// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Auvitek AU0828 USB Bridge (Analog video support)
 *
 * Copyright (C) 2009 Devin Heitmueller <dheitmueller@linuxtv.org>
 * Copyright (C) 2005-2008 Auvitek International, Ltd.
 */

/* Developer Notes:
 *
 * The hardware scaler supported is unimplemented
 * AC97 audio support is unimplemented (only i2s audio mode)
 *
 */

#include "au0828.h"
#include "au8522.h"

#include <linux/module.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/device.h>
#include <media/v4l2-common.h>
#include <media/v4l2-mc.h>
#include <media/v4l2-ioctl.h>
#include <media/v4l2-event.h>
#include <media/tuner.h>
#include "au0828-reg.h"

static DEFINE_MUTEX(au0828_sysfs_lock);

/* ------------------------------------------------------------------
        Videobuf operations
   ------------------------------------------------------------------*/

static unsigned int isoc_debug;
module_param(isoc_debug, int, 0644);
MODULE_PARM_DESC(isoc_debug, "enable debug messages [isoc transfers]");

#define au0828_isocdbg(fmt, arg...) \
do {\
        if (isoc_debug) { \
                pr_info("au0828 %s :"fmt, \
                       __func__ , ##arg);          \
        } \
  } while (0)

static inline void i2c_gate_ctrl(struct au0828_dev *dev, int val)
{
        if (dev->dvb.frontend && dev->dvb.frontend->ops.analog_ops.i2c_gate_ctrl)
                dev->dvb.frontend->ops.analog_ops.i2c_gate_ctrl(dev->dvb.frontend, val);
}

static inline void print_err_status(struct au0828_dev *dev,
                                    int packet, int status)
{
        char *errmsg = "Unknown";

        switch (status) {
        case -ENOENT:
                errmsg = "unlinked synchronously";
                break;
        case -ECONNRESET:
                errmsg = "unlinked asynchronously";
                break;
        case -ENOSR:
                errmsg = "Buffer error (overrun)";
                break;
        case -EPIPE:
                errmsg = "Stalled (device not responding)";
                break;
        case -EOVERFLOW:
                errmsg = "Babble (bad cable?)";
                break;
        case -EPROTO:
                errmsg = "Bit-stuff error (bad cable?)";
                break;
        case -EILSEQ:
                errmsg = "CRC/Timeout (could be anything)";
                break;
        case -ETIME:
                errmsg = "Device does not respond";
                break;
        }
        if (packet < 0) {
                au0828_isocdbg("URB status %d [%s].\n", status, errmsg);
        } else {
                au0828_isocdbg("URB packet %d, status %d [%s].\n",
                               packet, status, errmsg);
        }
}

static int check_dev(struct au0828_dev *dev)
{
        if (test_bit(DEV_DISCONNECTED, &dev->dev_state)) {
                pr_info("v4l2 ioctl: device not present\n");
                return -ENODEV;
        }

        if (test_bit(DEV_MISCONFIGURED, &dev->dev_state)) {
                pr_info("v4l2 ioctl: device is misconfigured; close and open it again\n");
                return -EIO;
        }
        return 0;
}

/*
 * IRQ callback, called by URB callback
 */
static void au0828_irq_callback(struct urb *urb)
{
        struct au0828_dmaqueue  *dma_q = urb->context;
        struct au0828_dev *dev = container_of(dma_q, struct au0828_dev, vidq);
        unsigned long flags = 0;
        int i;

        switch (urb->status) {
        case 0:             /* success */
        case -ETIMEDOUT:    /* NAK */
                break;
        case -ECONNRESET:   /* kill */
        case -ENOENT:
        case -ESHUTDOWN:
                au0828_isocdbg("au0828_irq_callback called: status kill\n");
                return;
        default:            /* unknown error */
                au0828_isocdbg("urb completion error %d.\n", urb->status);
                break;
        }

        /* Copy data from URB */
        spin_lock_irqsave(&dev->slock, flags);
        dev->isoc_ctl.isoc_copy(dev, urb);
        spin_unlock_irqrestore(&dev->slock, flags);

        /* Reset urb buffers */
        for (i = 0; i < urb->number_of_packets; i++) {
                urb->iso_frame_desc[i].status = 0;
                urb->iso_frame_desc[i].actual_length = 0;
        }
        urb->status = 0;

        urb->status = usb_submit_urb(urb, GFP_ATOMIC);
        if (urb->status) {
                au0828_isocdbg("urb resubmit failed (error=%i)\n",
                               urb->status);
        }
        dev->stream_state = STREAM_ON;
}

/*
 * Stop and Deallocate URBs
 */
static void au0828_uninit_isoc(struct au0828_dev *dev)
{
        struct urb *urb;
        int i;

        au0828_isocdbg("au0828: called au0828_uninit_isoc\n");

        dev->isoc_ctl.nfields = -1;
        for (i = 0; i < dev->isoc_ctl.num_bufs; i++) {
                urb = dev->isoc_ctl.urb[i];
                if (urb) {
                        if (!irqs_disabled())
                                usb_kill_urb(urb);
                        else
                                usb_unlink_urb(urb);

                        if (dev->isoc_ctl.transfer_buffer[i]) {
                                usb_free_coherent(dev->usbdev,
                                        urb->transfer_buffer_length,
                                        dev->isoc_ctl.transfer_buffer[i],
                                        urb->transfer_dma);
                        }
                        usb_free_urb(urb);
                        dev->isoc_ctl.urb[i] = NULL;
                }
                dev->isoc_ctl.transfer_buffer[i] = NULL;
        }

        kfree(dev->isoc_ctl.urb);
        kfree(dev->isoc_ctl.transfer_buffer);

        dev->isoc_ctl.urb = NULL;
        dev->isoc_ctl.transfer_buffer = NULL;
        dev->isoc_ctl.num_bufs = 0;

        dev->stream_state = STREAM_OFF;
}

/*
 * Allocate URBs and start IRQ
 */
static int au0828_init_isoc(struct au0828_dev *dev, int max_packets,
                            int num_bufs, int max_pkt_size,
                            int (*isoc_copy) (struct au0828_dev *dev, struct urb *urb))
{
        struct au0828_dmaqueue *dma_q = &dev->vidq;
        int i;
        int sb_size, pipe;
        struct urb *urb;
        int j, k;
        int rc;

        au0828_isocdbg("au0828: called au0828_prepare_isoc\n");

        dev->isoc_ctl.isoc_copy = isoc_copy;
        dev->isoc_ctl.num_bufs = num_bufs;

        dev->isoc_ctl.urb = kcalloc(num_bufs, sizeof(void *),  GFP_KERNEL);
        if (!dev->isoc_ctl.urb) {
                au0828_isocdbg("cannot alloc memory for usb buffers\n");
                return -ENOMEM;
        }

        dev->isoc_ctl.transfer_buffer = kcalloc(num_bufs, sizeof(void *),
                                                GFP_KERNEL);
        if (!dev->isoc_ctl.transfer_buffer) {
                au0828_isocdbg("cannot allocate memory for usb transfer\n");
                kfree(dev->isoc_ctl.urb);
                return -ENOMEM;
        }

        dev->isoc_ctl.max_pkt_size = max_pkt_size;
        dev->isoc_ctl.buf = NULL;

        sb_size = max_packets * dev->isoc_ctl.max_pkt_size;

        /* allocate urbs and transfer buffers */
        for (i = 0; i < dev->isoc_ctl.num_bufs; i++) {
                urb = usb_alloc_urb(max_packets, GFP_KERNEL);
                if (!urb) {
                        au0828_isocdbg("cannot allocate URB\n");
                        au0828_uninit_isoc(dev);
                        return -ENOMEM;
                }
                dev->isoc_ctl.urb[i] = urb;

                dev->isoc_ctl.transfer_buffer[i] = usb_alloc_coherent(dev->usbdev,
                        sb_size, GFP_KERNEL, &urb->transfer_dma);
                if (!dev->isoc_ctl.transfer_buffer[i]) {
                        au0828_isocdbg("cannot allocate transfer buffer\n");
                        au0828_uninit_isoc(dev);
                        return -ENOMEM;
                }
                memset(dev->isoc_ctl.transfer_buffer[i], 0, sb_size);

                pipe = usb_rcvisocpipe(dev->usbdev,
                                       dev->isoc_in_endpointaddr);

                usb_fill_int_urb(urb, dev->usbdev, pipe,
                                 dev->isoc_ctl.transfer_buffer[i], sb_size,
                                 au0828_irq_callback, dma_q, 1);

                urb->number_of_packets = max_packets;
                urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP;

                k = 0;
                for (j = 0; j < max_packets; j++) {
                        urb->iso_frame_desc[j].offset = k;
                        urb->iso_frame_desc[j].length =
                                                dev->isoc_ctl.max_pkt_size;
                        k += dev->isoc_ctl.max_pkt_size;
                }
        }

