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405 lines
11 KiB
405 lines
11 KiB
#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/fs.h>
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#include <linux/interrupt.h>
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#include <linux/irq.h>
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#include <linux/sched.h>
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#include <linux/pm.h>
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#include <linux/slab.h>
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#include <linux/sysctl.h>
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#include <linux/proc_fs.h>
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#include <linux/delay.h>
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#include <linux/platform_device.h>
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#include <linux/input.h>
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#include <linux/workqueue.h>
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#include <linux/gpio.h>
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#include <linux/of_platform.h>
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#include <linux/of_gpio.h>
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#include <linux/of_device.h>
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#include <linux/of_irq.h>
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#include <linux/of.h>
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#include <linux/spinlock.h>
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#include <linux/wakelock.h>
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extern struct device *sec_key;
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struct sliding_up_hall_drvdata {
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struct input_dev *input;
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int gpio_sliding_up_hall;
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#if defined(EMULATE_sliding_up_hall_IC)
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int gpio_sliding_up_hall_key1;
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int gpio_sliding_up_hall_key2;
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int emulated_sliding_up_hall_status;
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#endif
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int irq_sliding_up_hall;
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bool sliding_up_hall;
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struct work_struct work;
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struct delayed_work sliding_up_hall_dwork;
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struct wake_lock sliding_up_hall_wake_lock;
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};
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static bool sliding_up_hall_status = 1;
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static ssize_t sliding_up_hall_detect_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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if (sliding_up_hall_status)
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sprintf(buf, "OPEN\n");
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else
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sprintf(buf, "CLOSE\n");
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return strlen(buf);
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}
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static DEVICE_ATTR(sliding_up_hall_detect, 0444, sliding_up_hall_detect_show, NULL);
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#ifdef CONFIG_SEC_FACTORY
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static void sliding_up_hall_work(struct work_struct *work)
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{
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bool first, second;
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struct sliding_up_hall_drvdata *ddata =
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container_of(work, struct sliding_up_hall_drvdata,
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sliding_up_hall_dwork.work);
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first = gpio_get_value(ddata->gpio_sliding_up_hall);
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pr_info("keys:%s #1 : %d\n", __func__, first);
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msleep(50);
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second = gpio_get_value(ddata->gpio_sliding_up_hall);
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pr_info("keys:%s #2 : %d\n", __func__, second);
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if (first == second) {
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sliding_up_hall_status = first;
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input_report_switch(ddata->input, SW_SLIDINGUPHALL, sliding_up_hall_status);
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input_sync(ddata->input);
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}
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}
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#else
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static void sliding_up_hall_work(struct work_struct *work)
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{
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bool first;
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struct sliding_up_hall_drvdata *ddata =
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container_of(work, struct sliding_up_hall_drvdata,
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sliding_up_hall_dwork.work);
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#if !defined(EMULATE_sliding_up_hall_IC)
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ddata->sliding_up_hall = gpio_get_value(ddata->gpio_sliding_up_hall);
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first = gpio_get_value(ddata->gpio_sliding_up_hall);
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pr_info("keys:%s #1 : %d\n", __func__, first);
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sliding_up_hall_status = first;
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input_report_switch(ddata->input,
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SW_SLIDINGUPHALL, ddata->sliding_up_hall);
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input_sync(ddata->input);
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#else
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ddata->sliding_up_hall = !gpio_get_value(ddata->gpio_sliding_up_hall_key1) & !gpio_get_value(ddata->gpio_sliding_up_hall_key2);
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first = !gpio_get_value(ddata->gpio_sliding_up_hall_key1) & !gpio_get_value(ddata->gpio_sliding_up_hall_key2);
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pr_info("keys:%s #1 key1=%d,key2=%d : %d\n", __func__, gpio_get_value(ddata->gpio_sliding_up_hall_key1),gpio_get_value(ddata->gpio_sliding_up_hall_key2),first);
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if(sliding_up_hall_status != first) {
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if(first)
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{
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ddata->emulated_sliding_up_hall_status = !ddata->emulated_sliding_up_hall_status;
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pr_info("keys:%s #1 : %d , %d\n", __func__, first, ddata->emulated_sliding_up_hall_status);
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input_report_switch(ddata->input,
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SW_SLIDINGUPHALL, ddata->emulated_sliding_up_hall_status);
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input_sync(ddata->input);
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}
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sliding_up_hall_status = first;
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}
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schedule_delayed_work(&ddata->sliding_up_hall_dwork, msecs_to_jiffies(1000));
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#endif
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}
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#endif
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static void __sliding_up_hall_detect(struct sliding_up_hall_drvdata *ddata, bool sliding_up_hall_status)
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{
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cancel_delayed_work_sync(&ddata->sliding_up_hall_dwork);
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#ifdef CONFIG_SEC_FACTORY
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schedule_delayed_work(&ddata->sliding_up_hall_dwork, HZ / 20);
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#else
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if (sliding_up_hall_status) {
