277 строки
6.8 KiB
C
277 строки
6.8 KiB
C
/* fortunet.c memory map
|
|
*
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/types.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/init.h>
|
|
#include <linux/string.h>
|
|
|
|
#include <linux/mtd/mtd.h>
|
|
#include <linux/mtd/map.h>
|
|
#include <linux/mtd/partitions.h>
|
|
|
|
#include <asm/io.h>
|
|
|
|
#define MAX_NUM_REGIONS 4
|
|
#define MAX_NUM_PARTITIONS 8
|
|
|
|
#define DEF_WINDOW_ADDR_PHY 0x00000000
|
|
#define DEF_WINDOW_SIZE 0x00800000 // 8 Mega Bytes
|
|
|
|
#define MTD_FORTUNET_PK "MTD FortuNet: "
|
|
|
|
#define MAX_NAME_SIZE 128
|
|
|
|
struct map_region
|
|
{
|
|
int window_addr_physical;
|
|
int altbankwidth;
|
|
struct map_info map_info;
|
|
struct mtd_info *mymtd;
|
|
struct mtd_partition parts[MAX_NUM_PARTITIONS];
|
|
char map_name[MAX_NAME_SIZE];
|
|
char parts_name[MAX_NUM_PARTITIONS][MAX_NAME_SIZE];
|
|
};
|
|
|
|
static struct map_region map_regions[MAX_NUM_REGIONS];
|
|
static int map_regions_set[MAX_NUM_REGIONS] = {0,0,0,0};
|
|
static int map_regions_parts[MAX_NUM_REGIONS] = {0,0,0,0};
|
|
|
|
|
|
|
|
struct map_info default_map = {
|
|
.size = DEF_WINDOW_SIZE,
|
|
.bankwidth = 4,
|
|
};
|
|
|
|
static char * __init get_string_option(char *dest,int dest_size,char *sor)
|
|
{
|
|
if(!dest_size)
|
|
return sor;
|
|
dest_size--;
|
|
while(*sor)
|
|
{
|
|
if(*sor==',')
|
|
{
|
|
sor++;
|
|
break;
|
|
}
|
|
else if(*sor=='\"')
|
|
{
|
|
sor++;
|
|
while(*sor)
|
|
{
|
|
if(*sor=='\"')
|
|
{
|
|
sor++;
|
|
break;
|
|
}
|
|
*dest = *sor;
|
|
dest++;
|
|
sor++;
|
|
dest_size--;
|
|
if(!dest_size)
|
|
{
|
|
*dest = 0;
|
|
return sor;
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
*dest = *sor;
|
|
dest++;
|
|
sor++;
|
|
dest_size--;
|
|
if(!dest_size)
|
|
{
|
|
*dest = 0;
|
|
return sor;
|
|
}
|
|
}
|
|
}
|
|
*dest = 0;
|
|
return sor;
|
|
}
|
|
|
|
static int __init MTD_New_Region(char *line)
|
|
{
|
|
char string[MAX_NAME_SIZE];
|
|
int params[6];
|
|
get_options (get_string_option(string,sizeof(string),line),6,params);
|
|
if(params[0]<1)
|
|
{
|
|
printk(MTD_FORTUNET_PK "Bad parameters for MTD Region "
|
|
" name,region-number[,base,size,bankwidth,altbankwidth]\n");
|
|
return 1;
|
|
}
|
|
if((params[1]<0)||(params[1]>=MAX_NUM_REGIONS))
|
|
{
|
|
printk(MTD_FORTUNET_PK "Bad region index of %d only have 0..%u regions\n",
|
|
params[1],MAX_NUM_REGIONS-1);
|
|
return 1;
|
|
}
|
|
memset(&map_regions[params[1]],0,sizeof(map_regions[params[1]]));
|
|
memcpy(&map_regions[params[1]].map_info,
|
|
&default_map,sizeof(map_regions[params[1]].map_info));
|
|
map_regions_set[params[1]] = 1;
|
|
map_regions[params[1]].window_addr_physical = DEF_WINDOW_ADDR_PHY;
|
|
map_regions[params[1]].altbankwidth = 2;
|
|
map_regions[params[1]].mymtd = NULL;
|
|
map_regions[params[1]].map_info.name = map_regions[params[1]].map_name;
|
|
strcpy(map_regions[params[1]].map_info.name,string);
|
|
if(params[0]>1)
|
|
{
|
|
map_regions[params[1]].window_addr_physical = params[2];
|
|
}
|
|
if(params[0]>2)
|
|
{
|
|
map_regions[params[1]].map_info.size = params[3];
|
|
}
|
|
if(params[0]>3)
|
|
{
|
|
map_regions[params[1]].map_info.bankwidth = params[4];
|
|
}
|
|
if(params[0]>4)
|
|
{
|
|
map_regions[params[1]].altbankwidth = params[5];
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
static int __init MTD_New_Partition(char *line)
|
|
{
|
|
char string[MAX_NAME_SIZE];
|
|
int params[4];
|
|
get_options (get_string_option(string,sizeof(string),line),4,params);
|
|
if(params[0]<3)
|
|
{
|
|
printk(MTD_FORTUNET_PK "Bad parameters for MTD Partition "
|
|
" name,region-number,size,offset\n");
|
|
return 1;
|
|
}
|
|
if((params[1]<0)||(params[1]>=MAX_NUM_REGIONS))
|
|
{
|
|
printk(MTD_FORTUNET_PK "Bad region index of %d only have 0..%u regions\n",
|
|
