v4l2.c

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/*
 * Copyright (C) 2010 Bluecherry, LLC www.bluecherrydvr.com
 * Copyright (C) 2010 Ben Collins <[email protected]>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/kthread.h>
#include <linux/freezer.h>
#include <media/v4l2-ioctl.h>
#include <media/v4l2-common.h>
#include <media/videobuf-dma-sg.h>
#include "solo6x10.h"
#include "tw28.h"

#define SOLO_HW_BPL     2048
#define SOLO_DISP_PIX_FIELD V4L2_FIELD_INTERLACED

/* Image size is two fields, SOLO_HW_BPL is one horizontal line */
#define solo_vlines(__solo) (__solo->video_vsize * 2)
#define solo_image_size(__solo) (solo_bytesperline(__solo) * \
                 solo_vlines(__solo))
#define solo_bytesperline(__solo) (__solo->video_hsize * 2)

#define MIN_VID_BUFFERS     4

/* Simple file handle */
struct solo_filehandle {
    struct solo_dev     *solo_dev;
    struct videobuf_queue   vidq;
    struct task_struct      *kthread;
    spinlock_t      slock;
    int         old_write;
    struct list_head    vidq_active;
    struct p2m_desc     desc[SOLO_NR_P2M_DESC];
    int         desc_idx;
};

unsigned video_nr = -1;
module_param(video_nr, uint, 0644);
MODULE_PARM_DESC(video_nr, "videoX start number, -1 is autodetect (default)");

static void erase_on(struct solo_dev *solo_dev)
{
    solo_reg_write(solo_dev, SOLO_VO_DISP_ERASE, SOLO_VO_DISP_ERASE_ON);
    solo_dev->erasing = 1;
    solo_dev->frame_blank = 0;
}

static int erase_off(struct solo_dev *solo_dev)
{
    if (!solo_dev->erasing)
        return 0;

    /* First time around, assert erase off */
    if (!solo_dev->frame_blank)
        solo_reg_write(solo_dev, SOLO_VO_DISP_ERASE, 0);
    /* Keep the erasing flag on for 8 frames minimum */
    if (solo_dev->frame_blank++ >= 8)
        solo_dev->erasing = 0;

    return 1;
}

void solo_video_in_isr(struct solo_dev *solo_dev)
{
    solo_reg_write(solo_dev, SOLO_IRQ_STAT, SOLO_IRQ_VIDEO_IN);
    wake_up_interruptible(&solo_dev->disp_thread_wait);
}

static void solo_win_setup(struct solo_dev *solo_dev, u8 ch,
               int sx, int sy, int ex, int ey, int scale)
{
    if (ch >= solo_dev->nr_chans)
        return;

    /* Here, we just keep window/channel the same */
    solo_reg_write(solo_dev, SOLO_VI_WIN_CTRL0(ch),
               SOLO_VI_WIN_CHANNEL(ch) |
               SOLO_VI_WIN_SX(sx) |
               SOLO_VI_WIN_EX(ex) |
               SOLO_VI_WIN_SCALE(scale));

    solo_reg_write(solo_dev, SOLO_VI_WIN_CTRL1(ch),
               SOLO_VI_WIN_SY(sy) |
               SOLO_VI_WIN_EY(ey));
}

static int solo_v4l2_ch_ext_4up(struct solo_dev *solo_dev, u8 idx, int on)
{
    u8 ch = idx * 4;

    if (ch >= solo_dev->nr_chans)
        return -EINVAL;

    if (!on) {
        u8 i;
        for (i = ch; i < ch + 4; i++)
            solo_win_setup(solo_dev, i, solo_dev->video_hsize,
                       solo_vlines(solo_dev),
                       solo_dev->video_hsize,
                       solo_vlines(solo_dev), 0);
        return 0;
    }

