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Date:	Mon, 30 Apr 2012 16:58:44 +0200
From:	Benjamin Tissoires <benjamin.tissoires@...il.com>
To:	Henrik Rydberg <rydberg@...omail.se>
Cc:	Jiri Kosina <jkosina@...e.cz>,
	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
	Benjamin Tissoires <Benjamin_Tissoires@...itech.com>,
	Stephane Chatty <chatty@...c.fr>
Subject: Re: [PATCH v3 5/6] hid-multitouch: Switch to device groups

Hi Henrik,

though I was not able to test it with the devices we have, I remarked
a small regression in this patch: the detection of the serial protocol
is not handled anymore. I was indeed relying on the fact that the
parameter "id" in mt_probe was null to know that the device was not
already in the list of known devices. I think that this small pitfall
can be assessed in a separate commit later (after more testing) to
keep the patch clear.

By looking at the whole code of the patch set, Acked-by: Benjamin
Tissoires <benjamin.tissoires@...il.com>

I'll tell you by the end of the week if anything goes wrong with our
multitouch devices, but I don't see any reasons why it could fail.

Thanks for the work Henrik,
Benjamin

On Mon, Apr 23, 2012 at 12:07, Henrik Rydberg <rydberg@...omail.se> wrote:
> Switch the driver over to device group handling.  By adding the
> HID_GROUP_MULTITOUCH group to hid-core, hid-generic will no longer
> match multitouch devices.  By adding the HID_GROUP_MULTITOUCH entry to
> the device list, hid-multitouch will match all unknown multitouch
> devices, and udev will automatically load the module.
>
> Since HID_QUIRK_MULTITOUCH never gets set, the special quirks handling
> can be removed.  Since all HID MT devices have HID_DG_CONTACTID, they
> can be removed from the hid_have_special_driver list.
>
> Cc: Benjamin Tissoires <Benjamin_Tissoires@...itech.com>
> Cc: Stephane Chatty <chatty@...-enac.fr>
> Signed-off-by: Henrik Rydberg <rydberg@...omail.se>
> ---
>  drivers/hid/hid-core.c       |   75 +++---------------------------------------
>  drivers/hid/hid-input.c      |   11 -------
>  drivers/hid/hid-multitouch.c |    3 +-
>  include/linux/hid.h          |    2 +-
>  4 files changed, 7 insertions(+), 84 deletions(-)
>
> diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c
> index cb5a103..0a107fe 100644
> --- a/drivers/hid/hid-core.c
> +++ b/drivers/hid/hid-core.c
> @@ -660,6 +660,8 @@ static u8 *fetch_item(__u8 *start, __u8 *end, struct hid_item *item)
>
>  static void hid_scan_usage(struct hid_device *hid, u32 usage)
>  {
> +       if (usage == HID_DG_CONTACTID)
> +               hid->group = HID_GROUP_MULTITOUCH;
>  }
>
>  /*
> @@ -1350,10 +1352,6 @@ 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 */
> -               return -ENODEV;
> -       }
>
>        if ((connect_mask & HID_CONNECT_HIDDEV) && hdev->hiddev_connect &&
>                        !hdev->hiddev_connect(hdev,
> @@ -1430,13 +1428,10 @@ EXPORT_SYMBOL_GPL(hid_disconnect);
>
>  /* a list of devices for which there is a specialized driver on HID bus */
>  static const struct hid_device_id hid_have_special_driver[] = {
