| wdenk | e221174 | 2002-11-02 23:30:20 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * u-boot/include/linux/mtd/nand.h |
| 3 | * |
| 4 | * Copyright (c) 2000 David Woodhouse <dwmw2@mvhi.com> |
| 5 | * Steven J. Hill <sjhill@cotw.com> |
| 6 | * |
| 7 | * $Id: nand.h,v 1.8 2000/10/30 17:16:17 sjhill Exp $ |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU General Public License version 2 as |
| 11 | * published by the Free Software Foundation. |
| 12 | * |
| 13 | * Info: |
| 14 | * Contains standard defines and IDs for NAND flash devices |
| 15 | * |
| 16 | * Changelog: |
| 17 | * 01-31-2000 DMW Created |
| 18 | * 09-18-2000 SJH Moved structure out of the Disk-On-Chip drivers |
| 19 | * so it can be used by other NAND flash device |
| 20 | * drivers. I also changed the copyright since none |
| 21 | * of the original contents of this file are specific |
| 22 | * to DoC devices. David can whack me with a baseball |
| 23 | * bat later if I did something naughty. |
| 24 | * 10-11-2000 SJH Added private NAND flash structure for driver |
| 25 | * 10-24-2000 SJH Added prototype for 'nand_scan' function |
| 26 | */ |
| 27 | #ifndef __LINUX_MTD_NAND_H |
| 28 | #define __LINUX_MTD_NAND_H |
| 29 | |
| 30 | /* |
| 31 | * Standard NAND flash commands |
| 32 | */ |
| 33 | #define NAND_CMD_READ0 0 |
| 34 | #define NAND_CMD_READ1 1 |
| 35 | #define NAND_CMD_PAGEPROG 0x10 |
| 36 | #define NAND_CMD_READOOB 0x50 |
| 37 | #define NAND_CMD_ERASE1 0x60 |
| 38 | #define NAND_CMD_STATUS 0x70 |
| 39 | #define NAND_CMD_SEQIN 0x80 |
| 40 | #define NAND_CMD_READID 0x90 |
| 41 | #define NAND_CMD_ERASE2 0xd0 |
| 42 | #define NAND_CMD_RESET 0xff |
| 43 | |
| 44 | /* |
| 45 | * NAND Flash Manufacturer ID Codes |
| 46 | */ |
| 47 | #define NAND_MFR_TOSHIBA 0x98 |
| 48 | #define NAND_MFR_SAMSUNG 0xec |
| 49 | |
| 50 | /* |
| 51 | * NAND Flash Device ID Structure |
| 52 | * |
| 53 | * Structure overview: |
| 54 | * |
| 55 | * name - Complete name of device |
| 56 | * |
| 57 | * manufacture_id - manufacturer ID code of device. |
| 58 | * |
| 59 | * model_id - model ID code of device. |
| 60 | * |
| 61 | * chipshift - total number of address bits for the device which |
| 62 | * is used to calculate address offsets and the total |
| 63 | * number of bytes the device is capable of. |
| 64 | * |
| 65 | * page256 - denotes if flash device has 256 byte pages or not. |
| 66 | * |
| 67 | * pageadrlen - number of bytes minus one needed to hold the |
| 68 | * complete address into the flash array. Keep in |
| 69 | * mind that when a read or write is done to a |
| 70 | * specific address, the address is input serially |
| 71 | * 8 bits at a time. This structure member is used |
| 72 | * by the read/write routines as a loop index for |
| 73 | * shifting the address out 8 bits at a time. |
| 74 | * |
| 75 | * erasesize - size of an erase block in the flash device. |
| 76 | */ |
| 77 | struct nand_flash_dev { |
| 78 | char * name; |
| 79 | int manufacture_id; |
| 80 | int model_id; |
| 81 | int chipshift; |
| 82 | char page256; |
| 83 | char pageadrlen; |
| 84 | unsigned long erasesize; |
| 85 | }; |
| 86 | |
| 87 | #endif /* __LINUX_MTD_NAND_H */ |