/*======================================================================    drivers/mtd/maps/integrator-flash.c: ARM Integrator flash map driver      Copyright (C) 2000 ARM Limited    Copyright (C) 2003 Deep Blue Solutions Ltd.     This program is free software; you can redistribute it and/or modify   it under the terms of the GNU General Public License as published by   the Free Software Foundation; either version 2 of the License, or   (at your option) any later version.     This program is distributed in the hope that it will be useful,   but WITHOUT ANY WARRANTY; without even the implied warranty of   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the   GNU General Public License for more details.     You should have received a copy of the GNU General Public License   along with this program; if not, write to the Free Software   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA     This is access code for flashes using ARM's flash partitioning    standards.   $Id: integrator-flash.c,v 1.16 2004/07/12 21:59:44 dwmw2 Exp $======================================================================*/#include <linux/config.h>#include <linux/module.h>#include <linux/types.h>#include <linux/kernel.h>#include <linux/slab.h>#include <linux/ioport.h>#include <linux/device.h>#include <linux/init.h>#include <linux/mtd/mtd.h>#include <linux/mtd/map.h>#include <linux/mtd/partitions.h>#include <asm/mach/flash.h>#include <asm/hardware.h>#include <asm/io.h>#include <asm/system.h>#ifdef CONFIG_ARCH_P720T#define FLASH_BASE		(0x04000000)#define FLASH_SIZE		(64*1024*1024)#endifstruct armflash_info {	struct flash_platform_data *plat;	struct resource		*res;	struct mtd_partition	*parts;	struct mtd_info		*mtd;	struct map_info		map;};static void armflash_set_vpp(struct map_info *map, int on){	struct armflash_info *info = container_of(map, struct armflash_info, map);	if (info->plat && info->plat->set_vpp)		info->plat->set_vpp(on);}static const char *probes[] = { "cmdlinepart", "RedBoot", "afs", NULL };static int armflash_probe(struct device *_dev){	struct platform_device *dev = to_platform_device(_dev);	struct flash_platform_data *plat = dev->dev.platform_data;	struct resource *res = dev->resource;	unsigned int size = res->end - res->start + 1;	struct armflash_info *info;	int err;	void *base;	info = kmalloc(sizeof(struct armflash_info), GFP_KERNEL);	if (!info) {		err = -ENOMEM;		goto out;	}	memset(info, 0, sizeof(struct armflash_info));	info->plat = plat;	if (plat && plat->init) {		err = plat->init();		if (err)			goto no_resource;	}	info->res = request_mem_region(res->start, size, "armflash");	if (!info->res) {		err = -EBUSY;		goto no_resource;	}	base = ioremap(res->start, size);	if (!base) {		err = -ENOMEM;		goto no_mem;	}	/*	 * look for CFI based flash parts fitted to this board	 */	info->map.size		= size;	info->map.bankwidth	= plat->width;	info->map.phys		= res->start;	info->map.virt		= (unsigned long) base;	info->map.name		= dev->dev.bus_id;	info->map.set_vpp	= armflash_set_vpp;	simple_map_init(&info->map);	/*	 * Also, the CFI layer automatically works out what size	 * of chips we have, and does the necessary identification	 * for us automatically.	 */	info->mtd = do_map_probe(plat->map_name, &info->map);	if (!info->mtd) {		err = -ENXIO;		goto no_device;	}	info->mtd->owner = THIS_MODULE;	err = parse_mtd_partitions(info->mtd, probes, &info->parts, 0);	if (err > 0) {		err = add_mtd_partitions(info->mtd, info->parts, err);		if (err)			printk(KERN_ERR			       "mtd partition registration failed: %d\n", err);	}	if (err == 0)		dev_set_drvdata(&dev->dev, info);	/*	 * If we got an error, free all resources.	 */	if (err < 0) {		if (info->mtd) {			del_mtd_partitions(info->mtd);			map_destroy(info->mtd);		}		if (info->parts)			kfree(info->parts); no_device:		iounmap(base); no_mem:		release_mem_region(res->start, size); no_resource:		if (plat && plat->exit)			plat->exit();		kfree(info);	} out:	return err;}static int armflash_remove(struct device *_dev){	struct platform_device *dev = to_platform_device(_dev);	struct armflash_info *info = dev_get_drvdata(&dev->dev);	dev_set_drvdata(&dev->dev, NULL);	if (info) {		if (info->mtd) {			del_mtd_partitions(info->mtd);			map_destroy(info->mtd);		}		if (info->parts)			kfree(info->parts);		iounmap((void *)info->map.virt);		release_resource(info->res);		kfree(info->res);		if (info->plat && info->plat->exit)			info->plat->exit();		kfree(info);	}	return 0;}static struct device_driver armflash_driver = {	.name		= "armflash",	.bus		= &platform_bus_type,	.probe		= armflash_probe,	.remove		= armflash_remove,};static int __init armflash_init(void){	return driver_register(&armflash_driver);}static void __exit armflash_exit(void){	driver_unregister(&armflash_driver);}module_init(armflash_init);module_exit(armflash_exit);MODULE_AUTHOR("ARM Ltd");MODULE_DESCRIPTION("ARM Integrator CFI map driver");MODULE_LICENSE("GPL");