Normally the uhid driver is used when no other HID driver attaches to a device. If ``flags 1'' is specified, the uhid driver will instead attach with a very high priority and always be used. Together with the vendor and product locators on the uhidev(4) driver this can be used to force the uhid driver to be used for a certain device.
The device handles the following ioctl(2) calls:
USB_GET_REPORT_ID
(int)
USB_GET_REPORT_DESC
(struct
usb_ctl_report_desc)
struct usb_ctl_report_desc {
int ucrd_size;
u_char ucrd_data[1024]; /* filled data size will vary */
};
USB_SET_IMMED
(int)
USB_GET_REPORT
(struct
usb_ctl_report)
report
field indicates which report is requested.
It should be
UHID_INPUT_REPORT
,
UHID_OUTPUT_REPORT
,
or
UHID_FEATURE_REPORT
.
This call may fail if the device does not support this feature.
struct usb_ctl_report {
int ucr_report;
u_char ucr_data[1024]; /* used data size will vary */
};
USB_SET_REPORT
(struct
usb_ctl_report)
report
field indicates which report is to be set.
It should be
UHID_INPUT_REPORT
,
UHID_OUTPUT_REPORT
,
or
UHID_FEATURE_REPORT
.
This call may fail if the device does not support this feature.
USB_GET_DEVICEINFO
(struct
usb_device_info)
USB_GET_STRING_DESC
(struct
usb_string_desc)
struct usb_string_desc {
int usd_string_index;
int usd_language_id;
usb_string_descriptor_t usd_desc;
};
Use read(2) to get data from the device. Data should be read in chunks of the size prescribed by the report descriptor.
Use write(2) send data to the device. Data should be written in chunks of the size prescribed by the report descriptor.
/dev/uhid?
USB_GET_DEVICEINFO
and
USB_GET_STRING_DESC
ioctls appeared in
NetBSD2.0.