简单的Framebuffer驱动
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简单的Framebuffer驱动
/*
*sed1335fb.c -- Driver for sed1335 lcd control framebuffer device
*
******************************************************************************/
＃i nclude <linux/config.h>
＃i nclude <linux/types.h>
＃i nclude <linux/kernel.h>
＃i nclude <linux/fs.h>
＃i nclude <linux/mm.h>
＃i nclude <linux/wait.h>
＃i nclude <linux/poll.h>
＃i nclude <linux/types.h>
＃i nclude <linux/delay.h>
＃i nclude <asm/param.h>
＃i nclude <asm/dma.h>
＃i nclude <asm/irq.h>
＃i nclude <asm/coldfire.h>
＃i nclude <asm/mcfsim.h>
＃i nclude <asm/mcfdma.h>
＃i nclude <asm/mcftimer.h>
＃i nclude <linux/fb.h>
/* LCD parameters */
#define LCD_XRES 320
#define LCD_YRES 240
#define LCD_BPP 1/* Bits per pixel */
/* how many bytes per row on screen */
#define BYTES_PER_ROW (LCD_XRES/(8/LCD_BPP))
#define SED1335FB_MAJOR101
//#define LCD_REFRESH_RATE 100
#define PIO_REFRESH_TIMER_TICKS 4
#define TIMEOUT_VALUE 0x1000
#defineSED1335FB_BUFSIZE((LCD_XRES * LCD_YRES * LCD_BPP)/8 )
/*LCD controller command/status defines
* Value to use for timeout when polling for LCD controller ready */
#define LCD_CS 4
#define LCD_RST 2
#define LCD_RD 25
#define LCD_WR 26
#define LCD_A0 23
static u8 DATABUS[]={13,14,15,16,18,19,20,21};
#define SYSSET 0x40
#define SLEEP 0x53
#define DISPON 0x59
#define DISPOFF 0x58
#define SCROLL 0x44
#define CSRFORM 0x5D
#define CGRAMADR 0x50
#define CSRDIRR 0x4C
#define CSRDIRL 0x4D
#define CSRDIRU 0x4E
#define CSRDIRD 0x4F
#define HDOTSCR 0x5A
#define OVLAY0x5B
#define CSRW0x46
#define CSRR0x47
#define MWRITE0x42
#define MREAD0x43
#define MBAR2_ADDR 0x80000000
static char sysset[8] = { 0x30, 0x87, 0x07, 0x27, 0x42, 0xef, 0x28, 0x00 };
static char scroll[10] =
{ 0x00, 0x00, 0xf0, 0x00, 0x40, 0xf0, 0x00, 0x80, 0x00, 0x00 };
/* Frame buffer memory */
unsigned char sed1335fb_buff[SED1335FB_BUFSIZE];
unsigned char tmp_buff[SED1335FB_BUFSIZE];
/* Globals */
struct fb_fix_screeninfo fix;
struct timer_list pio_timer;
void setbit(u8 n,u8 v)
{
#ifdef DIRECT
if(v==0)
*(volatile unsigned int *)(MBAR2_ADDR+0x04)&=~(1<<n);
else
*(volatile unsigned int *)(MBAR2_ADDR+0x04)|=(1<<n);
#else
if(v==1)
*(volatile unsigned int *)(MBAR2_ADDR+0x04)&=~(1<<n);
else
*(volatile unsigned int *)(MBAR2_ADDR+0x04)|=(1<<n);
#endif
}
void init_io()
{
u32 mask;
u8 i;
/* Init I/O */
mask=0;
for(i=0;i<8;i++)
mask|=(1<<DATABUS[i]);
mask|=(1<<LCD_A0);
mask|=(1<<LCD_CS);
mask|=(1<<LCD_RD);
mask|=(1<<LCD_RST);
mask|=(1<<LCD_WR);
*(volatile u32 *)(MBAR2_ADDR+0x0C)|=mask;
*(volatile u32 *)(MBAR2_ADDR+0x08)|=mask;
#ifdef DIRECT
*(volatile u32 *)(MBAR2_ADDR+0x04)|=mask;
#else
*(volatile u32 *)(MBAR2_ADDR+0x04)&=~mask;
#endif
}
void write_data(unsigned char data)
{
unsigned int i,temp;
temp=*(volatile unsigned int *)(MBAR2_ADDR+0x04);
for(i=0;i<8;i++)
{
#ifdef DIRECT
if((data>>i)&0x01)
#else
if(!((data>>i)&0x01))
#endif
temp |= (1<<DATABUS[i]);
else
temp &= ~(1<<DATABUS[i]);
}
*(volatile unsigned int *)(MBAR2_ADDR+0x04)=temp;
setbit(LCD_A0,0);
setbit(LCD_WR,0);
setbit(LCD_WR,1);
}
/* Do command write */
void write_cmd(unsigned char data)
{
unsigned int i,temp;
temp=*(volatile unsigned int *)(MBAR2_ADDR+0x04);
for(i=0;i<8;i++)
{
#ifdef DIRECT
if((data>>i)&0x01)
#else
if(!((data>>i)&0x01))
#endif
temp |= (1<<DATABUS[i]);
else
temp &= ~(1<<DATABUS[i]);
}
*(volatile unsigned int *)(MBAR2_ADDR+0x04)=temp;
setbit(LCD_A0,1);
setbit(LCD_WR,0);
setbit(LCD_WR,1);
}
/*****************************************************************************/
