/*
- * $Id: mtd-abi.h,v 1.10 2005/02/09 09:17:42 pavlov Exp $
+ * $Id: mtd-abi.h,v 1.13 2005/11/07 11:14:56 gleixner Exp $
*
- * Portions of MTD ABI definition which are shared by kernel and user space
+ * Portions of MTD ABI definition which are shared by kernel and user space
*/
#ifndef __MTD_ABI_H__
#define __MTD_ABI_H__
-#ifndef __KERNEL__ /* Urgh. The whole point of splitting this out into
- separate files was to avoid #ifdef __KERNEL__ */
+#ifndef __KERNEL__
+/* Urgh. The whole point of splitting this out into
+ separate files was to avoid #ifdef __KERNEL__ */
#define __user
#endif
#define MTD_ROM 2
#define MTD_NORFLASH 3
#define MTD_NANDFLASH 4
-#define MTD_PEROM 5
#define MTD_DATAFLASH 6
-#define MTD_OTHER 14
-#define MTD_UNKNOWN 15
-
-#define MTD_CLEAR_BITS 1 // Bits can be cleared (flash)
-#define MTD_SET_BITS 2 // Bits can be set
-#define MTD_ERASEABLE 4 // Has an erase function
-#define MTD_WRITEB_WRITEABLE 8 // Direct IO is possible
-#define MTD_VOLATILE 16 // Set for RAMs
-#define MTD_XIP 32 // eXecute-In-Place possible
-#define MTD_OOB 64 // Out-of-band data (NAND flash)
-#define MTD_ECC 128 // Device capable of automatic ECC
-#define MTD_NO_VIRTBLOCKS 256 // Virtual blocks not allowed
+
+#define MTD_WRITEABLE 0x400 /* Device is writeable */
+#define MTD_BIT_WRITEABLE 0x800 /* Single bits can be flipped */
+#define MTD_NO_ERASE 0x1000 /* No erase necessary */
+#define MTD_STUPID_LOCK 0x2000 /* Always locked after reset */
// Some common devices / combinations of capabilities
#define MTD_CAP_ROM 0
-#define MTD_CAP_RAM (MTD_CLEAR_BITS|MTD_SET_BITS|MTD_WRITEB_WRITEABLE)
-#define MTD_CAP_NORFLASH (MTD_CLEAR_BITS|MTD_ERASEABLE)
-#define MTD_CAP_NANDFLASH (MTD_CLEAR_BITS|MTD_ERASEABLE|MTD_OOB)
-#define MTD_WRITEABLE (MTD_CLEAR_BITS|MTD_SET_BITS)
+#define MTD_CAP_RAM (MTD_WRITEABLE | MTD_BIT_WRITEABLE | MTD_NO_ERASE)
+#define MTD_CAP_NORFLASH (MTD_WRITEABLE | MTD_BIT_WRITEABLE)
+#define MTD_CAP_NANDFLASH (MTD_WRITEABLE)
// Types of automatic ECC/Checksum available
#define MTD_NANDECC_PLACE 1 // Use the given placement in the structure (YAFFS1 legacy mode)
#define MTD_NANDECC_AUTOPLACE 2 // Use the default placement scheme
#define MTD_NANDECC_PLACEONLY 3 // Use the given placement in the structure (Do not store ecc result on read)
+#define MTD_NANDECC_AUTOPL_USR 4 // Use the given autoplacement scheme rather than using the default
/* OTP mode selection */
#define MTD_OTP_OFF 0
uint32_t flags;
uint32_t size; // Total size of the MTD
uint32_t erasesize;
- uint32_t oobblock; // Size of OOB blocks (e.g. 512)
+ uint32_t writesize;
uint32_t oobsize; // Amount of OOB data per block (e.g. 16)
uint32_t ecctype;
uint32_t eccsize;
};
struct region_info_user {
- uint32_t offset; /* At which this region starts,
+ uint32_t offset; /* At which this region starts,
* from the beginning of the MTD */
uint32_t erasesize; /* For this region */
uint32_t numblocks; /* Number of blocks in this region */
uint32_t locked;
};
-#define MEMGETINFO _IOR('M', 1, struct mtd_info_user)
-#define MEMERASE _IOW('M', 2, struct erase_info_user)
-#define MEMWRITEOOB _IOWR('M', 3, struct mtd_oob_buf)
-#define MEMREADOOB _IOWR('M', 4, struct mtd_oob_buf)
-#define MEMLOCK _IOW('M', 5, struct erase_info_user)
-#define MEMUNLOCK _IOW('M', 6, struct erase_info_user)
+#define MEMGETINFO _IOR('M', 1, struct mtd_info_user)
+#define MEMERASE _IOW('M', 2, struct erase_info_user)
+#define MEMWRITEOOB _IOWR('M', 3, struct mtd_oob_buf)
+#define MEMREADOOB _IOWR('M', 4, struct mtd_oob_buf)
+#define MEMLOCK _IOW('M', 5, struct erase_info_user)
+#define MEMUNLOCK _IOW('M', 6, struct erase_info_user)
#define MEMGETREGIONCOUNT _IOR('M', 7, int)
#define MEMGETREGIONINFO _IOWR('M', 8, struct region_info_user)
#define MEMSETOOBSEL _IOW('M', 9, struct nand_oobinfo)
#define OTPSELECT _IOR('M', 13, int)
#define OTPGETREGIONCOUNT _IOW('M', 14, int)
#define OTPGETREGIONINFO _IOW('M', 15, struct otp_info)
-#define OTPLOCK _IOR('M', 16, struct otp_info)
+#define OTPLOCK _IOR('M', 16, struct otp_info)
+#define ECCGETLAYOUT _IOR('M', 17, struct nand_ecclayout)
+#define ECCGETSTATS _IOR('M', 18, struct mtd_ecc_stats)
+#define MTDFILEMODE _IO('M', 19)
+/*
+ * Obsolete legacy interface. Keep it in order not to break userspace
+ * interfaces
+ */
struct nand_oobinfo {
uint32_t useecc;
uint32_t eccbytes;
uint32_t eccpos[32];
};
+struct nand_oobfree {
+ uint32_t offset;
+ uint32_t length;
+};
+
+#define MTD_MAX_OOBFREE_ENTRIES 8
+/*
+ * ECC layout control structure. Exported to userspace for
+ * diagnosis and to allow creation of raw images
+ */
+struct nand_ecclayout {
+ uint32_t eccbytes;
+ uint32_t eccpos[64];
+ uint32_t oobavail;
+ struct nand_oobfree oobfree[MTD_MAX_OOBFREE_ENTRIES];
+};
+
+/**
+ * struct mtd_ecc_stats - error correction stats
+ *
+ * @corrected: number of corrected bits
+ * @failed: number of uncorrectable errors
+ * @badblocks: number of bad blocks in this partition
+ * @bbtblocks: number of blocks reserved for bad block tables
+ */
+struct mtd_ecc_stats {
+ uint32_t corrected;
+ uint32_t failed;
+ uint32_t badblocks;
+ uint32_t bbtblocks;
+};
+
+/*
+ * Read/write file modes for access to MTD
+ */
+enum mtd_file_modes {
+ MTD_MODE_NORMAL = MTD_OTP_OFF,
+ MTD_MODE_OTP_FACTORY = MTD_OTP_FACTORY,
+ MTD_MODE_OTP_USER = MTD_OTP_USER,
+ MTD_MODE_RAW,
+};
+
#endif /* __MTD_ABI_H__ */
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