path: root/drivers/staging/cx25821/cx25821-video5.c

/*
 *  Driver for the Conexant CX25821 PCIe bridge
 *
 *  Copyright (C) 2009 Conexant Systems Inc. 
 *  Authors  <shu.lin@conexant.com>, <hiep.huynh@conexant.com>
 *  Based on Steven Toth <stoth@linuxtv.org> cx23885 driver
 *
 *  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., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include "cx25821-video.h"


static void buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
{
    struct cx25821_buffer   *buf = container_of(vb, struct cx25821_buffer, vb);
    struct cx25821_buffer   *prev;
    struct cx25821_fh       *fh   = vq->priv_data;
    struct cx25821_dev      *dev  = fh->dev;
    struct cx25821_dmaqueue *q    = &dev->vidq[SRAM_CH05];

    /* add jump to stopper */
    buf->risc.jmp[0] = cpu_to_le32(RISC_JUMP | RISC_IRQ1 | RISC_CNT_INC);
    buf->risc.jmp[1] = cpu_to_le32(q->stopper.dma);
    buf->risc.jmp[2] = cpu_to_le32(0); /* bits 63-32 */

    dprintk(2, "jmp to stopper (0x%x)\n", buf->risc.jmp[1]);

    if (!list_empty(&q->queued)) {
        list_add_tail(&buf->vb.queue, &q->queued);
        buf->vb.state = VIDEOBUF_QUEUED;
        dprintk(2, "[%p/%d] buffer_queue - append to queued\n", buf, buf->vb.i);

    } else if (list_empty(&q->active)) {
        list_add_tail(&buf->vb.queue, &q->active);
        cx25821_start_video_dma(dev, q, buf, &dev->sram_channels[SRAM_CH05]);
        buf->vb.state = VIDEOBUF_ACTIVE;
        buf->count    = q->count++;
        mod_timer(&q->timeout, jiffies+BUFFER_TIMEOUT);
        dprintk(2, "[%p/%d] buffer_queue - first active, buf cnt = %d, q->count = %d\n",
                                buf, buf->vb. i, buf->count, q->count);
    } else {
        prev = list_entry(q->active.prev, struct cx25821_buffer, vb.queue);
        if (prev->vb.width  == buf->vb.width  &&
            prev->vb.height == buf->vb.height &&
            prev->fmt       == buf->fmt) {
            list_add_tail(&buf->vb.queue, &q->active);
            buf->vb.state = VIDEOBUF_ACTIVE;
            buf->count    = q->count++;
            prev->risc.jmp[1] = cpu_to_le32(buf->risc.dma);

            /* 64 bit bits 63-32 */
            prev->risc.jmp[2] = cpu_to_le32(0);
            dprintk(2, "[%p/%d] buffer_queue - append to active, buf->count=%d\n",  buf, buf->vb.i, buf->count);

        } else {
            list_add_tail(&buf->vb.queue, &q->queued);
            buf->vb.state = VIDEOBUF_QUEUED;
            dprintk(2, "[%p/%d] buffer_queue - first queued\n", buf, buf->vb.i);
        }
    }

    if (list_empty(&q->active))
    {
       dprintk(2, "active queue empty!\n");
    }
}


static struct videobuf_queue_ops cx25821_video_qops = {
    .buf_setup    = buffer_setup,
    .buf_prepare  = buffer_prepare,
    .buf_queue    = buffer_queue,
    .buf_release  = buffer_release,
};


static int video_open(struct file *file)
{
    int minor = video_devdata(file)->minor;
    struct cx25821_dev *h, *dev = NULL;
    struct cx25821_fh *fh;
    struct list_head *list;
    enum v4l2_buf_type type = 0;
    u32 pix_format;

    lock_kernel();
    list_for_each(list, &cx25821_devlist)
    {
        h = list_entry(list, struct cx25821_dev, devlist);

        if (h->video_dev[SRAM_CH05] && h->video_dev[SRAM_CH05]->minor == minor) {
            dev  = h;
            type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
        }
    }

    if (NULL == dev) {
        unlock_kernel();
        return -ENODEV;
    }

    printk("open minor=%d type=%s\n", minor, v4l2_type_names[type]);

