// SPDX-License-Identifier: GPL-2.0
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/*
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* motor driver
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*
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* Copyright (C) 2020 Rockchip Electronics Co., Ltd.
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*
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*/
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//#define DEBUG
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#include <linux/io.h>
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#include <linux/of_gpio.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/device.h>
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#include <linux/fb.h>
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#include <linux/interrupt.h>
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#include <linux/kernel.h>
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#include <linux/gpio/consumer.h>
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#include <linux/of_irq.h>
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#include <linux/platform_device.h>
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#include <linux/wakelock.h>
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#include <linux/hrtimer.h>
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#include <linux/pwm.h>
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#include <linux/delay.h>
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#include <media/v4l2-subdev.h>
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#include <media/v4l2-ctrls.h>
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#include <media/v4l2-device.h>
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#include <linux/mutex.h>
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#include <linux/version.h>
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#include <linux/rk-camera-module.h>
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#include <linux/completion.h>
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#include <linux/rk_vcm_head.h>
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#define DRIVER_VERSION KERNEL_VERSION(0, 0x01, 0x00)
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#define DRIVER_NAME "hall-dc"
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#define IRIS_MAX_LOG 100
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#define IRIS_LOG_STEP 1
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#define PWM_PERIOD_DEF 333333
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struct motor_dev {
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struct v4l2_subdev sd;
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struct v4l2_ctrl_handler ctrl_handler;
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struct pwm_device *pwm;
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struct device *dev;
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struct mutex mutex;
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struct pwm_state pwm_state;
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u32 module_index;
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const char *module_facing;
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};
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static int motor_dev_parse_dt(struct motor_dev *motor)
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{
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struct device_node *node = motor->dev->of_node;
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int ret = 0;
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int error = 0;
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motor->pwm = devm_pwm_get(motor->dev, NULL);
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if (IS_ERR(motor->pwm)) {
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error = PTR_ERR(motor->pwm);
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if (error != -EPROBE_DEFER)
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dev_err(motor->dev, "Failed to request PWM device: %d\n", error);
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return error;
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}
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if (motor->pwm && motor->pwm->args.period != 0) {
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motor->pwm_state.period = motor->pwm->args.period;
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motor->pwm_state.polarity = motor->pwm->args.polarity;
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} else {
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motor->pwm_state.period = PWM_PERIOD_DEF;
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motor->pwm_state.polarity = 0;
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}
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ret = of_property_read_u32(node, RKMODULE_CAMERA_MODULE_INDEX,
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&motor->module_index);
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ret |= of_property_read_string(node, RKMODULE_CAMERA_MODULE_FACING,
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&motor->module_facing);
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if (ret) {
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dev_err(motor->dev,
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"could not get module information!\n");
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return -EINVAL;
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}
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return 0;
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}
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static int motor_s_ctrl(struct v4l2_ctrl *ctrl)
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{
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int ret = 0;
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struct motor_dev *motor = container_of(ctrl->handler,
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struct motor_dev, ctrl_handler);
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switch (ctrl->id) {
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case V4L2_CID_IRIS_ABSOLUTE:
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motor->pwm_state.enabled = true;
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motor->pwm_state.duty_cycle =
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div64_u64((u64)motor->pwm_state.period * ctrl->val, IRIS_MAX_LOG);
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pwm_apply_state(motor->pwm, &motor->pwm_state);
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dev_dbg(motor->dev, "iris, ctrl->val %d, pwm duty %lld, period %lld, polarity %d\n",
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ctrl->val,
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motor->pwm_state.duty_cycle,
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motor->pwm_state.period,
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motor->pwm_state.polarity);
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break;
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default:
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dev_err(motor->dev, "not support cmd %d\n", ctrl->id);
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break;
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}
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return ret;
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}
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static long motor_ioctl(struct v4l2_subdev *sd, unsigned int cmd, void *arg)
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{
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return 0;
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}
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static const struct v4l2_subdev_core_ops motor_core_ops = {
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.ioctl = motor_ioctl,
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};
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static const struct v4l2_subdev_ops motor_subdev_ops = {
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.core = &motor_core_ops,
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};
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static const struct v4l2_ctrl_ops motor_ctrl_ops = {
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.s_ctrl = motor_s_ctrl,
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};
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static int motor_initialize_controls(struct motor_dev *motor)
