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
  26 #include "id.h"
  27
  28 #include "soc.h"
  29 #include "control.h"
  30
  31 #define OMAP4_SILICON_TYPE_STANDARD             0x01
  32 #define OMAP4_SILICON_TYPE_PERFORMANCE          0x02
  33
  34 static unsigned int omap_revision;
  35 static const char *cpu_rev;
  36 u32 omap_features;
  37
  38 unsigned int omap_rev(void)
  39 {
  40         return omap_revision;
  41 }
  42 EXPORT_SYMBOL(omap_rev);
  43
  44 int omap_type(void)
  45 {
  46         u32 val = 0;
  47
  48         if (cpu_is_omap24xx()) {
  49                 val = omap_ctrl_readl(OMAP24XX_CONTROL_STATUS);
  50         } else if (soc_is_am33xx()) {
  51                 val = omap_ctrl_readl(AM33XX_CONTROL_STATUS);
  52         } else if (cpu_is_omap34xx()) {
  53                 val = omap_ctrl_readl(OMAP343X_CONTROL_STATUS);
  54         } else if (cpu_is_omap44xx()) {
  55                 val = omap_ctrl_readl(OMAP4_CTRL_MODULE_CORE_STATUS);
  56         } else if (soc_is_omap54xx()) {
  57                 val = omap_ctrl_readl(OMAP5XXX_CONTROL_STATUS);
  58                 val &= OMAP5_DEVICETYPE_MASK;
  59                 val >>= 6;
  60                 goto out;
  61         } else {
  62                 pr_err("Cannot detect omap type!\n");
  63                 goto out;
  64         }
  65
  66         val &= OMAP2_DEVICETYPE_MASK;
  67         val >>= 8;
  68
  69 out:
  70         return val;
  71 }
  72 EXPORT_SYMBOL(omap_type);
  73
  74
  75 /*----------------------------------------------------------------------------*/
  76
  77 #define OMAP_TAP_IDCODE         0x0204
  78 #define OMAP_TAP_DIE_ID_0       0x0218
  79 #define OMAP_TAP_DIE_ID_1       0x021C
  80 #define OMAP_TAP_DIE_ID_2       0x0220
  81 #define OMAP_TAP_DIE_ID_3       0x0224
  82
  83 #define OMAP_TAP_DIE_ID_44XX_0  0x0200
  84 #define OMAP_TAP_DIE_ID_44XX_1  0x0208
  85 #define OMAP_TAP_DIE_ID_44XX_2  0x020c
  86 #define OMAP_TAP_DIE_ID_44XX_3  0x0210
  87
  88 #define read_tap_reg(reg)       __raw_readl(tap_base  + (reg))
  89
  90 struct omap_id {
  91         u16     hawkeye;        /* Silicon type (Hawkeye id) */
  92         u8      dev;            /* Device type from production_id reg */
  93         u32     type;           /* Combined type id copied to omap_revision */
  94 };
  95
  96 /* Register values to detect the OMAP version */
  97 static struct omap_id omap_ids[] __initdata = {
  98         { .hawkeye = 0xb5d9, .dev = 0x0, .type = 0x24200024 },
  99         { .hawkeye = 0xb5d9, .dev = 0x1, .type = 0x24201024 },
 100         { .hawkeye = 0xb5d9, .dev = 0x2, .type = 0x24202024 },
 101         { .hawkeye = 0xb5d9, .dev = 0x4, .type = 0x24220024 },
 102         { .hawkeye = 0xb5d9, .dev = 0x8, .type = 0x24230024 },
 103         { .hawkeye = 0xb68a, .dev = 0x0, .type = 0x24300024 },
 104 };
 105
 106 static void __iomem *tap_base;
 107 static u16 tap_prod_id;
 108
 109 void omap_get_die_id(struct omap_die_id *odi)
 110 {
 111         if (cpu_is_omap44xx() || soc_is_omap54xx()) {
 112                 odi->id_0 = read_tap_reg(OMAP_TAP_DIE_ID_44XX_0);
