From be178cb4f41f70e29108ce4eb5a8a77a62f1922f Mon Sep 17 00:00:00 2001 From: Hans Verkuil Date: Sun, 14 Apr 2013 11:53:35 -0300 Subject: [media] cx25821: use core locking This allows us to replace .ioctl with .unlocked_ioctl. Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab --- drivers/media/pci/cx25821/cx25821-video.c | 72 ++++++++++++------------------- 1 file changed, 27 insertions(+), 45 deletions(-) (limited to 'drivers/media/pci/cx25821/cx25821-video.c') diff --git a/drivers/media/pci/cx25821/cx25821-video.c b/drivers/media/pci/cx25821/cx25821-video.c index 6088ee996b92..ab79bd5e5f68 100644 --- a/drivers/media/pci/cx25821/cx25821-video.c +++ b/drivers/media/pci/cx25821/cx25821-video.c @@ -144,27 +144,8 @@ static int cx25821_set_tvnorm(struct cx25821_dev *dev, v4l2_std_id norm) return 0; } -/* -static int cx25821_ctrl_query(struct v4l2_queryctrl *qctrl) -{ - int i; - - if (qctrl->id < V4L2_CID_BASE || qctrl->id >= V4L2_CID_LASTP1) - return -EINVAL; - for (i = 0; i < CX25821_CTLS; i++) - if (cx25821_ctls[i].v.id == qctrl->id) - break; - if (i == CX25821_CTLS) { - *qctrl = no_ctl; - return 0; - } - *qctrl = cx25821_ctls[i].v; - return 0; -} -*/ - /* resource management */ -int cx25821_res_get(struct cx25821_dev *dev, struct cx25821_fh *fh, +static int cx25821_res_get(struct cx25821_dev *dev, struct cx25821_fh *fh, unsigned int bit) { dprintk(1, "%s()\n", __func__); @@ -173,41 +154,36 @@ int cx25821_res_get(struct cx25821_dev *dev, struct cx25821_fh *fh, return 1; /* is it free? */ - mutex_lock(&dev->lock); if (dev->channels[fh->channel_id].resources & bit) { /* no, someone else uses it */ - mutex_unlock(&dev->lock); return 0; } /* it's free, grab it */ fh->resources |= bit; dev->channels[fh->channel_id].resources |= bit; dprintk(1, "res: get %d\n", bit); - mutex_unlock(&dev->lock); return 1; } -int cx25821_res_check(struct cx25821_fh *fh, unsigned int bit) +static int cx25821_res_check(struct cx25821_fh *fh, unsigned int bit) { return fh->resources & bit; } -int cx25821_res_locked(struct cx25821_fh *fh, unsigned int bit) +static int cx25821_res_locked(struct cx25821_fh *fh, unsigned int bit) { return fh->dev->channels[fh->channel_id].resources & bit; } -void cx25821_res_free(struct cx25821_dev *dev, struct cx25821_fh *fh, +static void cx25821_res_free(struct cx25821_dev *dev, struct cx25821_fh *fh, unsigned int bits) { BUG_ON((fh->resources & bits) != bits); dprintk(1, "%s()\n", __func__); - mutex_lock(&dev->lock); fh->resources &= ~bits; dev->channels[fh->channel_id].resources &= ~bits; dprintk(1, "res: put %d\n", bits); - mutex_unlock(&dev->lock); } static int cx25821_video_mux(struct cx25821_dev *dev, unsigned int input) @@ -669,7 +645,7 @@ static int video_open(struct file *file) 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, NULL); + fh, &dev->lock); dprintk(1, "post videobuf_queue_init()\n"); @@ -680,19 +656,25 @@ static ssize_t video_read(struct file *file, char __user * data, size_t count, loff_t *ppos) { struct cx25821_fh *fh = file->private_data; + struct