[MTD] NAND: Remove unmaintained tx49xx board drivers

The drivers are unmaintained since long and reference include files
which are not available in the kernel. Original author is not longer
responsible and no new maintainer showed up within 3 month.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

drivers/mtd/nand/Kconfig

@@ -58,20 +58,6 @@ config MTD_NAND_TOTO
 config MTD_NAND_IDS
 	tristate
 
-config MTD_NAND_TX4925NDFMC
-	tristate "SmartMedia Card on Toshiba RBTX4925 reference board"
-	depends on TOSHIBA_RBTX4925 && MTD_NAND && TOSHIBA_RBTX4925_MPLEX_NAND
-	help
-	  This enables the driver for the NAND flash device found on the
-	  Toshiba RBTX4925 reference board, which is a SmartMediaCard.
-
-config MTD_NAND_TX4938NDFMC
-	tristate "NAND Flash device on Toshiba RBTX4938 reference board"
-	depends on TOSHIBA_RBTX4938 && MTD_NAND && TOSHIBA_RBTX4938_MPLEX_NAND 
-	help
-	  This enables the driver for the NAND flash device found on the
-	  Toshiba RBTX4938 reference board.
-
 config MTD_NAND_AU1550
 	tristate "Au1550 NAND support"
 	depends on SOC_AU1550 && MTD_NAND

drivers/mtd/nand/Makefile

@@ -10,8 +10,6 @@ obj-$(CONFIG_MTD_NAND_SPIA)		+= spia.o
 obj-$(CONFIG_MTD_NAND_TOTO)		+= toto.o
 obj-$(CONFIG_MTD_NAND_AUTCPU12)		+= autcpu12.o
 obj-$(CONFIG_MTD_NAND_EDB7312)		+= edb7312.o
-obj-$(CONFIG_MTD_NAND_TX4925NDFMC)	+= tx4925ndfmc.o
-obj-$(CONFIG_MTD_NAND_TX4938NDFMC)	+= tx4938ndfmc.o
 obj-$(CONFIG_MTD_NAND_AU1550)		+= au1550nd.o
 obj-$(CONFIG_MTD_NAND_PPCHAMELEONEVB)	+= ppchameleonevb.o
 obj-$(CONFIG_MTD_NAND_S3C2410)		+= s3c2410.o

drivers/mtd/nand/tx4925ndfmc.c

@@ -1,416 +0,0 @@
-/*
- *  drivers/mtd/tx4925ndfmc.c
- *
- *  Overview:
- *   This is a device driver for the NAND flash device found on the
- *   Toshiba RBTX4925 reference board, which is a SmartMediaCard. It supports 
- *   16MiB, 32MiB and 64MiB cards.
- *
- * Author: MontaVista Software, Inc.  source@mvista.com
- *
- * Derived from drivers/mtd/autcpu12.c
- *       Copyright (c) 2001 Thomas Gleixner (gleixner@autronix.de)
- *
- * $Id: tx4925ndfmc.c,v 1.5 2004/10/05 13:50:20 gleixner Exp $
- *
- * Copyright (C) 2001 Toshiba Corporation 
- * 
- * 2003 (c) MontaVista Software, Inc. This file is licensed under
- * the terms of the GNU General Public License version 2. This program
- * is licensed "as is" without any warranty of any kind, whether express
- * or implied.
