static int mt9v011_remove(struct i2c_client *c)
{
struct v4l2_subdev *sd = i2c_get_clientdata(c);
struct mt9v011 *core = to_mt9v011(sd);
v4l2_dbg(1, debug, sd,
"mt9v011.c: removing mt9v011 adapter on address 0x%x\n",
c->addr << 1);
v4l2_device_unregister_subdev(sd);
v4l2_ctrl_handler_free(&core->ctrls);
kfree(to_mt9v011(sd));
return 0;
}
static int mt9v011_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
{
struct mt9v011 *core = to_mt9v011(sd);
v4l2_dbg(1, debug, sd, "g_ctrl called\n");
switch (ctrl->id) {
case V4L2_CID_GAIN:
ctrl->value = core->global_gain;
return 0;
case V4L2_CID_EXPOSURE:
ctrl->value = core->exposure;
return 0;
case V4L2_CID_RED_BALANCE:
ctrl->value = core->red_bal;
return 0;
case V4L2_CID_BLUE_BALANCE:
ctrl->value = core->blue_bal;
return 0;
case V4L2_CID_HFLIP:
ctrl->value = core->hflip ? 1 : 0;
return 0;
case V4L2_CID_VFLIP:
ctrl->value = core->vflip ? 1 : 0;
return 0;
}
return -EINVAL;
}
static void set_res(struct v4l2_subdev *sd)
{
struct mt9v011 *core = to_mt9v011(sd);
unsigned vstart, hstart;
/*
* The mt9v011 doesn't have scaling. So, in order to select the desired
* resolution, we're cropping at the middle of the sensor.
* hblank and vblank should be adjusted, in order to warrant that
* we'll preserve the line timings for 30 fps, no matter what resolution
* is selected.
* NOTE: datasheet says that width (and height) should be filled with
* width-1. However, this doesn't work, since one pixel per line will
* be missing.
*/
hstart = 20 + (640 - core->width) / 2;
mt9v011_write(sd, R02_MT9V011_COLSTART, hstart);
mt9v011_write(sd, R04_MT9V011_WIDTH, core->width);
mt9v011_write(sd, R05_MT9V011_HBLANK, 771 - core->width);
vstart = 8 + (480 - core->height) / 2;
mt9v011_write(sd, R01_MT9V011_ROWSTART, vstart);
mt9v011_write(sd, R03_MT9V011_HEIGHT, core->height);
mt9v011_write(sd, R06_MT9V011_VBLANK, 508 - core->height);
calc_fps(sd, NULL, NULL);
};
static void calc_fps(struct v4l2_subdev *sd, u32 *numerator, u32 *denominator)
{
struct mt9v011 *core = to_mt9v011(sd);
unsigned height, width, hblank, vblank, speed;
unsigned row_time, t_time;
u64 frames_per_ms;
unsigned tmp;
height = mt9v011_read(sd, R03_MT9V011_HEIGHT);
width = mt9v011_read(sd, R04_MT9V011_WIDTH);
hblank = mt9v011_read(sd, R05_MT9V011_HBLANK);
vblank = mt9v011_read(sd, R06_MT9V011_VBLANK);
speed = mt9v011_read(sd, R0A_MT9V011_CLK_SPEED);
row_time = (width + 113 + hblank) * (speed + 2);
t_time = row_time * (height + vblank + 1);
frames_per_ms = core->xtal * 1000l;
do_div(frames_per_ms, t_time);
tmp = frames_per_ms;
v4l2_dbg(1, debug, sd, "Programmed to %u.%03u fps (%d pixel clcks)\n",
tmp / 1000, tmp % 1000, t_time);
if (numerator && denominator) {
*numerator = 1000;
*denominator = (u32)frames_per_ms;
}
}
static void set_balance(struct v4l2_subdev *sd)
{
struct mt9v011 *core = to_mt9v011(sd);
u16 green_gain, blue_gain, red_gain;
u16 exposure;
s16 bal;
exposure = core->exposure;
green_gain = calc_mt9v011_gain(core->global_gain);
bal = core->global_gain;
bal += (core->blue_bal * core->global_gain / (1 << 7));
blue_gain = calc_mt9v011_gain(bal);
bal = core->global_gain;
bal += (core->red_bal * core->global_gain / (1 << 7));
red_gain = calc_mt9v011_gain(bal);
mt9v011_write(sd, R2B_MT9V011_GREEN_1_GAIN, green_gain);
mt9v011_write(sd, R2E_MT9V011_GREEN_2_GAIN, green_gain);
mt9v011_write(sd, R2C_MT9V011_BLUE_GAIN, blue_gain);
mt9v011_write(sd, R2D_MT9V011_RED_GAIN, red_gain);
mt9v011_write(sd, R09_MT9V011_SHUTTER_WIDTH, exposure);
}
static void set_read_mode(struct v4l2_subdev *sd)
{
struct mt9v011 *core = to_mt9v011(sd);
unsigned mode = 0x1000;
if (core->hflip)
mode |= 0x4000;
if (core->vflip)
mode |= 0x8000;
mt9v011_write(sd, R20_MT9V011_READ_MODE, mode);
}
static int mt9v011_s_config(struct v4l2_subdev *sd, int dumb, void *data)
{
struct mt9v011 *core = to_mt9v011(sd);
unsigned *xtal = data;
v4l2_dbg(1, debug, sd, "s_config called\n");
if (xtal) {
core->xtal = *xtal;
v4l2_dbg(1, debug, sd, "xtal set to %d.%03d MHz\n",
*xtal / 1000000, (*xtal / 1000) % 1000);
}
return 0;
}
static int mt9v011_s_mbus_fmt(struct v4l2_subdev *sd, struct v4l2_mbus_framefmt *fmt)
{
