Commit | Line | Data |
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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> | |
7e27780f | 13 | #include <linux/spinlock.h> |
5a0e3ad6 | 14 | #include <linux/slab.h> |
84412f62 GKH |
15 | #include <linux/usb.h> |
16 | #include "usb.h" | |
17 | ||
9bde7497 | 18 | struct ep_device { |
84412f62 GKH |
19 | struct usb_endpoint_descriptor *desc; |
20 | struct usb_device *udev; | |
9bde7497 | 21 | struct device dev; |
84412f62 | 22 | }; |
9bde7497 GKH |
23 | #define to_ep_device(_dev) \ |
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) \ |
d03f254f | 35 | static ssize_t field##_show(struct device *dev, \ |
9bde7497 GKH |
36 | struct device_attribute *attr, \ |
37 | char *buf) \ | |
84412f62 | 38 | { \ |
9bde7497 GKH |
39 | struct ep_device *ep = to_ep_device(dev); \ |
40 | return sprintf(buf, format_string, ep->desc->field); \ | |
84412f62 | 41 | } \ |
d03f254f | 42 | static DEVICE_ATTR_RO(field) |
84412f62 | 43 | |
d03f254f GKH |
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"); | |
84412f62 | 48 | |
d03f254f GKH |
49 | static ssize_t wMaxPacketSize_show(struct device *dev, |
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", |
29cc8897 | 54 | usb_endpoint_maxp(ep->desc) & 0x07ff); |
84412f62 | 55 | } |
d03f254f | 56 | static DEVICE_ATTR_RO(wMaxPacketSize); |
84412f62 | 57 | |
d03f254f GKH |
58 | static ssize_t type_show(struct device *dev, struct device_attribute *attr, |
59 | char *buf) | |
84412f62 | 60 | { |
9bde7497 | 61 | struct ep_device *ep = to_ep_device(dev); |
84412f62 GKH |
62 | char *type = "unknown"; |
63 | ||
2e0fe709 | 64 | switch (usb_endpoint_type(ep->desc)) { |
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 | } | |
d03f254f | 80 | static DEVICE_ATTR_RO(type); |
84412f62 | 81 | |
d03f254f GKH |
82 | static ssize_t interval_show(struct device *dev, struct device_attribute *attr, |
83 | 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 | |
2e0fe709 | 92 | switch (usb_endpoint_type(ep->desc)) { |
84412f62 | 93 | case USB_ENDPOINT_XFER_CONTROL: |
cd62aced | 94 | if (ep->udev->speed == USB_SPEED_HIGH) |
95 | /* uframes per NAK */ | |
9bde7497 | 96 | interval = ep->desc->bInterval; |
84412f62 | 97 | break; |
cd62aced | 98 | |
84412f62 | 99 | case USB_ENDPOINT_XFER_ISOC: |
9bde7497 | 100 | interval = 1 << (ep->desc->bInterval - 1); |
84412f62 | 101 | break; |
cd62aced | 102 | |
84412f62 | 103 | case USB_ENDPOINT_XFER_BULK: |
cd62aced | 104 | if (ep->udev->speed == USB_SPEED_HIGH && !in) |
105 | /* uframes per NAK */ | |
9bde7497 | 106 | interval = ep->desc->bInterval; |
84412f62 | 107 | break; |
cd62aced | 108 | |
84412f62 | 109 | case USB_ENDPOINT_XFER_INT: |
9bde7497 GKH |
110 | if (ep->udev->speed == USB_SPEED_HIGH) |
111 | interval = 1 << (ep->desc->bInterval - 1); | |
84412f62 | 112 | else |
9bde7497 | 113 | interval = ep->desc->bInterval; |
84412f62 GKH |
114 | break; |
115 | } | |
9bde7497 | 116 | interval *= (ep->udev->speed == USB_SPEED_HIGH) ? 125 : 1000; |
84412f62 GKH |
117 | if (interval % 1000) |
118 | unit = 'u'; | |
119 | else { | |
120 | unit = 'm'; | |
121 | interval /= 1000; | |
122 | } | |
123 | ||
124 | return sprintf(buf, "%d%cs\n", interval, unit); | |
125 | } | |
d03f254f | 126 | static DEVICE_ATTR_RO(interval); |
84412f62 | 127 | |
d03f254f GKH |
