Ronbin
May 31st, 2005, 06:10 AM
hi
I'm trying to replace my keyboard interrupt handler using this (http://www.faqs.org/docs/kernel/x1206.html) tuto. I've changed the code a bit, and now it looks like this:
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/sched.h>
#include <linux/tqueue.h>
#include <linux/interrupt.h>
#include <asm/io.h>
/* Bottom Half */
static void got_char(void *scancode)
{
printk(KERN_ALERT"Scan Code %x %s.\n",
(int) *((char *) scancode) & 0x7F,
*((char *) scancode) & 0x80 ? "Released" : "Pressed");
}
/* This function services keyboard interrupts. It reads the relevant
* information from the keyboard and then scheduales the bottom half
* to run when the kernel considers it safe.
*/
void irq_handler(int irq, void *dev_id, struct pt_regs *regs)
{
/* This variables are static because they need to be
* accessible (through pointers) to the bottom half routine.
*/
static unsigned char scancode;
unsigned char status;
DECLARE_TASKLET(task, got_char, &scancode);
/* Read keyboard status */
status = inb(0x64);
scancode = inb(0x60);
/* Scheduale bottom half to run */
tasklet_schedule(&task);}
/* Initialize the module - register the IRQ handler */
int init_module()
{
free_irq(1, NULL);
printk(KERN_ALERT"free\n");
int result = request_irq(1,irq_handler,SA_INTERRUPT,"test_keyboard_irq_handler",NULL);
if ( result != 0 )
{
printk ( KERN_ALERT"error, result=%d\n",result );
return -1;
}
else
{
printk ( KERN_ALERT"succes!\n" );
return 0;
}
}
/* Cleanup */
void cleanup_module()
{
free_irq(1, NULL);
}
after compiling the module, I try to load it with insmod, but it shows this
trying to free free IRQ1
free
error, result=-16
insmod: error inserting 'intrpt.ko': -1 Operation not permitted
aby idea????
I'm trying to replace my keyboard interrupt handler using this (http://www.faqs.org/docs/kernel/x1206.html) tuto. I've changed the code a bit, and now it looks like this:
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/sched.h>
#include <linux/tqueue.h>
#include <linux/interrupt.h>
#include <asm/io.h>
/* Bottom Half */
static void got_char(void *scancode)
{
printk(KERN_ALERT"Scan Code %x %s.\n",
(int) *((char *) scancode) & 0x7F,
*((char *) scancode) & 0x80 ? "Released" : "Pressed");
}
/* This function services keyboard interrupts. It reads the relevant
* information from the keyboard and then scheduales the bottom half
* to run when the kernel considers it safe.
*/
void irq_handler(int irq, void *dev_id, struct pt_regs *regs)
{
/* This variables are static because they need to be
* accessible (through pointers) to the bottom half routine.
*/
static unsigned char scancode;
unsigned char status;
DECLARE_TASKLET(task, got_char, &scancode);
/* Read keyboard status */
status = inb(0x64);
scancode = inb(0x60);
/* Scheduale bottom half to run */
tasklet_schedule(&task);}
/* Initialize the module - register the IRQ handler */
int init_module()
{
free_irq(1, NULL);
printk(KERN_ALERT"free\n");
int result = request_irq(1,irq_handler,SA_INTERRUPT,"test_keyboard_irq_handler",NULL);
if ( result != 0 )
{
printk ( KERN_ALERT"error, result=%d\n",result );
return -1;
}
else
{
printk ( KERN_ALERT"succes!\n" );
return 0;
}
}
/* Cleanup */
void cleanup_module()
{
free_irq(1, NULL);
}
after compiling the module, I try to load it with insmod, but it shows this
trying to free free IRQ1
free
error, result=-16
insmod: error inserting 'intrpt.ko': -1 Operation not permitted
aby idea????