aic7xxx_93cx6.h revision 56980 
1/*
2 * Interface to the 93C46 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 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. The name of the author may not be used to endorse or promote products
16 *    derived from this software without specific prior written permission.
17 *
18 * Alternatively, this software may be distributed under the terms of the
19 * the GNU Public License ("GPL").
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
25 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 * $FreeBSD: head/sys/dev/aic7xxx/aic7xxx_93cx6.h 56980 2000-02-03 16:54:11Z gibbs $
34 */
35
36#include <sys/param.h>
37#if !defined(__NetBSD__)
38#include <sys/systm.h>
39#endif
40
41#ifdef _KERNEL
42
43typedef enum {
44	C46 = 6,
45	C56_66 = 8
46} seeprom_chip_t;
47
48struct seeprom_descriptor {
49	bus_space_tag_t sd_tag;
50	bus_space_handle_t sd_bsh;
51	bus_size_t sd_control_offset;
52	bus_size_t sd_status_offset;
53	bus_size_t sd_dataout_offset;
54	seeprom_chip_t sd_chip;
55	u_int16_t sd_MS;
56	u_int16_t sd_RDY;
57	u_int16_t sd_CS;
58	u_int16_t sd_CK;
59	u_int16_t sd_DO;
60	u_int16_t sd_DI;
61};
62
63/*
64 * This function will read count 16-bit words from the serial EEPROM and
65 * return their value in buf.  The port address of the aic7xxx serial EEPROM
66 * control register is passed in as offset.  The following parameters are
67 * also passed in:
68 *
69 *   CS  - Chip select
70 *   CK  - Clock
71 *   DO  - Data out
72 *   DI  - Data in
73 *   RDY - SEEPROM ready
74 *   MS  - Memory port mode select
75 *
76 *  A failed read attempt returns 0, and a successful read returns 1.
77 */
78
79#define	SEEPROM_INB(sd) \
80	bus_space_read_1(sd->sd_tag, sd->sd_bsh, sd->sd_control_offset)
81#define	SEEPROM_OUTB(sd, value) \
82	bus_space_write_1(sd->sd_tag, sd->sd_bsh, sd->sd_control_offset, value)
83#define	SEEPROM_STATUS_INB(sd) \
84	bus_space_read_1(sd->sd_tag, sd->sd_bsh, sd->sd_status_offset)
85#define	SEEPROM_DATA_INB(sd) \
86	bus_space_read_1(sd->sd_tag, sd->sd_bsh, sd->sd_dataout_offset)
87
88int read_seeprom(struct seeprom_descriptor *sd, u_int16_t *buf,
89		 bus_size_t start_addr, bus_size_t count);
90
91#endif /* _KERNEL */
92