The button driver code example is attached.
Button driver code directory is: <kernel>/drivers/input/button
You should edit this code for your hardware.
On Tue, 9 Jun 2015 at 14:32 中外 <[email protected]> wrote:
> Dear sir.
> our democode download from our chipset office web. but the democode
> don't have this function.
> can you give me the example?
> thanks very much!
> you are good man.
>
>
> On Tuesday, 9 June 2015 00:10:42 UTC+8, Sodkhuu Dalaikhuu wrote:
>>
>> You need to configure your button driver code.
>>
>> On Monday, 8 June 2015 13:07:05 UTC+9, 中外 wrote:
>>>
>>> Dear All.
>>> As the title. and our android version is 4.4.3_r1,and there have a
>>> GPIO is used by Detect home_key Press.
>>>
>>> thanks
>>>
>> --
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#include <linux/module.h>
#include <linux/init.h>
#include <linux/fs.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/sched.h>
#include <linux/pm.h>
#include <linux/sysctl.h>
#include <linux/proc_fs.h>
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/platform_device.h>
#include <linux/input.h>
#include <asm/gpio.h>
#include <linux/gpio.h>
#include <mach/gpio.h>
#include <plat/gpio-cfg.h>
#include <linux/sysfs.h>
#include <linux/io.h>
#include <mach/regs-clock.h>
#include <linux/wakelock.h>
static struct timer_list timer;
static struct input_dev * input;
extern struct proc_dir_entry proc_root;
static struct wake_lock s_wakelock;
#define PROC_NAME "rpgps"
enum {
BUTTON_BACK = 0,
// BUTTON_MENU,
BUTTON_HOME,
BUTTON_VOLUMEUP,
BUTTON_VOLUMEDOWN,
// BUTTON_UP,
// BUTTON_DOWN,
// BUTTON_LEFT,
// BUTTON_RIGHT,
// BUTTON_END,
BUTTONE_MAX
};
struct st_s3c_key{
int key_code;
uint key_pin;
int key_history_flg;
};
#define MAX_BUTTON_CNT (BUTTONE_MAX)
static struct proc_dir_entry *root_entry;
static struct proc_dir_entry *entry;
extern struct proc_dir_entry proc_root;
static int s3c_Keycode[MAX_BUTTON_CNT] = {
KEY_BACK,
// KEY_MENU,
KEY_HOME,
KEY_VOLUMEUP,
KEY_VOLUMEDOWN,
// KEY_UP,
// KEY_DOWN,
// KEY_LEFT,
// KEY_RIGHT,
// KEY_END,
};
static int regproc_init(void)
{
struct proc_dir_entry *entry;
entry = create_proc_entry(PROC_NAME, 0666, &proc_root);
if(entry)
{
entry->write_proc = NULL;
entry->read_proc = NULL;
}
return 0;
}
static struct st_s3c_key s3c_key_para[MAX_BUTTON_CNT] = {
{ KEY_BACK, EXYNOS4_GPX2(0), 0},
// { KEY_MENU, EXYNOS4_GPX3(2), 0},
{ KEY_VOLUMEUP, EXYNOS4_GPX2(1), 0},
// { KEY_UP, EXYNOS4_GPX2(6), 0},
// { KEY_DOWN, EXYNOS4_GPX2(7), 0},
//EDITED BY SODOO FOR SLEEP/WAKE BUTTON
// { KEY_HOMEPAGE, EXYNOS4_GPX2(4), 0},
{ KEY_POWER, EXYNOS4_GPX2(4), 0},
{ KEY_VOLUMEDOWN, EXYNOS4_GPX2(5), 0},
// { KEY_LEFT, EXYNOS4_GPX2(0), 0},
// { KEY_RIGHT, EXYNOS4_GPX2(1), 0},
// { KEY_END, EXYNOS4_GPX0(1), 0},
};
static void s3cbutton_timer_handler(unsigned long data)
{
int flag;
int i;
for(i=0; i<MAX_BUTTON_CNT; i++)
{
flag = gpio_get_value(s3c_key_para[i].key_pin);
if(flag != s3c_key_para[i].key_history_flg)
{
if(flag)
{
input_report_key(input, s3c_key_para[i].key_code, 0);
//printk("s3c-button back key up!\n");
}
else
{
input_report_key(input, s3c_key_para[i].key_code, 1);
//printk("s3c-button back key down!!\n");
}
s3c_key_para[i].key_history_flg= flag;
input_sync(input);
}
}
/* Kernel Timer restart */
mod_timer(&timer,jiffies + HZ/20);
}
#define LED_GPIO_1 EXYNOS4212_GPM1(4) //LED 6
#define LED_GPIO_2 EXYNOS4_GPX1(3) //LED 7
#define LED_GPIO_3 EXYNOS4_GPX2(2) //LED8
#define BUZZER_GPIO EXYNOS4_GPX1(7) //buzzer
static int button_proc_write(struct file *file, const char *buffer,
unsigned long count, void *data)
{
int value;
value = 0;
sscanf(buffer, "%d", &value);
printk("value = %d\n",value);
if (value == 1)
{
gpio_direction_output(LED_GPIO_1, 0);
}
else if (value == 2)
{
gpio_direction_output(LED_GPIO_1, 1);
}
else if (value == 3)
{
gpio_direction_output(LED_GPIO_2, 0);
}
else if (value == 4)
{
gpio_direction_output(LED_GPIO_2, 1);
}
else if (value == 5)
{
gpio_direction_output(LED_GPIO_3, 0);
}
else if (value == 6)
{
gpio_direction_output(LED_GPIO_3, 1);
}
else if (value == 7) //buzzer
{
gpio_direction_output(BUZZER_GPIO, 1);
mdelay(500);
gpio_direction_output(BUZZER_GPIO, 0);
}
return count;
}
