[linux-2.6-block.git] / drivers / usb / core / endpoint.c

/*
 * drivers/usb/core/endpoint.c
 *
 * (C) Copyright 2002,2004,2006 Greg Kroah-Hartman
 * (C) Copyright 2002,2004 IBM Corp.
 * (C) Copyright 2006 Novell Inc.
 *
 * Endpoint sysfs stuff
 *
 */

#include <linux/kernel.h>
#include <linux/usb.h>
#include "usb.h"

/* endpoint stuff */

struct ep_device {
	struct usb_endpoint_descriptor *desc;
	struct usb_device *udev;
	struct device dev;
};
#define to_ep_device(_dev) \
	container_of(_dev, struct ep_device, dev)

struct ep_attribute {
	struct attribute attr;
	ssize_t (*show)(struct usb_device *,
			struct usb_endpoint_descriptor *, char *);
};
#define to_ep_attribute(_attr) \
	container_of(_attr, struct ep_attribute, attr)

#define usb_ep_attr(field, format_string)			\
static ssize_t show_ep_##field(struct device *dev,		\
			       struct device_attribute *attr,	\
			       char *buf)			\
{								\
	struct ep_device *ep = to_ep_device(dev);		\
	return sprintf(buf, format_string, ep->desc->field);	\
}								\
static DEVICE_ATTR(field, S_IRUGO, show_ep_##field, NULL);

usb_ep_attr(bLength, "%02x\n")
usb_ep_attr(bEndpointAddress, "%02x\n")
usb_ep_attr(bmAttributes, "%02x\n")
usb_ep_attr(bInterval, "%02x\n")

static ssize_t show_ep_wMaxPacketSize(struct device *dev,
				      struct device_attribute *attr, char *buf)
{
	struct ep_device *ep = to_ep_device(dev);
	return sprintf(buf, "%04x\n",
			le16_to_cpu(ep->desc->wMaxPacketSize) & 0x07ff);
}
static DEVICE_ATTR(wMaxPacketSize, S_IRUGO, show_ep_wMaxPacketSize, NULL);

static ssize_t show_ep_type(struct device *dev, struct device_attribute *attr,
			    char *buf)
{
	struct ep_device *ep = to_ep_device(dev);
	char *type = "unknown";

	switch (ep->desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
	case USB_ENDPOINT_XFER_CONTROL:
		type = "Control";
		break;
	case USB_ENDPOINT_XFER_ISOC:
		type = "Isoc";
		break;
	case USB_ENDPOINT_XFER_BULK:
		type = "Bulk";
		break;
	case USB_ENDPOINT_XFER_INT:
		type = "Interrupt";
		break;
	}
	return sprintf(buf, "%s\n", type);
}
static DEVICE_ATTR(type, S_IRUGO, show_ep_type, NULL);

static ssize_t show_ep_interval(struct device *dev,
				struct device_attribute *attr, char *buf)
{
	struct ep_device *ep = to_ep_device(dev);
	char unit;
	unsigned interval = 0;
	unsigned in;

	in = (ep->desc->bEndpointAddress & USB_DIR_IN);

	switch (ep->desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
	case USB_ENDPOINT_XFER_CONTROL:
		if (ep->udev->speed == USB_SPEED_HIGH) 	/* uframes per NAK */
			interval = ep->desc->bInterval;
		break;
	case USB_ENDPOINT_XFER_ISOC:
		interval = 1 << (ep->desc->bInterval - 1);
		break;
	case USB_ENDPOINT_XFER_BULK:
		if (ep->udev->speed == USB_SPEED_HIGH && !in) /* uframes per NAK */
			interval = ep->desc->bInterval;
		break;
	case USB_ENDPOINT_XFER_INT:
		if (ep->udev->speed == USB_SPEED_HIGH)
			interval = 1 << (ep->desc->bInterval - 1);
		else
			interval = ep->desc->bInterval;
		break;
	}
	interval *= (ep->udev->speed == USB_SPEED_HIGH) ? 125 : 1000;
	if (interval % 1000)
		unit = 'u';
	else {
		unit = 'm';
		interval /= 1000;
	}

	return sprintf(buf, "%d%cs\n", interval, unit);
}
static DEVICE_ATTR(interval, S_IRUGO, show_ep_interval, NULL);

static ssize_t show_ep_direction(struct device *dev,
				 struct device_attribute *attr, char *buf)
{
	struct ep_device *ep = to_ep_device(dev);
	char *direction;

