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|
// SPDX-License-Identifier: GPL-2.0
/*
* Support for OmniVision OV2680 1080p HD camera sensor.
*
* Copyright (c) 2013 Intel Corporation. All Rights Reserved.
* Copyright (c) 2023 Hans de Goede <hdegoede@redhat.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License version
* 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that 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.
*
*/
#include <linux/acpi.h>
#include <linux/device.h>
#include <linux/gpio/consumer.h>
#include <linux/gpio/machine.h>
#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/pm_runtime.h>
#include <linux/types.h>
#include <media/ov_16bit_addr_reg_helpers.h>
#include <media/v4l2-device.h>
#include "ov2680.h"
static int ov2680_write_reg_array(struct i2c_client *client,
const struct ov2680_reg *reglist)
{
const struct ov2680_reg *next = reglist;
int ret;
for (; next->reg != 0; next++) {
ret = ov_write_reg8(client, next->reg, next->val);
if (ret)
return ret;
}
return 0;
}
static void ov2680_set_bayer_order(struct ov2680_dev *sensor, struct v4l2_mbus_framefmt *fmt)
{
static const int ov2680_hv_flip_bayer_order[] = {
MEDIA_BUS_FMT_SBGGR10_1X10,
MEDIA_BUS_FMT_SGRBG10_1X10,
MEDIA_BUS_FMT_SGBRG10_1X10,
MEDIA_BUS_FMT_SRGGB10_1X10,
};
int hv_flip = 0;
if (sensor->ctrls.vflip->val)
hv_flip += 1;
if (sensor->ctrls.hflip->val)
hv_flip += 2;
fmt->code = ov2680_hv_flip_bayer_order[hv_flip];
}
static int ov2680_set_vflip(struct ov2680_dev *sensor, s32 val)
{
int ret;
if (sensor->is_streaming)
return -EBUSY;
ret = ov_update_reg(sensor->client, OV2680_REG_FORMAT1, BIT(2), val ? BIT(2) : 0);
if (ret < 0)
return ret;
ov2680_set_bayer_order(sensor, &sensor->mode.fmt);
return 0;
}
static int ov2680_set_hflip(struct ov2680_dev *sensor, s32 val)
{
int ret;
if (sensor->is_streaming)
return -EBUSY;
ret = ov_update_reg(sensor->client, OV2680_REG_FORMAT2, BIT(2), val ? BIT(2) : 0);
if (ret < 0)
return ret;
ov2680_set_bayer_order(sensor, &sensor->mode.fmt);
return 0;
}
static int ov2680_exposure_set(struct ov2680_dev *sensor, u32 exp)
{
return ov_write_reg24(sensor->client, OV2680_REG_EXPOSURE_PK_HIGH, exp << 4);
}
static int ov2680_gain_set(struct ov2680_dev *sensor, u32 gain)
{
return ov_write_reg16(sensor->client, OV2680_REG_GAIN_PK, gain);
}
static int ov2680_test_pattern_set(struct ov2680_dev *sensor, int value)
{
int ret;
if (!value)
return ov_update_reg(sensor->client, OV2680_REG_ISP_CTRL00, BIT(7), 0);
ret = ov_update_reg(sensor->client, OV2680_REG_ISP_CTRL00, 0x03, value - 1);
if (ret < 0)
return ret;
ret = ov_update_reg(sensor->client, OV2680_REG_ISP_CTRL00, BIT(7), BIT(7));
if (ret < 0)
return ret;
return 0;
}
static int ov2680_s_ctrl(struct v4l2_ctrl *ctrl)
{
struct v4l2_subdev *sd = ctrl_to_sd(ctrl);
struct ov2680_dev *sensor = to_ov2680_sensor(sd);
int ret;
/* Only apply changes to the controls if the device is powered up */
if (!pm_runtime_get_if_in_use(sensor->sd.dev)) {
ov2680_set_bayer_order(sensor, &sensor->mode.fmt);
return 0;
}
switch (ctrl->id) {
case V4L2_CID_VFLIP:
ret = ov2680_set_vflip(sensor, ctrl->val);
break;
case V4L2_CID_HFLIP:
ret = ov2680_set_hflip(sensor, ctrl->val);
break;
case V4L2_CID_EXPOSURE:
ret = ov2680_exposure_set(sensor, ctrl->val);
break;
case V4L2_CID_GAIN:
ret = ov2680_gain_set(sensor, ctrl->val);
break;
case V4L2_CID_TEST_PATTERN:
ret = ov2680_test_pattern_set(sensor, ctrl->val);
break;
default:
ret = -EINVAL;
}
pm_runtime_put(sensor->sd.dev);
return ret;
}
static const struct v4l2_ctrl_ops ov2680_ctrl_ops = {
.s_ctrl = ov2680_s_ctrl,
};
