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 #include <acpi/video.h>
32 * This driver is needed because a number of Samsung laptops do not hook
33 * their control settings through ACPI. So we have to poke around in the
34 * BIOS to do things like brightness values, and "special" key controls.
38 * We have 0 - 8 as valid brightness levels. The specs say that level 0 should
39 * be reserved by the BIOS (which really doesn't make much sense), we tell
40 * userspace that the value is 0 - 7 and then just tell the hardware 1 - 8
42 #define MAX_BRIGHT 0x07
45 #define SABI_IFACE_MAIN 0x00
46 #define SABI_IFACE_SUB 0x02
47 #define SABI_IFACE_COMPLETE 0x04
48 #define SABI_IFACE_DATA 0x05
50 #define WL_STATUS_WLAN 0x0
51 #define WL_STATUS_BT 0x2
53 /* Structure get/set data using sabi */
66 struct sabi_header_offsets {
75 struct sabi_commands {
77 * Brightness is 0 - 8, as described above.
78 * Value 0 is for the BIOS to use
85 * 0x00 - wireless is off
86 * 0x01 - wireless is on
90 * TODO, verify 3G is correct, that doesn't seem right...
92 u16 get_wireless_button;
93 u16 set_wireless_button;
95 /* 0 is off, 1 is on */
100 * 0x80 or 0x00 - no action
101 * 0x81 - recovery key pressed
103 u16 get_recovery_mode;
104 u16 set_recovery_mode;
107 * on seclinux: 0 is low, 1 is high,
108 * on swsmi: 0 is normal, 1 is silent, 2 is turbo
110 u16 get_performance_level;
111 u16 set_performance_level;
113 /* 0x80 is off, 0x81 is on */
114 u16 get_battery_life_extender;
115 u16 set_battery_life_extender;
117 /* 0x80 is off, 0x81 is on */
121 /* the first byte is for bluetooth and the third one is for wlan */
122 u16 get_wireless_status;
123 u16 set_wireless_status;
125 /* 0x81 to read, (0x82 | level << 8) to set, 0xaabb to enable */
129 * Tell the BIOS that Linux is running on this machine.
130 * 81 is on, 80 is off
135 struct sabi_performance_level {
142 const char *test_string;
144 const struct sabi_header_offsets header_offsets;
145 const struct sabi_commands commands;
146 const struct sabi_performance_level performance_levels[4];
151 static const struct sabi_config sabi_configs[] = {
153 /* I don't know if it is really 2, but it it is
154 * less than 3 anyway */
157 .test_string = "SECLINUX",
159 .main_function = 0x4c49,
167 .data_segment = 0x07,
171 .get_brightness = 0x00,
172 .set_brightness = 0x01,
174 .get_wireless_button = 0x02,
175 .set_wireless_button = 0x03,
177 .get_backlight = 0x04,
178 .set_backlight = 0x05,
180 .get_recovery_mode = 0x06,
181 .set_recovery_mode = 0x07,
183 .get_performance_level = 0x08,
184 .set_performance_level = 0x09,
186 .get_battery_life_extender = 0xFFFF,
187 .set_battery_life_extender = 0xFFFF,
189 .get_usb_charge = 0xFFFF,
190 .set_usb_charge = 0xFFFF,
192 .get_wireless_status = 0xFFFF,
193 .set_wireless_status = 0xFFFF,
195 .kbd_backlight = 0xFFFF,
200 .performance_levels = {
217 .test_string = "SwSmi@",
219 .main_function = 0x5843,
227 .data_segment = 0x07,
231 .get_brightness = 0x10,
232 .set_brightness = 0x11,
234 .get_wireless_button = 0x12,
235 .set_wireless_button = 0x13,
237 .get_backlight = 0x2d,
238 .set_backlight = 0x2e,
240 .get_recovery_mode = 0xff,
241 .set_recovery_mode = 0xff,
243 .get_performance_level = 0x31,
244 .set_performance_level = 0x32,
246 .get_battery_life_extender = 0x65,
247 .set_battery_life_extender = 0x66,
249 .get_usb_charge = 0x67,
250 .set_usb_charge = 0x68,
252 .get_wireless_status = 0x69,
253 .set_wireless_status = 0x6a,
255 .kbd_backlight = 0x78,
260 .performance_levels = {
282 * samsung-laptop/ - debugfs root directory
283 * f0000_segment - dump f0000 segment
284 * command - current command
285 * data - current data
286 * d0, d1, d2, d3 - data fields
287 * call - call SABI using command and data
289 * This allow to call arbitrary sabi commands wihout
290 * modifying the driver at all.
