195 lines
4.3 KiB
C
195 lines
4.3 KiB
C
#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/input.h>
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#include <linux/delay.h>
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#include <linux/slab.h>
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#include <linux/interrupt.h>
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#include <linux/keyboard.h>
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#include <linux/ioport.h>
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#include <linux/timer.h>
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#include <linux/clk.h>
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#include <linux/sys_config.h>
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#include <linux/sys_config.h>
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#include <linux/of_gpio.h>
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#include <linux/platform_device.h>
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#include <linux/power/scenelock.h>
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static volatile u32 key_val;
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static struct gpio_config power_key_io;
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static struct mutex gk_mutex;
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static struct input_dev *sunxigk_dev;
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static int suspend_flg;
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#ifdef CONFIG_PM
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static struct dev_pm_domain keyboard_pm_domain;
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#endif
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static irqreturn_t sunxi_isr_gk(int irq, void *dummy)
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{
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mutex_lock(&gk_mutex);
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if (__gpio_get_value(power_key_io.gpio)) {
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if (suspend_flg) {
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input_report_key(sunxigk_dev, KEY_POWER, 1);
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input_sync(sunxigk_dev);
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suspend_flg = 0;
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}
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input_report_key(sunxigk_dev, KEY_POWER, 0);
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input_sync(sunxigk_dev);
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} else{
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input_report_key(sunxigk_dev, KEY_POWER, 1);
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input_sync(sunxigk_dev);
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suspend_flg = 0;
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}
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mutex_unlock(&gk_mutex);
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return IRQ_HANDLED;
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}
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static int sunxi_keyboard_suspend(struct device *dev)
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{
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mutex_lock(&gk_mutex);
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suspend_flg = 1;
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mutex_unlock(&gk_mutex);
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return 0;
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}
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static int sunxi_keyboard_resume(struct device *dev)
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{
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return 0;
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}
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static int sunxigk_script_startup(struct device_node *np)
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{
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unsigned int gpio = 0;
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gpio = of_get_named_gpio_flags(np, "key_io", 0,
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(enum of_gpio_flags *)&power_key_io);
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if (!gpio_is_valid(gpio)) {
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return -1;
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}
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return 0;
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}
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static int sunxigk_probe(struct platform_device *pdev)
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{
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int err = 0;
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int irq_number = 0;
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struct device_node *sunxigk_np = NULL;
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sunxigk_np = pdev->dev.of_node;
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if (!sunxigk_np) {
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printk("leds_blink_np is not found");
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goto fail1;
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}
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if (sunxigk_script_startup(sunxigk_np)) {
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err = -EFAULT;
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goto fail1;
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}
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sunxigk_dev = input_allocate_device();
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if (!sunxigk_dev) {
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pr_err("sunxigk: not enough memory for input device\n");
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err = -ENOMEM;
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goto fail1;
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}
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sunxigk_dev->name = "sunxi-gpiokey";
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sunxigk_dev->phys = "sunxikbd/input0";
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sunxigk_dev->id.bustype = BUS_HOST;
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sunxigk_dev->id.vendor = 0x0001;
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sunxigk_dev->id.product = 0x0001;
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sunxigk_dev->id.version = 0x0100;
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#ifdef REPORT_REPEAT_KEY_BY_INPUT_CORE
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sunxigk_dev->evbit[0] = BIT_MASK(EV_KEY)|BIT_MASK(EV_REP);
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printk(KERN_DEBUG "REPORT_REPEAT_KEY_BY_INPUT_CORE is defined, support report repeat key value. \n");
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#else
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sunxigk_dev->evbit[0] = BIT_MASK(EV_KEY);
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#endif
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set_bit(KEY_POWER, sunxigk_dev->keybit);
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mutex_init(&gk_mutex);
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irq_number = gpio_to_irq(power_key_io.gpio);
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err = input_register_device(sunxigk_dev);
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if (err)
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goto fail2;
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#ifdef CONFIG_PM
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keyboard_pm_domain.ops.suspend = sunxi_keyboard_suspend;
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keyboard_pm_domain.ops.resume = sunxi_keyboard_resume;
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sunxigk_dev->dev.pm_domain = &keyboard_pm_domain;
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#endif
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if (devm_request_irq(&sunxigk_dev->dev, irq_number, sunxi_isr_gk,
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IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING | IRQF_NO_SUSPEND, "gk_EINT", NULL)) {
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err = -EBUSY;
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pr_err(KERN_DEBUG "request irq failure. \n");
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goto fail3;
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}
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enable_wakeup_src(CPUS_GPIO_SRC, power_key_io.gpio);
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return 0;
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fail3:
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input_unregister_device(sunxigk_dev);
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fail2:
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input_free_device(sunxigk_dev);
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fail1:
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printk(KERN_DEBUG "sunxikbd_init failed. \n");
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return err;
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}
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static int sunxigk_remove(struct platform_device *dev)
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{
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disable_wakeup_src(CPUS_GPIO_SRC, power_key_io.gpio);
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devm_free_irq(&sunxigk_dev->dev, gpio_to_irq(power_key_io.gpio), NULL);
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input_unregister_device(sunxigk_dev);
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return 0;
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}
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static const struct of_device_id sunxigk_of_match[] = {
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{.compatible = "allwinner,sunxi-gpio-power-key", .data = NULL},
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{ /* sentinel */ }
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};
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static struct platform_driver sunxigk_driver = {
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.probe = sunxigk_probe,
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.remove = sunxigk_remove,
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.driver = {
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.name = "sunxi_gpio_power_key",
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.of_match_table = of_match_ptr(sunxigk_of_match),
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},
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};
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static int __init sunxigk_init(void)
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{
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if (platform_driver_register(&sunxigk_driver)) {
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pr_err("gpio user platform_driver_register fail\n");
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return -1;
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}
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return 0;
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}
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static void __exit sunxigk_exit(void)
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{
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platform_driver_unregister(&sunxigk_driver);
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}
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module_init(sunxigk_init);
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module_exit(sunxigk_exit);
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MODULE_AUTHOR("lipeifeng");
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MODULE_DESCRIPTION("sunxi gpio power key driver");
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MODULE_LICENSE("GPL");
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