/* Declare static vars that will be used as parameters */
static unsigned int vid_limit = 16; /* Video memory limit, in Mb */
-static struct video_device vivi; /* Video device */
static int video_nr = -1; /* /dev/videoN, -1 for autodetect */
static int n_devs = 1; /* Number of virtual devices */
static int qctl_regs[ARRAY_SIZE(vivi_qctrl)];
-#define dprintk(level, fmt, arg...) \
+#define dprintk(dev, level, fmt, arg...) \
do { \
- if (vivi.debug >= (level)) \
+ if (dev->vfd->debug >= (level)) \
printk(KERN_DEBUG "vivi: " fmt , ## arg); \
} while (0)
struct vivi_dmaqueue {
struct list_head active;
- struct list_head queued;
- struct timer_list timeout;
/* thread for generating video stream*/
struct task_struct *kthread;
struct vivi_dev {
struct list_head vivi_devlist;
- struct mutex lock;
+ spinlock_t slock;
+ struct mutex mutex;
int users;
struct vivi_dmaqueue vidq;
/* Several counters */
- int h, m, s, us, jiffies;
+ int h, m, s, ms;
+ unsigned long jiffies;
char timestr[13];
int mv_count; /* Controls bars movement */
end:
return;
}
+
static void vivi_fillbuff(struct vivi_dev *dev, struct vivi_buffer *buf)
{
int h , pos = 0;
int hmax = buf->vb.height;
int wmax = buf->vb.width;
struct timeval ts;
- char *tmpbuf = kmalloc(wmax * 2, GFP_KERNEL);
+ char *tmpbuf = kmalloc(wmax * 2, GFP_ATOMIC);
void *vbuf = videobuf_to_vmalloc(&buf->vb);
if (!tmpbuf)
return;
+ if (!vbuf)
+ return;
+
for (h = 0; h < hmax; h++) {
gen_line(tmpbuf, 0, wmax, hmax, h, dev->mv_count,
dev->timestr);
- /* FIXME: replacing to __copy_to_user */
- if (copy_to_user(vbuf + pos, tmpbuf, wmax * 2) != 0)
- dprintk(2, "vivifill copy_to_user failed.\n");
+ memcpy(vbuf + pos, tmpbuf, wmax * 2);
pos += wmax*2;
}
/* Updates stream time */
- dev->us += jiffies_to_usecs(jiffies-dev->jiffies);
+ dev->ms += jiffies_to_msecs(jiffies-dev->jiffies);
dev->jiffies = jiffies;
- if (dev->us >= 1000000) {
- dev->us -= 1000000;
+ if (dev->ms >= 1000) {
+ dev->ms -= 1000;
dev->s++;
if (dev->s >= 60) {
dev->s -= 60;
}
}
sprintf(dev->timestr, "%02d:%02d:%02d:%03d",
- dev->h, dev->m, dev->s, (dev->us + 500) / 1000);
+ dev->h, dev->m, dev->s, dev->ms);
- dprintk(2, "vivifill at %s: Buffer 0x%08lx size= %d\n", dev->timestr,
- (unsigned long)tmpbuf, pos);
+ dprintk(dev, 2, "vivifill at %s: Buffer 0x%08lx size= %d\n",
+ dev->timestr, (unsigned long)tmpbuf, pos);
/* Advice that buffer was filled */
- buf->vb.state = VIDEOBUF_DONE;
buf->vb.field_count++;
do_gettimeofday(&ts);
buf->vb.ts = ts;
-
- list_del(&buf->vb.queue);
- wake_up(&buf->vb.done);
+ buf->vb.state = VIDEOBUF_DONE;
}
-static int restart_video_queue(struct vivi_dmaqueue *dma_q);
-
-static void vivi_thread_tick(struct vivi_dmaqueue *dma_q)
+static void vivi_thread_tick(struct vivi_fh *fh)
{
- struct vivi_buffer *buf;
- struct vivi_dev *dev = container_of(dma_q, struct vivi_dev, vidq);
+ struct vivi_buffer *buf;
+ struct vivi_dev *dev = fh->dev;
+ struct vivi_dmaqueue *dma_q = &dev->vidq;
- int bc;
