diff options
Diffstat (limited to 'drivers/media')
| -rw-r--r-- | drivers/media/video/gspca/m5602/m5602_ov9650.c | 22 |
1 files changed, 17 insertions, 5 deletions
diff --git a/drivers/media/video/gspca/m5602/m5602_ov9650.c b/drivers/media/video/gspca/m5602/m5602_ov9650.c index da6b72a..292f2d4 100644 --- a/drivers/media/video/gspca/m5602/m5602_ov9650.c +++ b/drivers/media/video/gspca/m5602/m5602_ov9650.c @@ -218,6 +218,7 @@ static void ov9650_dump_registers(struct sd *sd); int ov9650_probe(struct sd *sd) { + int err = 0; u8 prod_id = 0, ver_id = 0, i; if (force_sensor) { @@ -233,15 +234,18 @@ int ov9650_probe(struct sd *sd) info("Probing for an ov9650 sensor"); /* Run the pre-init to actually probe the unit */ - for (i = 0; i < ARRAY_SIZE(preinit_ov9650); i++) { + for (i = 0; i < ARRAY_SIZE(preinit_ov9650) && !err; i++) { u8 data = preinit_ov9650[i][2]; if (preinit_ov9650[i][0] == SENSOR) - m5602_write_sensor(sd, + err = m5602_write_sensor(sd, preinit_ov9650[i][1], &data, 1); else - m5602_write_bridge(sd, preinit_ov9650[i][1], data); + err = m5602_write_bridge(sd, preinit_ov9650[i][1], data); } + if (err < 0) + return err; + if (m5602_read_sensor(sd, OV9650_PID, &prod_id, 1)) return -ENODEV; @@ -458,7 +462,10 @@ int ov9650_get_gain(struct gspca_dev *gspca_dev, __s32 *val) u8 i2c_data; struct sd *sd = (struct sd *) gspca_dev; - m5602_read_sensor(sd, OV9650_VREF, &i2c_data, 1); + err = m5602_read_sensor(sd, OV9650_VREF, &i2c_data, 1); + if (err < 0) + return err; + *val = (i2c_data & 0x03) << 8; err = m5602_read_sensor(sd, OV9650_GAIN, &i2c_data, 1); @@ -476,11 +483,16 @@ int ov9650_set_gain(struct gspca_dev *gspca_dev, __s32 val) /* The 2 MSB */ /* Read the OV9650_VREF register first to avoid corrupting the VREF high and low bits */ - m5602_read_sensor(sd, OV9650_VREF, &i2c_data, 1); + err = m5602_read_sensor(sd, OV9650_VREF, &i2c_data, 1); + if (err < 0) + return err; + /* Mask away all uninteresting bits */ i2c_data = ((val & 0x0300) >> 2) | (i2c_data & 0x3F); err = m5602_write_sensor(sd, OV9650_VREF, &i2c_data, 1); + if (err < 0) + return err; /* The 8 LSBs */ i2c_data = val & 0xff; |