[GitHub/mt8127/android_kernel_alcatel_ttab.git] / net / bluetooth / hci_sysfs.c

/* Bluetooth HCI driver model support. */

#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/debugfs.h>
#include <linux/seq_file.h>

#include <net/bluetooth/bluetooth.h>
#include <net/bluetooth/hci_core.h>

static struct class *bt_class;

struct dentry *bt_debugfs = NULL;
EXPORT_SYMBOL_GPL(bt_debugfs);

static struct workqueue_struct *bt_workq;

static inline char *link_typetostr(int type)
{
	switch (type) {
	case ACL_LINK:
		return "ACL";
	case SCO_LINK:
		return "SCO";
	case ESCO_LINK:
		return "eSCO";
	default:
		return "UNKNOWN";
	}
}

static ssize_t show_link_type(struct device *dev, struct device_attribute *attr, char *buf)
{
	struct hci_conn *conn = dev_get_drvdata(dev);
	return sprintf(buf, "%s\n", link_typetostr(conn->type));
}

static ssize_t show_link_address(struct device *dev, struct device_attribute *attr, char *buf)
{
	struct hci_conn *conn = dev_get_drvdata(dev);
	bdaddr_t bdaddr;
	baswap(&bdaddr, &conn->dst);
	return sprintf(buf, "%s\n", batostr(&bdaddr));
}

static ssize_t show_link_features(struct device *dev, struct device_attribute *attr, char *buf)
{
	struct hci_conn *conn = dev_get_drvdata(dev);

	return sprintf(buf, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
				conn->features[0], conn->features[1],
				conn->features[2], conn->features[3],
				conn->features[4], conn->features[5],
				conn->features[6], conn->features[7]);
}

#define LINK_ATTR(_name,_mode,_show,_store) \
struct device_attribute link_attr_##_name = __ATTR(_name,_mode,_show,_store)

static LINK_ATTR(type, S_IRUGO, show_link_type, NULL);
static LINK_ATTR(address, S_IRUGO, show_link_address, NULL);
static LINK_ATTR(features, S_IRUGO, show_link_features, NULL);

static struct attribute *bt_link_attrs[] = {
	&link_attr_type.attr,
	&link_attr_address.attr,
	&link_attr_features.attr,
	NULL
};

static struct attribute_group bt_link_group = {
	.attrs = bt_link_attrs,
};

static const struct attribute_group *bt_link_groups[] = {
	&bt_link_group,
	NULL
};

static void bt_link_release(struct device *dev)
{
	void *data = dev_get_drvdata(dev);
	kfree(data);
}

static struct device_type bt_link = {
	.name    = "link",
	.groups  = bt_link_groups,
	.release = bt_link_release,
};

static void add_conn(struct work_struct *work)
{
	struct hci_conn *conn = container_of(work, struct hci_conn, work_add);
	struct hci_dev *hdev = conn->hdev;

	dev_set_name(&conn->dev, "%s:%d", hdev->name, conn->handle);

	dev_set_drvdata(&conn->dev, conn);

	if (device_add(&conn->dev) < 0) {
		BT_ERR("Failed to register connection device");
		return;
	}

	hci_dev_hold(hdev);
}

/*
 * The rfcomm tty device will possibly retain even when conn
 * is down, and sysfs doesn't support move zombie device,
 * so we should move the device before conn device is destroyed.
 */
static int __match_tty(struct device *dev, void *data)
{
	return !strncmp(dev_name(dev), "rfcomm", 6);
}

static void del_conn(struct work_struct *work)
{
	struct hci_conn *conn = container_of(work, struct hci_conn, work_del);
	struct hci_dev *hdev = conn->hdev;

	if (!device_is_registered(&conn->dev))
		return;

	while (1) {
		struct device *dev;

		dev = device_find_child(&conn->dev, NULL, __match_tty);
		if (!dev)
			break;
		device_move(dev, NULL, DPM_ORDER_DEV_LAST);
		put_device(dev);
	}

	device_del(&conn->dev);
	put_device(&conn->dev);

	hci_dev_put(hdev);
}

void hci_conn_init_sysfs(struct hci_conn *conn)
{
	struct hci_dev *hdev = conn->hdev;

