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Trying to make this general purpose user-land flash burner

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Corresponding to coreboot v1 svn r489.
This commit is contained in:
Ronald G. Minnich
2002-01-29 18:21:41 +00:00
commit 5e5f75e559
11 changed files with 1016 additions and 0 deletions
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61
jedec.h Normal file
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extern int probe_jedec (struct flashchip * flash);
extern int erase_jedec (struct flashchip * flash);
extern int write_jedec (struct flashchip * flash, char * buf);
extern __inline__ void toggle_ready_jedec (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 (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 (char * bios)
{
*(char *) (bios + 0x5555) = 0xAA;
*(char *) (bios + 0x2AAA) = 0x55;
*(char *) (bios + 0x5555) = 0xA0;
usleep(200);
}
extern __inline__ void write_page_jedec (char * bios, char * src, char * dst,
int page_size)
{
int i;
*(char *) (bios + 0x5555) = 0xAA;
*(char *) (bios + 0x2AAA) = 0x55;
*(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);
}