[net-next-2.6.git] / drivers / pnp / driver.c

/*
 * driver.c - device id matching, driver model, etc.
 *
 * Copyright 2002 Adam Belay <ambx1@neo.rr.com>
 *
 */

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

static int compare_func(const char *ida, const char *idb)
{
	int i;
	/* we only need to compare the last 4 chars */
	for (i=3; i<7; i++)
	{
		if (ida[i] != 'X' &&
		    idb[i] != 'X' &&
		    toupper(ida[i]) != toupper(idb[i]))
			return 0;
	}
	return 1;
}

int compare_pnp_id(struct pnp_id *pos, const char *id)
{
	if (!pos || !id || (strlen(id) != 7))
		return 0;
	if (memcmp(id,"ANYDEVS",7)==0)
		return 1;
	while (pos){
		if (memcmp(pos->id,id,3)==0)
			if (compare_func(pos->id,id)==1)
				return 1;
		pos = pos->next;
	}
	return 0;
}

static const struct pnp_device_id * match_device(struct pnp_driver *drv, struct pnp_dev *dev)
{
	const struct pnp_device_id *drv_id = drv->id_table;
	if (!drv_id)
		return NULL;

	while (*drv_id->id) {
		if (compare_pnp_id(dev->id, drv_id->id))
			return drv_id;
		drv_id++;
	}
	return NULL;
}

int pnp_device_attach(struct pnp_dev *pnp_dev)
{
	spin_lock(&pnp_lock);
	if(pnp_dev->status != PNP_READY){
		spin_unlock(&pnp_lock);
		return -EBUSY;
	}
	pnp_dev->status = PNP_ATTACHED;
	spin_unlock(&pnp_lock);
	return 0;
}

void pnp_device_detach(struct pnp_dev *pnp_dev)
{
	spin_lock(&pnp_lock);
	if (pnp_dev->status == PNP_ATTACHED)
		pnp_dev->status = PNP_READY;
	spin_unlock(&pnp_lock);
	pnp_disable_dev(pnp_dev);
}

static int pnp_device_probe(struct device *dev)
{
	int error;
	struct pnp_driver *pnp_drv;
	struct pnp_dev *pnp_dev;
	const struct pnp_device_id *dev_id = NULL;
	pnp_dev = to_pnp_dev(dev);
	pnp_drv = to_pnp_driver(dev->driver);

	pnp_dbg("match found with the PnP device '%s' and the driver '%s'", dev->bus_id,pnp_drv->name);

	error = pnp_device_attach(pnp_dev);
	if (error < 0)
		return error;

	if (pnp_dev->active == 0) {
		if (!(pnp_drv->flags & PNP_DRIVER_RES_DO_NOT_CHANGE)) {
			error = pnp_activate_dev(pnp_dev);
			if (error < 0)
				return error;
		}
	} else if ((pnp_drv->flags & PNP_DRIVER_RES_DISABLE)
		    == PNP_DRIVER_RES_DISABLE) {
		error = pnp_disable_dev(pnp_dev);
		if (error < 0)
			return error;
	}
	error = 0;
	if (pnp_drv->probe) {
		dev_id = match_device(pnp_drv, pnp_dev);
		if (dev_id != NULL)
			error = pnp_drv->probe(pnp_dev, dev_id);
	}
	if (error >= 0){
		pnp_dev->driver = pnp_drv;
		error = 0;
	} else
		goto fail;
	return error;

fail:
	pnp_device_detach(pnp_dev);
	return error;
}

static int pnp_device_remove(struct device *dev)
{
	struct pnp_dev * pnp_dev = to_pnp_dev(dev);
	struct pnp_driver * drv = pnp_dev->driver;

	if (drv) {
		if (drv->remove)
			drv->remove(pnp_dev);
		pnp_dev->driver = NULL;
	}
	pnp_device_detach(pnp_dev);
	return 0;
}

static int pnp_bus_match(struct device *dev, struct device_driver *drv)
{
	struct pnp_dev * pnp_dev = to_pnp_dev(dev);
	struct pnp_driver * pnp_drv = to_pnp_driver(drv);
	if (match_device(pnp_drv, pnp_dev) == NULL)
		return 0;
	return 1;
}

