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|
/*
* Driver for the s5k4aa sensor
*
* Copyright (C) 2008 Erik Andren
* 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_s5k4aa.h"
int s5k4aa_probe(struct sd *sd)
{
u8 prod_id[6] = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
const u8 expected_prod_id[6] = {0x00, 0x10, 0x00, 0x4b, 0x33, 0x75};
int i, err = 0;
if (force_sensor) {
if (force_sensor == S5K4AA_SENSOR) {
info("Forcing a %s sensor", s5k4aa.name);
goto sensor_found;
}
/* If we want to force another sensor, don't try to probe this
* one */
return -ENODEV;
}
info("Probing for a s5k4aa sensor");
/* Preinit the sensor */
for (i = 0; i < ARRAY_SIZE(preinit_s5k4aa) && !err; i++) {
u8 data[2] = {0x00, 0x00};
switch (preinit_s5k4aa[i][0]) {
case BRIDGE:
err = m5602_write_bridge(sd,
preinit_s5k4aa[i][1],
preinit_s5k4aa[i][2]);
break;
case SENSOR:
data[0] = preinit_s5k4aa[i][2];
err = s5k4aa_write_sensor(sd,
preinit_s5k4aa[i][1],
data, 1);
break;
case SENSOR_LONG:
data[0] = preinit_s5k4aa[i][2];
data[1] = preinit_s5k4aa[i][3];
err = s5k4aa_write_sensor(sd,
preinit_s5k4aa[i][1],
data, 2);
break;
default:
info("Invalid stream command, exiting init");
return -EINVAL;
}
}
/* Test some registers, but we don't know their exact meaning yet */
if (s5k4aa_read_sensor(sd, 0x00, prod_id, sizeof(prod_id)))
return -ENODEV;
if (memcmp(prod_id, expected_prod_id, sizeof(prod_id)))
return -ENODEV;
else
info("Detected a s5k4aa sensor");
sensor_found:
sd->gspca_dev.cam.cam_mode = s5k4aa.modes;
sd->gspca_dev.cam.nmodes = s5k4aa.nmodes;
sd->desc->ctrls = s5k4aa.ctrls;
sd->desc->nctrls = s5k4aa.nctrls;
return 0;
}
int s5k4aa_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, 0x18 + len);
if (err < 0)
goto out;
do {
err = m5602_read_bridge(sd, M5602_XB_I2C_STATUS, i2c_data);
} while ((*i2c_data & I2C_BUSY) && !err);
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(DBG_TRACE, "Reading sensor register "
"0x%x containing 0x%x ", address, *i2c_data);
}
out:
return (err < 0) ? err : 0;
}
int s5k4aa_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 > 2 || !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(DBG_TRACE, "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;
}
int s5k4aa_init(struct sd *sd)
{
int i, err = 0;
for (i = 0; i < ARRAY_SIZE(init_s5k4aa) && !err; i++) {
u8 data[2] = {0x00, 0x00};
switch (init_s5k4aa[i][0]) {
case BRIDGE:
err = m5602_write_bridge(sd,
init_s5k4aa[i][1],
init_s5k4aa[i][2]);
break;
case SENSOR:
data[0] = init_s5k4aa[i][2];
err = s5k4aa_write_sensor(sd,
init_s5k4aa[i][1], data, 1);
break;
case SENSOR_LONG:
data[0] = init_s5k4aa[i][2];
data[1] = init_s5k4aa[i][3];
err = s5k4aa_write_sensor(sd,
init_s5k4aa[i][1], data, 2);
break;
default:
info("Invalid stream command, exiting init");
return -EINVAL;
}
}
if (dump_sensor)
s5k4aa_dump_registers(sd);
if (!err && dmi_check_system(s5k4aa_vflip_dmi_table)) {
u8 data = 0x02;
info("vertical flip quirk active");
s5k4aa_write_sensor(sd, S5K4AA_PAGE_MAP, &data, 1);
s5k4aa_read_sensor(sd, S5K4AA_READ_MODE, &data, 1);
