[MTD] NOR flash map driver for TI OMAP boards.

# drivers/mtd/maps/Kconfig

# $Id: Kconfig,v 1.54 2005/06/30 22:41:36 tpoynor Exp $

# $Id: Kconfig,v 1.55 2005/07/02 01:53:24 tpoynor Exp $

menu "Mapping drivers for chip access"

	depends on MTD!=n

	  This enables access to the flash chips on the Interface MPC-1211(CTP/PCI/MPC-SH02).

	  If you have such a board, say 'Y'.

config MTD_OMAP_NOR

	tristate "TI OMAP board mappings"

	depends on MTD_CFI && ARCH_OMAP

	help

	  This enables access to the NOR flash chips on TI OMAP-based

	  boards defining flash platform devices and flash platform data.

	  These boards include the Innovator, H2, H3, OSK, Perseus2, and

	  more.  If you have such a board, say 'Y'.

# This needs CFI or JEDEC, depending on the cards found.

config MTD_PCI

	tristate "PCI MTD driver"

#

# linux/drivers/maps/Makefile

#

# $Id: Makefile.common,v 1.29 2005/06/30 22:41:36 tpoynor Exp $

# $Id: Makefile.common,v 1.30 2005/07/02 01:53:24 tpoynor Exp $

ifeq ($(CONFIG_MTD_COMPLEX_MAPPINGS),y)

obj-$(CONFIG_MTD)		+= map_funcs.o

obj-$(CONFIG_MTD_DMV182)	+= dmv182.o

obj-$(CONFIG_MTD_SHARP_SL)	+= sharpsl-flash.o

obj-$(CONFIG_MTD_PLATRAM)	+= plat-ram.o

obj-$(CONFIG_MTD_OMAP_NOR)	+= omap_nor.o

/*

 * Flash memory support for various TI OMAP boards

 *

 * Copyright (C) 2001-2002 MontaVista Software Inc.

 * Copyright (C) 2003-2004 Texas Instruments

 * Copyright (C) 2004 Nokia Corporation 

 *

 *	Assembled using driver code copyright the companies above

 *	and written by David Brownell, Jian Zhang <jzhang@ti.com>,

 * 	Tony Lindgren <tony@atomide.com> and others.

 *

 * 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 SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED

 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF

 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN

 * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,

 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT

 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF

 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON

 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF

 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 *

 * 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.,

 * 675 Mass Ave, Cambridge, MA 02139, USA.

 */

#include <linux/device.h>

#include <linux/module.h>

#include <linux/types.h>

#include <linux/kernel.h>

#include <linux/init.h>

#include <linux/ioport.h>

#include <linux/mtd/mtd.h>

#include <linux/mtd/map.h>

#include <linux/mtd/partitions.h>

#include <asm/io.h>

#include <asm/hardware.h>

#include <asm/mach-types.h>

#include <asm/mach/flash.h>

#include <asm/arch/tc.h>

#ifdef CONFIG_MTD_PARTITIONS

static const char *part_probes[] = { /* "RedBoot", */ "cmdlinepart", NULL };

#endif

struct omapflash_info {

	struct mtd_partition	*parts;

	struct mtd_info		*mtd;

	struct map_info		map;

};

static void omap_set_vpp(struct map_info *map, int enable)

{

	static int	count;

	if (enable) {

		if (count++ == 0)

			OMAP_EMIFS_CONFIG_REG |= OMAP_EMIFS_CONFIG_WP;

	} else {

		if (count && (--count == 0))

			OMAP_EMIFS_CONFIG_REG &= ~OMAP_EMIFS_CONFIG_WP;

	}

}

static int __devinit omapflash_probe(struct device *dev)

{

	int err;

	struct omapflash_info *info;

	struct platform_device *pdev = to_platform_device(dev);

	struct flash_platform_data *pdata = pdev->dev.platform_data;

	struct resource *res = pdev->resource;

	unsigned long size = res->end - res->start + 1;

	info = kmalloc(sizeof(struct omapflash_info), GFP_KERNEL);

	if (!info)

		return -ENOMEM;

	memset(info, 0, sizeof(struct omapflash_info));

	if (!request_mem_region(res->start, size, "flash")) {

		err = -EBUSY;

		goto out_free_info;

	}

	info->map.virt		= ioremap(res->start, size);

	if (!info->map.virt) {

		err = -ENOMEM;

		goto out_release_mem_region;

	}

	info->map.name		= pdev->dev.bus_id;

	info->map.phys		= res->start;

	info->map.size		= size;

	info->map.bankwidth	= pdata->width;

	info->map.set_vpp	= omap_set_vpp;

	simple_map_init(&info->map);

	info->mtd = do_map_probe(pdata->map_name, &info->map);

	if (!info->mtd) {

		err = -EIO;

		goto out_iounmap;

	}

	info->mtd->owner = THIS_MODULE;

#ifdef CONFIG_MTD_PARTITIONS

	err = parse_mtd_partitions(info->mtd, part_probes, &info->parts, 0);

	if (err > 0)

		add_mtd_partitions(info->mtd, info->parts, err);

	else if (err < 0 && pdata->parts)

		add_mtd_partitions(info->mtd, pdata->parts, pdata->nr_parts);

	else

#endif

		add_mtd_device(info->mtd);

	dev_set_drvdata(&pdev->dev, info);

	return 0;

out_iounmap:

	iounmap(info->map.virt);

out_release_mem_region:

	release_mem_region(res->start, size);

out_free_info:

	kfree(info);

	return err;

}

static int __devexit omapflash_remove(struct device *dev)

{

	struct platform_device *pdev = to_platform_device(dev);

	struct omapflash_info *info = dev_get_drvdata(&pdev->dev);

	dev_set_drvdata(&pdev->dev, NULL);

	if (info) {

		if (info->parts) {

			del_mtd_partitions(info->mtd);

			kfree(info->parts);

		} else

			del_mtd_device(info->mtd);

		map_destroy(info->mtd);

		release_mem_region(info->map.phys, info->map.size);

		iounmap((void __iomem *) info->map.virt);

		kfree(info);

	}

	return 0;

}

static struct device_driver omapflash_driver = {

	.name	= "omapflash",

	.bus	= &platform_bus_type,

	.probe	= omapflash_probe,

	.remove	= __devexit_p(omapflash_remove),

};

static int __init omapflash_init(void)

{

	return driver_register(&omapflash_driver);

}

static void __exit omapflash_exit(void)

{

	driver_unregister(&omapflash_driver);

}

module_init(omapflash_init);

module_exit(omapflash_exit);

MODULE_LICENSE("GPL");

MODULE_DESCRIPTION("MTD NOR map driver for TI OMAP boards");