- *
- */
-
-#include <linux/slab.h>
-#include <linux/init.h>
-#include <linux/module.h>
-#include <linux/mtd/mtd.h>
-#include <linux/mtd/nand.h>
-#include <linux/mtd/partitions.h>
-#include <linux/delay.h>
-#include <asm/io.h>
-#include <asm/tx4925/tx4925_nand.h>
-
-extern struct nand_oobinfo jffs2_oobinfo;
-
-/*
- * MTD structure for RBTX4925 board
- */
-static struct mtd_info *tx4925ndfmc_mtd = NULL;
-
-/*
- * Define partitions for flash devices
- */
-
-static struct mtd_partition partition_info16k[] = {
-	{ .name = "RBTX4925 flash partition 1",
-	  .offset =  0,
-	  .size =    8 * 0x00100000 },
-	{ .name = "RBTX4925 flash partition 2",
-	  .offset =  8 * 0x00100000,
-	  .size =    8 * 0x00100000 },
-};
-
-static struct mtd_partition partition_info32k[] = {
-	{ .name = "RBTX4925 flash partition 1",
-	  .offset =  0,
-	  .size =    8 * 0x00100000 },
-	{ .name = "RBTX4925 flash partition 2",
-	  .offset = 8 * 0x00100000,
-	  .size =  24 * 0x00100000 },
-};
-
-static struct mtd_partition partition_info64k[] = {
-	{ .name = "User FS",
-	  .offset =  0,
-	  .size =   16 * 0x00100000 },
-	{ .name = "RBTX4925 flash partition 2",
-	  .offset = 16 * 0x00100000,
-	  .size =   48 * 0x00100000},
-};
-
-static struct mtd_partition partition_info128k[] = {
-	{ .name = "Skip bad section",
-	  .offset =  0,
-	  .size =   16 * 0x00100000 },
-	{ .name = "User FS",
-	  .offset = 16 * 0x00100000,
-	  .size =   112 * 0x00100000 },
-};
-#define NUM_PARTITIONS16K  2
-#define NUM_PARTITIONS32K  2
-#define NUM_PARTITIONS64K  2
-#define NUM_PARTITIONS128K 2
-
-/* 
- *	hardware specific access to control-lines
-*/
-static void tx4925ndfmc_hwcontrol(struct mtd_info *mtd, int cmd)
-{
-
-	switch(cmd){
-
-		case NAND_CTL_SETCLE: 
-			tx4925_ndfmcptr->mcr |= TX4925_NDFMCR_CLE;
-			break;
-		case NAND_CTL_CLRCLE:
-			tx4925_ndfmcptr->mcr &= ~TX4925_NDFMCR_CLE;
-			break;
-		case NAND_CTL_SETALE:
-			tx4925_ndfmcptr->mcr |= TX4925_NDFMCR_ALE;
-			break;
-		case NAND_CTL_CLRALE: 
-			tx4925_ndfmcptr->mcr &= ~TX4925_NDFMCR_ALE;
-			break;
-		case NAND_CTL_SETNCE:
-			tx4925_ndfmcptr->mcr |= TX4925_NDFMCR_CE;
-			break;
-		case NAND_CTL_CLRNCE:
-			tx4925_ndfmcptr->mcr &= ~TX4925_NDFMCR_CE;
-			break;
-		case NAND_CTL_SETWP:
-			tx4925_ndfmcptr->mcr |= TX4925_NDFMCR_WE;
-			break;
-		case NAND_CTL_CLRWP:
-			tx4925_ndfmcptr->mcr &= ~TX4925_NDFMCR_WE;
-			break;
-	}
-}
-
-/*
-*	read device ready pin
-*/
-static int tx4925ndfmc_device_ready(struct mtd_info *mtd)
-{
-	int ready;
-	ready = (tx4925_ndfmcptr->sr & TX4925_NDSFR_BUSY) ? 0 : 1;
-	return ready;
-}
-void tx4925ndfmc_enable_hwecc(struct mtd_info *mtd, int mode)
-{
-	/* reset first */
-	tx4925_ndfmcptr->mcr |= TX4925_NDFMCR_ECC_CNTL_MASK;
-	tx4925_ndfmcptr->mcr &= ~TX4925_NDFMCR_ECC_CNTL_MASK;
-	tx4925_ndfmcptr->mcr |= TX4925_NDFMCR_ECC_CNTL_ENAB;
-}
-static void tx4925ndfmc_disable_ecc(void)
-{
-	tx4925_ndfmcptr->mcr &= ~TX4925_NDFMCR_ECC_CNTL_MASK;
-}
-static void tx4925ndfmc_enable_read_ecc(void)
-{
-	tx4925_ndfmcptr->mcr &= ~TX4925_NDFMCR_ECC_CNTL_MASK;
