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 <plat/common.h>
  25 #include <plat/cpu.h>
  26
  27 #include <mach/id.h>
  28
  29 #include "control.h"
  30
  31 static struct omap_chip_id omap_chip;
  32 static unsigned int omap_revision;
  33
  34 u32 omap_features;
  35
  36 unsigned int omap_rev(void)
  37 {
  38         return omap_revision;
  39 }
  40 EXPORT_SYMBOL(omap_rev);
  41
  42 /**
  43  * omap_chip_is - test whether currently running OMAP matches a chip type
  44  * @oc: omap_chip_t to test against
  45  *
  46  * Test whether the currently-running OMAP chip matches the supplied
  47  * chip type 'oc'.  Returns 1 upon a match; 0 upon failure.
  48  */
  49 int omap_chip_is(struct omap_chip_id oci)
  50 {
  51         return (oci.oc & omap_chip.oc) ? 1 : 0;
  52 }
  53 EXPORT_SYMBOL(omap_chip_is);
  54
  55 int omap_type(void)
  56 {
  57         u32 val = 0;
  58
  59         if (cpu_is_omap24xx()) {
  60                 val = omap_ctrl_readl(OMAP24XX_CONTROL_STATUS);
  61         } else if (cpu_is_omap34xx()) {
  62                 val = omap_ctrl_readl(OMAP343X_CONTROL_STATUS);
  63         } else if (cpu_is_omap44xx()) {
  64                 val = omap_ctrl_readl(OMAP4_CTRL_MODULE_CORE_STATUS);
  65         } else {
  66                 pr_err("Cannot detect omap type!\n");
  67                 goto out;
  68         }
  69
  70         val &= OMAP2_DEVICETYPE_MASK;
  71         val >>= 8;
  72
  73 out:
  74         return val;
  75 }
  76 EXPORT_SYMBOL(omap_type);
  77
  78
  79 /*----------------------------------------------------------------------------*/
  80
  81 #define OMAP_TAP_IDCODE         0x0204
  82 #define OMAP_TAP_DIE_ID_0       0x0218
  83 #define OMAP_TAP_DIE_ID_1       0x021C
  84 #define OMAP_TAP_DIE_ID_2       0x0220
  85 #define OMAP_TAP_DIE_ID_3       0x0224
  86
  87 #define OMAP_TAP_DIE_ID_44XX_0  0x0200
  88 #define OMAP_TAP_DIE_ID_44XX_1  0x0208
  89 #define OMAP_TAP_DIE_ID_44XX_2  0x020c
  90 #define OMAP_TAP_DIE_ID_44XX_3  0x0210
  91
  92 #define read_tap_reg(reg)       __raw_readl(tap_base  + (reg))
  93
  94 struct omap_id {
  95         u16     hawkeye;        /* Silicon type (Hawkeye id) */
  96         u8      dev;            /* Device type from production_id reg */
  97         u32     type;           /* Combined type id copied to omap_revision */
  98 };
  99
 100 /* Register values to detect the OMAP version */
 101 static struct omap_id omap_ids[] __initdata = {
 102         { .hawkeye = 0xb5d9, .dev = 0x0, .type = 0x24200024 },
 103         { .hawkeye = 0xb5d9, .dev = 0x1, .type = 0x24201024 },
 104         { .hawkeye = 0xb5d9, .dev = 0x2, .type = 0x24202024 },
 105         { .hawkeye = 0xb5d9, .dev = 0x4, .type = 0x24220024 },
 106         { .hawkeye = 0xb5d9, .dev = 0x8, .type = 0x24230024 },
 107         { .hawkeye = 0xb68a, .dev = 0x0, .type = 0x24300024 },
 108 };
 109
 110 static void __iomem *tap_base;
 111 static u16 tap_prod_id;
 112
 113 void omap_get_die_id(struct omap_die_id *odi)
 114 {
 115         if (cpu_is_omap44xx()) {
 116                 odi->id_0 = read_tap_reg(OMAP_TAP_DIE_ID_44XX_0);
 117                 odi->id_1 = read_tap_reg(OMAP_TAP_DIE_ID_44XX_1);
 118                 odi->id_2 = read_tap_reg(OMAP_TAP_DIE_ID_44XX_2);
 119                 odi->id_3 = read_tap_reg(OMAP_TAP_DIE_ID_44XX_3);
 120
 121                 return;
 122         }
 123         odi->id_0 = read_tap_reg(OMAP_TAP_DIE_ID_0);
