ideapad: rewrite the hw rfkill notify

1. Read hw rfkill status by ec command
2. Not to touch sw status of each rfkill when hw rfkill notify
3. Initial rfkill status when module loaded
Signed-off-by: Ike Panhc <ike.pan@canonical.com>
Signed-off-by: Matthew Garrett <mjg@redhat.com>

drivers/platform/x86/ideapad_acpi.c

@@ -160,32 +160,6 @@ static int write_ec_cmd(acpi_handle handle, int cmd, unsigned long data)
 }
 /* the above is ACPI helpers */
 
-static int ideapad_dev_get_state(int device)
-{
-	acpi_status status;
-	union acpi_object in_param;
-	struct acpi_object_list input = { 1, &in_param };
-	struct acpi_buffer output;
-	union acpi_object out_obj;
-
-	output.length = sizeof(out_obj);
-	output.pointer = &out_obj;
-
-	in_param.type = ACPI_TYPE_INTEGER;
-	in_param.integer.value = device + 1;
-
-	status = acpi_evaluate_object(NULL, "\\_SB_.GECN", &input, &output);
-	if (ACPI_FAILURE(status)) {
-		printk(KERN_WARNING "IdeaPAD \\_SB_.GECN method failed %d\n", status);
-		return -ENODEV;
-	}
-	if (out_obj.type != ACPI_TYPE_INTEGER) {
-		printk(KERN_WARNING "IdeaPAD \\_SB_.GECN method returned unexpected type\n");
-		return -ENODEV;
-	}
-	return out_obj.integer.value;
-}
-
 static int ideapad_dev_set_state(int device, int state)
 {
 	acpi_status status;
@@ -253,32 +227,39 @@ static struct rfkill_ops ideapad_rfk_ops = {
 static void ideapad_sync_rfk_state(struct acpi_device *adevice)
 {
 	struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);
-	int hw_blocked = !ideapad_dev_get_state(IDEAPAD_DEV_KILLSW);
+	acpi_handle handle = priv->handle;
+	unsigned long hw_blocked;
 	int i;
 
-	rfkill_set_hw_state(priv->rfk[IDEAPAD_DEV_KILLSW], hw_blocked);
-	for (i = IDEAPAD_DEV_WLAN; i < IDEAPAD_DEV_KILLSW; i++)
-		if (priv->rfk[i])
-			rfkill_set_hw_state(priv->rfk[i], hw_blocked);
-	if (hw_blocked)
+	if (read_ec_data(handle, 0x23, &hw_blocked))
 		return;
+	hw_blocked = !hw_blocked;
 
-	for (i = IDEAPAD_DEV_WLAN; i < IDEAPAD_DEV_KILLSW; i++)
+	for (i = IDEAPAD_DEV_WLAN; i <= IDEAPAD_DEV_KILLSW; i++)
 		if (priv->rfk[i])
-			rfkill_set_sw_state(priv->rfk[i], !ideapad_dev_get_state(i));
+			rfkill_set_hw_state(priv->rfk[i], hw_blocked);
 }
 
 static int ideapad_register_rfkill(struct acpi_device *adevice, int dev)
 {
 	struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);
 	int ret;
+	unsigned long sw_blocked;
 
-	priv->rfk[dev] = rfkill_alloc(ideapad_rfk_data[dev-1].name, &adevice->dev,
-				      ideapad_rfk_data[dev-1].type, &ideapad_rfk_ops,
+	priv->rfk[dev] = rfkill_alloc(ideapad_rfk_data[dev].name, &adevice->dev,
+				      ideapad_rfk_data[dev].type, &ideapad_rfk_ops,
 				      (void *)(long)dev);
 	if (!priv->rfk[dev])
 		return -ENOMEM;
 
+	if (read_ec_data(ideapad_priv->handle, ideapad_rfk_data[dev].opcode-1,
+			 &sw_blocked)) {
+		rfkill_init_sw_state(priv->rfk[dev], 0);
+	} else {
+		sw_blocked = !sw_blocked;
+		rfkill_init_sw_state(priv->rfk[dev], sw_blocked);
+	}
+
 	ret = rfkill_register(priv->rfk[dev]);
 	if (ret) {
 		rfkill_destroy(priv->rfk[dev]);