291 * For example, setting the keyboard backlight brightness to 5
293 * echo 0x78 > command
301 struct samsung_laptop_debug {
303 struct sabi_data data;
306 struct debugfs_blob_wrapper f0000_wrapper;
307 struct debugfs_blob_wrapper data_wrapper;
308 struct debugfs_blob_wrapper sdiag_wrapper;
311 struct samsung_laptop;
313 struct samsung_rfkill {
314 struct samsung_laptop *samsung;
315 struct rfkill *rfkill;
316 enum rfkill_type type;
319 struct samsung_laptop {
320 const struct sabi_config *config;
323 void __iomem *sabi_iface;
324 void __iomem *f0000_segment;
326 struct mutex sabi_mutex;
328 struct platform_device *platform_device;
329 struct backlight_device *backlight_device;
331 struct samsung_rfkill wlan;
332 struct samsung_rfkill bluetooth;
334 struct led_classdev kbd_led;
336 struct workqueue_struct *led_workqueue;
337 struct work_struct kbd_led_work;
339 struct samsung_laptop_debug debug;
340 struct samsung_quirks *quirks;
342 bool handle_backlight;
343 bool has_stepping_quirk;
348 struct samsung_quirks {
349 bool broken_acpi_video;
352 static struct samsung_quirks samsung_unknown = {};
354 static struct samsung_quirks samsung_broken_acpi_video = {
355 .broken_acpi_video = true,
359 module_param(force, bool, 0);
360 MODULE_PARM_DESC(force,
361 "Disable the DMI check and forces the driver to be loaded");
364 module_param(debug, bool, S_IRUGO | S_IWUSR);
365 MODULE_PARM_DESC(debug, "Debug enabled or not");
367 static int sabi_command(struct samsung_laptop *samsung, u16 command,
368 struct sabi_data *in,
369 struct sabi_data *out)
371 const struct sabi_config *config = samsung->config;
373 u16 port = readw(samsung->sabi + config->header_offsets.port);
374 u8 complete, iface_data;
376 mutex_lock(&samsung->sabi_mutex);
380 pr_info("SABI command:0x%04x "
381 "data:{0x%08x, 0x%08x, 0x%04x, 0x%02x}",
382 command, in->d0, in->d1, in->d2, in->d3);
384 pr_info("SABI command:0x%04x", command);
387 /* enable memory to be able to write to it */
388 outb(readb(samsung->sabi + config->header_offsets.en_mem), port);
390 /* write out the command */
391 writew(config->main_function, samsung->sabi_iface + SABI_IFACE_MAIN);
392 writew(command, samsung->sabi_iface + SABI_IFACE_SUB);
393 writeb(0, samsung->sabi_iface + SABI_IFACE_COMPLETE);
395 writel(in->d0, samsung->sabi_iface + SABI_IFACE_DATA);
396 writel(in->d1, samsung->sabi_iface + SABI_IFACE_DATA + 4);
397 writew(in->d2, samsung->sabi_iface + SABI_IFACE_DATA + 8);
398 writeb(in->d3, samsung->sabi_iface + SABI_IFACE_DATA + 10);
400 outb(readb(samsung->sabi + config->header_offsets.iface_func), port);
402 /* write protect memory to make it safe */
403 outb(readb(samsung->sabi + config->header_offsets.re_mem), port);
405 /* see if the command actually succeeded */
406 complete = readb(samsung->sabi_iface + SABI_IFACE_COMPLETE);
407 iface_data = readb(samsung->sabi_iface + SABI_IFACE_DATA);
409 /* iface_data = 0xFF happens when a command is not known
410 * so we only add a warning in debug mode since we will
411 * probably issue some unknown command at startup to find
412 * out which features are supported */
413 if (complete != 0xaa || (iface_data == 0xff && debug))
414 pr_warn("SABI command 0x%04x failed with"
415 " completion flag 0x%02x and interface data 0x%02x",
416 command, complete, iface_data);
418 if (complete != 0xaa || iface_data == 0xff) {
424 out->d0 = readl(samsung->sabi_iface + SABI_IFACE_DATA);
425 out->d1 = readl(samsung->sabi_iface + SABI_IFACE_DATA + 4);
426 out->d2 = readw(samsung->sabi_iface + SABI_IFACE_DATA + 2);
427 out->d3 = readb(samsung->sabi_iface + SABI_IFACE_DATA + 1);
431 pr_info("SABI return data:{0x%08x, 0x%08x, 0x%04x, 0x%02x}",
432 out->d0, out->d1, out->d2, out->d3);
436 mutex_unlock(&samsung->sabi_mutex);
440 /* simple wrappers usable with most commands */
441 static int sabi_set_commandb(struct samsung_laptop *samsung,
442 u16 command, u8 data)
444 struct sabi_data in = { { { .d0 = 0, .d1 = 0, .d2 = 0, .d3 = 0 } } };
447 return sabi_command(samsung, command, &in, NULL);
450 static int read_brightness(struct samsung_laptop *samsung)
452 const struct sabi_config *config = samsung->config;
453 const struct sabi_commands *commands = &samsung->config->commands;
454 struct sabi_data sretval;
455 int user_brightness = 0;
458 retval = sabi_command(samsung, commands->get_brightness,
463 user_brightness = sretval.data[0];
464 if (user_brightness > config->min_brightness)
465 user_brightness -= config->min_brightness;
469 return user_brightness;
472 static void set_brightness(struct samsung_laptop *samsung, u8 user_brightness)
474 const struct sabi_config *config = samsung->config;
475 const struct sabi_commands *commands = &samsung->config->commands;
476 u8 user_level = user_brightness + config->min_brightness;
478 if (samsung->has_stepping_quirk && user_level != 0) {
480 * short circuit if the specified level is what's already set
481 * to prevent the screen from flickering needlessly
483 if (user_brightness == read_brightness(samsung))
486 sabi_set_commandb(samsung, commands->set_brightness, 0);
489 sabi_set_commandb(samsung, commands->set_brightness, user_level);
492 static int get_brightness(struct backlight_device *bd)
494 struct samsung_laptop *samsung = bl_get_data(bd);
496 return read_brightness(samsung);
499 static void check_for_stepping_quirk(struct samsung_laptop *samsung)
503 int orig_level = read_brightness(samsung);
506 * Some laptops exhibit the strange behaviour of stepping toward
507 * (rather than setting) the brightness except when changing to/from
508 * brightness level 0. This behaviour is checked for here and worked
509 * around in set_brightness.
