#include <linux/dmi.h>
#include <linux/platform_device.h>
#include <linux/rfkill.h>
+#include <linux/acpi.h>
/*
* This driver is needed because a number of Samsung laptops do not hook
{ },
};
-static const struct sabi_config *sabi_config;
+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 rfkill *rfk;
+
+ bool handle_backlight;
+ bool has_stepping_quirk;
+};
+
-static void __iomem *sabi;
-static void __iomem *sabi_iface;
-static void __iomem *f0000_segment;
-static struct backlight_device *backlight_device;
-static struct mutex sabi_mutex;
-static struct platform_device *sdev;
-static struct rfkill *rfk;
-static bool has_stepping_quirk;
static bool force;
module_param(force, bool, 0);
module_param(debug, bool, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(debug, "Debug enabled or not");
-static int sabi_get_command(u8 command, struct sabi_retval *sretval)
+static int sabi_get_command(struct samsung_laptop *samsung,
+ u8 command, struct sabi_retval *sretval)
{
+ const struct sabi_config *config = samsung->config;
int retval = 0;
- u16 port = readw(sabi + sabi_config->header_offsets.port);
+ u16 port = readw(samsung->sabi + config->header_offsets.port);
u8 complete, iface_data;
- mutex_lock(&sabi_mutex);
+ mutex_lock(&samsung->sabi_mutex);
/* enable memory to be able to write to it */
- outb(readb(sabi + sabi_config->header_offsets.en_mem), port);
+ outb(readb(samsung->sabi + config->header_offsets.en_mem), port);
/* write out the command */
- writew(sabi_config->main_function, sabi_iface + SABI_IFACE_MAIN);
- writew(command, sabi_iface + SABI_IFACE_SUB);
- writeb(0, sabi_iface + SABI_IFACE_COMPLETE);
- outb(readb(sabi + sabi_config->header_offsets.iface_func), port);
+ 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);
+ outb(readb(samsung->sabi + config->header_offsets.iface_func), port);
/* write protect memory to make it safe */
- outb(readb(sabi + sabi_config->header_offsets.re_mem), port);
+ outb(readb(samsung->sabi + config->header_offsets.re_mem), port);
/* see if the command actually succeeded */
- complete = readb(sabi_iface + SABI_IFACE_COMPLETE);
- iface_data = readb(sabi_iface + SABI_IFACE_DATA);
+ complete = readb(samsung->sabi_iface + SABI_IFACE_COMPLETE);
+ iface_data = readb(samsung->sabi_iface + SABI_IFACE_DATA);
if (complete != 0xaa || iface_data == 0xff) {
pr_warn("SABI get command 0x%02x failed with completion flag 0x%02x and data 0x%02x\n",
command, complete, iface_data);
* There are commands that need more, but not for the ones we
* currently care about.
