[media] usbtv: Add driver for Fushicai USBTV007 video frame grabber
Reverse-engineered driver for cheapo video digitizer, made from observations of Windows XP driver. The protocol is not yet completely understood, so far we don't provide any controls, only support a single format out of three and don't support the audio device. Signed-off-by: Lubomir Rintel <lkundrak@v3.sk> Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Lubomir Rintel
Mauro Carvalho Chehab
parent
8fc350abc6
commit
f3d27f34fd
@ -18,6 +18,7 @@ source "drivers/media/usb/zr364xx/Kconfig"
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source "drivers/media/usb/stkwebcam/Kconfig"
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source "drivers/media/usb/s2255/Kconfig"
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source "drivers/media/usb/sn9c102/Kconfig"
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source "drivers/media/usb/usbtv/Kconfig"
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endif
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if MEDIA_ANALOG_TV_SUPPORT
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@ -20,3 +20,4 @@ obj-$(CONFIG_VIDEO_STK1160) += stk1160/
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obj-$(CONFIG_VIDEO_CX231XX) += cx231xx/
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obj-$(CONFIG_VIDEO_TM6000) += tm6000/
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obj-$(CONFIG_VIDEO_EM28XX) += em28xx/
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obj-$(CONFIG_VIDEO_USBTV) += usbtv/
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10
drivers/media/usb/usbtv/Kconfig
Normal file
10
drivers/media/usb/usbtv/Kconfig
Normal file
@ -0,0 +1,10 @@
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config VIDEO_USBTV
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tristate "USBTV007 video capture support"
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depends on VIDEO_DEV
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select VIDEOBUF2_VMALLOC
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---help---
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This is a video4linux2 driver for USBTV007 based video capture devices.
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To compile this driver as a module, choose M here: the
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module will be called usbtv
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1
drivers/media/usb/usbtv/Makefile
Normal file
1
drivers/media/usb/usbtv/Makefile
Normal file
@ -0,0 +1 @@
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obj-$(CONFIG_VIDEO_USBTV) += usbtv.o
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696
drivers/media/usb/usbtv/usbtv.c
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696
drivers/media/usb/usbtv/usbtv.c
Normal file
@ -0,0 +1,696 @@
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/*
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* Fushicai USBTV007 Video Grabber Driver
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*
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* Product web site:
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* http://www.fushicai.com/products_detail/&productId=d05449ee-b690-42f9-a661-aa7353894bed.html
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*
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* Following LWN articles were very useful in construction of this driver:
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* Video4Linux2 API series: http://lwn.net/Articles/203924/
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* videobuf2 API explanation: http://lwn.net/Articles/447435/
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* Thanks go to Jonathan Corbet for providing this quality documentation.
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* He is awesome.
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*
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* Copyright (c) 2013 Lubomir Rintel
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* All rights reserved.
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* No physical hardware was harmed running Windows during the
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* reverse-engineering activity
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL").
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*/
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#include <linux/init.h>
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#include <linux/list.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/usb.h>
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#include <linux/version.h>
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#include <linux/videodev2.h>
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#include <media/v4l2-device.h>
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#include <media/v4l2-ioctl.h>
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#include <media/videobuf2-core.h>
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#include <media/videobuf2-vmalloc.h>
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/* Hardware. */
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#define USBTV_VIDEO_ENDP 0x81
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#define USBTV_BASE 0xc000
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#define USBTV_REQUEST_REG 12
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/* Number of concurrent isochronous urbs submitted.
