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 SB |
13 | #include <linux/spinlock.h> |
14 | #include <linux/idr.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 | 25 | |
55129666 KS |
26 | struct device_type usb_ep_device_type = { |
27 | .name = "usb_endpoint", | |
28 | }; | |
29 | ||
84412f62 GKH |
30 | struct ep_attribute { |
31 | struct attribute attr; | |
32 | ssize_t (*show)(struct usb_device *, | |
33 | struct usb_endpoint_descriptor *, char *); | |
34 | }; | |
35 | #define to_ep_attribute(_attr) \ | |
36 | container_of(_attr, struct ep_attribute, attr) | |
37 | ||
84412f62 | 38 | #define usb_ep_attr(field, format_string) \ |
9bde7497 GKH |
39 | static ssize_t show_ep_##field(struct device *dev, \ |
40 | struct device_attribute *attr, \ | |
41 | char *buf) \ | |
84412f62 | 42 | { \ |
9bde7497 GKH |
43 | struct ep_device *ep = to_ep_device(dev); \ |
44 | return sprintf(buf, format_string, ep->desc->field); \ | |
84412f62 | 45 | } \ |
9bde7497 | 46 | static DEVICE_ATTR(field, S_IRUGO, show_ep_##field, NULL); |
84412f62 GKH |
47 | |
48 | usb_ep_attr(bLength, "%02x\n") | |
49 | usb_ep_attr(bEndpointAddress, "%02x\n") | |
50 | usb_ep_attr(bmAttributes, "%02x\n") | |
51 | usb_ep_attr(bInterval, "%02x\n") | |
52 | ||
9bde7497 GKH |
53 | static ssize_t show_ep_wMaxPacketSize(struct device *dev, |
54 | struct device_attribute *attr, char *buf) | |
84412f62 | 55 | { |
9bde7497 | 56 | struct ep_device *ep = to_ep_device(dev); |
84412f62 | 57 | return sprintf(buf, "%04x\n", |
9bde7497 | 58 | le16_to_cpu(ep->desc->wMaxPacketSize) & 0x07ff); |
84412f62 | 59 | } |
9bde7497 | 60 | static DEVICE_ATTR(wMaxPacketSize, S_IRUGO, show_ep_wMaxPacketSize, NULL); |
84412f62 | 61 | |
9bde7497 GKH |
62 | static ssize_t show_ep_type(struct device *dev, struct device_attribute *attr, |
63 | char *buf) | |
84412f62 | 64 | { |
9bde7497 | 65 | struct ep_device *ep = to_ep_device(dev); |
84412f62 GKH |
66 | char *type = "unknown"; |
67 | ||
2e0fe709 | 68 | switch (usb_endpoint_type(ep->desc)) { |
84412f62 GKH |
69 | case USB_ENDPOINT_XFER_CONTROL: |
70 | type = "Control"; | |
71 | break; | |
72 | case USB_ENDPOINT_XFER_ISOC: | |
73 | type = "Isoc"; | |
74 | break; | |
75 | case USB_ENDPOINT_XFER_BULK: | |
76 | type = "Bulk"; | |
77 | break; | |
78 | case USB_ENDPOINT_XFER_INT: | |
79 | type = "Interrupt"; | |
80 | break; | |
81 | } | |
82 | return sprintf(buf, "%s\n", type); | |
83 | } | |
9bde7497 | 84 | static DEVICE_ATTR(type, S_IRUGO, show_ep_type, NULL); |
84412f62 | 85 | |
9bde7497 GKH |
86 | static ssize_t show_ep_interval(struct device *dev, |
87 | struct device_attribute *attr, char *buf) | |
84412f62 | 88 | { |
9bde7497 | 89 | struct ep_device *ep = to_ep_device(dev); |
84412f62 GKH |
90 | char unit; |
91 | unsigned interval = 0; | |
92 | unsigned in; | |
93 | ||
9bde7497 | 94 | in = (ep->desc->bEndpointAddress & USB_DIR_IN); |
84412f62 | 95 | |
2e0fe709 | 96 | switch (usb_endpoint_type(ep->desc)) { |
84412f62 | 97 | case USB_ENDPOINT_XFER_CONTROL: |
9bde7497 GKH |
98 | if (ep->udev->speed == USB_SPEED_HIGH) /* uframes per NAK */ |
99 | interval = ep->desc->bInterval; | |
84412f62 GKH |
100 | break; |
101 | case USB_ENDPOINT_XFER_ISOC: | |
9bde7497 | 102 | interval = 1 << (ep->desc->bInterval - 1); |
84412f62 GKH |
103 | break; |
104 | case USB_ENDPOINT_XFER_BULK: | |
9bde7497 GKH |
105 | if (ep->udev->speed == USB_SPEED_HIGH && !in) /* uframes per NAK */ |
106 | interval = ep->desc->bInterval; | |
84412f62 GKH |
107 | break; |
108 | case USB_ENDPOINT_XFER_INT: | |
9bde7497 GKH |
109 | if (ep->udev->speed == USB_SPEED_HIGH) |
110 | interval = 1 << (ep->desc->bInterval - 1); | |
84412f62 | 111 | else |
