/* * Copyright (c) 2013,2016 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 #include #include "usbtv.h" static struct usbtv_norm_params norm_params[] = { { .norm = V4L2_STD_525_60, .cap_width = 720, .cap_height = 480, }, { .norm = V4L2_STD_PAL, .cap_width = 720, .cap_height = 576, } }; static int usbtv_configure_for_norm(struct usbtv *usbtv, v4l2_std_id norm) { int i, ret = 0; struct usbtv_norm_params *params = NULL; for (i = 0; i < ARRAY_SIZE(norm_params); i++) { if (norm_params[i].norm & norm) { params = &norm_params[i]; break; } } if (params) { usbtv->width = params->cap_width; usbtv->height = params->cap_height; usbtv->n_chunks = usbtv->width * usbtv->height / 4 / USBTV_CHUNK; usbtv->norm = params->norm; } else ret = -EINVAL; return ret; } static int usbtv_select_input(struct usbtv *usbtv, int input) { int ret; static const u16 composite[][2] = { { USBTV_BASE + 0x0105, 0x0060 }, { USBTV_BASE + 0x011f, 0x00f2 }, { USBTV_BASE + 0x0127, 0x0060 }, { USBTV_BASE + 0x00ae, 0x0010 }, { USBTV_BASE + 0x0239, 0x0060 }, }; static const u16 svideo[][2] = { { USBTV_BASE + 0x0105, 0x0010 }, { USBTV_BASE + 0x011f, 0x00ff }, { USBTV_BASE + 0x0127, 0x0060 }, { USBTV_BASE + 0x00ae, 0x0030 }, { USBTV_BASE + 0x0239, 0x0060 }, }; switch (input) { case USBTV_COMPOSITE_INPUT: ret = usbtv_set_regs(usbtv, composite, ARRAY_SIZE(composite)); break; case USBTV_SVIDEO_INPUT: ret = usbtv_set_regs(usbtv, svideo, ARRAY_SIZE(svideo)); break; default: ret = -EINVAL; } if (!ret) usbtv->input = input; return ret; } static int usbtv_select_norm(struct usbtv *usbtv, v4l2_std_id norm) { int ret; static const u16 pal[][2] = { { USBTV_BASE + 0x001a, 0x0068 }, { USBTV_BASE + 0x010e, 0x0072 }, { USBTV_BASE + 0x010f, 0x00a2 }, { USBTV_BASE + 0x0112, 0x00b0 }, { USBTV_BASE + 0x0117, 0x0001 }, { USBTV_BASE + 0x0118, 0x002c }, { USBTV_BASE + 0x012d, 0x0010 }, { USBTV_BASE + 0x012f, 0x0020 }, { USBTV_BASE + 0x024f, 0x0002 }, { USBTV_BASE + 0x0254, 0x0059 }, { USBTV_BASE + 0x025a, 0x0016 }, { USBTV_BASE + 0x025b, 0x0035 }, { USBTV_BASE + 0x0263, 0x0017 }, { USBTV_BASE + 0x0266, 0x0016 }, { USBTV_BASE + 0x0267, 0x0036 } }; static const u16 ntsc[][2] = { { USBTV_BASE + 0x001a, 0x0079 }, { USBTV_BASE + 0x010e, 0x0068 }, { USBTV_BASE + 0x010f, 0x009c }, { USBTV_BASE + 0x0112, 0x00f0 }, { USBTV_BASE + 0x0117, 0x0000 }, { USBTV_BASE + 0x0118, 0x00fc }, { USBTV_BASE + 0x012d, 0x0004 }, { USBTV_BASE + 0x012f, 0x0008 }, { USBTV_BASE + 0x024f, 0x0001 }, { USBTV_BASE + 0x0254, 0x005f }, { USBTV_BASE + 0x025a, 0x0012 }, { USBTV_BASE + 0x025b, 0x0001 }, { USBTV_BASE + 0x0263, 0x001c }, { USBTV_BASE + 0x0266, 0x0011 }, { USBTV_BASE + 0x0267, 0x0005 } }; ret = usbtv_configure_for_norm(usbtv, norm); if (!ret) { if (norm & V4L2_STD_525_60) ret = usbtv_set_regs(usbtv, ntsc, ARRAY_SIZE(ntsc)); else if (norm & V4L2_STD_PAL) ret = usbtv_set_regs(usbtv, pal, ARRAY_SIZE(pal)); } return ret; } static int usbtv_setup_capture(struct usbtv *usbtv) { int