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V4L/DVB (12226): gspca - spca508: Extend the write_vector routine.

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Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Jean-Francois Moine 2009-06-12 03:49:39 -03:00 committed by Mauro Carvalho Chehab
parent 43b786677e
commit c4d363ccd7
1 changed files with 55 additions and 4 deletions
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57
drivers/media/video/gspca/spca508.c
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@ -1304,19 +1304,70 @@ static int reg_read(struct gspca_dev *gspca_dev,
return gspca_dev->usb_buf[0];
}
/* send 1 or 2 bytes to the sensor via the Synchronous Serial Interface */
static int ssi_w(struct gspca_dev *gspca_dev,
u16 reg, u16 val)
{
struct usb_device *dev = gspca_dev->dev;
int ret, retry;
ret = reg_write(dev, 0x8802, reg >> 8);
if (ret < 0)
goto out;
ret = reg_write(dev, 0x8801, reg & 0x00ff);
if (ret < 0)
goto out;
if ((reg & 0xff00) == 0x1000) { /* if 2 bytes */
ret = reg_write(dev, 0x8805, val & 0x00ff);
if (ret < 0)
goto out;
val >>= 8;
}
ret = reg_write(dev, 0x8800, val);
if (ret < 0)
goto out;
/* poll until not busy */
retry = 10;
for (;;) {
ret = reg_read(gspca_dev, 0x8803);
if (ret < 0)
break;
if (gspca_dev->usb_buf[0] == 0)
break;
if (--retry <= 0) {
PDEBUG(D_ERR, "ssi_w busy %02x",
gspca_dev->usb_buf[0]);
ret = -1;
break;
}
msleep(8);
}
out:
return ret;
}
static int write_vector(struct gspca_dev *gspca_dev,
const u16 (*data)[2])
{
struct usb_device *dev = gspca_dev->dev;
int ret;
int ret = 0;
while ((*data)[1] != 0) {
if ((*data)[1] & 0x8000) {
if ((*data)[1] == 0xdd00) /* delay */
msleep((*data)[0]);
else
ret = reg_write(dev, (*data)[1], (*data)[0]);
} else {
ret = ssi_w(gspca_dev, (*data)[1], (*data)[0]);
}
if (ret < 0)
return ret;
break;
data++;
}
return 0;
return ret;
}
/* this function is called at probe time */