diff options
| author | Jiri Kosina <jkosina@suse.cz> | 2009-11-05 14:08:03 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-01-28 15:01:20 -0800 |
| commit | 001252f8ea9e1ce2e376d515d410c23d932b5a31 (patch) | |
| tree | dcd80fdcc3f3092fa951fe3b84778b1c19820580 | |
| parent | 5e057878f946d25bf3a3bc811f4e27099f41c24f (diff) | |
HID: fixup quirk for NCR devices
commit 5b915d9e6dc3d22fedde91dfef1cb1a8fa9a1870 upstream.
NCR devices are terminally broken by design -- they claim themselves to contain
proper input applications in their HID report descriptor, but behave very badly
if treated in standard way.
According to NCR developers, the devices get confused when queried for reports
in a standard way, rendering them unusable.
NCR is shipping application called "RPSL" that can be used to drive these
devices through hiddev, under the assumption that in-kernel driver doesn't
perform initial report query.
If it does, neither in-kernel nor hiddev-based driver can operate with these
devices any more.
Introduce a quirk that skips the report query for all NCR devices. The previous
NOGET quirk was wrong and had been introduced because I misunderstood the nature
of brokenness of these devices.
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -rw-r--r-- | drivers/hid/usbhid/hid-core.c | 3 | ||||
| -rw-r--r-- | drivers/hid/usbhid/hid-quirks.c | 2 | ||||
| -rw-r--r-- | include/linux/hid.h | 1 |
3 files changed, 4 insertions, 2 deletions
diff --git a/drivers/hid/usbhid/hid-core.c b/drivers/hid/usbhid/hid-core.c index 03bd703255a3..5d901f698838 100644 --- a/drivers/hid/usbhid/hid-core.c +++ b/drivers/hid/usbhid/hid-core.c @@ -998,7 +998,8 @@ static int usbhid_start(struct hid_device *hid) usbhid->urbctrl->transfer_dma = usbhid->ctrlbuf_dma; usbhid->urbctrl->transfer_flags |= (URB_NO_TRANSFER_DMA_MAP | URB_NO_SETUP_DMA_MAP); - usbhid_init_reports(hid); + if (!(hid->quirks & HID_QUIRK_NO_INIT_REPORTS)) + usbhid_init_reports(hid); set_bit(HID_STARTED, &usbhid->iofl); diff --git a/drivers/hid/usbhid/hid-quirks.c b/drivers/hid/usbhid/hid-quirks.c index 0d9045aa2c4b..5713b93e76cb 100644 --- a/drivers/hid/usbhid/hid-quirks.c +++ b/drivers/hid/usbhid/hid-quirks.c @@ -280,7 +280,7 @@ u32 usbhid_lookup_quirk(const u16 idVendor, const u16 idProduct) if (idVendor == USB_VENDOR_ID_NCR && idProduct >= USB_DEVICE_ID_NCR_FIRST && idProduct <= USB_DEVICE_ID_NCR_LAST) - return HID_QUIRK_NOGET; + return HID_QUIRK_NO_INIT_REPORTS; down_read(&dquirks_rwsem); bl_entry = usbhid_exists_dquirk(idVendor, idProduct); diff --git a/include/linux/hid.h b/include/linux/hid.h index 10f628416740..87093652dda8 100644 --- a/include/linux/hid.h +++ b/include/linux/hid.h @@ -312,6 +312,7 @@ struct hid_item { #define HID_QUIRK_MULTI_INPUT 0x00000040 #define HID_QUIRK_SKIP_OUTPUT_REPORTS 0x00010000 #define HID_QUIRK_FULLSPEED_INTERVAL 0x10000000 +#define HID_QUIRK_NO_INIT_REPORTS 0x20000000 /* * This is the global environment of the parser. This information is |