mtd: nand: Allow caller to pass alternative ID table to nand_scan_ident()
This patch sync with David's patch on Linux for handling nand_scan_ident.
commit 5e81e88a4c140586d9212999cea683bcd66a15c6
Author: David Woodhouse <David.Woodhouse@intel.com>
Date: Fri Feb 26 18:32:56 2010 +0000
mtd: nand: Allow caller to pass alternative ID table to nand_scan_ident()
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Signed-off-by: Lei Wen <leiwen@marvell.com>
diff --git a/drivers/mtd/nand/atmel_nand.c b/drivers/mtd/nand/atmel_nand.c
index d5eb54a..ab8bbb3 100644
--- a/drivers/mtd/nand/atmel_nand.c
+++ b/drivers/mtd/nand/atmel_nand.c
@@ -296,7 +296,7 @@
mtd->priv = nand;
/* Detect NAND chips */
- if (nand_scan_ident(mtd, 1)) {
+ if (nand_scan_ident(mtd, 1, NULL)) {
printk(KERN_WARNING "NAND Flash not found !\n");
return -ENXIO;
}
diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c
index 5239c1f..3b96b0e 100644
--- a/drivers/mtd/nand/nand_base.c
+++ b/drivers/mtd/nand/nand_base.c
@@ -2414,10 +2414,10 @@
*/
static const struct nand_flash_dev *nand_get_flash_type(struct mtd_info *mtd,
struct nand_chip *chip,
- int busw, int *maf_id)
+ int busw, int *maf_id,
+ const struct nand_flash_dev *type)
{
- const struct nand_flash_dev *type = NULL;
- int i, dev_id, maf_idx;
+ int dev_id, maf_idx;
int tmp_id, tmp_manf;
/* Select the device */
@@ -2456,15 +2456,14 @@
return ERR_PTR(-ENODEV);
}
- /* Lookup the flash id */
- for (i = 0; nand_flash_ids[i].name != NULL; i++) {
- if (dev_id == nand_flash_ids[i].id) {
- type = &nand_flash_ids[i];
- break;
- }
- }
+ if (!type)
+ type = nand_flash_ids;
- if (!type) {
+ for (; type->name != NULL; type++)
+ if (dev_id == type->id)
+ break;
+
+ if (!type->name) {
/* supress warning if there is no nand */
if (*maf_id != 0x00 && *maf_id != 0xff &&
dev_id != 0x00 && dev_id != 0xff)
@@ -2580,13 +2579,15 @@
* nand_scan_ident - [NAND Interface] Scan for the NAND device
* @mtd: MTD device structure
* @maxchips: Number of chips to scan for
+ * @table: Alternative NAND ID table
*
* This is the first phase of the normal nand_scan() function. It
* reads the flash ID and sets up MTD fields accordingly.
*
* The mtd->owner field must be set to the module of the caller.
*/
-int nand_scan_ident(struct mtd_info *mtd, int maxchips)
+int nand_scan_ident(struct mtd_info *mtd, int maxchips,
+ const struct nand_flash_dev *table)
{
int i, busw, nand_maf_id;
struct nand_chip *chip = mtd->priv;
@@ -2598,7 +2599,7 @@
nand_set_defaults(chip, busw);
/* Read the flash type */
- type = nand_get_flash_type(mtd, chip, busw, &nand_maf_id);
+ type = nand_get_flash_type(mtd, chip, busw, &nand_maf_id, table);
if (IS_ERR(type)) {
#ifndef CONFIG_SYS_NAND_QUIET_TEST
@@ -2869,7 +2870,7 @@
{
int ret;
- ret = nand_scan_ident(mtd, maxchips);
+ ret = nand_scan_ident(mtd, maxchips, NULL);
if (!ret)
ret = nand_scan_tail(mtd);
return ret;
diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h
index 1128f5a..d299929 100644
--- a/include/linux/mtd/nand.h
+++ b/include/linux/mtd/nand.h
@@ -33,11 +33,13 @@
struct mtd_info;
+struct nand_flash_dev;
/* Scan and identify a NAND device */
extern int nand_scan (struct mtd_info *mtd, int max_chips);
/* Separate phases of nand_scan(), allowing board driver to intervene
* and override command or ECC setup according to flash type */
-extern int nand_scan_ident(struct mtd_info *mtd, int max_chips);
+extern int nand_scan_ident(struct mtd_info *mtd, int max_chips,
+ const struct nand_flash_dev *table);
extern int nand_scan_tail(struct mtd_info *mtd);
/* Free resources held by the NAND device */