MTD: NAND flash driver updates.

 - Use new RS library for ECC
 - Add support for new NAND flash chips
 - New board support:
   - iPAQ H1910
   - Renesas AG-AND devel board
   - Simtec S3C210 
 - Support for shared controllers on multiple chips.
Signed-Off-By: Thomas Gleixner <tglx@linutronix.de>
Signed-Off-By: David Woodhouse <dwmw2@infradead.org>

drivers/mtd/nand/Kconfig

 # drivers/mtd/nand/Kconfig
-# $Id: Kconfig,v 1.17 2004/08/10 14:24:07 dwmw2 Exp $
+# $Id: Kconfig,v 1.22 2004/10/05 22:11:46 gleixner Exp $
 
 menu "NAND Flash Device Drivers"
 	depends on MTD!=n
@@ -36,6 +36,12 @@ config MTD_NAND_EDB7312
 	  This enables the driver for the Cirrus Logic EBD7312 evaluation 
 	  board to access the onboard NAND Flash.
 
+config MTD_NAND_H1900
+	tristate "iPAQ H1900 flash"
+	depends on ARM && MTD_NAND && ARCH_PXA && MTD_PARTITIONS
+	help
+	  This enables the driver for the iPAQ h1900 flash.
+
 config MTD_NAND_SPIA
 	tristate "NAND Flash device on SPIA board"
 	depends on ARM && ARCH_P720T && MTD_NAND
@@ -74,15 +80,54 @@ config MTD_NAND_AU1550
 	  This enables the driver for the NAND flash controller on the
 	  AMD/Alchemy 1550 SOC.
 
+config MTD_NAND_RTC_FROM4
+	tristate "Renesas Flash ROM 4-slot interface board (FROM_BOARD4)"
+	depends on MTD_NAND && SH_SOLUTION_ENGINE
+	select REED_SOLOMON
+	select REED_SOLOMON_DEC8
+	help
+	  This enables the driver for the Renesas Technology AG-AND 
+	  flash interface board (FROM_BOARD4)
+
 config MTD_NAND_PPCHAMELEONEVB
 	tristate "NAND Flash device on PPChameleonEVB board"
 	depends on PPCHAMELEONEVB && MTD_NAND
 	help
-	  This enables the NAND flash driver on the PPChameleon EVB Board.	
+	  This enables the NAND flash driver on the PPChameleon EVB Board.
+
+config MTD_NAND_S3C2410
+	tristate "NAND Flash support for S3C2410 SoC"
+	depends on ARCH_S3C2410 && MTD_NAND
+	help
+	  This enables the NAND flash controller on the S3C2410.
+
+	  No board specfic support is done by this driver, each board
+	  must advertise a platform_device for the driver to attach. 
+
+config MTD_NAND_S3C2410_DEBUG
+	bool "S3C2410 NAND driver debug"
+	depends on MTD_NAND_S3C2410
+	help
+	  Enable debugging of the S3C2410 NAND driver
+
+config MTD_NAND_S3C2410_HWECC
+	bool "S3C2410 NAND Hardware ECC"
+	depends on MTD_NAND_S3C2410
+	help
+	  Enable the use of the S3C2410's internal ECC generator when
+	  using NAND. Early versions of the chip have had problems with
+	  incorrect ECC generation, and if using these, the default of
+	  software ECC is preferable.
+
+	  If you lay down a device with the hardware ECC, then you will
+	  currently not be able to switch to software, as there is no
+	  implementation for ECC method used by the S3C2410
 
 config MTD_NAND_DISKONCHIP
 	tristate "DiskOnChip 2000, Millennium and Millennium Plus (NAND reimplementation) (EXPERIMENTAL)"
 	depends on MTD_NAND && EXPERIMENTAL
+	select REED_SOLOMON
+	select REED_SOLOMON_DEC16
 	help
 	  This is a reimplementation of M-Systems DiskOnChip 2000,
 	  Millennium and Millennium Plus as a standard NAND device driver,

drivers/mtd/nand/Makefile

 #
 # linux/drivers/nand/Makefile
 #
-# $Id: Makefile.common,v 1.9 2004/07/12 16:07:31 dwmw2 Exp $
+# $Id: Makefile.common,v 1.13 2004/09/28 22:04:23 bjd Exp $
 
 obj-$(CONFIG_MTD_NAND)			+= nand.o nand_ecc.o
 obj-$(CONFIG_MTD_NAND_IDS)		+= nand_ids.o
@@ -14,6 +14,9 @@ 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-$(CONFIG_MTD_NAND_S3C2410)		+= s3c2410.o
 obj-$(CONFIG_MTD_NAND_DISKONCHIP)	+= diskonchip.o
+obj-$(CONFIG_MTD_NAND_H1900)		+= h1910.o
+obj-$(CONFIG_MTD_NAND_RTC_FROM4)	+= rtc_from4.o
 
