2 * drivers/usb/core/endpoint.c
4 * (C) Copyright 2002,2004,2006 Greg Kroah-Hartman
5 * (C) Copyright 2002,2004 IBM Corp.
6 * (C) Copyright 2006 Novell Inc.
12 #include <linux/kernel.h>
13 #include <linux/spinlock.h>
14 #include <linux/slab.h>
15 #include <linux/idr.h>
16 #include <linux/usb.h>
20 struct usb_endpoint_descriptor
*desc
;
21 struct usb_device
*udev
;
24 #define to_ep_device(_dev) \
25 container_of(_dev, struct ep_device, dev)
28 struct attribute attr
;
29 ssize_t (*show
)(struct usb_device
*,
30 struct usb_endpoint_descriptor
*, char *);
32 #define to_ep_attribute(_attr) \
33 container_of(_attr, struct ep_attribute, attr)
35 #define usb_ep_attr(field, format_string) \
36 static ssize_t show_ep_##field(struct device *dev, \
37 struct device_attribute *attr, \
40 struct ep_device *ep = to_ep_device(dev); \
41 return sprintf(buf, format_string, ep->desc->field); \
43 static DEVICE_ATTR(field, S_IRUGO, show_ep_##field, NULL);
45 usb_ep_attr(bLength
, "%02x\n")
46 usb_ep_attr(bEndpointAddress
, "%02x\n")
47 usb_ep_attr(bmAttributes
, "%02x\n")
48 usb_ep_attr(bInterval
, "%02x\n")
50 static ssize_t
show_ep_wMaxPacketSize(struct device
*dev
,
51 struct device_attribute
*attr
, char *buf
)
53 struct ep_device
*ep
= to_ep_device(dev
);
54 return sprintf(buf
, "%04x\n",
55 usb_endpoint_maxp(ep
->desc
) & 0x07ff);
57 static DEVICE_ATTR(wMaxPacketSize
, S_IRUGO
, show_ep_wMaxPacketSize
, NULL
);
59 static ssize_t
show_ep_type(struct device
*dev
, struct device_attribute
*attr
,
62 struct ep_device
*ep
= to_ep_device(dev
);
63 char *type
= "unknown";
65 switch (usb_endpoint_type(ep
->desc
)) {
66 case USB_ENDPOINT_XFER_CONTROL
:
69 case USB_ENDPOINT_XFER_ISOC
:
72 case USB_ENDPOINT_XFER_BULK
:
75 case USB_ENDPOINT_XFER_INT
:
79 return sprintf(buf
, "%s\n", type
);
81 static DEVICE_ATTR(type
, S_IRUGO
, show_ep_type
, NULL
);
83 static ssize_t
show_ep_interval(struct device
*dev
,
84 struct device_attribute
*attr
, char *buf
)
86 struct ep_device
*ep
= to_ep_device(dev
);
88 unsigned interval
= 0;
91 in
= (ep
->desc
->bEndpointAddress
& USB_DIR_IN
);
93 switch (usb_endpoint_type(ep
->desc
)) {
94 case USB_ENDPOINT_XFER_CONTROL
:
95 if (ep
->udev
->speed
== USB_SPEED_HIGH
)
97 interval
= ep
->desc
->bInterval
;
100 case USB_ENDPOINT_XFER_ISOC
:
101 interval
= 1 << (ep
->desc
->bInterval
- 1);
104 case USB_ENDPOINT_XFER_BULK
:
105 if (ep
->udev
->speed
== USB_SPEED_HIGH
&& !in
)
106 /* uframes per NAK */
107 interval
= ep
->desc
->bInterval
;
110 case USB_ENDPOINT_XFER_INT
:
111 if (ep
->udev
->speed
== USB_SPEED_HIGH
)
112 interval
= 1 << (ep
->desc
->bInterval
- 1);
114 interval
= ep
->desc
->bInterval
;
117 interval
*= (ep
->udev
->speed
== USB_SPEED_HIGH
) ? 125 : 1000;
125 return sprintf(buf
, "%d%cs\n", interval
, unit
);
127 static DEVICE_ATTR(interval
, S_IRUGO
, show_ep_interval
, NULL
);
129 static ssize_t
show_ep_direction(struct device
*dev
,
130 struct device_attribute
*attr
, char *buf
)
132 struct ep_device
*ep
= to_ep_device(dev
);
135 if (usb_endpoint_xfer_control(ep
->desc
))
137 else if (usb_endpoint_dir_in(ep
->desc
))
141 return sprintf(buf
, "%s\n", direction
);
143 static DEVICE_ATTR(direction
, S_IRUGO
, show_ep_direction
, NULL
);
145 static struct attribute
*ep_dev_attrs
[] = {
146 &dev_attr_bLength
.attr
,
147 &dev_attr_bEndpointAddress
.attr
,
148 &dev_attr_bmAttributes
.attr
,
149 &dev_attr_bInterval
.attr
,
150 &dev_attr_wMaxPacketSize
.attr
,
151 &dev_attr_interval
.attr
,
153 &dev_attr_direction
.attr
,
156 static struct attribute_group ep_dev_attr_grp
= {
157 .attrs
= ep_dev_attrs
,
159 static const struct attribute_group
*ep_dev_groups
[] = {
164 static void ep_device_release(struct device
*dev
)
166 struct ep_device
*ep_dev
= to_ep_device(dev
);
171 struct device_type usb_ep_device_type
= {
172 .name
= "usb_endpoint",
173 .release
= ep_device_release
,
176 int usb_create_ep_devs(struct device
*parent
,
177 struct usb_host_endpoint
*endpoint
,
178 struct usb_device
*udev
)
180 struct ep_device
*ep_dev
;
183 ep_dev
= kzalloc(sizeof(*ep_dev
), GFP_KERNEL
);
189 ep_dev
->desc
= &endpoint
->desc
;
191 ep_dev
->dev
.groups
= ep_dev_groups
;
192 ep_dev
->dev
.type
= &usb_ep_device_type
;
193 ep_dev
->dev
.parent
= parent
;
194 dev_set_name(&ep_dev
->dev
, "ep_%02x", endpoint
->desc
.bEndpointAddress
);
196 retval
= device_register(&ep_dev
->dev
);
200 device_enable_async_suspend(&ep_dev
->dev
);
201 endpoint
->ep_dev
= ep_dev
;
205 put_device(&ep_dev
->dev
);
210 void usb_remove_ep_devs(struct usb_host_endpoint
*endpoint
)
212 struct ep_device
*ep_dev
= endpoint
->ep_dev
;
215 device_unregister(&ep_dev
->dev
);
216 endpoint
->ep_dev
= NULL
;