513 set_brightness(samsung, 1);
515 initial_level = read_brightness(samsung);
517 if (initial_level <= 2)
518 check_level = initial_level + 2;
520 check_level = initial_level - 2;
522 samsung->has_stepping_quirk = false;
523 set_brightness(samsung, check_level);
525 if (read_brightness(samsung) != check_level) {
526 samsung->has_stepping_quirk = true;
527 pr_info("enabled workaround for brightness stepping quirk\n");
530 set_brightness(samsung, orig_level);
533 static int update_status(struct backlight_device *bd)
535 struct samsung_laptop *samsung = bl_get_data(bd);
536 const struct sabi_commands *commands = &samsung->config->commands;
538 set_brightness(samsung, bd->props.brightness);
540 if (bd->props.power == FB_BLANK_UNBLANK)
541 sabi_set_commandb(samsung, commands->set_backlight, 1);
543 sabi_set_commandb(samsung, commands->set_backlight, 0);
548 static const struct backlight_ops backlight_ops = {
549 .get_brightness = get_brightness,
550 .update_status = update_status,
553 static int seclinux_rfkill_set(void *data, bool blocked)
555 struct samsung_rfkill *srfkill = data;
556 struct samsung_laptop *samsung = srfkill->samsung;
557 const struct sabi_commands *commands = &samsung->config->commands;
559 return sabi_set_commandb(samsung, commands->set_wireless_button,
563 static struct rfkill_ops seclinux_rfkill_ops = {
564 .set_block = seclinux_rfkill_set,
567 static int swsmi_wireless_status(struct samsung_laptop *samsung,
568 struct sabi_data *data)
570 const struct sabi_commands *commands = &samsung->config->commands;
572 return sabi_command(samsung, commands->get_wireless_status,
576 static int swsmi_rfkill_set(void *priv, bool blocked)
578 struct samsung_rfkill *srfkill = priv;
579 struct samsung_laptop *samsung = srfkill->samsung;
580 const struct sabi_commands *commands = &samsung->config->commands;
581 struct sabi_data data;
584 ret = swsmi_wireless_status(samsung, &data);
588 /* Don't set the state for non-present devices */
589 for (i = 0; i < 4; i++)
590 if (data.data[i] == 0x02)
593 if (srfkill->type == RFKILL_TYPE_WLAN)
594 data.data[WL_STATUS_WLAN] = !blocked;
595 else if (srfkill->type == RFKILL_TYPE_BLUETOOTH)
596 data.data[WL_STATUS_BT] = !blocked;
598 return sabi_command(samsung, commands->set_wireless_status,
602 static void swsmi_rfkill_query(struct rfkill *rfkill, void *priv)
604 struct samsung_rfkill *srfkill = priv;
605 struct samsung_laptop *samsung = srfkill->samsung;
606 struct sabi_data data;
609 ret = swsmi_wireless_status(samsung, &data);
613 if (srfkill->type == RFKILL_TYPE_WLAN)
614 ret = data.data[WL_STATUS_WLAN];
615 else if (srfkill->type == RFKILL_TYPE_BLUETOOTH)
616 ret = data.data[WL_STATUS_BT];
620 rfkill_set_sw_state(rfkill, !ret);
623 static struct rfkill_ops swsmi_rfkill_ops = {
624 .set_block = swsmi_rfkill_set,
625 .query = swsmi_rfkill_query,
628 static ssize_t get_performance_level(struct device *dev,
629 struct device_attribute *attr, char *buf)
631 struct samsung_laptop *samsung = dev_get_drvdata(dev);
632 const struct sabi_config *config = samsung->config;
633 const struct sabi_commands *commands = &config->commands;
634 struct sabi_data sretval;
639 retval = sabi_command(samsung, commands->get_performance_level,
644 /* The logic is backwards, yeah, lots of fun... */
645 for (i = 0; config->performance_levels[i].name; ++i) {
646 if (sretval.data[0] == config->performance_levels[i].value)
647 return sprintf(buf, "%s\n", config->performance_levels[i].name);
649 return sprintf(buf, "%s\n", "unknown");
652 static ssize_t set_performance_level(struct device *dev,
653 struct device_attribute *attr, const char *buf,
656 struct samsung_laptop *samsung = dev_get_drvdata(dev);
657 const struct sabi_config *config = samsung->config;
658 const struct sabi_commands *commands = &config->commands;
664 for (i = 0; config->performance_levels[i].name; ++i) {
665 const struct sabi_performance_level *level =
666 &config->performance_levels[i];
667 if (!strncasecmp(level->name, buf, strlen(level->name))) {
668 sabi_set_commandb(samsung,
669 commands->set_performance_level,
675 if (!config->performance_levels[i].name)
681 static DEVICE_ATTR(performance_level, S_IWUSR | S_IRUGO,
682 get_performance_level, set_performance_level);
