From e07b14e80be3d93807a6dc01edb80e0cc38040ad Mon Sep 17 00:00:00 2001 From: =?utf8?q?Erik=20Andr=C3=A9n?= Date: Thu, 20 Nov 2008 03:54:43 -0300 Subject: [PATCH] V4L/DVB (10003): m5602: Simplify the error handling in the ov9650 sensor MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Signed-off-by: Erik Andrén Signed-off-by: Mauro Carvalho Chehab --- .../media/video/gspca/m5602/m5602_ov9650.c | 81 +++++++++++-------- 1 file changed, 46 insertions(+), 35 deletions(-) diff --git a/drivers/media/video/gspca/m5602/m5602_ov9650.c b/drivers/media/video/gspca/m5602/m5602_ov9650.c index 68f651fb5080..cf917b2aaa85 100644 --- a/drivers/media/video/gspca/m5602/m5602_ov9650.c +++ b/drivers/media/video/gspca/m5602/m5602_ov9650.c @@ -67,18 +67,29 @@ int ov9650_read_sensor(struct sd *sd, const u8 address, err = m5602_read_bridge(sd, M5602_XB_I2C_STATUS, i2c_data); } while ((*i2c_data & I2C_BUSY) && !err); - m5602_write_bridge(sd, M5602_XB_I2C_DEV_ADDR, - ov9650.i2c_slave_id); - m5602_write_bridge(sd, M5602_XB_I2C_REG_ADDR, address); - m5602_write_bridge(sd, M5602_XB_I2C_CTRL, 0x10 + len); - m5602_write_bridge(sd, M5602_XB_I2C_CTRL, 0x08); + err = m5602_write_bridge(sd, M5602_XB_I2C_DEV_ADDR, + ov9650.i2c_slave_id); + if (err < 0) + goto out; - for (i = 0; i < len; i++) { + err = m5602_write_bridge(sd, M5602_XB_I2C_REG_ADDR, address); + if (err < 0) + goto out; + + err = m5602_write_bridge(sd, M5602_XB_I2C_CTRL, 0x10 + len); + if (err < 0) + goto out; + + err = m5602_write_bridge(sd, M5602_XB_I2C_CTRL, 0x08); + + for (i = 0; (i < len) && !err; i++) { err = m5602_read_bridge(sd, M5602_XB_I2C_DATA, &(i2c_data[i])); PDEBUG(D_CONF, "Reading sensor register " - "0x%x containing 0x%x ", address, *i2c_data); + "0x%x containing 0x%x ", address, *i2c_data); } + +out: return (err < 0) ? err : 0; } @@ -103,7 +114,7 @@ int ov9650_write_sensor(struct sd *sd, const u8 address, /* Special case larger sensor writes */ p = buf + 16; - /* Copy a four byte write sequence for each byte to be written to */ + /* Copy a four byte write sequence for each byte to write over the I2C bus */ for (i = 0; i < len; i++) { memcpy(p, sensor_urb_skeleton + 16, 4); p[3] = i2c_data[i]; @@ -190,28 +201,28 @@ int ov9650_init(struct sd *sd) err = m5602_write_bridge(sd, init_ov9650[i][1], data); } - if (!err && dmi_check_system(ov9650_flip_dmi_table)) { + if (dmi_check_system(ov9650_flip_dmi_table) && !err) { info("vflip quirk active"); data = 0x30; err = ov9650_write_sensor(sd, OV9650_MVFP, &data, 1); } - return (err < 0) ? err : 0; + return err; } int ov9650_power_down(struct sd *sd) { - int i; - for (i = 0; i < ARRAY_SIZE(power_down_ov9650); i++) { + int i, err = 0; + for (i = 0; i < ARRAY_SIZE(power_down_ov9650) && !err; i++) { u8 data = power_down_ov9650[i][2]; if (power_down_ov9650[i][0] == SENSOR) - ov9650_write_sensor(sd, + err = ov9650_write_sensor(sd, power_down_ov9650[i][1], &data, 1); else - m5602_write_bridge(sd, power_down_ov9650[i][1], data); + err = m5602_write_bridge(sd, power_down_ov9650[i][1], data); } - return 0; + return err; } int ov9650_get_exposure(struct gspca_dev *gspca_dev, __s32 *val) @@ -237,7 +248,7 @@ int ov9650_get_exposure(struct gspca_dev *gspca_dev, __s32 *val) PDEBUG(D_V4L2, "Read exposure %d", *val); out: - return (err < 0) ? err : 0; + return err; } int ov9650_set_exposure(struct gspca_dev *gspca_dev, __s32 val) @@ -268,7 +279,7 @@ int ov9650_set_exposure(struct gspca_dev *gspca_dev, __s32 val) err = ov9650_write_sensor(sd, OV9650_COM1, &i2c_data, 1); out: - return (err < 0) ? err : 0; + return err; } int ov9650_get_gain(struct gspca_dev *gspca_dev, __s32 *val) @@ -283,7 +294,7 @@ int ov9650_get_gain(struct gspca_dev *gspca_dev, __s32 *val) err = ov9650_read_sensor(sd, OV9650_GAIN, &i2c_data, 1); *val |= i2c_data; PDEBUG(D_V4L2, "Read gain %d", *val); - return (err < 0) ? err : 0; + return err; } int ov9650_set_gain(struct gspca_dev *gspca_dev, __s32 val) @@ -304,7 +315,7 @@ int ov9650_set_gain(struct gspca_dev *gspca_dev, __s32 val) /* The 8 LSBs */ i2c_data = val & 0xff; err = ov9650_write_sensor(sd, OV9650_GAIN, &i2c_data, 1); - return (err < 0) ? err : 0; + return err; } int