	BT_DBG("conn %p", conn);

	conn->dev.type = &bt_link;
	conn->dev.class = bt_class;
	conn->dev.parent = &hdev->dev;

	device_initialize(&conn->dev);

	INIT_WORK(&conn->work_add, add_conn);
	INIT_WORK(&conn->work_del, del_conn);
}

void hci_conn_add_sysfs(struct hci_conn *conn)
{
	BT_DBG("conn %p", conn);

	queue_work(bt_workq, &conn->work_add);
}

void hci_conn_del_sysfs(struct hci_conn *conn)
{
	BT_DBG("conn %p", conn);

	queue_work(bt_workq, &conn->work_del);
}

static inline char *host_bustostr(int bus)
{
	switch (bus) {
	case HCI_VIRTUAL:
		return "VIRTUAL";
	case HCI_USB:
		return "USB";
	case HCI_PCCARD:
		return "PCCARD";
	case HCI_UART:
		return "UART";
	case HCI_RS232:
		return "RS232";
	case HCI_PCI:
		return "PCI";
	case HCI_SDIO:
		return "SDIO";
	default:
		return "UNKNOWN";
	}
}

static inline char *host_typetostr(int type)
{
	switch (type) {
	case HCI_BREDR:
		return "BR/EDR";
	case HCI_80211:
		return "802.11";
	default:
		return "UNKNOWN";
	}
}

static ssize_t show_bus(struct device *dev, struct device_attribute *attr, char *buf)
{
	struct hci_dev *hdev = dev_get_drvdata(dev);
	return sprintf(buf, "%s\n", host_bustostr(hdev->bus));
}

static ssize_t show_type(struct device *dev, struct device_attribute *attr, char *buf)
{
	struct hci_dev *hdev = dev_get_drvdata(dev);
	return sprintf(buf, "%s\n", host_typetostr(hdev->dev_type));
}

static ssize_t show_name(struct device *dev, struct device_attribute *attr, char *buf)
{
	struct hci_dev *hdev = dev_get_drvdata(dev);
	char name[249];
	int i;

	for (i = 0; i < 248; i++)
		name[i] = hdev->dev_name[i];

	name[248] = '\0';
	return sprintf(buf, "%s\n", name);
}

static ssize_t show_class(struct device *dev, struct device_attribute *attr, char *buf)
{
	struct hci_dev *hdev = dev_get_drvdata(dev);
	return sprintf(buf, "0x%.2x%.2x%.2x\n",
			hdev->dev_class[2], hdev->dev_class[1], hdev->dev_class[0]);
}

static ssize_t show_address(struct device *dev, struct device_attribute *attr, char *buf)
{
	struct hci_dev *hdev = dev_get_drvdata(dev);
	bdaddr_t bdaddr;
	baswap(&bdaddr, &hdev->bdaddr);
	return sprintf(buf, "%s\n", batostr(&bdaddr));
}

static ssize_t show_features(struct device *dev, struct device_attribute *attr, char *buf)
{
	struct hci_dev *hdev = dev_get_drvdata(dev);

	return sprintf(buf, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
				hdev->features[0], hdev->features[1],
				hdev->features[2], hdev->features[3],
				hdev->features[4], hdev->features[5],
				hdev->features[6], hdev->features[7]);
}

static ssize_t show_manufacturer(struct device *dev, struct device_attribute *attr, char *buf)
{
	struct hci_dev *hdev = dev_get_drvdata(dev);
	return sprintf(buf, "%d\n", hdev->manufacturer);
}

static ssize_t show_hci_version(struct device *dev, struct device_attribute *attr, char *buf)
{
	struct hci_dev *hdev = dev_get_drvdata(dev);
	return sprintf(buf, "%d\n", hdev->hci_ver);
}

static ssize_t show_hci_revision(struct device *dev, struct device_attribute *attr, char *buf)
{
	struct hci_dev *hdev = dev_get_drvdata(dev);
	return sprintf(buf, "%d\n", hdev->hci_rev);
}

static ssize_t show_idle_timeout(struct device *dev, struct device_attribute *attr, char *buf)
{
	struct hci_dev *hdev = dev_get_drvdata(dev);
	return sprintf(buf, "%d\n", hdev->idle_timeout);
}

static ssize_t store_idle_timeout(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
{
	struct hci_dev *hdev = dev_get_drvdata(dev);
	char *ptr;
	__u32 val;

