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[media] dt3155v4l: add v4l2_device support

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Add struct v4l2_device and register it. Also move the request_irq to
probe instead of doing that in open().

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
This commit is contained in:
Hans Verkuil 2015-04-25 11:32:54 -03:00 committed by Mauro Carvalho Chehab
parent 79656225e3
commit 168b5092cc
2 changed files with 31 additions and 18 deletions
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45
drivers/staging/media/dt3155v4l/dt3155v4l.c
View File

@ -378,10 +378,6 @@ static int dt3155_open(struct file *filp)
/* disable all irqs, clear all irq flags */
iowrite32(FLD_START | FLD_END_EVEN | FLD_END_ODD,
pd->regs + INT_CSR);
ret = request_irq(pd->pdev->irq, dt3155_irq_handler_even,
IRQF_SHARED, DT3155_NAME, pd);
if (ret)
goto err_request_irq;
}
pd->users++;
mutex_unlock(&pd->mux);
@ -403,7 +399,6 @@ static int dt3155_release(struct file *filp)
BUG_ON(pd->users < 0);
if (!pd->users) {
vb2_queue_release(pd->q);
free_irq(pd->pdev->irq, pd);
if (pd->q->alloc_ctx[0])
vb2_dma_contig_cleanup_ctx(pd->q->alloc_ctx[0]);
kfree(pd->q);
@ -652,9 +647,9 @@ static const struct v4l2_ioctl_ops dt3155_ioctl_ops = {
.vidioc_s_parm = dt3155_s_parm,
};
static int dt3155_init_board(struct pci_dev *pdev)
static int dt3155_init_board(struct dt3155_priv *pd)
{
struct dt3155_priv *pd = pci_get_drvdata(pdev);
struct pci_dev *pdev = pd->pdev;
void *buf_cpu;
dma_addr_t buf_dma;
int i;
@ -833,8 +828,11 @@ static int dt3155_probe(struct pci_dev *pdev, const struct pci_device_id *id)
if (!pd)
return -ENOMEM;
err = v4l2_device_register(&pdev->dev, &pd->v4l2_dev);
if (err)
return err;
pd->vdev = dt3155_vdev;
pci_set_drvdata(pdev, pd); /* for use in dt3155_remove() */
pd->vdev.v4l2_dev = &pd->v4l2_dev;
video_set_drvdata(&pd->vdev, pd); /* for use in video_fops */
pd->users = 0;
pd->pdev = pdev;
@ -846,42 +844,53 @@ static int dt3155_probe(struct pci_dev *pdev, const struct pci_device_id *id)
pd->config = config_init;
err = pci_enable_device(pdev);
if (err)
return err;
goto err_v4l2_dev_unreg;
err = pci_request_region(pdev, 0, pci_name(pdev));
if (err)
goto err_req_region;
goto err_pci_disable;
pd->regs = pci_iomap(pdev, 0, pci_resource_len(pd->pdev, 0));
if (!pd->regs) {
err = -ENOMEM;
goto err_pci_iomap;
goto err_free_reg;
}
err = dt3155_init_board(pdev);
err = dt3155_init_board(pd);
if (err)
goto err_init_board;
goto err_iounmap;
err = request_irq(pd->pdev->irq, dt3155_irq_handler_even,
IRQF_SHARED, DT3155_NAME, pd);
if (err)
goto err_iounmap;
err = video_register_device(&pd->vdev, VFL_TYPE_GRABBER, -1);
if (err)
goto err_init_board;
goto err_free_irq;
if (dt3155_alloc_coherent(&pdev->dev, DT3155_CHUNK_SIZE,
DMA_MEMORY_MAP))
dev_info(&pdev->dev, "preallocated 8 buffers\n");
dev_info(&pdev->dev, "/dev/video%i is ready\n", pd->vdev.minor);
return 0; /* success */
err_init_board:
err_free_irq:
free_irq(pd->pdev->irq, pd);
err_iounmap:
pci_iounmap(pdev, pd->regs);
err_pci_iomap:
err_free_reg:
pci_release_region(pdev, 0);
err_req_region:
err_pci_disable:
pci_disable_device(pdev);
err_v4l2_dev_unreg:
v4l2_device_unregister(&pd->v4l2_dev);
return err;
}
static void dt3155_remove(struct pci_dev *pdev)
{
struct dt3155_priv *pd = pci_get_drvdata(pdev);
struct v4l2_device *v4l2_dev = pci_get_drvdata(pdev);
struct dt3155_priv *pd = container_of(v4l2_dev, struct dt3155_priv, v4l2_dev);
dt3155_free_coherent(&pdev->dev);
video_unregister_device(&pd->vdev);
free_irq(pd->pdev->irq, pd);
v4l2_device_unregister(&pd->v4l2_dev);
pci_iounmap(pdev, pd->regs);
pci_release_region(pdev, 0);
pci_disable_device(pdev);

4
drivers/staging/media/dt3155v4l/dt3155v4l.h
View File

@ -20,6 +20,8 @@
#include <linux/pci.h>
#include <linux/interrupt.h>
#include <media/v4l2-device.h>
#include <media/v4l2-dev.h>
#define DT3155_NAME "dt3155"
#define DT3155_VER_MAJ 1
@ -157,6 +159,7 @@
/**
* struct dt3155_priv - private data structure
*
* @v4l2_dev: v4l2_device structure
* @vdev: video_device structure
* @pdev: pointer to pci_dev structure
* @q pointer to vb2_queue structure
@ -172,6 +175,7 @@
* @config: local copy of config register
*/
struct dt3155_priv {
struct v4l2_device v4l2_dev;
struct video_device vdev;
struct pci_dev *pdev;
struct vb2_queue *q;