linux-sg2042/drivers/platform/x86/samsung-laptop.c

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/*
* Samsung Laptop driver
*
* Copyright (C) 2009,2011 Greg Kroah-Hartman (gregkh@suse.de)
* Copyright (C) 2009,2011 Novell Inc.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published by
* the Free Software Foundation.
*
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/delay.h>
#include <linux/pci.h>
#include <linux/backlight.h>
#include <linux/leds.h>
#include <linux/fb.h>
#include <linux/dmi.h>
#include <linux/platform_device.h>
#include <linux/rfkill.h>
#include <linux/acpi.h>
#include <linux/seq_file.h>
#include <linux/debugfs.h>
#include <linux/ctype.h>
#include <linux/efi.h>
#include <linux/suspend.h>
#include <acpi/video.h>
/*
* This driver is needed because a number of Samsung laptops do not hook
* their control settings through ACPI. So we have to poke around in the
* BIOS to do things like brightness values, and "special" key controls.
*/
/*
* We have 0 - 8 as valid brightness levels. The specs say that level 0 should
* be reserved by the BIOS (which really doesn't make much sense), we tell
* userspace that the value is 0 - 7 and then just tell the hardware 1 - 8
*/
#define MAX_BRIGHT 0x07
#define SABI_IFACE_MAIN 0x00
#define SABI_IFACE_SUB 0x02
#define SABI_IFACE_COMPLETE 0x04
#define SABI_IFACE_DATA 0x05
#define WL_STATUS_WLAN 0x0
#define WL_STATUS_BT 0x2
/* Structure get/set data using sabi */
struct sabi_data {
union {
struct {
u32 d0;
u32 d1;
u16 d2;
u8 d3;
};
u8 data[11];
};
};
struct sabi_header_offsets {
u8 port;
u8 re_mem;
u8 iface_func;
u8 en_mem;
u8 data_offset;
u8 data_segment;
};
struct sabi_commands {
/*
* Brightness is 0 - 8, as described above.
* Value 0 is for the BIOS to use
*/
u16 get_brightness;
u16 set_brightness;
/*
* first byte:
* 0x00 - wireless is off
* 0x01 - wireless is on
* second byte:
* 0x02 - 3G is off
* 0x03 - 3G is on
* TODO, verify 3G is correct, that doesn't seem right...
*/
u16 get_wireless_button;
u16 set_wireless_button;
/* 0 is off, 1 is on */
u16 get_backlight;
u16 set_backlight;
/*
* 0x80 or 0x00 - no action
* 0x81 - recovery key pressed
*/
u16 get_recovery_mode;
u16 set_recovery_mode;
/*
* on seclinux: 0 is low, 1 is high,
* on swsmi: 0 is normal, 1 is silent, 2 is turbo
*/
u16 get_performance_level;
u16 set_performance_level;
/* 0x80 is off, 0x81 is on */
u16 get_battery_life_extender;
u16 set_battery_life_extender;
/* 0x80 is off, 0x81 is on */
u16 get_usb_charge;
u16 set_usb_charge;
/* the first byte is for bluetooth and the third one is for wlan */
u16 get_wireless_status;
u16 set_wireless_status;
/* 0x80 is off, 0x81 is on */
u16 get_lid_handling;
u16 set_lid_handling;
/* 0x81 to read, (0x82 | level << 8) to set, 0xaabb to enable */
u16 kbd_backlight;
/*
* Tell the BIOS that Linux is running on this machine.
* 81 is on, 80 is off
*/
u16 set_linux;
};
struct sabi_performance_level {
const char *name;
u16 value;
};
struct sabi_config {
int sabi_version;
const char *test_string;
u16 main_function;
const struct sabi_header_offsets header_offsets;
const struct sabi_commands commands;
const struct sabi_performance_level performance_levels[4];
u8 min_brightness;
u8 max_brightness;
};
static const struct sabi_config sabi_configs[] = {
{
/* I don't know if it is really 2, but it it is
* less than 3 anyway */
.sabi_version = 2,
.test_string = "SECLINUX",
.main_function = 0x4c49,
.header_offsets = {
.port = 0x00,
.re_mem = 0x02,
.iface_func = 0x03,
.en_mem = 0x04,
.data_offset = 0x05,
.data_segment = 0x07,
},
.commands = {
.get_brightness = 0x00,
.set_brightness = 0x01,
.get_wireless_button = 0x02,
.set_wireless_button = 0x03,
.get_backlight = 0x04,
.set_backlight = 0x05,
.get_recovery_mode = 0x06,
.set_recovery_mode = 0x07,
.get_performance_level = 0x08,
.set_performance_level = 0x09,
.get_battery_life_extender = 0xFFFF,
.set_battery_life_extender = 0xFFFF,
.get_usb_charge = 0xFFFF,
.set_usb_charge = 0xFFFF,
.get_wireless_status = 0xFFFF,
.set_wireless_status = 0xFFFF,
.get_lid_handling = 0xFFFF,
.set_lid_handling = 0xFFFF,
.kbd_backlight = 0xFFFF,
.set_linux = 0x0a,
},
.performance_levels = {
{
.name = "silent",
.value = 0,
},
{
.name = "normal",
.value = 1,
},
{ },
},
.min_brightness = 1,
.max_brightness = 8,
},
{
.sabi_version = 3,
.test_string = "SwSmi@",
.main_function = 0x5843,
.header_offsets = {
.port = 0x00,
.re_mem = 0x04,
.iface_func = 0x02,
.en_mem = 0x03,
.data_offset = 0x05,
.data_segment = 0x07,
},
.commands = {
.get_brightness = 0x10,
.set_brightness = 0x11,
.get_wireless_button = 0x12,
.set_wireless_button = 0x13,
.get_backlight = 0x2d,
.set_backlight = 0x2e,
.get_recovery_mode = 0xff,
.set_recovery_mode = 0xff,
.get_performance_level = 0x31,
.set_performance_level = 0x32,
.get_battery_life_extender = 0x65,
.set_battery_life_extender = 0x66,
.get_usb_charge = 0x67,
.set_usb_charge = 0x68,
.get_wireless_status = 0x69,
.set_wireless_status = 0x6a,
.get_lid_handling = 0x6d,
.set_lid_handling = 0x6e,
.kbd_backlight = 0x78,
.set_linux = 0xff,
},
.performance_levels = {
{
.name = "normal",
.value = 0,
},
{
.name = "silent",
.value = 1,
},
{
.name = "overclock",
.value = 2,
},
{ },
},
.min_brightness = 0,
.max_brightness = 8,
},
{ },
};
/*
* samsung-laptop/ - debugfs root directory
* f0000_segment - dump f0000 segment
* command - current command
* data - current data
* d0, d1, d2, d3 - data fields
* call - call SABI using command and data
*
* This allow to call arbitrary sabi commands wihout
* modifying the driver at all.