 nand-objs = nand_base.o nand_bbt.o

drivers/mtd/nand/autcpu12.c

@@ -6,7 +6,7 @@
  *  Derived from drivers/mtd/spia.c
  * 	 Copyright (C) 2000 Steven J. Hill (sjhill@realitydiluted.com)
  * 
- * $Id: autcpu12.c,v 1.20 2004/07/20 02:44:26 dwmw2 Exp $
+ * $Id: autcpu12.c,v 1.21 2004/09/16 23:27:14 gleixner 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
@@ -48,7 +48,7 @@ static int autcpu12_io_base = CS89712_VIRT_BASE;
 static int autcpu12_fio_pbase = AUTCPU12_PHYS_SMC;
 static int autcpu12_fio_ctrl = AUTCPU12_SMC_SELECT_OFFSET;
 static int autcpu12_pedr = AUTCPU12_SMC_PORT_OFFSET;
-static int autcpu12_fio_base;
+static void __iomem * autcpu12_fio_base;
 
 #ifdef MODULE
 MODULE_PARM(autcpu12_fio_pbase, "i");
@@ -150,7 +150,7 @@ int __init autcpu12_init (void)
 	}
 
 	/* map physical adress */
-	autcpu12_fio_base=(unsigned long)ioremap(autcpu12_fio_pbase,SZ_1K);
+	autcpu12_fio_base=(void __iomem *)ioremap(autcpu12_fio_pbase,SZ_1K);
 	if(!autcpu12_fio_base){
 		printk("Ioremap autcpu12 SmartMedia Card failed\n");
 		err = -EIO;

drivers/mtd/nand/edb7312.c

@@ -6,7 +6,7 @@
  *  Derived from drivers/mtd/nand/autcpu12.c
  *       Copyright (c) 2001 Thomas Gleixner (gleixner@autronix.de)
  *
- * $Id: edb7312.c,v 1.8 2004/07/12 15:03:26 dwmw2 Exp $
+ * $Id: edb7312.c,v 1.10 2004/10/05 13:50:20 gleixner 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
@@ -53,9 +53,9 @@ static struct mtd_info *ep7312_mtd = NULL;
  * Module stuff
  */
 
-static int ep7312_fio_pbase = EP7312_FIO_PBASE;
-static int ep7312_pxdr = EP7312_PXDR;
-static int ep7312_pxddr = EP7312_PXDDR;
+static unsigned long ep7312_fio_pbase = EP7312_FIO_PBASE;
+static void __iomem * ep7312_pxdr = (void __iomem *) EP7312_PXDR;
+static void __iomem * ep7312_pxddr = (void __iomem *) EP7312_PXDDR;
 
 #ifdef MODULE
 MODULE_PARM(ep7312_fio_pbase, "i");
@@ -131,7 +131,7 @@ static int __init ep7312_init (void)
 	const char *part_type = 0;
 	int mtd_parts_nb = 0;
 	struct mtd_partition *mtd_parts = 0;
-	int ep7312_fio_base;
+	void __iomem * ep7312_fio_base;
 	
 	/* Allocate memory for MTD device structure and private data */
 	ep7312_mtd = kmalloc(sizeof(struct mtd_info) + 
@@ -143,7 +143,7 @@ static int __init ep7312_init (void)
 	}
 	
 	/* map physical adress */
-	ep7312_fio_base = (unsigned long)ioremap(ep7312_fio_pbase, SZ_1K);
+	ep7312_fio_base = (void __iomem *)ioremap(ep7312_fio_pbase, SZ_1K);
 	if(!ep7312_fio_base) {
 		printk("ioremap EDB7312 NAND flash failed\n");
 		kfree(ep7312_mtd);
@@ -181,16 +181,7 @@ static int __init ep7312_init (void)
 		return -ENXIO;
 	}
 	
-	/* Allocate memory for internal data buffer */
-	this->data_buf = kmalloc (sizeof(u_char) * (ep7312_mtd->oobblock + ep7312_mtd->oobsize), GFP_KERNEL);
-	if (!this->data_buf) {
-		printk("Unable to allocate NAND data buffer for EDB7312.\n");
-		iounmap((void *)ep7312_fio_base);
-		kfree (ep7312_mtd);
-		return -ENOMEM;
-	}
-	
-#ifdef CONFIG_PARTITIONS
+#ifdef CONFIG_MTD_PARTITIONS
 	ep7312_mtd->name = "edb7312-nand";
 	mtd_parts_nb = parse_mtd_partitions(ep7312_mtd, part_probes,
 					    &mtd_parts, 0);
@@ -221,8 +212,8 @@ static void __exit ep7312_cleanup (void)
 {
 	struct nand_chip *this = (struct nand_chip *) &ep7312_mtd[1];
 	
