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add retry to write_byte_program_jedec(), 99% success rate 

git-svn-id: svn://svn.coreboot.org/coreboot/trunk@1814 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
This commit is contained in:
Li-Ta Lo 2004-12-08 02:10:33 +00:00
parent c48822ae91
commit 19b6945a40
4 changed files with 12 additions and 74 deletions
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13
util/flash_and_burn/flash_rom.c
View File

@ -200,19 +200,6 @@ int main(int argc, char *argv[])
unsigned int exclude_start_position=0, exclude_end_position=0; // [x,y)
char *tempstr=NULL;
#if 0
#if 1
/* Keep fallback image */
exclude_start_position = 0x60000;
exclude_end_position = 0x80000;
#else
/* Keep DMI etc. */
exclude_start_position = 0x60000;
exclude_end_position = 0x70000;
#endif
#endif
if (argc > 1) {
/* Yes, print them. */

8
util/flash_and_burn/jedec.c
View File

@ -176,11 +176,14 @@ int write_page_write_jedec(volatile unsigned char *bios, unsigned char *src,
int write_byte_program_jedec(volatile unsigned char *bios, unsigned char *src,
volatile unsigned char *dst)
{
int tried = 0;
/* If the data is 0xFF, don't program it */
if (*src == 0xFF) {
return 0;
}
retry:
/* Issue JEDEC Byte Program command */
*(volatile unsigned char *) (bios + 0x5555) = 0xAA;
*(volatile unsigned char *) (bios + 0x2AAA) = 0x55;
@ -188,9 +191,12 @@ int write_byte_program_jedec(volatile unsigned char *bios, unsigned char *src,
/* transfer data from source to destination */
*dst = *src;
toggle_ready_jedec(bios);
if (*dst != *src && tried++ < 0x10) {
goto retry;
}
return 0;
}

25
util/flash_and_burn/sst_fwhub.c
View File

@ -79,10 +79,8 @@ int probe_sst_fwhub(struct flashchip *flash)
myusec_delay(10);
// we need to mmap the write-protect space.
printf("mapping control register at %x\n", 0 - 0x400000 -size);
bios = mmap(0, size, PROT_WRITE | PROT_READ, MAP_SHARED,
flash->fd_mem, (off_t) (0 - 0x400000 - size));
flash->fd_mem, (off_t) (0xFFFFFFFF - 0x400000 - size + 1));
if (bios == MAP_FAILED) {
// it's this part but we can't map it ...
perror("Error MMAP /dev/mem");
@ -101,23 +99,16 @@ unsigned char wait_sst_fwhub(volatile unsigned char *bios)
int erase_sst_fwhub_block(struct flashchip *flash, int offset)
{
volatile unsigned char *bios = flash->virt_addr + offset;
volatile unsigned char *wrprotect =
flash->virt_addr_2 + offset + 2;
volatile unsigned char *wrprotect = flash->virt_addr_2 + offset + 2;
unsigned char status;
// clear status register
printf("Erase at %p\n", bios);
//printf("Erase at %p\n", bios);
// clear write protect
printf("write protect is at %p\n", (wrprotect));
printf("write protect is 0x%x\n", *(wrprotect));
*(wrprotect) = 0;
printf("write protect is 0x%x\n", *(wrprotect));
erase_block_jedec(flash->virt_addr, offset);
status = wait_sst_fwhub(flash->virt_addr);
//print_sst_fwhub_status(status);
printf("DONE BLOCK 0x%x\n", offset);
return (0);
}
@ -126,11 +117,8 @@ int erase_sst_fwhub(struct flashchip *flash)
int i;
unsigned int total_size = flash->total_size * 1024;
printf("total_size is %d; flash->page_size is %d\n",
total_size, flash->page_size);
for (i = 0; i < total_size; i += flash->page_size)
erase_sst_fwhub_block(flash, i);
printf("DONE ERASE\n");
return (0);
}
@ -145,7 +133,6 @@ void write_page_sst_fwhub(volatile char *bios, char *src,
src++;
dst++;
}
}
int write_sst_fwhub(struct flashchip *flash, unsigned char *buf)
@ -165,10 +152,8 @@ int write_sst_fwhub(struct flashchip *flash, unsigned char *buf)
printf("%04d at address: 0x%08x", i, i * page_size);
write_page_sst_fwhub(bios, buf + i * page_size,
bios + i * page_size, page_size);
printf
("\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b");
printf("\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b");
}
printf("\n");
protect_sst_fwhub(bios);
return (0);
}

40
util/flash_and_burn/sst_fwhub.h
View File

@ -5,44 +5,4 @@ extern int probe_sst_fwhub(struct flashchip *flash);
extern int erase_sst_fwhub(struct flashchip *flash);
extern int write_sst_fwhub(struct flashchip *flash, unsigned char *buf);
extern __inline__ void toggle_ready_sst_fwhub(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_sst_fwhub(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_sst_fwhub(volatile char *bios)
{
*(volatile char *) (bios + 0x5555) = 0xAA;
*(volatile char *) (bios + 0x2AAA) = 0x55;
*(volatile char *) (bios + 0x5555) = 0xA0;
usleep(200);
}
#endif /* !__SST_FWHUB_H__ */