* For example, setting the keyboard backlight brightness to 5
*
* echo 0x78 > command
* echo 0x0582 > d0
* echo 0 > d1
* echo 0 > d2
* echo 0 > d3
* cat call
*/
struct samsung_laptop_debug {
struct dentry *root;
struct sabi_data data;
u16 command;
struct debugfs_blob_wrapper f0000_wrapper;
struct debugfs_blob_wrapper data_wrapper;
struct debugfs_blob_wrapper sdiag_wrapper;
};
struct samsung_laptop;
struct samsung_rfkill {
struct samsung_laptop *samsung;
struct rfkill *rfkill;
enum rfkill_type type;
};
struct samsung_laptop {
const struct sabi_config *config;
void __iomem *sabi;
void __iomem *sabi_iface;
void __iomem *f0000_segment;
struct mutex sabi_mutex;
struct platform_device *platform_device;
struct backlight_device *backlight_device;
struct samsung_rfkill wlan;
struct samsung_rfkill bluetooth;
struct led_classdev kbd_led;
int kbd_led_wk;
struct workqueue_struct *led_workqueue;
struct work_struct kbd_led_work;
struct samsung_laptop_debug debug;
struct samsung_quirks *quirks;
struct notifier_block pm_nb;
bool handle_backlight;
bool has_stepping_quirk;
char sdiag[64];
};
struct samsung_quirks {
bool broken_acpi_video;
bool four_kbd_backlight_levels;
bool enable_kbd_backlight;
samsung-laptop: Add use_native_backlight quirk, and enable it on some models Since kernel 3.14 the backlight control has been broken on various Samsung Atom based netbooks. This has been bisected and this problem happens since commit b35684b8fa94 ("drm/i915: do full backlight setup at enable time") This has been reported and discussed in detail here: http://lists.freedesktop.org/archives/intel-gfx/2014-July/049395.html Unfortunately no-one has been able to fix this. This only affects Samsung Atom netbooks, and the Linux kernel and the BIOS of those laptops have never worked well together. All affected laptops already have a quirk to avoid using the standard acpi-video interface and instead use the samsung specific SABI interface which samsung-laptop uses. It seems that recent fixes to the i915 driver have also broken backlight control through the SABI interface. The intel_backlight driver OTOH works fine, and also allows for finer grained backlight control. So add a new use_native_backlight quirk, and replace the broken_acpi_video quirk with this quirk for affected models. This new quirk disables acpi-video as before and also stops samsung-laptop from registering the SABI based samsung_laptop backlight interface, leaving only the working intel_backlight interface. This commit enables this new quirk for 3 models which are known to be affected, chances are that it needs to be used on other models too. BugLink: https://bugzilla.redhat.com/show_bug.cgi?id=1094948 # N145P BugLink: https://bugzilla.redhat.com/show_bug.cgi?id=1115713 # N250P Reported-by: Bertrik Sikken <bertrik@sikken.nl> # N150P Cc: stable@vger.kernel.org # 3.16 Signed-off-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Darren Hart <dvhart@linux.intel.com>
2015-01-09 22:10:01 +08:00
bool use_native_backlight;
bool lid_handling;
};
static struct samsung_quirks samsung_unknown = {};
static struct samsung_quirks samsung_broken_acpi_video = {
.broken_acpi_video = true,
};
samsung-laptop: Add use_native_backlight quirk, and enable it on some models Since kernel 3.14 the backlight control has been broken on various Samsung Atom based netbooks. This has been bisected and this problem happens since commit b35684b8fa94 ("drm/i915: do full backlight setup at enable time") This has been reported and discussed in detail here: http://lists.freedesktop.org/archives/intel-gfx/2014-July/049395.html Unfortunately no-one has been able to fix this. This only affects Samsung Atom netbooks, and the Linux kernel and the BIOS of those laptops have never worked well together. All affected laptops already have a quirk to avoid using the standard acpi-video interface and instead use the samsung specific SABI interface which samsung-laptop uses. It seems that recent fixes to the i915 driver have also broken backlight control through the SABI interface. The intel_backlight driver OTOH works fine, and also allows for finer grained backlight control. So add a new use_native_backlight quirk, and replace the broken_acpi_video quirk with this quirk for affected models. This new quirk disables acpi-video as before and also stops samsung-laptop from registering the SABI based samsung_laptop backlight interface, leaving only the working intel_backlight interface. This commit enables this new quirk for 3 models which are known to be affected, chances are that it needs to be used on other models too. BugLink: https://bugzilla.redhat.com/show_bug.cgi?id=1094948 # N145P BugLink: https://bugzilla.redhat.com/show_bug.cgi?id=1115713 # N250P Reported-by: Bertrik Sikken <bertrik@sikken.nl> # N150P Cc: stable@vger.kernel.org # 3.16 Signed-off-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Darren Hart <dvhart@linux.intel.com>
2015-01-09 22:10:01 +08:00
static struct samsung_quirks samsung_use_native_backlight = {
.use_native_backlight = true,
};
static struct samsung_quirks samsung_np740u3e = {
.four_kbd_backlight_levels = true,
.enable_kbd_backlight = true,
};
static struct samsung_quirks samsung_lid_handling = {
.lid_handling = true,
};
static bool force;
module_param(force, bool, 0);
MODULE_PARM_DESC(force,
"Disable the DMI check and forces the driver to be loaded");
static bool debug;
module_param(debug, bool, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(debug, "Debug enabled or not");
static int sabi_command(struct samsung_laptop *samsung, u16 command,
struct sabi_data *in,
struct sabi_data *out)
{
const struct sabi_config *config = samsung->config;
int ret = 0;
u16 port = readw(samsung->sabi + config->header_offsets.port);
u8 complete, iface_data;
mutex_lock(&samsung->sabi_mutex);
if (debug) {
if (in)
pr_info("SABI command:0x%04x "
"data:{0x%08x, 0x%08x, 0x%04x, 0x%02x}",
command, in->d0, in->d1, in->d2, in->d3);
else
pr_info("SABI command:0x%04x", command);
}
/* enable memory to be able to write to it */
outb(readb(samsung->sabi + config->header_offsets.en_mem), port);
/* write out the command */
writew(config->main_function, samsung->sabi_iface + SABI_IFACE_MAIN);
writew(command, samsung->sabi_iface + SABI_IFACE_SUB);
writeb(0, samsung->sabi_iface + SABI_IFACE_COMPLETE);
if (in) {
writel(in->d0, samsung->sabi_iface + SABI_IFACE_DATA);
writel(in->d1, samsung->sabi_iface + SABI_IFACE_DATA + 4);
writew(in->d2, samsung->sabi_iface + SABI_IFACE_DATA + 8);
writeb(in->d3, samsung->sabi_iface + SABI_IFACE_DATA + 10);
}
outb(readb(samsung->sabi + config->header_offsets.iface_func), port);
/* write protect memory to make it safe */
outb(readb(samsung->sabi + config->header_offsets.re_mem), port);
/* see if the command actually succeeded */
complete = readb(samsung->sabi_iface + SABI_IFACE_COMPLETE);
iface_data = readb(samsung->sabi_iface + SABI_IFACE_DATA);
/* iface_data = 0xFF happens when a command is not known
* so we only add a warning in debug mode since we will
* probably issue some unknown command at startup to find
* out which features are supported */
if (complete != 0xaa || (iface_data == 0xff && debug))
pr_warn("SABI command 0x%04x failed with"
" completion flag 0x%02x and interface data 0x%02x",
command, complete, iface_data);
if (complete != 0xaa || iface_data == 0xff) {
ret = -EINVAL;
goto exit;
}
if (out) {
out->d0 = readl(samsung->sabi_iface + SABI_IFACE_DATA);
out->d1 = readl(samsung->sabi_iface + SABI_IFACE_DATA + 4);
out->d2 = readw(samsung->sabi_iface + SABI_IFACE_DATA + 2);
out->d3 = readb(samsung->sabi_iface + SABI_IFACE_DATA + 1);
}
if (debug && out) {
pr_info("SABI return data:{0x%08x, 0x%08x, 0x%04x, 0x%02x}",
out->d0, out->d1, out->d2, out->d3);
}
exit:
mutex_unlock(&samsung->sabi_mutex);
return ret;
}
/* simple wrappers usable with most commands */
static int sabi_set_commandb(struct samsung_laptop *samsung,
u16 command, u8 data)
{
struct sabi_data in = { { { .d0 = 0, .d1 = 0, .d2 = 0, .d3 = 0 } } };
in.data[0] = data;
return sabi_command(samsung, command, &in, NULL);
}
static int read_brightness(struct samsung_laptop *samsung)
{
const struct sabi_config *config = samsung->config;
const struct sabi_commands *commands = &samsung->config->commands;
struct sabi_data sretval;
int user_brightness = 0;
int retval;
retval = sabi_command(samsung, commands->get_brightness,
NULL, &sretval);
if (retval)
return retval;
user_brightness = sretval.data[0];
if (user_brightness > config->min_brightness)
user_brightness -= config->min_brightness;
else
user_brightness = 0;
return user_brightness;
}
static void set_brightness(struct samsung_laptop *samsung, u8 user_brightness)
{
const struct sabi_config *config = samsung->config;
const struct sabi_commands *commands = &samsung->config->commands;
u8 user_level = user_brightness + config->min_brightness;
if (samsung->has_stepping_quirk && user_level != 0) {
/*
* short circuit if the specified level is what's already set
* to prevent the screen from flickering needlessly
*/
if (user_brightness == read_brightness(samsung))
return;
sabi_set_commandb(samsung, commands->set_brightness, 0);
}
sabi_set_commandb(samsung, commands->set_brightness, user_level);
}
static int get_brightness(struct backlight_device *bd)
{
struct samsung_laptop *samsung = bl_get_data(bd);
return read_brightness(samsung);
}
static void check_for_stepping_quirk(struct samsung_laptop *samsung)
{
int initial_level;
int check_level;
int orig_level = read_brightness(samsung);
/*
* Some laptops exhibit the strange behaviour of stepping toward
* (rather than setting) the brightness except when changing to/from
* brightness level 0. This behaviour is checked for here and worked
* around in set_brightness.
