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#include <linux/init.h>
#include <linux/module.h>
#include <linux/types.h>
#include <linux/fs.h>
#include <linux/proc_fs.h>
#include <linux/device.h>
#include <linux/kmsg_dump.h>
#include <linux/reboot.h>
#include <linux/uaccess.h>
#include <mach/system.h>
#include <linux/mm.h>
#include <linux/vmalloc.h>
#include <linux/slab.h>
#include "srtpm.h"
static void srtpm_poweroff()
{
printk(KERN_ALERT "Power down.\n");
if (pm_power_off)pm_power_off();
}
static ssize_t __srtpm_get_val(char *buf, int len)
{
int val = 0;
return snprintf(buf, len, "%d\n", val);
}
static ssize_t __srtpm_set_val(const char *buf, size_t count)
{
int val = 0;
val = kstrtol(buf, NULL, 10);
if (val == 1)srtpm_poweroff();
return count;
}
static ssize_t srtpm_proc_read(char *page, char **start, off_t off, int count,
int *eof, void *data)
{
if (off > 0) {
*eof = 1;
return 0;
}
return __srtpm_get_val(page, count);
}
static ssize_t srtpm_proc_write(struct file *filp, const char __user * buff,
unsigned long len, void *data)
{
int err = 0;
char *page = NULL;
if (len > PAGE_SIZE) {
printk(KERN_ALERT "The buff is too large:%lu.\n", len);
return -EFAULT;
}
page = (char *)kmalloc(len, GFP_KERNEL);
if (!page) {
printk(KERN_ALERT "Failed to alloc page.\n");
return -ENOMEM;
}
if (copy_from_user(page, buff, len)) {
printk(KERN_ALERT "Failed to copy buff from user.\n");
err = -EFAULT;
goto out;
}
err = __srtpm_set_val(page, len);
out:
kfree(page);
return err;
}
static const struct file_operations proc_srtpm_operations = {
.owner = THIS_MODULE,
.write = srtpm_proc_write,
.read = srtpm_proc_read,
};
static void srtpm_create_proc(void)
{
struct proc_dir_entry *entry;
entry = proc_create(SRTPM_DEVICE_PROC_NAME, 0, NULL, &proc_srtpm_operations);
}
static void srtpm_remove_proc(void)
{
remove_proc_entry(SRTPM_DEVICE_PROC_NAME, NULL);
}
static int __init srtpm_init(void)
{
srtpm_create_proc();
printk(KERN_ALERT "Successed to initialize srtpm device.\n");
return 0;
}
static void __exit srtpm_exit(void)
{
printk(KERN_ALERT "Destroy srtpm device.\n");
srtpm_remove_proc();
}
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("First Android Device");
module_init(srtpm_init);
module_exit(srtpm_exit);
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