[mirror_ubuntu-jammy-kernel.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) {
		if (info->nr_parts == 0)
			del_mtd_device(info->mtd);
#ifdef CONFIG_MTD_PARTITIONS
		else
			del_mtd_partitions(info->mtd);
#endif
		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.
	 */
#ifdef CONFIG_MTD_PARTITIONS
	nr_parts = parse_mtd_partitions(info->mtd, part_probes, &parts, 0);
	if (nr_parts > 0) {
		info->parts = parts;
		part_type = "dynamic";
	} else
#endif
	{
		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");
		add_mtd_device(info->mtd);
	} else {
		printk(KERN_NOTICE "SA1100 flash: using %s partition "
			"definition\n", part_type);
		add_mtd_partitions(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) {
822e5e72 RK	229	if (info->nr_parts == 0)
	230	del_mtd_device(info->mtd);
	231	#ifdef CONFIG_MTD_PARTITIONS
	232	else
	233	del_mtd_partitions(info->mtd);
	234	#endif
1da177e4 LT	235	if (info->mtd != info->subdev[0].mtd)
1da177e4 LT	236	mtd_concat_destroy(info->mtd);
1da177e4 LT	237	}
1da177e4 LT	238
fa671646	239	kfree(info->parts);
1da177e4 LT	240
	241	for (i = info->num_subdev - 1; i >= 0; i--)
	242	sa1100_destroy_subdev(&info->subdev[i]);
	243	kfree(info);
0d2ef7d7 RK	244
	245	if (plat->exit)
	246	plat->exit();
1da177e4 LT	247	}
1da177e4 LT	248
5a134239	249	static struct sa_info *__devinit
57725f0a	250	sa1100_setup_mtd(struct platform_device pdev, struct flash_platform_data plat)
1da177e4 LT	251	{
	252	struct sa_info *info;
	253	int nr, size, i, ret = 0;
	254
	255	/*
	256	* Count number of devices.
	257	*/
	258	for (nr = 0; ; nr++)
	259	if (!platform_get_resource(pdev, IORESOURCE_MEM, nr))
	260	break;
	261
	262	if (nr == 0) {
	263	ret = -ENODEV;
	264	goto out;
	265	}
	266
	267	size = sizeof(struct sa_info) + sizeof(struct sa_subdev_info) * nr;
	268
	269	/*
	270	* Allocate the map_info structs in one go.
	271	*/
95b93a0c	272	info = kzalloc(size, GFP_KERNEL);
1da177e4 LT	273	if (!info) {
	274	ret = -ENOMEM;
	275	goto out;
	276	}
	277
0d2ef7d7 RK	278	if (plat->init) {
	279	ret = plat->init();
	280	if (ret)
	281	goto err;
	282	}
	283
1da177e4 LT	284	/*
	285	* Claim and then map the memory regions.
	286	*/
	287	for (i = 0; i < nr; i++) {
	288	struct sa_subdev_info *subdev = &info->subdev[i];
	289	struct resource *res;
	290
	291	res = platform_get_resource(pdev, IORESOURCE_MEM, i);
	292	if (!res)
	293	break;
	294
	295	subdev->map.name = subdev->name;
14e66f76	296	sprintf(subdev->name, "%s-%d", plat->name, i);
57725f0a	297	subdev->plat = plat;
1da177e4 LT	298
	299	ret = sa1100_probe_subdev(subdev, res);
	300	if (ret)
	301	break;
	302	}
	303
	304	info->num_subdev = i;
	305
	306	/*
	307	* ENXIO is special. It means we didn't find a chip when we probed.
	308	*/
	309	if (ret != 0 && !(ret == -ENXIO && info->num_subdev > 0))
	310	goto err;
	311
	312	/*
	313	* If we found one device, don't bother with concat support. If
	314	* we found multiple devices, use concat if we have it available,
	315	* otherwise fail. Either way, it'll be called "sa1100".
	316	*/
	317	if (info->num_subdev == 1) {
14e66f76	318	strcpy(info->subdev[0].name, plat->name);
1da177e4 LT	319	info->mtd = info->subdev[0].mtd;
	320	ret = 0;
	321	} else if (info->num_subdev > 1) {
1da177e4 LT	322	struct mtd_info *cdev[nr];
	323	/*
	324	* We detected multiple devices. Concatenate them together.
