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/* $Id$
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 1992 - 1997, 2000 Silicon Graphics, Inc.
* Copyright (C) 2000 by Colin Ngam
*/
#ifndef _ASM_SN_KSYS_I2C_H
#define _ASM_SN_KSYS_I2C_H
#if _STANDALONE
# include "rtc.h"
#else
# define rtc_time() (GET_LOCAL_RTC * NSEC_PER_CYCLE / 1000)
# define rtc_sleep us_delay
# define rtc_time_t uint64_t
#endif
typedef u_char i2c_addr_t; /* 7-bit address */
int i2c_init(nasid_t);
int i2c_probe(nasid_t nasid, rtc_time_t timeout);
int i2c_arb(nasid_t, rtc_time_t timeout, rtc_time_t *token_start);
int i2c_master_xmit(nasid_t,
i2c_addr_t addr,
u_char *buf,
int len_max,
int *len_ptr,
rtc_time_t timeout,
int only_if_message);
int i2c_master_recv(nasid_t,
i2c_addr_t addr,
u_char *buf,
int len_max,
int *len_ptr,
int emblen,
rtc_time_t timeout,
int only_if_message);
int i2c_master_xmit_recv(nasid_t,
i2c_addr_t addr,
u_char *xbuf,
int xlen_max,
int *xlen_ptr,
u_char *rbuf,
int rlen_max,
int *rlen_ptr,
int emblen,
rtc_time_t timeout,
int only_if_message);
char *i2c_errmsg(int code);
/*
* Error codes
*/
#define I2C_ERROR_NONE 0
#define I2C_ERROR_INIT -1 /* Initialization error */
#define I2C_ERROR_STATE -2 /* Unexpected chip state */
#define I2C_ERROR_NAK -3 /* Addressed slave not responding */
#define I2C_ERROR_TO_ARB -4 /* Timeout waiting for sysctlr arb */
#define I2C_ERROR_TO_BUSY -5 /* Timeout waiting for busy bus */
#define I2C_ERROR_TO_SENDA -6 /* Timeout sending address byte */
#define I2C_ERROR_TO_SENDD -7 /* Timeout sending data byte */
#define I2C_ERROR_TO_RECVA -8 /* Timeout receiving address byte */
#define I2C_ERROR_TO_RECVD -9 /* Timeout receiving data byte */
#define I2C_ERROR_NO_MESSAGE -10 /* No message was waiting */
#define I2C_ERROR_NO_ELSC -11 /* ELSC is disabled for access */
#endif /* _ASM_SN_KSYS_I2C_H */
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