// SPDX-License-Identifier: GPL-2.0-or-later
/*
   cx231xx-video.c - driver for Conexant Cx23100/101/102
                     USB video capture devices

   Copyright (C) 2008 <srinivasa.deevi at conexant dot com>
        Based on em28xx driver
        Based on cx23885 driver
        Based on cx88 driver

 */

#include "cx231xx.h"
#include <linux/init.h>
#include <linux/list.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/bitmap.h>
#include <linux/i2c.h>
#include <linux/mm.h>
#include <linux/mutex.h>
#include <linux/slab.h>

#include <media/v4l2-common.h>
#include <media/v4l2-ioctl.h>
#include <media/v4l2-event.h>
#include <media/drv-intf/msp3400.h>
#include <media/tuner.h>

#include <media/dvb_frontend.h>

#include "cx231xx-vbi.h"

#define CX231XX_VERSION "0.0.3"

#define DRIVER_AUTHOR   "Srinivasa Deevi <srinivasa.deevi@conexant.com>"
#define DRIVER_DESC     "Conexant cx231xx based USB video device driver"

#define cx231xx_videodbg(fmt, arg...) do {\
        if (video_debug) \
                printk(KERN_INFO "%s %s :"fmt, \
                         dev->name, __func__ , ##arg); } while (0)

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

#define cx231xx_isocdbg(fmt, arg...) \
do {\
        if (isoc_debug) { \
                printk(KERN_INFO "%s %s :"fmt, \
                         dev->name, __func__ , ##arg); \
        } \
  } while (0)

MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");
MODULE_VERSION(CX231XX_VERSION);

static unsigned int card[]     = {[0 ... (CX231XX_MAXBOARDS - 1)] = -1U };
static unsigned int video_nr[] = {[0 ... (CX231XX_MAXBOARDS - 1)] = -1U };
static unsigned int vbi_nr[]   = {[0 ... (CX231XX_MAXBOARDS - 1)] = -1U };
static unsigned int radio_nr[] = {[0 ... (CX231XX_MAXBOARDS - 1)] = -1U };

module_param_array(card, int, NULL, 0444);
module_param_array(video_nr, int, NULL, 0444);
module_param_array(vbi_nr, int, NULL, 0444);
module_param_array(radio_nr, int, NULL, 0444);

MODULE_PARM_DESC(card, "card type");
MODULE_PARM_DESC(video_nr, "video device numbers");
MODULE_PARM_DESC(vbi_nr, "vbi device numbers");
MODULE_PARM_DESC(radio_nr, "radio device numbers");

static unsigned int video_debug;
module_param(video_debug, int, 0644);
MODULE_PARM_DESC(video_debug, "enable debug messages [video]");

/* supported video standards */
static struct cx231xx_fmt format[] = {
        {
         .fourcc = V4L2_PIX_FMT_YUYV,
         .depth = 16,
         .reg = 0,
         },
};


static int cx231xx_enable_analog_tuner(struct cx231xx *dev)
{
#ifdef CONFIG_MEDIA_CONTROLLER
        struct media_device *mdev = dev->media_dev;
        struct media_entity  *entity, *decoder = NULL, *source;
        struct media_link *link, *found_link = NULL;
        int ret, active_links = 0;

        if (!mdev)
                return 0;

        /*
         * This will find the tuner that is connected into the decoder.
         * Technically, this is not 100% correct, as the device may be
         * using an analog input instead of the tuner. However, as we can't
         * do DVB streaming while the DMA engine is being used for V4L2,
         * this should be enough for the actual needs.
         */
        media_device_for_each_entity(entity, mdev) {
                if (entity->function == MEDIA_ENT_F_ATV_DECODER) {
                        decoder = entity;
                        break;
                }
        }
        if (!decoder)
                return 0;

        list_for_each_entry(link, &decoder->links, list) {
                if (link->sink->entity == decoder) {
                        found_link = link;
                        if (link->flags & MEDIA_LNK_FL_ENABLED)
                                active_links++;
                        break;
                }
        }

        if (active_links == 1 || !found_link)
                return 0;

        source = found_link->source->entity;
        list_for_each_entry(link, &source->links, list) {
                struct media_entity *sink;
                int flags = 0;

                sink = link->sink->entity;

                if (sink == entity)
                        flags = MEDIA_LNK_FL_ENABLED;

                ret = media_entity_setup_link(link, flags);
                if (ret) {
                        dev_err(dev->dev,
                                "Couldn't change link %s->%s to %s. Error %d\n",
                                source->name, sink->name,
                                flags ? "enabled" : "disabled",
                                ret);
                        return ret;
                } else
                        dev_dbg(dev->dev,
                                "link %s->%s was %s\n",
                                source->name, sink->name,
                                flags ? "ENABLED" : "disabled");
        }
#endif
        return 0;
}

/* ------------------------------------------------------------------
        Video buffer and parser functions
   ------------------------------------------------------------------*/

/*
 * Announces that a buffer were filled and request the next
 */
static inline void buffer_filled(struct cx231xx *dev,
                                 struct cx231xx_dmaqueue *dma_q,
                                 struct cx231xx_buffer *buf)
{
        /* Advice that buffer was filled */
        cx231xx_isocdbg("[%p/%d] wakeup\n", buf, buf->vb.vb2_buf.index);
        buf->vb.sequence = dma_q->sequence++;
        buf->vb.field = V4L2_FIELD_INTERLACED;
        buf->vb.vb2_buf.timestamp = ktime_get_ns();
        vb2_set_plane_payload(&buf->vb.vb2_buf, 0, dev->size);

        if (dev->USE_ISO)
                dev->video_mode.isoc_ctl.buf = NULL;
        else
                dev->video_mode.bulk_ctl.buf = NULL;

        list_del(&buf->list);
        vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_DONE);
}

static inline void print_err_status(struct cx231xx *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) {
                cx231xx_isocdbg("URB status %d [%s].\n", status, errmsg);
        } else {
                cx231xx_isocdbg("URB packet %d, status %d [%s].\n",
                                packet, status, errmsg);
        }
}

/*
 * generic routine to get the next available buffer
 */
static inline void get_next_buf(struct cx231xx_dmaqueue *dma_q,
                                struct cx231xx_buffer **buf)
{
        struct cx231xx_video_mode *vmode =
            container_of(dma_q, struct cx231xx_video_mode, vidq);
        struct cx231xx *dev = container_of(vmode, struct cx231xx, video_mode);

        char *outp;

        if (list_empty(&dma_q->active)) {
                cx231xx_isocdbg("No active queue to serve\n");
                if (dev->USE_ISO)
                        dev->video_mode.isoc_ctl.buf = NULL;
                else
                        dev->video_mode.bulk_ctl.buf = NULL;
                *buf = NULL;
                return;
        }

        /* Get the next buffer */
        *buf = list_entry(dma_q->active.next, struct cx231xx_buffer, list);

        /* Cleans up buffer - Useful for testing for frame/URB loss */
        outp = vb2_plane_vaddr(&(*buf)->vb.vb2_buf, 0);
        memset(outp, 0, dev->size);

        if (dev->USE_ISO)
                dev->video_mode.isoc_ctl.buf = *buf;
        else
                dev->video_mode.bulk_ctl.buf = *buf;

        return;
}

/*
 * Controls the isoc copy of each urb packet
 */
static inline int cx231xx_isoc_copy(struct cx231xx *dev, struct urb *urb)
{
        struct cx231xx_dmaqueue *dma_q = urb->context;
        int i;
        unsigned char *p_buffer;
        u32 bytes_parsed = 0, buffer_size = 0;
        u8 sav_eav = 0;

        if (!dev)
                return 0;

        if (dev->state & DEV_DISCONNECTED)
                return 0;

        if (urb->status < 0) {
                print_err_status(dev, -1, urb->status);
                if (urb->status == -ENOENT)
                        return 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) {
                        /* cx231xx_isocdbg("packet %d is empty",i); - spammy */
                        continue;
                }
                if (urb->iso_frame_desc[i].actual_length >
                    dev->video_mode.max_pkt_size) {
                        cx231xx_isocdbg("packet bigger than packet size");
                        continue;
                }

