Commit | Line | Data |
---|---|---|
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 | { | |
c0efd232 | 27 | struct input_dev *input; |
c0efd232 LP |
28 | int ret; |
29 | ||
30 | input = input_allocate_device(); | |
31 | if (input == NULL) | |
32 | return -ENOMEM; | |
33 | ||
f1801523 LP |
34 | usb_make_path(dev->udev, dev->input_phys, sizeof(dev->input_phys)); |
35 | strlcat(dev->input_phys, "/button", sizeof(dev->input_phys)); | |
c0efd232 LP |
36 | |
37 | input->name = dev->name; | |
f1801523 LP |
38 | input->phys = dev->input_phys; |
39 | usb_to_input_id(dev->udev, &input->id); | |
c0efd232 LP |
40 | input->dev.parent = &dev->intf->dev; |
41 | ||
74ca11c2 BN |
42 | __set_bit(EV_KEY, input->evbit); |
43 | __set_bit(KEY_CAMERA, input->keybit); | |
c0efd232 LP |
44 | |
45 | if ((ret = input_register_device(input)) < 0) | |
46 | goto error; | |
47 | ||
48 | dev->input = input; | |
49 | return 0; | |
50 | ||
51 | error: | |
52 | input_free_device(input); | |
c0efd232 LP |
53 | return ret; |
54 | } | |
55 | ||
56 | static void uvc_input_cleanup(struct uvc_device *dev) | |
57 | { | |
58 | if (dev->input) | |
59 | input_unregister_device(dev->input); | |
60 | } | |
61 | ||
6833c917 LP |
62 | static void uvc_input_report_key(struct uvc_device *dev, unsigned int code, |
63 | int value) | |
64 | { | |
74ca11c2 | 65 | if (dev->input) { |
6833c917 | 66 | input_report_key(dev->input, code, value); |
74ca11c2 BN |
67 | input_sync(dev->input); |
68 | } | |
6833c917 LP |
69 | } |
70 | ||
71 | #else | |
72 | #define uvc_input_init(dev) | |
73 | #define uvc_input_cleanup(dev) | |
74 | #define uvc_input_report_key(dev, code, value) | |
75 | #endif /* CONFIG_USB_VIDEO_CLASS_INPUT_EVDEV */ | |
76 | ||
c0efd232 LP |
77 | /* -------------------------------------------------------------------------- |
78 | * Status interrupt endpoint | |
79 | */ | |
80 | static void uvc_event_streaming(struct uvc_device *dev, __u8 *data, int len) | |
81 | { | |
82 | if (len < 3) { | |
83 | uvc_trace(UVC_TRACE_STATUS, "Invalid streaming status event " | |
84 | "received.\n"); | |
85 | return; | |
86 | } | |
87 | ||
88 | if (data[2] == 0) { | |
89 | if (len < 4) | |
90 | return; | |
91 | uvc_trace(UVC_TRACE_STATUS, "Button (intf %u) %s len %d\n", | |
92 | data[1], data[3] ? "pressed" : "released", len); | |
74ca11c2 | 93 | uvc_input_report_key(dev, KEY_CAMERA, data[3]); |
c0efd232 LP |
94 | } else { |
95 | uvc_trace(UVC_TRACE_STATUS, "Stream %u error event %02x %02x " | |
96 | "len %d.\n", data[1], data[2], data[3], len); | |
97 | } | |
98 | } | |
99 | ||
100 | static void uvc_event_control(struct uvc_device *dev, __u8 *data, int len) | |
101 | { | |
102 | char *attrs[3] = { "value", "info", "failure" }; | |
103 | ||
104 | if (len < 6 || data[2] != 0 || data[4] > 2) { | |
105 | uvc_trace(UVC_TRACE_STATUS, "Invalid control status event " | |
106 | "received.\n"); | |
107 | return; | |
108 | } | |
109 | ||
110 | uvc_trace(UVC_TRACE_STATUS, "Control %u/%u %s change len %d.\n", | |
111 | data[1], data[3], attrs[data[4]], len); | |
112 | } | |
113 | ||
114 | static void uvc_status_complete(struct urb *urb) | |
115 | { | |
116 | struct uvc_device *dev = urb->context; | |
117 | int len, ret; | |
118 | ||
119 | switch (urb->status) { | |
120 | case 0: | |
