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authorErik Andrén <erik.andren@gmail.com>2008-11-26 13:15:35 -0300
committerMauro Carvalho Chehab <mchehab@redhat.com>2008-12-30 09:39:52 -0200
commite7a7f5103bddf2491760677cdd715a865b889072 (patch)
tree06148fd9af034bee748961491170ec7ac2e7f27a /drivers
parentfce65f6515f049dea9451afaa0e85af01aecd190 (diff)
V4L/DVB (10015): gspca - m5602: Add initial read sensor implementation
Signed-off-by: Erik Andrén <erik.andren@gmail.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/media/video/gspca/m5602/m5602_bridge.h3
-rw-r--r--drivers/media/video/gspca/m5602/m5602_core.c36
2 files changed, 39 insertions, 0 deletions
diff --git a/drivers/media/video/gspca/m5602/m5602_bridge.h b/drivers/media/video/gspca/m5602/m5602_bridge.h
index 51376e2a902..a3f3b7a0c7e 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 d69e3c4ff97..aaba4205818 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)
{