*/
- sretval->retval[0] = readb(sabi_iface + SABI_IFACE_DATA);
- sretval->retval[1] = readb(sabi_iface + SABI_IFACE_DATA + 1);
- sretval->retval[2] = readb(sabi_iface + SABI_IFACE_DATA + 2);
- sretval->retval[3] = readb(sabi_iface + SABI_IFACE_DATA + 3);
+ sretval->retval[0] = readb(samsung->sabi_iface + SABI_IFACE_DATA);
+ sretval->retval[1] = readb(samsung->sabi_iface + SABI_IFACE_DATA + 1);
+ sretval->retval[2] = readb(samsung->sabi_iface + SABI_IFACE_DATA + 2);
+ sretval->retval[3] = readb(samsung->sabi_iface + SABI_IFACE_DATA + 3);
exit:
- mutex_unlock(&sabi_mutex);
+ mutex_unlock(&samsung->sabi_mutex);
return retval;
}
-static int sabi_set_command(u8 command, u8 data)
+static int sabi_set_command(struct samsung_laptop *samsung,
+ u8 command, u8 data)
{
+ const struct sabi_config *config = samsung->config;
int retval = 0;
- u16 port = readw(sabi + sabi_config->header_offsets.port);
+ u16 port = readw(samsung->sabi + config->header_offsets.port);
u8 complete, iface_data;
- mutex_lock(&sabi_mutex);
+ mutex_lock(&samsung->sabi_mutex);
/* enable memory to be able to write to it */
- outb(readb(sabi + sabi_config->header_offsets.en_mem), port);
+ outb(readb(samsung->sabi + config->header_offsets.en_mem), port);
/* write out the command */
- writew(sabi_config->main_function, sabi_iface + SABI_IFACE_MAIN);
- writew(command, sabi_iface + SABI_IFACE_SUB);
- writeb(0, sabi_iface + SABI_IFACE_COMPLETE);
- writeb(data, sabi_iface + SABI_IFACE_DATA);
- outb(readb(sabi + sabi_config->header_offsets.iface_func), port);
+ 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);
+ writeb(data, samsung->sabi_iface + SABI_IFACE_DATA);
+ outb(readb(samsung->sabi + config->header_offsets.iface_func), port);
/* write protect memory to make it safe */
- outb(readb(sabi + sabi_config->header_offsets.re_mem), port);
+ outb(readb(samsung->sabi + config->header_offsets.re_mem), port);
/* see if the command actually succeeded */
- complete = readb(sabi_iface + SABI_IFACE_COMPLETE);
- iface_data = readb(sabi_iface + SABI_IFACE_DATA);
+ complete = readb(samsung->sabi_iface + SABI_IFACE_COMPLETE);
+ iface_data = readb(samsung->sabi_iface + SABI_IFACE_DATA);
if (complete != 0xaa || iface_data == 0xff) {
pr_warn("SABI set command 0x%02x failed with completion flag 0x%02x and data 0x%02x\n",
command, complete, iface_data);
retval = -EINVAL;
}
- mutex_unlock(&sabi_mutex);
+ mutex_unlock(&samsung->sabi_mutex);
return retval;
}
-static void test_backlight(void)
+static void test_backlight(struct samsung_laptop *samsung)
{
+ const struct sabi_commands *commands = &samsung->config->commands;
struct sabi_retval sretval;
- sabi_get_command(sabi_config->commands.get_backlight, &sretval);
+ sabi_get_command(samsung, commands->get_backlight, &sretval);
printk(KERN_DEBUG "backlight = 0x%02x\n", sretval.retval[0]);
- sabi_set_command(sabi_config->commands.set_backlight, 0);
+ sabi_set_command(samsung, commands->set_backlight, 0);
printk(KERN_DEBUG "backlight should be off\n");
- sabi_get_command(sabi_config->commands.get_backlight, &sretval);
+ sabi_get_command(samsung, commands->get_backlight, &sretval);
printk(KERN_DEBUG "backlight = 0x%02x\n", sretval.retval[0]);
msleep(1000);
- sabi_set_command(sabi_config->commands.set_backlight, 1);
+ sabi_set_command(samsung, commands->set_backlight, 1);
printk(KERN_DEBUG "backlight should be on\n");
- sabi_get_command(sabi_config->commands.get_backlight, &sretval);
+ sabi_get_command(samsung, commands->get_backlight, &sretval);
printk(KERN_DEBUG "backlight = 0x%02x\n", sretval.retval[0]);
}
