[deliverable/linux.git] / drivers / pnp / card.c

/*
 * card.c - contains functions for managing groups of PnP devices
 *
 * Copyright 2002 Adam Belay <ambx1@neo.rr.com>
 */

#include <linux/module.h>
#include <linux/slab.h>
#include <linux/pnp.h>
#include "base.h"

LIST_HEAD(pnp_cards);
static LIST_HEAD(pnp_card_drivers);

static const struct pnp_card_device_id *match_card(struct pnp_card_driver *drv,
						   struct pnp_card *card)
{
	const struct pnp_card_device_id *drv_id = drv->id_table;

	while (*drv_id->id) {
		if (compare_pnp_id(card->id, drv_id->id)) {
			int i = 0;

			for (;;) {
				int found;
				struct pnp_dev *dev;

				if (i == PNP_MAX_DEVICES ||
				    !*drv_id->devs[i].id)
					return drv_id;
				found = 0;
				card_for_each_dev(card, dev) {
					if (compare_pnp_id(dev->id,
						   drv_id->devs[i].id)) {
						found = 1;
						break;
					}
				}
				if (!found)
					break;
				i++;
			}
		}
		drv_id++;
	}
	return NULL;
}

static void card_remove(struct pnp_dev *dev)
{
	dev->card_link = NULL;
}

static void card_remove_first(struct pnp_dev *dev)
{
	struct pnp_card_driver *drv = to_pnp_card_driver(dev->driver);

	if (!dev->card || !drv)
		return;
	if (drv->remove)
		drv->remove(dev->card_link);
	drv->link.remove = &card_remove;
	kfree(dev->card_link);
	card_remove(dev);
}

static int card_probe(struct pnp_card *card, struct pnp_card_driver *drv)
{
	const struct pnp_card_device_id *id;
	struct pnp_card_link *clink;
	struct pnp_dev *dev;

	if (!drv->probe)
		return 0;
	id = match_card(drv, card);
	if (!id)
		return 0;

	clink = pnp_alloc(sizeof(*clink));
	if (!clink)
		return 0;
	clink->card = card;
	clink->driver = drv;
	clink->pm_state = PMSG_ON;

	if (drv->probe(clink, id) >= 0)
		return 1;

	/* Recovery */
	card_for_each_dev(card, dev) {
		if (dev->card_link == clink)
			pnp_release_card_device(dev);
	}
	kfree(clink);
	return 0;
}

/**
 * pnp_add_card_id - adds an EISA id to the specified card
 * @id: pointer to a pnp_id structure
 * @card: pointer to the desired card
 */
int pnp_add_card_id(struct pnp_id *id, struct pnp_card *card)
{
	struct pnp_id *ptr;

	id->next = NULL;
	ptr = card->id;
	while (ptr && ptr->next)
		ptr = ptr->next;
	if (ptr)
		ptr->next = id;
	else
		card->id = id;
	return 0;
}

static void pnp_free_card_ids(struct pnp_card *card)
{
	struct pnp_id *id;
	struct pnp_id *next;

	id = card->id;
	while (id) {
		next = id->next;
		kfree(id);
		id = next;
	}
}

static void pnp_release_card(struct device *dmdev)
{
	struct pnp_card *card = to_pnp_card(dmdev);

	pnp_free_card_ids(card);
	kfree(card);
}

static ssize_t pnp_show_card_name(struct device *dmdev,
				  struct device_attribute *attr, char *buf)
{
	char *str = buf;
	struct pnp_card *card = to_pnp_card(dmdev);

	str += sprintf(str, "%s\n", card->name);
	return (str - buf);
}

static DEVICE_ATTR(name, S_IRUGO, pnp_show_card_name, NULL);

static ssize_t pnp_show_card_ids(struct device *dmdev,
				 struct device_attribute *attr, char *buf)
{
	char *str = buf;
	struct pnp_card *card = to_pnp_card(dmdev);
	struct pnp_id *pos = card->id;

	while (pos) {
		str += sprintf(str, "%s\n", pos->id);
		pos = pos->next;
	}
	return (str - buf);
}

static DEVICE_ATTR(card_id, S_IRUGO, pnp_show_card_ids, NULL);

