80 lines
1.7 KiB
C
80 lines
1.7 KiB
C
#ifndef __M29F400BT_H__
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#define __M29F400BT_H__ 1
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#include <stdio.h>
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extern int probe_m29f400bt(struct flashchip *flash);
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extern int erase_m29f400bt(struct flashchip *flash);
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extern int block_erase_m29f400bt(volatile char *bios, volatile char *dst);
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extern int write_m29f400bt(struct flashchip *flash, unsigned char *buf);
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extern int write_linuxbios_m29f400bt(struct flashchip *flash,
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unsigned char *buf);
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extern __inline__ void toggle_ready_m29f400bt(volatile char *dst)
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{
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unsigned int i = 0;
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char tmp1, tmp2;
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tmp1 = *dst & 0x40;
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while (i++ < 0xFFFFFF) {
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tmp2 = *dst & 0x40;
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if (tmp1 == tmp2) {
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break;
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}
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tmp1 = tmp2;
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}
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}
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extern __inline__ void data_polling_m29f400bt(volatile char *dst,
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unsigned char data)
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{
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unsigned int i = 0;
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char tmp;
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data &= 0x80;
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while (i++ < 0xFFFFFF) {
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tmp = *dst & 0x80;
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if (tmp == data) {
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break;
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}
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}
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}
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extern __inline__ void protect_m29f400bt(volatile char *bios)
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{
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*(volatile char *) (bios + 0xAAA) = 0xAA;
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*(volatile char *) (bios + 0x555) = 0x55;
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*(volatile char *) (bios + 0xAAA) = 0xA0;
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usleep(200);
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}
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extern __inline__ void write_page_m29f400bt(volatile char *bios, char *src,
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volatile char *dst,
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int page_size)
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{
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int i;
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for (i = 0; i < page_size; i++) {
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*(volatile char *) (bios + 0xAAA) = 0xAA;
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*(volatile char *) (bios + 0x555) = 0x55;
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*(volatile char *) (bios + 0xAAA) = 0xA0;
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/* transfer data from source to destination */
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*dst = *src;
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//*(volatile char *) (bios) = 0xF0;
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//usleep(5);
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toggle_ready_m29f400bt(dst);
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printf
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("Value in the flash at address %p = %#x, want %#x\n",
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(char *) (dst - bios), *dst, *src);
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dst++;
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src++;
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}
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}
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#endif /* !__M29F400BT_H__ */
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