/* Use PIO to copy frame buffer contents to LCD controller */
/*****************************************************************************/
void sed1335fb_pio_copy(unsigned long sed1335_pio)
{
unsigned short i;
/* Re-init refresh timer */
del_timer(&pio_timer);
pio_timer.expires = jiffies + PIO_REFRESH_TIMER_TICKS;
add_timer(&pio_timer);
/* Set cursor shift direction to right */
write_cmd(CSRDIRR);
/* Set cursor to start of the screen */
write_cmd(CSRW);
/* Prepare LCD controller to do auto mode write */
write_data(0x00);
write_data(0x00);
/* begin write data */
write_cmd(MWRITE);
for (i = 0; i < SED1335FB_BUFSIZE; i++) {
if (tmp_buff[i] != sed1335fb_buff[i]) {
write_cmd(CSRW);
write_data(((char*)&i)[1]);
write_data(((char*)&i)[0]);
write_cmd(MWRITE);
tmp_buff[i] = sed1335fb_buff[i];
write_data(sed1335fb_buff[i]);
}
}
}
/*****************************************************************************/
static ssize_t
sed1335fb_read(struct file *filp,char *buf,
size_t count,loff_t *ppos)
{
ssize_t copy_size;
char *base_addr;
if (count < 0)
return -EINVAL;
base_addr = (char *) fix.smem_start;
copy_size = (count + *ppos <= fix.smem_len ? count : fix.smem_len - *ppos);
copy_to_user(buf, base_addr + *ppos, copy_size);
return copy_size;
}
static ssize_t
sed1335fb_write(struct file *flip,const char *buf,
size_t count,loff_t *ppos)
{
int copy_size;
char *base_addr;
if (count < 0)
return -EINVAL;
base_addr = (char *) fix.smem_start;
copy_size = (count + *ppos <= fix.smem_len ? count : fix.smem_len - *ppos);
copy_from_user(base_addr + *ppos, buf, copy_size);
return copy_size;
}
//#define FILE_OP_DEBUG
static int
sed1335fb_mmap(struct file *file, struct vm_area_struct *vma)
{
#ifdef FILE_OP_DEBUG
printk("%s(%d): %s()/n", __FILE__, __LINE__, __FUNCTION__);
#endif
vma->vm_start = fix.smem_start + vma->vm_offset;
return 0;
}
int sed1335fb_open(struct inode *inode, struct file *filp)
{
#ifdef FILE_OP_DEBUG
printk("%s(%d): %s()/n", __FILE__, __LINE__, __FUNCTION__);
#endif
return (0);
}
/*****************************************************************************/
int sed1335fb_release(struct inode *inode, struct file *filp)
{
#ifdef FILE_OP_DEBUG
printk("%s(%d): %s()/n", __FILE__, __LINE__, __FUNCTION__);
#endif
return (0);
}
/*****************************************************************************/
int
sed1335fb_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
unsigned long arg)
{
struct fb_var_screeninfo var;
int rc = 0;
int i;
#ifdef FILE_OP_DEBUG
printk("%s(%d): sed1335fb_ioctl()/n", __FILE__, __LINE__);
#endif
switch (cmd) {
case FBIOGET_VSCREENINFO:
i = verify_area(VERIFY_WRITE, (void *) arg,
sizeof(struct fb_var_screeninfo));
var.xres = LCD_XRES;/* visible resolution */
var.yres = LCD_YRES;
var.xres_virtual = LCD_XRES;/* virtual resolution */
var.yres_virtual = LCD_YRES;
var.xoffset = 0;/* offset from virtual to visible */
var.yoffset = 0;/* resolution */
var.bits_per_pixel = LCD_BPP;/* guess what */
var.grayscale = 1;/* != 0 Graylevels instead of colors */
//memcpy_tofs((void *) arg, &var, sizeof(var));
copy_to_user((void *) arg, &var, sizeof(var));
break;
case FBIOGET_FSCREENINFO:
i = verify_area(VERIFY_WRITE, (void *) arg,
sizeof(struct fb_fix_screeninfo));
if (i)
return i;
//memcpy_tofs((void *) arg, &fix, sizeof(fix));
copy_to_user((void *) arg, &fix, sizeof(fix));
return i;
default:
rc = -EINVAL;
break;
}
return (rc);
}
/*
*Exported file operations structure for driver...
