[PATCH 4/4] toshiba_acpi: Add support for USB Sleep and Music

Azael Avalos
2015-01-14T21:40:49Z

Newer Toshiba laptops now come with a feature called USB Sleep and
Charge, where the laptop speakers remain powered and the line-in jack
is used to connect an external device to use the laptop speakers.

This patchs adds support to such feature, by creating a sysfs entry
named "usb_sleep_music", accepting parameters zero and one, where
zero disables the feature and one enables it respectively.

Signed-off-by: Azael Avalos <coproscefalo@gmail.com>
---
drivers/platform/x86/toshiba_acpi.c | 97 +++++++++++++++++++++++++++++++++++++
1 file changed, 97 insertions(+)

diff --git a/drivers/platform/x86/toshiba_acpi.c b/drivers/platform/x86/toshiba_acpi.c
index eba5f9e..d107f38 100644
--- a/drivers/platform/x86/toshiba_acpi.c
+++ b/drivers/platform/x86/toshiba_acpi.c
@@ -124,6 +124,7 @@ MODULE_LICENSE("GPL");
#define SCI_ILLUMINATION 0x014e
#define SCI_USB_SLEEP_CHARGE 0x0150
#define SCI_KBD_ILLUM_STATUS 0x015c
+#define SCI_USB_SLEEP_MUSIC 0x015e
#define SCI_TOUCHPAD 0x050e

/* field definitions */
@@ -190,6 +191,7 @@ struct toshiba_acpi_dev {
unsigned int accelerometer_supported:1;
unsigned int usb_sleep_charge_supported:1;
unsigned int usb_rapid_charge_supported:1;
+ unsigned int usb_sleep_music_supported:1;
unsigned int sysfs_created:1;

struct mutex mutex;
@@ -930,6 +932,50 @@ static int toshiba_usb_rapid_charge_set(struct toshiba_acpi_dev *dev,
return 0;
}

+static int toshiba_usb_sleep_music_get(struct toshiba_acpi_dev *dev, u32 *state)
+{
+ u32 result;
+
+ if (!sci_open(dev))
+ return -EIO;
+
+ result = sci_read(dev, SCI_USB_SLEEP_MUSIC, state);
+ sci_close(dev);
+ if (result == TOS_FAILURE) {
+ pr_err("ACPI call to set USB S&C mode failed\n");
+ return -EIO;
+ } else if (result == TOS_NOT_SUPPORTED) {
+ pr_info("USB Sleep and Charge not supported\n");
+ return -ENODEV;
+ } else if (result == TOS_INPUT_DATA_ERROR) {
+ return -EIO;
+ }
+
+ return 0;
+}
+
+static int toshiba_usb_sleep_music_set(struct toshiba_acpi_dev *dev, u32 state)
+{
+ u32 result;
+
+ if (!sci_open(dev))
+ return -EIO;
+
+ result = sci_write(dev, SCI_USB_SLEEP_MUSIC, state);
+ sci_close(dev);
+ if (result == TOS_FAILURE) {
+ pr_err("ACPI call to set USB S&C mode failed\n");
+ return -EIO;
+ } else if (result == TOS_NOT_SUPPORTED) {
+ pr_info("USB Sleep and Charge 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)
@@ -1501,6 +1547,12 @@ static ssize_t toshiba_usb_rapid_charge_show(struct device *dev,
static ssize_t toshiba_usb_rapid_charge_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count);
+static ssize_t toshiba_usb_sleep_music_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf);
+static ssize_t toshiba_usb_sleep_music_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count);

static DEVICE_ATTR(kbd_backlight_mode, S_IRUGO | S_IWUSR,
toshiba_kbd_bl_mode_show, toshiba_kbd_bl_mode_store);
@@ -1521,6 +1573,9 @@ static DEVICE_ATTR(sleep_functions_on_battery, S_IRUGO | S_IWUSR,
static DEVICE_ATTR(usb_rapid_charge, S_IRUGO | S_IWUSR,
toshiba_usb_rapid_charge_show,
toshiba_usb_rapid_charge_store);
+static DEVICE_ATTR(usb_sleep_music, S_IRUGO | S_IWUSR,
+ toshiba_usb_sleep_music_show,
+ toshiba_usb_sleep_music_store);

static struct attribute *toshiba_attributes[] = {
&dev_attr_kbd_backlight_mode.attr,
@@ -1532,6 +1587,7 @@ static struct attribute *toshiba_attributes[] = {
&dev_attr_usb_sleep_charge.attr,
&dev_attr_sleep_functions_on_battery.attr,
&dev_attr_usb_rapid_charge.attr,
+ &dev_attr_usb_sleep_music.attr,
NULL,
};

@@ -1890,6 +1946,42 @@ static ssize_t toshiba_usb_rapid_charge_store(struct device *dev,
return count;
}

+static ssize_t toshiba_usb_sleep_music_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_sleep_music_get(toshiba, &state);
+ if (ret < 0)
+ return ret;
+
+ return sprintf(buf, "%d\n", state);
+}
+
+static ssize_t toshiba_usb_sleep_music_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;
+ if (state != 0 && state != 1)
+ return -EINVAL;
+
+ ret = toshiba_usb_sleep_music_set(toshiba, state);
+ if (ret)
+ return ret;
+
+ return count;
+}
+
static umode_t toshiba_sysfs_is_visible(struct kobject *kobj,
struct attribute *attr, int idx)
{
@@ -1911,6 +2003,8 @@ static umode_t toshiba_sysfs_is_visible(struct kobject *kobj,
exists = (drv->usb_sleep_charge_supported) ? true : false;
else if (attr == &dev_attr_usb_rapid_charge.attr)
exists = (drv->usb_rapid_charge_supported) ? true : false;
+ else if (attr == &dev_attr_usb_sleep_music.attr)
+ exists = (drv->usb_sleep_music_supported) ? true : false;

return exists ? attr->mode : 0;
}
@@ -2326,6 +2420,9 @@ static int toshiba_acpi_add(struct acpi_device *acpi_dev)
ret = toshiba_usb_rapid_charge_get(dev, &dummy);
dev->usb_rapid_charge_supported = !ret;

+ ret = toshiba_usb_sleep_music_get(dev, &dummy);
+ dev->usb_sleep_music_supported = !ret;
+
/* Determine whether or not BIOS supports fan and video interfaces */

ret = get_video_status(dev, &dummy);
--
2.2.1