HID: add support for 3M multitouch 22" display

Now support the 22" display and its updated firmware, including touch
width and height.

The number of touches can now go up to 60, and our single touch emulation
will fail when there are more than 6-7 touches; further work is needed on
this.

Signed-off-by: Stephane Chatty <chatty@enac.fr>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

1 files changed, 28 insertions, 3 deletions

diff --git a/drivers/hid/hid-3m-pct.c b/drivers/hid/hid-3m-pct.c
index 2370aefc86b2..883fd1af3c4c 100644
--- a/drivers/hid/hid-3m-pct.c
+++ b/drivers/hid/hid-3m-pct.c
@@ -1,7 +1,7 @@
 /*
  *  HID driver for 3M PCT multitouch panels
  *
- *  Copyright (c) 2009 Stephane Chatty <chatty@enac.fr>
+ *  Copyright (c) 2009-2010 Stephane Chatty <chatty@enac.fr>
  *
  */
 
@@ -24,7 +24,7 @@ MODULE_LICENSE("GPL");
 #include "hid-ids.h"
 
 struct mmm_finger {
-        __s32 x, y;
+        __s32 x, y, w, h;
         __u8 rank;
         bool touch, valid;
 };
@@ -81,7 +81,18 @@ static int mmm_input_mapping(struct hid_device *hdev, struct hid_input *hi,
                         /* touchscreen emulation */
                         hid_map_usage(hi, usage, bit, max, EV_KEY, BTN_TOUCH);
                         return 1;
+                case HID_DG_WIDTH:
+                        hid_map_usage(hi, usage, bit, max,
+                                        EV_ABS, ABS_MT_TOUCH_MAJOR);
+                        return 1;
+                case HID_DG_HEIGHT:
+                        hid_map_usage(hi, usage, bit, max,
+                                        EV_ABS, ABS_MT_TOUCH_MINOR);
+                        input_set_abs_params(hi->input, ABS_MT_ORIENTATION,
+                                        1, 1, 0, 0);
+                        return 1;
                 case HID_DG_CONTACTID:
+                        field->logical_maximum = 59;
                         hid_map_usage(hi, usage, bit, max,
                                         EV_ABS, ABS_MT_TRACKING_ID);
                         return 1;
@@ -127,9 +138,15 @@ static void mmm_filter_event(struct mmm_data *md, struct input_dev *input)
                         /* this finger is just placeholder data, ignore */
                 } else if (f->touch) {
                         /* this finger is on the screen */
+                        int wide = (f->w > f->h);
                         input_event(input, EV_ABS, ABS_MT_TRACKING_ID, i);
                         input_event(input, EV_ABS, ABS_MT_POSITION_X, f->x);
                         input_event(input, EV_ABS, ABS_MT_POSITION_Y, f->y);
+                        input_event(input, EV_ABS, ABS_MT_ORIENTATION, wide);
+                        input_event(input, EV_ABS, ABS_MT_TOUCH_MAJOR,
+                                                wide ? f->w : f->h);
+                        input_event(input, EV_ABS, ABS_MT_TOUCH_MINOR,
+                                                wide ? f->h : f->w);
                         input_mt_sync(input);
                         /*
                          * touchscreen emulation: maintain the age rank
@@ -196,6 +213,14 @@ static int mmm_event(struct hid_device *hid, struct hid_field *field,
                 case HID_DG_CONFIDENCE:
                         md->valid = value;
                         break;
+                case HID_DG_WIDTH:
+                        if (md->valid)
+                                md->f[md->curid].w = value;
+                        break;
+                case HID_DG_HEIGHT:
+                        if (md->valid)
+                                md->f[md->curid].h = value;
+                        break;
                 case HID_DG_CONTACTID:
                         if (md->valid) {
                                 md->curid = value;
@@ -254,6 +279,7 @@ static void mmm_remove(struct hid_device *hdev)
 
 static const struct hid_device_id mmm_devices[] = {
         { HID_USB_DEVICE(USB_VENDOR_ID_3M, USB_DEVICE_ID_3M1968) },
+        { HID_USB_DEVICE(USB_VENDOR_ID_3M, USB_DEVICE_ID_3M2256) },
         { }
 };
 MODULE_DEVICE_TABLE(hid, mmm_devices);
@@ -286,5 +312,4 @@ static void __exit mmm_exit(void)
 
 module_init(mmm_init);
 module_exit(mmm_exit);
-MODULE_LICENSE("GPL");