[PATCH 3/3] mtd: remove dead disk-on-chip support

[Sascha Hauer <s.hauer@pengutronix.de>]

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
 drivers/mtd/nand/Kconfig      |   32 -
 drivers/mtd/nand/Makefile     |    1 -
 drivers/mtd/nand/diskonchip.c | 1787 -----------------------------------------
 3 files changed, 1820 deletions(-)
 delete mode 100644 drivers/mtd/nand/diskonchip.c

diff --git a/drivers/mtd/nand/Kconfig b/drivers/mtd/nand/Kconfig
index 3f90643..6889b44 100644
--- a/drivers/mtd/nand/Kconfig
+++ b/drivers/mtd/nand/Kconfig
@@ -105,38 +105,6 @@ config MTD_NAND_MUSEUM_IDS
 config MTD_NAND_IDS
 	tristate
 
-config MTD_NAND_DISKONCHIP
-	tristate "DiskOnChip 2000, Millennium and Millennium Plus"
-	depends on EXPERIMENTAL && BROKEN
-	help
-	  This is a reimplementation of M-Systems DiskOnChip 2000,
-	  Millennium and Millennium Plus as a standard NAND device driver,
-	  as opposed to the earlier self-contained MTD device drivers.
-	  This should enable, among other things, proper JFFS2 operation on
-	  these devices.
-
-config MTD_NAND_DISKONCHIP_BBTWRITE
-	bool "Allow BBT writes on DiskOnChip Millennium and 2000TSOP"
-	depends on MTD_NAND_DISKONCHIP
-	help
-	  On DiskOnChip devices shipped with the INFTL filesystem (Millennium
-	  and 2000 TSOP/Alon), Linux reserves some space at the end of the
-	  device for the Bad Block Table (BBT).  If you have existing INFTL
-	  data on your device (created by non-Linux tools such as M-Systems'
-	  DOS drivers), your data might overlap the area Linux wants to use for
-	  the BBT.  If this is a concern for you, leave this option disabled and
-	  Linux will not write BBT data into this area.
-	  The downside of leaving this option disabled is that if bad blocks
-	  are detected by Linux, they will not be recorded in the BBT, which
-	  could cause future problems.
-	  Once you enable this option, new filesystems (INFTL or others, created
-	  in Linux or other operating systems) will not use the reserved area.
-	  The only reason not to enable this option is to prevent damage to
-	  preexisting filesystems.
-	  Even if you leave this disabled, you can enable BBT writes at module
-	  load time (assuming you build diskonchip as a module) with the module
-	  parameter "inftl_bbt_write=1".
-
 config MTD_NAND_NOMADIK
 	tristate "ST Nomadik 8815 NAND support"
 	depends on ARCH_NOMADIK
diff --git a/drivers/mtd/nand/Makefile b/drivers/mtd/nand/Makefile
index 4179618..9d46bc0 100644
--- a/drivers/mtd/nand/Makefile
+++ b/drivers/mtd/nand/Makefile
@@ -9,7 +9,6 @@ obj-$(CONFIG_MTD_NAND_IDS)		+= nand_ids.o
 obj-$(CONFIG_NAND)			+= nand_base.o nand-bb.o
 obj-$(CONFIG_NAND_BBT)			+= nand_bbt.o
 
-obj-$(CONFIG_MTD_NAND_DISKONCHIP)	+= diskonchip.o
 obj-$(CONFIG_MTD_NAND_NOMADIK)		+= nomadik_nand.o
 obj-$(CONFIG_NAND_IMX)			+= nand_imx.o
 obj-$(CONFIG_NAND_OMAP_GPMC)		+= nand_omap_gpmc.o nand_omap_bch_decoder.o
diff --git a/drivers/mtd/nand/diskonchip.c b/drivers/mtd/nand/diskonchip.c
deleted file mode 100644
index 6da68dc..0000000
--- a/drivers/mtd/nand/diskonchip.c
+++ /dev/null
@@ -1,1787 +0,0 @@
-/*
- * drivers/mtd/nand/diskonchip.c
- *
- * (C) 2003 Red Hat, Inc.
- * (C) 2004 Dan Brown <dan_brown@ieee.org>
- * (C) 2004 Kalev Lember <kalev@smartlink.ee>
- *
- * Author: David Woodhouse <dwmw2@infradead.org>
- * Additional Diskonchip 2000 and Millennium support by Dan Brown <dan_brown@ieee.org>
- * Diskonchip Millennium Plus support by Kalev Lember <kalev@smartlink.ee>
- *
- * Error correction code lifted from the old docecc code
- * Author: Fabrice Bellard (fabrice.bellard@netgem.com)
- * Copyright (C) 2000 Netgem S.A.
- * converted to the generic Reed-Solomon library by Thomas Gleixner <tglx@linutronix.de>
- *
- * Interface to generic NAND code for M-Systems DiskOnChip devices
- *
- * $Id: diskonchip.c,v 1.45 2005/01/05 18:05:14 dwmw2 Exp $
- */
-
-#include <common.h>
-
-#if !defined(CFG_NAND_LEGACY)
-
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/sched.h>
-#include <linux/delay.h>
-#include <linux/rslib.h>
-#include <linux/moduleparam.h>
-#include <io.h>
-
-#include <linux/mtd/mtd.h>
-#include <linux/mtd/nand.h>
-#include <linux/mtd/doc2000.h>
-#include <linux/mtd/compatmac.h>
-#include <linux/mtd/partitions.h>
-#include <linux/mtd/inftl.h>
-
-/* Where to look for the devices? */
-#ifndef CONFIG_MTD_DISKONCHIP_PROBE_ADDRESS
-#define CONFIG_MTD_DISKONCHIP_PROBE_ADDRESS 0
-#endif
-
-static unsigned long __initdata doc_locations[] = {
-#if defined (__alpha__) || defined(__i386__) || defined(__x86_64__)
-#ifdef CONFIG_MTD_DISKONCHIP_PROBE_HIGH
-	0xfffc8000, 0xfffca000, 0xfffcc000, 0xfffce000,
-	0xfffd0000, 0xfffd2000, 0xfffd4000, 0xfffd6000,
-	0xfffd8000, 0xfffda000, 0xfffdc000, 0xfffde000,
-	0xfffe0000, 0xfffe2000, 0xfffe4000, 0xfffe6000,
-	0xfffe8000, 0xfffea000, 0xfffec000, 0xfffee000,
-#else /*  CONFIG_MTD_DOCPROBE_HIGH */
-	0xc8000, 0xca000, 0xcc000, 0xce000,
-	0xd0000, 0xd2000, 0xd4000, 0xd6000,
-	0xd8000, 0xda000, 0xdc000, 0xde000,
-	0xe0000, 0xe2000, 0xe4000, 0xe6000,
-	0xe8000, 0xea000, 0xec000, 0xee000,
-#endif /*  CONFIG_MTD_DOCPROBE_HIGH */
-#elif defined(__PPC__)
-	0xe4000000,
-#elif defined(CONFIG_MOMENCO_OCELOT)
-	0x2f000000,
-	0xff000000,
-#elif defined(CONFIG_MOMENCO_OCELOT_G) || defined (CONFIG_MOMENCO_OCELOT_C)
-	0xff000000,
-##else
-#warning Unknown architecture for DiskOnChip. No default probe locations defined
-#endif
-	0xffffffff };
-
-static struct mtd_info *doclist = NULL;
-
-struct doc_priv {
-	void __iomem *virtadr;
-	unsigned long physadr;
-	u_char ChipID;
-	u_char CDSNControl;
-	int chips_per_floor; /* The number of chips detected on each floor */
-	int curfloor;
-	int curchip;
-	int mh0_page;
-	int mh1_page;
-	struct mtd_info *nextdoc;
-};
-
-/* Max number of eraseblocks to scan (from start of device) for the (I)NFTL
-   MediaHeader.  The spec says to just keep going, I think, but that's just
-   silly. */
-#define MAX_MEDIAHEADER_SCAN 8
-
-/* This is the syndrome computed by the HW ecc generator upon reading an empty
-   page, one with all 0xff for data and stored ecc code. */
-static u_char empty_read_syndrome[6] = { 0x26, 0xff, 0x6d, 0x47, 0x73, 0x7a };
-/* This is the ecc value computed by the HW ecc generator upon writing an empty
-   page, one with all 0xff for data. */
-static u_char empty_write_ecc[6] = { 0x4b, 0x00, 0xe2, 0x0e, 0x93, 0xf7 };
-
-#define INFTL_BBT_RESERVED_BLOCKS 4
-
-#define DoC_is_MillenniumPlus(doc) ((doc)->ChipID == DOC_ChipID_DocMilPlus16 || (doc)->ChipID == DOC_ChipID_DocMilPlus32)
-#define DoC_is_Millennium(doc) ((doc)->ChipID == DOC_ChipID_DocMil)
-#define DoC_is_2000(doc) ((doc)->ChipID == DOC_ChipID_Doc2k)
-
-static void doc200x_hwcontrol(struct mtd_info *mtd, int cmd);
-static void doc200x_select_chip(struct mtd_info *mtd, int chip);
-
-static int debug=0;
-module_param(debug, int, 0);
-
-static int try_dword=1;
-module_param(try_dword, int, 0);
-
-static int no_ecc_failures=0;
-module_param(no_ecc_failures, int, 0);
-
-#ifdef CONFIG_MTD_PARTITIONS
-static int no_autopart=0;
-module_param(no_autopart, int, 0);
-#endif
-
-#ifdef CONFIG_MTD_NAND_DISKONCHIP_BBTWRITE
-static int inftl_bbt_write=1;
-#else
-static int inftl_bbt_write=0;
-#endif
-module_param(inftl_bbt_write, int, 0);
-
-static unsigned long doc_config_location = CONFIG_MTD_DISKONCHIP_PROBE_ADDRESS;
-module_param(doc_config_location, ulong, 0);
-MODULE_PARM_DESC(doc_config_location, "Physical memory address at which to probe for DiskOnChip");
-
-
-/* Sector size for HW ECC */
-#define SECTOR_SIZE 512
-/* The sector bytes are packed into NB_DATA 10 bit words */
-#define NB_DATA (((SECTOR_SIZE + 1) * 8 + 6) / 10)
-/* Number of roots */
-#define NROOTS 4
-/* First consective root */
-#define FCR 510
-/* Number of symbols */
-#define NN 1023
-
-/* the Reed Solomon control structure */
-static struct rs_control *rs_decoder;
-
-/*
- * The HW decoder in the DoC ASIC's provides us a error syndrome,
- * which we must convert to a standard syndrom usable by the generic
- * Reed-Solomon library code.
