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. 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 * 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 * $Id: //depot/src/aic7xxx/aic7xxx_93cx6.h#5 $ 34 * 35 * $FreeBSD$ 36 */ 37 #ifndef _AIC7XXX_93CX6_H_ 38 #define _AIC7XXX_93CX6_H_ 39 40 typedef enum { 41 C46 = 6, 42 C56_66 = 8 43 } seeprom_chip_t; 44 45 struct seeprom_descriptor { 46 struct ahc_softc *sd_ahc; 47 u_int sd_control_offset; 48 u_int sd_status_offset; 49 u_int sd_dataout_offset; 50 seeprom_chip_t sd_chip; 51 uint16_t sd_MS; 52 uint16_t sd_RDY; 53 uint16_t sd_CS; 54 uint16_t sd_CK; 55 uint16_t sd_DO; 56 uint16_t sd_DI; 57 }; 58 59 /* 60 * This function will read count 16-bit words from the serial EEPROM and 61 * return their value in buf. The port address of the aic7xxx serial EEPROM 62 * control register is passed in as offset. The following parameters are 63 * also passed in: 64 * 65 * CS - Chip select 66 * CK - Clock 67 * DO - Data out 68 * DI - Data in 69 * RDY - SEEPROM ready 70 * MS - Memory port mode select 71 * 72 * A failed read attempt returns 0, and a successful read returns 1. 73 */ 74 75 #define SEEPROM_INB(sd) \ 76 ahc_inb(sd->sd_ahc, sd->sd_control_offset) 77 #define SEEPROM_OUTB(sd, value) \ 78 do { \ 79 ahc_outb(sd->sd_ahc, sd->sd_control_offset, value); \ 80 ahc_flush_device_writes(sd->sd_ahc); \ 81 } while(0) 82 83 #define SEEPROM_STATUS_INB(sd) \ 84 ahc_inb(sd->sd_ahc, sd->sd_status_offset) 85 #define SEEPROM_DATA_INB(sd) \ 86 ahc_inb(sd->sd_ahc, sd->sd_dataout_offset) 87 88 int read_seeprom(struct seeprom_descriptor *sd, uint16_t *buf, 89 u_int start_addr, u_int count); 90 int verify_cksum(struct seeprom_config *sc); 91 92 #endif /* _AIC7XXX_93CX6_H_ */ 93