*/
if (orig_level == 0)
set_brightness(samsung, 1);
initial_level = read_brightness(samsung);
if (initial_level <= 2)
check_level = initial_level + 2;
else
check_level = initial_level - 2;
samsung->has_stepping_quirk = false;
set_brightness(samsung, check_level);
if (read_brightness(samsung) != check_level) {
samsung->has_stepping_quirk = true;
pr_info("enabled workaround for brightness stepping quirk\n");
}
set_brightness(samsung, orig_level);
}
static int update_status(struct backlight_device *bd)
{
struct samsung_laptop *samsung = bl_get_data(bd);
const struct sabi_commands *commands = &samsung->config->commands;
set_brightness(samsung, bd->props.brightness);
if (bd->props.power == FB_BLANK_UNBLANK)
sabi_set_commandb(samsung, commands->set_backlight, 1);
else
sabi_set_commandb(samsung, commands->set_backlight, 0);
return 0;
}
static const struct backlight_ops backlight_ops = {
.get_brightness = get_brightness,
.update_status = update_status,
};
static int seclinux_rfkill_set(void *data, bool blocked)
{
struct samsung_rfkill *srfkill = data;
struct samsung_laptop *samsung = srfkill->samsung;
const struct sabi_commands *commands = &samsung->config->commands;
return sabi_set_commandb(samsung, commands->set_wireless_button,
!blocked);
}
static struct rfkill_ops seclinux_rfkill_ops = {
.set_block = seclinux_rfkill_set,
};
static int swsmi_wireless_status(struct samsung_laptop *samsung,
struct sabi_data *data)
{
const struct sabi_commands *commands = &samsung->config->commands;
return sabi_command(samsung, commands->get_wireless_status,
NULL, data);
}
static int swsmi_rfkill_set(void *priv, bool blocked)
{
struct samsung_rfkill *srfkill = priv;
struct samsung_laptop *samsung = srfkill->samsung;
const struct sabi_commands *commands = &samsung->config->commands;
struct sabi_data data;
int ret, i;
ret = swsmi_wireless_status(samsung, &data);
if (ret)
return ret;
/* Don't set the state for non-present devices */
for (i = 0; i < 4; i++)
if (data.data[i] == 0x02)
data.data[1] = 0;
if (srfkill->type == RFKILL_TYPE_WLAN)
data.data[WL_STATUS_WLAN] = !blocked;
else if (srfkill->type == RFKILL_TYPE_BLUETOOTH)
data.data[WL_STATUS_BT] = !blocked;
return sabi_command(samsung, commands->set_wireless_status,
&data, &data);
}
static void swsmi_rfkill_query(struct rfkill *rfkill, void *priv)
{
struct samsung_rfkill *srfkill = priv;
struct samsung_laptop *samsung = srfkill->samsung;
struct sabi_data data;
int ret;
ret = swsmi_wireless_status(samsung, &data);
if (ret)
return ;
if (srfkill->type == RFKILL_TYPE_WLAN)
ret = data.data[WL_STATUS_WLAN];
else if (srfkill->type == RFKILL_TYPE_BLUETOOTH)
ret = data.data[WL_STATUS_BT];
else
return ;
rfkill_set_sw_state(rfkill, !ret);
}
static struct rfkill_ops swsmi_rfkill_ops = {
.set_block = swsmi_rfkill_set,
.query = swsmi_rfkill_query,
};
static ssize_t get_performance_level(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct samsung_laptop *samsung = dev_get_drvdata(dev);
const struct sabi_config *config = samsung->config;
const struct sabi_commands *commands = &config->commands;
struct sabi_data sretval;
int retval;
int i;
/* Read the state */
retval = sabi_command(samsung, commands->get_performance_level,
NULL, &sretval);
if (retval)
return retval;
/* The logic is backwards, yeah, lots of fun... */
for (i = 0; config->performance_levels[i].name; ++i) {
if (sretval.data[0] == config->performance_levels[i].value)
return sprintf(buf, "%s\n", config->performance_levels[i].name);
}
return sprintf(buf, "%s\n", "unknown");
}
static ssize_t set_performance_level(struct device *dev,
struct device_attribute *attr, const char *buf,
size_t count)
{
struct samsung_laptop *samsung = dev_get_drvdata(dev);
const struct sabi_config *config = samsung->config;
const struct sabi_commands *commands = &config->commands;
int i;
if (count < 1)
return count;
for (i = 0; config->performance_levels[i].name; ++i) {
const struct sabi_performance_level *level =
&config->performance_levels[i];
if (!strncasecmp(level->name, buf, strlen(level->name))) {
sabi_set_commandb(samsung,
commands->set_performance_level,
level->value);
break;
}
}
if (!config->performance_levels[i].name)
return -EINVAL;
return count;
}
static DEVICE_ATTR(performance_level, S_IWUSR | S_IRUGO,
get_performance_level, set_performance_level);
static int read_battery_life_extender(struct samsung_laptop *samsung)
{
const struct sabi_commands *commands = &samsung->config->commands;
struct sabi_data data;
int retval;
if (commands->get_battery_life_extender == 0xFFFF)
return -ENODEV;
memset(&data, 0, sizeof(data));
data.data[0] = 0x80;
retval = sabi_command(samsung, commands->get_battery_life_extender,
&data, &data);
if (retval)
return retval;
if (data.data[0] != 0 && data.data[0] != 1)
return -ENODEV;
return data.data[0];
}
static int write_battery_life_extender(struct samsung_laptop *samsung,
int enabled)
{
const struct sabi_commands *commands = &samsung->config->commands;
struct sabi_data data;
memset(&data, 0, sizeof(data));
data.data[0] = 0x80 | enabled;
return sabi_command(samsung, commands->set_battery_life_extender,
&data, NULL);
}
static ssize_t get_battery_life_extender(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct samsung_laptop *samsung = dev_get_drvdata(dev);
int ret;
ret = read_battery_life_extender(samsung);
if (ret < 0)
return ret;
return sprintf(buf, "%d\n", ret);
}
static ssize_t set_battery_life_extender(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct samsung_laptop *samsung = dev_get_drvdata(dev);
int ret, value;
if (!count || kstrtoint(buf, 0, &value) != 0)
return -EINVAL;
ret = write_battery_life_extender(samsung, !!value);
if (ret < 0)
return ret;
return count;
}
static DEVICE_ATTR(battery_life_extender, S_IWUSR | S_IRUGO,
get_battery_life_extender, set_battery_life_extender);
static int read_usb_charge(struct samsung_laptop *samsung)
{
const struct sabi_commands *commands = &samsung->config->commands;
struct sabi_data data;
int retval;
if (commands->get_usb_charge == 0xFFFF)
return -ENODEV;
memset(&data, 0, sizeof(data));
data.data[0] = 0x80;
retval = sabi_command(samsung, commands->get_usb_charge,
&data, &data);
if (retval)
return retval;
if (data.data[0] != 0 && data.data[0] != 1)
return -ENODEV;
return data.data[0];
}
static int write_usb_charge(struct samsung_laptop *samsung,
int enabled)
{
const struct sabi_commands *commands = &samsung->config->commands;
struct sabi_data data;
memset(&data, 0, sizeof(data));