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{
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struct v4l2_ctrl_handler *handler;
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int ret = 0;
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handler = &motor->ctrl_handler;
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ret = v4l2_ctrl_handler_init(handler, 1);
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if (ret)
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return ret;
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handler->lock = &motor->mutex;
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v4l2_ctrl_new_std(handler, &motor_ctrl_ops,
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V4L2_CID_IRIS_ABSOLUTE, 0, IRIS_MAX_LOG, IRIS_LOG_STEP, 0);
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if (handler->error) {
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ret = handler->error;
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dev_err(motor->dev,
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"Failed to init controls(%d)\n", ret);
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goto err_free_handler;
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}
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motor->sd.ctrl_handler = handler;
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return ret;
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err_free_handler:
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v4l2_ctrl_handler_free(handler);
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return ret;
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}
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static int motor_dev_probe(struct platform_device *pdev)
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{
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int ret = 0;
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struct motor_dev *motor;
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struct v4l2_subdev *sd;
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char facing[2];
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dev_info(&pdev->dev, "driver version: %02x.%02x.%02x",
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DRIVER_VERSION >> 16,
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(DRIVER_VERSION & 0xff00) >> 8,
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DRIVER_VERSION & 0x00ff);
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motor = devm_kzalloc(&pdev->dev, sizeof(*motor), GFP_KERNEL);
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if (!motor)
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return -ENOMEM;
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motor->dev = &pdev->dev;
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dev_set_name(motor->dev, "motor");
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dev_set_drvdata(motor->dev, motor);
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if (motor_dev_parse_dt(motor)) {
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dev_err(motor->dev, "parse dt error\n");
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return -EINVAL;
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}
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mutex_init(&motor->mutex);
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v4l2_subdev_init(&motor->sd, &motor_subdev_ops);
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motor->sd.owner = pdev->dev.driver->owner;
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motor->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
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motor->sd.dev = &pdev->dev;
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v4l2_set_subdevdata(&motor->sd, pdev);
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platform_set_drvdata(pdev, &motor->sd);
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motor_initialize_controls(motor);
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if (ret)
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goto err_free;
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ret = media_entity_pads_init(&motor->sd.entity, 0, NULL);
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if (ret < 0)
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goto err_free;
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sd = &motor->sd;
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sd->entity.function = MEDIA_ENT_F_LENS;
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sd->entity.flags = 2;
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memset(facing, 0, sizeof(facing));
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if (strcmp(motor->module_facing, "back") == 0)
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facing[0] = 'b';
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else
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facing[0] = 'f';
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snprintf(sd->name, sizeof(sd->name), "m%02d_%s_%s",
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motor->module_index, facing,
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DRIVER_NAME);
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ret = v4l2_async_register_subdev(sd);
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if (ret)
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dev_err(&pdev->dev, "v4l2 async register subdev failed\n");
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dev_info(motor->dev, "gpio motor driver probe success\n");
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return 0;
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err_free:
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v4l2_ctrl_handler_free(&motor->ctrl_handler);
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v4l2_device_unregister_subdev(&motor->sd);
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media_entity_cleanup(&motor->sd.entity);
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return ret;
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}
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static int motor_dev_remove(struct platform_device *pdev)
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{
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struct v4l2_subdev *sd = platform_get_drvdata(pdev);
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struct motor_dev *motor;
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if (sd)
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motor = v4l2_get_subdevdata(sd);
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else
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return -ENODEV;
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if (sd)
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v4l2_device_unregister_subdev(sd);
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v4l2_ctrl_handler_free(&motor->ctrl_handler);
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media_entity_cleanup(&motor->sd.entity);
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return 0;
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}
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#if defined(CONFIG_OF)
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static const struct of_device_id motor_dev_of_match[] = {
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{ .compatible = "rockchip,hall-dc", },
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{},
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};
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#endif
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static struct platform_driver motor_dev_driver = {
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.driver = {
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.name = DRIVER_NAME,
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.owner = THIS_MODULE,
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.of_match_table = of_match_ptr(motor_dev_of_match),
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},
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.probe = motor_dev_probe,
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.remove = motor_dev_remove,
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};
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module_platform_driver(motor_dev_driver);
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MODULE_LICENSE("GPL");
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MODULE_ALIAS("platform:motor");
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MODULE_AUTHOR("ROCKCHIP");
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