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Commit | Line | Data |
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c0efd232 LP |
1 | /* |
2 | * uvc_status.c -- USB Video Class driver - Status endpoint | |
3 | * | |
2c2d264b | 4 | * Copyright (C) 2007-2009 |
c0efd232 LP |
5 | * Laurent Pinchart (laurent.pinchart@skynet.be) |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | */ | |
13 | ||
14 | #include <linux/kernel.h> | |
c0efd232 | 15 | #include <linux/input.h> |
5a0e3ad6 | 16 | #include <linux/slab.h> |
c0efd232 LP |
17 | #include <linux/usb.h> |
18 | #include <linux/usb/input.h> | |
19 | ||
20 | #include "uvcvideo.h" | |
21 | ||
22 | /* -------------------------------------------------------------------------- | |
23 | * Input device | |
24 | */ | |
6833c917 | 25 | #ifdef CONFIG_USB_VIDEO_CLASS_INPUT_EVDEV |
c0efd232 LP |
26 | static int uvc_input_init(struct uvc_device *dev) |
27 | { | |
c0efd232 | 28 | struct input_dev *input; |
c0efd232 LP |
29 | int ret; |
30 | ||
31 | input = input_allocate_device(); | |
32 | if (input == NULL) | |
33 | return -ENOMEM; | |
34 | ||
f1801523 LP |
35 | usb_make_path(dev->udev, dev->input_phys, sizeof(dev->input_phys)); |
36 | strlcat(dev->input_phys, "/button", sizeof(dev->input_phys)); | |
c0efd232 LP |
37 | |
38 | input->name = dev->name; | |
f1801523 LP |
39 | input->phys = dev->input_phys; |
40 | usb_to_input_id(dev->udev, &input->id); | |
c0efd232 LP |
41 | input->dev.parent = &dev->intf->dev; |
42 | ||
74ca11c2 BN |
43 | __set_bit(EV_KEY, input->evbit); |
44 | __set_bit(KEY_CAMERA, input->keybit); | |
c0efd232 LP |
45 | |
46 | if ((ret = input_register_device(input)) < 0) | |
47 | goto error; | |
48 | ||
49 | dev->input = input; | |
50 | return 0; | |
51 | ||
52 | error: | |
53 | input_free_device(input); | |
c0efd232 LP |
54 | return ret; |
55 | } | |
56 | ||
57 | static void uvc_input_cleanup(struct uvc_device *dev) | |
58 | { | |
59 | if (dev->input) | |
60 | input_unregister_device(dev->input); | |
61 | } | |
62 | ||
6833c917 LP |
63 | static void uvc_input_report_key(struct uvc_device *dev, unsigned int code, |
64 | int value) | |
65 | { | |
74ca11c2 | 66 | if (dev->input) { |
6833c917 | 67 | input_report_key(dev->input, code, value); |
74ca11c2 BN |
68 | input_sync(dev->input); |
69 | } | |
6833c917 LP |
70 | } |
71 | ||
72 | #else | |
73 | #define uvc_input_init(dev) | |
74 | #define uvc_input_cleanup(dev) | |
75 | #define uvc_input_report_key(dev, code, value) | |
76 | #endif /* CONFIG_USB_VIDEO_CLASS_INPUT_EVDEV */ | |
77 | ||
c0efd232 LP |
78 | /* -------------------------------------------------------------------------- |
79 | * Status interrupt endpoint | |
80 | */ | |
81 | static void uvc_event_streaming(struct uvc_device *dev, __u8 *data, int len) | |
82 | { | |
83 | if (len < 3) { | |
84 | uvc_trace(UVC_TRACE_STATUS, "Invalid streaming status event " | |
85 | "received.\n"); | |
86 | return; | |
87 | } | |
88 | ||
89 | if (data[2] == 0) { | |
90 | if (len < 4) | |
91 | return; | |
92 | uvc_trace(UVC_TRACE_STATUS, "Button (intf %u) %s len %d\n", | |
93 | data[1], data[3] ? "pressed" : "released", len); | |
74ca11c2 | 94 | uvc_input_report_key(dev, KEY_CAMERA, data[3]); |
c0efd232 LP |
95 | } else { |
96 | uvc_trace(UVC_TRACE_STATUS, "Stream %u error event %02x %02x " | |
97 | "len %d.\n", data[1], data[2], data[3], len); | |
98 | } | |
99 | } | |
100 | ||
101 | static void uvc_event_control(struct uvc_device *dev, __u8 *data, int len) | |
102 | { | |
103 | char *attrs[3] = { "value", "info", "failure" }; | |
104 | ||
105 | if (len < 6 || data[2] != 0 || data[4] > 2) { | |
106 | uvc_trace(UVC_TRACE_STATUS, "Invalid control status event " | |
107 | "received.\n"); | |
108 | return; | |
109 | } | |
110 | ||
111 | uvc_trace(UVC_TRACE_STATUS, "Control %u/%u %s change len %d.\n", | |
112 | data[1], data[3], attrs[data[4]], len); | |
113 | } | |
114 | ||
115 | static void uvc_status_complete(struct urb *urb) | |