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* Higher numbers was seen to overly saturate the USB bus. */
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#define USBTV_ISOC_TRANSFERS 16
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#define USBTV_ISOC_PACKETS 8
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#define USBTV_WIDTH 720
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#define USBTV_HEIGHT 480
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#define USBTV_CHUNK_SIZE 256
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#define USBTV_CHUNK 240
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#define USBTV_CHUNKS (USBTV_WIDTH * USBTV_HEIGHT \
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/ 2 / USBTV_CHUNK)
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/* Chunk header. */
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#define USBTV_MAGIC_OK(chunk) ((be32_to_cpu(chunk[0]) & 0xff000000) \
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== 0x88000000)
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#define USBTV_FRAME_ID(chunk) ((be32_to_cpu(chunk[0]) & 0x00ff0000) >> 16)
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#define USBTV_ODD(chunk) ((be32_to_cpu(chunk[0]) & 0x0000f000) >> 15)
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#define USBTV_CHUNK_NO(chunk) (be32_to_cpu(chunk[0]) & 0x00000fff)
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/* A single videobuf2 frame buffer. */
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struct usbtv_buf {
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struct vb2_buffer vb;
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struct list_head list;
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};
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/* Per-device structure. */
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struct usbtv {
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struct device *dev;
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struct usb_device *udev;
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struct v4l2_device v4l2_dev;
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struct video_device vdev;
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struct vb2_queue vb2q;
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struct mutex v4l2_lock;
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struct mutex vb2q_lock;
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/* List of videobuf2 buffers protected by a lock. */
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spinlock_t buflock;
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struct list_head bufs;
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/* Number of currently processed frame, useful find
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* out when a new one begins. */
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u32 frame_id;
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int iso_size;
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unsigned int sequence;
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struct urb *isoc_urbs[USBTV_ISOC_TRANSFERS];
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};
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static int usbtv_setup_capture(struct usbtv *usbtv)
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{
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int ret;
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int pipe = usb_rcvctrlpipe(usbtv->udev, 0);
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int i;
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static const u16 protoregs[][2] = {
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/* These seem to enable the device. */
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{ USBTV_BASE + 0x0008, 0x0001 },
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{ USBTV_BASE + 0x01d0, 0x00ff },
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{ USBTV_BASE + 0x01d9, 0x0002 },
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/* These seem to influence color parameters, such as
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* brightness, etc. */
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{ USBTV_BASE + 0x0239, 0x0040 },
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{ USBTV_BASE + 0x0240, 0x0000 },
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{ USBTV_BASE + 0x0241, 0x0000 },
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{ USBTV_BASE + 0x0242, 0x0002 },
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{ USBTV_BASE + 0x0243, 0x0080 },
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{ USBTV_BASE + 0x0244, 0x0012 },
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{ USBTV_BASE + 0x0245, 0x0090 },
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{ USBTV_BASE + 0x0246, 0x0000 },
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{ USBTV_BASE + 0x0278, 0x002d },
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{ USBTV_BASE + 0x0279, 0x000a },
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{ USBTV_BASE + 0x027a, 0x0032 },
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{ 0xf890, 0x000c },
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{ 0xf894, 0x0086 },
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{ USBTV_BASE + 0x00ac, 0x00c0 },
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{ USBTV_BASE + 0x00ad, 0x0000 },
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{ USBTV_BASE + 0x00a2, 0x0012 },
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{ USBTV_BASE + 0x00a3, 0x00e0 },
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{ USBTV_BASE + 0x00a4, 0x0028 },
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{ USBTV_BASE + 0x00a5, 0x0082 },
