/* * Fushicai USBTV007 Audio-Video Grabber Driver * * Copyright (c) 2013 Lubomir Rintel * All rights reserved. * No physical hardware was harmed running Windows during the * reverse-engineering activity * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions, and the following disclaimer, * without modification. * 2. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * Alternatively, this software may be distributed under the terms of the * GNU General Public License ("GPL"). */ #include <linux/module.h> #include <linux/slab.h> #include <linux/usb.h> #include <media/v4l2-device.h> #include <media/videobuf2-vmalloc.h> /* Hardware. */ #define USBTV_VIDEO_ENDP 0x81 #define USBTV_AUDIO_ENDP 0x83 #define USBTV_BASE 0xc000 #define USBTV_REQUEST_REG 12 /* Number of concurrent isochronous urbs submitted. * Higher numbers was seen to overly saturate the USB bus. */ #define USBTV_ISOC_TRANSFERS 16 #define USBTV_ISOC_PACKETS 8 #define USBTV_CHUNK_SIZE 256 #define USBTV_CHUNK 240 #define USBTV_AUDIO_URBSIZE 20480 #define USBTV_AUDIO_HDRSIZE 4 #define USBTV_AUDIO_BUFFER 65536 /* Chunk header. */ #define USBTV_MAGIC_OK(chunk) ((be32_to_cpu(chunk[0]) & 0xff000000) \ == 0x88000000) #define USBTV_FRAME_ID(chunk) ((be32_to_cpu(chunk[0]) & 0x00ff0000) >> 16) #define USBTV_ODD(chunk) ((be32_to_cpu(chunk[0]) & 0x0000f000) >> 15) #define USBTV_CHUNK_NO(chunk) (be32_to_cpu(chunk[0]) & 0x00000fff) #define USBTV_TV_STD (V4L2_STD_525_60 | V4L2_STD_PAL) /* parameters for supported TV norms */ struct usbtv_norm_params { v4l2_std_id norm; int cap_width, cap_height; }; /* A single videobuf2 frame buffer. */ struct usbtv_buf { struct vb2_buffer vb; struct list_head list; }; /* Per-device structure. */ struct usbtv { struct device *dev; struct usb_device *udev; /* video */ struct v4l2_device v4l2_dev; struct video_device vdev; struct vb2_queue vb2q; struct mutex v4l2_lock; struct mutex vb2q_lock; /* List of videobuf2 buffers protected by a lock. */ spinlock_t buflock; struct list_head bufs; /* Number of currently processed frame, useful find * out when a new one begins. */ u32 frame_id; int chunks_done; enum { USBTV_COMPOSITE_INPUT, USBTV_SVIDEO_INPUT, } input; v4l2_std_id norm; int width, height; int n_chunks; int iso_size; unsigned int sequence; struct urb *isoc_urbs[USBTV_ISOC_TRANSFERS]; /* audio */ struct snd_card *snd; struct snd_pcm_substream *snd_substream; atomic_t snd_stream; struct work_struct snd_trigger; struct urb *snd_bulk_urb; size_t snd_buffer_pos; size_t snd_period_pos; }; int usbtv_set_regs(struct usbtv *usbtv, const u16 regs[][2], int size); int usbtv_video_init(struct usbtv *usbtv); void usbtv_video_free(struct usbtv *usbtv); int usbtv_audio_init(struct usbtv *usbtv); void usbtv_audio_free(struct usbtv *usbtv); void usbtv_audio_suspend(struct usbtv *usbtv); void usbtv_audio_resume(struct usbtv *usbtv);