    /* allocate + initialize per filehandle data */
    fh = kzalloc(sizeof(*fh), GFP_KERNEL);
    if (NULL == fh) {
        unlock_kernel();
        return -ENOMEM;
    }
    file->private_data = fh;
    fh->dev      = dev;
    fh->type     = type;
    fh->width    = 720;

    if(dev->tvnorm & V4L2_STD_PAL_BG || dev->tvnorm & V4L2_STD_PAL_DK)
        fh->height = 576;
    else
        fh->height = 480;

    dev->channel_opened = SRAM_CH05;
    pix_format          = (dev->pixel_formats[dev->channel_opened] == PIXEL_FRMT_411) ? V4L2_PIX_FMT_Y41P : V4L2_PIX_FMT_YUYV;
    fh->fmt             = format_by_fourcc(pix_format);

    v4l2_prio_open(&dev->prio,&fh->prio);

    videobuf_queue_sg_init(&fh->vidq, &cx25821_video_qops,
                &dev->pci->dev, &dev->slock,
                V4L2_BUF_TYPE_VIDEO_CAPTURE,
                V4L2_FIELD_INTERLACED,
                sizeof(struct cx25821_buffer),
                fh);

    dprintk(1, "post videobuf_queue_init()\n");
    unlock_kernel();

    return 0;
}

static ssize_t video_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
{
    struct cx25821_fh *fh = file->private_data;

    switch (fh->type)
    {
        case V4L2_BUF_TYPE_VIDEO_CAPTURE:
            if (res_locked(fh->dev, RESOURCE_VIDEO5))
                return -EBUSY;

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

        default:
            BUG();
            return 0;
    }
}

static unsigned int video_poll(struct file *file, struct poll_table_struct *wait)
{
    struct cx25821_fh *fh = file->private_data;
    struct cx25821_buffer *buf;

    if (res_check(fh, RESOURCE_VIDEO5)) {
        /* streaming capture */
        if (list_empty(&fh->vidq.stream))
            return POLLERR;
        buf = list_entry(fh->vidq.stream.next,
            struct cx25821_buffer, vb.stream);
    } else {
        /* read() capture */
        buf = (struct cx25821_buffer *)fh->vidq.read_buf;
        if (NULL == buf)
            return POLLERR;
    }

    poll_wait(file, &buf->vb.done, wait);
    if (buf->vb.state == VIDEOBUF_DONE || buf->vb.state == VIDEOBUF_ERROR)
    {        
        if( buf->vb.state == VIDEOBUF_DONE )
        {            
            struct cx25821_dev *dev = fh->dev;
            
            if( dev && dev->use_cif_resolution[SRAM_CH05] )
            {
                u8 cam_id = *((char*)buf->vb.baddr+3); 
                memcpy((char*)buf->vb.baddr, (char*)buf->vb.baddr + (fh->width * 2), (fh->width * 2));                      
                *((char*)buf->vb.baddr+3) = cam_id;
            }
        }
        
        return POLLIN|POLLRDNORM;
    }

    return 0;
}


static int video_release(struct file *file)
{
    struct cx25821_fh *fh = file->private_data;
    struct cx25821_dev *dev = fh->dev;

    //stop the risc engine and fifo
    cx_write(channel5->dma_ctl, 0); /* FIFO and RISC disable */

