From 042628abd59c9a034797bd3083f806fa17cda62d Mon Sep 17 00:00:00 2001 From: Jason Gerecke Date: Thu, 30 Apr 2015 17:51:54 -0700 Subject: HID: wacom: Discover device_type from HID descriptor for all devices Currently, we assume a device_type of BTN_TOOL_PEN before scanning the HID descriptor and then change the device_type if what we discover proves that assumption wrong. This way of doing things makes it more difficult to figure out if a device (particularly a HID_GENERIC device) actually does tablet/touch input or is something completley different. This patch leaves device_type at its initial value of 0 and then calls 'wacom_parse_hid' for every device (not just those that have touch). As we map the usages, we can set the device_type as before. After we're finished, we can then check if the value is still zero and do whatever is most appropriate. Detecting the pen can be a little tricky on most Wacom devices because the descriptors describe opaque blobs. Fortunately, older Wacom tablets have the HID_DG_DIGITIZER usage on the pen's application collection and newer tablets seem to have a similar vendor-defined usage that we can trigger on. Signed-off-by: Jason Gerecke Reviewed-by: Ping Cheng Reviewed-by: Benjamin Tissoires Signed-off-by: Jiri Kosina --- drivers/hid/wacom_wac.h | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) (limited to 'drivers/hid/wacom_wac.h') diff --git a/drivers/hid/wacom_wac.h b/drivers/hid/wacom_wac.h index f5a5f686bc98..9a5ee623cb44 100644 --- a/drivers/hid/wacom_wac.h +++ b/drivers/hid/wacom_wac.h @@ -72,10 +72,14 @@ #define WACOM_QUIRK_MONITOR 0x0004 #define WACOM_QUIRK_BATTERY 0x0008 +#define WACOM_VENDORDEFINED_PEN 0xff0d0001 + #define WACOM_PEN_FIELD(f) (((f)->logical == HID_DG_STYLUS) || \ ((f)->physical == HID_DG_STYLUS) || \ ((f)->physical == HID_DG_PEN) || \ - ((f)->application == HID_DG_PEN)) + ((f)->application == HID_DG_PEN) || \ + ((f)->application == HID_DG_DIGITIZER) || \ + ((f)->application == WACOM_VENDORDEFINED_PEN)) #define WACOM_FINGER_FIELD(f) (((f)->logical == HID_DG_FINGER) || \ ((f)->physical == HID_DG_FINGER) || \ ((f)->application == HID_DG_TOUCHSCREEN)) -- cgit v1.2.3