+ unsigned long flags = 0;
- /* Announces videobuf that all went ok */
- for (bc = 0;; bc++) {
- if (list_empty(&dma_q->active)) {
- dprintk(1, "No active queue to serve\n");
- break;
- }
+ dprintk(dev, 1, "Thread tick\n");
- buf = list_entry(dma_q->active.next,
- struct vivi_buffer, vb.queue);
+ spin_lock_irqsave(&dev->slock, flags);
+ if (list_empty(&dma_q->active)) {
+ dprintk(dev, 1, "No active queue to serve\n");
+ goto unlock;
+ }
- /* Nobody is waiting something to be done, just return */
- if (!waitqueue_active(&buf->vb.done)) {
- mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT);
- return;
- }
+ buf = list_entry(dma_q->active.next,
+ struct vivi_buffer, vb.queue);
- do_gettimeofday(&buf->vb.ts);
- dprintk(2, "[%p/%d] wakeup\n", buf, buf->vb. i);
+ /* Nobody is waiting on this buffer, return */
+ if (!waitqueue_active(&buf->vb.done))
+ goto unlock;
- /* Fill buffer */
- vivi_fillbuff(dev, buf);
+ list_del(&buf->vb.queue);
- if (list_empty(&dma_q->active)) {
- del_timer(&dma_q->timeout);
- } else {
- mod_timer(&dma_q->timeout, jiffies + BUFFER_TIMEOUT);
- }
- }
- if (bc != 1)
- dprintk(1, "%s: %d buffers handled (should be 1)\n",
- __FUNCTION__, bc);
+ do_gettimeofday(&buf->vb.ts);
+
+ /* Fill buffer */
+ vivi_fillbuff(dev, buf);
+ dprintk(dev, 1, "filled buffer %p\n", buf);
+
+ wake_up(&buf->vb.done);
+ dprintk(dev, 2, "[%p/%d] wakeup\n", buf, buf->vb. i);
+unlock:
+ spin_unlock_irqrestore(&dev->slock, flags);
+ return;
}
-static void vivi_sleep(struct vivi_dmaqueue *dma_q)
+#define frames_to_ms(frames) \
+ ((frames * WAKE_NUMERATOR * 1000) / WAKE_DENOMINATOR)
+
+static void vivi_sleep(struct vivi_fh *fh)
{
+ struct vivi_dev *dev = fh->dev;
+ struct vivi_dmaqueue *dma_q = &dev->vidq;
int timeout;
DECLARE_WAITQUEUE(wait, current);
- dprintk(1, "%s dma_q=0x%08lx\n", __FUNCTION__, (unsigned long)dma_q);
+ dprintk(dev, 1, "%s dma_q=0x%08lx\n", __func__,
+ (unsigned long)dma_q);
add_wait_queue(&dma_q->wq, &wait);
- if (!kthread_should_stop()) {
- dma_q->frame++;
-
- /* Calculate time to wake up */
- timeout = dma_q->ini_jiffies+
- msecs_to_jiffies((dma_q->frame*WAKE_NUMERATOR * 1000)
- / WAKE_DENOMINATOR) - jiffies;
-
- if (timeout <= 0) {
- int old = dma_q->frame;
- dma_q->frame = (jiffies_to_msecs(jiffies -
- dma_q->ini_jiffies) *
- WAKE_DENOMINATOR) /
- (WAKE_NUMERATOR * 1000) + 1;
-
- timeout = dma_q->ini_jiffies+
- msecs_to_jiffies((dma_q->frame *
- WAKE_NUMERATOR * 1000)
- / WAKE_DENOMINATOR) - jiffies;
-
- dprintk(1, "underrun, losed %d frames. "
- "Now, frame is %d. Waking on %d jiffies\n",
- dma_q->frame-old, dma_q->frame, timeout);
- } else
- dprintk(1, "will sleep for %i jiffies\n", timeout);
-
- vivi_thread_tick(dma_q);
-
- schedule_timeout_interruptible(timeout);
- }
+ if (kthread_should_stop())
+ goto stop_task;
+
+ /* Calculate time to wake up */
+ timeout = msecs_to_jiffies(frames_to_ms(1));
+ vivi_thread_tick(fh);
+
+ schedule_timeout_interruptible(timeout);
+