-	/* Unregister the device */
-	del_mtd_device (ep7312_mtd);
+	/* Release resources, unregister device */
+	nand_release (ap7312_mtd);
 	
 	/* Free internal data buffer */
 	kfree (this->data_buf);

drivers/mtd/nand/h1910.c

+/*
+ *  drivers/mtd/nand/h1910.c
+ *
+ *  Copyright (C) 2003 Joshua Wise (joshua@joshuawise.com)
+ *
+ *  Derived from drivers/mtd/nand/edb7312.c
+ *       Copyright (C) 2002 Marius Grger (mag@sysgo.de)
+ *       Copyright (c) 2001 Thomas Gleixner (gleixner@autronix.de)
+ *
+ * $Id: h1910.c,v 1.4 2004/10/05 13:50:20 gleixner 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.
+ *
+ *  Overview:
+ *   This is a device driver for the NAND flash device found on the
+ *   iPAQ h1910 board which utilizes the Samsung K9F2808 part. This is
+ *   a 128Mibit (16MiB x 8 bits) NAND flash device.
+ */
+
+#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 <asm/io.h>
+#include <asm/arch/hardware.h> /* for CLPS7111_VIRT_BASE */
+#include <asm/sizes.h>
+#include <asm/arch/h1900-gpio.h>
+#include <asm/arch/ipaq.h>
+
+/*
+ * MTD structure for EDB7312 board
+ */
+static struct mtd_info *h1910_nand_mtd = NULL;
+
+/*
+ * Module stuff
+ */
+
+#ifdef CONFIG_MTD_PARTITIONS
+/*
+ * Define static partitions for flash device
+ */
+static struct mtd_partition partition_info[] = {
+	{ name: "h1910 NAND Flash",
+		  offset: 0,
+		  size: 16*1024*1024 }
+};
+#define NUM_PARTITIONS 1
+
+#endif
+
+
+/* 
+ *	hardware specific access to control-lines
+ */
+static void h1910_hwcontrol(struct mtd_info *mtd, int cmd) 
+{
+	struct nand_chip* this = (struct nand_chip *) (mtd->priv);
+	
+	switch(cmd) {
+		
+	case NAND_CTL_SETCLE: 
+		this->IO_ADDR_R |= (1 << 2);
+		this->IO_ADDR_W |= (1 << 2);
+		break;
+	case NAND_CTL_CLRCLE: 
+		this->IO_ADDR_R &= ~(1 << 2);
+		this->IO_ADDR_W &= ~(1 << 2);
+		break;
+		
+	case NAND_CTL_SETALE:
+		this->IO_ADDR_R |= (1 << 3);
+		this->IO_ADDR_W |= (1 << 3);
+		break;
+	case NAND_CTL_CLRALE:
+		this->IO_ADDR_R &= ~(1 << 3);
+		this->IO_ADDR_W &= ~(1 << 3);
+		break;
+		
+	case NAND_CTL_SETNCE:
+		break;
+	case NAND_CTL_CLRNCE:
+		break;
+	}
+}
+
+/*
+ *	read device ready pin
+ */
+#if 0
+static int h1910_device_ready(struct mtd_info *mtd)
+{
+	return (GPLR(55) & GPIO_bit(55));
+}
+#endif
+
+/*
+ * Main initialization routine
+ */
+static int __init h1910_init (void)
+{
+	struct nand_chip *this;
+	const char *part_type = 0;
+	int mtd_parts_nb = 0;
+	struct mtd_partition *mtd_parts = 0;
+	void __iomem *nandaddr;
+	
+	if (!machine_is_h1900())
+		return -ENODEV;
+		
+	nandaddr = (void __iomem *)__ioremap(0x08000000, 0x1000, 0, 1);
+	if (!nandaddr) {
+		printk("Failed to ioremap nand flash.\n");
+		return -ENOMEM;
+	}
+	
+	/* Allocate memory for MTD device structure and private data */
+	h1910_nand_mtd = kmalloc(sizeof(struct mtd_info) + 
+			     sizeof(struct nand_chip),
+			     GFP_KERNEL);
+	if (!h1910_nand_mtd) {
+		printk("Unable to allocate h1910 NAND MTD device structure.\n");
+		iounmap ((void *) nandaddr);
+		return -ENOMEM;
+	}
+	
+	/* Get pointer to private data */
+	this = (struct nand_chip *) (&h1910_nand_mtd[1]);
+	
+	/* Initialize structures */
+	memset((char *) h1910_nand_mtd, 0, sizeof(struct mtd_info));
+	memset((char *) this, 0, sizeof(struct nand_chip));
+	
+	/* Link the private data with the MTD structure */
+	h1910_nand_mtd->priv = this;
+	
+	/*
+	 * Enable VPEN
+	 */
+	GPSR(37) = GPIO_bit(37);
+	
+	/* insert callbacks */
+	this->IO_ADDR_R = nandaddr;
+	this->IO_ADDR_W = nandaddr;
+	this->hwcontrol = h1910_hwcontrol;
+	this->dev_ready = NULL;	/* unknown whether that was correct or not so we will just do it like this */
+	/* 15 us command delay time */
+	this->chip_delay = 50;
+	this->eccmode = NAND_ECC_SOFT;
+	this->options = NAND_NO_AUTOINCR;
+	
+	/* Scan to find existence of the device */
+	if (nand_scan (h1910_nand_mtd, 1)) {
+		printk(KERN_NOTICE "No NAND device - returning -ENXIO\n");
+		kfree (h1910_nand_mtd);
+		iounmap ((void *) nandaddr);
+		return -ENXIO;
+	}
+	
+#ifdef CONFIG_MTD_CMDLINE_PARTS
+	mtd_parts_nb = parse_cmdline_partitions(h1910_nand_mtd, &mtd_parts, 
+						"h1910-nand");
+	if (mtd_parts_nb > 0)
+	  part_type = "command line";
+	else
+	  mtd_parts_nb = 0;
+#endif
+	if (mtd_parts_nb == 0)
+	{
+		mtd_parts = partition_info;
+		mtd_parts_nb = NUM_PARTITIONS;
+		part_type = "static";
+	}
+	
+	/* Register the partitions */
+	printk(KERN_NOTICE "Using %s partition definition\n", part_type);
+	add_mtd_partitions(h1910_nand_mtd, mtd_parts, mtd_parts_nb);
+	
+	/* Return happy */
+	return 0;
+}
+module_init(h1910_init);
+
+/*
+ * Clean up routine
+ */
+static void __exit h1910_cleanup (void)
+{
+	struct nand_chip *this = (struct nand_chip *) &h1910_nand_mtd[1];
+	
+	/* Release resources, unregister device */
+	nand_release (h1910_nand_mtd);
+
+	/* Release io resource */
+	iounmap ((void *) this->IO_ADDR_W);
+
+	/* Free the MTD device structure */
+	kfree (h1910_nand_mtd);
+}
+module_exit(h1910_cleanup);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Joshua Wise <joshua at joshuawise dot com>");
+MODULE_DESCRIPTION("NAND flash driver for iPAQ h1910");

