The tool works nicely with hid-generic, but it ends up creating 9 different input nodes with most of them only having ABS_MISC set.
Filter the axis out, which reduces the amount of devices to 2. One is the proper System Multi-axis collection, the other exported device seems to provide SLEEP and POWER Key, not sure how one can trigger those events though. Filtering the ABS_X and ABS_Y axes also prevents udev to detect this as a touchscreen. Signed-off-by: Benjamin Tissoires <[email protected]> --- no changes in v2 --- drivers/hid/hid-microsoft.c | 49 +++++++++++++++++++++++++++++++++++++++------ 1 file changed, 43 insertions(+), 6 deletions(-) diff --git a/drivers/hid/hid-microsoft.c b/drivers/hid/hid-microsoft.c index 96e7d3231d2f..72d983626afd 100644 --- a/drivers/hid/hid-microsoft.c +++ b/drivers/hid/hid-microsoft.c @@ -22,12 +22,13 @@ #include "hid-ids.h" -#define MS_HIDINPUT 0x01 -#define MS_ERGONOMY 0x02 -#define MS_PRESENTER 0x04 -#define MS_RDESC 0x08 -#define MS_NOGET 0x10 -#define MS_DUPLICATE_USAGES 0x20 +#define MS_HIDINPUT BIT(0) +#define MS_ERGONOMY BIT(1) +#define MS_PRESENTER BIT(2) +#define MS_RDESC BIT(3) +#define MS_NOGET BIT(4) +#define MS_DUPLICATE_USAGES BIT(5) +#define MS_SURFACE_DIAL BIT(6) static __u8 *ms_report_fixup(struct hid_device *hdev, __u8 *rdesc, unsigned int *rsize) @@ -130,6 +131,30 @@ static int ms_presenter_8k_quirk(struct hid_input *hi, struct hid_usage *usage, return 1; } +static int ms_surface_dial_quirk(struct hid_input *hi, struct hid_field *field, + struct hid_usage *usage, unsigned long **bit, int *max) +{ + switch (usage->hid & HID_USAGE_PAGE) { + case 0xff070000: + /* fall-through */ + case HID_UP_DIGITIZER: + /* ignore those axis */ + return -1; + case HID_UP_GENDESK: + switch (usage->hid) { + case HID_GD_X: + /* fall-through */ + case HID_GD_Y: + /* fall-through */ + case HID_GD_RFKILL_BTN: + /* ignore those axis */ + return -1; + } + } + + return 0; +} + static int ms_input_mapping(struct hid_device *hdev, struct hid_input *hi, struct hid_field *field, struct hid_usage *usage, unsigned long **bit, int *max) @@ -146,6 +171,13 @@ static int ms_input_mapping(struct hid_device *hdev, struct hid_input *hi, ms_presenter_8k_quirk(hi, usage, bit, max)) return 1; + if (quirks & MS_SURFACE_DIAL) { + int ret = ms_surface_dial_quirk(hi, field, usage, bit, max); + + if (ret) + return ret; + } + return 0; } @@ -229,6 +261,9 @@ static int ms_probe(struct hid_device *hdev, const struct hid_device_id *id) if (quirks & MS_NOGET) hdev->quirks |= HID_QUIRK_NOGET; + if (quirks & MS_SURFACE_DIAL) + hdev->quirks |= HID_QUIRK_INPUT_PER_APP; + ret = hid_parse(hdev); if (ret) { hid_err(hdev, "parse failed\n"); @@ -281,6 +316,8 @@ static const struct hid_device_id ms_devices[] = { { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_MICROSOFT, USB_DEVICE_ID_MS_PRESENTER_8K_BT), .driver_data = MS_PRESENTER }, + { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_MICROSOFT, 0x091B), + .driver_data = MS_SURFACE_DIAL }, { } }; MODULE_DEVICE_TABLE(hid, ms_devices); -- 2.14.3
