/*
* Driver for the po1030 sensor
*
* Copyright (c) 2008 Erik Andrén
* Copyright (c) 2007 Ilyes Gouta. Based on the m5603x Linux Driver Project.
* Copyright (c) 2005 m5603x Linux Driver Project <m5602@x3ng.com.br>
*
* Portions of code to USB interface and ALi driver software,
* Copyright (c) 2006 Willem Duinker
* v4l2 interface modeled after the V4L2 driver
* for SN9C10x PC Camera Controllers
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation, version 2.
*
*/
#include "m5602_po1030.h"
static void po1030_dump_registers(struct sd *sd);
int po1030_probe(struct sd *sd)
{
u8 prod_id = 0, ver_id = 0, i;
if (force_sensor) {
if (force_sensor == PO1030_SENSOR) {
info("Forcing a %s sensor", po1030.name);
goto sensor_found;
}
/* If we want to force another sensor, don't try to probe this
* one */
return -ENODEV;
}
info("Probing for a po1030 sensor");
/* Run the pre-init to actually probe the unit */
for (i = 0; i < ARRAY_SIZE(preinit_po1030); i++) {
u8 data = preinit_po1030[i][2];
if (preinit_po1030[i][0] == SENSOR)
po1030_write_sensor(sd,
preinit_po1030[i][1], &data, 1);
else
m5602_write_bridge(sd, preinit_po1030[i][1], data);
}
if (po1030_read_sensor(sd, 0x3, &prod_id, 1))
return -ENODEV;
if (po1030_read_sensor(sd, 0x4, &ver_id, 1))
return -ENODEV;
if ((prod_id == 0x02) && (ver_id == 0xef)) {
info("Detected a po1030 sensor");
goto sensor_found;
}
return -ENODEV;
sensor_found:
sd->gspca_dev.cam.cam_mode = po1030.modes;
sd->gspca_dev.cam.nmodes = po1030.nmodes;
sd->desc->ctrls = po1030.ctrls;
sd->desc->nctrls = po1030.nctrls;
return 0;
}
int po1030_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 po1030_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;
/* The po1030 only supports one byte writes */
if (len > 1 || !len)
return -EINVAL;
memcpy(buf, sensor_urb_skeleton, sizeof(sensor_urb_skeleton));
buf[11] = sd->sensor->i2c_slave_id;
buf[15] = address;
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 footer */
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;
}
int po1030_init(struct sd *sd)
{
int i, err = 0;
/* Init the sensor */
for (i = 0; i < ARRAY_SIZE(init_po1030) && !err; i++) {
u8 data[2] = {0x00, 0x00};
switch (init_po1030[i][0]) {
case BRIDGE:
err = m5602_write_bridge(sd,
init_po1030[i][1],
init_po1030[i][2]);
break;
case SENSOR:
data[0] = init_po1030[i][2];
err = po1030_write_sensor(sd,
init_po1030[i][1], data, 1);
break;
case SENSOR_LONG:
data[0] = init_po1030[i][2];
data[1] = init_po1030[i][3];
err = po1030_write_sensor(sd,
init_po1030[i][1], data, 2);
break;
default:
info("Invalid stream command, exiting init");
return -EINVAL;
}
}
if (dump_sensor)
po1030_dump_registers(sd);
return err;
}
int po1030_get_exposure(struct gspca_dev *gspca_dev, __s32 *val)
{
struct sd *sd = (struct sd *) gspca_dev;
u8 i2c_data;
int err;
err = po1030_read_sensor(sd, PO1030_REG_INTEGLINES_H,
&i2c_data, 1);
if (err < 0)
goto out;
*val = (i2c_data << 8);
err = po1030_read_sensor(sd, PO1030_REG_INTEGLINES_M,
&i2c_data, 1);
*val |= i2c_data;
PDEBUG(D_V4L2, "Exposure read as %d", *val);
out:
return err;
}
int po1030_set_exposure(struct gspca_dev *gspca_dev, __s32 val)
{
struct sd *sd = (struct sd *) gspca_dev;
u8 i2c_data;
int err;
PDEBUG(D_V4L2, "Set exposure to %d", val & 0xffff);
i2c_data = ((val & 0xff00) >> 8);
PDEBUG(D_V4L2, "Set exposure to high byte to 0x%x",
i2c_data);
err = po1030_write_sensor(sd, PO1030_REG_INTEGLINES_H,
&i2c_data, 1);
if (err < 0)
goto out;
i2c_data = (val & 0xff);
PDEBUG(D_V4L2, "Set exposure to low byte to 0x%x",
i2c_data);
err = po1030_write_sensor(sd, PO1030_REG_INTEGLINES_M,
&i2c_data, 1);
out:
return err;
}