+stop_task:
remove_wait_queue(&dma_q->wq, &wait);
try_to_freeze();
}
static int vivi_thread(void *data)
{
- struct vivi_dmaqueue *dma_q = data;
+ struct vivi_fh *fh = data;
+ struct vivi_dev *dev = fh->dev;
- dprintk(1, "thread started\n");
+ dprintk(dev, 1, "thread started\n");
- mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT);
set_freezable();
for (;;) {
- vivi_sleep(dma_q);
+ vivi_sleep(fh);
if (kthread_should_stop())
break;
}
- dprintk(1, "thread: exit\n");
+ dprintk(dev, 1, "thread: exit\n");
return 0;
}
-static int vivi_start_thread(struct vivi_dmaqueue *dma_q)
+static int vivi_start_thread(struct vivi_fh *fh)
{
+ struct vivi_dev *dev = fh->dev;
+ struct vivi_dmaqueue *dma_q = &dev->vidq;
+
dma_q->frame = 0;
dma_q->ini_jiffies = jiffies;
- dprintk(1, "%s\n", __FUNCTION__);
+ dprintk(dev, 1, "%s\n", __func__);
- dma_q->kthread = kthread_run(vivi_thread, dma_q, "vivi");
+ dma_q->kthread = kthread_run(vivi_thread, fh, "vivi");
if (IS_ERR(dma_q->kthread)) {
printk(KERN_ERR "vivi: kernel_thread() failed\n");
/* Wakes thread */
wake_up_interruptible(&dma_q->wq);
- dprintk(1, "returning from %s\n", __FUNCTION__);
+ dprintk(dev, 1, "returning from %s\n", __func__);
return 0;
}
static void vivi_stop_thread(struct vivi_dmaqueue *dma_q)
{
- dprintk(1, "%s\n", __FUNCTION__);
+ struct vivi_dev *dev = container_of(dma_q, struct vivi_dev, vidq);
+
+ dprintk(dev, 1, "%s\n", __func__);
/* shutdown control thread */
if (dma_q->kthread) {
kthread_stop(dma_q->kthread);
}
}
-static int restart_video_queue(struct vivi_dmaqueue *dma_q)
-{
- struct vivi_buffer *buf, *prev;
-
- dprintk(1, "%s dma_q=0x%08lx\n", __FUNCTION__, (unsigned long)dma_q);
-
- if (!list_empty(&dma_q->active)) {
- buf = list_entry(dma_q->active.next,
- struct vivi_buffer, vb.queue);
- dprintk(2, "restart_queue [%p/%d]: restart dma\n",
- buf, buf->vb.i);
-
- dprintk(1, "Restarting video dma\n");
- vivi_stop_thread(dma_q);
-
- /* cancel all outstanding capture / vbi requests */
- list_for_each_entry_safe(buf, prev, &dma_q->active, vb.queue) {
- list_del(&buf->vb.queue);
- buf->vb.state = VIDEOBUF_ERROR;
- wake_up(&buf->vb.done);
- }
- mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT);
-
- return 0;
- }
-
- prev = NULL;
- for (;;) {
- if (list_empty(&dma_q->queued))
- return 0;
- buf = list_entry(dma_q->queued.next,
- struct vivi_buffer, vb.queue);
- if (NULL == prev) {
- list_del(&buf->vb.queue);
- list_add_tail(&buf->vb.queue, &dma_q->active);
-
- dprintk(1, "Restarting video dma\n");
- vivi_stop_thread(dma_q);
- vivi_start_thread(dma_q);
-
- buf->vb.state = VIDEOBUF_ACTIVE;
- mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT);
- dprintk(2, "[%p/%d] restart_queue - first active\n",
- buf, buf->vb.i);
-
- } else if (prev->vb.width == buf->vb.width &&
- prev->vb.height == buf->vb.height &&
- prev->fmt == buf->fmt) {
- list_del(&buf->vb.queue);
- list_add_tail(&buf->vb.queue, &dma_q->active);
- buf->vb.state = VIDEOBUF_ACTIVE;
