/* *  drivers/mtd/autcpu12.c * *  Copyright (c) 2002 Thomas Gleixner <tgxl@linutronix.de> * *  Derived from drivers/mtd/spia.c * 	 Copyright (C) 2000 Steven J. Hill (sjhill@realitydiluted.com) *  * $Id: autcpu12.c,v 1.2 2007/09/21 03:09:24 quy 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 *   autronix autcpu12 board, which is a SmartMediaCard. It supports  *   16MiB, 32MiB and 64MiB cards. * * *	02-12-2002 TG	Cleanup of module params * *	02-20-2002 TG	adjusted for different rd/wr adress support *			added support for read device ready/busy line *			added page_cache * *	10-06-2002 TG	128K card support added */#include <linux/version.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/partitions.h>#include <asm/io.h>#include <asm/arch/hardware.h>#include <asm/sizes.h>#include <asm/arch/autcpu12.h>/* * MTD structure for AUTCPU12 board */static struct mtd_info *autcpu12_mtd = NULL;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;#ifdef MODULEMODULE_PARM(autcpu12_fio_pbase, "i");MODULE_PARM(autcpu12_fio_ctrl, "i");MODULE_PARM(autcpu12_pedr, "i");__setup("autcpu12_fio_pbase=",autcpu12_fio_pbase);__setup("autcpu12_fio_ctrl=",autcpu12_fio_ctrl);__setup("autcpu12_pedr=",autcpu12_pedr);#endif/* * Define partitions for flash devices */static struct mtd_partition partition_info16k[] = {	{ .name		= "AUTCPU12 flash partition 1",	  .offset	= 0,	  .size		= 8 * SZ_1M },	{ .name		= "AUTCPU12 flash partition 2",	  .offset	= 8 * SZ_1M,	  .size		= 8 * SZ_1M },};static struct mtd_partition partition_info32k[] = {	{ .name		= "AUTCPU12 flash partition 1",	  .offset	= 0,	  .size		= 8 * SZ_1M },	{ .name		= "AUTCPU12 flash partition 2",	  .offset	= 8 * SZ_1M,	  .size		= 24 * SZ_1M },};static struct mtd_partition partition_info64k[] = {	{ .name		= "AUTCPU12 flash partition 1",	  .offset	= 0,	  .size		= 16 * SZ_1M },	{ .name		= "AUTCPU12 flash partition 2",	  .offset	= 16 * SZ_1M,	  .size		= 48 * SZ_1M },};static struct mtd_partition partition_info128k[] = {	{ .name		= "AUTCPU12 flash partition 1",	  .offset	= 0,	  .size		= 16 * SZ_1M },	{ .name		= "AUTCPU12 flash partition 2",	  .offset	= 16 * SZ_1M,	  .size		= 112 * SZ_1M },};#define NUM_PARTITIONS16K 2#define NUM_PARTITIONS32K 2#define NUM_PARTITIONS64K 2#define NUM_PARTITIONS128K 2/*  *	hardware specific access to control-lines*/static void autcpu12_hwcontrol(struct mtd_info *mtd, int cmd){	switch(cmd){		case NAND_CTL_SETCLE: (*(volatile unsigned char *) (autcpu12_io_base + autcpu12_pedr)) |=  AUTCPU12_SMC_CLE; break;		case NAND_CTL_CLRCLE: (*(volatile unsigned char *) (autcpu12_io_base + autcpu12_pedr)) &= ~AUTCPU12_SMC_CLE; break;		case NAND_CTL_SETALE: (*(volatile unsigned char *) (autcpu12_io_base + autcpu12_pedr)) |=  AUTCPU12_SMC_ALE; break;		case NAND_CTL_CLRALE: (*(volatile unsigned char *) (autcpu12_io_base + autcpu12_pedr)) &= ~AUTCPU12_SMC_ALE; break;		case NAND_CTL_SETNCE: (*(volatile unsigned char *) (autcpu12_fio_base + autcpu12_fio_ctrl)) = 0x01; break;		case NAND_CTL_CLRNCE: (*(volatile unsigned char *) (autcpu12_fio_base + autcpu12_fio_ctrl)) = 0x00; break;	}}/**	read device ready pin*/int autcpu12_device_ready(struct mtd_info *mtd){	return ( (*(volatile unsigned char *) (autcpu12_io_base + autcpu12_pedr)) & AUTCPU12_SMC_RDY) ? 1 : 0;}/* * Main initialization routine */int __init autcpu12_init (void){	struct nand_chip *this;	int err = 0;	/* Allocate memory for MTD device structure and private data */	autcpu12_mtd = kmalloc (sizeof(struct mtd_info) + sizeof (struct nand_chip),				GFP_KERNEL);	if (!autcpu12_mtd) {		printk ("Unable to allocate AUTCPU12 NAND MTD device structure.\n");		err = -ENOMEM;		goto out;	}	/* map physical adress */	autcpu12_fio_base=(unsigned long)ioremap(autcpu12_fio_pbase,SZ_1K);	if(!autcpu12_fio_base){		printk("Ioremap autcpu12 SmartMedia Card failed\n");		err = -EIO;		goto out_mtd;	}	/* Get pointer to private data */	this = (struct nand_chip *) (&autcpu12_mtd[1]);	/* Initialize structures */	memset((char *) autcpu12_mtd, 0, sizeof(struct mtd_info));	memset((char *) this, 0, sizeof(struct nand_chip));	/* Link the private data with the MTD structure */	autcpu12_mtd->priv = this;	/* Set address of NAND IO lines */	this->IO_ADDR_R = autcpu12_fio_base;	this->IO_ADDR_W = autcpu12_fio_base;	this->hwcontrol = autcpu12_hwcontrol;	this->dev_ready = autcpu12_device_ready;	/* 20 us command delay time */	this->chip_delay = 20;			this->eccmode = NAND_ECC_SOFT;	/* Enable the following for a flash based bad block table */	/*	this->options = NAND_USE_FLASH_BBT;	*/	this->options = NAND_USE_FLASH_BBT;		/* Scan to find existance of the device */	if (nand_scan (autcpu12_mtd, 1)) {		err = -ENXIO;		goto out_ior;	}		/* Register the partitions */	switch(autcpu12_mtd->size){		case SZ_16M: add_mtd_partitions(autcpu12_mtd, partition_info16k, NUM_PARTITIONS16K); break;		case SZ_32M: add_mtd_partitions(autcpu12_mtd, partition_info32k, NUM_PARTITIONS32K); break;		case SZ_64M: add_mtd_partitions(autcpu12_mtd, partition_info64k, NUM_PARTITIONS64K); break; 		case SZ_128M: add_mtd_partitions(autcpu12_mtd, partition_info128k, NUM_PARTITIONS128K); break; 		default: {			printk ("Unsupported SmartMedia device\n"); 			err = -ENXIO;			goto out_ior;		}	}	goto out;out_ior:	iounmap((void *)autcpu12_fio_base);out_mtd:	kfree (autcpu12_mtd);out:	return err;}module_init(autcpu12_init);/* * Clean up routine */#ifdef MODULEstatic void __exit autcpu12_cleanup (void){	/* Release resources, unregister device */	nand_release (autcpu12_mtd);	/* unmap physical adress */	iounmap((void *)autcpu12_fio_base);		/* Free the MTD device structure */	kfree (autcpu12_mtd);}module_exit(autcpu12_cleanup);#endifMODULE_LICENSE("GPL");MODULE_AUTHOR("Thomas Gleixner <tglx@linutronix.de>");MODULE_DESCRIPTION("Glue layer for SmartMediaCard on autronix autcpu12");