[mirror_ubuntu-artful-kernel.git] / arch / ppc / syslib / of_device.c

#include <linux/config.h>
#include <linux/string.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/mod_devicetable.h>
#include <linux/slab.h>

#include <asm/errno.h>
#include <asm/of_device.h>

/**
 * of_match_device - Tell if an of_device structure has a matching
 * of_match structure
 * @ids: array of of device match structures to search in
 * @dev: the of device structure to match against
 *
 * Used by a driver to check whether an of_device present in the
 * system is in its list of supported devices.
 */
const struct of_device_id * of_match_device(const struct of_device_id *matches,
					const struct of_device *dev)
{
	if (!dev->node)
		return NULL;
	while (matches->name[0] || matches->type[0] || matches->compatible[0]) {
		int match = 1;
		if (matches->name[0])
			match &= dev->node->name
				&& !strcmp(matches->name, dev->node->name);
		if (matches->type[0])
			match &= dev->node->type
				&& !strcmp(matches->type, dev->node->type);
		if (matches->compatible[0])
			match &= device_is_compatible(dev->node,
				matches->compatible);
		if (match)
			return matches;
		matches++;
	}
	return NULL;
}

static int of_platform_bus_match(struct device *dev, struct device_driver *drv)
{
	struct of_device * of_dev = to_of_device(dev);
	struct of_platform_driver * of_drv = to_of_platform_driver(drv);
	const struct of_device_id * matches = of_drv->match_table;

	if (!matches)
		return 0;

	return of_match_device(matches, of_dev) != NULL;
}

struct of_device *of_dev_get(struct of_device *dev)
{
	struct device *tmp;

	if (!dev)
		return NULL;
	tmp = get_device(&dev->dev);
	if (tmp)
		return to_of_device(tmp);
	else
		return NULL;
}

void of_dev_put(struct of_device *dev)
{
	if (dev)
		put_device(&dev->dev);
}


static int of_device_probe(struct device *dev)
{
	int error = -ENODEV;
	struct of_platform_driver *drv;
	struct of_device *of_dev;
	const struct of_device_id *match;

	drv = to_of_platform_driver(dev->driver);
	of_dev = to_of_device(dev);

	if (!drv->probe)
		return error;

	of_dev_get(of_dev);

	match = of_match_device(drv->match_table, of_dev);
	if (match)
		error = drv->probe(of_dev, match);
	if (error)
		of_dev_put(of_dev);

	return error;
}

static int of_device_remove(struct device *dev)
{
	struct of_device * of_dev = to_of_device(dev);
	struct of_platform_driver * drv = to_of_platform_driver(dev->driver);

	if (dev->driver && drv->remove)
		drv->remove(of_dev);
	return 0;
}

static int of_device_suspend(struct device *dev, pm_message_t state)
{
	struct of_device * of_dev = to_of_device(dev);
	struct of_platform_driver * drv = to_of_platform_driver(dev->driver);
	int error = 0;

	if (dev->driver && drv->suspend)
		error = drv->suspend(of_dev, state);
	return error;
}

static int of_device_resume(struct device * dev)
{
	struct of_device * of_dev = to_of_device(dev);
	struct of_platform_driver * drv = to_of_platform_driver(dev->driver);
	int error = 0;

	if (dev->driver && drv->resume)
		error = drv->resume(of_dev);
	return error;
}

struct bus_type of_platform_bus_type = {
       .name	= "of_platform",
       .match	= of_platform_bus_match,
       .suspend	= of_device_suspend,
       .resume	= of_device_resume,
};

static int __init of_bus_driver_init(void)
{
	return bus_register(&of_platform_bus_type);
}

postcore_initcall(of_bus_driver_init);

int of_register_driver(struct of_platform_driver *drv)
{
	int count = 0;

	/* initialize common driver fields */
	drv->driver.name = drv->name;
	drv->driver.bus = &of_platform_bus_type;
	drv->driver.probe = of_device_probe;
	drv->driver.remove = of_device_remove;

	/* register with core */
	count = driver_register(&drv->driver);
	return count ? count : 1;
}

void of_unregister_driver(struct of_platform_driver *drv)
{
	driver_unregister(&drv->driver);
}


static ssize_t dev_show_devspec(struct device *dev, struct device_attribute *attr, char *buf)
{
	struct of_device *ofdev;

	ofdev = to_of_device(dev);
	return sprintf(buf, "%s", ofdev->node->full_name);
}

static DEVICE_ATTR(devspec, S_IRUGO, dev_show_devspec, NULL);

