+usbtv-y := usbtv-core.o \
+ usbtv-video.o
+
obj-$(CONFIG_VIDEO_USBTV) += usbtv.o
--- /dev/null
+/*
+ * Fushicai USBTV007 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.
+ *
+ * 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").
+ */
+
+#include <linux/module.h>
+
+#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;
+}
+
+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;
+
+ usb_set_intfdata(intf, usbtv);
+
+ ret = usbtv_video_init(usbtv);
+ if (ret < 0)
+ goto usbtv_video_fail;
+
+ /* for simplicity we exploit the v4l2_device reference counting */
+ v4l2_device_get(&usbtv->v4l2_dev);
+
+ dev_info(dev, "Fushicai USBTV007 Video Grabber\n");
+ return 0;
+
+usbtv_video_fail:
+ kfree(usbtv);
+
+ return ret;
+}
+
+static void usbtv_disconnect(struct usb_interface *intf)
+{
+ struct usbtv *usbtv = usb_get_intfdata(intf);
+ usb_set_intfdata(intf, NULL);
+
+ if (!usbtv)
+ return;
+
+ 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);
+}
+
+struct usb_device_id usbtv_id_table[] = {
+ { USB_DEVICE(0x1b71, 0x3002) },
+ {}
+};
+MODULE_DEVICE_TABLE(usb, usbtv_id_table);
+
+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);
--- /dev/null
+/*
+ * Fushicai USBTV007 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.
+ *
+ * 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").
+ */
+
+#include <media/v4l2-ioctl.h>
+#include <media/videobuf2-core.h>
+
+#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 + 0x0284, 0x00aa },
+ { 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 + 0x0284, 0x0088 },
+ { 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 + 0x0284, 0x0088 },
+ { 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;
+
+ 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 copyting,
+ * so that we can interleave a line if needed. */
+static void usbtv_chunk_to_vbuf(u32 *frame, u32 *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, u32 *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, 0);
+
+ /* Copy the chunk data. */
+ usbtv_chunk_to_vbuf(frame, &chunk[1], chunk_no, odd);
+ usbtv->chunks_done++;
+
+ /* Last chunk in a frame, signalling an end */
+ if (odd && chunk_no == usbtv->n_chunks-1) {
+ int size = vb2_plane_size(&buf->vb, 0);
+ enum vb2_buffer_state state = usbtv->chunks_done ==
+ usbtv->n_chunks ?
+ VB2_BUF_STATE_DONE :
+ VB2_BUF_STATE_ERROR;
+
+ buf->vb.v4l2_buf.field = V4L2_FIELD_INTERLACED;
+ buf->vb.v4l2_buf.sequence = usbtv->sequence++;
+ v4l2_get_timestamp(&buf->vb.v4l2_buf.timestamp);
+ vb2_set_plane_payload(&buf->vb, 0, size);
+ vb2_buffer_done(&buf->vb, state);
+ list_del(&buf->list);
+ }
+
+ 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,
+ (u32 *)&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);
+ 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_STATE_ERROR);
+ list_del(&buf->list);
+ }
+ spin_unlock_irqrestore(&usbtv->buflock, flags);
+}
+
+static int usbtv_start(struct usbtv *usbtv)
+{
+ int i;
+ int ret;
+
+ 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;
+
+ 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);
+}
+
+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[])
+{
+ struct usbtv *usbtv = vb2_get_drv_priv(vq);
+
+ if (*nbuffers < 2)
+ *nbuffers = 2;
+ *nplanes = 1;
+ sizes[0] = USBTV_CHUNK * usbtv->n_chunks * 2 * 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);
+}
+
+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_type = 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;
+ }
+
+ /* v4l2 structure */
+ 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;
+ 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(usbtv->dev, "Could not register video device\n");
+ goto vdev_fail;
+ }
+
+ return 0;
+
+vdev_fail:
+ v4l2_device_unregister(&usbtv->v4l2_dev);
+v4l2_fail:
+ 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);
+}
+++ /dev/null
-/*
- * Fushicai USBTV007 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.
- *
- * 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").
- */
-
-#include <linux/init.h>
-#include <linux/list.h>
-#include <linux/module.h>
-#include <linux/slab.h>
-#include <linux/usb.h>
-#include <linux/videodev2.h>
-
-#include <media/v4l2-device.h>
-#include <media/v4l2-ioctl.h>
-#include <media/videobuf2-core.h>
-#include <media/videobuf2-vmalloc.h>
-
-/* Hardware. */
-#define USBTV_VIDEO_ENDP 0x81
-#define USBTV_BASE 0xc000
-#define USBTV_REQUEST_REG 12
-
-/* Number of concurrent isochronous urbs submitted.