684 static int read_battery_life_extender(struct samsung_laptop *samsung)
686 const struct sabi_commands *commands = &samsung->config->commands;
687 struct sabi_data data;
690 if (commands->get_battery_life_extender == 0xFFFF)
693 memset(&data, 0, sizeof(data));
695 retval = sabi_command(samsung, commands->get_battery_life_extender,
701 if (data.data[0] != 0 && data.data[0] != 1)
707 static int write_battery_life_extender(struct samsung_laptop *samsung,
710 const struct sabi_commands *commands = &samsung->config->commands;
711 struct sabi_data data;
713 memset(&data, 0, sizeof(data));
714 data.data[0] = 0x80 | enabled;
715 return sabi_command(samsung, commands->set_battery_life_extender,
719 static ssize_t get_battery_life_extender(struct device *dev,
720 struct device_attribute *attr,
723 struct samsung_laptop *samsung = dev_get_drvdata(dev);
726 ret = read_battery_life_extender(samsung);
730 return sprintf(buf, "%d\n", ret);
733 static ssize_t set_battery_life_extender(struct device *dev,
734 struct device_attribute *attr,
735 const char *buf, size_t count)
737 struct samsung_laptop *samsung = dev_get_drvdata(dev);
740 if (!count || sscanf(buf, "%i", &value) != 1)
743 ret = write_battery_life_extender(samsung, !!value);
750 static DEVICE_ATTR(battery_life_extender, S_IWUSR | S_IRUGO,
751 get_battery_life_extender, set_battery_life_extender);
753 static int read_usb_charge(struct samsung_laptop *samsung)
755 const struct sabi_commands *commands = &samsung->config->commands;
756 struct sabi_data data;
759 if (commands->get_usb_charge == 0xFFFF)
762 memset(&data, 0, sizeof(data));
764 retval = sabi_command(samsung, commands->get_usb_charge,
770 if (data.data[0] != 0 && data.data[0] != 1)
776 static int write_usb_charge(struct samsung_laptop *samsung,
779 const struct sabi_commands *commands = &samsung->config->commands;
780 struct sabi_data data;
782 memset(&data, 0, sizeof(data));
783 data.data[0] = 0x80 | enabled;
784 return sabi_command(samsung, commands->set_usb_charge,
788 static ssize_t get_usb_charge(struct device *dev,
789 struct device_attribute *attr,
792 struct samsung_laptop *samsung = dev_get_drvdata(dev);
795 ret = read_usb_charge(samsung);
799 return sprintf(buf, "%d\n", ret);
802 static ssize_t set_usb_charge(struct device *dev,
803 struct device_attribute *attr,
804 const char *buf, size_t count)
806 struct samsung_laptop *samsung = dev_get_drvdata(dev);
809 if (!count || sscanf(buf, "%i", &value) != 1)
812 ret = write_usb_charge(samsung, !!value);
819 static DEVICE_ATTR(usb_charge, S_IWUSR | S_IRUGO,
820 get_usb_charge, set_usb_charge);
822 static struct attribute *platform_attributes[] = {
823 &dev_attr_performance_level.attr,
824 &dev_attr_battery_life_extender.attr,
825 &dev_attr_usb_charge.attr,
829 static int find_signature(void __iomem *memcheck, const char *testStr)
834 for (loca = 0; loca < 0xffff; loca++) {
835 char temp = readb(memcheck + loca);
837 if (temp == testStr[i]) {
838 if (i == strlen(testStr)-1)
848 static void samsung_rfkill_exit(struct samsung_laptop *samsung)
850 if (samsung->wlan.rfkill) {
851 rfkill_unregister(samsung->wlan.rfkill);
852 rfkill_destroy(samsung->wlan.rfkill);
853 samsung->wlan.rfkill = NULL;
855 if (samsung->bluetooth.rfkill) {
856 rfkill_unregister(samsung->bluetooth.rfkill);
857 rfkill_destroy(samsung->bluetooth.rfkill);
858 samsung->bluetooth.rfkill = NULL;
862 static int samsung_new_rfkill(struct samsung_laptop *samsung,
863 struct samsung_rfkill *arfkill,
864 const char *name, enum rfkill_type type,
865 const struct rfkill_ops *ops,
868 struct rfkill **rfkill = &arfkill->rfkill;
871 arfkill->type = type;
872 arfkill->samsung = samsung;
874 *rfkill = rfkill_alloc(name, &samsung->platform_device->dev,
881 rfkill_init_sw_state(*rfkill, blocked);
883 ret = rfkill_register(*rfkill);
885 rfkill_destroy(*rfkill);
892 static int __init samsung_rfkill_init_seclinux(struct samsung_laptop *samsung)
894 return samsung_new_rfkill(samsung, &samsung->wlan, "samsung-wlan",
895 RFKILL_TYPE_WLAN, &seclinux_rfkill_ops, -1);
898 static int __init samsung_rfkill_init_swsmi(struct samsung_laptop *samsung)
900 struct sabi_data data;
903 ret = swsmi_wireless_status(samsung, &data);
905 /* Some swsmi laptops use the old seclinux way to control
906 * wireless devices */