-	tx4925_ndfmcptr->mcr |= TX4925_NDFMCR_ECC_CNTL_READ;
-}
-void tx4925ndfmc_readecc(struct mtd_info *mtd, const u_char *dat, u_char *ecc_code){
-	int i;
-	u_char *ecc = ecc_code;
-        tx4925ndfmc_enable_read_ecc();
-	for (i = 0;i < 6;i++,ecc++)
-		*ecc = tx4925_read_nfmc(&(tx4925_ndfmcptr->dtr));
-        tx4925ndfmc_disable_ecc();
-}
-void tx4925ndfmc_device_setup(void)
-{
-
-	*(unsigned char *)0xbb005000 &= ~0x08;
-
-        /* reset NDFMC */
-        tx4925_ndfmcptr->rstr |= TX4925_NDFRSTR_RST;
-	while (tx4925_ndfmcptr->rstr & TX4925_NDFRSTR_RST);       
-
-	/* setup BusSeparete, Hold Time, Strobe Pulse Width */
-	tx4925_ndfmcptr->mcr = TX4925_BSPRT ? TX4925_NDFMCR_BSPRT : 0;
-	tx4925_ndfmcptr->spr = TX4925_HOLD << 4 | TX4925_SPW;             
-}
-static u_char tx4925ndfmc_nand_read_byte(struct mtd_info *mtd)
-{
-        struct nand_chip *this = mtd->priv;
-        return tx4925_read_nfmc(this->IO_ADDR_R);
-}
-
-static void tx4925ndfmc_nand_write_byte(struct mtd_info *mtd, u_char byte)
-{
-        struct nand_chip *this = mtd->priv;
-        tx4925_write_nfmc(byte, this->IO_ADDR_W);
-}
-
-static void tx4925ndfmc_nand_write_buf(struct mtd_info *mtd, const u_char *buf, int len)
-{
-	int i;
-	struct nand_chip *this = mtd->priv;
-
-	for (i=0; i<len; i++)
-		tx4925_write_nfmc(buf[i], this->IO_ADDR_W);
-}
-
-static void tx4925ndfmc_nand_read_buf(struct mtd_info *mtd, u_char *buf, int len)
-{
-	int i;
-	struct nand_chip *this = mtd->priv;
-
-	for (i=0; i<len; i++)
-		buf[i] = tx4925_read_nfmc(this->IO_ADDR_R);
-}
-
-static int tx4925ndfmc_nand_verify_buf(struct mtd_info *mtd, const u_char *buf, int len)
-{
-	int i;
-	struct nand_chip *this = mtd->priv;
-
-	for (i=0; i<len; i++)
-		if (buf[i] != tx4925_read_nfmc(this->IO_ADDR_R))
-			return -EFAULT;
-
-	return 0;
-}
-
-/*
- * Send command to NAND device
- */
-static void tx4925ndfmc_nand_command (struct mtd_info *mtd, unsigned command, int column, int page_addr)
-{
-	register struct nand_chip *this = mtd->priv;
-
-	/* Begin command latch cycle */
-	this->hwcontrol(mtd, NAND_CTL_SETCLE);
-	/*
-	 * 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;
-		}
-		this->write_byte(mtd, readcmd);
-	}
-	this->write_byte(mtd, command);
-
-	/* Set ALE and clear CLE to start address cycle */
-	this->hwcontrol(mtd, NAND_CTL_CLRCLE);
-
-	if (column != -1 || page_addr != -1) {
-		this->hwcontrol(mtd, NAND_CTL_SETALE);
-
-		/* Serially input address */
-		if (column != -1)
-			this->write_byte(mtd, column);
-		if (page_addr != -1) {
-			this->write_byte(mtd, (unsigned char) (page_addr & 0xff));
-			this->write_byte(mtd, (unsigned char) ((page_addr >> 8) & 0xff));
-			/* One more address cycle for higher density devices */
-			if (mtd->size & 0x0c000000) 
-				this->write_byte(mtd, (unsigned char) ((page_addr >> 16) & 0x0f));
-		}
-		/* Latch in address */
-		this->hwcontrol(mtd, NAND_CTL_CLRALE);
-	}
-	
-	/* 
-	 * program and erase have their own busy handlers 
-	 * status and sequential in needs no delay
-	*/
-	switch (command) {
-			
-	case NAND_CMD_PAGEPROG:
