diff options
Diffstat (limited to 'drivers/media/usb/usbtv/usbtv.h')
| -rw-r--r-- | drivers/media/usb/usbtv/usbtv.h | 138 |
1 files changed, 138 insertions, 0 deletions
diff --git a/drivers/media/usb/usbtv/usbtv.h b/drivers/media/usb/usbtv/usbtv.h new file mode 100644 index 000000000..b9fa7c008 --- /dev/null +++ b/drivers/media/usb/usbtv/usbtv.h @@ -0,0 +1,138 @@ +/* + * Copyright (c) 2013 Lubomir Rintel + * All rights reserved. + * + * 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"). + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ +/* + * Fushicai USBTV007 Audio-Video Grabber Driver + * + * No physical hardware was harmed running Windows during the + * reverse-engineering activity + */ + +#include <linux/module.h> +#include <linux/slab.h> +#include <linux/usb.h> + +#include <media/v4l2-device.h> +#include <media/v4l2-ctrls.h> +#include <media/videobuf2-v4l2.h> +#include <media/videobuf2-vmalloc.h> + +/* Hardware. */ +#define USBTV_VIDEO_ENDP 0x81 +#define USBTV_AUDIO_ENDP 0x83 +#define USBTV_BASE 0xc000 +#define USBTV_CONTROL_REG 11 +#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 | \ + V4L2_STD_PAL_Nc | V4L2_STD_SECAM) + +/* 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_v4l2_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 v4l2_ctrl_handler ctrl; + 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; + int last_odd; + 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); |