data.data[0] = 0x80 | enabled;
return sabi_command(samsung, commands->set_usb_charge,
&data, NULL);
}
static ssize_t get_usb_charge(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct samsung_laptop *samsung = dev_get_drvdata(dev);
int ret;
ret = read_usb_charge(samsung);
if (ret < 0)
return ret;
return sprintf(buf, "%d\n", ret);
}
static ssize_t set_usb_charge(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct samsung_laptop *samsung = dev_get_drvdata(dev);
int ret, value;
if (!count || kstrtoint(buf, 0, &value) != 0)
return -EINVAL;
ret = write_usb_charge(samsung, !!value);
if (ret < 0)
return ret;
return count;
}
static DEVICE_ATTR(usb_charge, S_IWUSR | S_IRUGO,
get_usb_charge, set_usb_charge);
static int read_lid_handling(struct samsung_laptop *samsung)
{
const struct sabi_commands *commands = &samsung->config->commands;
struct sabi_data data;
int retval;
if (commands->get_lid_handling == 0xFFFF)
return -ENODEV;
memset(&data, 0, sizeof(data));
retval = sabi_command(samsung, commands->get_lid_handling,
&data, &data);
if (retval)
return retval;
return data.data[0] & 0x1;
}
static int write_lid_handling(struct samsung_laptop *samsung,
int enabled)
{
const struct sabi_commands *commands = &samsung->config->commands;
struct sabi_data data;
memset(&data, 0, sizeof(data));
data.data[0] = 0x80 | enabled;
return sabi_command(samsung, commands->set_lid_handling,
&data, NULL);
}
static ssize_t get_lid_handling(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct samsung_laptop *samsung = dev_get_drvdata(dev);
int ret;
ret = read_lid_handling(samsung);
if (ret < 0)
return ret;
return sprintf(buf, "%d\n", ret);
}
static ssize_t set_lid_handling(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct samsung_laptop *samsung = dev_get_drvdata(dev);
int ret, value;
if (!count || kstrtoint(buf, 0, &value) != 0)
return -EINVAL;
ret = write_lid_handling(samsung, !!value);
if (ret < 0)
return ret;
return count;
}
static DEVICE_ATTR(lid_handling, S_IWUSR | S_IRUGO,
get_lid_handling, set_lid_handling);
static struct attribute *platform_attributes[] = {
&dev_attr_performance_level.attr,
&dev_attr_battery_life_extender.attr,
&dev_attr_usb_charge.attr,
&dev_attr_lid_handling.attr,
NULL
};
static int find_signature(void __iomem *memcheck, const char *testStr)
{
int i = 0;
int loca;
for (loca = 0; loca < 0xffff; loca++) {
char temp = readb(memcheck + loca);
if (temp == testStr[i]) {
if (i == strlen(testStr)-1)
break;
++i;
} else {
i = 0;
}
}
return loca;
}
static void samsung_rfkill_exit(struct samsung_laptop *samsung)
{
if (samsung->wlan.rfkill) {
rfkill_unregister(samsung->wlan.rfkill);
rfkill_destroy(samsung->wlan.rfkill);
samsung->wlan.rfkill = NULL;
}
if (samsung->bluetooth.rfkill) {
rfkill_unregister(samsung->bluetooth.rfkill);
rfkill_destroy(samsung->bluetooth.rfkill);
samsung->bluetooth.rfkill = NULL;
}
}
static int samsung_new_rfkill(struct samsung_laptop *samsung,
struct samsung_rfkill *arfkill,
const char *name, enum rfkill_type type,
const struct rfkill_ops *ops,
int blocked)
{
struct rfkill **rfkill = &arfkill->rfkill;
int ret;
arfkill->type = type;
arfkill->samsung = samsung;
*rfkill = rfkill_alloc(name, &samsung->platform_device->dev,
type, ops, arfkill);
if (!*rfkill)
return -EINVAL;
if (blocked != -1)
rfkill_init_sw_state(*rfkill, blocked);
ret = rfkill_register(*rfkill);
if (ret) {
rfkill_destroy(*rfkill);
*rfkill = NULL;
return ret;
}
return 0;
}
static int __init samsung_rfkill_init_seclinux(struct samsung_laptop *samsung)
{
return samsung_new_rfkill(samsung, &samsung->wlan, "samsung-wlan",
RFKILL_TYPE_WLAN, &seclinux_rfkill_ops, -1);
}
static int __init samsung_rfkill_init_swsmi(struct samsung_laptop *samsung)
{
struct sabi_data data;
int ret;
ret = swsmi_wireless_status(samsung, &data);
if (ret) {
/* Some swsmi laptops use the old seclinux way to control
* wireless devices */
if (ret == -EINVAL)
ret = samsung_rfkill_init_seclinux(samsung);
return ret;
}
/* 0x02 seems to mean that the device is no present/available */
if (data.data[WL_STATUS_WLAN] != 0x02)
ret = samsung_new_rfkill(samsung, &samsung->wlan,
"samsung-wlan",
RFKILL_TYPE_WLAN,
&swsmi_rfkill_ops,
!data.data[WL_STATUS_WLAN]);
if (ret)
goto exit;
if (data.data[WL_STATUS_BT] != 0x02)
ret = samsung_new_rfkill(samsung, &samsung->bluetooth,
"samsung-bluetooth",
RFKILL_TYPE_BLUETOOTH,
&swsmi_rfkill_ops,
!data.data[WL_STATUS_BT]);
if (ret)
goto exit;
exit:
if (ret)
samsung_rfkill_exit(samsung);
return ret;
}
static int __init samsung_rfkill_init(struct samsung_laptop *samsung)
{
if (samsung->config->sabi_version == 2)
return samsung_rfkill_init_seclinux(samsung);
if (samsung->config->sabi_version == 3)
return samsung_rfkill_init_swsmi(samsung);
return 0;
}
static void samsung_lid_handling_exit(struct samsung_laptop *samsung)
{
if (samsung->quirks->lid_handling)
write_lid_handling(samsung, 0);
}
static int __init samsung_lid_handling_init(struct samsung_laptop *samsung)
{
int retval = 0;
if (samsung->quirks->lid_handling)
retval = write_lid_handling(samsung, 1);
return retval;
}
static int kbd_backlight_enable(struct samsung_laptop *samsung)
{
const struct sabi_commands *commands = &samsung->config->commands;
struct sabi_data data;
int retval;
if (commands->kbd_backlight == 0xFFFF)
return -ENODEV;
memset(&data, 0, sizeof(data));
data.d0 = 0xaabb;
retval = sabi_command(samsung, commands->kbd_backlight,
&data, &data);
if (retval)
return retval;
if (data.d0 != 0xccdd)
return -ENODEV;
return 0;
}
static int kbd_backlight_read(struct samsung_laptop *samsung)
{
const struct sabi_commands *commands = &samsung->config->commands;
struct sabi_data data;
int retval;
memset(&data, 0, sizeof(data));
data.data[0] = 0x81;
retval = sabi_command(samsung, commands->kbd_backlight,
&data, &data);
if (retval)
return retval;
return data.data[0];
}
static int kbd_backlight_write(struct samsung_laptop *samsung, int brightness)
{
const struct sabi_commands *commands = &samsung->config->commands;
struct sabi_data data;
memset(&data, 0, sizeof(data));
data.d0 = 0x82 | ((brightness & 0xFF) << 8);
return sabi_command(samsung, commands->kbd_backlight,
&data, NULL);
}
static void kbd_led_update(struct work_struct *work)
{
struct samsung_laptop *samsung;
samsung = container_of(work, struct samsung_laptop, kbd_led_work);
kbd_backlight_write(samsung, samsung->kbd_led_wk);
}
static void kbd_led_set(struct led_classdev *led_cdev,
enum led_brightness value)
{
