Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame^] | 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_ */ |