drivers/scsi/aic7xxx/aic7xxx_93cx6.h

   1 /*
   2  * Interface to the 93C46/56 serial EEPROM that is used to store BIOS
   3  * settings for the aic7xxx based adaptec SCSI controllers.  It can
   4  * also be used for 93C26 and 93C06 serial EEPROMS.
   5  *
   6  * Copyright (c) 1994, 1995, 2000 Justin T. Gibbs.
   7  * All rights reserved.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions, and the following disclaimer,
  14  *    without modification.
  15  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
  16  *    substantially similar to the "NO WARRANTY" disclaimer below
  17  *    ("Disclaimer") and any redistribution must be conditioned upon
  18  *    including a substantially similar Disclaimer requirement for further
  19  *    binary redistribution.
  20  * 3. Neither the names of the above-listed copyright holders nor the names
  21  *    of any contributors may be used to endorse or promote products derived
  22  *    from this software without specific prior written permission.
  23  *
  24  * Alternatively, this software may be distributed under the terms of the
  25  * GNU General Public License ("GPL") version 2 as published by the Free
  26  * Software Foundation.
  27  *
  28  * NO WARRANTY
  29  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  30  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  31  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
  32  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  33  * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  34  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  35  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  36  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  37  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  38  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  39  * POSSIBILITY OF SUCH DAMAGES.
  40  *
  41  * $Id: //depot/aic7xxx/aic7xxx/aic7xxx_93cx6.h#12 $
  42  *
  43  * $FreeBSD$
  44  */
  45 #ifndef _AIC7XXX_93CX6_H_
  46 #define _AIC7XXX_93CX6_H_
  47
  48 typedef enum {
  49         C46 = 6,
  50         C56_66 = 8
  51 } seeprom_chip_t;
  52
  53 struct seeprom_descriptor {
  54         struct ahc_softc *sd_ahc;
  55         u_int sd_control_offset;
  56         u_int sd_status_offset;
  57         u_int sd_dataout_offset;
  58         seeprom_chip_t sd_chip;
  59         uint16_t sd_MS;
  60         uint16_t sd_RDY;
  61         uint16_t sd_CS;
  62         uint16_t sd_CK;
  63         uint16_t sd_DO;
  64         uint16_t sd_DI;
  65 };
  66
  67 /*
  68  * This function will read count 16-bit words from the serial EEPROM and
  69  * return their value in buf.  The port address of the aic7xxx serial EEPROM
  70  * control register is passed in as offset.  The following parameters are
  71  * also passed in:
  72  *
  73  *   CS  - Chip select
  74  *   CK  - Clock
  75  *   DO  - Data out
  76  *   DI  - Data in
  77  *   RDY - SEEPROM ready
  78  *   MS  - Memory port mode select
  79  *
  80  *  A failed read attempt returns 0, and a successful read returns 1.
  81  */
  82
  83 #define SEEPROM_INB(sd) \
  84         ahc_inb(sd->sd_ahc, sd->sd_control_offset)
  85 #define SEEPROM_OUTB(sd, value)                                 \
  86 do {                                                            \
  87         ahc_outb(sd->sd_ahc, sd->sd_control_offset, value);     \
  88         ahc_flush_device_writes(sd->sd_ahc);                    \
  89 } while(0)
  90
  91 #define SEEPROM_STATUS_INB(sd) \
  92         ahc_inb(sd->sd_ahc, sd->sd_status_offset)
  93 #define SEEPROM_DATA_INB(sd) \
  94         ahc_inb(sd->sd_ahc, sd->sd_dataout_offset)
  95
  96 int ahc_read_seeprom(struct seeprom_descriptor *sd, uint16_t *buf,
  97                      u_int start_addr, u_int count);
  98 int ahc_write_seeprom(struct seeprom_descriptor *sd, uint16_t *buf,
  99                       u_int start_addr, u_int count);
 100 int ahc_verify_cksum(struct seeprom_config *sc);
 101
 102 #endif /* _AIC7XXX_93CX6_H_ */