[MTD] NAND: Combined oob buffer so it's contiguous with data

[sfrench/cifs-2.6.git] / include / linux / mtd / nand.h

diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h
index 0b4cd2fa64aa6cf5a1b6da709b761ab8f2234fc8..6fc3e07497e0175aa49f6ffe856c9131bbc30f7b 100644 (file)
--- a/include/linux/mtd/nand.h
+++ b/include/linux/mtd/nand.h
@@ -27,9 +27,17 @@
 struct mtd_info;
 /* Scan and identify a NAND device */
 extern int nand_scan (struct mtd_info *mtd, int max_chips);
+/* Separate phases of nand_scan(), allowing board driver to intervene
+ * and override command or ECC setup according to flash type */
+extern int nand_scan_ident(struct mtd_info *mtd, int max_chips);
+extern int nand_scan_tail(struct mtd_info *mtd);
+
 /* Free resources held by the NAND device */
 extern void nand_release (struct mtd_info *mtd);
 
+/* Internal helper for board drivers which need to override command function */
+extern void nand_wait_ready(struct mtd_info *mtd);
+
 /* The maximum number of NAND chips in an array */
 #define NAND_MAX_CHIPS         8
 
@@ -178,7 +186,9 @@ typedef enum {
 #define NAND_USE_FLASH_BBT     0x00010000
 /* This option skips the bbt scan during initialization. */
 #define NAND_SKIP_BBTSCAN      0x00020000
-
+/* This option is defined if the board driver allocates its own buffers
+   (e.g. because it needs them DMA-coherent */
+#define NAND_OWN_BUFFERS       0x00040000
 /* Options set by nand scan */
 /* Nand scan has allocated controller struct */
 #define NAND_CONTROLLER_ALLOC  0x80000000
@@ -228,6 +238,8 @@ struct nand_hw_control {
  *             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)
+ * @read_page_raw:     function to read a raw page without ECC
+ * @write_page_raw:    function to write a raw page without ECC
  * @read_page: function to read a page according to the ecc generator requirements
  * @write_page:        function to write a page according to the ecc generator requirements
  * @read_oob:  function to read chip OOB data
@@ -249,6 +261,12 @@ struct nand_ecc_ctrl {
        int                     (*correct)(struct mtd_info *mtd, uint8_t *dat,
                                           uint8_t *read_ecc,
                                           uint8_t *calc_ecc);
+       int                     (*read_page_raw)(struct mtd_info *mtd,
+                                                struct nand_chip *chip,
+                                                uint8_t *buf);
+       void                    (*write_page_raw)(struct mtd_info *mtd,
+                                                 struct nand_chip *chip,
+                                                 const uint8_t *buf);
        int                     (*read_page)(struct mtd_info *mtd,
                                             struct nand_chip *chip,
                                             uint8_t *buf);
@@ -268,9 +286,7 @@ struct nand_ecc_ctrl {
  * struct nand_buffers - buffer structure for read/write
  * @ecccalc:   buffer for calculated ecc
  * @ecccode:   buffer for ecc read from flash
- * @oobwbuf:   buffer for write oob data
  * @databuf:   buffer for data - dynamically sized
- * @oobrbuf:   buffer to read oob data
  *
  * Do not change the order of buffers. databuf and oobrbuf must be in
  * consecutive order.
@@ -278,9 +294,7 @@ struct nand_ecc_ctrl {
 struct nand_buffers {
        uint8_t ecccalc[NAND_MAX_OOBSIZE];
        uint8_t ecccode[NAND_MAX_OOBSIZE];
-       uint8_t oobwbuf[NAND_MAX_OOBSIZE];
-       uint8_t databuf[NAND_MAX_PAGESIZE];
-       uint8_t oobrbuf[NAND_MAX_OOBSIZE];
+       uint8_t databuf[NAND_MAX_PAGESIZE + NAND_MAX_OOBSIZE];
 };
 
 /**
@@ -337,6 +351,7 @@ struct nand_buffers {
  * @priv:              [OPTIONAL] pointer to private chip date
  * @errstat:           [OPTIONAL] hardware specific function to perform additional error status checks
  *                     (determine if errors are correctable)
+ * @write_page         [REPLACEABLE] High-level page write function
  */
 
 struct nand_chip {
@@ -359,6 +374,8 @@ struct nand_chip {
        void            (*erase_cmd)(struct mtd_info *mtd, int page);
        int             (*scan_bbt)(struct mtd_info *mtd);
        int             (*errstat)(struct mtd_info *mtd, struct nand_chip *this, int state, int status, int page);
+       int             (*write_page)(struct mtd_info *mtd, struct nand_chip *chip,
+                                     const uint8_t *buf, int page, int cached, int raw);
 
        int             chip_delay;
        unsigned int    options;
@@ -380,7 +397,7 @@ struct nand_chip {
        struct nand_ecclayout   *ecclayout;
 
        struct nand_ecc_ctrl ecc;
-       struct nand_buffers buffers;
+       struct nand_buffers *buffers;
        struct nand_hw_control hwcontrol;
 
        struct mtd_oob_ops ops;