diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig index 44097a3e0fcc..1c1c814d9bea 100644 --- a/drivers/leds/Kconfig +++ b/drivers/leds/Kconfig @@ -670,6 +670,12 @@ config LEDS_IS31FL32XX LED controllers. They are I2C devices with multiple constant-current channels, each with independent 256-level PWM control. +config LEDS_RGB13H + tristate "LED support for DL3020RGB13H flash LED controller" + depends on LEDS_CLASS_FLASH && GPIOLIB && OF + help + Say Y here to include support for DL3020RGB13H LED controllers. + config LEDS_SC27XX_BLTC tristate "LED support for the SC27xx breathing light controller" depends on LEDS_CLASS && MFD_SC27XX_PMIC diff --git a/drivers/leds/Makefile b/drivers/leds/Makefile index 420b5d2cfa62..80aaa603adb4 100644 --- a/drivers/leds/Makefile +++ b/drivers/leds/Makefile @@ -70,6 +70,7 @@ obj-$(CONFIG_LEDS_KTD2692) += leds-ktd2692.o obj-$(CONFIG_LEDS_POWERNV) += leds-powernv.o obj-$(CONFIG_LEDS_IS31FL319X) += leds-is31fl319x.o obj-$(CONFIG_LEDS_IS31FL32XX) += leds-is31fl32xx.o +obj-$(CONFIG_LEDS_RGB13H) += leds-rgb13h.o obj-$(CONFIG_LEDS_PM8058) += leds-pm8058.o obj-$(CONFIG_LEDS_MLXCPLD) += leds-mlxcpld.o obj-$(CONFIG_LEDS_MLXREG) += leds-mlxreg.o diff --git a/drivers/leds/leds-rgb13h.c b/drivers/leds/leds-rgb13h.c new file mode 100644 index 000000000000..546722b3ba62 --- /dev/null +++ b/drivers/leds/leds-rgb13h.c @@ -0,0 +1,567 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (c) 2019 Fuzhou Rockchip Electronics Co., Ltd. + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define DRIVER_VERSION KERNEL_VERSION(0, 0x01, 0x0) + +#define FLASH_TIMEOUT_MIN 1000 +#define FLASH_TIMEOUT_STEP 1000 + +struct rgb13h_led { + struct platform_device *pdev; + struct led_classdev_flash fled_cdev; + struct v4l2_ctrl_handler ctrls; + struct v4l2_subdev sd; + /* secures access to the device */ + struct mutex lock; + struct gpio_desc *gpio_en; + /* maximum LED current in torch mode*/ + u32 max_mm_current; + /* maximum LED current in flash mode */ + u32 max_flash_current; + /* maximum flash timeout */ + u32 max_flash_tm; + u32 intensity; + bool strobe_state; + /* brightness cache */ + u32 torch_brightness; + /* assures led-triggers compatibility */ + struct work_struct work_brightness_set; + + struct timeval timestamp; + + u32 timeout; + bool waiting; + wait_queue_head_t done; + struct work_struct work_timeout; + + enum v4l2_flash_led_mode led_mode; + + u32 module_index; + const char *module_facing; +}; + +static struct rgb13h_led *fled_cdev_to_led(struct led_classdev_flash *fled_cdev) +{ + return container_of(fled_cdev, struct rgb13h_led, fled_cdev); +} + +static struct rgb13h_led *sd_to_led(struct v4l2_subdev *subdev) +{ + return container_of(subdev, struct rgb13h_led, sd); +} + +static int rgb13h_set_output(struct rgb13h_led *led, bool on) +{ + mutex_lock(&led->lock); + gpiod_direction_output(led->gpio_en, on); + if (!on) { + led->strobe_state = false; + if (led->waiting) { + led->waiting = false; + wake_up(&led->done); + } + } else { + led->timestamp = ns_to_timeval(ktime_get_ns()); + } + mutex_unlock(&led->lock); + return 0; +} + +static void rgb13h_timeout_work(struct work_struct *work) +{ + struct