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mtd: nand: Add naieve panic_write support for generic nand devices.

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Signed-off-by: San Mehat <san@google.com>

mtd: nand_base: fix nand_panic_wait

fix the problem of nand_panic_wait

Signed-off-by: Tom Zhu <a2289c@android-hal-04.(none)>
Signed-off-by: San Mehat <san@google.com>
This commit is contained in:
San Mehat 2009-08-20 10:50:45 -07:00 committed by Colin Cross
parent 9272a144e5
commit b571c837e6
1 changed files with 39 additions and 0 deletions
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39
drivers/mtd/nand/nand_base.c
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@ -3217,6 +3217,44 @@ int nand_scan_ident(struct mtd_info *mtd, int maxchips,
}
EXPORT_SYMBOL(nand_scan_ident);
static void nand_panic_wait(struct mtd_info *mtd)
{
struct nand_chip *chip = mtd->priv;
int i;
if (chip->state != FL_READY)
for (i = 0; i < 40; i++) {
if (chip->dev_ready(mtd))
break;
mdelay(10);
}
chip->state = FL_READY;
}
static int nand_panic_write(struct mtd_info *mtd, loff_t to, size_t len,
size_t *retlen, const u_char *buf)
{
struct nand_chip *chip = mtd->priv;
int ret;
/* Do not allow reads past end of device */
if ((to + len) > mtd->size)
return -EINVAL;
if (!len)
return 0;
nand_panic_wait(mtd);
chip->ops.len = len;
chip->ops.datbuf = (uint8_t *)buf;
chip->ops.oobbuf = NULL;
ret = nand_do_write_ops(mtd, to, &chip->ops);
*retlen = chip->ops.retlen;
return ret;
}
/**
* nand_scan_tail - [NAND Interface] Scan for the NAND device
@ -3460,6 +3498,7 @@ int nand_scan_tail(struct mtd_info *mtd)
mtd->panic_write = panic_nand_write;
mtd->read_oob = nand_read_oob;
mtd->write_oob = nand_write_oob;
mtd->panic_write = nand_panic_write;
mtd->sync = nand_sync;
mtd->lock = NULL;
mtd->unlock = NULL;