drivers/mtd/maps/fortunet.c

   1 /* fortunet.c memory map
   2  *
   3  */
   4
   5 #include <linux/module.h>
   6 #include <linux/types.h>
   7 #include <linux/kernel.h>
   8 #include <linux/init.h>
   9 #include <linux/string.h>
  10
  11 #include <linux/mtd/mtd.h>
  12 #include <linux/mtd/map.h>
  13 #include <linux/mtd/partitions.h>
  14
  15 #include <asm/io.h>
  16
  17 #define MAX_NUM_REGIONS         4
  18 #define MAX_NUM_PARTITIONS      8
  19
  20 #define DEF_WINDOW_ADDR_PHY     0x00000000
  21 #define DEF_WINDOW_SIZE         0x00800000              // 8 Mega Bytes
  22
  23 #define MTD_FORTUNET_PK         "MTD FortuNet: "
  24
  25 #define MAX_NAME_SIZE           128
  26
  27 struct map_region
  28 {
  29         int                     window_addr_physical;
  30         int                     altbankwidth;
  31         struct map_info         map_info;
  32         struct mtd_info         *mymtd;
  33         struct mtd_partition    parts[MAX_NUM_PARTITIONS];
  34         char                    map_name[MAX_NAME_SIZE];
  35         char                    parts_name[MAX_NUM_PARTITIONS][MAX_NAME_SIZE];
  36 };
  37
  38 static struct map_region        map_regions[MAX_NUM_REGIONS];
  39 static int                      map_regions_set[MAX_NUM_REGIONS] = {0,0,0,0};
  40 static int                      map_regions_parts[MAX_NUM_REGIONS] = {0,0,0,0};
  41
  42
  43
  44 struct map_info default_map = {
  45         .size = DEF_WINDOW_SIZE,
  46         .bankwidth = 4,
  47 };
  48
  49 static char * __init get_string_option(char *dest,int dest_size,char *sor)
  50 {
  51         if(!dest_size)
  52                 return sor;
  53         dest_size--;
  54         while(*sor)
  55         {
  56                 if(*sor==',')
  57                 {
  58                         sor++;
  59                         break;
  60                 }
  61                 else if(*sor=='\"')
  62                 {
  63                         sor++;
  64                         while(*sor)
  65                         {
  66                                 if(*sor=='\"')
  67                                 {
  68                                         sor++;
  69                                         break;
  70                                 }
  71                                 *dest = *sor;
  72                                 dest++;
  73                                 sor++;
  74                                 dest_size--;
  75                                 if(!dest_size)
  76                                 {
  77                                         *dest = 0;
  78                                         return sor;
  79                                 }
  80                         }
  81                 }
  82                 else
  83                 {
  84                         *dest = *sor;
  85                         dest++;
  86                         sor++;
  87                         dest_size--;
  88                         if(!dest_size)
  89                         {
  90                                 *dest = 0;
  91                                 return sor;
  92                         }
  93                 }
  94         }
  95         *dest = 0;
  96         return sor;
  97 }
  98
  99 static int __init MTD_New_Region(char *line)
 100 {
 101         char    string[MAX_NAME_SIZE];
 102         int     params[6];
 103         get_options (get_string_option(string,sizeof(string),line),6,params);
 104         if(params[0]<1)
 105         {
 106                 printk(MTD_FORTUNET_PK "Bad parameters for MTD Region "
 107                         " name,region-number[,base,size,bankwidth,altbankwidth]\n");
 108                 return 1;
 109         }
 110         if((params[1]<0)||(params[1]>=MAX_NUM_REGIONS))
 111         {
 112                 printk(MTD_FORTUNET_PK "Bad region index of %d only have 0..%u regions\n",
 113                         params[1],MAX_NUM_REGIONS-1);
 114                 return 1;
 115         }
 116         memset(&map_regions[params[1]],0,sizeof(map_regions[params[1]]));
 117         memcpy(&map_regions[params[1]].map_info,
 118                 &default_map,sizeof(map_regions[params[1]].map_info));
 119         map_regions_set[params[1]] = 1;
 120         map_regions[params[1]].window_addr_physical = DEF_WINDOW_ADDR_PHY;
 121         map_regions[params[1]].altbankwidth = 2;
 122         map_regions[params[1]].mymtd = NULL;
 123         map_regions[params[1]].map_info.name = map_regions[params[1]].map_name;
 124         strcpy(map_regions[params[1]].map_info.name,string);
 125         if(params[0]>1)
 126         {
 127                 map_regions[params[1]].window_addr_physical = params[2];
 128         }
 129         if(params[0]>2)
 130         {
 131                 map_regions[params[1]].map_info.size = params[3];
 132         }
 133         if(params[0]>3)
 134         {
 135                 map_regions[params[1]].map_info.bankwidth = params[4];
 136         }
 137         if(params[0]>4)
 138         {
 139                 map_regions[params[1]].altbankwidth = params[5];
 140         }
 141         return 1;
 142 }
 143
 144 static int __init MTD_New_Partition(char *line)
 145 {
 146         char    string[MAX_NAME_SIZE];
 147         int     params[4];
 148         get_options (get_string_option(string,sizeof(string),line),4,params);
 149         if(params[0]<3)
 150         {
 151                 printk(MTD_FORTUNET_PK "Bad parameters for MTD Partition "
 152                         " name,region-number,size,offset\n");
 153                 return 1;
 154         }
 155         if((params[1]<0)||(params[1]>=MAX_NUM_REGIONS))
 156         {
 157                 printk(MTD_FORTUNET_PK "Bad region index of %d only have 0..%u regions\n",
 158                         params[1],MAX_NUM_REGIONS-1);
 159                 return 1;
