782 lines
21 KiB
C
782 lines
21 KiB
C
/*
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* Copyright (c) 2013 Lubomir Rintel
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL").
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Fushicai USBTV007 Audio-Video Grabber Driver
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*
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* Product web site:
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* http://www.fushicai.com/products_detail/&productId=d05449ee-b690-42f9-a661-aa7353894bed.html
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*
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* Following LWN articles were very useful in construction of this driver:
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* Video4Linux2 API series: http://lwn.net/Articles/203924/
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* videobuf2 API explanation: http://lwn.net/Articles/447435/
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* Thanks go to Jonathan Corbet for providing this quality documentation.
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* He is awesome.
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*
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* No physical hardware was harmed running Windows during the
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* reverse-engineering activity
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*/
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#include <media/v4l2-ioctl.h>
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#include <media/videobuf2-v4l2.h>
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#include "usbtv.h"
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static struct usbtv_norm_params norm_params[] = {
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{
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.norm = V4L2_STD_525_60,
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.cap_width = 720,
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.cap_height = 480,
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},
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{
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.norm = V4L2_STD_PAL,
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.cap_width = 720,
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.cap_height = 576,
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}
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};
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static int usbtv_configure_for_norm(struct usbtv *usbtv, v4l2_std_id norm)
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{
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int i, ret = 0;
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struct usbtv_norm_params *params = NULL;
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for (i = 0; i < ARRAY_SIZE(norm_params); i++) {
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if (norm_params[i].norm & norm) {
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params = &norm_params[i];
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break;
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}
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}
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if (params) {
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usbtv->width = params->cap_width;
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usbtv->height = params->cap_height;
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usbtv->n_chunks = usbtv->width * usbtv->height
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/ 4 / USBTV_CHUNK;
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usbtv->norm = params->norm;
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} else
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ret = -EINVAL;
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return ret;
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}
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static int usbtv_select_input(struct usbtv *usbtv, int input)
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{
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int ret;
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static const u16 composite[][2] = {
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{ USBTV_BASE + 0x0105, 0x0060 },
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{ USBTV_BASE + 0x011f, 0x00f2 },
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{ USBTV_BASE + 0x0127, 0x0060 },
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{ USBTV_BASE + 0x00ae, 0x0010 },
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{ USBTV_BASE + 0x0239, 0x0060 },
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};
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static const u16 svideo[][2] = {
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{ USBTV_BASE + 0x0105, 0x0010 },
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{ USBTV_BASE + 0x011f, 0x00ff },
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{ USBTV_BASE + 0x0127, 0x0060 },
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{ USBTV_BASE + 0x00ae, 0x0030 },
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{ USBTV_BASE + 0x0239, 0x0060 },
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};
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switch (input) {
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case USBTV_COMPOSITE_INPUT:
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ret = usbtv_set_regs(usbtv, composite, ARRAY_SIZE(composite));
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break;
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case USBTV_SVIDEO_INPUT:
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ret = usbtv_set_regs(usbtv, svideo, ARRAY_SIZE(svideo));
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break;
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default:
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ret = -EINVAL;
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}
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if (!ret)
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usbtv->input = input;
