[linux-2.6-block.git] / drivers / misc / tifm_core.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 *  tifm_core.c - TI FlashMedia driver
 *
 *  Copyright (C) 2006 Alex Dubov <oakad@yahoo.com>
 */

#include <linux/tifm.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/idr.h>
#include <linux/module.h>

#define DRIVER_NAME "tifm_core"
#define DRIVER_VERSION "0.8"

static struct workqueue_struct *workqueue;
static DEFINE_IDR(tifm_adapter_idr);
static DEFINE_SPINLOCK(tifm_adapter_lock);

static const char *tifm_media_type_name(unsigned char type, unsigned char nt)
{
	const char *card_type_name[3][3] = {
		{ "SmartMedia/xD", "MemoryStick", "MMC/SD" },
		{ "XD", "MS", "SD"},
		{ "xd", "ms", "sd"}
	};

	if (nt > 2 || type < 1 || type > 3)
		return NULL;
	return card_type_name[nt][type - 1];
}

static int tifm_dev_match(struct tifm_dev *sock, struct tifm_device_id *id)
{
	if (sock->type == id->type)
		return 1;
	return 0;
}

static int tifm_bus_match(struct device *dev, struct device_driver *drv)
{
	struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev);
	struct tifm_driver *fm_drv = container_of(drv, struct tifm_driver,
						  driver);
	struct tifm_device_id *ids = fm_drv->id_table;

	if (ids) {
		while (ids->type) {
			if (tifm_dev_match(sock, ids))
				return 1;
			++ids;
		}
	}
	return 0;
}

static int tifm_uevent(struct device *dev, struct kobj_uevent_env *env)
{
	struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev);

	if (add_uevent_var(env, "TIFM_CARD_TYPE=%s", tifm_media_type_name(sock->type, 1)))
		return -ENOMEM;

	return 0;
}

static int tifm_device_probe(struct device *dev)
{
	struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev);
	struct tifm_driver *drv = container_of(dev->driver, struct tifm_driver,
					       driver);
	int rc = -ENODEV;

	get_device(dev);
	if (dev->driver && drv->probe) {
		rc = drv->probe(sock);
		if (!rc)
			return 0;
	}
	put_device(dev);
	return rc;
}

static void tifm_dummy_event(struct tifm_dev *sock)
{
	return;
}

static int tifm_device_remove(struct device *dev)
{
	struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev);
	struct tifm_driver *drv = container_of(dev->driver, struct tifm_driver,
					       driver);

	if (dev->driver && drv->remove) {
		sock->card_event = tifm_dummy_event;
		sock->data_event = tifm_dummy_event;
		drv->remove(sock);
		sock->dev.driver = NULL;
	}

	put_device(dev);
	return 0;
}

#ifdef CONFIG_PM

static int tifm_device_suspend(struct device *dev, pm_message_t state)
{
	struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev);
	struct tifm_driver *drv = container_of(dev->driver, struct tifm_driver,
					       driver);

	if (dev->driver && drv->suspend)
		return drv->suspend(sock, state);
	return 0;
}

static int tifm_device_resume(struct device *dev)
{
	struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev);
	struct tifm_driver *drv = container_of(dev->driver, struct tifm_driver,
					       driver);

	if (dev->driver && drv->resume)
		return drv->resume(sock);
	return 0;
}

#else

#define tifm_device_suspend NULL
#define tifm_device_resume NULL

#endif /* CONFIG_PM */

static ssize_t type_show(struct device *dev, struct device_attribute *attr,
			 char *buf)
{
	struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev);
	return sprintf(buf, "%x", sock->type);
}
static DEVICE_ATTR_RO(type);

static struct attribute *tifm_dev_attrs[] = {
	&dev_attr_type.attr,
	NULL,
};
ATTRIBUTE_GROUPS(tifm_dev);

static struct bus_type tifm_bus_type = {
	.name      = "tifm",
	.dev_groups = tifm_dev_groups,
	.match     = tifm_bus_match,
	.uevent    = tifm_uevent,
	.probe     = tifm_device_probe,
	.remove    = tifm_device_remove,
	.suspend   = tifm_device_suspend,
	.resume    = tifm_device_resume
};

static void tifm_free(struct device *dev)
{
	struct tifm_adapter *fm = container_of(dev, struct tifm_adapter, dev);

