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_ */