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return ret;
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}
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static int usbtv_select_norm(struct usbtv *usbtv, v4l2_std_id norm)
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{
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int ret;
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static const u16 pal[][2] = {
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{ USBTV_BASE + 0x001a, 0x0068 },
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{ USBTV_BASE + 0x010e, 0x0072 },
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{ USBTV_BASE + 0x010f, 0x00a2 },
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{ USBTV_BASE + 0x0112, 0x00b0 },
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{ USBTV_BASE + 0x0117, 0x0001 },
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{ USBTV_BASE + 0x0118, 0x002c },
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{ USBTV_BASE + 0x012d, 0x0010 },
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{ USBTV_BASE + 0x012f, 0x0020 },
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{ USBTV_BASE + 0x024f, 0x0002 },
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{ USBTV_BASE + 0x0254, 0x0059 },
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{ USBTV_BASE + 0x025a, 0x0016 },
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{ USBTV_BASE + 0x025b, 0x0035 },
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{ USBTV_BASE + 0x0263, 0x0017 },
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{ USBTV_BASE + 0x0266, 0x0016 },
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{ USBTV_BASE + 0x0267, 0x0036 }
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};
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static const u16 ntsc[][2] = {
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{ USBTV_BASE + 0x001a, 0x0079 },
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{ USBTV_BASE + 0x010e, 0x0068 },
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{ USBTV_BASE + 0x010f, 0x009c },
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{ USBTV_BASE + 0x0112, 0x00f0 },
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{ USBTV_BASE + 0x0117, 0x0000 },
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{ USBTV_BASE + 0x0118, 0x00fc },
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{ USBTV_BASE + 0x012d, 0x0004 },
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{ USBTV_BASE + 0x012f, 0x0008 },
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{ USBTV_BASE + 0x024f, 0x0001 },
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{ USBTV_BASE + 0x0254, 0x005f },
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{ USBTV_BASE + 0x025a, 0x0012 },
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{ USBTV_BASE + 0x025b, 0x0001 },
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{ USBTV_BASE + 0x0263, 0x001c },
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{ USBTV_BASE + 0x0266, 0x0011 },
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{ USBTV_BASE + 0x0267, 0x0005 }
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};
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ret = usbtv_configure_for_norm(usbtv, norm);
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if (!ret) {
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if (norm & V4L2_STD_525_60)
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ret = usbtv_set_regs(usbtv, ntsc, ARRAY_SIZE(ntsc));
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else if (norm & V4L2_STD_PAL)
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ret = usbtv_set_regs(usbtv, pal, ARRAY_SIZE(pal));
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}
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return ret;
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}
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static int usbtv_setup_capture(struct usbtv *usbtv)
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{
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int ret;
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static const u16 setup[][2] = {
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/* These seem to enable the device. */
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{ USBTV_BASE + 0x0008, 0x0001 },
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{ USBTV_BASE + 0x01d0, 0x00ff },
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{ USBTV_BASE + 0x01d9, 0x0002 },
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/* These seem to influence color parameters, such as
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* brightness, etc. */
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{ USBTV_BASE + 0x0239, 0x0040 },
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{ USBTV_BASE + 0x0240, 0x0000 },
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{ USBTV_BASE + 0x0241, 0x0000 },
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{ USBTV_BASE + 0x0242, 0x0002 },
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{ USBTV_BASE + 0x0243, 0x0080 },
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{ USBTV_BASE + 0x0244, 0x0012 },
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{ USBTV_BASE + 0x0245, 0x0090 },
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{ USBTV_BASE + 0x0246, 0x0000 },
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{ USBTV_BASE + 0x0278, 0x002d },
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{ USBTV_BASE + 0x0279, 0x000a },
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{ USBTV_BASE + 0x027a, 0x0032 },
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{ 0xf890, 0x000c },
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{ 0xf894, 0x0086 },
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{ USBTV_BASE + 0x00ac, 0x00c0 },
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{ USBTV_BASE + 0x00ad, 0x0000 },
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{ USBTV_BASE + 0x00a2, 0x0012 },
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{ USBTV_BASE + 0x00a3, 0x00e0 },
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{ USBTV_BASE + 0x00a4, 0x0028 },
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{ USBTV_BASE + 0x00a5, 0x0082 },
