arch/arm/mach-omap2/id.c

   1 /*
   2  * linux/arch/arm/mach-omap2/id.c
   3  *
   4  * OMAP2 CPU identification code
   5  *
   6  * Copyright (C) 2005 Nokia Corporation
   7  * Written by Tony Lindgren <tony@atomide.com>
   8  *
   9  * Copyright (C) 2009-11 Texas Instruments
  10  * Added OMAP4 support - Santosh Shilimkar <santosh.shilimkar@ti.com>
  11  *
  12  * This program is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU General Public License version 2 as
  14  * published by the Free Software Foundation.
  15  */
  16
  17 #include <linux/module.h>
  18 #include <linux/kernel.h>
  19 #include <linux/init.h>
  20 #include <linux/io.h>
  21
  22 #include <asm/cputype.h>
  23
  24 #include "common.h"
  25 #include <plat/cpu.h>
  26
  27 #include <mach/id.h>
  28
  29 #include "control.h"
  30
  31 static unsigned int omap_revision;
  32
  33 u32 omap_features;
  34
  35 unsigned int omap_rev(void)
  36 {
  37         return omap_revision;
  38 }
  39 EXPORT_SYMBOL(omap_rev);
  40
  41 int omap_type(void)
  42 {
  43         u32 val = 0;
  44
  45         if (cpu_is_omap24xx()) {
  46                 val = omap_ctrl_readl(OMAP24XX_CONTROL_STATUS);
  47         } else if (cpu_is_omap34xx()) {
  48                 val = omap_ctrl_readl(OMAP343X_CONTROL_STATUS);
  49         } else if (cpu_is_omap44xx()) {
  50                 val = omap_ctrl_readl(OMAP4_CTRL_MODULE_CORE_STATUS);
  51         } else {
  52                 pr_err("Cannot detect omap type!\n");
  53                 goto out;
  54         }
  55
  56         val &= OMAP2_DEVICETYPE_MASK;
  57         val >>= 8;
  58
  59 out:
  60         return val;
  61 }
  62 EXPORT_SYMBOL(omap_type);
  63
  64
  65 /*----------------------------------------------------------------------------*/
  66
  67 #define OMAP_TAP_IDCODE         0x0204
  68 #define OMAP_TAP_DIE_ID_0       0x0218
  69 #define OMAP_TAP_DIE_ID_1       0x021C
  70 #define OMAP_TAP_DIE_ID_2       0x0220
  71 #define OMAP_TAP_DIE_ID_3       0x0224
  72
  73 #define OMAP_TAP_DIE_ID_44XX_0  0x0200
  74 #define OMAP_TAP_DIE_ID_44XX_1  0x0208
  75 #define OMAP_TAP_DIE_ID_44XX_2  0x020c
  76 #define OMAP_TAP_DIE_ID_44XX_3  0x0210
  77
  78 #define read_tap_reg(reg)       __raw_readl(tap_base  + (reg))
  79
  80 struct omap_id {
  81         u16     hawkeye;        /* Silicon type (Hawkeye id) */
  82         u8      dev;            /* Device type from production_id reg */
  83         u32     type;           /* Combined type id copied to omap_revision */
  84 };
  85
  86 /* Register values to detect the OMAP version */
  87 static struct omap_id omap_ids[] __initdata = {
  88         { .hawkeye = 0xb5d9, .dev = 0x0, .type = 0x24200024 },
  89         { .hawkeye = 0xb5d9, .dev = 0x1, .type = 0x24201024 },
  90         { .hawkeye = 0xb5d9, .dev = 0x2, .type = 0x24202024 },
  91         { .hawkeye = 0xb5d9, .dev = 0x4, .type = 0x24220024 },
  92         { .hawkeye = 0xb5d9, .dev = 0x8, .type = 0x24230024 },
  93         { .hawkeye = 0xb68a, .dev = 0x0, .type = 0x24300024 },
  94 };
  95
  96 static void __iomem *tap_base;
  97 static u16 tap_prod_id;
  98
  99 void omap_get_die_id(struct omap_die_id *odi)
 100 {
 101         if (cpu_is_omap44xx()) {
 102                 odi->id_0 = read_tap_reg(OMAP_TAP_DIE_ID_44XX_0);
 103                 odi->id_1 = read_tap_reg(OMAP_TAP_DIE_ID_44XX_1);
 104                 odi->id_2 = read_tap_reg(OMAP_TAP_DIE_ID_44XX_2);
 105                 odi->id_3 = read_tap_reg(OMAP_TAP_DIE_ID_44XX_3);
 106
 107                 return;
 108         }
 109         odi->id_0 = read_tap_reg(OMAP_TAP_DIE_ID_0);