static int pnp_interface_attach_card(struct pnp_card *card)
{
	int rc = device_create_file(&card->dev, &dev_attr_name);

	if (rc)
		return rc;

	rc = device_create_file(&card->dev, &dev_attr_card_id);
	if (rc)
		goto err_name;

	return 0;

err_name:
	device_remove_file(&card->dev, &dev_attr_name);
	return rc;
}

/**
 * pnp_add_card - adds a PnP card to the PnP Layer
 * @card: pointer to the card to add
 */
int pnp_add_card(struct pnp_card *card)
{
	int error;
	struct list_head *pos, *temp;

	sprintf(card->dev.bus_id, "%02x:%02x", card->protocol->number,
		card->number);
	card->dev.parent = &card->protocol->dev;
	card->dev.bus = NULL;
	card->dev.release = &pnp_release_card;
	error = device_register(&card->dev);
	if (error) {
		pnp_err("sysfs failure, card '%s' will be unavailable",
			card->dev.bus_id);
		return error;
	}

	pnp_interface_attach_card(card);
	spin_lock(&pnp_lock);
	list_add_tail(&card->global_list, &pnp_cards);
	list_add_tail(&card->protocol_list, &card->protocol->cards);
	spin_unlock(&pnp_lock);

	/* we wait until now to add devices in order to ensure the drivers
	 * will be able to use all of the related devices on the card
	 * without waiting an unreasonable length of time */
	list_for_each(pos, &card->devices) {
		struct pnp_dev *dev = card_to_pnp_dev(pos);
		__pnp_add_device(dev);
	}

	/* match with card drivers */
	list_for_each_safe(pos, temp, &pnp_card_drivers) {
		struct pnp_card_driver *drv =
		    list_entry(pos, struct pnp_card_driver,
			       global_list);
		card_probe(card, drv);
	}
	return 0;
}

/**
 * pnp_remove_card - removes a PnP card from the PnP Layer
 * @card: pointer to the card to remove
 */
void pnp_remove_card(struct pnp_card *card)
{
	struct list_head *pos, *temp;

	device_unregister(&card->dev);
	spin_lock(&pnp_lock);
	list_del(&card->global_list);
	list_del(&card->protocol_list);
	spin_unlock(&pnp_lock);
	list_for_each_safe(pos, temp, &card->devices) {
		struct pnp_dev *dev = card_to_pnp_dev(pos);
		pnp_remove_card_device(dev);
	}
}

/**
 * pnp_add_card_device - adds a device to the specified card
 * @card: pointer to the card to add to
 * @dev: pointer to the device to add
 */
int pnp_add_card_device(struct pnp_card *card, struct pnp_dev *dev)
{
	dev->dev.parent = &card->dev;
	dev->card_link = NULL;
	snprintf(dev->dev.bus_id, BUS_ID_SIZE, "%02x:%02x.%02x",
		 dev->protocol->number, card->number, dev->number);
	spin_lock(&pnp_lock);
	dev->card = card;
	list_add_tail(&dev->card_list, &card->devices);
	spin_unlock(&pnp_lock);
	return 0;
}

/**
 * pnp_remove_card_device- removes a device from the specified card
 * @dev: pointer to the device to remove
 */
void pnp_remove_card_device(struct pnp_dev *dev)
{
	spin_lock(&pnp_lock);
	dev->card = NULL;
	list_del(&dev->card_list);
	spin_unlock(&pnp_lock);
	__pnp_remove_device(dev);
}

/**
 * pnp_request_card_device - Searches for a PnP device under the specified card
 * @clink: pointer to the card link, cannot be NULL
 * @id: pointer to a PnP ID structure that explains the rules for finding the device
 * @from: Starting place to search from. If NULL it will start from the begining.
 */
struct pnp_dev *pnp_request_card_device(struct pnp_card_link *clink,
					const char *id, struct pnp_dev *from)
{
	struct list_head *pos;
	struct pnp_dev *dev;
	struct pnp_card_driver *drv;
	struct pnp_card *card;

	if (!clink || !id)
		return NULL;