    /* Row 1 */
    solo_win_setup(solo_dev, ch, 0, 0, solo_dev->video_hsize / 2,
               solo_vlines(solo_dev) / 2, 3);
    solo_win_setup(solo_dev, ch + 1, solo_dev->video_hsize / 2, 0,
               solo_dev->video_hsize, solo_vlines(solo_dev) / 2, 3);
    /* Row 2 */
    solo_win_setup(solo_dev, ch + 2, 0, solo_vlines(solo_dev) / 2,
               solo_dev->video_hsize / 2, solo_vlines(solo_dev), 3);
    solo_win_setup(solo_dev, ch + 3, solo_dev->video_hsize / 2,
               solo_vlines(solo_dev) / 2, solo_dev->video_hsize,
               solo_vlines(solo_dev), 3);

    return 0;
}

static int solo_v4l2_ch_ext_16up(struct solo_dev *solo_dev, int on)
{
    int sy, ysize, hsize, i;

    if (!on) {
        for (i = 0; i < 16; i++)
            solo_win_setup(solo_dev, i, solo_dev->video_hsize,
                       solo_vlines(solo_dev),
                       solo_dev->video_hsize,
                       solo_vlines(solo_dev), 0);
        return 0;
    }

    ysize = solo_vlines(solo_dev) / 4;
    hsize = solo_dev->video_hsize / 4;

    for (sy = 0, i = 0; i < 4; i++, sy += ysize) {
        solo_win_setup(solo_dev, i * 4, 0, sy, hsize,
                   sy + ysize, 5);
        solo_win_setup(solo_dev, (i * 4) + 1, hsize, sy,
                   hsize * 2, sy + ysize, 5);
        solo_win_setup(solo_dev, (i * 4) + 2, hsize * 2, sy,
                   hsize * 3, sy + ysize, 5);
        solo_win_setup(solo_dev, (i * 4) + 3, hsize * 3, sy,
                   solo_dev->video_hsize, sy + ysize, 5);
    }

    return 0;
}

static int solo_v4l2_ch(struct solo_dev *solo_dev, u8 ch, int on)
{
    u8 ext_ch;

    if (ch < solo_dev->nr_chans) {
        solo_win_setup(solo_dev, ch, on ? 0 : solo_dev->video_hsize,
                   on ? 0 : solo_vlines(solo_dev),
                   solo_dev->video_hsize, solo_vlines(solo_dev),
                   on ? 1 : 0);
        return 0;
    }

    if (ch >= solo_dev->nr_chans + solo_dev->nr_ext)
        return -EINVAL;

    ext_ch = ch - solo_dev->nr_chans;

    /* 4up's first */
    if (ext_ch < 4)
        return solo_v4l2_ch_ext_4up(solo_dev, ext_ch, on);

    /* Remaining case is 16up for 16-port */
    return solo_v4l2_ch_ext_16up(solo_dev, on);
}

static int solo_v4l2_set_ch(struct solo_dev *solo_dev, u8 ch)
{
    if (ch >= solo_dev->nr_chans + solo_dev->nr_ext)
        return -EINVAL;

    erase_on(solo_dev);

    solo_v4l2_ch(solo_dev, solo_dev->cur_disp_ch, 0);
    solo_v4l2_ch(solo_dev, ch, 1);

    solo_dev->cur_disp_ch = ch;

    return 0;
}

static void disp_reset_desc(struct solo_filehandle *fh)
{
    /* We use desc mode, which ignores desc 0 */
    memset(fh->desc, 0, sizeof(*fh->desc));
    fh->desc_idx = 1;
}

static int disp_flush_descs(struct solo_filehandle *fh)
{
    int ret;

    if (!fh->desc_idx)
        return 0;

    ret = solo_p2m_dma_desc(fh->solo_dev, SOLO_P2M_DMA_ID_DISP,
                fh->desc, fh->desc_idx);
    disp_reset_desc(fh);

    return ret;
}

static int disp_push_desc(struct solo_filehandle *fh, dma_addr_t dma_addr,
              u32 ext_addr, int size, int repeat, int ext_size)
{
    if (fh->desc_idx >= SOLO_NR_P2M_DESC) {
        int ret = disp_flush_descs(fh);
        if (ret)
            return ret;
    }

