[deliverable/linux.git] / drivers / mtd / maps / sa1100-flash.c

/*
 * Flash memory access on SA11x0 based devices
 *
 * (C) 2000 Nicolas Pitre <nico@fluxnic.net>
 */
#include <linux/module.h>
#include <linux/types.h>
#include <linux/ioport.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/slab.h>
#include <linux/platform_device.h>
#include <linux/err.h>
#include <linux/io.h>

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

#include <mach/hardware.h>
#include <asm/sizes.h>
#include <asm/mach/flash.h>

#if 0
/*
 * This is here for documentation purposes only - until these people
 * submit their machine types.  It will be gone January 2005.
 */
static struct mtd_partition consus_partitions[] = {
	{
		.name		= "Consus boot firmware",
		.offset		= 0,
		.size		= 0x00040000,
		.mask_flags	= MTD_WRITABLE, /* force read-only */
	}, {
		.name		= "Consus kernel",
		.offset		= 0x00040000,
		.size		= 0x00100000,
		.mask_flags	= 0,
	}, {
		.name		= "Consus disk",
		.offset		= 0x00140000,
		/* The rest (up to 16M) for jffs.  We could put 0 and
		   make it find the size automatically, but right now
		   i have 32 megs.  jffs will use all 32 megs if given
		   the chance, and this leads to horrible problems
		   when you try to re-flash the image because blob
		   won't erase the whole partition. */
		.size		= 0x01000000 - 0x00140000,
		.mask_flags	= 0,
	}, {
		/* this disk is a secondary disk, which can be used as
		   needed, for simplicity, make it the size of the other
		   consus partition, although realistically it could be
		   the remainder of the disk (depending on the file
		   system used) */
		 .name		= "Consus disk2",
		 .offset	= 0x01000000,
		 .size		= 0x01000000 - 0x00140000,
		 .mask_flags	= 0,
	}
};

/* Frodo has 2 x 16M 28F128J3A flash chips in bank 0: */
static struct mtd_partition frodo_partitions[] =
{
	{
		.name		= "bootloader",
		.size		= 0x00040000,
		.offset		= 0x00000000,
		.mask_flags	= MTD_WRITEABLE
	}, {
		.name		= "bootloader params",
		.size		= 0x00040000,
		.offset		= MTDPART_OFS_APPEND,
		.mask_flags	= MTD_WRITEABLE
	}, {
		.name		= "kernel",
		.size		= 0x00100000,
		.offset		= MTDPART_OFS_APPEND,
		.mask_flags	= MTD_WRITEABLE
	}, {
		.name		= "ramdisk",
		.size		= 0x00400000,
		.offset		= MTDPART_OFS_APPEND,
		.mask_flags	= MTD_WRITEABLE
	}, {
		.name		= "file system",
		.size		= MTDPART_SIZ_FULL,
		.offset		= MTDPART_OFS_APPEND
	}
};

static struct mtd_partition jornada56x_partitions[] = {
	{
		.name		= "bootldr",
		.size		= 0x00040000,
		.offset		= 0,
		.mask_flags	= MTD_WRITEABLE,
	}, {
		.name		= "rootfs",
		.size		= MTDPART_SIZ_FULL,
		.offset		= MTDPART_OFS_APPEND,
	}
};

static void jornada56x_set_vpp(int vpp)
{
	if (vpp)
		GPSR = GPIO_GPIO26;
	else
		GPCR = GPIO_GPIO26;
	GPDR |= GPIO_GPIO26;
}

/*
 * Machine        Phys          Size    set_vpp
 * Consus    : SA1100_CS0_PHYS SZ_32M
 * Frodo     : SA1100_CS0_PHYS SZ_32M
 * Jornada56x: SA1100_CS0_PHYS SZ_32M jornada56x_set_vpp
 */
#endif

struct sa_subdev_info {
	char name[16];
	struct map_info map;
	struct mtd_info *mtd;
	struct flash_platform_data *plat;
};

struct sa_info {
	struct mtd_partition	*parts;
	struct mtd_info		*mtd;
	int			num_subdev;
	unsigned int		nr_parts;
	struct sa_subdev_info	subdev[0];
};