-static void test_wireless(void)
+static void test_wireless(struct samsung_laptop *samsung)
{
+ const struct sabi_commands *commands = &samsung->config->commands;
struct sabi_retval sretval;
- sabi_get_command(sabi_config->commands.get_wireless_button, &sretval);
+ sabi_get_command(samsung, commands->get_wireless_button, &sretval);
printk(KERN_DEBUG "wireless led = 0x%02x\n", sretval.retval[0]);
- sabi_set_command(sabi_config->commands.set_wireless_button, 0);
+ sabi_set_command(samsung, commands->set_wireless_button, 0);
printk(KERN_DEBUG "wireless led should be off\n");
- sabi_get_command(sabi_config->commands.get_wireless_button, &sretval);
+ sabi_get_command(samsung, commands->get_wireless_button, &sretval);
printk(KERN_DEBUG "wireless led = 0x%02x\n", sretval.retval[0]);
msleep(1000);
- sabi_set_command(sabi_config->commands.set_wireless_button, 1);
+ sabi_set_command(samsung, commands->set_wireless_button, 1);
printk(KERN_DEBUG "wireless led should be on\n");
- sabi_get_command(sabi_config->commands.get_wireless_button, &sretval);
+ sabi_get_command(samsung, commands->get_wireless_button, &sretval);
printk(KERN_DEBUG "wireless led = 0x%02x\n", sretval.retval[0]);
}
-static u8 read_brightness(void)
+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_retval sretval;
int user_brightness = 0;
int retval;
- retval = sabi_get_command(sabi_config->commands.get_brightness,
+ retval = sabi_get_command(samsung, commands->get_brightness,
&sretval);
if (!retval) {
user_brightness = sretval.retval[0];
- if (user_brightness > sabi_config->min_brightness)
- user_brightness -= sabi_config->min_brightness;
+ if (user_brightness > config->min_brightness)
+ user_brightness -= config->min_brightness;
else
user_brightness = 0;
}
return user_brightness;
}
-static void set_brightness(u8 user_brightness)
+static void set_brightness(struct samsung_laptop *samsung, u8 user_brightness)
{
- u8 user_level = user_brightness + sabi_config->min_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 (has_stepping_quirk && user_level != 0) {
+ 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())
+ if (user_brightness == read_brightness(samsung))
return;
- sabi_set_command(sabi_config->commands.set_brightness, 0);
+ sabi_set_command(samsung, commands->set_brightness, 0);
}
- sabi_set_command(sabi_config->commands.set_brightness, user_level);
+ sabi_set_command(samsung, commands->set_brightness, user_level);
}
static int get_brightness(struct backlight_device *bd)
{
- return (int)read_brightness();
+ struct samsung_laptop *samsung = bl_get_data(bd);
+
+ return read_brightness(samsung);
}
-static void check_for_stepping_quirk(void)
+static void check_for_stepping_quirk(struct samsung_laptop *samsung)
{
- u8 initial_level;
- u8 check_level;
- u8 orig_level = read_brightness();
+ int initial_level;
+ int check_level;
+ int orig_level = read_brightness(samsung);
/*
* Some laptops exhibit the strange behaviour of stepping toward
*/
if (orig_level == 0)
- set_brightness(1);
+ set_brightness(samsung, 1);
- initial_level = read_brightness();
+ initial_level = read_brightness(samsung);
if (initial_level <= 2)
check_level = initial_level + 2;
else
check_level = initial_level - 2;
- has_stepping_quirk = false;
- set_brightness(check_level);
+ samsung->has_stepping_quirk = false;
+ set_brightness(samsung, check_level);
- if (read_brightness() != check_level) {
- has_stepping_quirk = true;
+ if (read_brightness(samsung) != check_level) {
+ samsung->has_stepping_quirk = true;
pr_info("enabled workaround for brightness stepping quirk\n");
}
- set_brightness(orig_level);