    /* stop video capture */
    if (res_check(fh, RESOURCE_VIDEO5)) {
        videobuf_queue_cancel(&fh->vidq);
        res_free(dev, fh, RESOURCE_VIDEO5);
    }

    if (fh->vidq.read_buf) {
        buffer_release(&fh->vidq, fh->vidq.read_buf);
        kfree(fh->vidq.read_buf);
    }

    videobuf_mmap_free(&fh->vidq);

    v4l2_prio_close(&dev->prio,&fh->prio);
    file->private_data = NULL;
    kfree(fh);

    return 0;
}


static int vidioc_streamon(struct file *file, void *priv, enum v4l2_buf_type i)
{
    struct cx25821_fh *fh = priv;
    struct cx25821_dev *dev = fh->dev;

    if (unlikely(fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE))
    {
        return -EINVAL;
    }

    if (unlikely(i != fh->type))
    {
        return -EINVAL;
    }

    if (unlikely(!res_get(dev, fh, get_resource(fh, RESOURCE_VIDEO5))))
    {
        return -EBUSY;
    }

    return videobuf_streamon(get_queue(fh));
}

static int vidioc_streamoff(struct file *file, void *priv, enum v4l2_buf_type i)
{
    struct cx25821_fh *fh = priv;
    struct cx25821_dev *dev = fh->dev;
    int err, res;

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

    res = get_resource(fh, RESOURCE_VIDEO5);
    err = videobuf_streamoff(get_queue(fh));
    if (err < 0)
        return err;
    res_free(dev, fh, res);
    return 0;
}


static int vidioc_s_fmt_vid_cap(struct file *file, void *priv, struct v4l2_format *f)
{
    struct cx25821_fh *fh = priv;
    struct cx25821_dev *dev  = ((struct cx25821_fh *)priv)->dev;
    int err;    
    int pix_format = 0;
   
    if (fh) 
    {
        err = v4l2_prio_check(&dev->prio, &fh->prio);
        if (0 != err)
            return err;
    }

    dprintk(2, "%s()\n", __func__);
    err = vidioc_try_fmt_vid_cap(file, priv, f);

    if (0 != err)
        return err;

    fh->fmt        = format_by_fourcc(f->fmt.pix.pixelformat);
    fh->vidq.field = f->fmt.pix.field;

    // check if width and height is valid based on set standard
    if (is_valid_width(f->fmt.pix.width, dev->tvnorm))
    {
        fh->width      = f->fmt.pix.width;
    }

    if (is_valid_height(f->fmt.pix.height, dev->tvnorm))
    {
        fh->height     = f->fmt.pix.height;
    }

    if (f->fmt.pix.pixelformat == V4L2_PIX_FMT_Y41P)
        pix_format = PIXEL_FRMT_411;
    else if (f->fmt.pix.pixelformat == V4L2_PIX_FMT_YUYV)
        pix_format = PIXEL_FRMT_422;
    else
        return -EINVAL;

    cx25821_set_pixel_format( dev, SRAM_CH05, pix_format ); 
 
    // check if cif resolution
    if (fh->width == 320 || fh->width == 352)
    {
        dev->use_cif_resolution[SRAM_CH05] = 1;
    }else
    {
	dev->use_cif_resolution[SRAM_CH05] = 0;
    }
    dev->cif_width[SRAM_CH05]          = fh->width;
    medusa_set_resolution( dev, fh->width, SRAM_CH05 ); 

    dprintk(2, "%s() width=%d height=%d field=%d\n", __func__, fh->width, fh->height, fh->vidq.field);
    cx25821_call_all(dev, video, s_fmt, f);

    return 0;
}

static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *p)
{
    int ret_val = 0;
    struct cx25821_fh *fh = priv;
    struct cx25821_dev *dev  = ((struct cx25821_fh *)priv)->dev;

    ret_val = videobuf_dqbuf(get_queue(fh), p, file->f_flags & O_NONBLOCK); 

    p->sequence = dev->vidq[SRAM_CH05].count;

    return ret_val;
}
static int vidioc_log_status (struct file *file, void *priv)
{
    struct cx25821_dev *dev  = ((struct cx25821_fh *)priv)->dev;
    char name[32 + 2];

    struct sram_channel *sram_ch = &dev->sram_channels[SRAM_CH05];  
    u32 tmp = 0;

