sys/bus/iicbus/iiconf.h

root/sys/bus/iicbus/iiconf.h
/*-
 * Copyright (c) 1998, 2001 Nicolas Souchu
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * $FreeBSD: src/sys/dev/iicbus/iiconf.h,v 1.11 2006/12/05 06:19:36 imp Exp $
 * $DragonFly: src/sys/bus/iicbus/iiconf.h,v 1.4 2003/11/14 21:46:17 daver Exp $
 */
#ifndef __IICONF_H
#define __IICONF_H

#include <sys/queue.h>
#include <bus/iicbus/iic.h>


#define IICPRI (PZERO+8)                /* XXX sleep/wakeup queue priority */

#define LSB 0x1

/*
 * How tsleep() is called in iic_request_bus().
 */
#define IIC_DONTWAIT    0
#define IIC_NOINTR      0
#define IIC_WAIT        0x1
#define IIC_INTR        0x2

/*
 * i2c modes
 */
#define IIC_MASTER      0x1
#define IIC_SLAVE       0x2
#define IIC_POLLED      0x4

/*
 * i2c speed
 */
#define IIC_UNKNOWN     0x0
#define IIC_SLOW        0x1
#define IIC_FAST        0x2
#define IIC_FASTEST     0x3

#define IIC_LAST_READ   0x1

/*
 * callback index
 */
#define IIC_REQUEST_BUS 0x1
#define IIC_RELEASE_BUS 0x2

/*
 * interrupt events
 */
#define INTR_GENERAL    0x1     /* general call received */
#define INTR_START      0x2     /* the I2C interface is addressed */
#define INTR_STOP       0x3     /* stop condition received */
#define INTR_RECEIVE    0x4     /* character received */
#define INTR_TRANSMIT   0x5     /* character to transmit */
#define INTR_ERROR      0x6     /* error */
#define INTR_NOACK      0x7     /* no ack from master receiver */

/*
 * adapter layer errors
 */
#define IIC_NOERR       0x0     /* no error occured */
#define IIC_EBUSERR     0x1     /* bus error */
#define IIC_ENOACK      0x2     /* ack not received until timeout */
#define IIC_ETIMEOUT    0x3     /* timeout */
#define IIC_EBUSBSY     0x4     /* bus busy */
#define IIC_ESTATUS     0x5     /* status error */
#define IIC_EUNDERFLOW  0x6     /* slave ready for more data */
#define IIC_EOVERFLOW   0x7     /* too much data */
#define IIC_ENOTSUPP    0x8     /* request not supported */
#define IIC_ENOADDR     0x9     /* no address assigned to the interface */

extern int iicbus_request_bus(device_t, device_t, int);
extern int iicbus_release_bus(device_t, device_t);

extern void iicbus_intr(device_t, int, char *);

extern int iicbus_null_repeated_start(device_t, u_char);
extern int iicbus_null_callback(device_t, int, caddr_t);

#define iicbus_reset(bus,speed,addr,oldaddr) \
        (IICBUS_RESET(device_get_parent(bus), speed, addr, oldaddr))

/* basic I2C operations */
extern int iicbus_started(device_t);
extern int iicbus_start(device_t, u_char, int);
extern int iicbus_stop(device_t);
extern int iicbus_repeated_start(device_t, u_char, int);
extern int iicbus_write(device_t, const char *, int, int *, int);
extern int iicbus_read(device_t, char *, int, int *, int, int);

/* single byte read/write functions, start/stop not managed */
extern int iicbus_write_byte(device_t, char, int);
extern int iicbus_read_byte(device_t, char *, int);

/* Read/write operations with start/stop conditions managed */
extern int iicbus_block_write(device_t, u_char, char *, int, int *);
extern int iicbus_block_read(device_t, u_char, char *, int, int *);

/* vectors of iic operations to pass to bridge */
int iicbus_transfer(device_t bus, struct iic_msg *msgs, uint32_t nmsgs);
int iicbus_transfer_gen(device_t bus, struct iic_msg *msgs, uint32_t nmsgs);

#define IICBUS_MODVER   1
#define IICBUS_MINVER   1
#define IICBUS_MAXVER   1
#define IICBUS_PREFVER  IICBUS_MODVER

extern driver_t iicbb_driver;
extern devclass_t iicbb_devclass;

#define IICBB_MODVER    1
#define IICBB_MINVER    1
#define IICBB_MAXVER    1
#define IICBB_PREFVER   IICBB_MODVER

#endif
DragonflyBSD