- *
- * Fabrice Bellard figured this out in the old docecc code. I added
- * some comments, improved a minor bit and converted it to make use
- * of the generic Reed-Solomon libary. tglx
- */
-static int doc_ecc_decode (struct rs_control *rs, uint8_t *data, uint8_t *ecc)
-{
-	int i, j, nerr, errpos[8];
-	uint8_t parity;
-	uint16_t ds[4], s[5], tmp, errval[8], syn[4];
-
-	/* Convert the ecc bytes into words */
-	ds[0] = ((ecc[4] & 0xff) >> 0) | ((ecc[5] & 0x03) << 8);
-	ds[1] = ((ecc[5] & 0xfc) >> 2) | ((ecc[2] & 0x0f) << 6);
-	ds[2] = ((ecc[2] & 0xf0) >> 4) | ((ecc[3] & 0x3f) << 4);
-	ds[3] = ((ecc[3] & 0xc0) >> 6) | ((ecc[0] & 0xff) << 2);
-	parity = ecc[1];
-
-	/* Initialize the syndrom buffer */
-	for (i = 0; i < NROOTS; i++)
-		s[i] = ds[0];
-	/*
-	 *  Evaluate
-	 *  s[i] = ds[3]x^3 + ds[2]x^2 + ds[1]x^1 + ds[0]
-	 *  where x = alpha^(FCR + i)
-	 */
-	for(j = 1; j < NROOTS; j++) {
-		if(ds[j] == 0)
-			continue;
-		tmp = rs->index_of[ds[j]];
-		for(i = 0; i < NROOTS; i++)
-			s[i] ^= rs->alpha_to[rs_modnn(rs, tmp + (FCR + i) * j)];
-	}
-
-	/* Calc s[i] = s[i] / alpha^(v + i) */
-	for (i = 0; i < NROOTS; i++) {
-		if (syn[i])
- 			syn[i] = rs_modnn(rs, rs->index_of[s[i]] + (NN - FCR - i));
-	}
-	/* Call the decoder library */
-	nerr = decode_rs16(rs, NULL, NULL, 1019, syn, 0, errpos, 0, errval);
-
-	/* Incorrectable errors ? */
-	if (nerr < 0)
-		return nerr;
-
-	/*
-	 * Correct the errors. The bitpositions are a bit of magic,
-	 * but they are given by the design of the de/encoder circuit
-	 * in the DoC ASIC's.
-	 */
-	for(i = 0;i < nerr; i++) {
-		int index, bitpos, pos = 1015 - errpos[i];
-		uint8_t val;
-		if (pos >= NB_DATA && pos < 1019)
-			continue;
-		if (pos < NB_DATA) {
-			/* extract bit position (MSB first) */
-			pos = 10 * (NB_DATA - 1 - pos) - 6;
-			/* now correct the following 10 bits. At most two bytes
-			   can be modified since pos is even */
-			index = (pos >> 3) ^ 1;
-			bitpos = pos & 7;
-			if ((index >= 0 && index < SECTOR_SIZE) ||
-			    index == (SECTOR_SIZE + 1)) {
-				val = (uint8_t) (errval[i] >> (2 + bitpos));
-				parity ^= val;
-				if (index < SECTOR_SIZE)
-					data[index] ^= val;
-			}
-			index = ((pos >> 3) + 1) ^ 1;
-			bitpos = (bitpos + 10) & 7;
-			if (bitpos == 0)
-				bitpos = 8;
-			if ((index >= 0 && index < SECTOR_SIZE) ||
-			    index == (SECTOR_SIZE + 1)) {
-				val = (uint8_t)(errval[i] << (8 - bitpos));
-				parity ^= val;
-				if (index < SECTOR_SIZE)
-					data[index] ^= val;
-			}
-		}
-	}
-	/* If the parity is wrong, no rescue possible */
-	return parity ? -1 : nerr;
-}
-
-static void DoC_Delay(struct doc_priv *doc, unsigned short cycles)
-{
-	volatile char dummy;
-	int i;
-
-	for (i = 0; i < cycles; i++) {
-		if (DoC_is_Millennium(doc))
-			dummy = ReadDOC(doc->virtadr, NOP);
-		else if (DoC_is_MillenniumPlus(doc))
-			dummy = ReadDOC(doc->virtadr, Mplus_NOP);
-		else
-			dummy = ReadDOC(doc->virtadr, DOCStatus);
-	}
-
-}
-
-#define CDSN_CTRL_FR_B_MASK	(CDSN_CTRL_FR_B0 | CDSN_CTRL_FR_B1)
-
-/* DOC_WaitReady: Wait for RDY line to be asserted by the flash chip */
-static int _DoC_WaitReady(struct doc_priv *doc)
-{
-	void __iomem *docptr = doc->virtadr;
-	unsigned long timeo = jiffies + (HZ * 10);
-
-	if(debug) printk("_DoC_WaitReady...\n");
-	/* Out-of-line routine to wait for chip response */
-	if (DoC_is_MillenniumPlus(doc)) {
-		while ((ReadDOC(docptr, Mplus_FlashControl) & CDSN_CTRL_FR_B_MASK) != CDSN_CTRL_FR_B_MASK) {
-			if (time_after(jiffies, timeo)) {
-				printk("_DoC_WaitReady timed out.\n");
-				return -EIO;
-			}
-			udelay(1);
-			cond_resched();
-		}
-	} else {
-		while (!(ReadDOC(docptr, CDSNControl) & CDSN_CTRL_FR_B)) {
-			if (time_after(jiffies, timeo)) {
-				printk("_DoC_WaitReady timed out.\n");
-				return -EIO;
-			}
-			udelay(1);
-			cond_resched();
-		}
-	}
-
-	return 0;
-}
-
-static inline int DoC_WaitReady(struct doc_priv *doc)
-{
-	void __iomem *docptr = doc->virtadr;
-	int ret = 0;
-
-	if (DoC_is_MillenniumPlus(doc)) {
-		DoC_Delay(doc, 4);
-
-		if ((ReadDOC(docptr, Mplus_FlashControl) & CDSN_CTRL_FR_B_MASK) != CDSN_CTRL_FR_B_MASK)
-			/* Call the out-of-line routine to wait */
-			ret = _DoC_WaitReady(doc);
-	} else {
-		DoC_Delay(doc, 4);
-
-		if (!(ReadDOC(docptr, CDSNControl) & CDSN_CTRL_FR_B))
-			/* Call the out-of-line routine to wait */
-			ret = _DoC_WaitReady(doc);
-		DoC_Delay(doc, 2);
-	}
-
-	if(debug) printk("DoC_WaitReady OK\n");
-	return ret;
-}
-
-static void doc2000_write_byte(struct mtd_info *mtd, u_char datum)
-{
-	struct nand_chip *this = mtd->priv;
-	struct doc_priv *doc = this->priv;
-	void __iomem *docptr = doc->virtadr;
-
-	if(debug)printk("write_byte %02x\n", datum);
-	WriteDOC(datum, docptr, CDSNSlowIO);
-	WriteDOC(datum, docptr, 2k_CDSN_IO);
-}
-
-static u_char doc2000_read_byte(struct mtd_info *mtd)
-{
-	struct nand_chip *this = mtd->priv;
-	struct doc_priv *doc = this->priv;
-	void __iomem *docptr = doc->virtadr;
-	u_char ret;
-
-	ReadDOC(docptr, CDSNSlowIO);
-	DoC_Delay(doc, 2);
-	ret = ReadDOC(docptr, 2k_CDSN_IO);
-	if (debug) printk("read_byte returns %02x\n", ret);
-	return ret;
-}
-
-static void doc2000_writebuf(struct mtd_info *mtd,
-			     const u_char *buf, int len)
-{
-	struct nand_chip *this = mtd->priv;
-	struct doc_priv *doc = this->priv;
-	void __iomem *docptr = doc->virtadr;
-	int i;
-	if (debug)printk("writebuf of %d bytes: ", len);
-	for (i=0; i < len; i++) {
-		WriteDOC_(buf[i], docptr, DoC_2k_CDSN_IO + i);
-		if (debug && i < 16)
-			printk("%02x ", buf[i]);
-	}
-	if (debug) printk("\n");
-}
-
-static void doc2000_readbuf(struct mtd_info *mtd,
-			    u_char *buf, int len)
-{
-	struct nand_chip *this = mtd->priv;
-	struct doc_priv *doc = this->priv;
-	void __iomem *docptr = doc->virtadr;
- 	int i;
-
-	if (debug)printk("readbuf of %d bytes: ", len);
-
-	for (i=0; i < len; i++) {
-		buf[i] = ReadDOC(docptr, 2k_CDSN_IO + i);
-	}
-}
-
-static void doc2000_readbuf_dword(struct mtd_info *mtd,
-			    u_char *buf, int len)
-{
-	struct nand_chip *this = mtd->priv;
-	struct doc_priv *doc = this->priv;
-	void __iomem *docptr = doc->virtadr;
- 	int i;
-
-	if (debug) printk("readbuf_dword of %d bytes: ", len);
-
-	if (unlikely((((unsigned long)buf)|len) & 3)) {
-		for (i=0; i < len; i++) {
-			*(uint8_t *)(&buf[i]) = ReadDOC(docptr, 2k_CDSN_IO + i);
-		}
-	} else {
-		for (i=0; i < len; i+=4) {
-			*(uint32_t*)(&buf[i]) = readl(docptr + DoC_2k_CDSN_IO + i);
-		}
-	}
-}
-
-static int doc2000_verifybuf(struct mtd_info *mtd,
-			      const u_char *buf, int len)
-{
-	struct nand_chip *this = mtd->priv;
-	struct doc_priv *doc = this->priv;
-	void __iomem *docptr = doc->virtadr;
-	int i;
-
-	for (i=0; i < len; i++)
-		if (buf[i] != ReadDOC(docptr, 2k_CDSN_IO))
-			return -EFAULT;
-	return 0;
-}
-
-static uint16_t __init doc200x_ident_chip(struct mtd_info *mtd, int nr)
-{
-	struct nand_chip *this = mtd->priv;
-	struct doc_priv *doc = this->priv;
-	uint16_t ret;
-
-	doc200x_select_chip(mtd, nr);
-	doc200x_hwcontrol(mtd, NAND_CTL_SETCLE);
