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tegrakernel/kernel/nvidia/drivers/media/i2c/ov9281.c

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initial commit tegra kernel 32.6.1
2022-02-16 09:13:02 -06:00
/*
* ov9281.c - ov9281 sensor driver
*
* Copyright (c) 2016-2018, NVIDIA CORPORATION. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <linux/slab.h>
#include <linux/uaccess.h>
#include <linux/gpio.h>
#include <linux/module.h>
#include <linux/seq_file.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/of_gpio.h>
#include <media/tegra_v4l2_camera.h>
#include <media/tegra-v4l2-camera.h>
#include <media/camera_common.h>
#include "ov9281_mode_tbls.h"
/* OV9281 Registers */
#define OV9281_SC_MODE_SELECT_ADDR 0x0100
#define OV9281_SC_MODE_SELECT_STREAMING 0x01
#define OV9281_SC_CHIP_ID_HIGH_ADDR 0x300A
#define OV9281_SC_CHIP_ID_LOW_ADDR 0x300B
#define OV9281_SC_CTRL_SCCB_ID_ADDR 0x302B
#define OV9281_SC_CTRL_3B_ADDR 0x303B
#define OV9281_SC_CTRL_3B_SCCB_ID2_NACK_EN (1 << 0)
#define OV9281_SC_CTRL_3B_SCCB_PGM_ID_EN (1 << 1)
#define OV9281_GROUP_HOLD_ADDR 0x3208
#define OV9281_GROUP_HOLD_START 0x00
#define OV9281_GROUP_HOLD_END 0x10
#define OV9281_GROUP_HOLD_LAUNCH_LBLANK 0x60
#define OV9281_GROUP_HOLD_LAUNCH_VBLANK 0xA0
#define OV9281_GROUP_HOLD_LAUNCH_IMMED 0xE0
#define OV9281_GROUP_HOLD_BANK_0 0x00
#define OV9281_GROUP_HOLD_BANK_1 0x01
#define OV9281_EXPO_HIGH_ADDR 0x3500
#define OV9281_EXPO_MID_ADDR 0x3501
#define OV9281_EXPO_LOW_ADDR 0x3502
#define OV9281_GAIN_SHIFT_ADDR 0x3507
#define OV9281_GAIN_HIGH_ADDR 0x3508
#define OV9281_GAIN_LOW_ADDR 0x3509
#define OV9281_TIMING_VTS_HIGH_ADDR 0x380E
#define OV9281_TIMING_VTS_LOW_ADDR 0x380F
#define OV9281_TIMING_FORMAT1 0x3820
#define OV9281_TIMING_FORMAT1_VBIN (1 << 1)
#define OV9281_TIMING_FORMAT1_FLIP (1 << 2)
#define OV9281_TIMING_FORMAT2 0x3821
#define OV9281_TIMING_FORMAT2_HBIN (1 << 0)
#define OV9281_TIMING_FORMAT2_MIRROR (1 << 2)
#define OV9281_TIMING_RST_FSIN_HIGH_ADDR 0x3826
#define OV9281_TIMING_RST_FSIN_LOW_ADDR 0x3827
#define OV9281_OTP_BUFFER_ADDR 0x3D00
#define OV9281_OTP_BUFFER_SIZE 32
#define OV9281_OTP_STR_SIZE (OV9281_OTP_BUFFER_SIZE * 2)
#define OV9281_FUSE_ID_OTP_BUFFER_ADDR 0x3D00
#define OV9281_FUSE_ID_OTP_BUFFER_SIZE 16
#define OV9281_FUSE_ID_STR_SIZE (OV9281_FUSE_ID_OTP_BUFFER_SIZE * 2)
#define OV9281_OTP_PROGRAM_CTRL_ADDR 0x3D80
#define OV9281_OTP_LOAD_CTRL_ADDR 0x3D81
#define OV9281_OTP_LOAD_CTRL_OTP_RD 0x01
#define OV9281_PRE_CTRL00_ADDR 0x5E00
#define OV9281_PRE_CTRL00_TEST_PATTERN_EN (1 << 7)
/* OV9281 Other Stuffs */
#define OV9281_DEFAULT_GAIN 0x0010 /* 1.0x real gain */
#define OV9281_MIN_GAIN 0x0001
#define OV9281_MAX_GAIN 0x1FFF
#define OV9281_DEFAULT_FRAME_LENGTH 0x071C
#define OV9281_MIN_FRAME_LENGTH 0x0001
#define OV9281_MAX_FRAME_LENGTH 0xFFFF
#define OV9281_FRAME_LENGTH_1SEC (0x40d * 120) /* TODO: try to calc */
#define OV9281_MIN_EXPOSURE_COARSE 0x00000001
#define OV9281_MAX_EXPOSURE_COARSE 0x000FFFFF
#define OV9281_DEFAULT_EXPOSURE_COARSE 0x00002A90
#define OV9281_MAX_WIDTH 1280
#define OV9281_MAX_HEIGHT 800
#define OV9281_DEFAULT_MODE OV9281_MODE_1280X800
#define OV9281_DEFAULT_WIDTH OV9281_MAX_WIDTH
#define OV9281_DEFAULT_HEIGHT OV9281_MAX_HEIGHT
#define OV9281_DEFAULT_DATAFMT MEDIA_BUS_FMT_SBGGR10_1X10
#define OV9281_DEFAULT_CLK_FREQ 26000000
#define OV9281_DEFAULT_I2C_ADDRESS_C0 (0xc0 >> 1)
#define OV9281_DEFAULT_I2C_ADDRESS_20 (0x20 >> 1)
#define OV9281_DEFAULT_I2C_ADDRESS_PROGRAMMABLE (0xe0 >> 1)
struct ov9281 {
struct camera_common_power_rail power;
int num_ctrls;
int fsync;
int cam_sid_gpio;
int mcu_boot_gpio;
int mcu_reset_gpio;
