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