Merge branch 'master' of git.ajou.ac.kr:hyunjun/system_programming

hydro/Makefile

+KERNEL_VER := $(shell uname -r)
+KERNEL_DIR = '/lib/modules/$(KERNEL_VER)/build'
+
+obj-m := hydro_dev.o
+
+PWD := $(shell pwd)
+
+all :
+	make -C $(KERNEL_DIR) M=$(PWD) modules
+
+clean :
+	make -C $(KERNEL_DIR) M=$(PWD) clean
+
+in :
+	sudo insmod hydro_dev.ko
+	sudo mknod -m 666 /dev/hydro c 505 0
+
+out : 
+	sudo rmmod hydro_dev
+
+in2 :
+	sudo insmod hydro_dev.ko

hydro/hydro_dev.c

+#include <linux/init.h> 
+#include <linux/kernel.h> 
+#include <linux/module.h> 
+#include <linux/fs.h> 
+#include <linux/uaccess.h> 
+#include <linux/slab.h> 
+#include <linux/delay.h>
+
+#include <asm/mach/map.h> 
+#include <asm/uaccess.h> 
+
+typedef struct{
+   unsigned int hydro_integer;
+   unsigned int hydro_float;
+   unsigned int temp_integer;
+   unsigned int temp_float;
+}Data;
+
+#define HIGH                    1   
+#define LOW                     0
+
+#define HYDRO_MAJOR_NUMBER   505
+#define HYDRO_DEV_NAME         "hydro_dev" 
+
+#define IOCTL_HYDRO_MAGIC_NUMBER    'h'
+#define IOCTL_CMD_HYDRO      _IOR(IOCTL_HYDRO_MAGIC_NUMBER, 0, Data)
+
+#define GPIO_BASE_ADDRESS       0x3F200000
+
+#define GPFSEL0                  0x00
+#define GPFSEL1			0x04
+#define GPSET1                  0x1C
+#define GPCLR1                  0x28
+#define GPLEV1                  0x34
+
+static void __iomem* gpio_base;
+
+volatile unsigned int* gpsel0;
+volatile unsigned int* gpsel1;
+volatile unsigned int* gpset1;
+volatile unsigned int* gpclr1;
+volatile unsigned int* gplev1;
+
+int hydro_open(struct inode * inode, struct file * filp){
+    printk(KERN_ALERT "humidity driver open\n"); 
+    gpio_base = ioremap(GPIO_BASE_ADDRESS, 0xFF);
+    
+    gpsel0 = (volatile unsigned int*)(gpio_base + GPFSEL0);
+    gpsel1 = (volatile unsigned int*)(gpio_base + GPFSEL1);
+    gpset1 = (volatile unsigned int*)(gpio_base + GPSET1);
+    gpclr1 = (volatile unsigned int*)(gpio_base + GPCLR1);
+    gplev1 = (volatile unsigned int*)(gpio_base + GPLEV1);
+
+    return 0; 
+}
+
+int hydro_release(struct inode * inode, struct file * filp) { 
+    printk(KERN_ALERT "humidity driver closed\n\n"); 
+    iounmap((void *)gpio_base); 
+    return 0; 
+}
+
+
+long hydro_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
+{ 
+    Data data;
+    int result[5] = {0};
+    int index = 0;
+    int counter = 0;
+    int i = 0;
+    switch (cmd){ 
+        case IOCTL_CMD_HYDRO: 
+
+            *gpsel0 |= (1 << 12);    
+
+            *gpset1 |= (1 << 4); 
+            mdelay(800);         
+
+            *gpclr1 |= (1 << 4); 
+            mdelay(18);           
+
+            *gpset1 |= (1 << 4);   
+            udelay(30);             
+
+           *gpsel0 &=  ~(1 << 12);       
+
+            for(i = 0; i < 3; i++){
+                if(((*gplev1 >> 4) & 0x01) == LOW){
+                    while(((*gplev1 >> 4) & 0x01) == LOW){} continue;
+                }
+                if(((*gplev1 >> 4) & 0x01) == HIGH){
+                    while(((*gplev1 >> 4) & 0x01) == HIGH){} continue;
+                }
+            }
+           
+           while(index < 40){
+                if(((*gplev1 >> 4) & 0x01) == LOW) 
+			continue;
+              	counter = 0;
+              	while(((*gplev1 >> 4) & 0x01) == HIGH){
+                 	counter++;
+                 	udelay(1);
+                }
+                if(counter > 80) 
+		  	break;
+                result[index / 8] <<= 1;
+                if(counter > 28) result[index / 8] |= 1;
+                 	index++;
+           }
+
+            if(result[4] != ((result[0] + result[1] + result[2] + result[3]) & 0xFF))
+                break;
+            data.hydro_integer = result[0];	data.hydro_float = result[1];
+            data.temp_integer = result[2];	data.temp_float = result[3];
+
+            copy_to_user((void*)arg, (void*)&data, sizeof(data));
+	    printk(KERN_ALERT "hydro done\n"); 
+            break; 
+
+        default : 
+            printk(KERN_ALERT "cannot hydro device driver\n");
+    }
+    
+    return 0; 
+}
+
+static struct file_operations hydro_fops = { 
+    .owner = THIS_MODULE,  
+    .open = hydro_open, 
+    .release = hydro_release,
+    .unlocked_ioctl = hydro_ioctl
+}; 
+
+int __init hydro_init (void) { 
+    if(register_chrdev(HYDRO_MAJOR_NUMBER, HYDRO_DEV_NAME, &hydro_fops) < 0)
+        printk(KERN_ALERT "hydro driver initalization failed\n"); 
+    else 
+        printk(KERN_ALERT "hydro driver initalization succeed\n");
+    return 0; 
+}
+
+void __exit hydro_exit(void){ 
+    unregister_chrdev(HYDRO_MAJOR_NUMBER, HYDRO_DEV_NAME); 
+    printk(KERN_ALERT "hydro driver exit"); 
+}
+
+module_init(hydro_init); 
+module_exit(hydro_exit);  
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("joreka"); 
+MODULE_DESCRIPTION("hydro_dev");
+