bool mirror;
bool flip;
struct v4l2_ctrl_handler ctrl_handler;
struct i2c_client *i2c_client;
struct v4l2_subdev *subdev;
struct media_pad pad;
s32 group_hold_prev;
bool group_hold_en;
int frame_period_ms;
struct regmap *regmap;
struct camera_common_data *s_data;
struct camera_common_pdata *pdata;
struct v4l2_ctrl *ctrls[];
};
/* Register/regmap stuff */
static int ov9281_read_reg(struct camera_common_data *s_data, u16 addr, u8 *val)
{
struct ov9281 *priv = (struct ov9281 *)s_data->priv;
unsigned int temp_val;
int err;
err = regmap_read(priv->regmap, addr, &temp_val);
if (!err)
*val = temp_val;
return err;
}
static int ov9281_write_reg(struct camera_common_data *s_data, u16 addr, u8 val)
{
struct ov9281 *priv = (struct ov9281 *)s_data->priv;
struct device *dev = &priv->i2c_client->dev;
int err;
err = regmap_write(priv->regmap, addr, val);
if (err)
dev_err(dev, "%s: i2c write failed, %x = %x\n",
__func__, addr, val);
return err;
}
static int ov9281_write_table(struct ov9281 *priv, const ov9281_reg table[])
{
return regmap_util_write_table_8(priv->regmap, table, NULL, 0,
OV9281_TABLE_WAIT_MS,
OV9281_TABLE_END);
}
static const struct regmap_config ov9281_regmap_config = {
.reg_bits = 16,
.val_bits = 8,
.cache_type = REGCACHE_RBTREE,
.use_single_rw = true,
};
static int ov9281_i2c_addr_assign(struct ov9281 *priv, u8 i2c_addr)
{
struct device *dev = &priv->i2c_client->dev;
struct i2c_msg msg;
unsigned char data[3];
int err = 0;
/*
* It seems that the way SID works for the OV9281 I2C slave address is
* that:
*
* SID 0 = 0xc0, 0xe0
* SID 1 = 0x20, 0xe0
*
* Address 0xe0 is programmable via register 0x302B
* (OV9281_SC_CTRL_SCCB_ID_ADDR).
*
* So, the scheme to assign addresses to an (almost) arbitrary
* number of sensors is to consider 0x20 to be the "off" address.
* Start each sensor with SID as 1 so that they appear to be off.
*
* Then, to assign an address to one sensor:
*
* 0. Set corresponding SID to 0 (now only that sensor responds
* to 0xc0).
* 1. Use 0xc0 to program the address from the default programmable
* address of 0xe0 to the new address.
* 2. Set corresponding SID back to 1 (so it no longer responds
* to 0xc0).
*/
if (i2c_addr == OV9281_DEFAULT_I2C_ADDRESS_C0) {
dev_info(dev, "Using default I2C address 0x%02x\n", i2c_addr);
if (gpio_is_valid(priv->cam_sid_gpio)) {
gpio_set_value(priv->cam_sid_gpio, 0);
msleep_range(1);
}
return 0;
} else if (i2c_addr == OV9281_DEFAULT_I2C_ADDRESS_20) {
dev_info(dev, "Using default I2C address 0x%02x\n", i2c_addr);
if (gpio_is_valid(priv->cam_sid_gpio)) {
gpio_set_value(priv->cam_sid_gpio, 1);
msleep_range(1);
}
return 0;
} else if (i2c_addr == OV9281_DEFAULT_I2C_ADDRESS_PROGRAMMABLE) {
dev_info(dev, "Using default I2C address 0x%02x\n", i2c_addr);
return 0;
}
/*
* From this point on, we are trying to program the programmable
* slave address. We necessarily need to have a cam-sid-gpio for this.
*/
if (!gpio_is_valid(priv->cam_sid_gpio)) {
dev_err(dev, "Missing cam-sid-gpio, cannot program I2C addr\n");
return -EINVAL;
}
gpio_set_value(priv->cam_sid_gpio, 0);
msleep_range(1);
/*
* Have to make the I2C message manually because we are using a
* different I2C slave address for this transaction, rather than
* the one in the device tree for this device.
*/
data[0] = (OV9281_SC_CTRL_SCCB_ID_ADDR >> 8) & 0xff;
data[1] = OV9281_SC_CTRL_SCCB_ID_ADDR & 0xff;
data[2] = ((i2c_addr) << 1) & 0xff;
/*
* Use the programmable default I2C slave address so that if we have
* multiple sensors of this same kind, when we change one sensor's
* address, the next sensor address change message won't go to that
* same sensor.
