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authorMathieu Magnaudet <mathieu.magnaudet@gmail.com>2014-11-22 12:02:07 +0100
committerJiri Kosina <jkosina@suse.cz>2014-11-25 15:28:12 +0100
commitda10bc252476a8d1d1bdf7b94502ad2cbd7f30b1 (patch)
tree1e330d6c6951f843da9b4b073369536e934b4f4b
parent6b07974af9698225766d42175470b1a5d7bf9f48 (diff)
downloadlinux-da10bc252476a8d1d1bdf7b94502ad2cbd7f30b1.tar.gz
HID: multitouch: Add quirk for VTL touch panels
VTL panels do not switch to the multitouch mode until the input mode feature is read by the host. This should normally be done by usbhid, but it looks like an other bug prevents usbhid to properly retrieve the feature state. As a workaround, we force the reading of the feature in mt_set_input_mode for such devices. Reviewed-by: Benjamin Tissoires <benjamin.tissoires@redhat.com> Signed-off-by: Mathieu Magnaudet <mathieu.magnaudet@enac.fr> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
-rw-r--r--drivers/hid/hid-ids.h3
-rw-r--r--drivers/hid/hid-multitouch.c27
2 files changed, 30 insertions, 0 deletions
diff --git a/drivers/hid/hid-ids.h b/drivers/hid/hid-ids.h
index 7c863738e419..d6cc6a9cf10f 100644
--- a/drivers/hid/hid-ids.h
+++ b/drivers/hid/hid-ids.h
@@ -931,6 +931,9 @@
#define USB_DEVICE_ID_VERNIER_CYCLOPS 0x0004
#define USB_DEVICE_ID_VERNIER_LCSPEC 0x0006
+#define USB_VENDOR_ID_VTL 0x0306
+#define USB_DEVICE_ID_VTL_MULTITOUCH_FF3F 0xff3f
+
#define USB_VENDOR_ID_WACOM 0x056a
#define USB_DEVICE_ID_WACOM_GRAPHIRE_BLUETOOTH 0x81
#define USB_DEVICE_ID_WACOM_INTUOS4_BLUETOOTH 0x00BD
diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c
index 51e25b9407f2..683cda6c60ce 100644
--- a/drivers/hid/hid-multitouch.c
+++ b/drivers/hid/hid-multitouch.c
@@ -67,6 +67,7 @@ MODULE_LICENSE("GPL");
#define MT_QUIRK_IGNORE_DUPLICATES (1 << 10)
#define MT_QUIRK_HOVERING (1 << 11)
#define MT_QUIRK_CONTACT_CNT_ACCURATE (1 << 12)
+#define MT_QUIRK_FORCE_GET_FEATURE (1 << 13)
#define MT_INPUTMODE_TOUCHSCREEN 0x02
#define MT_INPUTMODE_TOUCHPAD 0x03
@@ -150,6 +151,7 @@ static void mt_post_parse(struct mt_device *td);
#define MT_CLS_FLATFROG 0x0107
#define MT_CLS_GENERALTOUCH_TWOFINGERS 0x0108
#define MT_CLS_GENERALTOUCH_PWT_TENFINGERS 0x0109
+#define MT_CLS_VTL 0x0110
#define MT_DEFAULT_MAXCONTACT 10
#define MT_MAX_MAXCONTACT 250
@@ -255,6 +257,11 @@ static struct mt_class mt_classes[] = {
.sn_move = 2048,
.maxcontacts = 40,
},
+ { .name = MT_CLS_VTL,
+ .quirks = MT_QUIRK_ALWAYS_VALID |
+ MT_QUIRK_CONTACT_CNT_ACCURATE |
+ MT_QUIRK_FORCE_GET_FEATURE,
+ },
{ }
};
@@ -809,6 +816,9 @@ static void mt_set_input_mode(struct hid_device *hdev)
struct mt_device *td = hid_get_drvdata(hdev);
struct hid_report *r;
struct hid_report_enum *re;
+ struct mt_class *cls = &td->mtclass;
+ char *buf;
+ int report_len;
if (td->inputmode < 0)
return;
@@ -816,6 +826,18 @@ static void mt_set_input_mode(struct hid_device *hdev)
re = &(hdev->report_enum[HID_FEATURE_REPORT]);
r = re->report_id_hash[td->inputmode];
if (r) {
+ if (cls->quirks & MT_QUIRK_FORCE_GET_FEATURE) {
+ report_len = ((r->size - 1) >> 3) + 1 + (r->id > 0);
+ buf = hid_alloc_report_buf(r, GFP_KERNEL);
+ if (!buf) {
+ hid_err(hdev, "failed to allocate buffer for report\n");
+ return;
+ }
+ hid_hw_raw_request(hdev, r->id, buf, report_len,
+ HID_FEATURE_REPORT,
+ HID_REQ_GET_REPORT);
+ kfree(buf);
+ }
r->field[0]->value[td->inputmode_index] = td->inputmode_value;
hid_hw_request(hdev, r, HID_REQ_SET_REPORT);
}
@@ -1281,6 +1303,11 @@ static const struct hid_device_id mt_devices[] = {
MT_USB_DEVICE(USB_VENDOR_ID_UNITEC,
USB_DEVICE_ID_UNITEC_USB_TOUCH_0A19) },
+ /* VTL panels */
+ { .driver_data = MT_CLS_VTL,
+ MT_USB_DEVICE(USB_VENDOR_ID_VTL,
+ USB_DEVICE_ID_VTL_MULTITOUCH_FF3F) },
+
/* Wistron panels */
{ .driver_data = MT_CLS_NSMU,
MT_USB_DEVICE(USB_VENDOR_ID_WISTRON,