xref: /linux/drivers/scsi/aic7xxx/aic7xxx_93cx6.h (revision e5451c8f8330e03ad3cfa16048b4daf961af434f)
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_ */
103