	kfree(fm);
}

static struct class tifm_adapter_class = {
	.name    = "tifm_adapter",
	.dev_release = tifm_free
};

struct tifm_adapter *tifm_alloc_adapter(unsigned int num_sockets,
					struct device *dev)
{
	struct tifm_adapter *fm;

	fm = kzalloc(sizeof(struct tifm_adapter)
		     + sizeof(struct tifm_dev*) * num_sockets, GFP_KERNEL);
	if (fm) {
		fm->dev.class = &tifm_adapter_class;
		fm->dev.parent = dev;
		device_initialize(&fm->dev);
		spin_lock_init(&fm->lock);
		fm->num_sockets = num_sockets;
	}
	return fm;
}
EXPORT_SYMBOL(tifm_alloc_adapter);

int tifm_add_adapter(struct tifm_adapter *fm)
{
	int rc;

	idr_preload(GFP_KERNEL);
	spin_lock(&tifm_adapter_lock);
	rc = idr_alloc(&tifm_adapter_idr, fm, 0, 0, GFP_NOWAIT);
	if (rc >= 0)
		fm->id = rc;
	spin_unlock(&tifm_adapter_lock);
	idr_preload_end();
	if (rc < 0)
		return rc;

	dev_set_name(&fm->dev, "tifm%u", fm->id);
	rc = device_add(&fm->dev);
	if (rc) {
		spin_lock(&tifm_adapter_lock);
		idr_remove(&tifm_adapter_idr, fm->id);
		spin_unlock(&tifm_adapter_lock);
	}

	return rc;
}
EXPORT_SYMBOL(tifm_add_adapter);

void tifm_remove_adapter(struct tifm_adapter *fm)
{
	unsigned int cnt;

	flush_workqueue(workqueue);
	for (cnt = 0; cnt < fm->num_sockets; ++cnt) {
		if (fm->sockets[cnt])
			device_unregister(&fm->sockets[cnt]->dev);
	}

	spin_lock(&tifm_adapter_lock);
	idr_remove(&tifm_adapter_idr, fm->id);
	spin_unlock(&tifm_adapter_lock);
	device_del(&fm->dev);
}
EXPORT_SYMBOL(tifm_remove_adapter);

void tifm_free_adapter(struct tifm_adapter *fm)
{
	put_device(&fm->dev);
}
EXPORT_SYMBOL(tifm_free_adapter);

void tifm_free_device(struct device *dev)
{
	struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev);
	kfree(sock);
}
EXPORT_SYMBOL(tifm_free_device);

struct tifm_dev *tifm_alloc_device(struct tifm_adapter *fm, unsigned int id,
				   unsigned char type)
{
	struct tifm_dev *sock = NULL;

	if (!tifm_media_type_name(type, 0))
		return sock;

	sock = kzalloc(sizeof(struct tifm_dev), GFP_KERNEL);
	if (sock) {
		spin_lock_init(&sock->lock);
		sock->type = type;
		sock->socket_id = id;
		sock->card_event = tifm_dummy_event;
		sock->data_event = tifm_dummy_event;

		sock->dev.parent = fm->dev.parent;
		sock->dev.bus = &tifm_bus_type;
		sock->dev.dma_mask = fm->dev.parent->dma_mask;
		sock->dev.release = tifm_free_device;

		dev_set_name(&sock->dev, "tifm_%s%u:%u",
			     tifm_media_type_name(type, 2), fm->id, id);
		printk(KERN_INFO DRIVER_NAME
		       ": %s card detected in socket %u:%u\n",
		       tifm_media_type_name(type, 0), fm->id, id);
	}
	return sock;
}
EXPORT_SYMBOL(tifm_alloc_device);

void tifm_eject(struct tifm_dev *sock)
{
	struct tifm_adapter *fm = dev_get_drvdata(sock->dev.parent);
	fm->eject(fm, sock);
}
EXPORT_SYMBOL(tifm_eject);

int tifm_has_ms_pif(struct tifm_dev *sock)
{
	struct tifm_adapter *fm = dev_get_drvdata(sock->dev.parent);
	return fm->has_ms_pif(fm, sock);
}
EXPORT_SYMBOL(tifm_has_ms_pif);

int tifm_map_sg(struct tifm_dev *sock, struct scatterlist *sg, int nents,
		int direction)
{
	return pci_map_sg(to_pci_dev(sock->dev.parent), sg, nents, direction);
}
EXPORT_SYMBOL(tifm_map_sg);

