HID: separate mode switching function for wacom bluetooth driver

wacom_poke function allows to switch tablet reporting speed. The patch
dosen't add any new functionality, but it's preparation for user-space
speed switching through sysfs.

Signed-off-by: Przemo Firszt <przemo@firszt.eu>
Signed-off-by: Bastien Nocera <hadess@hadess.net>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

1 files changed, 40 insertions, 26 deletions

diff --git a/drivers/hid/hid-wacom.c b/drivers/hid/hid-wacom.c
index 4d2d2a2e1a5f..f9d493931b02 100644
--- a/drivers/hid/hid-wacom.c
+++ b/drivers/hid/hid-wacom.c
@@ -103,6 +103,44 @@ static int wacom_ac_get_property(struct power_supply *psy,
 }
 #endif
 
+static void wacom_poke(struct hid_device *hdev, u8 speed)
+{
+        int limit, ret;
+        char rep_data[2];
+
+        rep_data[0] = 0x03 ; rep_data[1] = 0x00;
+        limit = 3;
+        do {
+                ret = hdev->hid_output_raw_report(hdev, rep_data, 2,
+                                HID_FEATURE_REPORT);
+        } while (ret < 0 && limit-- > 0);
+
+        if (ret >= 0) {
+                if (speed == 0)
+                        rep_data[0] = 0x05;
+                else
+                        rep_data[0] = 0x06;
+
+                rep_data[1] = 0x00;
+                limit = 3;
+                do {
+                        ret = hdev->hid_output_raw_report(hdev, rep_data, 2,
+                                        HID_FEATURE_REPORT);
+                } while (ret < 0 && limit-- > 0);
+
+                if (ret >= 0)
+                        return;
+        }
+
+        /*
+         * Note that if the raw queries fail, it's not a hard failure and it
+         * is safe to continue
+         */
+        dev_warn(&hdev->dev, "failed to poke device, command %d, err %d\n",
+                                rep_data[0], ret);
+        return;
+}
+
 static int wacom_raw_event(struct hid_device *hdev, struct hid_report *report,
                 u8 *raw_data, int size)
 {
@@ -236,9 +274,7 @@ static int wacom_probe(struct hid_device *hdev,
         struct hid_input *hidinput;
         struct input_dev *input;
         struct wacom_data *wdata;
-        char rep_data[2];
         int ret;
-        int limit;
 
         wdata = kzalloc(sizeof(*wdata), GFP_KERNEL);
         if (wdata == NULL) {
@@ -261,30 +297,8 @@ static int wacom_probe(struct hid_device *hdev,
                 goto err_free;
         }
 
-        /*
-         * Note that if the raw queries fail, it's not a hard failure and it
-         * is safe to continue
-         */
-
-        /* Set Wacom mode2 */
-        rep_data[0] = 0x03; rep_data[1] = 0x00;
-        limit = 3;
-        do {
-                ret = hdev->hid_output_raw_report(hdev, rep_data, 2,
-                                HID_FEATURE_REPORT);
-        } while (ret < 0 && limit-- > 0);
-        if (ret < 0)
-                dev_warn(&hdev->dev, "failed to poke device #1, %d\n", ret);
-
-        /* 0x06 - high reporting speed, 0x05 - low speed */
-        rep_data[0] = 0x06; rep_data[1] = 0x00;
-        limit = 3;
-        do {
-                ret = hdev->hid_output_raw_report(hdev, rep_data, 2,
-                                HID_FEATURE_REPORT);
-        } while (ret < 0 && limit-- > 0);
-        if (ret < 0)
-                dev_warn(&hdev->dev, "failed to poke device #2, %d\n", ret);
+        /* Set Wacom mode 2 with high reporting speed */
+        wacom_poke(hdev, 1);
 
 #ifdef CONFIG_HID_WACOM_POWER_SUPPLY
         wdata->battery.properties = wacom_battery_props;