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V4L/DVB (11642): gspca - m5602-ov7660: Add a gain ctrl 

Signed-off-by: Erik Andrén <erik.andren@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Erik Andrén 2009-01-22 04:04:59 -03:00 committed by Mauro Carvalho Chehab
parent 2b622e2d00
commit c9304e43fb
2 changed files with 62 additions and 5 deletions
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65
drivers/media/video/gspca/m5602/m5602_ov7660.c
View File

@ -18,7 +18,26 @@
#include "m5602_ov7660.h"
const static struct ctrl ov7660_ctrls[] = {};
static int ov7660_get_gain(struct gspca_dev *gspca_dev, __s32 *val);
static int ov7660_set_gain(struct gspca_dev *gspca_dev, __s32 val);
const static struct ctrl ov7660_ctrls[] = {
#define GAIN_IDX 1
{
{
.id = V4L2_CID_GAIN,
.type = V4L2_CTRL_TYPE_INTEGER,
.name = "gain",
.minimum = 0x00,
.maximum = 0xff,
.step = 0x1,
.default_value = DEFAULT_GAIN,
.flags = V4L2_CTRL_FLAG_SLIDER
},
.set = ov7660_set_gain,
.get = ov7660_get_gain
},
};
static struct v4l2_pix_format ov7660_modes[] = {
{
@ -85,6 +104,11 @@ int ov7660_probe(struct sd *sd)
return -ENODEV;
sensor_found:
sensor_settings = kmalloc(
ARRAY_SIZE(ov7660_ctrls) * sizeof(s32), GFP_KERNEL);
if (!sensor_settings)
return -ENOMEM;
sd->gspca_dev.cam.cam_mode = ov7660_modes;
sd->gspca_dev.cam.nmodes = ARRAY_SIZE(ov7660_modes);
sd->desc->ctrls = ov7660_ctrls;
@ -100,6 +124,7 @@ sensor_found:
int ov7660_init(struct sd *sd)
{
int i, err = 0;
s32 *sensor_settings = sd->sensor_priv;
/* Init the sensor */
for (i = 0; i < ARRAY_SIZE(init_ov7660); i++) {
@ -119,6 +144,10 @@ int ov7660_init(struct sd *sd)
if (dump_sensor)
ov7660_dump_registers(sd);
err = ov7660_set_gain(&sd->gspca_dev, sensor_settings[GAIN_IDX]);
if (err < 0)
return err;
return err;
}
@ -132,7 +161,38 @@ int ov7660_stop(struct sd *sd)
return 0;
}
void ov7660_disconnect(struct sd *sd) {}
void ov7660_disconnect(struct sd *sd)
{
ov7660_stop(sd);
sd->sensor = NULL;
kfree(sd->sensor_priv);
}
static int ov7660_get_gain(struct gspca_dev *gspca_dev, __s32 *val)
{
struct sd *sd = (struct sd *) gspca_dev;
s32 *sensor_settings = sd->sensor_priv;
*val = sensor_settings[GAIN_IDX];
PDEBUG(D_V4L2, "Read gain %d", *val);
return 0;
}
static int ov7660_set_gain(struct gspca_dev *gspca_dev, __s32 val)
{
int err;
u8 i2c_data;
struct sd *sd = (struct sd *) gspca_dev;
s32 *sensor_settings = sd->sensor_priv;
PDEBUG(D_V4L2, "Setting gain to %d", val);
sensor_settings[GAIN_IDX] = val;
err = m5602_write_sensor(sd, OV7660_GAIN, &i2c_data, 1);
return err;
}
static void ov7660_dump_registers(struct sd *sd)
{
@ -165,4 +225,3 @@ static void ov7660_dump_registers(struct sd *sd)
m5602_write_sensor(sd, address, &old_value, 1);
}
}

2
drivers/media/video/gspca/m5602/m5602_ov7660.h
View File

@ -179,7 +179,6 @@ static const unsigned char init_ov7660[][4] =
{SENSOR, OV7660_AECH, DEFAULT_EXPOSURE},
{SENSOR, OV7660_COM1, 0x00},
{SENSOR, OV7660_GAIN, DEFAULT_GAIN},
{BRIDGE, M5602_XB_GPIO_DIR, 0x01},
{BRIDGE, M5602_XB_GPIO_DAT, 0x04},
@ -262,7 +261,6 @@ static const unsigned char init_ov7660[][4] =
{SENSOR, OV7660_AECH, 0x20},
{SENSOR, OV7660_COM1, 0x00},
{SENSOR, OV7660_GAIN, DEFAULT_GAIN},
{SENSOR, OV7660_OFON, 0x0c},
{SENSOR, OV7660_COM2, 0x11},
{SENSOR, OV7660_COM7, 0x05},