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{ USBTV_BASE + 0x00a7, 0x0080 },
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{ USBTV_BASE + 0x0000, 0x0014 },
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{ USBTV_BASE + 0x0006, 0x0003 },
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{ USBTV_BASE + 0x0090, 0x0099 },
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{ USBTV_BASE + 0x0091, 0x0090 },
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{ USBTV_BASE + 0x0094, 0x0068 },
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{ USBTV_BASE + 0x0095, 0x0070 },
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{ USBTV_BASE + 0x009c, 0x0030 },
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{ USBTV_BASE + 0x009d, 0x00c0 },
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{ USBTV_BASE + 0x009e, 0x00e0 },
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{ USBTV_BASE + 0x0019, 0x0006 },
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{ USBTV_BASE + 0x008c, 0x00ba },
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{ USBTV_BASE + 0x0101, 0x00ff },
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{ USBTV_BASE + 0x010c, 0x00b3 },
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{ USBTV_BASE + 0x01b2, 0x0080 },
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{ USBTV_BASE + 0x01b4, 0x00a0 },
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{ USBTV_BASE + 0x014c, 0x00ff },
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{ USBTV_BASE + 0x014d, 0x00ca },
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{ USBTV_BASE + 0x0113, 0x0053 },
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{ USBTV_BASE + 0x0119, 0x008a },
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{ USBTV_BASE + 0x013c, 0x0003 },
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{ USBTV_BASE + 0x0150, 0x009c },
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{ USBTV_BASE + 0x0151, 0x0071 },
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{ USBTV_BASE + 0x0152, 0x00c6 },
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{ USBTV_BASE + 0x0153, 0x0084 },
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{ USBTV_BASE + 0x0154, 0x00bc },
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{ USBTV_BASE + 0x0155, 0x00a0 },
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{ USBTV_BASE + 0x0156, 0x00a0 },
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{ USBTV_BASE + 0x0157, 0x009c },
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{ USBTV_BASE + 0x0158, 0x001f },
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{ USBTV_BASE + 0x0159, 0x0006 },
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{ USBTV_BASE + 0x015d, 0x0000 },
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{ USBTV_BASE + 0x0003, 0x0004 },
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{ USBTV_BASE + 0x0100, 0x00d3 },
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{ USBTV_BASE + 0x0115, 0x0015 },
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{ USBTV_BASE + 0x0220, 0x002e },
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{ USBTV_BASE + 0x0225, 0x0008 },
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{ USBTV_BASE + 0x024e, 0x0002 },
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{ USBTV_BASE + 0x024e, 0x0002 },
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{ USBTV_BASE + 0x024f, 0x0002 },
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};
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ret = usbtv_set_regs(usbtv, setup, ARRAY_SIZE(setup));
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if (ret)
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return ret;
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ret = usbtv_select_norm(usbtv, usbtv->norm);
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if (ret)
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return ret;
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ret = usbtv_select_input(usbtv, usbtv->input);
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if (ret)
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return ret;
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return 0;
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}
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/* Copy data from chunk into a frame buffer, deinterlacing the data
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* into every second line. Unfortunately, they don't align nicely into
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* 720 pixel lines, as the chunk is 240 words long, which is 480 pixels.
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* Therefore, we break down the chunk into two halves before copying,
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* so that we can interleave a line if needed.
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*
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* Each "chunk" is 240 words; a word in this context equals 4 bytes.
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* Image format is YUYV/YUV 4:2:2, consisting of Y Cr Y Cb, defining two
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* pixels, the Cr and Cb shared between the two pixels, but each having
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* separate Y values. Thus, the 240 words equal 480 pixels. It therefore,
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* takes 1.5 chunks to make a 720 pixel-wide line for the frame.
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* The image is interlaced, so there is a "scan" of odd lines, followed
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* by "scan" of even numbered lines.
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*
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* Following code is writing the chunks in correct sequence, skipping
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* the rows based on "odd" value.
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* line 1: chunk[0][ 0..479] chunk[0][480..959] chunk[1][ 0..479]
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* line 3: chunk[1][480..959] chunk[2][ 0..479] chunk[2][480..959]
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* ...etc.
