git.oblomov.eu Git - linux-2.6/blob - arch/mips/lasat/lasat_board.c

   1 /*
   2  * Thomas Horsten <thh@lasat.com>
   3  * Copyright (C) 2000 LASAT Networks A/S.
   4  *
   5  *  This program is free software; you can distribute it and/or modify it
   6  *  under the terms of the GNU General Public License (Version 2) as
   7  *  published by the Free Software Foundation.
   8  *
   9  *  This program is distributed in the hope it will be useful, but WITHOUT
  10  *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  *  for more details.
  13  *
  14  *  You should have received a copy of the GNU General Public License along
  15  *  with this program; if not, write to the Free Software Foundation, Inc.,
  16  *  59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
  17  *
  18  * Routines specific to the LASAT boards
  19  */
  20 #include <linux/types.h>
  21 #include <linux/crc32.h>
  22 #include <asm/lasat/lasat.h>
  23 #include <linux/kernel.h>
  24 #include <linux/string.h>
  25 #include <linux/ctype.h>
  26 #include <asm/bootinfo.h>
  27 #include <asm/addrspace.h>
  28 #include "at93c.h"
  29 /* New model description table */
  30 #include "lasat_models.h"
  31
  32 #define EEPROM_CRC(data, len) (~0 ^ crc32(~0, data, len))
  33
  34 struct lasat_info lasat_board_info;
  35
  36 void update_bcastaddr(void);
  37
  38 int EEPROMRead(unsigned int pos, unsigned char *data, int len)
  39 {
  40         int i;
  41
  42         for (i=0; i<len; i++)
  43                 *data++ = at93c_read(pos++);
  44
  45         return 0;
  46 }
  47 int EEPROMWrite(unsigned int pos, unsigned char *data, int len)
  48 {
  49         int i;
  50
  51         for (i=0; i<len; i++)
  52                 at93c_write(pos++, *data++);
  53
  54         return 0;
  55 }
  56
  57 static void init_flash_sizes(void)
  58 {
  59         int i;
  60         unsigned long *lb = lasat_board_info.li_flashpart_base;
  61         unsigned long *ls = lasat_board_info.li_flashpart_size;
  62
  63         ls[LASAT_MTD_BOOTLOADER] = 0x40000;
  64         ls[LASAT_MTD_SERVICE] = 0xC0000;
  65         ls[LASAT_MTD_NORMAL] = 0x100000;
  66
  67         if (mips_machtype == MACH_LASAT_100) {
  68                 lasat_board_info.li_flash_base = 0x1e000000;
  69
  70                 lb[LASAT_MTD_BOOTLOADER] = 0x1e400000;
  71
  72                 if (lasat_board_info.li_flash_size > 0x200000) {
  73                         ls[LASAT_MTD_CONFIG] = 0x100000;
  74                         ls[LASAT_MTD_FS] = 0x500000;
  75                 }
  76         } else {
  77                 lasat_board_info.li_flash_base = 0x10000000;
  78
  79                 if (lasat_board_info.li_flash_size < 0x1000000) {
  80                         lb[LASAT_MTD_BOOTLOADER] = 0x10000000;
  81                         ls[LASAT_MTD_CONFIG] = 0x100000;
  82                         if (lasat_board_info.li_flash_size >= 0x400000) {
  83                                 ls[LASAT_MTD_FS] = lasat_board_info.li_flash_size - 0x300000;
  84                         }
  85                 }
  86         }
  87
  88         for (i = 1; i < LASAT_MTD_LAST; i++)
  89                 lb[i] = lb[i-1] + ls[i-1];
  90 }
  91
  92 int lasat_init_board_info(void)
  93 {
  94         int c;
  95         unsigned long crc;
  96         unsigned long cfg0, cfg1;
  97         const product_info_t   *ppi;
  98         int i_n_base_models = N_BASE_MODELS;
  99         const char * const * i_txt_base_models = txt_base_models;
 100         int i_n_prids = N_PRIDS;
 101
 102         memset(&lasat_board_info, 0, sizeof(lasat_board_info));
 103
 104         /* First read the EEPROM info */
 105         EEPROMRead(0, (unsigned char *)&lasat_board_info.li_eeprom_info,
 106                    sizeof(struct lasat_eeprom_struct));
 107
 108         /* Check the CRC */
 109         crc = EEPROM_CRC((unsigned char *)(&lasat_board_info.li_eeprom_info),
 110                     sizeof(struct lasat_eeprom_struct) - 4);
 111
 112         if (crc != lasat_board_info.li_eeprom_info.crc32) {
 113                 prom_printf("WARNING...\nWARNING...\nEEPROM CRC does not match calculated, attempting to soldier on...\n");
 114         }
 115
 116         if (lasat_board_info.li_eeprom_info.version != LASAT_EEPROM_VERSION)
 117         {
 118                 prom_printf("WARNING...\nWARNING...\nEEPROM version %d, wanted version %d, attempting to soldier on...\n",
 119                        (unsigned int)lasat_board_info.li_eeprom_info.version,
 120                        LASAT_EEPROM_VERSION);
 121         }
 122
 123         cfg0 = lasat_board_info.li_eeprom_info.cfg[0];
 124         cfg1 = lasat_board_info.li_eeprom_info.cfg[1];
 125
 126         if ( LASAT_W0_DSCTYPE(cfg0) != 1) {
 127                 prom_printf("WARNING...\nWARNING...\nInvalid configuration read from EEPROM, attempting to soldier on...");
 128         }
 129         /* We have a valid configuration */
 130
 131         switch (LASAT_W0_SDRAMBANKSZ(cfg0)) {
 132         case 0:
 133                 lasat_board_info.li_memsize = 0x0800000;
 134                 break;
 135         case 1:
 136                 lasat_board_info.li_memsize = 0x1000000;
 137                 break;
 138         case 2:
