[RESEND] [PATCH -next 2/2] acpi,rfkill,backlight: comapl-laptop update - use rfkill switch subsystem

[Cezary Jackiewicz <cezary.jackiewicz@gmail.com>]

From: Cezary Jackiewicz <cezary.jackiewicz@gmail.com>

Remove unnecessary attributes, use rfkill switch subsystem.

Signed-off-by: Cezary Jackiewicz <cezary.jackiewicz@gmail.com>
---
diff -Nuar a/drivers/misc/compal-laptop.c b/drivers/misc/compal-laptop.c
--- a/drivers/misc/compal-laptop.c	2008-07-09 21:40:06.000000000 +0200
+++ b/drivers/misc/compal-laptop.c	2008-07-09 22:54:15.000000000 +0200
@@ -43,6 +43,7 @@
 #include <linux/backlight.h>
 #include <linux/platform_device.h>
 #include <linux/autoconf.h>
+#include <linux/rfkill.h>
 
 #define COMPAL_DRIVER_VERSION "0.3.0"
 #define COMPAL_DRIVER_NAME "compal-laptop"
@@ -58,6 +59,10 @@
 #define WLAN_MASK	0x01
 #define BT_MASK		0x02
 
+/* rfkill switches */
+static struct rfkill *bluetooth_rfkill;
+static struct rfkill *wlan_rfkill;
+
 static int force;
 module_param(force, bool, 0);
 MODULE_PARM_DESC(force, "Force driver load, ignore DMI data");
@@ -83,67 +88,6 @@
 	return (int) result;
 }
 
-static int set_wlan_state(int state)
-{
-	u8 result, value;
-
-	ec_read(COMPAL_EC_COMMAND_WIRELESS, &result);
-
-	if ((result & KILLSWITCH_MASK) == 0)
-		return -EINVAL;
-	else {
-		if (state)
-			value = (u8) (result | WLAN_MASK);
-		else
-			value = (u8) (result & ~WLAN_MASK);
-		ec_write(COMPAL_EC_COMMAND_WIRELESS, value);
-	}
-
-	return 0;
-}
-
-static int set_bluetooth_state(int state)
-{
-	u8 result, value;
-
-	ec_read(COMPAL_EC_COMMAND_WIRELESS, &result);
-
-	if ((result & KILLSWITCH_MASK) == 0)
-		return -EINVAL;
-	else {
-		if (state)
-			value = (u8) (result | BT_MASK);
-		else
-			value = (u8) (result & ~BT_MASK);
-		ec_write(COMPAL_EC_COMMAND_WIRELESS, value);
-	}
-
-	return 0;
-}
-
-static int get_wireless_state(int *wlan, int *bluetooth)
-{
-	u8 result;
-
-	ec_read(COMPAL_EC_COMMAND_WIRELESS, &result);
-
-	if (wlan) {
-		if ((result & KILLSWITCH_MASK) == 0)
-			*wlan = 0;
-		else
-			*wlan = result & WLAN_MASK;
-	}
-
-	if (bluetooth) {
-		if ((result & KILLSWITCH_MASK) == 0)
-			*bluetooth = 0;
-		else
-			*bluetooth = (result & BT_MASK) >> 1;
-	}
-
-	return 0;
-}
-
 /* Backlight device stuff */
 
 static int bl_get_brightness(struct backlight_device *b)
@@ -166,93 +110,125 @@
 
 /* Platform device */
 
-static ssize_t show_wlan(struct device *dev,
-	struct device_attribute *attr, char *buf)
-{
-	int ret, enabled;
+static struct platform_driver compal_driver = {
+	.driver = {
+		.name = COMPAL_DRIVER_NAME,
+		.owner = THIS_MODULE,
+	}
+};
 
-	ret = get_wireless_state(&enabled, NULL);
-	if (ret < 0)
-		return ret;
+static struct platform_device *compal_device;
 
-	return sprintf(buf, "%i\n", enabled);
-}
+/* rfkill stuff */
 
-static ssize_t show_raw(struct device *dev,
-	struct device_attribute *attr, char *buf)
+static int wlan_rfk_set(void *data, enum rfkill_state state)
 {
-	u8 result;
+	u8 result, value;
 
 	ec_read(COMPAL_EC_COMMAND_WIRELESS, &result);
 
-	return sprintf(buf, "%i\n", result);
+	switch (state) {
+	case RFKILL_STATE_UNBLOCKED:
+		value = (u8) (result | WLAN_MASK);
+		break;
+	case RFKILL_STATE_SOFT_BLOCKED:
+		value = (u8) (result & ~WLAN_MASK);
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	ec_write(COMPAL_EC_COMMAND_WIRELESS, value);
+
+	return 0;
 }
 
-static ssize_t show_bluetooth(struct device *dev,
-	struct device_attribute *attr, char *buf)
+static int wlan_rfk_get(void *data, enum rfkill_state *state)
 {
-	int ret, enabled;
+	u8 result;
+
+	ec_read(COMPAL_EC_COMMAND_WIRELESS, &result);
 
-	ret = get_wireless_state(NULL, &enabled);
-	if (ret < 0)
-		return ret;
+	if ((result & KILLSWITCH_MASK) == 0)
+		*state = RFKILL_STATE_HARD_BLOCKED;
+	else
+		*state = ((result & WLAN_MASK) != 0) ?
+			RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
 
