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