/*
* Driver for the mt9m111 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_mt9m111.h"
static void mt9m111_dump_registers(struct sd *sd);
int mt9m111_probe(struct sd *sd)
{
u8 data[2] = {0x00, 0x00};
int i;
if (force_sensor) {
if (force_sensor == MT9M111_SENSOR) {
info("Forcing a %s sensor", mt9m111.name);
goto sensor_found;
}
/* If we want to force another sensor, don't try to probe this
* one */
return -ENODEV;
}
info("Probing for a mt9m111 sensor");
/* Do the preinit */
for (i = 0; i < ARRAY_SIZE(preinit_mt9m111); i++) {
if (preinit_mt9m111[i][0] == BRIDGE) {
m5602_write_bridge(sd,
preinit_mt9m111[i][1],
preinit_mt9m111[i][2]);
} else {
data[0] = preinit_mt9m111[i][2];
data[1] = preinit_mt9m111[i][3];
mt9m111_write_sensor(sd,
preinit_mt9m111[i][1], data, 2);
}
}
if (mt9m111_read_sensor(sd, MT9M111_SC_CHIPVER, data, 2))
return -ENODEV;
if ((data[0] == 0x14) && (data[1] == 0x3a)) {
info("Detected a mt9m111 sensor");
goto sensor_found;
}
return -ENODEV;
sensor_found:
sd->gspca_dev.cam.cam_mode = mt9m111.modes;
sd->gspca_dev.cam.nmodes = mt9m111.nmodes;
sd->desc->ctrls = mt9m111.ctrls;
sd->desc->nctrls = mt9m111.nctrls;
return 0;
}
int mt9m111_init(struct sd *sd)
{
int i, err = 0;
/* Init the sensor */
for (i = 0; i < ARRAY_SIZE(init_mt9m111) && !err; i++) {
u8 data[2];
if (init_mt9m111[i][0] == BRIDGE) {
err = m5602_write_bridge(sd,
init_mt9m111[i][1],
init_mt9m111[i][2]);
} else {
data[0] = init_mt9m111[i][2];
data[1] = init_mt9m111[i][3];
err = mt9m111_write_sensor(sd,
init_mt9m111[i][1], data, 2);
}
}
if (dump_sensor)
mt9m111_dump_registers(sd);
return (err < 0) ? err : 0;
}
int mt9m111_power_down(struct sd *sd)
{
return 0;
}
int mt9m111_get_vflip(struct gspca_dev *gspca_dev, __s32 *val)
{
int err;
u8 data[2] = {0x00, 0x00};
struct sd *sd = (struct sd *) gspca_dev;
err = mt9m111_read_sensor(sd, MT9M111_SC_R_MODE_CONTEXT_B,
data, 2);
*val = data[0] & MT9M111_RMB_MIRROR_ROWS;
PDEBUG(D_V4L2, "Read vertical flip %d", *val);
return err;
}
int mt9m111_set_vflip(struct gspca_dev *gspca_dev, __s32 val)
{
int err;
u8 data[2] = {0x00, 0x00};
struct sd *sd = (struct sd *) gspca_dev;
PDEBUG(D_V4L2, "Set vertical flip to %d", val);
/* Set the correct page map */
err = mt9m111_write_sensor(sd, MT9M111_PAGE_MAP, data, 2);
if (err < 0)
goto out;
err = mt9m111_read_sensor(sd, MT9M111_SC_R_MODE_CONTEXT_B, data, 2);
if (err < 0)
goto out;
data[0] = (data[0] & 0xfe) | val;
err = mt9m111_write_sensor(sd, MT9M111_SC_R_MODE_CONTEXT_B,
data, 2);
out:
return err;
}
int mt9m111_get_hflip(struct gspca_dev *gspca_dev, __s32 *val)
{
int err;
u8 data[2] = {0x00, 0x00};
struct sd *sd = (struct sd *) gspca_dev;
err = mt9m111_read_sensor(sd, MT9M111_SC_R_MODE_CONTEXT_B,
data, 2);
*val = data[0] & MT9M111_RMB_MIRROR_COLS;
PDEBUG(D_V4L2, "Read horizontal flip %d", *val);
return err;
}
int mt9m111_set_hflip(struct gspca_dev *gspca_dev, __s32 val)
{
int err;
u8 data[2] = {0x00, 0x00};
struct sd *sd = (struct sd *) gspca_dev;
PDEBUG(D_V4L2, "Set horizontal flip to %d", val);
/* Set the correct page map */
err = mt9m111_write_sensor(sd, MT9M111_PAGE_MAP, data, 2);
if (err < 0)