 124         odi->id_1 = read_tap_reg(OMAP_TAP_DIE_ID_1);
 125         odi->id_2 = read_tap_reg(OMAP_TAP_DIE_ID_2);
 126         odi->id_3 = read_tap_reg(OMAP_TAP_DIE_ID_3);
 127 }
 128
 129 static void __init omap24xx_check_revision(void)
 130 {
 131         int i, j;
 132         u32 idcode, prod_id;
 133         u16 hawkeye;
 134         u8  dev_type, rev;
 135         struct omap_die_id odi;
 136
 137         idcode = read_tap_reg(OMAP_TAP_IDCODE);
 138         prod_id = read_tap_reg(tap_prod_id);
 139         hawkeye = (idcode >> 12) & 0xffff;
 140         rev = (idcode >> 28) & 0x0f;
 141         dev_type = (prod_id >> 16) & 0x0f;
 142         omap_get_die_id(&odi);
 143
 144         pr_debug("OMAP_TAP_IDCODE 0x%08x REV %i HAWKEYE 0x%04x MANF %03x\n",
 145                  idcode, rev, hawkeye, (idcode >> 1) & 0x7ff);
 146         pr_debug("OMAP_TAP_DIE_ID_0: 0x%08x\n", odi.id_0);
 147         pr_debug("OMAP_TAP_DIE_ID_1: 0x%08x DEV_REV: %i\n",
 148                  odi.id_1, (odi.id_1 >> 28) & 0xf);
 149         pr_debug("OMAP_TAP_DIE_ID_2: 0x%08x\n", odi.id_2);
 150         pr_debug("OMAP_TAP_DIE_ID_3: 0x%08x\n", odi.id_3);
 151         pr_debug("OMAP_TAP_PROD_ID_0: 0x%08x DEV_TYPE: %i\n",
 152                  prod_id, dev_type);
 153
 154         /* Check hawkeye ids */
 155         for (i = 0; i < ARRAY_SIZE(omap_ids); i++) {
 156                 if (hawkeye == omap_ids[i].hawkeye)
 157                         break;
 158         }
 159
 160         if (i == ARRAY_SIZE(omap_ids)) {
 161                 printk(KERN_ERR "Unknown OMAP CPU id\n");
 162                 return;
 163         }
 164
 165         for (j = i; j < ARRAY_SIZE(omap_ids); j++) {
 166                 if (dev_type == omap_ids[j].dev)
 167                         break;
 168         }
 169
 170         if (j == ARRAY_SIZE(omap_ids)) {
 171                 printk(KERN_ERR "Unknown OMAP device type. "
 172                                 "Handling it as OMAP%04x\n",
 173                                 omap_ids[i].type >> 16);
 174                 j = i;
 175         }
 176
 177         pr_info("OMAP%04x", omap_rev() >> 16);
 178         if ((omap_rev() >> 8) & 0x0f)
 179                 pr_info("ES%x", (omap_rev() >> 12) & 0xf);
 180         pr_info("\n");
 181 }
 182
 183 #define OMAP3_CHECK_FEATURE(status,feat)                                \
 184         if (((status & OMAP3_ ##feat## _MASK)                           \
 185                 >> OMAP3_ ##feat## _SHIFT) != FEAT_ ##feat## _NONE) {   \
 186                 omap_features |= OMAP3_HAS_ ##feat;                     \
 187         }
 188
 189 static void __init omap3_check_features(void)
 190 {
 191         u32 status;
 192
 193         omap_features = 0;
 194
 195         status = omap_ctrl_readl(OMAP3_CONTROL_OMAP_STATUS);
 196
 197         OMAP3_CHECK_FEATURE(status, L2CACHE);
 198         OMAP3_CHECK_FEATURE(status, IVA);
 199         OMAP3_CHECK_FEATURE(status, SGX);
 200         OMAP3_CHECK_FEATURE(status, NEON);
 201         OMAP3_CHECK_FEATURE(status, ISP);
 202         if (cpu_is_omap3630())
 203                 omap_features |= OMAP3_HAS_192MHZ_CLK;
 204         if (!cpu_is_omap3505() && !cpu_is_omap3517())
 205                 omap_features |= OMAP3_HAS_IO_WAKEUP;
 206
 207         omap_features |= OMAP3_HAS_SDRC;
 208
 209         /*
 210          * TODO: Get additional info (where applicable)
 211          *       e.g. Size of L2 cache.