static int ov2680_init_registers(struct v4l2_subdev *sd)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
int ret;
ret = ov_write_reg8(client, OV2680_SW_RESET, 0x01);
ret |= ov2680_write_reg_array(client, ov2680_global_setting);
return ret;
}
static struct v4l2_mbus_framefmt *
__ov2680_get_pad_format(struct ov2680_dev *sensor,
struct v4l2_subdev_state *state,
unsigned int pad, enum v4l2_subdev_format_whence which)
{
if (which == V4L2_SUBDEV_FORMAT_TRY)
return v4l2_subdev_get_try_format(&sensor->sd, state, pad);
return &sensor->mode.fmt;
}
static void ov2680_fill_format(struct ov2680_dev *sensor,
struct v4l2_mbus_framefmt *fmt,
unsigned int width, unsigned int height)
{
memset(fmt, 0, sizeof(*fmt));
fmt->width = width;
fmt->height = height;
fmt->field = V4L2_FIELD_NONE;
ov2680_set_bayer_order(sensor, fmt);
}
static void ov2680_calc_mode(struct ov2680_dev *sensor, int width, int height)
{
int orig_width = width;
int orig_height = height;
if (width <= (OV2680_NATIVE_WIDTH / 2) &&
height <= (OV2680_NATIVE_HEIGHT / 2)) {
sensor->mode.binning = true;
width *= 2;
height *= 2;
} else {
sensor->mode.binning = false;
}
sensor->mode.h_start = ((OV2680_NATIVE_WIDTH - width) / 2) & ~1;
sensor->mode.v_start = ((OV2680_NATIVE_HEIGHT - height) / 2) & ~1;
sensor->mode.h_end = min(sensor->mode.h_start + width + OV2680_END_MARGIN - 1,
OV2680_NATIVE_WIDTH - 1);
sensor->mode.v_end = min(sensor->mode.v_start + height + OV2680_END_MARGIN - 1,
OV2680_NATIVE_HEIGHT - 1);
sensor->mode.h_output_size = orig_width;
sensor->mode.v_output_size = orig_height;
sensor->mode.hts = OV2680_PIXELS_PER_LINE;
sensor->mode.vts = OV2680_LINES_PER_FRAME;
}
static int ov2680_set_mode(struct ov2680_dev *sensor)
{
struct i2c_client *client = sensor->client;
u8 pll_div, unknown, inc, fmt1, fmt2;
int ret;
if (sensor->mode.binning) {
pll_div = 1;
unknown = 0x23;
inc = 0x31;
fmt1 = 0xc2;
fmt2 = 0x01;
} else {
pll_div = 0;
unknown = 0x21;
inc = 0x11;
fmt1 = 0xc0;
fmt2 = 0x00;
}
ret = ov_write_reg8(client, 0x3086, pll_div);
if (ret)
return ret;
ret = ov_write_reg8(client, 0x370a, unknown);
if (ret)
return ret;
ret = ov_write_reg16(client, OV2680_HORIZONTAL_START_H, sensor->mode.h_start);
if (ret)
return ret;
ret = ov_write_reg16(client, OV2680_VERTICAL_START_H, sensor->mode.v_start);
if (ret)
return ret;
ret = ov_write_reg16(client, OV2680_HORIZONTAL_END_H, sensor->mode.h_end);
if (ret)
return ret;
ret = ov_write_reg16(client, OV2680_VERTICAL_END_H, sensor->mode.v_end);
if (ret)
return ret;
ret = ov_write_reg16(client, OV2680_HORIZONTAL_OUTPUT_SIZE_H,
sensor->mode.h_output_size);
if (ret)
return ret;
ret = ov_write_reg16(client, OV2680_VERTICAL_OUTPUT_SIZE_H,
sensor->mode.v_output_size);
if (ret)
return ret;
ret = ov_write_reg16(client, OV2680_HTS, sensor->mode.hts);
if (ret)
return ret;
ret = ov_write_reg16(client, OV2680_VTS, sensor->mode.vts);
if (ret)
return ret;
ret = ov_write_reg16(client, OV2680_ISP_X_WIN, 0);
if (ret)
return ret;
ret = ov_write_reg16(client, OV2680_ISP_Y_WIN, 0);
if (ret)
return ret;
ret = ov_write_reg8(client, OV2680_X_INC, inc);
if (ret)
return ret;
ret = ov_write_reg8(client, OV2680_Y_INC, inc);
if (ret)
return ret;
ret = ov_write_reg16(client, OV2680_X_WIN, sensor->mode.h_output_size);
if (ret)
return ret;
ret = ov_write_reg16(client, OV2680_Y_WIN, sensor->mode.v_output_size);
if (ret)
return ret;
ret = ov_write_reg8(client, OV2680_REG_FORMAT1, fmt1);
if (ret)
return ret;
ret = ov_write_reg8(client, OV2680_REG_FORMAT2, fmt2);
if (ret)
return ret;
return 0;
}
static int ov2680_set_fmt(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_format *format)
{
struct ov2680_dev *sensor = to_ov2680_sensor(sd);