9bde7497 | 112 | interval = ep->desc->bInterval; |
84412f62 GKH |
113 | break; |
114 | } | |
9bde7497 | 115 | interval *= (ep->udev->speed == USB_SPEED_HIGH) ? 125 : 1000; |
84412f62 GKH |
116 | if (interval % 1000) |
117 | unit = 'u'; | |
118 | else { | |
119 | unit = 'm'; | |
120 | interval /= 1000; | |
121 | } | |
122 | ||
123 | return sprintf(buf, "%d%cs\n", interval, unit); | |
124 | } | |
9bde7497 | 125 | static DEVICE_ATTR(interval, S_IRUGO, show_ep_interval, NULL); |
84412f62 | 126 | |
9bde7497 GKH |
127 | static ssize_t show_ep_direction(struct device *dev, |
128 | struct device_attribute *attr, char *buf) | |
84412f62 | 129 | { |
9bde7497 | 130 | struct ep_device *ep = to_ep_device(dev); |
84412f62 GKH |
131 | char *direction; |
132 | ||
2e0fe709 | 133 | if (usb_endpoint_xfer_control(ep->desc)) |
84412f62 | 134 | direction = "both"; |
2e0fe709 | 135 | else if (usb_endpoint_dir_in(ep->desc)) |
84412f62 GKH |
136 | direction = "in"; |
137 | else | |
138 | direction = "out"; | |
139 | return sprintf(buf, "%s\n", direction); | |
140 | } | |
9bde7497 GKH |
141 | static DEVICE_ATTR(direction, S_IRUGO, show_ep_direction, NULL); |
142 | ||
143 | static struct attribute *ep_dev_attrs[] = { | |
144 | &dev_attr_bLength.attr, | |
145 | &dev_attr_bEndpointAddress.attr, | |
146 | &dev_attr_bmAttributes.attr, | |
147 | &dev_attr_bInterval.attr, | |
148 | &dev_attr_wMaxPacketSize.attr, | |
149 | &dev_attr_interval.attr, | |
150 | &dev_attr_type.attr, | |
151 | &dev_attr_direction.attr, | |
84412f62 GKH |
152 | NULL, |
153 | }; | |
9bde7497 GKH |
154 | static struct attribute_group ep_dev_attr_grp = { |
155 | .attrs = ep_dev_attrs, | |
156 | }; | |
2e5f10e4 AS |
157 | static struct attribute_group *ep_dev_groups[] = { |
158 | &ep_dev_attr_grp, | |
159 | NULL | |
160 | }; | |
84412f62 | 161 | |
9bde7497 GKH |
162 | static void ep_device_release(struct device *dev) |
163 | { | |
164 | struct ep_device *ep_dev = to_ep_device(dev); | |
84412f62 | 165 | |
9bde7497 GKH |
166 | kfree(ep_dev); |
167 | } | |
84412f62 | 168 | |
3b23dd6f | 169 | int usb_create_ep_devs(struct device *parent, |
1b21d5e1 GKH |
170 | struct usb_host_endpoint *endpoint, |
171 | struct usb_device *udev) | |
84412f62 | 172 | { |
9bde7497 | 173 | struct ep_device *ep_dev; |
9bde7497 GKH |
174 | int retval; |
175 | ||
9bde7497 GKH |
176 | ep_dev = kzalloc(sizeof(*ep_dev), GFP_KERNEL); |
177 | if (!ep_dev) { | |
178 | retval = -ENOMEM; | |
55129666 | 179 | goto exit; |
7e27780f | 180 | } |
84412f62 | 181 | |
9bde7497 GKH |
182 | ep_dev->desc = &endpoint->desc; |
183 | ep_dev->udev = udev; | |
2e5f10e4 | 184 | ep_dev->dev.groups = ep_dev_groups; |
55129666 | 185 | ep_dev->dev.type = &usb_ep_device_type; |
9bde7497 GKH |
186 | ep_dev->dev.parent = parent; |
187 | ep_dev->dev.release = ep_device_release; | |
55129666 | 188 | dev_set_name(&ep_dev->dev, "ep_%02x", endpoint->desc.bEndpointAddress); |
84412f62 | 189 | |
9bde7497 GKH |
190 | retval = device_register(&ep_dev->dev); |
191 | if (retval) | |
55129666 | 192 | goto error_register; |
9bde7497 | 193 | |
d5477c11 | 194 | endpoint->ep_dev = ep_dev; |
1b21d5e1 GKH |
195 | return retval; |
196 | ||
d5477c11 | 197 | error_register: |
9bde7497 | 198 | kfree(ep_dev); |
d5477c11 | 199 | exit: |
1b21d5e1 | 200 | return retval; |
84412f62 GKH |
201 | } |
202 | ||
3b23dd6f | 203 | void usb_remove_ep_devs(struct usb_host_endpoint *endpoint) |
84412f62 | 204 | { |
7e27780f | 205 | struct ep_device *ep_dev = endpoint->ep_dev; |
84412f62 | 206 | |
7e27780f | 207 | if (ep_dev) { |
7e27780f | 208 | device_unregister(&ep_dev->dev); |
9bde7497 | 209 | endpoint->ep_dev = NULL; |
84412f62 GKH |
210 | } |
211 | } |