git.oblomov.eu Git - linux-2.6/blob - arch/mips/cavium-octeon/executive/octeon-model.c

   1 /***********************license start***************
   2  * Author: Cavium Networks
   3  *
   4  * Contact: support@caviumnetworks.com
   5  * This file is part of the OCTEON SDK
   6  *
   7  * Copyright (c) 2003-2008 Cavium Networks
   8  *
   9  * This file is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License, Version 2, as
  11  * published by the Free Software Foundation.
  12  *
  13  * This file is distributed in the hope that it will be useful, but
  14  * AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty
  15  * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or
  16  * NONINFRINGEMENT.  See the GNU General Public License for more
  17  * details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this file; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  22  * or visit http://www.gnu.org/licenses/.
  23  *
  24  * This file may also be available under a different license from Cavium.
  25  * Contact Cavium Networks for more information
  26  ***********************license end**************************************/
  27
  28 /*
  29  * File defining functions for working with different Octeon
  30  * models.
  31  */
  32 #include <asm/octeon/octeon.h>
  33
  34 /**
  35  * Given the chip processor ID from COP0, this function returns a
  36  * string representing the chip model number. The string is of the
  37  * form CNXXXXpX.X-FREQ-SUFFIX.
  38  * - XXXX = The chip model number
  39  * - X.X = Chip pass number
  40  * - FREQ = Current frequency in Mhz
  41  * - SUFFIX = NSP, EXP, SCP, SSP, or CP
  42  *
  43  * @chip_id: Chip ID
  44  *
  45  * Returns Model string
  46  */
  47 const char *octeon_model_get_string(uint32_t chip_id)
  48 {
  49         static char buffer[32];
  50         return octeon_model_get_string_buffer(chip_id, buffer);
  51 }
  52
  53 /*
  54  * Version of octeon_model_get_string() that takes buffer as argument,
  55  * as running early in u-boot static/global variables don't work when
  56  * running from flash.
  57  */
  58 const char *octeon_model_get_string_buffer(uint32_t chip_id, char *buffer)
  59 {
  60         const char *family;
  61         const char *core_model;
  62         char pass[4];
  63         int clock_mhz;
  64         const char *suffix;
  65         union cvmx_l2d_fus3 fus3;
  66         int num_cores;
  67         union cvmx_mio_fus_dat2 fus_dat2;
  68         union cvmx_mio_fus_dat3 fus_dat3;
  69         char fuse_model[10];
  70         uint32_t fuse_data = 0;
  71
  72         fus3.u64 = cvmx_read_csr(CVMX_L2D_FUS3);
  73         fus_dat2.u64 = cvmx_read_csr(CVMX_MIO_FUS_DAT2);
  74         fus_dat3.u64 = cvmx_read_csr(CVMX_MIO_FUS_DAT3);
  75
  76         num_cores = cvmx_octeon_num_cores();
  77
  78         /* Make sure the non existant devices look disabled */
  79         switch ((chip_id >> 8) & 0xff) {
  80         case 6:         /* CN50XX */
  81         case 2:         /* CN30XX */
  82                 fus_dat3.s.nodfa_dte = 1;
  83                 fus_dat3.s.nozip = 1;
  84                 break;
  85         case 4:         /* CN57XX or CN56XX */
  86                 fus_dat3.s.nodfa_dte = 1;
  87                 break;
  88         default:
  89                 break;
  90         }
  91
  92         /* Make a guess at the suffix */
  93         /* NSP = everything */
  94         /* EXP = No crypto */
  95         /* SCP = No DFA, No zip */
  96         /* CP = No DFA, No crypto, No zip */
  97         if (fus_dat3.s.nodfa_dte) {
  98                 if (fus_dat2.s.nocrypto)
  99                         suffix = "CP";
 100                 else
 101                         suffix = "SCP";
 102         } else if (fus_dat2.s.nocrypto)
 103                 suffix = "EXP";
 104         else
 105                 suffix = "NSP";
 106
 107         /*
 108          * Assume pass number is encoded using <5:3><2:0>. Exceptions
 109          * will be fixed later.