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*/
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static void usbtv_chunk_to_vbuf(u32 *frame, __be32 *src, int chunk_no, int odd)
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{
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int half;
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for (half = 0; half < 2; half++) {
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int part_no = chunk_no * 2 + half;
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int line = part_no / 3;
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int part_index = (line * 2 + !odd) * 3 + (part_no % 3);
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u32 *dst = &frame[part_index * USBTV_CHUNK/2];
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memcpy(dst, src, USBTV_CHUNK/2 * sizeof(*src));
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src += USBTV_CHUNK/2;
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}
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}
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/* Called for each 256-byte image chunk.
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* First word identifies the chunk, followed by 240 words of image
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* data and padding. */
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static void usbtv_image_chunk(struct usbtv *usbtv, __be32 *chunk)
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{
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int frame_id, odd, chunk_no;
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u32 *frame;
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struct usbtv_buf *buf;
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unsigned long flags;
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/* Ignore corrupted lines. */
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if (!USBTV_MAGIC_OK(chunk))
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return;
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frame_id = USBTV_FRAME_ID(chunk);
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odd = USBTV_ODD(chunk);
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chunk_no = USBTV_CHUNK_NO(chunk);
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if (chunk_no >= usbtv->n_chunks)
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return;
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/* Beginning of a frame. */
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if (chunk_no == 0) {
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usbtv->frame_id = frame_id;
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usbtv->chunks_done = 0;
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}
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if (usbtv->frame_id != frame_id)
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return;
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spin_lock_irqsave(&usbtv->buflock, flags);
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if (list_empty(&usbtv->bufs)) {
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/* No free buffers. Userspace likely too slow. */
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spin_unlock_irqrestore(&usbtv->buflock, flags);
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return;
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}
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/* First available buffer. */
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buf = list_first_entry(&usbtv->bufs, struct usbtv_buf, list);
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frame = vb2_plane_vaddr(&buf->vb.vb2_buf, 0);
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/* Copy the chunk data. */
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usbtv_chunk_to_vbuf(frame, &chunk[1], chunk_no, odd);
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usbtv->chunks_done++;
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/* Last chunk in a field */
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if (chunk_no == usbtv->n_chunks-1) {
