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t = request_mem_region(MKG_MEM_BASE, MKG_MEM_LEN, "ip_mkg");
146.
147. //===ioremap mkg registers
148.
149. g_mkg_mem_base = ioremap(MKG_MEM_BASE,MKG_MEM_LEN);
150. if(NULL == g_mkg_mem_base)
151. {
152. printk(KERN_ERR "mkg ioremap error!\n");
153. return -1;
154. }
155. else
156. {
157. ;//printk("mkg ioremap addr:%d!\n",g_mkg_mem_base);
158. }
159.
160. printk("mkg module init done!\n");
161.
162. iowrite32(0x1,g_mkg_mem_base);
163. printk("mkg write1!\n");
164. iowrite32(0x2,g_mkg_mem_base+4);
165. printk("mkg write2!\n");
166.
167. while(loop--)
168. printk("======%d======read:%d\n",loop,ioread32(g_mkg_mem_base+4*loop));
169.
170. return 0;
171.}
172.
173.void cleanup_module()
174.{
175. release_mem_region(MKG_MEM_BASE, MKG_MEM_LEN);
176.
177. unregister_chrdev(MAJOR_NUM, DEVICE_NAME);
178.}
179.
180.MODULE_LICENSE("GPL");
181.MODULE_AUTHOR("Rill zhen:rill_zhen@126.com");
/*
*
* rill mkg driver
*
*/
#include <linux/vmalloc.h>
#include <linux/slab.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/fs.h>
#include <asm/uaccess.h> /* get_user and put_user */
//#include <linux/clk.h>
//#include <linux/ioport.h>
#include <asm/io.h> /*ioremap*/
#include <linux/platform_device.h> /*cleanup_module*/
#include "ip_mkg.h" 论文网
void __iomem *g_mkg_mem_base = NULL;
static int device_open(struct inode *inode, struct file *file)
{
g_mkg_mem_base = ioremap(MKG_MEM_BASE,MKG_MEM_LEN);
if(NULL == g_mkg_mem_base)
{
printk(KERN_ERR "mkg open ioremap error!\n");
return -1;
}
else
{
printk("mkg ioremap addr:%d!\n",(int)g_mkg_mem_base);
}
return 0;
}
static int device_release(struct inode *inode, struct file *file)
{
return 0;
}
static ssize_t device_read(struct file *filp, char *buffer, size_t length, loff_t *offset)
{
/*int ret_val = 0;
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