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137 lines
4.1 KiB
137 lines
4.1 KiB
/* |
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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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* 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 <linux/module.h> |
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#include <linux/slab.h> |
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#include <linux/usb.h> |
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#include <media/v4l2-device.h> |
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#include <media/v4l2-ctrls.h> |
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#include <media/videobuf2-v4l2.h> |
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#include <media/videobuf2-vmalloc.h> |
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/* Hardware. */ |
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#define USBTV_VIDEO_ENDP 0x81 |
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#define USBTV_AUDIO_ENDP 0x83 |
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#define USBTV_BASE 0xc000 |
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#define USBTV_CONTROL_REG 11 |
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#define USBTV_REQUEST_REG 12 |
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/* Number of concurrent isochronous urbs submitted. |
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* Higher numbers was seen to overly saturate the USB bus. */ |
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#define USBTV_ISOC_TRANSFERS 16 |
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#define USBTV_ISOC_PACKETS 8 |
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#define USBTV_CHUNK_SIZE 256 |
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#define USBTV_CHUNK 240 |
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#define USBTV_AUDIO_URBSIZE 20480 |
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#define USBTV_AUDIO_HDRSIZE 4 |
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#define USBTV_AUDIO_BUFFER 65536 |
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/* Chunk header. */ |
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#define USBTV_MAGIC_OK(chunk) ((be32_to_cpu(chunk[0]) & 0xff000000) \ |
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== 0x88000000) |
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#define USBTV_FRAME_ID(chunk) ((be32_to_cpu(chunk[0]) & 0x00ff0000) >> 16) |
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#define USBTV_ODD(chunk) ((be32_to_cpu(chunk[0]) & 0x0000f000) >> 15) |
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#define USBTV_CHUNK_NO(chunk) (be32_to_cpu(chunk[0]) & 0x00000fff) |
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#define USBTV_TV_STD (V4L2_STD_525_60 | V4L2_STD_PAL | V4L2_STD_SECAM) |
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/* parameters for supported TV norms */ |
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struct usbtv_norm_params { |
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v4l2_std_id norm; |
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int cap_width, cap_height; |
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}; |
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/* A single videobuf2 frame buffer. */ |
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struct usbtv_buf { |
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struct vb2_v4l2_buffer vb; |
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struct list_head list; |
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}; |
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/* Per-device structure. */ |
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struct usbtv { |
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struct device *dev; |
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struct usb_device *udev; |
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/* video */ |
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struct v4l2_device v4l2_dev; |
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struct v4l2_ctrl_handler ctrl; |
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struct video_device vdev; |
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struct vb2_queue vb2q; |
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struct mutex v4l2_lock; |
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struct mutex vb2q_lock; |
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/* List of videobuf2 buffers protected by a lock. */ |
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spinlock_t buflock; |
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struct list_head bufs; |
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/* Number of currently processed frame, useful find |
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* out when a new one begins. */ |
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u32 frame_id; |
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int chunks_done; |
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enum { |
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USBTV_COMPOSITE_INPUT, |
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USBTV_SVIDEO_INPUT, |
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} input; |
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v4l2_std_id norm; |
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int width, height; |
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int n_chunks; |
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int iso_size; |
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int last_odd; |
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unsigned int sequence; |
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struct urb *isoc_urbs[USBTV_ISOC_TRANSFERS]; |
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/* audio */ |
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struct snd_card *snd; |
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struct snd_pcm_substream *snd_substream; |
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atomic_t snd_stream; |
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struct work_struct snd_trigger; |
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struct urb *snd_bulk_urb; |
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size_t snd_buffer_pos; |
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size_t snd_period_pos; |
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}; |
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int usbtv_set_regs(struct usbtv *usbtv, const u16 regs[][2], int size); |
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int usbtv_video_init(struct usbtv *usbtv); |
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void usbtv_video_free(struct usbtv *usbtv); |
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int usbtv_audio_init(struct usbtv *usbtv); |
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void usbtv_audio_free(struct usbtv *usbtv); |
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void usbtv_audio_suspend(struct usbtv *usbtv); |
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void usbtv_audio_resume(struct usbtv *usbtv);
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