31 uvc_video_encode_header(struct uvc_video *video, struct uvc_buffer *buf,  in uvc_video_encode_header()  argument
35 	data[1] = UVC_STREAM_EOH | video->fid;  in uvc_video_encode_header()
37 	if (buf->bytesused - video->queue.buf_used <= len - 2)  in uvc_video_encode_header()
44 uvc_video_encode_data(struct uvc_video *video, struct uvc_buffer *buf,  in uvc_video_encode_data()  argument
47 	struct uvc_video_queue *queue = &video->queue;  in uvc_video_encode_data()
62 uvc_video_encode_bulk(struct usb_request *req, struct uvc_video *video,  in uvc_video_encode_bulk()  argument
66 	int len = video->req_size;  in uvc_video_encode_bulk()
70 	if (video->payload_size == 0) {  in uvc_video_encode_bulk()
71 		ret = uvc_video_encode_header(video, buf, mem, len);  in uvc_video_encode_bulk()
72 		video->payload_size += ret;  in uvc_video_encode_bulk()
78 	len = min((int)(video->max_payload_size - video->payload_size), len);  in uvc_video_encode_bulk()
79 	ret = uvc_video_encode_data(video, buf, mem, len);  in uvc_video_encode_bulk()
81 	video->payload_size += ret;  in uvc_video_encode_bulk()
84 	req->length = video->req_size - len;  in uvc_video_encode_bulk()
85 	req->zero = video->payload_size == video->max_payload_size;  in uvc_video_encode_bulk()
87 	if (buf->bytesused == video->queue.buf_used) {  in uvc_video_encode_bulk()
88 		video->queue.buf_used = 0;  in uvc_video_encode_bulk()
90 		uvcg_queue_next_buffer(&video->queue, buf);  in uvc_video_encode_bulk()
91 		video->fid ^= UVC_STREAM_FID;  in uvc_video_encode_bulk()
93 		video->payload_size = 0;  in uvc_video_encode_bulk()
96 	if (video->payload_size == video->max_payload_size ||  in uvc_video_encode_bulk()
97 	    buf->bytesused == video->queue.buf_used)  in uvc_video_encode_bulk()
98 		video->payload_size = 0;  in uvc_video_encode_bulk()
102 uvc_video_encode_isoc(struct usb_request *req, struct uvc_video *video,  in uvc_video_encode_isoc()  argument
106 	int len = video->req_size;  in uvc_video_encode_isoc()
110 	ret = uvc_video_encode_header(video, buf, mem, len);  in uvc_video_encode_isoc()
115 	ret = uvc_video_encode_data(video, buf, mem, len);  in uvc_video_encode_isoc()
118 	req->length = video->req_size - len;  in uvc_video_encode_isoc()
120 	if (buf->bytesused == video->queue.buf_used) {  in uvc_video_encode_isoc()
121 		video->queue.buf_used = 0;  in uvc_video_encode_isoc()
123 		uvcg_queue_next_buffer(&video->queue, buf);  in uvc_video_encode_isoc()
124 		video->fid ^= UVC_STREAM_FID;  in uvc_video_encode_isoc()
165 	struct uvc_video *video = req->context;  in uvc_video_complete()  local
166 	struct uvc_video_queue *queue = &video->queue;  in uvc_video_complete()
187 	spin_lock_irqsave(&video->queue.irqlock, flags);  in uvc_video_complete()
188 	buf = uvcg_queue_head(&video->queue);  in uvc_video_complete()
190 		spin_unlock_irqrestore(&video->queue.irqlock, flags);  in uvc_video_complete()
194 	video->encode(req, video, buf);  in uvc_video_complete()
199 		spin_unlock_irqrestore(&video->queue.irqlock, flags);  in uvc_video_complete()
203 	spin_unlock_irqrestore(&video->queue.irqlock, flags);  in uvc_video_complete()
208 	spin_lock_irqsave(&video->req_lock, flags);  in uvc_video_complete()
209 	list_add_tail(&req->list, &video->req_free);  in uvc_video_complete()
210 	spin_unlock_irqrestore(&video->req_lock, flags);  in uvc_video_complete()
214 uvc_video_free_requests(struct uvc_video *video)  in uvc_video_free_requests()  argument
219 		if (video->req[i]) {  in uvc_video_free_requests()
220 			usb_ep_free_request(video->ep, video->req[i]);  in uvc_video_free_requests()
221 			video->req[i] = NULL;  in uvc_video_free_requests()
224 		if (video->req_buffer[i]) {  in uvc_video_free_requests()
225 			kfree(video->req_buffer[i]);  in uvc_video_free_requests()