 212          */
 213 }
 214
 215 static void __init omap4_check_features(void)
 216 {
 217         u32 si_type;
 218
 219         if (cpu_is_omap443x())
 220                 omap_features |= OMAP4_HAS_MPU_1GHZ;
 221
 222
 223         if (cpu_is_omap446x()) {
 224                 si_type =
 225                         read_tap_reg(OMAP4_CTRL_MODULE_CORE_STD_FUSE_PROD_ID_1);
 226                 switch ((si_type & (3 << 16)) >> 16) {
 227                 case 2:
 228                         /* High performance device */
 229                         omap_features |= OMAP4_HAS_MPU_1_5GHZ;
 230                         break;
 231                 case 1:
 232                 default:
 233                         /* Standard device */
 234                         omap_features |= OMAP4_HAS_MPU_1_2GHZ;
 235                         break;
 236                 }
 237         }
 238 }
 239
 240 static void __init ti816x_check_features(void)
 241 {
 242         omap_features = OMAP3_HAS_NEON;
 243 }
 244
 245 static void __init omap3_check_revision(void)
 246 {
 247         u32 cpuid, idcode;
 248         u16 hawkeye;
 249         u8 rev;
 250
 251         omap_chip.oc = CHIP_IS_OMAP3430;
 252
 253         /*
 254          * We cannot access revision registers on ES1.0.
 255          * If the processor type is Cortex-A8 and the revision is 0x0
 256          * it means its Cortex r0p0 which is 3430 ES1.0.
 257          */
 258         cpuid = read_cpuid(CPUID_ID);
 259         if ((((cpuid >> 4) & 0xfff) == 0xc08) && ((cpuid & 0xf) == 0x0)) {
 260                 omap_revision = OMAP3430_REV_ES1_0;
 261                 omap_chip.oc |= CHIP_IS_OMAP3430ES1;
 262                 return;
 263         }
 264
 265         /*
 266          * Detection for 34xx ES2.0 and above can be done with just
 267          * hawkeye and rev. See TRM 1.5.2 Device Identification.
 268          * Note that rev does not map directly to our defined processor
 269          * revision numbers as ES1.0 uses value 0.
 270          */
 271         idcode = read_tap_reg(OMAP_TAP_IDCODE);
 272         hawkeye = (idcode >> 12) & 0xffff;
 273         rev = (idcode >> 28) & 0xff;
 274
 275         switch (hawkeye) {
 276         case 0xb7ae:
 277                 /* Handle 34xx/35xx devices */
 278                 switch (rev) {
 279                 case 0: /* Take care of early samples */
 280                 case 1:
 281                         omap_revision = OMAP3430_REV_ES2_0;
 282                         omap_chip.oc |= CHIP_IS_OMAP3430ES2;
 283                         break;
 284                 case 2:
 285                         omap_revision = OMAP3430_REV_ES2_1;
 286                         omap_chip.oc |= CHIP_IS_OMAP3430ES2;
 287                         break;
 288                 case 3:
 289                         omap_revision = OMAP3430_REV_ES3_0;
 290                         omap_chip.oc |= CHIP_IS_OMAP3430ES3_0;
 291                         break;
 292                 case 4:
 293                         omap_revision = OMAP3430_REV_ES3_1;
 294                         omap_chip.oc |= CHIP_IS_OMAP3430ES3_1;
 295                         break;
 296                 case 7:
 297                 /* FALLTHROUGH */
 298                 default:
 299                         /* Use the latest known revision as default */
 300                         omap_revision = OMAP3430_REV_ES3_1_2;
 301
 302                         /* REVISIT: Add CHIP_IS_OMAP3430ES3_1_2? */
 303                         omap_chip.oc |= CHIP_IS_OMAP3430ES3_1;
 304                 }
 305                 break;
 306         case 0xb868:
 307                 /* Handle OMAP35xx/AM35xx devices
 308                  *
 309                  * Set the device to be OMAP3505 here. Actual device
 310                  * is identified later based on the features.
