text: /*-
   * Copyright (c) 1998 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 1.6 1999/08/28 00:41:59 peter Exp $
   */
  #ifndef __IICONF_H
  #define __IICONF_H
  
  #include <sys/queue.h>
  
  #define IICPRI (PZERO+8)		/* XXX sleep/wakeup queue priority */
  
  #define n(flags) (~(flags) & (flags))
  
  #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 */
  
  /*
   * ivars codes
   */
  #define IICBUS_IVAR_ADDR	0x1	/* I2C address of the device */
  
  extern int iicbus_request_bus(device_t, device_t, int);
  extern int iicbus_release_bus(device_t, device_t);
  extern device_t iicbus_alloc_bus(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, 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 *);
  
  extern u_char iicbus_get_addr(device_t);
  
  #endif
  