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      1 /*	$NetBSD: smc93cx6var.h,v 1.9 2005/12/11 12:21:28 christos Exp $	*/
      2 
      3 /*
      4  * Interface to the 93C46 serial EEPROM that is used to store BIOS
      5  * settings for the aic7xxx based adaptec SCSI controllers.  It can
      6  * also be used for 93C26 and 93C06 serial EEPROMS.
      7  *
      8  * Copyright (c) 1994, 1995 Justin T. Gibbs.
      9  * All rights reserved.
     10  *
     11  * Redistribution and use in source and binary forms, with or without
     12  * modification, are permitted provided that the following conditions
     13  * are met:
     14  * 1. Redistributions of source code must retain the above copyright
     15  *    notice, this list of conditions, and the following disclaimer,
     16  *    without modification.
     17  * 2. The name of the author may not be used to endorse or promote products
     18  *    derived from this software without specific prior written permission.
     19  *
     20  * Alternatively, this software may be distributed under the terms of the
     21  * the GNU Public License ("GPL").
     22  *
     23  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     26  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
     27  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     33  * SUCH DAMAGE.
     34  *
     35  * $FreeBSD: src/sys/dev/aic7xxx/aic7xxx.c,v 1.40 2000/01/07 23:08:17 gibbs Exp $
     36  */
     37 
     38 #include <sys/param.h>
     39 #if !defined(__NetBSD__)
     40 #include <sys/systm.h>
     41 #endif
     42 
     43 typedef enum {
     44 	C46 = 6,
     45 	C56_66 = 8
     46 } seeprom_chip_t;
     47 
     48 struct seeprom_descriptor {
     49 	bus_space_tag_t sd_tag;
     50 	bus_space_handle_t sd_bsh;
     51 	bus_size_t sd_regsize;
     52 	bus_size_t sd_control_offset;
     53 	bus_size_t sd_status_offset;
     54 	bus_size_t sd_dataout_offset;
     55 	seeprom_chip_t sd_chip;
     56 	u_int32_t sd_MS;
     57 	u_int32_t sd_RDY;
     58 	u_int32_t sd_CS;
     59 	u_int32_t sd_CK;
     60 	u_int32_t sd_DO;
     61 	u_int32_t sd_DI;
     62 };
     63 
     64 /*
     65  * This function will read count 16-bit words from the serial EEPROM and
     66  * return their value in buf.  The port address of the aic7xxx serial EEPROM
     67  * control register is passed in as offset.  The following parameters are
     68  * also passed in:
     69  *
     70  *   CS  - Chip select
     71  *   CK  - Clock
     72  *   DO  - Data out
     73  *   DI  - Data in
     74  *   RDY - SEEPROM ready
     75  *   MS  - Memory port mode select
     76  *
     77  *  A failed read attempt returns 0, and a successful read returns 1.
     78  */
     79 
     80 /* XXX bus barriers */
     81 #define SEEPROM_INB(sd) \
     82 	(((sd)->sd_regsize == 4) \
     83 	    ? bus_space_read_4((sd)->sd_tag, (sd)->sd_bsh, \
     84 	          (sd)->sd_control_offset) \
     85 	    : bus_space_read_1((sd)->sd_tag, (sd)->sd_bsh, \
     86 	          (sd)->sd_control_offset))
     87 
     88 #define SEEPROM_OUTB(sd, value) do { \
     89 	if ((sd)->sd_regsize == 4) \
     90 		bus_space_write_4((sd)->sd_tag, (sd)->sd_bsh, \
     91 		    (sd)->sd_control_offset, (value)); \
     92 	else \
     93 		bus_space_write_1((sd)->sd_tag, (sd)->sd_bsh, \
     94 		    (sd)->sd_control_offset, (u_int8_t) (value)); \
     95 } while (0)
     96 
     97 #define SEEPROM_STATUS_INB(sd) \
     98 	(((sd)->sd_regsize == 4) \
     99 	    ? bus_space_read_4((sd)->sd_tag, (sd)->sd_bsh, \
    100 	          (sd)->sd_status_offset) \
    101 	    : bus_space_read_1((sd)->sd_tag, (sd)->sd_bsh, \
    102 	          (sd)->sd_status_offset))
    103 
    104 #define SEEPROM_DATA_INB(sd) \
    105 	(((sd)->sd_regsize == 4) \
    106 	    ? bus_space_read_4((sd)->sd_tag, (sd)->sd_bsh, \
    107 	          (sd)->sd_dataout_offset) \
    108 	    : bus_space_read_1((sd)->sd_tag, (sd)->sd_bsh, \
    109 	          (sd)->sd_dataout_offset))
    110 
    111 int read_seeprom(struct seeprom_descriptor *, u_int16_t *,
    112     bus_size_t, bus_size_t);
    113