PenMount USB resistive touchscreen reports it has three buttons, while in reality
it doesn't have any and doesn't support active styli, and only generates touch
events.
Signed-off-by: Andrew Shadura <andrew.shadura@xxxxxxxxxxxxxxx>
---
drivers/hid/hid-penmount.c | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)
diff --git a/drivers/hid/hid-penmount.c b/drivers/hid/hid-penmount.c
index c11dce8..98ea1c12 100644
--- a/drivers/hid/hid-penmount.c
+++ b/drivers/hid/hid-penmount.c
@@ -30,6 +30,23 @@ static int penmount_input_mapping(struct hid_device *hdev,
return 0;
}
+static __u8 *penmount_report_fixup(struct hid_device *hdev, __u8 *rdesc,
+ unsigned int *rsize)
+{
+ if (*rsize == 76 &&
+ rdesc[2] == 0x09 && rdesc[3] == 0x02 /* mouse */ &&
+ rdesc[22] == 0x05 && rdesc[23] == 0x09 /* button */ &&
+ rdesc[26] == 0x29 && rdesc[27] == 0x03 /* maximum */ &&
+ rdesc[32] == 0x95 && rdesc[33] == 0x02 /* report count */) {
+ hid_info(hdev,
+ "fixing up PenMount USB touchscreen report descriptor\n");
+
+ rdesc[27] = 0x01; /* just one button */
+ rdesc[33] = 0x01; /* just one report */
+ }
+ return rdesc;
+}
+
static const struct hid_device_id penmount_devices[] = {
{ HID_USB_DEVICE(USB_VENDOR_ID_PENMOUNT, USB_DEVICE_ID_PENMOUNT_6000) },
{ }
@@ -39,6 +56,7 @@ MODULE_DEVICE_TABLE(hid, penmount_devices);
static struct hid_driver penmount_driver = {
.name = "hid-penmount",
.id_table = penmount_devices,
+ .report_fixup = penmount_report_fixup,
.input_mapping = penmount_input_mapping,
};
--
2.1.4
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