/**
 * of_release_dev - free an of device structure when all users of it are finished.
 * @dev: device that's been disconnected
 *
 * Will be called only by the device core when all users of this of device are
 * done.
 */
void of_release_dev(struct device *dev)
{
	struct of_device *ofdev;

        ofdev = to_of_device(dev);
	of_node_put(ofdev->node);
	kfree(ofdev);
}

int of_device_register(struct of_device *ofdev)
{
	int rc;
	struct of_device **odprop;

	BUG_ON(ofdev->node == NULL);

	odprop = (struct of_device **)get_property(ofdev->node, "linux,device", NULL);
	if (!odprop) {
		struct property *new_prop;
	
		new_prop = kmalloc(sizeof(struct property) + sizeof(struct of_device *),
			GFP_KERNEL);
		if (new_prop == NULL)
			return -ENOMEM;
		new_prop->name = "linux,device";
		new_prop->length = sizeof(sizeof(struct of_device *));
		new_prop->value = (unsigned char *)&new_prop[1];
		odprop = (struct of_device **)new_prop->value;
		*odprop = NULL;
		prom_add_property(ofdev->node, new_prop);
	}
	*odprop = ofdev;

	rc = device_register(&ofdev->dev);
	if (rc)
		return rc;

	device_create_file(&ofdev->dev, &dev_attr_devspec);

	return 0;
}

void of_device_unregister(struct of_device *ofdev)
{
	struct of_device **odprop;

	device_remove_file(&ofdev->dev, &dev_attr_devspec);

	odprop = (struct of_device **)get_property(ofdev->node, "linux,device", NULL);
	if (odprop)
		*odprop = NULL;

	device_unregister(&ofdev->dev);
}

struct of_device* of_platform_device_create(struct device_node *np,
					    const char *bus_id,
					    struct device *parent)
{
	struct of_device *dev;
	u32 *reg;

	dev = kmalloc(sizeof(*dev), GFP_KERNEL);
	if (!dev)
		return NULL;
	memset(dev, 0, sizeof(*dev));

	dev->node = of_node_get(np);
	dev->dma_mask = 0xffffffffUL;
	dev->dev.dma_mask = &dev->dma_mask;
	dev->dev.parent = parent;
	dev->dev.bus = &of_platform_bus_type;
	dev->dev.release = of_release_dev;

	reg = (u32 *)get_property(np, "reg", NULL);
	strlcpy(dev->dev.bus_id, bus_id, BUS_ID_SIZE);

