#ifndef __M29F400BT_H__
#define __M29F400BT_H__ 1

#include <stdio.h>

extern int probe_m29f400bt (struct flashchip * flash);
extern int erase_m29f400bt (struct flashchip * flash);
extern int block_erase_m29f400bt (volatile char * bios, volatile char * dst);
extern int write_m29f400bt (struct flashchip * flash, unsigned char * buf);
extern int write_linuxbios_m29f400bt (struct flashchip * flash, unsigned char * buf);

extern __inline__ void toggle_ready_m29f400bt (volatile char * dst)
{
	unsigned int i = 0;
	char tmp1, tmp2;

	tmp1 = *dst & 0x40;

	while (i++ < 0xFFFFFF) {
		tmp2 = *dst & 0x40;
		if (tmp1 == tmp2) {
			break;
		}
		tmp1 = tmp2;
	}
}

extern __inline__ void data_polling_m29f400bt (volatile char * dst, unsigned char data)
{
	unsigned int i = 0;
	char tmp;

	data &= 0x80;

	while (i++ < 0xFFFFFF) {
		tmp = *dst & 0x80;
		if (tmp == data) {
			break;
		}
	}
}

extern __inline__ void protect_m29f400bt (volatile char * bios)
{
	*(volatile char *) (bios + 0xAAA) = 0xAA;
	*(volatile char *) (bios + 0x555) = 0x55;
	*(volatile char *) (bios + 0xAAA) = 0xA0;

	usleep(200);
}

extern __inline__ void write_page_m29f400bt (volatile char * bios, char * src, volatile char * dst,
					 int page_size)
{
	int i;
	
	for (i = 0; i < page_size; i++) {
		*(volatile char *) (bios + 0xAAA) = 0xAA;
		*(volatile char *) (bios + 0x555) = 0x55;
		*(volatile char *) (bios + 0xAAA) = 0xA0;

		/* transfer data from source to destination */
		*dst = *src;
		//*(volatile char *) (bios) = 0xF0;
		//usleep(5);
		toggle_ready_m29f400bt(dst);
		printf("Value in the flash at address %p = %#x, want %#x\n",(char *)(dst-bios), *dst, *src);
		dst++;
		src++;
	}

}

#endif /* !__M29F400BT_H__ */