> -       { HID_USB_DEVICE(USB_VENDOR_ID_3M, USB_DEVICE_ID_3M1968) },
> -       { HID_USB_DEVICE(USB_VENDOR_ID_3M, USB_DEVICE_ID_3M2256) },
>        { HID_USB_DEVICE(USB_VENDOR_ID_A4TECH, USB_DEVICE_ID_A4TECH_WCP32PU) },
>        { HID_USB_DEVICE(USB_VENDOR_ID_A4TECH, USB_DEVICE_ID_A4TECH_X5_005D) },
>        { HID_USB_DEVICE(USB_VENDOR_ID_A4TECH, USB_DEVICE_ID_A4TECH_RP_649) },
>        { HID_USB_DEVICE(USB_VENDOR_ID_ACRUX, 0x0802) },
> -       { HID_USB_DEVICE(USB_VENDOR_ID_ACTIONSTAR, USB_DEVICE_ID_ACTIONSTAR_1011) },
>        { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ATV_IRCONTROL) },
>        { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_IRCONTROL4) },
>        { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_MIGHTYMOUSE) },
> @@ -1501,60 +1496,32 @@ static const struct hid_device_id hid_have_special_driver[] = {
>        { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_WIRELESS_2011_ISO) },
>        { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_FOUNTAIN_TP_ONLY) },
>        { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_GEYSER1_TP_ONLY) },
> -       { HID_USB_DEVICE(USB_VENDOR_ID_ASUS, USB_DEVICE_ID_ASUS_T91MT) },
> -       { HID_USB_DEVICE(USB_VENDOR_ID_ASUS, USB_DEVICE_ID_ASUSTEK_MULTITOUCH_YFO) },
>        { HID_USB_DEVICE(USB_VENDOR_ID_BELKIN, USB_DEVICE_ID_FLIP_KVM) },
>        { HID_USB_DEVICE(USB_VENDOR_ID_BTC, USB_DEVICE_ID_BTC_EMPREX_REMOTE) },
>        { HID_USB_DEVICE(USB_VENDOR_ID_BTC, USB_DEVICE_ID_BTC_EMPREX_REMOTE_2) },
> -       { HID_USB_DEVICE(USB_VENDOR_ID_CANDO, USB_DEVICE_ID_CANDO_PIXCIR_MULTI_TOUCH) },
> -       { HID_USB_DEVICE(USB_VENDOR_ID_CANDO, USB_DEVICE_ID_CANDO_MULTI_TOUCH) },
> -       { HID_USB_DEVICE(USB_VENDOR_ID_CANDO, USB_DEVICE_ID_CANDO_MULTI_TOUCH_10_1) },
> -       { HID_USB_DEVICE(USB_VENDOR_ID_CANDO, USB_DEVICE_ID_CANDO_MULTI_TOUCH_11_6) },
> -       { HID_USB_DEVICE(USB_VENDOR_ID_CANDO, USB_DEVICE_ID_CANDO_MULTI_TOUCH_15_6) },
>        { HID_USB_DEVICE(USB_VENDOR_ID_CHERRY, USB_DEVICE_ID_CHERRY_CYMOTION) },
>        { HID_USB_DEVICE(USB_VENDOR_ID_CHERRY, USB_DEVICE_ID_CHERRY_CYMOTION_SOLAR) },
>        { HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_TACTICAL_PAD) },
>        { HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_WIRELESS) },
>        { HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_WIRELESS2) },
> -       { HID_USB_DEVICE(USB_VENDOR_ID_CHUNGHWAT, USB_DEVICE_ID_CHUNGHWAT_MULTITOUCH) },
>        { HID_USB_DEVICE(USB_VENDOR_ID_CREATIVELABS, USB_DEVICE_ID_PRODIKEYS_PCMIDI) },
> -       { HID_USB_DEVICE(USB_VENDOR_ID_CVTOUCH, USB_DEVICE_ID_CVTOUCH_SCREEN) },
>        { HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_BARCODE_1) },
>        { HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_BARCODE_2) },
>        { HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_BARCODE_3) },
>        { HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_MOUSE) },
> -       { HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_TRUETOUCH) },
>        { HID_USB_DEVICE(USB_VENDOR_ID_DRAGONRISE, 0x0006) },
>        { HID_USB_DEVICE(USB_VENDOR_ID_DRAGONRISE, 0x0011) },
