toshiba_acpi: Add support for Panel Power ON

Toshiba laptops come with a feature called "Panel Open - Power ON",
which makes the laptop turn on whenever the LID is opened.

This patch adds support for such feature, by creating a sysfs entry
named "panel_power_on", accepting only two values, 0 to disable and
1 to enable such feature, however, a reboot is needed on every mode
change.

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 ccf628293ef27576950bcdd1c03979d908229e71..70370d3f5dcf6e97fb0695aff8d78c417e30060f 100644 (file)
--- a/drivers/platform/x86/toshiba_acpi.c
+++ b/drivers/platform/x86/toshiba_acpi.c
@@ -122,6 +122,7 @@ MODULE_LICENSE("GPL");
 #define HCI_KBD_ILLUMINATION           0x0095
 #define HCI_ECO_MODE                   0x0097
 #define HCI_ACCELEROMETER2             0x00a6
+#define SCI_PANEL_POWER_ON             0x010d
 #define SCI_ILLUMINATION               0x014e
 #define SCI_USB_SLEEP_CHARGE           0x0150
 #define SCI_KBD_ILLUM_STATUS           0x015c
@@ -195,6 +196,7 @@ struct toshiba_acpi_dev {
        unsigned int usb_rapid_charge_supported:1;
        unsigned int usb_sleep_music_supported:1;
        unsigned int kbd_function_keys_supported:1;
+       unsigned int panel_power_on_supported:1;
        unsigned int sysfs_created:1;
 
        struct mutex mutex;
@@ -1048,6 +1050,51 @@ static int toshiba_function_keys_set(struct toshiba_acpi_dev *dev, u32 mode)
        return 0;
 }
 
+/* Panel Power ON */
+static int toshiba_panel_power_on_get(struct toshiba_acpi_dev *dev, u32 *state)
+{
+       u32 result;
+
+       if (!sci_open(dev))
+               return -EIO;
+
+       result = sci_read(dev, SCI_PANEL_POWER_ON, state);
+       sci_close(dev);
+       if (result == TOS_FAILURE) {
+               pr_err("ACPI call to get Panel Power ON failed\n");
+               return -EIO;
+       } else if (result == TOS_NOT_SUPPORTED) {
+               pr_info("Panel Power on not supported\n");
+               return -ENODEV;
+       } else if (result == TOS_INPUT_DATA_ERROR) {
+               return -EIO;
+       }
+
+       return 0;
+}
+
+static int toshiba_panel_power_on_set(struct toshiba_acpi_dev *dev, u32 state)
+{
+       u32 result;
+
+       if (!sci_open(dev))
+               return -EIO;
+
+       result = sci_write(dev, SCI_PANEL_POWER_ON, state);
+       sci_close(dev);
+       if (result == TOS_FAILURE) {
+               pr_err("ACPI call to set Panel Power ON failed\n");
+               return -EIO;
+       } else if (result == TOS_NOT_SUPPORTED) {
+               pr_info("Panel Power ON 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)
@@ -1638,6 +1685,12 @@ static ssize_t toshiba_kbd_function_keys_show(struct device *dev,
 static ssize_t toshiba_kbd_function_keys_store(struct device *dev,
                                               struct device_attribute *attr,
                                               const char *buf, size_t count);
+static ssize_t toshiba_panel_power_on_show(struct device *dev,
+                                          struct device_attribute *attr,
+                                          char *buf);
+static ssize_t toshiba_panel_power_on_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,
@@ -1667,6 +1720,9 @@ static DEVICE_ATTR(usb_sleep_music, S_IRUGO | S_IWUSR,
 static DEVICE_ATTR(kbd_function_keys, S_IRUGO | S_IWUSR,
                   toshiba_kbd_function_keys_show,
                   toshiba_kbd_function_keys_store);
+static DEVICE_ATTR(panel_power_on, S_IRUGO | S_IWUSR,
+                  toshiba_panel_power_on_show,
+                  toshiba_panel_power_on_store);
 
 static struct attribute *toshiba_attributes[] = {
        &dev_attr_version.attr,
@@ -1682,6 +1738,7 @@ static struct attribute *toshiba_attributes[] = {
        &dev_attr_usb_rapid_charge.attr,
        &dev_attr_usb_sleep_music.attr,
        &dev_attr_kbd_function_keys.attr,
+       &dev_attr_panel_power_on.attr,
        NULL,
 };
 
@@ -2169,6 +2226,44 @@ static ssize_t toshiba_kbd_function_keys_store(struct device *dev,
        return count;
 }
 
+static ssize_t toshiba_panel_power_on_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_panel_power_on_get(toshiba, &state);
+       if (ret < 0)
+               return ret;
+
+       return sprintf(buf, "%d\n", state);
+}
+
+static ssize_t toshiba_panel_power_on_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_panel_power_on_set(toshiba, state);
+       if (ret)
+               return ret;
+
+       pr_info("Reboot for changes to Panel Power ON to take effect");
+
+       return count;
+}
+
 static umode_t toshiba_sysfs_is_visible(struct kobject *kobj,
                                        struct attribute *attr, int idx)
 {
@@ -2196,6 +2291,8 @@ static umode_t toshiba_sysfs_is_visible(struct kobject *kobj,
                exists = (drv->usb_sleep_music_supported) ? true : false;
        else if (attr == &dev_attr_kbd_function_keys.attr)
                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;
 
        return exists ? attr->mode : 0;
 }
@@ -2617,6 +2714,9 @@ static int toshiba_acpi_add(struct acpi_device *acpi_dev)
        ret = toshiba_function_keys_get(dev, &dummy);
        dev->kbd_function_keys_supported = !ret;
 
+       ret = toshiba_panel_power_on_get(dev, &dummy);
+       dev->panel_power_on_supported = !ret;
+
        /* Determine whether or not BIOS supports fan and video interfaces */
 
        ret = get_video_status(dev, &dummy);