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/* Last chunk in a frame, signalling an end */
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if (odd && !usbtv->last_odd) {
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int size = vb2_plane_size(&buf->vb.vb2_buf, 0);
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enum vb2_buffer_state state = usbtv->chunks_done ==
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usbtv->n_chunks ?
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VB2_BUF_STATE_DONE :
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VB2_BUF_STATE_ERROR;
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buf->vb.field = V4L2_FIELD_INTERLACED;
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buf->vb.sequence = usbtv->sequence++;
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buf->vb.vb2_buf.timestamp = ktime_get_ns();
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vb2_set_plane_payload(&buf->vb.vb2_buf, 0, size);
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vb2_buffer_done(&buf->vb.vb2_buf, state);
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list_del(&buf->list);
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}
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usbtv->last_odd = odd;
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}
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spin_unlock_irqrestore(&usbtv->buflock, flags);
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}
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/* Got image data. Each packet contains a number of 256-word chunks we
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* compose the image from. */
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static void usbtv_iso_cb(struct urb *ip)
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{
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int ret;
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int i;
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struct usbtv *usbtv = (struct usbtv *)ip->context;
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switch (ip->status) {
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/* All fine. */
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case 0:
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break;
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/* Device disconnected or capture stopped? */
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case -ENODEV:
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case -ENOENT:
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case -ECONNRESET:
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case -ESHUTDOWN:
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return;
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/* Unknown error. Retry. */
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default:
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dev_warn(usbtv->dev, "Bad response for ISO request.\n");
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goto resubmit;
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}
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for (i = 0; i < ip->number_of_packets; i++) {
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int size = ip->iso_frame_desc[i].actual_length;
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unsigned char *data = ip->transfer_buffer +
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ip->iso_frame_desc[i].offset;
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int offset;
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for (offset = 0; USBTV_CHUNK_SIZE * offset < size; offset++)
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usbtv_image_chunk(usbtv,
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(__be32 *)&data[USBTV_CHUNK_SIZE * offset]);
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}
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resubmit:
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ret = usb_submit_urb(ip, GFP_ATOMIC);
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if (ret < 0)