> -       { HID_USB_DEVICE(USB_VENDOR_ID_DWAV, USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_480D) },
> -       { HID_USB_DEVICE(USB_VENDOR_ID_DWAV, USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_480E) },
> -       { HID_USB_DEVICE(USB_VENDOR_ID_DWAV, USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_720C) },
> -       { HID_USB_DEVICE(USB_VENDOR_ID_DWAV, USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7224) },
> -       { HID_USB_DEVICE(USB_VENDOR_ID_DWAV, USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_725E) },
> -       { HID_USB_DEVICE(USB_VENDOR_ID_DWAV, USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_726B) },
> -       { HID_USB_DEVICE(USB_VENDOR_ID_DWAV, USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72A1) },
> -       { HID_USB_DEVICE(USB_VENDOR_ID_DWAV, USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7302) },
> -       { HID_USB_DEVICE(USB_VENDOR_ID_DWAV, USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_A001) },
>        { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ELECOM, USB_DEVICE_ID_ELECOM_BM084) },
> -       { HID_USB_DEVICE(USB_VENDOR_ID_ELO, USB_DEVICE_ID_ELO_TS2515) },
>        { HID_USB_DEVICE(USB_VENDOR_ID_EMS, USB_DEVICE_ID_EMS_TRIO_LINKER_PLUS_II) },
>        { HID_USB_DEVICE(USB_VENDOR_ID_EZKEY, USB_DEVICE_ID_BTC_8193) },
> -       { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_FRUCTEL, USB_DEVICE_ID_GAMETEL_MT_MODE) },
>        { HID_USB_DEVICE(USB_VENDOR_ID_GAMERON, USB_DEVICE_ID_GAMERON_DUAL_PSX_ADAPTOR) },
>        { HID_USB_DEVICE(USB_VENDOR_ID_GAMERON, USB_DEVICE_ID_GAMERON_DUAL_PCS_ADAPTOR) },
> -       { HID_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH, USB_DEVICE_ID_GENERAL_TOUCH_WIN7_TWOFINGERS) },
> -       { HID_USB_DEVICE(USB_VENDOR_ID_GOODTOUCH, USB_DEVICE_ID_GOODTOUCH_000f) },
>        { HID_USB_DEVICE(USB_VENDOR_ID_GREENASIA, 0x0003) },
>        { HID_USB_DEVICE(USB_VENDOR_ID_GREENASIA, 0x0012) },
>        { HID_USB_DEVICE(USB_VENDOR_ID_GYRATION, USB_DEVICE_ID_GYRATION_REMOTE) },
>        { HID_USB_DEVICE(USB_VENDOR_ID_GYRATION, USB_DEVICE_ID_GYRATION_REMOTE_2) },
>        { HID_USB_DEVICE(USB_VENDOR_ID_GYRATION, USB_DEVICE_ID_GYRATION_REMOTE_3) },
> -       { HID_USB_DEVICE(USB_VENDOR_ID_HANVON, USB_DEVICE_ID_HANVON_MULTITOUCH) },
> -       { HID_USB_DEVICE(USB_VENDOR_ID_HANVON_ALT, USB_DEVICE_ID_HANVON_ALT_MULTITOUCH) },
> -       { HID_USB_DEVICE(USB_VENDOR_ID_IDEACOM, USB_DEVICE_ID_IDEACOM_IDC6650) },
>        { HID_USB_DEVICE(USB_VENDOR_ID_HOLTEK, USB_DEVICE_ID_HOLTEK_ON_LINE_GRIP) },
> -       { HID_USB_DEVICE(USB_VENDOR_ID_ILITEK, USB_DEVICE_ID_ILITEK_MULTITOUCH) },
> -       { HID_USB_DEVICE(USB_VENDOR_ID_IRTOUCHSYSTEMS, USB_DEVICE_ID_IRTOUCH_INFRARED_USB) },
>        { HID_USB_DEVICE(USB_VENDOR_ID_KENSINGTON, USB_DEVICE_ID_KS_SLIMBLADE) },
>        { HID_USB_DEVICE(USB_VENDOR_ID_KEYTOUCH, USB_DEVICE_ID_KEYTOUCH_IEC) },
>        { HID_USB_DEVICE(USB_VENDOR_ID_KYE, USB_DEVICE_ID_KYE_ERGO_525V) },
> @@ -1563,7 +1530,6 @@ static const struct hid_device_id hid_have_special_driver[] = {