 139                 lasat_board_info.li_memsize = 0x2000000;
 140                 break;
 141         case 3:
 142                 lasat_board_info.li_memsize = 0x4000000;
 143                 break;
 144         case 4:
 145                 lasat_board_info.li_memsize = 0x8000000;
 146                 break;
 147         default:
 148                 lasat_board_info.li_memsize = 0;
 149         }
 150
 151         switch (LASAT_W0_SDRAMBANKS(cfg0)) {
 152         case 0:
 153                 break;
 154         case 1:
 155                 lasat_board_info.li_memsize *= 2;
 156                 break;
 157         default:
 158                 break;
 159         }
 160
 161         switch (LASAT_W0_BUSSPEED(cfg0)) {
 162         case 0x0:
 163                 lasat_board_info.li_bus_hz = 60000000;
 164                 break;
 165         case 0x1:
 166                 lasat_board_info.li_bus_hz = 66000000;
 167                 break;
 168         case 0x2:
 169                 lasat_board_info.li_bus_hz = 66666667;
 170                 break;
 171         case 0x3:
 172                 lasat_board_info.li_bus_hz = 80000000;
 173                 break;
 174         case 0x4:
 175                 lasat_board_info.li_bus_hz = 83333333;
 176                 break;
 177         case 0x5:
 178                 lasat_board_info.li_bus_hz = 100000000;
 179                 break;
 180         }
 181
 182         switch (LASAT_W0_CPUCLK(cfg0)) {
 183         case 0x0:
 184                 lasat_board_info.li_cpu_hz =
 185                         lasat_board_info.li_bus_hz;
 186                 break;
 187         case 0x1:
 188                 lasat_board_info.li_cpu_hz =
 189                         lasat_board_info.li_bus_hz +
 190                         (lasat_board_info.li_bus_hz >> 1);
 191                 break;
 192         case 0x2:
 193                 lasat_board_info.li_cpu_hz =
 194                         lasat_board_info.li_bus_hz +
 195                         lasat_board_info.li_bus_hz;
 196                 break;
 197         case 0x3:
 198                 lasat_board_info.li_cpu_hz =
 199                         lasat_board_info.li_bus_hz +
 200                         lasat_board_info.li_bus_hz +
 201                         (lasat_board_info.li_bus_hz >> 1);
 202                 break;
 203         case 0x4:
 204                 lasat_board_info.li_cpu_hz =
 205                         lasat_board_info.li_bus_hz +
 206                         lasat_board_info.li_bus_hz +
 207                         lasat_board_info.li_bus_hz;
 208                 break;
 209         }
 210
 211         /* Flash size */
 212         switch (LASAT_W1_FLASHSIZE(cfg1)) {
 213         case 0:
 214                 lasat_board_info.li_flash_size = 0x200000;
 215                 break;
 216         case 1:
 217                 lasat_board_info.li_flash_size = 0x400000;
 218                 break;
 219         case 2:
 220                 lasat_board_info.li_flash_size = 0x800000;
 221                 break;
 222         case 3:
 223                 lasat_board_info.li_flash_size = 0x1000000;
 224                 break;
 225         case 4:
 226                 lasat_board_info.li_flash_size = 0x2000000;
 227                 break;
 228         }
 229
 230         init_flash_sizes();
 231
 232         lasat_board_info.li_bmid = LASAT_W0_BMID(cfg0);
 233         lasat_board_info.li_prid = lasat_board_info.li_eeprom_info.prid;
 234         if (lasat_board_info.li_prid == 0xffff || lasat_board_info.li_prid == 0)
 235                 lasat_board_info.li_prid = lasat_board_info.li_bmid;
 236
 237         /* Base model stuff */
 238         if (lasat_board_info.li_bmid > i_n_base_models)
 239                 lasat_board_info.li_bmid = i_n_base_models;
 240         strcpy(lasat_board_info.li_bmstr, i_txt_base_models[lasat_board_info.li_bmid]);
 241
 242         /* Product ID dependent values */
 243         c = lasat_board_info.li_prid;
 244         if (c >= i_n_prids) {
 245                 strcpy(lasat_board_info.li_namestr, "Unknown Model");
 246                 strcpy(lasat_board_info.li_typestr, "Unknown Type");
 247         } else {
 248                 ppi = &vendor_info_table[0].vi_product_info[c];
 249                 strcpy(lasat_board_info.li_namestr, ppi->pi_name);
 250                 if (ppi->pi_type)
 251                         strcpy(lasat_board_info.li_typestr, ppi->pi_type);
 252                 else
 253                         sprintf(lasat_board_info.li_typestr, "%d",10*c);
 254         }
 255
 256 #if defined(CONFIG_INET) && defined(CONFIG_SYSCTL)
 257         update_bcastaddr();
 258 #endif
 259
 260         return 0;
 261 }
 262
 263 void lasat_write_eeprom_info(void)
 264 {
 265         unsigned long crc;
 266
 267         /* Generate the CRC */
 268         crc = EEPROM_CRC((unsigned char *)(&lasat_board_info.li_eeprom_info),
 269                     sizeof(struct lasat_eeprom_struct) - 4);
 270         lasat_board_info.li_eeprom_info.crc32 = crc;
 271
 272         /* Write the EEPROM info */
 273         EEPROMWrite(0, (unsigned char *)&lasat_board_info.li_eeprom_info,
 274                     sizeof(struct lasat_eeprom_struct));
 275 }
 276