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[man] Get uhid(4) man page in sync with current API

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API documented in previous version of uhid(4) man page has been obsolete
since May 2009 when old USB stack was replaced with USB2 implentation.
Current API has the same set of ioctl calls but uses usb_gen_descriptor
structure to pass data to/from kernel.

MFC after:	1 week
This commit is contained in:
Oleksandr Tymoshenko 2018-07-01 22:48:00 +00:00
parent 9fe7e0020a
commit 5f88cf68fc
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=335854
1 changed files with 32 additions and 15 deletions
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47
share/man/man4/uhid.4
View File

@ -29,7 +29,7 @@
.\"
.\" $FreeBSD$
.\"
.Dd April 24, 2018
.Dd July 1, 2018
.Dt UHID 4
.Os
.Sh NAME
@ -61,17 +61,28 @@ calls:
.Bl -tag -width indent
.It Dv USB_GET_REPORT_ID Pq Vt int
Get the report identifier used by this HID report.
.It Dv USB_GET_REPORT_DESC Pq Vt "struct usb_ctl_report_desc"
.It Dv USB_GET_REPORT_DESC Pq Vt "struct usb_gen_descriptor"
Get the HID report descriptor.
Copies a maximum of
.Va ugd_maxlen
bytes of the report descriptor data into the memory
specified by
.Va ugd_data .
Upon return
.Va ugd_actlen
is set to the number of bytes copied.
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.
.Bd -literal
struct usb_ctl_report_desc {
int ucrd_size;
u_char ucrd_data[1024]; /* filled data size will vary */
struct usb_gen_descriptor {
void *ugd_data;
uint16_t ugd_maxlen;
uint16_t ugd_actlen;
uint8_t ugd_report_type;
...
};
.Ed
.It Dv USB_SET_IMMED Pq Vt int
@ -85,11 +96,18 @@ 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.
.It Dv USB_GET_REPORT Pq Vt "struct usb_ctl_report"
.It Dv USB_GET_REPORT Pq Vt "struct usb_gen_descriptor"
Get a report from the device without waiting for data on
the interrupt pipe.
Copies a maximum of
.Va ugd_maxlen
bytes of the report data into the memory specified by
.Va ugd_data .
Upon return
.Va ugd_actlen
is set to the number of bytes copied.
The
.Va report
.Va ugd_report_type
field indicates which report is requested.
It should be
.Dv UHID_INPUT_REPORT ,
@ -97,22 +115,21 @@ It should be
or
.Dv UHID_FEATURE_REPORT .
This call may fail if the device does not support this feature.
.Bd -literal
struct usb_ctl_report {
int ucr_report;
u_char ucr_data[1024]; /* used data size will vary */
};
.Ed
.It Dv USB_SET_REPORT Pq Vt "struct usb_ctl_report"
.It Dv USB_SET_REPORT Pq Vt "struct usb_gen_descriptor"
Set a report in the device.
The
.Va report
.Va ugd_report_type
field indicates which report is to be set.
It should be
.Dv UHID_INPUT_REPORT ,
.Dv UHID_OUTPUT_REPORT ,
or
.Dv UHID_FEATURE_REPORT .
The value of the report is specified by the
.Va ugd_data
and the
.Va ugd_maxlen
fields.
This call may fail if the device does not support this feature.
.El
.Pp