	card = clink->card;
	drv = clink->driver;
	if (!from) {
		pos = card->devices.next;
	} else {
		if (from->card != card)
			return NULL;
		pos = from->card_list.next;
	}
	while (pos != &card->devices) {
		dev = card_to_pnp_dev(pos);
		if ((!dev->card_link) && compare_pnp_id(dev->id, id))
			goto found;
		pos = pos->next;
	}

	return NULL;

found:
	dev->card_link = clink;
	dev->dev.driver = &drv->link.driver;
	if (pnp_bus_type.probe(&dev->dev))
		goto err_out;
	if (device_bind_driver(&dev->dev))
		goto err_out;

	return dev;

err_out:
	dev->dev.driver = NULL;
	dev->card_link = NULL;
	return NULL;
}

/**
 * pnp_release_card_device - call this when the driver no longer needs the device
 * @dev: pointer to the PnP device stucture
 */
void pnp_release_card_device(struct pnp_dev *dev)
{
	struct pnp_card_driver *drv = dev->card_link->driver;

	drv->link.remove = &card_remove;
	device_release_driver(&dev->dev);
	drv->link.remove = &card_remove_first;
}

/*
 * suspend/resume callbacks
 */
static int card_suspend(struct pnp_dev *dev, pm_message_t state)
{
	struct pnp_card_link *link = dev->card_link;

	if (link->pm_state.event == state.event)
		return 0;
	link->pm_state = state;
	return link->driver->suspend(link, state);
}

static int card_resume(struct pnp_dev *dev)
{
	struct pnp_card_link *link = dev->card_link;

	if (link->pm_state.event == PM_EVENT_ON)
		return 0;
	link->pm_state = PMSG_ON;
	link->driver->resume(link);
	return 0;
}

/**
 * pnp_register_card_driver - registers a PnP card driver with the PnP Layer
 * @drv: pointer to the driver to register
 */
int pnp_register_card_driver(struct pnp_card_driver *drv)
{
	int error;
	struct list_head *pos, *temp;

	drv->link.name = drv->name;
	drv->link.id_table = NULL;	/* this will disable auto matching */
	drv->link.flags = drv->flags;
	drv->link.probe = NULL;
	drv->link.remove = &card_remove_first;
	drv->link.suspend = drv->suspend ? card_suspend : NULL;
	drv->link.resume = drv->resume ? card_resume : NULL;

	error = pnp_register_driver(&drv->link);
	if (error < 0)
		return error;

	spin_lock(&pnp_lock);
	list_add_tail(&drv->global_list, &pnp_card_drivers);
	spin_unlock(&pnp_lock);

	list_for_each_safe(pos, temp, &pnp_cards) {
		struct pnp_card *card =
		    list_entry(pos, struct pnp_card, global_list);
		card_probe(card, drv);
	}
	return 0;
}

/**
 * pnp_unregister_card_driver - unregisters a PnP card driver from the PnP Layer
 * @drv: pointer to the driver to unregister
 */
void pnp_unregister_card_driver(struct pnp_card_driver *drv)
{
	spin_lock(&pnp_lock);
	list_del(&drv->global_list);
	spin_unlock(&pnp_lock);
	pnp_unregister_driver(&drv->link);
}

