[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / pnp / core.c

/*
 * core.c - contains all core device and protocol registration functions
 *
 * Copyright 2002 Adam Belay <ambx1@neo.rr.com>
 */

#include <linux/pnp.h>
#include <linux/types.h>
#include <linux/list.h>
#include <linux/device.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/string.h>
#include <linux/slab.h>
#include <linux/errno.h>
#include <linux/dma-mapping.h>

#include "base.h"

static LIST_HEAD(pnp_protocols);
LIST_HEAD(pnp_global);
DEFINE_SPINLOCK(pnp_lock);

/*
 * ACPI or PNPBIOS should tell us about all platform devices, so we can
 * skip some blind probes.  ISAPNP typically enumerates only plug-in ISA
 * devices, not built-in things like COM ports.
 */
int pnp_platform_devices;
EXPORT_SYMBOL(pnp_platform_devices);

void *pnp_alloc(long size)
{
	void *result;

	result = kzalloc(size, GFP_KERNEL);
	if (!result) {
		printk(KERN_ERR "pnp: Out of Memory\n");
		return NULL;
	}
	return result;
}

/**
 * pnp_protocol_register - adds a pnp protocol to the pnp layer
 * @protocol: pointer to the corresponding pnp_protocol structure
 *
 *  Ex protocols: ISAPNP, PNPBIOS, etc
 */
int pnp_register_protocol(struct pnp_protocol *protocol)
{
	int nodenum;
	struct list_head *pos;

	INIT_LIST_HEAD(&protocol->devices);
	INIT_LIST_HEAD(&protocol->cards);
	nodenum = 0;
	spin_lock(&pnp_lock);

	/* assign the lowest unused number */
	list_for_each(pos, &pnp_protocols) {
		struct pnp_protocol *cur = to_pnp_protocol(pos);
		if (cur->number == nodenum) {
			pos = &pnp_protocols;
			nodenum++;
		}
	}

	list_add_tail(&protocol->protocol_list, &pnp_protocols);
	spin_unlock(&pnp_lock);

	protocol->number = nodenum;
	dev_set_name(&protocol->dev, "pnp%d", nodenum);
	return device_register(&protocol->dev);
}

/**
 * pnp_protocol_unregister - removes a pnp protocol from the pnp layer
 * @protocol: pointer to the corresponding pnp_protocol structure
 */
void pnp_unregister_protocol(struct pnp_protocol *protocol)
{
	spin_lock(&pnp_lock);
	list_del(&protocol->protocol_list);
	spin_unlock(&pnp_lock);
	device_unregister(&protocol->dev);
}

static void pnp_free_ids(struct pnp_dev *dev)
{
	struct pnp_id *id;
	struct pnp_id *next;

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

void pnp_free_resource(struct pnp_resource *pnp_res)
{
	list_del(&pnp_res->list);
	kfree(pnp_res);
}

void pnp_free_resources(struct pnp_dev *dev)
{
	struct pnp_resource *pnp_res, *tmp;

	list_for_each_entry_safe(pnp_res, tmp, &dev->resources, list) {
		pnp_free_resource(pnp_res);
	}
}

static void pnp_release_device(struct device *dmdev)
{
	struct pnp_dev *dev = to_pnp_dev(dmdev);

	pnp_free_ids(dev);
	pnp_free_resources(dev);
	pnp_free_options(dev);
	kfree(dev);
}

struct pnp_dev *pnp_alloc_dev(struct pnp_protocol *protocol, int id,
			      const char *pnpid)
{
	struct pnp_dev *dev;
	struct pnp_id *dev_id;

	dev = kzalloc(sizeof(struct pnp_dev), GFP_KERNEL);
	if (!dev)
		return NULL;

