[linux-2.6-block.git] / drivers / zorro / zorro-driver.c

/*
 *  Zorro Driver Services
 *
 *  Copyright (C) 2003 Geert Uytterhoeven
 *
 *  Loosely based on drivers/pci/pci-driver.c
 *
 *  This file is subject to the terms and conditions of the GNU General Public
 *  License.  See the file COPYING in the main directory of this archive
 *  for more details.
 */

#include <linux/init.h>
#include <linux/module.h>
#include <linux/zorro.h>

#include "zorro.h"


    /**
     *  zorro_match_device - Tell if a Zorro device structure has a matching
     *                       Zorro device id structure
     *  @ids: array of Zorro device id structures to search in
     *  @dev: the Zorro device structure to match against
     *
     *  Used by a driver to check whether a Zorro device present in the
     *  system is in its list of supported devices. Returns the matching
     *  zorro_device_id structure or %NULL if there is no match.
     */

static const struct zorro_device_id *
zorro_match_device(const struct zorro_device_id *ids,
		   const struct zorro_dev *z)
{
	while (ids->id) {
		if (ids->id == ZORRO_WILDCARD || ids->id == z->id)
			return ids;
		ids++;
	}
	return NULL;
}


static int zorro_device_probe(struct device *dev)
{
	int error = 0;
	struct zorro_driver *drv = to_zorro_driver(dev->driver);
	struct zorro_dev *z = to_zorro_dev(dev);

	if (!z->driver && drv->probe) {
		const struct zorro_device_id *id;

		id = zorro_match_device(drv->id_table, z);
		if (id)
			error = drv->probe(z, id);
		if (error >= 0) {
			z->driver = drv;
			error = 0;
		}
	}
	return error;
}


static void zorro_device_remove(struct device *dev)
{
	struct zorro_dev *z = to_zorro_dev(dev);
	struct zorro_driver *drv = to_zorro_driver(dev->driver);

	if (drv->remove)
		drv->remove(z);
	z->driver = NULL;
}


    /**
     *  zorro_register_driver - register a new Zorro driver
     *  @drv: the driver structure to register
     *
     *  Adds the driver structure to the list of registered drivers
     *  Returns zero or a negative error value.
     */

int zorro_register_driver(struct zorro_driver *drv)
{
	/* initialize common driver fields */
	drv->driver.name = drv->name;
	drv->driver.bus = &zorro_bus_type;

	/* register with core */
	return driver_register(&drv->driver);
}
EXPORT_SYMBOL(zorro_register_driver);


    /**
     *  zorro_unregister_driver - unregister a zorro driver
     *  @drv: the driver structure to unregister
     *
     *  Deletes the driver structure from the list of registered Zorro drivers,
     *  gives it a chance to clean up by calling its remove() function for
     *  each device it was responsible for, and marks those devices as
     *  driverless.
     */

void zorro_unregister_driver(struct zorro_driver *drv)
{
	driver_unregister(&drv->driver);
}
EXPORT_SYMBOL(zorro_unregister_driver);


    /**
     *  zorro_bus_match - Tell if a Zorro device structure has a matching Zorro
     *                    device id structure
     *  @ids: array of Zorro device id structures to search in
     *  @dev: the Zorro device structure to match against
     *
     *  Used by the driver core to check whether a Zorro device present in the
     *  system is in a driver's list of supported devices.  Returns 1 if
     *  supported, and 0 if there is no match.
     */

static int zorro_bus_match(struct device *dev, struct device_driver *drv)
{
	struct zorro_dev *z = to_zorro_dev(dev);
	struct zorro_driver *zorro_drv = to_zorro_driver(drv);
	const struct zorro_device_id *ids = zorro_drv->id_table;

	if (!ids)
		return 0;

	return !!zorro_match_device(ids, z);
}

static int zorro_uevent(struct device *dev, struct kobj_uevent_env *env)
{
	struct zorro_dev *z;