	if (of_device_register(dev) != 0) {
		kfree(dev);
		return NULL;
	}

	return dev;
}

EXPORT_SYMBOL(of_match_device);
EXPORT_SYMBOL(of_platform_bus_type);
EXPORT_SYMBOL(of_register_driver);
EXPORT_SYMBOL(of_unregister_driver);
EXPORT_SYMBOL(of_device_register);
EXPORT_SYMBOL(of_device_unregister);
EXPORT_SYMBOL(of_dev_get);
EXPORT_SYMBOL(of_dev_put);
EXPORT_SYMBOL(of_platform_device_create);
EXPORT_SYMBOL(of_release_dev);
Commit	Line	Data
1da177e4 LT	1	#include <linux/config.h>
	2	#include <linux/string.h>
	3	#include <linux/kernel.h>
	4	#include <linux/init.h>
	5	#include <linux/module.h>
5e655772	6	#include <linux/mod_devicetable.h>
4e57b681 TS	7	#include <linux/slab.h>
4e57b681 TS	8
1da177e4 LT	9	#include <asm/errno.h>
	10	#include <asm/of_device.h>
	11
	12	/**
	13	* of_match_device - Tell if an of_device structure has a matching
	14	* of_match structure
	15	* @ids: array of of device match structures to search in
	16	* @dev: the of device structure to match against
	17	*
	18	* Used by a driver to check whether an of_device present in the
	19	* system is in its list of supported devices.
	20	*/
5e655772	21	const struct of_device_id * of_match_device(const struct of_device_id *matches,
1da177e4 LT	22	const struct of_device *dev)
	23	{
	24	if (!dev->node)
	25	return NULL;
5e655772	26	while (matches->name[0] \|\| matches->type[0] \|\| matches->compatible[0]) {
1da177e4	27	int match = 1;
5e655772	28	if (matches->name[0])
1da177e4 LT	29	match &= dev->node->name
1da177e4 LT	30	&& !strcmp(matches->name, dev->node->name);
5e655772	31	if (matches->type[0])
1da177e4 LT	32	match &= dev->node->type
1da177e4 LT	33	&& !strcmp(matches->type, dev->node->type);
5e655772	34	if (matches->compatible[0])
1da177e4 LT	35	match &= device_is_compatible(dev->node,
	36	matches->compatible);
	37	if (match)
	38	return matches;
	39	matches++;
	40	}
	41	return NULL;
	42	}
	43
	44	static int of_platform_bus_match(struct device dev, struct device_driver drv)
	45	{
	46	struct of_device * of_dev = to_of_device(dev);
	47	struct of_platform_driver * of_drv = to_of_platform_driver(drv);
5e655772	48	const struct of_device_id * matches = of_drv->match_table;
1da177e4 LT	49
	50	if (!matches)
	51	return 0;
	52
	53	return of_match_device(matches, of_dev) != NULL;
	54	}
	55
	56	struct of_device of_dev_get(struct of_device dev)
	57	{
	58	struct device *tmp;
	59
	60	if (!dev)
	61	return NULL;
	62	tmp = get_device(&dev->dev);
	63	if (tmp)
	64	return to_of_device(tmp);
	65	else
	66	return NULL;
	67	}
	68
	69	void of_dev_put(struct of_device *dev)
	70	{
	71	if (dev)
	72	put_device(&dev->dev);
	73	}
	74
	75
	76	static int of_device_probe(struct device *dev)
	77	{
	78	int error = -ENODEV;
	79	struct of_platform_driver *drv;
	80	struct of_device *of_dev;
5e655772	81	const struct of_device_id *match;
1da177e4 LT	82
	83	drv = to_of_platform_driver(dev->driver);
	84	of_dev = to_of_device(dev);
	85
	86	if (!drv->probe)
	87	return error;
	88
	89	of_dev_get(of_dev);
	90
	91	match = of_match_device(drv->match_table, of_dev);
	92	if (match)
	93	error = drv->probe(of_dev, match);
	94	if (error)
	95	of_dev_put(of_dev);
	96
	97	return error;
	98	}
	99
	100	static int of_device_remove(struct device *dev)
	101	{
	102	struct of_device * of_dev = to_of_device(dev);
	103	struct of_platform_driver * drv = to_of_platform_driver(dev->driver);
	104
	105	if (dev->driver && drv->remove)
	106	drv->remove(of_dev);
	107	return 0;
	108	}
	109
ca078bae	110	static int of_device_suspend(struct device *dev, pm_message_t state)
1da177e4 LT	111	{
	112	struct of_device * of_dev = to_of_device(dev);
	113	struct of_platform_driver * drv = to_of_platform_driver(dev->driver);
	114	int error = 0;
	115
	116	if (dev->driver && drv->suspend)
	117	error = drv->suspend(of_dev, state);
	118	return error;
	119	}
	120
	121	static int of_device_resume(struct device * dev)
	122	{
	123	struct of_device * of_dev = to_of_device(dev);
	124	struct of_platform_driver * drv = to_of_platform_driver(dev->driver);
	125	int error = 0;
	126
	127	if (dev->driver && drv->resume)
	128	error = drv->resume(of_dev);
	129	return error;
