2 * Fushicai USBTV007 Audio-Video Grabber Driver
4 * Copyright (c) 2013 Lubomir Rintel
6 * No physical hardware was harmed running Windows during the
7 * reverse-engineering activity
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
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.
18 * Alternatively, this software may be distributed under the terms of the
19 * GNU General Public License ("GPL").
22 #include <linux/module.h>
23 #include <linux/slab.h>
24 #include <linux/usb.h>
26 #include <media/v4l2-device.h>
27 #include <media/videobuf2-vmalloc.h>
30 #define USBTV_VIDEO_ENDP 0x81
31 #define USBTV_AUDIO_ENDP 0x83
32 #define USBTV_BASE 0xc000
33 #define USBTV_REQUEST_REG 12
35 /* Number of concurrent isochronous urbs submitted.
36 * Higher numbers was seen to overly saturate the USB bus. */
37 #define USBTV_ISOC_TRANSFERS 16
38 #define USBTV_ISOC_PACKETS 8
40 #define USBTV_CHUNK_SIZE 256
41 #define USBTV_CHUNK 240
43 #define USBTV_AUDIO_URBSIZE 20480
44 #define USBTV_AUDIO_HDRSIZE 4
45 #define USBTV_AUDIO_BUFFER 65536
48 #define USBTV_MAGIC_OK(chunk) ((be32_to_cpu(chunk[0]) & 0xff000000) \
50 #define USBTV_FRAME_ID(chunk) ((be32_to_cpu(chunk[0]) & 0x00ff0000) >> 16)
51 #define USBTV_ODD(chunk) ((be32_to_cpu(chunk[0]) & 0x0000f000) >> 15)
52 #define USBTV_CHUNK_NO(chunk) (be32_to_cpu(chunk[0]) & 0x00000fff)
54 #define USBTV_TV_STD (V4L2_STD_525_60 | V4L2_STD_PAL)
56 /* parameters for supported TV norms */
57 struct usbtv_norm_params {
59 int cap_width, cap_height;
62 /* A single videobuf2 frame buffer. */
65 struct list_head list;
68 /* Per-device structure. */
71 struct usb_device *udev;
74 struct v4l2_device v4l2_dev;
75 struct video_device vdev;
76 struct vb2_queue vb2q;
77 struct mutex v4l2_lock;
78 struct mutex vb2q_lock;
80 /* List of videobuf2 buffers protected by a lock. */
82 struct list_head bufs;
84 /* Number of currently processed frame, useful find
85 * out when a new one begins. */
90 USBTV_COMPOSITE_INPUT,
97 unsigned int sequence;
98 struct urb *isoc_urbs[USBTV_ISOC_TRANSFERS];
101 struct snd_card *snd;
102 struct snd_pcm_substream *snd_substream;
104 struct work_struct snd_trigger;
105 struct urb *snd_bulk_urb;
106 size_t snd_buffer_pos;
107 size_t snd_period_pos;
110 int usbtv_set_regs(struct usbtv *usbtv, const u16 regs[][2], int size);
112 int usbtv_video_init(struct usbtv *usbtv);
113 void usbtv_video_free(struct usbtv *usbtv);
115 int usbtv_audio_init(struct usbtv *usbtv);
116 void usbtv_audio_free(struct usbtv *usbtv);
117 void usbtv_audio_suspend(struct usbtv *usbtv);
118 void usbtv_audio_resume(struct usbtv *usbtv);