struct samsung_laptop *samsung;
samsung = container_of(led_cdev, struct samsung_laptop, kbd_led);
if (value > samsung->kbd_led.max_brightness)
value = samsung->kbd_led.max_brightness;
else if (value < 0)
value = 0;
samsung->kbd_led_wk = value;
queue_work(samsung->led_workqueue, &samsung->kbd_led_work);
}
static enum led_brightness kbd_led_get(struct led_classdev *led_cdev)
{
struct samsung_laptop *samsung;
samsung = container_of(led_cdev, struct samsung_laptop, kbd_led);
return kbd_backlight_read(samsung);
}
static void samsung_leds_exit(struct samsung_laptop *samsung)
{
if (!IS_ERR_OR_NULL(samsung->kbd_led.dev))
led_classdev_unregister(&samsung->kbd_led);
if (samsung->led_workqueue)
destroy_workqueue(samsung->led_workqueue);
}
static int __init samsung_leds_init(struct samsung_laptop *samsung)
{
int ret = 0;
samsung->led_workqueue = create_singlethread_workqueue("led_workqueue");
if (!samsung->led_workqueue)
return -ENOMEM;
if (kbd_backlight_enable(samsung) >= 0) {
INIT_WORK(&samsung->kbd_led_work, kbd_led_update);
samsung->kbd_led.name = "samsung::kbd_backlight";
samsung->kbd_led.brightness_set = kbd_led_set;
samsung->kbd_led.brightness_get = kbd_led_get;
samsung->kbd_led.max_brightness = 8;
if (samsung->quirks->four_kbd_backlight_levels)
samsung->kbd_led.max_brightness = 4;
ret = led_classdev_register(&samsung->platform_device->dev,
&samsung->kbd_led);
}
if (ret)
samsung_leds_exit(samsung);
return ret;
}
static void samsung_backlight_exit(struct samsung_laptop *samsung)
{
if (samsung->backlight_device) {
backlight_device_unregister(samsung->backlight_device);
samsung->backlight_device = NULL;
}
}
static int __init samsung_backlight_init(struct samsung_laptop *samsung)
{
struct backlight_device *bd;
struct backlight_properties props;
if (!samsung->handle_backlight)
return 0;
memset(&props, 0, sizeof(struct backlight_properties));
props.type = BACKLIGHT_PLATFORM;
props.max_brightness = samsung->config->max_brightness -
samsung->config->min_brightness;
bd = backlight_device_register("samsung",
&samsung->platform_device->dev,
samsung, &backlight_ops,
&props);
if (IS_ERR(bd))
return PTR_ERR(bd);
samsung->backlight_device = bd;
samsung->backlight_device->props.brightness = read_brightness(samsung);
samsung->backlight_device->props.power = FB_BLANK_UNBLANK;
backlight_update_status(samsung->backlight_device);
return 0;
}
static umode_t samsung_sysfs_is_visible(struct kobject *kobj,
struct attribute *attr, int idx)
{
struct device *dev = container_of(kobj, struct device, kobj);
struct platform_device *pdev = to_platform_device(dev);
struct samsung_laptop *samsung = platform_get_drvdata(pdev);
bool ok = true;
if (attr == &dev_attr_performance_level.attr)
ok = !!samsung->config->performance_levels[0].name;
if (attr == &dev_attr_battery_life_extender.attr)
ok = !!(read_battery_life_extender(samsung) >= 0);
if (attr == &dev_attr_usb_charge.attr)
ok = !!(read_usb_charge(samsung) >= 0);
if (attr == &dev_attr_lid_handling.attr)
ok = !!(read_lid_handling(samsung) >= 0);
return ok ? attr->mode : 0;
}
static struct attribute_group platform_attribute_group = {
.is_visible = samsung_sysfs_is_visible,
.attrs = platform_attributes
};
static void samsung_sysfs_exit(struct samsung_laptop *samsung)
{
struct platform_device *device = samsung->platform_device;
sysfs_remove_group(&device->dev.kobj, &platform_attribute_group);
}
static int __init samsung_sysfs_init(struct samsung_laptop *samsung)
{
struct platform_device *device = samsung->platform_device;
return sysfs_create_group(&device->dev.kobj, &platform_attribute_group);
}
static int show_call(struct seq_file *m, void *data)
{
struct samsung_laptop *samsung = m->private;
struct sabi_data *sdata = &samsung->debug.data;
int ret;
seq_printf(m, "SABI 0x%04x {0x%08x, 0x%08x, 0x%04x, 0x%02x}\n",
samsung->debug.command,
sdata->d0, sdata->d1, sdata->d2, sdata->d3);
ret = sabi_command(samsung, samsung->debug.command, sdata, sdata);
if (ret) {
seq_printf(m, "SABI command 0x%04x failed\n",
samsung->debug.command);
return ret;
}
seq_printf(m, "SABI {0x%08x, 0x%08x, 0x%04x, 0x%02x}\n",
sdata->d0, sdata->d1, sdata->d2, sdata->d3);
return 0;
}
static int samsung_debugfs_open(struct inode *inode, struct file *file)
{
return single_open(file, show_call, inode->i_private);
}
static const struct file_operations samsung_laptop_call_io_ops = {
.owner = THIS_MODULE,
.open = samsung_debugfs_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
static void samsung_debugfs_exit(struct samsung_laptop *samsung)
{
debugfs_remove_recursive(samsung->debug.root);
}
static int samsung_debugfs_init(struct samsung_laptop *samsung)
{
struct dentry *dent;
samsung->debug.root = debugfs_create_dir("samsung-laptop", NULL);
if (!samsung->debug.root) {
pr_err("failed to create debugfs directory");
goto error_debugfs;
}
samsung->debug.f0000_wrapper.data = samsung->f0000_segment;
samsung->debug.f0000_wrapper.size = 0xffff;
samsung->debug.data_wrapper.data = &samsung->debug.data;
samsung->debug.data_wrapper.size = sizeof(samsung->debug.data);
samsung->debug.sdiag_wrapper.data = samsung->sdiag;
samsung->debug.sdiag_wrapper.size = strlen(samsung->sdiag);
dent = debugfs_create_u16("command", S_IRUGO | S_IWUSR,
samsung->debug.root, &samsung->debug.command);
if (!dent)
goto error_debugfs;
dent = debugfs_create_u32("d0", S_IRUGO | S_IWUSR, samsung->debug.root,
&samsung->debug.data.d0);
if (!dent)
goto error_debugfs;
dent = debugfs_create_u32("d1", S_IRUGO | S_IWUSR, samsung->debug.root,
&samsung->debug.data.d1);
if (!dent)
goto error_debugfs;
dent = debugfs_create_u16("d2", S_IRUGO | S_IWUSR, samsung->debug.root,
&samsung->debug.data.d2);
if (!dent)
goto error_debugfs;
dent = debugfs_create_u8("d3", S_IRUGO | S_IWUSR, samsung->debug.root,
&samsung->debug.data.d3);
if (!dent)
goto error_debugfs;
dent = debugfs_create_blob("data", S_IRUGO | S_IWUSR,
samsung->debug.root,
&samsung->debug.data_wrapper);
if (!dent)
goto error_debugfs;
dent = debugfs_create_blob("f0000_segment", S_IRUSR | S_IWUSR,
samsung->debug.root,
&samsung->debug.f0000_wrapper);
if (!dent)
goto error_debugfs;
dent = debugfs_create_file("call", S_IFREG | S_IRUGO,
samsung->debug.root, samsung,
&samsung_laptop_call_io_ops);
if (!dent)
goto error_debugfs;
dent = debugfs_create_blob("sdiag", S_IRUGO | S_IWUSR,
samsung->debug.root,
&samsung->debug.sdiag_wrapper);
if (!dent)
goto error_debugfs;
return 0;
error_debugfs:
samsung_debugfs_exit(samsung);
return -ENOMEM;
}