        /* submit urbs and enables IRQ */
        for (i = 0; i < dev->isoc_ctl.num_bufs; i++) {
                rc = usb_submit_urb(dev->isoc_ctl.urb[i], GFP_ATOMIC);
                if (rc) {
                        au0828_isocdbg("submit of urb %i failed (error=%i)\n",
                                       i, rc);
                        au0828_uninit_isoc(dev);
                        return rc;
                }
        }

        return 0;
}

/*
 * Announces that a buffer were filled and request the next
 */
static inline void buffer_filled(struct au0828_dev *dev,
                                 struct au0828_dmaqueue *dma_q,
                                 struct au0828_buffer *buf)
{
        struct vb2_v4l2_buffer *vb = &buf->vb;
        struct vb2_queue *q = vb->vb2_buf.vb2_queue;

        /* Advice that buffer was filled */
        au0828_isocdbg("[%p/%d] wakeup\n", buf, buf->top_field);

        if (q->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
                vb->sequence = dev->frame_count++;
        else
                vb->sequence = dev->vbi_frame_count++;

        vb->field = V4L2_FIELD_INTERLACED;
        vb->vb2_buf.timestamp = ktime_get_ns();
        vb2_buffer_done(&vb->vb2_buf, VB2_BUF_STATE_DONE);
}

/*
 * Identify the buffer header type and properly handles
 */
static void au0828_copy_video(struct au0828_dev *dev,
                              struct au0828_dmaqueue  *dma_q,
                              struct au0828_buffer *buf,
                              unsigned char *p,
                              unsigned char *outp, unsigned long len)
{
        void *fieldstart, *startwrite, *startread;
        int  linesdone, currlinedone, offset, lencopy, remain;
        int bytesperline = dev->width << 1; /* Assumes 16-bit depth @@@@ */

        if (len == 0)
                return;

        if (dma_q->pos + len > buf->length)
                len = buf->length - dma_q->pos;

        startread = p;
        remain = len;

        /* Interlaces frame */
        if (buf->top_field)
                fieldstart = outp;
        else
                fieldstart = outp + bytesperline;

        linesdone = dma_q->pos / bytesperline;
        currlinedone = dma_q->pos % bytesperline;
        offset = linesdone * bytesperline * 2 + currlinedone;
        startwrite = fieldstart + offset;
        lencopy = bytesperline - currlinedone;
        lencopy = lencopy > remain ? remain : lencopy;

        if ((char *)startwrite + lencopy > (char *)outp + buf->length) {
                au0828_isocdbg("Overflow of %zi bytes past buffer end (1)\n",
                               ((char *)startwrite + lencopy) -
                               ((char *)outp + buf->length));
                remain = (char *)outp + buf->length - (char *)startwrite;
                lencopy = remain;
        }
        if (lencopy <= 0)
                return;
        memcpy(startwrite, startread, lencopy);

        remain -= lencopy;

        while (remain > 0) {
                startwrite += lencopy + bytesperline;
                startread += lencopy;
                if (bytesperline > remain)
                        lencopy = remain;
                else
                        lencopy = bytesperline;

                if ((char *)startwrite + lencopy > (char *)outp +
                    buf->length) {
                        au0828_isocdbg("Overflow %zi bytes past buf end (2)\n",
                                       ((char *)startwrite + lencopy) -
                                       ((char *)outp + buf->length));
                        lencopy = remain = (char *)outp + buf->length -
                                           (char *)startwrite;
                }
                if (lencopy <= 0)
                        break;

                memcpy(startwrite, startread, lencopy);

                remain -= lencopy;
        }

        if (offset > 1440) {
                /* We have enough data to check for greenscreen */
                if (outp[0] < 0x60 && outp[1440] < 0x60)
                        dev->greenscreen_detected = 1;
        }

        dma_q->pos += len;
}

/*
 * generic routine to get the next available buffer
 */
static inline void get_next_buf(struct au0828_dmaqueue *dma_q,
                                struct au0828_buffer **buf)
{
        struct au0828_dev *dev = container_of(dma_q, struct au0828_dev, vidq);

        if (list_empty(&dma_q->active)) {
                au0828_isocdbg("No active queue to serve\n");
                dev->isoc_ctl.buf = NULL;
                *buf = NULL;
                return;
        }

        /* Get the next buffer */
        *buf = list_entry(dma_q->active.next, struct au0828_buffer, list);
        /* Cleans up buffer - Useful for testing for frame/URB loss */
        list_del(&(*buf)->list);
        dma_q->pos = 0;
        (*buf)->vb_buf = (*buf)->mem;
        dev->isoc_ctl.buf = *buf;

        return;
}

static void au0828_copy_vbi(struct au0828_dev *dev,
                              struct au0828_dmaqueue  *dma_q,
                              struct au0828_buffer *buf,
                              unsigned char *p,
                              unsigned char *outp, unsigned long len)
{
        unsigned char *startwrite, *startread;
        int bytesperline;
        int i, j = 0;

        if (dev == NULL) {
                au0828_isocdbg("dev is null\n");
                return;
        }

        if (dma_q == NULL) {
                au0828_isocdbg("dma_q is null\n");
                return;
        }
        if (buf == NULL)
                return;
        if (p == NULL) {
                au0828_isocdbg("p is null\n");
                return;
        }
        if (outp == NULL) {
                au0828_isocdbg("outp is null\n");
                return;
        }

        bytesperline = dev->vbi_width;

        if (dma_q->pos + len > buf->length)
                len = buf->length - dma_q->pos;

        startread = p;
        startwrite = outp + (dma_q->pos / 2);

        /* Make sure the bottom field populates the second half of the frame */
        if (buf->top_field == 0)
                startwrite += bytesperline * dev->vbi_height;

        for (i = 0; i < len; i += 2)
                startwrite[j++] = startread[i+1];

        dma_q->pos += len;
}


/*
 * generic routine to get the next available VBI buffer
 */
static inline void vbi_get_next_buf(struct au0828_dmaqueue *dma_q,
                                    struct au0828_buffer **buf)
{
        struct au0828_dev *dev = container_of(dma_q, struct au0828_dev, vbiq);

        if (list_empty(&dma_q->active)) {
                au0828_isocdbg("No active queue to serve\n");
                dev->isoc_ctl.vbi_buf = NULL;
                *buf = NULL;
                return;
        }

        /* Get the next buffer */
        *buf = list_entry(dma_q->active.next, struct au0828_buffer, list);
        /* Cleans up buffer - Useful for testing for frame/URB loss */
        list_del(&(*buf)->list);
        dma_q->pos = 0;
        (*buf)->vb_buf = (*buf)->mem;
        dev->isoc_ctl.vbi_buf = *buf;
        return;
}

/*
 * Controls the isoc copy of each urb packet
 */
static inline int au0828_isoc_copy(struct au0828_dev *dev, struct urb *urb)
{
        struct au0828_buffer    *buf;
        struct au0828_buffer    *vbi_buf;
        struct au0828_dmaqueue  *dma_q = urb->context;
        struct au0828_dmaqueue  *vbi_dma_q = &dev->vbiq;
        unsigned char *outp = NULL;
        unsigned char *vbioutp = NULL;
        int i, len = 0, rc = 1;
        unsigned char *p;
        unsigned char fbyte;
        unsigned int vbi_field_size;
        unsigned int remain, lencopy;

        if (!dev)
                return 0;

        if (test_bit(DEV_DISCONNECTED, &dev->dev_state) ||
            test_bit(DEV_MISCONFIGURED, &dev->dev_state))
                return 0;

        if (urb->status < 0) {
                print_err_status(dev, -1, urb->status);
                if (urb->status == -ENOENT)
                        return 0;
        }

        buf = dev->isoc_ctl.buf;
        if (buf != NULL)
                outp = vb2_plane_vaddr(&buf->vb.vb2_buf, 0);

        vbi_buf = dev->isoc_ctl.vbi_buf;
        if (vbi_buf != NULL)
                vbioutp = vb2_plane_vaddr(&vbi_buf->vb.vb2_buf, 0);

        for (i = 0; i < urb->number_of_packets; i++) {
                int status = urb->iso_frame_desc[i].status;

                if (status < 0) {
                        print_err_status(dev, i, status);
                        if (urb->iso_frame_desc[i].status != -EPROTO)
                                continue;
                }

                if (urb->iso_frame_desc[i].actual_length <= 0)
                        continue;

                if (urb->iso_frame_desc[i].actual_length >
                                                dev->max_pkt_size) {
                        au0828_isocdbg("packet bigger than packet size");
                        continue;
                }

                p = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
                fbyte = p[0];
                len = urb->iso_frame_desc[i].actual_length - 4;
                p += 4;

                if (fbyte & 0x80) {
                        len -= 4;
                        p += 4;
                        au0828_isocdbg("Video frame %s\n",
                                       (fbyte & 0x40) ? "odd" : "even");
                        if (fbyte & 0x40) {
                                /* VBI */
                                if (vbi_buf != NULL)
                                        buffer_filled(dev, vbi_dma_q, vbi_buf);
                                vbi_get_next_buf(vbi_dma_q, &vbi_buf);
                                if (vbi_buf == NULL)
                                        vbioutp = NULL;
                                else
                                        vbioutp = vb2_plane_vaddr(
                                                &vbi_buf->vb.vb2_buf, 0);