 110         odi->id_1 = read_tap_reg(OMAP_TAP_DIE_ID_1);
 111         odi->id_2 = read_tap_reg(OMAP_TAP_DIE_ID_2);
 112         odi->id_3 = read_tap_reg(OMAP_TAP_DIE_ID_3);
 113 }
 114
 115 static void __init omap24xx_check_revision(void)
 116 {
 117         int i, j;
 118         u32 idcode, prod_id;
 119         u16 hawkeye;
 120         u8  dev_type, rev;
 121         struct omap_die_id odi;
 122
 123         idcode = read_tap_reg(OMAP_TAP_IDCODE);
 124         prod_id = read_tap_reg(tap_prod_id);
 125         hawkeye = (idcode >> 12) & 0xffff;
 126         rev = (idcode >> 28) & 0x0f;
 127         dev_type = (prod_id >> 16) & 0x0f;
 128         omap_get_die_id(&odi);
 129
 130         pr_debug("OMAP_TAP_IDCODE 0x%08x REV %i HAWKEYE 0x%04x MANF %03x\n",
 131                  idcode, rev, hawkeye, (idcode >> 1) & 0x7ff);
 132         pr_debug("OMAP_TAP_DIE_ID_0: 0x%08x\n", odi.id_0);
 133         pr_debug("OMAP_TAP_DIE_ID_1: 0x%08x DEV_REV: %i\n",
 134                  odi.id_1, (odi.id_1 >> 28) & 0xf);
 135         pr_debug("OMAP_TAP_DIE_ID_2: 0x%08x\n", odi.id_2);
 136         pr_debug("OMAP_TAP_DIE_ID_3: 0x%08x\n", odi.id_3);
 137         pr_debug("OMAP_TAP_PROD_ID_0: 0x%08x DEV_TYPE: %i\n",
 138                  prod_id, dev_type);
 139
 140         /* Check hawkeye ids */
 141         for (i = 0; i < ARRAY_SIZE(omap_ids); i++) {
 142                 if (hawkeye == omap_ids[i].hawkeye)
 143                         break;
 144         }
 145
 146         if (i == ARRAY_SIZE(omap_ids)) {
 147                 printk(KERN_ERR "Unknown OMAP CPU id\n");
 148                 return;
 149         }
 150
 151         for (j = i; j < ARRAY_SIZE(omap_ids); j++) {
 152                 if (dev_type == omap_ids[j].dev)
 153                         break;
 154         }
 155
 156         if (j == ARRAY_SIZE(omap_ids)) {
 157                 printk(KERN_ERR "Unknown OMAP device type. "
 158                                 "Handling it as OMAP%04x\n",
 159                                 omap_ids[i].type >> 16);
 160                 j = i;
 161         }
 162
 163         pr_info("OMAP%04x", omap_rev() >> 16);
 164         if ((omap_rev() >> 8) & 0x0f)
 165                 pr_info("ES%x", (omap_rev() >> 12) & 0xf);
 166         pr_info("\n");
 167 }
 168
 169 #define OMAP3_CHECK_FEATURE(status,feat)                                \
 170         if (((status & OMAP3_ ##feat## _MASK)                           \
 171                 >> OMAP3_ ##feat## _SHIFT) != FEAT_ ##feat## _NONE) {   \
 172                 omap_features |= OMAP3_HAS_ ##feat;                     \
 173         }
 174
 175 static void __init omap3_check_features(void)
 176 {
 177         u32 status;
 178
 179         omap_features = 0;
 180
 181         status = omap_ctrl_readl(OMAP3_CONTROL_OMAP_STATUS);
 182
 183         OMAP3_CHECK_FEATURE(status, L2CACHE);
 184         OMAP3_CHECK_FEATURE(status, IVA);
 185         OMAP3_CHECK_FEATURE(status, SGX);
 186         OMAP3_CHECK_FEATURE(status, NEON);
 187         OMAP3_CHECK_FEATURE(status, ISP);
 188         if (cpu_is_omap3630())
 189                 omap_features |= OMAP3_HAS_192MHZ_CLK;
 190         if (cpu_is_omap3430() || cpu_is_omap3630())
 191                 omap_features |= OMAP3_HAS_IO_WAKEUP;
 192         if (cpu_is_omap3630() || omap_rev() == OMAP3430_REV_ES3_1 ||
 193             omap_rev() == OMAP3430_REV_ES3_1_2)
 194                 omap_features |= OMAP3_HAS_IO_CHAIN_CTRL;
 195
 196         omap_features |= OMAP3_HAS_SDRC;
 197
 198         /*
 199          * TODO: Get additional info (where applicable)
 200          *       e.g. Size of L2 cache.
