Federico Simoncelli | a3550ea | 2014-01-07 19:13:21 -0300 | [diff] [blame] | 1 | /* |
Federico Simoncelli | a3550ea | 2014-01-07 19:13:21 -0300 | [diff] [blame] | 2 | * Copyright (c) 2013 Lubomir Rintel |
| 3 | * All rights reserved. |
Federico Simoncelli | a3550ea | 2014-01-07 19:13:21 -0300 | [diff] [blame] | 4 | * |
| 5 | * Redistribution and use in source and binary forms, with or without |
| 6 | * modification, are permitted provided that the following conditions |
| 7 | * are met: |
| 8 | * 1. Redistributions of source code must retain the above copyright |
| 9 | * notice, this list of conditions, and the following disclaimer, |
| 10 | * without modification. |
| 11 | * 2. The name of the author may not be used to endorse or promote products |
| 12 | * derived from this software without specific prior written permission. |
| 13 | * |
| 14 | * Alternatively, this software may be distributed under the terms of the |
| 15 | * GNU General Public License ("GPL"). |
Lubomir Rintel | 5ae1e2b | 2016-06-01 10:03:44 -0300 | [diff] [blame] | 16 | * |
| 17 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 18 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 19 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 20 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 21 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 22 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 23 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 24 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 25 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 26 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 27 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 28 | */ |
| 29 | /* |
| 30 | * Fushicai USBTV007 Audio-Video Grabber Driver |
| 31 | * |
| 32 | * Product web site: |
| 33 | * http://www.fushicai.com/products_detail/&productId=d05449ee-b690-42f9-a661-aa7353894bed.html |
| 34 | * |
| 35 | * Following LWN articles were very useful in construction of this driver: |
| 36 | * Video4Linux2 API series: http://lwn.net/Articles/203924/ |
| 37 | * videobuf2 API explanation: http://lwn.net/Articles/447435/ |
| 38 | * Thanks go to Jonathan Corbet for providing this quality documentation. |
| 39 | * He is awesome. |
| 40 | * |
| 41 | * No physical hardware was harmed running Windows during the |
| 42 | * reverse-engineering activity |
Federico Simoncelli | a3550ea | 2014-01-07 19:13:21 -0300 | [diff] [blame] | 43 | */ |
| 44 | |
Federico Simoncelli | a3550ea | 2014-01-07 19:13:21 -0300 | [diff] [blame] | 45 | #include "usbtv.h" |
| 46 | |
| 47 | int usbtv_set_regs(struct usbtv *usbtv, const u16 regs[][2], int size) |
| 48 | { |
| 49 | int ret; |
| 50 | int pipe = usb_rcvctrlpipe(usbtv->udev, 0); |
| 51 | int i; |
| 52 | |
| 53 | for (i = 0; i < size; i++) { |
| 54 | u16 index = regs[i][0]; |
| 55 | u16 value = regs[i][1]; |
| 56 | |
| 57 | ret = usb_control_msg(usbtv->udev, pipe, USBTV_REQUEST_REG, |
| 58 | USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, |
| 59 | value, index, NULL, 0, 0); |
| 60 | if (ret < 0) |
| 61 | return ret; |
| 62 | } |
| 63 | |
| 64 | return 0; |
| 65 | } |
| 66 | |
| 67 | static int usbtv_probe(struct usb_interface *intf, |
| 68 | const struct usb_device_id *id) |
| 69 | { |
| 70 | int ret; |
| 71 | int size; |
| 72 | struct device *dev = &intf->dev; |
| 73 | struct usbtv *usbtv; |
| 74 | |
| 75 | /* Checks that the device is what we think it is. */ |
| 76 | if (intf->num_altsetting != 2) |
| 77 | return -ENODEV; |
| 78 | if (intf->altsetting[1].desc.bNumEndpoints != 4) |
| 79 | return -ENODEV; |
| 80 | |
| 81 | /* Packet size is split into 11 bits of base size and count of |
| 82 | * extra multiplies of it.*/ |