                /*  get buffer pointer and length */
                p_buffer = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
                buffer_size = urb->iso_frame_desc[i].actual_length;
                bytes_parsed = 0;

                if (dma_q->is_partial_line) {
                        /* Handle the case of a partial line */
                        sav_eav = dma_q->last_sav;
                } else {
                        /* Check for a SAV/EAV overlapping
                                the buffer boundary */
                        sav_eav =
                            cx231xx_find_boundary_SAV_EAV(p_buffer,
                                                          dma_q->partial_buf,
                                                          &bytes_parsed);
                }

                sav_eav &= 0xF0;
                /* Get the first line if we have some portion of an SAV/EAV from
                   the last buffer or a partial line  */
                if (sav_eav) {
                        bytes_parsed += cx231xx_get_video_line(dev, dma_q,
                                sav_eav,        /* SAV/EAV */
                                p_buffer + bytes_parsed,        /* p_buffer */
                                buffer_size - bytes_parsed);/* buf size */
                }

                /* Now parse data that is completely in this buffer */
                /* dma_q->is_partial_line = 0;  */

                while (bytes_parsed < buffer_size) {
                        u32 bytes_used = 0;

                        sav_eav = cx231xx_find_next_SAV_EAV(
                                p_buffer + bytes_parsed,        /* p_buffer */
                                buffer_size - bytes_parsed,     /* buf size */
                                &bytes_used);/* bytes used to get SAV/EAV */

                        bytes_parsed += bytes_used;

                        sav_eav &= 0xF0;
                        if (sav_eav && (bytes_parsed < buffer_size)) {
                                bytes_parsed += cx231xx_get_video_line(dev,
                                        dma_q, sav_eav, /* SAV/EAV */
                                        p_buffer + bytes_parsed,/* p_buffer */
                                        buffer_size - bytes_parsed);/*buf size*/
                        }
                }

                /* Save the last four bytes of the buffer so we can check the
                   buffer boundary condition next time */
                memcpy(dma_q->partial_buf, p_buffer + buffer_size - 4, 4);
                bytes_parsed = 0;

        }
        return 1;
}

static inline int cx231xx_bulk_copy(struct cx231xx *dev, struct urb *urb)
{
        struct cx231xx_dmaqueue *dma_q = urb->context;
        unsigned char *p_buffer;
        u32 bytes_parsed = 0, buffer_size = 0;
        u8 sav_eav = 0;

        if (!dev)
                return 0;

        if (dev->state & DEV_DISCONNECTED)
                return 0;

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

        if (1) {

                /*  get buffer pointer and length */
                p_buffer = urb->transfer_buffer;
                buffer_size = urb->actual_length;
                bytes_parsed = 0;

                if (dma_q->is_partial_line) {
                        /* Handle the case of a partial line */
                        sav_eav = dma_q->last_sav;
                } else {
                        /* Check for a SAV/EAV overlapping
                                the buffer boundary */
                        sav_eav =
                            cx231xx_find_boundary_SAV_EAV(p_buffer,
                                                          dma_q->partial_buf,
                                                          &bytes_parsed);
                }

                sav_eav &= 0xF0;
                /* Get the first line if we have some portion of an SAV/EAV from
                   the last buffer or a partial line  */
                if (sav_eav) {
                        bytes_parsed += cx231xx_get_video_line(dev, dma_q,
                                sav_eav,        /* SAV/EAV */
                                p_buffer + bytes_parsed,        /* p_buffer */
                                buffer_size - bytes_parsed);/* buf size */
                }

                /* Now parse data that is completely in this buffer */
                /* dma_q->is_partial_line = 0;  */

                while (bytes_parsed < buffer_size) {
                        u32 bytes_used = 0;

                        sav_eav = cx231xx_find_next_SAV_EAV(
                                p_buffer + bytes_parsed,        /* p_buffer */
                                buffer_size - bytes_parsed,     /* buf size */
                                &bytes_used);/* bytes used to get SAV/EAV */

                        bytes_parsed += bytes_used;

                        sav_eav &= 0xF0;
                        if (sav_eav && (bytes_parsed < buffer_size)) {
                                bytes_parsed += cx231xx_get_video_line(dev,
                                        dma_q, sav_eav, /* SAV/EAV */
                                        p_buffer + bytes_parsed,/* p_buffer */
                                        buffer_size - bytes_parsed);/*buf size*/
                        }
                }

                /* Save the last four bytes of the buffer so we can check the
                   buffer boundary condition next time */
                memcpy(dma_q->partial_buf, p_buffer + buffer_size - 4, 4);
                bytes_parsed = 0;

        }
        return 1;
}


u8 cx231xx_find_boundary_SAV_EAV(u8 *p_buffer, u8 *partial_buf,
                                 u32 *p_bytes_used)
{
        u32 bytes_used;
        u8 boundary_bytes[8];
        u8 sav_eav = 0;

        *p_bytes_used = 0;

        /* Create an array of the last 4 bytes of the last buffer and the first
           4 bytes of the current buffer. */

        memcpy(boundary_bytes, partial_buf, 4);
        memcpy(boundary_bytes + 4, p_buffer, 4);

        /* Check for the SAV/EAV in the boundary buffer */
        sav_eav = cx231xx_find_next_SAV_EAV((u8 *)&boundary_bytes, 8,
                                            &bytes_used);

        if (sav_eav) {
                /* found a boundary SAV/EAV.  Updates the bytes used to reflect
                   only those used in the new buffer */
                *p_bytes_used = bytes_used - 4;
        }

        return sav_eav;
}

u8 cx231xx_find_next_SAV_EAV(u8 *p_buffer, u32 buffer_size, u32 *p_bytes_used)
{
        u32 i;
        u8 sav_eav = 0;

        /*
         * Don't search if the buffer size is less than 4.  It causes a page
         * fault since buffer_size - 4 evaluates to a large number in that
         * case.
         */
        if (buffer_size < 4) {
                *p_bytes_used = buffer_size;
                return 0;
        }

        for (i = 0; i < (buffer_size - 3); i++) {

                if ((p_buffer[i] == 0xFF) &&
                    (p_buffer[i + 1] == 0x00) && (p_buffer[i + 2] == 0x00)) {

                        *p_bytes_used = i + 4;
                        sav_eav = p_buffer[i + 3];
                        return sav_eav;
                }
        }

        *p_bytes_used = buffer_size;
        return 0;
}

u32 cx231xx_get_video_line(struct cx231xx *dev,
                           struct cx231xx_dmaqueue *dma_q, u8 sav_eav,
                           u8 *p_buffer, u32 buffer_size)
{
        u32 bytes_copied = 0;
        int current_field = -1;

        switch (sav_eav) {
        case SAV_ACTIVE_VIDEO_FIELD1:
                /* looking for skipped line which occurred in PAL 720x480 mode.
                   In this case, there will be no active data contained
                   between the SAV and EAV */
                if ((buffer_size > 3) && (p_buffer[0] == 0xFF) &&
                    (p_buffer[1] == 0x00) && (p_buffer[2] == 0x00) &&
                    ((p_buffer[3] == EAV_ACTIVE_VIDEO_FIELD1) ||
                     (p_buffer[3] == EAV_ACTIVE_VIDEO_FIELD2) ||
                     (p_buffer[3] == EAV_VBLANK_FIELD1) ||
                     (p_buffer[3] == EAV_VBLANK_FIELD2)))
                        return bytes_copied;
                current_field = 1;
                break;

        case SAV_ACTIVE_VIDEO_FIELD2:
                /* looking for skipped line which occurred in PAL 720x480 mode.
                   In this case, there will be no active data contained between
                   the SAV and EAV */
                if ((buffer_size > 3) && (p_buffer[0] == 0xFF) &&
                    (p_buffer[1] == 0x00) && (p_buffer[2] == 0x00) &&
                    ((p_buffer[3] == EAV_ACTIVE_VIDEO_FIELD1) ||
                     (p_buffer[3] == EAV_ACTIVE_VIDEO_FIELD2) ||
                     (p_buffer[3] == EAV_VBLANK_FIELD1)       ||
                     (p_buffer[3] == EAV_VBLANK_FIELD2)))
                        return bytes_copied;
                current_field = 2;
                break;
        }

        dma_q->last_sav = sav_eav;

        bytes_copied = cx231xx_copy_video_line(dev, dma_q, p_buffer,
                                               buffer_size, current_field);

        return bytes_copied;
}

u32 cx231xx_copy_video_line(struct cx231xx *dev,
                            struct cx231xx_dmaqueue *dma_q, u8 *p_line,
                            u32 length, int field_number)
{
        u32 bytes_to_copy;
        struct cx231xx_buffer *buf;
        u32 _line_size = dev->width * 2;

        if (dma_q->current_field != field_number)
                cx231xx_reset_video_buffer(dev, dma_q);