    solo_p2m_push_desc(&fh->desc[fh->desc_idx], 0, dma_addr, ext_addr,
               size, repeat, ext_size);
    fh->desc_idx++;

    return 0;
}

static void solo_fillbuf(struct solo_filehandle *fh,
             struct videobuf_buffer *vb)
{
    struct solo_dev *solo_dev = fh->solo_dev;
    struct videobuf_dmabuf *vbuf;
    unsigned int fdma_addr;
    int error = 1;
    int i;
    struct scatterlist *sg;
    dma_addr_t sg_dma;
    int sg_size_left;

    vbuf = videobuf_to_dma(vb);
    if (!vbuf)
        goto finish_buf;

    if (erase_off(solo_dev)) {
        int i;

        /* Just blit to the entire sg list, ignoring size */
        for_each_sg(vbuf->sglist, sg, vbuf->sglen, i) {
            void *p = sg_virt(sg);
            size_t len = sg_dma_len(sg);

            for (i = 0; i < len; i += 2) {
                ((u8 *)p)[i] = 0x80;
                ((u8 *)p)[i + 1] = 0x00;
            }
        }

        error = 0;
        goto finish_buf;
    }

    disp_reset_desc(fh);
    sg = vbuf->sglist;
    sg_dma = sg_dma_address(sg);
    sg_size_left = sg_dma_len(sg);

    fdma_addr = SOLO_DISP_EXT_ADDR + (fh->old_write *
            (SOLO_HW_BPL * solo_vlines(solo_dev)));

    for (i = 0; i < solo_vlines(solo_dev); i++) {
        int line_len = solo_bytesperline(solo_dev);
        int lines;

        if (!sg_size_left) {
            sg = sg_next(sg);
            if (sg == NULL)
                goto finish_buf;
            sg_dma = sg_dma_address(sg);
            sg_size_left = sg_dma_len(sg);
        }

        /* No room for an entire line, so chunk it up */
        if (sg_size_left < line_len) {
            int this_addr = fdma_addr;

            while (line_len > 0) {
                int this_write;

                if (!sg_size_left) {
                    sg = sg_next(sg);
                    if (sg == NULL)
                        goto finish_buf;
                    sg_dma = sg_dma_address(sg);
                    sg_size_left = sg_dma_len(sg);
                }

                this_write = min(sg_size_left, line_len);

                if (disp_push_desc(fh, sg_dma, this_addr,
                           this_write, 0, 0))
                    goto finish_buf;

                line_len -= this_write;
                sg_size_left -= this_write;
                sg_dma += this_write;
                this_addr += this_write;
            }

            fdma_addr += SOLO_HW_BPL;
            continue;
        }

        /* Shove as many lines into a repeating descriptor as possible */
        lines = min(sg_size_left / line_len,
                solo_vlines(solo_dev) - i);

        if (disp_push_desc(fh, sg_dma, fdma_addr, line_len,
                   lines - 1, SOLO_HW_BPL))
            goto finish_buf;

        i += lines - 1;
        fdma_addr += SOLO_HW_BPL * lines;
        sg_dma += lines * line_len;
        sg_size_left -= lines * line_len;
    }

    error = disp_flush_descs(fh);

finish_buf:
    if (error) {
        vb->state = VIDEOBUF_ERROR;
    } else {
        vb->size = solo_vlines(solo_dev) * solo_bytesperline(solo_dev);
        vb->state = VIDEOBUF_DONE;
        vb->field_count++;
        do_gettimeofday(&vb->ts);
    }

    wake_up(&vb->done);

    return;
}

static void solo_thread_try(struct solo_filehandle *fh)
{
    struct videobuf_buffer *vb;
    unsigned int cur_write;

    for (;;) {
        spin_lock(&fh->slock);

        if (list_empty(&fh->vidq_active))
            break;

        vb = list_first_entry(&fh->vidq_active, struct videobuf_buffer,
                      queue);

