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Code Issues Releases Wiki Activity

Add support for ST M29F400BT - part 2

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Corresponding to coreboot v1 svn r589.
This commit is contained in:
Ronald G. Minnich
2002-06-11 19:15:55 +00:00
parent 3c910ed807
commit b193490201
2 changed files with 247 additions and 0 deletions
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67
m29f400bt.h Normal file
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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, char * buf);
extern int write_linuxbios_m29f400bt (struct flashchip * flash, 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, 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",dst-bios, *dst, *src);
dst++;
src++;
}
}