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 #include <linux/random.h>
  22 #include <linux/slab.h>
  23
  24 #ifdef CONFIG_SOC_BUS
  25 #include <linux/sys_soc.h>
  26 #endif
  27
  28 #include <asm/cputype.h>
  29
  30 #include "common.h"
  31
  32 #include "id.h"
  33
  34 #include "soc.h"
  35 #include "control.h"
  36
  37 #define OMAP4_SILICON_TYPE_STANDARD             0x01
  38 #define OMAP4_SILICON_TYPE_PERFORMANCE          0x02
  39
  40 #define OMAP_SOC_MAX_NAME_LENGTH                16
  41
  42 static unsigned int omap_revision;
  43 static char soc_name[OMAP_SOC_MAX_NAME_LENGTH];
  44 static char soc_rev[OMAP_SOC_MAX_NAME_LENGTH];
  45 u32 omap_features;
  46
  47 unsigned int omap_rev(void)
  48 {
  49         return omap_revision;
  50 }
  51 EXPORT_SYMBOL(omap_rev);
  52
  53 int omap_type(void)
  54 {
  55         u32 val = 0;
  56
  57         if (cpu_is_omap24xx()) {
  58                 val = omap_ctrl_readl(OMAP24XX_CONTROL_STATUS);
  59         } else if (cpu_is_ti81xx()) {
  60                 val = omap_ctrl_readl(TI81XX_CONTROL_STATUS);
  61         } else if (soc_is_am33xx() || soc_is_am43xx()) {
  62                 val = omap_ctrl_readl(AM33XX_CONTROL_STATUS);
  63         } else if (cpu_is_omap34xx()) {
  64                 val = omap_ctrl_readl(OMAP343X_CONTROL_STATUS);
  65         } else if (cpu_is_omap44xx()) {
  66                 val = omap_ctrl_readl(OMAP4_CTRL_MODULE_CORE_STATUS);
  67         } else if (soc_is_omap54xx() || soc_is_dra7xx()) {
  68                 val = omap_ctrl_readl(OMAP5XXX_CONTROL_STATUS);
  69                 val &= OMAP5_DEVICETYPE_MASK;
  70                 val >>= 6;
  71                 goto out;
  72         } else {
  73                 pr_err("Cannot detect omap type!\n");
  74                 goto out;
  75         }
  76
  77         val &= OMAP2_DEVICETYPE_MASK;
  78         val >>= 8;
  79
  80 out:
  81         return val;
  82 }
  83 EXPORT_SYMBOL(omap_type);
  84
  85
  86 /*----------------------------------------------------------------------------*/
  87
  88 #define OMAP_TAP_IDCODE         0x0204
  89 #define OMAP_TAP_DIE_ID_0       0x0218
  90 #define OMAP_TAP_DIE_ID_1       0x021C
  91 #define OMAP_TAP_DIE_ID_2       0x0220
  92 #define OMAP_TAP_DIE_ID_3       0x0224
  93
  94 #define OMAP_TAP_DIE_ID_44XX_0  0x0200
  95 #define OMAP_TAP_DIE_ID_44XX_1  0x0208
  96 #define OMAP_TAP_DIE_ID_44XX_2  0x020c
  97 #define OMAP_TAP_DIE_ID_44XX_3  0x0210
  98
  99 #define read_tap_reg(reg)       readl_relaxed(tap_base  + (reg))
 100
 101 struct omap_id {
 102         u16     hawkeye;        /* Silicon type (Hawkeye id) */
 103         u8      dev;            /* Device type from production_id reg */
 104         u32     type;           /* Combined type id copied to omap_revision */
 105 };
 106
 107 /* Register values to detect the OMAP version */
 108 static struct omap_id omap_ids[] __initdata = {
 109         { .hawkeye = 0xb5d9, .dev = 0x0, .type = 0x24200024 },
 110         { .hawkeye = 0xb5d9, .dev = 0x1, .type = 0x24201024 },
 111         { .hawkeye = 0xb5d9, .dev = 0x2, .type = 0x24202024 },
 112         { .hawkeye = 0xb5d9, .dev = 0x4, .type = 0x24220024 },
 113         { .hawkeye = 0xb5d9, .dev = 0x8, .type = 0x24230024 },
 114         { .hawkeye = 0xb68a, .dev = 0x0, .type = 0x24300024 },
 115 };
 116
 117 static void __iomem *tap_base;
 118 static u16 tap_prod_id;
 119
 120 void omap_get_die_id(struct omap_die_id *odi)