128 | static ssize_t direction_show(struct device *dev, struct device_attribute *attr, |
129 | char *buf) | |
84412f62 | 130 | { |
9bde7497 | 131 | struct ep_device *ep = to_ep_device(dev); |
84412f62 GKH |
132 | char *direction; |
133 | ||
2e0fe709 | 134 | if (usb_endpoint_xfer_control(ep->desc)) |
84412f62 | 135 | direction = "both"; |
2e0fe709 | 136 | else if (usb_endpoint_dir_in(ep->desc)) |
84412f62 GKH |
137 | direction = "in"; |
138 | else | |
139 | direction = "out"; | |
140 | return sprintf(buf, "%s\n", direction); | |
141 | } | |
d03f254f | 142 | static DEVICE_ATTR_RO(direction); |
9bde7497 GKH |
143 | |
144 | static struct attribute *ep_dev_attrs[] = { | |
145 | &dev_attr_bLength.attr, | |
146 | &dev_attr_bEndpointAddress.attr, | |
147 | &dev_attr_bmAttributes.attr, | |
148 | &dev_attr_bInterval.attr, | |
149 | &dev_attr_wMaxPacketSize.attr, | |
150 | &dev_attr_interval.attr, | |
151 | &dev_attr_type.attr, | |
152 | &dev_attr_direction.attr, | |
84412f62 GKH |
153 | NULL, |
154 | }; | |
9bde7497 GKH |
155 | static struct attribute_group ep_dev_attr_grp = { |
156 | .attrs = ep_dev_attrs, | |
157 | }; | |
a4dbd674 | 158 | static const struct attribute_group *ep_dev_groups[] = { |
2e5f10e4 AS |
159 | &ep_dev_attr_grp, |
160 | NULL | |
161 | }; | |
84412f62 | 162 | |
9bde7497 GKH |
163 | static void ep_device_release(struct device *dev) |
164 | { | |
165 | struct ep_device *ep_dev = to_ep_device(dev); | |
84412f62 | 166 | |
9bde7497 GKH |
167 | kfree(ep_dev); |
168 | } | |
84412f62 | 169 | |
2d366846 LT |
170 | struct device_type usb_ep_device_type = { |
171 | .name = "usb_endpoint", | |
172 | .release = ep_device_release, | |
173 | }; | |
174 | ||
3b23dd6f | 175 | int usb_create_ep_devs(struct device *parent, |
1b21d5e1 GKH |
176 | struct usb_host_endpoint *endpoint, |
177 | struct usb_device *udev) | |
84412f62 | 178 | { |
9bde7497 | 179 | struct ep_device *ep_dev; |
9bde7497 GKH |
180 | int retval; |
181 | ||
9bde7497 GKH |
182 | ep_dev = kzalloc(sizeof(*ep_dev), GFP_KERNEL); |
183 | if (!ep_dev) { | |
184 | retval = -ENOMEM; | |
55129666 | 185 | goto exit; |
7e27780f | 186 | } |
84412f62 | 187 | |
9bde7497 GKH |
188 | ep_dev->desc = &endpoint->desc; |
189 | ep_dev->udev = udev; | |
2e5f10e4 | 190 | ep_dev->dev.groups = ep_dev_groups; |
55129666 | 191 | ep_dev->dev.type = &usb_ep_device_type; |
9bde7497 | 192 | ep_dev->dev.parent = parent; |
55129666 | 193 | dev_set_name(&ep_dev->dev, "ep_%02x", endpoint->desc.bEndpointAddress); |
84412f62 | 194 | |
9bde7497 GKH |
195 | retval = device_register(&ep_dev->dev); |
196 | if (retval) | |
55129666 | 197 | goto error_register; |
9bde7497 | 198 | |
95622712 | 199 | device_enable_async_suspend(&ep_dev->dev); |
d5477c11 | 200 | endpoint->ep_dev = ep_dev; |
1b21d5e1 GKH |
201 | return retval; |
202 | ||
d5477c11 | 203 | error_register: |
7b3a766c | 204 | put_device(&ep_dev->dev); |
d5477c11 | 205 | exit: |
1b21d5e1 | 206 | return retval; |
84412f62 GKH |
207 | } |
208 | ||
3b23dd6f | 209 | void usb_remove_ep_devs(struct usb_host_endpoint *endpoint) |
84412f62 | 210 | { |
7e27780f | 211 | struct ep_device *ep_dev = endpoint->ep_dev; |
84412f62 | 212 | |
7e27780f | 213 | if (ep_dev) { |
7e27780f | 214 | device_unregister(&ep_dev->dev); |
9bde7497 | 215 | endpoint->ep_dev = NULL; |
84412f62 GKH |
216 | } |
217 | } |