flash.h

Compex BIOS for SAMSUNG S3C4510B v1.20-lt

#ifndef __FLASH_H
#define __FLASH_H

#include "board.h"

#define MAX_CHIPS             6

#define DEVICE_TYPE_X8	(8 / 8)
#define DEVICE_TYPE_X16	(16 / 8)
#define DEVICE_TYPE_X32	(32 / 8)

/* Addresses */
#define ADDR_MANUFACTURER		0x0000
#define ADDR_DEVICE_ID			0x0001
#define ADDR_SECTOR_LOCK		0x0002
#define ADDR_HANDSHAKE			0x0003
#define ADDR_UNLOCK_1			0x0555
#define ADDR_UNLOCK_2			0x02AA


/* Commands */
#define CMD_UNLOCK_DATA_1		0x00AA
#define CMD_UNLOCK_DATA_2		0x0055
#define CMD_MANUFACTURER_UNLOCK_DATA	0x0090
#define CMD_UNLOCK_BYPASS_MODE		0x0020
#define CMD_PROGRAM_UNLOCK_DATA		0x00A0
#define CMD_RESET_DATA			0x00F0
#define CMD_SECTOR_ERASE_UNLOCK_DATA	0x0080
#define CMD_SECTOR_ERASE_UNLOCK_DATA_2	0x0030

#define CMD_UNLOCK_SECTOR		0x0060


/* Manufacturers */
#define MANUFACTURER_AMD		0x0001
#define MANUFACTURER_FUJITSU		0x0004
#define MANUFACTURER_ATMEL		0x001f
#define MANUFACTURER_ST			0x0020
#define MANUFACTURER_TOSHIBA		0x0098
#define MANUFACTURER_HYNIX		0x00ad
#define MANUFACTURER_SST		0x00bf

/* AMD */
#define AM29F040B			0x00a4
#define AM29F800BB			0x2258
#define AM29F800BT			0x22d6
#define AM29LV040B			0x004f
#define AM29LV800BB			0x225b
#define AM29LV800BT			0x22da
#define AM29LV160BT_DT			0x22c4
#define AM29LV160BB_DB			0x2249

/* HYNIX */
#define HY29F040A			0x00a4
#define HY29LV160T			0x22c4
#define HY29LV160B			0x2249

/* SST */
#define SST39VF040                      0x00D7
#define SST39VF080                      0x00D8
#define SST39VF016                      0x00D9

#define D6_MASK	                        0x40

struct flchip {
	unsigned long start;	/* Offset within the map */
	unsigned long size;
	unsigned long erasesize;
	int buswidth;		/* in octets */
	struct mtd_info *mtd;
};

struct mtd_info {
	unsigned long offset; /* Offset within the memory */
	unsigned long size;   /* Total size of the MTD */
	int numchips;	
	struct flchip chips[MAX_CHIPS];
};

struct flash_info {
	const unsigned short mfr_id;
	const unsigned short dev_id;
	const char *name;
	const unsigned long size;
	const unsigned long erasesize;
};


int flash_init(unsigned long rom_base);
int flash_read(unsigned long from,
	unsigned long len, unsigned long *retlen, unsigned char *buf);
int flash_write(unsigned long to,
	unsigned long len, unsigned long *retlen, const unsigned char *buf);
int flash_erase(unsigned long addr, unsigned long size);


#endif /* __FLASH_H */