cx25821_dev *dev = fh->dev; + int err; switch (fh->type) { case V4L2_BUF_TYPE_VIDEO_CAPTURE: + if (mutex_lock_interruptible(&dev->lock)) + return -ERESTARTSYS; if (cx25821_res_locked(fh, RESOURCE_VIDEO0)) - return -EBUSY; - - return videobuf_read_one(&fh->vidq, data, count, ppos, + err = -EBUSY; + else + err = videobuf_read_one(&fh->vidq, data, count, ppos, file->f_flags & O_NONBLOCK); + mutex_unlock(&dev->lock); + return err; default: - BUG(); - return 0; + return -ENODEV; } + } static unsigned int video_poll(struct file *file, @@ -742,6 +724,7 @@ static int video_release(struct file *file) const struct sram_channel *sram_ch = dev->channels[0].sram_channels; + mutex_lock(&dev->lock); /* stop the risc engine and fifo */ cx_write(sram_ch->dma_ctl, 0); /* FIFO and RISC disable */ @@ -750,6 +733,7 @@ static int video_release(struct file *file) videobuf_queue_cancel(&fh->vidq); cx25821_res_free(dev, fh, RESOURCE_VIDEO0); } + mutex_unlock(&dev->lock); if (fh->vidq.read_buf) { cx25821_buffer_release(&fh->vidq, fh->vidq.read_buf); @@ -1083,9 +1067,7 @@ int cx25821_vidioc_s_std(struct file *file, void *priv, v4l2_std_id tvnorms) if (dev->tvnorm == tvnorms) return 0; - mutex_lock(&dev->lock); cx25821_set_tvnorm(dev, tvnorms); - mutex_unlock(&dev->lock); medusa_set_videostandard(dev); @@ -1141,9 +1123,7 @@ static int cx25821_vidioc_s_input(struct file *file, void *priv, unsigned int i) if (i >= CX25821_NR_INPUT || INPUT(i)->type == 0) return -EINVAL; - mutex_lock(&dev->lock); cx25821_video_mux(dev, i); - mutex_unlock(&dev->lock); return 0; } @@ -1465,7 +1445,7 @@ static const struct v4l2_file_operations video_fops = { .read = video_read, .poll = video_poll, .mmap = cx25821_video_mmap, - .ioctl = cx25821_video_ioctl, + .unlocked_ioctl = cx25821_video_ioctl, }; static const struct v4l2_ioctl_ops video_ioctl_ops = { @@ -1521,6 +1501,10 @@ int cx25821_video_register(struct cx25821_dev *dev) int err; int i; + /* initial device configuration */ + dev->tvnorm = V4L2_STD_NTSC_M, + cx25821_set_tvnorm(dev, dev->tvnorm); + spin_lock_init(&dev->slock); for (i = 0; i < VID_CHANNEL_NUM; ++i) { @@ -1543,6 +1527,9 @@ int cx25821_video_register(struct cx25821_dev *dev) err = hdl->error; goto fail_unreg; } + err = v4l2_ctrl_handler_setup(hdl); + if (err) + goto fail_unreg; cx25821_risc_stopper(dev->pci, &dev->channels[i].vidq.stopper, dev->channels[i].sram_channels->dma_ctl, 0x11, 0); @@ -1567,6 +1554,7 @@ int cx25821_video_register(struct cx25821_dev *dev) *vdev = cx25821_video_device; vdev->v4l2_dev = &dev->v4l2_dev; vdev->ctrl_handler = hdl; + vdev->lock = &dev->lock; snprintf(vdev->name, sizeof(vdev->name), "%s #%d", dev->name, i); video_set_drvdata(vdev, dev); @@ -1580,12 +1568,6 @@ int cx25821_video_register(struct cx25821_dev *dev) /* set PCI interrupt */ cx_set(PCI_INT_MSK, 0xff); - /* initial device configuration */ - mutex_lock(&dev->lock); - dev->tvnorm = V4L2_STD_NTSC_M, - cx25821_set_tvnorm(dev, dev->tvnorm); - mutex_unlock(&dev->lock); - return 0; fail_unreg: -- cgit