 201          */
 202 }
 203
 204 static void __init omap4_check_features(void)
 205 {
 206         u32 si_type;
 207
 208         if (cpu_is_omap443x())
 209                 omap_features |= OMAP4_HAS_MPU_1GHZ;
 210
 211
 212         if (cpu_is_omap446x()) {
 213                 si_type =
 214                         read_tap_reg(OMAP4_CTRL_MODULE_CORE_STD_FUSE_PROD_ID_1);
 215                 switch ((si_type & (3 << 16)) >> 16) {
 216                 case 2:
 217                         /* High performance device */
 218                         omap_features |= OMAP4_HAS_MPU_1_5GHZ;
 219                         break;
 220                 case 1:
 221                 default:
 222                         /* Standard device */
 223                         omap_features |= OMAP4_HAS_MPU_1_2GHZ;
 224                         break;
 225                 }
 226         }
 227 }
 228
 229 static void __init ti81xx_check_features(void)
 230 {
 231         omap_features = OMAP3_HAS_NEON;
 232 }
 233
 234 static void __init omap3_check_revision(const char **cpu_rev)
 235 {
 236         u32 cpuid, idcode;
 237         u16 hawkeye;
 238         u8 rev;
 239
 240         /*
 241          * We cannot access revision registers on ES1.0.
 242          * If the processor type is Cortex-A8 and the revision is 0x0
 243          * it means its Cortex r0p0 which is 3430 ES1.0.
 244          */
 245         cpuid = read_cpuid(CPUID_ID);
 246         if ((((cpuid >> 4) & 0xfff) == 0xc08) && ((cpuid & 0xf) == 0x0)) {
 247                 omap_revision = OMAP3430_REV_ES1_0;
 248                 *cpu_rev = "1.0";
 249                 return;
 250         }
 251
 252         /*
 253          * Detection for 34xx ES2.0 and above can be done with just
 254          * hawkeye and rev. See TRM 1.5.2 Device Identification.
 255          * Note that rev does not map directly to our defined processor
 256          * revision numbers as ES1.0 uses value 0.
 257          */
 258         idcode = read_tap_reg(OMAP_TAP_IDCODE);
 259         hawkeye = (idcode >> 12) & 0xffff;
 260         rev = (idcode >> 28) & 0xff;
 261
 262         switch (hawkeye) {
 263         case 0xb7ae:
 264                 /* Handle 34xx/35xx devices */
 265                 switch (rev) {
 266                 case 0: /* Take care of early samples */
 267                 case 1:
 268                         omap_revision = OMAP3430_REV_ES2_0;
 269                         *cpu_rev = "2.0";
 270                         break;
 271                 case 2:
 272                         omap_revision = OMAP3430_REV_ES2_1;
 273                         *cpu_rev = "2.1";
 274                         break;
 275                 case 3:
 276                         omap_revision = OMAP3430_REV_ES3_0;
 277                         *cpu_rev = "3.0";
 278                         break;
 279                 case 4:
 280                         omap_revision = OMAP3430_REV_ES3_1;
 281                         *cpu_rev = "3.1";
 282                         break;
 283                 case 7:
 284                 /* FALLTHROUGH */
 285                 default:
 286                         /* Use the latest known revision as default */
 287                         omap_revision = OMAP3430_REV_ES3_1_2;
 288                         *cpu_rev = "3.1.2";
 289                 }
 290                 break;
 291         case 0xb868:
 292                 /*
 293                  * Handle OMAP/AM 3505/3517 devices
 294                  *
 295                  * Set the device to be OMAP3517 here. Actual device
 296                  * is identified later based on the features.
