drivers/mtd/maps/fortunet.c

   1 /* fortunet.c memory map
   2  *
   3  * $Id: fortunet.c,v 1.6 2003/05/21 12:45:18 dwmw2 Exp $
   4  */
   5
   6 #include <linux/module.h>
   7 #include <linux/types.h>
   8 #include <linux/kernel.h>
   9 #include <linux/init.h>
  10 #include <asm/io.h>
  11 #include <linux/mtd/mtd.h>
  12 #include <linux/mtd/map.h>
  13 #include <linux/mtd/partitions.h>
  14
  15 #define MAX_NUM_REGIONS         4
  16 #define MAX_NUM_PARTITIONS      8
  17
  18 #define DEF_WINDOW_ADDR_PHY     0x00000000
  19 #define DEF_WINDOW_SIZE         0x00800000              // 8 Mega Bytes
  20
  21 #define MTD_FORTUNET_PK         "MTD FortuNet: "
  22
  23 #define MAX_NAME_SIZE           128
  24
  25 struct map_region
  26 {
  27         int                     window_addr_physical;
  28         int                     altbuswidth;
  29         struct map_info         map_info;
  30         struct mtd_info         *mymtd;
  31         struct mtd_partition    parts[MAX_NUM_PARTITIONS];
  32         char                    map_name[MAX_NAME_SIZE];
  33         char                    parts_name[MAX_NUM_PARTITIONS][MAX_NAME_SIZE];
  34 };
  35
  36 static struct map_region        map_regions[MAX_NUM_REGIONS];
  37 static int                      map_regions_set[MAX_NUM_REGIONS] = {0,0,0,0};
  38 static int                      map_regions_parts[MAX_NUM_REGIONS] = {0,0,0,0};
  39
  40
  41
  42 struct map_info default_map = {
  43         .size = DEF_WINDOW_SIZE,
  44         .buswidth = 4,
  45 };
  46
  47 static char * __init get_string_option(char *dest,int dest_size,char *sor)
  48 {
  49         if(!dest_size)
  50                 return sor;
  51         dest_size--;
  52         while(*sor)
  53         {
  54                 if(*sor==',')
  55                 {
  56                         sor++;
  57                         break;
  58                 }
  59                 else if(*sor=='\"')
  60                 {
  61                         sor++;
  62                         while(*sor)
  63                         {
  64                                 if(*sor=='\"')
  65                                 {
  66                                         sor++;
  67                                         break;
  68                                 }
  69                                 *dest = *sor;
  70                                 dest++;
  71                                 sor++;
  72                                 dest_size--;
  73                                 if(!dest_size)
  74                                 {
  75                                         *dest = 0;
  76                                         return sor;
  77                                 }
  78                         }
  79                 }
  80                 else
  81                 {
  82                         *dest = *sor;
  83                         dest++;
  84                         sor++;
  85                         dest_size--;
  86                         if(!dest_size)
  87                         {
  88                                 *dest = 0;
  89                                 return sor;
  90                         }
  91                 }
  92         }
  93         *dest = 0;
  94         return sor;
  95 }
  96
  97 static int __init MTD_New_Region(char *line)
  98 {
  99         char    string[MAX_NAME_SIZE];
 100         int     params[6];
 101         get_options (get_string_option(string,sizeof(string),line),6,params);
 102         if(params[0]<1)
 103         {
 104                 printk(MTD_FORTUNET_PK "Bad parameters for MTD Region "
 105                         " name,region-number[,base,size,buswidth,altbuswidth]\n");
 106                 return 1;
 107         }
 108         if((params[1]<0)||(params[1]>=MAX_NUM_REGIONS))
 109         {
 110                 printk(MTD_FORTUNET_PK "Bad region index of %d only have 0..%u regions\n",
 111                         params[1],MAX_NUM_REGIONS-1);
 112                 return 1;
 113         }
 114         memset(&map_regions[params[1]],0,sizeof(map_regions[params[1]]));
 115         memcpy(&map_regions[params[1]].map_info,
 116                 &default_map,sizeof(map_regions[params[1]].map_info));
 117         map_regions_set[params[1]] = 1;
 118         map_regions[params[1]].window_addr_physical = DEF_WINDOW_ADDR_PHY;
 119         map_regions[params[1]].altbuswidth = 2;
 120         map_regions[params[1]].mymtd = NULL;
 121         map_regions[params[1]].map_info.name = map_regions[params[1]].map_name;
 122         strcpy(map_regions[params[1]].map_info.name,string);
 123         if(params[0]>1)
 124         {
 125                 map_regions[params[1]].window_addr_physical = params[2];
 126         }
 127         if(params[0]>2)
 128         {
 129                 map_regions[params[1]].map_info.size = params[3];
 130         }
 131         if(params[0]>3)
 132         {
 133                 map_regions[params[1]].map_info.buswidth = params[4];
 134         }
 135         if(params[0]>4)
 136         {
 137                 map_regions[params[1]].altbuswidth = params[5];
 138         }
 139         return 1;
 140 }
 141
 142 static int __init MTD_New_Partition(char *line)
 143 {
 144         char    string[MAX_NAME_SIZE];
 145         int     params[4];
 146         get_options (get_string_option(string,sizeof(string),line),4,params);
 147         if(params[0]<3)
 148         {
 149                 printk(MTD_FORTUNET_PK "Bad parameters for MTD Partition "
 150                         " name,region-number,size,offset\n");
 151                 return 1;
 152         }
 153         if((params[1]<0)||(params[1]>=MAX_NUM_REGIONS))
 154         {
 155                 printk(MTD_FORTUNET_PK "Bad region index of %d only have 0..%u regions\n",