	325	*/
	326	for (i = 0; i < info->num_subdev; i++)
	327	cdev[i] = info->subdev[i].mtd;
	328
	329	info->mtd = mtd_concat_create(cdev, info->num_subdev,
14e66f76	330	plat->name);
1da177e4 LT	331	if (info->mtd == NULL)
1da177e4 LT	332	ret = -ENXIO;
1da177e4 LT	333	}
	334
	335	if (ret == 0)
	336	return info;
	337
	338	err:
0d2ef7d7	339	sa1100_destroy(info, plat);
1da177e4 LT	340	out:
	341	return ERR_PTR(ret);
	342	}
	343
	344	static const char *part_probes[] = { "cmdlinepart", "RedBoot", NULL };
	345
f0b1e589	346	static int __devinit sa1100_mtd_probe(struct platform_device *pdev)
1da177e4	347	{
57725f0a	348	struct flash_platform_data *plat = pdev->dev.platform_data;
1da177e4 LT	349	struct mtd_partition *parts;
	350	const char *part_type = NULL;
	351	struct sa_info *info;
	352	int err, nr_parts = 0;
	353
57725f0a	354	if (!plat)
1da177e4 LT	355	return -ENODEV;
1da177e4 LT	356
57725f0a	357	info = sa1100_setup_mtd(pdev, plat);
1da177e4 LT	358	if (IS_ERR(info)) {
	359	err = PTR_ERR(info);
	360	goto out;
	361	}
	362
	363	/*
	364	* Partition selection stuff.
	365	*/
	366	#ifdef CONFIG_MTD_PARTITIONS
	367	nr_parts = parse_mtd_partitions(info->mtd, part_probes, &parts, 0);
	368	if (nr_parts > 0) {
	369	info->parts = parts;
	370	part_type = "dynamic";
	371	} else
	372	#endif
	373	{
57725f0a RK	374	parts = plat->parts;
57725f0a RK	375	nr_parts = plat->nr_parts;
1da177e4 LT	376	part_type = "static";
	377	}
	378
	379	if (nr_parts == 0) {
	380	printk(KERN_NOTICE "SA1100 flash: no partition info "
	381	"available, registering whole flash\n");
	382	add_mtd_device(info->mtd);
	383	} else {
	384	printk(KERN_NOTICE "SA1100 flash: using %s partition "
	385	"definition\n", part_type);
	386	add_mtd_partitions(info->mtd, parts, nr_parts);
	387	}
	388
822e5e72 RK	389	info->nr_parts = nr_parts;
822e5e72 RK	390
3ae5eaec	391	platform_set_drvdata(pdev, info);
1da177e4 LT	392	err = 0;
	393
	394	out:
	395	return err;
	396	}
	397
3ae5eaec	398	static int __exit sa1100_mtd_remove(struct platform_device *pdev)
1da177e4	399	{
3ae5eaec RK	400	struct sa_info *info = platform_get_drvdata(pdev);
3ae5eaec RK	401	struct flash_platform_data *plat = pdev->dev.platform_data;
0d2ef7d7	402
3ae5eaec	403	platform_set_drvdata(pdev, NULL);
0d2ef7d7 RK	404	sa1100_destroy(info, plat);
0d2ef7d7 RK	405
1da177e4 LT	406	return 0;
	407	}
	408
	409	#ifdef CONFIG_PM
3ae5eaec	410	static void sa1100_mtd_shutdown(struct platform_device *dev)
13bfb34c	411	{
3ae5eaec	412	struct sa_info *info = platform_get_drvdata(dev);
13bfb34c RK	413	if (info && info->mtd->suspend(info->mtd) == 0)
	414	info->mtd->resume(info->mtd);
	415	}
1da177e4	416	#else
13bfb34c	417	#define sa1100_mtd_shutdown NULL
1da177e4 LT	418	#endif
1da177e4 LT	419
3ae5eaec	420	static struct platform_driver sa1100_mtd_driver = {
1da177e4 LT	421	.probe = sa1100_mtd_probe,
1da177e4 LT	422	.remove = __exit_p(sa1100_mtd_remove),
13bfb34c	423	.shutdown = sa1100_mtd_shutdown,
3ae5eaec	424	.driver = {
bcc8f3e0	425	.name = "sa1100-mtd",
41d867c9	426	.owner = THIS_MODULE,
3ae5eaec	427	},
1da177e4 LT	428	};
	429
	430	static int __init sa1100_mtd_init(void)
	431	{
3ae5eaec	432	return platform_driver_register(&sa1100_mtd_driver);
1da177e4 LT	433	}
	434
	435	static void __exit sa1100_mtd_exit(void)
	436	{
3ae5eaec	437	platform_driver_unregister(&sa1100_mtd_driver);
1da177e4 LT	438	}
	439
	440	module_init(sa1100_mtd_init);
	441	module_exit(sa1100_mtd_exit);
	442
	443	MODULE_AUTHOR("Nicolas Pitre");
	444	MODULE_DESCRIPTION("SA1100 CFI map driver");
	445	MODULE_LICENSE("GPL");
bcc8f3e0	446	MODULE_ALIAS("platform:sa1100-mtd");