        if (!waitqueue_active(&vb->done))
            break;

        cur_write = SOLO_VI_STATUS0_PAGE(solo_reg_read(fh->solo_dev,
                         SOLO_VI_STATUS0));
        if (cur_write == fh->old_write)
            break;

        fh->old_write = cur_write;
        list_del(&vb->queue);

        spin_unlock(&fh->slock);

        solo_fillbuf(fh, vb);
    }

    assert_spin_locked(&fh->slock);
    spin_unlock(&fh->slock);
}

static int solo_thread(void *data)
{
    struct solo_filehandle *fh = data;
    struct solo_dev *solo_dev = fh->solo_dev;
    DECLARE_WAITQUEUE(wait, current);

    set_freezable();
    add_wait_queue(&solo_dev->disp_thread_wait, &wait);

    for (;;) {
        long timeout = schedule_timeout_interruptible(HZ);
        if (timeout == -ERESTARTSYS || kthread_should_stop())
            break;
        solo_thread_try(fh);
        try_to_freeze();
    }

    remove_wait_queue(&solo_dev->disp_thread_wait, &wait);

    return 0;
}

static int solo_start_thread(struct solo_filehandle *fh)
{
    fh->kthread = kthread_run(solo_thread, fh, SOLO6X10_NAME "_disp");

    if (IS_ERR(fh->kthread))
        return PTR_ERR(fh->kthread);

    return 0;
}

static void solo_stop_thread(struct solo_filehandle *fh)
{
    if (fh->kthread) {
        kthread_stop(fh->kthread);
        fh->kthread = NULL;
    }
}

static int solo_buf_setup(struct videobuf_queue *vq, unsigned int *count,
              unsigned int *size)
{
    struct solo_filehandle *fh = vq->priv_data;
    struct solo_dev *solo_dev  = fh->solo_dev;

    *size = solo_image_size(solo_dev);

    if (*count < MIN_VID_BUFFERS)
        *count = MIN_VID_BUFFERS;

    return 0;
}

static int solo_buf_prepare(struct videobuf_queue *vq,
                struct videobuf_buffer *vb, enum v4l2_field field)
{
    struct solo_filehandle *fh  = vq->priv_data;
    struct solo_dev *solo_dev = fh->solo_dev;

    vb->size = solo_image_size(solo_dev);
    if (vb->baddr != 0 && vb->bsize < vb->size)
        return -EINVAL;

    /* XXX: These properties only change when queue is idle */
    vb->width  = solo_dev->video_hsize;
    vb->height = solo_vlines(solo_dev);
    vb->bytesperline = solo_bytesperline(solo_dev);
    vb->field  = field;

    if (vb->state == VIDEOBUF_NEEDS_INIT) {
        int rc = videobuf_iolock(vq, vb, NULL);
        if (rc < 0) {
            struct videobuf_dmabuf *dma = videobuf_to_dma(vb);
            videobuf_dma_unmap(vq->dev, dma);
            videobuf_dma_free(dma);
            vb->state = VIDEOBUF_NEEDS_INIT;
            return rc;
        }
    }
    vb->state = VIDEOBUF_PREPARED;

    return 0;
}

static void solo_buf_queue(struct videobuf_queue *vq,
               struct videobuf_buffer *vb)
{
    struct solo_filehandle *fh = vq->priv_data;
    struct solo_dev *solo_dev = fh->solo_dev;

    vb->state = VIDEOBUF_QUEUED;
    list_add_tail(&vb->queue, &fh->vidq_active);
    wake_up_interruptible(&solo_dev->disp_thread_wait);
}

static void solo_buf_release(struct videobuf_queue *vq,
                 struct videobuf_buffer *vb)
{
    struct videobuf_dmabuf *dma = videobuf_to_dma(vb);

    videobuf_dma_unmap(vq->dev, dma);
    videobuf_dma_free(dma);
    vb->state = VIDEOBUF_NEEDS_INIT;
}