static void sa1100_set_vpp(struct map_info *map, int on)
{
	struct sa_subdev_info *subdev = container_of(map, struct sa_subdev_info, map);
	subdev->plat->set_vpp(on);
}

static void sa1100_destroy_subdev(struct sa_subdev_info *subdev)
{
	if (subdev->mtd)
		map_destroy(subdev->mtd);
	if (subdev->map.virt)
		iounmap(subdev->map.virt);
	release_mem_region(subdev->map.phys, subdev->map.size);
}

static int sa1100_probe_subdev(struct sa_subdev_info *subdev, struct resource *res)
{
	unsigned long phys;
	unsigned int size;
	int ret;

	phys = res->start;
	size = res->end - phys + 1;

	/*
	 * Retrieve the bankwidth from the MSC registers.
	 * We currently only implement CS0 and CS1 here.
	 */
	switch (phys) {
	default:
		printk(KERN_WARNING "SA1100 flash: unknown base address "
		       "0x%08lx, assuming CS0\n", phys);

	case SA1100_CS0_PHYS:
		subdev->map.bankwidth = (MSC0 & MSC_RBW) ? 2 : 4;
		break;

	case SA1100_CS1_PHYS:
		subdev->map.bankwidth = ((MSC0 >> 16) & MSC_RBW) ? 2 : 4;
		break;
	}

	if (!request_mem_region(phys, size, subdev->name)) {
		ret = -EBUSY;
		goto out;
	}

	if (subdev->plat->set_vpp)
		subdev->map.set_vpp = sa1100_set_vpp;

	subdev->map.phys = phys;
	subdev->map.size = size;
	subdev->map.virt = ioremap(phys, size);
	if (!subdev->map.virt) {
		ret = -ENOMEM;
		goto err;
	}

	simple_map_init(&subdev->map);

	/*
	 * Now let's probe for the actual flash.  Do it here since
	 * specific machine settings might have been set above.
	 */
	subdev->mtd = do_map_probe(subdev->plat->map_name, &subdev->map);
	if (subdev->mtd == NULL) {
		ret = -ENXIO;
		goto err;
	}
	subdev->mtd->owner = THIS_MODULE;

	printk(KERN_INFO "SA1100 flash: CFI device at 0x%08lx, %uMiB, %d-bit\n",
		phys, (unsigned)(subdev->mtd->size >> 20),
		subdev->map.bankwidth * 8);

	return 0;

 err:
	sa1100_destroy_subdev(subdev);
 out:
	return ret;
}

static void sa1100_destroy(struct sa_info *info, struct flash_platform_data *plat)
{
	int i;

	if (info->mtd) {
		mtd_device_unregister(info->mtd);
		if (info->mtd != info->subdev[0].mtd)
			mtd_concat_destroy(info->mtd);
	}

	kfree(info->parts);

	for (i = info->num_subdev - 1; i >= 0; i--)
		sa1100_destroy_subdev(&info->subdev[i]);
	kfree(info);

	if (plat->exit)
		plat->exit();
}

static struct sa_info *__devinit
sa1100_setup_mtd(struct platform_device *pdev, struct flash_platform_data *plat)
{
	struct sa_info *info;
	int nr, size, i, ret = 0;

	/*
	 * Count number of devices.
	 */
	for (nr = 0; ; nr++)
		if (!platform_get_resource(pdev, IORESOURCE_MEM, nr))
			break;

	if (nr == 0) {
		ret = -ENODEV;
		goto out;
	}

	size = sizeof(struct sa_info) + sizeof(struct sa_subdev_info) * nr;

	/*
	 * Allocate the map_info structs in one go.
	 */
	info = kzalloc(size, GFP_KERNEL);
	if (!info) {
		ret = -ENOMEM;
		goto out;
	}

	if (plat->init) {
		ret = plat->init();
		if (ret)
			goto err;
	}

	/*
	 * Claim and then map the memory regions.
	 */
	for (i = 0; i < nr; i++) {
		struct sa_subdev_info *subdev = &info->subdev[i];
		struct resource *res;

		res = platform_get_resource(pdev, IORESOURCE_MEM, i);
		if (!res)
			break;

		subdev->map.name = subdev->name;
		sprintf(subdev->name, "%s-%d", plat->name, i);
		subdev->plat = plat;

		ret = sa1100_probe_subdev(subdev, res);
		if (ret)
			break;
	}

	info->num_subdev = i;

