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

#include <asm/io.h>
#include <asm/hardware.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");
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
	6	* Copyright (C) 2004 Nokia Corporation
	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>
	39	#include <linux/mtd/mtd.h>
	40	#include <linux/mtd/map.h>
	41	#include <linux/mtd/partitions.h>
	42
	43	#include <asm/io.h>
	44	#include <asm/hardware.h>
10c96f2e TP	45	#include <asm/mach/flash.h>
	46	#include <asm/arch/tc.h>
	47
	48	#ifdef CONFIG_MTD_PARTITIONS
	49	static const char part_probes[] = { / "RedBoot", */ "cmdlinepart", NULL };
	50	#endif
	51
	52	struct omapflash_info {
	53	struct mtd_partition *parts;
	54	struct mtd_info *mtd;
	55	struct map_info map;
	56	};
	57
	58	static void omap_set_vpp(struct map_info *map, int enable)
	59	{
	60	static int count;
	61
	62	if (enable) {
	63	if (count++ == 0)
	64	OMAP_EMIFS_CONFIG_REG \|= OMAP_EMIFS_CONFIG_WP;
	65	} else {
	66	if (count && (--count == 0))
	67	OMAP_EMIFS_CONFIG_REG &= ~OMAP_EMIFS_CONFIG_WP;
	68	}
	69	}
	70
	71	static int __devinit omapflash_probe(struct device *dev)
	72	{
	73	int err;
	74	struct omapflash_info *info;
	75	struct platform_device *pdev = to_platform_device(dev);
	76	struct flash_platform_data *pdata = pdev->dev.platform_data;
	77	struct resource *res = pdev->resource;
	78	unsigned long size = res->end - res->start + 1;
	79
	80	info = kmalloc(sizeof(struct omapflash_info), GFP_KERNEL);
	81	if (!info)
	82	return -ENOMEM;
	83
	84	memset(info, 0, sizeof(struct omapflash_info));
	85
	86	if (!request_mem_region(res->start, size, "flash")) {
	87	err = -EBUSY;
	88	goto out_free_info;
	89	}
	90
	91	info->map.virt = ioremap(res->start, size);
	92	if (!info->map.virt) {
	93	err = -ENOMEM;
	94	goto out_release_mem_region;
	95	}
	96	info->map.name = pdev->dev.bus_id;
	97	info->map.phys = res->start;
	98	info->map.size = size;
	99	info->map.bankwidth = pdata->width;
	100	info->map.set_vpp = omap_set_vpp;
	101
	102	simple_map_init(&info->map);
	103	info->mtd = do_map_probe(pdata->map_name, &info->map);
	104	if (!info->mtd) {
	105	err = -EIO;
	106	goto out_iounmap;
	107	}
	108	info->mtd->owner = THIS_MODULE;
109
110	#ifdef CONFIG_MTD_PARTITIONS
111	err = parse_mtd_partitions(info->mtd, part_probes, &info->parts, 0);
112	if (err > 0)
113	add_mtd_partitions(info->mtd, info->parts, err);
114	else if (err < 0 && pdata->parts)
115	add_mtd_partitions(info->mtd, pdata->parts, pdata->nr_parts);
116	else
117	#endif
118	add_mtd_device(info->mtd);
119
120	dev_set_drvdata(&pdev->dev, info);
121
122	return 0;
123
124	out_iounmap:
125	iounmap(info->map.virt);
126	out_release_mem_region:
127	release_mem_region(res->start, size);
128	out_free_info:
129	kfree(info);
130
131	return err;
132	}
133
134	static int __devexit omapflash_remove(struct device *dev)
135	{
136	struct platform_device *pdev = to_platform_device(dev);
137	struct omapflash_info *info = dev_get_drvdata(&pdev->dev);
138
139	dev_set_drvdata(&pdev->dev, NULL);
140
141	if (info) {
142	if (info->parts) {
143	del_mtd_partitions(info->mtd);
144	kfree(info->parts);
145	} else
146	del_mtd_device(info->mtd);
147	map_destroy(info->mtd);
148	release_mem_region(info->map.phys, info->map.size);
149	iounmap((void __iomem *) info->map.virt);
150	kfree(info);
151	}
152
153	return 0;
154	}
155
156	static struct device_driver omapflash_driver = {
157	.name = "omapflash",
158	.bus = &platform_bus_type,
159	.probe = omapflash_probe,
160	.remove = __devexit_p(omapflash_remove),
161	};
162
163	static int __init omapflash_init(void)
164	{
165	return driver_register(&omapflash_driver);
166	}
167
168	static void __exit omapflash_exit(void)
169	{
170	driver_unregister(&omapflash_driver);
171	}
172
173	module_init(omapflash_init);
174	module_exit(omapflash_exit);
175
176	MODULE_LICENSE("GPL");
177	MODULE_DESCRIPTION("MTD NOR map driver for TI OMAP boards");
178