static void samsung_sabi_exit(struct samsung_laptop *samsung)
{
const struct sabi_config *config = samsung->config;
/* Turn off "Linux" mode in the BIOS */
if (config && config->commands.set_linux != 0xff)
sabi_set_commandb(samsung, config->commands.set_linux, 0x80);
if (samsung->sabi_iface) {
iounmap(samsung->sabi_iface);
samsung->sabi_iface = NULL;
}
if (samsung->f0000_segment) {
iounmap(samsung->f0000_segment);
samsung->f0000_segment = NULL;
}
samsung->config = NULL;
}
static __init void samsung_sabi_infos(struct samsung_laptop *samsung, int loca,
unsigned int ifaceP)
{
const struct sabi_config *config = samsung->config;
printk(KERN_DEBUG "This computer supports SABI==%x\n",
loca + 0xf0000 - 6);
printk(KERN_DEBUG "SABI header:\n");
printk(KERN_DEBUG " SMI Port Number = 0x%04x\n",
readw(samsung->sabi + config->header_offsets.port));
printk(KERN_DEBUG " SMI Interface Function = 0x%02x\n",
readb(samsung->sabi + config->header_offsets.iface_func));
printk(KERN_DEBUG " SMI enable memory buffer = 0x%02x\n",
readb(samsung->sabi + config->header_offsets.en_mem));
printk(KERN_DEBUG " SMI restore memory buffer = 0x%02x\n",
readb(samsung->sabi + config->header_offsets.re_mem));
printk(KERN_DEBUG " SABI data offset = 0x%04x\n",
readw(samsung->sabi + config->header_offsets.data_offset));
printk(KERN_DEBUG " SABI data segment = 0x%04x\n",
readw(samsung->sabi + config->header_offsets.data_segment));
printk(KERN_DEBUG " SABI pointer = 0x%08x\n", ifaceP);
}
static void __init samsung_sabi_diag(struct samsung_laptop *samsung)
{
int loca = find_signature(samsung->f0000_segment, "SDiaG@");
int i;
if (loca == 0xffff)
return ;
/* Example:
* Ident: @SDiaG@686XX-N90X3A/966-SEC-07HL-S90X3A
*
* Product name: 90X3A
* BIOS Version: 07HL
*/
loca += 1;
for (i = 0; loca < 0xffff && i < sizeof(samsung->sdiag) - 1; loca++) {
char temp = readb(samsung->f0000_segment + loca);
if (isalnum(temp) || temp == '/' || temp == '-')
samsung->sdiag[i++] = temp;
else
break ;
}
if (debug && samsung->sdiag[0])
pr_info("sdiag: %s", samsung->sdiag);
}
static int __init samsung_sabi_init(struct samsung_laptop *samsung)
{
const struct sabi_config *config = NULL;
const struct sabi_commands *commands;
unsigned int ifaceP;
int ret = 0;
int i;
int loca;
samsung->f0000_segment = ioremap_nocache(0xf0000, 0xffff);
if (!samsung->f0000_segment) {
if (debug || force)
pr_err("Can't map the segment at 0xf0000\n");
ret = -EINVAL;
goto exit;
}
samsung_sabi_diag(samsung);
/* Try to find one of the signatures in memory to find the header */
for (i = 0; sabi_configs[i].test_string != NULL; ++i) {
samsung->config = &sabi_configs[i];
loca = find_signature(samsung->f0000_segment,
samsung->config->test_string);
if (loca != 0xffff)
break;
}
if (loca == 0xffff) {
if (debug || force)
pr_err("This computer does not support SABI\n");
ret = -ENODEV;
goto exit;
}
config = samsung->config;
commands = &config->commands;
/* point to the SMI port Number */
loca += 1;
samsung->sabi = (samsung->f0000_segment + loca);
/* Get a pointer to the SABI Interface */
ifaceP = (readw(samsung->sabi + config->header_offsets.data_segment) & 0x0ffff) << 4;
ifaceP += readw(samsung->sabi + config->header_offsets.data_offset) & 0x0ffff;
if (debug)
samsung_sabi_infos(samsung, loca, ifaceP);
samsung->sabi_iface = ioremap_nocache(ifaceP, 16);
if (!samsung->sabi_iface) {
pr_err("Can't remap %x\n", ifaceP);
ret = -EINVAL;
goto exit;
}
/* Turn on "Linux" mode in the BIOS */
if (commands->set_linux != 0xff) {
int retval = sabi_set_commandb(samsung,
commands->set_linux, 0x81);
if (retval) {
pr_warn("Linux mode was not set!\n");
ret = -ENODEV;
goto exit;
}
}
/* Check for stepping quirk */
if (samsung->handle_backlight)
check_for_stepping_quirk(samsung);
pr_info("detected SABI interface: %s\n",
samsung->config->test_string);
exit:
if (ret)
samsung_sabi_exit(samsung);
return ret;
}
static void samsung_platform_exit(struct samsung_laptop *samsung)
{
if (samsung->platform_device) {
platform_device_unregister(samsung->platform_device);
samsung->platform_device = NULL;
}
}
static int samsung_pm_notification(struct notifier_block *nb,
unsigned long val, void *ptr)
{
struct samsung_laptop *samsung;
samsung = container_of(nb, struct samsung_laptop, pm_nb);
if (val == PM_POST_HIBERNATION &&
samsung->quirks->enable_kbd_backlight)
kbd_backlight_enable(samsung);
if (val == PM_POST_HIBERNATION && samsung->quirks->lid_handling)
write_lid_handling(samsung, 1);
return 0;
}
static int __init samsung_platform_init(struct samsung_laptop *samsung)
{
struct platform_device *pdev;
pdev = platform_device_register_simple("samsung", -1, NULL, 0);
if (IS_ERR(pdev))
return PTR_ERR(pdev);
samsung->platform_device = pdev;
platform_set_drvdata(samsung->platform_device, samsung);
return 0;
}
static struct samsung_quirks *quirks;
static int __init samsung_dmi_matched(const struct dmi_system_id *d)
{
quirks = d->driver_data;
return 0;
}
static struct dmi_system_id __initdata samsung_dmi_table[] = {
{
.matches = {
DMI_MATCH(DMI_SYS_VENDOR,
"SAMSUNG ELECTRONICS CO., LTD."),
DMI_MATCH(DMI_CHASSIS_TYPE, "8"), /* Portable */
},
},
{
.matches = {
DMI_MATCH(DMI_SYS_VENDOR,
"SAMSUNG ELECTRONICS CO., LTD."),
DMI_MATCH(DMI_CHASSIS_TYPE, "9"), /* Laptop */
},
},
{
.matches = {
DMI_MATCH(DMI_SYS_VENDOR,
"SAMSUNG ELECTRONICS CO., LTD."),
DMI_MATCH(DMI_CHASSIS_TYPE, "10"), /* Notebook */
},
},
{
.matches = {
DMI_MATCH(DMI_SYS_VENDOR,
"SAMSUNG ELECTRONICS CO., LTD."),
DMI_MATCH(DMI_CHASSIS_TYPE, "14"), /* Sub-Notebook */
},
},
/* DMI ids for laptops with bad Chassis Type */
{
.ident = "R40/R41",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
DMI_MATCH(DMI_PRODUCT_NAME, "R40/R41"),
DMI_MATCH(DMI_BOARD_NAME, "R40/R41"),
},
},
/* Specific DMI ids for laptop with quirks */
{
.callback = samsung_dmi_matched,
.ident = "N150P",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
DMI_MATCH(DMI_PRODUCT_NAME, "N150P"),
DMI_MATCH(DMI_BOARD_NAME, "N150P"),
},