+ set_brightness(samsung, orig_level);
}
static int update_status(struct backlight_device *bd)
{
- set_brightness(bd->props.brightness);
+ 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_command(sabi_config->commands.set_backlight, 1);
+ sabi_set_command(samsung, commands->set_backlight, 1);
else
- sabi_set_command(sabi_config->commands.set_backlight, 0);
+ sabi_set_command(samsung, commands->set_backlight, 0);
+
return 0;
}
static int rfkill_set(void *data, bool blocked)
{
+ struct samsung_laptop *samsung = data;
+ const struct sabi_commands *commands = &samsung->config->commands;
+
/* Do something with blocked...*/
/*
* blocked == false is on
* blocked == true is off
*/
if (blocked)
- sabi_set_command(sabi_config->commands.set_wireless_button, 0);
+ sabi_set_command(samsung, commands->set_wireless_button, 0);
else
- sabi_set_command(sabi_config->commands.set_wireless_button, 1);
+ sabi_set_command(samsung, commands->set_wireless_button, 1);
return 0;
}
.set_block = rfkill_set,
};
-static int init_wireless(struct platform_device *sdev)
-{
- int retval;
-
- rfk = rfkill_alloc("samsung-wifi", &sdev->dev, RFKILL_TYPE_WLAN,
- &rfkill_ops, NULL);
- if (!rfk)
- return -ENOMEM;
-
- retval = rfkill_register(rfk);
- if (retval) {
- rfkill_destroy(rfk);
- return -ENODEV;
- }
-
- return 0;
-}
-
-static void destroy_wireless(void)
-{
- rfkill_unregister(rfk);
- rfkill_destroy(rfk);
-}
-
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_retval sretval;
int retval;
int i;
/* Read the state */
- retval = sabi_get_command(sabi_config->commands.get_performance_level,
+ retval = sabi_get_command(samsung, commands->get_performance_level,
&sretval);
if (retval)
return retval;
/* The logic is backwards, yeah, lots of fun... */
- for (i = 0; sabi_config->performance_levels[i].name; ++i) {
- if (sretval.retval[0] == sabi_config->performance_levels[i].value)
- return sprintf(buf, "%s\n", sabi_config->performance_levels[i].name);
+ for (i = 0; config->performance_levels[i].name; ++i) {
+ if (sretval.retval[0] == config->performance_levels[i].value)
+ return sprintf(buf, "%s\n", config->performance_levels[i].name);
}
return sprintf(buf, "%s\n", "unknown");
}
struct device_attribute *attr, const char *buf,
size_t count)
{
- if (count >= 1) {
- int i;
- for (i = 0; sabi_config->performance_levels[i].name; ++i) {
- const struct sabi_performance_level *level =
- &sabi_config->performance_levels[i];
- if (!strncasecmp(level->name, buf, strlen(level->name))) {
- sabi_set_command(sabi_config->commands.set_performance_level,
- level->value);
- break;
- }
+ 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_command(samsung,
+ commands->set_performance_level,
+ level->value);
+ break;
}
- if (!sabi_config->performance_levels[i].name)
- return -EINVAL;
}
+
+ 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 struct attribute *platform_attributes[] = {
+ &dev_attr_performance_level.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->rfk) {
+ rfkill_unregister(samsung->rfk);
+ rfkill_destroy(samsung->rfk);
+ samsung->rfk = NULL;
+ }
+}
+
+static int __init samsung_rfkill_init(struct samsung_laptop *samsung)
+{
+ int retval;
+
+ samsung->rfk = rfkill_alloc("samsung-wifi",
+ &samsung->platform_device->dev,
+ RFKILL_TYPE_WLAN,
+ &rfkill_ops, samsung);
+ if (!samsung->rfk)
+ return -ENOMEM;
+
+ retval = rfkill_register(samsung->rfk);
+ if (retval) {
+ rfkill_destroy(samsung->rfk);
+ samsung->rfk = NULL;
+ return -ENODEV;
+ }
+
+ return 0;
+}
+
+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 mode_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;
