mtd: resync with Linux-3.7.1

This patch is essentially an update of u-boot MTD subsystem to
the state of Linux-3.7.1 with exclusion of some bits:

- the update is concentrated on NAND, no onenand or CFI/NOR/SPI
flashes interfaces are updated EXCEPT for API changes.

- new large NAND chips support is there, though some updates
have got in Linux-3.8.-rc1, (which will follow on top of this patch).

To produce this update I used tag v3.7.1 of linux-stable repository.

The update was made using application of relevant patches,
with changes relevant to U-Boot-only stuff sticked together
to keep bisectability. Then all changes were grouped together
to this patch.

Signed-off-by: Sergey Lapin <slapin@ossfans.org>
[scottwood@freescale.com: some eccstrength and build fixes]
Signed-off-by: Scott Wood <scottwood@freescale.com>

1 files changed, 209 insertions, 0 deletions

diff --git a/include/mtd/mtd-abi.h b/include/mtd/mtd-abi.h
new file mode 100644
index 0000000..d51c1ab
--- /dev/null
+++ b/include/mtd/mtd-abi.h
@@ -0,0 +1,209 @@
+/*
+ * $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
+ */
+
+#ifndef __MTD_ABI_H__
+#define __MTD_ABI_H__
+
+#if 1
+#include <linux/compat.h>
+#endif
+
+#include <linux/compiler.h>
+
+struct erase_info_user {
+	uint32_t start;
+	uint32_t length;
+};
+
+struct mtd_oob_buf {
+	uint32_t start;
+	uint32_t length;
+	unsigned char __user *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,
+};
+
+#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_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_WRITEABLE | MTD_BIT_WRITEABLE | MTD_NO_ERASE)
+#define MTD_CAP_NORFLASH	(MTD_WRITEABLE | MTD_BIT_WRITEABLE)
+#define MTD_CAP_NANDFLASH	(MTD_WRITEABLE)
+
+/* ECC byte placement */
+#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 {
+	uint8_t type;
+	uint32_t flags;
+	uint32_t size;			/* Total size of the MTD */
+	uint32_t erasesize;
+	uint32_t writesize;
+	uint32_t oobsize;		/* Amount of OOB data per block (e.g. 16) */
+	/* The below two fields are obsolete and broken, do not use them
+	 * (TODO: remove at some point) */
+	uint32_t ecctype;
+	uint32_t eccsize;
+};
+
+struct region_info_user {
+	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 regionindex;
+};
+
+struct otp_info {
+	uint32_t start;
+	uint32_t length;
+	uint32_t locked;
+};
+
+/* 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 MEMSETOOBSEL		_IOW('M', 9, struct nand_oobinfo)
+#define MEMGETOOBSEL		_IOR('M', 10, struct nand_oobinfo)
+/* Check if an eraseblock is bad */
+#define MEMGETBADBLOCK		_IOW('M', 11, loff_t)
+/* Mark an eraseblock as bad */
+#define MEMSETBADBLOCK		_IOW('M', 12, 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)
+/* 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)
+
+/*
+ * Obsolete legacy interface. Keep it in order not to break userspace
+ * interfaces
+ */
+struct nand_oobinfo {
+	uint32_t useecc;
+	uint32_t eccbytes;
+	uint32_t oobfree[8][2];
+	uint32_t eccpos[48];
+};
+
+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[128];
+	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;
+};
+
+/*
+ * 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_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__ */