks = d->driver_data;
1439 static struct dmi_system_id __initdata samsung_dmi_table[] = {
1442 DMI_MATCH(DMI_SYS_VENDOR,
1443 "SAMSUNG ELECTRONICS CO., LTD."),
1444 DMI_MATCH(DMI_CHASSIS_TYPE, "8"), /* Portable */
1449 DMI_MATCH(DMI_SYS_VENDOR,
1450 "SAMSUNG ELECTRONICS CO., LTD."),
1451 DMI_MATCH(DMI_CHASSIS_TYPE, "9"), /* Laptop */
1456 DMI_MATCH(DMI_SYS_VENDOR,
1457 "SAMSUNG ELECTRONICS CO., LTD."),
1458 DMI_MATCH(DMI_CHASSIS_TYPE, "10"), /* Notebook */
1463 DMI_MATCH(DMI_SYS_VENDOR,
1464 "SAMSUNG ELECTRONICS CO., LTD."),
1465 DMI_MATCH(DMI_CHASSIS_TYPE, "14"), /* Sub-Notebook */
1468 /* Specific DMI ids for laptop with quirks */
1470 .callback = samsung_dmi_matched,
1473 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
1474 DMI_MATCH(DMI_PRODUCT_NAME, "N150P"),
1475 DMI_MATCH(DMI_BOARD_NAME, "N150P"),
1477 .driver_data = &samsung_broken_acpi_video,
1480 .callback = samsung_dmi_matched,
1481 .ident = "N145P/N250P/N260P",
1483 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
1484 DMI_MATCH(DMI_PRODUCT_NAME, "N145P/N250P/N260P"),
1485 DMI_MATCH(DMI_BOARD_NAME, "N145P/N250P/N260P"),
1487 .driver_data = &samsung_broken_acpi_video,
1490 .callback = samsung_dmi_matched,
1491 .ident = "N150/N210/N220",
1493 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
1494 DMI_MATCH(DMI_PRODUCT_NAME, "N150/N210/N220"),
1495 DMI_MATCH(DMI_BOARD_NAME, "N150/N210/N220"),
1497 .driver_data = &samsung_broken_acpi_video,
1500 .callback = samsung_dmi_matched,
1501 .ident = "NF110/NF210/NF310",
1503 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
1504 DMI_MATCH(DMI_PRODUCT_NAME, "NF110/NF210/NF310"),
1505 DMI_MATCH(DMI_BOARD_NAME, "NF110/NF210/NF310"),
1507 .driver_data = &samsung_broken_acpi_video,
1511 MODULE_DEVICE_TABLE(dmi, samsung_dmi_table);
1513 static struct platform_device *samsung_platform_device;
1515 static int __init samsung_init(void)
1517 struct samsung_laptop *samsung;
1520 quirks = &samsung_unknown;
1521 if (!force && !dmi_check_system(samsung_dmi_table))
1524 samsung = kzalloc(sizeof(*samsung), GFP_KERNEL);
1528 mutex_init(&samsung->sabi_mutex);
1529 samsung->handle_backlight = true;
1530 samsung->quirks = quirks;
1533 #if (defined CONFIG_ACPI_VIDEO || defined CONFIG_ACPI_VIDEO_MODULE)
1534 /* Don't handle backlight here if the acpi video already handle it */
1535 if (acpi_video_backlight_support()) {
1536 if (samsung->quirks->broken_acpi_video) {
1537 pr_info("Disabling ACPI video driver\n");
1538 acpi_video_unregister();
1540 samsung->handle_backlight = false;
1545 ret = samsung_platform_init(samsung);
1547 goto error_platform;
1549 ret = samsung_sabi_init(samsung);
1554 /* Only log that if we are really on a sabi platform */
1555 if (acpi_video_backlight_support() &&
1556 !samsung->quirks->broken_acpi_video)
1557 pr_info("Backlight controlled by ACPI video driver\n");
1560 ret = samsung_sysfs_init(samsung);
1564 ret = samsung_backlight_init(samsung);
1566 goto error_backlight;
1568 ret = samsung_rfkill_init(samsung);
1572 ret = samsung_leds_init(samsung);
1576 ret = samsung_debugfs_init(samsung);
1580 samsung_platform_device = samsung->platform_device;
1584 samsung_leds_exit(samsung);
1586 samsung_rfkill_exit(samsung);
1588 samsung_backlight_exit(samsung);
1590 samsung_sysfs_exit(samsung);
1592 samsung_sabi_exit(samsung);
1594 samsung_platform_exit(samsung);
1600 static void __exit samsung_exit(void)
1602 struct samsung_laptop *samsung;
1604 samsung = platform_get_drvdata(samsung_platform_device);
1606 samsung_debugfs_exit(samsung);
1607 samsung_leds_exit(samsung);
1608 samsung_rfkill_exit(samsung);
1609 samsung_backlight_exit(samsung);
1610 samsung_sysfs_exit(samsung);
1611 samsung_sabi_exit(samsung);
1612 samsung_platform_exit(samsung);
1615 samsung_platform_device = NULL;
1618 module_init(samsung_init);
1619 module_exit(samsung_exit);
1621 MODULE_AUTHOR("Greg Kroah-Hartman <gregkh@suse.de>");
1622 MODULE_DESCRIPTION("Samsung Backlight driver");
1623 MODULE_LICENSE("GPL");