toshiba_acpi: Add support for cooling method feature

This patch adds support to query and set the "Cooling Method" feature,
which basically changes how the system fan behaves, depending on the
supported cooling methods.

Depending on the laptop model, these are the (so far...) available
cooling methods:
- Maximum Performance
- Performance
- Battery Optimized

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 73833079bac89a0b97381037b7eacef125ca15fe..c6f92ec636e7d40cedd896b8f3b7f25111389600 100644 (file)
--- a/drivers/platform/x86/toshiba_acpi.c
+++ b/drivers/platform/x86/toshiba_acpi.c
@@ -117,6 +117,7 @@ MODULE_LICENSE("GPL");
 #define HCI_LCD_BRIGHTNESS             0x002a
 #define HCI_WIRELESS                   0x0056
 #define HCI_ACCELEROMETER              0x006d
+#define HCI_COOLING_METHOD             0x007f
 #define HCI_KBD_ILLUMINATION           0x0095
 #define HCI_ECO_MODE                   0x0097
 #define HCI_ACCELEROMETER2             0x00a6
@@ -186,6 +187,7 @@ struct toshiba_acpi_dev {
        int usbsc_bat_level;
        int usbsc_mode_base;
        int hotkey_event_type;
+       int max_cooling_method;
 
        unsigned int illumination_supported:1;
        unsigned int video_supported:1;
@@ -205,6 +207,7 @@ struct toshiba_acpi_dev {
        unsigned int panel_power_on_supported:1;
        unsigned int usb_three_supported:1;
        unsigned int wwan_supported:1;
+       unsigned int cooling_method_supported:1;
        unsigned int sysfs_created:1;
        unsigned int special_functions;
 
@@ -1194,6 +1197,53 @@ static int toshiba_wwan_set(struct toshiba_acpi_dev *dev, u32 state)
        return out[0] == TOS_SUCCESS ? 0 : -EIO;
 }
 
+/* Cooling Method */
+static void toshiba_cooling_method_available(struct toshiba_acpi_dev *dev)
+{
+       u32 in[TCI_WORDS] = { HCI_GET, HCI_COOLING_METHOD, 0, 0, 0, 0 };
+       u32 out[TCI_WORDS];
+       acpi_status status;
+
+       dev->cooling_method_supported = 0;
+       dev->max_cooling_method = 0;
+
+       status = tci_raw(dev, in, out);
+       if (ACPI_FAILURE(status))
+               pr_err("ACPI call to get Cooling Method failed\n");
+
+       if (out[0] != TOS_SUCCESS && out[0] != TOS_SUCCESS2)
+               return;
+
+       dev->cooling_method_supported = 1;
+       dev->max_cooling_method = out[3];
+}
+
+static int toshiba_cooling_method_get(struct toshiba_acpi_dev *dev, u32 *state)
+{
+       u32 result = hci_read(dev, HCI_COOLING_METHOD, state);
+
+       if (result == TOS_FAILURE)
+               pr_err("ACPI call to get Cooling Method failed\n");
+
+       if (result == TOS_NOT_SUPPORTED)
+               return -ENODEV;
+
+       return (result == TOS_SUCCESS || result == TOS_SUCCESS2) ? 0 : -EIO;
+}
+
+static int toshiba_cooling_method_set(struct toshiba_acpi_dev *dev, u32 state)
+{
+       u32 result = hci_write(dev, HCI_COOLING_METHOD, state);
+
+       if (result == TOS_FAILURE)
+               pr_err("ACPI call to get Cooling Method failed\n");
+
+       if (result == TOS_NOT_SUPPORTED)
+               return -ENODEV;
+
+       return (result == TOS_SUCCESS || result == TOS_SUCCESS2) ? 0 : -EIO;
+}
+
 /* Transflective Backlight */
 static int get_tr_backlight_status(struct toshiba_acpi_dev *dev, u32 *status)
 {
@@ -2779,6 +2829,8 @@ static void print_supported_features(struct toshiba_acpi_dev *dev)
                pr_cont(" usb3");
        if (dev->wwan_supported)
                pr_cont(" wwan");
+       if (dev->cooling_method_supported)
+               pr_cont(" cooling-method");
 
        pr_cont("\n");
 }
@@ -2963,6 +3015,8 @@ static int toshiba_acpi_add(struct acpi_device *acpi_dev)
        if (dev->wwan_supported)
                toshiba_acpi_setup_wwan_rfkill(dev);
 
+       toshiba_cooling_method_available(dev);
+
        print_supported_features(dev);
 
        ret = sysfs_create_group(&dev->acpi_dev->dev.kobj,