drivers/mtd/nand/nand_bbt.c

@@ -6,7 +6,7 @@
  *   
  *  Copyright (C) 2004 Thomas Gleixner (tglx@linutronix.de)
  *
- * $Id: nand_bbt.c,v 1.24 2004/06/28 08:25:35 gleixner Exp $
+ * $Id: nand_bbt.c,v 1.26 2004/10/05 13:50:20 gleixner 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
@@ -114,6 +114,7 @@ static int check_pattern (uint8_t *buf, int len, int paglen, struct nand_bbt_des
  * @num:	the number of bbt descriptors to read
  * @bits:	number of bits per block
  * @offs:	offset in the memory table
+ * @reserved_block_code:	Pattern to identify reserved blocks
  *
  * Read the bad block table starting from page.
  *
@@ -796,7 +797,7 @@ int nand_scan_bbt (struct mtd_info *mtd, struct nand_bbt_descr *bd)
 
 	len = mtd->size >> (this->bbt_erase_shift + 2);
 	/* Allocate memory (2bit per block) */
-	this->bbt = (uint8_t *) kmalloc (len, GFP_KERNEL);
+	this->bbt = kmalloc (len, GFP_KERNEL);
 	if (!this->bbt) {
 		printk (KERN_ERR "nand_scan_bbt: Out of memory\n");
 		return -ENOMEM;

drivers/mtd/nand/ppchameleonevb.c

@@ -6,7 +6,7 @@
  *  Derived from drivers/mtd/nand/edb7312.c
  *
  *
- * $Id: ppchameleonevb.c,v 1.2 2004/05/05 22:09:54 gleixner Exp $
+ * $Id: ppchameleonevb.c,v 1.4 2004/10/05 13:50:20 gleixner 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
@@ -74,12 +74,6 @@ MODULE_PARM(ppchameleonevb_fio_pbase, "i");
 __setup("ppchameleonevb_fio_pbase=",ppchameleonevb_fio_pbase);
 #endif
 
