fbf43ac5a6
git-svn-id: svn://svn.coreboot.org/coreboot/trunk@1457 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
80 lines
1.7 KiB
C
80 lines
1.7 KiB
C
#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__ */
|