ret; static const u16 setup[][2] = { /* These seem to enable the device. */ { USBTV_BASE + 0x0008, 0x0001 }, { USBTV_BASE + 0x01d0, 0x00ff }, { USBTV_BASE + 0x01d9, 0x0002 }, /* These seem to influence color parameters, such as * brightness, etc. */ { USBTV_BASE + 0x0239, 0x0040 }, { USBTV_BASE + 0x0240, 0x0000 }, { USBTV_BASE + 0x0241, 0x0000 }, { USBTV_BASE + 0x0242, 0x0002 }, { USBTV_BASE + 0x0243, 0x0080 }, { USBTV_BASE + 0x0244, 0x0012 }, { USBTV_BASE + 0x0245, 0x0090 }, { USBTV_BASE + 0x0246, 0x0000 }, { USBTV_BASE + 0x0278, 0x002d }, { USBTV_BASE + 0x0279, 0x000a }, { USBTV_BASE + 0x027a, 0x0032 }, { 0xf890, 0x000c }, { 0xf894, 0x0086 }, { USBTV_BASE + 0x00ac, 0x00c0 }, { USBTV_BASE + 0x00ad, 0x0000 }, { USBTV_BASE + 0x00a2, 0x0012 }, { USBTV_BASE + 0x00a3, 0x00e0 }, { USBTV_BASE + 0x00a4, 0x0028 }, { USBTV_BASE + 0x00a5, 0x0082 }, { USBTV_BASE + 0x00a7, 0x0080 }, { USBTV_BASE + 0x0000, 0x0014 }, { USBTV_BASE + 0x0006, 0x0003 }, { USBTV_BASE + 0x0090, 0x0099 }, { USBTV_BASE + 0x0091, 0x0090 }, { USBTV_BASE + 0x0094, 0x0068 }, { USBTV_BASE + 0x0095, 0x0070 }, { USBTV_BASE + 0x009c, 0x0030 }, { USBTV_BASE + 0x009d, 0x00c0 }, { USBTV_BASE + 0x009e, 0x00e0 }, { USBTV_BASE + 0x0019, 0x0006 }, { USBTV_BASE + 0x008c, 0x00ba }, { USBTV_BASE + 0x0101, 0x00ff }, { USBTV_BASE + 0x010c, 0x00b3 }, { USBTV_BASE + 0x01b2, 0x0080 }, { USBTV_BASE + 0x01b4, 0x00a0 }, { USBTV_BASE + 0x014c, 0x00ff }, { USBTV_BASE + 0x014d, 0x00ca }, { USBTV_BASE + 0x0113, 0x0053 }, { USBTV_BASE + 0x0119, 0x008a }, { USBTV_BASE + 0x013c, 0x0003 }, { USBTV_BASE + 0x0150, 0x009c }, { USBTV_BASE + 0x0151, 0x0071 }, { USBTV_BASE + 0x0152, 0x00c6 }, { USBTV_BASE + 0x0153, 0x0084 }, { USBTV_BASE + 0x0154, 0x00bc }, { USBTV_BASE + 0x0155, 0x00a0 }, { USBTV_BASE + 0x0156, 0x00a0 }, { USBTV_BASE + 0x0157, 0x009c }, { USBTV_BASE + 0x0158, 0x001f }, { USBTV_BASE + 0x0159, 0x0006 }, { USBTV_BASE + 0x015d, 0x0000 }, { USBTV_BASE + 0x0003, 0x0004 }, { USBTV_BASE + 0x0100, 0x00d3 }, { USBTV_BASE + 0x0115, 0x0015 }, { USBTV_BASE + 0x0220, 0x002e }, { USBTV_BASE + 0x0225, 0x0008 }, { USBTV_BASE + 0x024e, 0x0002 }, { USBTV_BASE + 0x024e, 0x0002 }, { USBTV_BASE + 0x024f, 0x0002 }, }; ret = usbtv_set_regs(usbtv, setup, ARRAY_SIZE(setup)); if (ret) return ret; ret = usbtv_select_norm(usbtv, usbtv->norm); if (ret) return ret; ret = usbtv_select_input(usbtv, usbtv->input); if (ret) return ret; ret = v4l2_ctrl_handler_setup(&usbtv->ctrl); if (ret) return ret; return 0; } /* Copy data from chunk into a frame buffer, deinterlacing the data * into every second line. Unfortunately, they don't align nicely into * 720 pixel lines, as the chunk is 240 words long, which is 480 pixels. * Therefore, we break down the chunk into two halves before copying, * so that we can interleave a line if needed. * * Each "chunk" is 240 words; a word in this context equals 4 bytes. * Image format is YUYV/YUV 4:2:2, consisting of Y Cr Y Cb, defining two * pixels, the Cr and Cb shared between the two pixels, but each having * separate Y values. Thus, the 240 words equal 480 pixels. It therefore, * takes 1.5 chunks to make a 720 pixel-wide line for the frame. * The image is interlaced, so there is a "scan" of odd lines, followed * by "scan" of even numbered lines. * * Following code is writing the chunks in correct sequence, skipping * the rows based on "odd" value. * line 1: chunk[0][ 0..479] chunk[0][480..959] chunk[1][ 0..479] * line 3: chunk[1][480..959] chunk[2][ 0..479] chunk[2][480..959] * ...etc. */ static void usbtv_chunk_to_vbuf(u32 *frame, __be32 *src, int chunk_no, int odd) { int half; for (half = 0; half < 2; half++) { int part_no = chunk_no * 2 + half; int line = part_no / 3; int part_index = (line * 2 + !odd) * 3 + (part_no % 3); u32 *dst = &frame[part_index * USBTV_CHUNK/2]; memcpy(dst, src, USBTV_CHUNK/2 * sizeof(*src)); src += USBTV_CHUNK/2; } } /* Called for each 256-byte image chunk. * First word identifies the chunk, followed by 240 words of image * data and padding. */ static void usbtv_image_chunk(struct usbtv *usbtv, __be32 *chunk) { int frame_id, odd, chunk_no; u32 *frame; struct usbtv_buf *buf; unsigned long flags; /* Ignore corrupted lines. */ if (!USBTV_MAGIC_OK(chunk)) return; frame_id = USBTV_FRAME_ID(chunk); odd = USBTV_ODD(chunk); chunk_no = USBTV_CHUNK_NO(chunk); if (chunk_no >= usbtv->n_chunks) return; /* Beginning of a frame. */ if (chunk_no == 0) { usbtv->frame_id = frame_id; usbtv->chunks_done = 0; } if (usbtv->frame_id != frame_id) return; spin_lock_irqsave(&usbtv->buflock, flags); if (list_empty(&usbtv->bufs)) { /* No free buffers. Userspace likely too slow. */ spin_unlock_irqrestore(&usbtv->buflock, flags); return; } /* First available buffer. */ buf = list_first_entry(&usbtv->bufs, struct usbtv_buf, list); frame = vb2_plane_vaddr(&buf->vb.vb2_buf, 0); /* Copy the chunk data. */ usbtv_chunk_to_vbuf(frame, &chunk[1], chunk_no, odd); usbtv->chunks_done++; /* Last chunk in a field */ if (chunk_no == usbtv->n_chunks-1) { /* Last chunk in a frame, signalling an end */ if (odd && !usbtv->last_odd) { int size = vb2_plane_size(&buf->vb.vb2_buf, 0); enum vb2_buffer_state state = usbtv->chunks_done == usbtv->n_chunks ? VB2_BUF_STATE_DONE : VB2_BUF_STATE_ERROR; buf->vb.field = V4L2_FIELD_INTERLACED; buf->vb.sequence = usbtv->sequence++; buf->vb.vb2_buf.timestamp = ktime_get_ns(); vb2_set_plane_payload(&buf->vb.vb2_buf, 0, size); vb2_buffer_done(&buf->vb.vb2_buf, state); list_del(&buf->list); } usbtv->last_odd = odd; } spin_unlock_irqrestore(&usbtv->buflock, flags); } /* Got image data. Each packet contains a number of 256-word chunks we * compose the image from. */ static void usbtv_iso_cb(struct urb *ip) { int ret; int i; struct usbtv *usbtv = (struct usbtv *)ip->context; switch (ip->status) { /* All fine. */ case 0: break; /* Device disconnected or capture stopped? */ case -ENODEV: case -ENOENT: case -ECONNRESET: case -ESHUTDOWN: return; /* Unknown error. Retry. */ default: dev_warn(usbtv->dev, "Bad response for ISO request.