908 ret = samsung_rfkill_init_seclinux(samsung);
912 /* 0x02 seems to mean that the device is no present/available */
914 if (data.data[WL_STATUS_WLAN] != 0x02)
915 ret = samsung_new_rfkill(samsung, &samsung->wlan,
919 !data.data[WL_STATUS_WLAN]);
923 if (data.data[WL_STATUS_BT] != 0x02)
924 ret = samsung_new_rfkill(samsung, &samsung->bluetooth,
926 RFKILL_TYPE_BLUETOOTH,
928 !data.data[WL_STATUS_BT]);
934 samsung_rfkill_exit(samsung);
939 static int __init samsung_rfkill_init(struct samsung_laptop *samsung)
941 if (samsung->config->sabi_version == 2)
942 return samsung_rfkill_init_seclinux(samsung);
943 if (samsung->config->sabi_version == 3)
944 return samsung_rfkill_init_swsmi(samsung);
948 static int kbd_backlight_enable(struct samsung_laptop *samsung)
950 const struct sabi_commands *commands = &samsung->config->commands;
951 struct sabi_data data;
954 if (commands->kbd_backlight == 0xFFFF)
957 memset(&data, 0, sizeof(data));
959 retval = sabi_command(samsung, commands->kbd_backlight,
965 if (data.d0 != 0xccdd)
970 static int kbd_backlight_read(struct samsung_laptop *samsung)
972 const struct sabi_commands *commands = &samsung->config->commands;
973 struct sabi_data data;
976 memset(&data, 0, sizeof(data));
978 retval = sabi_command(samsung, commands->kbd_backlight,
987 static int kbd_backlight_write(struct samsung_laptop *samsung, int brightness)
989 const struct sabi_commands *commands = &samsung->config->commands;
990 struct sabi_data data;
992 memset(&data, 0, sizeof(data));
993 data.d0 = 0x82 | ((brightness & 0xFF) << 8);
994 return sabi_command(samsung, commands->kbd_backlight,
998 static void kbd_led_update(struct work_struct *work)
1000 struct samsung_laptop *samsung;
1002 samsung = container_of(work, struct samsung_laptop, kbd_led_work);
1003 kbd_backlight_write(samsung, samsung->kbd_led_wk);
1006 static void kbd_led_set(struct led_classdev *led_cdev,
1007 enum led_brightness value)
1009 struct samsung_laptop *samsung;
1011 samsung = container_of(led_cdev, struct samsung_laptop, kbd_led);
1013 if (value > samsung->kbd_led.max_brightness)
1014 value = samsung->kbd_led.max_brightness;
1018 samsung->kbd_led_wk = value;
1019 queue_work(samsung->led_workqueue, &samsung->kbd_led_work);
1022 static enum led_brightness kbd_led_get(struct led_classdev *led_cdev)
1024 struct samsung_laptop *samsung;
1026 samsung = container_of(led_cdev, struct samsung_laptop, kbd_led);
1027 return kbd_backlight_read(samsung);
1030 static void samsung_leds_exit(struct samsung_laptop *samsung)
1032 if (!IS_ERR_OR_NULL(samsung->kbd_led.dev))
1033 led_classdev_unregister(&samsung->kbd_led);
1034 if (samsung->led_workqueue)
1035 destroy_workqueue(samsung->led_workqueue);
1038 static int __init samsung_leds_init(struct samsung_laptop *samsung)
1042 samsung->led_workqueue = create_singlethread_workqueue("led_workqueue");
1043 if (!samsung->led_workqueue)
1046 if (kbd_backlight_enable(samsung) >= 0) {
1047 INIT_WORK(&samsung->kbd_led_work, kbd_led_update);
1049 samsung->kbd_led.name = "samsung::kbd_backlight";
1050 samsung->kbd_led.brightness_set = kbd_led_set;
1051 samsung->kbd_led.brightness_get = kbd_led_get;
1052 samsung->kbd_led.max_brightness = 8;
1054 ret = led_classdev_register(&samsung->platform_device->dev,
1059 samsung_leds_exit(samsung);
1064 static void samsung_backlight_exit(struct samsung_laptop *samsung)
1066 if (samsung->backlight_device) {
1067 backlight_device_unregister(samsung->backlight_device);
1068 samsung->backlight_device = NULL;
1072 static int __init samsung_backlight_init(struct samsung_laptop *samsung)
1074 struct backlight_device *bd;
1075 struct backlight_properties props;
1077 if (!samsung->handle_backlight)
1080 memset(&props, 0, sizeof(struct backlight_properties));
1081 props.type = BACKLIGHT_PLATFORM;
1082 props.max_brightness = samsung->config->max_brightness -
1083 samsung->config->min_brightness;
1085 bd = backlight_device_register("samsung",
1086 &samsung->platform_device->dev,
1087 samsung, &backlight_ops,
1092 samsung->backlight_device = bd;
1093 samsung->backlight_device->props.brightness = read_brightness(samsung);
1094 samsung->backlight_device->props.power = FB_BLANK_UNBLANK;
1095 backlight_update_status(samsung->backlight_device);
