1 files changed, 64 insertions, 33 deletions

diff --git a/include/linux/mtd/mtd.h b/include/linux/mtd/mtd.h
index b6f2fdae65c6..e1d2a3d56546 100644
--- a/include/linux/mtd/mtd.h
+++ b/include/linux/mtd/mtd.h
@@ -56,18 +56,69 @@ struct mtd_erase_region_info {
         u_int32_t numblocks;            /* Number of blocks of erasesize in this region */
 };
 
+/*
+ * oob operation modes
+ *
+ * MTD_OOB_PLACE:       oob data are placed at the given offset
+ * MTD_OOB_AUTO:        oob data are automatically placed at the free areas
+ *                      which are defined by the ecclayout
+ * MTD_OOB_RAW:         mode to read raw data+oob in one chunk. The oob data
+ *                      is inserted into the data. Thats a raw image of the
+ *                      flash contents.
+ */
+typedef enum {
+        MTD_OOB_PLACE,
+        MTD_OOB_AUTO,
+        MTD_OOB_RAW,
+} mtd_oob_mode_t;
+
+/**
+ * struct mtd_oob_ops - oob operation operands
+ * @mode:       operation mode
+ *
+ * @len:        number of bytes to write/read. When a data buffer is given
+ *              (datbuf != NULL) this is the number of data bytes. When
+ +              no data buffer is available this is the number of oob bytes.
+ *
+ * @retlen:     number of bytes written/read. When a data buffer is given
+ *              (datbuf != NULL) this is the number of data bytes. When
+ +              no data buffer is available this is the number of oob bytes.
+ *
+ * @ooblen:     number of oob bytes per page
+ * @ooboffs:    offset of oob data in the oob area (only relevant when
+ *              mode = MTD_OOB_PLACE)
+ * @datbuf:     data buffer - if NULL only oob data are read/written
+ * @oobbuf:     oob data buffer
+ */
+struct mtd_oob_ops {
+        mtd_oob_mode_t  mode;
+        size_t          len;
+        size_t          retlen;
+        size_t          ooblen;
+        uint32_t        ooboffs;
+        uint8_t         *datbuf;
+        uint8_t         *oobbuf;
+};
+
 struct mtd_info {
         u_char type;
         u_int32_t flags;
         u_int32_t size;  // Total size of the MTD
 
-        /* "Major" erase size for the device. Naïve users may take this
+        /* "Major" erase size for the device. Naïve users may take this
          * to be the only erase size available, or may use the more detailed
          * information below if they desire
          */
         u_int32_t erasesize;
+        /* Minimal writable flash unit size. In case of NOR flash it is 1 (even
+         * though individual bits can be cleared), in case of NAND flash it is
+         * one NAND page (or half, or one-fourths of it), in case of ECC-ed NOR
+         * it is of ECC block size, etc. It is illegal to have writesize = 0.
+         * Any driver registering a struct mtd_info must ensure a writesize of
+         * 1 or larger.
+         */
+        u_int32_t writesize;
 
-        u_int32_t oobblock;  // Size of OOB blocks (e.g. 512)
         u_int32_t oobsize;   // Amount of OOB data per block (e.g. 16)
         u_int32_t ecctype;
         u_int32_t eccsize;
@@ -79,7 +130,6 @@ struct mtd_info {
          * MTD_PROGRAM_REGIONS flag is set.
          * (Maybe we should have an union for those?)
          */
-#define MTD_PROGREGION_SIZE(mtd)  (mtd)->oobblock
 #define MTD_PROGREGION_CTRLMODE_VALID(mtd)  (mtd)->oobsize
 #define MTD_PROGREGION_CTRLMODE_INVALID(mtd)  (mtd)->ecctype
 
@@ -87,9 +137,8 @@ struct mtd_info {
         char *name;
         int index;
 
-        // oobinfo is a nand_oobinfo structure, which can be set by iotcl (MEMSETOOBINFO)
-        struct nand_oobinfo oobinfo;
-        u_int32_t oobavail;  // Number of bytes in OOB area available for fs
+        /* ecc layout structure pointer - read only ! */
+        struct nand_ecclayout *ecclayout;
 
         /* Data for variable erase regions. If numeraseregions is zero,
          * it means that the whole device has erasesize as given above.
@@ -112,11 +161,10 @@ struct mtd_info {
         int (*read) (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf);
         int (*write) (struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, const u_char *buf);
 