	/*
	 * ENXIO is special.  It means we didn't find a chip when we probed.
	 */
	if (ret != 0 && !(ret == -ENXIO && info->num_subdev > 0))
		goto err;

	/*
	 * If we found one device, don't bother with concat support.  If
	 * we found multiple devices, use concat if we have it available,
	 * otherwise fail.  Either way, it'll be called "sa1100".
	 */
	if (info->num_subdev == 1) {
		strcpy(info->subdev[0].name, plat->name);
		info->mtd = info->subdev[0].mtd;
		ret = 0;
	} else if (info->num_subdev > 1) {
		struct mtd_info *cdev[nr];
		/*
		 * We detected multiple devices.  Concatenate them together.
		 */
		for (i = 0; i < info->num_subdev; i++)
			cdev[i] = info->subdev[i].mtd;

		info->mtd = mtd_concat_create(cdev, info->num_subdev,
					      plat->name);
		if (info->mtd == NULL)
			ret = -ENXIO;
	}

	if (ret == 0)
		return info;

 err:
	sa1100_destroy(info, plat);
 out:
	return ERR_PTR(ret);
}

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

static int __devinit sa1100_mtd_probe(struct platform_device *pdev)
{
	struct flash_platform_data *plat = pdev->dev.platform_data;
	struct mtd_partition *parts;
	const char *part_type = NULL;
	struct sa_info *info;
	int err, nr_parts = 0;

	if (!plat)
		return -ENODEV;

	info = sa1100_setup_mtd(pdev, plat);
	if (IS_ERR(info)) {
		err = PTR_ERR(info);
		goto out;
	}

	/*
	 * Partition selection stuff.
	 */
	nr_parts = parse_mtd_partitions(info->mtd, part_probes, &parts, 0);
	if (nr_parts > 0) {
		info->parts = parts;
		part_type = "dynamic";
	} else {
		parts = plat->parts;
		nr_parts = plat->nr_parts;
		part_type = "static";
	}

	if (nr_parts == 0)
		printk(KERN_NOTICE "SA1100 flash: no partition info "
			"available, registering whole flash\n");
	else
		printk(KERN_NOTICE "SA1100 flash: using %s partition "
			"definition\n", part_type);

	mtd_device_register(info->mtd, parts, nr_parts);

	info->nr_parts = nr_parts;

	platform_set_drvdata(pdev, info);
	err = 0;

 out:
	return err;
}

static int __exit sa1100_mtd_remove(struct platform_device *pdev)
{
	struct sa_info *info = platform_get_drvdata(pdev);
	struct flash_platform_data *plat = pdev->dev.platform_data;

	platform_set_drvdata(pdev, NULL);
	sa1100_destroy(info, plat);

	return 0;
}

#ifdef CONFIG_PM
static void sa1100_mtd_shutdown(struct platform_device *dev)
{
	struct sa_info *info = platform_get_drvdata(dev);
	if (info && info->mtd->suspend(info->mtd) == 0)
		info->mtd->resume(info->mtd);
}
#else
#define sa1100_mtd_shutdown NULL
#endif

static struct platform_driver sa1100_mtd_driver = {
	.probe		= sa1100_mtd_probe,
	.remove		= __exit_p(sa1100_mtd_remove),
	.shutdown	= sa1100_mtd_shutdown,
	.driver		= {
		.name	= "sa1100-mtd",
		.owner	= THIS_MODULE,
	},
};

static int __init sa1100_mtd_init(void)
{
	return platform_driver_register(&sa1100_mtd_driver);
}

static void __exit sa1100_mtd_exit(void)
{
	platform_driver_unregister(&sa1100_mtd_driver);
}

module_init(sa1100_mtd_init);
module_exit(sa1100_mtd_exit);