-	this->write_byte(mtd, NAND_CMD_READID);
-	doc200x_hwcontrol(mtd, NAND_CTL_CLRCLE);
-	doc200x_hwcontrol(mtd, NAND_CTL_SETALE);
-	this->write_byte(mtd, 0);
-	doc200x_hwcontrol(mtd, NAND_CTL_CLRALE);
-
-	ret = this->read_byte(mtd) << 8;
-	ret |= this->read_byte(mtd);
-
-	if (doc->ChipID == DOC_ChipID_Doc2k && try_dword && !nr) {
-		/* First chip probe. See if we get same results by 32-bit access */
-		union {
-			uint32_t dword;
-			uint8_t byte[4];
-		} ident;
-		void __iomem *docptr = doc->virtadr;
-
-		doc200x_hwcontrol(mtd, NAND_CTL_SETCLE);
-		doc2000_write_byte(mtd, NAND_CMD_READID);
-		doc200x_hwcontrol(mtd, NAND_CTL_CLRCLE);
-		doc200x_hwcontrol(mtd, NAND_CTL_SETALE);
-		doc2000_write_byte(mtd, 0);
-		doc200x_hwcontrol(mtd, NAND_CTL_CLRALE);
-
-		ident.dword = readl(docptr + DoC_2k_CDSN_IO);
-		if (((ident.byte[0] << 8) | ident.byte[1]) == ret) {
-			printk(KERN_INFO "DiskOnChip 2000 responds to DWORD access\n");
-			this->read_buf = &doc2000_readbuf_dword;
-		}
-	}
-
-	return ret;
-}
-
-static void __init doc2000_count_chips(struct mtd_info *mtd)
-{
-	struct nand_chip *this = mtd->priv;
-	struct doc_priv *doc = this->priv;
-	uint16_t mfrid;
-	int i;
-
-	/* Max 4 chips per floor on DiskOnChip 2000 */
-	doc->chips_per_floor = 4;
-
-	/* Find out what the first chip is */
-	mfrid = doc200x_ident_chip(mtd, 0);
-
-	/* Find how many chips in each floor. */
-	for (i = 1; i < 4; i++) {
-		if (doc200x_ident_chip(mtd, i) != mfrid)
-			break;
-	}
-	doc->chips_per_floor = i;
-	printk(KERN_DEBUG "Detected %d chips per floor.\n", i);
-}
-
-static int doc200x_wait(struct mtd_info *mtd, struct nand_chip *this, int state)
-{
-	struct doc_priv *doc = this->priv;
-
-	int status;
-
-	DoC_WaitReady(doc);
-	this->cmdfunc(mtd, NAND_CMD_STATUS, -1, -1);
-	DoC_WaitReady(doc);
-	status = (int)this->read_byte(mtd);
-
-	return status;
-}
-
-static void doc2001_write_byte(struct mtd_info *mtd, u_char datum)
-{
-	struct nand_chip *this = mtd->priv;
-	struct doc_priv *doc = this->priv;
-	void __iomem *docptr = doc->virtadr;
-
-	WriteDOC(datum, docptr, CDSNSlowIO);
-	WriteDOC(datum, docptr, Mil_CDSN_IO);
-	WriteDOC(datum, docptr, WritePipeTerm);
-}
-
-static u_char doc2001_read_byte(struct mtd_info *mtd)
-{
-	struct nand_chip *this = mtd->priv;
-	struct doc_priv *doc = this->priv;
-	void __iomem *docptr = doc->virtadr;
-
-	/*ReadDOC(docptr, CDSNSlowIO); */
-	/* 11.4.5 -- delay twice to allow extended length cycle */
-	DoC_Delay(doc, 2);
-	ReadDOC(docptr, ReadPipeInit);
-	/*return ReadDOC(docptr, Mil_CDSN_IO); */
-	return ReadDOC(docptr, LastDataRead);
-}
-
-static void doc2001_writebuf(struct mtd_info *mtd,
-			     const u_char *buf, int len)
-{
-	struct nand_chip *this = mtd->priv;
-	struct doc_priv *doc = this->priv;
-	void __iomem *docptr = doc->virtadr;
-	int i;
-
-	for (i=0; i < len; i++)
-		WriteDOC_(buf[i], docptr, DoC_Mil_CDSN_IO + i);
-	/* Terminate write pipeline */
-	WriteDOC(0x00, docptr, WritePipeTerm);
-}
-
-static void doc2001_readbuf(struct mtd_info *mtd,
-			    u_char *buf, int len)
-{
-	struct nand_chip *this = mtd->priv;
-	struct doc_priv *doc = this->priv;
-	void __iomem *docptr = doc->virtadr;
-	int i;
-
-	/* Start read pipeline */
-	ReadDOC(docptr, ReadPipeInit);
-
-	for (i=0; i < len-1; i++)
-		buf[i] = ReadDOC(docptr, Mil_CDSN_IO + (i & 0xff));
-
-	/* Terminate read pipeline */
-	buf[i] = ReadDOC(docptr, LastDataRead);
-}
-
-static int doc2001_verifybuf(struct mtd_info *mtd,
-			     const u_char *buf, int len)
-{
-	struct nand_chip *this = mtd->priv;
-	struct doc_priv *doc = this->priv;
-	void __iomem *docptr = doc->virtadr;
-	int i;
-
-	/* Start read pipeline */
-	ReadDOC(docptr, ReadPipeInit);
-
-	for (i=0; i < len-1; i++)
-		if (buf[i] != ReadDOC(docptr, Mil_CDSN_IO)) {
-			ReadDOC(docptr, LastDataRead);
-			return i;
-		}
-	if (buf[i] != ReadDOC(docptr, LastDataRead))
-		return i;
-	return 0;
-}
-
-static u_char doc2001plus_read_byte(struct mtd_info *mtd)
-{
-	struct nand_chip *this = mtd->priv;
-	struct doc_priv *doc = this->priv;
-	void __iomem *docptr = doc->virtadr;
-	u_char ret;
-
-	ReadDOC(docptr, Mplus_ReadPipeInit);
-	ReadDOC(docptr, Mplus_ReadPipeInit);
-	ret = ReadDOC(docptr, Mplus_LastDataRead);
-	if (debug) printk("read_byte returns %02x\n", ret);
-	return ret;
-}
-
-static void doc2001plus_writebuf(struct mtd_info *mtd,
-			     const u_char *buf, int len)
-{
-	struct nand_chip *this = mtd->priv;
-	struct doc_priv *doc = this->priv;
-	void __iomem *docptr = doc->virtadr;
-	int i;
-
-	if (debug)printk("writebuf of %d bytes: ", len);
-	for (i=0; i < len; i++) {
-		WriteDOC_(buf[i], docptr, DoC_Mil_CDSN_IO + i);
-		if (debug && i < 16)
-			printk("%02x ", buf[i]);
-	}
-	if (debug) printk("\n");
-}
-
-static void doc2001plus_readbuf(struct mtd_info *mtd,
-			    u_char *buf, int len)
-{
-	struct nand_chip *this = mtd->priv;
-	struct doc_priv *doc = this->priv;
-	void __iomem *docptr = doc->virtadr;
-	int i;
-
-	if (debug)printk("readbuf of %d bytes: ", len);
-
-	/* Start read pipeline */
-	ReadDOC(docptr, Mplus_ReadPipeInit);
-	ReadDOC(docptr, Mplus_ReadPipeInit);
-
-	for (i=0; i < len-2; i++) {
-		buf[i] = ReadDOC(docptr, Mil_CDSN_IO);
-		if (debug && i < 16)
-			printk("%02x ", buf[i]);
-	}
-
-	/* Terminate read pipeline */
-	buf[len-2] = ReadDOC(docptr, Mplus_LastDataRead);
-	if (debug && i < 16)
-		printk("%02x ", buf[len-2]);
-	buf[len-1] = ReadDOC(docptr, Mplus_LastDataRead);
-	if (debug && i < 16)
-		printk("%02x ", buf[len-1]);
-	if (debug) printk("\n");
-}
-
-static int doc2001plus_verifybuf(struct mtd_info *mtd,
-			     const u_char *buf, int len)
-{
-	struct nand_chip *this = mtd->priv;
-	struct doc_priv *doc = this->priv;
-	void __iomem *docptr = doc->virtadr;
-	int i;
-
-	if (debug)printk("verifybuf of %d bytes: ", len);
-
-	/* Start read pipeline */
-	ReadDOC(docptr, Mplus_ReadPipeInit);
-	ReadDOC(docptr, Mplus_ReadPipeInit);
-
-	for (i=0; i < len-2; i++)
-		if (buf[i] != ReadDOC(docptr, Mil_CDSN_IO)) {
-			ReadDOC(docptr, Mplus_LastDataRead);
-			ReadDOC(docptr, Mplus_LastDataRead);
-			return i;
-		}
-	if (buf[len-2] != ReadDOC(docptr, Mplus_LastDataRead))
-		return len-2;
-	if (buf[len-1] != ReadDOC(docptr, Mplus_LastDataRead))
-		return len-1;
-	return 0;
-}
-
-static void doc2001plus_select_chip(struct mtd_info *mtd, int chip)
-{
-	struct nand_chip *this = mtd->priv;
-	struct doc_priv *doc = this->priv;
-	void __iomem *docptr = doc->virtadr;
-	int floor = 0;
-
-	if(debug)printk("select chip (%d)\n", chip);
-
-	if (chip == -1) {
-		/* Disable flash internally */
-		WriteDOC(0, docptr, Mplus_FlashSelect);
-		return;
-	}
-
-	floor = chip / doc->chips_per_floor;
-	chip -= (floor *  doc->chips_per_floor);
-
-	/* Assert ChipEnable and deassert WriteProtect */
-	WriteDOC((DOC_FLASH_CE), docptr, Mplus_FlashSelect);
-	this->cmdfunc(mtd, NAND_CMD_RESET, -1, -1);
-
-	doc->curchip = chip;
-	doc->curfloor = floor;
-}
-
-static void doc200x_select_chip(struct mtd_info *mtd, int chip)
-{
-	struct nand_chip *this = mtd->priv;
-	struct doc_priv *doc = this->priv;