        /* get the buffer pointer */
        if (dev->USE_ISO)
                buf = dev->video_mode.isoc_ctl.buf;
        else
                buf = dev->video_mode.bulk_ctl.buf;

        /* Remember the field number for next time */
        dma_q->current_field = field_number;

        bytes_to_copy = dma_q->bytes_left_in_line;
        if (bytes_to_copy > length)
                bytes_to_copy = length;

        if (dma_q->lines_completed >= dma_q->lines_per_field) {
                dma_q->bytes_left_in_line -= bytes_to_copy;
                dma_q->is_partial_line = (dma_q->bytes_left_in_line == 0) ?
                                          0 : 1;
                return 0;
        }

        dma_q->is_partial_line = 1;

        /* If we don't have a buffer, just return the number of bytes we would
           have copied if we had a buffer. */
        if (!buf) {
                dma_q->bytes_left_in_line -= bytes_to_copy;
                dma_q->is_partial_line = (dma_q->bytes_left_in_line == 0)
                                         ? 0 : 1;
                return bytes_to_copy;
        }

        /* copy the data to video buffer */
        cx231xx_do_copy(dev, dma_q, p_line, bytes_to_copy);

        dma_q->pos += bytes_to_copy;
        dma_q->bytes_left_in_line -= bytes_to_copy;

        if (dma_q->bytes_left_in_line == 0) {
                dma_q->bytes_left_in_line = _line_size;
                dma_q->lines_completed++;
                dma_q->is_partial_line = 0;

                if (cx231xx_is_buffer_done(dev, dma_q) && buf) {
                        buffer_filled(dev, dma_q, buf);

                        dma_q->pos = 0;
                        buf = NULL;
                        dma_q->lines_completed = 0;
                }
        }

        return bytes_to_copy;
}

void cx231xx_reset_video_buffer(struct cx231xx *dev,
                                struct cx231xx_dmaqueue *dma_q)
{
        struct cx231xx_buffer *buf;

        /* handle the switch from field 1 to field 2 */
        if (dma_q->current_field == 1) {
                if (dma_q->lines_completed >= dma_q->lines_per_field)
                        dma_q->field1_done = 1;
                else
                        dma_q->field1_done = 0;
        }

        if (dev->USE_ISO)
                buf = dev->video_mode.isoc_ctl.buf;
        else
                buf = dev->video_mode.bulk_ctl.buf;

        if (buf == NULL) {
                /* first try to get the buffer */
                get_next_buf(dma_q, &buf);

                dma_q->pos = 0;
                dma_q->field1_done = 0;
                dma_q->current_field = -1;
        }

        /* reset the counters */
        dma_q->bytes_left_in_line = dev->width << 1;
        dma_q->lines_completed = 0;
}

int cx231xx_do_copy(struct cx231xx *dev, struct cx231xx_dmaqueue *dma_q,
                    u8 *p_buffer, u32 bytes_to_copy)
{
        u8 *p_out_buffer = NULL;
        u32 current_line_bytes_copied = 0;
        struct cx231xx_buffer *buf;
        u32 _line_size = dev->width << 1;
        void *startwrite;
        int offset, lencopy;

        if (dev->USE_ISO)
                buf = dev->video_mode.isoc_ctl.buf;
        else
                buf = dev->video_mode.bulk_ctl.buf;

        if (buf == NULL)
                return -1;

        p_out_buffer = vb2_plane_vaddr(&buf->vb.vb2_buf, 0);

        current_line_bytes_copied = _line_size - dma_q->bytes_left_in_line;

        /* Offset field 2 one line from the top of the buffer */
        offset = (dma_q->current_field == 1) ? 0 : _line_size;

        /* Offset for field 2 */
        startwrite = p_out_buffer + offset;

        /* lines already completed in the current field */
        startwrite += (dma_q->lines_completed * _line_size * 2);

        /* bytes already completed in the current line */
        startwrite += current_line_bytes_copied;

        lencopy = dma_q->bytes_left_in_line > bytes_to_copy ?
                  bytes_to_copy : dma_q->bytes_left_in_line;

        if ((u8 *)(startwrite + lencopy) > (u8 *)(p_out_buffer + dev->size))
                return 0;

        /* The below copies the UYVY data straight into video buffer */
        cx231xx_swab((u16 *) p_buffer, (u16 *) startwrite, (u16) lencopy);

        return 0;
}

void cx231xx_swab(u16 *from, u16 *to, u16 len)
{
        u16 i;

        if (len <= 0)
                return;

        for (i = 0; i < len / 2; i++)
                to[i] = (from[i] << 8) | (from[i] >> 8);
}

u8 cx231xx_is_buffer_done(struct cx231xx *dev, struct cx231xx_dmaqueue *dma_q)
{
        u8 buffer_complete = 0;

        /* Dual field stream */
        buffer_complete = ((dma_q->current_field == 2) &&
                           (dma_q->lines_completed >= dma_q->lines_per_field) &&
                            dma_q->field1_done);

        return buffer_complete;
}

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

static int queue_setup(struct vb2_queue *vq,
                       unsigned int *nbuffers, unsigned int *nplanes,
                       unsigned int sizes[], struct device *alloc_devs[])
{
        struct cx231xx *dev = vb2_get_drv_priv(vq);
        unsigned int q_num_bufs = vb2_get_num_buffers(vq);

        dev->size = (dev->width * dev->height * dev->format->depth + 7) >> 3;

        if (q_num_bufs + *nbuffers < CX231XX_MIN_BUF)
                *nbuffers = CX231XX_MIN_BUF - q_num_bufs;

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

        return 0;
}

static void buffer_queue(struct vb2_buffer *vb)
{
        struct cx231xx_buffer *buf =
            container_of(vb, struct cx231xx_buffer, vb.vb2_buf);
        struct cx231xx *dev = vb2_get_drv_priv(vb->vb2_queue);
        struct cx231xx_dmaqueue *vidq = &dev->video_mode.vidq;
        unsigned long flags;

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

static void return_all_buffers(struct cx231xx *dev,
                               enum vb2_buffer_state state)
{
        struct cx231xx_dmaqueue *vidq = &dev->video_mode.vidq;
        struct cx231xx_buffer *buf, *node;
        unsigned long flags;

        spin_lock_irqsave(&dev->video_mode.slock, flags);
        if (dev->USE_ISO)
                dev->video_mode.isoc_ctl.buf = NULL;
        else
                dev->video_mode.bulk_ctl.buf = NULL;
        list_for_each_entry_safe(buf, node, &vidq->active, list) {
                list_del(&buf->list);
                vb2_buffer_done(&buf->vb.vb2_buf, state);
        }
        spin_unlock_irqrestore(&dev->video_mode.slock, flags);
}

static int start_streaming(struct vb2_queue *vq, unsigned int count)
{
        struct cx231xx *dev = vb2_get_drv_priv(vq);
        struct cx231xx_dmaqueue *vidq = &dev->video_mode.vidq;
        int ret = 0;

        vidq->sequence = 0;
        dev->mode_tv = 0;

        cx231xx_enable_analog_tuner(dev);
        if (dev->USE_ISO)
                ret = cx231xx_init_isoc(dev, CX231XX_NUM_PACKETS,
                                        CX231XX_NUM_BUFS,
                                        dev->video_mode.max_pkt_size,
                                        cx231xx_isoc_copy);
        else
                ret = cx231xx_init_bulk(dev, CX231XX_NUM_PACKETS,
                                        CX231XX_NUM_BUFS,
                                        dev->video_mode.max_pkt_size,
                                        cx231xx_bulk_copy);
        if (ret)
                return_all_buffers(dev, VB2_BUF_STATE_QUEUED);
        call_all(dev, video, s_stream, 1);
        return ret;
}

static void stop_streaming(struct vb2_queue *vq)
{
        struct cx231xx *dev = vb2_get_drv_priv(vq);

        call_all(dev, video, s_stream, 0);
        return_all_buffers(dev, VB2_BUF_STATE_ERROR);
}

static const struct vb2_ops cx231xx_video_qops = {
        .queue_setup            = queue_setup,
        .buf_queue              = buffer_queue,
        .start_streaming        = start_streaming,
        .stop_streaming         = stop_streaming,
};

