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#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/device.h>
#include <linux/platform_device.h>
#include <mach/eint_drv.h>
static struct mt_eint_driver mt_eint_drv = {
.driver = {
.driver = {
.name = "eint",
.bus = &platform_bus_type,
.owner = THIS_MODULE,
},
},
};
static unsigned int cur_eint_num;
struct mt_eint_driver *get_mt_eint_drv(void)
{
return &mt_eint_drv;
}
static ssize_t cur_eint_show(struct device_driver *driver, char *buf)
{
return snprintf(buf, PAGE_SIZE, "%d\n", cur_eint_num);
}
static ssize_t cur_eint_store(struct device_driver *driver, const char *buf, size_t count)
{
char *p = (char *)buf;
unsigned int num;
num = simple_strtoul(p, &p, 10);
if (mt_eint_drv.eint_max_channel) {
if (num >= mt_eint_drv.eint_max_channel()) {
pr_err("Invalid EINT number %d from user space", num);
} else {
cur_eint_num = num;
}
} else {
pr_err("mt_eint_drv.eint_max_channel is NULL");
}
return count;
}
DRIVER_ATTR(current_eint, 0664, cur_eint_show, cur_eint_store);
static ssize_t cur_eint_sens_show(struct device_driver *driver, char *buf)
{
if (mt_eint_drv.get_sens) {
return snprintf(buf, PAGE_SIZE, "%d\n", mt_eint_drv.get_sens(cur_eint_num));
} else {
pr_err("mt_eint_drv.get_sens is NULL");
return snprintf(buf, PAGE_SIZE, "ERROR");
}
}
static ssize_t cur_eint_sens_store(struct device_driver *driver, const char *buf, size_t count)
{
char *p = (char *)buf;
int sens;
sens = simple_strtoul(p, &p, 10);
if (sens != 1 && sens != 0) {
pr_err("Invalid value: %d", sens);
return count;
}
if (mt_eint_drv.set_sens && mt_eint_drv.is_disable
&& mt_eint_drv.disable && mt_eint_drv.enable) {
/*
* No lock is used here.
* It is assumed that other drivers won't use the same EINT at the same time.
* The user should note this assumption.
*/
if (mt_eint_drv.is_disable(cur_eint_num)) {
mt_eint_drv.set_sens(cur_eint_num, sens);
} else {
mt_eint_drv.disable(cur_eint_num);
mt_eint_drv.set_sens(cur_eint_num, sens);
mt_eint_drv.enable(cur_eint_num);
}
} else {
pr_err("Fail to set EINT sensitivity");
}
return count;
}
DRIVER_ATTR(current_eint_sens, 0644, cur_eint_sens_show, cur_eint_sens_store);
static ssize_t cur_eint_pol_show(struct device_driver *driver, char *buf)
{
if (mt_eint_drv.get_polarity) {
return snprintf(buf, PAGE_SIZE, "%d\n", mt_eint_drv.get_polarity(cur_eint_num));
} else {
pr_err("mt_eint_drv.get_polarity is NULL");
return snprintf(buf, PAGE_SIZE, "ERROR");
}
}
static ssize_t cur_eint_pol_store(struct device_driver *driver, const char *buf, size_t count)
{
char *p = (char *)buf;
int pol;
pol = simple_strtoul(p, &p, 10);
if (pol != 1 && pol != 0) {
pr_err("Invalid value: %d\n", pol);
return count;
}
if (mt_eint_drv.set_polarity && mt_eint_drv.is_disable
&& mt_eint_drv.disable && mt_eint_drv.enable) {
/*
* No lock is used here.
* It is assumed that other drivers won't use the same EINT at the same time.
* The user should note this assumption.
*/
if (mt_eint_drv.is_disable(cur_eint_num)) {
mt_eint_drv.set_polarity(cur_eint_num, pol);
} else {
mt_eint_drv.disable(cur_eint_num);
mt_eint_drv.set_polarity(cur_eint_num, pol);
mt_eint_drv.enable(cur_eint_num);
}
} else {
pr_err("Fail to set EINT polarity");
}
return count;
}
DRIVER_ATTR(current_eint_pol, 0644, cur_eint_pol_show, cur_eint_pol_store);
static ssize_t cur_eint_deb_show(struct device_driver *driver, char *buf)
{
if (mt_eint_drv.get_debounce_cnt) {
return snprintf(buf, PAGE_SIZE, "%d\n", mt_eint_drv.get_debounce_cnt(cur_eint_num));
} else {
pr_err("mt_eint_drv.get_debounce_cnt is NULL");
return snprintf(buf, PAGE_SIZE, "ERROR");
}
}
static ssize_t cur_eint_deb_store(struct device_driver *driver, const char *buf, size_t count)
{
char *p = (char *)buf;
unsigned int cnt;
cnt = simple_strtoul(p, &p, 10);
if (mt_eint_drv.set_debounce_cnt && mt_eint_drv.is_disable
&& mt_eint_drv.disable && mt_eint_drv.enable) {
/*
* No lock is used here.
* It is assumed that other drivers won't use the same EINT at the same time.
* The user should note this assumption.
