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V4L/DVB (9877): gspca - ov534: Add framerate support.

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Add support for getting and setting framerate via v4l2 controls,
rather than setting a fixed value at module insertion.

Signed-off-by: Jim Paris <jim@jtan.com>
Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Jim Paris 2008-12-10 06:06:20 -03:00 committed by Mauro Carvalho Chehab
parent 627a5ef789
commit 11d9f25da8
1 changed files with 78 additions and 37 deletions
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115
drivers/media/video/gspca/ov534.c
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@ -43,14 +43,12 @@ MODULE_AUTHOR("Antonio Ospite <ospite@studenti.unina.it>");
MODULE_DESCRIPTION("GSPCA/OV534 USB Camera Driver");
MODULE_LICENSE("GPL");
/* global parameters */
static int frame_rate;
/* specific webcam descriptor */
struct sd {
struct gspca_dev gspca_dev; /* !! must be the first item */
__u32 last_fid;
__u32 last_pts;
int frame_rate;
};
/* V4L2 controls supported by the driver */
@ -296,6 +294,40 @@ static const __u8 ov772x_reg_initdata[][2] = {
{ 0x0c, 0xd0 }
};
/* set framerate */
static void ov534_set_frame_rate(struct gspca_dev *gspca_dev)
{
struct sd *sd = (struct sd *) gspca_dev;
int fr = sd->frame_rate;
switch (fr) {
case 50:
sccb_reg_write(gspca_dev->dev, 0x11, 0x01);
sccb_reg_write(gspca_dev->dev, 0x0d, 0x41);
ov534_reg_write(gspca_dev->dev, 0xe5, 0x02);
break;
case 40:
sccb_reg_write(gspca_dev->dev, 0x11, 0x02);
sccb_reg_write(gspca_dev->dev, 0x0d, 0xc1);
ov534_reg_write(gspca_dev->dev, 0xe5, 0x04);
break;
/* case 30: */
default:
fr = 30;
sccb_reg_write(gspca_dev->dev, 0x11, 0x04);
sccb_reg_write(gspca_dev->dev, 0x0d, 0x81);
ov534_reg_write(gspca_dev->dev, 0xe5, 0x02);
break;
case 15:
sccb_reg_write(gspca_dev->dev, 0x11, 0x03);
sccb_reg_write(gspca_dev->dev, 0x0d, 0x41);
ov534_reg_write(gspca_dev->dev, 0xe5, 0x04);
break;
}
sd->frame_rate = fr;
PDEBUG(D_PROBE, "frame_rate: %d", fr);
}
/* setup method */
static void ov534_setup(struct usb_device *udev)
@ -339,38 +371,8 @@ static int sd_config(struct gspca_dev *gspca_dev,
/* this function is called at probe and resume time */
static int sd_init(struct gspca_dev *gspca_dev)
{
int fr;
ov534_setup(gspca_dev->dev);
fr = frame_rate;
switch (fr) {
case 50:
sccb_reg_write(gspca_dev->dev, 0x11, 0x01);
sccb_reg_write(gspca_dev->dev, 0x0d, 0x41);
ov534_reg_write(gspca_dev->dev, 0xe5, 0x02);
break;
case 40:
sccb_reg_write(gspca_dev->dev, 0x11, 0x02);
sccb_reg_write(gspca_dev->dev, 0x0d, 0xc1);
ov534_reg_write(gspca_dev->dev, 0xe5, 0x04);
break;
/* case 30: */
default:
fr = 30;
sccb_reg_write(gspca_dev->dev, 0x11, 0x04);
sccb_reg_write(gspca_dev->dev, 0x0d, 0x81);
ov534_reg_write(gspca_dev->dev, 0xe5, 0x02);
break;
case 15:
sccb_reg_write(gspca_dev->dev, 0x11, 0x03);
sccb_reg_write(gspca_dev->dev, 0x0d, 0x41);
ov534_reg_write(gspca_dev->dev, 0xe5, 0x04);
break;
}
PDEBUG(D_PROBE, "frame_rate: %d", fr);
ov534_set_frame_rate(gspca_dev);
return 0;
}
@ -477,6 +479,46 @@ static void sd_pkt_scan(struct gspca_dev *gspca_dev, struct gspca_frame *frame,
goto scan_next;
}
/* get stream parameters (framerate) */
int sd_get_streamparm(struct gspca_dev *gspca_dev,
struct v4l2_streamparm *parm)
{
struct v4l2_captureparm *cp = &parm->parm.capture;
struct v4l2_fract *tpf = &cp->timeperframe;
struct sd *sd = (struct sd *) gspca_dev;
if (parm->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
return -EINVAL;
cp->capability |= V4L2_CAP_TIMEPERFRAME;
tpf->numerator = 1;
tpf->denominator = sd->frame_rate;
return 0;
}
/* set stream parameters (framerate) */
int sd_set_streamparm(struct gspca_dev *gspca_dev,
struct v4l2_streamparm *parm)
{
struct v4l2_captureparm *cp = &parm->parm.capture;
struct v4l2_fract *tpf = &cp->timeperframe;
struct sd *sd = (struct sd *) gspca_dev;
if (parm->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
return -EINVAL;
/* Set requested framerate */
sd->frame_rate = tpf->denominator / tpf->numerator;
ov534_set_frame_rate(gspca_dev);
/* Return the actual framerate */
tpf->numerator = 1;
tpf->denominator = sd->frame_rate;
return 0;
}
/* sub-driver description */
static const struct sd_desc sd_desc = {
.name = MODULE_NAME,
@ -487,6 +529,8 @@ static const struct sd_desc sd_desc = {
.start = sd_start,
.stopN = sd_stopN,
.pkt_scan = sd_pkt_scan,
.get_streamparm = sd_get_streamparm,
.set_streamparm = sd_set_streamparm,
};
/* -- module initialisation -- */
@ -534,6 +578,3 @@ static void __exit sd_mod_exit(void)
module_init(sd_mod_init);
module_exit(sd_mod_exit);
module_param(frame_rate, int, 0644);
MODULE_PARM_DESC(frame_rate, "Frame rate (15, 30, 40, 50)");