 110          */
 111         sprintf(pass, "%u.%u", ((chip_id >> 3) & 7) + 1, chip_id & 7);
 112
 113         /*
 114          * Use the number of cores to determine the last 2 digits of
 115          * the model number. There are some exceptions that are fixed
 116          * later.
 117          */
 118         switch (num_cores) {
 119         case 16:
 120                 core_model = "60";
 121                 break;
 122         case 15:
 123                 core_model = "58";
 124                 break;
 125         case 14:
 126                 core_model = "55";
 127                 break;
 128         case 13:
 129                 core_model = "52";
 130                 break;
 131         case 12:
 132                 core_model = "50";
 133                 break;
 134         case 11:
 135                 core_model = "48";
 136                 break;
 137         case 10:
 138                 core_model = "45";
 139                 break;
 140         case 9:
 141                 core_model = "42";
 142                 break;
 143         case 8:
 144                 core_model = "40";
 145                 break;
 146         case 7:
 147                 core_model = "38";
 148                 break;
 149         case 6:
 150                 core_model = "34";
 151                 break;
 152         case 5:
 153                 core_model = "32";
 154                 break;
 155         case 4:
 156                 core_model = "30";
 157                 break;
 158         case 3:
 159                 core_model = "25";
 160                 break;
 161         case 2:
 162                 core_model = "20";
 163                 break;
 164         case 1:
 165                 core_model = "10";
 166                 break;
 167         default:
 168                 core_model = "XX";
 169                 break;
 170         }
 171
 172         /* Now figure out the family, the first two digits */
 173         switch ((chip_id >> 8) & 0xff) {
 174         case 0:         /* CN38XX, CN37XX or CN36XX */
 175                 if (fus3.cn38xx.crip_512k) {
 176                         /*
 177                          * For some unknown reason, the 16 core one is
 178                          * called 37 instead of 36.
 179                          */
 180                         if (num_cores >= 16)
 181                                 family = "37";
 182                         else
 183                                 family = "36";
 184                 } else
 185                         family = "38";
 186                 /*
 187                  * This series of chips didn't follow the standard
 188                  * pass numbering.
 189                  */
 190                 switch (chip_id & 0xf) {
 191                 case 0:
 192                         strcpy(pass, "1.X");
 193                         break;
 194                 case 1:
 195                         strcpy(pass, "2.X");
 196                         break;
 197                 case 3:
 198                         strcpy(pass, "3.X");
 199                         break;
 200                 default:
 201                         strcpy(pass, "X.X");
 202                         break;
 203                 }
 204                 break;
 205         case 1:         /* CN31XX or CN3020 */
 206                 if ((chip_id & 0x10) || fus3.cn31xx.crip_128k)
 207                         family = "30";
 208                 else
 209                         family = "31";
 210                 /*
 211                  * This series of chips didn't follow the standard
 212                  * pass numbering.
 213                  */
 214                 switch (chip_id & 0xf) {
 215                 case 0:
 216                         strcpy(pass, "1.0");
 217                         break;
 218                 case 2:
 219                         strcpy(pass, "1.1");
 220                         break;
 221                 default:
 222                         strcpy(pass, "X.X");
 223                         break;
 224                 }
 225                 break;
 226         case 2:         /* CN3010 or CN3005 */
 227                 family = "30";
 228                 /* A chip with half cache is an 05 */
 229                 if (fus3.cn30xx.crip_64k)
 230                         core_model = "05";
 231                 /*
 232                  * This series of chips didn't follow the standard
 233                  * pass numbering.