data |= S5K4AA_RM_V_FLIP;
data &= ~S5K4AA_RM_H_FLIP;
s5k4aa_write_sensor(sd, S5K4AA_READ_MODE, &data, 1);
/* Decrement COLSTART to preserve color order (BGGR) */
s5k4aa_read_sensor(sd, S5K4AA_COLSTART_LO, &data, 1);
data--;
s5k4aa_write_sensor(sd, S5K4AA_COLSTART_LO, &data, 1);
/* Increment ROWSTART to preserve color order (BGGR) */
s5k4aa_read_sensor(sd, S5K4AA_ROWSTART_LO, &data, 1);
data++;
s5k4aa_write_sensor(sd, S5K4AA_ROWSTART_LO, &data, 1);
}
return (err < 0) ? err : 0;
}
int s5k4aa_power_down(struct sd *sd)
{
return 0;
}
int s5k4aa_get_exposure(struct gspca_dev *gspca_dev, __s32 *val)
{
struct sd *sd = (struct sd *) gspca_dev;
u8 data = S5K4AA_PAGE_MAP_2;
int err;
err = s5k4aa_write_sensor(sd, S5K4AA_PAGE_MAP, &data, 1);
if (err < 0)
goto out;
err = s5k4aa_read_sensor(sd, S5K4AA_EXPOSURE_HI, &data, 1);
if (err < 0)
goto out;
*val = data << 8;
err = s5k4aa_read_sensor(sd, S5K4AA_EXPOSURE_LO, &data, 1);
*val |= data;
PDEBUG(DBG_V4L2_CID, "Read exposure %d", *val);
out:
return (err < 0) ? err : 0;
}
int s5k4aa_set_exposure(struct gspca_dev *gspca_dev, __s32 val)
{
struct sd *sd = (struct sd *) gspca_dev;
u8 data = S5K4AA_PAGE_MAP_2;
int err;
PDEBUG(DBG_V4L2_CID, "Set exposure to %d", val);
err = s5k4aa_write_sensor(sd, S5K4AA_PAGE_MAP, &data, 1);
if (err < 0)
goto out;
data = (val >> 8) & 0xff;
err = s5k4aa_write_sensor(sd, S5K4AA_EXPOSURE_HI, &data, 1);
if (err < 0)
goto out;
data = val & 0xff;
err = s5k4aa_write_sensor(sd, S5K4AA_EXPOSURE_LO, &data, 1);
out:
return (err < 0) ? err : 0;
}
int s5k4aa_get_vflip(struct gspca_dev *gspca_dev, __s32 *val)
{
struct sd *sd = (struct sd *) gspca_dev;
u8 data = S5K4AA_PAGE_MAP_2;
int err;
err = s5k4aa_write_sensor(sd, S5K4AA_PAGE_MAP, &data, 1);
if (err < 0)
goto out;
err = s5k4aa_read_sensor(sd, S5K4AA_PAGE_MAP, &data, 1);
*val = (data & S5K4AA_RM_V_FLIP) >> 7;
PDEBUG(DBG_V4L2_CID, "Read vertical flip %d", *val);
out:
return (err < 0) ? err : 0;
}
int s5k4aa_set_vflip(struct gspca_dev *gspca_dev, __s32 val)
{
struct sd *sd = (struct sd *) gspca_dev;
u8 data = S5K4AA_PAGE_MAP_2;
int err;
PDEBUG(DBG_V4L2_CID, "Set vertical flip to %d", val);
err = s5k4aa_write_sensor(sd, S5K4AA_PAGE_MAP, &data, 1);
if (err < 0)
goto out;
err = s5k4aa_write_sensor(sd, S5K4AA_READ_MODE, &data, 1);
if (err < 0)
goto out;
data = ((data & ~S5K4AA_RM_V_FLIP)
| ((val & 0x01) << 7));
err = s5k4aa_write_sensor(sd, S5K4AA_READ_MODE, &data, 1);
if (err < 0)
goto out;
if (val) {
err = s5k4aa_read_sensor(sd, S5K4AA_ROWSTART_LO, &data, 1);
if (err < 0)
goto out;
data++;
err = s5k4aa_write_sensor(sd, S5K4AA_ROWSTART_LO, &data, 1);
} else {
err = s5k4aa_read_sensor(sd, S5K4AA_ROWSTART_LO, &data, 1);
if (err < 0)
goto out;
data--;
err = s5k4aa_write_sensor(sd, S5K4AA_ROWSTART_LO, &data, 1);
}
out:
return (err < 0) ? err : 0;
}
int s5k4aa_get_hflip(struct gspca_dev *gspca_dev, __s32 *val)
{
struct sd *sd = (struct sd *) gspca_dev;
u8 data = S5K4AA_PAGE_MAP_2;
int err;
err = s5k4aa_write_sensor(sd, S5K4AA_PAGE_MAP, &data, 1);
if (err < 0)
goto out;
err = s5k4aa_read_sensor(sd, S5K4AA_PAGE_MAP, &data, 1);