 113                 odi->id_1 = read_tap_reg(OMAP_TAP_DIE_ID_44XX_1);
 114                 odi->id_2 = read_tap_reg(OMAP_TAP_DIE_ID_44XX_2);
 115                 odi->id_3 = read_tap_reg(OMAP_TAP_DIE_ID_44XX_3);
 116
 117                 return;
 118         }
 119         odi->id_0 = read_tap_reg(OMAP_TAP_DIE_ID_0);
 120         odi->id_1 = read_tap_reg(OMAP_TAP_DIE_ID_1);
 121         odi->id_2 = read_tap_reg(OMAP_TAP_DIE_ID_2);
 122         odi->id_3 = read_tap_reg(OMAP_TAP_DIE_ID_3);
 123 }
 124
 125 void __init omap2xxx_check_revision(void)
 126 {
 127         int i, j;
 128         u32 idcode, prod_id;
 129         u16 hawkeye;
 130         u8  dev_type, rev;
 131         struct omap_die_id odi;
 132
 133         idcode = read_tap_reg(OMAP_TAP_IDCODE);
 134         prod_id = read_tap_reg(tap_prod_id);
 135         hawkeye = (idcode >> 12) & 0xffff;
 136         rev = (idcode >> 28) & 0x0f;
 137         dev_type = (prod_id >> 16) & 0x0f;
 138         omap_get_die_id(&odi);
 139
 140         pr_debug("OMAP_TAP_IDCODE 0x%08x REV %i HAWKEYE 0x%04x MANF %03x\n",
 141                  idcode, rev, hawkeye, (idcode >> 1) & 0x7ff);
 142         pr_debug("OMAP_TAP_DIE_ID_0: 0x%08x\n", odi.id_0);
 143         pr_debug("OMAP_TAP_DIE_ID_1: 0x%08x DEV_REV: %i\n",
 144                  odi.id_1, (odi.id_1 >> 28) & 0xf);
 145         pr_debug("OMAP_TAP_DIE_ID_2: 0x%08x\n", odi.id_2);
 146         pr_debug("OMAP_TAP_DIE_ID_3: 0x%08x\n", odi.id_3);
 147         pr_debug("OMAP_TAP_PROD_ID_0: 0x%08x DEV_TYPE: %i\n",
 148                  prod_id, dev_type);
 149
 150         /* Check hawkeye ids */
 151         for (i = 0; i < ARRAY_SIZE(omap_ids); i++) {
 152                 if (hawkeye == omap_ids[i].hawkeye)
 153                         break;
 154         }
 155
 156         if (i == ARRAY_SIZE(omap_ids)) {
 157                 printk(KERN_ERR "Unknown OMAP CPU id\n");
 158                 return;
 159         }
 160
 161         for (j = i; j < ARRAY_SIZE(omap_ids); j++) {
 162                 if (dev_type == omap_ids[j].dev)
 163                         break;
 164         }
 165
 166         if (j == ARRAY_SIZE(omap_ids)) {
 167                 pr_err("Unknown OMAP device type. Handling it as OMAP%04x\n",
 168                        omap_ids[i].type >> 16);
 169                 j = i;
 170         }
 171
 172         pr_info("OMAP%04x", omap_rev() >> 16);
 173         if ((omap_rev() >> 8) & 0x0f)
 174                 pr_info("ES%x", (omap_rev() >> 12) & 0xf);
 175         pr_info("\n");
 176 }
 177
 178 #define OMAP3_SHOW_FEATURE(feat)                \
 179         if (omap3_has_ ##feat())                \
 180                 printk(#feat" ");
 181
 182 static void __init omap3_cpuinfo(void)
 183 {
 184         const char *cpu_name;
 185
 186         /*
 187          * OMAP3430 and OMAP3530 are assumed to be same.
 188          *
 189          * OMAP3525, OMAP3515 and OMAP3503 can be detected only based
 190          * on available features. Upon detection, update the CPU id
 191          * and CPU class bits.