static int pnp_bus_suspend(struct device *dev, pm_message_t state)
{
	struct pnp_dev * pnp_dev = to_pnp_dev(dev);
	struct pnp_driver * pnp_drv = pnp_dev->driver;
	int error;

	if (!pnp_drv)
		return 0;

	if (pnp_drv->suspend) {
		error = pnp_drv->suspend(pnp_dev, state);
		if (error)
			return error;
	}

	if (!(pnp_drv->flags & PNP_DRIVER_RES_DO_NOT_CHANGE) &&
	    pnp_can_disable(pnp_dev)) {
	    	error = pnp_stop_dev(pnp_dev);
	    	if (error)
	    		return error;
	}

	return 0;
}

static int pnp_bus_resume(struct device *dev)
{
	struct pnp_dev * pnp_dev = to_pnp_dev(dev);
	struct pnp_driver * pnp_drv = pnp_dev->driver;
	int error;

	if (!pnp_drv)
		return 0;

	if (!(pnp_drv->flags & PNP_DRIVER_RES_DO_NOT_CHANGE)) {
		error = pnp_start_dev(pnp_dev);
		if (error)
			return error;
	}

	if (pnp_drv->resume)
		return pnp_drv->resume(pnp_dev);

	return 0;
}

struct bus_type pnp_bus_type = {
	.name	= "pnp",
	.match	= pnp_bus_match,
	.probe	= pnp_device_probe,
	.remove	= pnp_device_remove,
	.suspend = pnp_bus_suspend,
	.resume = pnp_bus_resume,
};

int pnp_register_driver(struct pnp_driver *drv)
{
	pnp_dbg("the driver '%s' has been registered", drv->name);

	drv->driver.name = drv->name;
	drv->driver.bus = &pnp_bus_type;

	return driver_register(&drv->driver);
}

void pnp_unregister_driver(struct pnp_driver *drv)
{
	driver_unregister(&drv->driver);
	pnp_dbg("the driver '%s' has been unregistered", drv->name);
}

/**
 * pnp_add_id - adds an EISA id to the specified device
 * @id: pointer to a pnp_id structure
 * @dev: pointer to the desired device
 *
 */

int pnp_add_id(struct pnp_id *id, struct pnp_dev *dev)
{
	struct pnp_id *ptr;
	if (!id)
		return -EINVAL;
	if (!dev)
		return -EINVAL;
	id->next = NULL;
	ptr = dev->id;
	while (ptr && ptr->next)
		ptr = ptr->next;
	if (ptr)
		ptr->next = id;
	else
		dev->id = id;
	return 0;
}

