| 1 | /* |
| 2 | * nand.h |
| 3 | * |
| 4 | * Standard NAND Flash definitions. |
| 5 | */ |
| 6 | #ifndef __NAND_H__ |
| 7 | #define __NAND_H__ |
| 8 | |
| 9 | /* |
| 10 | * Standard NAND flash commands |
| 11 | */ |
| 12 | #define NAND_CMD_READ0 0 |
| 13 | #define NAND_CMD_READ1 1 |
| 14 | #define NAND_CMD_RNDOUT 5 |
| 15 | #define NAND_CMD_PAGEPROG 0x10 |
| 16 | #define NAND_CMD_READOOB 0x50 |
| 17 | #define NAND_CMD_ERASE1 0x60 |
| 18 | #define NAND_CMD_STATUS 0x70 |
| 19 | #define NAND_CMD_STATUS_MULTI 0x71 |
| 20 | #define NAND_CMD_SEQIN 0x80 |
| 21 | #define NAND_CMD_RNDIN 0x85 |
| 22 | #define NAND_CMD_READID 0x90 |
| 23 | #define NAND_CMD_ERASE2 0xd0 |
| 24 | #define NAND_CMD_RESET 0xff |
| 25 | |
| 26 | /* Extended commands for large page devices */ |
| 27 | #define NAND_CMD_READSTART 0x30 |
| 28 | #define NAND_CMD_RNDOUTSTART 0xE0 |
| 29 | #define NAND_CMD_CACHEDPROG 0x15 |
| 30 | |
| 31 | /* Status bits */ |
| 32 | #define NAND_STATUS_FAIL 0x01 |
| 33 | #define NAND_STATUS_FAIL_N1 0x02 |
| 34 | #define NAND_STATUS_TRUE_READY 0x20 |
| 35 | #define NAND_STATUS_READY 0x40 |
| 36 | #define NAND_STATUS_WP 0x80 |
| 37 | |
| 38 | /* |
| 39 | * NAND Flash Manufacturer ID Codes |
| 40 | */ |
| 41 | #define NAND_MFR_TOSHIBA 0x98 |
| 42 | #define NAND_MFR_SAMSUNG 0xec |
| 43 | #define NAND_MFR_FUJITSU 0x04 |
| 44 | #define NAND_MFR_NATIONAL 0x8f |
| 45 | #define NAND_MFR_RENESAS 0x07 |
| 46 | #define NAND_MFR_STMICRO 0x20 |
| 47 | #define NAND_MFR_HYNIX 0xad |
| 48 | #define NAND_MFR_MICRON 0x2c |
| 49 | |
| 50 | /* |
| 51 | * NAND parameter struct |
| 52 | */ |
| 53 | struct nand_param { |
| 54 | unsigned int bus_width; /* data bus width: 8-bit/16-bit */ |
| 55 | unsigned int row_cycle; /* row address cycles: 2/3 */ |
| 56 | unsigned int page_size; /* page size in bytes: 512/2048 */ |
| 57 | unsigned int oob_size; /* oob size in bytes: 16/64 */ |
| 58 | unsigned int page_per_block; /* pages per block: 32/64/128 */ |
| 59 | unsigned int bad_block_pos; /* bad block pos in oob: 0/5 */ |
| 60 | }; |
| 61 | |
| 62 | /* |
| 63 | * NAND routines |
| 64 | */ |
| 65 | extern void nand_enable(void); |
| 66 | extern void nand_disable(void); |
| 67 | extern int block_is_bad(struct nand_param *nandp, int block); |
| 68 | extern int nand_read_page(struct nand_param *nandp, int block, int page, unsigned char *dst); |
| 69 | |
| 70 | #endif /* __NAND_H__ */ |
| 71 | |
