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Release 4.11 drivers/media/usb/usbtv/usbtv-core.c

/*
 * 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
 *
 * Product web site:
 * http://www.fushicai.com/products_detail/&productId=d05449ee-b690-42f9-a661-aa7353894bed.html
 *
 * Following LWN articles were very useful in construction of this driver:
 * Video4Linux2 API series: http://lwn.net/Articles/203924/
 * videobuf2 API explanation: http://lwn.net/Articles/447435/
 * Thanks go to Jonathan Corbet for providing this quality documentation.
 * He is awesome.
 *
 * No physical hardware was harmed running Windows during the
 * reverse-engineering activity
 */

#include "usbtv.h"


int usbtv_set_regs(struct usbtv *usbtv, const u16 regs[][2], int size) { int ret; int pipe = usb_rcvctrlpipe(usbtv->udev, 0); int i; for (i = 0; i < size; i++) { u16 index = regs[i][0]; u16 value = regs[i][1]; ret = usb_control_msg(usbtv->udev, pipe, USBTV_REQUEST_REG, USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, value, index, NULL, 0, 0); if (ret < 0) return ret; } return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Federico Simoncelli117100.00%1100.00%
Total117100.00%1100.00%


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; struct usb_host_endpoint *ep; /* 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; ep = &intf->altsetting[1].endpoint[0]; /* Packet size is split into 11 bits of base size and count of * extra multiplies of it.*/ size = usb_endpoint_maxp(&ep->desc); size = (size & 0x07ff) * usb_endpoint_maxp_mult(&ep->desc); /* 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; usb_set_intfdata(intf, usbtv); ret = usbtv_video_init(usbtv); if (ret < 0) goto usbtv_video_fail; ret = usbtv_audio_init(usbtv); if (ret < 0) goto usbtv_audio_fail; /* for simplicity we exploit the v4l2_device reference counting */ v4l2_device_get(&usbtv->v4l2_dev); dev_info(dev, "Fushicai USBTV007 Audio-Video Grabber\n"); return 0; usbtv_audio_fail: usbtv_video_free(usbtv); usbtv_video_fail: usb_set_intfdata(intf, NULL); usb_put_dev(usbtv->udev); kfree(usbtv); return ret; }

Contributors

PersonTokensPropCommitsCommitProp
Federico Simoncelli21986.22%250.00%
Felipe Balbi218.27%125.00%
Alexey Khoroshilov145.51%125.00%
Total254100.00%4100.00%


static void usbtv_disconnect(struct usb_interface *intf) { struct usbtv *usbtv = usb_get_intfdata(intf); usb_set_intfdata(intf, NULL); if (!usbtv) return; usbtv_audio_free(usbtv); usbtv_video_free(usbtv); usb_put_dev(usbtv->udev); usbtv->udev = NULL; /* the usbtv structure will be deallocated when v4l2 will be done using it */ v4l2_device_put(&usbtv->v4l2_dev); }

Contributors

PersonTokensPropCommitsCommitProp
Federico Simoncelli66100.00%2100.00%
Total66100.00%2100.00%

static struct usb_device_id usbtv_id_table[] = { { USB_DEVICE(0x1b71, 0x3002) }, {} }; MODULE_DEVICE_TABLE(usb, usbtv_id_table); MODULE_AUTHOR("Lubomir Rintel, Federico Simoncelli"); MODULE_DESCRIPTION("Fushicai USBTV007 Audio-Video Grabber Driver"); MODULE_LICENSE("Dual BSD/GPL"); static 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);

Overall Contributors

PersonTokensPropCommitsCommitProp
Federico Simoncelli47692.43%233.33%
Felipe Balbi214.08%116.67%
Alexey Khoroshilov142.72%116.67%
Fengguang Wu20.39%116.67%
Lubomir Rintel20.39%116.67%
Total515100.00%6100.00%
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