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
31 #include <sys/queue.h>
33 #define SMBPRI (PZERO+8) /* XXX sleep/wakeup queue priority */
35 #define n(flags) (~(flags) & (flags))
37 /* Order constants for smbus children. */
38 #define SMBUS_ORDER_HINTED 20
39 #define SMBUS_ORDER_PNP 40
42 * How tsleep() is called in smb_request_bus().
44 #define SMB_DONTWAIT 0
52 #define SMB_REQUEST_BUS 0x1
53 #define SMB_RELEASE_BUS 0x2
58 #define SMB_ENOERR 0x0
59 #define SMB_EBUSERR 0x1
60 #define SMB_ENOTSUPP 0x2
61 #define SMB_ENOACK 0x4
62 #define SMB_ECOLLI 0x8
63 #define SMB_EABORT 0x10
64 #define SMB_ETIMEOUT 0x20
65 #define SMB_EBUSY 0x40
66 #define SMB_EINVAL 0x100
69 * How Quick command is executed
71 #define SMB_QWRITE 0x0
78 SMBUS_IVAR_ADDR, /* slave address of the device */
81 int smbus_request_bus(device_t, device_t, int);
82 int smbus_release_bus(device_t, device_t);
83 device_t smbus_alloc_bus(device_t);
84 int smbus_error(int error);
86 void smbus_intr(device_t, u_char, char low, char high, int error);
88 #define SMBUS_ACCESSOR(var, ivar, type) \
89 __BUS_ACCESSOR(smbus, var, SMBUS, ivar, type)
91 SMBUS_ACCESSOR(addr, ADDR, int)
95 extern driver_t smbus_driver;
96 extern devclass_t smbus_devclass;
98 #define smbus_quick(bus,slave,how) \
99 (SMBUS_QUICK(device_get_parent(bus), slave, how))
100 #define smbus_sendb(bus,slave,byte) \
101 (SMBUS_SENDB(device_get_parent(bus), slave, byte))
102 #define smbus_recvb(bus,slave,byte) \
103 (SMBUS_RECVB(device_get_parent(bus), slave, byte))
104 #define smbus_writeb(bus,slave,cmd,byte) \
105 (SMBUS_WRITEB(device_get_parent(bus), slave, cmd, byte))
106 #define smbus_writew(bus,slave,cmd,word) \
107 (SMBUS_WRITEW(device_get_parent(bus), slave, cmd, word))
108 #define smbus_readb(bus,slave,cmd,byte) \
109 (SMBUS_READB(device_get_parent(bus), slave, cmd, byte))
110 #define smbus_readw(bus,slave,cmd,word) \
111 (SMBUS_READW(device_get_parent(bus), slave, cmd, word))
112 #define smbus_pcall(bus,slave,cmd,sdata,rdata) \
113 (SMBUS_PCALL(device_get_parent(bus), slave, cmd, sdata, rdata))
114 #define smbus_bwrite(bus,slave,cmd,count,buf) \
115 (SMBUS_BWRITE(device_get_parent(bus), slave, cmd, count, buf))
116 #define smbus_bread(bus,slave,cmd,count,buf) \
117 (SMBUS_BREAD(device_get_parent(bus), slave, cmd, count, buf))
119 #define SMBUS_MODVER 1
120 #define SMBUS_MINVER 1
121 #define SMBUS_MAXVER 1
122 #define SMBUS_PREFVER SMBUS_MODVER