*/
msg.addr = OV9281_DEFAULT_I2C_ADDRESS_C0;
msg.flags = 0;
msg.len = 3;
msg.buf = data;
if (i2c_transfer(priv->i2c_client->adapter, &msg, 1) != 1) {
dev_err(dev, "Error assigning I2C address to 0x%02x\n",
i2c_addr);
err = -EIO;
}
gpio_set_value(priv->cam_sid_gpio, 1);
msleep_range(1);
return err;
}
/* NVIDIA camera_common stuff */
static int ov9281_power_on(struct camera_common_data *s_data)
{
struct ov9281 *priv = (struct ov9281 *)s_data->priv;
struct camera_common_power_rail *pw = &priv->power;
struct device *dev = &priv->i2c_client->dev;
int err;
dev_dbg(dev, "%s: power on\n", __func__);
if (priv->pdata->power_on) {
err = priv->pdata->power_on(pw);
if (err)
dev_err(dev, "%s failed.\n", __func__);
else
pw->state = SWITCH_ON;
return err;
}
if (pw->avdd) {
err = regulator_enable(pw->avdd);
if (err)
goto avdd_fail;
}
if (pw->dvdd) {
err = regulator_enable(pw->dvdd);
if (err)
goto dvdd_fail;
}
if (pw->iovdd) {
err = regulator_enable(pw->iovdd);
if (err)
goto iovdd_fail;
}
usleep_range(5350, 5360);
err = ov9281_i2c_addr_assign(priv, priv->i2c_client->addr);
if (err)
goto addr_assign_fail;
pw->state = SWITCH_ON;
return 0;
addr_assign_fail:
if (pw->iovdd)
regulator_disable(pw->iovdd);
iovdd_fail:
if (pw->dvdd)
regulator_disable(pw->dvdd);
dvdd_fail:
if (pw->avdd)
regulator_disable(pw->avdd);
avdd_fail:
dev_err(dev, "%s failed.\n", __func__);
return -ENODEV;
}
static int ov9281_power_off(struct camera_common_data *s_data)
{
struct ov9281 *priv = (struct ov9281 *)s_data->priv;
struct camera_common_power_rail *pw = &priv->power;
struct device *dev = &priv->i2c_client->dev;
int err = 0;
dev_dbg(dev, "%s: power off\n", __func__);
ov9281_write_table(priv, ov9281_mode_table[OV9281_MODE_STOP_STREAM]);
if (priv->pdata->power_off) {
err = priv->pdata->power_off(pw);
if (err)
dev_err(dev, "%s failed.\n", __func__);
else
goto power_off_done;
}
if (pw->iovdd)
regulator_disable(pw->iovdd);
if (pw->dvdd)
regulator_disable(pw->dvdd);
if (pw->avdd)
regulator_disable(pw->avdd);
return err;
power_off_done:
pw->state = SWITCH_OFF;
return 0;
}
static int ov9281_power_put(struct ov9281 *priv)
{
return 0;
}
static int ov9281_power_get(struct ov9281 *priv)
{
struct camera_common_power_rail *pw = &priv->power;
struct camera_common_pdata *pdata = priv->pdata;
struct device *dev = &priv->i2c_client->dev;
const char *mclk_name;
int err = 0;
mclk_name = priv->pdata->mclk_name ?
priv->pdata->mclk_name : "cam_mclk1";
pw->mclk = devm_clk_get(&priv->i2c_client->dev, mclk_name);
if (IS_ERR(pw->mclk)) {
dev_err(dev, "unable to get clock %s\n", mclk_name);
return PTR_ERR(pw->mclk);
}
if (priv->pdata->regulators.avdd) {
err = camera_common_regulator_get(dev,
&pw->avdd, pdata->regulators.avdd);
if (err) {
dev_err(dev, "unable to get regulator %s, err = %d\n",
pdata->regulators.avdd, err);
goto done;
}
}
if (priv->pdata->regulators.dvdd) {
err = camera_common_regulator_get(dev,
&pw->dvdd, pdata->regulators.dvdd);
if (err) {
dev_err(dev, "unable to get regulator %s, err = %d\n",
pdata->regulators.dvdd, err);
goto done;
}
}
if (priv->pdata->regulators.iovdd) {
err = camera_common_regulator_get(dev,
&pw->iovdd, pdata->regulators.iovdd);
if (err) {
dev_err(dev, "unable to get regulator %s, err = %d\n",
pdata->regulators.iovdd, err);
goto done;
}
}
done:
pw->state = SWITCH_OFF;
return 0;
}
static struct camera_common_sensor_ops ov9281_common_ops = {
.power_on = ov9281_power_on,
.power_off = ov9281_power_off,
.write_reg = ov9281_write_reg,
.read_reg = ov9281_read_reg,
};
/* Miscellaneous OV9281-specific stuff */
static int ov9281_set_group_hold(struct ov9281 *priv)
{
struct device *dev = &priv->i2c_client->dev;
int gh_prev = switch_ctrl_qmenu[priv->group_hold_prev];
int err;
if (priv->group_hold_en == true && gh_prev == SWITCH_OFF) {
/* group hold start */
err = ov9281_write_reg(priv->s_data, OV9281_GROUP_HOLD_ADDR,
(OV9281_GROUP_HOLD_START |
OV9281_GROUP_HOLD_BANK_0));
if (err)
goto fail;
priv->group_hold_prev = 1;
} else if (priv->group_hold_en == false && gh_prev == SWITCH_ON) {