MODULE_AUTHOR("Nicolas Pitre");
MODULE_DESCRIPTION("SA1100 CFI map driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:sa1100-mtd");
Commit	Line	Data
1da177e4 LT	1	/*
1da177e4 LT	2	* Flash memory access on SA11x0 based devices
69f34c98	3	*
2f82af08	4	* (C) 2000 Nicolas Pitre <nico@fluxnic.net>
1da177e4	5	*/
1da177e4 LT	6	#include <linux/module.h>
	7	#include <linux/types.h>
	8	#include <linux/ioport.h>
	9	#include <linux/kernel.h>
	10	#include <linux/init.h>
	11	#include <linux/errno.h>
	12	#include <linux/slab.h>
d052d1be	13	#include <linux/platform_device.h>
1da177e4	14	#include <linux/err.h>
99730225	15	#include <linux/io.h>
1da177e4 LT	16
	17	#include <linux/mtd/mtd.h>
	18	#include <linux/mtd/map.h>
	19	#include <linux/mtd/partitions.h>
	20	#include <linux/mtd/concat.h>
	21
a09e64fb	22	#include <mach/hardware.h>
1da177e4 LT	23	#include <asm/sizes.h>
	24	#include <asm/mach/flash.h>
	25
	26	#if 0
	27	/*
	28	* This is here for documentation purposes only - until these people
	29	* submit their machine types. It will be gone January 2005.
	30	*/
	31	static struct mtd_partition consus_partitions[] = {
	32	{
	33	.name = "Consus boot firmware",
	34	.offset = 0,
	35	.size = 0x00040000,
	36	.mask_flags = MTD_WRITABLE, /* force read-only */
	37	}, {
	38	.name = "Consus kernel",
	39	.offset = 0x00040000,
	40	.size = 0x00100000,
	41	.mask_flags = 0,
	42	}, {
	43	.name = "Consus disk",
	44	.offset = 0x00140000,
	45	/* The rest (up to 16M) for jffs. We could put 0 and
	46	make it find the size automatically, but right now
	47	i have 32 megs. jffs will use all 32 megs if given
	48	the chance, and this leads to horrible problems
	49	when you try to re-flash the image because blob
	50	won't erase the whole partition. */
	51	.size = 0x01000000 - 0x00140000,
	52	.mask_flags = 0,
	53	}, {
	54	/* this disk is a secondary disk, which can be used as
	55	needed, for simplicity, make it the size of the other
	56	consus partition, although realistically it could be
	57	the remainder of the disk (depending on the file
	58	system used) */
	59	.name = "Consus disk2",
	60	.offset = 0x01000000,
	61	.size = 0x01000000 - 0x00140000,
	62	.mask_flags = 0,
	63	}
	64	};
	65
	66	/* Frodo has 2 x 16M 28F128J3A flash chips in bank 0: */
	67	static struct mtd_partition frodo_partitions[] =
	68	{
	69	{
	70	.name = "bootloader",
	71	.size = 0x00040000,
	72	.offset = 0x00000000,
	73	.mask_flags = MTD_WRITEABLE
	74	}, {
	75	.name = "bootloader params",
	76	.size = 0x00040000,
	77	.offset = MTDPART_OFS_APPEND,
	78	.mask_flags = MTD_WRITEABLE
	79	}, {
	80	.name = "kernel",
	81	.size = 0x00100000,
	82	.offset = MTDPART_OFS_APPEND,
	83	.mask_flags = MTD_WRITEABLE
	84	}, {
	85	.name = "ramdisk",
	86	.size = 0x00400000,
87	.offset = MTDPART_OFS_APPEND,
88	.mask_flags = MTD_WRITEABLE
89	}, {
90	.name = "file system",
91	.size = MTDPART_SIZ_FULL,
92	.offset = MTDPART_OFS_APPEND
93	}
94	};
95
96	static struct mtd_partition jornada56x_partitions[] = {
97	{
98	.name = "bootldr",
99	.size = 0x00040000,
100	.offset = 0,
101	.mask_flags = MTD_WRITEABLE,
102	}, {
103	.name = "rootfs",
