2 # Copyright (c) 1998 Nicolas Souchu
5 # Redistribution and use in source and binary forms, with or without
6 # modification, are permitted provided that the following conditions
8 # 1. Redistributions of source code must retain the above copyright
9 # notice, this list of conditions and the following disclaimer.
10 # 2. Redistributions in binary form must reproduce the above copyright
11 # notice, this list of conditions and the following disclaimer in the
12 # documentation and/or other materials provided with the distribution.
14 # THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 # ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 # ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 # FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 # OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 # HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 # OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 #include <dev/iicbus/iic.h>
36 iicbus_default_frequency(device_t bus, u_char speed)
54 # Request ownership of bus
55 # index: IIC_REQUEST_BUS or IIC_RELEASE_BUS
56 # data: pointer to int containing IIC_WAIT or IIC_DONTWAIT and either IIC_INTR or IIC_NOINTR
57 # This function is allowed to sleep if *data contains IIC_WAIT.
66 # Send REPEATED_START condition
68 METHOD int repeated_start {
75 # Send START condition
103 # Write to the I2C bus
124 # Generalized Read/Write interface
126 METHOD int transfer {
128 struct iic_msg *msgs;
133 # Return the frequency in Hz for the bus running at the given
134 # symbolic speed. Only the IIC_SLOW speed has meaning, it is always
135 # 100KHz. The UNKNOWN, FAST, and FASTEST rates all map to the
136 # configured bus frequency, or 100KHz when not otherwise configured.
138 METHOD u_int get_frequency {
141 } DEFAULT iicbus_default_frequency;