-/* Internal buffers. Page buffer and oob buffer for one block */
-static u_char data_buf[2048 + 64];
-static u_char oob_buf[64 * 64];
-static u_char data_buf_evb[512 + 16];
-static u_char oob_buf_evb[16 * 32];
-
 #ifdef CONFIG_MTD_PARTITIONS
 /*
  * Define static partitions for flash devices
@@ -196,8 +190,8 @@ static int __init ppchameleonevb_init (void)
 	const char *part_type = 0;
 	int mtd_parts_nb = 0;
 	struct mtd_partition *mtd_parts = 0;
-	int ppchameleon_fio_base;
-	int ppchameleonevb_fio_base;
+	void __iomem *ppchameleon_fio_base;
+	void __iomem *ppchameleonevb_fio_base;
 
 
 	/*********************************
@@ -205,15 +199,14 @@ static int __init ppchameleonevb_init (void)
 	*********************************/
 	/* Allocate memory for MTD device structure and private data */
 	ppchameleon_mtd = kmalloc(sizeof(struct mtd_info) +
-			     sizeof(struct nand_chip),
-			     GFP_KERNEL);
+						      sizeof(struct nand_chip), GFP_KERNEL);
 	if (!ppchameleon_mtd) {
 		printk("Unable to allocate PPChameleon NAND MTD device structure.\n");
 		return -ENOMEM;
 	}
 
 	/* map physical address */
-	ppchameleon_fio_base = (unsigned long)ioremap(ppchameleon_fio_pbase, SZ_4M);
+	ppchameleon_fio_base = (void __iomem *) ioremap(ppchameleon_fio_pbase, SZ_4M);
 	if(!ppchameleon_fio_base) {
 		printk("ioremap PPChameleon NAND flash failed\n");
 		kfree(ppchameleon_mtd);
@@ -264,10 +257,6 @@ static int __init ppchameleonevb_init (void)
 	/* ECC mode */
 	this->eccmode = NAND_ECC_SOFT;
 
-	/* Set internal data buffer */
-	this->data_buf = data_buf;
-	this->oob_buf = oob_buf;
-
 	/* Scan to find existence of the device (it could not be mounted) */
 	if (nand_scan (ppchameleon_mtd, 1)) {
 		iounmap((void *)ppchameleon_fio_base);
@@ -309,15 +298,14 @@ static int __init ppchameleonevb_init (void)
 	****************************/
 	/* Allocate memory for MTD device structure and private data */
 	ppchameleonevb_mtd = kmalloc(sizeof(struct mtd_info) +
-			     sizeof(struct nand_chip),
-			     GFP_KERNEL);
+							 sizeof(struct nand_chip), GFP_KERNEL);
 	if (!ppchameleonevb_mtd) {
 		printk("Unable to allocate PPChameleonEVB NAND MTD device structure.\n");
 		return -ENOMEM;
 	}
 
 	/* map physical address */
-	ppchameleonevb_fio_base = (unsigned long)ioremap(ppchameleonevb_fio_pbase, SZ_4M);
+	ppchameleonevb_fio_base = (void __iomem *)ioremap(ppchameleonevb_fio_pbase, SZ_4M);
 	if(!ppchameleonevb_fio_base) {
 		printk("ioremap PPChameleonEVB NAND flash failed\n");
 		kfree(ppchameleonevb_mtd);
@@ -349,7 +337,8 @@ static int __init ppchameleonevb_init (void)
 	out_be32((volatile unsigned*)GPIO0_TSRH, in_be32((volatile unsigned*)GPIO0_TSRH) & 0xFFFFFFF0);
 	out_be32((volatile unsigned*)GPIO0_TSRL, in_be32((volatile unsigned*)GPIO0_TSRL) & 0x3FFFFFFF);
 	/* enable output driver */
-	out_be32((volatile unsigned*)GPIO0_TCR, in_be32((volatile unsigned*)GPIO0_TCR) | NAND_EVB_nCE_GPIO_PIN | NAND_EVB_CLE_GPIO_PIN | NAND_EVB_ALE_GPIO_PIN);
+	out_be32((volatile unsigned*)GPIO0_TCR, in_be32((volatile unsigned*)GPIO0_TCR) | NAND_EVB_nCE_GPIO_PIN | 
+		 NAND_EVB_CLE_GPIO_PIN | NAND_EVB_ALE_GPIO_PIN);
 #ifdef USE_READY_BUSY_PIN
 	/* three-state select */
 	out_be32((volatile unsigned*)GPIO0_TSRL, in_be32((volatile unsigned*)GPIO0_TSRL) & 0xFFFFFFFC);
@@ -359,7 +348,6 @@ static int __init ppchameleonevb_init (void)
 	out_be32((volatile unsigned*)GPIO0_ISR1L, (in_be32((volatile unsigned*)GPIO0_ISR1L) & 0xFFFFFFFC) | 0x00000001);
 #endif
 