-	void __iomem *docptr = doc->virtadr;
-	int floor = 0;
-
-	if(debug)printk("select chip (%d)\n", chip);
-
-	if (chip == -1)
-		return;
-
-	floor = chip / doc->chips_per_floor;
-	chip -= (floor *  doc->chips_per_floor);
-
-	/* 11.4.4 -- deassert CE before changing chip */
-	doc200x_hwcontrol(mtd, NAND_CTL_CLRNCE);
-
-	WriteDOC(floor, docptr, FloorSelect);
-	WriteDOC(chip, docptr, CDSNDeviceSelect);
-
-	doc200x_hwcontrol(mtd, NAND_CTL_SETNCE);
-
-	doc->curchip = chip;
-	doc->curfloor = floor;
-}
-
-static void doc200x_hwcontrol(struct mtd_info *mtd, int cmd)
-{
-	struct nand_chip *this = mtd->priv;
-	struct doc_priv *doc = this->priv;
-	void __iomem *docptr = doc->virtadr;
-
-	switch(cmd) {
-	case NAND_CTL_SETNCE:
-		doc->CDSNControl |= CDSN_CTRL_CE;
-		break;
-	case NAND_CTL_CLRNCE:
-		doc->CDSNControl &= ~CDSN_CTRL_CE;
-		break;
-	case NAND_CTL_SETCLE:
-		doc->CDSNControl |= CDSN_CTRL_CLE;
-		break;
-	case NAND_CTL_CLRCLE:
-		doc->CDSNControl &= ~CDSN_CTRL_CLE;
-		break;
-	case NAND_CTL_SETALE:
-		doc->CDSNControl |= CDSN_CTRL_ALE;
-		break;
-	case NAND_CTL_CLRALE:
-		doc->CDSNControl &= ~CDSN_CTRL_ALE;
-		break;
-	case NAND_CTL_SETWP:
-		doc->CDSNControl |= CDSN_CTRL_WP;
-		break;
-	case NAND_CTL_CLRWP:
-		doc->CDSNControl &= ~CDSN_CTRL_WP;
-		break;
-	}
-	if (debug)printk("hwcontrol(%d): %02x\n", cmd, doc->CDSNControl);
-	WriteDOC(doc->CDSNControl, docptr, CDSNControl);
-	/* 11.4.3 -- 4 NOPs after CSDNControl write */
-	DoC_Delay(doc, 4);
-}
-
-static void doc2001plus_command (struct mtd_info *mtd, unsigned command, int column, int page_addr)
-{
-	struct nand_chip *this = mtd->priv;
-	struct doc_priv *doc = this->priv;
-	void __iomem *docptr = doc->virtadr;
-
-	/*
-	 * Must terminate write pipeline before sending any commands
-	 * to the device.
-	 */
-	if (command == NAND_CMD_PAGEPROG) {
-		WriteDOC(0x00, docptr, Mplus_WritePipeTerm);
-		WriteDOC(0x00, docptr, Mplus_WritePipeTerm);
-	}
-
-	/*
-	 * Write out the command to the device.
-	 */
-	if (command == NAND_CMD_SEQIN) {
-		int readcmd;
-
-		if (column >= mtd->oobblock) {
-			/* OOB area */
-			column -= mtd->oobblock;
-			readcmd = NAND_CMD_READOOB;
-		} else if (column < 256) {
-			/* First 256 bytes --> READ0 */
-			readcmd = NAND_CMD_READ0;
-		} else {
-			column -= 256;
-			readcmd = NAND_CMD_READ1;
-		}
-		WriteDOC(readcmd, docptr, Mplus_FlashCmd);
-	}
-	WriteDOC(command, docptr, Mplus_FlashCmd);
-	WriteDOC(0, docptr, Mplus_WritePipeTerm);
-	WriteDOC(0, docptr, Mplus_WritePipeTerm);
-
-	if (column != -1 || page_addr != -1) {
-		/* Serially input address */
-		if (column != -1) {
-			/* Adjust columns for 16 bit buswidth */
-			if (this->options & NAND_BUSWIDTH_16)
-				column >>= 1;
-			WriteDOC(column, docptr, Mplus_FlashAddress);
-		}
-		if (page_addr != -1) {
-			WriteDOC((unsigned char) (page_addr & 0xff), docptr, Mplus_FlashAddress);
-			WriteDOC((unsigned char) ((page_addr >> 8) & 0xff), docptr, Mplus_FlashAddress);
-			/* One more address cycle for higher density devices */
-			if (this->chipsize & 0x0c000000) {
-				WriteDOC((unsigned char) ((page_addr >> 16) & 0x0f), docptr, Mplus_FlashAddress);
-				printk("high density\n");
-			}
-		}
-		WriteDOC(0, docptr, Mplus_WritePipeTerm);
-		WriteDOC(0, docptr, Mplus_WritePipeTerm);
-		/* deassert ALE */
-		if (command == NAND_CMD_READ0 || command == NAND_CMD_READ1 || command == NAND_CMD_READOOB || command == NAND_CMD_READID)
-			WriteDOC(0, docptr, Mplus_FlashControl);
-	}
-
-	/*
-	 * program and erase have their own busy handlers
-	 * status and sequential in needs no delay
-	*/
-	switch (command) {
-
-	case NAND_CMD_PAGEPROG:
-	case NAND_CMD_ERASE1:
-	case NAND_CMD_ERASE2:
-	case NAND_CMD_SEQIN:
-	case NAND_CMD_STATUS:
-		return;
-
-	case NAND_CMD_RESET:
-		if (this->dev_ready)
-			break;
-		udelay(this->chip_delay);
-		WriteDOC(NAND_CMD_STATUS, docptr, Mplus_FlashCmd);
-		WriteDOC(0, docptr, Mplus_WritePipeTerm);
-		WriteDOC(0, docptr, Mplus_WritePipeTerm);
-		while ( !(this->read_byte(mtd) & 0x40));
-		return;
-
-	/* This applies to read commands */
-	default:
-		/*
-		 * If we don't have access to the busy pin, we apply the given
-		 * command delay
-		*/
-		if (!this->dev_ready) {
-			udelay (this->chip_delay);
-			return;
-		}
-	}
-
-	/* Apply this short delay always to ensure that we do wait tWB in
-	 * any case on any machine. */
-	ndelay (100);
-	/* wait until command is processed */
-	while (!this->dev_ready(mtd));
-}
-
-static int doc200x_dev_ready(struct mtd_info *mtd)
-{
-	struct nand_chip *this = mtd->priv;
-	struct doc_priv *doc = this->priv;
-	void __iomem *docptr = doc->virtadr;
-
-	if (DoC_is_MillenniumPlus(doc)) {
-		/* 11.4.2 -- must NOP four times before checking FR/B# */
-		DoC_Delay(doc, 4);
-		if ((ReadDOC(docptr, Mplus_FlashControl) & CDSN_CTRL_FR_B_MASK) != CDSN_CTRL_FR_B_MASK) {
-			if(debug)
-				printk("not ready\n");
-			return 0;
-		}
-		if (debug)printk("was ready\n");
-		return 1;
-	} else {
-		/* 11.4.2 -- must NOP four times before checking FR/B# */
-		DoC_Delay(doc, 4);
-		if (!(ReadDOC(docptr, CDSNControl) & CDSN_CTRL_FR_B)) {
-			if(debug)
-				printk("not ready\n");
-			return 0;
-		}
-		/* 11.4.2 -- Must NOP twice if it's ready */
-		DoC_Delay(doc, 2);
-		if (debug)printk("was ready\n");
-		return 1;
-	}
-}
-
-static int doc200x_block_bad(struct mtd_info *mtd, loff_t ofs, int getchip)
-{
-	/* This is our last resort if we couldn't find or create a BBT.  Just
-	   pretend all blocks are good. */
-	return 0;
-}
-
-static void doc200x_enable_hwecc(struct mtd_info *mtd, int mode)
-{
-	struct nand_chip *this = mtd->priv;
-	struct doc_priv *doc = this->priv;
-	void __iomem *docptr = doc->virtadr;
-
-	/* Prime the ECC engine */
-	switch(mode) {
-	case NAND_ECC_READ:
-		WriteDOC(DOC_ECC_RESET, docptr, ECCConf);
-		WriteDOC(DOC_ECC_EN, docptr, ECCConf);
-		break;
-	case NAND_ECC_WRITE:
-		WriteDOC(DOC_ECC_RESET, docptr, ECCConf);
-		WriteDOC(DOC_ECC_EN | DOC_ECC_RW, docptr, ECCConf);
-		break;
-	}
-}
-
-static void doc2001plus_enable_hwecc(struct mtd_info *mtd, int mode)
-{
-	struct nand_chip *this = mtd->priv;
-	struct doc_priv *doc = this->priv;
-	void __iomem *docptr = doc->virtadr;
-
-	/* Prime the ECC engine */
-	switch(mode) {
-	case NAND_ECC_READ:
-		WriteDOC(DOC_ECC_RESET, docptr, Mplus_ECCConf);
-		WriteDOC(DOC_ECC_EN, docptr, Mplus_ECCConf);
-		break;
-	case NAND_ECC_WRITE:
-		WriteDOC(DOC_ECC_RESET, docptr, Mplus_ECCConf);
-		WriteDOC(DOC_ECC_EN | DOC_ECC_RW, docptr, Mplus_ECCConf);
-		break;
-	}
-}
-
-/* This code is only called on write */
-static int doc200x_calculate_ecc(struct mtd_info *mtd, const u_char *dat,
-				 unsigned char *ecc_code)
-{
-	struct nand_chip *this = mtd->priv;
-	struct doc_priv *doc = this->priv;
-	void __iomem *docptr = doc->virtadr;
-	int i;
-	int emptymatch = 1;
-
-	/* flush the pipeline */
-	if (DoC_is_2000(doc)) {
-		WriteDOC(doc->CDSNControl & ~CDSN_CTRL_FLASH_IO, docptr, CDSNControl);
-		WriteDOC(0, docptr, 2k_CDSN_IO);
-		WriteDOC(0, docptr, 2k_CDSN_IO);
-		WriteDOC(0, docptr, 2k_CDSN_IO);
