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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, this list of conditions, and the following disclaimer,
* without modification, immediately at the beginning of the file.
* 2. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* Where this Software is combined with software released under the terms of
* the GNU Public License ("GPL") and the terms of the GPL would require the
* combined work to also be released under the terms of the GPL, the terms
* and conditions of this License will apply in addition to those of the
* GPL with the exception of any terms or conditions of this License that
* conflict with, or are expressly prohibited by, the GPL.
*
* 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.
*
* $Id$
*/
#include <sys/param.h>
#if !defined(__NetBSD__)
#include <sys/systm.h>
#endif
#ifdef KERNEL
typedef enum {
C46 = 6,
C56_66 = 8
} seeprom_chip_t;
struct seeprom_descriptor {
bus_space_tag_t sd_tag;
bus_space_handle_t sd_bsh;
bus_size_t sd_control_offset;
bus_size_t sd_status_offset;
bus_size_t sd_dataout_offset;
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.
*/
#define SEEPROM_INB(sd) \
bus_space_read_1(sd->sd_tag, sd->sd_bsh, sd->sd_control_offset)
#define SEEPROM_OUTB(sd, value) \
bus_space_write_1(sd->sd_tag, sd->sd_bsh, sd->sd_control_offset, value)
#define SEEPROM_STATUS_INB(sd) \
bus_space_read_1(sd->sd_tag, sd->sd_bsh, sd->sd_status_offset)
#define SEEPROM_DATA_INB(sd) \
bus_space_read_1(sd->sd_tag, sd->sd_bsh, sd->sd_dataout_offset)
int read_seeprom(struct seeprom_descriptor *sd, u_int16_t *buf,
bus_size_t start_addr, bus_size_t count);
#endif /* KERNEL */
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