params[1],MAX_NUM_REGIONS-1);
|
|
return 1;
|
|
}
|
|
if(map_regions_parts[params[1]]>=MAX_NUM_PARTITIONS)
|
|
{
|
|
printk(MTD_FORTUNET_PK "Out of space for partition in this region\n");
|
|
return 1;
|
|
}
|
|
map_regions[params[1]].parts[map_regions_parts[params[1]]].name =
|
|
map_regions[params[1]]. parts_name[map_regions_parts[params[1]]];
|
|
strcpy(map_regions[params[1]].parts[map_regions_parts[params[1]]].name,string);
|
|
map_regions[params[1]].parts[map_regions_parts[params[1]]].size =
|
|
params[2];
|
|
map_regions[params[1]].parts[map_regions_parts[params[1]]].offset =
|
|
params[3];
|
|
map_regions[params[1]].parts[map_regions_parts[params[1]]].mask_flags = 0;
|
|
map_regions_parts[params[1]]++;
|
|
return 1;
|
|
}
|
|
|
|
__setup("MTD_Region=", MTD_New_Region);
|
|
__setup("MTD_Partition=", MTD_New_Partition);
|
|
|
|
/* Backwards-spelling-compatibility */
|
|
__setup("MTD_Partion=", MTD_New_Partition);
|
|
|
|
static int __init init_fortunet(void)
|
|
{
|
|
int ix,iy;
|
|
for(iy=ix=0;ix<MAX_NUM_REGIONS;ix++)
|
|
{
|
|
if(map_regions_parts[ix]&&(!map_regions_set[ix]))
|
|
{
|
|
printk(MTD_FORTUNET_PK "Region %d is not setup (Setting to default)\n",
|
|
ix);
|
|
memset(&map_regions[ix],0,sizeof(map_regions[ix]));
|
|
memcpy(&map_regions[ix].map_info,&default_map,
|
|
sizeof(map_regions[ix].map_info));
|
|
map_regions_set[ix] = 1;
|
|
map_regions[ix].window_addr_physical = DEF_WINDOW_ADDR_PHY;
|
|
map_regions[ix].altbankwidth = 2;
|
|
map_regions[ix].mymtd = NULL;
|
|
map_regions[ix].map_info.name = map_regions[ix].map_name;
|
|
strcpy(map_regions[ix].map_info.name,"FORTUNET");
|
|
}
|
|
if(map_regions_set[ix])
|
|
{
|
|
iy++;
|
|
printk(KERN_NOTICE MTD_FORTUNET_PK "%s flash device at physically "
|
|
" address %x size %x\n",
|
|
map_regions[ix].map_info.name,
|
|
map_regions[ix].window_addr_physical,
|
|
map_regions[ix].map_info.size);
|
|
|
|
map_regions[ix].map_info.phys = map_regions[ix].window_addr_physical,
|
|
|
|
map_regions[ix].map_info.virt =
|
|
ioremap_nocache(
|
|
map_regions[ix].window_addr_physical,
|
|
map_regions[ix].map_info.size);
|
|
if(!map_regions[ix].map_info.virt)
|
|
{
|
|
int j = 0;
|
|
printk(MTD_FORTUNET_PK "%s flash failed to ioremap!\n",
|
|
map_regions[ix].map_info.name);
|
|
for (j = 0 ; j < ix; j++)
|
|
iounmap(map_regions[j].map_info.virt);
|
|
return -ENXIO;
|
|
}
|
|
simple_map_init(&map_regions[ix].map_info);
|
|
|
|
printk(KERN_NOTICE MTD_FORTUNET_PK "%s flash is virtually at: %x\n",
|
|
map_regions[ix].map_info.name,
|
|
map_regions[ix].map_info.virt);
|
|
map_regions[ix].mymtd = do_map_probe("cfi_probe",
|
|
&map_regions[ix].map_info);
|
|
if((!map_regions[ix].mymtd)&&(
|
|
map_regions[ix].altbankwidth!=map_regions[ix].map_info.bankwidth))
|
|
{
|
|
printk(KERN_NOTICE MTD_FORTUNET_PK "Trying alternate bankwidth "
|
|
"for %s flash.\n",
|
|
map_regions[ix].map_info.name);
|
|
map_regions[ix].map_info.bankwidth =
|
|
map_regions[ix].altbankwidth;
|
|
map_regions[ix].mymtd = do_map_probe("cfi_probe",
|
|
&map_regions[ix].map_info);
|
|
}
|
|
map_regions[ix].mymtd->owner = THIS_MODULE;
|
|
add_mtd_partitions(map_regions[ix].mymtd,
|
|
map_regions[ix].parts,map_regions_parts[ix]);
|
|
}
|
|
}
|
|
if(iy)
|
|
return 0;
|
|
return -ENXIO;
|
|
}
|
|
|
|
static void __exit cleanup_fortunet(void)
|
|
{
|
|
int ix;
|
|
for(ix=0;ix<MAX_NUM_REGIONS;ix++)
|
|
{
|
|
if(map_regions_set[ix])
|
|
{
|
|
if( map_regions[ix].mymtd )
|
|
{
|
|
del_mtd_partitions( map_regions[ix].mymtd );
|
|
map_destroy( map_regions[ix].mymtd );
|
|
}
|
|
iounmap((void *)map_regions[ix].map_info.virt);
|
|
}
|
|
}
|
|
}
|
|
|
|
module_init(init_fortunet);
|
|
module_exit(cleanup_fortunet);
|
|
|
|
MODULE_AUTHOR("FortuNet, Inc.");
|
|
MODULE_DESCRIPTION("MTD map driver for FortuNet boards");
|