/* group hold end */
err = ov9281_write_reg(priv->s_data, OV9281_GROUP_HOLD_ADDR,
(OV9281_GROUP_HOLD_END |
OV9281_GROUP_HOLD_BANK_0));
/* quick launch */
err |= ov9281_write_reg(priv->s_data,
OV9281_GROUP_HOLD_ADDR,
(OV9281_GROUP_HOLD_LAUNCH_VBLANK |
OV9281_GROUP_HOLD_BANK_0));
if (err)
goto fail;
priv->group_hold_prev = 0;
}
return 0;
fail:
dev_dbg(dev, "%s: Group hold control error\n", __func__);
return err;
}
static int ov9281_set_gain(struct ov9281 *priv, s32 val)
{
struct device *dev = &priv->i2c_client->dev;
ov9281_reg regs[4];
u16 gain;
int err;
if (val < OV9281_MIN_GAIN)
gain = OV9281_MIN_GAIN;
else if (val > OV9281_MAX_GAIN)
gain = OV9281_MAX_GAIN;
else
gain = val;
dev_dbg(dev, "%s: gain: %d\n", __func__, gain);
regs[0].addr = OV9281_GAIN_SHIFT_ADDR;
regs[0].val = 0x03;
regs[1].addr = OV9281_GAIN_HIGH_ADDR;
regs[1].val = gain >> 8;
regs[2].addr = OV9281_GAIN_LOW_ADDR;
regs[2].val = gain & 0xff;
regs[3].addr = OV9281_TABLE_END;
regs[3].val = 0;
ov9281_set_group_hold(priv);
err = ov9281_write_table(priv, regs);
if (err)
goto fail;
return 0;
fail:
dev_dbg(dev, "%s: GAIN control error\n", __func__);
return err;
}
static int ov9281_set_frame_length(struct ov9281 *priv, s32 val)
{
struct device *dev = &priv->i2c_client->dev;
ov9281_reg regs[5];
u16 frame_length;
int err;
frame_length = (u16)val;
dev_dbg(dev, "%s: frame_length: %d\n", __func__, frame_length);
regs[0].addr = OV9281_TIMING_VTS_HIGH_ADDR;
regs[0].val = (frame_length >> 8) & 0xff;
regs[1].addr = OV9281_TIMING_VTS_LOW_ADDR;
regs[1].val = (frame_length) & 0xff;
regs[2].addr = OV9281_TABLE_END;
regs[2].val = 0;
if (priv->fsync == OV9281_FSYNC_SLAVE) {
regs[2].addr = OV9281_TIMING_RST_FSIN_HIGH_ADDR;
regs[2].val = ((frame_length - 4) >> 8) & 0xff;
regs[3].addr = OV9281_TIMING_RST_FSIN_LOW_ADDR;
regs[3].val = (frame_length - 4) & 0xff;
regs[4].addr = OV9281_TABLE_END;
regs[4].val = 0;
}
ov9281_set_group_hold(priv);
err = ov9281_write_table(priv, regs);
if (err)
goto fail;
priv->frame_period_ms = (frame_length * 1000) /
OV9281_FRAME_LENGTH_1SEC;
dev_dbg(dev, "%s: frame_period_ms: %d\n",
__func__, priv->frame_period_ms);
return 0;
fail:
dev_dbg(dev, "%s: FRAME_LENGTH control error\n", __func__);
return err;
}
static int ov9281_set_coarse_time(struct ov9281 *priv, s32 val)
{
struct device *dev = &priv->i2c_client->dev;
ov9281_reg regs[4];
u32 coarse_time;
int err;
coarse_time = (u32)val;
dev_dbg(dev, "%s: coarse_time: %d\n", __func__, coarse_time);
regs[0].addr = OV9281_EXPO_HIGH_ADDR;
regs[0].val = (coarse_time >> 16) & 0xff;
regs[1].addr = OV9281_EXPO_MID_ADDR;
regs[1].val = (coarse_time >> 8) & 0xff;
regs[2].addr = OV9281_EXPO_LOW_ADDR;
regs[2].val = (coarse_time & 0xff);
regs[3].addr = OV9281_TABLE_END;
regs[3].val = 0;
ov9281_set_group_hold(priv);
err = ov9281_write_table(priv, regs);
if (err)
goto fail;
return 0;
fail:
dev_dbg(dev, "%s: COARSE_TIME control error\n", __func__);
return err;
}
/* OTP stuff */
static int ov9281_read_otp(struct ov9281 *priv, u8 *buf, u16 addr, int size)
{
int i;
int err;
err = ov9281_write_reg(priv->s_data, OV9281_SC_MODE_SELECT_ADDR,
OV9281_SC_MODE_SELECT_STREAMING);
if (err)
return err;
for (i = 0; i < size; i++) {
err = ov9281_write_reg(priv->s_data, addr + i, 0x00);
if (err)
return err;
}
err = ov9281_write_reg(priv->s_data, OV9281_OTP_LOAD_CTRL_ADDR,
OV9281_OTP_LOAD_CTRL_OTP_RD);
msleep(20);
return regmap_bulk_read(priv->regmap, addr, buf, size);
}
static int ov9281_otp_setup(struct ov9281 *priv)
{
struct device *dev = &priv->i2c_client->dev;
struct v4l2_ctrl *ctrl;
u8 otp_buf[OV9281_OTP_BUFFER_SIZE];
int i;
int err;
err = ov9281_read_otp(priv, otp_buf, OV9281_OTP_BUFFER_ADDR,
OV9281_OTP_BUFFER_SIZE);
if (err)
return err;
ctrl = v4l2_ctrl_find(&priv->ctrl_handler, TEGRA_CAMERA_CID_OTP_DATA);
if (!ctrl) {
dev_err(dev, "could not find device ctrl.\n");
return -EINVAL;
}
for (i = 0; i < OV9281_OTP_BUFFER_SIZE; i++)
sprintf(&ctrl->p_new.p_char[i*2], "%02x", otp_buf[i]);
ctrl->p_cur.p_char = ctrl->p_new.p_char;
return 0;
}