	val = simple_strtoul(buf, &ptr, 10);
	if (ptr == buf)
		return -EINVAL;

	if (val != 0 && (val < 500 || val > 3600000))
		return -EINVAL;

	hdev->idle_timeout = val;

	return count;
}

static ssize_t show_sniff_max_interval(struct device *dev, struct device_attribute *attr, char *buf)
{
	struct hci_dev *hdev = dev_get_drvdata(dev);
	return sprintf(buf, "%d\n", hdev->sniff_max_interval);
}

static ssize_t store_sniff_max_interval(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
{
	struct hci_dev *hdev = dev_get_drvdata(dev);
	char *ptr;
	__u16 val;

	val = simple_strtoul(buf, &ptr, 10);
	if (ptr == buf)
		return -EINVAL;

	if (val < 0x0002 || val > 0xFFFE || val % 2)
		return -EINVAL;

	if (val < hdev->sniff_min_interval)
		return -EINVAL;

	hdev->sniff_max_interval = val;

	return count;
}

static ssize_t show_sniff_min_interval(struct device *dev, struct device_attribute *attr, char *buf)
{
	struct hci_dev *hdev = dev_get_drvdata(dev);
	return sprintf(buf, "%d\n", hdev->sniff_min_interval);
}

static ssize_t store_sniff_min_interval(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
{
	struct hci_dev *hdev = dev_get_drvdata(dev);
	char *ptr;
	__u16 val;

	val = simple_strtoul(buf, &ptr, 10);
	if (ptr == buf)
		return -EINVAL;

	if (val < 0x0002 || val > 0xFFFE || val % 2)
		return -EINVAL;

	if (val > hdev->sniff_max_interval)
		return -EINVAL;

	hdev->sniff_min_interval = val;

	return count;
}

static DEVICE_ATTR(bus, S_IRUGO, show_bus, NULL);
static DEVICE_ATTR(type, S_IRUGO, show_type, NULL);
static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
static DEVICE_ATTR(class, S_IRUGO, show_class, NULL);
static DEVICE_ATTR(address, S_IRUGO, show_address, NULL);
static DEVICE_ATTR(features, S_IRUGO, show_features, NULL);
static DEVICE_ATTR(manufacturer, S_IRUGO, show_manufacturer, NULL);
static DEVICE_ATTR(hci_version, S_IRUGO, show_hci_version, NULL);
static DEVICE_ATTR(hci_revision, S_IRUGO, show_hci_revision, NULL);

static DEVICE_ATTR(idle_timeout, S_IRUGO | S_IWUSR,
				show_idle_timeout, store_idle_timeout);
static DEVICE_ATTR(sniff_max_interval, S_IRUGO | S_IWUSR,
				show_sniff_max_interval, store_sniff_max_interval);
static DEVICE_ATTR(sniff_min_interval, S_IRUGO | S_IWUSR,
				show_sniff_min_interval, store_sniff_min_interval);

static struct attribute *bt_host_attrs[] = {
	&dev_attr_bus.attr,
	&dev_attr_type.attr,
	&dev_attr_name.attr,
	&dev_attr_class.attr,
	&dev_attr_address.attr,
	&dev_attr_features.attr,
	&dev_attr_manufacturer.attr,
	&dev_attr_hci_version.attr,
	&dev_attr_hci_revision.attr,
	&dev_attr_idle_timeout.attr,
	&dev_attr_sniff_max_interval.attr,
	&dev_attr_sniff_min_interval.attr,
	NULL
};

static struct attribute_group bt_host_group = {
	.attrs = bt_host_attrs,
};

static const struct attribute_group *bt_host_groups[] = {
	&bt_host_group,
	NULL
};

static void bt_host_release(struct device *dev)
{
	void *data = dev_get_drvdata(dev);
	kfree(data);
}

static struct device_type bt_host = {
	.name    = "host",
	.groups  = bt_host_groups,
	.release = bt_host_release,
};

static int inquiry_cache_show(struct seq_file *f, void *p)
{
	struct hci_dev *hdev = f->private;
	struct inquiry_cache *cache = &hdev->inq_cache;
	struct inquiry_entry *e;

	hci_dev_lock_bh(hdev);