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{ USBTV_BASE + 0x00a7, 0x0080 },
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{ USBTV_BASE + 0x0000, 0x0014 },
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{ USBTV_BASE + 0x0006, 0x0003 },
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{ USBTV_BASE + 0x0090, 0x0099 },
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{ USBTV_BASE + 0x0091, 0x0090 },
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{ USBTV_BASE + 0x0094, 0x0068 },
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{ USBTV_BASE + 0x0095, 0x0070 },
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{ USBTV_BASE + 0x009c, 0x0030 },
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{ USBTV_BASE + 0x009d, 0x00c0 },
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{ USBTV_BASE + 0x009e, 0x00e0 },
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{ USBTV_BASE + 0x0019, 0x0006 },
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{ USBTV_BASE + 0x008c, 0x00ba },
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{ USBTV_BASE + 0x0101, 0x00ff },
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{ USBTV_BASE + 0x010c, 0x00b3 },
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{ USBTV_BASE + 0x01b2, 0x0080 },
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{ USBTV_BASE + 0x01b4, 0x00a0 },
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{ USBTV_BASE + 0x014c, 0x00ff },
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{ USBTV_BASE + 0x014d, 0x00ca },
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{ USBTV_BASE + 0x0113, 0x0053 },
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{ USBTV_BASE + 0x0119, 0x008a },
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{ USBTV_BASE + 0x013c, 0x0003 },
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{ USBTV_BASE + 0x0150, 0x009c },
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{ USBTV_BASE + 0x0151, 0x0071 },
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{ USBTV_BASE + 0x0152, 0x00c6 },
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{ USBTV_BASE + 0x0153, 0x0084 },
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{ USBTV_BASE + 0x0154, 0x00bc },
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{ USBTV_BASE + 0x0155, 0x00a0 },
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{ USBTV_BASE + 0x0156, 0x00a0 },
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{ USBTV_BASE + 0x0157, 0x009c },
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{ USBTV_BASE + 0x0158, 0x001f },
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{ USBTV_BASE + 0x0159, 0x0006 },
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{ USBTV_BASE + 0x015d, 0x0000 },
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{ USBTV_BASE + 0x0284, 0x0088 },
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{ USBTV_BASE + 0x0003, 0x0004 },
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{ USBTV_BASE + 0x001a, 0x0079 },
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{ USBTV_BASE + 0x0100, 0x00d3 },
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{ USBTV_BASE + 0x010e, 0x0068 },
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{ USBTV_BASE + 0x010f, 0x009c },
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{ USBTV_BASE + 0x0112, 0x00f0 },
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{ USBTV_BASE + 0x0115, 0x0015 },
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{ USBTV_BASE + 0x0117, 0x0000 },
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{ USBTV_BASE + 0x0118, 0x00fc },
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{ USBTV_BASE + 0x012d, 0x0004 },
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{ USBTV_BASE + 0x012f, 0x0008 },
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{ USBTV_BASE + 0x0220, 0x002e },
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{ USBTV_BASE + 0x0225, 0x0008 },
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{ USBTV_BASE + 0x024e, 0x0002 },
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{ USBTV_BASE + 0x024f, 0x0001 },
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{ USBTV_BASE + 0x0254, 0x005f },
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{ USBTV_BASE + 0x025a, 0x0012 },
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{ USBTV_BASE + 0x025b, 0x0001 },
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{ USBTV_BASE + 0x0263, 0x001c },
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{ USBTV_BASE + 0x0266, 0x0011 },
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{ USBTV_BASE + 0x0267, 0x0005 },
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{ USBTV_BASE + 0x024e, 0x0002 },
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{ USBTV_BASE + 0x024f, 0x0002 },
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};
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for (i = 0; i < ARRAY_SIZE(protoregs); i++) {
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u16 index = protoregs[i][0];
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u16 value = protoregs[i][1];
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ret = usb_control_msg(usbtv->udev, pipe, USBTV_REQUEST_REG,
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USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
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value, index, NULL, 0, 0);
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if (ret < 0)
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return ret;
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}
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return 0;
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}
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/* Called for each 256-byte image chunk.
