release/src-rt-6.x.4708/linux/linux-2.6.36/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/addrspace.h>
  28 #include "at93c.h"
  29 /* New model description table */
  30 #include "lasat_models.h"
  31
  32 static DEFINE_MUTEX(lasat_eeprom_mutex);
  33
  34 #define EEPROM_CRC(data, len) (~crc32(~0, data, len))
  35
  36 struct lasat_info lasat_board_info;
  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
  48 int EEPROMWrite(unsigned int pos, unsigned char *data, int len)
  49 {
  50         int i;
  51
  52         for (i = 0; i < len; i++)
  53                 at93c_write(pos++, *data++);
  54
  55         return 0;
  56 }
  57
  58 static void init_flash_sizes(void)
  59 {
  60         unsigned long *lb = lasat_board_info.li_flashpart_base;
  61         unsigned long *ls = lasat_board_info.li_flashpart_size;
  62         int i;
  63
  64         ls[LASAT_MTD_BOOTLOADER] = 0x40000;
  65         ls[LASAT_MTD_SERVICE] = 0xC0000;
  66         ls[LASAT_MTD_NORMAL] = 0x100000;
  67
  68         if (!IS_LASAT_200()) {
  69                 lasat_board_info.li_flash_base = 0x1e000000;
  70
  71                 lb[LASAT_MTD_BOOTLOADER] = 0x1e400000;
  72
  73                 if (lasat_board_info.li_flash_size > 0x200000) {
  74                         ls[LASAT_MTD_CONFIG] = 0x100000;
  75                         ls[LASAT_MTD_FS] = 0x500000;
  76                 }
  77         } else {
  78                 lasat_board_info.li_flash_base = 0x10000000;
  79
  80                 if (lasat_board_info.li_flash_size < 0x1000000) {
  81                         lb[LASAT_MTD_BOOTLOADER] = 0x10000000;
  82                         ls[LASAT_MTD_CONFIG] = 0x100000;
  83                         if (lasat_board_info.li_flash_size >= 0x400000)
  84                                 ls[LASAT_MTD_FS] =
  85                                      lasat_board_info.li_flash_size - 0x300000;
  86                 }
  87         }
  88
  89         for (i = 1; i < LASAT_MTD_LAST; i++)
  90                 lb[i] = lb[i-1] + ls[i-1];
  91 }
  92
  93 int lasat_init_board_info(void)
  94 {
  95         int c;
  96         unsigned long crc;
  97         unsigned long cfg0, cfg1;
  98         const struct product_info   *ppi;
  99         int i_n_base_models = N_BASE_MODELS;
 100         const char * const * i_txt_base_models = txt_base_models;
 101         int i_n_prids = N_PRIDS;
 102
 103         memset(&lasat_board_info, 0, sizeof(lasat_board_info));
 104
 105         /* First read the EEPROM info */
 106         EEPROMRead(0, (unsigned char *)&lasat_board_info.li_eeprom_info,
 107                    sizeof(struct lasat_eeprom_struct));
 108
 109         /* Check the CRC */
 110         crc = EEPROM_CRC((unsigned char *)(&lasat_board_info.li_eeprom_info),
 111                     sizeof(struct lasat_eeprom_struct) - 4);
 112
 113         if (crc != lasat_board_info.li_eeprom_info.crc32) {
 114                 printk(KERN_WARNING "WARNING...\nWARNING...\nEEPROM CRC does "
 115                        "not match calculated, attempting to soldier on...\n");
 116         }
 117
 118         if (lasat_board_info.li_eeprom_info.version != LASAT_EEPROM_VERSION) {
 119                 printk(KERN_WARNING "WARNING...\nWARNING...\nEEPROM version "
 120                        "%d, wanted version %d, attempting to soldier on...\n",
 121                        (unsigned int)lasat_board_info.li_eeprom_info.version,
 122                        LASAT_EEPROM_VERSION);
 123         }
 124
 125         cfg0 = lasat_board_info.li_eeprom_info.cfg[0];
 126         cfg1 = lasat_board_info.li_eeprom_info.cfg[1];
 127
 128         if (LASAT_W0_DSCTYPE(cfg0) != 1) {
 129                 printk(KERN_WARNING "WARNING...\nWARNING...\n"
 130                        "Invalid configuration read from EEPROM, attempting to "
 131                        "soldier on...");
 132         }
 133         /* We have a valid configuration */
 134
 135         switch (LASAT_W0_SDRAMBANKSZ(cfg0)) {
 136         case 0:
 137                 lasat_board_info.li_memsize = 0x0800000;
 138                 break;
 139         case 1:
 140                 lasat_board_info.li_memsize = 0x1000000;
 141                 break;
 142         case 2:
 143                 lasat_board_info.li_memsize = 0x2000000;
 144                 break;
 145         case 3:
 146                 lasat_board_info.li_memsize = 0x4000000;
 147                 break;
 148         case 4:
 149                 lasat_board_info.li_memsize = 0x8000000;
 150                 break;
 151         default:
 152                 lasat_board_info.li_memsize = 0;
 153         }
 154
 155         switch (LASAT_W0_SDRAMBANKS(cfg0)) {
 156         case 0:
 157                 break;
