NAME
uhid —
USB generic HID support
SYNOPSIS
uhid* at uhidev? reportid ? flags N
DESCRIPTION
The
uhid driver provides support for all HID (Human Interface
Device) interfaces in USB devices that do not have a special driver.
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)
- Get the report identifier used by this HID report.
-
-
USB_GET_REPORT_DESC
(struct usb_ctl_report_desc)
- Get the HID report descriptor. Using this descriptor the
exact layout and meaning of data to/from the device can be found. The
report descriptor is delivered without any processing.
struct usb_ctl_report_desc {
int ucrd_size;
u_char ucrd_data[1024]; /* filled data size will vary */
};
-
-
USB_SET_IMMED
(int)
- Sets the device in a mode where each
read(2) will return the
current value of the input report. Normally a
read(2) will only return the
data that the device reports on its interrupt pipe. This call may fail if
the device does not support this feature.
-
-
USB_GET_REPORT
(struct usb_ctl_report)
- Get a report from the device without waiting for data on
the interrupt pipe. The
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)
- Set a report in the device. The
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_DEVICE_DESC
(usb_device_descriptor_t)
- Return the device descriptor.
-
-
USB_GET_DEVICEINFO
(struct usb_device_info)
- Get an information summary for the device. This call will
not issue any USB transactions.
-
-
USB_GET_STRING_DESC
(struct usb_string_desc)
- Get a string descriptor for the given language id and
string index.
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.
FILES
-
-
- /dev/uhid?
-
SEE ALSO
usbhidaction(1),
usbhidctl(1),
uhidev(4),
usb(4)
HISTORY
The
uhid driver appeared in
NetBSD
1.4. Support for the
USB_GET_DEVICEINFO
and
USB_GET_STRING_DESC
ioctls appeared in
NetBSD 2.0.