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dev_warn(usbtv->dev, "Could not resubmit ISO URB\n");
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}
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static struct urb *usbtv_setup_iso_transfer(struct usbtv *usbtv)
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{
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struct urb *ip;
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int size = usbtv->iso_size;
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int i;
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ip = usb_alloc_urb(USBTV_ISOC_PACKETS, GFP_KERNEL);
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if (ip == NULL)
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return NULL;
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ip->dev = usbtv->udev;
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ip->context = usbtv;
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ip->pipe = usb_rcvisocpipe(usbtv->udev, USBTV_VIDEO_ENDP);
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ip->interval = 1;
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ip->transfer_flags = URB_ISO_ASAP;
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ip->transfer_buffer = kzalloc(size * USBTV_ISOC_PACKETS,
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GFP_KERNEL);
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if (!ip->transfer_buffer) {
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usb_free_urb(ip);
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return NULL;
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}
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ip->complete = usbtv_iso_cb;
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ip->number_of_packets = USBTV_ISOC_PACKETS;
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ip->transfer_buffer_length = size * USBTV_ISOC_PACKETS;
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for (i = 0; i < USBTV_ISOC_PACKETS; i++) {
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ip->iso_frame_desc[i].offset = size * i;
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ip->iso_frame_desc[i].length = size;
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}
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return ip;
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}
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static void usbtv_stop(struct usbtv *usbtv)
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{
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int i;
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unsigned long flags;
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/* Cancel running transfers. */
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for (i = 0; i < USBTV_ISOC_TRANSFERS; i++) {
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struct urb *ip = usbtv->isoc_urbs[i];
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if (ip == NULL)
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continue;
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usb_kill_urb(ip);
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kfree(ip->transfer_buffer);
|
|
usb_free_urb(ip);
|
|
usbtv->isoc_urbs[i] = NULL;
|
|
}
|
|
|
|
/* Return buffers to userspace. */
|
|
spin_lock_irqsave(&usbtv->buflock, flags);
|
|
while (!list_empty(&usbtv->bufs)) {
|
|
struct usbtv_buf *buf = list_first_entry(&usbtv->bufs,
|
|
struct usbtv_buf, list);
|
|
vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
|
|
list_del(&buf->list);
|
|
}
|
|
spin_unlock_irqrestore(&usbtv->buflock, flags);
|
|
}
|
|
|
|
static int usbtv_start(struct usbtv *usbtv)
|
|
{
|
|
int i;
|
|
int ret;
|
|
|
|
usbtv_audio_suspend(usbtv);
|
|
|
|
ret = usb_set_interface(usbtv->udev, 0, 0);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
ret = usbtv_setup_capture(usbtv);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
ret = usb_set_interface(usbtv->udev, 0, 1);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
usbtv_audio_resume(usbtv);
|
|
|
|
for (i = 0; i < USBTV_ISOC_TRANSFERS; i++) {