104	.size = MTDPART_SIZ_FULL,
105	.offset = MTDPART_OFS_APPEND,
106	}
107	};
108
109	static void jornada56x_set_vpp(int vpp)
110	{
111	if (vpp)
112	GPSR = GPIO_GPIO26;
113	else
114	GPCR = GPIO_GPIO26;
115	GPDR \|= GPIO_GPIO26;
116	}
117
118	/*
119	* Machine Phys Size set_vpp
120	* Consus : SA1100_CS0_PHYS SZ_32M
121	* Frodo : SA1100_CS0_PHYS SZ_32M
122	* Jornada56x: SA1100_CS0_PHYS SZ_32M jornada56x_set_vpp
123	*/
124	#endif
125
126	struct sa_subdev_info {
127	char name[16];
128	struct map_info map;
129	struct mtd_info *mtd;
57725f0a	130	struct flash_platform_data *plat;
1da177e4 LT	131	};
	132
	133	struct sa_info {
	134	struct mtd_partition *parts;
	135	struct mtd_info *mtd;
	136	int num_subdev;
822e5e72	137	unsigned int nr_parts;
1da177e4 LT	138	struct sa_subdev_info subdev[0];
	139	};
	140
	141	static void sa1100_set_vpp(struct map_info *map, int on)
	142	{
	143	struct sa_subdev_info *subdev = container_of(map, struct sa_subdev_info, map);
57725f0a	144	subdev->plat->set_vpp(on);
1da177e4 LT	145	}
	146
	147	static void sa1100_destroy_subdev(struct sa_subdev_info *subdev)
	148	{
	149	if (subdev->mtd)
	150	map_destroy(subdev->mtd);
	151	if (subdev->map.virt)
	152	iounmap(subdev->map.virt);
	153	release_mem_region(subdev->map.phys, subdev->map.size);
	154	}
	155
	156	static int sa1100_probe_subdev(struct sa_subdev_info subdev, struct resource res)
	157	{
	158	unsigned long phys;
	159	unsigned int size;
	160	int ret;
	161
	162	phys = res->start;
	163	size = res->end - phys + 1;
	164
	165	/*
	166	* Retrieve the bankwidth from the MSC registers.
	167	* We currently only implement CS0 and CS1 here.
	168	*/
	169	switch (phys) {
	170	default:
	171	printk(KERN_WARNING "SA1100 flash: unknown base address "
	172	"0x%08lx, assuming CS0\n", phys);
	173
	174	case SA1100_CS0_PHYS:
	175	subdev->map.bankwidth = (MSC0 & MSC_RBW) ? 2 : 4;
	176	break;
	177
	178	case SA1100_CS1_PHYS:
	179	subdev->map.bankwidth = ((MSC0 >> 16) & MSC_RBW) ? 2 : 4;
	180	break;
	181	}
	182
	183	if (!request_mem_region(phys, size, subdev->name)) {
	184	ret = -EBUSY;
	185	goto out;
	186	}
	187
57725f0a	188	if (subdev->plat->set_vpp)
1da177e4 LT	189	subdev->map.set_vpp = sa1100_set_vpp;
	190
	191	subdev->map.phys = phys;
	192	subdev->map.size = size;
	193	subdev->map.virt = ioremap(phys, size);
	194	if (!subdev->map.virt) {
	195	ret = -ENOMEM;
	196	goto err;
	197	}
	198
	199	simple_map_init(&subdev->map);
	200
	201	/*
	202	* Now let's probe for the actual flash. Do it here since
	203	* specific machine settings might have been set above.
	204	*/
57725f0a	205	subdev->mtd = do_map_probe(subdev->plat->map_name, &subdev->map);
1da177e4 LT	206	if (subdev->mtd == NULL) {
	207	ret = -ENXIO;
	208	goto err;
	209	}
	210	subdev->mtd->owner = THIS_MODULE;
	211
794d579a RK	212	printk(KERN_INFO "SA1100 flash: CFI device at 0x%08lx, %uMiB, %d-bit\n",
794d579a RK	213	phys, (unsigned)(subdev->mtd->size >> 20),
1da177e4 LT	214	subdev->map.bankwidth * 8);
	215
	216	return 0;
	217
	218	err:
	219	sa1100_destroy_subdev(subdev);
	220	out:
	221	return ret;
	222	}
	223