samsung-laptop: Add use_native_backlight quirk, and enable it on some models Since kernel 3.14 the backlight control has been broken on various Samsung Atom based netbooks. This has been bisected and this problem happens since commit b35684b8fa94 ("drm/i915: do full backlight setup at enable time") This has been reported and discussed in detail here: http://lists.freedesktop.org/archives/intel-gfx/2014-July/049395.html Unfortunately no-one has been able to fix this. This only affects Samsung Atom netbooks, and the Linux kernel and the BIOS of those laptops have never worked well together. All affected laptops already have a quirk to avoid using the standard acpi-video interface and instead use the samsung specific SABI interface which samsung-laptop uses. It seems that recent fixes to the i915 driver have also broken backlight control through the SABI interface. The intel_backlight driver OTOH works fine, and also allows for finer grained backlight control. So add a new use_native_backlight quirk, and replace the broken_acpi_video quirk with this quirk for affected models. This new quirk disables acpi-video as before and also stops samsung-laptop from registering the SABI based samsung_laptop backlight interface, leaving only the working intel_backlight interface. This commit enables this new quirk for 3 models which are known to be affected, chances are that it needs to be used on other models too. BugLink: https://bugzilla.redhat.com/show_bug.cgi?id=1094948 # N145P BugLink: https://bugzilla.redhat.com/show_bug.cgi?id=1115713 # N250P Reported-by: Bertrik Sikken <bertrik@sikken.nl> # N150P Cc: stable@vger.kernel.org # 3.16 Signed-off-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Darren Hart <dvhart@linux.intel.com>
2015-01-09 22:10:01 +08:00
.driver_data = &samsung_use_native_backlight,
},
{
.callback = samsung_dmi_matched,
.ident = "N145P/N250P/N260P",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
DMI_MATCH(DMI_PRODUCT_NAME, "N145P/N250P/N260P"),
DMI_MATCH(DMI_BOARD_NAME, "N145P/N250P/N260P"),
},
samsung-laptop: Add use_native_backlight quirk, and enable it on some models Since kernel 3.14 the backlight control has been broken on various Samsung Atom based netbooks. This has been bisected and this problem happens since commit b35684b8fa94 ("drm/i915: do full backlight setup at enable time") This has been reported and discussed in detail here: http://lists.freedesktop.org/archives/intel-gfx/2014-July/049395.html Unfortunately no-one has been able to fix this. This only affects Samsung Atom netbooks, and the Linux kernel and the BIOS of those laptops have never worked well together. All affected laptops already have a quirk to avoid using the standard acpi-video interface and instead use the samsung specific SABI interface which samsung-laptop uses. It seems that recent fixes to the i915 driver have also broken backlight control through the SABI interface. The intel_backlight driver OTOH works fine, and also allows for finer grained backlight control. So add a new use_native_backlight quirk, and replace the broken_acpi_video quirk with this quirk for affected models. This new quirk disables acpi-video as before and also stops samsung-laptop from registering the SABI based samsung_laptop backlight interface, leaving only the working intel_backlight interface. This commit enables this new quirk for 3 models which are known to be affected, chances are that it needs to be used on other models too. BugLink: https://bugzilla.redhat.com/show_bug.cgi?id=1094948 # N145P BugLink: https://bugzilla.redhat.com/show_bug.cgi?id=1115713 # N250P Reported-by: Bertrik Sikken <bertrik@sikken.nl> # N150P Cc: stable@vger.kernel.org # 3.16 Signed-off-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Darren Hart <dvhart@linux.intel.com>
2015-01-09 22:10:01 +08:00
.driver_data = &samsung_use_native_backlight,
},
{
.callback = samsung_dmi_matched,
.ident = "N150/N210/N220",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
DMI_MATCH(DMI_PRODUCT_NAME, "N150/N210/N220"),
DMI_MATCH(DMI_BOARD_NAME, "N150/N210/N220"),
},
.driver_data = &samsung_broken_acpi_video,
},
{
.callback = samsung_dmi_matched,
.ident = "NF110/NF210/NF310",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
DMI_MATCH(DMI_PRODUCT_NAME, "NF110/NF210/NF310"),
DMI_MATCH(DMI_BOARD_NAME, "NF110/NF210/NF310"),
},
.driver_data = &samsung_broken_acpi_video,
},
{
.callback = samsung_dmi_matched,
.ident = "X360",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
DMI_MATCH(DMI_PRODUCT_NAME, "X360"),
DMI_MATCH(DMI_BOARD_NAME, "X360"),
},
.driver_data = &samsung_broken_acpi_video,
},
{
.callback = samsung_dmi_matched,
.ident = "N250P",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
DMI_MATCH(DMI_PRODUCT_NAME, "N250P"),
DMI_MATCH(DMI_BOARD_NAME, "N250P"),
},
samsung-laptop: Add use_native_backlight quirk, and enable it on some models Since kernel 3.14 the backlight control has been broken on various Samsung Atom based netbooks. This has been bisected and this problem happens since commit b35684b8fa94 ("drm/i915: do full backlight setup at enable time") This has been reported and discussed in detail here: http://lists.freedesktop.org/archives/intel-gfx/2014-July/049395.html Unfortunately no-one has been able to fix this. This only affects Samsung Atom netbooks, and the Linux kernel and the BIOS of those laptops have never worked well together. All affected laptops already have a quirk to avoid using the standard acpi-video interface and instead use the samsung specific SABI interface which samsung-laptop uses. It seems that recent fixes to the i915 driver have also broken backlight control through the SABI interface. The intel_backlight driver OTOH works fine, and also allows for finer grained backlight control. So add a new use_native_backlight quirk, and replace the broken_acpi_video quirk with this quirk for affected models. This new quirk disables acpi-video as before and also stops samsung-laptop from registering the SABI based samsung_laptop backlight interface, leaving only the working intel_backlight interface. This commit enables this new quirk for 3 models which are known to be affected, chances are that it needs to be used on other models too. BugLink: https://bugzilla.redhat.com/show_bug.cgi?id=1094948 # N145P BugLink: https://bugzilla.redhat.com/show_bug.cgi?id=1115713 # N250P Reported-by: Bertrik Sikken <bertrik@sikken.nl> # N150P Cc: stable@vger.kernel.org # 3.16 Signed-off-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Darren Hart <dvhart@linux.intel.com>
2015-01-09 22:10:01 +08:00
.driver_data = &samsung_use_native_backlight,
},
{
.callback = samsung_dmi_matched,
.ident = "NC210",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
DMI_MATCH(DMI_PRODUCT_NAME, "NC210/NC110"),
DMI_MATCH(DMI_BOARD_NAME, "NC210/NC110"),
},
.driver_data = &samsung_broken_acpi_video,
},
{
.callback = samsung_dmi_matched,
