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 <linux/mutex.h>
  27 #include <asm/bootinfo.h>
  28 #include <asm/addrspace.h>
  29 #include "at93c.h"
  30 /* New model description table */
  31 #include "lasat_models.h"
  32
  33 static DEFINE_MUTEX(lasat_eeprom_mutex);
  34
  35 #define EEPROM_CRC(data, len) (~crc32(~0, data, len))
  36
  37 struct lasat_info lasat_board_info;
  38
  39 int EEPROMRead(unsigned int pos, unsigned char *data, int len)
  40 {
  41         int i;
  42
  43         for (i = 0; i < len; i++)
  44                 *data++ = at93c_read(pos++);
  45
  46         return 0;
  47 }
  48
  49 int EEPROMWrite(unsigned int pos, unsigned char *data, int len)
  50 {
  51         int i;
  52
  53         for (i = 0; i < len; i++)
  54                 at93c_write(pos++, *data++);
  55
  56         return 0;
  57 }
  58
  59 static void init_flash_sizes(void)
  60 {
  61         unsigned long *lb = lasat_board_info.li_flashpart_base;
  62         unsigned long *ls = lasat_board_info.li_flashpart_size;
  63         int i;
  64
  65         ls[LASAT_MTD_BOOTLOADER] = 0x40000;
  66         ls[LASAT_MTD_SERVICE] = 0xC0000;
  67         ls[LASAT_MTD_NORMAL] = 0x100000;
  68
  69         if (mips_machtype == MACH_LASAT_100) {
  70                 lasat_board_info.li_flash_base = 0x1e000000;
  71
  72                 lb[LASAT_MTD_BOOTLOADER] = 0x1e400000;
  73
  74                 if (lasat_board_info.li_flash_size > 0x200000) {
  75                         ls[LASAT_MTD_CONFIG] = 0x100000;
  76                         ls[LASAT_MTD_FS] = 0x500000;
  77                 }
  78         } else {
  79                 lasat_board_info.li_flash_base = 0x10000000;
  80
  81                 if (lasat_board_info.li_flash_size < 0x1000000) {
  82                         lb[LASAT_MTD_BOOTLOADER] = 0x10000000;
  83                         ls[LASAT_MTD_CONFIG] = 0x100000;
  84                         if (lasat_board_info.li_flash_size >= 0x400000)
  85                                 ls[LASAT_MTD_FS] =
  86                                      lasat_board_info.li_flash_size - 0x300000;
  87                 }
  88         }
  89
  90         for (i = 1; i < LASAT_MTD_LAST; i++)
  91                 lb[i] = lb[i-1] + ls[i-1];
  92 }
  93
  94 int lasat_init_board_info(void)
  95 {
  96         int c;
  97         unsigned long crc;
  98         unsigned long cfg0, cfg1;
  99         const struct product_info   *ppi;
 100         int i_n_base_models = N_BASE_MODELS;
 101         const char * const * i_txt_base_models = txt_base_models;
 102         int i_n_prids = N_PRIDS;
 103
 104         memset(&lasat_board_info, 0, sizeof(lasat_board_info));
 105
 106         /* First read the EEPROM info */
 107         EEPROMRead(0, (unsigned char *)&lasat_board_info.li_eeprom_info,
 108                    sizeof(struct lasat_eeprom_struct));
 109
 110         /* Check the CRC */
 111         crc = EEPROM_CRC((unsigned char *)(&lasat_board_info.li_eeprom_info),
 112                     sizeof(struct lasat_eeprom_struct) - 4);
 113
 114         if (crc != lasat_board_info.li_eeprom_info.crc32) {
 115                 printk(KERN_WARNING "WARNING...\nWARNING...\nEEPROM CRC does "
 116                        "not match calculated, attempting to soldier on...\n");
 117         }
 118
 119         if (lasat_board_info.li_eeprom_info.version != LASAT_EEPROM_VERSION) {
 120                 printk(KERN_WARNING "WARNING...\nWARNING...\nEEPROM version "
 121                        "%d, wanted version %d, attempting to soldier on...\n",
 122                        (unsigned int)lasat_board_info.li_eeprom_info.version,
 123                        LASAT_EEPROM_VERSION);
 124         }
 125
 126         cfg0 = lasat_board_info.li_eeprom_info.cfg[0];
 127         cfg1 = lasat_board_info.li_eeprom_info.cfg[1];
 128
 129         if (LASAT_W0_DSCTYPE(cfg0) != 1) {
 130                 printk(KERN_WARNING "WARNING...\nWARNING...\n"
 131                        "Invalid configuration read from EEPROM, attempting to "
 132                        "soldier on...");
 133         }
 134         /* We have a valid configuration */
 135
 136         switch (LASAT_W0_SDRAMBANKSZ(cfg0)) {
 137         case 0:
 138                 lasat_board_info.li_memsize = 0x0800000;
 139                 break;
 140         case 1:
 141                 lasat_board_info.li_memsize = 0x1000000;
 142                 break;
 143         case 2:
 144                 lasat_board_info.li_memsize = 0x2000000;
 145                 break;
 146         case 3:
 147                 lasat_board_info.li_memsize = 0x4000000;
 148                 break;
 149         case 4:
 150                 lasat_board_info.li_memsize = 0x8000000;
 151                 break;
 152         default:
 153                 lasat_board_info.li_memsize = 0;
 154         }