	130	}
	131
	132	struct bus_type of_platform_bus_type = {
	133	.name = "of_platform",
	134	.match = of_platform_bus_match,
	135	.suspend = of_device_suspend,
	136	.resume = of_device_resume,
	137	};
	138
	139	static int __init of_bus_driver_init(void)
	140	{
	141	return bus_register(&of_platform_bus_type);
	142	}
	143
	144	postcore_initcall(of_bus_driver_init);
	145
	146	int of_register_driver(struct of_platform_driver *drv)
	147	{
	148	int count = 0;
	149
	150	/* initialize common driver fields */
	151	drv->driver.name = drv->name;
	152	drv->driver.bus = &of_platform_bus_type;
	153	drv->driver.probe = of_device_probe;
	154	drv->driver.remove = of_device_remove;
	155
	156	/* register with core */
	157	count = driver_register(&drv->driver);
	158	return count ? count : 1;
	159	}
	160
	161	void of_unregister_driver(struct of_platform_driver *drv)
	162	{
	163	driver_unregister(&drv->driver);
	164	}
	165
	166
ff381d22	167	static ssize_t dev_show_devspec(struct device dev, struct device_attribute attr, char *buf)
1da177e4 LT	168	{
	169	struct of_device *ofdev;
	170
	171	ofdev = to_of_device(dev);
	172	return sprintf(buf, "%s", ofdev->node->full_name);
	173	}
	174
	175	static DEVICE_ATTR(devspec, S_IRUGO, dev_show_devspec, NULL);
	176
	177	/**
	178	* of_release_dev - free an of device structure when all users of it are finished.
	179	* @dev: device that's been disconnected
	180	*
	181	* Will be called only by the device core when all users of this of device are
	182	* done.
	183	*/
	184	void of_release_dev(struct device *dev)
	185	{
	186	struct of_device *ofdev;
	187
	188	ofdev = to_of_device(dev);
	189	of_node_put(ofdev->node);
	190	kfree(ofdev);
	191	}
	192
	193	int of_device_register(struct of_device *ofdev)
	194	{
	195	int rc;
	196	struct of_device **odprop;
	197
	198	BUG_ON(ofdev->node == NULL);
	199
	200	odprop = (struct of_device **)get_property(ofdev->node, "linux,device", NULL);
	201	if (!odprop) {
	202	struct property *new_prop;
	203
	204	new_prop = kmalloc(sizeof(struct property) + sizeof(struct of_device *),
	205	GFP_KERNEL);
	206	if (new_prop == NULL)
	207	return -ENOMEM;
	208	new_prop->name = "linux,device";
	209	new_prop->length = sizeof(sizeof(struct of_device *));
	210	new_prop->value = (unsigned char *)&new_prop[1];
	211	odprop = (struct of_device **)new_prop->value;
	212	*odprop = NULL;
	213	prom_add_property(ofdev->node, new_prop);
	214	}
	215	*odprop = ofdev;
	216
	217	rc = device_register(&ofdev->dev);
	218	if (rc)
	219	return rc;
	220
	221	device_create_file(&ofdev->dev, &dev_attr_devspec);
	222
	223	return 0;
	224	}
	225
	226	void of_device_unregister(struct of_device *ofdev)
	227	{
	228	struct of_device **odprop;
	229
	230	device_remove_file(&ofdev->dev, &dev_attr_devspec);
	231
232	odprop = (struct of_device **)get_property(ofdev->node, "linux,device", NULL);
233	if (odprop)
234	*odprop = NULL;
235
236	device_unregister(&ofdev->dev);
237	}
238
0365ba7f BH	239	struct of_device* of_platform_device_create(struct device_node *np,
	240	const char *bus_id,
	241	struct device *parent)
1da177e4 LT	242	{
	243	struct of_device *dev;
	244	u32 *reg;
	245
	246	dev = kmalloc(sizeof(*dev), GFP_KERNEL);
	247	if (!dev)
	248	return NULL;
	249	memset(dev, 0, sizeof(*dev));
	250
	251	dev->node = of_node_get(np);
	252	dev->dma_mask = 0xffffffffUL;
	253	dev->dev.dma_mask = &dev->dma_mask;
0365ba7f	254	dev->dev.parent = parent;
1da177e4 LT	255	dev->dev.bus = &of_platform_bus_type;
	256	dev->dev.release = of_release_dev;
	257
	258	reg = (u32 *)get_property(np, "reg", NULL);
	259	strlcpy(dev->dev.bus_id, bus_id, BUS_ID_SIZE);
	260
	261	if (of_device_register(dev) != 0) {
	262	kfree(dev);
	263	return NULL;
	264	}
	265
	266	return dev;
	267	}
	268
	269	EXPORT_SYMBOL(of_match_device);
	270	EXPORT_SYMBOL(of_platform_bus_type);
	271	EXPORT_SYMBOL(of_register_driver);
	272	EXPORT_SYMBOL(of_unregister_driver);
	273	EXPORT_SYMBOL(of_device_register);
	274	EXPORT_SYMBOL(of_device_unregister);
	275	EXPORT_SYMBOL(of_dev_get);
	276	EXPORT_SYMBOL(of_dev_put);
	277	EXPORT_SYMBOL(of_platform_device_create);
	278	EXPORT_SYMBOL(of_release_dev);