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wake_lock_timeout(&ddata->sliding_up_hall_wake_lock, HZ * 5 / 100); /* 50ms */
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schedule_delayed_work(&ddata->sliding_up_hall_dwork, HZ * 1 / 100); /* 10ms */
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} else {
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wake_unlock(&ddata->sliding_up_hall_wake_lock);
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schedule_delayed_work(&ddata->sliding_up_hall_dwork, 0);
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}
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#endif
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}
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static irqreturn_t sliding_up_hall_detect(int irq, void *dev_id)
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{
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bool sliding_up_hall_status;
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struct sliding_up_hall_drvdata *ddata = dev_id;
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#if !defined(EMULATE_sliding_up_hall_IC)
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sliding_up_hall_status = gpio_get_value(ddata->gpio_sliding_up_hall);
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#else
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sliding_up_hall_status = gpio_get_value(ddata->gpio_sliding_up_hall_key1) & gpio_get_value(ddata->gpio_sliding_up_hall_key2);
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#endif
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pr_info("keys:%s sliding_up_hall_status : %d\n",
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__func__, sliding_up_hall_status);
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__sliding_up_hall_detect(ddata, sliding_up_hall_status);
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return IRQ_HANDLED;
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}
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static int sliding_up_hall_open(struct input_dev *input)
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{
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struct sliding_up_hall_drvdata *ddata = input_get_drvdata(input);
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/* update the current status */
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schedule_delayed_work(&ddata->sliding_up_hall_dwork, HZ / 2);
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/* Report current state of buttons that are connected to GPIOs */
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input_sync(input);
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return 0;
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}
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static void sliding_up_hall_close(struct input_dev *input)
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{
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}
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static void init_sliding_up_hall_ic_irq(struct input_dev *input)
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{
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struct sliding_up_hall_drvdata *ddata = input_get_drvdata(input);
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int ret = 0;
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int irq = ddata->irq_sliding_up_hall;
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#if !defined(EMULATE_sliding_up_hall_IC)
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sliding_up_hall_status = gpio_get_value(ddata->gpio_sliding_up_hall);
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#else
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sliding_up_hall_status = 0;
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#endif
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INIT_DELAYED_WORK(&ddata->sliding_up_hall_dwork, sliding_up_hall_work);
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ret =
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request_threaded_irq(
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irq, NULL,
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sliding_up_hall_detect,
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IRQF_TRIGGER_RISING |
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IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
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"sliding_up_hall", ddata);
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if (ret < 0) {
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pr_info("keys: failed to request sliding_up_hall irq %d gpio %d\n",
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irq, ddata->gpio_sliding_up_hall);
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} else {
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pr_info("%s : success\n", __func__);
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}
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}
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#ifdef CONFIG_OF
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static int of_sliding_up_hall_data_parsing_dt(struct device *dev, struct sliding_up_hall_drvdata *ddata)
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{
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struct device_node *np = dev->of_node;
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int gpio;
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enum of_gpio_flags flags;
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gpio = of_get_named_gpio_flags(np, "sliding_up_hall,gpio_sliding_up_hall", 0, &flags);
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ddata->gpio_sliding_up_hall = gpio;
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gpio = gpio_to_irq(gpio);
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ddata->irq_sliding_up_hall = gpio;
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pr_info("%s : gpio_sliding_up_hall=%d , irq_sliding_up_hall=%d\n", __func__, ddata->gpio_sliding_up_hall, ddata->irq_sliding_up_hall);
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#if defined(EMULATE_sliding_up_hall_IC)
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gpio = of_get_named_gpio_flags(np, "sliding_up_hall,gpio_sliding_up_hall_key1", 0, &flags);
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ddata->gpio_sliding_up_hall_key1 = gpio;
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gpio = of_get_named_gpio_flags(np, "sliding_up_hall,gpio_sliding_up_hall_key2", 0, &flags);
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ddata->gpio_sliding_up_hall_key2 = gpio;
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pr_info("%s : sliding_up_hall_key1=%d , sliding_up_hall_key2=%d\n", __func__, ddata->gpio_sliding_up_hall_key1, ddata->gpio_sliding_up_hall_key2);
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#endif
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return 0;
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}
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#endif
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static int sliding_up_hall_probe(struct platform_device *pdev)
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{
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struct device *dev = &pdev->dev;
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struct sliding_up_hall_drvdata *ddata;
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struct input_dev *input;
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int error;
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int wakeup = 0;
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pr_info("%s called", __func__);
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ddata = kzalloc(sizeof(struct sliding_up_hall_drvdata), GFP_KERNEL);
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if (!ddata) {
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dev_err(dev, "failed to allocate state\n");
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return -ENOMEM;
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}
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#ifdef CONFIG_OF
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if (dev->of_node) {
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error = of_sliding_up_hall_data_parsing_dt(dev, ddata);
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if (error < 0) {
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pr_info("%s : fail to get the dt (sliding_up_hall)\n", __func__);
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goto fail1;
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}
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}
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#endif
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#if defined(EMULATE_sliding_up_hall_IC)
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ddata->emulated_sliding_up_hall_status = 0;
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#endif
