[net-next-2.6.git] / drivers / mtd / maps / pxa2xx-flash.c

/*
 * Map driver for Intel XScale PXA2xx platforms.
 *
 * Author:	Nicolas Pitre
 * Copyright:	(C) 2001 MontaVista Software Inc.
 *
 * 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.
 */

#include <linux/module.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/platform_device.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/cacheflush.h>

#include <asm/mach/flash.h>

static void pxa2xx_map_inval_cache(struct map_info *map, unsigned long from,
				      ssize_t len)
{
	flush_ioremap_region(map->phys, map->cached, from, len);
}

struct pxa2xx_flash_info {
	struct mtd_partition	*parts;
	int			nr_parts;
	struct mtd_info		*mtd;
	struct map_info		map;
};


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


static int __init pxa2xx_flash_probe(struct platform_device *pdev)
{
	struct flash_platform_data *flash = pdev->dev.platform_data;
	struct pxa2xx_flash_info *info;
	struct mtd_partition *parts;
	struct resource *res;
	int ret = 0;

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (!res)
		return -ENODEV;

	info = kmalloc(sizeof(struct pxa2xx_flash_info), GFP_KERNEL);
	if (!info)
		return -ENOMEM;

	memset(info, 0, sizeof(struct pxa2xx_flash_info));
	info->map.name = (char *) flash->name;
	info->map.bankwidth = flash->width;
	info->map.phys = res->start;
	info->map.size = res->end - res->start + 1;
	info->parts = flash->parts;
	info->nr_parts = flash->nr_parts;

	info->map.virt = ioremap(info->map.phys, info->map.size);
	if (!info->map.virt) {
		printk(KERN_WARNING "Failed to ioremap %s\n",
		       info->map.name);
		return -ENOMEM;
	}
	info->map.cached =
		ioremap_cached(info->map.phys, info->map.size);
	if (!info->map.cached)
		printk(KERN_WARNING "Failed to ioremap cached %s\n",
		       info->map.name);
	info->map.inval_cache = pxa2xx_map_inval_cache;
	simple_map_init(&info->map);

	printk(KERN_NOTICE
	       "Probing %s at physical address 0x%08lx"
	       " (%d-bit bankwidth)\n",
	       info->map.name, (unsigned long)info->map.phys,
	       info->map.bankwidth * 8);

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

	if (!info->mtd) {
		iounmap((void *)info->map.virt);
		if (info->map.cached)
			iounmap(info->map.cached);
		return -EIO;
	}
	info->mtd->owner = THIS_MODULE;

#ifdef CONFIG_MTD_PARTITIONS
	ret = parse_mtd_partitions(info->mtd, probes, &parts, 0);

	if (ret > 0) {
		info->nr_parts = ret;
		info->parts = parts;
	}
#endif

	if (info->nr_parts) {
		add_mtd_partitions(info->mtd, info->parts,
				   info->nr_parts);
	} else {
		printk("Registering %s as whole device\n",
		       info->map.name);
		add_mtd_device(info->mtd);
	}

	platform_set_drvdata(pdev, info);
	return 0;
}

static int __devexit pxa2xx_flash_remove(struct platform_device *dev)
{
	struct pxa2xx_flash_info *info = platform_get_drvdata(dev);

	platform_set_drvdata(dev, NULL);

#ifdef CONFIG_MTD_PARTITIONS
	if (info->nr_parts)
		del_mtd_partitions(info->mtd);
	else
#endif
		del_mtd_device(info->mtd);

	map_destroy(info->mtd);
	iounmap(info->map.virt);
	if (info->map.cached)
		iounmap(info->map.cached);
	kfree(info->parts);
	kfree(info);
	return 0;
}

