From e7a7f5103bddf2491760677cdd715a865b889072 Mon Sep 17 00:00:00 2001 From: =?utf8?q?Erik=20Andr=C3=A9n?= Date: Wed, 26 Nov 2008 13:15:35 -0300 Subject: [PATCH] V4L/DVB (10015): gspca - m5602: Add initial read sensor implementation 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_bridge.h | 3 ++ drivers/media/video/gspca/m5602/m5602_core.c | 36 +++++++++++++++++++ 2 files changed, 39 insertions(+) diff --git a/drivers/media/video/gspca/m5602/m5602_bridge.h b/drivers/media/video/gspca/m5602/m5602_bridge.h index 51376e2a902d..a3f3b7a0c7e7 100644 --- a/drivers/media/video/gspca/m5602/m5602_bridge.h +++ b/drivers/media/video/gspca/m5602/m5602_bridge.h @@ -136,4 +136,7 @@ int m5602_write_bridge( int m5602_write_sensor(struct sd *sd, const u8 address, u8 *i2c_data, const u8 len); +int m5602_read_sensor(struct sd *sd, const u8 address, + u8 *i2c_data, const u8 len); + #endif diff --git a/drivers/media/video/gspca/m5602/m5602_core.c b/drivers/media/video/gspca/m5602/m5602_core.c index d69e3c4ff97d..aaba42058181 100644 --- a/drivers/media/video/gspca/m5602/m5602_core.c +++ b/drivers/media/video/gspca/m5602/m5602_core.c @@ -80,6 +80,42 @@ int m5602_write_bridge(struct sd *sd, u8 address, u8 i2c_data) return (err < 0) ? err : 0; } +int m5602_read_sensor(struct sd *sd, const u8 address, + u8 *i2c_data, const u8 len) +{ + int err, i; + + do { + err = m5602_read_bridge(sd, M5602_XB_I2C_STATUS, i2c_data); + } while ((*i2c_data & I2C_BUSY) && !err); + + err = m5602_write_bridge(sd, M5602_XB_I2C_DEV_ADDR, + sd->sensor->i2c_slave_id); + if (err < 0) + goto out; + + 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); + if (err < 0) + goto out; + + 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); + } +out: + return err; +} + int m5602_write_sensor(struct sd *sd, const u8 address, u8 *i2c_data, const u8 len) { -- 2.30.2