- * Higher numbers was seen to overly saturate the USB bus. */
-#define USBTV_ISOC_TRANSFERS 16
-#define USBTV_ISOC_PACKETS 8
-
-#define USBTV_CHUNK_SIZE 256
-#define USBTV_CHUNK 240
-
-/* Chunk header. */
-#define USBTV_MAGIC_OK(chunk) ((be32_to_cpu(chunk[0]) & 0xff000000) \
- == 0x88000000)
-#define USBTV_FRAME_ID(chunk) ((be32_to_cpu(chunk[0]) & 0x00ff0000) >> 16)
-#define USBTV_ODD(chunk) ((be32_to_cpu(chunk[0]) & 0x0000f000) >> 15)
-#define USBTV_CHUNK_NO(chunk) (be32_to_cpu(chunk[0]) & 0x00000fff)
-
-#define USBTV_TV_STD (V4L2_STD_525_60 | V4L2_STD_PAL)
-
-/* parameters for supported TV norms */
-struct usbtv_norm_params {
- v4l2_std_id norm;
- int cap_width, cap_height;
-};
-
-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,
- }
-};
-
-/* 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;
- 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];
-};
-
-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_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;
-}
-
-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 + 0x0284, 0x00aa },
- { 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 + 0x0284, 0x0088 },
- { 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 + 0x0284, 0x0088 },
- { 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;
-
- 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 copyting,
- * so that we can interleave a line if needed. */
-static void usbtv_chunk_to_vbuf(u32 *frame, u32 *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, u32 *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, 0);
-
- /* Copy the chunk data. */
- usbtv_chunk_to_vbuf(frame, &chunk[1], chunk_no, odd);
- usbtv->chunks_done++;
-
- /* Last chunk in a frame, signalling an end */
- if (odd && chunk_no == usbtv->n_chunks-1) {
- int size = vb2_plane_size(&buf->vb, 0);
- enum vb2_buffer_state state = usbtv->chunks_done ==
- usbtv->n_chunks ?
- VB2_BUF_STATE_DONE :
- VB2_BUF_STATE_ERROR;
-
- buf->vb.v4l2_buf.field = V4L2_FIELD_INTERLACED;
- buf->vb.v4l2_buf.sequence = usbtv->sequence++;
- v4l2_get_timestamp(&buf->vb.v4l2_buf.timestamp);
- vb2_set_plane_payload(&buf->vb, 0, size);
- vb2_buffer_done(&buf->vb, state);
- list_del(&buf->list);
- }
-
- 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,
- (u32 *)&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);
- 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_STATE_ERROR);
- list_del(&buf->list);
- }
- spin_unlock_irqrestore(&usbtv->buflock, flags);
-}
-
-static int usbtv_start(struct usbtv *usbtv)
-{
- int i;
- int ret;
-
- 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;
-
- 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;
-}
-
-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)
-{
- 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);
-}
-
-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[])
-{
- struct usbtv *usbtv = vb2_get_drv_priv(vq);
-
- if (*nbuffers < 2)
- *nbuffers = 2;
- *nplanes = 1;
- sizes[0] = USBTV_CHUNK * usbtv->n_chunks * 2 * 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;
-
- (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_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 = USBTV_TV_STD;
- 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);
--- /dev/null
+/*
+ * Fushicai USBTV007 Video Grabber Driver
+ *
+ * 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").
+ */
+
+#include <linux/slab.h>
+#include <linux/usb.h>
+
+#include <media/v4l2-device.h>
+#include <media/videobuf2-vmalloc.h>
+
+/* Hardware. */
+#define USBTV_VIDEO_ENDP 0x81
+#define USBTV_BASE 0xc000
+#define USBTV_REQUEST_REG 12
+
+/* Number of concurrent isochronous urbs submitted.
+ * Higher numbers was seen to overly saturate the USB bus. */
+#define USBTV_ISOC_TRANSFERS 16
+#define USBTV_ISOC_PACKETS 8
+
+#define USBTV_CHUNK_SIZE 256
+#define USBTV_CHUNK 240
+
+/* Chunk header. */
+#define USBTV_MAGIC_OK(chunk) ((be32_to_cpu(chunk[0]) & 0xff000000) \
+ == 0x88000000)
+#define USBTV_FRAME_ID(chunk) ((be32_to_cpu(chunk[0]) & 0x00ff0000) >> 16)
+#define USBTV_ODD(chunk) ((be32_to_cpu(chunk[0]) & 0x0000f000) >> 15)
+#define USBTV_CHUNK_NO(chunk) (be32_to_cpu(chunk[0]) & 0x00000fff)
+
+#define USBTV_TV_STD (V4L2_STD_525_60 | V4L2_STD_PAL)
+
+/* parameters for supported TV norms */
+struct usbtv_norm_params {
+ v4l2_std_id norm;
+ int cap_width, cap_height;
+};
+
+/* 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);
projects / GitHub / LineageOS / android_kernel_motorola_exynos9610.git / commitdiff