96 lines
3.4 KiB
C
96 lines
3.4 KiB
C
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/*
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* Interface to the 93C46 serial EEPROM that is used to store BIOS
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* settings for the aic7xxx based adaptec SCSI controllers. It can
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* also be used for 93C26 and 93C06 serial EEPROMS.
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*
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* Copyright (c) 1994, 1995 Justin T. Gibbs.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification, immediately at the beginning of the file.
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* 2. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* Where this Software is combined with software released under the terms of
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* the GNU Public License ("GPL") and the terms of the GPL would require the
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* combined work to also be released under the terms of the GPL, the terms
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* and conditions of this License will apply in addition to those of the
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* GPL with the exception of any terms or conditions of this License that
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* conflict with, or are expressly prohibited by, the GPL.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $Id$
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*/
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#include <sys/param.h>
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#if !defined(__NetBSD__)
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#include <sys/systm.h>
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#endif
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#ifdef KERNEL
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typedef enum {
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C46 = 6,
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C56_66 = 8
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} seeprom_chip_t;
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struct seeprom_descriptor {
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bus_space_tag_t sd_tag;
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bus_space_handle_t sd_bsh;
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bus_size_t sd_control_offset;
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bus_size_t sd_status_offset;
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bus_size_t sd_dataout_offset;
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seeprom_chip_t sd_chip;
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u_int16_t sd_MS;
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u_int16_t sd_RDY;
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u_int16_t sd_CS;
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u_int16_t sd_CK;
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u_int16_t sd_DO;
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u_int16_t sd_DI;
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};
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/*
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* This function will read count 16-bit words from the serial EEPROM and
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* return their value in buf. The port address of the aic7xxx serial EEPROM
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* control register is passed in as offset. The following parameters are
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* also passed in:
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*
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* CS - Chip select
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* CK - Clock
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* DO - Data out
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* DI - Data in
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* RDY - SEEPROM ready
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* MS - Memory port mode select
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*
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* A failed read attempt returns 0, and a successful read returns 1.
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*/
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#define SEEPROM_INB(sd) \
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bus_space_read_1(sd->sd_tag, sd->sd_bsh, sd->sd_control_offset)
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#define SEEPROM_OUTB(sd, value) \
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bus_space_write_1(sd->sd_tag, sd->sd_bsh, sd->sd_control_offset, value)
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#define SEEPROM_STATUS_INB(sd) \
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bus_space_read_1(sd->sd_tag, sd->sd_bsh, sd->sd_status_offset)
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#define SEEPROM_DATA_INB(sd) \
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bus_space_read_1(sd->sd_tag, sd->sd_bsh, sd->sd_dataout_offset)
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int read_seeprom(struct seeprom_descriptor *sd, u_int16_t *buf,
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bus_size_t start_addr, bus_size_t count);
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#endif /* KERNEL */
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