/*********************  v4l2 interface  **************************************/

void video_mux(struct cx231xx *dev, int index)
{
        dev->video_input = index;
        dev->ctl_ainput = INPUT(index)->amux;

        cx231xx_set_video_input_mux(dev, index);

        cx25840_call(dev, video, s_routing, INPUT(index)->vmux, 0, 0);

        cx231xx_set_audio_input(dev, dev->ctl_ainput);

        dev_dbg(dev->dev, "video_mux : %d\n", index);

        /* do mode control overrides if required */
        cx231xx_do_mode_ctrl_overrides(dev);
}

/* ------------------------------------------------------------------
        IOCTL vidioc handling
   ------------------------------------------------------------------*/

static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
                                struct v4l2_format *f)
{
        struct cx231xx *dev = video_drvdata(file);

        f->fmt.pix.width = dev->width;
        f->fmt.pix.height = dev->height;
        f->fmt.pix.pixelformat = dev->format->fourcc;
        f->fmt.pix.bytesperline = (dev->width * dev->format->depth + 7) >> 3;
        f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * dev->height;
        f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;

        f->fmt.pix.field = V4L2_FIELD_INTERLACED;

        return 0;
}

static struct cx231xx_fmt *format_by_fourcc(unsigned int fourcc)
{
        unsigned int i;

        for (i = 0; i < ARRAY_SIZE(format); i++)
                if (format[i].fourcc == fourcc)
                        return &format[i];

        return NULL;
}

static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
                                  struct v4l2_format *f)
{
        struct cx231xx *dev = video_drvdata(file);
        unsigned int width = f->fmt.pix.width;
        unsigned int height = f->fmt.pix.height;
        unsigned int maxw = norm_maxw(dev);
        unsigned int maxh = norm_maxh(dev);
        struct cx231xx_fmt *fmt;

        fmt = format_by_fourcc(f->fmt.pix.pixelformat);
        if (!fmt) {
                cx231xx_videodbg("Fourcc format (%08x) invalid.\n",
                                 f->fmt.pix.pixelformat);
                return -EINVAL;
        }

        /* width must even because of the YUYV format
           height must be even because of interlacing */
        v4l_bound_align_image(&width, 48, maxw, 1, &height, 32, maxh, 1, 0);

        f->fmt.pix.width = width;
        f->fmt.pix.height = height;
        f->fmt.pix.pixelformat = fmt->fourcc;
        f->fmt.pix.bytesperline = (width * fmt->depth + 7) >> 3;
        f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * height;
        f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
        f->fmt.pix.field = V4L2_FIELD_INTERLACED;

        return 0;
}

static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
                                struct v4l2_format *f)
{
        struct cx231xx *dev = video_drvdata(file);
        struct v4l2_subdev_format format = {
                .which = V4L2_SUBDEV_FORMAT_ACTIVE,
        };
        int rc;

        rc = vidioc_try_fmt_vid_cap(file, priv, f);
        if (rc)
                return rc;

        if (vb2_is_busy(&dev->vidq)) {
                dev_err(dev->dev, "%s: queue busy\n", __func__);
                return -EBUSY;
        }

        /* set new image size */
        dev->width = f->fmt.pix.width;
        dev->height = f->fmt.pix.height;
        dev->format = format_by_fourcc(f->fmt.pix.pixelformat);

        v4l2_fill_mbus_format(&format.format, &f->fmt.pix, MEDIA_BUS_FMT_FIXED);
        call_all(dev, pad, set_fmt, NULL, &format);
        v4l2_fill_pix_format(&f->fmt.pix, &format.format);

        return rc;
}

static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *id)
{
        struct cx231xx *dev = video_drvdata(file);

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

static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id norm)
{
        struct cx231xx *dev = video_drvdata(file);
        struct v4l2_subdev_format format = {
                .which = V4L2_SUBDEV_FORMAT_ACTIVE,
        };

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

        if (vb2_is_busy(&dev->vidq))
                return -EBUSY;

        dev->norm = norm;

        /* Adjusts width/height, if needed */
        dev->width = 720;
        dev->height = (dev->norm & V4L2_STD_625_50) ? 576 : 480;

        call_all(dev, video, s_std, dev->norm);

        /* We need to reset basic properties in the decoder related to
           resolution (since a standard change effects things like the number
           of lines in VACT, etc) */
        format.format.code = MEDIA_BUS_FMT_FIXED;
        format.format.width = dev->width;
        format.format.height = dev->height;
        call_all(dev, pad, set_fmt, NULL, &format);

        /* do mode control overrides */
        cx231xx_do_mode_ctrl_overrides(dev);

        return 0;
}

static const char *iname[] = {
        [CX231XX_VMUX_COMPOSITE1] = "Composite1",
        [CX231XX_VMUX_SVIDEO]     = "S-Video",
        [CX231XX_VMUX_TELEVISION] = "Television",
        [CX231XX_VMUX_CABLE]      = "Cable TV",
        [CX231XX_VMUX_DVB]        = "DVB",
};

void cx231xx_v4l2_create_entities(struct cx231xx *dev)
{
#if defined(CONFIG_MEDIA_CONTROLLER)
        int ret, i;

        /* Create entities for each input connector */
        for (i = 0; i < MAX_CX231XX_INPUT; i++) {
                struct media_entity *ent = &dev->input_ent[i];

                if (!INPUT(i)->type)
                        break;

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

                switch (INPUT(i)->type) {
                case CX231XX_VMUX_COMPOSITE1:
                        ent->function = MEDIA_ENT_F_CONN_COMPOSITE;
                        break;
                case CX231XX_VMUX_SVIDEO:
                        ent->function = MEDIA_ENT_F_CONN_SVIDEO;
                        break;
                case CX231XX_VMUX_TELEVISION:
                case CX231XX_VMUX_CABLE:
                case CX231XX_VMUX_DVB:
                        /* The DVB core will handle it */
                        if (dev->tuner_type == TUNER_ABSENT)
                                continue;
                        fallthrough;
                default: /* just to shut up a gcc 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 cx231xx_enum_input(struct file *file, void *priv,
                             struct v4l2_input *i)
{
        struct cx231xx *dev = video_drvdata(file);
        u32 gen_stat;
        unsigned int n;
        int ret;

        n = i->index;
        if (n >= MAX_CX231XX_INPUT)
                return -EINVAL;
        if (0 == INPUT(n)->type)
                return -EINVAL;

        i->index = n;
        i->type = V4L2_INPUT_TYPE_CAMERA;

        strscpy(i->name, iname[INPUT(n)->type], sizeof(i->name));

        if ((CX231XX_VMUX_TELEVISION == INPUT(n)->type) ||
            (CX231XX_VMUX_CABLE == INPUT(n)->type))
                i->type = V4L2_INPUT_TYPE_TUNER;