-		/* Turn off WE */
-		this->hwcontrol (mtd, NAND_CTL_CLRWP);
-                return;
-
-	case NAND_CMD_SEQIN:
-		/* Turn on WE */
-		this->hwcontrol (mtd, NAND_CTL_SETWP);
-                return;
-
-	case NAND_CMD_ERASE1:
-	case NAND_CMD_ERASE2:
-	case NAND_CMD_STATUS:
-		return;
-
-	case NAND_CMD_RESET:
-		if (this->dev_ready)	
-			break;
-		this->hwcontrol(mtd, NAND_CTL_SETCLE);
-		this->write_byte(mtd, NAND_CMD_STATUS);
-		this->hwcontrol(mtd, NAND_CTL_CLRCLE);
-		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;
-		}	
-	}
-	
-	/* wait until command is processed */
-	while (!this->dev_ready(mtd));
-}
-
-#ifdef CONFIG_MTD_CMDLINE_PARTS
-extern int parse_cmdline_partitions(struct mtd_info *master, struct mtd_partitio
-n **pparts, char *);
-#endif
-
-/*
- * Main initialization routine
- */
-extern int nand_correct_data(struct mtd_info *mtd, u_char *dat, u_char *read_ecc, u_char *calc_ecc);
-int __init tx4925ndfmc_init (void)
-{
-	struct nand_chip *this;
-	int err = 0;
-
-	/* Allocate memory for MTD device structure and private data */
-	tx4925ndfmc_mtd = kmalloc (sizeof(struct mtd_info) + sizeof (struct nand_chip),
-				GFP_KERNEL);
-	if (!tx4925ndfmc_mtd) {
-		printk ("Unable to allocate RBTX4925 NAND MTD device structure.\n");
-		err = -ENOMEM;
-		goto out;
-	}
-
-        tx4925ndfmc_device_setup();
-
-	/* io is indirect via a register so don't need to ioremap address */
-
-	/* Get pointer to private data */
-	this = (struct nand_chip *) (&tx4925ndfmc_mtd[1]);
-
-	/* Initialize structures */
-	memset((char *) tx4925ndfmc_mtd, 0, sizeof(struct mtd_info));
-	memset((char *) this, 0, sizeof(struct nand_chip));
-
-	/* Link the private data with the MTD structure */
-	tx4925ndfmc_mtd->priv = this;
-
-	/* Set address of NAND IO lines */
-	this->IO_ADDR_R = (void __iomem *)&(tx4925_ndfmcptr->dtr);
-	this->IO_ADDR_W = (void __iomem *)&(tx4925_ndfmcptr->dtr);
-	this->hwcontrol = tx4925ndfmc_hwcontrol;
-	this->enable_hwecc = tx4925ndfmc_enable_hwecc;
-	this->calculate_ecc = tx4925ndfmc_readecc;
-	this->correct_data = nand_correct_data;
-	this->eccmode = NAND_ECC_HW6_512;	
-	this->dev_ready = tx4925ndfmc_device_ready;
-	/* 20 us command delay time */
-	this->chip_delay = 20;		
-        this->read_byte = tx4925ndfmc_nand_read_byte;
-        this->write_byte = tx4925ndfmc_nand_write_byte;
-	this->cmdfunc = tx4925ndfmc_nand_command;
-	this->write_buf = tx4925ndfmc_nand_write_buf;
-	this->read_buf = tx4925ndfmc_nand_read_buf;
-	this->verify_buf = tx4925ndfmc_nand_verify_buf;
-
-	/* Scan to find existance of the device */
-	if (nand_scan (tx4925ndfmc_mtd, 1)) {
-		err = -ENXIO;
-		goto out_ior;
-	}
-
-	/* Register the partitions */
-#ifdef CONFIG_MTD_CMDLINE_PARTS
-        {
-                int mtd_parts_nb = 0;
-                struct mtd_partition *mtd_parts = 0;
-                mtd_parts_nb = parse_cmdline_partitions(tx4925ndfmc_mtd, &mtd_parts, "tx4925ndfmc");
-                if (mtd_parts_nb > 0)
-                        add_mtd_partitions(tx4925ndfmc_mtd, mtd_parts, mtd_parts_nb);