static int ov9281_fuse_id_setup(struct ov9281 *priv)
{
struct device *dev = &priv->i2c_client->dev;
struct v4l2_ctrl *ctrl;
u8 fuse_id[OV9281_FUSE_ID_OTP_BUFFER_SIZE];
int i;
int err;
err = ov9281_read_otp(priv, fuse_id, OV9281_FUSE_ID_OTP_BUFFER_ADDR,
OV9281_FUSE_ID_OTP_BUFFER_SIZE);
if (err)
return err;
ctrl = v4l2_ctrl_find(&priv->ctrl_handler, TEGRA_CAMERA_CID_FUSE_ID);
if (!ctrl) {
dev_err(dev, "could not find device ctrl.\n");
return -EINVAL;
}
for (i = 0; i < OV9281_FUSE_ID_OTP_BUFFER_SIZE; i++)
sprintf(&ctrl->p_new.p_char[i*2], "%02x", fuse_id[i]);
ctrl->p_cur.p_char = ctrl->p_new.p_char;
return 0;
}
/* V4L2 subdev stuff */
static int ov9281_s_stream(struct v4l2_subdev *sd, int enable)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
struct device *dev = &client->dev;
struct camera_common_data *s_data = to_camera_common_data(dev);
struct ov9281 *priv = (struct ov9281 *)s_data->priv;
struct v4l2_control control;
int err;
if (!enable) {
dev_dbg(dev, "%s: stream off\n", __func__);
return ov9281_write_table(priv,
ov9281_mode_table[OV9281_MODE_STOP_STREAM]);
}
dev_dbg(dev, "%s: write mode table %d\n", __func__, s_data->mode);
err = ov9281_write_table(priv, ov9281_mode_table[s_data->mode]);
if (err)
goto exit;
if (ov9281_fsync_table[priv->fsync]) {
dev_dbg(dev, "%s: write fsync table %d\n", __func__,
priv->fsync);
err = ov9281_write_table(priv, ov9281_fsync_table[priv->fsync]);
if (err)
goto exit;
}
if ((priv->fsync == OV9281_FSYNC_SLAVE) &&
ov9281_fsync_slave_mode_table[s_data->mode]) {
dev_dbg(dev, "%s: write fsync slave mode table %d\n",
__func__, s_data->mode);
err = ov9281_write_table(
priv, ov9281_fsync_slave_mode_table[s_data->mode]);
if (err)
goto exit;
}
if (s_data->override_enable) {
/* write list of override regs for the asking frame length, */
/* coarse integration time, and gain. Failures to write */
/* overrides are non-fatal. */
control.id = TEGRA_CAMERA_CID_GAIN;
err = v4l2_g_ctrl(&priv->ctrl_handler, &control);
err |= ov9281_set_gain(priv, control.value);
if (err)
dev_warn(dev, "%s: error gain override\n", __func__);
control.id = TEGRA_CAMERA_CID_FRAME_LENGTH;
err = v4l2_g_ctrl(&priv->ctrl_handler, &control);
err |= ov9281_set_frame_length(priv, control.value);
if (err)
dev_warn(dev, "%s: error frame length override\n",
__func__);
control.id = TEGRA_CAMERA_CID_COARSE_TIME;
err = v4l2_g_ctrl(&priv->ctrl_handler, &control);
err |= ov9281_set_coarse_time(priv, control.value);
if (err)
dev_warn(dev, "%s: error coarse time override\n",
__func__);
}
/*
* Handle mirror and flip.
* Vertical and horizontal binning are in the same registers, so
* need to take frame resolution into account (to avoid a register
* read).
*/
if (priv->mirror) {
if (s_data->frmfmt->size.width > (OV9281_MAX_WIDTH / 2))
ov9281_write_reg(s_data, OV9281_TIMING_FORMAT2,
OV9281_TIMING_FORMAT2_MIRROR);
else
ov9281_write_reg(s_data, OV9281_TIMING_FORMAT2,
OV9281_TIMING_FORMAT2_HBIN |
OV9281_TIMING_FORMAT2_MIRROR);
}
if (priv->flip) {
if (s_data->frmfmt->size.height > (OV9281_MAX_HEIGHT / 2))
ov9281_write_reg(s_data, OV9281_TIMING_FORMAT1,
OV9281_TIMING_FORMAT1_FLIP);
else
ov9281_write_reg(s_data, OV9281_TIMING_FORMAT1,
OV9281_TIMING_FORMAT1_VBIN |
OV9281_TIMING_FORMAT1_FLIP);
}
#ifdef TPG
err = ov9281_write_reg(priv->s_data, OV9281_PRE_CTRL00_ADDR,
OV9281_PRE_CTRL00_TEST_PATTERN_EN);
if (err)
dev_warn(dev, "%s: error enabling TPG\n", __func__);
#endif
dev_dbg(dev, "%s: stream on\n", __func__);
err = ov9281_write_table(priv,
ov9281_mode_table[OV9281_MODE_START_STREAM]);
if (err)
goto exit;
/*
* If the sensor is in fsync slave mode, and is in the middle of
* sending a frame when it gets a strobe on the fsin pin, it may
* prematurely end the frame, resulting in a short frame on our
* camera host. So, after starting streaming, we assume fsync
* master has already been told to start streaming, and we wait some
* amount of time in order to skip the possible short frame. The
* length of time to wait should be at least our frame period.
* Add a little bit extra as a safety margin.
