HID: magicmouse: ignore 'ivalid report id' while switching modes, v2

[pandora-kernel.git] / drivers / hid / hid-magicmouse.c

diff --git a/drivers/hid/hid-magicmouse.c b/drivers/hid/hid-magicmouse.c
index 0ec91c1..f0fbd7b 100644 (file)
--- a/drivers/hid/hid-magicmouse.c
+++ b/drivers/hid/hid-magicmouse.c
@@ -81,6 +81,28 @@ MODULE_PARM_DESC(report_undeciphered, "Report undeciphered multi-touch state fie
 #define NO_TOUCHES -1
 #define SINGLE_TOUCH_UP -2
 
+/* Touch surface information. Dimension is in hundredths of a mm, min and max
+ * are in units. */
+#define MOUSE_DIMENSION_X (float)9056
+#define MOUSE_MIN_X -1100
+#define MOUSE_MAX_X 1258
+#define MOUSE_RES_X ((MOUSE_MAX_X - MOUSE_MIN_X) / (MOUSE_DIMENSION_X / 100))
+#define MOUSE_DIMENSION_Y (float)5152
+#define MOUSE_MIN_Y -1589
+#define MOUSE_MAX_Y 2047
+#define MOUSE_RES_Y ((MOUSE_MAX_Y - MOUSE_MIN_Y) / (MOUSE_DIMENSION_Y / 100))
+
+#define TRACKPAD_DIMENSION_X (float)13000
+#define TRACKPAD_MIN_X -2909
+#define TRACKPAD_MAX_X 3167
+#define TRACKPAD_RES_X \
+       ((TRACKPAD_MAX_X - TRACKPAD_MIN_X) / (TRACKPAD_DIMENSION_X / 100))
+#define TRACKPAD_DIMENSION_Y (float)11000
+#define TRACKPAD_MIN_Y -2456
+#define TRACKPAD_MAX_Y 2565
+#define TRACKPAD_RES_Y \
+       ((TRACKPAD_MAX_Y - TRACKPAD_MIN_Y) / (TRACKPAD_DIMENSION_Y / 100))
+
 /**
  * struct magicmouse_sc - Tracks Magic Mouse-specific data.
  * @input: Input device through which we report events.
@@ -406,17 +428,31 @@ static void magicmouse_setup_input(struct input_dev *input, struct hid_device *h
                 * inverse of the reported Y.
                 */
                if (input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE) {
-                       input_set_abs_params(input, ABS_MT_POSITION_X, -1100,
-                               1358, 4, 0);
-                       input_set_abs_params(input, ABS_MT_POSITION_Y, -1589,
-                               2047, 4, 0);
+                       input_set_abs_params(input, ABS_MT_POSITION_X,
+                               MOUSE_MIN_X, MOUSE_MAX_X, 4, 0);
+                       input_set_abs_params(input, ABS_MT_POSITION_Y,
+                               MOUSE_MIN_Y, MOUSE_MAX_Y, 4, 0);
+
+                       input_abs_set_res(input, ABS_MT_POSITION_X,
+                               MOUSE_RES_X);
+                       input_abs_set_res(input, ABS_MT_POSITION_Y,
+                               MOUSE_RES_Y);
                } else { /* USB_DEVICE_ID_APPLE_MAGICTRACKPAD */
-                       input_set_abs_params(input, ABS_X, -2909, 3167, 4, 0);
-                       input_set_abs_params(input, ABS_Y, -2456, 2565, 4, 0);
-                       input_set_abs_params(input, ABS_MT_POSITION_X, -2909,
-                               3167, 4, 0);
-                       input_set_abs_params(input, ABS_MT_POSITION_Y, -2456,
-                               2565, 4, 0);
+                       input_set_abs_params(input, ABS_X, TRACKPAD_MIN_X,
+                               TRACKPAD_MAX_X, 4, 0);
+                       input_set_abs_params(input, ABS_Y, TRACKPAD_MIN_Y,
+                               TRACKPAD_MAX_Y, 4, 0);
+                       input_set_abs_params(input, ABS_MT_POSITION_X,
+                               TRACKPAD_MIN_X, TRACKPAD_MAX_X, 4, 0);
+                       input_set_abs_params(input, ABS_MT_POSITION_Y,
+                               TRACKPAD_MIN_Y, TRACKPAD_MAX_Y, 4, 0);
+
+                       input_abs_set_res(input, ABS_X, TRACKPAD_RES_X);
+                       input_abs_set_res(input, ABS_Y, TRACKPAD_RES_Y);
+                       input_abs_set_res(input, ABS_MT_POSITION_X,
+                               TRACKPAD_RES_X);
+                       input_abs_set_res(input, ABS_MT_POSITION_Y,
+                               TRACKPAD_RES_Y);
                }
 
                input_set_events_per_packet(input, 60);
@@ -501,9 +537,17 @@ static int magicmouse_probe(struct hid_device *hdev,
        }
        report->size = 6;
 
+       /*
+        * Some devices repond with 'invalid report id' when feature
+        * report switching it into multitouch mode is sent to it.
+        *
+        * This results in -EIO from the _raw low-level transport callback,
+        * but there seems to be no other way of switching the mode.
+        * Thus the super-ugly hacky success check below.
+        */
        ret = hdev->hid_output_raw_report(hdev, feature, sizeof(feature),
                        HID_FEATURE_REPORT);
-       if (ret != sizeof(feature)) {
+       if (ret != -EIO && ret != sizeof(feature)) {
                hid_err(hdev, "unable to request touch data (%d)\n", ret);
                goto err_stop_hw;
        }