 121 {
 122         if (cpu_is_omap44xx() || soc_is_omap54xx() || soc_is_dra7xx()) {
 123                 odi->id_0 = read_tap_reg(OMAP_TAP_DIE_ID_44XX_0);
 124                 odi->id_1 = read_tap_reg(OMAP_TAP_DIE_ID_44XX_1);
 125                 odi->id_2 = read_tap_reg(OMAP_TAP_DIE_ID_44XX_2);
 126                 odi->id_3 = read_tap_reg(OMAP_TAP_DIE_ID_44XX_3);
 127
 128                 return;
 129         }
 130         odi->id_0 = read_tap_reg(OMAP_TAP_DIE_ID_0);
 131         odi->id_1 = read_tap_reg(OMAP_TAP_DIE_ID_1);
 132         odi->id_2 = read_tap_reg(OMAP_TAP_DIE_ID_2);
 133         odi->id_3 = read_tap_reg(OMAP_TAP_DIE_ID_3);
 134 }
 135
 136 static int __init omap_feed_randpool(void)
 137 {
 138         struct omap_die_id odi;
 139
 140         /* Throw the die ID into the entropy pool at boot */
 141         omap_get_die_id(&odi);
 142         add_device_randomness(&odi, sizeof(odi));
 143         return 0;
 144 }
 145 omap_device_initcall(omap_feed_randpool);
 146
 147 void __init omap2xxx_check_revision(void)
 148 {
 149         int i, j;
 150         u32 idcode, prod_id;
 151         u16 hawkeye;
 152         u8  dev_type, rev;
 153         struct omap_die_id odi;
 154
 155         idcode = read_tap_reg(OMAP_TAP_IDCODE);
 156         prod_id = read_tap_reg(tap_prod_id);
 157         hawkeye = (idcode >> 12) & 0xffff;
 158         rev = (idcode >> 28) & 0x0f;
 159         dev_type = (prod_id >> 16) & 0x0f;
 160         omap_get_die_id(&odi);
 161
 162         pr_debug("OMAP_TAP_IDCODE 0x%08x REV %i HAWKEYE 0x%04x MANF %03x\n",
 163                  idcode, rev, hawkeye, (idcode >> 1) & 0x7ff);
 164         pr_debug("OMAP_TAP_DIE_ID_0: 0x%08x\n", odi.id_0);
 165         pr_debug("OMAP_TAP_DIE_ID_1: 0x%08x DEV_REV: %i\n",
 166                  odi.id_1, (odi.id_1 >> 28) & 0xf);
 167         pr_debug("OMAP_TAP_DIE_ID_2: 0x%08x\n", odi.id_2);
 168         pr_debug("OMAP_TAP_DIE_ID_3: 0x%08x\n", odi.id_3);
 169         pr_debug("OMAP_TAP_PROD_ID_0: 0x%08x DEV_TYPE: %i\n",
 170                  prod_id, dev_type);
 171
 172         /* Check hawkeye ids */
 173         for (i = 0; i < ARRAY_SIZE(omap_ids); i++) {
 174                 if (hawkeye == omap_ids[i].hawkeye)
 175                         break;
 176         }
 177
 178         if (i == ARRAY_SIZE(omap_ids)) {
 179                 printk(KERN_ERR "Unknown OMAP CPU id\n");
 180                 return;
 181         }
 182
 183         for (j = i; j < ARRAY_SIZE(omap_ids); j++) {
 184                 if (dev_type == omap_ids[j].dev)
 185                         break;
 186         }
 187
 188         if (j == ARRAY_SIZE(omap_ids)) {
 189                 pr_err("Unknown OMAP device type. Handling it as OMAP%04x\n",
 190                        omap_ids[i].type >> 16);
 191                 j = i;
 192         }
 193
 194         sprintf(soc_name, "OMAP%04x", omap_rev() >> 16);
 195         sprintf(soc_rev, "ES%x", (omap_rev() >> 12) & 0xf);
 196
 197         pr_info("%s", soc_name);
 198         if ((omap_rev() >> 8) & 0x0f)
 199                 pr_info("%s", soc_rev);
 200         pr_info("\n");
 201 }
 202
 203 #define OMAP3_SHOW_FEATURE(feat)                \
 204         if (omap3_has_ ##feat())                \
 205                 printk(#feat" ");
 206
 207 static void __init omap3_cpuinfo(void)
 208 {
 209         const char *cpu_name;
 210
 211         /*
 212          * OMAP3430 and OMAP3530 are assumed to be same.