                                /* Video */
                                if (buf != NULL)
                                        buffer_filled(dev, dma_q, buf);
                                get_next_buf(dma_q, &buf);
                                if (buf == NULL)
                                        outp = NULL;
                                else
                                        outp = vb2_plane_vaddr(
                                                &buf->vb.vb2_buf, 0);

                                /* As long as isoc traffic is arriving, keep
                                   resetting the timer */
                                if (dev->vid_timeout_running)
                                        mod_timer(&dev->vid_timeout,
                                                  jiffies + (HZ / 10));
                                if (dev->vbi_timeout_running)
                                        mod_timer(&dev->vbi_timeout,
                                                  jiffies + (HZ / 10));
                        }

                        if (buf != NULL) {
                                if (fbyte & 0x40)
                                        buf->top_field = 1;
                                else
                                        buf->top_field = 0;
                        }

                        if (vbi_buf != NULL) {
                                if (fbyte & 0x40)
                                        vbi_buf->top_field = 1;
                                else
                                        vbi_buf->top_field = 0;
                        }

                        dev->vbi_read = 0;
                        vbi_dma_q->pos = 0;
                        dma_q->pos = 0;
                }

                vbi_field_size = dev->vbi_width * dev->vbi_height * 2;
                if (dev->vbi_read < vbi_field_size) {
                        remain  = vbi_field_size - dev->vbi_read;
                        lencopy = umin(len, remain);

                        if (vbi_buf != NULL)
                                au0828_copy_vbi(dev, vbi_dma_q, vbi_buf, p,
                                                vbioutp, len);

                        len -= lencopy;
                        p += lencopy;
                        dev->vbi_read += lencopy;
                }

                if (dev->vbi_read >= vbi_field_size && buf != NULL)
                        au0828_copy_video(dev, dma_q, buf, p, outp, len);
        }
        return rc;
}

void au0828_usb_v4l2_media_release(struct au0828_dev *dev)
{
#ifdef CONFIG_MEDIA_CONTROLLER
        int i;

        for (i = 0; i < AU0828_MAX_INPUT; i++) {
                if (AUVI_INPUT(i).type == AU0828_VMUX_UNDEFINED)
                        return;
                media_device_unregister_entity(&dev->input_ent[i]);
        }
#endif
}

static void au0828_usb_v4l2_release(struct v4l2_device *v4l2_dev)
{
        struct au0828_dev *dev =
                container_of(v4l2_dev, struct au0828_dev, v4l2_dev);

        v4l2_ctrl_handler_free(&dev->v4l2_ctrl_hdl);
        v4l2_device_unregister(&dev->v4l2_dev);
        au0828_usb_v4l2_media_release(dev);
        au0828_usb_release(dev);
}

int au0828_v4l2_device_register(struct usb_interface *interface,
                                struct au0828_dev *dev)
{
        int retval;

        if (AUVI_INPUT(0).type == AU0828_VMUX_UNDEFINED)
                return 0;

        /* Create the v4l2_device */
#ifdef CONFIG_MEDIA_CONTROLLER
        dev->v4l2_dev.mdev = dev->media_dev;
#endif
        retval = v4l2_device_register(&interface->dev, &dev->v4l2_dev);
        if (retval) {
                pr_err("%s() v4l2_device_register failed\n",
                       __func__);
                return retval;
        }

        dev->v4l2_dev.release = au0828_usb_v4l2_release;

        /* This control handler will inherit the controls from au8522 */
        retval = v4l2_ctrl_handler_init(&dev->v4l2_ctrl_hdl, 4);
        if (retval) {
                pr_err("%s() v4l2_ctrl_handler_init failed\n",
                       __func__);
                return retval;
        }
        dev->v4l2_dev.ctrl_handler = &dev->v4l2_ctrl_hdl;

        return 0;
}

static int queue_setup(struct vb2_queue *vq,
                       unsigned int *nbuffers, unsigned int *nplanes,
                       unsigned int sizes[], struct device *alloc_devs[])
{
        struct au0828_dev *dev = vb2_get_drv_priv(vq);
        unsigned long size = dev->height * dev->bytesperline;

        if (*nplanes)
                return sizes[0] < size ? -EINVAL : 0;
        *nplanes = 1;
        sizes[0] = size;
        return 0;
}

static int
buffer_prepare(struct vb2_buffer *vb)
{
        struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
        struct au0828_buffer *buf = container_of(vbuf,
                                struct au0828_buffer, vb);
        struct au0828_dev    *dev = vb2_get_drv_priv(vb->vb2_queue);

        buf->length = dev->height * dev->bytesperline;

        if (vb2_plane_size(vb, 0) < buf->length) {
                pr_err("%s data will not fit into plane (%lu < %lu)\n",
                        __func__, vb2_plane_size(vb, 0), buf->length);
                return -EINVAL;
        }
        vb2_set_plane_payload(&buf->vb.vb2_buf, 0, buf->length);
        return 0;
}

static void
buffer_queue(struct vb2_buffer *vb)
{
        struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
        struct au0828_buffer    *buf     = container_of(vbuf,
                                                        struct au0828_buffer,
                                                        vb);
        struct au0828_dev       *dev     = vb2_get_drv_priv(vb->vb2_queue);
        struct au0828_dmaqueue  *vidq    = &dev->vidq;
        unsigned long flags = 0;

        buf->mem = vb2_plane_vaddr(vb, 0);
        buf->length = vb2_plane_size(vb, 0);

        spin_lock_irqsave(&dev->slock, flags);
        list_add_tail(&buf->list, &vidq->active);
        spin_unlock_irqrestore(&dev->slock, flags);
}

static int au0828_i2s_init(struct au0828_dev *dev)
{
        /* Enable i2s mode */
        au0828_writereg(dev, AU0828_AUDIOCTRL_50C, 0x01);
        return 0;
}

/*
 * Auvitek au0828 analog stream enable
 */
static int au0828_analog_stream_enable(struct au0828_dev *d)
{
        struct usb_interface *iface;
        int ret, h, w;

        dprintk(1, "au0828_analog_stream_enable called\n");

        if (test_bit(DEV_DISCONNECTED, &d->dev_state))
                return -ENODEV;

        iface = usb_ifnum_to_if(d->usbdev, 0);
        if (iface && iface->cur_altsetting->desc.bAlternateSetting != 5) {
                dprintk(1, "Changing intf#0 to alt 5\n");
                /* set au0828 interface0 to AS5 here again */
                ret = usb_set_interface(d->usbdev, 0, 5);
                if (ret < 0) {
                        pr_info("Au0828 can't set alt setting to 5!\n");
                        return -EBUSY;
                }
        }

        h = d->height / 2 + 2;
        w = d->width * 2;

        au0828_writereg(d, AU0828_SENSORCTRL_VBI_103, 0x00);
        au0828_writereg(d, 0x106, 0x00);
        /* set x position */
        au0828_writereg(d, 0x110, 0x00);
        au0828_writereg(d, 0x111, 0x00);
        au0828_writereg(d, 0x114, w & 0xff);
        au0828_writereg(d, 0x115, w >> 8);
        /* set y position */
        au0828_writereg(d, 0x112, 0x00);
        au0828_writereg(d, 0x113, 0x00);
        au0828_writereg(d, 0x116, h & 0xff);
        au0828_writereg(d, 0x117, h >> 8);
        au0828_writereg(d, AU0828_SENSORCTRL_100, 0xb3);

        return 0;
}

static int au0828_analog_stream_disable(struct au0828_dev *d)
{
        dprintk(1, "au0828_analog_stream_disable called\n");
        au0828_writereg(d, AU0828_SENSORCTRL_100, 0x0);
        return 0;
}

static void au0828_analog_stream_reset(struct au0828_dev *dev)
{
        dprintk(1, "au0828_analog_stream_reset called\n");
        au0828_writereg(dev, AU0828_SENSORCTRL_100, 0x0);
        mdelay(30);
        au0828_writereg(dev, AU0828_SENSORCTRL_100, 0xb3);
}