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

        /* If they are asking about the active input, read signal status */
        if (n == dev->video_input) {
                ret = cx231xx_read_i2c_data(dev, VID_BLK_I2C_ADDRESS,
                                            GEN_STAT, 2, &gen_stat, 4);
                if (ret > 0) {
                        if ((gen_stat & FLD_VPRES) == 0x00)
                                i->status |= V4L2_IN_ST_NO_SIGNAL;
                        if ((gen_stat & FLD_HLOCK) == 0x00)
                                i->status |= V4L2_IN_ST_NO_H_LOCK;
                }
        }

        return 0;
}

int cx231xx_g_input(struct file *file, void *priv, unsigned int *i)
{
        struct cx231xx *dev = video_drvdata(file);

        *i = dev->video_input;

        return 0;
}

int cx231xx_s_input(struct file *file, void *priv, unsigned int i)
{
        struct cx231xx *dev = video_drvdata(file);

        dev->mode_tv = 0;

        if (i >= MAX_CX231XX_INPUT)
                return -EINVAL;
        if (0 == INPUT(i)->type)
                return -EINVAL;

        video_mux(dev, i);

        if (INPUT(i)->type == CX231XX_VMUX_TELEVISION ||
            INPUT(i)->type == CX231XX_VMUX_CABLE) {
                /* There's a tuner, so reset the standard and put it on the
                   last known frequency (since it was probably powered down
                   until now */
                call_all(dev, video, s_std, dev->norm);
        }

        return 0;
}

int cx231xx_g_tuner(struct file *file, void *priv, struct v4l2_tuner *t)
{
        struct cx231xx *dev = video_drvdata(file);

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

        strscpy(t->name, "Tuner", sizeof(t->name));

        t->type = V4L2_TUNER_ANALOG_TV;
        t->capability = V4L2_TUNER_CAP_NORM;
        t->rangehigh = 0xffffffffUL;
        t->signal = 0xffff;     /* LOCKED */
        call_all(dev, tuner, g_tuner, t);

        return 0;
}

int cx231xx_s_tuner(struct file *file, void *priv, const struct v4l2_tuner *t)
{
        if (0 != t->index)
                return -EINVAL;
        return 0;
}

int cx231xx_g_frequency(struct file *file, void *priv,
                              struct v4l2_frequency *f)
{
        struct cx231xx *dev = video_drvdata(file);

        if (f->tuner)
                return -EINVAL;

        f->frequency = dev->ctl_freq;

        return 0;
}

int cx231xx_s_frequency(struct file *file, void *priv,
                              const struct v4l2_frequency *f)
{
        struct cx231xx *dev = video_drvdata(file);
        struct v4l2_frequency new_freq = *f;
        int rc, need_if_freq = 0;
        u32 if_frequency = 5400000;

        dev_dbg(dev->dev,
                "Enter vidioc_s_frequency()f->frequency=%d;f->type=%d\n",
                f->frequency, f->type);

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

        /* set pre channel change settings in DIF first */
        rc = cx231xx_tuner_pre_channel_change(dev);

        switch (dev->model) { /* i2c device tuners */
        case CX231XX_BOARD_HAUPPAUGE_930C_HD_1114xx:
        case CX231XX_BOARD_HAUPPAUGE_935C:
        case CX231XX_BOARD_HAUPPAUGE_955Q:
        case CX231XX_BOARD_HAUPPAUGE_975:
        case CX231XX_BOARD_EVROMEDIA_FULL_HYBRID_FULLHD:
                if (dev->cx231xx_set_analog_freq)
                        dev->cx231xx_set_analog_freq(dev, f->frequency);
                dev->ctl_freq = f->frequency;
                need_if_freq = 1;
                break;
        default:
                call_all(dev, tuner, s_frequency, f);
                call_all(dev, tuner, g_frequency, &new_freq);
                dev->ctl_freq = new_freq.frequency;
                break;
        }

        pr_debug("%s() %u  :  %u\n", __func__, f->frequency, dev->ctl_freq);

        /* set post channel change settings in DIF first */
        rc = cx231xx_tuner_post_channel_change(dev);

        if (need_if_freq || dev->tuner_type == TUNER_NXP_TDA18271) {
                if (dev->norm & (V4L2_STD_MN | V4L2_STD_NTSC_443))
                        if_frequency = 5400000;  /*5.4MHz       */
                else if (dev->norm & V4L2_STD_B)
                        if_frequency = 6000000;  /*6.0MHz       */
                else if (dev->norm & (V4L2_STD_PAL_DK | V4L2_STD_SECAM_DK))
                        if_frequency = 6900000;  /*6.9MHz       */
                else if (dev->norm & V4L2_STD_GH)
                        if_frequency = 7100000;  /*7.1MHz       */
                else if (dev->norm & V4L2_STD_PAL_I)
                        if_frequency = 7250000;  /*7.25MHz      */
                else if (dev->norm & V4L2_STD_SECAM_L)
                        if_frequency = 6900000;  /*6.9MHz       */
                else if (dev->norm & V4L2_STD_SECAM_LC)
                        if_frequency = 1250000;  /*1.25MHz      */

                dev_dbg(dev->dev,
                        "if_frequency is set to %d\n", if_frequency);
                cx231xx_set_Colibri_For_LowIF(dev, if_frequency, 1, 1);

                update_HH_register_after_set_DIF(dev);
        }

        dev_dbg(dev->dev, "Set New FREQUENCY to %d\n", f->frequency);

        return rc;
}

#ifdef CONFIG_VIDEO_ADV_DEBUG

int cx231xx_g_chip_info(struct file *file, void *fh,
                        struct v4l2_dbg_chip_info *chip)
{
        switch (chip->match.addr) {
        case 0: /* Cx231xx - internal registers */
                return 0;
        case 1: /* AFE - read byte */
                strscpy(chip->name, "AFE (byte)", sizeof(chip->name));
                return 0;
        case 2: /* Video Block - read byte */
                strscpy(chip->name, "Video (byte)", sizeof(chip->name));
                return 0;
        case 3: /* I2S block - read byte */
                strscpy(chip->name, "I2S (byte)", sizeof(chip->name));
                return 0;
        case 4: /* AFE - read dword */
                strscpy(chip->name, "AFE (dword)", sizeof(chip->name));
                return 0;
        case 5: /* Video Block - read dword */
                strscpy(chip->name, "Video (dword)", sizeof(chip->name));
                return 0;
        case 6: /* I2S Block - read dword */
                strscpy(chip->name, "I2S (dword)", sizeof(chip->name));
                return 0;
        }
        return -EINVAL;
}

int cx231xx_g_register(struct file *file, void *priv,
                             struct v4l2_dbg_register *reg)
{
        struct cx231xx *dev = video_drvdata(file);
        int ret;
        u8 value[4] = { 0, 0, 0, 0 };
        u32 data = 0;

        switch (reg->match.addr) {
        case 0: /* Cx231xx - internal registers */
                ret = cx231xx_read_ctrl_reg(dev, VRT_GET_REGISTER,
                                (u16)reg->reg, value, 4);
                reg->val = value[0] | value[1] << 8 |
                        value[2] << 16 | (u32)value[3] << 24;
                reg->size = 4;
                break;
        case 1: /* AFE - read byte */
                ret = cx231xx_read_i2c_data(dev, AFE_DEVICE_ADDRESS,
                                (u16)reg->reg, 2, &data, 1);
                reg->val = data;
                reg->size = 1;
                break;
        case 2: /* Video Block - read byte */
                ret = cx231xx_read_i2c_data(dev, VID_BLK_I2C_ADDRESS,
                                (u16)reg->reg, 2, &data, 1);
                reg->val = data;
                reg->size = 1;
                break;
        case 3: /* I2S block - read byte */
                ret = cx231xx_read_i2c_data(dev, I2S_BLK_DEVICE_ADDRESS,
                                (u16)reg->reg, 1, &data, 1);
                reg->val = data;
                reg->size = 1;
                break;
        case 4: /* AFE - read dword */
                ret = cx231xx_read_i2c_data(dev, AFE_DEVICE_ADDRESS,
                                (u16)reg->reg, 2, &data, 4);
                reg->val = data;
                reg->size = 4;
                break;
        case 5: /* Video Block - read dword */
                ret = cx231xx_read_i2c_data(dev, VID_BLK_I2C_ADDRESS,
                                (u16)reg->reg, 2, &data, 4);
                reg->val = data;
                reg->size = 4;
                break;
        case 6: /* I2S Block - read dword */
                ret = cx231xx_read_i2c_data(dev, I2S_BLK_DEVICE_ADDRESS,
                                (u16)reg->reg, 1, &data, 4);
                reg->val = data;
                reg->size = 4;
                break;
        default:
                return -EINVAL;
        }
        return ret < 0 ? ret : 0;
}