	if ((ep->desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
			USB_ENDPOINT_XFER_CONTROL)
		direction = "both";
	else if (ep->desc->bEndpointAddress & USB_DIR_IN)
		direction = "in";
	else
		direction = "out";
	return sprintf(buf, "%s\n", direction);
}
static DEVICE_ATTR(direction, S_IRUGO, show_ep_direction, NULL);

static struct attribute *ep_dev_attrs[] = {
	&dev_attr_bLength.attr,
	&dev_attr_bEndpointAddress.attr,
	&dev_attr_bmAttributes.attr,
	&dev_attr_bInterval.attr,
	&dev_attr_wMaxPacketSize.attr,
	&dev_attr_interval.attr,
	&dev_attr_type.attr,
	&dev_attr_direction.attr,
	NULL,
};
static struct attribute_group ep_dev_attr_grp = {
	.attrs = ep_dev_attrs,
};

static struct endpoint_class {
	struct kref kref;
	struct class *class;
} *ep_class;

static int init_endpoint_class(void)
{
	int result = 0;

	if (ep_class != NULL) {
		kref_get(&ep_class->kref);
		goto exit;
	}

	ep_class = kmalloc(sizeof(*ep_class), GFP_KERNEL);
	if (!ep_class) {
		result = -ENOMEM;
		goto exit;
	}

	kref_init(&ep_class->kref);
	ep_class->class = class_create(THIS_MODULE, "usb_endpoint");
	if (IS_ERR(ep_class->class)) {
		result = IS_ERR(ep_class->class);
		kfree(ep_class);
		ep_class = NULL;
		goto exit;
	}

exit:
	return result;
}

static void release_endpoint_class(struct kref *kref)
{
	/* Ok, we cheat as we know we only have one ep_class */
	class_destroy(ep_class->class);
	kfree(ep_class);
	ep_class = NULL;
}

static void destroy_endpoint_class(void)
{
	if (ep_class)
		kref_put(&ep_class->kref, release_endpoint_class);
}

static void ep_device_release(struct device *dev)
{
	struct ep_device *ep_dev = to_ep_device(dev);

	dev_dbg(dev, "%s called for %s\n", __FUNCTION__, dev->bus_id);
	kfree(ep_dev);
}

int usb_create_ep_files(struct device *parent,
			struct usb_host_endpoint *endpoint,
			struct usb_device *udev)
{
	char name[8];
	struct ep_device *ep_dev;
	int minor;
	int retval;

	retval = init_endpoint_class();
	if (retval)
		goto exit;

	ep_dev = kzalloc(sizeof(*ep_dev), GFP_KERNEL);
	if (!ep_dev) {
		retval = -ENOMEM;
		goto exit;
	}

	/* fun calculation to determine the minor of this endpoint */
	minor = (((udev->bus->busnum - 1) * 128) * 16) + (udev->devnum - 1);

	ep_dev->desc = &endpoint->desc;
	ep_dev->udev = udev;
	ep_dev->dev.devt = MKDEV(442, minor);	// FIXME fake number...
	ep_dev->dev.class = ep_class->class;
	ep_dev->dev.parent = parent;
	ep_dev->dev.release = ep_device_release;
	snprintf(ep_dev->dev.bus_id, BUS_ID_SIZE, "usbdev%d.%d_ep%02x",
		 udev->bus->busnum, udev->devnum,
		 endpoint->desc.bEndpointAddress);

	retval = device_register(&ep_dev->dev);
	if (retval)
		goto error;
	retval = sysfs_create_group(&ep_dev->dev.kobj, &ep_dev_attr_grp);
	if (retval)
		goto error_group;

	endpoint->ep_dev = ep_dev;

	/* create the symlink to the old-style "ep_XX" directory */
	sprintf(name, "ep_%02x", endpoint->desc.bEndpointAddress);
	retval = sysfs_create_link(&parent->kobj,
				   &endpoint->ep_dev->dev.kobj, name);
	if (retval)
		goto error_link;
exit:
	return retval;

error_link:
	sysfs_remove_group(&ep_dev->dev.kobj, &ep_dev_attr_grp);

error_group:
	device_unregister(&ep_dev->dev);
	endpoint->ep_dev = NULL;
	destroy_endpoint_class();
	return retval;
error:
	kfree(ep_dev);
	destroy_endpoint_class();
	return retval;
}

void usb_remove_ep_files(struct usb_host_endpoint *endpoint)
{

	if (endpoint->ep_dev) {
		char name[8];