#ifdef CONFIG_PM
static void pxa2xx_flash_shutdown(struct platform_device *dev)
{
	struct pxa2xx_flash_info *info = platform_get_drvdata(dev);

	if (info && info->mtd->suspend(info->mtd) == 0)
		info->mtd->resume(info->mtd);
}
#else
#define pxa2xx_flash_shutdown NULL
#endif

static struct platform_driver pxa2xx_flash_driver = {
	.driver = {
		.name		= "pxa2xx-flash",
		.owner		= THIS_MODULE,
	},
	.probe		= pxa2xx_flash_probe,
	.remove		= __devexit_p(pxa2xx_flash_remove),
	.shutdown	= pxa2xx_flash_shutdown,
};

static int __init init_pxa2xx_flash(void)
{
	return platform_driver_register(&pxa2xx_flash_driver);
}

static void __exit cleanup_pxa2xx_flash(void)
{
	platform_driver_unregister(&pxa2xx_flash_driver);
}

module_init(init_pxa2xx_flash);
module_exit(cleanup_pxa2xx_flash);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Nicolas Pitre <nico@fluxnic.net>");
MODULE_DESCRIPTION("MTD map driver for Intel XScale PXA2xx");
Commit	Line	Data
e644f7d6 TP	1	/*
	2	* Map driver for Intel XScale PXA2xx platforms.
	3	*
	4	* Author: Nicolas Pitre
	5	* Copyright: (C) 2001 MontaVista Software Inc.
	6	*
	7	* This program is free software; you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License version 2 as
	9	* published by the Free Software Foundation.
	10	*/
	11
	12	#include <linux/module.h>
	13	#include <linux/types.h>
	14	#include <linux/kernel.h>
	15	#include <linux/init.h>
	16	#include <linux/platform_device.h>
e644f7d6 TP	17	#include <linux/mtd/mtd.h>
	18	#include <linux/mtd/map.h>
	19	#include <linux/mtd/partitions.h>
	20
	21	#include <asm/io.h>
a09e64fb	22	#include <mach/hardware.h>
355aaffd	23	#include <asm/cacheflush.h>
e644f7d6 TP	24
	25	#include <asm/mach/flash.h>
	26
	27	static void pxa2xx_map_inval_cache(struct map_info *map, unsigned long from,
	28	ssize_t len)
	29	{
355aaffd	30	flush_ioremap_region(map->phys, map->cached, from, len);
e644f7d6 TP	31	}
	32
	33	struct pxa2xx_flash_info {
	34	struct mtd_partition *parts;
	35	int nr_parts;
	36	struct mtd_info *mtd;
	37	struct map_info map;
	38	};
	39
	40
	41	static const char *probes[] = { "RedBoot", "cmdlinepart", NULL };
	42
	43
7a192ec3	44	static int __init pxa2xx_flash_probe(struct platform_device *pdev)
e644f7d6	45	{
e644f7d6 TP	46	struct flash_platform_data *flash = pdev->dev.platform_data;
	47	struct pxa2xx_flash_info *info;
	48	struct mtd_partition *parts;
	49	struct resource *res;
	50	int ret = 0;
	51
	52	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	53	if (!res)
	54	return -ENODEV;
	55
	56	info = kmalloc(sizeof(struct pxa2xx_flash_info), GFP_KERNEL);
	57	if (!info)
	58	return -ENOMEM;
	59
	60	memset(info, 0, sizeof(struct pxa2xx_flash_info));
	61	info->map.name = (char *) flash->name;
	62	info->map.bankwidth = flash->width;
	63	info->map.phys = res->start;
	64	info->map.size = res->end - res->start + 1;
	65	info->parts = flash->parts;
	66	info->nr_parts = flash->nr_parts;
	67
	68	info->map.virt = ioremap(info->map.phys, info->map.size);
	69	if (!info->map.virt) {
	70	printk(KERN_WARNING "Failed to ioremap %s\n",