*/
struct file_operations sed1335fb_fops = {
read:sed1335fb_read,
write:sed1335fb_write,
ioctl:sed1335fb_ioctl,
mmap:sed1335fb_mmap,
open:sed1335fb_open,
release:sed1335fb_release,
};
/* * Setup LCD module parameters */
int lcd_init(void)
{
int i = 0;
for(i=0;i<100000;i++);
write_cmd(SYSSET);
for (i = 0; i < 8; i++)
write_data(sysset[i]);
write_cmd(SCROLL);
for (i = 0; i < 10; i++)
write_data(scroll[i]);
write_cmd(HDOTSCR);
write_data(0x00);
write_cmd(OVLAY);
write_data(0x0C);
write_cmd(DISPON);
write_data(0x54);
write_cmd(CSRDIRR);
write_cmd(CSRW);
write_data(0x00);
write_data(0x00);
write_cmd(MWRITE);
for (i = 0; i < SED1335FB_BUFSIZE; i++)
write_data(0x00);
write_cmd(CSRW);
write_data(0x00);
write_data(0x00);
write_cmd(CSRFORM);
write_data(0x07);
write_data(0x07);
write_cmd(DISPON);
write_data(0x04);
return (0);
}
void sed1335fb_init(void)
{
int result;
init_io();
/* Set CS*/
setbit(LCD_CS,0);
/* Reset Sed1335 */
setbit(LCD_RST,0);
mdelay(5);
setbit(LCD_RST,1);
/* Do LCD init */
if (lcd_init()) {
printk(/*KERN_WARNING*/
"sed1335fb: can't init LCD controller, exiting/n");
return;
}
fix.smem_start = (unsigned long) sed1335fb_buff;
fix.smem_len = SED1335FB_BUFSIZE;/* Length of frame buffer mem */
fix.type = FB_TYPE_PACKED_PIXELS;/* see FB_TYPE_* */
fix.type_aux = 0;/* Interleave for interleaved Planes */
fix.visual = FB_VISUAL_MONO01;/* see FB_VISUAL_* */
fix.xpanstep = 0;/* zero if no hardware panning */
fix.ypanstep = 0;/* zero if no hardware panning */
fix.ywrapstep = 0;/* zero if no hardware ywrap */
fix.line_length = LCD_XRES / (8 * LCD_BPP);/* length of a line in bytes */
/* Register character device */
result = register_chrdev(SED1335FB_MAJOR, "fb", &sed1335fb_fops);
if (result < 0) {
printk(KERN_WARNING "sed1335fb: can't get major %d/n",
SED1335FB_MAJOR);
return;
}
//printk("sed1335fb: using PIO mode/n");
/* Set up PIO timer */
for (result=0;result < SED1335FB_BUFSIZE;result++)
tmp_buff[result] = 0; //sed1335fb_buff[result] + 1;
pio_timer.function = sed1335fb_pio_copy;
pio_timer.expires = jiffies + PIO_REFRESH_TIMER_TICKS;
add_timer(&pio_timer);
printk("******sed1335fb_init() finished8*****/n");
}
module_init(sed1335fb_init);
//MODULE_LICENSE("GPL");
/*****************************************************************************/
[ 2005-12-1 11:41:29 | By: ericshi ]
/*****************************************************************************//*
*sed1335fb.c -- Driver for sed1335 lcd control framebuffer device
*
******************************************************************************/
＃i nclude <linux/config.h>
＃i nclude <linux/types.h>
＃i nclude <linux/kernel.h>
＃i nclude <linux/fs.h>
＃i nclude <linux/mm.h>
＃i nclude <linux/wait.h>
＃i nclude <linux/poll.h>
＃i nclude <linux/types.h>
＃i nclude <linux/delay.h>
＃i nclude <asm/param.h>
＃i nclude <asm/dma.h>
＃i nclude <asm/irq.h>
＃i nclude <asm/coldfire.h>
＃i nclude <asm/mcfsim.h>
＃i nclude <asm/mcfdma.h>
＃i nclude <asm/mcftimer.h>
＃i nclude <linux/fb.h>
/* LCD parameters */
#define LCD_XRES 320
#define LCD_YRES 240
#define LCD_BPP 1/* Bits per pixel */