/*
 * Some operations needs to stop current streaming
 */
static int au0828_stream_interrupt(struct au0828_dev *dev)
{
        dev->stream_state = STREAM_INTERRUPT;
        if (test_bit(DEV_DISCONNECTED, &dev->dev_state))
                return -ENODEV;
        return 0;
}

int au0828_start_analog_streaming(struct vb2_queue *vq, unsigned int count)
{
        struct au0828_dev *dev = vb2_get_drv_priv(vq);
        int rc = 0;

        dprintk(1, "au0828_start_analog_streaming called %d\n",
                dev->streaming_users);

        if (vq->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
                dev->frame_count = 0;
        else
                dev->vbi_frame_count = 0;

        if (dev->streaming_users == 0) {
                /* If we were doing ac97 instead of i2s, it would go here...*/
                au0828_i2s_init(dev);
                rc = au0828_init_isoc(dev, AU0828_ISO_PACKETS_PER_URB,
                                   AU0828_MAX_ISO_BUFS, dev->max_pkt_size,
                                   au0828_isoc_copy);
                if (rc < 0) {
                        pr_info("au0828_init_isoc failed\n");
                        return rc;
                }

                v4l2_device_call_all(&dev->v4l2_dev, 0, video, s_stream, 1);

                if (vq->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
                        dev->vid_timeout_running = 1;
                        mod_timer(&dev->vid_timeout, jiffies + (HZ / 10));
                } else if (vq->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
                        dev->vbi_timeout_running = 1;
                        mod_timer(&dev->vbi_timeout, jiffies + (HZ / 10));
                }
        }
        dev->streaming_users++;
        return rc;
}

static void au0828_stop_streaming(struct vb2_queue *vq)
{
        struct au0828_dev *dev = vb2_get_drv_priv(vq);
        struct au0828_dmaqueue *vidq = &dev->vidq;
        unsigned long flags = 0;

        dprintk(1, "au0828_stop_streaming called %d\n", dev->streaming_users);

        if (dev->streaming_users-- == 1) {
                au0828_uninit_isoc(dev);
                v4l2_device_call_all(&dev->v4l2_dev, 0, video, s_stream, 0);
        }

        dev->vid_timeout_running = 0;
        timer_delete_sync(&dev->vid_timeout);

        spin_lock_irqsave(&dev->slock, flags);
        if (dev->isoc_ctl.buf != NULL) {
                vb2_buffer_done(&dev->isoc_ctl.buf->vb.vb2_buf,
                                VB2_BUF_STATE_ERROR);
                dev->isoc_ctl.buf = NULL;
        }
        while (!list_empty(&vidq->active)) {
                struct au0828_buffer *buf;

                buf = list_entry(vidq->active.next, struct au0828_buffer, list);
                vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
                list_del(&buf->list);
        }
        spin_unlock_irqrestore(&dev->slock, flags);
}

void au0828_stop_vbi_streaming(struct vb2_queue *vq)
{
        struct au0828_dev *dev = vb2_get_drv_priv(vq);
        struct au0828_dmaqueue *vbiq = &dev->vbiq;
        unsigned long flags = 0;

        dprintk(1, "au0828_stop_vbi_streaming called %d\n",
                dev->streaming_users);

        if (dev->streaming_users-- == 1) {
                au0828_uninit_isoc(dev);
                v4l2_device_call_all(&dev->v4l2_dev, 0, video, s_stream, 0);
        }

        spin_lock_irqsave(&dev->slock, flags);
        if (dev->isoc_ctl.vbi_buf != NULL) {
                vb2_buffer_done(&dev->isoc_ctl.vbi_buf->vb.vb2_buf,
                                VB2_BUF_STATE_ERROR);
                dev->isoc_ctl.vbi_buf = NULL;
        }
        while (!list_empty(&vbiq->active)) {
                struct au0828_buffer *buf;

                buf = list_entry(vbiq->active.next, struct au0828_buffer, list);
                list_del(&buf->list);
                vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
        }
        spin_unlock_irqrestore(&dev->slock, flags);

        dev->vbi_timeout_running = 0;
        timer_delete_sync(&dev->vbi_timeout);
}

static const struct vb2_ops au0828_video_qops = {
        .queue_setup     = queue_setup,
        .buf_prepare     = buffer_prepare,
        .buf_queue       = buffer_queue,
        .prepare_streaming = v4l_vb2q_enable_media_source,
        .start_streaming = au0828_start_analog_streaming,
        .stop_streaming  = au0828_stop_streaming,
};

/* ------------------------------------------------------------------
   V4L2 interface
   ------------------------------------------------------------------*/
/*
 * au0828_analog_unregister
 * unregister v4l2 devices
 */
int au0828_analog_unregister(struct au0828_dev *dev)
{
        dprintk(1, "au0828_analog_unregister called\n");

        /* No analog TV */
        if (AUVI_INPUT(0).type == AU0828_VMUX_UNDEFINED)
                return 0;

        mutex_lock(&au0828_sysfs_lock);
        vb2_video_unregister_device(&dev->vdev);
        vb2_video_unregister_device(&dev->vbi_dev);
        mutex_unlock(&au0828_sysfs_lock);

        v4l2_device_disconnect(&dev->v4l2_dev);
        v4l2_device_put(&dev->v4l2_dev);

        return 1;
}

/* This function ensures that video frames continue to be delivered even if
   the ITU-656 input isn't receiving any data (thereby preventing applications
   such as tvtime from hanging) */
static void au0828_vid_buffer_timeout(struct timer_list *t)
{
        struct au0828_dev *dev = timer_container_of(dev, t, vid_timeout);
        struct au0828_dmaqueue *dma_q = &dev->vidq;
        struct au0828_buffer *buf;
        unsigned char *vid_data;
        unsigned long flags = 0;

        spin_lock_irqsave(&dev->slock, flags);

        buf = dev->isoc_ctl.buf;
        if (buf != NULL) {
                vid_data = vb2_plane_vaddr(&buf->vb.vb2_buf, 0);
                memset(vid_data, 0x00, buf->length); /* Blank green frame */
                buffer_filled(dev, dma_q, buf);
        }
        get_next_buf(dma_q, &buf);

        if (dev->vid_timeout_running == 1)
                mod_timer(&dev->vid_timeout, jiffies + (HZ / 10));

        spin_unlock_irqrestore(&dev->slock, flags);
}

static void au0828_vbi_buffer_timeout(struct timer_list *t)
{
        struct au0828_dev *dev = timer_container_of(dev, t, vbi_timeout);
        struct au0828_dmaqueue *dma_q = &dev->vbiq;
        struct au0828_buffer *buf;
        unsigned char *vbi_data;
        unsigned long flags = 0;

        spin_lock_irqsave(&dev->slock, flags);

        buf = dev->isoc_ctl.vbi_buf;
        if (buf != NULL) {
                vbi_data = vb2_plane_vaddr(&buf->vb.vb2_buf, 0);
                memset(vbi_data, 0x00, buf->length);
                buffer_filled(dev, dma_q, buf);
        }
        vbi_get_next_buf(dma_q, &buf);

        if (dev->vbi_timeout_running == 1)
                mod_timer(&dev->vbi_timeout, jiffies + (HZ / 10));
        spin_unlock_irqrestore(&dev->slock, flags);
}

static int au0828_v4l2_open(struct file *filp)
{
        struct au0828_dev *dev = video_drvdata(filp);
        int ret;

        dprintk(1,
                "%s called std_set %d dev_state %ld stream users %d users %d\n",
                __func__, dev->std_set_in_tuner_core, dev->dev_state,
                dev->streaming_users, dev->users);

        if (mutex_lock_interruptible(&dev->lock))
                return -ERESTARTSYS;

        ret = v4l2_fh_open(filp);
        if (ret) {
                au0828_isocdbg("%s: v4l2_fh_open() returned error %d\n",
                                __func__, ret);
                mutex_unlock(&dev->lock);
                return ret;
        }

        if (dev->users == 0) {
                au0828_analog_stream_enable(dev);
                au0828_analog_stream_reset(dev);
                dev->stream_state = STREAM_OFF;
                set_bit(DEV_INITIALIZED, &dev->dev_state);
        }
        dev->users++;
        mutex_unlock(&dev->lock);
        return ret;
}

