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71 lines
1.8 KiB
C
71 lines
1.8 KiB
C
/*
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* nand.h
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*
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* Standard NAND Flash definitions.
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*/
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#ifndef __NAND_H__
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#define __NAND_H__
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/*
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* Standard NAND flash commands
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*/
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#define NAND_CMD_READ0 0
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#define NAND_CMD_READ1 1
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#define NAND_CMD_RNDOUT 5
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#define NAND_CMD_PAGEPROG 0x10
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#define NAND_CMD_READOOB 0x50
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#define NAND_CMD_ERASE1 0x60
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#define NAND_CMD_STATUS 0x70
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#define NAND_CMD_STATUS_MULTI 0x71
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#define NAND_CMD_SEQIN 0x80
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#define NAND_CMD_RNDIN 0x85
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#define NAND_CMD_READID 0x90
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#define NAND_CMD_ERASE2 0xd0
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#define NAND_CMD_RESET 0xff
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/* Extended commands for large page devices */
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#define NAND_CMD_READSTART 0x30
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#define NAND_CMD_RNDOUTSTART 0xE0
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#define NAND_CMD_CACHEDPROG 0x15
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/* Status bits */
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#define NAND_STATUS_FAIL 0x01
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#define NAND_STATUS_FAIL_N1 0x02
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#define NAND_STATUS_TRUE_READY 0x20
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#define NAND_STATUS_READY 0x40
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#define NAND_STATUS_WP 0x80
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/*
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* NAND Flash Manufacturer ID Codes
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*/
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#define NAND_MFR_TOSHIBA 0x98
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#define NAND_MFR_SAMSUNG 0xec
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#define NAND_MFR_FUJITSU 0x04
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#define NAND_MFR_NATIONAL 0x8f
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#define NAND_MFR_RENESAS 0x07
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#define NAND_MFR_STMICRO 0x20
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#define NAND_MFR_HYNIX 0xad
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#define NAND_MFR_MICRON 0x2c
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/*
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* NAND parameter struct
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*/
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struct nand_param {
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unsigned int bus_width; /* data bus width: 8-bit/16-bit */
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unsigned int row_cycle; /* row address cycles: 2/3 */
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unsigned int page_size; /* page size in bytes: 512/2048 */
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unsigned int oob_size; /* oob size in bytes: 16/64 */
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unsigned int page_per_block; /* pages per block: 32/64/128 */
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unsigned int bad_block_pos; /* bad block pos in oob: 0/5 */
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};
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/*
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* NAND routines
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*/
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extern void nand_enable(void);
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extern void nand_disable(void);
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extern int block_is_bad(struct nand_param *nandp, int block);
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extern int nand_read_page(struct nand_param *nandp, int block, int page, unsigned char *dst);
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#endif /* __NAND_H__ */
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