 158         case 1:
 159                 lasat_board_info.li_memsize *= 2;
 160                 break;
 161         default:
 162                 break;
 163         }
 164
 165         switch (LASAT_W0_BUSSPEED(cfg0)) {
 166         case 0x0:
 167                 lasat_board_info.li_bus_hz = 60000000;
 168                 break;
 169         case 0x1:
 170                 lasat_board_info.li_bus_hz = 66000000;
 171                 break;
 172         case 0x2:
 173                 lasat_board_info.li_bus_hz = 66666667;
 174                 break;
 175         case 0x3:
 176                 lasat_board_info.li_bus_hz = 80000000;
 177                 break;
 178         case 0x4:
 179                 lasat_board_info.li_bus_hz = 83333333;
 180                 break;
 181         case 0x5:
 182                 lasat_board_info.li_bus_hz = 100000000;
 183                 break;
 184         }
 185
 186         switch (LASAT_W0_CPUCLK(cfg0)) {
 187         case 0x0:
 188                 lasat_board_info.li_cpu_hz =
 189                         lasat_board_info.li_bus_hz;
 190                 break;
 191         case 0x1:
 192                 lasat_board_info.li_cpu_hz =
 193                         lasat_board_info.li_bus_hz +
 194                         (lasat_board_info.li_bus_hz >> 1);
 195                 break;
 196         case 0x2:
 197                 lasat_board_info.li_cpu_hz =
 198                         lasat_board_info.li_bus_hz +
 199                         lasat_board_info.li_bus_hz;
 200                 break;
 201         case 0x3:
 202                 lasat_board_info.li_cpu_hz =
 203                         lasat_board_info.li_bus_hz +
 204                         lasat_board_info.li_bus_hz +
 205                         (lasat_board_info.li_bus_hz >> 1);
 206                 break;
 207         case 0x4:
 208                 lasat_board_info.li_cpu_hz =
 209                         lasat_board_info.li_bus_hz +
 210                         lasat_board_info.li_bus_hz +
 211                         lasat_board_info.li_bus_hz;
 212                 break;
 213         }
 214
 215         /* Flash size */
 216         switch (LASAT_W1_FLASHSIZE(cfg1)) {
 217         case 0:
 218                 lasat_board_info.li_flash_size = 0x200000;
 219                 break;
 220         case 1:
 221                 lasat_board_info.li_flash_size = 0x400000;
 222                 break;
 223         case 2:
 224                 lasat_board_info.li_flash_size = 0x800000;
 225                 break;
 226         case 3:
 227                 lasat_board_info.li_flash_size = 0x1000000;
 228                 break;
 229         case 4:
 230                 lasat_board_info.li_flash_size = 0x2000000;
 231                 break;
 232         }
 233
 234         init_flash_sizes();
 235
 236         lasat_board_info.li_bmid = LASAT_W0_BMID(cfg0);
 237         lasat_board_info.li_prid = lasat_board_info.li_eeprom_info.prid;
 238         if (lasat_board_info.li_prid == 0xffff || lasat_board_info.li_prid == 0)
 239                 lasat_board_info.li_prid = lasat_board_info.li_bmid;
 240
 241         /* Base model stuff */
 242         if (lasat_board_info.li_bmid > i_n_base_models)
 243                 lasat_board_info.li_bmid = i_n_base_models;
 244         strcpy(lasat_board_info.li_bmstr,
 245                i_txt_base_models[lasat_board_info.li_bmid]);
 246
 247         /* Product ID dependent values */
 248         c = lasat_board_info.li_prid;
 249         if (c >= i_n_prids) {
 250                 strcpy(lasat_board_info.li_namestr, "Unknown Model");
 251                 strcpy(lasat_board_info.li_typestr, "Unknown Type");
 252         } else {
 253                 ppi = &vendor_info_table[0].vi_product_info[c];
 254                 strcpy(lasat_board_info.li_namestr, ppi->pi_name);
 255                 if (ppi->pi_type)
 256                         strcpy(lasat_board_info.li_typestr, ppi->pi_type);
 257                 else
 258                         sprintf(lasat_board_info.li_typestr, "%d", 10 * c);
 259         }
 260
 261         return 0;
 262 }
 263
 264 void lasat_write_eeprom_info(void)
 265 {
 266         unsigned long crc;
 267
 268         mutex_lock(&lasat_eeprom_mutex);
 269
 270         /* Generate the CRC */
 271         crc = EEPROM_CRC((unsigned char *)(&lasat_board_info.li_eeprom_info),
 272                     sizeof(struct lasat_eeprom_struct) - 4);
 273         lasat_board_info.li_eeprom_info.crc32 = crc;
 274
 275         /* Write the EEPROM info */
 276         EEPROMWrite(0, (unsigned char *)&lasat_board_info.li_eeprom_info,
 277                     sizeof(struct lasat_eeprom_struct));
 278
 279         mutex_unlock(&lasat_eeprom_mutex);
 280 }