static struct videobuf_queue_ops solo_video_qops = {
    .buf_setup  = solo_buf_setup,
    .buf_prepare    = solo_buf_prepare,
    .buf_queue  = solo_buf_queue,
    .buf_release    = solo_buf_release,
};

static unsigned int solo_v4l2_poll(struct file *file,
                   struct poll_table_struct *wait)
{
    struct solo_filehandle *fh = file->private_data;

    return videobuf_poll_stream(file, &fh->vidq, wait);
}

static int solo_v4l2_mmap(struct file *file, struct vm_area_struct *vma)
{
    struct solo_filehandle *fh = file->private_data;

    return videobuf_mmap_mapper(&fh->vidq, vma);
}

static int solo_v4l2_open(struct file *file)
{
    struct solo_dev *solo_dev = video_drvdata(file);
    struct solo_filehandle *fh;
    int ret;

    fh = kzalloc(sizeof(*fh), GFP_KERNEL);
    if (fh == NULL)
        return -ENOMEM;

    spin_lock_init(&fh->slock);
    INIT_LIST_HEAD(&fh->vidq_active);
    fh->solo_dev = solo_dev;
    file->private_data = fh;

    ret = solo_start_thread(fh);
    if (ret) {
        kfree(fh);
        return ret;
    }

    videobuf_queue_sg_init(&fh->vidq, &solo_video_qops,
                   &solo_dev->pdev->dev, &fh->slock,
                   V4L2_BUF_TYPE_VIDEO_CAPTURE,
                   SOLO_DISP_PIX_FIELD,
                   sizeof(struct videobuf_buffer), fh, NULL);

    return 0;
}

static ssize_t solo_v4l2_read(struct file *file, char __user *data,
                  size_t count, loff_t *ppos)
{
    struct solo_filehandle *fh = file->private_data;

    return videobuf_read_stream(&fh->vidq, data, count, ppos, 0,
                    file->f_flags & O_NONBLOCK);
}

static int solo_v4l2_release(struct file *file)
{
    struct solo_filehandle *fh = file->private_data;

    videobuf_stop(&fh->vidq);
    videobuf_mmap_free(&fh->vidq);
    solo_stop_thread(fh);
    kfree(fh);

    return 0;
}

static int solo_querycap(struct file *file, void  *priv,
             struct v4l2_capability *cap)
{
    struct solo_filehandle  *fh  = priv;
    struct solo_dev *solo_dev = fh->solo_dev;

    strcpy(cap->driver, SOLO6X10_NAME);
    strcpy(cap->card, "Softlogic 6x10");
    snprintf(cap->bus_info, sizeof(cap->bus_info), "PCI %s",
         pci_name(solo_dev->pdev));
    cap->version = SOLO6X10_VER_NUM;
    cap->capabilities =     V4L2_CAP_VIDEO_CAPTURE |
                V4L2_CAP_READWRITE |
                V4L2_CAP_STREAMING;
    return 0;
}

static int solo_enum_ext_input(struct solo_dev *solo_dev,
                   struct v4l2_input *input)
{
    static const char *dispnames_1[] = { "4UP" };
    static const char *dispnames_2[] = { "4UP-1", "4UP-2" };
    static const char *dispnames_5[] = {
        "4UP-1", "4UP-2", "4UP-3", "4UP-4", "16UP"
    };
    const char **dispnames;

    if (input->index >= (solo_dev->nr_chans + solo_dev->nr_ext))
        return -EINVAL;

    if (solo_dev->nr_ext == 5)
        dispnames = dispnames_5;
    else if (solo_dev->nr_ext == 2)
        dispnames = dispnames_2;
    else
        dispnames = dispnames_1;

    snprintf(input->name, sizeof(input->name), "Multi %s",
         dispnames[input->index - solo_dev->nr_chans]);

    return 0;
}

static int solo_enum_input(struct file *file, void *priv,
               struct v4l2_input *input)
{
    struct solo_filehandle *fh  = priv;
    struct solo_dev *solo_dev = fh->solo_dev;

    if (input->index >= solo_dev->nr_chans) {
        int ret = solo_enum_ext_input(solo_dev, input);
        if (ret < 0)
            return ret;
    } else {
        snprintf(input->name, sizeof(input->name), "Camera %d",
             input->index + 1);