1100 static umode_t samsung_sysfs_is_visible(struct kobject *kobj,
1101 struct attribute *attr, int idx)
1103 struct device *dev = container_of(kobj, struct device, kobj);
1104 struct platform_device *pdev = to_platform_device(dev);
1105 struct samsung_laptop *samsung = platform_get_drvdata(pdev);
1108 if (attr == &dev_attr_performance_level.attr)
1109 ok = !!samsung->config->performance_levels[0].name;
1110 if (attr == &dev_attr_battery_life_extender.attr)
1111 ok = !!(read_battery_life_extender(samsung) >= 0);
1112 if (attr == &dev_attr_usb_charge.attr)
1113 ok = !!(read_usb_charge(samsung) >= 0);
1115 return ok ? attr->mode : 0;
1118 static struct attribute_group platform_attribute_group = {
1119 .is_visible = samsung_sysfs_is_visible,
1120 .attrs = platform_attributes
1123 static void samsung_sysfs_exit(struct samsung_laptop *samsung)
1125 struct platform_device *device = samsung->platform_device;
1127 sysfs_remove_group(&device->dev.kobj, &platform_attribute_group);
1130 static int __init samsung_sysfs_init(struct samsung_laptop *samsung)
1132 struct platform_device *device = samsung->platform_device;
1134 return sysfs_create_group(&device->dev.kobj, &platform_attribute_group);
1138 static int show_call(struct seq_file *m, void *data)
1140 struct samsung_laptop *samsung = m->private;
1141 struct sabi_data *sdata = &samsung->debug.data;
1144 seq_printf(m, "SABI 0x%04x {0x%08x, 0x%08x, 0x%04x, 0x%02x}\n",
1145 samsung->debug.command,
1146 sdata->d0, sdata->d1, sdata->d2, sdata->d3);
1148 ret = sabi_command(samsung, samsung->debug.command, sdata, sdata);
1151 seq_printf(m, "SABI command 0x%04x failed\n",
1152 samsung->debug.command);
1156 seq_printf(m, "SABI {0x%08x, 0x%08x, 0x%04x, 0x%02x}\n",
1157 sdata->d0, sdata->d1, sdata->d2, sdata->d3);
1161 static int samsung_debugfs_open(struct inode *inode, struct file *file)
1163 return single_open(file, show_call, inode->i_private);
1166 static const struct file_operations samsung_laptop_call_io_ops = {
1167 .owner = THIS_MODULE,
1168 .open = samsung_debugfs_open,
1170 .llseek = seq_lseek,
1171 .release = single_release,
1174 static void samsung_debugfs_exit(struct samsung_laptop *samsung)
1176 debugfs_remove_recursive(samsung->debug.root);
1179 static int samsung_debugfs_init(struct samsung_laptop *samsung)
1181 struct dentry *dent;
1183 samsung->debug.root = debugfs_create_dir("samsung-laptop", NULL);
1184 if (!samsung->debug.root) {
1185 pr_err("failed to create debugfs directory");
1189 samsung->debug.f0000_wrapper.data = samsung->f0000_segment;
1190 samsung->debug.f0000_wrapper.size = 0xffff;
1192 samsung->debug.data_wrapper.data = &samsung->debug.data;
1193 samsung->debug.data_wrapper.size = sizeof(samsung->debug.data);
1195 samsung->debug.sdiag_wrapper.data = samsung->sdiag;
1196 samsung->debug.sdiag_wrapper.size = strlen(samsung->sdiag);
1198 dent = debugfs_create_u16("command", S_IRUGO | S_IWUSR,
1199 samsung->debug.root, &samsung->debug.command);
1203 dent = debugfs_create_u32("d0", S_IRUGO | S_IWUSR, samsung->debug.root,
1204 &samsung->debug.data.d0);
1208 dent = debugfs_create_u32("d1", S_IRUGO | S_IWUSR, samsung->debug.root,
1209 &samsung->debug.data.d1);
1213 dent = debugfs_create_u16("d2", S_IRUGO | S_IWUSR, samsung->debug.root,
1214 &samsung->debug.data.d2);
1218 dent = debugfs_create_u8("d3", S_IRUGO | S_IWUSR, samsung->debug.root,
1219 &samsung->debug.data.d3);
1223 dent = debugfs_create_blob("data", S_IRUGO | S_IWUSR,
1224 samsung->debug.root,
1225 &samsung->debug.data_wrapper);
1229 dent = debugfs_create_blob("f0000_segment", S_IRUSR | S_IWUSR,
1230 samsung->debug.root,
1231 &samsung->debug.f0000_wrapper);
1235 dent = debugfs_create_file("call", S_IFREG | S_IRUGO,
1236 samsung->debug.root, samsung,
1237 &samsung_laptop_call_io_ops);
1241 dent = debugfs_create_blob("sdiag", S_IRUGO | S_IWUSR,
1242 samsung->debug.root,
1243 &samsung->debug.sdiag_wrapper);
1250 samsung_debugfs_exit(samsung);
1254 static void samsung_sabi_exit(struct samsung_laptop *samsung)
1256 const struct sabi_config *config = samsung->config;
1258 /* Turn off "Linux" mode in the BIOS */
1259 if (config && config->commands.set_linux != 0xff)
1260 sabi_set_commandb(samsung, config->commands.set_linux, 0x80);
1262 if (samsung->sabi_iface) {
1263 iounmap(samsung->sabi_iface);