+
+ 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 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_command(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)
+{
+ 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));
+}
+
+static void __init samsung_sabi_selftest(struct samsung_laptop *samsung,
+ unsigned int ifaceP)
+{
+ const struct sabi_config *config = samsung->config;
+ struct sabi_retval sretval;
+
+ printk(KERN_DEBUG "ifaceP = 0x%08x\n", ifaceP);
+ printk(KERN_DEBUG "sabi_iface = %p\n", samsung->sabi_iface);
+
+ if (samsung->handle_backlight)
+ test_backlight(samsung);
+ test_wireless(samsung);
+
+ sabi_get_command(samsung, config->commands.get_brightness, &sretval);
+ printk(KERN_DEBUG "brightness = 0x%02x\n", sretval.retval[0]);
+}
+
+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) {
+ pr_err("Can't map the segment at 0xf0000\n");
+ ret = -EINVAL;
+ goto exit;
+ }
+
+ /* Try to find one of the signatures in memory to find the header */
+ for (i = 0; sabi_configs[i].test_string != 0; ++i) {
+ samsung->config = &sabi_configs[i];
+ loca = find_signature(samsung->f0000_segment,
+ samsung->config->test_string);
+ if (loca != 0xffff)
+ break;
+ }
+
+ if (loca == 0xffff) {
+ 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);
+
+ if (debug)
+ samsung_sabi_infos(samsung, 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;
+ samsung->sabi_iface = ioremap_nocache(ifaceP, 16);
+ if (!samsung->sabi_iface) {
+ pr_err("Can't remap %x\n", ifaceP);
+ ret = -EINVAL;
+ goto exit;
+ }
+
+ if (debug)
+ samsung_sabi_selftest(samsung, ifaceP);
+
+ /* Turn on "Linux" mode in the BIOS */
+ if (commands->set_linux != 0xff) {
+ int retval = sabi_set_command(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);
+
+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 __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 int __init dmi_check_cb(const struct dmi_system_id *id)
{
- pr_info("found laptop model '%s'\n",
- id->ident);
+ pr_info("found laptop model '%s'\n", id->ident);
return 1;
}
};
MODULE_DEVICE_TABLE(dmi, samsung_dmi_table);
-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 struct platform_device *samsung_platform_device;
static int __init samsung_init(void)
{
- struct backlight_properties props;
- struct sabi_retval sretval;
- unsigned int ifaceP;
- int i;
- int loca;
- int retval;
-
- mutex_init(&sabi_mutex);
+ struct samsung_laptop *samsung;
+ int ret;
if (!force && !dmi_check_system(samsung_dmi_table))
return -ENODEV;
- f0000_segment = ioremap_nocache(0xf0000, 0xffff);
- if (!f0000_segment) {
- pr_err("Can't map the segment at 0xf0000\n");
- return -EINVAL;
- }
-
- /* Try to find one of the signatures in memory to find the header */
- for (i = 0; sabi_configs[i].test_string != 0; ++i) {
- sabi_config = &sabi_configs[i];
- loca = find_signature(f0000_segment, sabi_config->test_string);
- if (loca != 0xffff)
- break;
- }
-
- if (loca == 0xffff) {
- pr_err("This computer does not support SABI\n");
- goto error_no_signature;
- }
-
- /* point to the SMI port Number */
- loca += 1;
- sabi = (f0000_segment + loca);
-
- if (debug) {
- 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(sabi + sabi_config->header_offsets.port));
- printk(KERN_DEBUG " SMI Interface Function = 0x%02x\n",
- readb(sabi + sabi_config->header_offsets.iface_func));
- printk(KERN_DEBUG " SMI enable memory buffer = 0x%02x\n",
- readb(sabi + sabi_config->header_offsets.en_mem));
- printk(KERN_DEBUG " SMI restore memory buffer = 0x%02x\n",
