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authorPete Eberlein <pete@sensoray.com>2009-09-18 22:55:13 -0300
committerMauro Carvalho Chehab <mchehab@redhat.com>2009-09-19 00:54:08 -0300
commit047efc7db9fea32703e8ba04629562e52cccdf88 (patch)
treed7f3759dd6a68eeaf591255f2078797e3fac4652 /drivers/staging
parentd66ddf21723146a69915a0cf46db77f409e74602 (diff)
downloadblackbird-op-linux-047efc7db9fea32703e8ba04629562e52cccdf88.tar.gz
blackbird-op-linux-047efc7db9fea32703e8ba04629562e52cccdf88.zip
V4L/DVB (13026): s2250-board: Implement brightness and contrast controls
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>
Diffstat (limited to 'drivers/staging')
-rw-r--r--drivers/staging/go7007/s2250-board.c77
1 files changed, 72 insertions, 5 deletions
diff --git a/drivers/staging/go7007/s2250-board.c b/drivers/staging/go7007/s2250-board.c
index 3310961de1ec..8c85a9c3665a 100644
--- a/drivers/staging/go7007/s2250-board.c
+++ b/drivers/staging/go7007/s2250-board.c
@@ -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)
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