struct mt9v011 *core = to_mt9v011(sd);
int rc;
rc = mt9v011_try_mbus_fmt(sd, fmt);
if (rc < 0)
return -EINVAL;
core->width = fmt->width;
core->height = fmt->height;
set_res(sd);
return 0;
}
static int mt9v011_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
{
struct mt9v011 *core = to_mt9v011(sd);
u8 i, n;
n = ARRAY_SIZE(mt9v011_qctrl);
for (i = 0; i < n; i++) {
if (ctrl->id != mt9v011_qctrl[i].id)
continue;
if (ctrl->value < mt9v011_qctrl[i].minimum ||
ctrl->value > mt9v011_qctrl[i].maximum)
return -ERANGE;
v4l2_dbg(1, debug, sd, "s_ctrl: id=%d, value=%d\n",
ctrl->id, ctrl->value);
break;
}
switch (ctrl->id) {
case V4L2_CID_GAIN:
core->global_gain = ctrl->value;
break;
case V4L2_CID_EXPOSURE:
core->exposure = ctrl->value;
break;
case V4L2_CID_RED_BALANCE:
core->red_bal = ctrl->value;
break;
case V4L2_CID_BLUE_BALANCE:
core->blue_bal = ctrl->value;
break;
case V4L2_CID_HFLIP:
core->hflip = ctrl->value;
set_read_mode(sd);
return 0;
case V4L2_CID_VFLIP:
core->vflip = ctrl->value;
set_read_mode(sd);
return 0;
default:
return -EINVAL;
}
set_balance(sd);
return 0;
}
static int mt9v011_s_fmt(struct v4l2_subdev *sd, struct v4l2_format *fmt)
{
struct v4l2_pix_format *pix = &fmt->fmt.pix;
struct mt9v011 *core = to_mt9v011(sd);
int rc;
rc = mt9v011_try_fmt(sd, fmt);
if (rc < 0)
return -EINVAL;
core->width = pix->width;
core->height = pix->height;
set_res(sd);
return 0;
}
static void set_res(struct v4l2_subdev *sd)
{
struct mt9v011 *core = to_mt9v011(sd);
unsigned vstart, hstart;
hstart = 20 + (640 - core->width) / 2;
mt9v011_write(sd, R02_MT9V011_COLSTART, hstart);
mt9v011_write(sd, R04_MT9V011_WIDTH, core->width);
mt9v011_write(sd, R05_MT9V011_HBLANK, 771 - core->width);
vstart = 8 + (480 - core->height) / 2;
mt9v011_write(sd, R01_MT9V011_ROWSTART, vstart);
mt9v011_write(sd, R03_MT9V011_HEIGHT, core->height);
mt9v011_write(sd, R06_MT9V011_VBLANK, 508 - core->height);
calc_fps(sd, NULL, NULL);
};
static void set_balance(struct v4l2_subdev *sd)
{
struct mt9v011 *core = to_mt9v011(sd);
u16 green1_gain, green2_gain, blue_gain, red_gain;
green1_gain = core->global_gain;
green2_gain = core->global_gain;
blue_gain = core->global_gain +
core->global_gain * core->blue_bal / (1 << 9);
red_gain = core->global_gain +
core->global_gain * core->blue_bal / (1 << 9);
mt9v011_write(sd, R2B_MT9V011_GREEN_1_GAIN, green1_gain);
mt9v011_write(sd, R2E_MT9V011_GREEN_2_GAIN, green1_gain);
mt9v011_write(sd, R2C_MT9V011_BLUE_GAIN, blue_gain);
mt9v011_write(sd, R2D_MT9V011_RED_GAIN, red_gain);
}
static u16 calc_speed(struct v4l2_subdev *sd, u32 numerator, u32 denominator)
{
struct mt9v011 *core = to_mt9v011(sd);
unsigned height, width, hblank, vblank;
unsigned row_time, line_time;
u64 t_time, speed;
/* Avoid bogus calculus */
if (!numerator || !denominator)
return 0;
height = mt9v011_read(sd, R03_MT9V011_HEIGHT);
width = mt9v011_read(sd, R04_MT9V011_WIDTH);
hblank = mt9v011_read(sd, R05_MT9V011_HBLANK);
vblank = mt9v011_read(sd, R06_MT9V011_VBLANK);
row_time = width + 113 + hblank;
line_time = height + vblank + 1;
t_time = core->xtal * ((u64)numerator);
/* round to the closest value */
t_time += denominator / 2;
do_div(t_time, denominator);
speed = t_time;
do_div(speed, row_time * line_time);
/* Avoid having a negative value for speed */
if (speed < 2)
speed = 0;
else
speed -= 2;
/* Avoid speed overflow */
if (speed > 15)
return 15;
return (u16)speed;
}
static u16 calc_speed(struct v4l2_subdev *sd, u32 numerator, u32 denominator)
{
struct mt9v011 *core = to_mt9v011(sd);
unsigned height, width, hblank, vblank;
unsigned row_time, line_time;
u64 t_time, speed;
if (!numerator || !denominator)
return 0;
height = mt9v011_read(sd, R03_MT9V011_HEIGHT);
width = mt9v011_read(sd, R04_MT9V011_WIDTH);
hblank = mt9v011_read(sd, R05_MT9V011_HBLANK);
vblank = mt9v011_read(sd, R06_MT9V011_VBLANK);
row_time = width + 113 + hblank;
line_time = height + vblank + 1;
t_time = core->xtal * ((u64)numerator);
t_time += denominator / 2;
do_div(t_time, denominator);
speed = t_time;
do_div(speed, row_time * line_time);
if (speed < 2)
speed = 0;
else
speed -= 2;
if (speed > 15)
return 15;
return (u16)speed;
}