drivers/media/usb/usbtv/usbtv.h

   1 /*
   2  * Copyright (c) 2013 Lubomir Rintel
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions, and the following disclaimer,
  10  *    without modification.
  11  * 2. The name of the author may not be used to endorse or promote products
  12  *    derived from this software without specific prior written permission.
  13  *
  14  * Alternatively, this software may be distributed under the terms of the
  15  * GNU General Public License ("GPL").
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  18  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  19  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  20  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  21  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  22  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  23  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  24  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  25  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  26  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  27  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  28  */
  29 /*
  30  * Fushicai USBTV007 Audio-Video Grabber Driver
  31  *
  32  * No physical hardware was harmed running Windows during the
  33  * reverse-engineering activity
  34  */
  35
  36 #include <linux/module.h>
  37 #include <linux/slab.h>
  38 #include <linux/usb.h>
  39
  40 #include <media/v4l2-device.h>
  41 #include <media/videobuf2-v4l2.h>
  42 #include <media/videobuf2-vmalloc.h>
  43
  44 /* Hardware. */
  45 #define USBTV_VIDEO_ENDP        0x81
  46 #define USBTV_AUDIO_ENDP        0x83
  47 #define USBTV_BASE              0xc000
  48 #define USBTV_REQUEST_REG       12
  49
  50 /* Number of concurrent isochronous urbs submitted.
  51  * Higher numbers was seen to overly saturate the USB bus. */
  52 #define USBTV_ISOC_TRANSFERS    16
  53 #define USBTV_ISOC_PACKETS      8
  54
  55 #define USBTV_CHUNK_SIZE        256
  56 #define USBTV_CHUNK             240
  57
  58 #define USBTV_AUDIO_URBSIZE     20480
  59 #define USBTV_AUDIO_HDRSIZE     4
  60 #define USBTV_AUDIO_BUFFER      65536
  61
  62 /* Chunk header. */
  63 #define USBTV_MAGIC_OK(chunk)   ((be32_to_cpu(chunk[0]) & 0xff000000) \
  64                                                         == 0x88000000)
  65 #define USBTV_FRAME_ID(chunk)   ((be32_to_cpu(chunk[0]) & 0x00ff0000) >> 16)
  66 #define USBTV_ODD(chunk)        ((be32_to_cpu(chunk[0]) & 0x0000f000) >> 15)
  67 #define USBTV_CHUNK_NO(chunk)   (be32_to_cpu(chunk[0]) & 0x00000fff)
  68
  69 #define USBTV_TV_STD  (V4L2_STD_525_60 | V4L2_STD_PAL)
  70
  71 /* parameters for supported TV norms */
  72 struct usbtv_norm_params {
  73         v4l2_std_id norm;
  74         int cap_width, cap_height;
  75 };
  76
  77 /* A single videobuf2 frame buffer. */
  78 struct usbtv_buf {
  79         struct vb2_v4l2_buffer vb;
  80         struct list_head list;
  81 };
  82
  83 /* Per-device structure. */
  84 struct usbtv {
  85         struct device *dev;
  86         struct usb_device *udev;
  87
  88         /* video */
  89         struct v4l2_device v4l2_dev;
  90         struct video_device vdev;
  91         struct vb2_queue vb2q;
  92         struct mutex v4l2_lock;
  93         struct mutex vb2q_lock;
  94
  95         /* List of videobuf2 buffers protected by a lock. */
  96         spinlock_t buflock;
  97         struct list_head bufs;
  98
  99         /* Number of currently processed frame, useful find
 100          * out when a new one begins. */
 101         u32 frame_id;
 102         int chunks_done;
 103
 104         enum {
 105                 USBTV_COMPOSITE_INPUT,
 106                 USBTV_SVIDEO_INPUT,
 107         } input;
 108         v4l2_std_id norm;
 109         int width, height;
 110         int n_chunks;
 111         int iso_size;
 112         int last_odd;
 113         unsigned int sequence;
 114         struct urb *isoc_urbs[USBTV_ISOC_TRANSFERS];
 115
 116         /* audio */
 117         struct snd_card *snd;
 118         struct snd_pcm_substream *snd_substream;
 119         atomic_t snd_stream;
 120         struct work_struct snd_trigger;
 121         struct urb *snd_bulk_urb;
 122         size_t snd_buffer_pos;
 123         size_t snd_period_pos;
 124 };
 125
 126 int usbtv_set_regs(struct usbtv *usbtv, const u16 regs[][2], int size);
 127
 128 int usbtv_video_init(struct usbtv *usbtv);
 129 void usbtv_video_free(struct usbtv *usbtv);
 130
 131 int usbtv_audio_init(struct usbtv *usbtv);
 132 void usbtv_audio_free(struct usbtv *usbtv);
 133 void usbtv_audio_suspend(struct usbtv *usbtv);
 134 void usbtv_audio_resume(struct usbtv *usbtv);