|
|
struct urb *ip;
|
|
|
|
ip = usbtv_setup_iso_transfer(usbtv);
|
|
if (ip == NULL) {
|
|
ret = -ENOMEM;
|
|
goto start_fail;
|
|
}
|
|
usbtv->isoc_urbs[i] = ip;
|
|
|
|
ret = usb_submit_urb(ip, GFP_KERNEL);
|
|
if (ret < 0)
|
|
goto start_fail;
|
|
}
|
|
|
|
return 0;
|
|
|
|
start_fail:
|
|
usbtv_stop(usbtv);
|
|
return ret;
|
|
}
|
|
|
|
static int usbtv_querycap(struct file *file, void *priv,
|
|
struct v4l2_capability *cap)
|
|
{
|
|
struct usbtv *dev = video_drvdata(file);
|
|
|
|
strlcpy(cap->driver, "usbtv", sizeof(cap->driver));
|
|
strlcpy(cap->card, "usbtv", sizeof(cap->card));
|
|
usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info));
|
|
cap->device_caps = V4L2_CAP_VIDEO_CAPTURE;
|
|
cap->device_caps |= V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
|
|
cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
|
|
return 0;
|
|
}
|
|
|
|
static int usbtv_enum_input(struct file *file, void *priv,
|
|
struct v4l2_input *i)
|
|
{
|
|
struct usbtv *dev = video_drvdata(file);
|
|
|
|
switch (i->index) {
|
|
case USBTV_COMPOSITE_INPUT:
|
|
strlcpy(i->name, "Composite", sizeof(i->name));
|
|
break;
|
|
case USBTV_SVIDEO_INPUT:
|
|
strlcpy(i->name, "S-Video", sizeof(i->name));
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
i->type = V4L2_INPUT_TYPE_CAMERA;
|
|
i->std = dev->vdev.tvnorms;
|
|
return 0;
|
|
}
|
|
|
|
static int usbtv_enum_fmt_vid_cap(struct file *file, void *priv,
|
|
struct v4l2_fmtdesc *f)
|
|
{
|
|
if (f->index > 0)
|
|
return -EINVAL;
|
|
|
|
strlcpy(f->description, "16 bpp YUY2, 4:2:2, packed",
|
|
sizeof(f->description));
|
|
f->pixelformat = V4L2_PIX_FMT_YUYV;
|
|
return 0;
|
|
}
|
|
|
|
static int usbtv_fmt_vid_cap(struct file *file, void *priv,
|
|
struct v4l2_format *f)
|
|
{
|
|
struct usbtv *usbtv = video_drvdata(file);
|
|
|
|
f->fmt.pix.width = usbtv->width;
|
|
f->fmt.pix.height = usbtv->height;
|
|
f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
|
|
f->fmt.pix.field = V4L2_FIELD_INTERLACED;
|
|
f->fmt.pix.bytesperline = usbtv->width * 2;
|
|
f->fmt.pix.sizeimage = (f->fmt.pix.bytesperline * f->fmt.pix.height);
|
|
f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int usbtv_g_std(struct file *file, void *priv, v4l2_std_id *norm)
|
|
{
|
|
struct usbtv *usbtv = video_drvdata(file);
|
|
*norm = usbtv->norm;
|
|
return 0;
|
|
}
|
|
|
|
static int usbtv_s_std(struct file *file, void *priv, v4l2_std_id norm)
|
|
{
|
|
int ret = -EINVAL;
|
|
struct usbtv *usbtv = video_drvdata(file);
|
|
|
|
if ((norm & V4L2_STD_525_60) || (norm & V4L2_STD_PAL))
|
|
ret = usbtv_select_norm(usbtv, norm);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int usbtv_g_input(struct file *file, void *priv, unsigned int *i)
|
|
{
|
|
struct usbtv *usbtv = video_drvdata(file);
|
|
*i = usbtv->input;
|
|
return 0;
|
|
}
|
|
|
|
static int usbtv_s_input(struct file *file, void *priv, unsigned int i)
|
|
{
|
|
struct usbtv *usbtv = video_drvdata(file);
|
|
|
|
return usbtv_select_input(usbtv, i);
|
|
}
|
|
|
|
static struct v4l2_ioctl_ops usbtv_ioctl_ops = {
|
|
.vidioc_querycap = usbtv_querycap,
|
|
.vidioc_enum_input = usbtv_enum_input,
|
|
.vidioc_enum_fmt_vid_cap = usbtv_enum_fmt_vid_cap,
|
|
.vidioc_g_fmt_vid_cap = usbtv_fmt_vid_cap,
|
|
.vidioc_try_fmt_vid_cap = usbtv_fmt_vid_cap,
|
|
.vidioc_s_fmt_vid_cap = usbtv_fmt_vid_cap,
|
|
.vidioc_g_std = usbtv_g_std,
|
|
.vidioc_s_std = usbtv_s_std,
|
|
.vidioc_g_input = usbtv_g_input,
|
|
.vidioc_s_input = usbtv_s_input,
|
|
|
|
.vidioc_reqbufs = vb2_ioctl_reqbufs,
|
|
.vidioc_prepare_buf = vb2_ioctl_prepare_buf,
|
|
.vidioc_querybuf = vb2_ioctl_querybuf,
|
|
.vidioc_create_bufs = vb2_ioctl_create_bufs,
|
|
.vidioc_qbuf = vb2_ioctl_qbuf,
|
|
.vidioc_dqbuf = vb2_ioctl_dqbuf,
|
|
.vidioc_streamon = vb2_ioctl_streamon,
|
|
.vidioc_streamoff = vb2_ioctl_streamoff,
|
|
};
|
|
|
|
static struct v4l2_file_operations usbtv_fops = {
|
|
.owner = THIS_MODULE,
|
|
.unlocked_ioctl = video_ioctl2,
|
|
.mmap = vb2_fop_mmap,
|
|
.open = v4l2_fh_open,
|
|
.release = vb2_fop_release,
|
|
.read = vb2_fop_read,
|
|
.poll = vb2_fop_poll,
|
|
};
|
|
|
|
static int usbtv_queue_setup(struct vb2_queue *vq,
|
|
unsigned int *nbuffers,