-		WriteDOC(doc->CDSNControl, docptr, CDSNControl);
-	} else if (DoC_is_MillenniumPlus(doc)) {
-		WriteDOC(0, docptr, Mplus_NOP);
-		WriteDOC(0, docptr, Mplus_NOP);
-		WriteDOC(0, docptr, Mplus_NOP);
-	} else {
-		WriteDOC(0, docptr, NOP);
-		WriteDOC(0, docptr, NOP);
-		WriteDOC(0, docptr, NOP);
-	}
-
-	for (i = 0; i < 6; i++) {
-		if (DoC_is_MillenniumPlus(doc))
-			ecc_code[i] = ReadDOC_(docptr, DoC_Mplus_ECCSyndrome0 + i);
-		else
-			ecc_code[i] = ReadDOC_(docptr, DoC_ECCSyndrome0 + i);
-		if (ecc_code[i] != empty_write_ecc[i])
-			emptymatch = 0;
-	}
-	if (DoC_is_MillenniumPlus(doc))
-		WriteDOC(DOC_ECC_DIS, docptr, Mplus_ECCConf);
-	else
-		WriteDOC(DOC_ECC_DIS, docptr, ECCConf);
-#if 0
-	/* If emptymatch=1, we might have an all-0xff data buffer.  Check. */
-	if (emptymatch) {
-		/* Note: this somewhat expensive test should not be triggered
-		   often.  It could be optimized away by examining the data in
-		   the writebuf routine, and remembering the result. */
-		for (i = 0; i < 512; i++) {
-			if (dat[i] == 0xff) continue;
-			emptymatch = 0;
-			break;
-		}
-	}
-	/* If emptymatch still =1, we do have an all-0xff data buffer.
-	   Return all-0xff ecc value instead of the computed one, so
-	   it'll look just like a freshly-erased page. */
-	if (emptymatch) memset(ecc_code, 0xff, 6);
-#endif
-	return 0;
-}
-
-static int doc200x_correct_data(struct mtd_info *mtd, u_char *dat, u_char *read_ecc, u_char *calc_ecc)
-{
-	int i, ret = 0;
-	struct nand_chip *this = mtd->priv;
-	struct doc_priv *doc = this->priv;
-	void __iomem *docptr = doc->virtadr;
-	volatile u_char dummy;
-	int emptymatch = 1;
-
-	/* flush the pipeline */
-	if (DoC_is_2000(doc)) {
-		dummy = ReadDOC(docptr, 2k_ECCStatus);
-		dummy = ReadDOC(docptr, 2k_ECCStatus);
-		dummy = ReadDOC(docptr, 2k_ECCStatus);
-	} else if (DoC_is_MillenniumPlus(doc)) {
-		dummy = ReadDOC(docptr, Mplus_ECCConf);
-		dummy = ReadDOC(docptr, Mplus_ECCConf);
-		dummy = ReadDOC(docptr, Mplus_ECCConf);
-	} else {
-		dummy = ReadDOC(docptr, ECCConf);
-		dummy = ReadDOC(docptr, ECCConf);
-		dummy = ReadDOC(docptr, ECCConf);
-	}
-
-	/* Error occured ? */
-	if (dummy & 0x80) {
-		for (i = 0; i < 6; i++) {
-			if (DoC_is_MillenniumPlus(doc))
-				calc_ecc[i] = ReadDOC_(docptr, DoC_Mplus_ECCSyndrome0 + i);
-			else
-				calc_ecc[i] = ReadDOC_(docptr, DoC_ECCSyndrome0 + i);
-			if (calc_ecc[i] != empty_read_syndrome[i])
-				emptymatch = 0;
-		}
-		/* If emptymatch=1, the read syndrome is consistent with an
-		   all-0xff data and stored ecc block.  Check the stored ecc. */
-		if (emptymatch) {
-			for (i = 0; i < 6; i++) {
-				if (read_ecc[i] == 0xff) continue;
-				emptymatch = 0;
-				break;
-			}
-		}
-		/* If emptymatch still =1, check the data block. */
-		if (emptymatch) {
-		/* Note: this somewhat expensive test should not be triggered
-		   often.  It could be optimized away by examining the data in
-		   the readbuf routine, and remembering the result. */
-			for (i = 0; i < 512; i++) {
-				if (dat[i] == 0xff) continue;
-				emptymatch = 0;
-				break;
-			}
-		}
-		/* If emptymatch still =1, this is almost certainly a freshly-
-		   erased block, in which case the ECC will not come out right.
-		   We'll suppress the error and tell the caller everything's
-		   OK.  Because it is. */
-		if (!emptymatch) ret = doc_ecc_decode (rs_decoder, dat, calc_ecc);
-		if (ret > 0)
-			printk(KERN_ERR "doc200x_correct_data corrected %d errors\n", ret);
-	}
-	if (DoC_is_MillenniumPlus(doc))
-		WriteDOC(DOC_ECC_DIS, docptr, Mplus_ECCConf);
-	else
-		WriteDOC(DOC_ECC_DIS, docptr, ECCConf);
-	if (no_ecc_failures && (ret == -1)) {
-		printk(KERN_ERR "suppressing ECC failure\n");
-		ret = 0;
-	}
-	return ret;
-}
-
-/*u_char mydatabuf[528]; */
-
-static struct nand_oobinfo doc200x_oobinfo = {
-	.useecc = MTD_NANDECC_AUTOPLACE,
-	.eccbytes = 6,
-	.eccpos = {0, 1, 2, 3, 4, 5},
-	.oobfree = { {8, 8} }
-};
-
-/* Find the (I)NFTL Media Header, and optionally also the mirror media header.
-   On sucessful return, buf will contain a copy of the media header for
-   further processing.  id is the string to scan for, and will presumably be
-   either "ANAND" or "BNAND".  If findmirror=1, also look for the mirror media
-   header.  The page #s of the found media headers are placed in mh0_page and
-   mh1_page in the DOC private structure. */
-static int __init find_media_headers(struct mtd_info *mtd, u_char *buf,
-				     const char *id, int findmirror)
-{
-	struct nand_chip *this = mtd->priv;
-	struct doc_priv *doc = this->priv;
-	unsigned offs, end = (MAX_MEDIAHEADER_SCAN << this->phys_erase_shift);
-	int ret;
-	size_t retlen;
-
-	end = min(end, mtd->size); /* paranoia */
-	for (offs = 0; offs < end; offs += mtd->erasesize) {
-		ret = mtd->read(mtd, offs, mtd->oobblock, &retlen, buf);
-		if (retlen != mtd->oobblock) continue;
-		if (ret) {
-			printk(KERN_WARNING "ECC error scanning DOC at 0x%x\n",
-				offs);
-		}
-		if (memcmp(buf, id, 6)) continue;
-		printk(KERN_INFO "Found DiskOnChip %s Media Header at 0x%x\n", id, offs);
-		if (doc->mh0_page == -1) {
-			doc->mh0_page = offs >> this->page_shift;
-			if (!findmirror) return 1;
-			continue;
-		}
-		doc->mh1_page = offs >> this->page_shift;
-		return 2;
-	}
-	if (doc->mh0_page == -1) {
-		printk(KERN_WARNING "DiskOnChip %s Media Header not found.\n", id);
-		return 0;
-	}
-	/* Only one mediaheader was found.  We want buf to contain a
-	   mediaheader on return, so we'll have to re-read the one we found. */
-	offs = doc->mh0_page << this->page_shift;
-	ret = mtd->read(mtd, offs, mtd->oobblock, &retlen, buf);
-	if (retlen != mtd->oobblock) {
-		/* Insanity.  Give up. */
-		printk(KERN_ERR "Read DiskOnChip Media Header once, but can't reread it???\n");
-		return 0;
-	}
-	return 1;
-}
-
-static inline int __init nftl_partscan(struct mtd_info *mtd,
-				struct mtd_partition *parts)
-{
-	struct nand_chip *this = mtd->priv;
-	struct doc_priv *doc = this->priv;
-	int ret = 0;
-	u_char *buf;
-	struct NFTLMediaHeader *mh;
-	const unsigned psize = 1 << this->page_shift;
-	unsigned blocks, maxblocks;
-	int offs, numheaders;
-
-	buf = kmalloc(mtd->oobblock, GFP_KERNEL);
-	if (!buf) {
-		printk(KERN_ERR "DiskOnChip mediaheader kmalloc failed!\n");
-		return 0;
-	}
-	if (!(numheaders=find_media_headers(mtd, buf, "ANAND", 1))) goto out;
-	mh = (struct NFTLMediaHeader *) buf;
-
-/*#ifdef CONFIG_MTD_DEBUG_VERBOSE */
-/*	if (CONFIG_MTD_DEBUG_VERBOSE >= 2) */
-	printk(KERN_INFO "    DataOrgID        = %s\n"
-			 "    NumEraseUnits    = %d\n"
-			 "    FirstPhysicalEUN = %d\n"
-			 "    FormattedSize    = %d\n"
-			 "    UnitSizeFactor   = %d\n",
-		mh->DataOrgID, mh->NumEraseUnits,
-		mh->FirstPhysicalEUN, mh->FormattedSize,
-		mh->UnitSizeFactor);
-/*#endif */
-
-	blocks = mtd->size >> this->phys_erase_shift;
-	maxblocks = min(32768U, mtd->erasesize - psize);
-
-	if (mh->UnitSizeFactor == 0x00) {
-		/* Auto-determine UnitSizeFactor.  The constraints are:
-		   - There can be at most 32768 virtual blocks.