-                else
-                        add_mtd_device(tx4925ndfmc_mtd);
-        }
-#else /* ifdef CONFIG_MTD_CMDLINE_PARTS */
-	switch(tx4925ndfmc_mtd->size){
-		case 0x01000000: add_mtd_partitions(tx4925ndfmc_mtd, partition_info16k, NUM_PARTITIONS16K); break;
-		case 0x02000000: add_mtd_partitions(tx4925ndfmc_mtd, partition_info32k, NUM_PARTITIONS32K); break;
-		case 0x04000000: add_mtd_partitions(tx4925ndfmc_mtd, partition_info64k, NUM_PARTITIONS64K); break; 
-		case 0x08000000: add_mtd_partitions(tx4925ndfmc_mtd, partition_info128k, NUM_PARTITIONS128K); break; 
-		default: {
-			printk ("Unsupported SmartMedia device\n"); 
-			err = -ENXIO;
-			goto out_ior;
-		}
-	}
-#endif /* ifdef CONFIG_MTD_CMDLINE_PARTS */
-	goto out;
-
-out_ior:
-out:
-	return err;
-}
-
-module_init(tx4925ndfmc_init);
-
-/*
- * Clean up routine
- */
-#ifdef MODULE
-static void __exit tx4925ndfmc_cleanup (void)
-{
-	/* Release resources, unregister device */
-	nand_release (tx4925ndfmc_mtd);
-
-	/* Free the MTD device structure */
-	kfree (tx4925ndfmc_mtd);
-}
-module_exit(tx4925ndfmc_cleanup);
-#endif
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Alice Hennessy <ahennessy@mvista.com>");
-MODULE_DESCRIPTION("Glue layer for SmartMediaCard on Toshiba RBTX4925");

drivers/mtd/nand/tx4938ndfmc.c

@@ -1,406 +0,0 @@
-/*
- * drivers/mtd/nand/tx4938ndfmc.c
- *
- *  Overview:
- *   This is a device driver for the NAND flash device connected to
- *   TX4938 internal NAND Memory Controller.
- *   TX4938 NDFMC is almost same as TX4925 NDFMC, but register size are 64 bit.
- *
- * Author: source@mvista.com
- *
- * Based on spia.c by Steven J. Hill
- *
- * $Id: tx4938ndfmc.c,v 1.4 2004/10/05 13:50:20 gleixner Exp $
- *
- * Copyright (C) 2000-2001 Toshiba Corporation 
- *
- * 2003 (c) MontaVista Software, Inc. This file is licensed under the
- * terms of the GNU General Public License version 2. This program is
- * licensed "as is" without any warranty of any kind, whether express
- * or implied.
- */
-#include <linux/config.h>
-#include <linux/slab.h>
-#include <linux/init.h>
-#include <linux/module.h>
-#include <linux/mtd/mtd.h>
-#include <linux/mtd/nand.h>
-#include <linux/mtd/nand_ecc.h>
-#include <linux/mtd/partitions.h>
-#include <asm/io.h>
-#include <asm/bootinfo.h>
-#include <linux/delay.h>
-#include <asm/tx4938/rbtx4938.h>
-
-extern struct nand_oobinfo jffs2_oobinfo;
-
-/*
- * MTD structure for TX4938 NDFMC
- */
-static struct mtd_info *tx4938ndfmc_mtd;
-
-/*
- * Define partitions for flash device
- */
-#define flush_wb()	(void)tx4938_ndfmcptr->mcr;
-
-#define NUM_PARTITIONS  	3
-#define NUMBER_OF_CIS_BLOCKS	24
-#define SIZE_OF_BLOCK		0x00004000
-#define NUMBER_OF_BLOCK_PER_ZONE 1024
-#define SIZE_OF_ZONE		(NUMBER_OF_BLOCK_PER_ZONE * SIZE_OF_BLOCK)
-#ifndef CONFIG_MTD_CMDLINE_PARTS
-/*
- * You can use the following sample of MTD partitions 
- * on the NAND Flash Memory 32MB or more.
- *
- * The following figure shows the image of the sample partition on
- * the 32MB NAND Flash Memory. 
- *
- *   Block No.