/* how many bytes per row on screen */
#define BYTES_PER_ROW (LCD_XRES/(8/LCD_BPP))
#define SED1335FB_MAJOR101
//#define LCD_REFRESH_RATE 100
#define PIO_REFRESH_TIMER_TICKS 4
#define TIMEOUT_VALUE 0x1000
#defineSED1335FB_BUFSIZE((LCD_XRES * LCD_YRES * LCD_BPP)/8 )
/*LCD controller command/status defines
* Value to use for timeout when polling for LCD controller ready */
#define LCD_CS 4
#define LCD_RST 2
#define LCD_RD 25
#define LCD_WR 26
#define LCD_A0 23
static u8 DATABUS[]={13,14,15,16,18,19,20,21};
#define SYSSET 0x40
#define SLEEP 0x53
#define DISPON 0x59
#define DISPOFF 0x58
#define SCROLL 0x44
#define CSRFORM 0x5D
#define CGRAMADR 0x50
#define CSRDIRR 0x4C
#define CSRDIRL 0x4D
#define CSRDIRU 0x4E
#define CSRDIRD 0x4F
#define HDOTSCR 0x5A
#define OVLAY0x5B
#define CSRW0x46
#define CSRR0x47
#define MWRITE0x42
#define MREAD0x43
#define MBAR2_ADDR 0x80000000
static char sysset[8] = { 0x30, 0x87, 0x07, 0x27, 0x42, 0xef, 0x28, 0x00 };
static char scroll[10] =
{ 0x00, 0x00, 0xf0, 0x00, 0x40, 0xf0, 0x00, 0x80, 0x00, 0x00 };
/* Frame buffer memory */
unsigned char sed1335fb_buff[SED1335FB_BUFSIZE];
unsigned char tmp_buff[SED1335FB_BUFSIZE];
/* Globals */
struct fb_fix_screeninfo fix;
struct timer_list pio_timer;
void setbit(u8 n,u8 v)
{
#ifdef DIRECT
if(v==0)
*(volatile unsigned int *)(MBAR2_ADDR+0x04)&=~(1<<n);
else
*(volatile unsigned int *)(MBAR2_ADDR+0x04)|=(1<<n);
#else
if(v==1)
*(volatile unsigned int *)(MBAR2_ADDR+0x04)&=~(1<<n);
else
*(volatile unsigned int *)(MBAR2_ADDR+0x04)|=(1<<n);
#endif
}
void init_io()
{
u32 mask;
u8 i;
/* Init I/O */
mask=0;
for(i=0;i<8;i++)
mask|=(1<<DATABUS[i]);
mask|=(1<<LCD_A0);
mask|=(1<<LCD_CS);
mask|=(1<<LCD_RD);
mask|=(1<<LCD_RST);
mask|=(1<<LCD_WR);
*(volatile u32 *)(MBAR2_ADDR+0x0C)|=mask;
*(volatile u32 *)(MBAR2_ADDR+0x08)|=mask;
#ifdef DIRECT
*(volatile u32 *)(MBAR2_ADDR+0x04)|=mask;
#else
*(volatile u32 *)(MBAR2_ADDR+0x04)&=~mask;
#endif
}
void write_data(unsigned char data)
{
unsigned int i,temp;
temp=*(volatile unsigned int *)(MBAR2_ADDR+0x04);
for(i=0;i<8;i++)
{
#ifdef DIRECT
if((data>>i)&0x01)
#else
if(!((data>>i)&0x01))
#endif
temp |= (1<<DATABUS[i]);
else
temp &= ~(1<<DATABUS[i]);
}
*(volatile unsigned int *)(MBAR2_ADDR+0x04)=temp;
setbit(LCD_A0,0);
setbit(LCD_WR,0);
setbit(LCD_WR,1);
}
/* Do command write */
void write_cmd(unsigned char data)
{
unsigned int i,temp;
temp=*(volatile unsigned int *)(MBAR2_ADDR+0x04);
for(i=0;i<8;i++)
{
#ifdef DIRECT
if((data>>i)&0x01)
#else
if(!((data>>i)&0x01))
#endif
temp |= (1<<DATABUS[i]);
else
temp &= ~(1<<DATABUS[i]);
}
*(volatile unsigned int *)(MBAR2_ADDR+0x04)=temp;
setbit(LCD_A0,1);
setbit(LCD_WR,0);
setbit(LCD_WR,1);
}
/*****************************************************************************/
/* Use PIO to copy frame buffer contents to LCD controller */
/*****************************************************************************/
void sed1335fb_pio_copy(unsigned long sed1335_pio)
{
unsigned short i;
/* Re-init refresh timer */
del_timer(&pio_timer);
pio_timer.expires = jiffies + PIO_REFRESH_TIMER_TICKS;
add_timer(&pio_timer);