*val = (data & S5K4AA_RM_H_FLIP) >> 6;
PDEBUG(DBG_V4L2_CID, "Read horizontal flip %d", *val);
out:
return (err < 0) ? err : 0;
}
int s5k4aa_set_hflip(struct gspca_dev *gspca_dev, __s32 val)
{
struct sd *sd = (struct sd *) gspca_dev;
u8 data = S5K4AA_PAGE_MAP_2;
int err;
PDEBUG(DBG_V4L2_CID, "Set horizontal flip to %d",
val);
err = s5k4aa_write_sensor(sd, S5K4AA_PAGE_MAP, &data, 1);
if (err < 0)
goto out;
err = s5k4aa_write_sensor(sd, S5K4AA_READ_MODE, &data, 1);
if (err < 0)
goto out;
data = ((data & ~S5K4AA_RM_H_FLIP) | ((val & 0x01) << 6));
err = s5k4aa_write_sensor(sd, S5K4AA_READ_MODE, &data, 1);
if (err < 0)
goto out;
if (val) {
err = s5k4aa_read_sensor(sd, S5K4AA_COLSTART_LO, &data, 1);
if (err < 0)
goto out;
data++;
err = s5k4aa_write_sensor(sd, S5K4AA_COLSTART_LO, &data, 1);
if (err < 0)
goto out;
} else {
err = s5k4aa_read_sensor(sd, S5K4AA_COLSTART_LO, &data, 1);
if (err < 0)
goto out;
data--;
err = s5k4aa_write_sensor(sd, S5K4AA_COLSTART_LO, &data, 1);
}
out:
return (err < 0) ? err : 0;
}
int s5k4aa_get_gain(struct gspca_dev *gspca_dev, __s32 *val)
{
struct sd *sd = (struct sd *) gspca_dev;
u8 data = S5K4AA_PAGE_MAP_2;
int err;
err = s5k4aa_write_sensor(sd, S5K4AA_PAGE_MAP, &data, 1);
if (err < 0)
goto out;
err = s5k4aa_read_sensor(sd, S5K4AA_GAIN_2, &data, 1);
*val = data;
PDEBUG(DBG_V4L2_CID, "Read gain %d", *val);
out:
return (err < 0) ? err : 0;
}
int s5k4aa_set_gain(struct gspca_dev *gspca_dev, __s32 val)
{
struct sd *sd = (struct sd *) gspca_dev;
u8 data = S5K4AA_PAGE_MAP_2;
int err;
PDEBUG(DBG_V4L2_CID, "Set gain to %d", val);
err = s5k4aa_write_sensor(sd, S5K4AA_PAGE_MAP, &data, 1);
if (err < 0)
goto out;
data = val & 0xff;
err = s5k4aa_write_sensor(sd, S5K4AA_GAIN_2, &data, 1);
out:
return (err < 0) ? err : 0;
}
void s5k4aa_dump_registers(struct sd *sd)
{
int address;
u8 page, old_page;
s5k4aa_read_sensor(sd, S5K4AA_PAGE_MAP, &old_page, 1);
for (page = 0; page < 16; page++) {
s5k4aa_write_sensor(sd, S5K4AA_PAGE_MAP, &page, 1);
info("Dumping the s5k4aa register state for page 0x%x", page);
for (address = 0; address <= 0xff; address++) {
u8 value = 0;
s5k4aa_read_sensor(sd, address, &value, 1);
info("register 0x%x contains 0x%x",
address, value);
}
}
info("s5k4aa register state dump complete");
for (page = 0; page < 16; page++) {
s5k4aa_write_sensor(sd, S5K4AA_PAGE_MAP, &page, 1);
info("Probing for which registers that are "
"read/write for page 0x%x", page);
for (address = 0; address <= 0xff; address++) {
u8 old_value, ctrl_value, test_value = 0xff;
s5k4aa_read_sensor(sd, address, &old_value, 1);
s5k4aa_write_sensor(sd, address, &test_value, 1);
s5k4aa_read_sensor(sd, address, &ctrl_value, 1);
if (ctrl_value == test_value)
info("register 0x%x is writeable", address);
else
info("register 0x%x is read only", address);
/* Restore original value */
s5k4aa_write_sensor(sd, address, &old_value, 1);
}
}
info("Read/write register probing complete");
s5k4aa_write_sensor(sd, S5K4AA_PAGE_MAP, &old_page, 1);
}
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