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* First word identifies the chunk, followed by 240 words of image
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* data and padding. */
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static void usbtv_image_chunk(struct usbtv *usbtv, u32 *chunk)
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{
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int frame_id, odd, chunk_no;
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u32 *frame;
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struct usbtv_buf *buf;
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unsigned long flags;
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/* Ignore corrupted lines. */
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if (!USBTV_MAGIC_OK(chunk))
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return;
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frame_id = USBTV_FRAME_ID(chunk);
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odd = USBTV_ODD(chunk);
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chunk_no = USBTV_CHUNK_NO(chunk);
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/* Deinterlace. TODO: Use interlaced frame format. */
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chunk_no = (chunk_no - chunk_no % 3) * 2 + chunk_no % 3;
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chunk_no += !odd * 3;
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if (chunk_no >= USBTV_CHUNKS)
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return;
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/* Beginning of a frame. */
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if (chunk_no == 0)
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usbtv->frame_id = frame_id;
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spin_lock_irqsave(&usbtv->buflock, flags);
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if (list_empty(&usbtv->bufs)) {
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/* No free buffers. Userspace likely too slow. */
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spin_unlock_irqrestore(&usbtv->buflock, flags);
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return;
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}
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/* First available buffer. */
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buf = list_first_entry(&usbtv->bufs, struct usbtv_buf, list);
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frame = vb2_plane_vaddr(&buf->vb, 0);
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/* Copy the chunk. */
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memcpy(&frame[chunk_no * USBTV_CHUNK], &chunk[1],
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USBTV_CHUNK * sizeof(chunk[1]));
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/* Last chunk in a frame, signalling an end */
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if (usbtv->frame_id && chunk_no == USBTV_CHUNKS-1) {
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int size = vb2_plane_size(&buf->vb, 0);
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buf->vb.v4l2_buf.field = V4L2_FIELD_INTERLACED;
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buf->vb.v4l2_buf.sequence = usbtv->sequence++;
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v4l2_get_timestamp(&buf->vb.v4l2_buf.timestamp);
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vb2_set_plane_payload(&buf->vb, 0, size);
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vb2_buffer_done(&buf->vb, VB2_BUF_STATE_DONE);
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list_del(&buf->list);
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}
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spin_unlock_irqrestore(&usbtv->buflock, flags);
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}
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/* Got image data. Each packet contains a number of 256-word chunks we
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* compose the image from. */
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static void usbtv_iso_cb(struct urb *ip)
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{
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int ret;
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int i;