 156                         params[1],MAX_NUM_REGIONS-1);
 157                 return 1;
 158         }
 159         if(map_regions_parts[params[1]]>=MAX_NUM_PARTITIONS)
 160         {
 161                 printk(MTD_FORTUNET_PK "Out of space for partition in this region\n");
 162                 return 1;
 163         }
 164         map_regions[params[1]].parts[map_regions_parts[params[1]]].name =
 165                 map_regions[params[1]]. parts_name[map_regions_parts[params[1]]];
 166         strcpy(map_regions[params[1]].parts[map_regions_parts[params[1]]].name,string);
 167         map_regions[params[1]].parts[map_regions_parts[params[1]]].size =
 168                 params[2];
 169         map_regions[params[1]].parts[map_regions_parts[params[1]]].offset =
 170                 params[3];
 171         map_regions[params[1]].parts[map_regions_parts[params[1]]].mask_flags = 0;
 172         map_regions_parts[params[1]]++;
 173         return 1;
 174 }
 175
 176 __setup("MTD_Region=", MTD_New_Region);
 177 __setup("MTD_Partition=", MTD_New_Partition);
 178
 179 /* Backwards-spelling-compatibility */
 180 __setup("MTD_Partion=", MTD_New_Partition);
 181
 182 int __init init_fortunet(void)
 183 {
 184         int     ix,iy;
 185         for(iy=ix=0;ix<MAX_NUM_REGIONS;ix++)
 186         {
 187                 if(map_regions_parts[ix]&&(!map_regions_set[ix]))
 188                 {
 189                         printk(MTD_FORTUNET_PK "Region %d is not setup (Setting to default)\n",
 190                                 ix);
 191                         memset(&map_regions[ix],0,sizeof(map_regions[ix]));
 192                         memcpy(&map_regions[ix].map_info,&default_map,
 193                                 sizeof(map_regions[ix].map_info));
 194                         map_regions_set[ix] = 1;
 195                         map_regions[ix].window_addr_physical = DEF_WINDOW_ADDR_PHY;
 196                         map_regions[ix].altbuswidth = 2;
 197                         map_regions[ix].mymtd = NULL;
 198                         map_regions[ix].map_info.name = map_regions[ix].map_name;
 199                         strcpy(map_regions[ix].map_info.name,"FORTUNET");
 200                 }
 201                 if(map_regions_set[ix])
 202                 {
 203                         iy++;
 204                         printk(KERN_NOTICE MTD_FORTUNET_PK "%s flash device at physically "
 205                                 " address %x size %x\n",
 206                                 map_regions[ix].map_info.name,
 207                                 map_regions[ix].window_addr_physical,
 208                                 map_regions[ix].map_info.size);
 209
 210                         map_regions[ix].map_info.phys = map_regions[ix].window_addr_physical,
 211
 212                         map_regions[ix].map_info.virt =
 213                                 (int)ioremap_nocache(
 214                                 map_regions[ix].window_addr_physical,
 215                                 map_regions[ix].map_info.size);
 216                         if(!map_regions[ix].map_info.virt)
 217                         {
 218                                 printk(MTD_FORTUNET_PK "%s flash failed to ioremap!\n",
 219                                         map_regions[ix].map_info.name);
 220                                 return -ENXIO;
 221                         }
 222                         simple_map_init(&map_regions[ix].map_info);
 223
 224                         printk(KERN_NOTICE MTD_FORTUNET_PK "%s flash is virtually at: %x\n",
 225                                 map_regions[ix].map_info.name,
 226                                 map_regions[ix].map_info.virt);
 227                         map_regions[ix].mymtd = do_map_probe("cfi_probe",
 228                                 &map_regions[ix].map_info);
 229                         if((!map_regions[ix].mymtd)&&(
 230                                 map_regions[ix].altbuswidth!=map_regions[ix].map_info.buswidth))
 231                         {
 232                                 printk(KERN_NOTICE MTD_FORTUNET_PK "Trying alternate buswidth "
 233                                         "for %s flash.\n",
 234                                         map_regions[ix].map_info.name);
 235                                 map_regions[ix].map_info.buswidth =
 236                                         map_regions[ix].altbuswidth;
 237                                 map_regions[ix].mymtd = do_map_probe("cfi_probe",
 238                                         &map_regions[ix].map_info);
 239                         }
 240                         map_regions[ix].mymtd->owner = THIS_MODULE;
 241                         add_mtd_partitions(map_regions[ix].mymtd,
 242                                 map_regions[ix].parts,map_regions_parts[ix]);
 243                 }
 244         }
 245         if(iy)
 246                 return 0;
 247         return -ENXIO;
 248 }
 249
 250 static void __exit cleanup_fortunet(void)
 251 {
 252         int     ix;
 253         for(ix=0;ix<MAX_NUM_REGIONS;ix++)
 254         {
 255                 if(map_regions_set[ix])
 256                 {
 257                         if( map_regions[ix].mymtd )
 258                         {
 259                                 del_mtd_partitions( map_regions[ix].mymtd );
 260                                 map_destroy( map_regions[ix].mymtd );
 261                         }
 262                         iounmap((void *)map_regions[ix].map_info.virt);
 263                 }
 264         }
 265 }
 266
 267 module_init(init_fortunet);
 268 module_exit(cleanup_fortunet);
 269
 270 MODULE_AUTHOR("FortuNet, Inc.");
 271 MODULE_DESCRIPTION("MTD map driver for FortuNet boards");