mtd: onenand: add bbt_wait & unlock_all as replaceable for some platform

Add bbt_wait & unlock_all as replaceable for some platform such as
  s3c64xx s3c64xx has its own OneNAND controller and another interface

Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

2 files changed, 15 insertions, 2 deletions

diff --git a/drivers/mtd/onenand/onenand_base.c b/drivers/mtd/onenand/onenand_base.c
index 8d4c9c253732..864327ed7fb3 100644
--- a/drivers/mtd/onenand/onenand_base.c
+++ b/drivers/mtd/onenand/onenand_base.c
@@ -1506,7 +1506,7 @@ int onenand_bbt_read_oob(struct mtd_info *mtd, loff_t from,
 
                 onenand_update_bufferram(mtd, from, 0);
 
-                ret = onenand_bbt_wait(mtd, FL_READING);
+                ret = this->bbt_wait(mtd, FL_READING);
                 if (unlikely(ret))
                         ret = onenand_recover_lsb(mtd, from, ret);
 
@@ -2527,6 +2527,10 @@ static void onenand_unlock_all(struct mtd_info *mtd)
                     & ONENAND_CTRL_ONGO)
                         continue;
 
+                /* Don't check lock status */
+                if (this->options & ONENAND_SKIP_UNLOCK_CHECK)
+                        return;
+
                 /* Check lock status */
                 if (onenand_check_lock_status(this))
                         return;
@@ -3442,6 +3446,10 @@ int onenand_scan(struct mtd_info *mtd, int maxchips)
                 this->command = onenand_command;
         if (!this->wait)
                 onenand_setup_wait(mtd);
+        if (!this->bbt_wait)
+                this->bbt_wait = onenand_bbt_wait;
+        if (!this->unlock_all)
+                this->unlock_all = onenand_unlock_all;
 
         if (!this->read_bufferram)
                 this->read_bufferram = onenand_read_bufferram;
@@ -3559,7 +3567,7 @@ int onenand_scan(struct mtd_info *mtd, int maxchips)
         mtd->owner = THIS_MODULE;
 
         /* Unlock whole block */
-        onenand_unlock_all(mtd);
+        this->unlock_all(mtd);
 
         ret = this->scan_bbt(mtd);
         if ((!FLEXONENAND(this)) || ret)
diff --git a/include/linux/mtd/onenand.h b/include/linux/mtd/onenand.h
index 9aab82c1c743..8ed873374381 100644
--- a/include/linux/mtd/onenand.h
+++ b/include/linux/mtd/onenand.h
@@ -74,6 +74,8 @@ struct onenand_bufferram {
  * @command:            [REPLACEABLE] hardware specific function for writing
  *                      commands to the chip
  * @wait:               [REPLACEABLE] hardware specific function for wait on ready
+ * @bbt_wait:           [REPLACEABLE] hardware specific function for bbt wait on ready
+ * @unlock_all:         [REPLACEABLE] hardware specific function for unlock all
  * @read_bufferram:     [REPLACEABLE] hardware specific function for BufferRAM Area
  * @write_bufferram:    [REPLACEABLE] hardware specific function for BufferRAM Area
  * @read_word:          [REPLACEABLE] hardware specific function for read
@@ -118,6 +120,8 @@ struct onenand_chip {
 
         int (*command)(struct mtd_info *mtd, int cmd, loff_t address, size_t len);
         int (*wait)(struct mtd_info *mtd, int state);
+        int (*bbt_wait)(struct mtd_info *mtd, int state);
+        void (*unlock_all)(struct mtd_info *mtd);
         int (*read_bufferram)(struct mtd_info *mtd, int area,
                         unsigned char *buffer, int offset, size_t count);
         int (*write_bufferram)(struct mtd_info *mtd, int area,
@@ -184,6 +188,7 @@ struct onenand_chip {
 #define ONENAND_HAS_CONT_LOCK           (0x0001)
 #define ONENAND_HAS_UNLOCK_ALL          (0x0002)
 #define ONENAND_HAS_2PLANE              (0x0004)
+#define ONENAND_SKIP_UNLOCK_CHECK       (0x0100)
 #define ONENAND_PAGEBUF_ALLOC           (0x1000)
 #define ONENAND_OOBBUF_ALLOC            (0x2000)