/* Set cursor shift direction to right */
write_cmd(CSRDIRR);
/* Set cursor to start of the screen */
write_cmd(CSRW);
/* Prepare LCD controller to do auto mode write */
write_data(0x00);
write_data(0x00);
/* begin write data */
write_cmd(MWRITE);
for (i = 0; i < SED1335FB_BUFSIZE; i++) {
if (tmp_buff[i] != sed1335fb_buff[i]) {
write_cmd(CSRW);
write_data(((char*)&i)[1]);
write_data(((char*)&i)[0]);
write_cmd(MWRITE);
tmp_buff[i] = sed1335fb_buff[i];
write_data(sed1335fb_buff[i]);
}
}
}
/*****************************************************************************/
static ssize_t
sed1335fb_read(struct file *filp,char *buf,
size_t count,loff_t *ppos)
{
ssize_t copy_size;
char *base_addr;
if (count < 0)
return -EINVAL;
base_addr = (char *) fix.smem_start;
copy_size = (count + *ppos <= fix.smem_len ? count : fix.smem_len - *ppos);
copy_to_user(buf, base_addr + *ppos, copy_size);
return copy_size;
}
static ssize_t
sed1335fb_write(struct file *flip,const char *buf,
size_t count,loff_t *ppos)
{
int copy_size;
char *base_addr;
if (count < 0)
return -EINVAL;
base_addr = (char *) fix.smem_start;
copy_size = (count + *ppos <= fix.smem_len ? count : fix.smem_len - *ppos);
copy_from_user(base_addr + *ppos, buf, copy_size);
return copy_size;
}
//#define FILE_OP_DEBUG
static int
sed1335fb_mmap(struct file *file, struct vm_area_struct *vma)
{
#ifdef FILE_OP_DEBUG
printk("%s(%d): %s()/n", __FILE__, __LINE__, __FUNCTION__);
#endif
vma->vm_start = fix.smem_start + vma->vm_offset;
return 0;
}
int sed1335fb_open(struct inode *inode, struct file *filp)
{
#ifdef FILE_OP_DEBUG
printk("%s(%d): %s()/n", __FILE__, __LINE__, __FUNCTION__);
#endif
return (0);
}
/*****************************************************************************/
int sed1335fb_release(struct inode *inode, struct file *filp)
{
#ifdef FILE_OP_DEBUG
printk("%s(%d): %s()/n", __FILE__, __LINE__, __FUNCTION__);
#endif
return (0);
}
/*****************************************************************************/
int
sed1335fb_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
unsigned long arg)
{
struct fb_var_screeninfo var;
int rc = 0;
int i;
#ifdef FILE_OP_DEBUG
printk("%s(%d): sed1335fb_ioctl()/n", __FILE__, __LINE__);
#endif
switch (cmd) {
case FBIOGET_VSCREENINFO:
i = verify_area(VERIFY_WRITE, (void *) arg,
sizeof(struct fb_var_screeninfo));
var.xres = LCD_XRES;/* visible resolution */
var.yres = LCD_YRES;
var.xres_virtual = LCD_XRES;/* virtual resolution */
var.yres_virtual = LCD_YRES;
var.xoffset = 0;/* offset from virtual to visible */
var.yoffset = 0;/* resolution */
var.bits_per_pixel = LCD_BPP;/* guess what */
var.grayscale = 1;/* != 0 Graylevels instead of colors */
//memcpy_tofs((void *) arg, &var, sizeof(var));
copy_to_user((void *) arg, &var, sizeof(var));
break;
case FBIOGET_FSCREENINFO:
i = verify_area(VERIFY_WRITE, (void *) arg,
sizeof(struct fb_fix_screeninfo));
if (i)
return i;
//memcpy_tofs((void *) arg, &fix, sizeof(fix));
copy_to_user((void *) arg, &fix, sizeof(fix));
return i;
default:
rc = -EINVAL;
break;
}
return (rc);
}
/*
*Exported file operations structure for driver...