116 | { | |
117 | struct uvc_device *dev = urb->context; | |
118 | int len, ret; | |
119 | ||
120 | switch (urb->status) { | |
121 | case 0: | |
122 | break; | |
123 | ||
124 | case -ENOENT: /* usb_kill_urb() called. */ | |
125 | case -ECONNRESET: /* usb_unlink_urb() called. */ | |
126 | case -ESHUTDOWN: /* The endpoint is being disabled. */ | |
127 | case -EPROTO: /* Device is disconnected (reported by some | |
128 | * host controller). */ | |
129 | return; | |
130 | ||
131 | default: | |
132 | uvc_printk(KERN_WARNING, "Non-zero status (%d) in status " | |
133 | "completion handler.\n", urb->status); | |
134 | return; | |
135 | } | |
136 | ||
137 | len = urb->actual_length; | |
138 | if (len > 0) { | |
139 | switch (dev->status[0] & 0x0f) { | |
140 | case UVC_STATUS_TYPE_CONTROL: | |
141 | uvc_event_control(dev, dev->status, len); | |
142 | break; | |
143 | ||
144 | case UVC_STATUS_TYPE_STREAMING: | |
145 | uvc_event_streaming(dev, dev->status, len); | |
146 | break; | |
147 | ||
148 | default: | |
bd0232c1 LP |
149 | uvc_trace(UVC_TRACE_STATUS, "Unknown status event " |
150 | "type %u.\n", dev->status[0]); | |
c0efd232 LP |
151 | break; |
152 | } | |
153 | } | |
154 | ||
155 | /* Resubmit the URB. */ | |
156 | urb->interval = dev->int_ep->desc.bInterval; | |
157 | if ((ret = usb_submit_urb(urb, GFP_ATOMIC)) < 0) { | |
158 | uvc_printk(KERN_ERR, "Failed to resubmit status URB (%d).\n", | |
159 | ret); | |
160 | } | |
161 | } | |
162 | ||
163 | int uvc_status_init(struct uvc_device *dev) | |
164 | { | |
165 | struct usb_host_endpoint *ep = dev->int_ep; | |
166 | unsigned int pipe; | |
167 | int interval; | |
168 | ||
169 | if (ep == NULL) | |
170 | return 0; | |
171 | ||
172 | uvc_input_init(dev); | |
173 | ||
a31a4055 ML |
174 | dev->status = kzalloc(UVC_MAX_STATUS_SIZE, GFP_KERNEL); |
175 | if (dev->status == NULL) | |
176 | return -ENOMEM; | |
177 | ||
c0efd232 | 178 | dev->int_urb = usb_alloc_urb(0, GFP_KERNEL); |
a31a4055 ML |
179 | if (dev->int_urb == NULL) { |
180 | kfree(dev->status); | |
c0efd232 | 181 | return -ENOMEM; |
a31a4055 | 182 | } |
c0efd232 LP |
183 | |
184 | pipe = usb_rcvintpipe(dev->udev, ep->desc.bEndpointAddress); | |
185 | ||
186 | /* For high-speed interrupt endpoints, the bInterval value is used as | |
187 | * an exponent of two. Some developers forgot about it. | |
188 | */ | |
189 | interval = ep->desc.bInterval; | |
190 | if (interval > 16 && dev->udev->speed == USB_SPEED_HIGH && | |
191 | (dev->quirks & UVC_QUIRK_STATUS_INTERVAL)) | |
192 | interval = fls(interval) - 1; | |
193 | ||
194 | usb_fill_int_urb(dev->int_urb, dev->udev, pipe, | |
a31a4055 | 195 | dev->status, UVC_MAX_STATUS_SIZE, uvc_status_complete, |
c0efd232 LP |
196 | dev, interval); |
197 | ||
04a37e0f | 198 | return 0; |
c0efd232 LP |
199 | } |
200 | ||
201 | void uvc_status_cleanup(struct uvc_device *dev) | |
202 | { | |
203 | usb_kill_urb(dev->int_urb); | |
204 | usb_free_urb(dev->int_urb); | |
a31a4055 | 205 | kfree(dev->status); |
c0efd232 LP |
206 | uvc_input_cleanup(dev); |
207 | } | |
208 | ||
04a37e0f LP |
209 | int uvc_status_start(struct uvc_device *dev) |
210 | { | |
211 | if (dev->int_urb == NULL) | |
212 | return 0; | |
213 | ||
214 | return usb_submit_urb(dev->int_urb, GFP_KERNEL); | |
215 | } | |
216 | ||
217 | void uvc_status_stop(struct uvc_device *dev) | |
c0efd232 LP |
218 | { |
219 | usb_kill_urb(dev->int_urb); | |
04a37e0f LP |
220 | } |
221 | ||
222 | int uvc_status_suspend(struct uvc_device *dev) | |
223 | { | |
224 | if (atomic_read(&dev->users)) | |
225 | usb_kill_urb(dev->int_urb); | |
226 | ||
c0efd232 LP |
227 | return 0; |
228 | } | |
229 | ||
230 | int uvc_status_resume(struct uvc_device *dev) | |
231 | { | |
04a37e0f | 232 | if (dev->int_urb == NULL || atomic_read(&dev->users) == 0) |
c0efd232 LP |
233 | return 0; |
234 | ||
29135878 | 235 | return usb_submit_urb(dev->int_urb, GFP_NOIO); |
c0efd232 | 236 | } |
f87086e3 | 237 |