/*
* 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_CH01];
/* 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_CH01]);
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_CH01] && h->video_dev[SRAM_CH01]->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_CH01;
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_VIDEO1))
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_VIDEO1)) {
/* 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_CH01] )
{
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(channel1->dma_ctl, 0); /* FIFO and RISC disable */
/* stop video capture */
if (res_check(fh, RESOURCE_VIDEO1)) {
videobuf_queue_cancel(&fh->vidq);
res_free(dev, fh, RESOURCE_VIDEO1);
}
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_VIDEO1))))
{
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_VIDEO1);
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_CH01, pix_format );
// check if cif resolution
if (fh->width == 320 || fh->width == 352)
{
dev->use_cif_resolution[SRAM_CH01] = 1;
}else
{
dev->use_cif_resolution[SRAM_CH01] = 0;
}
dev->cif_width[SRAM_CH01] = fh->width;
medusa_set_resolution( dev, fh->width, SRAM_CH01 );
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_CH01].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_CH01];
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 1 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_CH01);
}
//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_template1 = {
.name = "cx25821-video",
.fops = &video_fops,
.minor = -1,
.ioctl_ops = &video_ioctl_ops,
.tvnorms = CX25821_NORMS,
.current_norm = V4L2_STD_NTSC_M,
};