static int button_proc_read(char *page, char **start, off_t off,
int count, int *eof, void *data)
{
int value;
int i;
int len = 0;
// len = sprintf(page, "\n%s = \n", __func__);
value = gpio_get_value(LED_GPIO_1);
len = sprintf(page+len, " %d,", value);
value = gpio_get_value(LED_GPIO_2);
len += sprintf(page+len, " %d,", value);
value = gpio_get_value(LED_GPIO_3);
len += sprintf(page+len, " %d,", value);
return len;
}
static int RS485_proc_write(struct file *file, const char *buffer,
unsigned long count, void *data)
{
int value;
value = 0;
sscanf(buffer, "%d", &value);
printk("value = %d\n",value);
if (value == 0)//485 1 rx
{
gpio_direction_output(EXYNOS4_GPX1(4), 0);
}
else if (value == 1) //485 1 tx
{
gpio_direction_output(EXYNOS4_GPX1(4), 1);
}
else if (value == 2)//485 2 rx
{
gpio_direction_output(EXYNOS4_GPX1(6), 0);
}
else if (value == 3)//485 2 tx
{
gpio_direction_output(EXYNOS4_GPX1(6), 1);
}
return count;
}
static int s3c_button_probe(struct platform_device *pdev)
{
int i;
for(i=0; i<MAX_BUTTON_CNT; i++) {
gpio_request(s3c_key_para[i].key_pin, "s3c-button");
s3c_gpio_setpull(s3c_key_para[i].key_pin, S3C_GPIO_PULL_UP);
gpio_direction_input(s3c_key_para[i].key_pin);
}
input = input_allocate_device();
if(!input)
return -ENOMEM;
set_bit(EV_KEY, input->evbit);
//set_bit(EV_REP, input->evbit); /* Repeat Key */
for(i = 0; i < MAX_BUTTON_CNT; i++)
set_bit(s3c_key_para[i].key_code, input->keybit);
input->name = "s3c-button";
input->phys = "s3c-button/input0";
input->id.bustype = BUS_HOST;
input->id.vendor = 0x0001;
input->id.product = 0x0001;
input->id.version = 0x0100;
input->keycode = s3c_Keycode;
input->keycodemax = ARRAY_SIZE(s3c_Keycode);
input->keycodesize = sizeof(s3c_Keycode[0]);
if(input_register_device(input) != 0)
{
printk("s3c-button input register device fail!!\n");
input_free_device(input);
return -ENODEV;
}
regproc_init();
wake_lock_init(&s_wakelock, WAKE_LOCK_SUSPEND, "rp-wakelock");
wake_lock(&s_wakelock);
/* Scan timer init */
init_timer(&timer);
timer.function = s3cbutton_timer_handler;
timer.expires = jiffies + (HZ/20);
add_timer(&timer);
root_entry = proc_mkdir("rp_button", &proc_root);
if(root_entry)
{
entry = create_proc_entry("button_ctrl" ,0666, root_entry);
if(entry)
{
entry->write_proc = button_proc_write;
entry->read_proc = button_proc_read;
entry->data = (void*)0;
}
entry = create_proc_entry("485_ctrl" ,0666, root_entry);
if(entry)
{
entry->write_proc = RS485_proc_write;
entry->read_proc = NULL;
entry->data = (void*)0;
}
}
printk("s3c button Initialized!!\n");
return 0;
}
static void s3c_button_shutdown(struct platform_device *pdev)
{
// writel(0x5200, S5P_PS_HOLD_CONTROL);
// while(1);
}
static int s3c_button_remove(struct platform_device *pdev)
{
int i;
printk("****%s****\n",__func__);
input_unregister_device(input);
del_timer(&timer);
for(i=0; i<MAX_BUTTON_CNT; i++) {
gpio_free(s3c_key_para[i].key_pin);
}
return 0;
}
#ifdef CONFIG_PM
static int s3c_button_suspend(struct platform_device *pdev, pm_message_t state)
{
printk("s3c_button_suspend!!\n");
return 0;
}
static int s3c_button_resume(struct platform_device *pdev)
{
printk("s3c_button_resume!!\n");
return 0;
}
#else
#define s3c_button_suspend NULL
#define s3c_button_resume NULL
#endif
static struct platform_driver s3c_button_device_driver = {
.probe = s3c_button_probe,
.remove = s3c_button_remove,
.suspend = s3c_button_suspend,
.resume = s3c_button_resume,
.shutdown = s3c_button_shutdown,
.driver = {
.name = "s3c-button",
.owner = THIS_MODULE,
}
};
static struct platform_device s3c_device_button = {
.name = "s3c-button",
.id = -1,
};
static int __init s3c_button_init(void)
{
platform_device_register(&s3c_device_button);
return platform_driver_register(&s3c_button_device_driver);
}
static void __exit s3c_button_exit(void)
{
platform_driver_unregister(&s3c_button_device_driver);
platform_device_unregister(&s3c_device_button);
remove_proc_entry(PROC_NAME, &proc_root);
}
module_init(s3c_button_init);
module_exit(s3c_button_exit);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("rongpin");
MODULE_DESCRIPTION("Keyboard driver for s3c button.");
MODULE_ALIAS("platform:s3c-button");