- dprintk(2, "[%p/%d] restart_queue - move to active\n",
- buf, buf->vb.i);
- } else {
- return 0;
- }
- prev = buf;
- }
-}
-
-static void vivi_vid_timeout(unsigned long data)
-{
- struct vivi_dev *dev = (struct vivi_dev *)data;
- struct vivi_dmaqueue *vidq = &dev->vidq;
- struct vivi_buffer *buf;
-
- while (!list_empty(&vidq->active)) {
- buf = list_entry(vidq->active.next,
- struct vivi_buffer, vb.queue);
- list_del(&buf->vb.queue);
- buf->vb.state = VIDEOBUF_ERROR;
- wake_up(&buf->vb.done);
- printk(KERN_INFO "vivi/0: [%p/%d] timeout\n", buf, buf->vb.i);
- }
-
- restart_video_queue(vidq);
-}
-
/* ------------------------------------------------------------------
Videobuf operations
------------------------------------------------------------------*/
static int
buffer_setup(struct videobuf_queue *vq, unsigned int *count, unsigned int *size)
{
- struct vivi_fh *fh = vq->priv_data;
+ struct vivi_fh *fh = vq->priv_data;
+ struct vivi_dev *dev = fh->dev;
*size = fh->width*fh->height*2;
while (*size * *count > vid_limit * 1024 * 1024)
(*count)--;
- dprintk(1, "%s, count=%d, size=%d\n", __FUNCTION__, *count, *size);
+ dprintk(dev, 1, "%s, count=%d, size=%d\n", __func__,
+ *count, *size);
return 0;
}
static void free_buffer(struct videobuf_queue *vq, struct vivi_buffer *buf)
{
- dprintk(1, "%s\n", __FUNCTION__);
+ struct vivi_fh *fh = vq->priv_data;
+ struct vivi_dev *dev = fh->dev;
+
+ dprintk(dev, 1, "%s, state: %i\n", __func__, buf->vb.state);
if (in_interrupt())
BUG();
- videobuf_waiton(&buf->vb, 0, 0);
videobuf_vmalloc_free(&buf->vb);
+ dprintk(dev, 1, "free_buffer: freed\n");
buf->vb.state = VIDEOBUF_NEEDS_INIT;
}
enum v4l2_field field)
{
struct vivi_fh *fh = vq->priv_data;
+ struct vivi_dev *dev = fh->dev;
struct vivi_buffer *buf = container_of(vb, struct vivi_buffer, vb);
- int rc, init_buffer = 0;
+ int rc;
- dprintk(1, "%s, field=%d\n", __FUNCTION__, field);
+ dprintk(dev, 1, "%s, field=%d\n", __func__, field);
BUG_ON(NULL == fh->fmt);
+
if (fh->width < 48 || fh->width > norm_maxw() ||
fh->height < 32 || fh->height > norm_maxh())
return -EINVAL;
+
buf->vb.size = fh->width*fh->height*2;
if (0 != buf->vb.baddr && buf->vb.bsize < buf->vb.size)
return -EINVAL;
- if (buf->fmt != fh->fmt ||
- buf->vb.width != fh->width ||
- buf->vb.height != fh->height ||
- buf->vb.field != field) {
- buf->fmt = fh->fmt;
- buf->vb.width = fh->width;
- buf->vb.height = fh->height;
- buf->vb.field = field;
- init_buffer = 1;
- }
+ /* These properties only change when queue is idle, see s_fmt */
+ buf->fmt = fh->fmt;
+ buf->vb.width = fh->width;
+ buf->vb.height = fh->height;
+ buf->vb.field = field;
if (VIDEOBUF_NEEDS_INIT == buf->vb.state) {
rc = videobuf_iolock(vq, &buf->vb, NULL);
struct vivi_buffer *buf = container_of(vb, struct vivi_buffer, vb);
struct vivi_fh *fh = vq->priv_data;
struct vivi_dev *dev = fh->dev;
- struct vivi_dmaqueue *vidq = &dev->vidq;
- struct vivi_buffer *prev;
-
- if (!list_empty(&vidq->queued)) {