	INIT_LIST_HEAD(&dev->resources);
	INIT_LIST_HEAD(&dev->options);
	dev->protocol = protocol;
	dev->number = id;
	dev->dma_mask = DMA_BIT_MASK(24);

	dev->dev.parent = &dev->protocol->dev;
	dev->dev.bus = &pnp_bus_type;
	dev->dev.dma_mask = &dev->dma_mask;
	dev->dev.coherent_dma_mask = dev->dma_mask;
	dev->dev.release = &pnp_release_device;

	dev_set_name(&dev->dev, "%02x:%02x", dev->protocol->number, dev->number);

	dev_id = pnp_add_id(dev, pnpid);
	if (!dev_id) {
		kfree(dev);
		return NULL;
	}

	return dev;
}

int __pnp_add_device(struct pnp_dev *dev)
{
	pnp_fixup_device(dev);
	dev->status = PNP_READY;
	spin_lock(&pnp_lock);
	list_add_tail(&dev->global_list, &pnp_global);
	list_add_tail(&dev->protocol_list, &dev->protocol->devices);
	spin_unlock(&pnp_lock);
	if (dev->protocol->can_wakeup)
		device_set_wakeup_capable(&dev->dev,
				dev->protocol->can_wakeup(dev));
	return device_register(&dev->dev);
}

/*
 * pnp_add_device - adds a pnp device to the pnp layer
 * @dev: pointer to dev to add
 *
 *  adds to driver model, name database, fixups, interface, etc.
 */
int pnp_add_device(struct pnp_dev *dev)
{
	int ret;
	char buf[128];
	int len = 0;
	struct pnp_id *id;

	if (dev->card)
		return -EINVAL;

	ret = __pnp_add_device(dev);
	if (ret)
		return ret;

	buf[0] = '\0';
	for (id = dev->id; id; id = id->next)
		len += scnprintf(buf + len, sizeof(buf) - len, " %s", id->id);

	dev_printk(KERN_DEBUG, &dev->dev, "%s device, IDs%s (%s)\n",
		   dev->protocol->name, buf,
		   dev->active ? "active" : "disabled");
	return 0;
}

void __pnp_remove_device(struct pnp_dev *dev)
{
	spin_lock(&pnp_lock);
	list_del(&dev->global_list);
	list_del(&dev->protocol_list);
	spin_unlock(&pnp_lock);
	device_unregister(&dev->dev);
}

static int __init pnp_init(void)
{
	return bus_register(&pnp_bus_type);
}

subsys_initcall(pnp_init);

int pnp_debug;