 311                  *
 312                  * REVISIT: AM3505/AM3517 should have their own CHIP_IS
 313                  */
 314                 omap_revision = OMAP3505_REV(rev);
 315                 omap_chip.oc |= CHIP_IS_OMAP3430ES3_1;
 316                 break;
 317         case 0xb891:
 318                 /* Handle 36xx devices */
 319                 omap_chip.oc |= CHIP_IS_OMAP3630ES1;
 320
 321                 switch(rev) {
 322                 case 0: /* Take care of early samples */
 323                         omap_revision = OMAP3630_REV_ES1_0;
 324                         break;
 325                 case 1:
 326                         omap_revision = OMAP3630_REV_ES1_1;
 327                         omap_chip.oc |= CHIP_IS_OMAP3630ES1_1;
 328                         break;
 329                 case 2:
 330                 default:
 331                         omap_revision =  OMAP3630_REV_ES1_2;
 332                         omap_chip.oc |= CHIP_IS_OMAP3630ES1_2;
 333                 }
 334                 break;
 335         case 0xb81e:
 336                 omap_chip.oc = CHIP_IS_TI816X;
 337
 338                 switch (rev) {
 339                 case 0:
 340                         omap_revision = TI8168_REV_ES1_0;
 341                         break;
 342                 case 1:
 343                         omap_revision = TI8168_REV_ES1_1;
 344                         break;
 345                 default:
 346                         omap_revision =  TI8168_REV_ES1_1;
 347                 }
 348                 break;
 349         default:
 350                 /* Unknown default to latest silicon rev as default*/
 351                 omap_revision =  OMAP3630_REV_ES1_2;
 352                 omap_chip.oc |= CHIP_IS_OMAP3630ES1_2;
 353         }
 354 }
 355
 356 static void __init omap4_check_revision(void)
 357 {
 358         u32 idcode;
 359         u16 hawkeye;
 360         u8 rev;
 361
 362         /*
 363          * The IC rev detection is done with hawkeye and rev.
 364          * Note that rev does not map directly to defined processor
 365          * revision numbers as ES1.0 uses value 0.
