67 lines
1.3 KiB
C
67 lines
1.3 KiB
C
|
#ifndef __JEDEC_H__
|
||
|
|
#define __JEDEC_H__ 1
|
||
|
|
|
||
|
|
extern int probe_jedec (struct flashchip * flash);
|
||
|
|
extern int erase_jedec (struct flashchip * flash);
|
||
|
|
extern int write_jedec (struct flashchip * flash, unsigned char * buf);
|
||
|
|
|
||
|
|
extern __inline__ void toggle_ready_jedec (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_jedec (volatile char * dst, char data)
|
||
|
|
{
|
||
|
|
unsigned int i = 0;
|
||
|
|
char tmp;
|
||
|
|
|
||
|
|
data &= 0x80;
|
||
|
|
|
||
|
|
while (i++ < 0xFFFFFF) {
|
||
|
|
tmp = *dst & 0x80;
|
||
|
|
if (tmp == data) {
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
extern __inline__ void protect_jedec (volatile char * bios)
|
||
|
|
{
|
||
|
|
*(volatile char *) (bios + 0x5555) = 0xAA;
|
||
|
|
*(volatile char *) (bios + 0x2AAA) = 0x55;
|
||
|
|
*(volatile char *) (bios + 0x5555) = 0xA0;
|
||
|
|
|
||
|
|
usleep(200);
|
||
|
|
}
|
||
|
|
|
||
|
|
extern __inline__ void write_page_jedec (volatile char * bios, char * src, volatile char * dst,
|
||
|
|
int page_size)
|
||
|
|
{
|
||
|
|
int i;
|
||
|
|
|
||
|
|
*(volatile char *) (bios + 0x5555) = 0xAA;
|
||
|
|
*(volatile char *) (bios + 0x2AAA) = 0x55;
|
||
|
|
*(volatile char *) (bios + 0x5555) = 0xA0;
|
||
|
|
|
||
|
|
for (i = 0; i < page_size; i++) {
|
||
|
|
/* transfer data from source to destination */
|
||
|
|
*dst++ = *src++;
|
||
|
|
}
|
||
|
|
|
||
|
|
usleep(100);
|
||
|
|
toggle_ready_jedec(dst-1);
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif /* !__JEDEC_H__ */
|