/*
* Driver for the ov9650 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_ov9650.h"
/* Vertically and horizontally flips the image if matched, needed for machines
where the sensor is mounted upside down */
static
const
struct dmi_system_id ov9650_flip_dmi_table[] = {
{
.ident = "ASUS A6VC",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."),
DMI_MATCH(DMI_PRODUCT_NAME, "A6VC")
}
},
{
.ident = "ASUS A6VM",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."),
DMI_MATCH(DMI_PRODUCT_NAME, "A6VM")
}
},
{
.ident = "ASUS A6JC",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."),
DMI_MATCH(DMI_PRODUCT_NAME, "A6JC")
}
},
{
.ident = "ASUS A6Ja",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."),
DMI_MATCH(DMI_PRODUCT_NAME, "A6J")
}
},
{
.ident = "ASUS A6Kt",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."),
DMI_MATCH(DMI_PRODUCT_NAME, "A6Kt")
}
},
{ }
};
static void ov9650_dump_registers(struct sd *sd);
int ov9650_read_sensor(struct sd *sd, const u8 address,
u8 *i2c_data, const u8 len)
{
int err, i;
/* The ov9650 registers have a max depth of one byte */
if (len > 1 || !len)
return -EINVAL;
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,
ov9650.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);
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 < 0) ? err : 0;
}
int ov9650_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 ov9650 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;
/* Special case larger sensor writes */
p = buf + 16;
/* Copy a four byte sequence for each byte to write over the I2C bus */
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;
}
int ov9650_probe(struct sd *sd)
{
u8 prod_id = 0, ver_id = 0, i;
if (force_sensor) {
if (force_sensor == OV9650_SENSOR) {
info("Forcing an %s sensor", ov9650.name);
goto sensor_found;
}
/* If we want to force another sensor,
don't try to probe this one */
return -ENODEV;
}
info("Probing for an ov9650 sensor");
/* Run the pre-init to actually probe the unit */
for (i = 0; i < ARRAY_SIZE(preinit_ov9650); i++) {
u8 data = preinit_ov9650[i][2];
if (preinit_ov9650[i][0] == SENSOR)
ov9650_write_sensor(sd,
preinit_ov9650[i][1], &data, 1);
else
m5602_write_bridge(sd, preinit_ov9650[i][1], data);
}
if (ov9650_read_sensor(sd, OV9650_PID, &prod_id, 1))
return -ENODEV;
if (ov9650_read_sensor(sd, OV9650_VER, &ver_id, 1))
return -ENODEV;
if ((prod_id == 0x96) && (ver_id == 0x52)) {
info("Detected an ov9650 sensor");
goto sensor_found;
}
return -ENODEV;
sensor_found:
sd->gspca_dev.cam.cam_mode = ov9650.modes;
sd->gspca_dev.cam.nmodes = ov9650.nmodes;
sd->desc->ctrls = ov9650.ctrls;
sd->desc->nctrls = ov9650.nctrls;
return 0;
}
int ov9650_init(struct sd *sd)
{
int i, err = 0;
u8 data;
if (dump_sensor)
ov9650_dump_registers(sd);
for (i = 0; i < ARRAY_SIZE(init_ov9650) && !err; i++) {
data = init_ov9650[i][2];
if (init_ov9650[i][0] == SENSOR)
err = ov9650_write_sensor(sd, init_ov9650[i][1],
&data, 1);
else
err = m5602_write_bridge(sd, init_ov9650[i][1], data);
}
if (dmi_check_system(ov9650_flip_dmi_table) && !err) {
info("vflip quirk active");
data = 0x30;
err = ov9650_write_sensor(sd, OV9650_MVFP, &data, 1);
}
return err;
}
int ov9650_power_down(struct sd *sd)
{
int i, err = 0;
for (i = 0; i < ARRAY_SIZE(power_down_ov9650) && !err; i++) {
u8 data = power_down_ov9650[i][2];
if (power_down_ov9650[i][0] == SENSOR)
err = ov9650_write_sensor(sd,
power_down_ov9650[i][1], &data, 1);
else
err = m5602_write_bridge(sd, power_down_ov9650[i][1],
data);
}
return err;
}
int ov9650_get_exposure(struct gspca_dev *gspca_dev, __s32 *val)
{
struct sd *sd = (struct sd *) gspca_dev;
u8 i2c_data;
int err;
err = ov9650_read_sensor(sd, OV9650_COM1, &i2c_data, 1);
if (err < 0)
goto out;