EXPORT_SYMBOL(pnp_request_card_device);
EXPORT_SYMBOL(pnp_release_card_device);
EXPORT_SYMBOL(pnp_register_card_driver);
EXPORT_SYMBOL(pnp_unregister_card_driver);
Commit	Line	Data
1da177e4 LT	1	/*
	2	* card.c - contains functions for managing groups of PnP devices
	3	*
	4	* Copyright 2002 Adam Belay <ambx1@neo.rr.com>
1da177e4 LT	5	*/
1da177e4 LT	6
1da177e4 LT	7	#include <linux/module.h>
1da177e4 LT	8	#include <linux/slab.h>
1da177e4 LT	9	#include <linux/pnp.h>
	10	#include "base.h"
	11
	12	LIST_HEAD(pnp_cards);
b449f63c	13	static LIST_HEAD(pnp_card_drivers);
1da177e4	14
9dd78466 BH	15	static const struct pnp_card_device_id match_card(struct pnp_card_driver drv,
9dd78466 BH	16	struct pnp_card *card)
1da177e4	17	{
9dd78466	18	const struct pnp_card_device_id *drv_id = drv->id_table;
07d4e9af	19
9dd78466 BH	20	while (*drv_id->id) {
9dd78466 BH	21	if (compare_pnp_id(card->id, drv_id->id)) {
1da177e4	22	int i = 0;
07d4e9af	23
1da177e4 LT	24	for (;;) {
	25	int found;
	26	struct pnp_dev *dev;
07d4e9af	27
1e0aa9ad BH	28	if (i == PNP_MAX_DEVICES \|\|
1e0aa9ad BH	29	!*drv_id->devs[i].id)
1da177e4 LT	30	return drv_id;
	31	found = 0;
	32	card_for_each_dev(card, dev) {
1e0aa9ad BH	33	if (compare_pnp_id(dev->id,
1e0aa9ad BH	34	drv_id->devs[i].id)) {
1da177e4 LT	35	found = 1;
	36	break;
	37	}
	38	}
9dd78466	39	if (!found)
1da177e4 LT	40	break;
	41	i++;
	42	}
	43	}
	44	drv_id++;
	45	}
	46	return NULL;
	47	}
	48
9dd78466	49	static void card_remove(struct pnp_dev *dev)
1da177e4 LT	50	{
	51	dev->card_link = NULL;
	52	}
982c6094	53
9dd78466	54	static void card_remove_first(struct pnp_dev *dev)
1da177e4	55	{
9dd78466	56	struct pnp_card_driver *drv = to_pnp_card_driver(dev->driver);
07d4e9af	57
1da177e4 LT	58	if (!dev->card \|\| !drv)
	59	return;
	60	if (drv->remove)
	61	drv->remove(dev->card_link);
	62	drv->link.remove = &card_remove;
	63	kfree(dev->card_link);
	64	card_remove(dev);
	65	}
	66
a9adb8db	67	static int card_probe(struct pnp_card card, struct pnp_card_driver drv)
1da177e4	68	{
a9adb8db JJ	69	const struct pnp_card_device_id *id;
	70	struct pnp_card_link *clink;
	71	struct pnp_dev *dev;
	72
	73	if (!drv->probe)
	74	return 0;
9dd78466	75	id = match_card(drv, card);
a9adb8db JJ	76	if (!id)
	77	return 0;
	78
	79	clink = pnp_alloc(sizeof(*clink));
	80	if (!clink)
	81	return 0;
	82	clink->card = card;
	83	clink->driver = drv;
	84	clink->pm_state = PMSG_ON;
	85
	86	if (drv->probe(clink, id) >= 0)
	87	return 1;
	88
	89	/* Recovery */
	90	card_for_each_dev(card, dev) {
	91	if (dev->card_link == clink)
	92	pnp_release_card_device(dev);
1da177e4	93	}
a9adb8db	94	kfree(clink);
1da177e4 LT	95	return 0;
	96	}
	97
	98	/**
	99	* pnp_add_card_id - adds an EISA id to the specified card
	100	* @id: pointer to a pnp_id structure
	101	* @card: pointer to the desired card
1da177e4	102	*/
9dd78466	103	int pnp_add_card_id(struct pnp_id id, struct pnp_card card)
1da177e4	104	{
9dd78466	105	struct pnp_id *ptr;
07d4e9af	106
1da177e4 LT	107	id->next = NULL;
	108	ptr = card->id;
	109	while (ptr && ptr->next)
	110	ptr = ptr->next;
	111	if (ptr)
	112	ptr->next = id;
	113	else
	114	card->id = id;
	115	return 0;
	116	}
	117
9dd78466	118	static void pnp_free_card_ids(struct pnp_card *card)