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input = input_allocate_device();
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if (!input) {
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dev_err(dev, "failed to allocate state\n");
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error = -ENOMEM;
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goto fail1;
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}
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ddata->input = input;
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wake_lock_init(&ddata->sliding_up_hall_wake_lock, WAKE_LOCK_SUSPEND,
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"sliding_up_hall wake lock");
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platform_set_drvdata(pdev, ddata);
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input_set_drvdata(input, ddata);
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input->name = "sliding_up_hall";
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input->phys = "sliding_up_hall";
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input->dev.parent = &pdev->dev;
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input->evbit[0] |= BIT_MASK(EV_SW);
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input_set_capability(input, EV_SW, SW_SLIDINGUPHALL);
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input->open = sliding_up_hall_open;
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input->close = sliding_up_hall_close;
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/* Enable auto repeat feature of Linux input subsystem */
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__set_bit(EV_REP, input->evbit);
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init_sliding_up_hall_ic_irq(input);
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if (ddata->gpio_sliding_up_hall != 0) {
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error = device_create_file(sec_key, &dev_attr_sliding_up_hall_detect);
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if (error < 0) {
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pr_err("Failed to create device file(%s)!, error: %d\n",
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dev_attr_sliding_up_hall_detect.attr.name, error);
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}
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}
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error = input_register_device(input);
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if (error) {
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dev_err(dev, "Unable to register input device, error: %d\n",
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error);
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goto fail1;
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}
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device_init_wakeup(&pdev->dev, wakeup);
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pr_info("%s end", __func__);
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return 0;
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fail1:
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kfree(ddata);
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return error;
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}
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static int sliding_up_hall_remove(struct platform_device *pdev)
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{
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struct sliding_up_hall_drvdata *ddata = platform_get_drvdata(pdev);
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struct input_dev *input = ddata->input;
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pr_info("%s start\n", __func__);
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device_init_wakeup(&pdev->dev, 0);
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input_unregister_device(input);
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wake_lock_destroy(&ddata->sliding_up_hall_wake_lock);
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kfree(ddata);
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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 sliding_up_hall_dt_ids[] = {
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{ .compatible = "sliding_up_hall" },
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{ },
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};
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MODULE_DEVICE_TABLE(of, sliding_up_hall_dt_ids);
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#endif /* CONFIG_OF */
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#ifdef CONFIG_PM_SLEEP
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static int sliding_up_hall_suspend(struct device *dev)
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{
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struct sliding_up_hall_drvdata *ddata = dev_get_drvdata(dev);
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struct input_dev *input = ddata->input;
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pr_info("%s start\n", __func__);
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enable_irq_wake(ddata->irq_sliding_up_hall);
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if (device_may_wakeup(dev)) {
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enable_irq_wake(ddata->irq_sliding_up_hall);
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} else {
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mutex_lock(&input->mutex);
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if (input->users)
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sliding_up_hall_close(input);
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mutex_unlock(&input->mutex);
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}
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return 0;
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}
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static int sliding_up_hall_resume(struct device *dev)
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{
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struct sliding_up_hall_drvdata *ddata = dev_get_drvdata(dev);
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struct input_dev *input = ddata->input;
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pr_info("%s start\n", __func__);
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input_sync(input);
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return 0;
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}
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#endif
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static SIMPLE_DEV_PM_OPS(sliding_up_hall_pm_ops, sliding_up_hall_suspend, sliding_up_hall_resume);
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static struct platform_driver sliding_up_hall_device_driver = {
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.probe = sliding_up_hall_probe,
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.remove = sliding_up_hall_remove,
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.driver = {
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.name = "sliding_up_hall",
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.owner = THIS_MODULE,
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.pm = &sliding_up_hall_pm_ops,
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#if defined(CONFIG_OF)
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.of_match_table = sliding_up_hall_dt_ids,
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#endif /* CONFIG_OF */
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}
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};
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static int __init sliding_up_hall_init(void)
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{
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pr_info("%s start\n", __func__);
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return platform_driver_register(&sliding_up_hall_device_driver);
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}
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static void __exit sliding_up_hall_exit(void)
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{
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pr_info("%s start\n", __func__);
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platform_driver_unregister(&sliding_up_hall_device_driver);
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}
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late_initcall(sliding_up_hall_init);
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module_exit(sliding_up_hall_exit);
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("Phil Blundell <pb@handhelds.org>");
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MODULE_DESCRIPTION("Keyboard driver for GPIOs");
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MODULE_ALIAS("platform:gpio-keys");
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