.ident = "730U3E/740U3E",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
DMI_MATCH(DMI_PRODUCT_NAME, "730U3E/740U3E"),
},
.driver_data = &samsung_np740u3e,
},
{
.callback = samsung_dmi_matched,
.ident = "300V3Z/300V4Z/300V5Z",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
DMI_MATCH(DMI_PRODUCT_NAME, "300V3Z/300V4Z/300V5Z"),
},
.driver_data = &samsung_lid_handling,
},
{ },
};
MODULE_DEVICE_TABLE(dmi, samsung_dmi_table);
static struct platform_device *samsung_platform_device;
static int __init samsung_init(void)
{
struct samsung_laptop *samsung;
int ret;
if (efi_enabled(EFI_BOOT))
return -ENODEV;
quirks = &samsung_unknown;
if (!force && !dmi_check_system(samsung_dmi_table))
return -ENODEV;
samsung = kzalloc(sizeof(*samsung), GFP_KERNEL);
if (!samsung)
return -ENOMEM;
mutex_init(&samsung->sabi_mutex);
samsung->handle_backlight = true;
samsung->quirks = quirks;
#ifdef CONFIG_ACPI
if (samsung->quirks->broken_acpi_video)
acpi_video_set_dmi_backlight_type(acpi_backlight_vendor);
if (samsung->quirks->use_native_backlight)
acpi_video_set_dmi_backlight_type(acpi_backlight_native);
samsung-laptop: Add use_native_backlight quirk, and enable it on some models Since kernel 3.14 the backlight control has been broken on various Samsung Atom based netbooks. This has been bisected and this problem happens since commit b35684b8fa94 ("drm/i915: do full backlight setup at enable time") This has been reported and discussed in detail here: http://lists.freedesktop.org/archives/intel-gfx/2014-July/049395.html Unfortunately no-one has been able to fix this. This only affects Samsung Atom netbooks, and the Linux kernel and the BIOS of those laptops have never worked well together. All affected laptops already have a quirk to avoid using the standard acpi-video interface and instead use the samsung specific SABI interface which samsung-laptop uses. It seems that recent fixes to the i915 driver have also broken backlight control through the SABI interface. The intel_backlight driver OTOH works fine, and also allows for finer grained backlight control. So add a new use_native_backlight quirk, and replace the broken_acpi_video quirk with this quirk for affected models. This new quirk disables acpi-video as before and also stops samsung-laptop from registering the SABI based samsung_laptop backlight interface, leaving only the working intel_backlight interface. This commit enables this new quirk for 3 models which are known to be affected, chances are that it needs to be used on other models too. BugLink: https://bugzilla.redhat.com/show_bug.cgi?id=1094948 # N145P BugLink: https://bugzilla.redhat.com/show_bug.cgi?id=1115713 # N250P Reported-by: Bertrik Sikken <bertrik@sikken.nl> # N150P Cc: stable@vger.kernel.org # 3.16 Signed-off-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Darren Hart <dvhart@linux.intel.com>
2015-01-09 22:10:01 +08:00
if (acpi_video_get_backlight_type() != acpi_backlight_vendor)
samsung-laptop: Add use_native_backlight quirk, and enable it on some models Since kernel 3.14 the backlight control has been broken on various Samsung Atom based netbooks. This has been bisected and this problem happens since commit b35684b8fa94 ("drm/i915: do full backlight setup at enable time") This has been reported and discussed in detail here: http://lists.freedesktop.org/archives/intel-gfx/2014-July/049395.html Unfortunately no-one has been able to fix this. This only affects Samsung Atom netbooks, and the Linux kernel and the BIOS of those laptops have never worked well together. All affected laptops already have a quirk to avoid using the standard acpi-video interface and instead use the samsung specific SABI interface which samsung-laptop uses. It seems that recent fixes to the i915 driver have also broken backlight control through the SABI interface. The intel_backlight driver OTOH works fine, and also allows for finer grained backlight control. So add a new use_native_backlight quirk, and replace the broken_acpi_video quirk with this quirk for affected models. This new quirk disables acpi-video as before and also stops samsung-laptop from registering the SABI based samsung_laptop backlight interface, leaving only the working intel_backlight interface. This commit enables this new quirk for 3 models which are known to be affected, chances are that it needs to be used on other models too. BugLink: https://bugzilla.redhat.com/show_bug.cgi?id=1094948 # N145P BugLink: https://bugzilla.redhat.com/show_bug.cgi?id=1115713 # N250P Reported-by: Bertrik Sikken <bertrik@sikken.nl> # N150P Cc: stable@vger.kernel.org # 3.16 Signed-off-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Darren Hart <dvhart@linux.intel.com>
2015-01-09 22:10:01 +08:00
samsung->handle_backlight = false;
#endif
ret = samsung_platform_init(samsung);
if (ret)
goto error_platform;
ret = samsung_sabi_init(samsung);
if (ret)
goto error_sabi;
ret = samsung_sysfs_init(samsung);
if (ret)
goto error_sysfs;
ret = samsung_backlight_init(samsung);
if (ret)
goto error_backlight;
ret = samsung_rfkill_init(samsung);
if (ret)
goto error_rfkill;
ret = samsung_leds_init(samsung);
if (ret)
goto error_leds;
ret = samsung_lid_handling_init(samsung);
if (ret)
goto error_lid_handling;
ret = samsung_debugfs_init(samsung);
if (ret)
goto error_debugfs;
samsung->pm_nb.notifier_call = samsung_pm_notification;
register_pm_notifier(&samsung->pm_nb);
samsung_platform_device = samsung->platform_device;
return ret;
error_debugfs:
samsung_lid_handling_exit(samsung);
error_lid_handling:
samsung_leds_exit(samsung);
error_leds:
samsung_rfkill_exit(samsung);
error_rfkill:
samsung_backlight_exit(samsung);
error_backlight:
samsung_sysfs_exit(samsung);
error_sysfs:
samsung_sabi_exit(samsung);
error_sabi:
samsung_platform_exit(samsung);
error_platform:
kfree(samsung);
return ret;
}
static void __exit samsung_exit(void)
{
struct samsung_laptop *samsung;
samsung = platform_get_drvdata(samsung_platform_device);
unregister_pm_notifier(&samsung->pm_nb);
samsung_debugfs_exit(samsung);
samsung_lid_handling_exit(samsung);
samsung_leds_exit(samsung);
samsung_rfkill_exit(samsung);
samsung_backlight_exit(samsung);
samsung_sysfs_exit(samsung);
samsung_sabi_exit(samsung);
samsung_platform_exit(samsung);
kfree(samsung);
samsung_platform_device = NULL;
}
module_init(samsung_init);
module_exit(samsung_exit);
MODULE_AUTHOR("Greg Kroah-Hartman <gregkh@suse.de>");
MODULE_DESCRIPTION("Samsung Backlight driver");
MODULE_LICENSE("GPL");