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dfu, nand: before write a buffer to nand, erase the nand sectors

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before writing the received buffer to nand, erase the nand
sectors. If not doing this, nand write fails. See for
more info here:

http://lists.denx.de/pipermail/u-boot/2013-June/156361.html

Using the nand erase option "spread", maybe overwrite
blocks on, for example another mtd partition, if the
erasing range contains bad blocks.
So a limit option is added to nand_erase_opts()

Signed-off-by: Heiko Schocher <hs@denx.de>
Cc: Scott Wood <scottwood@freescale.com>
Cc: Pantelis Antoniou <panto@antoniou-consulting.com>
Cc: Lukasz Majewski <l.majewski@samsung.com>
Cc: Kyungmin Park <kyungmin.park@samsung.com>
Cc: Marek Vasut <marex@denx.de>
Cc: Tom Rini <trini@ti.com>
Signed-off-by: Scott Wood <scottwood@freescale.com>
This commit is contained in:
Heiko Schocher 2013-06-24 18:50:40 +02:00 committed by Scott Wood
parent 9b80aa8ec9
commit a67cc37e69
3 changed files with 22 additions and 2 deletions
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18
drivers/dfu/dfu_nand.c
View File

@ -63,12 +63,26 @@ static int nand_block_op(enum dfu_nand_op op, struct dfu_entity *dfu,
nand = &nand_info[nand_curr_device];
if (op == DFU_OP_READ)
if (op == DFU_OP_READ) {
ret = nand_read_skip_bad(nand, start, &count, &actual,
lim, buf);
else
} else {
nand_erase_options_t opts;
memset(&opts, 0, sizeof(opts));
opts.offset = start;
opts.length = count;
opts.spread = 1;
opts.quiet = 1;
opts.lim = lim;
/* first erase */
ret = nand_erase_opts(nand, &opts);
if (ret)
return ret;
/* then write */
ret = nand_write_skip_bad(nand, start, &count, &actual,
lim, buf, 0);
}
if (ret != 0) {
printf("%s: nand_%s_skip_bad call failed at %llx!\n",

4
drivers/mtd/nand/nand_util.c
View File

@ -120,6 +120,10 @@ int nand_erase_opts(nand_info_t *meminfo, const nand_erase_options_t *opts)
WATCHDOG_RESET();
if (opts->lim && (erase.addr >= (opts->offset + opts->lim))) {
puts("Size of erase exceeds limit\n");
return -EFBIG;
}
if (!opts->scrub && bbtest) {
int ret = mtd_block_isbad(meminfo, erase.addr);
if (ret > 0) {

2
include/nand.h
View File

@ -125,6 +125,8 @@ struct nand_erase_options {
/* Don't include skipped bad blocks in size to be erased */
int spread;
/* maximum size that actual may be in order to not exceed the buf */
loff_t lim;
};
typedef struct nand_erase_options nand_erase_options_t;