 366          */
 367         idcode = read_tap_reg(OMAP_TAP_IDCODE);
 368         hawkeye = (idcode >> 12) & 0xffff;
 369         rev = (idcode >> 28) & 0xf;
 370
 371         /*
 372          * Few initial 4430 ES2.0 samples IDCODE is same as ES1.0
 373          * Use ARM register to detect the correct ES version
 374          */
 375         if (!rev && (hawkeye != 0xb94e)) {
 376                 idcode = read_cpuid(CPUID_ID);
 377                 rev = (idcode & 0xf) - 1;
 378         }
 379
 380         switch (hawkeye) {
 381         case 0xb852:
 382                 switch (rev) {
 383                 case 0:
 384                         omap_revision = OMAP4430_REV_ES1_0;
 385                         omap_chip.oc |= CHIP_IS_OMAP4430ES1;
 386                         break;
 387                 case 1:
 388                 default:
 389                         omap_revision = OMAP4430_REV_ES2_0;
 390                         omap_chip.oc |= CHIP_IS_OMAP4430ES2;
 391                 }
 392                 break;
 393         case 0xb95c:
 394                 switch (rev) {
 395                 case 3:
 396                         omap_revision = OMAP4430_REV_ES2_1;
 397                         omap_chip.oc |= CHIP_IS_OMAP4430ES2_1;
 398                         break;
 399                 case 4:
 400                 default:
 401                         omap_revision = OMAP4430_REV_ES2_2;
 402                         omap_chip.oc |= CHIP_IS_OMAP4430ES2_2;
 403                 }
 404                 break;
 405         case 0xb94e:
 406                 switch (rev) {
 407                 case 0:
 408                 default:
 409                         omap_revision = OMAP4460_REV_ES1_0;
 410                         omap_chip.oc |= CHIP_IS_OMAP4460ES1_0;
 411                         break;
 412                 }
 413                 break;
 414         default:
 415                 /* Unknown default to latest silicon rev as default */
 416                 omap_revision = OMAP4430_REV_ES2_2;
 417                 omap_chip.oc |= CHIP_IS_OMAP4430ES2_2;
 418         }
 419
 420         pr_info("OMAP%04x ES%d.%d\n", omap_rev() >> 16,
 421                 ((omap_rev() >> 12) & 0xf), ((omap_rev() >> 8) & 0xf));
 422 }
 423
 424 #define OMAP3_SHOW_FEATURE(feat)                \
 425         if (omap3_has_ ##feat())                \
 426                 printk(#feat" ");
 427
 428 static void __init omap3_cpuinfo(void)
 429 {
 430         u8 rev = GET_OMAP_REVISION();
 431         char cpu_name[16], cpu_rev[16];
 432
 433         /* OMAP3430 and OMAP3530 are assumed to be same.
 434          *
 435          * OMAP3525, OMAP3515 and OMAP3503 can be detected only based
 436          * on available features. Upon detection, update the CPU id
 437          * and CPU class bits.
 438          */
 439         if (cpu_is_omap3630()) {
 440                 strcpy(cpu_name, "OMAP3630");
 441         } else if (cpu_is_omap3505()) {
 442                 /*
 443                  * AM35xx devices
 444                  */
 445                 if (omap3_has_sgx()) {
 446                         omap_revision = OMAP3517_REV(rev);
 447                         strcpy(cpu_name, "AM3517");
 448                 } else {
 449                         /* Already set in omap3_check_revision() */
 450                         strcpy(cpu_name, "AM3505");
 451                 }
 452         } else if (cpu_is_ti816x()) {
 453                 strcpy(cpu_name, "TI816X");
 454         } else if (omap3_has_iva() && omap3_has_sgx()) {
 455                 /* OMAP3430, OMAP3525, OMAP3515, OMAP3503 devices */
 456                 strcpy(cpu_name, "OMAP3430/3530");
 457         } else if (omap3_has_iva()) {
 458                 omap_revision = OMAP3525_REV(rev);
 459                 strcpy(cpu_name, "OMAP3525");
 460         } else if (omap3_has_sgx()) {
 461                 omap_revision = OMAP3515_REV(rev);
 462                 strcpy(cpu_name, "OMAP3515");
 463         } else {
 464                 omap_revision = OMAP3503_REV(rev);
 465                 strcpy(cpu_name, "OMAP3503");
 466         }
 467
 468         if (cpu_is_omap3630() || cpu_is_ti816x()) {
 469                 switch (rev) {
 470                 case OMAP_REVBITS_00:
 471                         strcpy(cpu_rev, "1.0");
 472                         break;
 473                 case OMAP_REVBITS_01:
 474                         strcpy(cpu_rev, "1.1");
 475                         break;
 476                 case OMAP_REVBITS_02:
