1 /*- 2 * Copyright (c) 1998 Nicolas Souchu 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 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. 13 * 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 24 * SUCH DAMAGE. 25 * 26 * $Id: iiconf.h,v 1.1.1.1 1998/09/03 20:51:50 nsouch Exp $ 27 */ 28 #ifndef __IICONF_H 29 #define __IICONF_H 30 31 #include <sys/queue.h> 32 33 #define IICPRI PZERO+8 /* XXX sleep/wakeup queue priority */ 34 35 #define n(flags) (~(flags) & (flags)) 36 37 #define LSB 0x1 38 39 /* 40 * How tsleep() is called in iic_request_bus(). 41 */ 42 #define IIC_DONTWAIT 0 43 #define IIC_NOINTR 0 44 #define IIC_WAIT 0x1 45 #define IIC_INTR 0x2 46 47 /* 48 * i2c modes 49 */ 50 #define IIC_MASTER 0x1 51 #define IIC_SLAVE 0x2 52 #define IIC_POLLED 0x4 53 54 /* 55 * i2c speed 56 */ 57 #define IIC_UNKNOWN 0x0 58 #define IIC_SLOW 0x1 59 #define IIC_FAST 0x2 60 #define IIC_FASTEST 0x3 61 62 #define IIC_LAST_READ 0x1 63 64 /* 65 * callback index 66 */ 67 #define IIC_REQUEST_BUS 0x1 68 #define IIC_RELEASE_BUS 0x2 69 70 /* 71 * interrupt events 72 */ 73 #define INTR_GENERAL 0x1 /* general call received */ 74 #define INTR_START 0x2 /* the I2C interface is addressed */ 75 #define INTR_STOP 0x3 /* stop condition received */ 76 #define INTR_RECEIVE 0x4 /* character received */ 77 #define INTR_TRANSMIT 0x5 /* character to transmit */ 78 #define INTR_ERROR 0x6 /* error */ 79 #define INTR_NOACK 0x7 /* no ack from master receiver */ 80 81 /* 82 * adapter layer errors 83 */ 84 #define IIC_NOERR 0x0 /* no error occured */ 85 #define IIC_EBUSERR 0x1 /* bus error */ 86 #define IIC_ENOACK 0x2 /* ack not received until timeout */ 87 #define IIC_ETIMEOUT 0x3 /* timeout */ 88 #define IIC_EBUSBSY 0x4 /* bus busy */ 89 #define IIC_ESTATUS 0x5 /* status error */ 90 #define IIC_EUNDERFLOW 0x6 /* slave ready for more data */ 91 #define IIC_EOVERFLOW 0x7 /* too much data */ 92 #define IIC_ENOTSUPP 0x8 /* request not supported */ 93 #define IIC_ENOADDR 0x9 /* no address assigned to the interface */ 94 95 /* 96 * ivars codes 97 */ 98 #define IICBUS_IVAR_ADDR 0x1 /* I2C address of the device */ 99 100 extern int iicbus_request_bus(device_t, device_t, int); 101 extern int iicbus_release_bus(device_t, device_t); 102 extern device_t iicbus_alloc_bus(device_t); 103 104 extern void iicbus_intr(device_t, int, char *); 105 106 extern int iicbus_null_repeated_start(device_t, u_char); 107 extern int iicbus_null_callback(device_t, int, caddr_t); 108 109 #define iicbus_repeated_start(bus,slave,timeout) \ 110 (IICBUS_REPEATED_START(device_get_parent(bus), slave, timeout)) 111 #define iicbus_start(bus,slave,timeout) \ 112 (IICBUS_START(device_get_parent(bus), slave, timeout)) 113 #define iicbus_stop(bus) \ 114 (IICBUS_STOP(device_get_parent(bus))) 115 #define iicbus_reset(bus,speed,addr,oldaddr) \ 116 (IICBUS_RESET(device_get_parent(bus), speed, addr, oldaddr)) 117 #define iicbus_write(bus,buf,len,sent,timeout) \ 118 (IICBUS_WRITE(device_get_parent(bus), buf, len, sent, timeout)) 119 #define iicbus_read(bus,buf,len,sent,last,delay) \ 120 (IICBUS_READ(device_get_parent(bus), buf, len, sent, last, delay)) 121 122 extern int iicbus_block_write(device_t, u_char, char *, int, int *); 123 extern int iicbus_block_read(device_t, u_char, char *, int, int *); 124 125 extern u_char iicbus_get_addr(device_t); 126 127 #endif 128