 160         }
 161         if(map_regions_parts[params[1]]>=MAX_NUM_PARTITIONS)
 162         {
 163                 printk(MTD_FORTUNET_PK "Out of space for partition in this region\n");
 164                 return 1;
 165         }
 166         map_regions[params[1]].parts[map_regions_parts[params[1]]].name =
 167                 map_regions[params[1]]. parts_name[map_regions_parts[params[1]]];
 168         strcpy(map_regions[params[1]].parts[map_regions_parts[params[1]]].name,string);
 169         map_regions[params[1]].parts[map_regions_parts[params[1]]].size =
 170                 params[2];
 171         map_regions[params[1]].parts[map_regions_parts[params[1]]].offset =
 172                 params[3];
 173         map_regions[params[1]].parts[map_regions_parts[params[1]]].mask_flags = 0;
 174         map_regions_parts[params[1]]++;
 175         return 1;
 176 }
 177
 178 __setup("MTD_Region=", MTD_New_Region);
 179 __setup("MTD_Partition=", MTD_New_Partition);
 180
 181 /* Backwards-spelling-compatibility */
 182 __setup("MTD_Partion=", MTD_New_Partition);
 183
 184 static int __init init_fortunet(void)
 185 {
 186         int     ix,iy;
 187         for(iy=ix=0;ix<MAX_NUM_REGIONS;ix++)
 188         {
 189                 if(map_regions_parts[ix]&&(!map_regions_set[ix]))
 190                 {
 191                         printk(MTD_FORTUNET_PK "Region %d is not setup (Setting to default)\n",
 192                                 ix);
 193                         memset(&map_regions[ix],0,sizeof(map_regions[ix]));
 194                         memcpy(&map_regions[ix].map_info,&default_map,
 195                                 sizeof(map_regions[ix].map_info));
 196                         map_regions_set[ix] = 1;
 197                         map_regions[ix].window_addr_physical = DEF_WINDOW_ADDR_PHY;
 198                         map_regions[ix].altbankwidth = 2;
 199                         map_regions[ix].mymtd = NULL;
 200                         map_regions[ix].map_info.name = map_regions[ix].map_name;
 201                         strcpy(map_regions[ix].map_info.name,"FORTUNET");
 202                 }
 203                 if(map_regions_set[ix])
 204                 {
 205                         iy++;
 206                         printk(KERN_NOTICE MTD_FORTUNET_PK "%s flash device at physically "
 207                                 " address %x size %x\n",
 208                                 map_regions[ix].map_info.name,
 209                                 map_regions[ix].window_addr_physical,
 210                                 map_regions[ix].map_info.size);
 211
 212                         map_regions[ix].map_info.phys = map_regions[ix].window_addr_physical,
 213
 214                         map_regions[ix].map_info.virt =
 215                                 ioremap_nocache(
 216                                 map_regions[ix].window_addr_physical,
 217                                 map_regions[ix].map_info.size);
 218                         if(!map_regions[ix].map_info.virt)
 219                         {
 220                                 int j = 0;
 221                                 printk(MTD_FORTUNET_PK "%s flash failed to ioremap!\n",
 222                                         map_regions[ix].map_info.name);
 223                                 for (j = 0 ; j < ix; j++)
 224                                         iounmap(map_regions[j].map_info.virt);
 225                                 return -ENXIO;
 226                         }
 227                         simple_map_init(&map_regions[ix].map_info);
 228
 229                         printk(KERN_NOTICE MTD_FORTUNET_PK "%s flash is virtually at: %x\n",
 230                                 map_regions[ix].map_info.name,
 231                                 map_regions[ix].map_info.virt);
 232                         map_regions[ix].mymtd = do_map_probe("cfi_probe",
 233                                 &map_regions[ix].map_info);
 234                         if((!map_regions[ix].mymtd)&&(
 235                                 map_regions[ix].altbankwidth!=map_regions[ix].map_info.bankwidth))
 236                         {
 237                                 printk(KERN_NOTICE MTD_FORTUNET_PK "Trying alternate bankwidth "
 238                                         "for %s flash.\n",
 239                                         map_regions[ix].map_info.name);
 240                                 map_regions[ix].map_info.bankwidth =
 241                                         map_regions[ix].altbankwidth;
 242                                 map_regions[ix].mymtd = do_map_probe("cfi_probe",
 243                                         &map_regions[ix].map_info);
 244                         }
 245                         map_regions[ix].mymtd->owner = THIS_MODULE;
 246                         add_mtd_partitions(map_regions[ix].mymtd,
 247                                 map_regions[ix].parts,map_regions_parts[ix]);
 248                 }
 249         }
 250         if(iy)
 251                 return 0;
 252         return -ENXIO;
 253 }
 254
 255 static void __exit cleanup_fortunet(void)
 256 {
 257         int     ix;
 258         for(ix=0;ix<MAX_NUM_REGIONS;ix++)
 259         {
 260                 if(map_regions_set[ix])
 261                 {
 262                         if( map_regions[ix].mymtd )
 263                         {
 264                                 del_mtd_partitions( map_regions[ix].mymtd );
 265                                 map_destroy( map_regions[ix].mymtd );
 266                         }
 267                         iounmap((void *)map_regions[ix].map_info.virt);
 268                 }
 269         }
 270 }
 271
 272 module_init(init_fortunet);
 273 module_exit(cleanup_fortunet);
 274
 275 MODULE_AUTHOR("FortuNet, Inc.");
 276 MODULE_DESCRIPTION("MTD map driver for FortuNet boards");