*/
if (priv->fsync == OV9281_FSYNC_SLAVE)
msleep_range(priv->frame_period_ms + 10);
return 0;
exit:
dev_err(dev, "%s: error setting stream\n", __func__);
return err;
}
static int ov9281_g_input_status(struct v4l2_subdev *sd, u32 *status)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
struct camera_common_data *s_data = to_camera_common_data(&client->dev);
struct ov9281 *priv = (struct ov9281 *)s_data->priv;
struct camera_common_power_rail *pw = &priv->power;
*status = pw->state == SWITCH_ON;
return 0;
}
static int ov9281_set_fmt(struct v4l2_subdev *sd,
struct v4l2_subdev_pad_config *cfg,
struct v4l2_subdev_format *format)
{
int err;
if (format->which == V4L2_SUBDEV_FORMAT_TRY)
err = camera_common_try_fmt(sd, &format->format);
else
err = camera_common_s_fmt(sd, &format->format);
return err;
}
static int ov9281_get_fmt(struct v4l2_subdev *sd,
struct v4l2_subdev_pad_config *cfg,
struct v4l2_subdev_format *format)
{
return camera_common_g_fmt(sd, &format->format);
}
static struct v4l2_subdev_core_ops ov9281_subdev_core_ops = {
.s_power = camera_common_s_power,
};
static struct v4l2_subdev_video_ops ov9281_subdev_video_ops = {
.s_stream = ov9281_s_stream,
.g_mbus_config = camera_common_g_mbus_config,
.g_input_status = ov9281_g_input_status,
};
static struct v4l2_subdev_pad_ops ov9281_subdev_pad_ops = {
.set_fmt = ov9281_set_fmt,
.get_fmt = ov9281_get_fmt,
.enum_mbus_code = camera_common_enum_mbus_code,
.enum_frame_size = camera_common_enum_framesizes,
.enum_frame_interval = camera_common_enum_frameintervals,
};
static struct v4l2_subdev_ops ov9281_subdev_ops = {
.core = &ov9281_subdev_core_ops,
.video = &ov9281_subdev_video_ops,
.pad = &ov9281_subdev_pad_ops,
};
/* V4L2 controls stuff */
static int ov9281_g_volatile_ctrl(struct v4l2_ctrl *ctrl)
{
struct ov9281 *priv =
container_of(ctrl->handler, struct ov9281, ctrl_handler);
struct device *dev = &priv->i2c_client->dev;
int err = 0;
if (priv->power.state == SWITCH_OFF)
return 0;
switch (ctrl->id) {
default:
dev_err(dev, "%s: unknown ctrl id.\n", __func__);
return -EINVAL;
}
return err;
}
static int ov9281_s_ctrl(struct v4l2_ctrl *ctrl)
{
struct ov9281 *priv =
container_of(ctrl->handler, struct ov9281, ctrl_handler);
struct device *dev = &priv->i2c_client->dev;
int err = 0;
if (priv->power.state == SWITCH_OFF)
return 0;
switch (ctrl->id) {
case TEGRA_CAMERA_CID_GAIN:
err = ov9281_set_gain(priv, ctrl->val);
break;
case TEGRA_CAMERA_CID_FRAME_LENGTH:
/*
* This is a workaround for nvbug 1865041, where setting the
* VTS timing registers when the sensor is set up for fsync
* master or slave leads to instability if streaming has
* already started.
*/
if (priv->fsync == OV9281_FSYNC_NONE)
err = ov9281_set_frame_length(priv, ctrl->val);
break;
case TEGRA_CAMERA_CID_COARSE_TIME:
err = ov9281_set_coarse_time(priv, ctrl->val);
break;
case TEGRA_CAMERA_CID_GROUP_HOLD:
if (switch_ctrl_qmenu[ctrl->val] == SWITCH_ON) {
priv->group_hold_en = true;
} else {
priv->group_hold_en = false;
err = ov9281_set_group_hold(priv);
}
break;
case TEGRA_CAMERA_CID_HDR_EN:
break;
default:
dev_err(dev, "%s: unknown ctrl id.\n", __func__);
return -EINVAL;
}
return err;
}
static const struct v4l2_ctrl_ops ov9281_ctrl_ops = {
.g_volatile_ctrl = ov9281_g_volatile_ctrl,
.s_ctrl = ov9281_s_ctrl,
};
static struct v4l2_ctrl_config ctrl_config_list[] = {
/* Do not change the name field for the controls! */
{
.ops = &ov9281_ctrl_ops,
.id = TEGRA_CAMERA_CID_GAIN,
.name = "Gain",
.type = V4L2_CTRL_TYPE_INTEGER,
.flags = V4L2_CTRL_FLAG_SLIDER,
.min = OV9281_MIN_GAIN,
.max = OV9281_MAX_GAIN,
.def = OV9281_DEFAULT_GAIN,
.step = 1,
},
{
.ops = &ov9281_ctrl_ops,
.id = TEGRA_CAMERA_CID_FRAME_LENGTH,
.name = "Frame Length",
.type = V4L2_CTRL_TYPE_INTEGER,
.flags = V4L2_CTRL_FLAG_SLIDER,
.min = OV9281_MIN_FRAME_LENGTH,
.max = OV9281_MAX_FRAME_LENGTH,
.def = OV9281_DEFAULT_FRAME_LENGTH,
.step = 1,
},
{
.ops = &ov9281_ctrl_ops,
.id = TEGRA_CAMERA_CID_COARSE_TIME,
.name = "Coarse Time",
.type = V4L2_CTRL_TYPE_INTEGER,
.flags = V4L2_CTRL_FLAG_SLIDER,
.min = OV9281_MIN_EXPOSURE_COARSE,
.max = OV9281_MAX_EXPOSURE_COARSE,
.def = OV9281_DEFAULT_EXPOSURE_COARSE,
.step = 1,
},
{
.ops = &ov9281_ctrl_ops,
.id = TEGRA_CAMERA_CID_GROUP_HOLD,
.name = "Group Hold",
.type = V4L2_CTRL_TYPE_INTEGER_MENU,
.min = 0,
.max = ARRAY_SIZE(switch_ctrl_qmenu) - 1,
.menu_skip_mask = 0,
.def = 0,
.qmenu_int = switch_ctrl_qmenu,
},
{
.ops = &ov9281_ctrl_ops,