        /* We can only check this for normal inputs */
        if (!tw28_get_video_status(solo_dev, input->index))
            input->status = V4L2_IN_ST_NO_SIGNAL;
    }

    input->type = V4L2_INPUT_TYPE_CAMERA;

    if (solo_dev->video_type == SOLO_VO_FMT_TYPE_NTSC)
        input->std = V4L2_STD_NTSC_M;
    else
        input->std = V4L2_STD_PAL_B;

    return 0;
}

static int solo_set_input(struct file *file, void *priv, unsigned int index)
{
    struct solo_filehandle *fh = priv;

    return solo_v4l2_set_ch(fh->solo_dev, index);
}

static int solo_get_input(struct file *file, void *priv, unsigned int *index)
{
    struct solo_filehandle *fh = priv;

    *index = fh->solo_dev->cur_disp_ch;

    return 0;
}

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

    f->pixelformat = V4L2_PIX_FMT_UYVY;
    strlcpy(f->description, "UYUV 4:2:2 Packed", sizeof(f->description));

    return 0;
}

static int solo_try_fmt_cap(struct file *file, void *priv,
                struct v4l2_format *f)
{
    struct solo_filehandle *fh = priv;
    struct solo_dev *solo_dev = fh->solo_dev;
    struct v4l2_pix_format *pix = &f->fmt.pix;
    int image_size = solo_image_size(solo_dev);

    /* Check supported sizes */
    if (pix->width != solo_dev->video_hsize)
        pix->width = solo_dev->video_hsize;
    if (pix->height != solo_vlines(solo_dev))
        pix->height = solo_vlines(solo_dev);
    if (pix->sizeimage != image_size)
        pix->sizeimage = image_size;

    /* Check formats */
    if (pix->field == V4L2_FIELD_ANY)
        pix->field = SOLO_DISP_PIX_FIELD;

    if (pix->pixelformat != V4L2_PIX_FMT_UYVY ||
        pix->field       != SOLO_DISP_PIX_FIELD ||
        pix->colorspace  != V4L2_COLORSPACE_SMPTE170M)
        return -EINVAL;

    return 0;
}

static int solo_set_fmt_cap(struct file *file, void *priv,
                struct v4l2_format *f)
{
    struct solo_filehandle *fh = priv;

    if (videobuf_queue_is_busy(&fh->vidq))
        return -EBUSY;

    /* For right now, if it doesn't match our running config,
     * then fail */
    return solo_try_fmt_cap(file, priv, f);
}

static int solo_get_fmt_cap(struct file *file, void *priv,
                struct v4l2_format *f)
{
    struct solo_filehandle *fh = priv;
    struct solo_dev *solo_dev = fh->solo_dev;
    struct v4l2_pix_format *pix = &f->fmt.pix;

    pix->width = solo_dev->video_hsize;
    pix->height = solo_vlines(solo_dev);
    pix->pixelformat = V4L2_PIX_FMT_UYVY;
    pix->field = SOLO_DISP_PIX_FIELD;
    pix->sizeimage = solo_image_size(solo_dev);
    pix->colorspace = V4L2_COLORSPACE_SMPTE170M;
    pix->bytesperline = solo_bytesperline(solo_dev);

    return 0;
}

static int solo_reqbufs(struct file *file, void *priv,
            struct v4l2_requestbuffers *req)
{
    struct solo_filehandle *fh = priv;

    return videobuf_reqbufs(&fh->vidq, req);
}

static int solo_querybuf(struct file *file, void *priv, struct v4l2_buffer *buf)
{
    struct solo_filehandle *fh = priv;

    return videobuf_querybuf(&fh->vidq, buf);
}

static int solo_qbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
{
    struct solo_filehandle *fh = priv;