0d2ef7d7	224	static void sa1100_destroy(struct sa_info info, struct flash_platform_data plat)
1da177e4 LT	225	{
	226	int i;
	227
	228	if (info->mtd) {
2fe2e24e	229	mtd_device_unregister(info->mtd);
1da177e4 LT	230	if (info->mtd != info->subdev[0].mtd)
1da177e4 LT	231	mtd_concat_destroy(info->mtd);
1da177e4 LT	232	}
1da177e4 LT	233
fa671646	234	kfree(info->parts);
1da177e4 LT	235
	236	for (i = info->num_subdev - 1; i >= 0; i--)
	237	sa1100_destroy_subdev(&info->subdev[i]);
	238	kfree(info);
0d2ef7d7 RK	239
	240	if (plat->exit)
	241	plat->exit();
1da177e4 LT	242	}
1da177e4 LT	243
5a134239	244	static struct sa_info *__devinit
57725f0a	245	sa1100_setup_mtd(struct platform_device pdev, struct flash_platform_data plat)
1da177e4 LT	246	{
	247	struct sa_info *info;
	248	int nr, size, i, ret = 0;
	249
	250	/*
	251	* Count number of devices.
	252	*/
	253	for (nr = 0; ; nr++)
	254	if (!platform_get_resource(pdev, IORESOURCE_MEM, nr))
	255	break;
	256
	257	if (nr == 0) {
	258	ret = -ENODEV;
	259	goto out;
	260	}
	261
	262	size = sizeof(struct sa_info) + sizeof(struct sa_subdev_info) * nr;
	263
	264	/*
	265	* Allocate the map_info structs in one go.
	266	*/
95b93a0c	267	info = kzalloc(size, GFP_KERNEL);
1da177e4 LT	268	if (!info) {
	269	ret = -ENOMEM;
	270	goto out;
	271	}
	272
0d2ef7d7 RK	273	if (plat->init) {
	274	ret = plat->init();
	275	if (ret)
	276	goto err;
	277	}
	278
1da177e4 LT	279	/*
	280	* Claim and then map the memory regions.
	281	*/
	282	for (i = 0; i < nr; i++) {
	283	struct sa_subdev_info *subdev = &info->subdev[i];
	284	struct resource *res;
	285
	286	res = platform_get_resource(pdev, IORESOURCE_MEM, i);
	287	if (!res)
	288	break;
	289
	290	subdev->map.name = subdev->name;
14e66f76	291	sprintf(subdev->name, "%s-%d", plat->name, i);
57725f0a	292	subdev->plat = plat;
1da177e4 LT	293
	294	ret = sa1100_probe_subdev(subdev, res);
	295	if (ret)
	296	break;
	297	}
	298
	299	info->num_subdev = i;
	300
	301	/*
	302	* ENXIO is special. It means we didn't find a chip when we probed.
	303	*/
	304	if (ret != 0 && !(ret == -ENXIO && info->num_subdev > 0))
	305	goto err;
	306
	307	/*
	308	* If we found one device, don't bother with concat support. If
	309	* we found multiple devices, use concat if we have it available,
	310	* otherwise fail. Either way, it'll be called "sa1100".
	311	*/
	312	if (info->num_subdev == 1) {
14e66f76	313	strcpy(info->subdev[0].name, plat->name);
1da177e4 LT	314	info->mtd = info->subdev[0].mtd;
	315	ret = 0;
	316	} else if (info->num_subdev > 1) {
1da177e4 LT	317	struct mtd_info *cdev[nr];
	318	/*
	319	* We detected multiple devices. Concatenate them together.
	320	*/
	321	for (i = 0; i < info->num_subdev; i++)
	322	cdev[i] = info->subdev[i].mtd;
	323
	324	info->mtd = mtd_concat_create(cdev, info->num_subdev,
14e66f76	325	plat->name);
1da177e4 LT	326	if (info->mtd == NULL)
1da177e4 LT	327	ret = -ENXIO;
1da177e4 LT	328	}
	329
	330	if (ret == 0)
	331	return info;
	332
	333	err:
0d2ef7d7	334	sa1100_destroy(info, plat);
1da177e4 LT	335	out:
	336	return ERR_PTR(ret);
	337	}
	338
	339	static const char *part_probes[] = { "cmdlinepart", "RedBoot", NULL };
