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, immediately at the beginning of the file. 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 * Where this Software is combined with software released under the terms of 19 * the GNU Public License ("GPL") and the terms of the GPL would require the 20 * combined work to also be released under the terms of the GPL, the terms 21 * and conditions of this License will apply in addition to those of the 22 * GPL with the exception of any terms or conditions of this License that 23 * conflict with, or are expressly prohibited by, the GPL. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR 29 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 * 37 * $FreeBSD$ 38 */ 39 40 #include <sys/param.h> 41 #if !defined(__NetBSD__) 42 #include <sys/systm.h> 43 #endif 44 45 #ifdef KERNEL 46 47 typedef enum { 48 C46 = 6, 49 C56_66 = 8 50 } seeprom_chip_t; 51 52 struct seeprom_descriptor { 53 bus_space_tag_t sd_tag; 54 bus_space_handle_t sd_bsh; 55 bus_size_t sd_control_offset; 56 bus_size_t sd_status_offset; 57 bus_size_t sd_dataout_offset; 58 seeprom_chip_t sd_chip; 59 u_int16_t sd_MS; 60 u_int16_t sd_RDY; 61 u_int16_t sd_CS; 62 u_int16_t sd_CK; 63 u_int16_t sd_DO; 64 u_int16_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 bus_space_read_1(sd->sd_tag, sd->sd_bsh, sd->sd_control_offset) 85 #define SEEPROM_OUTB(sd, value) \ 86 bus_space_write_1(sd->sd_tag, sd->sd_bsh, sd->sd_control_offset, value) 87 #define SEEPROM_STATUS_INB(sd) \ 88 bus_space_read_1(sd->sd_tag, sd->sd_bsh, sd->sd_status_offset) 89 #define SEEPROM_DATA_INB(sd) \ 90 bus_space_read_1(sd->sd_tag, sd->sd_bsh, sd->sd_dataout_offset) 91 92 int read_seeprom(struct seeprom_descriptor *sd, u_int16_t *buf, 93 bus_size_t start_addr, bus_size_t count); 94 95 #endif /* KERNEL */ 96