[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>

1 files changed, 13 insertions, 0 deletions

diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h
index 2fd85d55803d..daacde5132fe 100644
--- 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);
 };
 
 /**