.id = TEGRA_CAMERA_CID_HDR_EN,
.name = "HDR enable",
.type = V4L2_CTRL_TYPE_INTEGER_MENU,
.min = 0,
.max = ARRAY_SIZE(switch_ctrl_qmenu) - 1,
.menu_skip_mask = 0,
.def = 0,
.qmenu_int = switch_ctrl_qmenu,
},
{
.ops = &ov9281_ctrl_ops,
.id = TEGRA_CAMERA_CID_OTP_DATA,
.name = "OTP Data",
.type = V4L2_CTRL_TYPE_STRING,
.flags = V4L2_CTRL_FLAG_READ_ONLY,
.min = 0,
.max = OV9281_OTP_STR_SIZE,
.step = 2,
},
{
.ops = &ov9281_ctrl_ops,
.id = TEGRA_CAMERA_CID_FUSE_ID,
.name = "Fuse ID",
.type = V4L2_CTRL_TYPE_STRING,
.flags = V4L2_CTRL_FLAG_READ_ONLY,
.min = 0,
.max = OV9281_FUSE_ID_STR_SIZE,
.step = 2,
},
};
static int ov9281_ctrls_init(struct ov9281 *priv)
{
struct i2c_client *client = priv->i2c_client;
struct v4l2_ctrl *ctrl;
int num_ctrls;
int i;
int err;
dev_dbg(&client->dev, "%s++\n", __func__);
num_ctrls = ARRAY_SIZE(ctrl_config_list);
v4l2_ctrl_handler_init(&priv->ctrl_handler, num_ctrls);
for (i = 0; i < num_ctrls; i++) {
ctrl = v4l2_ctrl_new_custom(&priv->ctrl_handler,
&ctrl_config_list[i], NULL);
if (ctrl == NULL) {
dev_err(&client->dev, "Failed to init %s ctrl\n",
ctrl_config_list[i].name);
continue;
}
if (ctrl_config_list[i].type == V4L2_CTRL_TYPE_STRING &&
ctrl_config_list[i].flags & V4L2_CTRL_FLAG_READ_ONLY) {
ctrl->p_new.p_char = devm_kzalloc(&client->dev,
ctrl_config_list[i].max + 1, GFP_KERNEL);
}
priv->ctrls[i] = ctrl;
}
priv->num_ctrls = num_ctrls;
priv->subdev->ctrl_handler = &priv->ctrl_handler;
if (priv->ctrl_handler.error) {
dev_err(&client->dev, "Error %d adding controls\n",
priv->ctrl_handler.error);
err = priv->ctrl_handler.error;
goto error;
}
err = v4l2_ctrl_handler_setup(&priv->ctrl_handler);
if (err) {
dev_err(&client->dev,
"Error %d setting default controls\n", err);
goto error;
}
return 0;
error:
v4l2_ctrl_handler_free(&priv->ctrl_handler);
return err;
}
static const struct media_entity_operations ov9281_media_ops = {
.link_validate = v4l2_subdev_link_validate,
};
/* Driver probe helper stuff */
static int ov9281_parse_dt(struct i2c_client *client, struct ov9281 *priv)
{
struct device_node *np = client->dev.of_node;
const char *fsync_str;
int gpio;
int err;
err = of_property_read_string(np, "mclk", &priv->pdata->mclk_name);
if (err) {
dev_err(&client->dev, "mclk not in DT\n");
return -EINVAL;
}
err = of_property_read_string(np, "fsync", &fsync_str);
if (!err && fsync_str && (strcmp(fsync_str, "master") == 0))
priv->fsync = OV9281_FSYNC_MASTER;
else if (!err && fsync_str && (strcmp(fsync_str, "slave") == 0))
priv->fsync = OV9281_FSYNC_SLAVE;
else
priv->fsync = OV9281_FSYNC_NONE;
gpio = of_get_named_gpio(np, "pwdn-gpios", 0);
if (!gpio_is_valid(gpio)) {
dev_dbg(&client->dev, "pwdn gpios not in DT\n");
gpio = 0;
}
priv->pdata->pwdn_gpio = (unsigned int)gpio;
gpio = of_get_named_gpio(np, "reset-gpios", 0);
if (!gpio_is_valid(gpio)) {
dev_dbg(&client->dev, "reset gpios not in DT\n");
gpio = 0;
}
priv->pdata->reset_gpio = (unsigned int)gpio;
priv->mcu_boot_gpio =
of_get_named_gpio(np, "mcu-boot-gpios", 0);
priv->mcu_reset_gpio =
of_get_named_gpio(np, "mcu-reset-gpios", 0);
priv->cam_sid_gpio = of_get_named_gpio(np, "cam-sid-gpios", 0);
priv->mirror = of_property_read_bool(np, "mirror");
priv->flip = of_property_read_bool(np, "flip");
err = of_property_read_string(np, "avdd-reg",
&priv->pdata->regulators.avdd);
if (err)
dev_warn(&client->dev, "avdd-reg not in DT\n");
err = of_property_read_string(np, "dvdd-reg",
&priv->pdata->regulators.dvdd);
if (err)
dev_warn(&client->dev, "dvdd-reg not in DT\n");
err = of_property_read_string(np, "iovdd-reg",
&priv->pdata->regulators.iovdd);
if (err)
dev_warn(&client->dev, "iovdd-reg not in DT\n");
return 0;
}
static int ov9281_verify_chip_id(struct ov9281 *priv)
{
struct i2c_client *client = priv->i2c_client;
struct camera_common_data *s_data = priv->s_data;
u8 chip_id_hi, chip_id_lo;
u16 chip_id;
int err;
err = ov9281_read_reg(s_data, OV9281_SC_CHIP_ID_HIGH_ADDR, &chip_id_hi);
if (err) {
dev_err(&client->dev, "Failed to read chip ID\n");
return err;
}
err = ov9281_read_reg(s_data, OV9281_SC_CHIP_ID_LOW_ADDR, &chip_id_lo);
if (err) {
dev_err(&client->dev, "Failed to read chip ID\n");
return err;
}
chip_id = (chip_id_hi << 8) | chip_id_lo;
if (chip_id != 0x9281) {
dev_err(&client->dev, "Read unknown chip ID 0x%04x\n", chip_id);
return -EINVAL;
}
return 0;
}
static const struct of_device_id ov9281_of_match[] = {
{ .compatible = "nvidia,ov9281", },
{ },