 234                  */
 235                 switch (chip_id & 0xf) {
 236                 case 0:
 237                         strcpy(pass, "1.0");
 238                         break;
 239                 case 2:
 240                         strcpy(pass, "1.1");
 241                         break;
 242                 default:
 243                         strcpy(pass, "X.X");
 244                         break;
 245                 }
 246                 break;
 247         case 3:         /* CN58XX */
 248                 family = "58";
 249                 /* Special case. 4 core, no crypto */
 250                 if ((num_cores == 4) && fus_dat2.cn38xx.nocrypto)
 251                         core_model = "29";
 252
 253                 /* Pass 1 uses different encodings for pass numbers */
 254                 if ((chip_id & 0xFF) < 0x8) {
 255                         switch (chip_id & 0x3) {
 256                         case 0:
 257                                 strcpy(pass, "1.0");
 258                                 break;
 259                         case 1:
 260                                 strcpy(pass, "1.1");
 261                                 break;
 262                         case 3:
 263                                 strcpy(pass, "1.2");
 264                                 break;
 265                         default:
 266                                 strcpy(pass, "1.X");
 267                                 break;
 268                         }
 269                 }
 270                 break;
 271         case 4:         /* CN57XX, CN56XX, CN55XX, CN54XX */
 272                 if (fus_dat2.cn56xx.raid_en) {
 273                         if (fus3.cn56xx.crip_1024k)
 274                                 family = "55";
 275                         else
 276                                 family = "57";
 277                         if (fus_dat2.cn56xx.nocrypto)
 278                                 suffix = "SP";
 279                         else
 280                                 suffix = "SSP";
 281                 } else {
 282                         if (fus_dat2.cn56xx.nocrypto)
 283                                 suffix = "CP";
 284                         else {
 285                                 suffix = "NSP";
 286                                 if (fus_dat3.s.nozip)
 287                                         suffix = "SCP";
 288                         }
 289                         if (fus3.cn56xx.crip_1024k)
 290                                 family = "54";
 291                         else
 292                                 family = "56";
 293                 }
 294                 break;
 295         case 6:         /* CN50XX */
 296                 family = "50";
 297                 break;
 298         case 7:         /* CN52XX */
 299                 if (fus3.cn52xx.crip_256k)
 300                         family = "51";
 301                 else
 302                         family = "52";
 303                 break;
 304         default:
 305                 family = "XX";
 306                 core_model = "XX";
 307                 strcpy(pass, "X.X");
 308                 suffix = "XXX";
 309                 break;
 310         }
 311
 312         clock_mhz = octeon_get_clock_rate() / 1000000;
 313
 314         if (family[0] != '3') {
 315                 /* Check for model in fuses, overrides normal decode */
 316                 /* This is _not_ valid for Octeon CN3XXX models */
 317                 fuse_data |= cvmx_fuse_read_byte(51);
 318                 fuse_data = fuse_data << 8;
 319                 fuse_data |= cvmx_fuse_read_byte(50);
 320                 fuse_data = fuse_data << 8;
 321                 fuse_data |= cvmx_fuse_read_byte(49);
 322                 fuse_data = fuse_data << 8;
 323                 fuse_data |= cvmx_fuse_read_byte(48);
 324                 if (fuse_data & 0x7ffff) {
 325                         int model = fuse_data & 0x3fff;
 326                         int suffix = (fuse_data >> 14) & 0x1f;
 327                         if (suffix && model) {
 328                                 /*
 329                                  * Have both number and suffix in
 330                                  * fuses, so both
 331                                  */
 332                                 sprintf(fuse_model, "%d%c",
 333                                         model, 'A' + suffix - 1);
 334                                 core_model = "";
 335                                 family = fuse_model;
 336                         } else if (suffix && !model) {
 337                                 /*
 338                                  * Only have suffix, so add suffix to
 339                                  * 'normal' model number.
 340                                  */
 341                                 sprintf(fuse_model, "%s%c", core_model,
 342                                         'A' + suffix - 1);
 343                                 core_model = fuse_model;
 344                         } else {
 345                                 /*
 346                                  * Don't have suffix, so just use
 347                                  * model from fuses.
 348                                  */
 349                                 sprintf(fuse_model, "%d", model);
 350                                 core_model = "";
 351                                 family = fuse_model;
 352                         }
 353                 }
 354         }
 355         sprintf(buffer, "CN%s%sp%s-%d-%s",
 356                 family, core_model, pass, clock_mhz, suffix);
 357         return buffer;
 358 }