int po1030_get_gain(struct gspca_dev *gspca_dev, __s32 *val)
{
struct sd *sd = (struct sd *) gspca_dev;
u8 i2c_data;
int err;
err = po1030_read_sensor(sd, PO1030_REG_GLOBALGAIN,
&i2c_data, 1);
*val = i2c_data;
PDEBUG(D_V4L2, "Read global gain %d", *val);
return err;
}
int po1030_get_hflip(struct gspca_dev *gspca_dev, __s32 *val)
{
struct sd *sd = (struct sd *) gspca_dev;
u8 i2c_data;
int err;
err = po1030_read_sensor(sd, PO1030_REG_CONTROL2,
&i2c_data, 1);
*val = (i2c_data >> 7) & 0x01 ;
PDEBUG(D_V4L2, "Read hflip %d", *val);
return err;
}
int po1030_set_hflip(struct gspca_dev *gspca_dev, __s32 val)
{
struct sd *sd = (struct sd *) gspca_dev;
u8 i2c_data;
int err;
PDEBUG(D_V4L2, "Set hflip %d", val);
i2c_data = (val & 0x01) << 7;
err = po1030_write_sensor(sd, PO1030_REG_CONTROL2,
&i2c_data, 1);
return err;
}
int po1030_get_vflip(struct gspca_dev *gspca_dev, __s32 *val)
{
struct sd *sd = (struct sd *) gspca_dev;
u8 i2c_data;
int err;
err = po1030_read_sensor(sd, PO1030_REG_GLOBALGAIN,
&i2c_data, 1);
*val = (i2c_data >> 6) & 0x01;
PDEBUG(D_V4L2, "Read vflip %d", *val);
return err;
}
int po1030_set_vflip(struct gspca_dev *gspca_dev, __s32 val)
{
struct sd *sd = (struct sd *) gspca_dev;
u8 i2c_data;
int err;
PDEBUG(D_V4L2, "Set vflip %d", val);
i2c_data = (val & 0x01) << 6;
err = po1030_write_sensor(sd, PO1030_REG_CONTROL2,
&i2c_data, 1);
return err;
}
int po1030_set_gain(struct gspca_dev *gspca_dev, __s32 val)
{
struct sd *sd = (struct sd *) gspca_dev;
u8 i2c_data;
int err;
i2c_data = val & 0xff;
PDEBUG(D_V4L2, "Set global gain to %d", i2c_data);
err = po1030_write_sensor(sd, PO1030_REG_GLOBALGAIN,
&i2c_data, 1);
return err;
}
int po1030_get_red_balance(struct gspca_dev *gspca_dev, __s32 *val)
{
struct sd *sd = (struct sd *) gspca_dev;
u8 i2c_data;
int err;
err = po1030_read_sensor(sd, PO1030_REG_RED_GAIN,
&i2c_data, 1);
*val = i2c_data;
PDEBUG(D_V4L2, "Read red gain %d", *val);
return err;
}
int po1030_set_red_balance(struct gspca_dev *gspca_dev, __s32 val)
{
struct sd *sd = (struct sd *) gspca_dev;
u8 i2c_data;
int err;
i2c_data = val & 0xff;
PDEBUG(D_V4L2, "Set red gain to %d", i2c_data);
err = po1030_write_sensor(sd, PO1030_REG_RED_GAIN,
&i2c_data, 1);
return err;
}
int po1030_get_blue_balance(struct gspca_dev *gspca_dev, __s32 *val)
{
struct sd *sd = (struct sd *) gspca_dev;
u8 i2c_data;
int err;
err = po1030_read_sensor(sd, PO1030_REG_BLUE_GAIN,
&i2c_data, 1);
*val = i2c_data;
PDEBUG(D_V4L2, "Read blue gain %d", *val);
return err;
}
int po1030_set_blue_balance(struct gspca_dev *gspca_dev, __s32 val)
{
struct sd *sd = (struct sd *) gspca_dev;
u8 i2c_data;
int err;
i2c_data = val & 0xff;
PDEBUG(D_V4L2, "Set blue gain to %d", i2c_data);
err = po1030_write_sensor(sd, PO1030_REG_BLUE_GAIN,
&i2c_data, 1);
return err;
}
int po1030_power_down(struct sd *sd)
{
return 0;
}
static void po1030_dump_registers(struct sd *sd)
{
int address;
u8 value = 0;
info("Dumping the po1030 sensor core registers");
for (address = 0; address < 0x7f; address++) {
po1030_read_sensor(sd, address, &value, 1);
info("register 0x%x contains 0x%x",
address, value);
}
info("po1030 register state dump complete");
info("Probing for which registers that are read/write");
for (address = 0; address < 0xff; address++) {
u8 old_value, ctrl_value;
u8 test_value[2] = {0xff, 0xff};
po1030_read_sensor(sd, address, &old_value, 1);
po1030_write_sensor(sd, address, test_value, 1);
po1030_read_sensor(sd, address, &ctrl_value, 1);
if (ctrl_value == test_value[0])
info("register 0x%x is writeable", address);
else
info("register 0x%x is read only", address);
/* Restore original value */
po1030_write_sensor(sd, address, &old_value, 1);
}
}