121 | break; | |
122 | ||
123 | case -ENOENT: /* usb_kill_urb() called. */ | |
124 | case -ECONNRESET: /* usb_unlink_urb() called. */ | |
125 | case -ESHUTDOWN: /* The endpoint is being disabled. */ | |
126 | case -EPROTO: /* Device is disconnected (reported by some | |
127 | * host controller). */ | |
128 | return; | |
129 | ||
130 | default: | |
131 | uvc_printk(KERN_WARNING, "Non-zero status (%d) in status " | |
132 | "completion handler.\n", urb->status); | |
133 | return; | |
134 | } | |
135 | ||
136 | len = urb->actual_length; | |
137 | if (len > 0) { | |
138 | switch (dev->status[0] & 0x0f) { | |
139 | case UVC_STATUS_TYPE_CONTROL: | |
140 | uvc_event_control(dev, dev->status, len); | |
141 | break; | |
142 | ||
143 | case UVC_STATUS_TYPE_STREAMING: | |
144 | uvc_event_streaming(dev, dev->status, len); | |
145 | break; | |
146 | ||
147 | default: | |
148 | uvc_printk(KERN_INFO, "unknown event type %u.\n", | |
149 | dev->status[0]); | |
150 | break; | |
151 | } | |
152 | } | |
153 | ||
154 | /* Resubmit the URB. */ | |
155 | urb->interval = dev->int_ep->desc.bInterval; | |
156 | if ((ret = usb_submit_urb(urb, GFP_ATOMIC)) < 0) { | |
157 | uvc_printk(KERN_ERR, "Failed to resubmit status URB (%d).\n", | |
158 | ret); | |
159 | } | |
160 | } | |
161 | ||
162 | int uvc_status_init(struct uvc_device *dev) | |
163 | { | |
164 | struct usb_host_endpoint *ep = dev->int_ep; | |
165 | unsigned int pipe; | |
166 | int interval; | |
167 | ||
168 | if (ep == NULL) | |
169 | return 0; | |
170 | ||
171 | uvc_input_init(dev); | |
172 | ||
a31a4055 ML |
173 | dev->status = kzalloc(UVC_MAX_STATUS_SIZE, GFP_KERNEL); |
174 | if (dev->status == NULL) | |
175 | return -ENOMEM; | |
176 | ||
c0efd232 | 177 | dev->int_urb = usb_alloc_urb(0, GFP_KERNEL); |
a31a4055 ML |
178 | if (dev->int_urb == NULL) { |
179 | kfree(dev->status); | |
c0efd232 | 180 | return -ENOMEM; |
a31a4055 | 181 | } |
c0efd232 LP |
182 | |
183 | pipe = usb_rcvintpipe(dev->udev, ep->desc.bEndpointAddress); | |
184 | ||
185 | /* For high-speed interrupt endpoints, the bInterval value is used as | |
186 | * an exponent of two. Some developers forgot about it. | |
187 | */ | |
188 | interval = ep->desc.bInterval; | |
189 | if (interval > 16 && dev->udev->speed == USB_SPEED_HIGH && | |
190 | (dev->quirks & UVC_QUIRK_STATUS_INTERVAL)) | |
191 | interval = fls(interval) - 1; | |
192 | ||
193 | usb_fill_int_urb(dev->int_urb, dev->udev, pipe, | |
a31a4055 | 194 | dev->status, UVC_MAX_STATUS_SIZE, uvc_status_complete, |
c0efd232 LP |
195 | dev, interval); |
196 | ||
197 | return usb_submit_urb(dev->int_urb, GFP_KERNEL); | |
198 | } | |
199 | ||
200 | void uvc_status_cleanup(struct uvc_device *dev) | |
201 | { | |
202 | usb_kill_urb(dev->int_urb); | |
203 | usb_free_urb(dev->int_urb); | |
a31a4055 | 204 | kfree(dev->status); |
c0efd232 LP |
205 | uvc_input_cleanup(dev); |
206 | } | |
207 | ||
208 | int uvc_status_suspend(struct uvc_device *dev) | |
209 | { | |
210 | usb_kill_urb(dev->int_urb); | |
211 | return 0; | |
212 | } | |
213 | ||
214 | int uvc_status_resume(struct uvc_device *dev) | |
215 | { | |
216 | if (dev->int_urb == NULL) | |
217 | return 0; | |
218 | ||
29135878 | 219 | return usb_submit_urb(dev->int_urb, GFP_NOIO); |
c0efd232 | 220 | } |
f87086e3 | 221 |