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[media] usbtv: split core and video implementation
Signed-off-by: Federico Simoncelli <fsimonce@redhat.com> Reviewed-by: Lubomir Rintel <lkundrak@v3.sk> Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
This commit is contained in:
Federico Simoncelli
Mauro Carvalho Chehab
parent
c29b8f3149
commit
a3550ea665
@ -1 +1,4 @@
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usbtv-y := usbtv-core.o \
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usbtv-video.o
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obj-$(CONFIG_VIDEO_USBTV) += usbtv.o
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136
drivers/media/usb/usbtv/usbtv-core.c
Normal file
136
drivers/media/usb/usbtv/usbtv-core.c
Normal file
@ -0,0 +1,136 @@
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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/module.h>
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#include "usbtv.h"
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int usbtv_set_regs(struct usbtv *usbtv, const u16 regs[][2], int size)
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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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for (i = 0; i < size; i++) {
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u16 index = regs[i][0];
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u16 value = regs[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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static int usbtv_probe(struct usb_interface *intf,
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const struct usb_device_id *id)
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{
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int ret;
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int size;
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struct device *dev = &intf->dev;
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struct usbtv *usbtv;
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/* Checks that the device is what we think it is. */
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if (intf->num_altsetting != 2)
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return -ENODEV;
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if (intf->altsetting[1].desc.bNumEndpoints != 4)
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return -ENODEV;
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/* Packet size is split into 11 bits of base size and count of
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* extra multiplies of it.*/
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size = usb_endpoint_maxp(&intf->altsetting[1].endpoint[0].desc);
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size = (size & 0x07ff) * (((size & 0x1800) >> 11) + 1);
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/* Device structure */
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usbtv = kzalloc(sizeof(struct usbtv), GFP_KERNEL);
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if (usbtv == NULL)
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return -ENOMEM;
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usbtv->dev = dev;
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usbtv->udev = usb_get_dev(interface_to_usbdev(intf));
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usbtv->iso_size = size;
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usb_set_intfdata(intf, usbtv);
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ret = usbtv_video_init(usbtv);
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if (ret < 0)
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goto usbtv_video_fail;
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/* for simplicity we exploit the v4l2_device reference counting */
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v4l2_device_get(&usbtv->v4l2_dev);
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dev_info(dev, "Fushicai USBTV007 Video Grabber\n");
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return 0;
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usbtv_video_fail:
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kfree(usbtv);
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return ret;
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}
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static void usbtv_disconnect(struct usb_interface *intf)
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{
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struct usbtv *usbtv = usb_get_intfdata(intf);
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usb_set_intfdata(intf, NULL);
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if (!usbtv)
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return;
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usbtv_video_free(usbtv);
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usb_put_dev(usbtv->udev);
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usbtv->udev = NULL;
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/* the usbtv structure will be deallocated when v4l2 will be
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done using it */
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v4l2_device_put(&usbtv->v4l2_dev);
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}
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struct usb_device_id usbtv_id_table[] = {
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{ USB_DEVICE(0x1b71, 0x3002) },
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{}
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};
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MODULE_DEVICE_TABLE(usb, usbtv_id_table);
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MODULE_AUTHOR("Lubomir Rintel");
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MODULE_DESCRIPTION("Fushicai USBTV007 Video Grabber Driver");
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MODULE_LICENSE("Dual BSD/GPL");
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struct usb_driver usbtv_usb_driver = {
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.name = "usbtv",
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.id_table = usbtv_id_table,
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.probe = usbtv_probe,
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.disconnect = usbtv_disconnect,
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};
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module_usb_driver(usbtv_usb_driver);
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@ -28,45 +28,10 @@
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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/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_CHUNK_SIZE 256
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#define USBTV_CHUNK 240
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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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#define USBTV_TV_STD (V4L2_STD_525_60 | V4L2_STD_PAL)
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/* parameters for supported TV norms */
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struct usbtv_norm_params {
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v4l2_std_id norm;
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int cap_width, cap_height;
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};
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#include "usbtv.h"
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static struct usbtv_norm_params norm_params[] = {
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{
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@ -81,43 +46,6 @@ static struct usbtv_norm_params norm_params[] = {
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}
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};
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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 chunks_done;
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enum {
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USBTV_COMPOSITE_INPUT,
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USBTV_SVIDEO_INPUT,
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} input;
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v4l2_std_id norm;
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int width, height;
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int n_chunks;
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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_configure_for_norm(struct usbtv *usbtv, v4l2_std_id norm)
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{
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int i, ret = 0;
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@ -142,26 +70,6 @@ static int usbtv_configure_for_norm(struct usbtv *usbtv, v4l2_std_id norm)
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return ret;
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}
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static int usbtv_set_regs(struct usbtv *usbtv, const u16 regs[][2], int size)
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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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for (i = 0; i < size; i++) {
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u16 index = regs[i][0];
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u16 value = regs[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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static int usbtv_select_input(struct usbtv *usbtv, int input)
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{
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int ret;
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@ -560,12 +468,6 @@ start_fail:
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return ret;
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}
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struct usb_device_id usbtv_id_table[] = {
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{ USB_DEVICE(0x1b71, 0x3002) },
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{}
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};
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MODULE_DEVICE_TABLE(usb, usbtv_id_table);
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static int usbtv_querycap(struct file *file, void *priv,
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struct v4l2_capability *cap)
