1 files changed, 278 insertions, 0 deletions

diff --git a/include/uapi/mtd/mtd-abi.h b/include/uapi/mtd/mtd-abi.h
new file mode 100644
index 000000000000..36eace03b2ac
--- /dev/null
+++ b/include/uapi/mtd/mtd-abi.h
@@ -0,0 +1,278 @@
+/*
+ * Copyright © 1999-2010 David Woodhouse <dwmw2@infradead.org> et al.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ */
+
+#ifndef __MTD_ABI_H__
+#define __MTD_ABI_H__
+
+#include <linux/types.h>
+
+struct erase_info_user {
+        __u32 start;
+        __u32 length;
+};
+
+struct erase_info_user64 {
+        __u64 start;
+        __u64 length;
+};
+
+struct mtd_oob_buf {
+        __u32 start;
+        __u32 length;
+        unsigned char __user *ptr;
+};
+
+struct mtd_oob_buf64 {
+        __u64 start;
+        __u32 pad;
+        __u32 length;
+        __u64 usr_ptr;
+};
+
+/**
+ * MTD operation modes
+ *
+ * @MTD_OPS_PLACE_OOB:  OOB data are placed at the given offset (default)
+ * @MTD_OPS_AUTO_OOB:   OOB data are automatically placed at the free areas
+ *                      which are defined by the internal ecclayout
+ * @MTD_OPS_RAW:        data are transferred as-is, with no error correction;
+ *                      this mode implies %MTD_OPS_PLACE_OOB
+ *
+ * These modes can be passed to ioctl(MEMWRITE) and are also used internally.
+ * See notes on "MTD file modes" for discussion on %MTD_OPS_RAW vs.
+ * %MTD_FILE_MODE_RAW.
+ */
+enum {
+        MTD_OPS_PLACE_OOB = 0,
+        MTD_OPS_AUTO_OOB = 1,
+        MTD_OPS_RAW = 2,
+};
+
+/**
+ * struct mtd_write_req - data structure for requesting a write operation
+ *
+ * @start:      start address
+ * @len:        length of data buffer
+ * @ooblen:     length of OOB buffer
+ * @usr_data:   user-provided data buffer
+ * @usr_oob:    user-provided OOB buffer
+ * @mode:       MTD mode (see "MTD operation modes")
+ * @padding:    reserved, must be set to 0
+ *
+ * This structure supports ioctl(MEMWRITE) operations, allowing data and/or OOB
+ * writes in various modes. To write to OOB-only, set @usr_data == NULL, and to
+ * write data-only, set @usr_oob == NULL. However, setting both @usr_data and
+ * @usr_oob to NULL is not allowed.
+ */
+struct mtd_write_req {
+        __u64 start;
+        __u64 len;
+        __u64 ooblen;
+        __u64 usr_data;
+        __u64 usr_oob;
+        __u8 mode;
+        __u8 padding[7];
+};
+
+#define MTD_ABSENT              0
+#define MTD_RAM                 1
+#define MTD_ROM                 2
+#define MTD_NORFLASH            3
+#define MTD_NANDFLASH           4
+#define MTD_DATAFLASH           6
+#define MTD_UBIVOLUME           7
+#define MTD_MLCNANDFLASH        8
+
+#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_POWERUP_LOCK        0x2000  /* Always locked after reset */
+
+/* Some common devices / combinations of capabilities */
+#define MTD_CAP_ROM             0
+#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)
+
+/* Obsolete ECC byte placement modes (used with obsolete MEMGETOOBSEL) */
+#define MTD_NANDECC_OFF         0       // Switch off ECC (Not recommended)
+#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
+#define MTD_OTP_FACTORY         1
+#define MTD_OTP_USER            2
+
+struct mtd_info_user {
+        __u8 type;
+        __u32 flags;
+        __u32 size;     /* Total size of the MTD */
+        __u32 erasesize;
+        __u32 writesize;
+        __u32 oobsize;  /* Amount of OOB data per block (e.g. 16) */
+        __u64 padding;  /* Old obsolete field; do not use */
+};
+
+struct region_info_user {
+        __u32 offset;           /* At which this region starts,
+                                 * from the beginning of the MTD */
+        __u32 erasesize;        /* For this region */
+        __u32 numblocks;        /* Number of blocks in this region */
+        __u32 regionindex;
+};
+
+struct otp_info {
+        __u32 start;
+        __u32 length;
+        __u32 locked;
+};
+
+/*
+ * Note, the following ioctl existed in the past and was removed:
+ * #define MEMSETOOBSEL           _IOW('M', 9, struct nand_oobinfo)
+ * Try to avoid adding a new ioctl with the same ioctl number.