*/
struct file_operations sed1335fb_fops = {
read:sed1335fb_read,
write:sed1335fb_write,
ioctl:sed1335fb_ioctl,
mmap:sed1335fb_mmap,
open:sed1335fb_open,
release:sed1335fb_release,
};
/* * Setup LCD module parameters */
int lcd_init(void)
{
int i = 0;
for(i=0;i<100000;i++);
write_cmd(SYSSET);
for (i = 0; i < 8; i++)
write_data(sysset[i]);
write_cmd(SCROLL);
for (i = 0; i < 10; i++)
write_data(scroll[i]);
write_cmd(HDOTSCR);
write_data(0x00);
write_cmd(OVLAY);
write_data(0x0C);
write_cmd(DISPON);
write_data(0x54);
write_cmd(CSRDIRR);
write_cmd(CSRW);
write_data(0x00);
write_data(0x00);
write_cmd(MWRITE);
for (i = 0; i < SED1335FB_BUFSIZE; i++)
write_data(0x00);
write_cmd(CSRW);
write_data(0x00);
write_data(0x00);
write_cmd(CSRFORM);
write_data(0x07);
write_data(0x07);
write_cmd(DISPON);
write_data(0x04);
return (0);
}
void sed1335fb_init(void)
{
int result;
init_io();
/* Set CS*/
setbit(LCD_CS,0);
/* Reset Sed1335 */
setbit(LCD_RST,0);
mdelay(5);
setbit(LCD_RST,1);
/* Do LCD init */
if (lcd_init()) {
printk(/*KERN_WARNING*/
"sed1335fb: can't init LCD controller, exiting/n");
return;
}
fix.smem_start = (unsigned long) sed1335fb_buff;
fix.smem_len = SED1335FB_BUFSIZE;/* Length of frame buffer mem */
fix.type = FB_TYPE_PACKED_PIXELS;/* see FB_TYPE_* */
fix.type_aux = 0;/* Interleave for interleaved Planes */
fix.visual = FB_VISUAL_MONO01;/* see FB_VISUAL_* */
fix.xpanstep = 0;/* zero if no hardware panning */
fix.ypanstep = 0;/* zero if no hardware panning */
fix.ywrapstep = 0;/* zero if no hardware ywrap */
fix.line_length = LCD_XRES / (8 * LCD_BPP);/* length of a line in bytes */
/* Register character device */
result = register_chrdev(SED1335FB_MAJOR, "fb", &sed1335fb_fops);
if (result < 0) {
printk(KERN_WARNING "sed1335fb: can't get major %d/n",
SED1335FB_MAJOR);
return;
}
//printk("sed1335fb: using PIO mode/n");
/* Set up PIO timer */
for (result=0;result < SED1335FB_BUFSIZE;result++)
tmp_buff[result] = 0; //sed1335fb_buff[result] + 1;
pio_timer.function = sed1335fb_pio_copy;
pio_timer.expires = jiffies + PIO_REFRESH_TIMER_TICKS;
add_timer(&pio_timer);
printk("******sed1335fb_init() finished8*****/n");
}
module_init(sed1335fb_init);
//MODULE_LICENSE("GPL");
/*****************************************************************************/
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