	340
f0b1e589	341	static int __devinit sa1100_mtd_probe(struct platform_device *pdev)
1da177e4	342	{
57725f0a	343	struct flash_platform_data *plat = pdev->dev.platform_data;
1da177e4 LT	344	struct mtd_partition *parts;
	345	const char *part_type = NULL;
	346	struct sa_info *info;
	347	int err, nr_parts = 0;
	348
57725f0a	349	if (!plat)
1da177e4 LT	350	return -ENODEV;
1da177e4 LT	351
57725f0a	352	info = sa1100_setup_mtd(pdev, plat);
1da177e4 LT	353	if (IS_ERR(info)) {
	354	err = PTR_ERR(info);
	355	goto out;
	356	}
	357
	358	/*
	359	* Partition selection stuff.
	360	*/
1da177e4 LT	361	nr_parts = parse_mtd_partitions(info->mtd, part_probes, &parts, 0);
	362	if (nr_parts > 0) {
	363	info->parts = parts;
	364	part_type = "dynamic";
2fe2e24e	365	} else {
57725f0a RK	366	parts = plat->parts;
57725f0a RK	367	nr_parts = plat->nr_parts;
1da177e4 LT	368	part_type = "static";
	369	}
	370
2fe2e24e	371	if (nr_parts == 0)
1da177e4 LT	372	printk(KERN_NOTICE "SA1100 flash: no partition info "
1da177e4 LT	373	"available, registering whole flash\n");
2fe2e24e	374	else
1da177e4 LT	375	printk(KERN_NOTICE "SA1100 flash: using %s partition "
1da177e4 LT	376	"definition\n", part_type);
2fe2e24e JI	377
2fe2e24e JI	378	mtd_device_register(info->mtd, parts, nr_parts);
1da177e4	379
822e5e72 RK	380	info->nr_parts = nr_parts;
822e5e72 RK	381
3ae5eaec	382	platform_set_drvdata(pdev, info);
1da177e4 LT	383	err = 0;
	384
	385	out:
	386	return err;
	387	}
	388
3ae5eaec	389	static int __exit sa1100_mtd_remove(struct platform_device *pdev)
1da177e4	390	{
3ae5eaec RK	391	struct sa_info *info = platform_get_drvdata(pdev);
3ae5eaec RK	392	struct flash_platform_data *plat = pdev->dev.platform_data;
0d2ef7d7	393
3ae5eaec	394	platform_set_drvdata(pdev, NULL);
0d2ef7d7 RK	395	sa1100_destroy(info, plat);
0d2ef7d7 RK	396
1da177e4 LT	397	return 0;
	398	}
	399
	400	#ifdef CONFIG_PM
3ae5eaec	401	static void sa1100_mtd_shutdown(struct platform_device *dev)
13bfb34c	402	{
3ae5eaec	403	struct sa_info *info = platform_get_drvdata(dev);
13bfb34c RK	404	if (info && info->mtd->suspend(info->mtd) == 0)
	405	info->mtd->resume(info->mtd);
	406	}
1da177e4	407	#else
13bfb34c	408	#define sa1100_mtd_shutdown NULL
1da177e4 LT	409	#endif
1da177e4 LT	410
3ae5eaec	411	static struct platform_driver sa1100_mtd_driver = {
1da177e4 LT	412	.probe = sa1100_mtd_probe,
1da177e4 LT	413	.remove = __exit_p(sa1100_mtd_remove),
13bfb34c	414	.shutdown = sa1100_mtd_shutdown,
3ae5eaec	415	.driver = {
bcc8f3e0	416	.name = "sa1100-mtd",
41d867c9	417	.owner = THIS_MODULE,
3ae5eaec	418	},
1da177e4 LT	419	};
	420
	421	static int __init sa1100_mtd_init(void)
	422	{
3ae5eaec	423	return platform_driver_register(&sa1100_mtd_driver);
1da177e4 LT	424	}
	425
	426	static void __exit sa1100_mtd_exit(void)
	427	{
3ae5eaec	428	platform_driver_unregister(&sa1100_mtd_driver);
1da177e4 LT	429	}
	430
	431	module_init(sa1100_mtd_init);
	432	module_exit(sa1100_mtd_exit);
	433
	434	MODULE_AUTHOR("Nicolas Pitre");
	435	MODULE_DESCRIPTION("SA1100 CFI map driver");
	436	MODULE_LICENSE("GPL");
bcc8f3e0	437	MODULE_ALIAS("platform:sa1100-mtd");