static int au0828_v4l2_close(struct file *filp)
{
        int ret;
        struct au0828_dev *dev = video_drvdata(filp);
        struct video_device *vdev = video_devdata(filp);

        dprintk(1,
                "%s called std_set %d dev_state %ld stream users %d users %d\n",
                __func__, dev->std_set_in_tuner_core, dev->dev_state,
                dev->streaming_users, dev->users);

        mutex_lock(&dev->lock);
        if (vdev->vfl_type == VFL_TYPE_VIDEO && dev->vid_timeout_running) {
                /* Cancel timeout thread in case they didn't call streamoff */
                dev->vid_timeout_running = 0;
                timer_delete_sync(&dev->vid_timeout);
        } else if (vdev->vfl_type == VFL_TYPE_VBI &&
                        dev->vbi_timeout_running) {
                /* Cancel timeout thread in case they didn't call streamoff */
                dev->vbi_timeout_running = 0;
                timer_delete_sync(&dev->vbi_timeout);
        }

        if (test_bit(DEV_DISCONNECTED, &dev->dev_state))
                goto end;

        if (dev->users == 1) {
                /*
                 * Avoid putting tuner in sleep if DVB or ALSA are
                 * streaming.
                 *
                 * On most USB devices  like au0828 the tuner can
                 * be safely put in sleep state here if ALSA isn't
                 * streaming. Exceptions are some very old USB tuner
                 * models such as em28xx-based WinTV USB2 which have
                 * a separate audio output jack. The devices that have
                 * a separate audio output jack have analog tuners,
                 * like Philips FM1236. Those devices are always on,
                 * so the s_power callback are silently ignored.
                 * So, the current logic here does the following:
                 * Disable (put tuner to sleep) when
                 * - ALSA and DVB aren't streaming.
                 * - the last V4L2 file handler is closed.
                 *
                 * FIXME:
                 *
                 * Additionally, this logic could be improved to
                 * disable the media source if the above conditions
                 * are met and if the device:
                 * - doesn't have a separate audio out plug (or
                 * - doesn't use a silicon tuner like xc2028/3028/4000/5000).
                 *
                 * Once this additional logic is in place, a callback
                 * is needed to enable the media source and power on
                 * the tuner, for radio to work.
                */
                ret = v4l_enable_media_source(vdev);
                if (ret == 0)
                        v4l2_device_call_all(&dev->v4l2_dev, 0, tuner,
                                             standby);
                dev->std_set_in_tuner_core = 0;

                /* When close the device, set the usb intf0 into alt0 to free
                   USB bandwidth */
                ret = usb_set_interface(dev->usbdev, 0, 0);
                if (ret < 0)
                        pr_info("Au0828 can't set alternate to 0!\n");
        }
end:
        _vb2_fop_release(filp, NULL);
        dev->users--;
        mutex_unlock(&dev->lock);
        return 0;
}

/* Must be called with dev->lock held */
static void au0828_init_tuner(struct au0828_dev *dev)
{
        struct v4l2_frequency f = {
                .frequency = dev->ctrl_freq,
                .type = V4L2_TUNER_ANALOG_TV,
        };

        dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
                dev->std_set_in_tuner_core, dev->dev_state);

        if (dev->std_set_in_tuner_core)
                return;
        dev->std_set_in_tuner_core = 1;
        i2c_gate_ctrl(dev, 1);
        /* If we've never sent the standard in tuner core, do so now.
           We don't do this at device probe because we don't want to
           incur the cost of a firmware load */
        v4l2_device_call_all(&dev->v4l2_dev, 0, video, s_std, dev->std);
        v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_frequency, &f);
        i2c_gate_ctrl(dev, 0);
}

static int au0828_set_format(struct au0828_dev *dev, unsigned int cmd,
                             struct v4l2_format *format)
{
        int ret;
        int width = format->fmt.pix.width;
        int height = format->fmt.pix.height;

        /* If they are demanding a format other than the one we support,
           bail out (tvtime asks for UYVY and then retries with YUYV) */
        if (format->fmt.pix.pixelformat != V4L2_PIX_FMT_UYVY)
                return -EINVAL;

        /* format->fmt.pix.width only support 720 and height 480 */
        if (width != 720)
                width = 720;
        if (height != 480)
                height = 480;

        format->fmt.pix.width = width;
        format->fmt.pix.height = height;
        format->fmt.pix.pixelformat = V4L2_PIX_FMT_UYVY;
        format->fmt.pix.bytesperline = width * 2;
        format->fmt.pix.sizeimage = width * height * 2;
        format->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
        format->fmt.pix.field = V4L2_FIELD_INTERLACED;

        if (cmd == VIDIOC_TRY_FMT)
                return 0;

        /* maybe set new image format, driver current only support 720*480 */
        dev->width = width;
        dev->height = height;
        dev->frame_size = width * height * 2;
        dev->field_size = width * height;
        dev->bytesperline = width * 2;

        if (dev->stream_state == STREAM_ON) {
                dprintk(1, "VIDIOC_SET_FMT: interrupting stream!\n");
                ret = au0828_stream_interrupt(dev);
                if (ret != 0) {
                        dprintk(1, "error interrupting video stream!\n");
                        return ret;
                }
        }

        au0828_analog_stream_enable(dev);

        return 0;
}

static int vidioc_querycap(struct file *file, void  *priv,
                           struct v4l2_capability *cap)
{
        struct au0828_dev *dev = video_drvdata(file);

        dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
                dev->std_set_in_tuner_core, dev->dev_state);

        strscpy(cap->driver, "au0828", sizeof(cap->driver));
        strscpy(cap->card, dev->board.name, sizeof(cap->card));
        usb_make_path(dev->usbdev, cap->bus_info, sizeof(cap->bus_info));

        /* set the device capabilities */
        cap->capabilities =
                V4L2_CAP_AUDIO | V4L2_CAP_READWRITE | V4L2_CAP_STREAMING |
                V4L2_CAP_TUNER | V4L2_CAP_VBI_CAPTURE | V4L2_CAP_VIDEO_CAPTURE |
                V4L2_CAP_DEVICE_CAPS;
        return 0;
}

static int vidioc_enum_fmt_vid_cap(struct file *file, void  *priv,
                                        struct v4l2_fmtdesc *f)
{
        if (f->index)
                return -EINVAL;

        dprintk(1, "%s called\n", __func__);

        f->pixelformat = V4L2_PIX_FMT_UYVY;

        return 0;
}

static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
                                        struct v4l2_format *f)
{
        struct au0828_dev *dev = video_drvdata(file);

        dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
                dev->std_set_in_tuner_core, dev->dev_state);

        f->fmt.pix.width = dev->width;
        f->fmt.pix.height = dev->height;
        f->fmt.pix.pixelformat = V4L2_PIX_FMT_UYVY;
        f->fmt.pix.bytesperline = dev->bytesperline;
        f->fmt.pix.sizeimage = dev->frame_size;
        f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M; /* NTSC/PAL */
        f->fmt.pix.field = V4L2_FIELD_INTERLACED;
        return 0;
}

static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
                                  struct v4l2_format *f)
{
        struct au0828_dev *dev = video_drvdata(file);

        dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
                dev->std_set_in_tuner_core, dev->dev_state);

        return au0828_set_format(dev, VIDIOC_TRY_FMT, f);
}

static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
                                struct v4l2_format *f)
{
        struct au0828_dev *dev = video_drvdata(file);
        int rc;

        dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
                dev->std_set_in_tuner_core, dev->dev_state);

        rc = check_dev(dev);
        if (rc < 0)
                return rc;

        if (vb2_is_busy(&dev->vb_vidq)) {
                pr_info("%s queue busy\n", __func__);
                rc = -EBUSY;
                goto out;
        }

        rc = au0828_set_format(dev, VIDIOC_S_FMT, f);
out:
        return rc;
}

static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id norm)
{
        struct au0828_dev *dev = video_drvdata(file);

        dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
                dev->std_set_in_tuner_core, dev->dev_state);

        if (norm == dev->std)
                return 0;

        if (dev->streaming_users > 0)
                return -EBUSY;

        dev->std = norm;

        au0828_init_tuner(dev);

        i2c_gate_ctrl(dev, 1);

        /*
         * FIXME: when we support something other than 60Hz standards,
         * we are going to have to make the au0828 bridge adjust the size
         * of its capture buffer, which is currently hardcoded at 720x480
         */

        v4l2_device_call_all(&dev->v4l2_dev, 0, video, s_std, norm);

        i2c_gate_ctrl(dev, 0);

        return 0;
}

static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *norm)
{
        struct au0828_dev *dev = video_drvdata(file);

        dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
                dev->std_set_in_tuner_core, dev->dev_state);

