//#include <linux/config.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/sched.h>
#include <linux/wait.h>
#include <linux/kernel.h> /* printk() */
#include <linux/slab.h> /* kmalloc() */
#include <linux/fs.h> /* everything... */
#include <linux/errno.h> /* error codes */
#include <linux/types.h> /* size_t */
#include <linux/mm.h>
#include <linux/kdev_t.h>
#include <asm/page.h>
#include <linux/cdev.h>
#include <asm/io.h>
#include <linux/device.h>
#include <linux/delay.h>
#include <asm/uaccess.h>
#include "LED_Config.h"
//static wait_queue_head_t time_wait;
static int LED_Config_major = LED_CONFIG_MAJOR;
module_param(LED_Config_major, int, 0);
MODULE_AUTHOR("Wu dequan");
MODULE_LICENSE("GPL");
/*
* Set up the cdev structure for a device.
*/
static void LED_Config_setup_cdev(struct cdev *dev, int minor,
struct file_operations *fops)
{
int err, devno = MKDEV(LED_Config_major, minor);
cdev_init(dev, fops);
dev->owner = THIS_MODULE;
dev->ops = fops;
err = cdev_add (dev, devno, 1);
/* Fail gracefully if need be */
if (err)
printk (KERN_NOTICE "Error %d adding MCU_info%d", err, minor);
}
static int LED_Config_open(struct inode *inode, struct file *file)
{
//PDEBUG("LED_Config opened OK!!!\n");
return 0;
}
static int LED_Config_release(struct inode *inode, struct file *file)
{
//PDEBUG("LED_Config closed OK!!!\n");
return 0;
}
static int LED_Config_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
unsigned long arg)
{
// unsigned char TempData;
unsigned long TempRegister;
printk (KERN_NOTICE "Comand no = %d\n", cmd);
// PDEBUG("LED_Config: command no = %d\n", cmd);
switch (cmd) {
/*
case LED_Config_IOC_Setting:
if (get_user(TempData, (char *)arg))
return -EFAULT;
TempData = TempData & 0xff;
PDEBUG ("Tempdata = 0x%x \n",TempData);
if((TempData & 0xf) >= ((unsigned char)LED_Config_Data_fail))
return -EFAULT;
if ((TempData & 0xf0) != ((unsigned char)LED_low_Data_fail))
return -EFAULT;
TempRegister = inb(GPIO_status_register_address);
TempRegister = TempRegister & 0xfc;
TempRegister = TempRegister + (TempData & 0x03);
outb(TempRegister, GPIO_status_register_address);
return 0;
*/
case LED_PRE_ON:
TempRegister = inl (GPIO_BLINK_ENABLE_REGISTER);
TempRegister = TempRegister & (~(1<<25));
outl(TempRegister,GPIO_BLINK_ENABLE_REGISTER);
TempRegister = inl(LED_ADDRESS);
TempRegister = TempRegister & (~(1<<25));
outl(TempRegister,LED_ADDRESS);
break;
case LED_PRE_OFF:
TempRegister = inl (GPIO_BLINK_ENABLE_REGISTER);
TempRegister = TempRegister & (~(1<<25));
outl(TempRegister,GPIO_BLINK_ENABLE_REGISTER);
TempRegister = inl(LED_ADDRESS);
TempRegister = TempRegister | (1<<25);
outl(TempRegister,LED_ADDRESS);
break;
case LED_PRE_BLINK:
TempRegister = inl (GPIO_BLINK_ENABLE_REGISTER);
TempRegister = TempRegister | (1<<25);
outl(TempRegister,GPIO_BLINK_ENABLE_REGISTER);
break;
case LED_COM_ON:
TempRegister = inl (GPIO_BLINK_ENABLE_REGISTER);
TempRegister = TempRegister & (~(1<<23));
outl(TempRegister,GPIO_BLINK_ENABLE_REGISTER);
TempRegister = inl(LED_ADDRESS);
TempRegister = TempRegister & (~(1<<23));
outl(TempRegister,LED_ADDRESS);
break;
case LED_COM_OFF:
TempRegister = inl (GPIO_BLINK_ENABLE_REGISTER);
TempRegister = TempRegister & (~(1<<23));
outl(TempRegister,GPIO_BLINK_ENABLE_REGISTER);
TempRegister = inl(LED_ADDRESS);
TempRegister = TempRegister | (1<<23);
outl(TempRegister,LED_ADDRESS);
break;
case LED_COM_BLINK:
TempRegister = inl (GPIO_BLINK_ENABLE_REGISTER);
TempRegister = TempRegister | (1<<23);
outl(TempRegister,GPIO_BLINK_ENABLE_REGISTER);
break;
default:
return -EINVAL;
}
return 0;
}
/* Device MCU_info uses Operation */
static struct file_operations LED_Config_remap_ops = {
.owner = THIS_MODULE,
.ioctl = LED_Config_ioctl,
.open = LED_Config_open,
.release= LED_Config_release
};
/*
* We export two MCU_info devices. There's no need for us to maintain any
* special housekeeping info, so we just deal with raw cdevs.
*/
#define MAX_LED_Config_DEV 2
static struct cdev LED_ConfigDevs[MAX_LED_Config_DEV];
static int LED_Config_init(void)
{
int result;
unsigned long TempRegister;
dev_t dev = MKDEV(LED_Config_major, 0);
/* Figure out our device number. */
if (LED_Config_major)
result = register_chrdev_region(dev, 1, "LED_Config");
else {
result = alloc_chrdev_region(&dev, 0, 1, "LED_Config");
LED_Config_major = MAJOR(dev);
}
if (result < 0) {
printk(KERN_WARNING "LED_Config: unable to get major %d\n", LED_Config_major);
return result;
}
printk (KERN_NOTICE "init success!");
if (LED_Config_major == 0)
LED_Config_major = result;
//PDEBUG("LED_Config: Major device No. is %d\n", LED_Config_major);
/* Now set up one cdevs. */
LED_Config_setup_cdev(LED_ConfigDevs, 0, &LED_Config_remap_ops);
TempRegister = inl(GPIO_base_address+0x04);
TempRegister = TempRegister & (~(1<<25));
outl (TempRegister,GPIO_base_address+0x04);
TempRegister = inl(LED_ADDRESS);
TempRegister =TempRegister | (1<<23) | (1<<25);
outl(TempRegister , LED_ADDRESS);
// TempRegister = inb(GPIO_config_register_address);
// TempRegister = TempRegister & 0xfc;
// outb(TempRegister, GPIO_config_register_address);
// TempRegister = inb(GPIO_status_register_address);
// TempRegister = TempRegister | 0x03;
// outb(TempRegister, GPIO_status_register_address);
return 0;
}
static void LED_Config_cleanup(void)
{
cdev_del(LED_ConfigDevs);
unregister_chrdev_region(MKDEV(LED_Config_major, 0), 1);
}
module_init(LED_Config_init);
module_exit(LED_Config_cleanup);
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Linux_Led_Driver.zip_linux X86 led_x86 driver
共9个文件
h:2个
makefile:2个
c:2个
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2022-09-20
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基于X86系统的Linux下的LED driver开发的example code, 并附带有相应的测试程序。
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Linux_Led_Driver.zip (9个子文件)
www.pudn.com.txt 218B
Linux_Led_Driver
loadmoudle 792B
Module.symvers 0B
test
LED_Config.h 1KB
VCILED_test.c 2KB
Makefile 319B
LED_Config.h 1KB
Makefile 194B
LED_Config.c 6KB
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