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struct usbtv *usbtv = (struct usbtv *)ip->context;
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switch (ip->status) {
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/* All fine. */
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case 0:
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break;
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/* Device disconnected or capture stopped? */
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case -ENODEV:
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case -ENOENT:
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case -ECONNRESET:
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case -ESHUTDOWN:
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return;
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/* Unknown error. Retry. */
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default:
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dev_warn(usbtv->dev, "Bad response for ISO request.\n");
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goto resubmit;
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}
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for (i = 0; i < ip->number_of_packets; i++) {
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int size = ip->iso_frame_desc[i].actual_length;
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unsigned char *data = ip->transfer_buffer +
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ip->iso_frame_desc[i].offset;
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int offset;
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for (offset = 0; USBTV_CHUNK_SIZE * offset < size; offset++)
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usbtv_image_chunk(usbtv,
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(u32 *)&data[USBTV_CHUNK_SIZE * offset]);
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}
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resubmit:
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ret = usb_submit_urb(ip, GFP_ATOMIC);
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if (ret < 0)
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dev_warn(usbtv->dev, "Could not resubmit ISO URB\n");
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}
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static struct urb *usbtv_setup_iso_transfer(struct usbtv *usbtv)
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{
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struct urb *ip;
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int size = usbtv->iso_size;
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int i;
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ip = usb_alloc_urb(USBTV_ISOC_PACKETS, GFP_KERNEL);
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if (ip == NULL)
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return NULL;
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ip->dev = usbtv->udev;
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ip->context = usbtv;
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ip->pipe = usb_rcvisocpipe(usbtv->udev, USBTV_VIDEO_ENDP);
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ip->interval = 1;
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ip->transfer_flags = URB_ISO_ASAP;
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ip->transfer_buffer = kzalloc(size * USBTV_ISOC_PACKETS,
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GFP_KERNEL);
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ip->complete = usbtv_iso_cb;
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ip->number_of_packets = USBTV_ISOC_PACKETS;
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ip->transfer_buffer_length = size * USBTV_ISOC_PACKETS;
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for (i = 0; i < USBTV_ISOC_PACKETS; i++) {
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ip->iso_frame_desc[i].offset = size * i;
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ip->iso_frame_desc[i].length = size;
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}
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return ip;
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}
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static void usbtv_stop(struct usbtv *usbtv)