- *    0 +-----------------------------+ ------
- *      |             CIS             |   ^
- *   24 +-----------------------------+   |
- *      |         kernel image        |   | Zone 0
- *      |                             |   |
- *      +-----------------------------+   |
- * 1023 |         unused area         |   v
- *      +-----------------------------+ ------
- * 1024 |            JFFS2            |   ^
- *      |                             |   |
- *      |                             |   | Zone 1
- *      |                             |   |
- *      |                             |   |
- *      |                             |   v
- * 2047 +-----------------------------+ ------
- *
- */
-static struct mtd_partition partition_info[NUM_PARTITIONS] = {
-	{
-		.name = "RBTX4938 CIS Area",
- 		.offset =  0,
- 		.size =    (NUMBER_OF_CIS_BLOCKS * SIZE_OF_BLOCK),
- 		.mask_flags  = MTD_WRITEABLE	/* This partition is NOT writable */
- 	},
- 	{
- 		.name = "RBTX4938 kernel image",
- 		.offset =  MTDPART_OFS_APPEND,
- 		.size =    8 * 0x00100000,	/* 8MB (Depends on size of kernel image) */
- 		.mask_flags  = MTD_WRITEABLE	/* This partition is NOT writable */
- 	},
- 	{
- 		.name = "Root FS (JFFS2)",
- 		.offset =  (0 + SIZE_OF_ZONE),    /* start address of next zone */
- 		.size =    MTDPART_SIZ_FULL
- 	},
-};
-#endif
-
-static void tx4938ndfmc_hwcontrol(struct mtd_info *mtd, int cmd)
-{
-	switch (cmd) {
-		case NAND_CTL_SETCLE:
-			tx4938_ndfmcptr->mcr |= TX4938_NDFMCR_CLE;
-			break;
-		case NAND_CTL_CLRCLE:
-			tx4938_ndfmcptr->mcr &= ~TX4938_NDFMCR_CLE;
-			break;
-		case NAND_CTL_SETALE:
-			tx4938_ndfmcptr->mcr |= TX4938_NDFMCR_ALE;
-			break;
-		case NAND_CTL_CLRALE:
-			tx4938_ndfmcptr->mcr &= ~TX4938_NDFMCR_ALE;
-			break;
-		/* TX4938_NDFMCR_CE bit is 0:high 1:low */
-		case NAND_CTL_SETNCE:
-			tx4938_ndfmcptr->mcr |= TX4938_NDFMCR_CE;
-			break;
-		case NAND_CTL_CLRNCE:
-			tx4938_ndfmcptr->mcr &= ~TX4938_NDFMCR_CE;
-			break;
-		case NAND_CTL_SETWP:
-			tx4938_ndfmcptr->mcr |= TX4938_NDFMCR_WE;
-			break;
-		case NAND_CTL_CLRWP:
-			tx4938_ndfmcptr->mcr &= ~TX4938_NDFMCR_WE;
-			break;
-	}
-}
-static int tx4938ndfmc_dev_ready(struct mtd_info *mtd)
-{
-	flush_wb();
-	return !(tx4938_ndfmcptr->sr & TX4938_NDFSR_BUSY);
-}
-static void tx4938ndfmc_calculate_ecc(struct mtd_info *mtd, const u_char *dat, u_char *ecc_code)
-{
-	u32 mcr = tx4938_ndfmcptr->mcr;
-	mcr &= ~TX4938_NDFMCR_ECC_ALL;
-	tx4938_ndfmcptr->mcr = mcr | TX4938_NDFMCR_ECC_OFF;
-	tx4938_ndfmcptr->mcr = mcr | TX4938_NDFMCR_ECC_READ;
-	ecc_code[1] = tx4938_ndfmcptr->dtr;
-	ecc_code[0] = tx4938_ndfmcptr->dtr;
-	ecc_code[2] = tx4938_ndfmcptr->dtr;
-	tx4938_ndfmcptr->mcr = mcr | TX4938_NDFMCR_ECC_OFF;
-}
-static void tx4938ndfmc_enable_hwecc(struct mtd_info *mtd, int mode)
-{
-	u32 mcr = tx4938_ndfmcptr->mcr;
-	mcr &= ~TX4938_NDFMCR_ECC_ALL;
-	tx4938_ndfmcptr->mcr = mcr | TX4938_NDFMCR_ECC_RESET;
-	tx4938_ndfmcptr->mcr = mcr | TX4938_NDFMCR_ECC_OFF;
-	tx4938_ndfmcptr->mcr = mcr | TX4938_NDFMCR_ECC_ON;
-}
-
-static u_char tx4938ndfmc_nand_read_byte(struct mtd_info *mtd)
-{
-	struct nand_chip *this = mtd->priv;