EXPORT_SYMBOL(pnp_register_driver);
EXPORT_SYMBOL(pnp_unregister_driver);
#if 0
EXPORT_SYMBOL(pnp_add_id);
#endif
EXPORT_SYMBOL(pnp_device_attach);
EXPORT_SYMBOL(pnp_device_detach);
Commit	Line	Data
1da177e4 LT	1	/*
	2	* driver.c - device id matching, driver model, etc.
	3	*
	4	* Copyright 2002 Adam Belay <ambx1@neo.rr.com>
	5	*
	6	*/
	7
1da177e4 LT	8	#include <linux/string.h>
	9	#include <linux/list.h>
	10	#include <linux/module.h>
	11	#include <linux/ctype.h>
	12	#include <linux/slab.h>
1da177e4 LT	13	#include <linux/pnp.h>
	14	#include "base.h"
	15
	16	static int compare_func(const char ida, const char idb)
	17	{
	18	int i;
	19	/* we only need to compare the last 4 chars */
	20	for (i=3; i<7; i++)
	21	{
	22	if (ida[i] != 'X' &&
	23	idb[i] != 'X' &&
	24	toupper(ida[i]) != toupper(idb[i]))
	25	return 0;
	26	}
	27	return 1;
	28	}
	29
	30	int compare_pnp_id(struct pnp_id pos, const char id)
	31	{
	32	if (!pos \|\| !id \|\| (strlen(id) != 7))
	33	return 0;
	34	if (memcmp(id,"ANYDEVS",7)==0)
	35	return 1;
	36	while (pos){
	37	if (memcmp(pos->id,id,3)==0)
	38	if (compare_func(pos->id,id)==1)
	39	return 1;
	40	pos = pos->next;
	41	}
	42	return 0;
	43	}
	44
	45	static const struct pnp_device_id * match_device(struct pnp_driver drv, struct pnp_dev dev)
	46	{
	47	const struct pnp_device_id *drv_id = drv->id_table;
	48	if (!drv_id)
	49	return NULL;
	50
	51	while (*drv_id->id) {
	52	if (compare_pnp_id(dev->id, drv_id->id))
	53	return drv_id;
	54	drv_id++;
	55	}
	56	return NULL;
	57	}
	58
	59	int pnp_device_attach(struct pnp_dev *pnp_dev)
	60	{
	61	spin_lock(&pnp_lock);
	62	if(pnp_dev->status != PNP_READY){
	63	spin_unlock(&pnp_lock);
	64	return -EBUSY;
	65	}
	66	pnp_dev->status = PNP_ATTACHED;
	67	spin_unlock(&pnp_lock);
	68	return 0;
	69	}
	70
	71	void pnp_device_detach(struct pnp_dev *pnp_dev)
	72	{
	73	spin_lock(&pnp_lock);
	74	if (pnp_dev->status == PNP_ATTACHED)
	75	pnp_dev->status = PNP_READY;
	76	spin_unlock(&pnp_lock);
77	pnp_disable_dev(pnp_dev);
78	}
79
80	static int pnp_device_probe(struct device *dev)
81	{
82	int error;
83	struct pnp_driver *pnp_drv;
84	struct pnp_dev *pnp_dev;
85	const struct pnp_device_id *dev_id = NULL;
86	pnp_dev = to_pnp_dev(dev);
87	pnp_drv = to_pnp_driver(dev->driver);
88
89	pnp_dbg("match found with the PnP device '%s' and the driver '%s'", dev->bus_id,pnp_drv->name);
90
91	error = pnp_device_attach(pnp_dev);
92	if (error < 0)
93	return error;
94
95	if (pnp_dev->active == 0) {
96	if (!(pnp_drv->flags & PNP_DRIVER_RES_DO_NOT_CHANGE)) {
97	error = pnp_activate_dev(pnp_dev);
98	if (error < 0)
99	return error;
100	}
101	} else if ((pnp_drv->flags & PNP_DRIVER_RES_DISABLE)
102	== PNP_DRIVER_RES_DISABLE) {
103	error = pnp_disable_dev(pnp_dev);
104	if (error < 0)
105	return error;
106	}
107	error = 0;
108	if (pnp_drv->probe) {
109	dev_id = match_device(pnp_drv, pnp_dev);
110	if (dev_id != NULL)
111	error = pnp_drv->probe(pnp_dev, dev_id);
112	}
113	if (error >= 0){
114	pnp_dev->driver = pnp_drv;
115	error = 0;
116	} else
117	goto fail;
118	return error;
119
120	fail:
121	pnp_device_detach(pnp_dev);
122	return error;
123	}
124
125	static int pnp_device_remove(struct device *dev)
126	{
127	struct pnp_dev * pnp_dev = to_pnp_dev(dev);