|
|
unsigned int *nplanes, unsigned int sizes[], struct device *alloc_devs[])
|
|
{
|
|
struct usbtv *usbtv = vb2_get_drv_priv(vq);
|
|
unsigned size = USBTV_CHUNK * usbtv->n_chunks * 2 * sizeof(u32);
|
|
|
|
if (vq->num_buffers + *nbuffers < 2)
|
|
*nbuffers = 2 - vq->num_buffers;
|
|
if (*nplanes)
|
|
return sizes[0] < size ? -EINVAL : 0;
|
|
*nplanes = 1;
|
|
sizes[0] = size;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void usbtv_buf_queue(struct vb2_buffer *vb)
|
|
{
|
|
struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
|
|
struct usbtv *usbtv = vb2_get_drv_priv(vb->vb2_queue);
|
|
struct usbtv_buf *buf = container_of(vbuf, struct usbtv_buf, vb);
|
|
unsigned long flags;
|
|
|
|
if (usbtv->udev == NULL) {
|
|
vb2_buffer_done(vb, VB2_BUF_STATE_ERROR);
|
|
return;
|
|
}
|
|
|
|
spin_lock_irqsave(&usbtv->buflock, flags);
|
|
list_add_tail(&buf->list, &usbtv->bufs);
|
|
spin_unlock_irqrestore(&usbtv->buflock, flags);
|
|
}
|
|
|
|
static int usbtv_start_streaming(struct vb2_queue *vq, unsigned int count)
|
|
{
|
|
struct usbtv *usbtv = vb2_get_drv_priv(vq);
|
|
|
|
if (usbtv->udev == NULL)
|
|
return -ENODEV;
|
|
|
|
usbtv->last_odd = 1;
|
|
usbtv->sequence = 0;
|
|
return usbtv_start(usbtv);
|
|
}
|
|
|
|
static void usbtv_stop_streaming(struct vb2_queue *vq)
|
|
{
|
|
struct usbtv *usbtv = vb2_get_drv_priv(vq);
|
|
|
|
if (usbtv->udev)
|
|
usbtv_stop(usbtv);
|
|
}
|
|
|
|
static const struct vb2_ops usbtv_vb2_ops = {
|
|
.queue_setup = usbtv_queue_setup,
|
|
.buf_queue = usbtv_buf_queue,
|
|
.start_streaming = usbtv_start_streaming,
|
|
.stop_streaming = usbtv_stop_streaming,
|
|
};
|
|
|
|
static void usbtv_release(struct v4l2_device *v4l2_dev)
|
|
{
|
|
struct usbtv *usbtv = container_of(v4l2_dev, struct usbtv, v4l2_dev);
|
|
|
|
v4l2_device_unregister(&usbtv->v4l2_dev);
|
|
vb2_queue_release(&usbtv->vb2q);
|
|
kfree(usbtv);
|
|
}
|
|
|
|
int usbtv_video_init(struct usbtv *usbtv)
|
|
{
|
|
int ret;
|
|
|
|
(void)usbtv_configure_for_norm(usbtv, V4L2_STD_525_60);
|
|
|
|
spin_lock_init(&usbtv->buflock);
|
|
mutex_init(&usbtv->v4l2_lock);
|
|
mutex_init(&usbtv->vb2q_lock);
|
|
INIT_LIST_HEAD(&usbtv->bufs);
|
|
|
|
/* videobuf2 structure */
|
|
usbtv->vb2q.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
|
|
usbtv->vb2q.io_modes = VB2_MMAP | VB2_USERPTR | VB2_READ;
|
|
usbtv->vb2q.drv_priv = usbtv;
|
|
usbtv->vb2q.buf_struct_size = sizeof(struct usbtv_buf);
|
|
usbtv->vb2q.ops = &usbtv_vb2_ops;
|
|
usbtv->vb2q.mem_ops = &vb2_vmalloc_memops;
|
|
usbtv->vb2q.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
|
|
usbtv->vb2q.lock = &usbtv->vb2q_lock;
|
|
ret = vb2_queue_init(&usbtv->vb2q);
|
|
if (ret < 0) {
|
|
dev_warn(usbtv->dev, "Could not initialize videobuf2 queue\n");
|
|
return ret;
|
|
}
|
|
|
|
/* v4l2 structure */
|
|
usbtv->v4l2_dev.release = usbtv_release;
|
|
ret = v4l2_device_register(usbtv->dev, &usbtv->v4l2_dev);
|
|
if (ret < 0) {
|
|
dev_warn(usbtv->dev, "Could not register v4l2 device\n");
|
|
goto v4l2_fail;
|
|
}
|
|
|
|
/* Video structure */
|
|
strlcpy(usbtv->vdev.name, "usbtv", sizeof(usbtv->vdev.name));
|
|
usbtv->vdev.v4l2_dev = &usbtv->v4l2_dev;
|
|
usbtv->vdev.release = video_device_release_empty;
|
|
usbtv->vdev.fops = &usbtv_fops;
|
|
usbtv->vdev.ioctl_ops = &usbtv_ioctl_ops;
|
|
usbtv->vdev.tvnorms = USBTV_TV_STD;
|
|
usbtv->vdev.queue = &usbtv->vb2q;
|
|
usbtv->vdev.lock = &usbtv->v4l2_lock;
|
|
video_set_drvdata(&usbtv->vdev, usbtv);
|
|
ret = video_register_device(&usbtv->vdev, VFL_TYPE_GRABBER, -1);
|
|
if (ret < 0) {
|
|
dev_warn(usbtv->dev, "Could not register video device\n");
|
|
goto vdev_fail;
|
|
}
|
|
|
|
return 0;
|
|
|
|
vdev_fail:
|
|
v4l2_device_unregister(&usbtv->v4l2_dev);
|
|
v4l2_fail:
|
|
vb2_queue_release(&usbtv->vb2q);
|
|
|
|
return ret;
|
|
}
|
|
|
|
void usbtv_video_free(struct usbtv *usbtv)
|
|
{
|
|
mutex_lock(&usbtv->vb2q_lock);
|
|
mutex_lock(&usbtv->v4l2_lock);
|
|
|
|
usbtv_stop(usbtv);
|
|
video_unregister_device(&usbtv->vdev);
|
|
v4l2_device_disconnect(&usbtv->v4l2_dev);
|
|
|
|
mutex_unlock(&usbtv->v4l2_lock);
|
|
mutex_unlock(&usbtv->vb2q_lock);
|
|
|
|
v4l2_device_put(&usbtv->v4l2_dev);
|
|
}
|