92 lines
3.0 KiB
C
92 lines
3.0 KiB
C
/*
|
|
* 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.
|
|
* 2. The name of the author may not be used to endorse or promote products
|
|
* derived from this software without specific prior written permission.
|
|
*
|
|
* Alternatively, this software may be distributed under the terms of the
|
|
* the GNU Public License ("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.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#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 */
|