- dprintk(1, "adding vb queue=0x%08lx\n",
- (unsigned long)&buf->vb.queue);
- list_add_tail(&buf->vb.queue, &vidq->queued);
- buf->vb.state = VIDEOBUF_QUEUED;
- dprintk(2, "[%p/%d] buffer_queue - append to queued\n",
- buf, buf->vb.i);
- } else if (list_empty(&vidq->active)) {
- list_add_tail(&buf->vb.queue, &vidq->active);
-
- buf->vb.state = VIDEOBUF_ACTIVE;
- mod_timer(&vidq->timeout, jiffies+BUFFER_TIMEOUT);
- dprintk(2, "[%p/%d] buffer_queue - first active\n",
- buf, buf->vb.i);
-
- vivi_start_thread(vidq);
- } else {
- prev = list_entry(vidq->active.prev,
- struct vivi_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, &vidq->active);
- buf->vb.state = VIDEOBUF_ACTIVE;
- dprintk(2, "[%p/%d] buffer_queue - append to active\n",
- buf, buf->vb.i);
-
- } else {
- list_add_tail(&buf->vb.queue, &vidq->queued);
- buf->vb.state = VIDEOBUF_QUEUED;
- dprintk(2, "[%p/%d] buffer_queue - first queued\n",
- buf, buf->vb.i);
- }
- }
+ struct vivi_dmaqueue *vidq = &dev->vidq;
+
+ dprintk(dev, 1, "%s\n", __func__);
+
+ buf->vb.state = VIDEOBUF_QUEUED;
+ list_add_tail(&buf->vb.queue, &vidq->active);
}
static void buffer_release(struct videobuf_queue *vq,
struct vivi_buffer *buf = container_of(vb, struct vivi_buffer, vb);
struct vivi_fh *fh = vq->priv_data;
struct vivi_dev *dev = (struct vivi_dev *)fh->dev;
- struct vivi_dmaqueue *vidq = &dev->vidq;
- dprintk(1, "%s\n", __FUNCTION__);
-
- vivi_stop_thread(vidq);
+ dprintk(dev, 1, "%s\n", __func__);
free_buffer(vq, buf);
}
static int vidioc_try_fmt_cap(struct file *file, void *priv,
struct v4l2_format *f)
{
+ struct vivi_fh *fh = priv;
+ struct vivi_dev *dev = fh->dev;
struct vivi_fmt *fmt;
enum v4l2_field field;
unsigned int maxw, maxh;
if (format.fourcc != f->fmt.pix.pixelformat) {
- dprintk(1, "Fourcc format (0x%08x) invalid. Driver accepts "
- "only 0x%08x\n", f->fmt.pix.pixelformat, format.fourcc);
+ dprintk(dev, 1, "Fourcc format (0x%08x) invalid. "
+ "Driver accepts only 0x%08x\n",
+ f->fmt.pix.pixelformat, format.fourcc);
return -EINVAL;
}
fmt = &format;
if (field == V4L2_FIELD_ANY) {
field = V4L2_FIELD_INTERLACED;
} else if (V4L2_FIELD_INTERLACED != field) {
- dprintk(1, "Field type invalid.\n");
+ dprintk(dev, 1, "Field type invalid.\n");
return -EINVAL;
}
struct v4l2_format *f)
{
struct vivi_fh *fh = priv;
+ struct videobuf_queue *q = &fh->vb_vidq;
+
int ret = vidioc_try_fmt_cap(file, fh, f);
if (ret < 0)
return (ret);
+ mutex_lock(&q->vb_lock);
+
+ if (videobuf_queue_is_busy(&fh->vb_vidq)) {
+ dprintk(fh->dev, 1, "%s queue busy\n", __func__);
+ ret = -EBUSY;
+ goto out;
+ }
+
fh->fmt = &format;
fh->width = f->fmt.pix.width;
fh->height = f->fmt.pix.height;
fh->vb_vidq.field = f->fmt.pix.field;
fh->type = f->type;
- return (0);
+ ret = 0;
+out:
+ mutex_unlock(&q->vb_lock);
+
+ return (ret);
}
static int vidioc_reqbufs(struct file *file, void *priv,
struct vivi_dev *dev;
struct vivi_fh *fh;
int i;
+ int retval = 0;