struct v4l2_mbus_framefmt *fmt;
unsigned int width, height;
width = min_t(unsigned int, ALIGN(format->format.width, 2), OV2680_NATIVE_WIDTH);
height = min_t(unsigned int, ALIGN(format->format.height, 2), OV2680_NATIVE_HEIGHT);
fmt = __ov2680_get_pad_format(sensor, sd_state, format->pad, format->which);
ov2680_fill_format(sensor, fmt, width, height);
format->format = *fmt;
if (format->which == V4L2_SUBDEV_FORMAT_TRY)
return 0;
mutex_lock(&sensor->lock);
ov2680_calc_mode(sensor, fmt->width, fmt->height);
mutex_unlock(&sensor->lock);
return 0;
}
static int ov2680_get_fmt(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_format *format)
{
struct ov2680_dev *sensor = to_ov2680_sensor(sd);
struct v4l2_mbus_framefmt *fmt;
fmt = __ov2680_get_pad_format(sensor, sd_state, format->pad, format->which);
format->format = *fmt;
return 0;
}
static int ov2680_detect(struct i2c_client *client)
{
struct i2c_adapter *adapter = client->adapter;
u32 high = 0, low = 0;
int ret;
u16 id;
u8 revision;
if (!i2c_check_functionality(adapter, I2C_FUNC_I2C))
return -ENODEV;
ret = ov_read_reg8(client, OV2680_SC_CMMN_CHIP_ID_H, &high);
if (ret) {
dev_err(&client->dev, "sensor_id_high read failed (%d)\n", ret);
return -ENODEV;
}
ret = ov_read_reg8(client, OV2680_SC_CMMN_CHIP_ID_L, &low);
id = ((((u16)high) << 8) | (u16)low);
if (id != OV2680_ID) {
dev_err(&client->dev, "sensor ID error 0x%x\n", id);
return -ENODEV;
}
ret = ov_read_reg8(client, OV2680_SC_CMMN_SUB_ID, &high);
revision = (u8)high & 0x0f;
dev_info(&client->dev, "sensor_revision id = 0x%x, rev= %d\n",
id, revision);
return 0;
}
static int ov2680_s_stream(struct v4l2_subdev *sd, int enable)
{
struct ov2680_dev *sensor = to_ov2680_sensor(sd);
struct i2c_client *client = v4l2_get_subdevdata(sd);
int ret = 0;
mutex_lock(&sensor->lock);
if (sensor->is_streaming == enable) {
dev_warn(&client->dev, "stream already %s\n", enable ? "started" : "stopped");
goto error_unlock;
}
if (enable) {
ret = pm_runtime_get_sync(sensor->sd.dev);
if (ret < 0)
goto error_power_down;
ret = ov2680_set_mode(sensor);
if (ret)
goto error_power_down;
/* Restore value of all ctrls */
ret = __v4l2_ctrl_handler_setup(&sensor->ctrls.handler);
if (ret)
goto error_power_down;
ret = ov_write_reg8(client, OV2680_SW_STREAM, OV2680_START_STREAMING);
if (ret)
goto error_power_down;
} else {
ov_write_reg8(client, OV2680_SW_STREAM, OV2680_STOP_STREAMING);
pm_runtime_put(sensor->sd.dev);
}
sensor->is_streaming = enable;
v4l2_ctrl_activate(sensor->ctrls.vflip, !enable);
v4l2_ctrl_activate(sensor->ctrls.hflip, !enable);
mutex_unlock(&sensor->lock);
return 0;
error_power_down:
pm_runtime_put(sensor->sd.dev);
sensor->is_streaming = false;
error_unlock:
mutex_unlock(&sensor->lock);
return ret;
}
static int ov2680_s_config(struct v4l2_subdev *sd)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
int ret;
ret = pm_runtime_get_sync(&client->dev);
if (ret < 0) {
dev_err(&client->dev, "ov2680 power-up err.\n");
goto fail_power_on;
}
/* config & detect sensor */
ret = ov2680_detect(client);
if (ret)
dev_err(&client->dev, "ov2680_detect err s_config.\n");
fail_power_on:
pm_runtime_put(&client->dev);
return ret;
}
static int ov2680_g_frame_interval(struct v4l2_subdev *sd,
struct v4l2_subdev_frame_interval *interval)
{
interval->interval.numerator = 1;
interval->interval.denominator = OV2680_FPS;
return 0;
}
static int ov2680_enum_mbus_code(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_mbus_code_enum *code)
{
/* We support only a single format */
if (code->index)
return -EINVAL;
code->code = MEDIA_BUS_FMT_SBGGR10_1X10;
return 0;
}
