hid_ioctl method executes arbitrary transport backend command.
Format of the command is defined by hardware transport driver.
It is intended to assist HID device drivers to execute non-HID commands
on hybrid devices like Elan and Apple touchpads which can be switched
between HID and proprietary modes.
MFC after: 2 month
Add bus_topo_assert() and implmement it as GIANT_REQUIRED for the
moment. This will allow us to change more easily to a newbus-specific
lock int he future.
Sponsored by: Netflix
Reviewed by: wulf, mav, jhb
Differential Revision: https://reviews.freebsd.org/D31833
Now that the upper layers all go through a layer to tie into these
information functions that translates an sbuf into char * and len. The
current interface suffers issues of what to do in cases of truncation,
etc. Instead, migrate all these functions to using struct sbuf and these
issues go away. The caller is also in charge of any memory allocation
and/or expansion that's needed during this process.
Create a bus_generic_child_{pnpinfo,location} and make it default. It
just returns success. This is for those busses that have no information
for these items. Migrate the now-empty routines to using this as
appropriate.
Document these new interfaces with man pages, and oversight from before.
Reviewed by: jhb, bcr
Sponsored by: Netflix
Differential Revision: https://reviews.freebsd.org/D29937
The second set of USB transfer is requested by hkbd(4) and
should improve HID keyboard handling in kdb and panic contexts.
MFC after: 1 week
Reviewed by: hselasky
Differential revision: https://reviews.freebsd.org/D30486
This change implements hid_if.m methods for HID-over-USB protocol [1].
Also, this change adds USBHID_ENABLED kernel option which changes
device_probe() priority and adds/removes PnP records to prefer usbhid
over ums, ukbd, wmt and other USB HID device drivers and vice-versa.
The module is based on uhid(4) driver. It is disabled by default for
now due to conflicts with existing USB HID drivers.
[1] https://www.usb.org/sites/default/files/hid1_11.pdf
Reviewed by: hselasky
Differential revision: https://reviews.freebsd.org/D27893
This driver provides support for multiple HID driver attachments
to single HID transport backend. This ability existed in Net/OpenBSD
(uhidev and ihidev drivers) but has never been ported to FreeBSD.
Unlike Net/OpenBSD we do not use report number alone to distinct report
source but we follow MS way and use a top level collection (TLC) usage
index that report belongs to as a location key.
The driver performs child device autodiscovery based on HID report
descriptor data, proxying of HID requests from child devices to parent
transport backends and broadcasting of interrupts in backward direction.
Differential revision: https://reviews.freebsd.org/D27888