int cx231xx_s_register(struct file *file, void *priv,
                             const struct v4l2_dbg_register *reg)
{
        struct cx231xx *dev = video_drvdata(file);
        int ret;
        u8 data[4] = { 0, 0, 0, 0 };

        switch (reg->match.addr) {
        case 0: /* cx231xx internal registers */
                data[0] = (u8) reg->val;
                data[1] = (u8) (reg->val >> 8);
                data[2] = (u8) (reg->val >> 16);
                data[3] = (u8) (reg->val >> 24);
                ret = cx231xx_write_ctrl_reg(dev, VRT_SET_REGISTER,
                                (u16)reg->reg, data, 4);
                break;
        case 1: /* AFE - write byte */
                ret = cx231xx_write_i2c_data(dev, AFE_DEVICE_ADDRESS,
                                (u16)reg->reg, 2, reg->val, 1);
                break;
        case 2: /* Video Block - write byte */
                ret = cx231xx_write_i2c_data(dev, VID_BLK_I2C_ADDRESS,
                                (u16)reg->reg, 2, reg->val, 1);
                break;
        case 3: /* I2S block - write byte */
                ret = cx231xx_write_i2c_data(dev, I2S_BLK_DEVICE_ADDRESS,
                                (u16)reg->reg, 1, reg->val, 1);
                break;
        case 4: /* AFE - write dword */
                ret = cx231xx_write_i2c_data(dev, AFE_DEVICE_ADDRESS,
                                (u16)reg->reg, 2, reg->val, 4);
                break;
        case 5: /* Video Block - write dword */
                ret = cx231xx_write_i2c_data(dev, VID_BLK_I2C_ADDRESS,
                                (u16)reg->reg, 2, reg->val, 4);
                break;
        case 6: /* I2S block - write dword */
                ret = cx231xx_write_i2c_data(dev, I2S_BLK_DEVICE_ADDRESS,
                                (u16)reg->reg, 1, reg->val, 4);
                break;
        default:
                return -EINVAL;
        }
        return ret < 0 ? ret : 0;
}
#endif

static int vidioc_g_pixelaspect(struct file *file, void *priv,
                                int type, struct v4l2_fract *f)
{
        struct cx231xx *dev = video_drvdata(file);
        bool is_50hz = dev->norm & V4L2_STD_625_50;

        if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
                return -EINVAL;

        f->numerator = is_50hz ? 54 : 11;
        f->denominator = is_50hz ? 59 : 10;

        return 0;
}

static int vidioc_g_selection(struct file *file, void *priv,
                              struct v4l2_selection *s)
{
        struct cx231xx *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;
}

int cx231xx_querycap(struct file *file, void *priv,
                           struct v4l2_capability *cap)
{
        struct cx231xx *dev = video_drvdata(file);

        strscpy(cap->driver, "cx231xx", sizeof(cap->driver));
        strscpy(cap->card, cx231xx_boards[dev->model].name, sizeof(cap->card));
        usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info));
        cap->capabilities = V4L2_CAP_READWRITE |
                V4L2_CAP_VBI_CAPTURE | V4L2_CAP_VIDEO_CAPTURE |
                V4L2_CAP_STREAMING | V4L2_CAP_DEVICE_CAPS;
        if (video_is_registered(&dev->radio_dev))
                cap->capabilities |= V4L2_CAP_RADIO;

        switch (dev->model) {
        case CX231XX_BOARD_HAUPPAUGE_930C_HD_1114xx:
        case CX231XX_BOARD_HAUPPAUGE_935C:
        case CX231XX_BOARD_HAUPPAUGE_955Q:
        case CX231XX_BOARD_HAUPPAUGE_975:
        case CX231XX_BOARD_EVROMEDIA_FULL_HYBRID_FULLHD:
                cap->capabilities |= V4L2_CAP_TUNER;
                break;
        default:
                if (dev->tuner_type != TUNER_ABSENT)
                        cap->capabilities |= V4L2_CAP_TUNER;
                break;
        }
        return 0;
}

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

        f->pixelformat = format[f->index].fourcc;

        return 0;
}

/* RAW VBI ioctls */

static int vidioc_g_fmt_vbi_cap(struct file *file, void *priv,
                                struct v4l2_format *f)
{
        struct cx231xx *dev = video_drvdata(file);

        f->fmt.vbi.sampling_rate = 6750000 * 4;
        f->fmt.vbi.samples_per_line = VBI_LINE_LENGTH;
        f->fmt.vbi.sample_format = V4L2_PIX_FMT_GREY;
        f->fmt.vbi.offset = 0;
        f->fmt.vbi.start[0] = (dev->norm & V4L2_STD_625_50) ?
            PAL_VBI_START_LINE : NTSC_VBI_START_LINE;
        f->fmt.vbi.count[0] = (dev->norm & V4L2_STD_625_50) ?
            PAL_VBI_LINES : NTSC_VBI_LINES;
        f->fmt.vbi.start[1] = (dev->norm & V4L2_STD_625_50) ?
            PAL_VBI_START_LINE + 312 : NTSC_VBI_START_LINE + 263;
        f->fmt.vbi.count[1] = f->fmt.vbi.count[0];
        memset(f->fmt.vbi.reserved, 0, sizeof(f->fmt.vbi.reserved));

        return 0;

}

static int vidioc_try_fmt_vbi_cap(struct file *file, void *priv,
                                  struct v4l2_format *f)
{
        struct cx231xx *dev = video_drvdata(file);

        f->fmt.vbi.sampling_rate = 6750000 * 4;
        f->fmt.vbi.samples_per_line = VBI_LINE_LENGTH;
        f->fmt.vbi.sample_format = V4L2_PIX_FMT_GREY;
        f->fmt.vbi.offset = 0;
        f->fmt.vbi.flags = 0;
        f->fmt.vbi.start[0] = (dev->norm & V4L2_STD_625_50) ?
            PAL_VBI_START_LINE : NTSC_VBI_START_LINE;
        f->fmt.vbi.count[0] = (dev->norm & V4L2_STD_625_50) ?
            PAL_VBI_LINES : NTSC_VBI_LINES;
        f->fmt.vbi.start[1] = (dev->norm & V4L2_STD_625_50) ?
            PAL_VBI_START_LINE + 312 : NTSC_VBI_START_LINE + 263;
        f->fmt.vbi.count[1] = f->fmt.vbi.count[0];
        memset(f->fmt.vbi.reserved, 0, sizeof(f->fmt.vbi.reserved));

        return 0;

}

static int vidioc_s_fmt_vbi_cap(struct file *file, void *priv,
                                  struct v4l2_format *f)
{
        return vidioc_try_fmt_vbi_cap(file, priv, f);
}

/* ----------------------------------------------------------- */
/* RADIO ESPECIFIC IOCTLS                                      */
/* ----------------------------------------------------------- */

static int radio_g_tuner(struct file *file, void *priv, struct v4l2_tuner *t)
{
        struct cx231xx *dev = video_drvdata(file);

        if (t->index)
                return -EINVAL;

        strscpy(t->name, "Radio", sizeof(t->name));

        call_all(dev, tuner, g_tuner, t);

        return 0;
}
static int radio_s_tuner(struct file *file, void *priv, const struct v4l2_tuner *t)
{
        struct cx231xx *dev = video_drvdata(file);

        if (t->index)
                return -EINVAL;

        call_all(dev, tuner, s_tuner, t);

        return 0;
}

/*
 * cx231xx_v4l2_open()
 * inits the device and starts isoc transfer
 */
static int cx231xx_v4l2_open(struct file *filp)
{
        struct video_device *vdev = video_devdata(filp);
        struct cx231xx *dev = video_drvdata(filp);
        int ret;

