diff options
| author | Benjamin Tissoires <benjamin.tissoires@gmail.com> | 2011-09-21 16:56:54 +0200 |
|---|---|---|
| committer | Jiri Kosina <jkosina@suse.cz> | 2011-09-26 14:18:18 +0200 |
| commit | b77c3920e90e96103e4f41442999402925fe5f73 (patch) | |
| tree | 04df6c729a1e9b3afaa8e8f06b51fede1ef57779 | |
| parent | a062cc5a76fa1d12f0821e56e3746cad2dc2fc65 (diff) | |
HID: add autodetection of multitouch devices
As mentioned by http://www.microsoft.com/whdc/device/input/DigitizerDrvs_touch.mspx
multitouch devices are those that have the input report HID_CONTACTID.
This patch detects this and unloads the generic-usb driver.
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@enac.fr>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
| -rw-r--r-- | drivers/hid/hid-core.c | 6 | ||||
| -rw-r--r-- | drivers/hid/hid-input.c | 11 | ||||
| -rw-r--r-- | include/linux/hid.h | 1 |
3 files changed, 18 insertions, 0 deletions
diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c index 956f84968fa4..f869ab35e6d6 100644 --- a/drivers/hid/hid-core.c +++ b/drivers/hid/hid-core.c @@ -1212,6 +1212,12 @@ int hid_connect(struct hid_device *hdev, unsigned int connect_mask) if ((connect_mask & HID_CONNECT_HIDINPUT) && !hidinput_connect(hdev, connect_mask & HID_CONNECT_HIDINPUT_FORCE)) hdev->claimed |= HID_CLAIMED_INPUT; + if (hdev->quirks & HID_QUIRK_MULTITOUCH) { + /* this device should be handled by hid-multitouch, skip it */ + hdev->quirks &= ~HID_QUIRK_MULTITOUCH; + return -ENODEV; + } + if ((connect_mask & HID_CONNECT_HIDDEV) && hdev->hiddev_connect && !hdev->hiddev_connect(hdev, connect_mask & HID_CONNECT_HIDDEV_FORCE)) diff --git a/drivers/hid/hid-input.c b/drivers/hid/hid-input.c index 6559e2e3364e..f333139d1a48 100644 --- a/drivers/hid/hid-input.c +++ b/drivers/hid/hid-input.c @@ -474,6 +474,10 @@ static void hidinput_configure_usage(struct hid_input *hidinput, struct hid_fiel map_key_clear(BTN_STYLUS2); break; + case 0x51: /* ContactID */ + device->quirks |= HID_QUIRK_MULTITOUCH; + goto unknown; + default: goto unknown; } break; @@ -978,6 +982,13 @@ int hidinput_connect(struct hid_device *hid, unsigned int force) } } + if (hid->quirks & HID_QUIRK_MULTITOUCH) { + /* generic hid does not know how to handle multitouch devices */ + if (hidinput) + goto out_cleanup; + goto out_unwind; + } + if (hidinput && input_register_device(hidinput->input)) goto out_cleanup; diff --git a/include/linux/hid.h b/include/linux/hid.h index 9cf8e7ae7450..6fb743d72bfe 100644 --- a/include/linux/hid.h +++ b/include/linux/hid.h @@ -312,6 +312,7 @@ struct hid_item { #define HID_QUIRK_BADPAD 0x00000020 #define HID_QUIRK_MULTI_INPUT 0x00000040 #define HID_QUIRK_HIDINPUT_FORCE 0x00000080 +#define HID_QUIRK_MULTITOUCH 0x00000100 #define HID_QUIRK_SKIP_OUTPUT_REPORTS 0x00010000 #define HID_QUIRK_FULLSPEED_INTERVAL 0x10000000 #define HID_QUIRK_NO_INIT_REPORTS 0x20000000 |