#if defined(CONFIG_PNP_DEBUG_MESSAGES)
module_param_named(debug, pnp_debug, int, 0644);
#endif
Commit	Line	Data
1da177e4 LT	1	/*
	2	* core.c - contains all core device and protocol registration functions
	3	*
	4	* Copyright 2002 Adam Belay <ambx1@neo.rr.com>
1da177e4 LT	5	*/
	6
	7	#include <linux/pnp.h>
	8	#include <linux/types.h>
	9	#include <linux/list.h>
	10	#include <linux/device.h>
	11	#include <linux/module.h>
	12	#include <linux/init.h>
	13	#include <linux/string.h>
	14	#include <linux/slab.h>
	15	#include <linux/errno.h>
2e17c550	16	#include <linux/dma-mapping.h>
1da177e4 LT	17
	18	#include "base.h"
	19
1da177e4 LT	20	static LIST_HEAD(pnp_protocols);
	21	LIST_HEAD(pnp_global);
	22	DEFINE_SPINLOCK(pnp_lock);
	23
8f81dd14 BH	24	/*
	25	* ACPI or PNPBIOS should tell us about all platform devices, so we can
	26	* skip some blind probes. ISAPNP typically enumerates only plug-in ISA
	27	* devices, not built-in things like COM ports.
	28	*/
	29	int pnp_platform_devices;
	30	EXPORT_SYMBOL(pnp_platform_devices);
	31
1da177e4 LT	32	void *pnp_alloc(long size)
	33	{
	34	void *result;
	35
dd00cc48	36	result = kzalloc(size, GFP_KERNEL);
9dd78466	37	if (!result) {
1da177e4 LT	38	printk(KERN_ERR "pnp: Out of Memory\n");
	39	return NULL;
	40	}
1da177e4 LT	41	return result;
	42	}
	43
	44	/**
	45	* pnp_protocol_register - adds a pnp protocol to the pnp layer
	46	* @protocol: pointer to the corresponding pnp_protocol structure
	47	*
	48	* Ex protocols: ISAPNP, PNPBIOS, etc
	49	*/
1da177e4 LT	50	int pnp_register_protocol(struct pnp_protocol *protocol)
	51	{
	52	int nodenum;
9dd78466	53	struct list_head *pos;
1da177e4	54
1da177e4 LT	55	INIT_LIST_HEAD(&protocol->devices);
	56	INIT_LIST_HEAD(&protocol->cards);
	57	nodenum = 0;
	58	spin_lock(&pnp_lock);
	59
	60	/* assign the lowest unused number */
9dd78466 BH	61	list_for_each(pos, &pnp_protocols) {
	62	struct pnp_protocol *cur = to_pnp_protocol(pos);
	63	if (cur->number == nodenum) {
1da177e4 LT	64	pos = &pnp_protocols;
	65	nodenum++;
	66	}
	67	}
	68
	69	list_add_tail(&protocol->protocol_list, &pnp_protocols);
	70	spin_unlock(&pnp_lock);
	71
	72	protocol->number = nodenum;
c85e37c5	73	dev_set_name(&protocol->dev, "pnp%d", nodenum);
1da177e4 LT	74	return device_register(&protocol->dev);
	75	}
	76
	77	/**
	78	* pnp_protocol_unregister - removes a pnp protocol from the pnp layer
	79	* @protocol: pointer to the corresponding pnp_protocol structure
1da177e4 LT	80	*/
	81	void pnp_unregister_protocol(struct pnp_protocol *protocol)
	82	{
	83	spin_lock(&pnp_lock);
	84	list_del(&protocol->protocol_list);
	85	spin_unlock(&pnp_lock);
	86	device_unregister(&protocol->dev);
	87	}
	88
1da177e4 LT	89	static void pnp_free_ids(struct pnp_dev *dev)
1da177e4 LT	90	{
9dd78466 BH	91	struct pnp_id *id;
9dd78466 BH	92	struct pnp_id *next;
07d4e9af	93
1da177e4 LT	94	id = dev->id;
	95	while (id) {
	96	next = id->next;
	97	kfree(id);
	98	id = next;
	99	}
	100	}
	101
aee3ad81 BH	102	void pnp_free_resource(struct pnp_resource *pnp_res)
	103	{
	104	list_del(&pnp_res->list);
	105	kfree(pnp_res);
	106	}
	107
	108	void pnp_free_resources(struct pnp_dev *dev)
	109	{
	110	struct pnp_resource pnp_res, tmp;
	111
	112	list_for_each_entry_safe(pnp_res, tmp, &dev->resources, list) {
	113	pnp_free_resource(pnp_res);
	114	}
	115	}
	116