1da177e4	119	{
9dd78466	120	struct pnp_id *id;
1da177e4	121	struct pnp_id *next;
07d4e9af	122
1da177e4 LT	123	id = card->id;
	124	while (id) {
	125	next = id->next;
	126	kfree(id);
	127	id = next;
	128	}
	129	}
	130
	131	static void pnp_release_card(struct device *dmdev)
	132	{
9dd78466	133	struct pnp_card *card = to_pnp_card(dmdev);
07d4e9af	134
1da177e4 LT	135	pnp_free_card_ids(card);
	136	kfree(card);
	137	}
	138
9dd78466 BH	139	static ssize_t pnp_show_card_name(struct device *dmdev,
9dd78466 BH	140	struct device_attribute attr, char buf)
1da177e4 LT	141	{
	142	char *str = buf;
	143	struct pnp_card *card = to_pnp_card(dmdev);
07d4e9af	144
9dd78466	145	str += sprintf(str, "%s\n", card->name);
1da177e4 LT	146	return (str - buf);
	147	}
	148
9dd78466	149	static DEVICE_ATTR(name, S_IRUGO, pnp_show_card_name, NULL);
1da177e4	150
9dd78466 BH	151	static ssize_t pnp_show_card_ids(struct device *dmdev,
9dd78466 BH	152	struct device_attribute attr, char buf)
1da177e4 LT	153	{
	154	char *str = buf;
	155	struct pnp_card *card = to_pnp_card(dmdev);
9dd78466	156	struct pnp_id *pos = card->id;
1da177e4 LT	157
1da177e4 LT	158	while (pos) {
9dd78466	159	str += sprintf(str, "%s\n", pos->id);
1da177e4 LT	160	pos = pos->next;
	161	}
	162	return (str - buf);
	163	}
	164
9dd78466	165	static DEVICE_ATTR(card_id, S_IRUGO, pnp_show_card_ids, NULL);
1da177e4 LT	166
	167	static int pnp_interface_attach_card(struct pnp_card *card)
	168	{
9dd78466	169	int rc = device_create_file(&card->dev, &dev_attr_name);
07d4e9af	170
9dd78466 BH	171	if (rc)
9dd78466 BH	172	return rc;
bfc7ee20	173
9dd78466 BH	174	rc = device_create_file(&card->dev, &dev_attr_card_id);
	175	if (rc)
	176	goto err_name;
bfc7ee20	177
1da177e4	178	return 0;
bfc7ee20	179
1e0aa9ad	180	err_name:
9dd78466	181	device_remove_file(&card->dev, &dev_attr_name);
bfc7ee20	182	return rc;
1da177e4 LT	183	}
	184
	185	/**
	186	* pnp_add_card - adds a PnP card to the PnP Layer
	187	* @card: pointer to the card to add
	188	*/
9dd78466	189	int pnp_add_card(struct pnp_card *card)
1da177e4 LT	190	{
1da177e4 LT	191	int error;
9dd78466	192	struct list_head pos, temp;
07d4e9af	193
9dd78466 BH	194	sprintf(card->dev.bus_id, "%02x:%02x", card->protocol->number,
9dd78466 BH	195	card->number);
1da177e4 LT	196	card->dev.parent = &card->protocol->dev;
	197	card->dev.bus = NULL;
	198	card->dev.release = &pnp_release_card;
	199	error = device_register(&card->dev);
5bfc43a0	200	if (error) {
9dd78466 BH	201	pnp_err("sysfs failure, card '%s' will be unavailable",
9dd78466 BH	202	card->dev.bus_id);
5bfc43a0 BH	203	return error;
	204	}
	205
	206	pnp_interface_attach_card(card);
	207	spin_lock(&pnp_lock);
	208	list_add_tail(&card->global_list, &pnp_cards);
	209	list_add_tail(&card->protocol_list, &card->protocol->cards);
	210	spin_unlock(&pnp_lock);
	211
	212	/* we wait until now to add devices in order to ensure the drivers
	213	* will be able to use all of the related devices on the card
	214	* without waiting an unreasonable length of time */
	215	list_for_each(pos, &card->devices) {
	216	struct pnp_dev *dev = card_to_pnp_dev(pos);
	217	__pnp_add_device(dev);
	218	}
	219
	220	/* match with card drivers */