rgb13h_led *led = + container_of(work, struct rgb13h_led, work_timeout); + + wait_event_timeout(led->done, !led->waiting, + usecs_to_jiffies(led->timeout)); + if (led->waiting) { + led->waiting = false; + led->strobe_state = false; + rgb13h_set_output(led, false); + } +} + +static void rgb13h_brightness_set_work(struct work_struct *work) +{ + struct rgb13h_led *led = + container_of(work, struct rgb13h_led, work_brightness_set); + + rgb13h_set_output(led, !!led->torch_brightness); +} + +static void rgb13h_led_brightness_set(struct led_classdev *led_cdev, + enum led_brightness brightness) +{ + struct led_classdev_flash *fled_cdev = lcdev_to_flcdev(led_cdev); + struct rgb13h_led *led = fled_cdev_to_led(fled_cdev); + + led->torch_brightness = brightness; + schedule_work(&led->work_brightness_set); +} + +static int rgb13h_led_brightness_set_sync(struct led_classdev *led_cdev, + enum led_brightness brightness) +{ + struct led_classdev_flash *fled_cdev = lcdev_to_flcdev(led_cdev); + struct rgb13h_led *led = fled_cdev_to_led(fled_cdev); + + rgb13h_set_output(led, !!brightness); + return 0; +} + +static int rgb13h_led_flash_strobe_set(struct led_classdev_flash *fled_cdev, + bool state) + +{ + struct rgb13h_led *led = fled_cdev_to_led(fled_cdev); + + mutex_lock(&led->lock); + led->strobe_state = state; + if (state) { + led->waiting = true; + schedule_work(&led->work_timeout); + } + mutex_unlock(&led->lock); + + return rgb13h_set_output(led, state); +} + +static int rgb13h_led_flash_strobe_get(struct led_classdev_flash *fled_cdev, + bool *state) +{ + struct rgb13h_led *led = fled_cdev_to_led(fled_cdev); + + mutex_lock(&led->lock); + *state = led->strobe_state; + mutex_unlock(&led->lock); + return 0; +} + +static int rgb13h_led_flash_timeout_set(struct led_classdev_flash *fled_cdev, + u32 timeout) +{ + struct rgb13h_led *led = fled_cdev_to_led(fled_cdev); + + mutex_lock(&led->lock); + led->timeout = timeout; + mutex_unlock(&led->lock); + return 0; +} + +static int rgb13h_led_parse_dt(struct rgb13h_led *led, + struct device_node **sub_node) +{ + struct led_classdev *led_cdev = &led->fled_cdev.led_cdev; + struct device *dev = &led->pdev->dev; + struct device_node *child_node = dev->of_node; + int ret = 0; + + ret = of_property_read_u32(child_node, + RKMODULE_CAMERA_MODULE_INDEX, + &led->module_index); + ret |= of_property_read_string(child_node, + RKMODULE_CAMERA_MODULE_FACING, + &led->module_facing); + if (ret) { + dev_err(dev, "could not get module information!\n"); + return -EINVAL; + } + + led->gpio_en = devm_gpiod_get(dev, "enable", GPIOD_ASIS); + if (IS_ERR(led->gpio_en)) { + ret = PTR_ERR(led->gpio_en); + dev_err(dev, "Unable to claim enable-gpio\n"); + return ret; + } + + led_cdev->name = of_get_property(child_node, "label", NULL) ? : + child_node->name; + + ret = of_property_read_u32(child_node, "led-max-microamp", + &led->max_mm_current); + if (ret < 0) + dev_warn(dev, + "led-max-microamp DT property missing\n"); + + ret = of_property_read_u32(child_node, "flash-max-microamp", + &led->max_flash_current); + if (ret < 0) { + dev_err(dev, + "flash-max-microamp DT property missing\n"); + return ret; + } + + ret = of_property_read_u32(child_node, "flash-max-timeout-us", + &led->max_flash_tm); + if (ret < 0) { + dev_err(dev, + "flash-max-timeout-us DT property missing\n"); + return ret; + } + + *sub_node = child_node; + return ret; +} + +static int rgb13h_led_get_configuration(struct rgb13h_led *led, + struct device_node **sub_node) +{ + int ret; + + ret = rgb13h_led_parse_dt(led, sub_node); + if (ret < 0) + return ret; + + return 0; +} + +static void rgb13h_init_flash_timeout(struct rgb13h_led *led) +{ + struct led_classdev_flash *fled_cdev = &led->fled_cdev; + struct led_flash_setting *setting; + + /* Init flash timeout setting */ + setting = &fled_cdev->timeout; + setting->min = FLASH_TIMEOUT_MIN; + setting->max = led->max_flash_tm; + setting->step = FLASH_TIMEOUT_STEP; + setting->val = setting->max; +} + +static int rgb13h_get_ctrl(struct v4l2_ctrl *ctrl) +{ + struct rgb13h_led *led = + container_of(ctrl->handler, struct rgb13h_led, ctrls); + + switch (ctrl->id) { + case V4L2_CID_FLASH_FAULT: + ctrl->val = 0; + break; + case V4L2_CID_FLASH_STROBE_STATUS: + if (led->led_mode != V4L2_FLASH_LED_MODE_FLASH) { + ctrl->val = 0; + break; + } + ctrl->val = led->strobe_state; + break; + case V4L2_CID_FLASH_INTENSITY: + case V4L2_CID_FLASH_TORCH_INTENSITY: + ctrl->val = led->intensity; + break; + case V4L2_CID_FLASH_LED_MODE: + ctrl->val = led->led_mode; + break; + default: + dev_err(&led->pdev->dev, + "ctrl 0x%x not supported\n", ctrl->id); + return -EINVAL; + } + + return 0; +} + +static int rgb13h_set_ctrl(struct v4l2_ctrl *ctrl) +{ + struct rgb13h_led *led = + container_of(ctrl->handler, struct rgb13h_led, ctrls); + + switch (ctrl->id) { + case V4L2_CID_FLASH_LED_MODE: + led->led_mode = ctrl->val; + rgb13h_set_output(led, LED_OFF); + if (led->led_mode == V4L2_FLASH_LED_MODE_TORCH) + return rgb13h_set_output(led, !!led->intensity); + break; + + case V4L2_CID_FLASH_STROBE_SOURCE: + if (ctrl->val == V4L2_FLASH_STROBE_SOURCE_EXTERNAL) + return -EBUSY; + break; + case V4L2_CID_FLASH_STROBE: + if (led->led_mode != V4L2_FLASH_LED_MODE_FLASH) + return -EBUSY; + return rgb13h_led_flash_strobe_set(&led->fled_cdev, true); + case V4L2_CID_FLASH_STROBE_STOP: + if (led->led_mode != V4L2_FLASH_LED_MODE_FLASH) + return -EBUSY; + return rgb13h_led_flash_strobe_set(&led->fled_cdev, false); + case V4L2_CID_FLASH_TIMEOUT: + return rgb13h_led_flash_timeout_set(&led->fled_cdev, ctrl->val); + case V4L2_CID_FLASH_INTENSITY: + break; + case V4L2_CID_FLASH_TORCH_INTENSITY: + if (led->led_mode != V4L2_FLASH_LED_MODE_TORCH) + break; + led->intensity = ctrl->val; + return rgb13h_set_output(led, !!ctrl->val); + default: + dev_err(&led->pdev->dev, + "ctrl 0x%x not supported\n", ctrl->id); + return -EINVAL; + } + return 0; +} + +static const struct v4l2_ctrl_ops rgb13h_ctrl_ops = { + .g_volatile_ctrl = rgb13h_get_ctrl, + .s_ctrl = rgb13h_set_ctrl, +}; + +static int rgb13h_init_controls(struct rgb13h_led *led) +{ + struct v4l2_ctrl *ctrl = NULL; + + v4l2_ctrl_handler_init(&led->ctrls, 10); + /* V4L2_CID_FLASH_LED_MODE */ + v4l2_ctrl_new_std_menu(&led->ctrls, &rgb13h_ctrl_ops, + V4L2_CID_FLASH_LED_MODE, 2, ~7, + V4L2_FLASH_LED_MODE_NONE); + led->led_mode = V4L2_FLASH_LED_MODE_NONE; + /* V4L2_CID_FLASH_STROBE_SOURCE */ + v4l2_ctrl_new_std_menu(&led->ctrls, &rgb13h_ctrl_ops, + V4L2_CID_FLASH_STROBE_SOURCE, + 0, ~1, V4L2_FLASH_STROBE_SOURCE_SOFTWARE); + /* V4L2_CID_FLASH_STROBE */ + v4l2_ctrl_new_std(&led->ctrls, &rgb13h_ctrl_ops, + V4L2_CID_FLASH_STROBE, 0, 0, 0, 0); + /* V4L2_CID_FLASH_STROBE_STOP */ + v4l2_ctrl_new_std(&led->ctrls, &rgb13h_ctrl_ops, + V4L2_CID_FLASH_STROBE_STOP, 0, 0, 0, 0); + /* V4L2_CID_FLASH_STROBE_STATUS */ + ctrl = v4l2_ctrl_new_std(&led->ctrls, &rgb13h_ctrl_ops, + V4L2_CID_FLASH_STROBE_STATUS, + 0, 1, 1, 0); + led->strobe_state = false; + if (ctrl) + ctrl->flags |= V4L2_CTRL_FLAG_VOLATILE; + /* V4L2_CID_FLASH_TIMEOUT */ + v4l2_ctrl_new_std(&led->ctrls, &rgb13h_ctrl_ops, + V4L2_CID_FLASH_TIMEOUT, FLASH_TIMEOUT_MIN, + led->max_flash_tm, FLASH_TIMEOUT_STEP, + led->max_flash_tm); + led->timeout = led->max_flash_tm; + /* V4L2_CID_FLASH_INTENSITY */ + v4l2_ctrl_new_std(&led->ctrls, &rgb13h_ctrl_ops, + V4L2_CID_FLASH_INTENSITY, 0, + led->max_flash_current, + led->max_flash_current, + led->max_flash_current); + /* V4L2_CID_FLASH_TORCH_INTENSITY */ + v4l2_ctrl_new_std(&led->ctrls, &rgb13h_ctrl_ops, + V4L2_CID_FLASH_TORCH_INTENSITY, 0, + led->max_mm_current, + led->max_mm_current, + led->max_mm_current); + led->intensity = led->max_mm_current; + /* V4L2_CID_FLASH_FAULT */ + ctrl = v4l2_ctrl_new_std(&led->ctrls, &rgb13h_ctrl_ops, + V4L2_CID_FLASH_FAULT, 0, + V4L2_FLASH_FAULT_OVER_VOLTAGE | + V4L2_FLASH_FAULT_TIMEOUT | + V4L2_FLASH_FAULT_OVER_TEMPERATURE | + V4L2_FLASH_FAULT_SHORT_CIRCUIT, 0, 0); + if (ctrl) + ctrl->flags |= V4L2_CTRL_FLAG_VOLATILE; + led->sd.ctrl_handler = &led->ctrls; + return led->ctrls.error; +} + +static long rgb13h_ioctl(struct v4l2_subdev *sd, + unsigned int cmd, void *arg) +{ + struct rgb13h_led *led = sd_to_led(sd); + struct timeval *t; + + if (cmd == RK_VIDIOC_FLASH_TIMEINFO) { + t = (struct timeval *)arg; + t->tv_sec = led->timestamp.tv_sec; + t->tv_usec = led->timestamp.tv_usec; + } else { + return -EINVAL; + } + return 0; +} + +#ifdef CONFIG_COMPAT +#define RK_VIDIOC_COMPAT_FLASH_TIMEINFO \ + _IOR('V', BASE_VIDIOC_PRIVATE + 0, struct compat_timeval) +static long rgb13h_compat_ioctl32(struct v4l2_subdev *sd, + unsigned int cmd, + unsigned long arg) +{ + struct timeval t; + struct compat_timeval compat_t; + struct compat_timeval __user *p32 = compat_ptr(arg); + + if (cmd == RK_VIDIOC_COMPAT_FLASH_TIMEINFO) { + rgb13h_ioctl(sd, RK_VIDIOC_FLASH_TIMEINFO, &t); + compat_t.tv_sec = t.tv_sec; + compat_t.tv_usec = t.tv_usec; + put_user(compat_t.tv_sec, &p32->tv_sec); + put_user(compat_t.tv_usec, &p32->tv_usec); + } else { + return -EINVAL; + } + + return 0; +} +#endif + +static const struct v4l2_subdev_core_ops v4l2_flash_core_ops = { + .ioctl = rgb13h_ioctl, +#ifdef CONFIG_COMPAT + .compat_ioctl32 = rgb13h_compat_ioctl32 +#endif +}; + +static const struct v4l2_subdev_ops v4l2_flash_subdev_ops = { + .core = &v4l2_flash_core_ops, +}; + +static const struct led_flash_ops flash_ops = { + .strobe_set = rgb13h_led_flash_strobe_set, + .strobe_get = rgb13h_led_flash_strobe_get, + .timeout_set = rgb13h_led_flash_timeout_set, +}; + +static int rgb13h_led_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct device_node *sub_node = NULL; + struct rgb13h_led *led; + struct led_classdev *led_cdev; + struct led_classdev_flash *fled_cdev; + struct v4l2_subdev *sd = NULL; + char facing[2]; + int ret; + + dev_info(dev, "driver version: %02x.