Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 17fe4b3d authored by Azael Avalos's avatar Azael Avalos Committed by Darren Hart
Browse files

toshiba_acpi: Add support to enable/disable USB 3 



Toshiba laptops that come with USB 3 ports have a feature that lets
them disable USB 3 functionality and act as a regular USB 2 port, and
thus, saving power.

This patch adds support to that feature, by creating a sysfs entry
named "usb_three", acceptig only two parameters, 0 to disable the
USB 3 (acting as a USB 2) and 1 to enable it, however, a reboot is
needed everytime this is toggled.

Signed-off-by: default avatarAzael Avalos <coproscefalo@gmail.com>
Signed-off-by: default avatarDarren Hart <dvhart@linux.intel.com>
parent 35d53cea

drivers/platform/x86/toshiba_acpi.c

+103 −0
Original line number Diff line number Diff line
@@ -127,6 +127,7 @@ MODULE_LICENSE("GPL"); 
#define SCI_USB_SLEEP_CHARGE		0x0150

#define SCI_KBD_ILLUM_STATUS		0x015c

#define SCI_USB_SLEEP_MUSIC		0x015e

#define SCI_USB_THREE			0x0169

#define SCI_TOUCHPAD			0x050e

#define SCI_KBD_FUNCTION_KEYS		0x0522
@@ -197,6 +198,7 @@ struct toshiba_acpi_dev { 
	unsigned int usb_sleep_music_supported:1;

	unsigned int kbd_function_keys_supported:1;

	unsigned int panel_power_on_supported:1;

	unsigned int usb_three_supported:1;

	unsigned int sysfs_created:1;



	struct mutex mutex;
@@ -1095,6 +1097,51 @@ static int toshiba_panel_power_on_set(struct toshiba_acpi_dev *dev, u32 state) 
	return 0;

}



/* USB Three */

static int toshiba_usb_three_get(struct toshiba_acpi_dev *dev, u32 *state)

{

	u32 result;



	if (!sci_open(dev))

		return -EIO;



	result = sci_read(dev, SCI_USB_THREE, state);

	sci_close(dev);

	if (result == TOS_FAILURE) {

		pr_err("ACPI call to get USB 3 failed\n");

		return -EIO;

	} else if (result == TOS_NOT_SUPPORTED) {

		pr_info("USB 3 not supported\n");

		return -ENODEV;

	} else if (result == TOS_INPUT_DATA_ERROR) {

		return -EIO;

	}



	return 0;

}



static int toshiba_usb_three_set(struct toshiba_acpi_dev *dev, u32 state)

{

	u32 result;



	if (!sci_open(dev))

		return -EIO;



	result = sci_write(dev, SCI_USB_THREE, state);

	sci_close(dev);

	if (result == TOS_FAILURE) {

		pr_err("ACPI call to set USB 3 failed\n");

		return -EIO;

	} else if (result == TOS_NOT_SUPPORTED) {

		pr_info("USB 3 not supported\n");

		return -ENODEV;

	} else if (result == TOS_INPUT_DATA_ERROR) {

		return -EIO;

	}



	return 0;

}



/* Bluetooth rfkill handlers */



static u32 hci_get_bt_present(struct toshiba_acpi_dev *dev, bool *present)
@@ -1691,6 +1738,12 @@ static ssize_t toshiba_panel_power_on_show(struct device *dev, 
static ssize_t toshiba_panel_power_on_store(struct device *dev,

					    struct device_attribute *attr,

					    const char *buf, size_t count);

static ssize_t toshiba_usb_three_show(struct device *dev,

				      struct device_attribute *attr,

				      char *buf);

static ssize_t toshiba_usb_three_store(struct device *dev,

				       struct device_attribute *attr,

				       const char *buf, size_t count);



static DEVICE_ATTR(version, S_IRUGO, toshiba_version_show, NULL);

static DEVICE_ATTR(fan, S_IRUGO | S_IWUSR,
@@ -1723,6 +1776,8 @@ static DEVICE_ATTR(kbd_function_keys, S_IRUGO | S_IWUSR, 
static DEVICE_ATTR(panel_power_on, S_IRUGO | S_IWUSR,

		   toshiba_panel_power_on_show,

		   toshiba_panel_power_on_store);

static DEVICE_ATTR(usb_three, S_IRUGO | S_IWUSR,

		   toshiba_usb_three_show, toshiba_usb_three_store);



static struct attribute *toshiba_attributes[] = {

	&dev_attr_version.attr,
@@ -1739,6 +1794,7 @@ static struct attribute *toshiba_attributes[] = { 
	&dev_attr_usb_sleep_music.attr,

	&dev_attr_kbd_function_keys.attr,

	&dev_attr_panel_power_on.attr,

	&dev_attr_usb_three.attr,

	NULL,

};
@@ -2264,6 +2320,48 @@ static ssize_t toshiba_panel_power_on_store(struct device *dev, 
	return count;

}



static ssize_t toshiba_usb_three_show(struct device *dev,

				      struct device_attribute *attr,

				      char *buf)

{

	struct toshiba_acpi_dev *toshiba = dev_get_drvdata(dev);

	u32 state;

	int ret;



	ret = toshiba_usb_three_get(toshiba, &state);

	if (ret < 0)

		return ret;



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

}



static ssize_t toshiba_usb_three_store(struct device *dev,

				       struct device_attribute *attr,

				       const char *buf, size_t count)

{

	struct toshiba_acpi_dev *toshiba = dev_get_drvdata(dev);

	int state;

	int ret;



	ret = kstrtoint(buf, 0, &state);

	if (ret)

		return ret;

	/* Check for USB 3 mode where:

	 * 0 - Disabled (Acts like a USB 2 port, saving power)

	 * 1 - Enabled

	 */

	if (state != 0 && state != 1)

		return -EINVAL;



	ret = toshiba_usb_three_set(toshiba, state);

	if (ret)

		return ret;



	pr_info("Reboot for changes to USB 3 to take effect");



	return count;

}



static umode_t toshiba_sysfs_is_visible(struct kobject *kobj,

					struct attribute *attr, int idx)

{
@@ -2293,6 +2391,8 @@ static umode_t toshiba_sysfs_is_visible(struct kobject *kobj, 
		exists = (drv->kbd_function_keys_supported) ? true : false;

	else if (attr == &dev_attr_panel_power_on.attr)

		exists = (drv->panel_power_on_supported) ? true : false;

	else if (attr == &dev_attr_usb_three.attr)

		exists = (drv->usb_three_supported) ? true : false;



	return exists ? attr->mode : 0;

}
@@ -2717,6 +2817,9 @@ static int toshiba_acpi_add(struct acpi_device *acpi_dev) 
	ret = toshiba_panel_power_on_get(dev, &dummy);

	dev->panel_power_on_supported = !ret;



	ret = toshiba_usb_three_get(dev, &dummy);

	dev->usb_three_supported = !ret;



	/* Determine whether or not BIOS supports fan and video interfaces */



	ret = get_video_status(dev, &dummy);