	221	list_for_each_safe(pos, temp, &pnp_card_drivers) {
	222	struct pnp_card_driver *drv =
	223	list_entry(pos, struct pnp_card_driver,
	224	global_list);
	225	card_probe(card, drv);
	226	}
	227	return 0;
1da177e4 LT	228	}
	229
	230	/**
	231	* pnp_remove_card - removes a PnP card from the PnP Layer
	232	* @card: pointer to the card to remove
	233	*/
9dd78466	234	void pnp_remove_card(struct pnp_card *card)
1da177e4 LT	235	{
1da177e4 LT	236	struct list_head pos, temp;
07d4e9af	237
1da177e4 LT	238	device_unregister(&card->dev);
	239	spin_lock(&pnp_lock);
	240	list_del(&card->global_list);
	241	list_del(&card->protocol_list);
	242	spin_unlock(&pnp_lock);
9dd78466	243	list_for_each_safe(pos, temp, &card->devices) {
1da177e4 LT	244	struct pnp_dev *dev = card_to_pnp_dev(pos);
	245	pnp_remove_card_device(dev);
	246	}
	247	}
	248
	249	/**
	250	* pnp_add_card_device - adds a device to the specified card
	251	* @card: pointer to the card to add to
	252	* @dev: pointer to the device to add
	253	*/
9dd78466	254	int pnp_add_card_device(struct pnp_card card, struct pnp_dev dev)
1da177e4	255	{
1da177e4 LT	256	dev->dev.parent = &card->dev;
1da177e4 LT	257	dev->card_link = NULL;
9dd78466 BH	258	snprintf(dev->dev.bus_id, BUS_ID_SIZE, "%02x:%02x.%02x",
9dd78466 BH	259	dev->protocol->number, card->number, dev->number);
1da177e4 LT	260	spin_lock(&pnp_lock);
	261	dev->card = card;
	262	list_add_tail(&dev->card_list, &card->devices);
	263	spin_unlock(&pnp_lock);
	264	return 0;
	265	}
	266
	267	/**
	268	* pnp_remove_card_device- removes a device from the specified card
1da177e4 LT	269	* @dev: pointer to the device to remove
1da177e4 LT	270	*/
9dd78466	271	void pnp_remove_card_device(struct pnp_dev *dev)
1da177e4 LT	272	{
	273	spin_lock(&pnp_lock);
	274	dev->card = NULL;
	275	list_del(&dev->card_list);
	276	spin_unlock(&pnp_lock);
	277	__pnp_remove_device(dev);
	278	}
	279
	280	/**
	281	* pnp_request_card_device - Searches for a PnP device under the specified card
3d41088f	282	* @clink: pointer to the card link, cannot be NULL
1da177e4 LT	283	* @id: pointer to a PnP ID structure that explains the rules for finding the device
	284	* @from: Starting place to search from. If NULL it will start from the begining.
	285	*/
9dd78466 BH	286	struct pnp_dev pnp_request_card_device(struct pnp_card_link clink,
9dd78466 BH	287	const char id, struct pnp_dev from)
1da177e4	288	{
9dd78466 BH	289	struct list_head *pos;
	290	struct pnp_dev *dev;
	291	struct pnp_card_driver *drv;
	292	struct pnp_card *card;
07d4e9af	293
1da177e4	294	if (!clink \|\| !id)
5bfc43a0 BH	295	return NULL;
5bfc43a0 BH	296
1da177e4 LT	297	card = clink->card;
	298	drv = clink->driver;
	299	if (!from) {
	300	pos = card->devices.next;
	301	} else {
	302	if (from->card != card)
5bfc43a0	303	return NULL;
1da177e4 LT	304	pos = from->card_list.next;
	305	}
	306	while (pos != &card->devices) {
	307	dev = card_to_pnp_dev(pos);
9dd78466	308	if ((!dev->card_link) && compare_pnp_id(dev->id, id))
1da177e4 LT	309	goto found;
	310	pos = pos->next;
	311	}
	312
1da177e4 LT	313	return NULL;
1da177e4 LT	314
1e0aa9ad	315	found:
1da177e4 LT	316	dev->card_link = clink;
1da177e4 LT	317	dev->dev.driver = &drv->link.driver;