	71	info->map.name);
	72	return -ENOMEM;
	73	}
	74	info->map.cached =
	75	ioremap_cached(info->map.phys, info->map.size);
	76	if (!info->map.cached)
	77	printk(KERN_WARNING "Failed to ioremap cached %s\n",
	78	info->map.name);
	79	info->map.inval_cache = pxa2xx_map_inval_cache;
	80	simple_map_init(&info->map);
	81
	82	printk(KERN_NOTICE
	83	"Probing %s at physical address 0x%08lx"
	84	" (%d-bit bankwidth)\n",
	85	info->map.name, (unsigned long)info->map.phys,
	86	info->map.bankwidth * 8);
	87
	88	info->mtd = do_map_probe(flash->map_name, &info->map);
	89
	90	if (!info->mtd) {
	91	iounmap((void *)info->map.virt);
	92	if (info->map.cached)
	93	iounmap(info->map.cached);
	94	return -EIO;
	95	}
	96	info->mtd->owner = THIS_MODULE;
	97
	98	#ifdef CONFIG_MTD_PARTITIONS
	99	ret = parse_mtd_partitions(info->mtd, probes, &parts, 0);
	100
	101	if (ret > 0) {
	102	info->nr_parts = ret;
	103	info->parts = parts;
	104	}
	105	#endif
	106
	107	if (info->nr_parts) {
	108	add_mtd_partitions(info->mtd, info->parts,
	109	info->nr_parts);
110	} else {
111	printk("Registering %s as whole device\n",
112	info->map.name);
113	add_mtd_device(info->mtd);
114	}
115
7a192ec3	116	platform_set_drvdata(pdev, info);
e644f7d6 TP	117	return 0;
	118	}
	119
67a52bb9	120	static int __devexit pxa2xx_flash_remove(struct platform_device *dev)
e644f7d6	121	{
7a192ec3	122	struct pxa2xx_flash_info *info = platform_get_drvdata(dev);
e644f7d6	123
7a192ec3	124	platform_set_drvdata(dev, NULL);
e644f7d6 TP	125
	126	#ifdef CONFIG_MTD_PARTITIONS
	127	if (info->nr_parts)
	128	del_mtd_partitions(info->mtd);
	129	else
	130	#endif
	131	del_mtd_device(info->mtd);
	132
	133	map_destroy(info->mtd);
	134	iounmap(info->map.virt);
	135	if (info->map.cached)
	136	iounmap(info->map.cached);
	137	kfree(info->parts);
	138	kfree(info);
	139	return 0;
	140	}
	141
	142	#ifdef CONFIG_PM
7a192ec3	143	static void pxa2xx_flash_shutdown(struct platform_device *dev)
e644f7d6	144	{
7a192ec3	145	struct pxa2xx_flash_info *info = platform_get_drvdata(dev);
e644f7d6 TP	146
	147	if (info && info->mtd->suspend(info->mtd) == 0)
	148	info->mtd->resume(info->mtd);
	149	}
	150	#else
e644f7d6 TP	151	#define pxa2xx_flash_shutdown NULL
	152	#endif
	153
7a192ec3 ML	154	static struct platform_driver pxa2xx_flash_driver = {
	155	.driver = {
	156	.name = "pxa2xx-flash",
	157	.owner = THIS_MODULE,
	158	},
e644f7d6	159	.probe = pxa2xx_flash_probe,
7a192ec3	160	.remove = __devexit_p(pxa2xx_flash_remove),
e644f7d6 TP	161	.shutdown = pxa2xx_flash_shutdown,
	162	};
	163
	164	static int __init init_pxa2xx_flash(void)
	165	{
7a192ec3	166	return platform_driver_register(&pxa2xx_flash_driver);
e644f7d6 TP	167	}
	168
	169	static void __exit cleanup_pxa2xx_flash(void)
	170	{
7a192ec3	171	platform_driver_unregister(&pxa2xx_flash_driver);
e644f7d6 TP	172	}
	173
	174	module_init(init_pxa2xx_flash);
	175	module_exit(cleanup_pxa2xx_flash);
	176
	177	MODULE_LICENSE("GPL");
2f82af08	178	MODULE_AUTHOR("Nicolas Pitre <nico@fluxnic.net>");
e644f7d6	179	MODULE_DESCRIPTION("MTD map driver for Intel XScale PXA2xx");