}
/**
- * nand_scan_ident - [NAND Interface] Scan for the NAND device
+ * nand_scan_ident - 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.
*
+ * This helper used to be called directly from controller drivers that needed
+ * to tweak some ECC-related parameters before nand_scan_tail(). This separation
+ * prevented dynamic allocations during this phase which was unconvenient and
+ * as been banned for the benefit of the ->init_ecc()/cleanup_ecc() hooks.
*/
-int nand_scan_ident(struct mtd_info *mtd, int maxchips,
- struct nand_flash_dev *table)
+static int nand_scan_ident(struct mtd_info *mtd, int maxchips,
+ struct nand_flash_dev *table)
{
int i, nand_maf_id, nand_dev_id;
struct nand_chip *chip = mtd_to_nand(mtd);
return 0;
}
-EXPORT_SYMBOL(nand_scan_ident);
static int nand_set_ecc_soft_ops(struct mtd_info *mtd)
{
}
/**
- * nand_scan_tail - [NAND Interface] Scan for the NAND device
+ * nand_scan_tail - Scan for the NAND device
* @mtd: MTD device structure
*
* This is the second phase of the normal nand_scan() function. It fills out
* all the uninitialized function pointers with the defaults and scans for a
* bad block table if appropriate.
*/
-int nand_scan_tail(struct mtd_info *mtd)
+static int nand_scan_tail(struct mtd_info *mtd)
{
struct nand_chip *chip = mtd_to_nand(mtd);
struct nand_ecc_ctrl *ecc = &chip->ecc;
return ret;
}
-EXPORT_SYMBOL(nand_scan_tail);
static int nand_attach(struct nand_chip *chip)
{
return nand_scan_with_ids(mtd, max_chips, NULL);
}
-/*
- * Separate phases of nand_scan(), allowing board driver to intervene
- * and override command or ECC setup according to flash type.
- */
-int nand_scan_ident(struct mtd_info *mtd, int max_chips,
- struct nand_flash_dev *table);
-int nand_scan_tail(struct mtd_info *mtd);
-
-/* Unregister the MTD device and free resources held by the NAND device */
-void nand_release(struct mtd_info *mtd);
-
/* Internal helper for board drivers which need to override command function */
void nand_wait_ready(struct mtd_info *mtd);
int nand_write_data_op(struct nand_chip *chip, const void *buf,
unsigned int len, bool force_8bit);
-/* Free resources held by the NAND device */
+/*
+ * Free resources held by the NAND device, must be called on error after a
+ * sucessful nand_scan().
+ */
void nand_cleanup(struct nand_chip *chip);
+/* Unregister the MTD device and calls nand_cleanup() */
+void nand_release(struct mtd_info *mtd);
/* Default extended ID decoding function */
void nand_decode_ext_id(struct nand_chip *chip);