-		   - There can be at most (virtual block size - page size)
-		     virtual blocks (because MediaHeader+BBT must fit in 1).
-		*/
-		mh->UnitSizeFactor = 0xff;
-		while (blocks > maxblocks) {
-			blocks >>= 1;
-			maxblocks = min(32768U, (maxblocks << 1) + psize);
-			mh->UnitSizeFactor--;
-		}
-		printk(KERN_WARNING "UnitSizeFactor=0x00 detected.  Correct value is assumed to be 0x%02x.\n", mh->UnitSizeFactor);
-	}
-
-	/* NOTE: The lines below modify internal variables of the NAND and MTD
-	   layers; variables with have already been configured by nand_scan.
-	   Unfortunately, we didn't know before this point what these values
-	   should be.  Thus, this code is somewhat dependant on the exact
-	   implementation of the NAND layer.  */
-	if (mh->UnitSizeFactor != 0xff) {
-		this->bbt_erase_shift += (0xff - mh->UnitSizeFactor);
-		mtd->erasesize <<= (0xff - mh->UnitSizeFactor);
-		printk(KERN_INFO "Setting virtual erase size to %d\n", mtd->erasesize);
-		blocks = mtd->size >> this->bbt_erase_shift;
-		maxblocks = min(32768U, mtd->erasesize - psize);
-	}
-
-	if (blocks > maxblocks) {
-		printk(KERN_ERR "UnitSizeFactor of 0x%02x is inconsistent with device size.  Aborting.\n", mh->UnitSizeFactor);
-		goto out;
-	}
-
-	/* Skip past the media headers. */
-	offs = max(doc->mh0_page, doc->mh1_page);
-	offs <<= this->page_shift;
-	offs += mtd->erasesize;
-
-	/*parts[0].name = " DiskOnChip Boot / Media Header partition"; */
-	/*parts[0].offset = 0; */
-	/*parts[0].size = offs; */
-
-	parts[0].name = " DiskOnChip BDTL partition";
-	parts[0].offset = offs;
-	parts[0].size = (mh->NumEraseUnits - numheaders) << this->bbt_erase_shift;
-
-	offs += parts[0].size;
-	if (offs < mtd->size) {
-		parts[1].name = " DiskOnChip Remainder partition";
-		parts[1].offset = offs;
-		parts[1].size = mtd->size - offs;
-		ret = 2;
-		goto out;
-	}
-	ret = 1;
-out:
-	kfree(buf);
-	return ret;
-}
-
-/* This is a stripped-down copy of the code in inftlmount.c */
-static inline int __init inftl_partscan(struct mtd_info *mtd,
-				 struct mtd_partition *parts)
-{
-	struct nand_chip *this = mtd->priv;
-	struct doc_priv *doc = this->priv;
-	int ret = 0;
-	u_char *buf;
-	struct INFTLMediaHeader *mh;
-	struct INFTLPartition *ip;
-	int numparts = 0;
-	int blocks;
-	int vshift, lastvunit = 0;
-	int i;
-	int end = mtd->size;
-
-	if (inftl_bbt_write)
-		end -= (INFTL_BBT_RESERVED_BLOCKS << this->phys_erase_shift);
-
-	buf = kmalloc(mtd->oobblock, GFP_KERNEL);
-	if (!buf) {
-		printk(KERN_ERR "DiskOnChip mediaheader kmalloc failed!\n");
-		return 0;
-	}
-
-	if (!find_media_headers(mtd, buf, "BNAND", 0)) goto out;
-	doc->mh1_page = doc->mh0_page + (4096 >> this->page_shift);
-	mh = (struct INFTLMediaHeader *) buf;
-
-	mh->NoOfBootImageBlocks = le32_to_cpu(mh->NoOfBootImageBlocks);
-	mh->NoOfBinaryPartitions = le32_to_cpu(mh->NoOfBinaryPartitions);
-	mh->NoOfBDTLPartitions = le32_to_cpu(mh->NoOfBDTLPartitions);
-	mh->BlockMultiplierBits = le32_to_cpu(mh->BlockMultiplierBits);
-	mh->FormatFlags = le32_to_cpu(mh->FormatFlags);
-	mh->PercentUsed = le32_to_cpu(mh->PercentUsed);
-
-/*#ifdef CONFIG_MTD_DEBUG_VERBOSE */
-/*	if (CONFIG_MTD_DEBUG_VERBOSE >= 2) */
-	printk(KERN_INFO "    bootRecordID          = %s\n"
-			 "    NoOfBootImageBlocks   = %d\n"
-			 "    NoOfBinaryPartitions  = %d\n"
-			 "    NoOfBDTLPartitions    = %d\n"
-			 "    BlockMultiplerBits    = %d\n"
-			 "    FormatFlgs            = %d\n"
-			 "    OsakVersion           = %d.%d.%d.%d\n"
-			 "    PercentUsed           = %d\n",
-		mh->bootRecordID, mh->NoOfBootImageBlocks,
-		mh->NoOfBinaryPartitions,
-		mh->NoOfBDTLPartitions,
-		mh->BlockMultiplierBits, mh->FormatFlags,
-		((unsigned char *) &mh->OsakVersion)[0] & 0xf,
-		((unsigned char *) &mh->OsakVersion)[1] & 0xf,
-		((unsigned char *) &mh->OsakVersion)[2] & 0xf,
-		((unsigned char *) &mh->OsakVersion)[3] & 0xf,
-		mh->PercentUsed);
-/*#endif */
-
-	vshift = this->phys_erase_shift + mh->BlockMultiplierBits;
-
-	blocks = mtd->size >> vshift;
-	if (blocks > 32768) {
-		printk(KERN_ERR "BlockMultiplierBits=%d is inconsistent with device size.  Aborting.\n", mh->BlockMultiplierBits);
-		goto out;
-	}
-
-	blocks = doc->chips_per_floor << (this->chip_shift - this->phys_erase_shift);
-	if (inftl_bbt_write && (blocks > mtd->erasesize)) {
-		printk(KERN_ERR "Writeable BBTs spanning more than one erase block are not yet supported.  FIX ME!\n");
-		goto out;
-	}
-
-	/* Scan the partitions */
-	for (i = 0; (i < 4); i++) {
-		ip = &(mh->Partitions[i]);
-		ip->virtualUnits = le32_to_cpu(ip->virtualUnits);
-		ip->firstUnit = le32_to_cpu(ip->firstUnit);
-		ip->lastUnit = le32_to_cpu(ip->lastUnit);
-		ip->flags = le32_to_cpu(ip->flags);
-		ip->spareUnits = le32_to_cpu(ip->spareUnits);
-		ip->Reserved0 = le32_to_cpu(ip->Reserved0);
-
-/*#ifdef CONFIG_MTD_DEBUG_VERBOSE */
-/*		if (CONFIG_MTD_DEBUG_VERBOSE >= 2) */
-		printk(KERN_INFO	"    PARTITION[%d] ->\n"
-			"        virtualUnits    = %d\n"
-			"        firstUnit       = %d\n"
-			"        lastUnit        = %d\n"
-			"        flags           = 0x%x\n"
-			"        spareUnits      = %d\n",
-			i, ip->virtualUnits, ip->firstUnit,
-			ip->lastUnit, ip->flags,
-			ip->spareUnits);
-/*#endif */
-
-/*
-		if ((i == 0) && (ip->firstUnit > 0)) {
-			parts[0].name = " DiskOnChip IPL / Media Header partition";
-			parts[0].offset = 0;
-			parts[0].size = mtd->erasesize * ip->firstUnit;
-			numparts = 1;
-		}
-*/
-
-		if (ip->flags & INFTL_BINARY)
-			parts[numparts].name = " DiskOnChip BDK partition";
-		else
-			parts[numparts].name = " DiskOnChip BDTL partition";
-		parts[numparts].offset = ip->firstUnit << vshift;
-		parts[numparts].size = (1 + ip->lastUnit - ip->firstUnit) << vshift;
-		numparts++;
-		if (ip->lastUnit > lastvunit) lastvunit = ip->lastUnit;
-		if (ip->flags & INFTL_LAST) break;
-	}
-	lastvunit++;
-	if ((lastvunit << vshift) < end) {
-		parts[numparts].name = " DiskOnChip Remainder partition";
-		parts[numparts].offset = lastvunit << vshift;
-		parts[numparts].size = end - parts[numparts].offset;
-		numparts++;
-	}
-	ret = numparts;
-out:
-	kfree(buf);
-	return ret;
-}
-
-static int __init nftl_scan_bbt(struct mtd_info *mtd)
-{
-	int ret, numparts;
-	struct nand_chip *this = mtd->priv;
-	struct doc_priv *doc = this->priv;
-	struct mtd_partition parts[2];
-
-	memset((char *) parts, 0, sizeof(parts));
-	/* On NFTL, we have to find the media headers before we can read the
-	   BBTs, since they're stored in the media header eraseblocks. */
-	numparts = nftl_partscan(mtd, parts);
-	if (!numparts) return -EIO;
-	this->bbt_td->options = NAND_BBT_ABSPAGE | NAND_BBT_8BIT |
-				NAND_BBT_SAVECONTENT | NAND_BBT_WRITE |
-				NAND_BBT_VERSION;
-	this->bbt_td->veroffs = 7;
-	this->bbt_td->pages[0] = doc->mh0_page + 1;
-	if (doc->mh1_page != -1) {
-		this->bbt_md->options = NAND_BBT_ABSPAGE | NAND_BBT_8BIT |
-					NAND_BBT_SAVECONTENT | NAND_BBT_WRITE |
-					NAND_BBT_VERSION;
-		this->bbt_md->veroffs = 7;
-		this->bbt_md->pages[0] = doc->mh1_page + 1;
-	} else {
-		this->bbt_md = NULL;
-	}
-
-	/* It's safe to set bd=NULL below because NAND_BBT_CREATE is not set.