 297                  */
 298                 switch (rev) {
 299                 case 0:
 300                         omap_revision = OMAP3517_REV_ES1_0;
 301                         *cpu_rev = "1.0";
 302                         break;
 303                 case 1:
 304                 /* FALLTHROUGH */
 305                 default:
 306                         omap_revision = OMAP3517_REV_ES1_1;
 307                         *cpu_rev = "1.1";
 308                 }
 309                 break;
 310         case 0xb891:
 311                 /* Handle 36xx devices */
 312
 313                 switch(rev) {
 314                 case 0: /* Take care of early samples */
 315                         omap_revision = OMAP3630_REV_ES1_0;
 316                         *cpu_rev = "1.0";
 317                         break;
 318                 case 1:
 319                         omap_revision = OMAP3630_REV_ES1_1;
 320                         *cpu_rev = "1.1";
 321                         break;
 322                 case 2:
 323                 /* FALLTHROUGH */
 324                 default:
 325                         omap_revision = OMAP3630_REV_ES1_2;
 326                         *cpu_rev = "1.2";
 327                 }
 328                 break;
 329         case 0xb81e:
 330                 switch (rev) {
 331                 case 0:
 332                         omap_revision = TI8168_REV_ES1_0;
 333                         *cpu_rev = "1.0";
 334                         break;
 335                 case 1:
 336                 /* FALLTHROUGH */
 337                 default:
 338                         omap_revision = TI8168_REV_ES1_1;
 339                         *cpu_rev = "1.1";
 340                         break;
 341                 }
 342                 break;
 343         case 0xb944:
 344                 omap_revision = AM335X_REV_ES1_0;
 345                 *cpu_rev = "1.0";
 346         case 0xb8f2:
 347                 switch (rev) {
 348                 case 0:
 349                 /* FALLTHROUGH */
 350                 case 1:
 351                         omap_revision = TI8148_REV_ES1_0;
 352                         *cpu_rev = "1.0";
 353                         break;
 354                 case 2:
 355                         omap_revision = TI8148_REV_ES2_0;
 356                         *cpu_rev = "2.0";
 357                         break;
 358                 case 3:
 359                 /* FALLTHROUGH */
 360                 default:
 361                         omap_revision = TI8148_REV_ES2_1;
 362                         *cpu_rev = "2.1";
 363                         break;
 364                 }
 365                 break;
 366         default:
 367                 /* Unknown default to latest silicon rev as default */
 368                 omap_revision = OMAP3630_REV_ES1_2;
 369                 *cpu_rev = "1.2";
 370                 pr_warn("Warning: unknown chip type; assuming OMAP3630ES1.2\n");
 371         }
 372 }
 373
 374 static void __init omap4_check_revision(void)
 375 {
 376         u32 idcode;
 377         u16 hawkeye;
 378         u8 rev;
 379
 380         /*
 381          * The IC rev detection is done with hawkeye and rev.
 382          * Note that rev does not map directly to defined processor
 383          * revision numbers as ES1.0 uses value 0.
 384          */
 385         idcode = read_tap_reg(OMAP_TAP_IDCODE);
 386         hawkeye = (idcode >> 12) & 0xffff;
 387         rev = (idcode >> 28) & 0xf;
 388
 389         /*
 390          * Few initial 4430 ES2.0 samples IDCODE is same as ES1.0
 391          * Use ARM register to detect the correct ES version
 392          */
 393         if (!rev && (hawkeye != 0xb94e) && (hawkeye != 0xb975)) {
 394                 idcode = read_cpuid(CPUID_ID);
 395                 rev = (idcode & 0xf) - 1;
 396         }
 397
 398         switch (hawkeye) {
 399         case 0xb852:
 400                 switch (rev) {
 401                 case 0:
 402                         omap_revision = OMAP4430_REV_ES1_0;
 403                         break;
 404                 case 1:
 405                 default:
 406                         omap_revision = OMAP4430_REV_ES2_0;
 407                 }
 408                 break;
 409         case 0xb95c:
 410                 switch (rev) {
 411                 case 3:
 412                         omap_revision = OMAP4430_REV_ES2_1;
 413                         break;
 414                 case 4:
 415                         omap_revision = OMAP4430_REV_ES2_2;
 416                         break;
 417                 case 6:
 418                 default:
 419                         omap_revision = OMAP4430_REV_ES2_3;
 420                 }
 421                 break;
 422         case 0xb94e:
 423                 switch (rev) {
 424                 case 0:
 425                 default:
 426                         omap_revision = OMAP4460_REV_ES1_0;
 427                         break;
 428                 }
 429                 break;
 430         case 0xb975:
 431                 switch (rev) {
 432                 case 0:
 433                 default:
 434                         omap_revision = OMAP4470_REV_ES1_0;
 435                         break;
 436                 }
 437                 break;
 438         default:
 439                 /* Unknown default to latest silicon rev as default */
 440                 omap_revision = OMAP4430_REV_ES2_3;
 441         }
 442
 443         pr_info("OMAP%04x ES%d.%d\n", omap_rev() >> 16,
 444                 ((omap_rev() >> 12) & 0xf), ((omap_rev() >> 8) & 0xf));
 445 }
 446
 447 #define OMAP3_SHOW_FEATURE(feat)                \
 448         if (omap3_has_ ##feat())                \
 449                 printk(#feat" ");
 450
 451 static void __init omap3_cpuinfo(const char *cpu_rev)
 452 {
 453         const char *cpu_name;
 454
 455         /*
 456          * OMAP3430 and OMAP3530 are assumed to be same.