\n"); goto resubmit; } for (i = 0; i < ip->number_of_packets; i++) { int size = ip->iso_frame_desc[i].actual_length; unsigned char *data = ip->transfer_buffer + ip->iso_frame_desc[i].offset; int offset; for (offset = 0; USBTV_CHUNK_SIZE * offset < size; offset++) usbtv_image_chunk(usbtv, (__be32 *)&data[USBTV_CHUNK_SIZE * offset]); } resubmit: ret = usb_submit_urb(ip, GFP_ATOMIC); if (ret < 0) dev_warn(usbtv->dev, "Could not resubmit ISO URB\n"); } static struct urb *usbtv_setup_iso_transfer(struct usbtv *usbtv) { struct urb *ip; int size = usbtv->iso_size; int i; ip = usb_alloc_urb(USBTV_ISOC_PACKETS, GFP_KERNEL); if (ip == NULL) return NULL; ip->dev = usbtv->udev; ip->context = usbtv; ip->pipe = usb_rcvisocpipe(usbtv->udev, USBTV_VIDEO_ENDP); ip->interval = 1; ip->transfer_flags = URB_ISO_ASAP; ip->transfer_buffer = kzalloc(size * USBTV_ISOC_PACKETS, GFP_KERNEL); if (!ip->transfer_buffer) { usb_free_urb(ip); return NULL; } ip->complete = usbtv_iso_cb; ip->number_of_packets = USBTV_ISOC_PACKETS; ip->transfer_buffer_length = size * USBTV_ISOC_PACKETS; for (i = 0; i < USBTV_ISOC_PACKETS; i++) { ip->iso_frame_desc[i].offset = size * i; ip->iso_frame_desc[i].length = size; } return ip; } static void usbtv_stop(struct usbtv *usbtv) { int i; unsigned long flags; /* Cancel running transfers. */ for (i = 0; i < USBTV_ISOC_TRANSFERS; i++) { struct urb *ip = usbtv->isoc_urbs[i]; if (ip == NULL) continue; usb_kill_urb(ip); kfree(ip->transfer_buffer); usb_free_urb(ip); usbtv->isoc_urbs[i] = NULL; } /* Return buffers to userspace. */ spin_lock_irqsave(&usbtv->buflock, flags); while (!list_empty(&usbtv->bufs)) { struct usbtv_buf *buf = list_first_entry(&usbtv->bufs, struct usbtv_buf, list); vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR); list_del(&buf->list); } spin_unlock_irqrestore(&usbtv->buflock, flags); } static int usbtv_start(struct usbtv *usbtv) { int i; int ret; usbtv_audio_suspend(usbtv); ret = usb_set_interface(usbtv->udev, 0, 0); if (ret < 0) return ret; ret = usbtv_setup_capture(usbtv); if (ret < 0) return ret; ret = usb_set_interface(usbtv->udev, 0, 1); if (ret < 0) return ret; usbtv_audio_resume(usbtv); for (i = 0; i < USBTV_ISOC_TRANSFERS; i++) { struct urb *ip; ip = usbtv_setup_iso_transfer(usbtv); if (ip == NULL) { ret = -ENOMEM; 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; } 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) { struct usbtv *dev = video_drvdata(file); switch (i->index) { case USBTV_COMPOSITE_INPUT: strlcpy(i->name, "Composite", sizeof(i->name)); break; case USBTV_SVIDEO_INPUT: strlcpy(i->name, "S-Video", sizeof(i->name)); break; default: return -EINVAL; } i->type = V4L2_INPUT_TYPE_CAMERA; i->std = dev->vdev.tvnorms; 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) { struct usbtv *usbtv = video_drvdata(file); 