void tifm_unmap_sg(struct tifm_dev *sock, struct scatterlist *sg, int nents,
		   int direction)
{
	pci_unmap_sg(to_pci_dev(sock->dev.parent), sg, nents, direction);
}
EXPORT_SYMBOL(tifm_unmap_sg);

void tifm_queue_work(struct work_struct *work)
{
	queue_work(workqueue, work);
}
EXPORT_SYMBOL(tifm_queue_work);

int tifm_register_driver(struct tifm_driver *drv)
{
	drv->driver.bus = &tifm_bus_type;

	return driver_register(&drv->driver);
}
EXPORT_SYMBOL(tifm_register_driver);

void tifm_unregister_driver(struct tifm_driver *drv)
{
	driver_unregister(&drv->driver);
}
EXPORT_SYMBOL(tifm_unregister_driver);

static int __init tifm_init(void)
{
	int rc;

	workqueue = create_freezable_workqueue("tifm");
	if (!workqueue)
		return -ENOMEM;

	rc = bus_register(&tifm_bus_type);

	if (rc)
		goto err_out_wq;

	rc = class_register(&tifm_adapter_class);
	if (!rc)
		return 0;

	bus_unregister(&tifm_bus_type);

err_out_wq:
	destroy_workqueue(workqueue);

	return rc;
}

static void __exit tifm_exit(void)
{
	class_unregister(&tifm_adapter_class);
	bus_unregister(&tifm_bus_type);
	destroy_workqueue(workqueue);
}

