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V4L/DVB (13026): s2250-board: Implement brightness and contrast controls

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The brightness and contrast controls were added to the Sensoray 2250 device.
A read register function was added to set the correct bit fields.

Signed-off-by: Pete Eberlein <pete@sensoray.com>
Signed-off-by: Douglas Schilling Landgraf <dougsland@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Pete Eberlein 2009-09-18 22:55:13 -03:00 committed by Mauro Carvalho Chehab
parent d66ddf2172
commit 047efc7db9
1 changed files with 72 additions and 5 deletions
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77
drivers/staging/go7007/s2250-board.c
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@ -112,7 +112,7 @@ static u16 vid_regs_fp_pal[] =
};
struct s2250 {
int std;
v4l2_std_id std;
int input;
int brightness;
int contrast;
@ -240,6 +240,45 @@ static int write_reg_fp(struct i2c_client *client, u16 addr, u16 val)
return 0;
}
static int read_reg_fp(struct i2c_client *client, u16 addr, u16 *val)
{
struct go7007 *go = i2c_get_adapdata(client->adapter);
struct go7007_usb *usb;
u8 *buf;
if (go == NULL)
return -ENODEV;
if (go->status == STATUS_SHUTDOWN)
return -EBUSY;
buf = kzalloc(16, GFP_KERNEL);
if (buf == NULL)
return -ENOMEM;
memset(buf, 0xcd, 6);
usb = go->hpi_context;
if (down_interruptible(&usb->i2c_lock) != 0) {
printk(KERN_INFO "i2c lock failed\n");
kfree(buf);
return -EINTR;
}
if (go7007_usb_vendor_request(go, 0x58, addr, 0, buf, 16, 1) < 0) {
kfree(buf);
return -EFAULT;
}
up(&usb->i2c_lock);
*val = (buf[0] << 8) | buf[1];
kfree(buf);
return 0;
}
static int write_regs(struct i2c_client *client, u8 *regs)
{
int i;
@ -354,14 +393,42 @@ static int s2250_command(struct i2c_client *client,
{
struct v4l2_control *ctrl = arg;
int value1;
u16 oldvalue;
switch (ctrl->id) {
case V4L2_CID_BRIGHTNESS:
printk(KERN_INFO "s2250: future setting\n");
return -EINVAL;
if (ctrl->value > 100)
dec->brightness = 100;
else if (ctrl->value < 0)
dec->brightness = 0;
else
dec->brightness = ctrl->value;
value1 = (dec->brightness - 50) * 255 / 100;
read_reg_fp(client, VPX322_ADDR_BRIGHTNESS0, &oldvalue);
write_reg_fp(client, VPX322_ADDR_BRIGHTNESS0,
value1 | (oldvalue & ~0xff));
read_reg_fp(client, VPX322_ADDR_BRIGHTNESS1, &oldvalue);
write_reg_fp(client, VPX322_ADDR_BRIGHTNESS1,
value1 | (oldvalue & ~0xff));
write_reg_fp(client, 0x140, 0x60);
break;
case V4L2_CID_CONTRAST:
printk(KERN_INFO "s2250: future setting\n");
return -EINVAL;
if (ctrl->value > 100)
dec->contrast = 100;
else if (ctrl->value < 0)
dec->contrast = 0;
else
dec->contrast = ctrl->value;
value1 = dec->contrast * 0x40 / 100;
if (value1 > 0x3f)
value1 = 0x3f; /* max */
read_reg_fp(client, VPX322_ADDR_CONTRAST0, &oldvalue);
write_reg_fp(client, VPX322_ADDR_CONTRAST0,
value1 | (oldvalue & ~0x3f));
read_reg_fp(client, VPX322_ADDR_CONTRAST1, &oldvalue);
write_reg_fp(client, VPX322_ADDR_CONTRAST1,
value1 | (oldvalue & ~0x3f));
write_reg_fp(client, 0x140, 0x60);
break;
case V4L2_CID_SATURATION:
if (ctrl->value > 127)