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. 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 * the 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 * $FreeBSD$ 34 */ 35 36 #include <sys/param.h> 37 #if !defined(__NetBSD__) 38 #include <sys/systm.h> 39 #endif 40 41 #ifdef _KERNEL 42 43 typedef enum { 44 C46 = 6, 45 C56_66 = 8 46 } seeprom_chip_t; 47 48 struct seeprom_descriptor { 49 bus_space_tag_t sd_tag; 50 bus_space_handle_t sd_bsh; 51 bus_size_t sd_control_offset; 52 bus_size_t sd_status_offset; 53 bus_size_t sd_dataout_offset; 54 seeprom_chip_t sd_chip; 55 u_int16_t sd_MS; 56 u_int16_t sd_RDY; 57 u_int16_t sd_CS; 58 u_int16_t sd_CK; 59 u_int16_t sd_DO; 60 u_int16_t sd_DI; 61 }; 62 63 /* 64 * This function will read count 16-bit words from the serial EEPROM and 65 * return their value in buf. The port address of the aic7xxx serial EEPROM 66 * control register is passed in as offset. The following parameters are 67 * also passed in: 68 * 69 * CS - Chip select 70 * CK - Clock 71 * DO - Data out 72 * DI - Data in 73 * RDY - SEEPROM ready 74 * MS - Memory port mode select 75 * 76 * A failed read attempt returns 0, and a successful read returns 1. 77 */ 78 79 #define SEEPROM_INB(sd) \ 80 bus_space_read_1(sd->sd_tag, sd->sd_bsh, sd->sd_control_offset) 81 #define SEEPROM_OUTB(sd, value) \ 82 bus_space_write_1(sd->sd_tag, sd->sd_bsh, sd->sd_control_offset, value) 83 #define SEEPROM_STATUS_INB(sd) \ 84 bus_space_read_1(sd->sd_tag, sd->sd_bsh, sd->sd_status_offset) 85 #define SEEPROM_DATA_INB(sd) \ 86 bus_space_read_1(sd->sd_tag, sd->sd_bsh, sd->sd_dataout_offset) 87 88 int read_seeprom(struct seeprom_descriptor *sd, u_int16_t *buf, 89 bus_size_t start_addr, bus_size_t count); 90 91 #endif /* _KERNEL */ 92