diff options
Diffstat (limited to 'drivers/media/video/gspca/m5602/m5602_core.c')
-rw-r--r-- | drivers/media/video/gspca/m5602/m5602_core.c | 100 |
1 files changed, 98 insertions, 2 deletions
diff --git a/drivers/media/video/gspca/m5602/m5602_core.c b/drivers/media/video/gspca/m5602/m5602_core.c index fd6ce38..ed906fe 100644 --- a/drivers/media/video/gspca/m5602/m5602_core.c +++ b/drivers/media/video/gspca/m5602/m5602_core.c @@ -24,7 +24,7 @@ /* Kernel module parameters */ int force_sensor; -int dump_bridge; +static int dump_bridge; int dump_sensor; static const __devinitdata struct usb_device_id m5602_table[] = { @@ -80,6 +80,97 @@ 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; + + if (!len || len > sd->sensor->i2c_regW) + return -EINVAL; + + do { + err = m5602_read_bridge(sd, M5602_XB_I2C_STATUS, i2c_data); + } while ((*i2c_data & I2C_BUSY) && !err); + if (err < 0) + goto out; + + 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; + + if (sd->sensor->i2c_regW == 1) { + err = m5602_write_bridge(sd, M5602_XB_I2C_CTRL, len); + if (err < 0) + goto out; + + err = m5602_write_bridge(sd, M5602_XB_I2C_CTRL, 0x08); + if (err < 0) + goto out; + } else { + err = m5602_write_bridge(sd, M5602_XB_I2C_CTRL, 0x18 + len); + 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) +{ + int err, i; + u8 *p; + struct usb_device *udev = sd->gspca_dev.dev; + __u8 *buf = sd->gspca_dev.usb_buf; + + /* No sensor with a data width larger than 16 bits has yet been seen */ + if (len > sd->sensor->i2c_regW || !len) + return -EINVAL; + + memcpy(buf, sensor_urb_skeleton, + sizeof(sensor_urb_skeleton)); + + buf[11] = sd->sensor->i2c_slave_id; + buf[15] = address; + + /* Special case larger sensor writes */ + p = buf + 16; + + /* Copy a four byte write sequence for each byte to be written to */ + for (i = 0; i < len; i++) { + memcpy(p, sensor_urb_skeleton + 16, 4); + p[3] = i2c_data[i]; + p += 4; + PDEBUG(D_CONF, "Writing sensor register 0x%x with 0x%x", + address, i2c_data[i]); + } + + /* Copy the tailer */ + memcpy(p, sensor_urb_skeleton + 20, 4); + + /* Set the total length */ + p[3] = 0x10 + len; + + err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), + 0x04, 0x40, 0x19, + 0x0000, buf, + 20 + len * 4, M5602_URB_MSG_TIMEOUT); + + return (err < 0) ? err : 0; +} + /* Dump all the registers of the m5602 bridge, unfortunately this breaks the camera until it's power cycled */ static void m5602_dump_bridge(struct sd *sd) @@ -150,11 +241,15 @@ static int m5602_start_transfer(struct gspca_dev *gspca_dev) /* Send start command to the camera */ const u8 buffer[4] = {0x13, 0xf9, 0x0f, 0x01}; + + if (sd->sensor->start) + sd->sensor->start(sd); + memcpy(buf, buffer, sizeof(buffer)); err = usb_control_msg(gspca_dev->dev, usb_sndctrlpipe(gspca_dev->dev, 0), 0x04, 0x40, 0x19, 0x0000, buf, - 4, M5602_URB_MSG_TIMEOUT); + sizeof(buffer), M5602_URB_MSG_TIMEOUT); PDEBUG(D_STREAM, "Transfer started"); return (err < 0) ? err : 0; @@ -284,6 +379,7 @@ static int __init mod_m5602_init(void) PDEBUG(D_PROBE, "registered"); return 0; } + static void __exit mod_m5602_exit(void) { usb_deregister(&sd_driver); |