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; return 0; } static int usbtv_g_std(struct file *file, void *priv, v4l2_std_id *norm) { struct usbtv *usbtv = video_drvdata(file); *norm = usbtv->norm; return 0; } static int usbtv_s_std(struct file *file, void *priv, v4l2_std_id norm) { int ret = -EINVAL; struct usbtv *usbtv = video_drvdata(file); if ((norm & V4L2_STD_525_60) || (norm & V4L2_STD_PAL)) ret = usbtv_select_norm(usbtv, norm); return ret; } static int usbtv_g_input(struct file *file, void *priv, unsigned int *i) { struct usbtv *usbtv = video_drvdata(file); *i = usbtv->input; return 0; } static int usbtv_s_input(struct file *file, void *priv, unsigned int i) { struct usbtv *usbtv = video_drvdata(file); return usbtv_select_input(usbtv, i); } static 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, }; static const 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, unsigned int *nbuffers, unsigned int *nplanes, unsigned int sizes[], struct device *alloc_devs[]) { struct usbtv *usbtv = vb2_get_drv_priv(vq); unsigned size = USBTV_CHUNK * usbtv->n_chunks * 2 * sizeof(u32); if (vq->num_buffers + *nbuffers < 2) *nbuffers = 2 - vq->num_buffers; if (*nplanes) return sizes[0] < size ? -EINVAL : 0; *nplanes = 1; sizes[0] = size; return 0; } static void usbtv_buf_queue(struct vb2_buffer *vb) { struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); struct usbtv *usbtv = vb2_get_drv_priv(vb->vb2_queue); struct usbtv_buf *buf = container_of(vbuf, 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; usbtv->last_odd = 1; usbtv->sequence = 0; return usbtv_start(usbtv); } static void usbtv_stop_streaming(struct vb2_queue *vq) { struct usbtv *usbtv = vb2_get_drv_priv(vq); if (usbtv->udev) usbtv_stop(usbtv); } static const 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 int usbtv_s_ctrl(struct v4l2_ctrl *ctrl) { struct usbtv *usbtv = container_of(ctrl->handler, struct usbtv, ctrl); u8 *data; u16 index, size; int ret; data = kmalloc(3, GFP_KERNEL); if (!data) return -ENOMEM; /* * Read in the current brightness/contrast registers. We need them * both, because the values are for some reason interleaved. */ if (ctrl->id == V4L2_CID_BRIGHTNESS || ctrl->id == V4L2_CID_CONTRAST) { ret = usb_control_msg(usbtv->udev, usb_rcvctrlpipe(usbtv->udev, 0), USBTV_CONTROL_REG, USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 0, USBTV_BASE + 0x0244, (void *)data, 3, USB_CTRL_GET_TIMEOUT); if (ret < 0) goto error; } switch (ctrl->id) { case V4L2_CID_BRIGHTNESS: index = USBTV_BASE + 0x0244; size = 3; data[0] &= 0xf0; data[0] |= (ctrl->val >> 8) & 0xf; data[2] = ctrl->val & 0xff; break; case V4L2_CID_CONTRAST: index = USBTV_BASE + 0x0244; size = 3; data[0] &= 0x0f; data[0] |= (ctrl->val >> 4) & 0xf0; data[1] = ctrl->val & 0xff; break; case V4L2_CID_SATURATION: index = USBTV_BASE + 0x0242; data[0] = ctrl->val >> 8; data[1] = ctrl->val & 0xff; size = 2; break; case V4L2_CID_HUE: index = USBTV_BASE + 