-	return tx4938_read_nfmc(this->IO_ADDR_R);
-}
-
-static void tx4938ndfmc_nand_write_byte(struct mtd_info *mtd, u_char byte)
-{
-	struct nand_chip *this = mtd->priv;
-	tx4938_write_nfmc(byte, this->IO_ADDR_W);
-}
-
-static void tx4938ndfmc_nand_write_buf(struct mtd_info *mtd, const u_char *buf, int len)
-{
-	int i;
-	struct nand_chip *this = mtd->priv;
-
-	for (i=0; i<len; i++)
-		tx4938_write_nfmc(buf[i], this->IO_ADDR_W);
-}
-
-static void tx4938ndfmc_nand_read_buf(struct mtd_info *mtd, u_char *buf, int len)
-{
-	int i;
-	struct nand_chip *this = mtd->priv;
-
-	for (i=0; i<len; i++)
-		buf[i] = tx4938_read_nfmc(this->IO_ADDR_R);
-}
-
-static int tx4938ndfmc_nand_verify_buf(struct mtd_info *mtd, const u_char *buf, int len)
-{
-	int i;
-	struct nand_chip *this = mtd->priv;
-
-	for (i=0; i<len; i++)
-		if (buf[i] != tx4938_read_nfmc(this->IO_ADDR_R))
-			return -EFAULT;
-
-	return 0;
-}
-
-/*
- * Send command to NAND device
- */
-static void tx4938ndfmc_nand_command (struct mtd_info *mtd, unsigned command, int column, int page_addr)
-{
-	register struct nand_chip *this = mtd->priv;
-
-	/* Begin command latch cycle */
-	this->hwcontrol(mtd, NAND_CTL_SETCLE);
-	/*
-	 * 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;
-		}
-		this->write_byte(mtd, readcmd);
-	}
-	this->write_byte(mtd, command);
-
-	/* Set ALE and clear CLE to start address cycle */
-	this->hwcontrol(mtd, NAND_CTL_CLRCLE);
-
-	if (column != -1 || page_addr != -1) {
-		this->hwcontrol(mtd, NAND_CTL_SETALE);
-
-		/* Serially input address */
-		if (column != -1)
-			this->write_byte(mtd, column);
-		if (page_addr != -1) {
-			this->write_byte(mtd, (unsigned char) (page_addr & 0xff));
-			this->write_byte(mtd, (unsigned char) ((page_addr >> 8) & 0xff));
-			/* One more address cycle for higher density devices */
-			if (mtd->size & 0x0c000000) 
-				this->write_byte(mtd, (unsigned char) ((page_addr >> 16) & 0x0f));
-		}
-		/* Latch in address */
-		this->hwcontrol(mtd, NAND_CTL_CLRALE);
-	}
-	
-	/* 
-	 * program and erase have their own busy handlers 
-	 * status and sequential in needs no delay
-	*/
-	switch (command) {
-			
-	case NAND_CMD_PAGEPROG:
-		/* Turn off WE */
-		this->hwcontrol (mtd, NAND_CTL_CLRWP);
-                return;
-
-	case NAND_CMD_SEQIN:
-		/* Turn on WE */
-		this->hwcontrol (mtd, NAND_CTL_SETWP);
-                return;
-
-	case NAND_CMD_ERASE1:
-	case NAND_CMD_ERASE2:
-	case NAND_CMD_STATUS:
-		return;
-
-	case NAND_CMD_RESET:
-		if (this->dev_ready)	
-			break;
-		this->hwcontrol(mtd, NAND_CTL_SETCLE);
-		this->write_byte(mtd, NAND_CMD_STATUS);
-		this->hwcontrol(mtd, NAND_CTL_CLRCLE);
-		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;
-		}	
-	}
-	
-	/* wait until command is processed */
-	while (!this->dev_ready(mtd));
-}
-
-#ifdef CONFIG_MTD_CMDLINE_PARTS
-extern int parse_cmdline_partitions(struct mtd_info *master, struct mtd_partition **pparts, char *);
-#endif
-/*
- * Main initialization routine
- */
-int __init tx4938ndfmc_init (void)
-{
-	struct nand_chip *this;
-	int bsprt = 0, hold = 0xf, spw = 0xf;
-	int protected = 0;
-
-	if ((*rbtx4938_piosel_ptr & 0x0c) != 0x08) {
-		printk("TX4938 NDFMC: disabled by IOC PIOSEL\n");