 213          *
 214          * OMAP3525, OMAP3515 and OMAP3503 can be detected only based
 215          * on available features. Upon detection, update the CPU id
 216          * and CPU class bits.
 217          */
 218         if (cpu_is_omap3630()) {
 219                 cpu_name = "OMAP3630";
 220         } else if (soc_is_am35xx()) {
 221                 cpu_name = (omap3_has_sgx()) ? "AM3517" : "AM3505";
 222         } else if (cpu_is_ti816x()) {
 223                 cpu_name = "TI816X";
 224         } else if (soc_is_am335x()) {
 225                 cpu_name =  "AM335X";
 226         } else if (soc_is_am437x()) {
 227                 cpu_name =  "AM437x";
 228         } else if (cpu_is_ti814x()) {
 229                 cpu_name = "TI814X";
 230         } else if (omap3_has_iva() && omap3_has_sgx()) {
 231                 /* OMAP3430, OMAP3525, OMAP3515, OMAP3503 devices */
 232                 cpu_name = "OMAP3430/3530";
 233         } else if (omap3_has_iva()) {
 234                 cpu_name = "OMAP3525";
 235         } else if (omap3_has_sgx()) {
 236                 cpu_name = "OMAP3515";
 237         } else {
 238                 cpu_name = "OMAP3503";
 239         }
 240
 241         sprintf(soc_name, "%s", cpu_name);
 242
 243         /* Print verbose information */
 244         pr_info("%s %s (", soc_name, soc_rev);
 245
 246         OMAP3_SHOW_FEATURE(l2cache);
 247         OMAP3_SHOW_FEATURE(iva);
 248         OMAP3_SHOW_FEATURE(sgx);
 249         OMAP3_SHOW_FEATURE(neon);
 250         OMAP3_SHOW_FEATURE(isp);
 251         OMAP3_SHOW_FEATURE(192mhz_clk);
 252
 253         printk(")\n");
 254 }
 255
 256 #define OMAP3_CHECK_FEATURE(status,feat)                                \
 257         if (((status & OMAP3_ ##feat## _MASK)                           \
 258                 >> OMAP3_ ##feat## _SHIFT) != FEAT_ ##feat## _NONE) {   \
 259                 omap_features |= OMAP3_HAS_ ##feat;                     \
 260         }
 261
 262 void __init omap3xxx_check_features(void)
 263 {
 264         u32 status;
 265
 266         omap_features = 0;
 267
 268         status = omap_ctrl_readl(OMAP3_CONTROL_OMAP_STATUS);
 269
 270         OMAP3_CHECK_FEATURE(status, L2CACHE);
 271         OMAP3_CHECK_FEATURE(status, IVA);
 272         OMAP3_CHECK_FEATURE(status, SGX);
 273         OMAP3_CHECK_FEATURE(status, NEON);
 274         OMAP3_CHECK_FEATURE(status, ISP);
 275         if (cpu_is_omap3630())
 276                 omap_features |= OMAP3_HAS_192MHZ_CLK;
 277         if (cpu_is_omap3430() || cpu_is_omap3630())
 278                 omap_features |= OMAP3_HAS_IO_WAKEUP;
 279         if (cpu_is_omap3630() || omap_rev() == OMAP3430_REV_ES3_1 ||
 280             omap_rev() == OMAP3430_REV_ES3_1_2)
 281                 omap_features |= OMAP3_HAS_IO_CHAIN_CTRL;
 282
 283         omap_features |= OMAP3_HAS_SDRC;
 284
 285         /*
 286          * am35x fixups:
 287          * - The am35x Chip ID register has bits 12, 7:5, and 3:2 marked as
 288          *   reserved and therefore return 0 when read.  Unfortunately,
 289          *   OMAP3_CHECK_FEATURE() will interpret some of those zeroes to
 290          *   mean that a feature is present even though it isn't so clear
 291          *   the incorrectly set feature bits.