static int ov2680_enum_frame_size(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_frame_size_enum *fse)
{
static const struct v4l2_frmsize_discrete ov2680_frame_sizes[] = {
{ 1616, 1216 },
{ 1616, 1096 },
{ 1616, 916 },
{ 1456, 1096 },
{ 1296, 976 },
{ 1296, 736 },
{ 784, 592 },
{ 656, 496 },
};
int index = fse->index;
if (index >= ARRAY_SIZE(ov2680_frame_sizes))
return -EINVAL;
fse->min_width = ov2680_frame_sizes[index].width;
fse->min_height = ov2680_frame_sizes[index].height;
fse->max_width = ov2680_frame_sizes[index].width;
fse->max_height = ov2680_frame_sizes[index].height;
return 0;
}
static int ov2680_enum_frame_interval(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_frame_interval_enum *fie)
{
/* Only 1 framerate */
if (fie->index)
return -EINVAL;
fie->interval.numerator = 1;
fie->interval.denominator = OV2680_FPS;
return 0;
}
static int ov2680_g_skip_frames(struct v4l2_subdev *sd, u32 *frames)
{
*frames = OV2680_SKIP_FRAMES;
return 0;
}
static const struct v4l2_subdev_video_ops ov2680_video_ops = {
.s_stream = ov2680_s_stream,
.g_frame_interval = ov2680_g_frame_interval,
};
static const struct v4l2_subdev_sensor_ops ov2680_sensor_ops = {
.g_skip_frames = ov2680_g_skip_frames,
};
static const struct v4l2_subdev_pad_ops ov2680_pad_ops = {
.enum_mbus_code = ov2680_enum_mbus_code,
.enum_frame_size = ov2680_enum_frame_size,
.enum_frame_interval = ov2680_enum_frame_interval,
.get_fmt = ov2680_get_fmt,
.set_fmt = ov2680_set_fmt,
};
static const struct v4l2_subdev_ops ov2680_ops = {
.video = &ov2680_video_ops,
.pad = &ov2680_pad_ops,
.sensor = &ov2680_sensor_ops,
};
static int ov2680_init_controls(struct ov2680_dev *sensor)
{
static const char * const test_pattern_menu[] = {
"Disabled",
"Color Bars",
"Random Data",
"Square",
"Black Image",
};
const struct v4l2_ctrl_ops *ops = &ov2680_ctrl_ops;
struct ov2680_ctrls *ctrls = &sensor->ctrls;
struct v4l2_ctrl_handler *hdl = &ctrls->handler;
int exp_max = OV2680_LINES_PER_FRAME - OV2680_INTEGRATION_TIME_MARGIN;
v4l2_ctrl_handler_init(hdl, 4);
hdl->lock = &sensor->lock;
ctrls->hflip = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_HFLIP, 0, 1, 1, 0);
ctrls->vflip = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_VFLIP, 0, 1, 1, 0);
ctrls->exposure = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_EXPOSURE,
0, exp_max, 1, exp_max);
ctrls->gain = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_GAIN, 0, 1023, 1, 250);
ctrls->test_pattern =
v4l2_ctrl_new_std_menu_items(hdl,
&ov2680_ctrl_ops, V4L2_CID_TEST_PATTERN,
ARRAY_SIZE(test_pattern_menu) - 1,
0, 0, test_pattern_menu);
ctrls->hflip->flags |= V4L2_CTRL_FLAG_MODIFY_LAYOUT;
ctrls->vflip->flags |= V4L2_CTRL_FLAG_MODIFY_LAYOUT;
if (hdl->error)
return hdl->error;
sensor->sd.ctrl_handler = hdl;
return 0;
}
static void ov2680_remove(struct i2c_client *client)
{
struct v4l2_subdev *sd = i2c_get_clientdata(client);
struct ov2680_dev *sensor = to_ov2680_sensor(sd);
dev_dbg(&client->dev, "ov2680_remove...\n");
v4l2_async_unregister_subdev(&sensor->sd);
media_entity_cleanup(&sensor->sd.entity);
v4l2_ctrl_handler_free(&sensor->ctrls.handler);
mutex_destroy(&sensor->lock);
fwnode_handle_put(sensor->ep_fwnode);
pm_runtime_disable(&client->dev);
}
static int ov2680_probe(struct i2c_client *client)
{
struct device *dev = &client->dev;
struct ov2680_dev *sensor;
int ret;
sensor = devm_kzalloc(dev, sizeof(*sensor), GFP_KERNEL);
if (!sensor)
return -ENOMEM;
mutex_init(&sensor->lock);
sensor->client = client;
v4l2_i2c_subdev_init(&sensor->sd, client, &ov2680_ops);
/*
* Sometimes the fwnode graph is initialized by the bridge driver.