-	return sprintf(buf, "%i\n", enabled);
+	return 0;
 }
 
-static ssize_t store_wlan_state(struct device *dev,
-	struct device_attribute *attr, const char *buf, size_t count)
+static int bluetooth_rfk_set(void *data, enum rfkill_state state)
 {
-	int state, ret;
+	u8 result, value;
+
+	ec_read(COMPAL_EC_COMMAND_WIRELESS, &result);
 
-	if (sscanf(buf, "%i", &state) != 1 || (state < 0 || state > 1))
+	switch (state) {
+	case RFKILL_STATE_UNBLOCKED:
+		value = (u8) (result | BT_MASK);
+		break;
+	case RFKILL_STATE_SOFT_BLOCKED:
+		value = (u8) (result & ~BT_MASK);
+		break;
+	default:
 		return -EINVAL;
+	}
 
-	ret = set_wlan_state(state);
-	if (ret < 0)
-		return ret;
+	ec_write(COMPAL_EC_COMMAND_WIRELESS, value);
 
-	return count;
+	return 0;
 }
 
-static ssize_t store_bluetooth_state(struct device *dev,
-	struct device_attribute *attr, const char *buf, size_t count)
+static int bluetooth_rfk_get(void *data, enum rfkill_state *state)
 {
-	int state, ret;
+	u8 result;
 
-	if (sscanf(buf, "%i", &state) != 1 || (state < 0 || state > 1))
-		return -EINVAL;
+	ec_read(COMPAL_EC_COMMAND_WIRELESS, &result);
 
-	ret = set_bluetooth_state(state);
-	if (ret < 0)
-		return ret;
-
-	return count;
-}
-
-static DEVICE_ATTR(bluetooth, 0644, show_bluetooth, store_bluetooth_state);
-static DEVICE_ATTR(wlan, 0644, show_wlan, store_wlan_state);
-static DEVICE_ATTR(raw, 0444, show_raw, NULL);
-
-static struct attribute *compal_attributes[] = {
-	&dev_attr_bluetooth.attr,
-	&dev_attr_wlan.attr,
-	&dev_attr_raw.attr,
-	NULL
-};
+	if ((result & KILLSWITCH_MASK) == 0)
+		*state = RFKILL_STATE_HARD_BLOCKED;
+	else
+		*state = (((result & BT_MASK) >> 1) != 0) ?
+			RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
 
-static struct attribute_group compal_attribute_group = {
-	.attrs = compal_attributes
-};
+	return 0;
+}
 
-static struct platform_driver compal_driver = {
-	.driver = {
-		.name = COMPAL_DRIVER_NAME,
-		.owner = THIS_MODULE,
+static int __init compal_rfkill(struct rfkill **rfk,
+				const enum rfkill_type rfktype,
+				const char *name,
+				int (*toggle_radio)(void *, enum rfkill_state),
+				int (*get_state)(void *, enum rfkill_state *))
+{
+	int res;
+	enum rfkill_state initial_state;
+
+	(*rfk) = rfkill_allocate(&compal_device->dev, rfktype);
+	if (!*rfk) {
+		printk(COMPAL_ERR
+			"failed to allocate memory for rfkill class\n");
+		return -ENOMEM;
 	}
-};
 
-static struct platform_device *compal_device;
+	(*rfk)->name = name;
+	(*rfk)->get_state = get_state;
+	(*rfk)->toggle_radio = toggle_radio;
+	if (!get_state(NULL, &initial_state))
+		(*rfk)->state = initial_state;
+
+	res = rfkill_register(*rfk);
+	if (res < 0) {
+		printk(COMPAL_ERR
+			"failed to register %s rfkill switch: %d\n",
+			name, res);
+		rfkill_free(*rfk);
+		*rfk = NULL;
+		return res;
+	}
+
+	return 0;
+}
 
 /* Initialization */
 
@@ -342,23 +318,28 @@
 
 	ret = platform_device_add(compal_device);
 	if (ret)
-		goto fail_platform_device1;
+		goto fail_platform_device;
 
-	ret = sysfs_create_group(&compal_device->dev.kobj,
-		&compal_attribute_group);
-	if (ret)
-		goto fail_platform_device2;
+	/* Register rfkill stuff */
+
+	compal_rfkill(&wlan_rfkill,
+			RFKILL_TYPE_WLAN,
+			"compal_laptop_wlan_sw",
+			wlan_rfk_set,
+			wlan_rfk_get);
+
+	compal_rfkill(&bluetooth_rfkill,
+			RFKILL_TYPE_BLUETOOTH,
+			"compal_laptop_bluetooth_sw",
+			bluetooth_rfk_set,
+			bluetooth_rfk_get);
 
 	printk(COMPAL_INFO "driver "COMPAL_DRIVER_VERSION
 			" successfully loaded.\n");
 
 	return 0;
 
-fail_platform_device2:
-
-	platform_device_del(compal_device);
-
-fail_platform_device1:
+fail_platform_device:
 
 	platform_device_put(compal_device);
 
@@ -375,8 +356,16 @@
 
 static void __exit compal_cleanup(void)
 {
+	if (bluetooth_rfkill) {
+		rfkill_unregister(bluetooth_rfkill);
+		bluetooth_rfkill = NULL;
+	}
+
+	if (wlan_rfkill) {
+		rfkill_unregister(wlan_rfkill);
+		wlan_rfkill = NULL;
+	}
 
-	sysfs_remove_group(&compal_device->dev.kobj, &compal_attribute_group);
 	platform_device_unregister(compal_device);
 	platform_driver_unregister(&compal_driver);
 	backlight_device_unregister(compalbl_device);