0x0240; size = 2; if (ctrl->val > 0) { data[0] = 0x92 + (ctrl->val >> 8); data[1] = ctrl->val & 0xff; } else { data[0] = 0x82 + (-ctrl->val >> 8); data[1] = -ctrl->val & 0xff; } break; case V4L2_CID_SHARPNESS: index = USBTV_BASE + 0x0239; data[0] = 0; data[1] = ctrl->val; size = 2; break; default: kfree(data); return -EINVAL; } ret = usb_control_msg(usbtv->udev, usb_sndctrlpipe(usbtv->udev, 0), USBTV_CONTROL_REG, USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 0, index, (void *)data, size, USB_CTRL_SET_TIMEOUT); error: if (ret < 0) dev_warn(usbtv->dev, "Failed to submit a control request.\n"); kfree(data); return ret; } static const struct v4l2_ctrl_ops usbtv_ctrl_ops = { .s_ctrl = usbtv_s_ctrl, }; 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); v4l2_ctrl_handler_free(&usbtv->ctrl); vb2_queue_release(&usbtv->vb2q); kfree(usbtv); } int usbtv_video_init(struct usbtv *usbtv) { int ret; (void)usbtv_configure_for_norm(usbtv, V4L2_STD_525_60); 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_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; usbtv->vb2q.lock = &usbtv->vb2q_lock; ret = vb2_queue_init(&usbtv->vb2q); if (ret < 0) { dev_warn(usbtv->dev, "Could not initialize videobuf2 queue\n"); return ret; } /* controls */ v4l2_ctrl_handler_init(&usbtv->ctrl, 4); v4l2_ctrl_new_std(&usbtv->ctrl, &usbtv_ctrl_ops, V4L2_CID_CONTRAST, 0, 0x3ff, 1, 0x1d0); v4l2_ctrl_new_std(&usbtv->ctrl, &usbtv_ctrl_ops, V4L2_CID_BRIGHTNESS, 0, 0x3ff, 1, 0x1c0); v4l2_ctrl_new_std(&usbtv->ctrl, &usbtv_ctrl_ops, V4L2_CID_SATURATION, 0, 0x3ff, 1, 0x200); v4l2_ctrl_new_std(&usbtv->ctrl, &usbtv_ctrl_ops, V4L2_CID_HUE, -0xdff, 0xdff, 1, 0x000); v4l2_ctrl_new_std(&usbtv->ctrl, &usbtv_ctrl_ops, V4L2_CID_SHARPNESS, 0x0, 0xff, 1, 0x60); ret = usbtv->ctrl.error; if (ret < 0) { dev_warn(usbtv->dev, "Could not initialize controls\n"); goto ctrl_fail; } /* v4l2 structure */ usbtv->v4l2_dev.ctrl_handler = &usbtv->ctrl; usbtv->v4l2_dev.release = usbtv_release; ret = v4l2_device_register(usbtv->dev, &usbtv->v4l2_dev); if (ret < 0) { dev_warn(usbtv->dev, "Could not register v4l2 device\n"); goto v4l2_fail; } /* 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 = USBTV_TV_STD; usbtv->vdev.queue = &usbtv->vb2q; usbtv->vdev.lock = &usbtv->v4l2_lock; video_set_drvdata(&usbtv->vdev, usbtv); ret = video_register_device(&usbtv->vdev, VFL_TYPE_GRABBER, -1); if (ret < 0) { dev_warn(usbtv->dev, "Could not register video device\n"); goto vdev_fail; } return 0; vdev_fail: v4l2_device_unregister(&usbtv->v4l2_dev); v4l2_fail: ctrl_fail: v4l2_ctrl_handler_free(&usbtv->ctrl); vb2_queue_release(&usbtv->vb2q); return ret; } void usbtv_video_free(struct usbtv *usbtv) { mutex_lock(&usbtv->vb2q_lock); mutex_lock(&usbtv->v4l2_lock); usbtv_stop(usbtv); video_unregister_device(&usbtv->vdev); v4l2_device_disconnect(&usbtv->v4l2_dev); mutex_unlock(&usbtv->v4l2_lock); mutex_unlock(&usbtv->vb2q_lock); v4l2_device_put(&usbtv->v4l2_dev); }