	for (e = cache->list; e; e = e->next) {
		struct inquiry_data *data = &e->data;
		bdaddr_t bdaddr;
		baswap(&bdaddr, &data->bdaddr);
		seq_printf(f, "%s %d %d %d 0x%.2x%.2x%.2x 0x%.4x %d %d %u\n",
			   batostr(&bdaddr),
			   data->pscan_rep_mode, data->pscan_period_mode,
			   data->pscan_mode, data->dev_class[2],
			   data->dev_class[1], data->dev_class[0],
			   __le16_to_cpu(data->clock_offset),
			   data->rssi, data->ssp_mode, e->timestamp);
	}

	hci_dev_unlock_bh(hdev);

	return 0;
}

static int inquiry_cache_open(struct inode *inode, struct file *file)
{
	return single_open(file, inquiry_cache_show, inode->i_private);
}

static const struct file_operations inquiry_cache_fops = {
	.open		= inquiry_cache_open,
	.read		= seq_read,
	.llseek		= seq_lseek,
	.release	= single_release,
};

int hci_register_sysfs(struct hci_dev *hdev)
{
	struct device *dev = &hdev->dev;
	int err;

	BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);

	dev->type = &bt_host;
	dev->class = bt_class;
	dev->parent = hdev->parent;

	dev_set_name(dev, "%s", hdev->name);

	dev_set_drvdata(dev, hdev);

	err = device_register(dev);
	if (err < 0)
		return err;

	if (!bt_debugfs)
		return 0;

	hdev->debugfs = debugfs_create_dir(hdev->name, bt_debugfs);
	if (!hdev->debugfs)
		return 0;

	debugfs_create_file("inquiry_cache", 0444, hdev->debugfs,
						hdev, &inquiry_cache_fops);

	return 0;
}

void hci_unregister_sysfs(struct hci_dev *hdev)
{
	BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);

	debugfs_remove_recursive(hdev->debugfs);

	device_del(&hdev->dev);
}

int __init bt_sysfs_init(void)
{
	bt_workq = create_singlethread_workqueue("bluetooth");
	if (!bt_workq)
		return -ENOMEM;

	bt_debugfs = debugfs_create_dir("bluetooth", NULL);

	bt_class = class_create(THIS_MODULE, "bluetooth");
	if (IS_ERR(bt_class)) {
		destroy_workqueue(bt_workq);
		return PTR_ERR(bt_class);
	}

	return 0;
}

void bt_sysfs_cleanup(void)
{
	class_destroy(bt_class);

	debugfs_remove_recursive(bt_debugfs);