128	struct pnp_driver * drv = pnp_dev->driver;
129
130	if (drv) {
131	if (drv->remove)
132	drv->remove(pnp_dev);
133	pnp_dev->driver = NULL;
134	}
135	pnp_device_detach(pnp_dev);
136	return 0;
137	}
138
139	static int pnp_bus_match(struct device dev, struct device_driver drv)
140	{
141	struct pnp_dev * pnp_dev = to_pnp_dev(dev);
142	struct pnp_driver * pnp_drv = to_pnp_driver(drv);
143	if (match_device(pnp_drv, pnp_dev) == NULL)
144	return 0;
145	return 1;
146	}
147
4c98cfef TI	148	static int pnp_bus_suspend(struct device *dev, pm_message_t state)
	149	{
	150	struct pnp_dev * pnp_dev = to_pnp_dev(dev);
	151	struct pnp_driver * pnp_drv = pnp_dev->driver;
68094e32 PO	152	int error;
	153
	154	if (!pnp_drv)
	155	return 0;
	156
	157	if (pnp_drv->suspend) {
	158	error = pnp_drv->suspend(pnp_dev, state);
	159	if (error)
	160	return error;
	161	}
	162
	163	if (!(pnp_drv->flags & PNP_DRIVER_RES_DO_NOT_CHANGE) &&
	164	pnp_can_disable(pnp_dev)) {
	165	error = pnp_stop_dev(pnp_dev);
	166	if (error)
	167	return error;
	168	}
4c98cfef	169
4c98cfef TI	170	return 0;
	171	}
	172
68094e32	173	static int pnp_bus_resume(struct device *dev)
4c98cfef TI	174	{
	175	struct pnp_dev * pnp_dev = to_pnp_dev(dev);
	176	struct pnp_driver * pnp_drv = pnp_dev->driver;
68094e32 PO	177	int error;
	178
	179	if (!pnp_drv)
	180	return 0;
	181
	182	if (!(pnp_drv->flags & PNP_DRIVER_RES_DO_NOT_CHANGE)) {
	183	error = pnp_start_dev(pnp_dev);
	184	if (error)
	185	return error;
	186	}
4c98cfef	187
68094e32 PO	188	if (pnp_drv->resume)
	189	return pnp_drv->resume(pnp_dev);
	190
	191	return 0;
4c98cfef	192	}
1da177e4 LT	193
	194	struct bus_type pnp_bus_type = {
	195	.name = "pnp",
	196	.match = pnp_bus_match,
4681fc32 RK	197	.probe = pnp_device_probe,
4681fc32 RK	198	.remove = pnp_device_remove,
4c98cfef TI	199	.suspend = pnp_bus_suspend,
4c98cfef TI	200	.resume = pnp_bus_resume,
1da177e4 LT	201	};
1da177e4 LT	202
1da177e4 LT	203	int pnp_register_driver(struct pnp_driver *drv)
1da177e4 LT	204	{
1da177e4 LT	205	pnp_dbg("the driver '%s' has been registered", drv->name);
	206
	207	drv->driver.name = drv->name;
	208	drv->driver.bus = &pnp_bus_type;
1da177e4	209
982c6094	210	return driver_register(&drv->driver);
1da177e4 LT	211	}
	212
	213	void pnp_unregister_driver(struct pnp_driver *drv)
	214	{
	215	driver_unregister(&drv->driver);
	216	pnp_dbg("the driver '%s' has been unregistered", drv->name);
	217	}
	218
	219	/**
	220	* pnp_add_id - adds an EISA id to the specified device
	221	* @id: pointer to a pnp_id structure
	222	* @dev: pointer to the desired device
	223	*
	224	*/
	225
	226	int pnp_add_id(struct pnp_id id, struct pnp_dev dev)
	227	{
	228	struct pnp_id *ptr;
	229	if (!id)
	230	return -EINVAL;
	231	if (!dev)
	232	return -EINVAL;
	233	id->next = NULL;
	234	ptr = dev->id;
	235	while (ptr && ptr->next)
	236	ptr = ptr->next;
	237	if (ptr)
	238	ptr->next = id;
	239	else
	240	dev->id = id;
	241	return 0;
	242	}
	243
	244	EXPORT_SYMBOL(pnp_register_driver);
	245	EXPORT_SYMBOL(pnp_unregister_driver);
b449f63c	246	#if 0
1da177e4	247	EXPORT_SYMBOL(pnp_add_id);
b449f63c	248	#endif
1da177e4 LT	249	EXPORT_SYMBOL(pnp_device_attach);
1da177e4 LT	250	EXPORT_SYMBOL(pnp_device_detach);