    snprintf(name, sizeof(name), "%s/2", dev->name);
    printk(KERN_INFO "%s/2: ============  START LOG STATUS  ============\n",
	       dev->name);
    cx25821_call_all(dev, core, log_status);
    
    tmp = cx_read(sram_ch->dma_ctl);
    printk(KERN_INFO "Video input 5 is %s\n", (tmp & 0x11)?"streaming" : "stopped");
    printk(KERN_INFO "%s/2: =============  END LOG STATUS  =============\n",
	       dev->name);
    return 0;
}

static int vidioc_s_ctrl(struct file *file, void *priv,
				struct v4l2_control *ctl)
{
	struct cx25821_fh *fh = priv;
        struct cx25821_dev *dev = ((struct cx25821_fh *)priv)->dev;
        int err;

        if (fh) {
		err = v4l2_prio_check(&dev->prio, &fh->prio);
		if (0 != err)
			return err;
	}

	return cx25821_set_control(dev, ctl, SRAM_CH05);
}

// exported stuff
static const struct v4l2_file_operations video_fops = {
    .owner         = THIS_MODULE,
    .open          = video_open,
    .release       = video_release,
    .read          = video_read,
    .poll          = video_poll,
    .mmap          = video_mmap,
    .ioctl         = video_ioctl2,
};

static const struct v4l2_ioctl_ops video_ioctl_ops = {
    .vidioc_querycap      = vidioc_querycap,
    .vidioc_enum_fmt_vid_cap  = vidioc_enum_fmt_vid_cap,
    .vidioc_g_fmt_vid_cap     = vidioc_g_fmt_vid_cap,
    .vidioc_try_fmt_vid_cap   = vidioc_try_fmt_vid_cap,
    .vidioc_s_fmt_vid_cap     = vidioc_s_fmt_vid_cap,
    .vidioc_reqbufs       = vidioc_reqbufs,
    .vidioc_querybuf      = vidioc_querybuf,
    .vidioc_qbuf          = vidioc_qbuf,
    .vidioc_dqbuf         = vidioc_dqbuf,
#ifdef TUNER_FLAG
    .vidioc_s_std         = vidioc_s_std,
    .vidioc_querystd      = vidioc_querystd,
#endif
    .vidioc_cropcap       = vidioc_cropcap,
    .vidioc_s_crop        = vidioc_s_crop,
    .vidioc_g_crop        = vidioc_g_crop,
    .vidioc_enum_input    = vidioc_enum_input,
    .vidioc_g_input       = vidioc_g_input,
    .vidioc_s_input       = vidioc_s_input,
    .vidioc_g_ctrl        = vidioc_g_ctrl,
    .vidioc_s_ctrl        = vidioc_s_ctrl,
    .vidioc_queryctrl	  = vidioc_queryctrl,
    .vidioc_streamon      = vidioc_streamon,
    .vidioc_streamoff     = vidioc_streamoff,
    .vidioc_log_status    = vidioc_log_status,
    .vidioc_g_priority	  = vidioc_g_priority,
    .vidioc_s_priority	  = vidioc_s_priority,
#ifdef CONFIG_VIDEO_V4L1_COMPAT
    .vidiocgmbuf          = vidiocgmbuf,
#endif
#ifdef TUNER_FLAG
    .vidioc_g_tuner       = vidioc_g_tuner,
    .vidioc_s_tuner       = vidioc_s_tuner,
    .vidioc_g_frequency   = vidioc_g_frequency,
    .vidioc_s_frequency   = vidioc_s_frequency,
#endif
#ifdef CONFIG_VIDEO_ADV_DEBUG
    .vidioc_g_register    = vidioc_g_register,
    .vidioc_s_register    = vidioc_s_register,
#endif
};

struct video_device cx25821_video_template5 = {
    .name                 = "cx25821-video",
    .fops                 = &video_fops,
    .minor                = -1,
    .ioctl_ops            = &video_ioctl_ops,
    .tvnorms              = CX25821_NORMS,
    .current_norm         = V4L2_STD_NTSC_M,
};