	destroy_workqueue(bt_workq);
}
Commit	Line	Data
	1	/* Bluetooth HCI driver model support. */
	2
	3	#include <linux/kernel.h>
	4	#include <linux/init.h>
	5	#include <linux/debugfs.h>
	6	#include <linux/seq_file.h>
	7
	8	#include <net/bluetooth/bluetooth.h>
	9	#include <net/bluetooth/hci_core.h>
	10
	11	static struct class *bt_class;
	12
	13	struct dentry *bt_debugfs = NULL;
	14	EXPORT_SYMBOL_GPL(bt_debugfs);
	15
	16	static struct workqueue_struct *bt_workq;
	17
	18	static inline char *link_typetostr(int type)
	19	{
	20	switch (type) {
	21	case ACL_LINK:
	22	return "ACL";
	23	case SCO_LINK:
	24	return "SCO";
	25	case ESCO_LINK:
	26	return "eSCO";
	27	default:
	28	return "UNKNOWN";
	29	}
	30	}
	31
	32	static ssize_t show_link_type(struct device dev, struct device_attribute attr, char *buf)
	33	{
	34	struct hci_conn *conn = dev_get_drvdata(dev);
	35	return sprintf(buf, "%s\n", link_typetostr(conn->type));
	36	}
	37
	38	static ssize_t show_link_address(struct device dev, struct device_attribute attr, char *buf)
	39	{
	40	struct hci_conn *conn = dev_get_drvdata(dev);
	41	bdaddr_t bdaddr;
	42	baswap(&bdaddr, &conn->dst);
	43	return sprintf(buf, "%s\n", batostr(&bdaddr));
	44	}
	45
	46	static ssize_t show_link_features(struct device dev, struct device_attribute attr, char *buf)
	47	{
	48	struct hci_conn *conn = dev_get_drvdata(dev);
	49
	50	return sprintf(buf, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
	51	conn->features[0], conn->features[1],
	52	conn->features[2], conn->features[3],
	53	conn->features[4], conn->features[5],
	54	conn->features[6], conn->features[7]);
	55	}
	56
	57	#define LINK_ATTR(_name,_mode,_show,_store) \
	58	struct device_attribute link_attr_##_name = __ATTR(_name,_mode,_show,_store)
	59
	60	static LINK_ATTR(type, S_IRUGO, show_link_type, NULL);
	61	static LINK_ATTR(address, S_IRUGO, show_link_address, NULL);
	62	static LINK_ATTR(features, S_IRUGO, show_link_features, NULL);
	63
	64	static struct attribute *bt_link_attrs[] = {
	65	&link_attr_type.attr,
	66	&link_attr_address.attr,
	67	&link_attr_features.attr,
	68	NULL
	69	};
	70
	71	static struct attribute_group bt_link_group = {
	72	.attrs = bt_link_attrs,
	73	};
	74
	75	static const struct attribute_group *bt_link_groups[] = {
	76	&bt_link_group,
	77	NULL
	78	};
	79
	80	static void bt_link_release(struct device *dev)
	81	{
	82	void *data = dev_get_drvdata(dev);
	83	kfree(data);
	84	}
	85
	86	static struct device_type bt_link = {
	87	.name = "link",
	88	.groups = bt_link_groups,
	89	.release = bt_link_release,
	90	};
	91
	92	static void add_conn(struct work_struct *work)
	93	{
	94	struct hci_conn *conn = container_of(work, struct hci_conn, work_add);
	95	struct hci_dev *hdev = conn->hdev;
	96
	97	dev_set_name(&conn->dev, "%s:%d", hdev->name, conn->handle);
	98
	99	dev_set_drvdata(&conn->dev, conn);
	100
	101	if (device_add(&conn->dev) < 0) {
	102	BT_ERR("Failed to register connection device");
	103	return;
	104	}
	105
	106	hci_dev_hold(hdev);
	107	}
	108
	109	/*
	110	* The rfcomm tty device will possibly retain even when conn
	111	* is down, and sysfs doesn't support move zombie device,
	112	* so we should move the device before conn device is destroyed.
	113	*/
	114	static int __match_tty(struct device dev, void data)
	115	{
	116	return !strncmp(dev_name(dev), "rfcomm", 6);
	117	}
	118
	119	static void del_conn(struct work_struct *work)
	120	{
	121	struct hci_conn *conn = container_of(work, struct hci_conn, work_del);
	122	struct hci_dev *hdev = conn->hdev;
	123
	124	if (!device_is_registered(&conn->dev))
	125	return;