1264 samsung->sabi_iface = NULL;
1266 if (samsung->f0000_segment) {
1267 iounmap(samsung->f0000_segment);
1268 samsung->f0000_segment = NULL;
1271 samsung->config = NULL;
1274 static __init void samsung_sabi_infos(struct samsung_laptop *samsung, int loca,
1275 unsigned int ifaceP)
1277 const struct sabi_config *config = samsung->config;
1279 printk(KERN_DEBUG "This computer supports SABI==%x\n",
1280 loca + 0xf0000 - 6);
1282 printk(KERN_DEBUG "SABI header:\n");
1283 printk(KERN_DEBUG " SMI Port Number = 0x%04x\n",
1284 readw(samsung->sabi + config->header_offsets.port));
1285 printk(KERN_DEBUG " SMI Interface Function = 0x%02x\n",
1286 readb(samsung->sabi + config->header_offsets.iface_func));
1287 printk(KERN_DEBUG " SMI enable memory buffer = 0x%02x\n",
1288 readb(samsung->sabi + config->header_offsets.en_mem));
1289 printk(KERN_DEBUG " SMI restore memory buffer = 0x%02x\n",
1290 readb(samsung->sabi + config->header_offsets.re_mem));
1291 printk(KERN_DEBUG " SABI data offset = 0x%04x\n",
1292 readw(samsung->sabi + config->header_offsets.data_offset));
1293 printk(KERN_DEBUG " SABI data segment = 0x%04x\n",
1294 readw(samsung->sabi + config->header_offsets.data_segment));
1296 printk(KERN_DEBUG " SABI pointer = 0x%08x\n", ifaceP);
1299 static void __init samsung_sabi_diag(struct samsung_laptop *samsung)
1301 int loca = find_signature(samsung->f0000_segment, "SDiaG@");
1308 * Ident: @SDiaG@686XX-N90X3A/966-SEC-07HL-S90X3A
1310 * Product name: 90X3A
1311 * BIOS Version: 07HL
1314 for (i = 0; loca < 0xffff && i < sizeof(samsung->sdiag) - 1; loca++) {
1315 char temp = readb(samsung->f0000_segment + loca);
1317 if (isalnum(temp) || temp == '/' || temp == '-')
1318 samsung->sdiag[i++] = temp;
1323 if (debug && samsung->sdiag[0])
1324 pr_info("sdiag: %s", samsung->sdiag);
1327 static int __init samsung_sabi_init(struct samsung_laptop *samsung)
1329 const struct sabi_config *config = NULL;
1330 const struct sabi_commands *commands;
1331 unsigned int ifaceP;
1336 samsung->f0000_segment = ioremap_nocache(0xf0000, 0xffff);
1337 if (!samsung->f0000_segment) {
1339 pr_err("Can't map the segment at 0xf0000\n");
1344 samsung_sabi_diag(samsung);
1346 /* Try to find one of the signatures in memory to find the header */
1347 for (i = 0; sabi_configs[i].test_string != 0; ++i) {
1348 samsung->config = &sabi_configs[i];
1349 loca = find_signature(samsung->f0000_segment,
1350 samsung->config->test_string);
1355 if (loca == 0xffff) {
1357 pr_err("This computer does not support SABI\n");
1362 config = samsung->config;
1363 commands = &config->commands;
1365 /* point to the SMI port Number */
1367 samsung->sabi = (samsung->f0000_segment + loca);
1369 /* Get a pointer to the SABI Interface */
1370 ifaceP = (readw(samsung->sabi + config->header_offsets.data_segment) & 0x0ffff) << 4;
1371 ifaceP += readw(samsung->sabi + config->header_offsets.data_offset) & 0x0ffff;
1374 samsung_sabi_infos(samsung, loca, ifaceP);
1376 samsung->sabi_iface = ioremap_nocache(ifaceP, 16);
1377 if (!samsung->sabi_iface) {
1378 pr_err("Can't remap %x\n", ifaceP);
1383 /* Turn on "Linux" mode in the BIOS */
1384 if (commands->set_linux != 0xff) {
1385 int retval = sabi_set_commandb(samsung,
1386 commands->set_linux, 0x81);
1388 pr_warn("Linux mode was not set!\n");
1394 /* Check for stepping quirk */
1395 if (samsung->handle_backlight)
1396 check_for_stepping_quirk(samsung);
1398 pr_info("detected SABI interface: %s\n",
1399 samsung->config->test_string);
1403 samsung_sabi_exit(samsung);
1408 static void samsung_platform_exit(struct samsung_laptop *samsung)
1410 if (samsung->platform_device) {
1411 platform_device_unregister(samsung->platform_device);
1412 samsung->platform_device = NULL;
1416 static int __init samsung_platform_init(struct samsung_laptop *samsung)
1418 struct platform_device *pdev;
1420 pdev = platform_device_register_simple("samsung", -1, NULL, 0);
1422 return PTR_ERR(pdev);
1424 samsung->platform_device = pdev;
1425 platform_set_drvdata(samsung->platform_device, samsung);
1429 static struct samsung_quirks *quirks;
1431 static int __init samsung_dmi_matched(const struct dmi_system_id *d)
1433 quirks = d->driver_data;
1437 static struct dmi_system_id __initdata samsung_dmi_table[] = {
1440 DMI_MATCH(DMI_SYS_VENDOR,