 192          */
 193         if (cpu_is_omap3630()) {
 194                 cpu_name = "OMAP3630";
 195         } else if (soc_is_am35xx()) {
 196                 cpu_name = (omap3_has_sgx()) ? "AM3517" : "AM3505";
 197         } else if (cpu_is_ti816x()) {
 198                 cpu_name = "TI816X";
 199         } else if (soc_is_am335x()) {
 200                 cpu_name =  "AM335X";
 201         } else if (cpu_is_ti814x()) {
 202                 cpu_name = "TI814X";
 203         } else if (omap3_has_iva() && omap3_has_sgx()) {
 204                 /* OMAP3430, OMAP3525, OMAP3515, OMAP3503 devices */
 205                 cpu_name = "OMAP3430/3530";
 206         } else if (omap3_has_iva()) {
 207                 cpu_name = "OMAP3525";
 208         } else if (omap3_has_sgx()) {
 209                 cpu_name = "OMAP3515";
 210         } else {
 211                 cpu_name = "OMAP3503";
 212         }
 213
 214         /* Print verbose information */
 215         pr_info("%s ES%s (", cpu_name, cpu_rev);
 216
 217         OMAP3_SHOW_FEATURE(l2cache);
 218         OMAP3_SHOW_FEATURE(iva);
 219         OMAP3_SHOW_FEATURE(sgx);
 220         OMAP3_SHOW_FEATURE(neon);
 221         OMAP3_SHOW_FEATURE(isp);
 222         OMAP3_SHOW_FEATURE(192mhz_clk);
 223
 224         printk(")\n");
 225 }
 226
 227 #define OMAP3_CHECK_FEATURE(status,feat)                                \
 228         if (((status & OMAP3_ ##feat## _MASK)                           \
 229                 >> OMAP3_ ##feat## _SHIFT) != FEAT_ ##feat## _NONE) {   \
 230                 omap_features |= OMAP3_HAS_ ##feat;                     \
 231         }
 232
 233 void __init omap3xxx_check_features(void)
 234 {
 235         u32 status;
 236
 237         omap_features = 0;
 238
 239         status = omap_ctrl_readl(OMAP3_CONTROL_OMAP_STATUS);
 240
 241         OMAP3_CHECK_FEATURE(status, L2CACHE);
 242         OMAP3_CHECK_FEATURE(status, IVA);
 243         OMAP3_CHECK_FEATURE(status, SGX);
 244         OMAP3_CHECK_FEATURE(status, NEON);
 245         OMAP3_CHECK_FEATURE(status, ISP);
 246         if (cpu_is_omap3630())
 247                 omap_features |= OMAP3_HAS_192MHZ_CLK;
 248         if (cpu_is_omap3430() || cpu_is_omap3630())
 249                 omap_features |= OMAP3_HAS_IO_WAKEUP;
 250         if (cpu_is_omap3630() || omap_rev() == OMAP3430_REV_ES3_1 ||
 251             omap_rev() == OMAP3430_REV_ES3_1_2)
 252                 omap_features |= OMAP3_HAS_IO_CHAIN_CTRL;
 253
 254         omap_features |= OMAP3_HAS_SDRC;
 255
 256         /*
 257          * am35x fixups:
 258          * - The am35x Chip ID register has bits 12, 7:5, and 3:2 marked as
 259          *   reserved and therefore return 0 when read.  Unfortunately,
 260          *   OMAP3_CHECK_FEATURE() will interpret some of those zeroes to
 261          *   mean that a feature is present even though it isn't so clear
 262          *   the incorrectly set feature bits.
 263          */
 264         if (soc_is_am35xx())
 265                 omap_features &= ~(OMAP3_HAS_IVA | OMAP3_HAS_ISP);
 266
 267         /*
 268          * TODO: Get additional info (where applicable)
 269          *       e.g. Size of L2 cache.
 270          */
 271
 272         omap3_cpuinfo();
 273 }
 274
 275 void __init omap4xxx_check_features(void)
 276 {
 277         u32 si_type;
 278
 279         si_type =
 280         (read_tap_reg(OMAP4_CTRL_MODULE_CORE_STD_FUSE_PROD_ID_1) >> 16) & 0x03;
 281
 282         if (si_type == OMAP4_SILICON_TYPE_PERFORMANCE)
 283                 omap_features = OMAP4_HAS_PERF_SILICON;
 284 }
 285
 286 void __init ti81xx_check_features(void)
 287 {
 288         omap_features = OMAP3_HAS_NEON;
 289         omap3_cpuinfo();
 290 }
 291
 292 void __init omap3xxx_check_revision(void)
 293 {
 294         u32 cpuid, idcode;
 295         u16 hawkeye;
 296         u8 rev;
 297
 298         /*
 299          * We cannot access revision registers on ES1.0.
 300          * If the processor type is Cortex-A8 and the revision is 0x0
 301          * it means its Cortex r0p0 which is 3430 ES1.0.
 302          */
 303         cpuid = read_cpuid(CPUID_ID);
 304         if ((((cpuid >> 4) & 0xfff) == 0xc08) && ((cpuid & 0xf) == 0x0)) {
 305                 omap_revision = OMAP3430_REV_ES1_0;
 306                 cpu_rev = "1.0";
 307                 return;
 308         }
 309
 310         /*
 311          * Detection for 34xx ES2.0 and above can be done with just
 312          * hawkeye and rev. See TRM 1.5.2 Device Identification.
