msi-laptop: Add threeg sysfs file for support query 3G state by standard 66/62 ec command

Add threeg sysfs file for support query 3G state by standard 66/62 ec
command, the MSI standard ec interface supported this feature.
Signed-off-by: NLee, Chun-Yi <jlee@novell.com>
Cc: Lennart Poettering <mzxreary@0pointer.de>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

drivers/platform/x86/msi-laptop.c

@@ -70,6 +70,7 @@
 #define MSI_STANDARD_EC_BLUETOOTH_MASK	(1 << 0)
 #define MSI_STANDARD_EC_WEBCAM_MASK	(1 << 1)
 #define MSI_STANDARD_EC_WLAN_MASK	(1 << 3)
+#define MSI_STANDARD_EC_3G_MASK		(1 << 4)
 
 static int force;
 module_param(force, bool, 0);
@@ -80,7 +81,7 @@ module_param(auto_brightness, int, 0);
 MODULE_PARM_DESC(auto_brightness, "Enable automatic brightness control (0: disabled; 1: enabled; 2: don't touch)");
 
 static bool old_ec_model;
-static int wlan_s, bluetooth_s;
+static int wlan_s, bluetooth_s, threeg_s;
 
 /* Hardware access */
 
@@ -169,6 +170,8 @@ static int get_wireless_state_ec_standard(void)
 
 	bluetooth_s = !!(rdata & MSI_STANDARD_EC_BLUETOOTH_MASK);
 
+	threeg_s = !!(rdata & MSI_STANDARD_EC_3G_MASK);
+
 	return 0;
 }
 
@@ -230,6 +233,23 @@ static ssize_t show_bluetooth(struct device *dev,
 	return sprintf(buf, "%i\n", enabled);
 }
 
+static ssize_t show_threeg(struct device *dev,
+	struct device_attribute *attr, char *buf)
+{
+
+	int ret;
+
+	/* old msi ec not support 3G */
+	if (old_ec_model)
+		return -1;
+
+	ret = get_wireless_state_ec_standard();
+	if (ret < 0)
+		return ret;
+
+	return sprintf(buf, "%i\n", threeg_s);
+}
+
 static ssize_t show_lcd_level(struct device *dev,
 	struct device_attribute *attr, char *buf)
 {
@@ -292,6 +312,7 @@ static DEVICE_ATTR(lcd_level, 0644, show_lcd_level, store_lcd_level);
 static DEVICE_ATTR(auto_brightness, 0644, show_auto_brightness, store_auto_brightness);
 static DEVICE_ATTR(bluetooth, 0444, show_bluetooth, NULL);
 static DEVICE_ATTR(wlan, 0444, show_wlan, NULL);
+static DEVICE_ATTR(threeg, 0444, show_threeg, NULL);
 
 static struct attribute *msipf_attributes[] = {
 	&dev_attr_lcd_level.attr,
@@ -412,6 +433,12 @@ static int __init msi_init(void)
 	if (ret)
 		goto fail_platform_device2;
 
+	if (!old_ec_model) {
+		ret = device_create_file(&msipf_device->dev, &dev_attr_threeg);
+		if (ret)
+			goto fail_platform_device2;
+	}
+
 	/* Disable automatic brightness control by default because
 	 * this module was probably loaded to do brightness control in
 	 * software. */
@@ -446,6 +473,8 @@ static void __exit msi_cleanup(void)
 {
 
 	sysfs_remove_group(&msipf_device->dev.kobj, &msipf_attribute_group);
+	if (!old_ec_model)
+		device_remove_file(&msipf_device->dev, &dev_attr_threeg);
 	platform_device_unregister(msipf_device);
 	platform_driver_unregister(&msipf_driver);
 	backlight_device_unregister(msibl_device);