-        int (*read_ecc) (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf, u_char *eccbuf, struct nand_oobinfo *oobsel);
-        int (*write_ecc) (struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, const u_char *buf, u_char *eccbuf, struct nand_oobinfo *oobsel);
-
-        int (*read_oob) (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf);
-        int (*write_oob) (struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, const u_char *buf);
+        int (*read_oob) (struct mtd_info *mtd, loff_t from,
+                         struct mtd_oob_ops *ops);
+        int (*write_oob) (struct mtd_info *mtd, loff_t to,
+                         struct mtd_oob_ops *ops);
 
         /*
          * Methods to access the protection register area, present in some
@@ -130,17 +178,11 @@ struct mtd_info {
         int (*write_user_prot_reg) (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf);
         int (*lock_user_prot_reg) (struct mtd_info *mtd, loff_t from, size_t len);
 
-        /* kvec-based read/write methods. We need these especially for NAND flash,
-           with its limited number of write cycles per erase.
+        /* kvec-based read/write methods.
            NB: The 'count' parameter is the number of _vectors_, each of
            which contains an (ofs, len) tuple.
         */
-        int (*readv) (struct mtd_info *mtd, struct kvec *vecs, unsigned long count, loff_t from, size_t *retlen);
-        int (*readv_ecc) (struct mtd_info *mtd, struct kvec *vecs, unsigned long count, loff_t from,
-                size_t *retlen, u_char *eccbuf, struct nand_oobinfo *oobsel);
         int (*writev) (struct mtd_info *mtd, const struct kvec *vecs, unsigned long count, loff_t to, size_t *retlen);
-        int (*writev_ecc) (struct mtd_info *mtd, const struct kvec *vecs, unsigned long count, loff_t to,
-                size_t *retlen, u_char *eccbuf, struct nand_oobinfo *oobsel);
 
         /* Sync */
         void (*sync) (struct mtd_info *mtd);
@@ -159,6 +201,9 @@ struct mtd_info {
 
         struct notifier_block reboot_notifier;  /* default mode before reboot */
 
+        /* ECC status information */
+        struct mtd_ecc_stats ecc_stats;
+
         void *priv;
 
         struct module *owner;
@@ -192,20 +237,6 @@ int default_mtd_writev(struct mtd_info *mtd, const struct kvec *vecs,
 int default_mtd_readv(struct mtd_info *mtd, struct kvec *vecs,
                       unsigned long count, loff_t from, size_t *retlen);
 
-#define MTD_ERASE(mtd, args...) (*(mtd->erase))(mtd, args)
-#define MTD_POINT(mtd, a,b,c,d) (*(mtd->point))(mtd, a,b,c, (u_char **)(d))
-#define MTD_UNPOINT(mtd, arg) (*(mtd->unpoint))(mtd, (u_char *)arg)
-#define MTD_READ(mtd, args...) (*(mtd->read))(mtd, args)
-#define MTD_WRITE(mtd, args...) (*(mtd->write))(mtd, args)
-#define MTD_READV(mtd, args...) (*(mtd->readv))(mtd, args)
-#define MTD_WRITEV(mtd, args...) (*(mtd->writev))(mtd, args)
-#define MTD_READECC(mtd, args...) (*(mtd->read_ecc))(mtd, args)
-#define MTD_WRITEECC(mtd, args...) (*(mtd->write_ecc))(mtd, args)
-#define MTD_READOOB(mtd, args...) (*(mtd->read_oob))(mtd, args)
-#define MTD_WRITEOOB(mtd, args...) (*(mtd->write_oob))(mtd, args)
-#define MTD_SYNC(mtd) do { if (mtd->sync) (*(mtd->sync))(mtd);  } while (0)
-
-
 #ifdef CONFIG_MTD_PARTITIONS
 void mtd_erase_callback(struct erase_info *instr);
 #else
@@ -226,7 +257,7 @@ static inline void mtd_erase_callback(struct erase_info *instr)
 
 #ifdef CONFIG_MTD_DEBUG
 #define DEBUG(n, args...)                               \
-        do {                                            \
+        do {                                            \
                 if (n <= CONFIG_MTD_DEBUG_VERBOSE)      \
                         printk(KERN_INFO args);         \
         } while(0)