2 # Copyright (c) 2019 Vladimir Kondratyev
4 # Redistribution and use in source and binary forms, with or without
5 # modification, are permitted provided that the following conditions
7 # 1. Redistributions of source code must retain the above copyright
8 # notice, this list of conditions and the following disclaimer.
9 # 2. Redistributions in binary form must reproduce the above copyright
10 # notice, this list of conditions and the following disclaimer in the
11 # documentation and/or other materials provided with the distribution.
13 # THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
14 # ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
16 # ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
17 # FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
18 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
19 # OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
20 # HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
21 # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
22 # OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 #include <sys/param.h>
30 #include <sys/kernel.h>
31 #include <sys/malloc.h>
32 #include <dev/hid/hid.h>
34 # Any function listed here can do unbound sleeps waiting for IO to complete.
38 # Interrupts interface
41 # Allocate memory and initialise interrupt transfers.
42 # intr callback function which is called if input data is available.
43 # context is the private softc pointer, which will be used to callback.
44 # rdesc is pointer to structire containing requested maximal sizes of input,
45 # output and feature reports. It is used by hardware transport drivers
46 # to determine sizes of internal buffers.
47 # This function can be subsequently called with intr parameter set to NULL
48 # to request intr_poll method support for transport driver.
50 METHOD void intr_setup {
54 struct hid_rdesc_info *rdesc;
58 # Release all allocated resources associated with interrupt transfers.
60 METHOD void intr_unsetup {
65 # Start the interrupt transfers if not already started.
67 METHOD int intr_start {
72 # Stop the interrupt transfers if not already stopped.
74 METHOD int intr_stop {
79 # The following function gets called from the HID keyboard driver when
80 # the system has panicked. intr_setup method with NULL passed as intr parameter
81 # must be called once before to let transport driver to be prepared.
83 METHOD void intr_poll {
90 # Read out an report descriptor from the HID device.
92 METHOD int get_rdesc {
99 # Get input data from the device. Data should be read in chunks
100 # of the size prescribed by the report descriptor.
101 # This function interferes with interrupt transfers and should not be used.
111 # Send data to the device. Data should be written in
112 # chunks of the size prescribed by the report descriptor.
121 # Get a report from the device without waiting for data on the interrupt.
122 # Copies a maximum of len bytes of the report data into the memory specified
123 # by data. Upon return actlen is set to the number of bytes copied. The type
124 # field indicates which report is requested. It should be HID_INPUT_REPORT,
125 # HID_OUTPUT_REPORT, or HID_FEATURE_REPORT. This call may fail if the device
126 # does not support this feature.
128 METHOD int get_report {
138 # Set a report in the device. The type field indicates which report is to be
139 # set. It should be HID_INPUT_REPORT, HID_OUTPUT_REPORT, or HID_FEATURE_REPORT.
140 # The value of the report is specified by the data and the len fields.
141 # This call may fail if the device does not support this feature.
143 METHOD int set_report {
152 # Set duration between input reports (in mSec).
154 METHOD int set_idle {
161 # Switch between the boot protocol and the report protocol (or vice versa).
163 METHOD int set_protocol {
169 # Executes arbitrary transport backend command.
170 # Format of command is defined by hardware transport driver.