};
MODULE_DEVICE_TABLE(of, ov9281_of_match);
static int ov9281_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct camera_common_data *common_data;
struct device *dev = &client->dev;
struct ov9281 *priv;
int err;
dev_info(dev, "probing v4l2 sensor.\n");
common_data = devm_kzalloc(dev, sizeof(*common_data), GFP_KERNEL);
priv = devm_kzalloc(dev,
sizeof(struct ov9281) +
(sizeof(struct v4l2_ctrl *) *
ARRAY_SIZE(ctrl_config_list)),
GFP_KERNEL);
if (!priv) {
dev_err(dev, "unable to allocate camera_common_data\n");
return -ENOMEM;
}
priv->regmap = devm_regmap_init_i2c(client, &ov9281_regmap_config);
if (IS_ERR(priv->regmap)) {
dev_err(dev, "regmap init failed %ld\n", PTR_ERR(priv->regmap));
return -ENODEV;
}
priv->pdata = devm_kzalloc(dev, sizeof(struct camera_common_pdata),
GFP_KERNEL);
if (!priv->pdata) {
dev_err(dev, "unable to allocate camera_common_pdata\n");
return -ENOMEM;
}
err = ov9281_parse_dt(client, priv);
if (err)
return err;
common_data->ops = &ov9281_common_ops;
common_data->ctrl_handler = &priv->ctrl_handler;
common_data->dev = &client->dev;
common_data->frmfmt = ov9281_frmfmt;
common_data->colorfmt =
camera_common_find_datafmt(OV9281_DEFAULT_DATAFMT);
common_data->power = &priv->power;
common_data->ctrls = priv->ctrls;
common_data->priv = (void *)priv;
common_data->numctrls = ARRAY_SIZE(ctrl_config_list);
common_data->numfmts = ARRAY_SIZE(ov9281_frmfmt);
common_data->def_mode = OV9281_DEFAULT_MODE;
common_data->def_width = OV9281_DEFAULT_WIDTH;
common_data->def_height = OV9281_DEFAULT_HEIGHT;
common_data->def_clk_freq = OV9281_DEFAULT_CLK_FREQ;
common_data->fmt_width = common_data->def_width;
common_data->fmt_height = common_data->def_height;
priv->i2c_client = client;
priv->s_data = common_data;
priv->subdev = &common_data->subdev;
priv->subdev->dev = &client->dev;
priv->group_hold_prev = 0;
err = ov9281_power_get(priv);
if (err)
return err;
/*
* If our device tree node is given MCU GPIOs, then we are expected to
* reset the MCU.
*/
if (gpio_is_valid(priv->mcu_boot_gpio) &&
gpio_is_valid(priv->mcu_reset_gpio)) {
dev_info(dev, "Resetting MCU\n");
gpio_set_value(priv->mcu_boot_gpio, 0);
gpio_set_value(priv->mcu_reset_gpio, 0);
msleep_range(1);
gpio_set_value(priv->mcu_reset_gpio, 1);
}
err = camera_common_initialize(common_data, "ov9281");
if (err) {
dev_err(dev, "Failed to initialize ov9281\n");
return err;
}
v4l2_i2c_subdev_init(&common_data->subdev, client,
&ov9281_subdev_ops);
err = ov9281_ctrls_init(priv);
if (err)
return err;
err = camera_common_s_power(priv->subdev, true);
if (err)
return -ENODEV;
err = ov9281_verify_chip_id(priv);
if (err)
goto error;
err = ov9281_otp_setup(priv);
if (err) {
dev_err(dev, "Error %d reading otp data\n", err);
return err;
}
err = ov9281_fuse_id_setup(priv);
if (err) {
dev_err(dev, "Error %d reading fuse id data\n", err);
return err;
}
priv->subdev->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE |
V4L2_SUBDEV_FL_HAS_EVENTS;
#if defined(CONFIG_MEDIA_CONTROLLER)
priv->pad.flags = MEDIA_PAD_FL_SOURCE;
priv->subdev->entity.ops = &ov9281_media_ops;
err = tegra_media_entity_init(&priv->subdev->entity, 1,
&priv->pad, true, true);
if (err < 0) {
dev_err(dev, "unable to init media entity\n");
return err;
}
#endif
err = v4l2_async_register_subdev(priv->subdev);
if (err)
return err;
dev_info(dev, "Probed v4l2 sensor.\n");
camera_common_s_power(priv->subdev, false);
return 0;
error:
camera_common_s_power(priv->subdev, false);
return err;
}
static int
ov9281_remove(struct i2c_client *client)
{
struct camera_common_data *s_data = to_camera_common_data(&client->dev);
struct ov9281 *priv = (struct ov9281 *)s_data->priv;
v4l2_async_unregister_subdev(priv->subdev);
#if defined(CONFIG_MEDIA_CONTROLLER)
media_entity_cleanup(&priv->subdev->entity);
#endif
v4l2_ctrl_handler_free(&priv->ctrl_handler);
ov9281_power_put(priv);
camera_common_remove_debugfs(s_data);
return 0;
}
static const struct i2c_device_id ov9281_id[] = {
{ "ov9281", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, ov9281_id);
static struct i2c_driver ov9281_i2c_driver = {
.driver = {
.name = "ov9281",
.owner = THIS_MODULE,
.of_match_table = of_match_ptr(ov9281_of_match),
},
.probe = ov9281_probe,
.remove = ov9281_remove,
.id_table = ov9281_id,
};
module_i2c_driver(ov9281_i2c_driver);
MODULE_DESCRIPTION("SoC Camera driver for Omnivison OV9281");
MODULE_AUTHOR("NVIDIA Corporation");
MODULE_LICENSE("GPL v2");