226 			video->req_buffer[i] = NULL;  in uvc_video_free_requests()
230 	INIT_LIST_HEAD(&video->req_free);  in uvc_video_free_requests()
231 	video->req_size = 0;  in uvc_video_free_requests()
236 uvc_video_alloc_requests(struct uvc_video *video)  in uvc_video_alloc_requests()  argument
242 	BUG_ON(video->req_size);  in uvc_video_alloc_requests()
244 	req_size = video->ep->maxpacket  in uvc_video_alloc_requests()
245 		 * max_t(unsigned int, video->ep->maxburst, 1)  in uvc_video_alloc_requests()
246 		 * (video->ep->mult + 1);  in uvc_video_alloc_requests()
249 		video->req_buffer[i] = kmalloc(req_size, GFP_KERNEL);  in uvc_video_alloc_requests()
250 		if (video->req_buffer[i] == NULL)  in uvc_video_alloc_requests()
253 		video->req[i] = usb_ep_alloc_request(video->ep, GFP_KERNEL);  in uvc_video_alloc_requests()
254 		if (video->req[i] == NULL)  in uvc_video_alloc_requests()
257 		video->req[i]->buf = video->req_buffer[i];  in uvc_video_alloc_requests()
258 		video->req[i]->length = 0;  in uvc_video_alloc_requests()
259 		video->req[i]->complete = uvc_video_complete;  in uvc_video_alloc_requests()
260 		video->req[i]->context = video;  in uvc_video_alloc_requests()
262 		list_add_tail(&video->req[i]->list, &video->req_free);  in uvc_video_alloc_requests()
265 	video->req_size = req_size;  in uvc_video_alloc_requests()
270 	uvc_video_free_requests(video);  in uvc_video_alloc_requests()
284 int uvcg_video_pump(struct uvc_video *video)  in uvcg_video_pump()  argument
286 	struct uvc_video_queue *queue = &video->queue;  in uvcg_video_pump()
300 		spin_lock_irqsave(&video->req_lock, flags);  in uvcg_video_pump()
301 		if (list_empty(&video->req_free)) {  in uvcg_video_pump()
302 			spin_unlock_irqrestore(&video->req_lock, flags);  in uvcg_video_pump()
305 		req = list_first_entry(&video->req_free, struct usb_request,  in uvcg_video_pump()
308 		spin_unlock_irqrestore(&video->req_lock, flags);  in uvcg_video_pump()
320 		video->encode(req, video, buf);  in uvcg_video_pump()
323 		ret = usb_ep_queue(video->ep, req, GFP_ATOMIC);  in uvcg_video_pump()
326 			usb_ep_set_halt(video->ep);  in uvcg_video_pump()
334 	spin_lock_irqsave(&video->req_lock, flags);  in uvcg_video_pump()
335 	list_add_tail(&req->list, &video->req_free);  in uvcg_video_pump()
336 	spin_unlock_irqrestore(&video->req_lock, flags);  in uvcg_video_pump()
343 int uvcg_video_enable(struct uvc_video *video, int enable)  in uvcg_video_enable()  argument
348 	if (video->ep == NULL) {  in uvcg_video_enable()
356 			if (video->req[i])  in uvcg_video_enable()
357 				usb_ep_dequeue(video->ep, video->req[i]);  in uvcg_video_enable()
359 		uvc_video_free_requests(video);  in uvcg_video_enable()
360 		uvcg_queue_enable(&video->queue, 0);  in uvcg_video_enable()
364 	if ((ret = uvcg_queue_enable(&video->queue, 1)) < 0)  in uvcg_video_enable()
367 	if ((ret = uvc_video_alloc_requests(video)) < 0)  in uvcg_video_enable()
370 	if (video->max_payload_size) {  in uvcg_video_enable()
371 		video->encode = uvc_video_encode_bulk;  in uvcg_video_enable()
372 		video->payload_size = 0;  in uvcg_video_enable()
374 		video->encode = uvc_video_encode_isoc;  in uvcg_video_enable()
376 	return uvcg_video_pump(video);  in uvcg_video_enable()
382 int uvcg_video_init(struct uvc_video *video)  in uvcg_video_init()  argument
384 	INIT_LIST_HEAD(&video->req_free);  in uvcg_video_init()
385 	spin_lock_init(&video->req_lock);  in uvcg_video_init()
387 	video->fcc = V4L2_PIX_FMT_YUYV;  in uvcg_video_init()
388 	video->bpp = 16;  in uvcg_video_init()
389 	video->width = 320;  in uvcg_video_init()
390 	video->height = 240;  in uvcg_video_init()
391 	video->imagesize = 320 * 240 * 2;  in uvcg_video_init()
394 	uvcg_queue_init(&video->queue, V4L2_BUF_TYPE_VIDEO_OUTPUT,  in uvcg_video_init()
395 			&video->mutex);  in uvcg_video_init()