- readb(sabi + sabi_config->header_offsets.re_mem));
- printk(KERN_DEBUG " SABI data offset = 0x%04x\n",
- readw(sabi + sabi_config->header_offsets.data_offset));
- printk(KERN_DEBUG " SABI data segment = 0x%04x\n",
- readw(sabi + sabi_config->header_offsets.data_segment));
- }
-
- /* Get a pointer to the SABI Interface */
- ifaceP = (readw(sabi + sabi_config->header_offsets.data_segment) & 0x0ffff) << 4;
- ifaceP += readw(sabi + sabi_config->header_offsets.data_offset) & 0x0ffff;
- sabi_iface = ioremap_nocache(ifaceP, 16);
- if (!sabi_iface) {
- pr_err("Can't remap %x\n", ifaceP);
- goto error_no_signature;
- }
- if (debug) {
- printk(KERN_DEBUG "ifaceP = 0x%08x\n", ifaceP);
- printk(KERN_DEBUG "sabi_iface = %p\n", sabi_iface);
+ samsung = kzalloc(sizeof(*samsung), GFP_KERNEL);
+ if (!samsung)
+ return -ENOMEM;
- test_backlight();
- test_wireless();
+ mutex_init(&samsung->sabi_mutex);
+ samsung->handle_backlight = true;
- retval = sabi_get_command(sabi_config->commands.get_brightness,
- &sretval);
- printk(KERN_DEBUG "brightness = 0x%02x\n", sretval.retval[0]);
+#ifdef CONFIG_ACPI
+ /* Don't handle backlight here if the acpi video already handle it */
+ if (acpi_video_backlight_support()) {
+ pr_info("Backlight controlled by ACPI video driver\n");
+ samsung->handle_backlight = false;
}
-
- /* Turn on "Linux" mode in the BIOS */
- if (sabi_config->commands.set_linux != 0xff) {
- retval = sabi_set_command(sabi_config->commands.set_linux,
- 0x81);
- if (retval) {
- pr_warn("Linux mode was not set!\n");
- goto error_no_platform;
- }
- }
-
- /* Check for stepping quirk */
- check_for_stepping_quirk();
-
- /* knock up a platform device to hang stuff off of */
- sdev = platform_device_register_simple("samsung", -1, NULL, 0);
- if (IS_ERR(sdev))
- goto error_no_platform;
-
- /* create a backlight device to talk to this one */
- memset(&props, 0, sizeof(struct backlight_properties));
- props.type = BACKLIGHT_PLATFORM;
- props.max_brightness = sabi_config->max_brightness -
- sabi_config->min_brightness;
- backlight_device = backlight_device_register("samsung", &sdev->dev,
- NULL, &backlight_ops,
- &props);
- if (IS_ERR(backlight_device))
- goto error_no_backlight;
-
- backlight_device->props.brightness = read_brightness();
- backlight_device->props.power = FB_BLANK_UNBLANK;
- backlight_update_status(backlight_device);
-
- retval = init_wireless(sdev);
- if (retval)
- goto error_no_rfk;
-
- retval = device_create_file(&sdev->dev, &dev_attr_performance_level);
- if (retval)
- goto error_file_create;
-
- return 0;
-
-error_file_create:
- destroy_wireless();
-
-error_no_rfk:
- backlight_device_unregister(backlight_device);
-
-error_no_backlight:
- platform_device_unregister(sdev);
-
-error_no_platform:
- iounmap(sabi_iface);
-
-error_no_signature:
- iounmap(f0000_segment);
- return -EINVAL;
+#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;
+
+ samsung_platform_device = samsung->platform_device;
+ return ret;
+
+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)
{
- /* Turn off "Linux" mode in the BIOS */
- if (sabi_config->commands.set_linux != 0xff)
- sabi_set_command(sabi_config->commands.set_linux, 0x80);
-
- device_remove_file(&sdev->dev, &dev_attr_performance_level);
- backlight_device_unregister(backlight_device);
- destroy_wireless();
- iounmap(sabi_iface);
- iounmap(f0000_segment);
- platform_device_unregister(sdev);
+ struct samsung_laptop *samsung;
+
+ samsung = platform_get_drvdata(samsung_platform_device);
+
+ 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);
projects / firefly-linux-kernel-4.4.55.git / blobdiff