		sprintf(name, "ep_%02x", endpoint->desc.bEndpointAddress);
		sysfs_remove_link(&endpoint->ep_dev->dev.parent->kobj, name);
		sysfs_remove_group(&endpoint->ep_dev->dev.kobj, &ep_dev_attr_grp);
		device_unregister(&endpoint->ep_dev->dev);
		endpoint->ep_dev = NULL;
	}
	destroy_endpoint_class();
}
Commit	Line	Data
84412f62 GKH	1	/*
	2	* drivers/usb/core/endpoint.c
	3	*
	4	* (C) Copyright 2002,2004,2006 Greg Kroah-Hartman
	5	* (C) Copyright 2002,2004 IBM Corp.
	6	* (C) Copyright 2006 Novell Inc.
	7	*
	8	* Endpoint sysfs stuff
	9	*
	10	*/
	11
	12	#include <linux/kernel.h>
	13	#include <linux/usb.h>
	14	#include "usb.h"
	15
	16	/* endpoint stuff */
9bde7497 GKH	17
9bde7497 GKH	18	struct ep_device {
84412f62 GKH	19	struct usb_endpoint_descriptor *desc;
84412f62 GKH	20	struct usb_device *udev;
9bde7497	21	struct device dev;
84412f62	22	};
9bde7497 GKH	23	#define to_ep_device(_dev) \
9bde7497 GKH	24	container_of(_dev, struct ep_device, dev)
84412f62 GKH	25
	26	struct ep_attribute {
	27	struct attribute attr;
	28	ssize_t (show)(struct usb_device ,
	29	struct usb_endpoint_descriptor , char );
	30	};
	31	#define to_ep_attribute(_attr) \
	32	container_of(_attr, struct ep_attribute, attr)
	33
84412f62	34	#define usb_ep_attr(field, format_string) \
9bde7497 GKH	35	static ssize_t show_ep_##field(struct device *dev, \
	36	struct device_attribute *attr, \
	37	char *buf) \
84412f62	38	{ \
9bde7497 GKH	39	struct ep_device *ep = to_ep_device(dev); \
9bde7497 GKH	40	return sprintf(buf, format_string, ep->desc->field); \
84412f62	41	} \
9bde7497	42	static DEVICE_ATTR(field, S_IRUGO, show_ep_##field, NULL);
84412f62 GKH	43
	44	usb_ep_attr(bLength, "%02x\n")
	45	usb_ep_attr(bEndpointAddress, "%02x\n")
	46	usb_ep_attr(bmAttributes, "%02x\n")
	47	usb_ep_attr(bInterval, "%02x\n")
	48
9bde7497 GKH	49	static ssize_t show_ep_wMaxPacketSize(struct device *dev,
9bde7497 GKH	50	struct device_attribute attr, char buf)
84412f62	51	{
9bde7497	52	struct ep_device *ep = to_ep_device(dev);
84412f62	53	return sprintf(buf, "%04x\n",
9bde7497	54	le16_to_cpu(ep->desc->wMaxPacketSize) & 0x07ff);
84412f62	55	}
9bde7497	56	static DEVICE_ATTR(wMaxPacketSize, S_IRUGO, show_ep_wMaxPacketSize, NULL);
84412f62	57
9bde7497 GKH	58	static ssize_t show_ep_type(struct device dev, struct device_attribute attr,
9bde7497 GKH	59	char *buf)
84412f62	60	{
9bde7497	61	struct ep_device *ep = to_ep_device(dev);
84412f62 GKH	62	char *type = "unknown";
84412f62 GKH	63
9bde7497	64	switch (ep->desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
84412f62 GKH	65	case USB_ENDPOINT_XFER_CONTROL:
	66	type = "Control";
	67	break;
	68	case USB_ENDPOINT_XFER_ISOC:
	69	type = "Isoc";
	70	break;
	71	case USB_ENDPOINT_XFER_BULK:
	72	type = "Bulk";
	73	break;
	74	case USB_ENDPOINT_XFER_INT:
	75	type = "Interrupt";
	76	break;
	77	}
	78	return sprintf(buf, "%s\n", type);
	79	}
9bde7497	80	static DEVICE_ATTR(type, S_IRUGO, show_ep_type, NULL);
84412f62	81
9bde7497 GKH	82	static ssize_t show_ep_interval(struct device *dev,
9bde7497 GKH	83	struct device_attribute attr, char buf)
84412f62	84	{
9bde7497	85	struct ep_device *ep = to_ep_device(dev);
84412f62 GKH	86	char unit;
	87	unsigned interval = 0;
	88	unsigned in;
	89
