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 #ifdef CONFIG_ACPI_VIDEO
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 /* DMI ids for laptops with bad Chassis Type */
1472 DMI_MATCH(DMI_SYS_VENDOR
, "SAMSUNG ELECTRONICS CO., LTD."),
1473 DMI_MATCH(DMI_PRODUCT_NAME
, "R40/R41"),
1474 DMI_MATCH(DMI_BOARD_NAME
, "R40/R41"),
1477 /* Specific DMI ids for laptop with quirks */
1479 .callback
= samsung_dmi_matched
,
1482 DMI_MATCH(DMI_SYS_VENDOR
, "SAMSUNG ELECTRONICS CO., LTD."),
1483 DMI_MATCH(DMI_PRODUCT_NAME
, "N150P"),
1484 DMI_MATCH(DMI_BOARD_NAME
, "N150P"),
1486 .driver_data
= &samsung_broken_acpi_video
,
1489 .callback
= samsung_dmi_matched
,
1490 .ident
= "N145P/N250P/N260P",
1492 DMI_MATCH(DMI_SYS_VENDOR
, "SAMSUNG ELECTRONICS CO., LTD."),
1493 DMI_MATCH(DMI_PRODUCT_NAME
, "N145P/N250P/N260P"),
1494 DMI_MATCH(DMI_BOARD_NAME
, "N145P/N250P/N260P"),
1496 .driver_data
= &samsung_broken_acpi_video
,
1499 .callback
= samsung_dmi_matched
,
1500 .ident
= "N150/N210/N220",
1502 DMI_MATCH(DMI_SYS_VENDOR
, "SAMSUNG ELECTRONICS CO., LTD."),
1503 DMI_MATCH(DMI_PRODUCT_NAME
, "N150/N210/N220"),
1504 DMI_MATCH(DMI_BOARD_NAME
, "N150/N210/N220"),
1506 .driver_data
= &samsung_broken_acpi_video
,
1509 .callback
= samsung_dmi_matched
,
1510 .ident
= "NF110/NF210/NF310",
1512 DMI_MATCH(DMI_SYS_VENDOR
, "SAMSUNG ELECTRONICS CO., LTD."),
1513 DMI_MATCH(DMI_PRODUCT_NAME
, "NF110/NF210/NF310"),
1514 DMI_MATCH(DMI_BOARD_NAME
, "NF110/NF210/NF310"),
1516 .driver_data
= &samsung_broken_acpi_video
,
1519 .callback
= samsung_dmi_matched
,
1522 DMI_MATCH(DMI_SYS_VENDOR
, "SAMSUNG ELECTRONICS CO., LTD."),
1523 DMI_MATCH(DMI_PRODUCT_NAME
, "X360"),
1524 DMI_MATCH(DMI_BOARD_NAME
, "X360"),
1526 .driver_data
= &samsung_broken_acpi_video
,
1530 MODULE_DEVICE_TABLE(dmi
, samsung_dmi_table
);
1532 static struct platform_device
*samsung_platform_device
;
1534 static int __init
samsung_init(void)
1536 struct samsung_laptop
*samsung
;
1539 quirks
= &samsung_unknown
;
1540 if (!force
&& !dmi_check_system(samsung_dmi_table
))
1543 samsung
= kzalloc(sizeof(*samsung
), GFP_KERNEL
);
1547 mutex_init(&samsung
->sabi_mutex
);
1548 samsung
->handle_backlight
= true;
1549 samsung
->quirks
= quirks
;
1553 if (samsung
->quirks
->broken_acpi_video
)
1554 acpi_video_dmi_promote_vendor();
1556 /* Don't handle backlight here if the acpi video already handle it */
1557 if (acpi_video_backlight_support()) {
1558 samsung
->handle_backlight
= false;
1559 } else if (samsung
->quirks
->broken_acpi_video
) {
1560 pr_info("Disabling ACPI video driver\n");
1561 #ifdef CONFIG_ACPI_VIDEO
1562 acpi_video_unregister();
1567 ret
= samsung_platform_init(samsung
);
1569 goto error_platform
;
1571 ret
= samsung_sabi_init(samsung
);
1576 /* Only log that if we are really on a sabi platform */
1577 if (acpi_video_backlight_support())
1578 pr_info("Backlight controlled by ACPI video driver\n");
1581 ret
= samsung_sysfs_init(samsung
);
1585 ret
= samsung_backlight_init(samsung
);
1587 goto error_backlight
;
1589 ret
= samsung_rfkill_init(samsung
);
1593 ret
= samsung_leds_init(samsung
);
1597 ret
= samsung_debugfs_init(samsung
);
1601 samsung_platform_device
= samsung
->platform_device
;
1605 samsung_leds_exit(samsung
);
1607 samsung_rfkill_exit(samsung
);
1609 samsung_backlight_exit(samsung
);
1611 samsung_sysfs_exit(samsung
);
1613 samsung_sabi_exit(samsung
);
1615 samsung_platform_exit(samsung
);
1621 static void __exit
samsung_exit(void)
1623 struct samsung_laptop
*samsung
;
1625 samsung
= platform_get_drvdata(samsung_platform_device
);
1627 samsung_debugfs_exit(samsung
);
1628 samsung_leds_exit(samsung
);
1629 samsung_rfkill_exit(samsung
);
1630 samsung_backlight_exit(samsung
);
1631 samsung_sysfs_exit(samsung
);
1632 samsung_sabi_exit(samsung
);
1633 samsung_platform_exit(samsung
);
1636 samsung_platform_device
= NULL
;
1639 module_init(samsung_init
);
1640 module_exit(samsung_exit
);
1642 MODULE_AUTHOR("Greg Kroah-Hartman <gregkh@suse.de>");
1643 MODULE_DESCRIPTION("Samsung Backlight driver");
1644 MODULE_LICENSE("GPL");