-	   At least as nand_bbt.c is currently written. */
-	if ((ret = nand_scan_bbt(mtd, NULL)))
-		return ret;
-	add_mtd_device(mtd, "nand");
-#ifdef CONFIG_MTD_PARTITIONS
-	if (!no_autopart)
-		add_mtd_partitions(mtd, parts, numparts);
-#endif
-	return 0;
-}
-
-static int __init inftl_scan_bbt(struct mtd_info *mtd)
-{
-	int ret, numparts;
-	struct nand_chip *this = mtd->priv;
-	struct doc_priv *doc = this->priv;
-	struct mtd_partition parts[5];
-
-	if (this->numchips > doc->chips_per_floor) {
-		printk(KERN_ERR "Multi-floor INFTL devices not yet supported.\n");
-		return -EIO;
-	}
-
-	if (DoC_is_MillenniumPlus(doc)) {
-		this->bbt_td->options = NAND_BBT_2BIT | NAND_BBT_ABSPAGE;
-		if (inftl_bbt_write)
-			this->bbt_td->options |= NAND_BBT_WRITE;
-		this->bbt_td->pages[0] = 2;
-		this->bbt_md = NULL;
-	} else {
-		this->bbt_td->options = NAND_BBT_LASTBLOCK | NAND_BBT_8BIT |
-					NAND_BBT_VERSION;
-		if (inftl_bbt_write)
-			this->bbt_td->options |= NAND_BBT_WRITE;
-		this->bbt_td->offs = 8;
-		this->bbt_td->len = 8;
-		this->bbt_td->veroffs = 7;
-		this->bbt_td->maxblocks = INFTL_BBT_RESERVED_BLOCKS;
-		this->bbt_td->reserved_block_code = 0x01;
-		this->bbt_td->pattern = "MSYS_BBT";
-
-		this->bbt_md->options = NAND_BBT_LASTBLOCK | NAND_BBT_8BIT |
-					NAND_BBT_VERSION;
-		if (inftl_bbt_write)
-			this->bbt_md->options |= NAND_BBT_WRITE;
-		this->bbt_md->offs = 8;
-		this->bbt_md->len = 8;
-		this->bbt_md->veroffs = 7;
-		this->bbt_md->maxblocks = INFTL_BBT_RESERVED_BLOCKS;
-		this->bbt_md->reserved_block_code = 0x01;
-		this->bbt_md->pattern = "TBB_SYSM";
-	}
-
-	/* It's safe to set bd=NULL below because NAND_BBT_CREATE is not set.
-	   At least as nand_bbt.c is currently written. */
-	if ((ret = nand_scan_bbt(mtd, NULL)))
-		return ret;
-	memset((char *) parts, 0, sizeof(parts));
-	numparts = inftl_partscan(mtd, parts);
-	/* At least for now, require the INFTL Media Header.  We could probably
-	   do without it for non-INFTL use, since all it gives us is
-	   autopartitioning, but I want to give it more thought. */
-	if (!numparts) return -EIO;
-	add_mtd_device(mtd, "nand");
-#ifdef CONFIG_MTD_PARTITIONS
-	if (!no_autopart)
-		add_mtd_partitions(mtd, parts, numparts);
-#endif
-	return 0;
-}
-
-static inline int __init doc2000_init(struct mtd_info *mtd)
-{
-	struct nand_chip *this = mtd->priv;
-	struct doc_priv *doc = this->priv;
-
-	this->write_byte = doc2000_write_byte;
-	this->read_byte = doc2000_read_byte;
-	this->write_buf = doc2000_writebuf;
-	this->read_buf = doc2000_readbuf;
-	this->verify_buf = doc2000_verifybuf;
-	this->scan_bbt = nftl_scan_bbt;
-
-	doc->CDSNControl = CDSN_CTRL_FLASH_IO | CDSN_CTRL_ECC_IO;
-	doc2000_count_chips(mtd);
-	mtd->name = "DiskOnChip 2000 (NFTL Model)";
-	return (4 * doc->chips_per_floor);
-}
-
-static inline int __init doc2001_init(struct mtd_info *mtd)
-{
-	struct nand_chip *this = mtd->priv;
-	struct doc_priv *doc = this->priv;
-
-	this->write_byte = doc2001_write_byte;
-	this->read_byte = doc2001_read_byte;
-	this->write_buf = doc2001_writebuf;
-	this->read_buf = doc2001_readbuf;
-	this->verify_buf = doc2001_verifybuf;
-
-	ReadDOC(doc->virtadr, ChipID);
-	ReadDOC(doc->virtadr, ChipID);
-	ReadDOC(doc->virtadr, ChipID);
-	if (ReadDOC(doc->virtadr, ChipID) != DOC_ChipID_DocMil) {
-		/* It's not a Millennium; it's one of the newer
-		   DiskOnChip 2000 units with a similar ASIC.
-		   Treat it like a Millennium, except that it
-		   can have multiple chips. */
-		doc2000_count_chips(mtd);
-		mtd->name = "DiskOnChip 2000 (INFTL Model)";
-		this->scan_bbt = inftl_scan_bbt;
-		return (4 * doc->chips_per_floor);
-	} else {
-		/* Bog-standard Millennium */
-		doc->chips_per_floor = 1;
-		mtd->name = "DiskOnChip Millennium";
-		this->scan_bbt = nftl_scan_bbt;
-		return 1;
-	}
-}
-
-static inline int __init doc2001plus_init(struct mtd_info *mtd)
-{
-	struct nand_chip *this = mtd->priv;
-	struct doc_priv *doc = this->priv;
-
-	this->write_byte = NULL;
-	this->read_byte = doc2001plus_read_byte;
-	this->write_buf = doc2001plus_writebuf;
-	this->read_buf = doc2001plus_readbuf;
-	this->verify_buf = doc2001plus_verifybuf;
-	this->scan_bbt = inftl_scan_bbt;
-	this->hwcontrol = NULL;
-	this->select_chip = doc2001plus_select_chip;
-	this->cmdfunc = doc2001plus_command;
-	this->enable_hwecc = doc2001plus_enable_hwecc;
-
-	doc->chips_per_floor = 1;
-	mtd->name = "DiskOnChip Millennium Plus";
-
-	return 1;
-}
-
-static inline int __init doc_probe(unsigned long physadr)
-{
-	unsigned char ChipID;
-	struct mtd_info *mtd;
-	struct nand_chip *nand;
-	struct doc_priv *doc;
-	void __iomem *virtadr;
-	unsigned char save_control;
-	unsigned char tmp, tmpb, tmpc;
-	int reg, len, numchips;
-	int ret = 0;
-
-	virtadr = ioremap(physadr, DOC_IOREMAP_LEN);
-	if (!virtadr) {
-		printk(KERN_ERR "Diskonchip ioremap failed: 0x%x bytes at 0x%lx\n", DOC_IOREMAP_LEN, physadr);
-		return -EIO;
-	}
-
-	/* It's not possible to cleanly detect the DiskOnChip - the
-	 * bootup procedure will put the device into reset mode, and
-	 * it's not possible to talk to it without actually writing
-	 * to the DOCControl register. So we store the current contents
-	 * of the DOCControl register's location, in case we later decide
-	 * that it's not a DiskOnChip, and want to put it back how we
-	 * found it.