%02x.%02x", + DRIVER_VERSION >> 16, + (DRIVER_VERSION & 0xff00) >> 8, + DRIVER_VERSION & 0x00ff); + + led = devm_kzalloc(dev, sizeof(*led), GFP_KERNEL); + if (!led) + return -ENOMEM; + + led->pdev = pdev; + platform_set_drvdata(pdev, led); + + fled_cdev = &led->fled_cdev; + fled_cdev->ops = &flash_ops; + led_cdev = &fled_cdev->led_cdev; + + ret = rgb13h_led_get_configuration(led, &sub_node); + if (ret < 0) + return ret; + + mutex_init(&led->lock); + + /* Initialize LED Flash class device */ + led_cdev->brightness_set = rgb13h_led_brightness_set; + led_cdev->brightness_set_blocking = rgb13h_led_brightness_set_sync; + led_cdev->max_brightness = LED_FULL; + led_cdev->flags |= LED_DEV_CAP_FLASH; + INIT_WORK(&led->work_brightness_set, rgb13h_brightness_set_work); + + /* Init strobe timeout handle */ + led->waiting = false; + init_waitqueue_head(&led->done); + INIT_WORK(&led->work_timeout, rgb13h_timeout_work); + + rgb13h_init_flash_timeout(led); + + /* Register LED Flash class device */ + ret = led_classdev_flash_register(&pdev->dev, fled_cdev); + if (ret < 0) + goto err_flash_register; + + sd = &led->sd; + sd->dev = dev; + v4l2_subdev_init(sd, &v4l2_flash_subdev_ops); + sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE; + memset(facing, 0, sizeof(facing)); + if (strcmp(led->module_facing, "back") == 0) + facing[0] = 'b'; + else + facing[0] = 'f'; + snprintf(sd->name, sizeof(sd->name), "m%02d_%s_%s %s", + led->module_index, facing, + led_cdev->name, dev_name(sd->dev)); + ret = media_entity_pads_init(&sd->entity, 0, NULL); + if (ret < 0) + goto error_v4l2_flash_init; + + sd->entity.function = MEDIA_ENT_F_FLASH; + ret = rgb13h_init_controls(led); + if (ret < 0) + goto err_init_controls; + + ret = v4l2_async_register_subdev(sd); + if (ret < 0) + goto err_async_register_sd; + + return 0; + +err_async_register_sd: + v4l2_ctrl_handler_free(sd->ctrl_handler); +err_init_controls: + media_entity_cleanup(&sd->entity); +error_v4l2_flash_init: + led_classdev_flash_unregister(fled_cdev); +err_flash_register: + mutex_destroy(&led->lock); + + return ret; +} + +static int rgb13h_led_remove(struct platform_device *pdev) +{ + struct rgb13h_led *led = platform_get_drvdata(pdev); + + v4l2_async_unregister_subdev(&led->sd); + v4l2_ctrl_handler_free(led->sd.ctrl_handler); + media_entity_cleanup(&led->sd.entity); + led_classdev_flash_unregister(&led->fled_cdev); + + mutex_destroy(&led->lock); + + return 0; +} + +static const struct of_device_id rgb13h_led_dt_match[] = { + { .compatible = "led,rgb13h" }, + {}, +}; +MODULE_DEVICE_TABLE(of, rgb13h_led_dt_match); + +static struct platform_driver rgb13h_led_driver = { + .probe = rgb13h_led_probe, + .remove = rgb13h_led_remove, + .driver = { + .name = "rgb13h-flash", + .of_match_table = rgb13h_led_dt_match, + }, +}; + +module_platform_driver(rgb13h_led_driver); + +MODULE_DESCRIPTION("GPIO LEDS Flash driver"); +MODULE_LICENSE("GPL v2");