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

        ret = v4l2_fh_open(filp);
        if (ret) {
                mutex_unlock(&dev->lock);
                return ret;
        }

        if (dev->users++ == 0) {
                /* Power up in Analog TV mode */
                if (dev->board.external_av)
                        cx231xx_set_power_mode(dev,
                                 POLARIS_AVMODE_ENXTERNAL_AV);
                else
                        cx231xx_set_power_mode(dev, POLARIS_AVMODE_ANALOGT_TV);

                /* set video alternate setting */
                cx231xx_set_video_alternate(dev);

                /* Needed, since GPIO might have disabled power of
                   some i2c device */
                cx231xx_config_i2c(dev);

                /* device needs to be initialized before isoc transfer */
                dev->video_input = dev->video_input > 2 ? 2 : dev->video_input;
        }

        if (vdev->vfl_type == VFL_TYPE_RADIO) {
                cx231xx_videodbg("video_open: setting radio device\n");

                /* cx231xx_start_radio(dev); */

                call_all(dev, tuner, s_radio);
        }
        if (vdev->vfl_type == VFL_TYPE_VBI) {
                /* Set the required alternate setting  VBI interface works in
                   Bulk mode only */
                cx231xx_set_alt_setting(dev, INDEX_VANC, 0);
        }
        mutex_unlock(&dev->lock);
        return 0;
}

/*
 * cx231xx_realease_resources()
 * unregisters the v4l2,i2c and usb devices
 * called when the device gets disconnected or at module unload
*/
void cx231xx_release_analog_resources(struct cx231xx *dev)
{

        /*FIXME: I2C IR should be disconnected */

        if (video_is_registered(&dev->radio_dev))
                video_unregister_device(&dev->radio_dev);
        if (video_is_registered(&dev->vbi_dev)) {
                dev_info(dev->dev, "V4L2 device %s deregistered\n",
                        video_device_node_name(&dev->vbi_dev));
                video_unregister_device(&dev->vbi_dev);
        }
        if (video_is_registered(&dev->vdev)) {
                dev_info(dev->dev, "V4L2 device %s deregistered\n",
                        video_device_node_name(&dev->vdev));

                if (dev->board.has_417)
                        cx231xx_417_unregister(dev);

                video_unregister_device(&dev->vdev);
        }
        v4l2_ctrl_handler_free(&dev->ctrl_handler);
        v4l2_ctrl_handler_free(&dev->radio_ctrl_handler);
}

/*
 * cx231xx_close()
 * stops streaming and deallocates all resources allocated by the v4l2
 * calls and ioctls
 */
static int cx231xx_close(struct file *filp)
{
        struct cx231xx *dev = video_drvdata(filp);
        struct video_device *vdev = video_devdata(filp);

        _vb2_fop_release(filp, NULL);

        if (--dev->users == 0) {
                /* Save some power by putting tuner to sleep */
                call_all(dev, tuner, standby);

                /* do this before setting alternate! */
                if (dev->USE_ISO)
                        cx231xx_uninit_isoc(dev);
                else
                        cx231xx_uninit_bulk(dev);
                cx231xx_set_mode(dev, CX231XX_SUSPEND);
        }

        /*
         * To workaround error number=-71 on EP0 for VideoGrabber,
         *       need exclude following.
         * FIXME: It is probably safe to remove most of these, as we're
         * now avoiding the alternate setting for INDEX_VANC
         */
        if (!dev->board.no_alt_vanc && vdev->vfl_type == VFL_TYPE_VBI) {
                /* do this before setting alternate! */
                cx231xx_uninit_vbi_isoc(dev);

                /* set alternate 0 */
                if (!dev->vbi_or_sliced_cc_mode)
                        cx231xx_set_alt_setting(dev, INDEX_VANC, 0);
                else
                        cx231xx_set_alt_setting(dev, INDEX_HANC, 0);

                wake_up_interruptible_nr(&dev->open, 1);
                return 0;
        }

        if (dev->users == 0) {
                /* set alternate 0 */
                cx231xx_set_alt_setting(dev, INDEX_VIDEO, 0);
        }

        wake_up_interruptible(&dev->open);
        return 0;
}

static int cx231xx_v4l2_close(struct file *filp)
{
        struct cx231xx *dev = video_drvdata(filp);
        int rc;

        mutex_lock(&dev->lock);
        rc = cx231xx_close(filp);
        mutex_unlock(&dev->lock);
        return rc;
}

static const struct v4l2_file_operations cx231xx_v4l_fops = {
        .owner   = THIS_MODULE,
        .open    = cx231xx_v4l2_open,
        .release = cx231xx_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               = cx231xx_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_try_fmt_vbi_cap,
        .vidioc_s_fmt_vbi_cap          = vidioc_s_fmt_vbi_cap,
        .vidioc_g_pixelaspect          = vidioc_g_pixelaspect,
        .vidioc_g_selection            = vidioc_g_selection,
        .vidioc_reqbufs                = vb2_ioctl_reqbufs,
        .vidioc_querybuf               = vb2_ioctl_querybuf,
        .vidioc_qbuf                   = vb2_ioctl_qbuf,
        .vidioc_dqbuf                  = vb2_ioctl_dqbuf,
        .vidioc_s_std                  = vidioc_s_std,
        .vidioc_g_std                  = vidioc_g_std,
        .vidioc_enum_input             = cx231xx_enum_input,
        .vidioc_g_input                = cx231xx_g_input,
        .vidioc_s_input                = cx231xx_s_input,
        .vidioc_streamon               = vb2_ioctl_streamon,
        .vidioc_streamoff              = vb2_ioctl_streamoff,
        .vidioc_g_tuner                = cx231xx_g_tuner,
        .vidioc_s_tuner                = cx231xx_s_tuner,
        .vidioc_g_frequency            = cx231xx_g_frequency,
        .vidioc_s_frequency            = cx231xx_s_frequency,
#ifdef CONFIG_VIDEO_ADV_DEBUG
        .vidioc_g_chip_info            = cx231xx_g_chip_info,
        .vidioc_g_register             = cx231xx_g_register,
        .vidioc_s_register             = cx231xx_s_register,
#endif
        .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
        .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
};

static struct video_device cx231xx_vbi_template;

static const struct video_device cx231xx_video_template = {
        .fops         = &cx231xx_v4l_fops,
        .release      = video_device_release_empty,
        .ioctl_ops    = &video_ioctl_ops,
        .tvnorms      = V4L2_STD_ALL,
};

static const struct v4l2_file_operations radio_fops = {
        .owner   = THIS_MODULE,
        .open   = cx231xx_v4l2_open,
        .release = cx231xx_v4l2_close,
        .poll = v4l2_ctrl_poll,
        .unlocked_ioctl = video_ioctl2,
};

static const struct v4l2_ioctl_ops radio_ioctl_ops = {
        .vidioc_querycap    = cx231xx_querycap,
        .vidioc_g_tuner     = radio_g_tuner,
        .vidioc_s_tuner     = radio_s_tuner,
        .vidioc_g_frequency = cx231xx_g_frequency,
        .vidioc_s_frequency = cx231xx_s_frequency,
#ifdef CONFIG_VIDEO_ADV_DEBUG
        .vidioc_g_chip_info = cx231xx_g_chip_info,
        .vidioc_g_register  = cx231xx_g_register,
        .vidioc_s_register  = cx231xx_s_register,
#endif
        .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
        .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
};

static struct video_device cx231xx_radio_template = {
        .name      = "cx231xx-radio",
        .fops      = &radio_fops,
        .ioctl_ops = &radio_ioctl_ops,
};