	126
	127	while (1) {
	128	struct device *dev;
	129
	130	dev = device_find_child(&conn->dev, NULL, __match_tty);
	131	if (!dev)
	132	break;
	133	device_move(dev, NULL, DPM_ORDER_DEV_LAST);
	134	put_device(dev);
	135	}
	136
	137	device_del(&conn->dev);
	138	put_device(&conn->dev);
	139
	140	hci_dev_put(hdev);
	141	}
	142
	143	void hci_conn_init_sysfs(struct hci_conn *conn)
	144	{
	145	struct hci_dev *hdev = conn->hdev;
	146
	147	BT_DBG("conn %p", conn);
	148
	149	conn->dev.type = &bt_link;
	150	conn->dev.class = bt_class;
	151	conn->dev.parent = &hdev->dev;
	152
	153	device_initialize(&conn->dev);
	154
	155	INIT_WORK(&conn->work_add, add_conn);
	156	INIT_WORK(&conn->work_del, del_conn);
	157	}
	158
	159	void hci_conn_add_sysfs(struct hci_conn *conn)
	160	{
	161	BT_DBG("conn %p", conn);
	162
	163	queue_work(bt_workq, &conn->work_add);
	164	}
	165
	166	void hci_conn_del_sysfs(struct hci_conn *conn)
	167	{
	168	BT_DBG("conn %p", conn);
	169
	170	queue_work(bt_workq, &conn->work_del);
	171	}
	172
	173	static inline char *host_bustostr(int bus)
	174	{
	175	switch (bus) {
	176	case HCI_VIRTUAL:
	177	return "VIRTUAL";
	178	case HCI_USB:
	179	return "USB";
	180	case HCI_PCCARD:
	181	return "PCCARD";
	182	case HCI_UART:
	183	return "UART";
	184	case HCI_RS232:
	185	return "RS232";
	186	case HCI_PCI:
	187	return "PCI";
	188	case HCI_SDIO:
	189	return "SDIO";
	190	default:
	191	return "UNKNOWN";
	192	}
	193	}
	194
	195	static inline char *host_typetostr(int type)
	196	{
	197	switch (type) {
	198	case HCI_BREDR:
	199	return "BR/EDR";
	200	case HCI_80211:
	201	return "802.11";
	202	default:
	203	return "UNKNOWN";
	204	}
	205	}
	206
	207	static ssize_t show_bus(struct device dev, struct device_attribute attr, char *buf)
	208	{
	209	struct hci_dev *hdev = dev_get_drvdata(dev);
	210	return sprintf(buf, "%s\n", host_bustostr(hdev->bus));
	211	}
	212
	213	static ssize_t show_type(struct device dev, struct device_attribute attr, char *buf)
	214	{
	215	struct hci_dev *hdev = dev_get_drvdata(dev);
	216	return sprintf(buf, "%s\n", host_typetostr(hdev->dev_type));
	217	}
	218
	219	static ssize_t show_name(struct device dev, struct device_attribute attr, char *buf)
	220	{
	221	struct hci_dev *hdev = dev_get_drvdata(dev);
	222	char name[249];
	223	int i;
	224
	225	for (i = 0; i < 248; i++)
	226	name[i] = hdev->dev_name[i];
	227
	228	name[248] = '\0';
	229	return sprintf(buf, "%s\n", name);
	230	}
	231
	232	static ssize_t show_class(struct device dev, struct device_attribute attr, char *buf)
	233	{
	234	struct hci_dev *hdev = dev_get_drvdata(dev);
	235	return sprintf(buf, "0x%.2x%.2x%.2x\n",
	236	hdev->dev_class[2], hdev->dev_class[1], hdev->dev_class[0]);
	237	}
	238
	239	static ssize_t show_address(struct device dev, struct device_attribute attr, char *buf)
	240	{
	241	struct hci_dev *hdev = dev_get_drvdata(dev);
	242	bdaddr_t bdaddr;
	243	baswap(&bdaddr, &hdev->bdaddr);
	244	return sprintf(buf, "%s\n", batostr(&bdaddr));
	245	}
	246
	247	static ssize_t show_features(struct device dev, struct device_attribute attr, char *buf)
	248	{
	249	struct hci_dev *hdev = dev_get_drvdata(dev);
	250
	251	return sprintf(buf, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
	252	hdev->features[0], hdev->features[1],
	253	hdev->features[2], hdev->features[3],
	254	hdev->features[4], hdev->features[5],
	255	hdev->features[6], hdev->features[7]);
	256	}
	257
	258	static ssize_t show_manufacturer(struct device dev, struct device_attribute attr, char *buf)
	259	{
	260	struct hci_dev *hdev = dev_get_drvdata(dev);
	261	return sprintf(buf, "%d\n", hdev->manufacturer);