>        { HID_USB_DEVICE(USB_VENDOR_ID_KYE, USB_DEVICE_ID_KYE_EASYPEN_M610X) },
>        { HID_USB_DEVICE(USB_VENDOR_ID_LABTEC, USB_DEVICE_ID_LABTEC_WIRELESS_KEYBOARD) },
>        { HID_USB_DEVICE(USB_VENDOR_ID_LCPOWER, USB_DEVICE_ID_LCPOWER_LC1000 ) },
> -       { HID_USB_DEVICE(USB_VENDOR_ID_LG, USB_DEVICE_ID_LG_MULTITOUCH) },
>        { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_MX3000_RECEIVER) },
>        { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_S510_RECEIVER) },
>        { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_S510_RECEIVER_2) },
> @@ -1596,8 +1562,6 @@ static const struct hid_device_id hid_have_special_driver[] = {
>        { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_RUMBLEPAD2) },
>        { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_SPACETRAVELLER) },
>        { HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_SPACENAVIGATOR) },
> -       { HID_USB_DEVICE(USB_VENDOR_ID_LUMIO, USB_DEVICE_ID_CRYSTALTOUCH) },
> -       { HID_USB_DEVICE(USB_VENDOR_ID_LUMIO, USB_DEVICE_ID_CRYSTALTOUCH_DUAL) },
>        { HID_USB_DEVICE(USB_VENDOR_ID_MICROCHIP, USB_DEVICE_ID_PICOLCD) },
>        { HID_USB_DEVICE(USB_VENDOR_ID_MICROCHIP, USB_DEVICE_ID_PICOLCD_BOOTLOADER) },
>        { HID_USB_DEVICE(USB_VENDOR_ID_MICROSOFT, USB_DEVICE_ID_MS_COMFORT_MOUSE_4500) },
> @@ -1629,15 +1593,8 @@ static const struct hid_device_id hid_have_special_driver[] = {
>        { HID_USB_DEVICE(USB_VENDOR_ID_NTRIG, USB_DEVICE_ID_NTRIG_TOUCH_SCREEN_18) },
>        { HID_USB_DEVICE(USB_VENDOR_ID_ORTEK, USB_DEVICE_ID_ORTEK_PKB1700) },
>        { HID_USB_DEVICE(USB_VENDOR_ID_ORTEK, USB_DEVICE_ID_ORTEK_WKB2000) },
> -       { HID_USB_DEVICE(USB_VENDOR_ID_PANASONIC, USB_DEVICE_ID_PANABOARD_UBT780) },
> -       { HID_USB_DEVICE(USB_VENDOR_ID_PANASONIC, USB_DEVICE_ID_PANABOARD_UBT880) },
> -       { HID_USB_DEVICE(USB_VENDOR_ID_PENMOUNT, USB_DEVICE_ID_PENMOUNT_PCI) },
>        { HID_USB_DEVICE(USB_VENDOR_ID_PETALYNX, USB_DEVICE_ID_PETALYNX_MAXTER_REMOTE) },
> -       { HID_USB_DEVICE(USB_VENDOR_ID_PIXART, USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN) },
> -       { HID_USB_DEVICE(USB_VENDOR_ID_PIXART, USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN1) },
> -       { HID_USB_DEVICE(USB_VENDOR_ID_PIXART, USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN2) },
>        { HID_USB_DEVICE(USB_VENDOR_ID_PRIMAX, USB_DEVICE_ID_PRIMAX_KEYBOARD) },
> -       { HID_USB_DEVICE(USB_VENDOR_ID_QUANTA, USB_DEVICE_ID_QUANTA_OPTICAL_TOUCH) },
>        { HID_USB_DEVICE(USB_VENDOR_ID_QUANTA, USB_DEVICE_ID_PIXART_IMAGING_INC_OPTICAL_TOUCH_SCREEN) },
>        { HID_USB_DEVICE(USB_VENDOR_ID_ROCCAT, USB_DEVICE_ID_ROCCAT_KONE) },
>        { HID_USB_DEVICE(USB_VENDOR_ID_ROCCAT, USB_DEVICE_ID_ROCCAT_ARVO) },
> @@ -1654,9 +1611,6 @@ static const struct hid_device_id hid_have_special_driver[] = {
>        { HID_USB_DEVICE(USB_VENDOR_ID_SONY, USB_DEVICE_ID_SONY_NAVIGATION_CONTROLLER) },
>        { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_SONY, USB_DEVICE_ID_SONY_PS3_CONTROLLER) },
>        { HID_USB_DEVICE(USB_VENDOR_ID_SONY, USB_DEVICE_ID_SONY_VAIO_VGX_MOUSE) },