subsys_initcall(tifm_init);
module_exit(tifm_exit);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Alex Dubov");
MODULE_DESCRIPTION("TI FlashMedia core driver");
MODULE_LICENSE("GPL");
MODULE_VERSION(DRIVER_VERSION);
Commit	Line	Data
d2912cb1	1	// SPDX-License-Identifier: GPL-2.0-only
4020f2d7 AD	2	/*
	3	* tifm_core.c - TI FlashMedia driver
	4	*
	5	* Copyright (C) 2006 Alex Dubov <oakad@yahoo.com>
4020f2d7 AD	6	*/
	7
	8	#include <linux/tifm.h>
5a0e3ad6	9	#include <linux/slab.h>
4020f2d7 AD	10	#include <linux/init.h>
4020f2d7 AD	11	#include <linux/idr.h>
eb12a679	12	#include <linux/module.h>
4020f2d7 AD	13
4020f2d7 AD	14	#define DRIVER_NAME "tifm_core"
4552f0cb	15	#define DRIVER_VERSION "0.8"
4020f2d7	16
3540af8f	17	static struct workqueue_struct *workqueue;
4020f2d7 AD	18	static DEFINE_IDR(tifm_adapter_idr);
	19	static DEFINE_SPINLOCK(tifm_adapter_lock);
	20
e23f2b8a	21	static const char *tifm_media_type_name(unsigned char type, unsigned char nt)
4020f2d7	22	{
e23f2b8a AD	23	const char *card_type_name[3][3] = {
	24	{ "SmartMedia/xD", "MemoryStick", "MMC/SD" },
	25	{ "XD", "MS", "SD"},
	26	{ "xd", "ms", "sd"}
	27	};
	28
	29	if (nt > 2 \|\| type < 1 \|\| type > 3)
	30	return NULL;
	31	return card_type_name[nt][type - 1];
4020f2d7 AD	32	}
4020f2d7 AD	33
e23f2b8a	34	static int tifm_dev_match(struct tifm_dev sock, struct tifm_device_id id)
4020f2d7	35	{
e23f2b8a	36	if (sock->type == id->type)
4020f2d7	37	return 1;
e23f2b8a AD	38	return 0;
	39	}
	40
	41	static int tifm_bus_match(struct device dev, struct device_driver drv)
	42	{
	43	struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev);
	44	struct tifm_driver *fm_drv = container_of(drv, struct tifm_driver,
	45	driver);
	46	struct tifm_device_id *ids = fm_drv->id_table;
	47
	48	if (ids) {
	49	while (ids->type) {
	50	if (tifm_dev_match(sock, ids))
	51	return 1;
	52	++ids;
	53	}
	54	}
	55	return 0;
4020f2d7 AD	56	}
4020f2d7 AD	57
7eff2e7a	58	static int tifm_uevent(struct device dev, struct kobj_uevent_env env)
4020f2d7	59	{
e23f2b8a	60	struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev);
4020f2d7	61
7eff2e7a	62	if (add_uevent_var(env, "TIFM_CARD_TYPE=%s", tifm_media_type_name(sock->type, 1)))
4020f2d7 AD	63	return -ENOMEM;
	64
	65	return 0;
	66	}
	67
8dc4a61e AD	68	static int tifm_device_probe(struct device *dev)
	69	{
	70	struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev);
	71	struct tifm_driver *drv = container_of(dev->driver, struct tifm_driver,
	72	driver);
	73	int rc = -ENODEV;
	74
	75	get_device(dev);
	76	if (dev->driver && drv->probe) {
	77	rc = drv->probe(sock);
	78	if (!rc)
	79	return 0;
	80	}
	81	put_device(dev);
	82	return rc;
	83	}
	84
	85	static void tifm_dummy_event(struct tifm_dev *sock)
	86	{
	87	return;
	88	}
	89
	90	static int tifm_device_remove(struct device *dev)
	91	{
	92	struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev);
	93	struct tifm_driver *drv = container_of(dev->driver, struct tifm_driver,
	94	driver);
	95
	96	if (dev->driver && drv->remove) {
	97	sock->card_event = tifm_dummy_event;
	98	sock->data_event = tifm_dummy_event;
	99	drv->remove(sock);
	100	sock->dev.driver = NULL;
	101	}
	102
	103	put_device(dev);
	104	return 0;
	105	}
	106
41d78f74 AD	107	#ifdef CONFIG_PM
	108
	109	static int tifm_device_suspend(struct device *dev, pm_message_t state)
	110	{
91f8d011	111	struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev);
8dc4a61e AD	112	struct tifm_driver *drv = container_of(dev->driver, struct tifm_driver,
8dc4a61e AD	113	driver);
41d78f74	114
8dc4a61e	115	if (dev->driver && drv->suspend)
91f8d011	116	return drv->suspend(sock, state);
41d78f74 AD	117	return 0;
	118	}
	119
	120	static int tifm_device_resume(struct device *dev)
	121	{