	262	}
	263
	264	static ssize_t show_hci_version(struct device dev, struct device_attribute attr, char *buf)
	265	{
	266	struct hci_dev *hdev = dev_get_drvdata(dev);
	267	return sprintf(buf, "%d\n", hdev->hci_ver);
	268	}
	269
	270	static ssize_t show_hci_revision(struct device dev, struct device_attribute attr, char *buf)
	271	{
	272	struct hci_dev *hdev = dev_get_drvdata(dev);
	273	return sprintf(buf, "%d\n", hdev->hci_rev);
	274	}
	275
	276	static ssize_t show_idle_timeout(struct device dev, struct device_attribute attr, char *buf)
	277	{
	278	struct hci_dev *hdev = dev_get_drvdata(dev);
	279	return sprintf(buf, "%d\n", hdev->idle_timeout);
	280	}
	281
	282	static ssize_t store_idle_timeout(struct device dev, struct device_attribute attr, const char *buf, size_t count)
	283	{
	284	struct hci_dev *hdev = dev_get_drvdata(dev);
	285	char *ptr;
	286	__u32 val;
	287
	288	val = simple_strtoul(buf, &ptr, 10);
	289	if (ptr == buf)
	290	return -EINVAL;
	291
	292	if (val != 0 && (val < 500 \|\| val > 3600000))
	293	return -EINVAL;
	294
	295	hdev->idle_timeout = val;
	296
	297	return count;
	298	}
	299
	300	static ssize_t show_sniff_max_interval(struct device dev, struct device_attribute attr, char *buf)
	301	{
	302	struct hci_dev *hdev = dev_get_drvdata(dev);
	303	return sprintf(buf, "%d\n", hdev->sniff_max_interval);
	304	}
	305
	306	static ssize_t store_sniff_max_interval(struct device dev, struct device_attribute attr, const char *buf, size_t count)
	307	{
	308	struct hci_dev *hdev = dev_get_drvdata(dev);
	309	char *ptr;
	310	__u16 val;
	311
	312	val = simple_strtoul(buf, &ptr, 10);
	313	if (ptr == buf)
	314	return -EINVAL;
	315
	316	if (val < 0x0002 \|\| val > 0xFFFE \|\| val % 2)
	317	return -EINVAL;
	318
	319	if (val < hdev->sniff_min_interval)
	320	return -EINVAL;
	321
	322	hdev->sniff_max_interval = val;
	323
	324	return count;
	325	}
	326
	327	static ssize_t show_sniff_min_interval(struct device dev, struct device_attribute attr, char *buf)
	328	{
	329	struct hci_dev *hdev = dev_get_drvdata(dev);
	330	return sprintf(buf, "%d\n", hdev->sniff_min_interval);
	331	}
	332
	333	static ssize_t store_sniff_min_interval(struct device dev, struct device_attribute attr, const char *buf, size_t count)
	334	{
	335	struct hci_dev *hdev = dev_get_drvdata(dev);
	336	char *ptr;
	337	__u16 val;
	338
	339	val = simple_strtoul(buf, &ptr, 10);
	340	if (ptr == buf)
	341	return -EINVAL;
	342
	343	if (val < 0x0002 \|\| val > 0xFFFE \|\| val % 2)
	344	return -EINVAL;
	345
	346	if (val > hdev->sniff_max_interval)
	347	return -EINVAL;
	348
	349	hdev->sniff_min_interval = val;
	350
	351	return count;
	352	}
	353
	354	static DEVICE_ATTR(bus, S_IRUGO, show_bus, NULL);
	355	static DEVICE_ATTR(type, S_IRUGO, show_type, NULL);
	356	static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
	357	static DEVICE_ATTR(class, S_IRUGO, show_class, NULL);
	358	static DEVICE_ATTR(address, S_IRUGO, show_address, NULL);
	359	static DEVICE_ATTR(features, S_IRUGO, show_features, NULL);
	360	static DEVICE_ATTR(manufacturer, S_IRUGO, show_manufacturer, NULL);
	361	static DEVICE_ATTR(hci_version, S_IRUGO, show_hci_version, NULL);
	362	static DEVICE_ATTR(hci_revision, S_IRUGO, show_hci_revision, NULL);
	363
	364	static DEVICE_ATTR(idle_timeout, S_IRUGO \| S_IWUSR,
	365	show_idle_timeout, store_idle_timeout);
	366	static DEVICE_ATTR(sniff_max_interval, S_IRUGO \| S_IWUSR,
	367	show_sniff_max_interval, store_sniff_max_interval);
	368	static DEVICE_ATTR(sniff_min_interval, S_IRUGO \| S_IWUSR,
	369	show_sniff_min_interval, store_sniff_min_interval);