printk(KERN_DEBUG "vivi: open called (minor=%d)\n", minor);
return -ENODEV;
found:
- /* If more than one user, mutex should be added */
+ mutex_lock(&dev->mutex);
dev->users++;
- dprintk(1, "open minor=%d type=%s users=%d\n", minor,
+ if (dev->users > 1) {
+ dev->users--;
+ retval = -EBUSY;
+ goto unlock;
+ }
+
+ dprintk(dev, 1, "open minor=%d type=%s users=%d\n", minor,
v4l2_type_names[V4L2_BUF_TYPE_VIDEO_CAPTURE], dev->users);
/* allocate + initialize per filehandle data */
fh = kzalloc(sizeof(*fh), GFP_KERNEL);
if (NULL == fh) {
dev->users--;
- return -ENOMEM;
+ retval = -ENOMEM;
+ goto unlock;
}
+unlock:
+ mutex_unlock(&dev->mutex);
+ if (retval)
+ return retval;
file->private_data = fh;
fh->dev = dev;
dev->h = 0;
dev->m = 0;
dev->s = 0;
- dev->us = 0;
+ dev->ms = 0;
dev->mv_count = 0;
dev->jiffies = jiffies;
sprintf(dev->timestr, "%02d:%02d:%02d:%03d",
- dev->h, dev->m, dev->s, (dev->us + 500) / 1000);
+ dev->h, dev->m, dev->s, dev->ms);
videobuf_queue_vmalloc_init(&fh->vb_vidq, &vivi_video_qops,
- NULL, NULL, fh->type, V4L2_FIELD_INTERLACED,
+ NULL, &dev->slock, fh->type, V4L2_FIELD_INTERLACED,
sizeof(struct vivi_buffer), fh);
+ vivi_start_thread(fh);
+
return 0;
}
vivi_poll(struct file *file, struct poll_table_struct *wait)
{
struct vivi_fh *fh = file->private_data;
+ struct vivi_dev *dev = fh->dev;
struct videobuf_queue *q = &fh->vb_vidq;
- dprintk(1, "%s\n", __FUNCTION__);
+ dprintk(dev, 1, "%s\n", __func__);
if (V4L2_BUF_TYPE_VIDEO_CAPTURE != fh->type)
return POLLERR;
kfree(fh);
+ mutex_lock(&dev->mutex);
dev->users--;
+ mutex_unlock(&dev->mutex);
- dprintk(1, "close called (minor=%d, users=%d)\n", minor, dev->users);
+ dprintk(dev, 1, "close called (minor=%d, users=%d)\n",
+ minor, dev->users);
return 0;
}
static int vivi_mmap(struct file *file, struct vm_area_struct *vma)
{
- struct vivi_fh *fh = file->private_data;
+ struct vivi_fh *fh = file->private_data;
+ struct vivi_dev *dev = fh->dev;
int ret;
- dprintk(1, "mmap called, vma=0x%08lx\n", (unsigned long)vma);
+ dprintk(dev, 1, "mmap called, vma=0x%08lx\n", (unsigned long)vma);
ret = videobuf_mmap_mapper(&fh->vb_vidq, vma);
- dprintk(1, "vma start=0x%08lx, size=%ld, ret=%d\n",
+ dprintk(dev, 1, "vma start=0x%08lx, size=%ld, ret=%d\n",
(unsigned long)vma->vm_start,
(unsigned long)vma->vm_end-(unsigned long)vma->vm_start,
ret);
.read = vivi_read,
.poll = vivi_poll,
.ioctl = video_ioctl2, /* V4L2 ioctl handler */
+ .compat_ioctl = v4l_compat_ioctl32,
.mmap = vivi_mmap,
.llseek = no_llseek,
};
/* init video dma queues */
INIT_LIST_HEAD(&dev->vidq.active);
- INIT_LIST_HEAD(&dev->vidq.queued);
init_waitqueue_head(&dev->vidq.wq);
/* initialize locks */
- mutex_init(&dev->lock);
-
- dev->vidq.timeout.function = vivi_vid_timeout;
- dev->vidq.timeout.data = (unsigned long)dev;
- init_timer(&dev->vidq.timeout);
+ spin_lock_init(&dev->slock);
+ mutex_init(&dev->mutex);
vfd = video_device_alloc();
if (NULL == vfd)
projects / linux-2.6-omap-h63xx.git / blobdiff