91f8d011	122	struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev);
8dc4a61e AD	123	struct tifm_driver *drv = container_of(dev->driver, struct tifm_driver,
8dc4a61e AD	124	driver);
41d78f74	125
8dc4a61e	126	if (dev->driver && drv->resume)
91f8d011	127	return drv->resume(sock);
41d78f74 AD	128	return 0;
	129	}
	130
	131	#else
	132
	133	#define tifm_device_suspend NULL
	134	#define tifm_device_resume NULL
	135
	136	#endif /* CONFIG_PM */
	137
4e64f223 AD	138	static ssize_t type_show(struct device dev, struct device_attribute attr,
	139	char *buf)
	140	{
	141	struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev);
	142	return sprintf(buf, "%x", sock->type);
	143	}
06cf261b	144	static DEVICE_ATTR_RO(type);
4e64f223	145
06cf261b GKH	146	static struct attribute *tifm_dev_attrs[] = {
	147	&dev_attr_type.attr,
	148	NULL,
4e64f223	149	};
06cf261b	150	ATTRIBUTE_GROUPS(tifm_dev);
4e64f223	151
4020f2d7	152	static struct bus_type tifm_bus_type = {
91f8d011	153	.name = "tifm",
06cf261b	154	.dev_groups = tifm_dev_groups,
91f8d011 AD	155	.match = tifm_bus_match,
	156	.uevent = tifm_uevent,
	157	.probe = tifm_device_probe,
	158	.remove = tifm_device_remove,
	159	.suspend = tifm_device_suspend,
	160	.resume = tifm_device_resume
4020f2d7 AD	161	};
4020f2d7 AD	162
7dd817d0	163	static void tifm_free(struct device *dev)
4020f2d7	164	{
7dd817d0	165	struct tifm_adapter *fm = container_of(dev, struct tifm_adapter, dev);
4020f2d7	166
4020f2d7 AD	167	kfree(fm);
	168	}
	169
	170	static struct class tifm_adapter_class = {
	171	.name = "tifm_adapter",
7dd817d0	172	.dev_release = tifm_free
4020f2d7 AD	173	};
4020f2d7 AD	174
6113ed73 AD	175	struct tifm_adapter *tifm_alloc_adapter(unsigned int num_sockets,
6113ed73 AD	176	struct device *dev)
4020f2d7 AD	177	{
	178	struct tifm_adapter *fm;
	179
6113ed73 AD	180	fm = kzalloc(sizeof(struct tifm_adapter)
6113ed73 AD	181	+ sizeof(struct tifm_dev) num_sockets, GFP_KERNEL);
4020f2d7	182	if (fm) {
7dd817d0 TJ	183	fm->dev.class = &tifm_adapter_class;
	184	fm->dev.parent = dev;
	185	device_initialize(&fm->dev);
6113ed73 AD	186	spin_lock_init(&fm->lock);
6113ed73 AD	187	fm->num_sockets = num_sockets;
4020f2d7 AD	188	}
	189	return fm;
	190	}
	191	EXPORT_SYMBOL(tifm_alloc_adapter);
	192
3540af8f	193	int tifm_add_adapter(struct tifm_adapter *fm)
4020f2d7 AD	194	{
	195	int rc;
	196
57f2667c	197	idr_preload(GFP_KERNEL);
4020f2d7	198	spin_lock(&tifm_adapter_lock);
57f2667c TH	199	rc = idr_alloc(&tifm_adapter_idr, fm, 0, 0, GFP_NOWAIT);
	200	if (rc >= 0)
	201	fm->id = rc;
4020f2d7	202	spin_unlock(&tifm_adapter_lock);
57f2667c TH	203	idr_preload_end();
57f2667c TH	204	if (rc < 0)
6113ed73 AD	205	return rc;
6113ed73 AD	206
0bad16aa	207	dev_set_name(&fm->dev, "tifm%u", fm->id);
7dd817d0	208	rc = device_add(&fm->dev);
6113ed73 AD	209	if (rc) {
	210	spin_lock(&tifm_adapter_lock);
	211	idr_remove(&tifm_adapter_idr, fm->id);
	212	spin_unlock(&tifm_adapter_lock);
4020f2d7	213	}
6113ed73	214
4020f2d7 AD	215	return rc;
	216	}
	217	EXPORT_SYMBOL(tifm_add_adapter);
	218
	219	void tifm_remove_adapter(struct tifm_adapter *fm)
	220	{
6113ed73 AD	221	unsigned int cnt;
6113ed73 AD	222
3540af8f	223	flush_workqueue(workqueue);
6113ed73 AD	224	for (cnt = 0; cnt < fm->num_sockets; ++cnt) {
	225	if (fm->sockets[cnt])
	226	device_unregister(&fm->sockets[cnt]->dev);
	227	}
4020f2d7 AD	228
	229	spin_lock(&tifm_adapter_lock);
	230	idr_remove(&tifm_adapter_idr, fm->id);
	231	spin_unlock(&tifm_adapter_lock);
7dd817d0	232	device_del(&fm->dev);
4020f2d7 AD	233	}
	234	EXPORT_SYMBOL(tifm_remove_adapter);
	235
6113ed73 AD	236	void tifm_free_adapter(struct tifm_adapter *fm)
6113ed73 AD	237	{
7dd817d0	238	put_device(&fm->dev);
6113ed73 AD	239	}
	240	EXPORT_SYMBOL(tifm_free_adapter);