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{
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int i;
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unsigned long flags;
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/* Cancel running transfers. */
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for (i = 0; i < USBTV_ISOC_TRANSFERS; i++) {
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struct urb *ip = usbtv->isoc_urbs[i];
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if (ip == NULL)
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continue;
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usb_kill_urb(ip);
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kfree(ip->transfer_buffer);
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usb_free_urb(ip);
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usbtv->isoc_urbs[i] = NULL;
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}
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/* Return buffers to userspace. */
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spin_lock_irqsave(&usbtv->buflock, flags);
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while (!list_empty(&usbtv->bufs)) {
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struct usbtv_buf *buf = list_first_entry(&usbtv->bufs,
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struct usbtv_buf, list);
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vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR);
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list_del(&buf->list);
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}
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spin_unlock_irqrestore(&usbtv->buflock, flags);
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}
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static int usbtv_start(struct usbtv *usbtv)
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{
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int i;
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int ret;
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ret = usb_set_interface(usbtv->udev, 0, 0);
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if (ret < 0)
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return ret;
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ret = usbtv_setup_capture(usbtv);
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if (ret < 0)
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return ret;
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ret = usb_set_interface(usbtv->udev, 0, 1);
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if (ret < 0)
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return ret;
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for (i = 0; i < USBTV_ISOC_TRANSFERS; i++) {
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struct urb *ip;
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ip = usbtv_setup_iso_transfer(usbtv);
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if (ip == NULL) {
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ret = -ENOMEM;
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||||
goto start_fail;
|
||||
}
|
||||
usbtv->isoc_urbs[i] = ip;
|
||||
|
||||
ret = usb_submit_urb(ip, GFP_KERNEL);
|
||||
if (ret < 0)
|
||||
goto start_fail;
|
||||
}
|
||||
|
||||
return 0;
|
||||
|
||||
start_fail:
|
||||
usbtv_stop(usbtv);
|
||||
return ret;
|
||||
}
|
||||
|
||||
struct usb_device_id usbtv_id_table[] = {
|
||||
{ USB_DEVICE(0x1b71, 0x3002) },
|
||||
{}
|
||||
};
|
||||
MODULE_DEVICE_TABLE(usb, usbtv_id_table);
|
||||
|
||||
static int usbtv_querycap(struct file *file, void *priv,
|
||||
struct v4l2_capability *cap)
|
||||
{
|
||||
struct usbtv *dev = video_drvdata(file);
|
||||
|
||||
strlcpy(cap->driver, "usbtv", sizeof(cap->driver));
|
||||
strlcpy(cap->card, "usbtv", sizeof(cap->card));
|
||||
usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info));
|
||||
cap->device_caps = V4L2_CAP_VIDEO_CAPTURE;
|
||||
cap->device_caps |= V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
|
||||
cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int usbtv_enum_input(struct file *file, void *priv,
|
||||
struct v4l2_input *i)
|
||||
{
|
||||
if (i->index > 0)
|
||||
return -EINVAL;
|
||||
|
||||
strlcpy(i->name, "Composite", sizeof(i->name));
|
||||