9bde7497	90	in = (ep->desc->bEndpointAddress & USB_DIR_IN);
84412f62	91
9bde7497	92	switch (ep->desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
84412f62	93	case USB_ENDPOINT_XFER_CONTROL:
9bde7497 GKH	94	if (ep->udev->speed == USB_SPEED_HIGH) /* uframes per NAK */
9bde7497 GKH	95	interval = ep->desc->bInterval;
84412f62 GKH	96	break;
84412f62 GKH	97	case USB_ENDPOINT_XFER_ISOC:
9bde7497	98	interval = 1 << (ep->desc->bInterval - 1);
84412f62 GKH	99	break;
84412f62 GKH	100	case USB_ENDPOINT_XFER_BULK:
9bde7497 GKH	101	if (ep->udev->speed == USB_SPEED_HIGH && !in) /* uframes per NAK */
9bde7497 GKH	102	interval = ep->desc->bInterval;
84412f62 GKH	103	break;
84412f62 GKH	104	case USB_ENDPOINT_XFER_INT:
9bde7497 GKH	105	if (ep->udev->speed == USB_SPEED_HIGH)
9bde7497 GKH	106	interval = 1 << (ep->desc->bInterval - 1);
84412f62	107	else
9bde7497	108	interval = ep->desc->bInterval;
84412f62 GKH	109	break;
84412f62 GKH	110	}
9bde7497	111	interval *= (ep->udev->speed == USB_SPEED_HIGH) ? 125 : 1000;
84412f62 GKH	112	if (interval % 1000)
	113	unit = 'u';
	114	else {
	115	unit = 'm';
	116	interval /= 1000;
	117	}
	118
	119	return sprintf(buf, "%d%cs\n", interval, unit);
	120	}
9bde7497	121	static DEVICE_ATTR(interval, S_IRUGO, show_ep_interval, NULL);
84412f62	122
9bde7497 GKH	123	static ssize_t show_ep_direction(struct device *dev,
9bde7497 GKH	124	struct device_attribute attr, char buf)
84412f62	125	{
9bde7497	126	struct ep_device *ep = to_ep_device(dev);
84412f62 GKH	127	char *direction;
84412f62 GKH	128
9bde7497	129	if ((ep->desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
84412f62 GKH	130	USB_ENDPOINT_XFER_CONTROL)
84412f62 GKH	131	direction = "both";
9bde7497	132	else if (ep->desc->bEndpointAddress & USB_DIR_IN)
84412f62 GKH	133	direction = "in";
	134	else
	135	direction = "out";
	136	return sprintf(buf, "%s\n", direction);
	137	}
9bde7497 GKH	138	static DEVICE_ATTR(direction, S_IRUGO, show_ep_direction, NULL);
	139
	140	static struct attribute *ep_dev_attrs[] = {
	141	&dev_attr_bLength.attr,
	142	&dev_attr_bEndpointAddress.attr,
	143	&dev_attr_bmAttributes.attr,
	144	&dev_attr_bInterval.attr,
	145	&dev_attr_wMaxPacketSize.attr,
	146	&dev_attr_interval.attr,
	147	&dev_attr_type.attr,
	148	&dev_attr_direction.attr,
84412f62 GKH	149	NULL,
84412f62 GKH	150	};
9bde7497 GKH	151	static struct attribute_group ep_dev_attr_grp = {
	152	.attrs = ep_dev_attrs,
	153	};
84412f62	154
9bde7497 GKH	155	static struct endpoint_class {
	156	struct kref kref;
	157	struct class *class;
	158	} *ep_class;
	159
	160	static int init_endpoint_class(void)
84412f62	161	{
9bde7497 GKH	162	int result = 0;
	163
	164	if (ep_class != NULL) {
	165	kref_get(&ep_class->kref);
	166	goto exit;
	167	}
	168
	169	ep_class = kmalloc(sizeof(*ep_class), GFP_KERNEL);
	170	if (!ep_class) {
	171	result = -ENOMEM;
	172	goto exit;
	173	}
	174
	175	kref_init(&ep_class->kref);
	176	ep_class->class = class_create(THIS_MODULE, "usb_endpoint");
	177	if (IS_ERR(ep_class->class)) {
	178	result = IS_ERR(ep_class->class);
	179	kfree(ep_class);
	180	ep_class = NULL;
	181	goto exit;
	182	}
	183
	184	exit:
	185	return result;
84412f62 GKH	186	}
84412f62 GKH	187
9bde7497	188	static void release_endpoint_class(struct kref *kref)