        *norm = dev->std;
        return 0;
}

static int vidioc_enum_input(struct file *file, void *priv,
                                struct v4l2_input *input)
{
        struct au0828_dev *dev = video_drvdata(file);
        unsigned int tmp;

        static const char *inames[] = {
                [AU0828_VMUX_UNDEFINED] = "Undefined",
                [AU0828_VMUX_COMPOSITE] = "Composite",
                [AU0828_VMUX_SVIDEO] = "S-Video",
                [AU0828_VMUX_CABLE] = "Cable TV",
                [AU0828_VMUX_TELEVISION] = "Television",
                [AU0828_VMUX_DVB] = "DVB",
        };

        dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
                dev->std_set_in_tuner_core, dev->dev_state);

        tmp = input->index;

        if (tmp >= AU0828_MAX_INPUT)
                return -EINVAL;
        if (AUVI_INPUT(tmp).type == 0)
                return -EINVAL;

        input->index = tmp;
        strscpy(input->name, inames[AUVI_INPUT(tmp).type], sizeof(input->name));
        if ((AUVI_INPUT(tmp).type == AU0828_VMUX_TELEVISION) ||
            (AUVI_INPUT(tmp).type == AU0828_VMUX_CABLE)) {
                input->type |= V4L2_INPUT_TYPE_TUNER;
                input->audioset = 1;
        } else {
                input->type |= V4L2_INPUT_TYPE_CAMERA;
                input->audioset = 2;
        }

        input->std = dev->vdev.tvnorms;

        return 0;
}

static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
{
        struct au0828_dev *dev = video_drvdata(file);

        dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
                dev->std_set_in_tuner_core, dev->dev_state);

        *i = dev->ctrl_input;
        return 0;
}

static void au0828_s_input(struct au0828_dev *dev, int index)
{
        int i;

        dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
                dev->std_set_in_tuner_core, dev->dev_state);

        switch (AUVI_INPUT(index).type) {
        case AU0828_VMUX_SVIDEO:
                dev->input_type = AU0828_VMUX_SVIDEO;
                dev->ctrl_ainput = 1;
                break;
        case AU0828_VMUX_COMPOSITE:
                dev->input_type = AU0828_VMUX_COMPOSITE;
                dev->ctrl_ainput = 1;
                break;
        case AU0828_VMUX_TELEVISION:
                dev->input_type = AU0828_VMUX_TELEVISION;
                dev->ctrl_ainput = 0;
                break;
        default:
                dprintk(1, "unknown input type set [%d]\n",
                        AUVI_INPUT(index).type);
                return;
        }

        dev->ctrl_input = index;

        v4l2_device_call_all(&dev->v4l2_dev, 0, video, s_routing,
                        AUVI_INPUT(index).vmux, 0, 0);

        for (i = 0; i < AU0828_MAX_INPUT; i++) {
                int enable = 0;
                if (AUVI_INPUT(i).audio_setup == NULL)
                        continue;

                if (i == index)
                        enable = 1;
                else
                        enable = 0;
                if (enable) {
                        (AUVI_INPUT(i).audio_setup)(dev, enable);
                } else {
                        /* Make sure we leave it turned on if some
                           other input is routed to this callback */
                        if ((AUVI_INPUT(i).audio_setup) !=
                            ((AUVI_INPUT(index).audio_setup))) {
                                (AUVI_INPUT(i).audio_setup)(dev, enable);
                        }
                }
        }

        v4l2_device_call_all(&dev->v4l2_dev, 0, audio, s_routing,
                        AUVI_INPUT(index).amux, 0, 0);
}

static int vidioc_s_input(struct file *file, void *priv, unsigned int index)
{
        struct au0828_dev *dev = video_drvdata(file);
        struct video_device *vfd = video_devdata(file);

        dprintk(1, "VIDIOC_S_INPUT in function %s, input=%d\n", __func__,
                index);
        if (index >= AU0828_MAX_INPUT)
                return -EINVAL;
        if (AUVI_INPUT(index).type == 0)
                return -EINVAL;

        if (dev->ctrl_input == index)
                return 0;

        au0828_s_input(dev, index);

        /*
         * Input has been changed. Disable the media source
         * associated with the old input and enable source
         * for the newly set input
         */
        v4l_disable_media_source(vfd);
        return v4l_enable_media_source(vfd);
}

static int vidioc_enumaudio(struct file *file, void *priv, struct v4l2_audio *a)
{
        if (a->index > 1)
                return -EINVAL;

        dprintk(1, "%s called\n", __func__);

        if (a->index == 0)
                strscpy(a->name, "Television", sizeof(a->name));
        else
                strscpy(a->name, "Line in", sizeof(a->name));

        a->capability = V4L2_AUDCAP_STEREO;
        return 0;
}

static int vidioc_g_audio(struct file *file, void *priv, struct v4l2_audio *a)
{
        struct au0828_dev *dev = video_drvdata(file);

        dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
                dev->std_set_in_tuner_core, dev->dev_state);

        a->index = dev->ctrl_ainput;
        if (a->index == 0)
                strscpy(a->name, "Television", sizeof(a->name));
        else
                strscpy(a->name, "Line in", sizeof(a->name));

        a->capability = V4L2_AUDCAP_STEREO;
        return 0;
}

static int vidioc_s_audio(struct file *file, void *priv, const struct v4l2_audio *a)
{
        struct au0828_dev *dev = video_drvdata(file);

        if (a->index != dev->ctrl_ainput)
                return -EINVAL;

        dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
                dev->std_set_in_tuner_core, dev->dev_state);
        return 0;
}

static int vidioc_g_tuner(struct file *file, void *priv, struct v4l2_tuner *t)
{
        struct au0828_dev *dev = video_drvdata(file);
        struct video_device *vfd = video_devdata(file);
        int ret;

        if (t->index != 0)
                return -EINVAL;

        ret = v4l_enable_media_source(vfd);
        if (ret)
                return ret;

        dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
                dev->std_set_in_tuner_core, dev->dev_state);

        strscpy(t->name, "Auvitek tuner", sizeof(t->name));

        au0828_init_tuner(dev);
        i2c_gate_ctrl(dev, 1);
        v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, g_tuner, t);
        i2c_gate_ctrl(dev, 0);
        return 0;
}

static int vidioc_s_tuner(struct file *file, void *priv,
                                const struct v4l2_tuner *t)
{
        struct au0828_dev *dev = video_drvdata(file);

        if (t->index != 0)
                return -EINVAL;

        dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
                dev->std_set_in_tuner_core, dev->dev_state);

        au0828_init_tuner(dev);
        i2c_gate_ctrl(dev, 1);
        v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_tuner, t);
        i2c_gate_ctrl(dev, 0);

        dprintk(1, "VIDIOC_S_TUNER: signal = %x, afc = %x\n", t->signal,
                t->afc);

        return 0;

}

static int vidioc_g_frequency(struct file *file, void *priv,
                                struct v4l2_frequency *freq)
{
        struct au0828_dev *dev = video_drvdata(file);

        if (freq->tuner != 0)
                return -EINVAL;
        dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
                dev->std_set_in_tuner_core, dev->dev_state);
        freq->frequency = dev->ctrl_freq;
        return 0;
}

static int vidioc_s_frequency(struct file *file, void *priv,
                                const struct v4l2_frequency *freq)
{
        struct au0828_dev *dev = video_drvdata(file);
        struct v4l2_frequency new_freq = *freq;

        if (freq->tuner != 0)
                return -EINVAL;

        dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
                dev->std_set_in_tuner_core, dev->dev_state);

        au0828_init_tuner(dev);
        i2c_gate_ctrl(dev, 1);

        v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_frequency, freq);
        /* Get the actual set (and possibly clamped) frequency */
        v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, g_frequency, &new_freq);
        dev->ctrl_freq = new_freq.frequency;

        i2c_gate_ctrl(dev, 0);

        au0828_analog_stream_reset(dev);

        return 0;
}


/* RAW VBI ioctls */

static int vidioc_g_fmt_vbi_cap(struct file *file, void *priv,
                                struct v4l2_format *format)
{
        struct au0828_dev *dev = video_drvdata(file);

        dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
                dev->std_set_in_tuner_core, dev->dev_state);

        format->fmt.vbi.samples_per_line = dev->vbi_width;
        format->fmt.vbi.sample_format = V4L2_PIX_FMT_GREY;
        format->fmt.vbi.offset = 0;
        format->fmt.vbi.flags = 0;
        format->fmt.vbi.sampling_rate = 6750000 * 4 / 2;

        format->fmt.vbi.count[0] = dev->vbi_height;
        format->fmt.vbi.count[1] = dev->vbi_height;
        format->fmt.vbi.start[0] = 21;
        format->fmt.vbi.start[1] = 284;
        memset(format->fmt.vbi.reserved, 0, sizeof(format->fmt.vbi.reserved));

        return 0;
}

static int vidioc_g_pixelaspect(struct file *file, void *priv,
                                int type, struct v4l2_fract *f)
{
        struct au0828_dev *dev = video_drvdata(file);

        if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
                return -EINVAL;

        dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
                dev->std_set_in_tuner_core, dev->dev_state);

        f->numerator = 54;
        f->denominator = 59;

        return 0;
}

static int vidioc_g_selection(struct file *file, void *priv,
                              struct v4l2_selection *s)
{
        struct au0828_dev *dev = video_drvdata(file);

        if (s->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
                return -EINVAL;

        switch (s->target) {
        case V4L2_SEL_TGT_CROP_BOUNDS:
        case V4L2_SEL_TGT_CROP_DEFAULT:
                s->r.left = 0;
                s->r.top = 0;
                s->r.width = dev->width;
                s->r.height = dev->height;
                break;
        default:
                return -EINVAL;
        }
        return 0;
}

