FreeBSD/Linux Kernel Cross Reference
sys/dev/aic7xxx/aic7xxx_93cx6.h

     /*-
      * Interface to the 93C46/56 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.
      *
      * SPDX-License-Identifier: BSD-3-Clause
      *
      * Copyright (c) 1994, 1995, 2000 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. Redistributions in binary form must reproduce at minimum a disclaimer
     *    substantially similar to the "NO WARRANTY" disclaimer below
     *    ("Disclaimer") and any redistribution must be conditioned upon
     *    including a substantially similar Disclaimer requirement for further
     *    binary redistribution.
     * 3. Neither the names of the above-listed copyright holders nor the names
     *    of any contributors may 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
     * GNU General Public License ("GPL") version 2 as published by the Free
     * Software Foundation.
     *
     * NO WARRANTY
     * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
     * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     * HOLDERS OR CONTRIBUTORS BE LIABLE FOR 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 DAMAGES.
     *
     * $Id: //depot/aic7xxx/aic7xxx/aic7xxx_93cx6.h#12 $
     *
     * $FreeBSD$
     */
    #ifndef _AIC7XXX_93CX6_H_
    #define _AIC7XXX_93CX6_H_
    
    typedef enum {
            C46 = 6,
            C56_66 = 8
    } seeprom_chip_t;
    
    struct seeprom_descriptor {
            struct ahc_softc *sd_ahc;
            u_int sd_control_offset;
            u_int sd_status_offset;
            u_int sd_dataout_offset;
            seeprom_chip_t sd_chip;
            uint16_t sd_MS;
            uint16_t sd_RDY;
            uint16_t sd_CS;
            uint16_t sd_CK;
            uint16_t sd_DO;
            uint16_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) \
            ahc_inb(sd->sd_ahc, sd->sd_control_offset)
    #define SEEPROM_OUTB(sd, value)                                 \
    do {                                                            \
            ahc_outb(sd->sd_ahc, sd->sd_control_offset, value);     \
            ahc_flush_device_writes(sd->sd_ahc);                    \
    } while(0)
    
    #define SEEPROM_STATUS_INB(sd) \
            ahc_inb(sd->sd_ahc, sd->sd_status_offset)
    #define SEEPROM_DATA_INB(sd) \
            ahc_inb(sd->sd_ahc, sd->sd_dataout_offset)
    
    int ahc_read_seeprom(struct seeprom_descriptor *sd, uint16_t *buf,
                         u_int start_addr, u_int count);
   int ahc_write_seeprom(struct seeprom_descriptor *sd, uint16_t *buf,
                         u_int start_addr, u_int count);
   int ahc_verify_cksum(struct seeprom_config *sc);
   
   #endif /* _AIC7XXX_93CX6_H_ */

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