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; }