 313          * Note that rev does not map directly to our defined processor
 314          * revision numbers as ES1.0 uses value 0.
 315          */
 316         idcode = read_tap_reg(OMAP_TAP_IDCODE);
 317         hawkeye = (idcode >> 12) & 0xffff;
 318         rev = (idcode >> 28) & 0xff;
 319
 320         switch (hawkeye) {
 321         case 0xb7ae:
 322                 /* Handle 34xx/35xx devices */
 323                 switch (rev) {
 324                 case 0: /* Take care of early samples */
 325                 case 1:
 326                         omap_revision = OMAP3430_REV_ES2_0;
 327                         cpu_rev = "2.0";
 328                         break;
 329                 case 2:
 330                         omap_revision = OMAP3430_REV_ES2_1;
 331                         cpu_rev = "2.1";
 332                         break;
 333                 case 3:
 334                         omap_revision = OMAP3430_REV_ES3_0;
 335                         cpu_rev = "3.0";
 336                         break;
 337                 case 4:
 338                         omap_revision = OMAP3430_REV_ES3_1;
 339                         cpu_rev = "3.1";
 340                         break;
 341                 case 7:
 342                 /* FALLTHROUGH */
 343                 default:
 344                         /* Use the latest known revision as default */
 345                         omap_revision = OMAP3430_REV_ES3_1_2;
 346                         cpu_rev = "3.1.2";
 347                 }
 348                 break;
 349         case 0xb868:
 350                 /*
 351                  * Handle OMAP/AM 3505/3517 devices
 352                  *
 353                  * Set the device to be OMAP3517 here. Actual device
 354                  * is identified later based on the features.
 355                  */
 356                 switch (rev) {
 357                 case 0:
 358                         omap_revision = AM35XX_REV_ES1_0;
 359                         cpu_rev = "1.0";
 360                         break;
 361                 case 1:
 362                 /* FALLTHROUGH */
 363                 default:
 364                         omap_revision = AM35XX_REV_ES1_1;
 365                         cpu_rev = "1.1";
 366                 }
 367                 break;
 368         case 0xb891:
 369                 /* Handle 36xx devices */
 370
 371                 switch(rev) {
 372                 case 0: /* Take care of early samples */
 373                         omap_revision = OMAP3630_REV_ES1_0;
 374                         cpu_rev = "1.0";
 375                         break;
 376                 case 1:
 377                         omap_revision = OMAP3630_REV_ES1_1;
 378                         cpu_rev = "1.1";
 379                         break;
 380                 case 2:
 381                 /* FALLTHROUGH */
 382                 default:
 383                         omap_revision = OMAP3630_REV_ES1_2;
 384                         cpu_rev = "1.2";
 385                 }
 386                 break;
 387         case 0xb81e:
 388                 switch (rev) {
 389                 case 0:
 390                         omap_revision = TI8168_REV_ES1_0;
 391                         cpu_rev = "1.0";
 392                         break;
 393                 case 1:
 394                 /* FALLTHROUGH */
 395                 default:
 396                         omap_revision = TI8168_REV_ES1_1;
 397                         cpu_rev = "1.1";
 398                         break;
 399                 }
 400                 break;
 401         case 0xb944:
 402                 omap_revision = AM335X_REV_ES1_0;
 403                 cpu_rev = "1.0";
 404                 break;
 405         case 0xb8f2:
 406                 switch (rev) {
 407                 case 0:
 408                 /* FALLTHROUGH */
 409                 case 1:
 410                         omap_revision = TI8148_REV_ES1_0;
 411                         cpu_rev = "1.0";
 412                         break;
 413                 case 2:
 414                         omap_revision = TI8148_REV_ES2_0;
 415                         cpu_rev = "2.0";
 416                         break;
 417                 case 3:
 418                 /* FALLTHROUGH */
 419                 default:
 420                         omap_revision = TI8148_REV_ES2_1;
 421                         cpu_rev = "2.1";
 422                         break;
 423                 }
 424                 break;
 425         default:
 426                 /* Unknown default to latest silicon rev as default */
 427                 omap_revision = OMAP3630_REV_ES1_2;
 428                 cpu_rev = "1.2";
 429                 pr_warn("Warning: unknown chip type; assuming OMAP3630ES1.2\n");
 430         }
 431 }
 432
 433 void __init omap4xxx_check_revision(void)
 434 {
 435         u32 idcode;
 436         u16 hawkeye;
 437         u8 rev;
 438
 439         /*
 440          * The IC rev detection is done with hawkeye and rev.