    return videobuf_qbuf(&fh->vidq, buf);
}

static int solo_dqbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
{
    struct solo_filehandle *fh = priv;

    return videobuf_dqbuf(&fh->vidq, buf, file->f_flags & O_NONBLOCK);
}

static int solo_streamon(struct file *file, void *priv, enum v4l2_buf_type i)
{
    struct solo_filehandle *fh = priv;

    if (i != V4L2_BUF_TYPE_VIDEO_CAPTURE)
        return -EINVAL;

    return videobuf_streamon(&fh->vidq);
}

static int solo_streamoff(struct file *file, void *priv, enum v4l2_buf_type i)
{
    struct solo_filehandle *fh = priv;

    if (i != V4L2_BUF_TYPE_VIDEO_CAPTURE)
        return -EINVAL;

    return videobuf_streamoff(&fh->vidq);
}

static int solo_s_std(struct file *file, void *priv, v4l2_std_id *i)
{
    return 0;
}

static const u32 solo_motion_ctrls[] = {
    V4L2_CID_MOTION_TRACE,
    0
};

static const u32 *solo_ctrl_classes[] = {
    solo_motion_ctrls,
    NULL
};

static int solo_disp_queryctrl(struct file *file, void *priv,
                   struct v4l2_queryctrl *qc)
{
    qc->id = v4l2_ctrl_next(solo_ctrl_classes, qc->id);
    if (!qc->id)
        return -EINVAL;

    switch (qc->id) {
#ifdef PRIVATE_CIDS
    case V4L2_CID_MOTION_TRACE:
        qc->type = V4L2_CTRL_TYPE_BOOLEAN;
        qc->minimum = 0;
        qc->maximum = qc->step = 1;
        qc->default_value = 0;
        strlcpy(qc->name, "Motion Detection Trace", sizeof(qc->name));
        return 0;
#else
    case V4L2_CID_MOTION_TRACE:
        return v4l2_ctrl_query_fill(qc, 0, 1, 1, 0);
#endif
    }
    return -EINVAL;
}

static int solo_disp_g_ctrl(struct file *file, void *priv,
                struct v4l2_control *ctrl)
{
    struct solo_filehandle *fh = priv;
    struct solo_dev *solo_dev = fh->solo_dev;

    switch (ctrl->id) {
    case V4L2_CID_MOTION_TRACE:
        ctrl->value = solo_reg_read(solo_dev, SOLO_VI_MOTION_BAR)
            ? 1 : 0;
        return 0;
    }
    return -EINVAL;
}

static int solo_disp_s_ctrl(struct file *file, void *priv,
                struct v4l2_control *ctrl)
{
    struct solo_filehandle *fh = priv;
    struct solo_dev *solo_dev = fh->solo_dev;

    switch (ctrl->id) {
    case V4L2_CID_MOTION_TRACE:
        if (ctrl->value) {
            solo_reg_write(solo_dev, SOLO_VI_MOTION_BORDER,
                    SOLO_VI_MOTION_Y_ADD |
                    SOLO_VI_MOTION_Y_VALUE(0x20) |
                    SOLO_VI_MOTION_CB_VALUE(0x10) |
                    SOLO_VI_MOTION_CR_VALUE(0x10));
            solo_reg_write(solo_dev, SOLO_VI_MOTION_BAR,
                    SOLO_VI_MOTION_CR_ADD |
                    SOLO_VI_MOTION_Y_VALUE(0x10) |
                    SOLO_VI_MOTION_CB_VALUE(0x80) |
                    SOLO_VI_MOTION_CR_VALUE(0x10));
        } else {
            solo_reg_write(solo_dev, SOLO_VI_MOTION_BORDER, 0);
            solo_reg_write(solo_dev, SOLO_VI_MOTION_BAR, 0);
        }
        return 0;
    }
    return -EINVAL;
}

