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Commit 8667ca95 authored by Alex Hung's avatar Alex Hung Committed by Matthew Garrett
Browse files

hp-wmi: add supports for POST code error 



HP laptops include a POST code error query 0x2A that reports
which point BIOS fails to boot at. The error code is kept in CMOS
until it is cleared.

Signed-off-by: default avatarAlex Hung <alex.hung@canonical.com>
Signed-off-by: default avatarMatthew Garrett <matthew.garrett@nebula.com>
parent e8f56c80

drivers/platform/x86/hp-wmi.c

+47 −0
Original line number Original line Diff line number Diff line
@@ -56,6 +56,7 @@ MODULE_ALIAS("wmi:5FB7F034-2C63-45e9-BE91-3D44E2C707E4"); 
#define HPWMI_BIOS_QUERY 0x9

#define HPWMI_BIOS_QUERY 0x9

#define HPWMI_HOTKEY_QUERY 0xc

#define HPWMI_HOTKEY_QUERY 0xc

#define HPWMI_WIRELESS2_QUERY 0x1b

#define HPWMI_WIRELESS2_QUERY 0x1b

#define HPWMI_POSTCODEERROR_QUERY 0x2a





enum hp_wmi_radio {

enum hp_wmi_radio {

	HPWMI_WIFI = 0,

	HPWMI_WIFI = 0,
@@ -400,6 +401,16 @@ static int hp_wmi_rfkill2_refresh(void) 
	return 0;

	return 0;

}

}





static int hp_wmi_post_code_state(void)

{

	int state = 0;

	int ret = hp_wmi_perform_query(HPWMI_POSTCODEERROR_QUERY, 0, &state,

				       sizeof(state), sizeof(state));

	if (ret)

		return -EINVAL;

	return state;

}



static ssize_t show_display(struct device *dev, struct device_attribute *attr,

static ssize_t show_display(struct device *dev, struct device_attribute *attr,

			    char *buf)

			    char *buf)

{

{
@@ -445,6 +456,16 @@ static ssize_t show_tablet(struct device *dev, struct device_attribute *attr, 
	return sprintf(buf, "%d\n", value);

	return sprintf(buf, "%d\n", value);

}

}





static ssize_t show_postcode(struct device *dev, struct device_attribute *attr,

			 char *buf)

{

	/* Get the POST error code of previous boot failure. */

	int value = hp_wmi_post_code_state();

	if (value < 0)

		return -EINVAL;

	return sprintf(buf, "0x%x\n", value);

}



static ssize_t set_als(struct device *dev, struct device_attribute *attr,

static ssize_t set_als(struct device *dev, struct device_attribute *attr,

		       const char *buf, size_t count)

		       const char *buf, size_t count)

{

{
@@ -457,11 +478,33 @@ static ssize_t set_als(struct device *dev, struct device_attribute *attr, 
	return count;

	return count;

}

}





static ssize_t set_postcode(struct device *dev, struct device_attribute *attr,

		       const char *buf, size_t count)

{

	int ret;

	u32 tmp;

	long unsigned int tmp2;



	ret = kstrtoul(buf, 10, &tmp2);

	if (ret || tmp2 != 1)

		return -EINVAL;



	/* Clear the POST error code. It is kept until until cleared. */

	tmp = (u32) tmp2;

	ret = hp_wmi_perform_query(HPWMI_POSTCODEERROR_QUERY, 1, &tmp,

				       sizeof(tmp), sizeof(tmp));

	if (ret)

		return -EINVAL;



	return count;

}



static DEVICE_ATTR(display, S_IRUGO, show_display, NULL);

static DEVICE_ATTR(display, S_IRUGO, show_display, NULL);

static DEVICE_ATTR(hddtemp, S_IRUGO, show_hddtemp, NULL);

static DEVICE_ATTR(hddtemp, S_IRUGO, show_hddtemp, NULL);

static DEVICE_ATTR(als, S_IRUGO | S_IWUSR, show_als, set_als);

static DEVICE_ATTR(als, S_IRUGO | S_IWUSR, show_als, set_als);

static DEVICE_ATTR(dock, S_IRUGO, show_dock, NULL);

static DEVICE_ATTR(dock, S_IRUGO, show_dock, NULL);

static DEVICE_ATTR(tablet, S_IRUGO, show_tablet, NULL);

static DEVICE_ATTR(tablet, S_IRUGO, show_tablet, NULL);

static DEVICE_ATTR(postcode, S_IRUGO | S_IWUSR, show_postcode, set_postcode);





static void hp_wmi_notify(u32 value, void *context)

static void hp_wmi_notify(u32 value, void *context)

{

{
@@ -642,6 +685,7 @@ static void cleanup_sysfs(struct platform_device *device) 
	device_remove_file(&device->dev, &dev_attr_als);

	device_remove_file(&device->dev, &dev_attr_als);

	device_remove_file(&device->dev, &dev_attr_dock);

	device_remove_file(&device->dev, &dev_attr_dock);

	device_remove_file(&device->dev, &dev_attr_tablet);

	device_remove_file(&device->dev, &dev_attr_tablet);

	device_remove_file(&device->dev, &dev_attr_postcode);

}

}





static int hp_wmi_rfkill_setup(struct platform_device *device)

static int hp_wmi_rfkill_setup(struct platform_device *device)
@@ -857,6 +901,9 @@ static int __init hp_wmi_bios_setup(struct platform_device *device) 
	if (err)

	if (err)

		goto add_sysfs_error;

		goto add_sysfs_error;

	err = device_create_file(&device->dev, &dev_attr_tablet);

	err = device_create_file(&device->dev, &dev_attr_tablet);

	if (err)

		goto add_sysfs_error;

	err = device_create_file(&device->dev, &dev_attr_postcode);

	if (err)

	if (err)

		goto add_sysfs_error;

		goto add_sysfs_error;

	return 0;

	return 0;