goto out;
err = mt9m111_read_sensor(sd, MT9M111_SC_R_MODE_CONTEXT_B, data, 2);
if (err < 0)
goto out;
data[0] = (data[0] & 0xfd) | ((val << 1) & 0x02);
err = mt9m111_write_sensor(sd, MT9M111_SC_R_MODE_CONTEXT_B,
data, 2);
out:
return err;
}
int mt9m111_get_gain(struct gspca_dev *gspca_dev, __s32 *val)
{
int err, tmp;
u8 data[2] = {0x00, 0x00};
struct sd *sd = (struct sd *) gspca_dev;
err = mt9m111_read_sensor(sd, MT9M111_SC_GLOBAL_GAIN, data, 2);
tmp = ((data[1] << 8) | data[0]);
*val = ((tmp & (1 << 10)) * 2) |
((tmp & (1 << 9)) * 2) |
((tmp & (1 << 8)) * 2) |
(tmp & 0x7f);
PDEBUG(D_V4L2, "Read gain %d", *val);
return err;
}
int mt9m111_set_gain(struct gspca_dev *gspca_dev, __s32 val)
{
int err, tmp;
u8 data[2] = {0x00, 0x00};
struct sd *sd = (struct sd *) gspca_dev;
/* Set the correct page map */
err = mt9m111_write_sensor(sd, MT9M111_PAGE_MAP, data, 2);
if (err < 0)
goto out;
if (val >= INITIAL_MAX_GAIN * 2 * 2 * 2)
return -EINVAL;
if ((val >= INITIAL_MAX_GAIN * 2 * 2) &&
(val < (INITIAL_MAX_GAIN - 1) * 2 * 2 * 2))
tmp = (1 << 10) | (val << 9) |
(val << 8) | (val / 8);
else if ((val >= INITIAL_MAX_GAIN * 2) &&
(val < INITIAL_MAX_GAIN * 2 * 2))
tmp = (1 << 9) | (1 << 8) | (val / 4);
else if ((val >= INITIAL_MAX_GAIN) &&
(val < INITIAL_MAX_GAIN * 2))
tmp = (1 << 8) | (val / 2);
else
tmp = val;
data[1] = (tmp & 0xff00) >> 8;
data[0] = (tmp & 0xff);
PDEBUG(D_V4L2, "tmp=%d, data[1]=%d, data[0]=%d", tmp,
data[1], data[0]);
err = mt9m111_write_sensor(sd, MT9M111_SC_GLOBAL_GAIN,
data, 2);
out:
return err;
}
int mt9m111_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);
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;
err = m5602_write_bridge(sd, M5602_XB_I2C_CTRL, 0x1a);
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 contains 0x%x ", address, *i2c_data);
}
out:
return err;
}
int mt9m111_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, nor with 0 :p*/
if (len > 2 || !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 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;
}
static void mt9m111_dump_registers(struct sd *sd)
{
u8 address, value[2] = {0x00, 0x00};
info("Dumping the mt9m111 register state");
info("Dumping the mt9m111 sensor core registers");
value[1] = MT9M111_SENSOR_CORE;
mt9m111_write_sensor(sd, MT9M111_PAGE_MAP, value, 2);
for (address = 0; address < 0xff; address++) {
mt9m111_read_sensor(sd, address, value, 2);
info("register 0x%x contains 0x%x%x",
address, value[0], value[1]);
}
info("Dumping the mt9m111 color pipeline registers");
value[1] = MT9M111_COLORPIPE;
mt9m111_write_sensor(sd, MT9M111_PAGE_MAP, value, 2);
for (address = 0; address < 0xff; address++) {
mt9m111_read_sensor(sd, address, value, 2);
info("register 0x%x contains 0x%x%x",
address, value[0], value[1]);
}
info("Dumping the mt9m111 camera control registers");
value[1] = MT9M111_CAMERA_CONTROL;
mt9m111_write_sensor(sd, MT9M111_PAGE_MAP, value, 2);
for (address = 0; address < 0xff; address++) {
mt9m111_read_sensor(sd, address, value, 2);
info("register 0x%x contains 0x%x%x",
address, value[0], value[1]);
}
info("mt9m111 register state dump complete");
}
