X-Git-Url: http://pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=include%2Flinux%2Fmtd%2Fmtd.h;h=3d956c3abb310d06867abd729f8aacd0433be00b;hb=bdf3aaf9519ddd8a026b5e04e713d2fa673532e5;hp=94a443d45258485cf79e71f76c7d01bc2c39b2eb;hpb=cf57a308436653f3094590202c77459aab250ff3;p=linux-2.6-omap-h63xx.git

diff --git a/include/linux/mtd/mtd.h b/include/linux/mtd/mtd.h
index 94a443d4525..3d956c3abb3 100644
--- a/include/linux/mtd/mtd.h
+++ b/include/linux/mtd/mtd.h
@@ -23,7 +23,7 @@
 
 #define MTD_CHAR_MAJOR 90
 #define MTD_BLOCK_MAJOR 31
-#define MAX_MTD_DEVICES 16
+#define MAX_MTD_DEVICES 32
 
 #define MTD_ERASE_PENDING      	0x01
 #define MTD_ERASING		0x02
@@ -75,25 +75,27 @@ typedef enum {
  * 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.
+ * @len:	number of data bytes to write/read
  *
- * @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.
+ * @retlen:	number of data bytes written/read
  *
- * @ooblen:	number of oob bytes per page
+ * @ooblen:	number of oob bytes to write/read
+ * @oobretlen:	number of oob bytes written/read
  * @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
+ *
+ * Note, it is allowed to read more then one OOB area at one go, but not write.
+ * The interface assumes that the OOB write requests program only one page's
+ * OOB area.
  */
 struct mtd_oob_ops {
 	mtd_oob_mode_t	mode;
 	size_t		len;
 	size_t		retlen;
 	size_t		ooblen;
+	size_t		oobretlen;
 	uint32_t	ooboffs;
 	uint8_t		*datbuf;
 	uint8_t		*oobbuf;
@@ -119,18 +121,7 @@ struct mtd_info {
 	u_int32_t writesize;
 
 	u_int32_t oobsize;   // Amount of OOB data per block (e.g. 16)
-	u_int32_t ecctype;
-	u_int32_t eccsize;
-
-	/*
-	 * Reuse some of the above unused fields in the case of NOR flash
-	 * with configurable programming regions to avoid modifying the
-	 * user visible structure layout/size.  Only valid when the
-	 * MTD_PROGRAM_REGIONS flag is set.
-	 * (Maybe we should have an union for those?)
-	 */
-#define MTD_PROGREGION_CTRLMODE_VALID(mtd)  (mtd)->oobsize
-#define MTD_PROGREGION_CTRLMODE_INVALID(mtd)  (mtd)->ecctype
+	u_int32_t oobavail;  // Available OOB bytes per block
 
 	// Kernel-only stuff starts here.
 	char *name;
@@ -202,11 +193,20 @@ struct mtd_info {
 
 	/* ECC status information */
 	struct mtd_ecc_stats ecc_stats;
+	/* Subpage shift (NAND) */
+	int subpage_sft;
 
 	void *priv;
 
 	struct module *owner;
 	int usecount;
+
+	/* If the driver is something smart, like UBI, it may need to maintain
+	 * its own reference counting. The below functions are only for driver.
+	 * The driver may register its callbacks. These callbacks are not
+	 * supposed to be called by MTD users */
+	int (*get_device) (struct mtd_info *mtd);
+	void (*put_device) (struct mtd_info *mtd);
 };
 
 
@@ -216,6 +216,7 @@ extern int add_mtd_device(struct mtd_info *mtd);
 extern int del_mtd_device (struct mtd_info *mtd);
 
 extern struct mtd_info *get_mtd_device(struct mtd_info *mtd, int num);
+extern struct mtd_info *get_mtd_device_nm(const char *name);
 
 extern void put_mtd_device(struct mtd_info *mtd);