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/*
* drivers/misc/usb_cam_gpio.c
*
* Copyright (C) 2012-2016 Rockchip Co.,Ltd.
* Author: Bin Yang <yangbin@rock-chips.com>
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* 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/platform_device.h>
#include <linux/slab.h>
#include <linux/miscdevice.h>
#include <linux/gpio.h>
#include <linux/uaccess.h>
#include <linux/atomic.h>
#include <linux/delay.h>
#include <linux/input.h>
#include <linux/freezer.h>
#include <linux/of_gpio.h>
static struct class *usb_cam_gpio_class;
struct usb_cam_gpio {
struct device *dev;
struct device sys_dev;
struct gpio_desc *gpio_cam_hd;
struct gpio_desc *gpio_cam_ir;
};
static ssize_t hd_camera_on_show(struct device *sys_dev,
struct device_attribute *attr,
char *buf)
{
struct usb_cam_gpio *gpiod = container_of(sys_dev, struct usb_cam_gpio,
sys_dev);
return sprintf(buf, "%d\n", gpiod_get_value(gpiod->gpio_cam_hd));
}
static ssize_t hd_camera_on_store(struct device *sys_dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct usb_cam_gpio *gpiod = container_of(sys_dev, struct usb_cam_gpio,
sys_dev);
int val = 0;
int ret = 0;
ret = kstrtoint(buf, 0, &val);
if (ret < 0)
return ret;
if (val)
val = 1;
gpiod_set_value(gpiod->gpio_cam_hd, val);
return count;
}
static DEVICE_ATTR_RW(hd_camera_on);
static ssize_t ir_camera_on_show(struct device *sys_dev,
struct device_attribute *attr,
char *buf)
{
struct usb_cam_gpio *gpiod = container_of(sys_dev,
struct usb_cam_gpio, sys_dev);
return sprintf(buf, "%d\n", gpiod_get_value(gpiod->gpio_cam_ir));
}
static ssize_t ir_camera_on_store(struct device *sys_dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct usb_cam_gpio *gpiod = container_of(sys_dev,
struct usb_cam_gpio, sys_dev);
int val;
int ret;
ret = kstrtoint(buf, 0, &val);
if (ret < 0)
return ret;
if (val)
val = 1;
gpiod_set_value(gpiod->gpio_cam_ir, val);
return count;
}
static DEVICE_ATTR_RW(ir_camera_on);
static struct attribute *usb_cam_gpio_attrs[] = {
&dev_attr_hd_camera_on.attr,
&dev_attr_ir_camera_on.attr,
NULL,
};
ATTRIBUTE_GROUPS(usb_cam_gpio);
static int usb_cam_gpio_device_register(struct usb_cam_gpio *gpiod)
{
int ret;
struct device *dev = &gpiod->sys_dev;
const char *name = {"usb_camera_on"};
dev->class = usb_cam_gpio_class;
dev_set_name(dev, "%s", name);
dev_set_drvdata(dev, gpiod);
ret = device_register(dev);
return ret;
}
static int usb_cam_gpio_probe(struct platform_device *pdev)
{
struct usb_cam_gpio *gpiod;
int ret = 0;
usb_cam_gpio_class = class_create(THIS_MODULE, "usb_cam_gpio");
if (IS_ERR(usb_cam_gpio_class)) {
pr_err("create uvc_detection class failed (%ld)\n",
PTR_ERR(usb_cam_gpio_class));
return PTR_ERR(usb_cam_gpio_class);
}
usb_cam_gpio_class->dev_groups = usb_cam_gpio_groups;
gpiod = devm_kzalloc(&pdev->dev, sizeof(*gpiod), GFP_KERNEL);
if (!gpiod)
return -ENOMEM;
gpiod->dev = &pdev->dev;
gpiod->gpio_cam_hd = devm_gpiod_get_optional(gpiod->dev,
"hd-cam", GPIOD_OUT_LOW);
if (IS_ERR(gpiod->gpio_cam_hd)) {
dev_warn(gpiod->dev, "Could not get hd-cam-gpios!\n");
gpiod->gpio_cam_hd = NULL;
}
gpiod->gpio_cam_ir = devm_gpiod_get_optional(gpiod->dev,
"ir-cam", GPIOD_OUT_HIGH);
if (IS_ERR(gpiod->gpio_cam_ir)) {
dev_warn(gpiod->dev, "Could not get ir-cam-gpios!\n");
gpiod->gpio_cam_ir = NULL;
}
ret = usb_cam_gpio_device_register(gpiod);
if (ret < 0) {
dev_err(gpiod->dev, "usb_cam_gpio device register fail\n");
return ret;
}
dev_info(gpiod->dev, "usb_cam_gpio_probe success\n");
return 0;
}
static const struct of_device_id usb_cam_gpio_match[] = {
{ .compatible = "usb-cam-gpio" },
{ /* Sentinel */ }
};
static int usb_cam_gpio_remove(struct platform_device *pdev)
{
if (!IS_ERR(usb_cam_gpio_class))
class_destroy(usb_cam_gpio_class);
return 0;
}
static struct platform_driver usb_cam_gpio_driver = {
.probe = usb_cam_gpio_probe,
.remove = usb_cam_gpio_remove,
.driver = {
.name = "usb_cam_gpio",
.owner = THIS_MODULE,
.of_match_table = usb_cam_gpio_match,
},
};
module_platform_driver(usb_cam_gpio_driver);
MODULE_ALIAS("platform:usb_cam_gpio");
MODULE_AUTHOR("Bin Yang <yangbin@rock-chips.com>");
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("usb camera gpio driver");
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