*val = i2c_data & 0x03;
err = ov9650_read_sensor(sd, OV9650_AECH, &i2c_data, 1);
if (err < 0)
goto out;
*val |= (i2c_data << 2);
err = ov9650_read_sensor(sd, OV9650_AECHM, &i2c_data, 1);
if (err < 0)
goto out;
*val |= (i2c_data & 0x3f) << 10;
PDEBUG(D_V4L2, "Read exposure %d", *val);
out:
return err;
}
int ov9650_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);
/* The 6 MSBs */
i2c_data = (val >> 10) & 0x3f;
err = ov9650_write_sensor(sd, OV9650_AECHM,
&i2c_data, 1);
if (err < 0)
goto out;
/* The 8 middle bits */
i2c_data = (val >> 2) & 0xff;
err = ov9650_write_sensor(sd, OV9650_AECH,
&i2c_data, 1);
if (err < 0)
goto out;
/* The 2 LSBs */
i2c_data = val & 0x03;
err = ov9650_write_sensor(sd, OV9650_COM1, &i2c_data, 1);
out:
return err;
}
int ov9650_get_gain(struct gspca_dev *gspca_dev, __s32 *val)
{
int err;
u8 i2c_data;
struct sd *sd = (struct sd *) gspca_dev;
ov9650_read_sensor(sd, OV9650_VREF, &i2c_data, 1);
*val = (i2c_data & 0x03) << 8;
err = ov9650_read_sensor(sd, OV9650_GAIN, &i2c_data, 1);
*val |= i2c_data;
PDEBUG(D_V4L2, "Read gain %d", *val);
return err;
}
int ov9650_set_gain(struct gspca_dev *gspca_dev, __s32 val)
{
int err;
u8 i2c_data;
struct sd *sd = (struct sd *) gspca_dev;
/* The 2 MSB */
/* Read the OV9650_VREF register first to avoid
corrupting the VREF high and low bits */
ov9650_read_sensor(sd, OV9650_VREF, &i2c_data, 1);
/* Mask away all uninteresting bits */
i2c_data = ((val & 0x0300) >> 2) |
(i2c_data & 0x3F);
err = ov9650_write_sensor(sd, OV9650_VREF, &i2c_data, 1);
/* The 8 LSBs */
i2c_data = val & 0xff;
err = ov9650_write_sensor(sd, OV9650_GAIN, &i2c_data, 1);
return err;
}
int ov9650_get_red_balance(struct gspca_dev *gspca_dev, __s32 *val)
{
int err;
u8 i2c_data;
struct sd *sd = (struct sd *) gspca_dev;
err = ov9650_read_sensor(sd, OV9650_RED, &i2c_data, 1);
*val = i2c_data;
PDEBUG(D_V4L2, "Read red gain %d", *val);
return err;
}
int ov9650_set_red_balance(struct gspca_dev *gspca_dev, __s32 val)
{
int err;
u8 i2c_data;
struct sd *sd = (struct sd *) gspca_dev;
PDEBUG(D_V4L2, "Set red gain to %d",
val & 0xff);
i2c_data = val & 0xff;
err = ov9650_write_sensor(sd, OV9650_RED, &i2c_data, 1);
return err;
}
int ov9650_get_blue_balance(struct gspca_dev *gspca_dev, __s32 *val)
{
int err;
u8 i2c_data;
struct sd *sd = (struct sd *) gspca_dev;
err = ov9650_read_sensor(sd, OV9650_BLUE, &i2c_data, 1);
*val = i2c_data;
PDEBUG(D_V4L2, "Read blue gain %d", *val);
return err;
}
int ov9650_set_blue_balance(struct gspca_dev *gspca_dev, __s32 val)
{
int err;
u8 i2c_data;
struct sd *sd = (struct sd *) gspca_dev;
PDEBUG(D_V4L2, "Set blue gain to %d",
val & 0xff);
i2c_data = val & 0xff;
err = ov9650_write_sensor(sd, OV9650_BLUE, &i2c_data, 1);
return err;
}
int ov9650_get_hflip(struct gspca_dev *gspca_dev, __s32 *val)
{
int err;
u8 i2c_data;
struct sd *sd = (struct sd *) gspca_dev;
err = ov9650_read_sensor(sd, OV9650_MVFP, &i2c_data, 1);
if (dmi_check_system(ov9650_flip_dmi_table))
*val = ((i2c_data & OV9650_HFLIP) >> 5) ? 0 : 1;
else
*val = (i2c_data & OV9650_HFLIP) >> 5;
PDEBUG(D_V4L2, "Read horizontal flip %d", *val);
return err;
}
int ov9650_set_hflip(struct gspca_dev *gspca_dev, __s32 val)
{
int err;
u8 i2c_data;
struct sd *sd = (struct sd *) gspca_dev;
PDEBUG(D_V4L2, "Set horizontal flip to %d", val);
err = ov9650_read_sensor(sd, OV9650_MVFP, &i2c_data, 1);
if (err < 0)
goto out;
if (dmi_check_system(ov9650_flip_dmi_table))
i2c_data = ((i2c_data & 0xdf) |
(((val ? 0 : 1) & 0x01) << 5));
else
i2c_data = ((i2c_data & 0xdf) |
((val & 0x01) << 5));
err = ov9650_write_sensor(sd, OV9650_MVFP, &i2c_data, 1);
out:
return err;
}
int ov9650_get_vflip(struct gspca_dev *gspca_dev, __s32 *val)
{
int err;
u8 i2c_data;
struct sd *sd = (struct sd *) gspca_dev;