	241
4020f2d7 AD	242	void tifm_free_device(struct device *dev)
4020f2d7 AD	243	{
2428a8fe AD	244	struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev);
2428a8fe AD	245	kfree(sock);
4020f2d7 AD	246	}
	247	EXPORT_SYMBOL(tifm_free_device);
	248
2428a8fe AD	249	struct tifm_dev tifm_alloc_device(struct tifm_adapter fm, unsigned int id,
2428a8fe AD	250	unsigned char type)
4020f2d7	251	{
2428a8fe AD	252	struct tifm_dev *sock = NULL;
	253
	254	if (!tifm_media_type_name(type, 0))
	255	return sock;
4020f2d7	256
2428a8fe AD	257	sock = kzalloc(sizeof(struct tifm_dev), GFP_KERNEL);
	258	if (sock) {
	259	spin_lock_init(&sock->lock);
	260	sock->type = type;
	261	sock->socket_id = id;
	262	sock->card_event = tifm_dummy_event;
	263	sock->data_event = tifm_dummy_event;
8e02f858	264
7dd817d0	265	sock->dev.parent = fm->dev.parent;
2428a8fe	266	sock->dev.bus = &tifm_bus_type;
7dd817d0	267	sock->dev.dma_mask = fm->dev.parent->dma_mask;
2428a8fe AD	268	sock->dev.release = tifm_free_device;
2428a8fe AD	269
0bad16aa KS	270	dev_set_name(&sock->dev, "tifm_%s%u:%u",
0bad16aa KS	271	tifm_media_type_name(type, 2), fm->id, id);
2428a8fe AD	272	printk(KERN_INFO DRIVER_NAME
	273	": %s card detected in socket %u:%u\n",
	274	tifm_media_type_name(type, 0), fm->id, id);
4020f2d7	275	}
2428a8fe	276	return sock;
4020f2d7 AD	277	}
	278	EXPORT_SYMBOL(tifm_alloc_device);
	279
	280	void tifm_eject(struct tifm_dev *sock)
	281	{
	282	struct tifm_adapter *fm = dev_get_drvdata(sock->dev.parent);
	283	fm->eject(fm, sock);
	284	}
	285	EXPORT_SYMBOL(tifm_eject);
	286
baf8532a AD	287	int tifm_has_ms_pif(struct tifm_dev *sock)
	288	{
	289	struct tifm_adapter *fm = dev_get_drvdata(sock->dev.parent);
	290	return fm->has_ms_pif(fm, sock);
	291	}
	292	EXPORT_SYMBOL(tifm_has_ms_pif);
	293
4020f2d7 AD	294	int tifm_map_sg(struct tifm_dev sock, struct scatterlist sg, int nents,
	295	int direction)
	296	{
	297	return pci_map_sg(to_pci_dev(sock->dev.parent), sg, nents, direction);
	298	}
	299	EXPORT_SYMBOL(tifm_map_sg);
	300
	301	void tifm_unmap_sg(struct tifm_dev sock, struct scatterlist sg, int nents,
	302	int direction)
	303	{
	304	pci_unmap_sg(to_pci_dev(sock->dev.parent), sg, nents, direction);
	305	}
	306	EXPORT_SYMBOL(tifm_unmap_sg);
	307
3540af8f AD	308	void tifm_queue_work(struct work_struct *work)
	309	{
	310	queue_work(workqueue, work);
	311	}
	312	EXPORT_SYMBOL(tifm_queue_work);
	313
4020f2d7 AD	314	int tifm_register_driver(struct tifm_driver *drv)
	315	{
	316	drv->driver.bus = &tifm_bus_type;
4020f2d7 AD	317
	318	return driver_register(&drv->driver);
	319	}
	320	EXPORT_SYMBOL(tifm_register_driver);
	321
	322	void tifm_unregister_driver(struct tifm_driver *drv)
	323	{
	324	driver_unregister(&drv->driver);
	325	}
	326	EXPORT_SYMBOL(tifm_unregister_driver);
	327
	328	static int __init tifm_init(void)
	329	{
3540af8f	330	int rc;
4020f2d7	331
58a69cb4	332	workqueue = create_freezable_workqueue("tifm");
3540af8f AD	333	if (!workqueue)
	334	return -ENOMEM;
	335
	336	rc = bus_register(&tifm_bus_type);
	337
	338	if (rc)
	339	goto err_out_wq;
	340
	341	rc = class_register(&tifm_adapter_class);
	342	if (!rc)
	343	return 0;
	344
	345	bus_unregister(&tifm_bus_type);
	346
	347	err_out_wq:
	348	destroy_workqueue(workqueue);
4020f2d7 AD	349
	350	return rc;
	351	}
	352
	353	static void __exit tifm_exit(void)
	354	{
	355	class_unregister(&tifm_adapter_class);
	356	bus_unregister(&tifm_bus_type);
3540af8f	357	destroy_workqueue(workqueue);
4020f2d7 AD	358	}
	359
	360	subsys_initcall(tifm_init);
	361	module_exit(tifm_exit);
	362
	363	MODULE_LICENSE("GPL");
	364	MODULE_AUTHOR("Alex Dubov");
	365	MODULE_DESCRIPTION("TI FlashMedia core driver");
	366	MODULE_LICENSE("GPL");
	367	MODULE_VERSION(DRIVER_VERSION);