| 83 | size = usb_endpoint_maxp(&intf->altsetting[1].endpoint[0].desc); |
| 84 | size = (size & 0x07ff) * (((size & 0x1800) >> 11) + 1); |
| 85 | |
| 86 | /* Device structure */ |
| 87 | usbtv = kzalloc(sizeof(struct usbtv), GFP_KERNEL); |
| 88 | if (usbtv == NULL) |
| 89 | return -ENOMEM; |
| 90 | usbtv->dev = dev; |
| 91 | usbtv->udev = usb_get_dev(interface_to_usbdev(intf)); |
| 92 | |
| 93 | usbtv->iso_size = size; |
| 94 | |
| 95 | usb_set_intfdata(intf, usbtv); |
| 96 | |
| 97 | ret = usbtv_video_init(usbtv); |
| 98 | if (ret < 0) |
| 99 | goto usbtv_video_fail; |
| 100 | |
Federico Simoncelli | 63ddf68 | 2014-08-11 18:42:22 -0300 | [diff] [blame] | 101 | ret = usbtv_audio_init(usbtv); |
| 102 | if (ret < 0) |
| 103 | goto usbtv_audio_fail; |
| 104 | |
Federico Simoncelli | a3550ea | 2014-01-07 19:13:21 -0300 | [diff] [blame] | 105 | /* for simplicity we exploit the v4l2_device reference counting */ |
| 106 | v4l2_device_get(&usbtv->v4l2_dev); |
| 107 | |
Federico Simoncelli | 63ddf68 | 2014-08-11 18:42:22 -0300 | [diff] [blame] | 108 | dev_info(dev, "Fushicai USBTV007 Audio-Video Grabber\n"); |
Federico Simoncelli | a3550ea | 2014-01-07 19:13:21 -0300 | [diff] [blame] | 109 | return 0; |
| 110 | |
Federico Simoncelli | 63ddf68 | 2014-08-11 18:42:22 -0300 | [diff] [blame] | 111 | usbtv_audio_fail: |
| 112 | usbtv_video_free(usbtv); |
| 113 | |
Federico Simoncelli | a3550ea | 2014-01-07 19:13:21 -0300 | [diff] [blame] | 114 | usbtv_video_fail: |
Alexey Khoroshilov | ebdae65 | 2014-05-23 17:47:07 -0300 | [diff] [blame] | 115 | usb_set_intfdata(intf, NULL); |
| 116 | usb_put_dev(usbtv->udev); |
Federico Simoncelli | a3550ea | 2014-01-07 19:13:21 -0300 | [diff] [blame] | 117 | kfree(usbtv); |
| 118 | |
| 119 | return ret; |
| 120 | } |
| 121 | |
| 122 | static void usbtv_disconnect(struct usb_interface *intf) |
| 123 | { |
| 124 | struct usbtv *usbtv = usb_get_intfdata(intf); |
Amber Thrall | 146af9c | 2014-09-20 01:03:15 -0300 | [diff] [blame] | 125 | |
Federico Simoncelli | a3550ea | 2014-01-07 19:13:21 -0300 | [diff] [blame] | 126 | usb_set_intfdata(intf, NULL); |
| 127 | |
| 128 | if (!usbtv) |
| 129 | return; |
| 130 | |
Federico Simoncelli | 63ddf68 | 2014-08-11 18:42:22 -0300 | [diff] [blame] | 131 | usbtv_audio_free(usbtv); |
Federico Simoncelli | a3550ea | 2014-01-07 19:13:21 -0300 | [diff] [blame] | 132 | usbtv_video_free(usbtv); |
| 133 | |
| 134 | usb_put_dev(usbtv->udev); |
| 135 | usbtv->udev = NULL; |
| 136 | |
| 137 | /* the usbtv structure will be deallocated when v4l2 will be |
| 138 | done using it */ |
| 139 | v4l2_device_put(&usbtv->v4l2_dev); |
| 140 | } |
| 141 | |
Fengguang Wu | 9b05837 | 2014-02-04 06:02:02 -0300 | [diff] [blame] | 142 | static struct usb_device_id usbtv_id_table[] = { |
Federico Simoncelli | a3550ea | 2014-01-07 19:13:21 -0300 | [diff] [blame] | 143 | { USB_DEVICE(0x1b71, 0x3002) }, |
| 144 | {} |
| 145 | }; |
| 146 | MODULE_DEVICE_TABLE(usb, usbtv_id_table); |
| 147 | |
Federico Simoncelli | 63ddf68 | 2014-08-11 18:42:22 -0300 | [diff] [blame] | 148 | MODULE_AUTHOR("Lubomir Rintel, Federico Simoncelli"); |
| 149 | MODULE_DESCRIPTION("Fushicai USBTV007 Audio-Video Grabber Driver"); |
Federico Simoncelli | a3550ea | 2014-01-07 19:13:21 -0300 | [diff] [blame] | 150 | MODULE_LICENSE("Dual BSD/GPL"); |
| 151 | |
Fengguang Wu | 9b05837 | 2014-02-04 06:02:02 -0300 | [diff] [blame] | 152 | static struct usb_driver usbtv_usb_driver = { |
Federico Simoncelli | a3550ea | 2014-01-07 19:13:21 -0300 | [diff] [blame] | 153 | .name = "usbtv", |
| 154 | .id_table = usbtv_id_table, |
| 155 | .probe = usbtv_probe, |
| 156 | .disconnect = usbtv_disconnect, |
| 157 | }; |
| 158 | |
| 159 | module_usb_driver(usbtv_usb_driver); |