NAND: sync with 2.6.27

This brings the core NAND code up to date with the Linux kernel.

Since there were several drivers in Linux as of the last update that are
not in u-boot, I'm not bringing over new drivers that have been added
since in the absence of an interested party.

I did not update OneNAND since it was recently synced by Kyungmin Park,
and I'm not sure exactly what the common ancestor is.

Signed-off-by: Scott Wood <scottwood@freescale.com>

8 files changed, 47 insertions, 17 deletions

diff --git a/include/linux/mtd/blktrans.h b/include/linux/mtd/blktrans.h
index d1ded51..32acb6c 100644
--- a/include/linux/mtd/blktrans.h
+++ b/include/linux/mtd/blktrans.h
@@ -1,6 +1,4 @@
 /*
- * $Id: blktrans.h,v 1.6 2005/11/07 11:14:54 gleixner Exp $
- *
  * (C) 2003 David Woodhouse <dwmw2@infradead.org>
  *
  * Interface to Linux block layer for MTD 'translation layers'.
diff --git a/include/linux/mtd/doc2000.h b/include/linux/mtd/doc2000.h
index 12de284..ba29d53 100644
--- a/include/linux/mtd/doc2000.h
+++ b/include/linux/mtd/doc2000.h
@@ -6,8 +6,6 @@
  * Copyright (C) 2002-2003 Greg Ungerer <gerg@snapgear.com>
  * Copyright (C) 2002-2003 SnapGear Inc
  *
- * $Id: doc2000.h,v 1.25 2005/11/07 11:14:54 gleixner Exp $
- *
  * Released under GPL
  */
 
diff --git a/include/linux/mtd/mtd.h b/include/linux/mtd/mtd.h
index 55d33dd..354e3a0 100644
--- a/include/linux/mtd/mtd.h
+++ b/include/linux/mtd/mtd.h
@@ -1,6 +1,4 @@
 /*
- * $Id: mtd.h,v 1.61 2005/11/07 11:14:54 gleixner Exp $
- *
  * Copyright (C) 1999-2003 David Woodhouse <dwmw2@infradead.org> et al.
  *
  * Released under GPL
@@ -132,7 +130,7 @@ struct mtd_info {
 	u_int32_t oobavail;  /* Available OOB bytes per block */
 
 	/* Kernel-only stuff starts here. */
-	char *name;
+	const char *name;
 	int index;
 
 	/* ecc layout structure pointer - read only ! */
@@ -144,18 +142,36 @@ struct mtd_info {
 	int numeraseregions;
 	struct mtd_erase_region_info *eraseregions;
 
+	/*
+	 * Erase is an asynchronous operation.  Device drivers are supposed
+	 * to call instr->callback() whenever the operation completes, even
+	 * if it completes with a failure.
+	 * Callers are supposed to pass a callback function and wait for it
+	 * to be called before writing to the block.
+	 */
 	int (*erase) (struct mtd_info *mtd, struct erase_info *instr);
 
 	/* This stuff for eXecute-In-Place */
-	int (*point) (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char **mtdbuf);
+	/* phys is optional and may be set to NULL */
+	int (*point) (struct mtd_info *mtd, loff_t from, size_t len,
+			size_t *retlen, void **virt, phys_addr_t *phys);
 
 	/* We probably shouldn't allow XIP if the unpoint isn't a NULL */
-	void (*unpoint) (struct mtd_info *mtd, u_char * addr, loff_t from, size_t len);
+	void (*unpoint) (struct mtd_info *mtd, loff_t from, size_t len);
 
 
 	int (*read) (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf);
 	int (*write) (struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, const u_char *buf);
 
+	/* In blackbox flight recorder like scenarios we want to make successful
+	   writes in interrupt context. panic_write() is only intended to be
+	   called when its known the kernel is about to panic and we need the
+	   write to succeed. Since the kernel is not going to be running for much
+	   longer, this function can break locks and delay to ensure the write
+	   succeeds (but not sleep). */
+
+	int (*panic_write) (struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, const u_char *buf);
+
 	int (*read_oob) (struct mtd_info *mtd, loff_t from,
 			 struct mtd_oob_ops *ops);
 	int (*write_oob) (struct mtd_info *mtd, loff_t to,
@@ -274,7 +290,11 @@ static inline void mtd_erase_callback(struct erase_info *instr)
 			printk(KERN_INFO args);		\
 	} while(0)
 #else /* CONFIG_MTD_DEBUG */
-#define MTDDEBUG(n, args...) do { } while(0)
+#define MTDDEBUG(n, args...)				\
+	do {						\
+		if (0)					\
+			printk(KERN_INFO args);		\
+	} while(0)
 #endif /* CONFIG_MTD_DEBUG */
 
 #endif /* __MTD_MTD_H__ */
diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h
index 7ac72de..39f8aec 100644
--- a/include/linux/mtd/nand.h
+++ b/include/linux/mtd/nand.h
@@ -1,12 +1,10 @@
 /*
  *  linux/include/linux/mtd/nand.h
  *
- *  Copyright (c) 2000 David Woodhouse <dwmw2@mvhi.com>
+ *  Copyright (c) 2000 David Woodhouse <dwmw2@infradead.org>
  *                     Steven J. Hill <sjhill@realitydiluted.com>
  *		       Thomas Gleixner <tglx@linutronix.de>
  *
- * $Id: nand.h,v 1.74 2005/09/15 13:58:50 vwool Exp $
- *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 as
  * published by the Free Software Foundation.
@@ -190,6 +188,9 @@ typedef enum {
 #define NAND_MUST_PAD(chip) (!(chip->options & NAND_NO_PADDING))
 #define NAND_HAS_CACHEPROG(chip) ((chip->options & NAND_CACHEPRG))
 #define NAND_HAS_COPYBACK(chip) ((chip->options & NAND_COPYBACK))
+/* Large page NAND with SOFT_ECC should support subpage reads */
+#define NAND_SUBPAGE_READ(chip) ((chip->ecc.mode == NAND_ECC_SOFT) \
+					&& (chip->page_shift > 9))
 
