Help me compile linux kernel module

[Russian_Oligarch]

Hello.
Please, show me a correct Makefile for compiling a kernel module which consist of two *.c files.

My .c files:

module.c:
//*******************************************
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/interrupt.h>
//-----------------------------------------------------------
#define MODULE
#define __KERNEL__
//-----------------------------------------------------------
MODULE_AUTHOR("Oligarch");
MODULE_DESCRIPTION("Kernel module");
//-----------------------------------------------------------
static irqreturn_t ISI_interrupt(int irq, void * dev_id)
{
return IRQ_HANDLED;
}
//-----------------------------------------------------------
int init_module()
{
printk("Kernel: Module startup\n");
return 0;
}
//-----------------------------------------------------------
void cleanup_module()
{
printk("Kernel: Module quit\n");
return;
}
//-----------------------------------------------------------
//*******************************************

regs_map.c
//*******************************************
#include <stdint.h>
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/mman.h>
#include <fcntl.h>
//-------------------------------------------------
#define ISI_MAP_SIZE 4096Ul
#define ISI_MAP_MASK (ISI_MAP_SIZE - 1)
#define ISI_BASE 0xFFFC0000
//-------------------------------------------------
typedef volatile unsigned int AT91_REG;
//-------------------------------------------------
typedef struct _AT91S_ISI {
AT91_REG ISI_CR1;
AT91_REG ISI_CR2;
AT91_REG ISI_SR;
AT91_REG ISI_IER;
AT91_REG ISI_IDR;
AT91_REG ISI_IMR;
AT91_REG reserved1;
AT91_REG reserved2;
AT91_REG ISI_PSIZE;
AT91_REG ISI_PDECF;
AT91_REG ISI_PPFBD;
AT91_REG ISI_CDBA;
AT91_REG ISI_Y2R_SET0;
AT91_REG ISI_Y2R_SET1;
AT91_REG ISI_R2Y_SET0;
AT91_REG ISI_R2Y_SET1;
AT91_REG ISI_R2Y_SET2;
} AT91S_ISI, *AT91PS_ISI;
//-------------------------------------------------
AT91PS_ISI isi;
//-------------------------------------------------
AT91S_ISI * isi_map(unsigned int isibase)
{
int fd;
void * base;
AT91S_ISI * _isi;
off_t addr=isibase;
if ((fd=open("/dev/mem",O_RDWR|O_SYNC))==-1){fprintf(stderr,"Cannot open ISI /dev/mem.\n");exit(EXIT_FAILURE);}
base=mmap(0,ISI_MAP_SIZE,PROT_READ|PROT_WRITE,MAP_ SHARED,fd,addr&~ISI_MAP_MASK);
if(base==(void *)-1){fprintf(stderr, "Cannot ISI mmap.\n");exit(EXIT_FAILURE);}
_isi=base+(addr&ISI_MAP_MASK);
return _isi;
}
//-------------------------------------------------

//*******************************************


I started to write an ISI module for AT91SAM9260 and encountered with compilation problems. I compile module good without regs_map.c file, but I can't compile it with regs_map.c. Show me a correct Makefile to do it, please.
My old Makefile looks like:

obj-m := module.o
KDIR := /lib/modules/2.6.24/build
PWD := $(shell pwd)
CC := /home/sedyshev/arm-2007q1/bin/arm-none-linux-gnueabi-gcc
TOOLCHAIN=/home/sedyshev/arm-2007q1/bin/arm-none-linux-gnueabi-
default:
$(MAKE) CROSS_COMPILE=$(TOOLCHAIN) ARCH=arm -C $(KDIR) M=$(PWD) modules

Thank you.

[Russian_Oligarch]

how can I get access to hardware registers from kernel module?

[Russian_Oligarch]

I built kernel module before and it was working fine on my AT91SAM9260-EK. Now I want to write Image Sensor Interface driver for AT91SAM9260-EK, thus I need to get access to hardware registers. I know only phisical addresses of these registers. Can I just read and write to these adddresses or I should use another functionality ?