summaryrefslogtreecommitdiff
path: root/drivers/mtd
diff options
context:
space:
mode:
authorSan Mehat <san@google.com>2009-08-20 10:50:45 -0700
committerDan Willemsen <dwillemsen@nvidia.com>2011-11-30 21:38:13 -0800
commit3747cea7c1ac23d593c6c91c74e243abb5e8d254 (patch)
treeb13ce974aafeb18122268c786b79d2fa895abbc4 /drivers/mtd
parent5289f2b5e494ee01f6a2b914b8075f1eb33e5721 (diff)
mtd: nand: Add naieve panic_write support for generic nand devices.
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>
Diffstat (limited to 'drivers/mtd')
-rw-r--r--drivers/mtd/nand/nand_base.c39
1 files changed, 39 insertions, 0 deletions
diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c
index 86f05f45780a..15d71658b4f1 100644
--- a/drivers/mtd/nand/nand_base.c
+++ b/drivers/mtd/nand/nand_base.c
@@ -3222,6 +3222,44 @@ 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
@@ -3465,6 +3503,7 @@ 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;