#ifdef CONFIG_VIDEO_ADV_DEBUG
static int vidioc_g_register(struct file *file, void *priv,
                             struct v4l2_dbg_register *reg)
{
        struct au0828_dev *dev = video_drvdata(file);

        dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
                dev->std_set_in_tuner_core, dev->dev_state);

        reg->val = au0828_read(dev, reg->reg);
        reg->size = 1;
        return 0;
}

static int vidioc_s_register(struct file *file, void *priv,
                             const struct v4l2_dbg_register *reg)
{
        struct au0828_dev *dev = video_drvdata(file);

        dprintk(1, "%s called std_set %d dev_state %ld\n", __func__,
                dev->std_set_in_tuner_core, dev->dev_state);

        return au0828_writereg(dev, reg->reg, reg->val);
}
#endif

static int vidioc_log_status(struct file *file, void *fh)
{
        struct video_device *vdev = video_devdata(file);

        dprintk(1, "%s called\n", __func__);

        v4l2_ctrl_log_status(file, fh);
        v4l2_device_call_all(vdev->v4l2_dev, 0, core, log_status);
        return 0;
}

void au0828_v4l2_suspend(struct au0828_dev *dev)
{
        struct urb *urb;
        int i;

        pr_info("stopping V4L2\n");

        if (dev->stream_state == STREAM_ON) {
                pr_info("stopping V4L2 active URBs\n");
                au0828_analog_stream_disable(dev);
                /* stop urbs */
                for (i = 0; i < dev->isoc_ctl.num_bufs; i++) {
                        urb = dev->isoc_ctl.urb[i];
                        if (urb) {
                                if (!irqs_disabled())
                                        usb_kill_urb(urb);
                                else
                                        usb_unlink_urb(urb);
                        }
                }
        }

        if (dev->vid_timeout_running)
                timer_delete_sync(&dev->vid_timeout);
        if (dev->vbi_timeout_running)
                timer_delete_sync(&dev->vbi_timeout);
}

void au0828_v4l2_resume(struct au0828_dev *dev)
{
        int i, rc;

        pr_info("restarting V4L2\n");

        if (dev->stream_state == STREAM_ON) {
                au0828_stream_interrupt(dev);
                au0828_init_tuner(dev);
        }

        if (dev->vid_timeout_running)
                mod_timer(&dev->vid_timeout, jiffies + (HZ / 10));
        if (dev->vbi_timeout_running)
                mod_timer(&dev->vbi_timeout, jiffies + (HZ / 10));

        /* If we were doing ac97 instead of i2s, it would go here...*/
        au0828_i2s_init(dev);

        au0828_analog_stream_enable(dev);

        if (!(dev->stream_state == STREAM_ON)) {
                au0828_analog_stream_reset(dev);
                /* submit urbs */
                for (i = 0; i < dev->isoc_ctl.num_bufs; i++) {
                        rc = usb_submit_urb(dev->isoc_ctl.urb[i], GFP_ATOMIC);
                        if (rc) {
                                au0828_isocdbg("submit of urb %i failed (error=%i)\n",
                                               i, rc);
                                au0828_uninit_isoc(dev);
                        }
                }
        }
}

static const struct v4l2_file_operations au0828_v4l_fops = {
        .owner      = THIS_MODULE,
        .open       = au0828_v4l2_open,
        .release    = au0828_v4l2_close,
        .read       = vb2_fop_read,
        .poll       = vb2_fop_poll,
        .mmap       = vb2_fop_mmap,
        .unlocked_ioctl = video_ioctl2,
};

static const struct v4l2_ioctl_ops video_ioctl_ops = {
        .vidioc_querycap            = vidioc_querycap,
        .vidioc_enum_fmt_vid_cap    = vidioc_enum_fmt_vid_cap,
        .vidioc_g_fmt_vid_cap       = vidioc_g_fmt_vid_cap,
        .vidioc_try_fmt_vid_cap     = vidioc_try_fmt_vid_cap,
        .vidioc_s_fmt_vid_cap       = vidioc_s_fmt_vid_cap,
        .vidioc_g_fmt_vbi_cap       = vidioc_g_fmt_vbi_cap,
        .vidioc_try_fmt_vbi_cap     = vidioc_g_fmt_vbi_cap,
        .vidioc_s_fmt_vbi_cap       = vidioc_g_fmt_vbi_cap,
        .vidioc_enumaudio           = vidioc_enumaudio,
        .vidioc_g_audio             = vidioc_g_audio,
        .vidioc_s_audio             = vidioc_s_audio,
        .vidioc_g_pixelaspect       = vidioc_g_pixelaspect,
        .vidioc_g_selection         = vidioc_g_selection,

        .vidioc_reqbufs             = vb2_ioctl_reqbufs,
        .vidioc_create_bufs         = vb2_ioctl_create_bufs,
        .vidioc_prepare_buf         = vb2_ioctl_prepare_buf,
        .vidioc_querybuf            = vb2_ioctl_querybuf,
        .vidioc_qbuf                = vb2_ioctl_qbuf,
        .vidioc_dqbuf               = vb2_ioctl_dqbuf,
        .vidioc_expbuf               = vb2_ioctl_expbuf,

        .vidioc_s_std               = vidioc_s_std,
        .vidioc_g_std               = vidioc_g_std,
        .vidioc_enum_input          = vidioc_enum_input,
        .vidioc_g_input             = vidioc_g_input,
        .vidioc_s_input             = vidioc_s_input,

        .vidioc_streamon            = vb2_ioctl_streamon,
        .vidioc_streamoff           = vb2_ioctl_streamoff,

        .vidioc_g_tuner             = vidioc_g_tuner,
        .vidioc_s_tuner             = vidioc_s_tuner,
        .vidioc_g_frequency         = vidioc_g_frequency,
        .vidioc_s_frequency         = vidioc_s_frequency,
#ifdef CONFIG_VIDEO_ADV_DEBUG
        .vidioc_g_register          = vidioc_g_register,
        .vidioc_s_register          = vidioc_s_register,
#endif
        .vidioc_log_status          = vidioc_log_status,
        .vidioc_subscribe_event     = v4l2_ctrl_subscribe_event,
        .vidioc_unsubscribe_event   = v4l2_event_unsubscribe,
};

static const struct video_device au0828_video_template = {
        .fops                       = &au0828_v4l_fops,
        .release                    = video_device_release_empty,
        .ioctl_ops                  = &video_ioctl_ops,
        .tvnorms                    = V4L2_STD_NTSC_M | V4L2_STD_PAL_M,
};

static int au0828_vb2_setup(struct au0828_dev *dev)
{
        int rc;
        struct vb2_queue *q;

        /* Setup Videobuf2 for Video capture */
        q = &dev->vb_vidq;
        q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
        q->io_modes = VB2_READ | VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
        q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
        q->drv_priv = dev;
        q->buf_struct_size = sizeof(struct au0828_buffer);
        q->ops = &au0828_video_qops;
        q->mem_ops = &vb2_vmalloc_memops;

        rc = vb2_queue_init(q);
        if (rc < 0)
                return rc;