/******************************** usb interface ******************************/

static void cx231xx_vdev_init(struct cx231xx *dev,
                struct video_device *vfd,
                const struct video_device *template,
                const char *type_name)
{
        *vfd = *template;
        vfd->v4l2_dev = &dev->v4l2_dev;
        vfd->release = video_device_release_empty;
        vfd->lock = &dev->lock;

        snprintf(vfd->name, sizeof(vfd->name), "%s %s", dev->name, type_name);

        video_set_drvdata(vfd, dev);
        if (dev->tuner_type == TUNER_ABSENT) {
                switch (dev->model) {
                case CX231XX_BOARD_HAUPPAUGE_930C_HD_1114xx:
                case CX231XX_BOARD_HAUPPAUGE_935C:
                case CX231XX_BOARD_HAUPPAUGE_955Q:
                case CX231XX_BOARD_HAUPPAUGE_975:
                case CX231XX_BOARD_EVROMEDIA_FULL_HYBRID_FULLHD:
                        break;
                default:
                        v4l2_disable_ioctl(vfd, VIDIOC_G_FREQUENCY);
                        v4l2_disable_ioctl(vfd, VIDIOC_S_FREQUENCY);
                        v4l2_disable_ioctl(vfd, VIDIOC_G_TUNER);
                        v4l2_disable_ioctl(vfd, VIDIOC_S_TUNER);
                        break;
                }
        }
}

int cx231xx_register_analog_devices(struct cx231xx *dev)
{
        struct vb2_queue *q;
        int ret;

        dev_info(dev->dev, "v4l2 driver version %s\n", CX231XX_VERSION);

        /* set default norm */
        dev->norm = V4L2_STD_PAL;
        dev->width = norm_maxw(dev);
        dev->height = norm_maxh(dev);
        dev->interlaced = 0;

        /* Analog specific initialization */
        dev->format = &format[0];

        /* Set the initial input */
        video_mux(dev, dev->video_input);

        call_all(dev, video, s_std, dev->norm);

        v4l2_ctrl_handler_init(&dev->ctrl_handler, 10);
        v4l2_ctrl_handler_init(&dev->radio_ctrl_handler, 5);

        if (dev->sd_cx25840) {
                v4l2_ctrl_add_handler(&dev->ctrl_handler,
                                dev->sd_cx25840->ctrl_handler, NULL, true);
                v4l2_ctrl_add_handler(&dev->radio_ctrl_handler,
                                dev->sd_cx25840->ctrl_handler,
                                v4l2_ctrl_radio_filter, true);
        }

        if (dev->ctrl_handler.error)
                return dev->ctrl_handler.error;
        if (dev->radio_ctrl_handler.error)
                return dev->radio_ctrl_handler.error;

        /* enable vbi capturing */
        /* write code here...  */

        /* allocate and fill video video_device struct */
        cx231xx_vdev_init(dev, &dev->vdev, &cx231xx_video_template, "video");
#if defined(CONFIG_MEDIA_CONTROLLER)
        dev->video_pad.flags = MEDIA_PAD_FL_SINK;
        ret = media_entity_pads_init(&dev->vdev.entity, 1, &dev->video_pad);
        if (ret < 0)
                dev_err(dev->dev, "failed to initialize video media entity!\n");
#endif
        dev->vdev.ctrl_handler = &dev->ctrl_handler;

        q = &dev->vidq;
        q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
        q->io_modes = VB2_USERPTR | VB2_MMAP | VB2_DMABUF | VB2_READ;
        q->drv_priv = dev;
        q->buf_struct_size = sizeof(struct cx231xx_buffer);
        q->ops = &cx231xx_video_qops;
        q->mem_ops = &vb2_vmalloc_memops;
        q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
        q->min_queued_buffers = 1;
        q->lock = &dev->lock;
        ret = vb2_queue_init(q);
        if (ret)
                return ret;
        dev->vdev.queue = q;
        dev->vdev.device_caps = V4L2_CAP_READWRITE | V4L2_CAP_STREAMING |
                                V4L2_CAP_VIDEO_CAPTURE;

        switch (dev->model) { /* i2c device tuners */
        case CX231XX_BOARD_HAUPPAUGE_930C_HD_1114xx:
        case CX231XX_BOARD_HAUPPAUGE_935C:
        case CX231XX_BOARD_HAUPPAUGE_955Q:
        case CX231XX_BOARD_HAUPPAUGE_975:
        case CX231XX_BOARD_EVROMEDIA_FULL_HYBRID_FULLHD:
                dev->vdev.device_caps |= V4L2_CAP_TUNER;
                break;
        default:
                if (dev->tuner_type != TUNER_ABSENT)
                        dev->vdev.device_caps |= V4L2_CAP_TUNER;
                break;
        }

        /* register v4l2 video video_device */
        ret = video_register_device(&dev->vdev, VFL_TYPE_VIDEO,
                                    video_nr[dev->devno]);
        if (ret) {
                dev_err(dev->dev,
                        "unable to register video device (error=%i).\n",
                        ret);
                return ret;
        }

        dev_info(dev->dev, "Registered video device %s [v4l2]\n",
                video_device_node_name(&dev->vdev));

        /* Initialize VBI template */
        cx231xx_vbi_template = cx231xx_video_template;
        strscpy(cx231xx_vbi_template.name, "cx231xx-vbi",
                sizeof(cx231xx_vbi_template.name));

        /* Allocate and fill vbi video_device struct */
        cx231xx_vdev_init(dev, &dev->vbi_dev, &cx231xx_vbi_template, "vbi");

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

        q = &dev->vbiq;
        q->type = V4L2_BUF_TYPE_VBI_CAPTURE;
        q->io_modes = VB2_USERPTR | VB2_MMAP | VB2_DMABUF | VB2_READ;
        q->drv_priv = dev;
        q->buf_struct_size = sizeof(struct cx231xx_buffer);
        q->ops = &cx231xx_vbi_qops;
        q->mem_ops = &vb2_vmalloc_memops;
        q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
        q->min_queued_buffers = 1;
        q->lock = &dev->lock;
        ret = vb2_queue_init(q);
        if (ret)
                return ret;
        dev->vbi_dev.queue = q;
        dev->vbi_dev.device_caps = V4L2_CAP_READWRITE | V4L2_CAP_STREAMING |
                                   V4L2_CAP_VBI_CAPTURE;
        switch (dev->model) { /* i2c device tuners */
        case CX231XX_BOARD_HAUPPAUGE_930C_HD_1114xx:
        case CX231XX_BOARD_HAUPPAUGE_935C:
        case CX231XX_BOARD_HAUPPAUGE_955Q:
        case CX231XX_BOARD_HAUPPAUGE_975:
        case CX231XX_BOARD_EVROMEDIA_FULL_HYBRID_FULLHD:
                dev->vbi_dev.device_caps |= V4L2_CAP_TUNER;
                break;
        default:
                if (dev->tuner_type != TUNER_ABSENT)
                        dev->vbi_dev.device_caps |= V4L2_CAP_TUNER;
        }

        /* register v4l2 vbi video_device */
        ret = video_register_device(&dev->vbi_dev, VFL_TYPE_VBI,
                                    vbi_nr[dev->devno]);
        if (ret < 0) {
                dev_err(dev->dev, "unable to register vbi device\n");
                return ret;
        }

        dev_info(dev->dev, "Registered VBI device %s\n",
                video_device_node_name(&dev->vbi_dev));

        if (cx231xx_boards[dev->model].radio.type == CX231XX_RADIO) {
                cx231xx_vdev_init(dev, &dev->radio_dev,
                                &cx231xx_radio_template, "radio");
                dev->radio_dev.ctrl_handler = &dev->radio_ctrl_handler;
                dev->radio_dev.device_caps = V4L2_CAP_RADIO | V4L2_CAP_TUNER;
                ret = video_register_device(&dev->radio_dev, VFL_TYPE_RADIO,
                                            radio_nr[dev->devno]);
                if (ret < 0) {
                        dev_err(dev->dev,
                                "can't register radio device\n");
                        return ret;
                }
                dev_info(dev->dev, "Registered radio device as %s\n",
                        video_device_node_name(&dev->radio_dev));
        }

        return 0;
}