ov9650_get_red_balance(struct gspca_dev *gspca_dev, __s32 *val) @@ -318,7 +329,7 @@ int ov9650_get_red_balance(struct gspca_dev *gspca_dev, __s32 *val) PDEBUG(D_V4L2, "Read red gain %d", *val); - return (err < 0) ? err : 0; + return err; } int ov9650_set_red_balance(struct gspca_dev *gspca_dev, __s32 val) @@ -333,7 +344,7 @@ int ov9650_set_red_balance(struct gspca_dev *gspca_dev, __s32 val) i2c_data = val & 0xff; err = ov9650_write_sensor(sd, OV9650_RED, &i2c_data, 1); - return (err < 0) ? err : 0; + return err; } int ov9650_get_blue_balance(struct gspca_dev *gspca_dev, __s32 *val) @@ -347,7 +358,7 @@ int ov9650_get_blue_balance(struct gspca_dev *gspca_dev, __s32 *val) PDEBUG(D_V4L2, "Read blue gain %d", *val); - return (err < 0) ? err : 0; + return err; } int ov9650_set_blue_balance(struct gspca_dev *gspca_dev, __s32 val) @@ -362,7 +373,7 @@ int ov9650_set_blue_balance(struct gspca_dev *gspca_dev, __s32 val) i2c_data = val & 0xff; err = ov9650_write_sensor(sd, OV9650_BLUE, &i2c_data, 1); - return (err < 0) ? err : 0; + return err; } int ov9650_get_hflip(struct gspca_dev *gspca_dev, __s32 *val) @@ -378,7 +389,7 @@ int ov9650_get_hflip(struct gspca_dev *gspca_dev, __s32 *val) *val = (i2c_data & OV9650_HFLIP) >> 5; PDEBUG(D_V4L2, "Read horizontal flip %d", *val); - return (err < 0) ? err : 0; + return err; } int ov9650_set_hflip(struct gspca_dev *gspca_dev, __s32 val) @@ -394,14 +405,14 @@ int ov9650_set_hflip(struct gspca_dev *gspca_dev, __s32 val) if (dmi_check_system(ov9650_flip_dmi_table)) i2c_data = ((i2c_data & 0xdf) | - (((val ? 0 : 1) & 0x01) << 5)); + (((val ? 0 : 1) & 0x01) << 5)); else i2c_data = ((i2c_data & 0xdf) | - ((val & 0x01) << 5)); + ((val & 0x01) << 5)); err = ov9650_write_sensor(sd, OV9650_MVFP, &i2c_data, 1); out: - return (err < 0) ? err : 0; + return err; } int ov9650_get_vflip(struct gspca_dev *gspca_dev, __s32 *val) @@ -417,7 +428,7 @@ int ov9650_get_vflip(struct gspca_dev *gspca_dev, __s32 *val) *val = (i2c_data & 0x10) >> 4; PDEBUG(D_V4L2, "Read vertical flip %d", *val); - return (err < 0) ? err : 0; + return err; } int ov9650_set_vflip(struct gspca_dev *gspca_dev, __s32 val) @@ -440,7 +451,7 @@ int ov9650_set_vflip(struct gspca_dev *gspca_dev, __s32 val) err = ov9650_write_sensor(sd, OV9650_MVFP, &i2c_data, 1); out: - return (err < 0) ? err : 0; + return err; } int ov9650_get_brightness(struct gspca_dev *gspca_dev, __s32 *val) @@ -458,7 +469,7 @@ int ov9650_get_brightness(struct gspca_dev *gspca_dev, __s32 *val) *val |= i2c_data; PDEBUG(D_V4L2, "Read gain %d", *val); out: - return (err < 0) ? err : 0; + return err; } int ov9650_set_brightness(struct gspca_dev *gspca_dev, __s32 val) @@ -486,7 +497,7 @@ int ov9650_set_brightness(struct gspca_dev *gspca_dev, __s32 val) err = ov9650_write_sensor(sd, OV9650_GAIN, &i2c_data, 1); out: - return (err < 0) ? err : 0; + return err; } int ov9650_get_auto_white_balance(struct gspca_dev *gspca_dev, __s32 *val) @@ -499,7 +510,7 @@ int ov9650_get_auto_white_balance(struct gspca_dev *gspca_dev, __s32 *val) *val = (i2c_data & OV9650_AWB_EN) >> 1; PDEBUG(D_V4L2, "Read auto white balance %d", *val); - return (err < 0) ? err : 0; + return err; } int ov9650_set_auto_white_balance(struct gspca_dev *gspca_dev, __s32 val) @@ -516,7 +527,7 @@ int ov9650_set_auto_white_balance(struct gspca_dev *gspca_dev, __s32 val) i2c_data = ((i2c_data & 0xfd) | ((val & 0x01) << 1)); err = ov9650_write_sensor(sd, OV9650_COM8, &i2c_data, 1); out: - return (err < 0) ? err : 0; + return err; } int ov9650_get_auto_gain(struct gspca_dev *gspca_dev, __s32 *val) @@ -529,7 +540,7 @@ int ov9650_get_auto_gain(struct gspca_dev *gspca_dev, __s32 *val) *val = (i2c_data & OV9650_AGC_EN) >> 2; PDEBUG(D_V4L2, "Read auto gain control %d", *val); - return (err < 0) ? err : 0; + return err; } int ov9650_set_auto_gain(struct gspca_dev *gspca_dev, __s32 val) @@ -546,7 +557,7 @@ int ov9650_set_auto_gain(struct gspca_dev *gspca_dev, __s32 val) i2c_data = ((i2c_data & 0xfb) | ((val & 0x01) << 2)); err = ov9650_write_sensor(sd, OV9650_COM8, &i2c_data, 1); out: - return (err < 0) ? err : 0; + return err; } void ov9650_dump_registers(struct sd *sd) -- 2.20.1