84412f62	189	{
9bde7497 GKH	190	/* Ok, we cheat as we know we only have one ep_class */
	191	class_destroy(ep_class->class);
	192	kfree(ep_class);
	193	ep_class = NULL;
	194	}
84412f62	195
9bde7497 GKH	196	static void destroy_endpoint_class(void)
	197	{
	198	if (ep_class)
	199	kref_put(&ep_class->kref, release_endpoint_class);
84412f62 GKH	200	}
84412f62 GKH	201
9bde7497 GKH	202	static void ep_device_release(struct device *dev)
	203	{
	204	struct ep_device *ep_dev = to_ep_device(dev);
84412f62	205
9bde7497 GKH	206	dev_dbg(dev, "%s called for %s\n", __FUNCTION__, dev->bus_id);
	207	kfree(ep_dev);
	208	}
84412f62	209
1b21d5e1 GKH	210	int usb_create_ep_files(struct device *parent,
	211	struct usb_host_endpoint *endpoint,
	212	struct usb_device *udev)
84412f62	213	{
9bde7497 GKH	214	char name[8];
	215	struct ep_device *ep_dev;
	216	int minor;
	217	int retval;
	218
	219	retval = init_endpoint_class();
	220	if (retval)
	221	goto exit;
84412f62	222
9bde7497 GKH	223	ep_dev = kzalloc(sizeof(*ep_dev), GFP_KERNEL);
	224	if (!ep_dev) {
	225	retval = -ENOMEM;
	226	goto exit;
	227	}
84412f62	228
9bde7497 GKH	229	/* fun calculation to determine the minor of this endpoint */
9bde7497 GKH	230	minor = (((udev->bus->busnum - 1) * 128) * 16) + (udev->devnum - 1);
84412f62	231
9bde7497 GKH	232	ep_dev->desc = &endpoint->desc;
	233	ep_dev->udev = udev;
	234	ep_dev->dev.devt = MKDEV(442, minor); // FIXME fake number...
	235	ep_dev->dev.class = ep_class->class;
	236	ep_dev->dev.parent = parent;
	237	ep_dev->dev.release = ep_device_release;
	238	snprintf(ep_dev->dev.bus_id, BUS_ID_SIZE, "usbdev%d.%d_ep%02x",
	239	udev->bus->busnum, udev->devnum,
	240	endpoint->desc.bEndpointAddress);
84412f62	241
9bde7497 GKH	242	retval = device_register(&ep_dev->dev);
	243	if (retval)
	244	goto error;
1b21d5e1 GKH	245	retval = sysfs_create_group(&ep_dev->dev.kobj, &ep_dev_attr_grp);
	246	if (retval)
	247	goto error_group;
9bde7497 GKH	248
	249	endpoint->ep_dev = ep_dev;
	250
	251	/* create the symlink to the old-style "ep_XX" directory */
	252	sprintf(name, "ep_%02x", endpoint->desc.bEndpointAddress);
1b21d5e1 GKH	253	retval = sysfs_create_link(&parent->kobj,
	254	&endpoint->ep_dev->dev.kobj, name);
	255	if (retval)
	256	goto error_link;
9bde7497	257	exit:
1b21d5e1 GKH	258	return retval;
	259
	260	error_link:
	261	sysfs_remove_group(&ep_dev->dev.kobj, &ep_dev_attr_grp);
	262
	263	error_group:
	264	device_unregister(&ep_dev->dev);
	265	endpoint->ep_dev = NULL;
	266	destroy_endpoint_class();
	267	return retval;
9bde7497 GKH	268	error:
9bde7497 GKH	269	kfree(ep_dev);
1b21d5e1 GKH	270	destroy_endpoint_class();
1b21d5e1 GKH	271	return retval;
84412f62 GKH	272	}
	273
	274	void usb_remove_ep_files(struct usb_host_endpoint *endpoint)
	275	{
	276
9bde7497 GKH	277	if (endpoint->ep_dev) {
	278	char name[8];
	279
	280	sprintf(name, "ep_%02x", endpoint->desc.bEndpointAddress);
	281	sysfs_remove_link(&endpoint->ep_dev->dev.parent->kobj, name);
	282	sysfs_remove_group(&endpoint->ep_dev->dev.kobj, &ep_dev_attr_grp);
	283	device_unregister(&endpoint->ep_dev->dev);
	284	endpoint->ep_dev = NULL;
84412f62	285	}
9bde7497	286	destroy_endpoint_class();
84412f62 GKH	287	}
	288
	289