*/
if (mt_eint_drv.is_disable(cur_eint_num)) {
mt_eint_drv.set_debounce_cnt(cur_eint_num, cnt);
} else {
mt_eint_drv.disable(cur_eint_num);
mt_eint_drv.set_debounce_cnt(cur_eint_num, cnt);
mt_eint_drv.enable(cur_eint_num);
}
} else {
pr_err("Fail to set EINT debounce time");
}
return count;
}
DRIVER_ATTR(current_eint_deb, 0644, cur_eint_deb_show, cur_eint_deb_store);
static ssize_t cur_eint_deb_en_show(struct device_driver *driver, char *buf)
{
if (mt_eint_drv.is_debounce_en) {
return snprintf(buf, PAGE_SIZE, "%d\n", mt_eint_drv.is_debounce_en(cur_eint_num));
} else {
pr_err("mt_eint_drv.is_debounce_en is NULL");
return snprintf(buf, PAGE_SIZE, "ERROR");
}
}
static ssize_t cur_eint_deb_en_store(struct device_driver *driver, const char *buf, size_t count)
{
char *p = (char *)buf;
unsigned int enable;
enable = simple_strtoul(p, &p, 10);
if (enable != 1 && enable != 0) {
pr_err("Invalid value: %d", enable);
return count;
}
if (mt_eint_drv.enable_debounce && mt_eint_drv.disable_debounce
&& mt_eint_drv.is_disable && mt_eint_drv.disable && mt_eint_drv.enable) {
/*
* No lock is used here.
* It is assumed that other drivers won't use the same EINT at the same time.
* The user should note this assumption.
*/
if (mt_eint_drv.is_disable(cur_eint_num)) {
if (enable) {
mt_eint_drv.enable_debounce(cur_eint_num);
} else {
mt_eint_drv.disable_debounce(cur_eint_num);
}
} else {
mt_eint_drv.disable(cur_eint_num);
if (enable) {
mt_eint_drv.enable_debounce(cur_eint_num);
} else {
mt_eint_drv.disable_debounce(cur_eint_num);
}
mt_eint_drv.enable(cur_eint_num);
}
} else {
pr_err("Fail to set EINT debounce");
}
return count;
}
DRIVER_ATTR(current_eint_deb_en, 0644, cur_eint_deb_en_show, cur_eint_deb_en_store);
#if defined(EINT_DRV_TEST)
static ssize_t current_eint_enable_show(struct device_driver *driver, char *buf)
{
if (mt_eint_drv.is_disable) {
return snprintf(buf, PAGE_SIZE, "%s",
mt_eint_drv.is_disable(cur_eint_num) ? "disable" : "enable");
} else {
pr_err("mt_eint_drv.is_disable is NULL");
return snprintf(buf, PAGE_SIZE, "ERROR");
}
}
static ssize_t current_eint_enable_store(struct device_driver *driver,
const char *buf, size_t count)
{
if (mt_eint_drv.enable) {
mt_eint_drv.enable(cur_eint_num);
if (mt_eint_drv.is_disable(cur_eint_num)) {
pr_crit("EINT %d should be enabled but it is still disabled", cur_eint_num);
}
} else {
pr_err("mt_eint_drv.enable is NULL");
}
return count;
}
DRIVER_ATTR(current_eint_enable, 0644, current_eint_enable_show, current_eint_enable_store);
static ssize_t current_eint_disable_show(struct device_driver *driver, char *buf)
{
if (mt_eint_drv.is_disable) {
return snprintf(buf, PAGE_SIZE, "%s",
mt_eint_drv.is_disable(cur_eint_num) ? "disable" : "enable");
} else {
pr_err("mt_eint_drv.is_disable is NULL");
return snprintf(buf, PAGE_SIZE, "ERROR");
}
}
static ssize_t current_eint_disable_store(struct device_driver *driver,
const char *buf, size_t count)
{
if (mt_eint_drv.disable) {
mt_eint_drv.disable(cur_eint_num);
} else {
pr_err("mt_eint_drv.enable is NULL");
}
return count;
}
DRIVER_ATTR(current_eint_disable, 0644, current_eint_disable_show, current_eint_disable_store);
#endif
static int __init eint_drv_init(void)
{
int ret;
ret = driver_register(&mt_eint_drv.driver.driver);
if (ret) {
pr_err("Fail to register mt_eint_drv");
}
ret = driver_create_file(&mt_eint_drv.driver.driver, &driver_attr_current_eint);
ret |= driver_create_file(&mt_eint_drv.driver.driver, &driver_attr_current_eint_sens);
ret |= driver_create_file(&mt_eint_drv.driver.driver, &driver_attr_current_eint_pol);
ret |= driver_create_file(&mt_eint_drv.driver.driver, &driver_attr_current_eint_deb);
ret |= driver_create_file(&mt_eint_drv.driver.driver, &driver_attr_current_eint_deb_en);
if (ret) {
pr_err("Fail to create mt_eint_drv sysfs files");
}
#if defined(EINT_DRV_TEST)
ret = driver_create_file(&mt_eint_drv.driver.driver, &driver_attr_current_eint_enable);
ret |= driver_create_file(&mt_eint_drv.driver.driver, &driver_attr_current_eint_disable);
if (ret) {
pr_err("Fail to create EINT sysfs files");
}
#endif
return 0;
}
arch_initcall(eint_drv_init);
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