-		return -ENODEV;
-	}
-	bsprt = 1;
-	hold = 2;
-	spw = 9 - 1;	/* 8 GBUSCLK = 80ns (@ GBUSCLK 100MHz) */
-
-	if ((tx4938_ccfgptr->pcfg &
-	     (TX4938_PCFG_ATA_SEL|TX4938_PCFG_ISA_SEL|TX4938_PCFG_NDF_SEL))
-	    != TX4938_PCFG_NDF_SEL) {
-		printk("TX4938 NDFMC: disabled by PCFG.\n");
-		return -ENODEV;
-	}
-
-	/* reset NDFMC */
-	tx4938_ndfmcptr->rstr |= TX4938_NDFRSTR_RST;
-	while (tx4938_ndfmcptr->rstr & TX4938_NDFRSTR_RST)
-		;
-	/* setup BusSeparete, Hold Time, Strobe Pulse Width */
-	tx4938_ndfmcptr->mcr = bsprt ? TX4938_NDFMCR_BSPRT : 0;
-	tx4938_ndfmcptr->spr = hold << 4 | spw;
-
-	/* Allocate memory for MTD device structure and private data */
-	tx4938ndfmc_mtd = kmalloc (sizeof(struct mtd_info) + sizeof (struct nand_chip),
-				      GFP_KERNEL);
-	if (!tx4938ndfmc_mtd) {
-		printk ("Unable to allocate TX4938 NDFMC MTD device structure.\n");
-		return -ENOMEM;
-	}
-
-	/* Get pointer to private data */
-	this = (struct nand_chip *) (&tx4938ndfmc_mtd[1]);
-
-	/* Initialize structures */
-	memset((char *) tx4938ndfmc_mtd, 0, sizeof(struct mtd_info));
-	memset((char *) this, 0, sizeof(struct nand_chip));
-
-	/* Link the private data with the MTD structure */
-	tx4938ndfmc_mtd->priv = this;
-
-	/* Set address of NAND IO lines */
-	this->IO_ADDR_R = (unsigned long)&tx4938_ndfmcptr->dtr;
-	this->IO_ADDR_W = (unsigned long)&tx4938_ndfmcptr->dtr;
-	this->hwcontrol = tx4938ndfmc_hwcontrol;
-	this->dev_ready = tx4938ndfmc_dev_ready;
-	this->calculate_ecc = tx4938ndfmc_calculate_ecc;
-	this->correct_data = nand_correct_data;
-	this->enable_hwecc = tx4938ndfmc_enable_hwecc;
-	this->eccmode = NAND_ECC_HW3_256;
-	this->chip_delay = 100;
-	this->read_byte = tx4938ndfmc_nand_read_byte;
-	this->write_byte = tx4938ndfmc_nand_write_byte;
-	this->cmdfunc = tx4938ndfmc_nand_command;
-	this->write_buf = tx4938ndfmc_nand_write_buf;
-	this->read_buf = tx4938ndfmc_nand_read_buf;
-	this->verify_buf = tx4938ndfmc_nand_verify_buf;
-
-	/* Scan to find existance of the device */
-	if (nand_scan (tx4938ndfmc_mtd, 1)) {
-		kfree (tx4938ndfmc_mtd);
-		return -ENXIO;
-	}
-
-	if (protected) {
-		printk(KERN_INFO "TX4938 NDFMC: write protected.\n");
-		tx4938ndfmc_mtd->flags &= ~(MTD_WRITEABLE | MTD_ERASEABLE);
-	}
-
-#ifdef CONFIG_MTD_CMDLINE_PARTS
-	{
-		int mtd_parts_nb = 0;
-		struct mtd_partition *mtd_parts = 0;
-		mtd_parts_nb = parse_cmdline_partitions(tx4938ndfmc_mtd, &mtd_parts, "tx4938ndfmc");
-		if (mtd_parts_nb > 0)
-			add_mtd_partitions(tx4938ndfmc_mtd, mtd_parts, mtd_parts_nb);
-		else
-			add_mtd_device(tx4938ndfmc_mtd);
-	}
-#else
-	add_mtd_partitions(tx4938ndfmc_mtd, partition_info, NUM_PARTITIONS );
-#endif
-
-	return 0;
-}
-module_init(tx4938ndfmc_init);
-
-/*
- * Clean up routine
- */
-static void __exit tx4938ndfmc_cleanup (void)
-{
-	/* Release resources, unregister device */
-	nand_release (tx4938ndfmc_mtd);
-
-	/* Free the MTD device structure */
-	kfree (tx4938ndfmc_mtd);
-}
-module_exit(tx4938ndfmc_cleanup);
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Alice Hennessy <ahennessy@mvista.com>");
-MODULE_DESCRIPTION("Board-specific glue layer for NAND flash on TX4938 NDFMC");