-	 */
-	save_control = ReadDOC(virtadr, DOCControl);
-
-	/* Reset the DiskOnChip ASIC */
-	WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_RESET,
-		 virtadr, DOCControl);
-	WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_RESET,
-		 virtadr, DOCControl);
-
-	/* Enable the DiskOnChip ASIC */
-	WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_NORMAL,
-		 virtadr, DOCControl);
-	WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_NORMAL,
-		 virtadr, DOCControl);
-
-	ChipID = ReadDOC(virtadr, ChipID);
-
-	switch(ChipID) {
-	case DOC_ChipID_Doc2k:
-		reg = DoC_2k_ECCStatus;
-		break;
-	case DOC_ChipID_DocMil:
-		reg = DoC_ECCConf;
-		break;
-	case DOC_ChipID_DocMilPlus16:
-	case DOC_ChipID_DocMilPlus32:
-	case 0:
-		/* Possible Millennium Plus, need to do more checks */
-		/* Possibly release from power down mode */
-		for (tmp = 0; (tmp < 4); tmp++)
-			ReadDOC(virtadr, Mplus_Power);
-
-		/* Reset the Millennium Plus ASIC */
-		tmp = DOC_MODE_RESET | DOC_MODE_MDWREN | DOC_MODE_RST_LAT |
-			DOC_MODE_BDECT;
-		WriteDOC(tmp, virtadr, Mplus_DOCControl);
-		WriteDOC(~tmp, virtadr, Mplus_CtrlConfirm);
-
-		mdelay(1);
-		/* Enable the Millennium Plus ASIC */
-		tmp = DOC_MODE_NORMAL | DOC_MODE_MDWREN | DOC_MODE_RST_LAT |
-			DOC_MODE_BDECT;
-		WriteDOC(tmp, virtadr, Mplus_DOCControl);
-		WriteDOC(~tmp, virtadr, Mplus_CtrlConfirm);
-		mdelay(1);
-
-		ChipID = ReadDOC(virtadr, ChipID);
-
-		switch (ChipID) {
-		case DOC_ChipID_DocMilPlus16:
-			reg = DoC_Mplus_Toggle;
-			break;
-		case DOC_ChipID_DocMilPlus32:
-			printk(KERN_ERR "DiskOnChip Millennium Plus 32MB is not supported, ignoring.\n");
-		default:
-			ret = -ENODEV;
-			goto notfound;
-		}
-		break;
-
-	default:
-		ret = -ENODEV;
-		goto notfound;
-	}
-	/* Check the TOGGLE bit in the ECC register */
-	tmp  = ReadDOC_(virtadr, reg) & DOC_TOGGLE_BIT;
-	tmpb = ReadDOC_(virtadr, reg) & DOC_TOGGLE_BIT;
-	tmpc = ReadDOC_(virtadr, reg) & DOC_TOGGLE_BIT;
-	if ((tmp == tmpb) || (tmp != tmpc)) {
-		printk(KERN_WARNING "Possible DiskOnChip at 0x%lx failed TOGGLE test, dropping.\n", physadr);
-		ret = -ENODEV;
-		goto notfound;
-	}
-
-	for (mtd = doclist; mtd; mtd = doc->nextdoc) {
-		unsigned char oldval;
-		unsigned char newval;
-		nand = mtd->priv;
-		doc = nand->priv;
-		/* Use the alias resolution register to determine if this is
-		   in fact the same DOC aliased to a new address.  If writes
-		   to one chip's alias resolution register change the value on
-		   the other chip, they're the same chip. */
-		if (ChipID == DOC_ChipID_DocMilPlus16) {
-			oldval = ReadDOC(doc->virtadr, Mplus_AliasResolution);
-			newval = ReadDOC(virtadr, Mplus_AliasResolution);
-		} else {
-			oldval = ReadDOC(doc->virtadr, AliasResolution);
-			newval = ReadDOC(virtadr, AliasResolution);
-		}
-		if (oldval != newval)
-			continue;
-		if (ChipID == DOC_ChipID_DocMilPlus16) {
-			WriteDOC(~newval, virtadr, Mplus_AliasResolution);
-			oldval = ReadDOC(doc->virtadr, Mplus_AliasResolution);
-			WriteDOC(newval, virtadr, Mplus_AliasResolution); /* restore it */
-		} else {
-			WriteDOC(~newval, virtadr, AliasResolution);
-			oldval = ReadDOC(doc->virtadr, AliasResolution);
-			WriteDOC(newval, virtadr, AliasResolution); /* restore it */
-		}
-		newval = ~newval;
-		if (oldval == newval) {
-			printk(KERN_DEBUG "Found alias of DOC at 0x%lx to 0x%lx\n", doc->physadr, physadr);
-			goto notfound;
-		}
-	}
-
-	printk(KERN_NOTICE "DiskOnChip found at 0x%lx\n", physadr);
-
-	len = sizeof(struct mtd_info) +
-	      sizeof(struct nand_chip) +
-	      sizeof(struct doc_priv) +
-	      (2 * sizeof(struct nand_bbt_descr));
-	mtd =  kmalloc(len, GFP_KERNEL);
-	if (!mtd) {
-		printk(KERN_ERR "DiskOnChip kmalloc (%d bytes) failed!\n", len);
-		ret = -ENOMEM;
-		goto fail;
-	}
-	memset(mtd, 0, len);
-
-	nand			= (struct nand_chip *) (mtd + 1);
-	doc			= (struct doc_priv *) (nand + 1);
-	nand->bbt_td		= (struct nand_bbt_descr *) (doc + 1);
-	nand->bbt_md		= nand->bbt_td + 1;
-
-	mtd->priv		= nand;
-	mtd->owner		= THIS_MODULE;
-
-	nand->priv		= doc;
-	nand->select_chip	= doc200x_select_chip;
-	nand->hwcontrol		= doc200x_hwcontrol;
-	nand->dev_ready		= doc200x_dev_ready;
-	nand->waitfunc		= doc200x_wait;
-	nand->block_bad		= doc200x_block_bad;
-	nand->enable_hwecc	= doc200x_enable_hwecc;
-	nand->calculate_ecc	= doc200x_calculate_ecc;
-	nand->correct_data	= doc200x_correct_data;
-
-	nand->autooob		= &doc200x_oobinfo;
-	nand->eccmode		= NAND_ECC_HW6_512;
-	nand->options		= NAND_USE_FLASH_BBT | NAND_HWECC_SYNDROME;
-
-	doc->physadr		= physadr;
-	doc->virtadr		= virtadr;
-	doc->ChipID		= ChipID;
-	doc->curfloor		= -1;
-	doc->curchip		= -1;
-	doc->mh0_page		= -1;
-	doc->mh1_page		= -1;
-	doc->nextdoc		= doclist;
-
-	if (ChipID == DOC_ChipID_Doc2k)
-		numchips = doc2000_init(mtd);
-	else if (ChipID == DOC_ChipID_DocMilPlus16)
-		numchips = doc2001plus_init(mtd);
-	else
-		numchips = doc2001_init(mtd);
-
-	if ((ret = nand_scan(mtd, numchips))) {
-		/* DBB note: i believe nand_release is necessary here, as
-		   buffers may have been allocated in nand_base.  Check with
-		   Thomas. FIX ME! */
-		/* nand_release will call del_mtd_device, but we haven't yet
-		   added it.  This is handled without incident by
-		   del_mtd_device, as far as I can tell. */
-		nand_release(mtd);
-		kfree(mtd);
-		goto fail;
-	}
-
-	/* Success! */
-	doclist = mtd;
-	return 0;
-
-notfound:
-	/* Put back the contents of the DOCControl register, in case it's not
-	   actually a DiskOnChip.  */
-	WriteDOC(save_control, virtadr, DOCControl);
-fail:
-	iounmap(virtadr);
-	return ret;
-}
-
-static void release_nanddoc(void)
-{
- 	struct mtd_info *mtd, *nextmtd;
-	struct nand_chip *nand;
-	struct doc_priv *doc;
-
-	for (mtd = doclist; mtd; mtd = nextmtd) {
-		nand = mtd->priv;
-		doc = nand->priv;
-
-		nextmtd = doc->nextdoc;
-		nand_release(mtd);
-		iounmap(doc->virtadr);
-		kfree(mtd);
-	}
-}
-
-static int __init init_nanddoc(void)
-{
-	int i, ret = 0;
-
-	/* We could create the decoder on demand, if memory is a concern.
-	 * This way we have it handy, if an error happens
-	 *
-	 * Symbolsize is 10 (bits)
-	 * Primitve polynomial is x^10+x^3+1
-	 * first consecutive root is 510
-	 * primitve element to generate roots = 1
-	 * generator polinomial degree = 4
-	 */
-	rs_decoder = init_rs(10, 0x409, FCR, 1, NROOTS);
- 	if (!rs_decoder) {
-		printk (KERN_ERR "DiskOnChip: Could not create a RS decoder\n");
-		return -ENOMEM;
-	}
-
-	if (doc_config_location) {
-		printk(KERN_INFO "Using configured DiskOnChip probe address 0x%lx\n", doc_config_location);
-		ret = doc_probe(doc_config_location);
-		if (ret < 0)
-			goto outerr;
-	} else {
-		for (i=0; (doc_locations[i] != 0xffffffff); i++) {
-			doc_probe(doc_locations[i]);
-		}
-	}
-	/* No banner message any more. Print a message if no DiskOnChip
-	   found, so the user knows we at least tried. */
-	if (!doclist) {
-		printk(KERN_INFO "No valid DiskOnChip devices found\n");
-		ret = -ENODEV;
-		goto outerr;
-	}
-	return 0;
-outerr:
-	free_rs(rs_decoder);
-	return ret;
-}
-
-static void __exit cleanup_nanddoc(void)
-{
-	/* Cleanup the nand/DoC resources */
-	release_nanddoc();
-
-	/* Free the reed solomon resources */
-	if (rs_decoder) {
-		free_rs(rs_decoder);
-	}
-}
-
-module_init(init_nanddoc);
-module_exit(cleanup_nanddoc);
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
-MODULE_DESCRIPTION("M-Systems DiskOnChip 2000, Millennium and Millennium Plus device driver\n");
-#endif
-- 
1.7.10


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