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/*
* Interface to the 93C46 serial EEPROM that is used to store BIOS
* settings for the aic7xxx based adaptec SCSI controllers. It can
* also be used for 93C26 and 93C06 serial EEPROMS.
*
* Copyright (c) 1994, 1995 Justin T. Gibbs.
* 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 immediately at the beginning of the file, without modification,
* 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.
* 3. Absolutely no warranty of function or purpose is made by the author
* Justin T. Gibbs.
* 4. Modifications may be freely made to this file if the above conditions
* are met.
*
* $Id$
*/
#include <sys/param.h>
#if !defined(__NetBSD__)
#include <sys/systm.h>
#endif
typedef enum {
C46 = 6,
C56_66 = 8
} seeprom_chip_t;
struct seeprom_descriptor {
#if defined(__FreeBSD__)
u_int32_t sd_iobase;
volatile u_int8_t *sd_maddr;
#elif defined(__NetBSD__)
bus_chipset_tag_t sd_bc;
bus_io_handle_t sd_ioh;
bus_io_size_t sd_offset;
#endif
seeprom_chip_t sd_chip;
u_int16_t sd_MS;
u_int16_t sd_RDY;
u_int16_t sd_CS;
u_int16_t sd_CK;
u_int16_t sd_DO;
u_int16_t sd_DI;
};
/*
* This function will read count 16-bit words from the serial EEPROM and
* return their value in buf. The port address of the aic7xxx serial EEPROM
* control register is passed in as offset. The following parameters are
* also passed in:
*
* CS - Chip select
* CK - Clock
* DO - Data out
* DI - Data in
* RDY - SEEPROM ready
* MS - Memory port mode select
*
* A failed read attempt returns 0, and a successful read returns 1.
*/
#if defined(__FreeBSD__)
#define SEEPROM_INB(sd) \
(((sd)->sd_maddr != NULL) ? \
*((sd)->sd_maddr) : \
inb((sd)->sd_iobase))
#define SEEPROM_OUTB(sd, value) \
(((sd)->sd_maddr != NULL) ? \
*((sd)->sd_maddr) = (value) : \
outb((sd)->sd_iobase, (value)))
#elif defined(__NetBSD__)
#define SEEPROM_INB(sd) \
bus_io_read_1(sd->sd_bc, sd->sd_ioh, sd->sd_offset)
#define SEEPROM_OUTB(sd, value) \
bus_io_write_1(sd->sd_bc, sd->sd_ioh, sd->sd_offset, value)
#endif
#if defined(__FreeBSD__)
int read_seeprom __P((struct seeprom_descriptor *sd,
u_int16_t *buf, u_int start_addr, u_int count));
#elif defined(__NetBSD__)
int read_seeprom __P((struct seeprom_descriptor *sd,
u_int16_t *buf, bus_io_size_t start_addr, bus_io_size_t count));
#endif
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