diff options
Diffstat (limited to 'drivers/mtd/chips')
| -rw-r--r-- | drivers/mtd/chips/cfi_cmdset_0002.c | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/drivers/mtd/chips/cfi_cmdset_0002.c b/drivers/mtd/chips/cfi_cmdset_0002.c index 5ff5c4a16943..b86197286f24 100644 --- a/drivers/mtd/chips/cfi_cmdset_0002.c +++ b/drivers/mtd/chips/cfi_cmdset_0002.c @@ -1536,8 +1536,20 @@ static int __xipram do_write_buffer(struct map_info *map, struct flchip *chip, UDELAY(map, chip, adr, 1); } - /* reset on all failures. */ - map_write( map, CMD(0xF0), chip->start ); + /* + * Recovery from write-buffer programming failures requires + * the write-to-buffer-reset sequence. Since the last part + * of the sequence also works as a normal reset, we can run + * the same commands regardless of why we are here. + * See e.g. + * http://www.spansion.com/Support/Application%20Notes/MirrorBit_Write_Buffer_Prog_Page_Buffer_Read_AN.pdf + */ + cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, + cfi->device_type, NULL); + cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, + cfi->device_type, NULL); + cfi_send_gen_cmd(0xF0, cfi->addr_unlock1, chip->start, map, cfi, + cfi->device_type, NULL); xip_enable(map, chip, adr); /* FIXME - should have reset delay before continuing */ |