* Bridge drivers doing this may also add GPIO mappings, wait for this.
*/
sensor->ep_fwnode = fwnode_graph_get_next_endpoint(dev_fwnode(dev), NULL);
if (!sensor->ep_fwnode)
return dev_err_probe(dev, -EPROBE_DEFER, "waiting for fwnode graph endpoint\n");
sensor->powerdown = devm_gpiod_get_optional(dev, "powerdown", GPIOD_OUT_HIGH);
if (IS_ERR(sensor->powerdown)) {
fwnode_handle_put(sensor->ep_fwnode);
return dev_err_probe(dev, PTR_ERR(sensor->powerdown), "getting powerdown GPIO\n");
}
pm_runtime_set_suspended(dev);
pm_runtime_enable(dev);
pm_runtime_set_autosuspend_delay(dev, 1000);
pm_runtime_use_autosuspend(dev);
ret = ov2680_s_config(&sensor->sd);
if (ret) {
ov2680_remove(client);
return ret;
}
sensor->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
sensor->pad.flags = MEDIA_PAD_FL_SOURCE;
sensor->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR;
sensor->sd.fwnode = sensor->ep_fwnode;
ret = ov2680_init_controls(sensor);
if (ret) {
ov2680_remove(client);
return ret;
}
ret = media_entity_pads_init(&sensor->sd.entity, 1, &sensor->pad);
if (ret) {
ov2680_remove(client);
return ret;
}
ov2680_fill_format(sensor, &sensor->mode.fmt, OV2680_NATIVE_WIDTH, OV2680_NATIVE_HEIGHT);
ret = v4l2_async_register_subdev_sensor(&sensor->sd);
if (ret) {
ov2680_remove(client);
return ret;
}
return 0;
}
static int ov2680_suspend(struct device *dev)
{
struct v4l2_subdev *sd = dev_get_drvdata(dev);
struct ov2680_dev *sensor = to_ov2680_sensor(sd);
gpiod_set_value_cansleep(sensor->powerdown, 1);
return 0;
}
static int ov2680_resume(struct device *dev)
{
struct v4l2_subdev *sd = dev_get_drvdata(dev);
struct ov2680_dev *sensor = to_ov2680_sensor(sd);
/* according to DS, at least 5ms is needed after DOVDD (enabled by ACPI) */
usleep_range(5000, 6000);
gpiod_set_value_cansleep(sensor->powerdown, 0);
/* according to DS, 20ms is needed between PWDN and i2c access */
msleep(20);
ov2680_init_registers(sd);
return 0;
}
static DEFINE_RUNTIME_DEV_PM_OPS(ov2680_pm_ops, ov2680_suspend, ov2680_resume, NULL);
static const struct acpi_device_id ov2680_acpi_match[] = {
{"XXOV2680"},
{"OVTI2680"},
{},
};
MODULE_DEVICE_TABLE(acpi, ov2680_acpi_match);
static struct i2c_driver ov2680_driver = {
.driver = {
.name = "ov2680",
.pm = pm_sleep_ptr(&ov2680_pm_ops),
.acpi_match_table = ov2680_acpi_match,
},
.probe = ov2680_probe,
.remove = ov2680_remove,
};
module_i2c_driver(ov2680_driver);
MODULE_AUTHOR("Jacky Wang <Jacky_wang@ovt.com>");
MODULE_DESCRIPTION("A low-level driver for OmniVision 2680 sensors");
MODULE_LICENSE("GPL");
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