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Refactor unlocking of many chips with locking at register space address +2

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This includes PMC Pm49*, SST 49LF00*, ST M50* and Winbond W39* families.
The erase and write test status bits of all affected chips have been reset.

Corresponding to flashrom svn r1833.

Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
Signed-off-by: Stefan Tauner <stefan.tauner@alumni.tuwien.ac.at>
Acked-by: Stefan Tauner <stefan.tauner@alumni.tuwien.ac.at>
This commit is contained in:
Carl-Daniel Hailfinger
2014-08-03 13:05:34 +00:00
committed by Stefan Tauner
parent 2a41f0a2c0
commit ef3ac8ac17
9 changed files with 248 additions and 315 deletions
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55
stm50.c
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@ -27,63 +27,8 @@
*/
#include "flash.h"
#include "flashchips.h"
#include "chipdrivers.h"
static int stm50_unlock_address(struct flashctx *flash, int offset)
{
chipaddr wrprotect = flash->virtual_registers + 2;
static const uint8_t unlock_sector = 0x00;
msg_cdbg("unlocking at 0x%x\n", offset);
chip_writeb(flash, unlock_sector, wrprotect + offset);
if (chip_readb(flash, wrprotect + offset) != unlock_sector) {
msg_cerr("Cannot unlock address 0x%x\n", offset);
return -1;
}
return 0;
}
/* Chips known to use a non-uniform block and sector layout for locking (as well as for erasing):
* Name Size Address range of lock registers
* M50FLW080A 1MB FFB00002 - FFBFF002
* M50FLW080B 1MB FFB00002 - FFBFF002
* M50FW002 256k FFBC0002 - FFBFC002
* M50LPW116 2MB FFA00002 - FFBFC002
*/
int unlock_stm50_nonuniform(struct flashctx *flash)
{
int i;
struct eraseblock *eraseblocks = flash->chip->block_erasers[0].eraseblocks;
unsigned int done = 0;
for (i = 0; i < NUM_ERASEREGIONS && eraseblocks[i].count != 0; i++) {
unsigned int block_size = eraseblocks[i].size;
unsigned int block_count = eraseblocks[i].count;
int j;
for (j = 0; j < block_count; j++) {
if (stm50_unlock_address(flash, done)) {
msg_cerr("UNLOCK FAILED!\n");
return -1;
}
done += block_count * block_size;
}
}
return 0;
}
/* Unlocking for uniform 64 kB blocks starting at offset 2 of the feature registers. */
int unlock_stm50_uniform(struct flashctx *flash)
{
int i;
for (i = 0; i < flash->chip->total_size * 1024; i+= 64 * 1024) {
if (stm50_unlock_address(flash, i)) {
msg_cerr("UNLOCK FAILED!\n");
return -1;
}
}
return 0;
}
static int stm50_erase_sector(struct flashctx *flash, unsigned int addr)
{
chipaddr bios = flash->virtual_memory + addr;