 441          * Note that rev does not map directly to defined processor
 442          * revision numbers as ES1.0 uses value 0.
 443          */
 444         idcode = read_tap_reg(OMAP_TAP_IDCODE);
 445         hawkeye = (idcode >> 12) & 0xffff;
 446         rev = (idcode >> 28) & 0xf;
 447
 448         /*
 449          * Few initial 4430 ES2.0 samples IDCODE is same as ES1.0
 450          * Use ARM register to detect the correct ES version
 451          */
 452         if (!rev && (hawkeye != 0xb94e) && (hawkeye != 0xb975)) {
 453                 idcode = read_cpuid(CPUID_ID);
 454                 rev = (idcode & 0xf) - 1;
 455         }
 456
 457         switch (hawkeye) {
 458         case 0xb852:
 459                 switch (rev) {
 460                 case 0:
 461                         omap_revision = OMAP4430_REV_ES1_0;
 462                         break;
 463                 case 1:
 464                 default:
 465                         omap_revision = OMAP4430_REV_ES2_0;
 466                 }
 467                 break;
 468         case 0xb95c:
 469                 switch (rev) {
 470                 case 3:
 471                         omap_revision = OMAP4430_REV_ES2_1;
 472                         break;
 473                 case 4:
 474                         omap_revision = OMAP4430_REV_ES2_2;
 475                         break;
 476                 case 6:
 477                 default:
 478                         omap_revision = OMAP4430_REV_ES2_3;
 479                 }
 480                 break;
 481         case 0xb94e:
 482                 switch (rev) {
 483                 case 0:
 484                         omap_revision = OMAP4460_REV_ES1_0;
 485                         break;
 486                 case 2:
 487                 default:
 488                         omap_revision = OMAP4460_REV_ES1_1;
 489                         break;
 490                 }
 491                 break;
 492         case 0xb975:
 493                 switch (rev) {
 494                 case 0:
 495                 default:
 496                         omap_revision = OMAP4470_REV_ES1_0;
 497                         break;
 498                 }
 499                 break;
 500         default:
 501                 /* Unknown default to latest silicon rev as default */
 502                 omap_revision = OMAP4430_REV_ES2_3;
 503         }
 504
 505         pr_info("OMAP%04x ES%d.%d\n", omap_rev() >> 16,
 506                 ((omap_rev() >> 12) & 0xf), ((omap_rev() >> 8) & 0xf));
 507 }
 508
 509 void __init omap5xxx_check_revision(void)
 510 {
 511         u32 idcode;
 512         u16 hawkeye;
 513         u8 rev;
 514
 515         idcode = read_tap_reg(OMAP_TAP_IDCODE);
 516         hawkeye = (idcode >> 12) & 0xffff;
 517         rev = (idcode >> 28) & 0xff;
 518         switch (hawkeye) {
 519         case 0xb942:
 520                 switch (rev) {
 521                 case 0:
 522                 default:
 523                         omap_revision = OMAP5430_REV_ES1_0;
 524                 }
 525                 break;
 526
 527         case 0xb998:
 528                 switch (rev) {
 529                 case 0:
 530                 default:
 531                         omap_revision = OMAP5432_REV_ES1_0;
 532                 }
 533                 break;
 534
 535         default:
 536                 /* Unknown default to latest silicon rev as default*/
 537                 omap_revision = OMAP5430_REV_ES1_0;
 538         }
 539
 540         pr_info("OMAP%04x ES%d.0\n",
 541                         omap_rev() >> 16, ((omap_rev() >> 12) & 0xf));
 542 }
 543
 544 /*
 545  * Set up things for map_io and processor detection later on. Gets called
 546  * pretty much first thing from board init. For multi-omap, this gets
 547  * cpu_is_omapxxxx() working accurately enough for map_io. Then we'll try to
 548  * detect the exact revision later on in omap2_detect_revision() once map_io
 549  * is done.
 550  */
 551 void __init omap2_set_globals_tap(u32 class, void __iomem *tap)
 552 {
 553         omap_revision = class;
 554         tap_base = tap;
 555
 556         /* XXX What is this intended to do? */
 557         if (cpu_is_omap34xx())
 558                 tap_prod_id = 0x0210;
 559         else
 560                 tap_prod_id = 0x0208;
 561 }