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Enable sector erase function for selected ST M50 chips

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Affected chips: M50FLW040A, M50FLW040B, M50FLW080A, M50FLW080B.

Corresponding to flashrom svn r1738.

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:
Stefan Tauner
2013-09-12 08:29:06 +00:00
parent 8c4602b8ab
commit beaffd8859
2 changed files with 22 additions and 10 deletions
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24
stm50.c
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@ -84,10 +84,9 @@ int unlock_stm50_uniform(struct flashctx *flash)
return 0;
}
/* This function is unused. */
int erase_sector_stm50(struct flashctx *flash, unsigned int sector, unsigned int sectorsize)
static int stm50_erase_sector(struct flashctx *flash, unsigned int addr)
{
chipaddr bios = flash->virtual_memory + sector;
chipaddr bios = flash->virtual_memory + addr;
// clear status register
chip_writeb(flash, 0x50, bios);
@ -96,8 +95,21 @@ int erase_sector_stm50(struct flashctx *flash, unsigned int sector, unsigned int
chip_writeb(flash, 0xd0, bios);
programmer_delay(10);
wait_82802ab(flash);
uint8_t status = wait_82802ab(flash);
print_status_82802ab(status);
/* FIXME: Check the status register for errors. */
return 0;
return status == 0x80;
}
/* Some ST M50* chips do support erasing of sectors. This function will derive the erase function to use from
* the length of the of the block. For calls that apparently do not address a sector (but a block) we just call
* the block erase function instead. FIXME: This duplicates the behavior of the remaining erasers for blocks and
* might be fixed when flashrom supports multiple functions per eraser or erasers that do erase parts of the
* chip only. */
int erase_sector_stm50(struct flashctx *flash, unsigned int addr, unsigned int len)
{
if (len == 4096)
return stm50_erase_sector(flash, addr);
else
return erase_block_82802ab(flash, addr, len);
}