toshiba_acpi: Add support for USB Sleep and Music

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

This patchs adds support to such feature, by creating a sysfs entry
named "usb_sleep_music", accepting only two values, 0 to disable and
1 to enable.

Signed-off-by: Azael Avalos <coproscefalo@gmail.com>
Signed-off-by: Darren Hart <dvhart@linux.intel.com>

diff --git a/drivers/platform/x86/toshiba_acpi.c b/drivers/platform/x86/toshiba_acpi.c
index 0f1b7a8..446ddc1 100644 (file)
--- 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;
@@ -929,6 +931,50 @@ 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)
@@ -1500,6 +1546,12 @@ 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);
@@ -1520,6 +1572,9 @@ 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,
@@ -1531,6 +1586,7 @@ 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,
 };
 
@@ -1895,6 +1951,42 @@ 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)
 {
@@ -1916,6 +2008,8 @@ 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;
 }
@@ -2331,6 +2425,9 @@ 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);