static const struct v4l2_file_operations solo_v4l2_fops = {
    .owner          = THIS_MODULE,
    .open           = solo_v4l2_open,
    .release        = solo_v4l2_release,
    .read           = solo_v4l2_read,
    .poll           = solo_v4l2_poll,
    .mmap           = solo_v4l2_mmap,
    .ioctl          = video_ioctl2,
};

static const struct v4l2_ioctl_ops solo_v4l2_ioctl_ops = {
    .vidioc_querycap        = solo_querycap,
    .vidioc_s_std           = solo_s_std,
    /* Input callbacks */
    .vidioc_enum_input      = solo_enum_input,
    .vidioc_s_input         = solo_set_input,
    .vidioc_g_input         = solo_get_input,
    /* Video capture format callbacks */
    .vidioc_enum_fmt_vid_cap    = solo_enum_fmt_cap,
    .vidioc_try_fmt_vid_cap     = solo_try_fmt_cap,
    .vidioc_s_fmt_vid_cap       = solo_set_fmt_cap,
    .vidioc_g_fmt_vid_cap       = solo_get_fmt_cap,
    /* Streaming I/O */
    .vidioc_reqbufs         = solo_reqbufs,
    .vidioc_querybuf        = solo_querybuf,
    .vidioc_qbuf            = solo_qbuf,
    .vidioc_dqbuf           = solo_dqbuf,
    .vidioc_streamon        = solo_streamon,
    .vidioc_streamoff       = solo_streamoff,
    /* Controls */
    .vidioc_queryctrl       = solo_disp_queryctrl,
    .vidioc_g_ctrl          = solo_disp_g_ctrl,
    .vidioc_s_ctrl          = solo_disp_s_ctrl,
};

static struct video_device solo_v4l2_template = {
    .name           = SOLO6X10_NAME,
    .fops           = &solo_v4l2_fops,
    .ioctl_ops      = &solo_v4l2_ioctl_ops,
    .minor          = -1,
    .release        = video_device_release,

    .tvnorms        = V4L2_STD_NTSC_M | V4L2_STD_PAL_B,
    .current_norm       = V4L2_STD_NTSC_M,
};

int solo_v4l2_init(struct solo_dev *solo_dev)
{
    int ret;
    int i;

    init_waitqueue_head(&solo_dev->disp_thread_wait);

    solo_dev->vfd = video_device_alloc();
    if (!solo_dev->vfd)
        return -ENOMEM;

    *solo_dev->vfd = solo_v4l2_template;
    solo_dev->vfd->parent = &solo_dev->pdev->dev;

    ret = video_register_device(solo_dev->vfd, VFL_TYPE_GRABBER, video_nr);
    if (ret < 0) {
        video_device_release(solo_dev->vfd);
        solo_dev->vfd = NULL;
        return ret;
    }

    video_set_drvdata(solo_dev->vfd, solo_dev);

    snprintf(solo_dev->vfd->name, sizeof(solo_dev->vfd->name), "%s (%i)",
         SOLO6X10_NAME, solo_dev->vfd->num);

    if (video_nr != -1)
        video_nr++;

    dev_info(&solo_dev->pdev->dev, "Display as /dev/video%d with "
         "%d inputs (%d extended)\n", solo_dev->vfd->num,
         solo_dev->nr_chans, solo_dev->nr_ext);

    /* Cycle all the channels and clear */
    for (i = 0; i < solo_dev->nr_chans; i++) {
        solo_v4l2_set_ch(solo_dev, i);
        while (erase_off(solo_dev))
            ;/* Do nothing */
    }

    /* Set the default display channel */
    solo_v4l2_set_ch(solo_dev, 0);
    while (erase_off(solo_dev))
        ;/* Do nothing */

    solo_irq_on(solo_dev, SOLO_IRQ_VIDEO_IN);

    return 0;
}

void solo_v4l2_exit(struct solo_dev *solo_dev)
{
    solo_irq_off(solo_dev, SOLO_IRQ_VIDEO_IN);
    if (solo_dev->vfd) {
        video_unregister_device(solo_dev->vfd);
        solo_dev->vfd = NULL;
    }
}