[net-next-2.6.git] / drivers / misc / tifm_core.c

/*
 *  tifm_core.c - TI FlashMedia driver
 *
 *  Copyright (C) 2006 Alex Dubov <oakad@yahoo.com>
 *
 * 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/tifm.h>
#include <linux/init.h>
#include <linux/idr.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, char **envp, int num_envp,
		       char *buffer, int buffer_size)
{
	struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev);
	int i = 0;
	int length = 0;

	if (add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
			   "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 *fm_dev = 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(fm_dev, state);
	return 0;
}

static int tifm_device_resume(struct device *dev)
{
	struct tifm_dev *fm_dev = 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(fm_dev);
	return 0;
}

#else

#define tifm_device_suspend NULL
#define tifm_device_resume NULL

#endif /* CONFIG_PM */

static struct bus_type tifm_bus_type = {
	.name    = "tifm",
	.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 class_device *cdev)
{
	struct tifm_adapter *fm = container_of(cdev, struct tifm_adapter, cdev);

	kfree(fm);
}

static struct class tifm_adapter_class = {
	.name    = "tifm_adapter",
	.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->cdev.class = &tifm_adapter_class;
		fm->cdev.dev = dev;
		class_device_initialize(&fm->cdev);
		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;

	if (!idr_pre_get(&tifm_adapter_idr, GFP_KERNEL))
		return -ENOMEM;

	spin_lock(&tifm_adapter_lock);
	rc = idr_get_new(&tifm_adapter_idr, fm, &fm->id);
	spin_unlock(&tifm_adapter_lock);
	if (rc)
		return rc;

	snprintf(fm->cdev.class_id, BUS_ID_SIZE, "tifm%u", fm->id);
	rc = class_device_add(&fm->cdev);
	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);
	class_device_del(&fm->cdev);
}
EXPORT_SYMBOL(tifm_remove_adapter);

void tifm_free_adapter(struct tifm_adapter *fm)
{
	class_device_put(&fm->cdev);
}
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->cdev.dev;
		sock->dev.bus = &tifm_bus_type;
		sock->dev.dma_mask = fm->cdev.dev->dma_mask;
		sock->dev.release = tifm_free_device;

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