i->type = V4L2_INPUT_TYPE_CAMERA;
|
||||
i->std = V4L2_STD_525_60;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int usbtv_enum_fmt_vid_cap(struct file *file, void *priv,
|
||||
struct v4l2_fmtdesc *f)
|
||||
{
|
||||
if (f->index > 0)
|
||||
return -EINVAL;
|
||||
|
||||
strlcpy(f->description, "16 bpp YUY2, 4:2:2, packed",
|
||||
sizeof(f->description));
|
||||
f->pixelformat = V4L2_PIX_FMT_YUYV;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int usbtv_fmt_vid_cap(struct file *file, void *priv,
|
||||
struct v4l2_format *f)
|
||||
{
|
||||
f->fmt.pix.width = USBTV_WIDTH;
|
||||
f->fmt.pix.height = USBTV_HEIGHT;
|
||||
f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
|
||||
f->fmt.pix.field = V4L2_FIELD_INTERLACED;
|
||||
f->fmt.pix.bytesperline = USBTV_WIDTH * 2;
|
||||
f->fmt.pix.sizeimage = (f->fmt.pix.bytesperline * f->fmt.pix.height);
|
||||
f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
|
||||
f->fmt.pix.priv = 0;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int usbtv_g_std(struct file *file, void *priv, v4l2_std_id *norm)
|
||||
{
|
||||
*norm = V4L2_STD_525_60;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int usbtv_g_input(struct file *file, void *priv, unsigned int *i)
|
||||
{
|
||||
*i = 0;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int usbtv_s_input(struct file *file, void *priv, unsigned int i)
|
||||
{
|
||||
if (i > 0)
|
||||
return -EINVAL;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int usbtv_s_std(struct file *file, void *priv, v4l2_std_id norm)
|
||||
{
|
||||
if (norm & V4L2_STD_525_60)
|
||||
return 0;
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
struct v4l2_ioctl_ops usbtv_ioctl_ops = {
|
||||
.vidioc_querycap = usbtv_querycap,
|
||||
.vidioc_enum_input = usbtv_enum_input,
|
||||
.vidioc_enum_fmt_vid_cap = usbtv_enum_fmt_vid_cap,
|
||||
.vidioc_g_fmt_vid_cap = usbtv_fmt_vid_cap,
|
||||
.vidioc_try_fmt_vid_cap = usbtv_fmt_vid_cap,
|
||||
.vidioc_s_fmt_vid_cap = usbtv_fmt_vid_cap,
|
||||
.vidioc_g_std = usbtv_g_std,
|
||||
.vidioc_s_std = usbtv_s_std,
|
||||
.vidioc_g_input = usbtv_g_input,
|
||||
.vidioc_s_input = usbtv_s_input,
|
||||
|
||||
.vidioc_reqbufs = vb2_ioctl_reqbufs,
|
||||
.vidioc_prepare_buf = vb2_ioctl_prepare_buf,
|
||||
.vidioc_querybuf = vb2_ioctl_querybuf,
|
||||
.vidioc_create_bufs = vb2_ioctl_create_bufs,
|
||||
.vidioc_qbuf = vb2_ioctl_qbuf,
|
||||
.vidioc_dqbuf = vb2_ioctl_dqbuf,
|
||||
.vidioc_streamon = vb2_ioctl_streamon,
|
||||
.vidioc_streamoff = vb2_ioctl_streamoff,
|
||||
};
|
||||
|
||||
struct v4l2_file_operations usbtv_fops = {
|
||||
.owner = THIS_MODULE,
|
||||
.unlocked_ioctl = video_ioctl2,
|
||||
.mmap = vb2_fop_mmap,
|
||||
.open = v4l2_fh_open,
|
||||
.release = vb2_fop_release,
|
||||
.read = vb2_fop_read,
|
||||
.poll = vb2_fop_poll,
|
||||
};
|
||||
|
||||
static int usbtv_queue_setup(struct vb2_queue *vq,
|
||||
const struct v4l2_format *v4l_fmt, unsigned int *nbuffers,
|
||||
unsigned int *nplanes, unsigned int sizes[], void *alloc_ctxs[])
|
||||
{
|
||||
if (*nbuffers < 2)
|
||||
*nbuffers = 2;
|
||||
*nplanes = 1;
|
||||
sizes[0] = USBTV_CHUNK * USBTV_CHUNKS * sizeof(u32);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void usbtv_buf_queue(struct vb2_buffer *vb)
|
||||
{
|
||||
struct usbtv *usbtv = vb2_get_drv_priv(vb->vb2_queue);
|
||||
struct usbtv_buf *buf = container_of(vb, struct usbtv_buf, vb);
|
||||
unsigned long flags;
|
||||
|
||||
if (usbtv->udev == NULL) {
|
||||
vb2_buffer_done(vb, VB2_BUF_STATE_ERROR);
|
||||
return;
|
||||
}
|
||||
|
||||
spin_lock_irqsave(&usbtv->buflock, flags);
|
||||
list_add_tail(&buf->list, &usbtv->bufs);
|
||||
spin_unlock_irqrestore(&usbtv->buflock, flags);
|
||||
}
|
||||
|
||||
static int usbtv_start_streaming(struct vb2_queue *vq, unsigned int count)
|
||||
{
|
||||
struct usbtv *usbtv = vb2_get_drv_priv(vq);
|
||||
|
||||
if (usbtv->udev == NULL)
|
||||
return -ENODEV;
|
||||
|
||||
return usbtv_start(usbtv);
|
||||
}
|
||||
|
||||
static int usbtv_stop_streaming(struct vb2_queue *vq)
|
||||
{
|
||||
struct usbtv *usbtv = vb2_get_drv_priv(vq);
|
||||
|
||||
if (usbtv->udev == NULL)
|
||||
return -ENODEV;
|
||||
|
||||
usbtv_stop(usbtv);
|
||||
return 0;
|
||||
}
|
||||
|
||||
struct vb2_ops usbtv_vb2_ops = {
|
||||
.queue_setup = usbtv_queue_setup,
|
||||
.buf_queue = usbtv_buf_queue,
|
||||
.start_streaming = usbtv_start_streaming,
|
||||