 155
 156         switch (LASAT_W0_SDRAMBANKS(cfg0)) {
 157         case 0:
 158                 break;
 159         case 1:
 160                 lasat_board_info.li_memsize *= 2;
 161                 break;
 162         default:
 163                 break;
 164         }
 165
 166         switch (LASAT_W0_BUSSPEED(cfg0)) {
 167         case 0x0:
 168                 lasat_board_info.li_bus_hz = 60000000;
 169                 break;
 170         case 0x1:
 171                 lasat_board_info.li_bus_hz = 66000000;
 172                 break;
 173         case 0x2:
 174                 lasat_board_info.li_bus_hz = 66666667;
 175                 break;
 176         case 0x3:
 177                 lasat_board_info.li_bus_hz = 80000000;
 178                 break;
 179         case 0x4:
 180                 lasat_board_info.li_bus_hz = 83333333;
 181                 break;
 182         case 0x5:
 183                 lasat_board_info.li_bus_hz = 100000000;
 184                 break;
 185         }
 186
 187         switch (LASAT_W0_CPUCLK(cfg0)) {
 188         case 0x0:
 189                 lasat_board_info.li_cpu_hz =
 190                         lasat_board_info.li_bus_hz;
 191                 break;
 192         case 0x1:
 193                 lasat_board_info.li_cpu_hz =
 194                         lasat_board_info.li_bus_hz +
 195                         (lasat_board_info.li_bus_hz >> 1);
 196                 break;
 197         case 0x2:
 198                 lasat_board_info.li_cpu_hz =
 199                         lasat_board_info.li_bus_hz +
 200                         lasat_board_info.li_bus_hz;
 201                 break;
 202         case 0x3:
 203                 lasat_board_info.li_cpu_hz =
 204                         lasat_board_info.li_bus_hz +
 205                         lasat_board_info.li_bus_hz +
 206                         (lasat_board_info.li_bus_hz >> 1);
 207                 break;
 208         case 0x4:
 209                 lasat_board_info.li_cpu_hz =
 210                         lasat_board_info.li_bus_hz +
 211                         lasat_board_info.li_bus_hz +
 212                         lasat_board_info.li_bus_hz;
 213                 break;
 214         }
 215
 216         /* Flash size */
 217         switch (LASAT_W1_FLASHSIZE(cfg1)) {
 218         case 0:
 219                 lasat_board_info.li_flash_size = 0x200000;
 220                 break;
 221         case 1:
 222                 lasat_board_info.li_flash_size = 0x400000;
 223                 break;
 224         case 2:
 225                 lasat_board_info.li_flash_size = 0x800000;
 226                 break;
 227         case 3:
 228                 lasat_board_info.li_flash_size = 0x1000000;
 229                 break;
 230         case 4:
 231                 lasat_board_info.li_flash_size = 0x2000000;
 232                 break;
 233         }
 234
 235         init_flash_sizes();
 236
 237         lasat_board_info.li_bmid = LASAT_W0_BMID(cfg0);
 238         lasat_board_info.li_prid = lasat_board_info.li_eeprom_info.prid;
 239         if (lasat_board_info.li_prid == 0xffff || lasat_board_info.li_prid == 0)
 240                 lasat_board_info.li_prid = lasat_board_info.li_bmid;
 241
 242         /* Base model stuff */
 243         if (lasat_board_info.li_bmid > i_n_base_models)
 244                 lasat_board_info.li_bmid = i_n_base_models;
 245         strcpy(lasat_board_info.li_bmstr,
 246                i_txt_base_models[lasat_board_info.li_bmid]);
 247
 248         /* Product ID dependent values */
 249         c = lasat_board_info.li_prid;
 250         if (c >= i_n_prids) {
 251                 strcpy(lasat_board_info.li_namestr, "Unknown Model");
 252                 strcpy(lasat_board_info.li_typestr, "Unknown Type");
 253         } else {
 254                 ppi = &vendor_info_table[0].vi_product_info[c];
 255                 strcpy(lasat_board_info.li_namestr, ppi->pi_name);
 256                 if (ppi->pi_type)
 257                         strcpy(lasat_board_info.li_typestr, ppi->pi_type);
 258                 else
 259                         sprintf(lasat_board_info.li_typestr, "%d", 10 * c);
 260         }
 261
 262         return 0;
 263 }
 264
 265 void lasat_write_eeprom_info(void)
 266 {
 267         unsigned long crc;
 268
 269         mutex_lock(&lasat_eeprom_mutex);
 270
 271         /* Generate the CRC */
 272         crc = EEPROM_CRC((unsigned char *)(&lasat_board_info.li_eeprom_info),
 273                     sizeof(struct lasat_eeprom_struct) - 4);
 274         lasat_board_info.li_eeprom_info.crc32 = crc;
 275
 276         /* Write the EEPROM info */
 277         EEPROMWrite(0, (unsigned char *)&lasat_board_info.li_eeprom_info,
 278                     sizeof(struct lasat_eeprom_struct));
 279
 280         mutex_unlock(&lasat_eeprom_mutex);
 281 }