> -       { HID_USB_DEVICE(USB_VENDOR_ID_STANTUM, USB_DEVICE_ID_MTP) },
> -       { HID_USB_DEVICE(USB_VENDOR_ID_STANTUM_STM, USB_DEVICE_ID_MTP_STM) },
> -       { HID_USB_DEVICE(USB_VENDOR_ID_STANTUM_SITRONIX, USB_DEVICE_ID_MTP_SITRONIX) },
>        { HID_USB_DEVICE(USB_VENDOR_ID_SUNPLUS, USB_DEVICE_ID_SUNPLUS_WDESKTOP) },
>        { HID_USB_DEVICE(USB_VENDOR_ID_THRUSTMASTER, 0xb300) },
>        { HID_USB_DEVICE(USB_VENDOR_ID_THRUSTMASTER, 0xb304) },
> @@ -1670,16 +1624,12 @@ static const struct hid_device_id hid_have_special_driver[] = {
>        { HID_USB_DEVICE(USB_VENDOR_ID_TIVO, USB_DEVICE_ID_TIVO_SLIDE) },
>        { HID_USB_DEVICE(USB_VENDOR_ID_TOPSEED, USB_DEVICE_ID_TOPSEED_CYBERLINK) },
>        { HID_USB_DEVICE(USB_VENDOR_ID_TOPSEED2, USB_DEVICE_ID_TOPSEED2_RF_COMBO) },
> -       { HID_USB_DEVICE(USB_VENDOR_ID_TOUCH_INTL, USB_DEVICE_ID_TOUCH_INTL_MULTI_TOUCH) },
>        { HID_USB_DEVICE(USB_VENDOR_ID_TWINHAN, USB_DEVICE_ID_TWINHAN_IR_REMOTE) },
> -       { HID_USB_DEVICE(USB_VENDOR_ID_TURBOX, USB_DEVICE_ID_TURBOX_TOUCHSCREEN_MOSART) },
>        { HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC, USB_DEVICE_ID_UCLOGIC_TABLET_PF1209) },
>        { HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC, USB_DEVICE_ID_UCLOGIC_TABLET_WP4030U) },
>        { HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC, USB_DEVICE_ID_UCLOGIC_TABLET_WP5540U) },
>        { HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC, USB_DEVICE_ID_UCLOGIC_TABLET_WP8060U) },
>        { HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC, USB_DEVICE_ID_UCLOGIC_TABLET_WP1062) },
> -       { HID_USB_DEVICE(USB_VENDOR_ID_UNITEC, USB_DEVICE_ID_UNITEC_USB_TOUCH_0709) },
> -       { HID_USB_DEVICE(USB_VENDOR_ID_UNITEC, USB_DEVICE_ID_UNITEC_USB_TOUCH_0A19) },
>        { HID_USB_DEVICE(USB_VENDOR_ID_WISEGROUP, USB_DEVICE_ID_SMARTJOY_PLUS) },
>        { HID_USB_DEVICE(USB_VENDOR_ID_WISEGROUP, USB_DEVICE_ID_SUPER_JOY_BOX_3) },
>        { HID_USB_DEVICE(USB_VENDOR_ID_WISEGROUP, USB_DEVICE_ID_DUAL_USB_JOYPAD) },
> @@ -1694,16 +1644,6 @@ static const struct hid_device_id hid_have_special_driver[] = {
>        { HID_USB_DEVICE(USB_VENDOR_ID_WALTOP, USB_DEVICE_ID_WALTOP_PID_0038) },
>        { HID_USB_DEVICE(USB_VENDOR_ID_WALTOP, USB_DEVICE_ID_WALTOP_MEDIA_TABLET_10_6_INCH) },
>        { HID_USB_DEVICE(USB_VENDOR_ID_WALTOP, USB_DEVICE_ID_WALTOP_MEDIA_TABLET_14_1_INCH) },
> -       { HID_USB_DEVICE(USB_VENDOR_ID_XAT, USB_DEVICE_ID_XAT_CSR) },
> -       { HID_USB_DEVICE(USB_VENDOR_ID_XIROKU, USB_DEVICE_ID_XIROKU_SPX) },
> -       { HID_USB_DEVICE(USB_VENDOR_ID_XIROKU, USB_DEVICE_ID_XIROKU_MPX) },
> -       { HID_USB_DEVICE(USB_VENDOR_ID_XIROKU, USB_DEVICE_ID_XIROKU_CSR) },
> -       { HID_USB_DEVICE(USB_VENDOR_ID_XIROKU, USB_DEVICE_ID_XIROKU_SPX1) },
> -       { HID_USB_DEVICE(USB_VENDOR_ID_XIROKU, USB_DEVICE_ID_XIROKU_MPX1) },
> -       { HID_USB_DEVICE(USB_VENDOR_ID_XIROKU, USB_DEVICE_ID_XIROKU_CSR1) },
> -       { HID_USB_DEVICE(USB_VENDOR_ID_XIROKU, USB_DEVICE_ID_XIROKU_SPX2) },
> -       { HID_USB_DEVICE(USB_VENDOR_ID_XIROKU, USB_DEVICE_ID_XIROKU_MPX2) },