.stop_streaming = usbtv_stop_streaming,
|
||||
};
|
||||
|
||||
static void usbtv_release(struct v4l2_device *v4l2_dev)
|
||||
{
|
||||
struct usbtv *usbtv = container_of(v4l2_dev, struct usbtv, v4l2_dev);
|
||||
|
||||
v4l2_device_unregister(&usbtv->v4l2_dev);
|
||||
vb2_queue_release(&usbtv->vb2q);
|
||||
kfree(usbtv);
|
||||
}
|
||||
|
||||
static int usbtv_probe(struct usb_interface *intf,
|
||||
const struct usb_device_id *id)
|
||||
{
|
||||
int ret;
|
||||
int size;
|
||||
struct device *dev = &intf->dev;
|
||||
struct usbtv *usbtv;
|
||||
|
||||
/* Checks that the device is what we think it is. */
|
||||
if (intf->num_altsetting != 2)
|
||||
return -ENODEV;
|
||||
if (intf->altsetting[1].desc.bNumEndpoints != 4)
|
||||
return -ENODEV;
|
||||
|
||||
/* Packet size is split into 11 bits of base size and count of
|
||||
* extra multiplies of it.*/
|
||||
size = usb_endpoint_maxp(&intf->altsetting[1].endpoint[0].desc);
|
||||
size = (size & 0x07ff) * (((size & 0x1800) >> 11) + 1);
|
||||
|
||||
/* Device structure */
|
||||
usbtv = kzalloc(sizeof(struct usbtv), GFP_KERNEL);
|
||||
if (usbtv == NULL)
|
||||
return -ENOMEM;
|
||||
usbtv->dev = dev;
|
||||
usbtv->udev = usb_get_dev(interface_to_usbdev(intf));
|
||||
usbtv->iso_size = size;
|
||||
spin_lock_init(&usbtv->buflock);
|
||||
mutex_init(&usbtv->v4l2_lock);
|
||||
mutex_init(&usbtv->vb2q_lock);
|
||||
INIT_LIST_HEAD(&usbtv->bufs);
|
||||
|
||||
/* videobuf2 structure */
|
||||
usbtv->vb2q.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
|
||||
usbtv->vb2q.io_modes = VB2_MMAP | VB2_USERPTR | VB2_READ;
|
||||
usbtv->vb2q.drv_priv = usbtv;
|
||||
usbtv->vb2q.buf_struct_size = sizeof(struct usbtv_buf);
|
||||
usbtv->vb2q.ops = &usbtv_vb2_ops;
|
||||
usbtv->vb2q.mem_ops = &vb2_vmalloc_memops;
|
||||
usbtv->vb2q.timestamp_type = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
|
||||
usbtv->vb2q.lock = &usbtv->vb2q_lock;
|
||||
ret = vb2_queue_init(&usbtv->vb2q);
|
||||
if (ret < 0) {
|
||||
dev_warn(dev, "Could not initialize videobuf2 queue\n");
|
||||
goto usbtv_fail;
|
||||
}
|
||||
|
||||
/* v4l2 structure */
|
||||
usbtv->v4l2_dev.release = usbtv_release;
|
||||
ret = v4l2_device_register(dev, &usbtv->v4l2_dev);
|
||||
if (ret < 0) {
|
||||
dev_warn(dev, "Could not register v4l2 device\n");
|
||||
goto v4l2_fail;
|
||||
}
|
||||
|
||||
usb_set_intfdata(intf, usbtv);
|
||||
|
||||
/* Video structure */
|
||||
strlcpy(usbtv->vdev.name, "usbtv", sizeof(usbtv->vdev.name));
|
||||
usbtv->vdev.v4l2_dev = &usbtv->v4l2_dev;
|
||||
usbtv->vdev.release = video_device_release_empty;
|
||||
usbtv->vdev.fops = &usbtv_fops;
|
||||
usbtv->vdev.ioctl_ops = &usbtv_ioctl_ops;
|
||||
usbtv->vdev.tvnorms = V4L2_STD_525_60;
|
||||
usbtv->vdev.queue = &usbtv->vb2q;
|
||||
usbtv->vdev.lock = &usbtv->v4l2_lock;
|
||||
set_bit(V4L2_FL_USE_FH_PRIO, &usbtv->vdev.flags);
|
||||
video_set_drvdata(&usbtv->vdev, usbtv);
|
||||
ret = video_register_device(&usbtv->vdev, VFL_TYPE_GRABBER, -1);
|
||||
if (ret < 0) {
|
||||
dev_warn(dev, "Could not register video device\n");
|
||||
goto vdev_fail;
|
||||
}
|
||||
|
||||
dev_info(dev, "Fushicai USBTV007 Video Grabber\n");
|
||||
return 0;
|
||||
|
||||
vdev_fail:
|
||||
v4l2_device_unregister(&usbtv->v4l2_dev);
|
||||
v4l2_fail:
|
||||
vb2_queue_release(&usbtv->vb2q);
|
||||
usbtv_fail:
|
||||
kfree(usbtv);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static void usbtv_disconnect(struct usb_interface *intf)
|
||||
{
|
||||
struct usbtv *usbtv = usb_get_intfdata(intf);
|
||||
|
||||
mutex_lock(&usbtv->vb2q_lock);
|
||||
mutex_lock(&usbtv->v4l2_lock);
|
||||
|
||||
usbtv_stop(usbtv);
|
||||
usb_set_intfdata(intf, NULL);
|
||||
video_unregister_device(&usbtv->vdev);
|
||||
v4l2_device_disconnect(&usbtv->v4l2_dev);
|
||||
usb_put_dev(usbtv->udev);
|
||||
usbtv->udev = NULL;
|
||||
|
||||
mutex_unlock(&usbtv->v4l2_lock);
|
||||
mutex_unlock(&usbtv->vb2q_lock);
|
||||
|
||||
v4l2_device_put(&usbtv->v4l2_dev);
|
||||
}
|
||||
|
||||
MODULE_AUTHOR("Lubomir Rintel");
|
||||
MODULE_DESCRIPTION("Fushicai USBTV007 Video Grabber Driver");
|
||||
MODULE_LICENSE("Dual BSD/GPL");
|
||||
|
||||
struct usb_driver usbtv_usb_driver = {
|
||||
.name = "usbtv",
|
||||
.id_table = usbtv_id_table,
|
||||
.probe = usbtv_probe,
|
||||
.disconnect = usbtv_disconnect,
|
||||
};
|
||||
|
||||
module_usb_driver(usbtv_usb_driver);
|
||||
Loading…
Reference in New Issue
Block a user