1441 "SAMSUNG ELECTRONICS CO., LTD."),
1442 DMI_MATCH(DMI_CHASSIS_TYPE, "8"), /* Portable */
1447 DMI_MATCH(DMI_SYS_VENDOR,
1448 "SAMSUNG ELECTRONICS CO., LTD."),
1449 DMI_MATCH(DMI_CHASSIS_TYPE, "9"), /* Laptop */
1454 DMI_MATCH(DMI_SYS_VENDOR,
1455 "SAMSUNG ELECTRONICS CO., LTD."),
1456 DMI_MATCH(DMI_CHASSIS_TYPE, "10"), /* Notebook */
1461 DMI_MATCH(DMI_SYS_VENDOR,
1462 "SAMSUNG ELECTRONICS CO., LTD."),
1463 DMI_MATCH(DMI_CHASSIS_TYPE, "14"), /* Sub-Notebook */
1466 /* DMI ids for laptops with bad Chassis Type */
1470 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
1471 DMI_MATCH(DMI_PRODUCT_NAME, "R40/R41"),
1472 DMI_MATCH(DMI_BOARD_NAME, "R40/R41"),
1475 /* Specific DMI ids for laptop with quirks */
1477 .callback = samsung_dmi_matched,
1480 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
1481 DMI_MATCH(DMI_PRODUCT_NAME, "N150P"),
1482 DMI_MATCH(DMI_BOARD_NAME, "N150P"),
1484 .driver_data = &samsung_broken_acpi_video,
1487 .callback = samsung_dmi_matched,
1488 .ident = "N145P/N250P/N260P",
1490 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
1491 DMI_MATCH(DMI_PRODUCT_NAME, "N145P/N250P/N260P"),
1492 DMI_MATCH(DMI_BOARD_NAME, "N145P/N250P/N260P"),
1494 .driver_data = &samsung_broken_acpi_video,
1497 .callback = samsung_dmi_matched,
1498 .ident = "N150/N210/N220",
1500 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
1501 DMI_MATCH(DMI_PRODUCT_NAME, "N150/N210/N220"),
1502 DMI_MATCH(DMI_BOARD_NAME, "N150/N210/N220"),
1504 .driver_data = &samsung_broken_acpi_video,
1507 .callback = samsung_dmi_matched,
1508 .ident = "NF110/NF210/NF310",
1510 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
1511 DMI_MATCH(DMI_PRODUCT_NAME, "NF110/NF210/NF310"),
1512 DMI_MATCH(DMI_BOARD_NAME, "NF110/NF210/NF310"),
1514 .driver_data = &samsung_broken_acpi_video,
1517 .callback = samsung_dmi_matched,
1520 DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
1521 DMI_MATCH(DMI_PRODUCT_NAME, "X360"),
1522 DMI_MATCH(DMI_BOARD_NAME, "X360"),
1524 .driver_data = &samsung_broken_acpi_video,
1528 MODULE_DEVICE_TABLE(dmi, samsung_dmi_table);
1530 static struct platform_device *samsung_platform_device;
1532 static int __init samsung_init(void)
1534 struct samsung_laptop *samsung;
1537 quirks = &samsung_unknown;
1538 if (!force && !dmi_check_system(samsung_dmi_table))
1541 samsung = kzalloc(sizeof(*samsung), GFP_KERNEL);
1545 mutex_init(&samsung->sabi_mutex);
1546 samsung->handle_backlight = true;
1547 samsung->quirks = quirks;
1551 if (samsung->quirks->broken_acpi_video)
1552 acpi_video_dmi_promote_vendor();
1554 /* Don't handle backlight here if the acpi video already handle it */
1555 if (acpi_video_backlight_support()) {
1556 samsung->handle_backlight = false;
1557 } else if (samsung->quirks->broken_acpi_video) {
1558 pr_info("Disabling ACPI video driver\n");
1559 acpi_video_unregister();
1563 ret = samsung_platform_init(samsung);
1565 goto error_platform;
1567 ret = samsung_sabi_init(samsung);
1572 /* Only log that if we are really on a sabi platform */
1573 if (acpi_video_backlight_support())
1574 pr_info("Backlight controlled by ACPI video driver\n");
1577 ret = samsung_sysfs_init(samsung);
1581 ret = samsung_backlight_init(samsung);
1583 goto error_backlight;
1585 ret = samsung_rfkill_init(samsung);
1589 ret = samsung_leds_init(samsung);
1593 ret = samsung_debugfs_init(samsung);
1597 samsung_platform_device = samsung->platform_device;
1601 samsung_leds_exit(samsung);
1603 samsung_rfkill_exit(samsung);
1605 samsung_backlight_exit(samsung);
1607 samsung_sysfs_exit(samsung);
1609 samsung_sabi_exit(samsung);
1611 samsung_platform_exit(samsung);
1617 static void __exit samsung_exit(void)
1619 struct samsung_laptop *samsung;
1621 samsung = platform_get_drvdata(samsung_platform_device);
1623 samsung_debugfs_exit(samsung);
1624 samsung_leds_exit(samsung);
1625 samsung_rfkill_exit(samsung);
1626 samsung_backlight_exit(samsung);
1627 samsung_sysfs_exit(samsung);
1628 samsung_sabi_exit(samsung);
1629 samsung_platform_exit(samsung);
1632 samsung_platform_device = NULL;
1635 module_init(samsung_init);
1636 module_exit(samsung_exit);
1638 MODULE_AUTHOR("Greg Kroah-Hartman <gregkh@suse.de>");
1639 MODULE_DESCRIPTION("Samsung Backlight driver");
1640 MODULE_LICENSE("GPL");