	370
	371	static struct attribute *bt_host_attrs[] = {
	372	&dev_attr_bus.attr,
	373	&dev_attr_type.attr,
	374	&dev_attr_name.attr,
	375	&dev_attr_class.attr,
	376	&dev_attr_address.attr,
	377	&dev_attr_features.attr,
	378	&dev_attr_manufacturer.attr,
	379	&dev_attr_hci_version.attr,
	380	&dev_attr_hci_revision.attr,
	381	&dev_attr_idle_timeout.attr,
	382	&dev_attr_sniff_max_interval.attr,
	383	&dev_attr_sniff_min_interval.attr,
	384	NULL
	385	};
	386
	387	static struct attribute_group bt_host_group = {
	388	.attrs = bt_host_attrs,
	389	};
	390
	391	static const struct attribute_group *bt_host_groups[] = {
	392	&bt_host_group,
	393	NULL
	394	};
	395
	396	static void bt_host_release(struct device *dev)
	397	{
	398	void *data = dev_get_drvdata(dev);
	399	kfree(data);
	400	}
	401
	402	static struct device_type bt_host = {
	403	.name = "host",
	404	.groups = bt_host_groups,
	405	.release = bt_host_release,
	406	};
	407
	408	static int inquiry_cache_show(struct seq_file f, void p)
	409	{
	410	struct hci_dev *hdev = f->private;
	411	struct inquiry_cache *cache = &hdev->inq_cache;
	412	struct inquiry_entry *e;
	413
	414	hci_dev_lock_bh(hdev);
	415
	416	for (e = cache->list; e; e = e->next) {
	417	struct inquiry_data *data = &e->data;
	418	bdaddr_t bdaddr;
	419	baswap(&bdaddr, &data->bdaddr);
	420	seq_printf(f, "%s %d %d %d 0x%.2x%.2x%.2x 0x%.4x %d %d %u\n",
	421	batostr(&bdaddr),
	422	data->pscan_rep_mode, data->pscan_period_mode,
	423	data->pscan_mode, data->dev_class[2],
	424	data->dev_class[1], data->dev_class[0],
	425	__le16_to_cpu(data->clock_offset),
	426	data->rssi, data->ssp_mode, e->timestamp);
	427	}
	428
	429	hci_dev_unlock_bh(hdev);
	430
	431	return 0;
	432	}
	433
	434	static int inquiry_cache_open(struct inode inode, struct file file)
	435	{
	436	return single_open(file, inquiry_cache_show, inode->i_private);
	437	}
	438
	439	static const struct file_operations inquiry_cache_fops = {
	440	.open = inquiry_cache_open,
	441	.read = seq_read,
	442	.llseek = seq_lseek,
	443	.release = single_release,
	444	};
	445
	446	int hci_register_sysfs(struct hci_dev *hdev)
	447	{
	448	struct device *dev = &hdev->dev;
	449	int err;
	450
	451	BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
	452
	453	dev->type = &bt_host;
	454	dev->class = bt_class;
	455	dev->parent = hdev->parent;
	456
	457	dev_set_name(dev, "%s", hdev->name);
	458
	459	dev_set_drvdata(dev, hdev);
	460
	461	err = device_register(dev);
	462	if (err < 0)
	463	return err;
	464
	465	if (!bt_debugfs)
	466	return 0;
	467
	468	hdev->debugfs = debugfs_create_dir(hdev->name, bt_debugfs);
	469	if (!hdev->debugfs)
	470	return 0;
	471
	472	debugfs_create_file("inquiry_cache", 0444, hdev->debugfs,
	473	hdev, &inquiry_cache_fops);
	474
	475	return 0;
	476	}
	477
	478	void hci_unregister_sysfs(struct hci_dev *hdev)
	479	{
	480	BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
	481
	482	debugfs_remove_recursive(hdev->debugfs);
	483
	484	device_del(&hdev->dev);
	485	}
	486
	487	int __init bt_sysfs_init(void)
	488	{
	489	bt_workq = create_singlethread_workqueue("bluetooth");
	490	if (!bt_workq)
	491	return -ENOMEM;
	492
	493	bt_debugfs = debugfs_create_dir("bluetooth", NULL);
	494
	495	bt_class = class_create(THIS_MODULE, "bluetooth");
	496	if (IS_ERR(bt_class)) {
	497	destroy_workqueue(bt_workq);
	498	return PTR_ERR(bt_class);
	499	}
	500
	501	return 0;
	502	}
	503
	504	void bt_sysfs_cleanup(void)
	505	{
	506	class_destroy(bt_class);
	507
	508	debugfs_remove_recursive(bt_debugfs);
	509
	510	destroy_workqueue(bt_workq);
	511	}