 457          *
 458          * OMAP3525, OMAP3515 and OMAP3503 can be detected only based
 459          * on available features. Upon detection, update the CPU id
 460          * and CPU class bits.
 461          */
 462         if (cpu_is_omap3630()) {
 463                 cpu_name = "OMAP3630";
 464         } else if (cpu_is_omap3517()) {
 465                 /* AM35xx devices */
 466                 cpu_name = (omap3_has_sgx()) ? "AM3517" : "AM3505";
 467         } else if (cpu_is_ti816x()) {
 468                 cpu_name = "TI816X";
 469         } else if (cpu_is_am335x()) {
 470                 cpu_name =  "AM335X";
 471         } else if (cpu_is_ti814x()) {
 472                 cpu_name = "TI814X";
 473         } else if (omap3_has_iva() && omap3_has_sgx()) {
 474                 /* OMAP3430, OMAP3525, OMAP3515, OMAP3503 devices */
 475                 cpu_name = "OMAP3430/3530";
 476         } else if (omap3_has_iva()) {
 477                 cpu_name = "OMAP3525";
 478         } else if (omap3_has_sgx()) {
 479                 cpu_name = "OMAP3515";
 480         } else {
 481                 cpu_name = "OMAP3503";
 482         }
 483
 484         /* Print verbose information */
 485         pr_info("%s ES%s (", cpu_name, cpu_rev);
 486
 487         OMAP3_SHOW_FEATURE(l2cache);
 488         OMAP3_SHOW_FEATURE(iva);
 489         OMAP3_SHOW_FEATURE(sgx);
 490         OMAP3_SHOW_FEATURE(neon);
 491         OMAP3_SHOW_FEATURE(isp);
 492         OMAP3_SHOW_FEATURE(192mhz_clk);
 493
 494         printk(")\n");
 495 }
 496
 497 /*
 498  * Try to detect the exact revision of the omap we're running on
 499  */
 500 void __init omap2_check_revision(void)
 501 {
 502         const char *cpu_rev;
 503
 504         /*
 505          * At this point we have an idea about the processor revision set
 506          * earlier with omap2_set_globals_tap().
 507          */
 508         if (cpu_is_omap24xx()) {
 509                 omap24xx_check_revision();
 510         } else if (cpu_is_omap34xx()) {
 511                 omap3_check_revision(&cpu_rev);
 512
 513                 /* TI81XX doesn't have feature register */
 514                 if (!cpu_is_ti81xx())
 515                         omap3_check_features();
 516                 else
 517                         ti81xx_check_features();
 518
 519                 omap3_cpuinfo(cpu_rev);
 520                 return;
 521         } else if (cpu_is_omap44xx()) {
 522                 omap4_check_revision();
 523                 omap4_check_features();
 524                 return;
 525         } else {
 526                 pr_err("OMAP revision unknown, please fix!\n");
 527         }
 528 }
 529
 530 /*
 531  * Set up things for map_io and processor detection later on. Gets called
 532  * pretty much first thing from board init. For multi-omap, this gets
 533  * cpu_is_omapxxxx() working accurately enough for map_io. Then we'll try to
 534  * detect the exact revision later on in omap2_detect_revision() once map_io
 535  * is done.
 536  */
 537 void __init omap2_set_globals_tap(struct omap_globals *omap2_globals)
 538 {
 539         omap_revision = omap2_globals->class;
 540         tap_base = omap2_globals->tap;
 541
 542         if (cpu_is_omap34xx())
 543                 tap_prod_id = 0x0210;
 544         else
 545                 tap_prod_id = 0x0208;
 546 }