	if (!dev)
		return -ENODEV;

	z = to_zorro_dev(dev);
	if (!z)
		return -ENODEV;

	if (add_uevent_var(env, "ZORRO_ID=%08X", z->id) ||
	    add_uevent_var(env, "ZORRO_SLOT_NAME=%s", dev_name(dev)) ||
	    add_uevent_var(env, "ZORRO_SLOT_ADDR=%04X", z->slotaddr) ||
	    add_uevent_var(env, "MODALIAS=" ZORRO_DEVICE_MODALIAS_FMT, z->id))
		return -ENOMEM;

	return 0;
}

struct bus_type zorro_bus_type = {
	.name		= "zorro",
	.dev_name	= "zorro",
	.dev_groups	= zorro_device_attribute_groups,
	.match		= zorro_bus_match,
	.uevent		= zorro_uevent,
	.probe		= zorro_device_probe,
	.remove		= zorro_device_remove,
};
EXPORT_SYMBOL(zorro_bus_type);


static int __init zorro_driver_init(void)
{
	return bus_register(&zorro_bus_type);
}

postcore_initcall(zorro_driver_init);
Commit	Line	Data
1da177e4 LT	1	/*
	2	* Zorro Driver Services
	3	*
	4	* Copyright (C) 2003 Geert Uytterhoeven
	5	*
	6	* Loosely based on drivers/pci/pci-driver.c
	7	*
	8	* This file is subject to the terms and conditions of the GNU General Public
	9	* License. See the file COPYING in the main directory of this archive
	10	* for more details.
	11	*/
	12
	13	#include <linux/init.h>
	14	#include <linux/module.h>
	15	#include <linux/zorro.h>
	16
87e715de DT	17	#include "zorro.h"
87e715de DT	18
1da177e4 LT	19
	20	/**
	21	* zorro_match_device - Tell if a Zorro device structure has a matching
	22	* Zorro device id structure
	23	* @ids: array of Zorro device id structures to search in
	24	* @dev: the Zorro device structure to match against
	25	*
	26	* Used by a driver to check whether a Zorro device present in the
	27	* system is in its list of supported devices. Returns the matching
	28	* zorro_device_id structure or %NULL if there is no match.
	29	*/
	30
0cfb07c5	31	static const struct zorro_device_id *
1da177e4 LT	32	zorro_match_device(const struct zorro_device_id *ids,
	33	const struct zorro_dev *z)
	34	{
	35	while (ids->id) {
	36	if (ids->id == ZORRO_WILDCARD \|\| ids->id == z->id)
	37	return ids;
	38	ids++;
	39	}
	40	return NULL;
	41	}
	42
	43
	44	static int zorro_device_probe(struct device *dev)
	45	{
	46	int error = 0;
	47	struct zorro_driver *drv = to_zorro_driver(dev->driver);
	48	struct zorro_dev *z = to_zorro_dev(dev);
	49
	50	if (!z->driver && drv->probe) {
	51	const struct zorro_device_id *id;
	52
	53	id = zorro_match_device(drv->id_table, z);
	54	if (id)
	55	error = drv->probe(z, id);
	56	if (error >= 0) {
	57	z->driver = drv;
	58	error = 0;
	59	}
	60	}
	61	return error;
	62	}
	63
	64
fc7a6209	65	static void zorro_device_remove(struct device *dev)
2f9b0b5e GU	66	{
	67	struct zorro_dev *z = to_zorro_dev(dev);
	68	struct zorro_driver *drv = to_zorro_driver(dev->driver);
	69
18d214cc UKK	70	if (drv->remove)
	71	drv->remove(z);
	72	z->driver = NULL;
2f9b0b5e GU	73	}
	74
	75
1da177e4 LT	76	/**
	77	* zorro_register_driver - register a new Zorro driver
	78	* @drv: the driver structure to register
	79	*
	80	* Adds the driver structure to the list of registered drivers