-
 	/* insert callbacks */
 	this->IO_ADDR_R = ppchameleonevb_fio_base;
 	this->IO_ADDR_W = ppchameleonevb_fio_base;
@@ -372,10 +360,6 @@ static int __init ppchameleonevb_init (void)
 	/* ECC mode */
 	this->eccmode = NAND_ECC_SOFT;
 
-	/* Set internal data buffer */
-	this->data_buf = data_buf_evb;
-	this->oob_buf = oob_buf_evb;
-
 	/* Scan to find existence of the device */
 	if (nand_scan (ppchameleonevb_mtd, 1)) {
 		iounmap((void *)ppchameleonevb_fio_base);
@@ -412,15 +396,20 @@ module_init(ppchameleonevb_init);
  */
 static void __exit ppchameleonevb_cleanup (void)
 {
-	struct nand_chip *this = (struct nand_chip *) &ppchameleonevb_mtd[1];
-
-	/* Unregister the device */
-	del_mtd_device (ppchameleonevb_mtd);
+	struct nand_chip *this;
 
-	/* Free internal data buffer */
-	kfree (this->data_buf);
+	/* Release resources, unregister device(s) */
+	nand_release (ppchameleon_mtd);
+	nand_release (ppchameleonevb_mtd);
+	
+	/* Release iomaps */
+	this = (struct nand_chip *) &ppchameleon_mtd[1];
+	iounmap((void *) this->IO_ADDR_R;
+	this = (struct nand_chip *) &ppchameleonevb_mtd[1];
+	iounmap((void *) this->IO_ADDR_R;
 
 	/* Free the MTD device structure */
+	kfree (ppchameleon_mtd);
 	kfree (ppchameleonevb_mtd);
 }
 module_exit(ppchameleonevb_cleanup);

drivers/mtd/nand/spia.c

@@ -8,7 +8,7 @@
  *			to controllines	(due to change in nand.c)
  *			page_cache added
  *
- * $Id: spia.c,v 1.21 2003/07/11 15:12:29 dwmw2 Exp $
+ * $Id: spia.c,v 1.23 2004/10/05 13:50:20 gleixner 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
@@ -132,8 +132,8 @@ int __init spia_init (void)
 	(*(volatile unsigned char *) (spia_io_base + spia_peddr)) = 0x07;
 
 	/* Set address of NAND IO lines */
-	this->IO_ADDR_R = spia_fio_base;
-	this->IO_ADDR_W = spia_fio_base;
+	this->IO_ADDR_R = (void __iomem *) spia_fio_base;
+	this->IO_ADDR_W = (void __iomem *) spia_fio_base;
 	/* Set address of hardware control function */
 	this->hwcontrol = spia_hwcontrol;
 	/* 15 us command delay time */
@@ -145,14 +145,6 @@ int __init spia_init (void)
 		return -ENXIO;
 	}
 
-	/* Allocate memory for internal data buffer */
-	this->data_buf = kmalloc (sizeof(u_char) * (spia_mtd->oobblock + spia_mtd->oobsize), GFP_KERNEL);
-	if (!this->data_buf) {
-		printk ("Unable to allocate NAND data buffer for SPIA.\n");
-		kfree (spia_mtd);
-		return -ENOMEM;
-	}
-
 	/* Register the partitions */
 	add_mtd_partitions(spia_mtd, partition_info, NUM_PARTITIONS);
 
@@ -167,13 +159,8 @@ module_init(spia_init);
 #ifdef MODULE
 static void __exit spia_cleanup (void)
 {
-	struct nand_chip *this = (struct nand_chip *) &spia_mtd[1];
-
-	/* Unregister the device */
-	del_mtd_device (spia_mtd);
-
-	/* Free internal data buffer */
-	kfree (this->data_buf);
+	/* Release resources, unregister device */
+	nand_release (spia_mtd);
 
