diff options
Diffstat (limited to 'drivers/media/video')
| -rw-r--r-- | drivers/media/video/gspca/mr97310a.c | 56 |
1 files changed, 47 insertions, 9 deletions
diff --git a/drivers/media/video/gspca/mr97310a.c b/drivers/media/video/gspca/mr97310a.c index 7540ea94e1a..1ee3d1ee5a4 100644 --- a/drivers/media/video/gspca/mr97310a.c +++ b/drivers/media/video/gspca/mr97310a.c @@ -220,7 +220,8 @@ static int sensor_write_regs(struct gspca_dev *gspca_dev, static int sensor_write1(struct gspca_dev *gspca_dev, u8 reg, u8 data) { - u8 buf; + struct sd *sd = (struct sd *) gspca_dev; + u8 buf, confirm_reg; int rc; buf = data; @@ -229,7 +230,8 @@ static int sensor_write1(struct gspca_dev *gspca_dev, u8 reg, u8 data) return rc; buf = 0x01; - rc = sensor_write_reg(gspca_dev, 0x13, 0x00, &buf, 1); + confirm_reg = sd->sensor_type ? 0x13 : 0x11; + rc = sensor_write_reg(gspca_dev, confirm_reg, 0x00, &buf, 1); if (rc < 0) return rc; @@ -400,8 +402,7 @@ static int sd_config(struct gspca_dev *gspca_dev, sd->sensor_type); if (sd->sensor_type == 0) - gspca_dev->ctrl_dis = (1 << BRIGHTNESS_IDX) | - (1 << EXPOSURE_IDX) | (1 << GAIN_IDX); + gspca_dev->ctrl_dis = (1 << BRIGHTNESS_IDX); } else { sd->cam_type = CAM_TYPE_VGA; PDEBUG(D_PROBE, "MR97310A VGA camera detected"); @@ -767,10 +768,43 @@ static void setexposure(struct gspca_dev *gspca_dev) if (gspca_dev->ctrl_dis & (1 << EXPOSURE_IDX)) return; - val = sd->exposure >> 4; - sensor_write1(gspca_dev, 3, val); - val = sd->exposure & 0xf; - sensor_write1(gspca_dev, 4, val); + if (sd->sensor_type) { + val = sd->exposure >> 4; + sensor_write1(gspca_dev, 3, val); + val = sd->exposure & 0xf; + sensor_write1(gspca_dev, 4, val); + } else { + u8 clockdiv; + int exposure; + + /* We have both a clock divider and an exposure register. + We first calculate the clock divider, as that determines + the maximum exposure and then we calculayte the exposure + register setting (which goes from 0 - 511). + + Note our 0 - 4095 exposure is mapped to 0 - 511 + milliseconds exposure time */ + clockdiv = (60 * sd->exposure + 7999) / 8000; + + /* Limit framerate to not exceed usb bandwidth */ + if (clockdiv < 3 && gspca_dev->width >= 320) + clockdiv = 3; + else if (clockdiv < 2) + clockdiv = 2; + + /* Frame exposure time in ms = 1000 * clockdiv / 60 -> + exposure = (sd->exposure / 8) * 511 / (1000 * clockdiv / 60) */ + exposure = (60 * 511 * sd->exposure) / (8000 * clockdiv); + if (exposure > 511) + exposure = 511; + + /* exposure register value is reversed! */ + exposure = 511 - exposure; + + sensor_write1(gspca_dev, 0x02, clockdiv); + sensor_write1(gspca_dev, 0x0e, exposure & 0xff); + sensor_write1(gspca_dev, 0x0f, exposure >> 8); + } } static void setgain(struct gspca_dev *gspca_dev) @@ -780,7 +814,11 @@ static void setgain(struct gspca_dev *gspca_dev) if (gspca_dev->ctrl_dis & (1 << GAIN_IDX)) return; - sensor_write1(gspca_dev, 3, sd->gain); + if (sd->sensor_type) { + sensor_write1(gspca_dev, 3, sd->gain); + } else { + sensor_write1(gspca_dev, 0x10, sd->gain); + } } static int sd_setbrightness(struct gspca_dev *gspca_dev, __s32 val) |