hydro/hydro_dev.mod.c

+#include <linux/build-salt.h>
+#include <linux/module.h>
+#include <linux/vermagic.h>
+#include <linux/compiler.h>
+
+BUILD_SALT;
+
+MODULE_INFO(vermagic, VERMAGIC_STRING);
+MODULE_INFO(name, KBUILD_MODNAME);
+
+__visible struct module __this_module
+__attribute__((section(".gnu.linkonce.this_module"))) = {
+	.name = KBUILD_MODNAME,
+	.init = init_module,
+#ifdef CONFIG_MODULE_UNLOAD
+	.exit = cleanup_module,
+#endif
+	.arch = MODULE_ARCH_INIT,
+};
+
+#ifdef CONFIG_RETPOLINE
+MODULE_INFO(retpoline, "Y");
+#endif
+
+static const struct modversion_info ____versions[]
+__used
+__attribute__((section("__versions"))) = {
+	{ 0xad1a7def, "module_layout" },
+	{ 0x6bc3fbc0, "__unregister_chrdev" },
+	{ 0xcfc78319, "__register_chrdev" },
+	{ 0xdb7305a1, "__stack_chk_fail" },
+	{ 0xf4fa543b, "arm_copy_to_user" },
+	{ 0x8e865d3c, "arm_delay_ops" },
+	{ 0x8f678b07, "__stack_chk_guard" },
+	{ 0xedc03953, "iounmap" },
+	{ 0x2e5810c6, "__aeabi_unwind_cpp_pr1" },
+	{ 0xe97c4103, "ioremap" },
+	{ 0x7c32d0f0, "printk" },
+	{ 0xb1ad28e0, "__gnu_mcount_nc" },
+};
+
+static const char __module_depends[]
+__used
+__attribute__((section(".modinfo"))) =
+"depends=";
+
+
+MODULE_INFO(srcversion, "5D363F4F7E70F2B2C459F60");

hydro/modules.order

+kernel//home/pi/Desktop/project/hydro/hydro_dev.ko

smoke/.smoke_dev.ko.cmd

+cmd_/home/pi/Desktop/project/smoke/smoke_dev.ko := ld -r  -EL -T ./scripts/module-common.lds -T ./arch/arm/kernel/module.lds  --build-id  -o /home/pi/Desktop/project/smoke/smoke_dev.ko /home/pi/Desktop/project/smoke/smoke_dev.o /home/pi/Desktop/project/smoke/smoke_dev.mod.o ;  true

smoke/.tmp_versions/smoke_dev.mod

+/home/pi/Desktop/project/smoke/smoke_dev.ko
+/home/pi/Desktop/project/smoke/smoke_dev.o
+

smoke/Makefile

+KERNEL_VER := $(shell uname -r)
+KERNEL_DIR = '/lib/modules/$(KERNEL_VER)/build'
+
+obj-m := smoke_dev.o
+
+PWD := $(shell pwd)
+
+all:
+	make -C $(KERNEL_DIR) M=$(PWD) modules
+
+clean:
+	make -C $(KERNEL_DIR) M=$(PWD) clean

smoke/app.c

+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+int main() {
+	int fd = open("/dev/smoke_dev", O_RDWR);
+
+	int data = 0;
+
+	while(1) {
+		read(fd, &data, sizeof(data));
+		printf("%d\n", data);
+		sleep(1);
+	}
+
+	close(fd);
+
+	return 0;
+
+}
+
+

smoke/modules.order

+kernel//home/pi/Desktop/project/smoke/smoke_dev.ko