err = ov9650_read_sensor(sd, OV9650_MVFP, &i2c_data, 1);
if (dmi_check_system(ov9650_flip_dmi_table))
*val = ((i2c_data & 0x10) >> 4) ? 0 : 1;
else
*val = (i2c_data & 0x10) >> 4;
PDEBUG(D_V4L2, "Read vertical flip %d", *val);
return err;
}
int ov9650_set_vflip(struct gspca_dev *gspca_dev, __s32 val)
{
int err;
u8 i2c_data;
struct sd *sd = (struct sd *) gspca_dev;
PDEBUG(D_V4L2, "Set vertical flip to %d", val);
err = ov9650_read_sensor(sd, OV9650_MVFP, &i2c_data, 1);
if (err < 0)
goto out;
if (dmi_check_system(ov9650_flip_dmi_table))
i2c_data = ((i2c_data & 0xef) |
(((val ? 0 : 1) & 0x01) << 4));
else
i2c_data = ((i2c_data & 0xef) |
((val & 0x01) << 4));
err = ov9650_write_sensor(sd, OV9650_MVFP, &i2c_data, 1);
out:
return err;
}
int ov9650_get_brightness(struct gspca_dev *gspca_dev, __s32 *val)
{
int err;
u8 i2c_data;
struct sd *sd = (struct sd *) gspca_dev;
err = ov9650_read_sensor(sd, OV9650_VREF, &i2c_data, 1);
if (err < 0)
goto out;
*val = (i2c_data & 0x03) << 8;
err = ov9650_read_sensor(sd, OV9650_GAIN, &i2c_data, 1);
*val |= i2c_data;
PDEBUG(D_V4L2, "Read gain %d", *val);
out:
return err;
}
int ov9650_set_brightness(struct gspca_dev *gspca_dev, __s32 val)
{
int err;
u8 i2c_data;
struct sd *sd = (struct sd *) gspca_dev;
PDEBUG(D_V4L2, "Set gain to %d", val & 0x3ff);
/* Read the OV9650_VREF register first to avoid
corrupting the VREF high and low bits */
err = ov9650_read_sensor(sd, OV9650_VREF, &i2c_data, 1);
if (err < 0)
goto out;
/* Mask away all uninteresting bits */
i2c_data = ((val & 0x0300) >> 2) | (i2c_data & 0x3F);
err = ov9650_write_sensor(sd, OV9650_VREF, &i2c_data, 1);
if (err < 0)
goto out;
/* The 8 LSBs */
i2c_data = val & 0xff;
err = ov9650_write_sensor(sd, OV9650_GAIN, &i2c_data, 1);
out:
return err;
}
int ov9650_get_auto_white_balance(struct gspca_dev *gspca_dev, __s32 *val)
{
int err;
u8 i2c_data;
struct sd *sd = (struct sd *) gspca_dev;
err = ov9650_read_sensor(sd, OV9650_COM8, &i2c_data, 1);
*val = (i2c_data & OV9650_AWB_EN) >> 1;
PDEBUG(D_V4L2, "Read auto white balance %d", *val);
return err;
}
int ov9650_set_auto_white_balance(struct gspca_dev *gspca_dev, __s32 val)
{
int err;
u8 i2c_data;
struct sd *sd = (struct sd *) gspca_dev;
PDEBUG(D_V4L2, "Set auto white balance to %d", val);
err = ov9650_read_sensor(sd, OV9650_COM8, &i2c_data, 1);
if (err < 0)
goto out;
i2c_data = ((i2c_data & 0xfd) | ((val & 0x01) << 1));
err = ov9650_write_sensor(sd, OV9650_COM8, &i2c_data, 1);
out:
return err;
}
int ov9650_get_auto_gain(struct gspca_dev *gspca_dev, __s32 *val)
{
int err;
u8 i2c_data;
struct sd *sd = (struct sd *) gspca_dev;
err = ov9650_read_sensor(sd, OV9650_COM8, &i2c_data, 1);
*val = (i2c_data & OV9650_AGC_EN) >> 2;
PDEBUG(D_V4L2, "Read auto gain control %d", *val);
return err;
}
int ov9650_set_auto_gain(struct gspca_dev *gspca_dev, __s32 val)
{
int err;
u8 i2c_data;
struct sd *sd = (struct sd *) gspca_dev;
PDEBUG(D_V4L2, "Set auto gain control to %d", val);
err = ov9650_read_sensor(sd, OV9650_COM8, &i2c_data, 1);
if (err < 0)
goto out;
i2c_data = ((i2c_data & 0xfb) | ((val & 0x01) << 2));
err = ov9650_write_sensor(sd, OV9650_COM8, &i2c_data, 1);
out:
return err;
}
static void ov9650_dump_registers(struct sd *sd)
{
int address;
info("Dumping the ov9650 register state");
for (address = 0; address < 0xa9; address++) {
u8 value;
ov9650_read_sensor(sd, address, &value, 1);
info("register 0x%x contains 0x%x",
address, value);
}
info("ov9650 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};
ov9650_read_sensor(sd, address, &old_value, 1);
ov9650_write_sensor(sd, address, test_value, 1);
ov9650_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 */
ov9650_write_sensor(sd, address, &old_value, 1);
}
}
