[MTD] NAND Add read/write function pointers to struct nand_ecc_ctrl

Add read/write function pointers to struct nand_ecc_ctrl to
prepare the modulaization of nand_read/write functions. The
current implementation handles every type of ecc mode
software/hardware and all kinds of strange ecc placement
schemes in one switch/if construct. Thats too complex to
maintain and too inflexible to expand. Modularization will
also shorten the code pathes of the read/write functions.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h
index 2fd85d5..daacde5 100644 (file)
--- a/include/linux/mtd/nand.h
+++ b/include/linux/mtd/nand.h
@@ -233,16 +233,23 @@ struct nand_hw_control {
  * @steps:     number of ecc steps per page
  * @size:      data bytes per ecc step
  * @bytes:     ecc bytes per step
+ * @total:     total number of ecc bytes per page
+ * @prepad:    padding information for syndrome based ecc generators
+ * @postpad:   padding information for syndrome based ecc generators
  * @hwctl:     function to control hardware ecc generator. Must only
  *             be provided if an hardware ECC is available
  * @calculate: function for ecc calculation or readback from ecc hardware
  * @correct:   function for ecc correction, matching to ecc generator (sw/hw)
+ * @write_page:        function to write a page according to the ecc generator requirements
  */
 struct nand_ecc_ctrl {
        nand_ecc_modes_t        mode;
        int                     steps;
        int                     size;
        int                     bytes;
+       int                     total;
+       int                     prepad;
+       int                     postpad;
        void                    (*hwctl)(struct mtd_info *mtd, int mode);
        int                     (*calculate)(struct mtd_info *mtd,
                                             const uint8_t *dat,
@@ -250,6 +257,12 @@ struct nand_ecc_ctrl {
        int                     (*correct)(struct mtd_info *mtd, uint8_t *dat,
                                           uint8_t *read_ecc,
                                           uint8_t *calc_ecc);
+       int                     (*read_page)(struct mtd_info *mtd,
+                                            struct nand_chip *chip,
+                                            uint8_t *buf);
+       int                     (*write_page)(struct mtd_info *mtd,
+                                             struct nand_chip *chip,
+                                             uint8_t *buf, int cached);
 };
 
 /**