 	/* Free the MTD device structure */
 	kfree (spia_mtd);

drivers/mtd/nand/toto.c

@@ -15,7 +15,7 @@
  *   This is a device driver for the NAND flash device found on the
  *   TI fido board. It supports 32MiB and 64MiB cards
  *
- * $Id: toto.c,v 1.2 2003/10/21 10:04:58 dwmw2 Exp $
+ * $Id: toto.c,v 1.4 2004/10/05 13:50:20 gleixner Exp $
  */
 
 #include <linux/slab.h>
@@ -37,7 +37,7 @@
  */
 static struct mtd_info *toto_mtd = NULL;
 
-static int toto_io_base = OMAP_FLASH_1_BASE;
+static unsigned long toto_io_base = OMAP_FLASH_1_BASE;
 
 #define CONFIG_NAND_WORKAROUND 1
 
@@ -155,14 +155,6 @@ int __init toto_init (void)
 		goto out_mtd;
 	}
 
-	/* Allocate memory for internal data buffer */
-	this->data_buf = kmalloc (sizeof(u_char) * (toto_mtd->oobblock + toto_mtd->oobsize), GFP_KERNEL);
-	if (!this->data_buf) {
-		printk (KERN_WARNING "Unable to allocate NAND data buffer for toto.\n");
-		err = -ENOMEM;
-		goto out_mtd;
-	}
-
 	/* Register the partitions */
 	switch(toto_mtd->size){
 		case SZ_64M: add_mtd_partitions(toto_mtd, partition_info64M, NUM_PARTITIONS64M); break; 
@@ -194,16 +186,8 @@ module_init(toto_init);
  */
 static void __exit toto_cleanup (void)
 {
-	struct nand_chip *this = (struct nand_chip *) &toto_mtd[1];
-
-	/* Unregister partitions */
-	del_mtd_partitions(toto_mtd);
-	
-	/* Unregister the device */
-	del_mtd_device (toto_mtd);
-
-	/* Free internal data buffers */
-	kfree (this->data_buf);
+	/* Release resources, unregister device */
+	nand_release (toto_mtd);
 
 	/* Free the MTD device structure */
 	kfree (toto_mtd);

drivers/mtd/nand/tx4925ndfmc.c

@@ -11,7 +11,7 @@
  * Derived from drivers/mtd/autcpu12.c
  *       Copyright (c) 2001 Thomas Gleixner (gleixner@autronix.de)
  *
- * $Id: tx4925ndfmc.c,v 1.3 2004/07/20 02:44:26 dwmw2 Exp $
+ * $Id: tx4925ndfmc.c,v 1.5 2004/10/05 13:50:20 gleixner Exp $
  *
  * Copyright (C) 2001 Toshiba Corporation 
  * 
@@ -340,8 +340,8 @@ int __init tx4925ndfmc_init (void)
 	tx4925ndfmc_mtd->priv = this;
 
 	/* Set address of NAND IO lines */
-	this->IO_ADDR_R = (unsigned long)&(tx4925_ndfmcptr->dtr);
-	this->IO_ADDR_W = (unsigned long)&(tx4925_ndfmcptr->dtr);
+	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;
@@ -363,14 +363,6 @@ int __init tx4925ndfmc_init (void)
 		goto out_ior;
 	}
 
-	/* Allocate memory for internal data buffer */
-	this->data_buf = kmalloc (sizeof(u_char) * (tx4925ndfmc_mtd->oobblock + tx4925ndfmc_mtd->oobsize), GFP_KERNEL);
-	if (!this->data_buf) {
-		printk ("Unable to allocate NAND data buffer for RBTX4925.\n");
-		err = -ENOMEM;
-		goto out_ior;
-	}
-
 	/* Register the partitions */
 #ifdef CONFIG_MTD_CMDLINE_PARTS
         {
@@ -391,14 +383,12 @@ int __init tx4925ndfmc_init (void)
 		default: {
 			printk ("Unsupported SmartMedia device\n"); 
 			err = -ENXIO;
-			goto out_buf;
+			goto out_ior;
 		}
 	}
 #endif /* ifdef CONFIG_MTD_CMDLINE_PARTS */
 	goto out;
 
-out_buf:
-	kfree (this->data_buf);    
 out_ior:
 out:
 	return err;
@@ -412,16 +402,8 @@ module_init(tx4925ndfmc_init);
 #ifdef MODULE
 static void __exit tx4925ndfmc_cleanup (void)
 {
-	struct nand_chip *this = (struct nand_chip *) &tx4925ndfmc_mtd[1];
-
-	/* Unregister partitions */
-	del_mtd_partitions(tx4925ndfmc_mtd);
-	
-	/* Unregister the device */
-	del_mtd_device (tx4925ndfmc_mtd);
-
-	/* Free internal data buffers */
-	kfree (this->data_buf);
+	/* Release resources, unregister device */
+	nand_release (tx4925ndfmc_mtd);
 