1da177e4 LT	117	static void pnp_release_device(struct device *dmdev)
1da177e4 LT	118	{
9dd78466	119	struct pnp_dev *dev = to_pnp_dev(dmdev);
07d4e9af	120
1da177e4	121	pnp_free_ids(dev);
aee3ad81	122	pnp_free_resources(dev);
1f32ca31	123	pnp_free_options(dev);
1da177e4 LT	124	kfree(dev);
	125	}
	126
620e112c TR	127	struct pnp_dev pnp_alloc_dev(struct pnp_protocol protocol, int id,
620e112c TR	128	const char *pnpid)
1da177e4	129	{
bda1e4e5 BH	130	struct pnp_dev *dev;
bda1e4e5 BH	131	struct pnp_id *dev_id;
07d4e9af	132
bda1e4e5 BH	133	dev = kzalloc(sizeof(struct pnp_dev), GFP_KERNEL);
	134	if (!dev)
	135	return NULL;
	136
aee3ad81	137	INIT_LIST_HEAD(&dev->resources);
1f32ca31	138	INIT_LIST_HEAD(&dev->options);
bda1e4e5 BH	139	dev->protocol = protocol;
bda1e4e5 BH	140	dev->number = id;
2f4f27d4	141	dev->dma_mask = DMA_BIT_MASK(24);
bda1e4e5 BH	142
bda1e4e5 BH	143	dev->dev.parent = &dev->protocol->dev;
1da177e4	144	dev->dev.bus = &pnp_bus_type;
2e17c550	145	dev->dev.dma_mask = &dev->dma_mask;
bda1e4e5	146	dev->dev.coherent_dma_mask = dev->dma_mask;
1da177e4	147	dev->dev.release = &pnp_release_device;
bda1e4e5	148
c85e37c5	149	dev_set_name(&dev->dev, "%02x:%02x", dev->protocol->number, dev->number);
bda1e4e5 BH	150
	151	dev_id = pnp_add_id(dev, pnpid);
	152	if (!dev_id) {
	153	kfree(dev);
	154	return NULL;
	155	}
	156
	157	return dev;
	158	}
	159
	160	int __pnp_add_device(struct pnp_dev *dev)
	161	{
bda1e4e5	162	pnp_fixup_device(dev);
1da177e4 LT	163	dev->status = PNP_READY;
	164	spin_lock(&pnp_lock);
	165	list_add_tail(&dev->global_list, &pnp_global);
	166	list_add_tail(&dev->protocol_list, &dev->protocol->devices);
	167	spin_unlock(&pnp_lock);
b14e033e AS	168	if (dev->protocol->can_wakeup)
	169	device_set_wakeup_capable(&dev->dev,
	170	dev->protocol->can_wakeup(dev));
8a89efd1	171	return device_register(&dev->dev);
1da177e4 LT	172	}
	173
	174	/*
	175	* pnp_add_device - adds a pnp device to the pnp layer
	176	* @dev: pointer to dev to add
	177	*
	178	* adds to driver model, name database, fixups, interface, etc.
	179	*/
1da177e4 LT	180	int pnp_add_device(struct pnp_dev *dev)
1da177e4 LT	181	{
348366b9	182	int ret;
2663f60d BH	183	char buf[128];
	184	int len = 0;
	185	struct pnp_id *id;
348366b9	186
b1734913	187	if (dev->card)
1da177e4	188	return -EINVAL;
348366b9	189
348366b9 BH	190	ret = __pnp_add_device(dev);
	191	if (ret)
	192	return ret;
	193
2663f60d BH	194	buf[0] = '\0';
	195	for (id = dev->id; id; id = id->next)
	196	len += scnprintf(buf + len, sizeof(buf) - len, " %s", id->id);
348366b9	197
c1f3f281 BH	198	dev_printk(KERN_DEBUG, &dev->dev, "%s device, IDs%s (%s)\n",
	199	dev->protocol->name, buf,
	200	dev->active ? "active" : "disabled");
348366b9	201	return 0;
1da177e4 LT	202	}
	203
	204	void __pnp_remove_device(struct pnp_dev *dev)
	205	{
	206	spin_lock(&pnp_lock);
	207	list_del(&dev->global_list);
	208	list_del(&dev->protocol_list);
	209	spin_unlock(&pnp_lock);
	210	device_unregister(&dev->dev);
	211	}
	212
1da177e4 LT	213	static int __init pnp_init(void)
1da177e4 LT	214	{
1da177e4 LT	215	return bus_register(&pnp_bus_type);
	216	}
	217
	218	subsys_initcall(pnp_init);
97ef062b BH	219
	220	int pnp_debug;
	221
	222	#if defined(CONFIG_PNP_DEBUG_MESSAGES)
cdefba03	223	module_param_named(debug, pnp_debug, int, 0644);
97ef062b	224	#endif