        /* Setup Videobuf2 for VBI capture */
        q = &dev->vb_vbiq;
        q->type = V4L2_BUF_TYPE_VBI_CAPTURE;
        q->io_modes = VB2_READ | VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
        q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
        q->drv_priv = dev;
        q->buf_struct_size = sizeof(struct au0828_buffer);
        q->ops = &au0828_vbi_qops;
        q->mem_ops = &vb2_vmalloc_memops;

        rc = vb2_queue_init(q);
        if (rc < 0)
                return rc;

        return 0;
}

static void au0828_analog_create_entities(struct au0828_dev *dev)
{
#if defined(CONFIG_MEDIA_CONTROLLER)
        static const char * const inames[] = {
                [AU0828_VMUX_COMPOSITE] = "Composite",
                [AU0828_VMUX_SVIDEO] = "S-Video",
                [AU0828_VMUX_CABLE] = "Cable TV",
                [AU0828_VMUX_TELEVISION] = "Television",
                [AU0828_VMUX_DVB] = "DVB",
        };
        int ret, i;

        /* Initialize Video and VBI pads */
        dev->video_pad.flags = MEDIA_PAD_FL_SINK;
        ret = media_entity_pads_init(&dev->vdev.entity, 1, &dev->video_pad);
        if (ret < 0)
                pr_err("failed to initialize video media entity!\n");

        dev->vbi_pad.flags = MEDIA_PAD_FL_SINK;
        ret = media_entity_pads_init(&dev->vbi_dev.entity, 1, &dev->vbi_pad);
        if (ret < 0)
                pr_err("failed to initialize vbi media entity!\n");

        /* Create entities for each input connector */
        for (i = 0; i < AU0828_MAX_INPUT; i++) {
                struct media_entity *ent = &dev->input_ent[i];

                if (AUVI_INPUT(i).type == AU0828_VMUX_UNDEFINED)
                        break;

                ent->name = inames[AUVI_INPUT(i).type];
                ent->flags = MEDIA_ENT_FL_CONNECTOR;
                dev->input_pad[i].flags = MEDIA_PAD_FL_SOURCE;

                switch (AUVI_INPUT(i).type) {
                case AU0828_VMUX_COMPOSITE:
                        ent->function = MEDIA_ENT_F_CONN_COMPOSITE;
                        break;
                case AU0828_VMUX_SVIDEO:
                        ent->function = MEDIA_ENT_F_CONN_SVIDEO;
                        break;
                case AU0828_VMUX_CABLE:
                case AU0828_VMUX_TELEVISION:
                case AU0828_VMUX_DVB:
                default: /* Just to shut up a warning */
                        ent->function = MEDIA_ENT_F_CONN_RF;
                        break;
                }

                ret = media_entity_pads_init(ent, 1, &dev->input_pad[i]);
                if (ret < 0)
                        pr_err("failed to initialize input pad[%d]!\n", i);

                ret = media_device_register_entity(dev->media_dev, ent);
                if (ret < 0)
                        pr_err("failed to register input entity %d!\n", i);
        }
#endif
}

/**************************************************************************/

int au0828_analog_register(struct au0828_dev *dev,
                           struct usb_interface *interface)
{
        int retval = -ENOMEM;
        struct usb_host_interface *iface_desc;
        struct usb_endpoint_descriptor *endpoint;
        int i, ret;

        dprintk(1, "au0828_analog_register called for intf#%d!\n",
                interface->cur_altsetting->desc.bInterfaceNumber);

        /* No analog TV */
        if (AUVI_INPUT(0).type == AU0828_VMUX_UNDEFINED)
                return 0;

        /* set au0828 usb interface0 to as5 */
        retval = usb_set_interface(dev->usbdev,
                        interface->cur_altsetting->desc.bInterfaceNumber, 5);
        if (retval != 0) {
                pr_info("Failure setting usb interface0 to as5\n");
                return retval;
        }

        /* Figure out which endpoint has the isoc interface */
        iface_desc = interface->cur_altsetting;
        for (i = 0; i < iface_desc->desc.bNumEndpoints; i++) {
                endpoint = &iface_desc->endpoint[i].desc;
                if (usb_endpoint_dir_in(endpoint) &&
                    (usb_endpoint_type(endpoint)
                     == USB_ENDPOINT_XFER_ISOC)) {

                        /* we find our isoc in endpoint */
                        u16 tmp = le16_to_cpu(endpoint->wMaxPacketSize);
                        dev->max_pkt_size = (tmp & 0x07ff) *
                                (((tmp & 0x1800) >> 11) + 1);
                        dev->isoc_in_endpointaddr = endpoint->bEndpointAddress;
                        dprintk(1,
                                "Found isoc endpoint 0x%02x, max size = %d\n",
                                dev->isoc_in_endpointaddr, dev->max_pkt_size);
                }
        }
        if (!(dev->isoc_in_endpointaddr)) {
                pr_info("Could not locate isoc endpoint\n");
                return -ENODEV;
        }

        init_waitqueue_head(&dev->open);
        spin_lock_init(&dev->slock);

        /* init video dma queues */
        INIT_LIST_HEAD(&dev->vidq.active);
        INIT_LIST_HEAD(&dev->vbiq.active);

        timer_setup(&dev->vid_timeout, au0828_vid_buffer_timeout, 0);
        timer_setup(&dev->vbi_timeout, au0828_vbi_buffer_timeout, 0);

        dev->width = NTSC_STD_W;
        dev->height = NTSC_STD_H;
        dev->field_size = dev->width * dev->height;
        dev->frame_size = dev->field_size << 1;
        dev->bytesperline = dev->width << 1;
        dev->vbi_width = 720;
        dev->vbi_height = 1;
        dev->ctrl_ainput = 0;
        dev->ctrl_freq = 960;
        dev->std = V4L2_STD_NTSC_M;
        /* Default input is TV Tuner */
        au0828_s_input(dev, 0);

        mutex_init(&dev->vb_queue_lock);
        mutex_init(&dev->vb_vbi_queue_lock);

        /* Fill the video capture device struct */
        dev->vdev = au0828_video_template;
        dev->vdev.v4l2_dev = &dev->v4l2_dev;
        dev->vdev.lock = &dev->lock;
        dev->vdev.queue = &dev->vb_vidq;
        dev->vdev.queue->lock = &dev->vb_queue_lock;
        dev->vdev.device_caps =
                V4L2_CAP_AUDIO | V4L2_CAP_READWRITE | V4L2_CAP_STREAMING |
                V4L2_CAP_TUNER | V4L2_CAP_VIDEO_CAPTURE;
        strscpy(dev->vdev.name, "au0828a video", sizeof(dev->vdev.name));

        /* Setup the VBI device */
        dev->vbi_dev = au0828_video_template;
        dev->vbi_dev.v4l2_dev = &dev->v4l2_dev;
        dev->vbi_dev.lock = &dev->lock;
        dev->vbi_dev.queue = &dev->vb_vbiq;
        dev->vbi_dev.queue->lock = &dev->vb_vbi_queue_lock;
        dev->vbi_dev.device_caps =
                V4L2_CAP_AUDIO | V4L2_CAP_READWRITE | V4L2_CAP_STREAMING |
                V4L2_CAP_TUNER | V4L2_CAP_VBI_CAPTURE;
        strscpy(dev->vbi_dev.name, "au0828a vbi", sizeof(dev->vbi_dev.name));

        /* Init entities at the Media Controller */
        au0828_analog_create_entities(dev);

        /* initialize videobuf2 stuff */
        retval = au0828_vb2_setup(dev);
        if (retval != 0) {
                dprintk(1, "unable to setup videobuf2 queues (error = %d).\n",
                        retval);
                return -ENODEV;
        }

        /* Register the v4l2 device */
        video_set_drvdata(&dev->vdev, dev);
        retval = video_register_device(&dev->vdev, VFL_TYPE_VIDEO, -1);
        if (retval != 0) {
                dprintk(1, "unable to register video device (error = %d).\n",
                        retval);
                return -ENODEV;
        }

        /* Register the vbi device */
        video_set_drvdata(&dev->vbi_dev, dev);
        retval = video_register_device(&dev->vbi_dev, VFL_TYPE_VBI, -1);
        if (retval != 0) {
                dprintk(1, "unable to register vbi device (error = %d).\n",
                        retval);
                ret = -ENODEV;
                goto err_reg_vbi_dev;
        }

#ifdef CONFIG_MEDIA_CONTROLLER
        retval = v4l2_mc_create_media_graph(dev->media_dev);
        if (retval) {
                pr_err("%s() au0282_dev_register failed to create graph\n",
                        __func__);
                ret = -ENODEV;
                goto err_reg_vbi_dev;
        }
#endif

        dprintk(1, "%s completed!\n", __func__);

        return 0;

err_reg_vbi_dev:
        vb2_video_unregister_device(&dev->vdev);
        return ret;
}