 /* Mask to zero out the chip options, which come from the id table */
 #define NAND_CHIPOPTIONS_MSK	(0x0000ffff & ~NAND_NO_AUTOINCR)
@@ -278,6 +279,10 @@ struct nand_ecc_ctrl {
 	int			(*read_page)(struct mtd_info *mtd,
 					     struct nand_chip *chip,
 					     uint8_t *buf);
+	int			(*read_subpage)(struct mtd_info *mtd,
+					     struct nand_chip *chip,
+					     uint32_t offs, uint32_t len,
+					     uint8_t *buf);
 	void			(*write_page)(struct mtd_info *mtd,
 					      struct nand_chip *chip,
 					      const uint8_t *buf);
@@ -435,6 +440,7 @@ struct nand_chip {
 #define NAND_MFR_STMICRO	0x20
 #define NAND_MFR_HYNIX		0xad
 #define NAND_MFR_MICRON		0x2c
+#define NAND_MFR_AMD		0x01
 
 /**
  * struct nand_flash_dev - NAND Flash Device ID Structure
diff --git a/include/linux/mtd/nand_ecc.h b/include/linux/mtd/nand_ecc.h
index 12c5bc3..090da50 100644
--- a/include/linux/mtd/nand_ecc.h
+++ b/include/linux/mtd/nand_ecc.h
@@ -3,8 +3,6 @@
  *
  *  Copyright (C) 2000 Steven J. Hill (sjhill@realitydiluted.com)
  *
- * $Id: nand_ecc.h,v 1.4 2004/06/17 02:35:02 dbrown Exp $
- *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 as
  * published by the Free Software Foundation.
diff --git a/include/linux/mtd/nftl.h b/include/linux/mtd/nftl.h
index 6731a16..fe22e0d 100644
--- a/include/linux/mtd/nftl.h
+++ b/include/linux/mtd/nftl.h
@@ -1,6 +1,4 @@
 /*
- * $Id: nftl.h,v 1.16 2004/06/30 14:49:00 dbrown Exp $
- *
  * (C) 1999-2003 David Woodhouse <dwmw2@infradead.org>
  */
 
@@ -43,6 +41,11 @@ struct NFTLrecord {
 int NFTL_mount(struct NFTLrecord *s);
 int NFTL_formatblock(struct NFTLrecord *s, int block);
 
+int nftl_read_oob(struct mtd_info *mtd, loff_t offs, size_t len,
+		  size_t *retlen, uint8_t *buf);
+int nftl_write_oob(struct mtd_info *mtd, loff_t offs, size_t len,
+		   size_t *retlen, uint8_t *buf);
+
 #ifndef NFTL_MAJOR
 #define NFTL_MAJOR 93
 #endif
diff --git a/include/linux/mtd/onenand.h b/include/linux/mtd/onenand.h
index 420eb14..4467c2b 100644
--- a/include/linux/mtd/onenand.h
+++ b/include/linux/mtd/onenand.h
@@ -51,6 +51,7 @@ struct onenand_bufferram {
  * @param page_shift	[INTERN] number of address bits in a page
  * @param ppb_shift	[INTERN] number of address bits in a pages per block
  * @param page_mask	[INTERN] a page per block mask
+ * @param writesize	[INTERN] a real page size
  * @param bufferam_index	[INTERN] BufferRAM index
  * @param bufferam	[INTERN] BufferRAM info
  * @param readw		[REPLACEABLE] hardware specific function for read short
diff --git a/include/linux/mtd/onenand_regs.h b/include/linux/mtd/onenand_regs.h
index 6a8aa28..a245e14 100644
--- a/include/linux/mtd/onenand_regs.h
+++ b/include/linux/mtd/onenand_regs.h
@@ -67,12 +67,16 @@
 /*
  * Device ID Register F001h (R)
  */
+#define ONENAND_DEVICE_DENSITY_MASK	(0xf)
 #define ONENAND_DEVICE_DENSITY_SHIFT	(4)
 #define ONENAND_DEVICE_IS_DDP		(1 << 3)
 #define ONENAND_DEVICE_IS_DEMUX		(1 << 2)
 #define ONENAND_DEVICE_VCC_MASK		(0x3)
 
 #define ONENAND_DEVICE_DENSITY_512Mb	(0x002)
+#define ONENAND_DEVICE_DENSITY_1Gb	(0x003)
+#define ONENAND_DEVICE_DENSITY_2Gb	(0x004)
+#define ONENAND_DEVICE_DENSITY_4Gb	(0x005)
 
 /*
  * Version ID Register F002h (R)
@@ -110,6 +114,8 @@
 #define ONENAND_CMD_READOOB		(0x13)
 #define ONENAND_CMD_PROG		(0x80)
 #define ONENAND_CMD_PROGOOB		(0x1A)
+#define ONENAND_CMD_2X_PROG		(0x7D)
+#define ONENAND_CMD_2X_CACHE_PROG	(0x7F)
 #define ONENAND_CMD_UNLOCK		(0x23)
 #define ONENAND_CMD_LOCK		(0x2A)
 #define ONENAND_CMD_LOCK_TIGHT		(0x2C)