Durango Driver for SC1200 Geode

Hi

I am developing a simple driver for the Geode. i am at a loss of what is going wrong when I insmod the following module.

Any idess would be appreciated.

#define __KERNEL__ /* We're part of the kernel */ #define MODULE /* Not a permanent part, though */ #define _LOOSE_KERNEL_NAMES

/* #include */ #include "linux/kernel.h" #include "linux/module.h"

#include "fcntl.h" #include "signal.h" #include "stdio.h" #include "string.h" #include "sys/mman.h" #include "sys/stat.h" #include "sys/types.h" #include "unistd.h" #include "durango.c"

/* Following pointers are defined in durango.c */

extern unsigned char *gfx_virt_regptr; extern unsigned char *gfx_virt_fbptr; extern unsigned char *gfx_virt_vidptr; extern unsigned char *gfx_virt_vipptr; extern unsigned char *gfx_virt_spptr; extern unsigned char *gfx_virt_gpptr;

char message[100];

/*********************************************************************** Structures

/********************************************************************** Prototypes

void QueryCpu(void); int Initialise(void);

int init_module(void) { int returnval;

/* Remap SC1200 registers into kernel memory*/ Initialise();

/* Identify CPU */ /* QueryCpu(); */

/* Set Display Mode */

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

• THE FOLLOWING LINE CAUSES THE SYSTEM TO LOCK UP */ returnval = gfx_set_display_mode(640,480,16,60); gfx_pattern_fill(10,10,100,100);

sprintf(message,"gfx_set_display_mode returned: [%X] \n",returnval); printk(message); return 0;

void cleanup_module(void) { printk("Goodbye\n"); }

void QueryCpu(void) { char szCPU[][10] = {"Unknown","GXLV","SC1200"};

unsigned char major, minor, cpu; unsigned long cpuid;

printk("Probing CPU :"); cpuid = gfx_detect_cpu();

cpu = (unsigned char) cpuid & 0xFF; major = (unsigned char) ((cpuid & 0xFF00L) >> 8); minor = (unsigned char) ((cpuid & 0xFF0000L) >> 16);

sprintf(message,"Probing CPU returned : %s, Rev Maj: %d, Min: %d\n",szCPU[cpu], major, minor); printk(message); }

int Initialise(void) { unsigned long *pStart; unsigned long pAlloc;

int mem_fd;

// Physical Address of SC1200 base registers pStart = (unsigned long *)0x40000000;

pAlloc = __ioremap(0x40000000,10000000); gfx_virt_regptr = (char *)(__ioremap(0x40000000,0x10000)); //64K gfx_virt_fbptr = (char *)(__ioremap(0x40800000,0x400000)); //4M gfx_virt_vidptr = (char *)(__ioremap(0x40010000,0x1000)); //4K gfx_virt_vipptr = (char *)(__ioremap(0x40015000,0x10000)); //4K gfx_virt_spptr = gfx_virt_regptr; gfx_virt_gpptr = gfx_virt_regptr;

/* gfx_virt_regptr = (char*)pAlloc; gfx_virt_fbptr = (char*)(pAlloc + 0x800000L); gfx_virt_vidptr = (char*)(pAlloc + 0x10000L); gfx_virt_vipptr = (char*)(pAlloc + 0x15000L); gfx_virt_spptr = (char*)pAlloc; gfx_virt_gpptr = (char*)pAlloc;

sprintf(message,"gfx_virt_regptr :[%X]\n",gfx_virt_regptr); printk(message); sprintf(message,"gfx_virt_fbptr :[%X]\n",gfx_virt_fbptr); printk(message); sprintf(message,"gfx_virt_vidptr :[%X]\n",gfx_virt_vidptr); printk(message); sprintf(message,"gfx_virt_vipptr :[%X]\n",gfx_virt_vipptr); printk(message); sprintf(message,"gfx_virt_spptr :[%X]\n",gfx_virt_spptr); printk(message); sprintf(message,"gfx_virt_gpptr :[%X]\n",gfx_virt_gpptr); printk(message);

return 0; }