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authorBenjamin Tissoires <benjamin.tissoires@redhat.com>2015-05-01 16:22:45 -0400
committerJiri Kosina <jkosina@suse.cz>2015-05-07 10:28:11 +0200
commit181a8b911dd26cd44dc7283d7953a2e138842767 (patch)
tree88079bf0e5eb46ae0afaa57e926e6fcb093cf985 /drivers/hid/hid-lenovo.c
parentd92189ebbdcd0eb180317d8cd6d46c57ac9a3dc0 (diff)
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HID: lenovo: add support for Lenovo ThinkPad Keyboard Pro unit
This dock is used with the Thinkpad Helix 2 but suffers from an error in the report descriptor where an usage max is 65535. Add a report fixup for it and make the keyboard working. Tested-by: Jonathan Oppenheim <lejono@gmail.com> Tested-by: John Reid <owlman.lists@gmail.com> Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'drivers/hid/hid-lenovo.c')
-rw-r--r--drivers/hid/hid-lenovo.c31
1 files changed, 31 insertions, 0 deletions
diff --git a/drivers/hid/hid-lenovo.c b/drivers/hid/hid-lenovo.c
index 78608d646007..4e291d5ad645 100644
--- a/drivers/hid/hid-lenovo.c
+++ b/drivers/hid/hid-lenovo.c
@@ -43,6 +43,35 @@ struct lenovo_drvdata_cptkbd {
#define map_key_clear(c) hid_map_usage_clear(hi, usage, bit, max, EV_KEY, (c))
+static const __u8 lenovo_pro_dock_need_fixup_collection[] = {
+ 0x05, 0x88, /* Usage Page (Vendor Usage Page 0x88) */
+ 0x09, 0x01, /* Usage (Vendor Usage 0x01) */
+ 0xa1, 0x01, /* Collection (Application) */
+ 0x85, 0x04, /* Report ID (4) */
+ 0x19, 0x00, /* Usage Minimum (0) */
+ 0x2a, 0xff, 0xff, /* Usage Maximum (65535) */
+};
+
+static __u8 *lenovo_report_fixup(struct hid_device *hdev, __u8 *rdesc,
+ unsigned int *rsize)
+{
+ switch (hdev->product) {
+ case USB_DEVICE_ID_LENOVO_TPPRODOCK:
+ /* the fixups that need to be done:
+ * - get a reasonable usage max for the vendor collection
+ * 0x8801 from the report ID 4
+ */
+ if (*rsize >= 153 &&
+ memcmp(&rdesc[140], lenovo_pro_dock_need_fixup_collection,
+ sizeof(lenovo_pro_dock_need_fixup_collection)) == 0) {
+ rdesc[151] = 0x01;
+ rdesc[152] = 0x00;
+ }
+ break;
+ }
+ return rdesc;
+}
+
static int lenovo_input_mapping_tpkbd(struct hid_device *hdev,
struct hid_input *hi, struct hid_field *field,
struct hid_usage *usage, unsigned long **bit, int *max)
@@ -784,6 +813,7 @@ static const struct hid_device_id lenovo_devices[] = {
{ HID_USB_DEVICE(USB_VENDOR_ID_LENOVO, USB_DEVICE_ID_LENOVO_TPKBD) },
{ HID_USB_DEVICE(USB_VENDOR_ID_LENOVO, USB_DEVICE_ID_LENOVO_CUSBKBD) },
{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_LENOVO, USB_DEVICE_ID_LENOVO_CBTKBD) },
+ { HID_USB_DEVICE(USB_VENDOR_ID_LENOVO, USB_DEVICE_ID_LENOVO_TPPRODOCK) },
{ }
};
@@ -797,6 +827,7 @@ static struct hid_driver lenovo_driver = {
.probe = lenovo_probe,
.remove = lenovo_remove,
.raw_event = lenovo_raw_event,
+ .report_fixup = lenovo_report_fixup,
};
module_hid_driver(lenovo_driver);