 	/* Free the MTD device structure */
 	kfree (tx4925ndfmc_mtd);

drivers/mtd/nand/tx4938ndfmc.c

@@ -10,7 +10,7 @@
  *
  * Based on spia.c by Steven J. Hill
  *
- * $Id: tx4938ndfmc.c,v 1.2 2004/03/27 19:55:53 gleixner Exp $
+ * $Id: tx4938ndfmc.c,v 1.4 2004/10/05 13:50:20 gleixner Exp $
  *
  * Copyright (C) 2000-2001 Toshiba Corporation 
  *
@@ -365,14 +365,6 @@ int __init tx4938ndfmc_init (void)
 		return -ENXIO;
 	}
 
-	/* Allocate memory for internal data buffer */
-	this->data_buf = kmalloc (sizeof(u_char) * (tx4938ndfmc_mtd->oobblock + tx4938ndfmc_mtd->oobsize), GFP_KERNEL);
-	if (!this->data_buf) {
-		printk ("Unable to allocate NAND data buffer for TX4938.\n");
-		kfree (tx4938ndfmc_mtd);
-		return -ENOMEM;
-	}
-
 	if (protected) {
 		printk(KERN_INFO "TX4938 NDFMC: write protected.\n");
 		tx4938ndfmc_mtd->flags &= ~(MTD_WRITEABLE | MTD_ERASEABLE);
@@ -401,19 +393,11 @@ module_init(tx4938ndfmc_init);
  */
 static void __exit tx4938ndfmc_cleanup (void)
 {
-	struct nand_chip *this = (struct nand_chip *) tx4938ndfmc_mtd->priv;
-
-	/* Unregister the device */
-#ifdef CONFIG_MTD_CMDLINE_PARTS
-	del_mtd_partitions(tx4938ndfmc_mtd);
-#endif
-	del_mtd_device (tx4938ndfmc_mtd);
+	/* Release resources, unregister device */
+	nand_release (tx4938ndfmc_mtd);
 
 	/* Free the MTD device structure */
 	kfree (tx4938ndfmc_mtd);
-
-	/* Free internal data buffer */
-	kfree (this->data_buf);
 }
 module_exit(tx4938ndfmc_cleanup);
 

include/linux/mtd/nand.h

@@ -5,7 +5,7 @@
  *                     Steven J. Hill <sjhill@realitydiluted.com>
  *		       Thomas Gleixner <tglx@linutronix.de>
  *
- * $Id: nand.h,v 1.63 2004/07/07 16:29:43 gleixner Exp $
+ * $Id: nand.h,v 1.66 2004/10/02 10:07:08 gleixner 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
@@ -212,6 +212,18 @@ typedef enum {
 	FL_CACHEDPRG,
 } nand_state_t;
 
+/* Keep gcc happy */
+struct nand_chip;
+
+/**
+ * struct nand_hw_control - Control structure for hardware controller (e.g ECC generator) shared among independend devices
+ * @lock:               protection lock  
+ * @active:		the mtd device which holds the controller currently
+ */
+struct nand_hw_control {
+	spinlock_t	 lock;
+	struct nand_chip *active;
+};
 
 /**
  * struct nand_chip - NAND Private Flash Chip Data
@@ -265,12 +277,13 @@ typedef enum {
  * @bbt:		[INTERN] bad block table pointer
  * @bbt_td:		[REPLACEABLE] bad block table descriptor for flash lookup
  * @bbt_md:		[REPLACEABLE] bad block table mirror descriptor
+ * @controller:		[OPTIONAL] a pointer to a hardware controller structure which is shared among multiple independend devices
  * @priv:		[OPTIONAL] pointer to private chip date
  */
  
 struct nand_chip {
-	unsigned long 	IO_ADDR_R;
-	unsigned long 	IO_ADDR_W;
+	void  __iomem	*IO_ADDR_R;
+	void  __iomem 	*IO_ADDR_W;
 	
 	u_char		(*read_byte)(struct mtd_info *mtd);
 	void		(*write_byte)(struct mtd_info *mtd, u_char byte);
@@ -317,6 +330,7 @@ struct nand_chip {
 	uint8_t		*bbt;
 	struct nand_bbt_descr	*bbt_td;
 	struct nand_bbt_descr	*bbt_md;
+	struct nand_hw_control  *controller;
 	void		*priv;
 };