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 * SPDX-License-Identifier: BSD-3-Clause 7 * 8 * Copyright (c) 1994, 1995, 2000 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. Redistributions in binary form must reproduce at minimum a disclaimer 18 * substantially similar to the "NO WARRANTY" disclaimer below 19 * ("Disclaimer") and any redistribution must be conditioned upon 20 * including a substantially similar Disclaimer requirement for further 21 * binary redistribution. 22 * 3. Neither the names of the above-listed copyright holders nor the names 23 * of any contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * Alternatively, this software may be distributed under the terms of the 27 * GNU General Public License ("GPL") version 2 as published by the Free 28 * Software Foundation. 29 * 30 * NO WARRANTY 31 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 32 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 33 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR 34 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 35 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 36 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 37 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 38 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 39 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 40 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 41 * POSSIBILITY OF SUCH DAMAGES. 42 * 43 * $Id: //depot/aic7xxx/aic7xxx/aic7xxx_93cx6.h#12 $ 44 * 45 * $FreeBSD$ 46 */ 47 #ifndef _AIC7XXX_93CX6_H_ 48 #define _AIC7XXX_93CX6_H_ 49 50 typedef enum { 51 C46 = 6, 52 C56_66 = 8 53 } seeprom_chip_t; 54 55 struct seeprom_descriptor { 56 struct ahc_softc *sd_ahc; 57 u_int sd_control_offset; 58 u_int sd_status_offset; 59 u_int sd_dataout_offset; 60 seeprom_chip_t sd_chip; 61 uint16_t sd_MS; 62 uint16_t sd_RDY; 63 uint16_t sd_CS; 64 uint16_t sd_CK; 65 uint16_t sd_DO; 66 uint16_t sd_DI; 67 }; 68 69 /* 70 * This function will read count 16-bit words from the serial EEPROM and 71 * return their value in buf. The port address of the aic7xxx serial EEPROM 72 * control register is passed in as offset. The following parameters are 73 * also passed in: 74 * 75 * CS - Chip select 76 * CK - Clock 77 * DO - Data out 78 * DI - Data in 79 * RDY - SEEPROM ready 80 * MS - Memory port mode select 81 * 82 * A failed read attempt returns 0, and a successful read returns 1. 83 */ 84 85 #define SEEPROM_INB(sd) \ 86 ahc_inb(sd->sd_ahc, sd->sd_control_offset) 87 #define SEEPROM_OUTB(sd, value) \ 88 do { \ 89 ahc_outb(sd->sd_ahc, sd->sd_control_offset, value); \ 90 ahc_flush_device_writes(sd->sd_ahc); \ 91 } while(0) 92 93 #define SEEPROM_STATUS_INB(sd) \ 94 ahc_inb(sd->sd_ahc, sd->sd_status_offset) 95 #define SEEPROM_DATA_INB(sd) \ 96 ahc_inb(sd->sd_ahc, sd->sd_dataout_offset) 97 98 int ahc_read_seeprom(struct seeprom_descriptor *sd, uint16_t *buf, 99 u_int start_addr, u_int count); 100 int ahc_write_seeprom(struct seeprom_descriptor *sd, uint16_t *buf, 101 u_int start_addr, u_int count); 102 int ahc_verify_cksum(struct seeprom_config *sc); 103 104 #endif /* _AIC7XXX_93CX6_H_ */ 105