[net-next-2.6.git] / drivers / mtd / maps / omap_nor.c

/*
 * 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/platform_device.h>
#include <linux/module.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/ioport.h>
#include <linux/slab.h>

#include <linux/mtd/mtd.h>
#include <linux/mtd/map.h>
#include <linux/mtd/partitions.h>

#include <asm/io.h>
#include <mach/hardware.h>
#include <asm/mach/flash.h>
#include <mach/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;
	u32 l;

	if (cpu_class_is_omap1()) {
		if (enable) {
			if (count++ == 0) {
				l = omap_readl(EMIFS_CONFIG);
				l |= OMAP_EMIFS_CONFIG_WP;
				omap_writel(l, EMIFS_CONFIG);
			}
		} else {
			if (count && (--count == 0)) {
				l = omap_readl(EMIFS_CONFIG);
				l &= ~OMAP_EMIFS_CONFIG_WP;
				omap_writel(l, EMIFS_CONFIG);
			}
		}
	}
}

static int __init omapflash_probe(struct platform_device *pdev)
{
	int err;
	struct omapflash_info *info;
	struct flash_platform_data *pdata = pdev->dev.platform_data;
	struct resource *res = pdev->resource;
	unsigned long size = res->end - res->start + 1;

	info = kzalloc(sizeof(struct omapflash_info), GFP_KERNEL);
	if (!info)
		return -ENOMEM;

	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);

	platform_set_drvdata(pdev, 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 __exit omapflash_remove(struct platform_device *pdev)
{
	struct omapflash_info *info = platform_get_drvdata(pdev);

	platform_set_drvdata(pdev, 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 platform_driver omapflash_driver = {
	.remove	= __exit_p(omapflash_remove),
	.driver = {
		.name	= "omapflash",
		.owner	= THIS_MODULE,
	},
};

static int __init omapflash_init(void)
{
	return platform_driver_probe(&omapflash_driver, omapflash_probe);
}