 477                         /* FALLTHROUGH */
 478                 default:
 479                         /* Use the latest known revision as default */
 480                         strcpy(cpu_rev, "1.2");
 481                 }
 482         } else if (cpu_is_omap3505() || cpu_is_omap3517()) {
 483                 switch (rev) {
 484                 case OMAP_REVBITS_00:
 485                         strcpy(cpu_rev, "1.0");
 486                         break;
 487                 case OMAP_REVBITS_01:
 488                         /* FALLTHROUGH */
 489                 default:
 490                         /* Use the latest known revision as default */
 491                         strcpy(cpu_rev, "1.1");
 492                 }
 493         } else {
 494                 switch (rev) {
 495                 case OMAP_REVBITS_00:
 496                         strcpy(cpu_rev, "1.0");
 497                         break;
 498                 case OMAP_REVBITS_01:
 499                         strcpy(cpu_rev, "2.0");
 500                         break;
 501                 case OMAP_REVBITS_02:
 502                         strcpy(cpu_rev, "2.1");
 503                         break;
 504                 case OMAP_REVBITS_03:
 505                         strcpy(cpu_rev, "3.0");
 506                         break;
 507                 case OMAP_REVBITS_04:
 508                         strcpy(cpu_rev, "3.1");
 509                         break;
 510                 case OMAP_REVBITS_05:
 511                         /* FALLTHROUGH */
 512                 default:
 513                         /* Use the latest known revision as default */
 514                         strcpy(cpu_rev, "3.1.2");
 515                 }
 516         }
 517
 518         /* Print verbose information */
 519         pr_info("%s ES%s (", cpu_name, cpu_rev);
 520
 521         OMAP3_SHOW_FEATURE(l2cache);
 522         OMAP3_SHOW_FEATURE(iva);
 523         OMAP3_SHOW_FEATURE(sgx);
 524         OMAP3_SHOW_FEATURE(neon);
 525         OMAP3_SHOW_FEATURE(isp);
 526         OMAP3_SHOW_FEATURE(192mhz_clk);
 527
 528         printk(")\n");
 529 }
 530
 531 /*
 532  * Try to detect the exact revision of the omap we're running on
 533  */
 534 void __init omap2_check_revision(void)
 535 {
 536         /*
 537          * At this point we have an idea about the processor revision set
 538          * earlier with omap2_set_globals_tap().
 539          */
 540         if (cpu_is_omap24xx()) {
 541                 omap24xx_check_revision();
 542         } else if (cpu_is_omap34xx()) {
 543                 omap3_check_revision();
 544
 545                 /* TI816X doesn't have feature register */
 546                 if (!cpu_is_ti816x())
 547                         omap3_check_features();
 548                 else
 549                         ti816x_check_features();
 550
 551                 omap3_cpuinfo();
 552                 return;
 553         } else if (cpu_is_omap44xx()) {
 554                 omap4_check_revision();
 555                 omap4_check_features();
 556                 return;
 557         } else {
 558                 pr_err("OMAP revision unknown, please fix!\n");
 559         }
 560
 561         /*
 562          * OK, now we know the exact revision. Initialize omap_chip bits
 563          * for powerdowmain and clockdomain code.
 564          */
 565         if (cpu_is_omap243x()) {
 566                 /* Currently only supports 2430ES2.1 and 2430-all */
 567                 omap_chip.oc |= CHIP_IS_OMAP2430;
 568                 return;
 569         } else if (cpu_is_omap242x()) {
 570                 /* Currently only supports 2420ES2.1.1 and 2420-all */
 571                 omap_chip.oc |= CHIP_IS_OMAP2420;
 572                 return;
 573         }
 574
 575         pr_err("Uninitialized omap_chip, please fix!\n");
 576 }
 577
 578 /*
 579  * Set up things for map_io and processor detection later on. Gets called
 580  * pretty much first thing from board init. For multi-omap, this gets
 581  * cpu_is_omapxxxx() working accurately enough for map_io. Then we'll try to
 582  * detect the exact revision later on in omap2_detect_revision() once map_io
 583  * is done.
 584  */
 585 void __init omap2_set_globals_tap(struct omap_globals *omap2_globals)
 586 {
 587         omap_revision = omap2_globals->class;
 588         tap_base = omap2_globals->tap;
 589
 590         if (cpu_is_omap34xx())
 591                 tap_prod_id = 0x0210;
 592         else
 593                 tap_prod_id = 0x0208;
 594 }