drivers/media/usb/usbtv/usbtv.h

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