> -       { HID_USB_DEVICE(USB_VENDOR_ID_XIROKU, USB_DEVICE_ID_XIROKU_CSR2) },
>        { HID_USB_DEVICE(USB_VENDOR_ID_X_TENSIONS, USB_DEVICE_ID_SPEEDLINK_VAD_CEZANNE) },
>        { HID_USB_DEVICE(USB_VENDOR_ID_ZEROPLUS, 0x0005) },
>        { HID_USB_DEVICE(USB_VENDOR_ID_ZEROPLUS, 0x0030) },
> @@ -1796,10 +1736,6 @@ static int hid_bus_match(struct device *dev, struct device_driver *drv)
>        struct hid_driver *hdrv = container_of(drv, struct hid_driver, driver);
>        struct hid_device *hdev = container_of(dev, struct hid_device, dev);
>
> -       if ((hdev->quirks & HID_QUIRK_MULTITOUCH) &&
> -               !strncmp(hdrv->name, "hid-multitouch", 14))
> -               return 1;
> -
>        return hid_match_device(hdev, hdrv) != NULL;
>  }
>
> @@ -1817,11 +1753,8 @@ static int hid_device_probe(struct device *dev)
>        if (!hdev->driver) {
>                id = hid_match_device(hdev, hdrv);
>                if (id == NULL) {
> -                       if (!((hdev->quirks & HID_QUIRK_MULTITOUCH) &&
> -                               !strncmp(hdrv->name, "hid-multitouch", 14))) {
> -                               ret = -ENODEV;
> -                               goto unlock;
> -                       }
> +                       ret = -ENODEV;
> +                       goto unlock;
>                }
>
>                hdev->driver = hdrv;
> diff --git a/drivers/hid/hid-input.c b/drivers/hid/hid-input.c
> index 002781c..7b43186 100644
> --- a/drivers/hid/hid-input.c
> +++ b/drivers/hid/hid-input.c
> @@ -638,10 +638,6 @@ 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;
> @@ -1208,13 +1204,6 @@ 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/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c
> index 1d5b941..125c1e7 100644
> --- a/drivers/hid/hid-multitouch.c
> +++ b/drivers/hid/hid-multitouch.c
> @@ -654,7 +654,6 @@ static int mt_probe(struct hid_device *hdev, const struct hid_device_id *id)
>         * that emit events over several HID messages.
>         */
>        hdev->quirks |= HID_QUIRK_NO_INPUT_SYNC;
> -       hdev->quirks &= ~HID_QUIRK_MULTITOUCH;
>
>        td = kzalloc(sizeof(struct mt_device), GFP_KERNEL);
>        if (!td) {
> @@ -999,6 +998,8 @@ static const struct hid_device_id mt_devices[] = {
>                HID_USB_DEVICE(USB_VENDOR_ID_XIROKU,
>                        USB_DEVICE_ID_XIROKU_CSR2) },
>
> +       /* Generic MT device */
> +       { HID_DEVICE(HID_BUS_ANY, HID_GROUP_MULTITOUCH, HID_ANY_ID, HID_ANY_ID) },
>        { }
>  };
>  MODULE_DEVICE_TABLE(hid, mt_devices);
> diff --git a/include/linux/hid.h b/include/linux/hid.h
> index dd694fb..2c7a195 100644
> --- a/include/linux/hid.h
> +++ b/include/linux/hid.h
> @@ -317,7 +317,6 @@ 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
> @@ -328,6 +327,7 @@ struct hid_item {
>  * HID device groups
>  */
>  #define HID_GROUP_GENERIC                      0x0001
> +#define HID_GROUP_MULTITOUCH                   0x0002
>
>  /*
>  * This is the global environment of the parser. This information is
> --
> 1.7.10
>
> --
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