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authorBenjamin Tissoires <benjamin.tissoires@enac.fr>2012-03-06 17:57:04 +0100
committerJiri Kosina <jkosina@suse.cz>2012-03-12 11:27:07 +0100
commit8d179a9ef25a64b451e2bbd46f6a6c16c6a72eb1 (patch)
tree0085e1c271a4795447120dbc488b524aa93d229e /drivers/hid
parented9d5c96147b3bed6178252e8e04b27b7d32edd0 (diff)
downloadlinux-8d179a9ef25a64b451e2bbd46f6a6c16c6a72eb1.tar.bz2
HID: handle all multitouch devices through hid-multitouch
When the quirk HID_QUIRK_MULTITOUCH is present and when hid-multitouch is loaded, let's pass the device to hid-multitouch even if it has not been registered in hid-multitouch. If any other driver wants to take precedence over hid-multitouch, the usual way of adding it to hid_have_special_driver will work as the quirk HID_QUIRK_MULTITOUCH won't be set by the generic hid layer. Signed-off-by: Benjamin Tissoires <benjamin.tissoires@enac.fr> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'drivers/hid')
-rw-r--r--drivers/hid/hid-core.c12
-rw-r--r--drivers/hid/hid-multitouch.c11
2 files changed, 16 insertions, 7 deletions
diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c
index 4f4143cc789b..05a0c9a35bf2 100644
--- a/drivers/hid/hid-core.c
+++ b/drivers/hid/hid-core.c
@@ -1232,7 +1232,6 @@ int hid_connect(struct hid_device *hdev, unsigned int connect_mask)
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;
}
@@ -1667,6 +1666,10 @@ 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;
+
if (!hid_match_device(hdev, hdrv))
return 0;
@@ -1691,8 +1694,11 @@ static int hid_device_probe(struct device *dev)
if (!hdev->driver) {
id = hid_match_device(hdev, hdrv);
if (id == NULL) {
- ret = -ENODEV;
- goto unlock;
+ if (!((hdev->quirks & HID_QUIRK_MULTITOUCH) &&
+ !strncmp(hdrv->name, "hid-multitouch", 14))) {
+ ret = -ENODEV;
+ goto unlock;
+ }
}
hdev->driver = hdrv;
diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c
index 2088ab4e5db5..a61ba42e1bff 100644
--- a/drivers/hid/hid-multitouch.c
+++ b/drivers/hid/hid-multitouch.c
@@ -637,10 +637,12 @@ static int mt_probe(struct hid_device *hdev, const struct hid_device_id *id)
struct mt_device *td;
struct mt_class *mtclass = mt_classes; /* MT_CLS_DEFAULT */
- for (i = 0; mt_classes[i].name ; i++) {
- if (id->driver_data == mt_classes[i].name) {
- mtclass = &(mt_classes[i]);
- break;
+ if (id) {
+ for (i = 0; mt_classes[i].name ; i++) {
+ if (id->driver_data == mt_classes[i].name) {
+ mtclass = &(mt_classes[i]);
+ break;
+ }
}
}
@@ -648,6 +650,7 @@ 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) {