static void __exit omapflash_exit(void)
{
	platform_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");
MODULE_ALIAS("platform:omapflash");
Commit	Line	Data
10c96f2e TP	1	/*
	2	* Flash memory support for various TI OMAP boards
	3	*
	4	* Copyright (C) 2001-2002 MontaVista Software Inc.
	5	* Copyright (C) 2003-2004 Texas Instruments
69f34c98	6	* Copyright (C) 2004 Nokia Corporation
10c96f2e TP	7	*
	8	* Assembled using driver code copyright the companies above
	9	* and written by David Brownell, Jian Zhang <jzhang@ti.com>,
	10	* Tony Lindgren <tony@atomide.com> and others.
	11	*
	12	* This program is free software; you can redistribute it and/or modify it
	13	* under the terms of the GNU General Public License as published by the
	14	* Free Software Foundation; either version 2 of the License, or (at your
	15	* option) any later version.
	16	*
	17	* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
	18	* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
	19	* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
	20	* NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
	21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
	22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
	23	* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
	24	* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	25	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
	26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	27	*
	28	* You should have received a copy of the GNU General Public License along
	29	* with this program; if not, write to the Free Software Foundation, Inc.,
	30	* 675 Mass Ave, Cambridge, MA 02139, USA.
	31	*/
	32
d052d1be	33	#include <linux/platform_device.h>
10c96f2e TP	34	#include <linux/module.h>
	35	#include <linux/types.h>
	36	#include <linux/kernel.h>
	37	#include <linux/init.h>
	38	#include <linux/ioport.h>
4e57b681 TS	39	#include <linux/slab.h>
4e57b681 TS	40
10c96f2e TP	41	#include <linux/mtd/mtd.h>
	42	#include <linux/mtd/map.h>
	43	#include <linux/mtd/partitions.h>
	44
	45	#include <asm/io.h>
a09e64fb	46	#include <mach/hardware.h>
10c96f2e	47	#include <asm/mach/flash.h>
a09e64fb	48	#include <mach/tc.h>
10c96f2e TP	49
	50	#ifdef CONFIG_MTD_PARTITIONS
	51	static const char part_probes[] = { / "RedBoot", */ "cmdlinepart", NULL };
	52	#endif
	53
	54	struct omapflash_info {
	55	struct mtd_partition *parts;
	56	struct mtd_info *mtd;
	57	struct map_info map;
	58	};
	59
	60	static void omap_set_vpp(struct map_info *map, int enable)
	61	{
	62	static int count;
030b1545	63	u32 l;
10c96f2e	64
030b1545 TL	65	if (cpu_class_is_omap1()) {
	66	if (enable) {
	67	if (count++ == 0) {
	68	l = omap_readl(EMIFS_CONFIG);
	69	l \|= OMAP_EMIFS_CONFIG_WP;
	70	omap_writel(l, EMIFS_CONFIG);
	71	}
	72	} else {
	73	if (count && (--count == 0)) {
	74	l = omap_readl(EMIFS_CONFIG);
	75	l &= ~OMAP_EMIFS_CONFIG_WP;
	76	omap_writel(l, EMIFS_CONFIG);
	77	}
	78	}
10c96f2e TP	79	}
	80	}
	81
f1ebe4eb	82	static int __init omapflash_probe(struct platform_device *pdev)
10c96f2e TP	83	{
	84	int err;
	85	struct omapflash_info *info;
10c96f2e TP	86	struct flash_platform_data *pdata = pdev->dev.platform_data;
	87	struct resource *res = pdev->resource;
	88	unsigned long size = res->end - res->start + 1;
	89
95b93a0c	90	info = kzalloc(sizeof(struct omapflash_info), GFP_KERNEL);
10c96f2e TP	91	if (!info)
	92	return -ENOMEM;
	93
10c96f2e TP	94	if (!request_mem_region(res->start, size, "flash")) {
	95	err = -EBUSY;
	96	goto out_free_info;
	97	}
	98
	99	info->map.virt = ioremap(res->start, size);
	100	if (!info->map.virt) {
	101	err = -ENOMEM;
	102	goto out_release_mem_region;
	103	}
	104	info->map.name = pdev->dev.bus_id;
	105	info->map.phys = res->start;
	106	info->map.size = size;
	107	info->map.bankwidth = pdata->width;
	108	info->map.set_vpp = omap_set_vpp;
	109
	110	simple_map_init(&info->map);
	111	info->mtd = do_map_probe(pdata->map_name, &info->map);
	112	if (!info->mtd) {
	113	err = -EIO;
	114	goto out_iounmap;
	115	}
	116	info->mtd->owner = THIS_MODULE;
	117
	118	#ifdef CONFIG_MTD_PARTITIONS
	119	err = parse_mtd_partitions(info->mtd, part_probes, &info->parts, 0);
	120	if (err > 0)
	121	add_mtd_partitions(info->mtd, info->parts, err);
ba753211	122	else if (err <= 0 && pdata->parts)
10c96f2e TP	123	add_mtd_partitions(info->mtd, pdata->parts, pdata->nr_parts);
	124	else
	125	#endif
	126	add_mtd_device(info->mtd);
	127
3ae5eaec	128	platform_set_drvdata(pdev, info);
10c96f2e TP	129
	130	return 0;
	131
	132	out_iounmap:
	133	iounmap(info->map.virt);
	134	out_release_mem_region:
	135	release_mem_region(res->start, size);
	136	out_free_info:
	137	kfree(info);
	138
	139	return err;
	140	}
	141
f1ebe4eb	142	static int __exit omapflash_remove(struct platform_device *pdev)
10c96f2e	143	{
3ae5eaec	144	struct omapflash_info *info = platform_get_drvdata(pdev);
10c96f2e	145
3ae5eaec	146	platform_set_drvdata(pdev, NULL);
10c96f2e TP	147
	148	if (info) {
	149	if (info->parts) {
	150	del_mtd_partitions(info->mtd);
	151	kfree(info->parts);
	152	} else
	153	del_mtd_device(info->mtd);
	154	map_destroy(info->mtd);
	155	release_mem_region(info->map.phys, info->map.size);
	156	iounmap((void __iomem *) info->map.virt);
	157	kfree(info);
	158	}
	159
	160	return 0;
	161	}
	162
3ae5eaec	163	static struct platform_driver omapflash_driver = {
f1ebe4eb	164	.remove = __exit_p(omapflash_remove),
3ae5eaec RK	165	.driver = {
3ae5eaec RK	166	.name = "omapflash",
41d867c9	167	.owner = THIS_MODULE,
3ae5eaec	168	},
10c96f2e TP	169	};
	170
	171	static int __init omapflash_init(void)
	172	{
f1ebe4eb	173	return platform_driver_probe(&omapflash_driver, omapflash_probe);
10c96f2e TP	174	}
	175
	176	static void __exit omapflash_exit(void)
	177	{
3ae5eaec	178	platform_driver_unregister(&omapflash_driver);
10c96f2e TP	179	}
	180
	181	module_init(omapflash_init);
	182	module_exit(omapflash_exit);
	183
	184	MODULE_LICENSE("GPL");
	185	MODULE_DESCRIPTION("MTD NOR map driver for TI OMAP boards");
41d867c9	186	MODULE_ALIAS("platform:omapflash");