bfc7ee20 JG	318	if (pnp_bus_type.probe(&dev->dev))
	319	goto err_out;
	320	if (device_bind_driver(&dev->dev))
	321	goto err_out;
	322
1da177e4	323	return dev;
bfc7ee20	324
1e0aa9ad	325	err_out:
bfc7ee20 JG	326	dev->dev.driver = NULL;
bfc7ee20 JG	327	dev->card_link = NULL;
bfc7ee20	328	return NULL;
1da177e4 LT	329	}
	330
	331	/**
	332	* pnp_release_card_device - call this when the driver no longer needs the device
	333	* @dev: pointer to the PnP device stucture
	334	*/
9dd78466	335	void pnp_release_card_device(struct pnp_dev *dev)
1da177e4	336	{
9dd78466	337	struct pnp_card_driver *drv = dev->card_link->driver;
07d4e9af	338
1da177e4 LT	339	drv->link.remove = &card_remove;
	340	device_release_driver(&dev->dev);
	341	drv->link.remove = &card_remove_first;
1da177e4 LT	342	}
1da177e4 LT	343
4c98cfef TI	344	/*
	345	* suspend/resume callbacks
	346	*/
	347	static int card_suspend(struct pnp_dev *dev, pm_message_t state)
	348	{
	349	struct pnp_card_link *link = dev->card_link;
07d4e9af	350
4c98cfef TI	351	if (link->pm_state.event == state.event)
	352	return 0;
	353	link->pm_state = state;
	354	return link->driver->suspend(link, state);
	355	}
	356
	357	static int card_resume(struct pnp_dev *dev)
	358	{
	359	struct pnp_card_link *link = dev->card_link;
07d4e9af	360
4c98cfef TI	361	if (link->pm_state.event == PM_EVENT_ON)
	362	return 0;
	363	link->pm_state = PMSG_ON;
	364	link->driver->resume(link);
	365	return 0;
	366	}
	367
1da177e4 LT	368	/**
	369	* pnp_register_card_driver - registers a PnP card driver with the PnP Layer
	370	* @drv: pointer to the driver to register
	371	*/
9dd78466	372	int pnp_register_card_driver(struct pnp_card_driver *drv)
1da177e4	373	{
982c6094	374	int error;
1da177e4 LT	375	struct list_head pos, temp;
	376
	377	drv->link.name = drv->name;
	378	drv->link.id_table = NULL; /* this will disable auto matching */
	379	drv->link.flags = drv->flags;
	380	drv->link.probe = NULL;
	381	drv->link.remove = &card_remove_first;
4c98cfef TI	382	drv->link.suspend = drv->suspend ? card_suspend : NULL;
4c98cfef TI	383	drv->link.resume = drv->resume ? card_resume : NULL;
1da177e4	384
982c6094 BH	385	error = pnp_register_driver(&drv->link);
	386	if (error < 0)
	387	return error;
d1d051b2	388
1da177e4 LT	389	spin_lock(&pnp_lock);
	390	list_add_tail(&drv->global_list, &pnp_card_drivers);
	391	spin_unlock(&pnp_lock);
d1d051b2	392
9dd78466 BH	393	list_for_each_safe(pos, temp, &pnp_cards) {
	394	struct pnp_card *card =
	395	list_entry(pos, struct pnp_card, global_list);
	396	card_probe(card, drv);
1da177e4	397	}
982c6094	398	return 0;
1da177e4 LT	399	}
	400
	401	/**
	402	* pnp_unregister_card_driver - unregisters a PnP card driver from the PnP Layer
	403	* @drv: pointer to the driver to unregister
	404	*/
9dd78466	405	void pnp_unregister_card_driver(struct pnp_card_driver *drv)
1da177e4 LT	406	{
	407	spin_lock(&pnp_lock);
	408	list_del(&drv->global_list);
	409	spin_unlock(&pnp_lock);
	410	pnp_unregister_driver(&drv->link);
	411	}
	412
1da177e4 LT	413	EXPORT_SYMBOL(pnp_request_card_device);
	414	EXPORT_SYMBOL(pnp_release_card_device);
	415	EXPORT_SYMBOL(pnp_register_card_driver);
	416	EXPORT_SYMBOL(pnp_unregister_card_driver);