+ */
+
+/* Get basic MTD characteristics info (better to use sysfs) */
+#define MEMGETINFO              _IOR('M', 1, struct mtd_info_user)
+/* Erase segment of MTD */
+#define MEMERASE                _IOW('M', 2, struct erase_info_user)
+/* Write out-of-band data from MTD */
+#define MEMWRITEOOB             _IOWR('M', 3, struct mtd_oob_buf)
+/* Read out-of-band data from MTD */
+#define MEMREADOOB              _IOWR('M', 4, struct mtd_oob_buf)
+/* Lock a chip (for MTD that supports it) */
+#define MEMLOCK                 _IOW('M', 5, struct erase_info_user)
+/* Unlock a chip (for MTD that supports it) */
+#define MEMUNLOCK               _IOW('M', 6, struct erase_info_user)
+/* Get the number of different erase regions */
+#define MEMGETREGIONCOUNT       _IOR('M', 7, int)
+/* Get information about the erase region for a specific index */
+#define MEMGETREGIONINFO        _IOWR('M', 8, struct region_info_user)
+/* Get info about OOB modes (e.g., RAW, PLACE, AUTO) - legacy interface */
+#define MEMGETOOBSEL            _IOR('M', 10, struct nand_oobinfo)
+/* Check if an eraseblock is bad */
+#define MEMGETBADBLOCK          _IOW('M', 11, __kernel_loff_t)
+/* Mark an eraseblock as bad */
+#define MEMSETBADBLOCK          _IOW('M', 12, __kernel_loff_t)
+/* Set OTP (One-Time Programmable) mode (factory vs. user) */
+#define OTPSELECT               _IOR('M', 13, int)
+/* Get number of OTP (One-Time Programmable) regions */
+#define OTPGETREGIONCOUNT       _IOW('M', 14, int)
+/* Get all OTP (One-Time Programmable) info about MTD */
+#define OTPGETREGIONINFO        _IOW('M', 15, struct otp_info)
+/* Lock a given range of user data (must be in mode %MTD_FILE_MODE_OTP_USER) */
+#define OTPLOCK                 _IOR('M', 16, struct otp_info)
+/* Get ECC layout (deprecated) */
+#define ECCGETLAYOUT            _IOR('M', 17, struct nand_ecclayout_user)
+/* Get statistics about corrected/uncorrected errors */
+#define ECCGETSTATS             _IOR('M', 18, struct mtd_ecc_stats)
+/* Set MTD mode on a per-file-descriptor basis (see "MTD file modes") */
+#define MTDFILEMODE             _IO('M', 19)
+/* Erase segment of MTD (supports 64-bit address) */
+#define MEMERASE64              _IOW('M', 20, struct erase_info_user64)
+/* Write data to OOB (64-bit version) */
+#define MEMWRITEOOB64           _IOWR('M', 21, struct mtd_oob_buf64)
+/* Read data from OOB (64-bit version) */
+#define MEMREADOOB64            _IOWR('M', 22, struct mtd_oob_buf64)
+/* Check if chip is locked (for MTD that supports it) */
+#define MEMISLOCKED             _IOR('M', 23, struct erase_info_user)
+/*
+ * Most generic write interface; can write in-band and/or out-of-band in various
+ * modes (see "struct mtd_write_req"). This ioctl is not supported for flashes
+ * without OOB, e.g., NOR flash.
+ */
+#define MEMWRITE                _IOWR('M', 24, struct mtd_write_req)
+
+/*
+ * Obsolete legacy interface. Keep it in order not to break userspace
+ * interfaces
+ */
+struct nand_oobinfo {
+        __u32 useecc;
+        __u32 eccbytes;
+        __u32 oobfree[8][2];
+        __u32 eccpos[32];
+};
+
+struct nand_oobfree {
+        __u32 offset;
+        __u32 length;
+};
+
+#define MTD_MAX_OOBFREE_ENTRIES 8
+#define MTD_MAX_ECCPOS_ENTRIES  64
+/*
+ * OBSOLETE: ECC layout control structure. Exported to user-space via ioctl
+ * ECCGETLAYOUT for backwards compatbility and should not be mistaken as a
+ * complete set of ECC information. The ioctl truncates the larger internal
+ * structure to retain binary compatibility with the static declaration of the
+ * ioctl. Note that the "MTD_MAX_..._ENTRIES" macros represent the max size of
+ * the user struct, not the MAX size of the internal struct nand_ecclayout.
+ */
+struct nand_ecclayout_user {
+        __u32 eccbytes;
+        __u32 eccpos[MTD_MAX_ECCPOS_ENTRIES];
+        __u32 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 {
+        __u32 corrected;
+        __u32 failed;
+        __u32 badblocks;
+        __u32 bbtblocks;
+};
+
+/*
+ * MTD file modes - for read/write access to MTD
+ *
+ * @MTD_FILE_MODE_NORMAL:       OTP disabled, ECC enabled
+ * @MTD_FILE_MODE_OTP_FACTORY:  OTP enabled in factory mode
+ * @MTD_FILE_MODE_OTP_USER:     OTP enabled in user mode
+ * @MTD_FILE_MODE_RAW:          OTP disabled, ECC disabled
+ *
+ * These modes can be set via ioctl(MTDFILEMODE). The mode mode will be retained
+ * separately for each open file descriptor.
+ *
+ * Note: %MTD_FILE_MODE_RAW provides the same functionality as %MTD_OPS_RAW -
+ * raw access to the flash, without error correction or autoplacement schemes.
+ * Wherever possible, the MTD_OPS_* mode will override the MTD_FILE_MODE_* mode
+ * (e.g., when using ioctl(MEMWRITE)), but in some cases, the MTD_FILE_MODE is
+ * used out of necessity (e.g., `write()', ioctl(MEMWRITEOOB64)).
+ */
+enum mtd_file_modes {
+        MTD_FILE_MODE_NORMAL = MTD_OTP_OFF,
+        MTD_FILE_MODE_OTP_FACTORY = MTD_OTP_FACTORY,
+        MTD_FILE_MODE_OTP_USER = MTD_OTP_USER,
+        MTD_FILE_MODE_RAW,
+};
+
+#endif /* __MTD_ABI_H__ */