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{
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@ -759,33 +661,9 @@ static void usbtv_release(struct v4l2_device *v4l2_dev)
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kfree(usbtv);
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}
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static int usbtv_probe(struct usb_interface *intf,
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const struct usb_device_id *id)
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int usbtv_video_init(struct usbtv *usbtv)
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{
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int ret;
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int size;
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struct device *dev = &intf->dev;
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struct usbtv *usbtv;
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/* Checks that the device is what we think it is. */
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if (intf->num_altsetting != 2)
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return -ENODEV;
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if (intf->altsetting[1].desc.bNumEndpoints != 4)
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return -ENODEV;
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/* Packet size is split into 11 bits of base size and count of
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* extra multiplies of it.*/
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size = usb_endpoint_maxp(&intf->altsetting[1].endpoint[0].desc);
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size = (size & 0x07ff) * (((size & 0x1800) >> 11) + 1);
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/* Device structure */
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usbtv = kzalloc(sizeof(struct usbtv), GFP_KERNEL);
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if (usbtv == NULL)
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return -ENOMEM;
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usbtv->dev = dev;
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usbtv->udev = usb_get_dev(interface_to_usbdev(intf));
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usbtv->iso_size = size;
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(void)usbtv_configure_for_norm(usbtv, V4L2_STD_525_60);
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@ -805,20 +683,18 @@ static int usbtv_probe(struct usb_interface *intf,
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usbtv->vb2q.lock = &usbtv->vb2q_lock;
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ret = vb2_queue_init(&usbtv->vb2q);
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if (ret < 0) {
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dev_warn(dev, "Could not initialize videobuf2 queue\n");
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goto usbtv_fail;
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dev_warn(usbtv->dev, "Could not initialize videobuf2 queue\n");
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return ret;
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}
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/* v4l2 structure */
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usbtv->v4l2_dev.release = usbtv_release;
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ret = v4l2_device_register(dev, &usbtv->v4l2_dev);
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ret = v4l2_device_register(usbtv->dev, &usbtv->v4l2_dev);
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if (ret < 0) {
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dev_warn(dev, "Could not register v4l2 device\n");
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dev_warn(usbtv->dev, "Could not register v4l2 device\n");
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goto v4l2_fail;
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}
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usb_set_intfdata(intf, usbtv);
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/* Video structure */
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strlcpy(usbtv->vdev.name, "usbtv", sizeof(usbtv->vdev.name));
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usbtv->vdev.v4l2_dev = &usbtv->v4l2_dev;
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@ -832,52 +708,31 @@ static int usbtv_probe(struct usb_interface *intf,
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video_set_drvdata(&usbtv->vdev, usbtv);
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ret = video_register_device(&usbtv->vdev, VFL_TYPE_GRABBER, -1);
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if (ret < 0) {
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dev_warn(dev, "Could not register video device\n");
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dev_warn(usbtv->dev, "Could not register video device\n");
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goto vdev_fail;
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}
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dev_info(dev, "Fushicai USBTV007 Video Grabber\n");
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return 0;
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vdev_fail:
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v4l2_device_unregister(&usbtv->v4l2_dev);
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v4l2_fail:
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vb2_queue_release(&usbtv->vb2q);
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usbtv_fail:
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kfree(usbtv);
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return ret;
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}
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static void usbtv_disconnect(struct usb_interface *intf)
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void usbtv_video_free(struct usbtv *usbtv)
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{
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struct usbtv *usbtv = usb_get_intfdata(intf);
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mutex_lock(&usbtv->vb2q_lock);
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mutex_lock(&usbtv->v4l2_lock);
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usbtv_stop(usbtv);
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usb_set_intfdata(intf, NULL);
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video_unregister_device(&usbtv->vdev);
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v4l2_device_disconnect(&usbtv->v4l2_dev);
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usb_put_dev(usbtv->udev);
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usbtv->udev = NULL;
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mutex_unlock(&usbtv->v4l2_lock);
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mutex_unlock(&usbtv->vb2q_lock);
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v4l2_device_put(&usbtv->v4l2_dev);
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}
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MODULE_AUTHOR("Lubomir Rintel");
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MODULE_DESCRIPTION("Fushicai USBTV007 Video Grabber Driver");
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MODULE_LICENSE("Dual BSD/GPL");
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struct usb_driver usbtv_usb_driver = {
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.name = "usbtv",
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.id_table = usbtv_id_table,
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.probe = usbtv_probe,
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.disconnect = usbtv_disconnect,
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};
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module_usb_driver(usbtv_usb_driver);
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98
drivers/media/usb/usbtv/usbtv.h
Normal file
98
drivers/media/usb/usbtv/usbtv.h
Normal file
@ -0,0 +1,98 @@
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/*
|
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* Fushicai USBTV007 Video Grabber Driver
|
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*
|
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* 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").
|
||||
*/
|
||||
|
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#include <linux/slab.h>
|
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#include <linux/usb.h>
|
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|
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#include <media/v4l2-device.h>
|
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#include <media/videobuf2-vmalloc.h>
|
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|
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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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|
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/* Number of concurrent isochronous urbs submitted.
|
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* Higher numbers was seen to overly saturate the USB bus. */
|
||||
#define USBTV_ISOC_TRANSFERS 16
|
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#define USBTV_ISOC_PACKETS 8
|
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|
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#define USBTV_CHUNK_SIZE 256
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#define USBTV_CHUNK 240
|
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|
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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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|
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#define USBTV_TV_STD (V4L2_STD_525_60 | V4L2_STD_PAL)
|
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|
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/* parameters for supported TV norms */
|
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struct usbtv_norm_params {
|
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v4l2_std_id norm;
|
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int cap_width, cap_height;
|
||||
};
|
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|
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/* 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];
|
||||
};
|
||||
|
||||
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);
|
||||
Loading…
Reference in New Issue
Block a user