33d8675e	81	* Returns zero or a negative error value.
1da177e4 LT	82	*/
	83
	84	int zorro_register_driver(struct zorro_driver *drv)
	85	{
1da177e4 LT	86	/* initialize common driver fields */
	87	drv->driver.name = drv->name;
	88	drv->driver.bus = &zorro_bus_type;
1da177e4 LT	89
1da177e4 LT	90	/* register with core */
33d8675e	91	return driver_register(&drv->driver);
1da177e4	92	}
d996e9dc	93	EXPORT_SYMBOL(zorro_register_driver);
1da177e4 LT	94
	95
	96	/**
	97	* zorro_unregister_driver - unregister a zorro driver
	98	* @drv: the driver structure to unregister
	99	*
	100	* Deletes the driver structure from the list of registered Zorro drivers,
	101	* gives it a chance to clean up by calling its remove() function for
	102	* each device it was responsible for, and marks those devices as
	103	* driverless.
	104	*/
	105
	106	void zorro_unregister_driver(struct zorro_driver *drv)
	107	{
	108	driver_unregister(&drv->driver);
	109	}
d996e9dc	110	EXPORT_SYMBOL(zorro_unregister_driver);
1da177e4 LT	111
	112
	113	/**
	114	* zorro_bus_match - Tell if a Zorro device structure has a matching Zorro
	115	* device id structure
	116	* @ids: array of Zorro device id structures to search in
	117	* @dev: the Zorro device structure to match against
	118	*
aeee094d GU	119	* Used by the driver core to check whether a Zorro device present in the
	120	* system is in a driver's list of supported devices. Returns 1 if
	121	* supported, and 0 if there is no match.
1da177e4 LT	122	*/
	123
	124	static int zorro_bus_match(struct device dev, struct device_driver drv)
	125	{
	126	struct zorro_dev *z = to_zorro_dev(dev);
	127	struct zorro_driver *zorro_drv = to_zorro_driver(drv);
	128	const struct zorro_device_id *ids = zorro_drv->id_table;
	129
	130	if (!ids)
	131	return 0;
	132
3d52910e	133	return !!zorro_match_device(ids, z);
1da177e4 LT	134	}
1da177e4 LT	135
bf54a2b3 GU	136	static int zorro_uevent(struct device dev, struct kobj_uevent_env env)
bf54a2b3 GU	137	{
bf54a2b3 GU	138	struct zorro_dev *z;
	139
	140	if (!dev)
	141	return -ENODEV;
	142
	143	z = to_zorro_dev(dev);
	144	if (!z)
	145	return -ENODEV;
	146
	147	if (add_uevent_var(env, "ZORRO_ID=%08X", z->id) \|\|
	148	add_uevent_var(env, "ZORRO_SLOT_NAME=%s", dev_name(dev)) \|\|
	149	add_uevent_var(env, "ZORRO_SLOT_ADDR=%04X", z->slotaddr) \|\|
	150	add_uevent_var(env, "MODALIAS=" ZORRO_DEVICE_MODALIAS_FMT, z->id))
	151	return -ENOMEM;
	152
	153	return 0;
bf54a2b3	154	}
1da177e4 LT	155
1da177e4 LT	156	struct bus_type zorro_bus_type = {
87e715de DT	157	.name = "zorro",
	158	.dev_name = "zorro",
	159	.dev_groups = zorro_device_attribute_groups,
	160	.match = zorro_bus_match,
	161	.uevent = zorro_uevent,
	162	.probe = zorro_device_probe,
	163	.remove = zorro_device_remove,
1da177e4	164	};
d996e9dc	165	EXPORT_SYMBOL(zorro_bus_type);
1da177e4 LT	166
	167
	168	static int __init zorro_driver_init(void)
	169	{
	170	return bus_register(&zorro_bus_type);
	171	}
	172
	173	postcore_initcall(zorro_driver_init);
	174