 292          */
 293         if (soc_is_am35xx())
 294                 omap_features &= ~(OMAP3_HAS_IVA | OMAP3_HAS_ISP);
 295
 296         /*
 297          * TODO: Get additional info (where applicable)
 298          *       e.g. Size of L2 cache.
 299          */
 300
 301         omap3_cpuinfo();
 302 }
 303
 304 void __init omap4xxx_check_features(void)
 305 {
 306         u32 si_type;
 307
 308         si_type =
 309         (read_tap_reg(OMAP4_CTRL_MODULE_CORE_STD_FUSE_PROD_ID_1) >> 16) & 0x03;
 310
 311         if (si_type == OMAP4_SILICON_TYPE_PERFORMANCE)
 312                 omap_features = OMAP4_HAS_PERF_SILICON;
 313 }
 314
 315 void __init ti81xx_check_features(void)
 316 {
 317         omap_features = OMAP3_HAS_NEON;
 318         omap3_cpuinfo();
 319 }
 320
 321 void __init am33xx_check_features(void)
 322 {
 323         u32 status;
 324
 325         omap_features = OMAP3_HAS_NEON;
 326
 327         status = omap_ctrl_readl(AM33XX_DEV_FEATURE);
 328         if (status & AM33XX_SGX_MASK)
 329                 omap_features |= OMAP3_HAS_SGX;
 330
 331         omap3_cpuinfo();
 332 }
 333
 334 void __init omap3xxx_check_revision(void)
 335 {
 336         const char *cpu_rev;
 337         u32 cpuid, idcode;
 338         u16 hawkeye;
 339         u8 rev;
 340
 341         /*
 342          * We cannot access revision registers on ES1.0.
 343          * If the processor type is Cortex-A8 and the revision is 0x0
 344          * it means its Cortex r0p0 which is 3430 ES1.0.
 345          */
 346         cpuid = read_cpuid_id();
 347         if ((((cpuid >> 4) & 0xfff) == 0xc08) && ((cpuid & 0xf) == 0x0)) {
 348                 omap_revision = OMAP3430_REV_ES1_0;
 349                 cpu_rev = "1.0";
 350                 return;
 351         }
 352
 353         /*
 354          * Detection for 34xx ES2.0 and above can be done with just
 355          * hawkeye and rev. See TRM 1.5.2 Device Identification.
 356          * Note that rev does not map directly to our defined processor
 357          * revision numbers as ES1.0 uses value 0.
 358          */
 359         idcode = read_tap_reg(OMAP_TAP_IDCODE);
 360         hawkeye = (idcode >> 12) & 0xffff;
 361         rev = (idcode >> 28) & 0xff;
 362
 363         switch (hawkeye) {
 364         case 0xb7ae:
 365                 /* Handle 34xx/35xx devices */
 366                 switch (rev) {
 367                 case 0: /* Take care of early samples */
 368                 case 1:
 369                         omap_revision = OMAP3430_REV_ES2_0;
 370                         cpu_rev = "2.0";
 371                         break;
 372                 case 2:
 373                         omap_revision = OMAP3430_REV_ES2_1;
 374                         cpu_rev = "2.1";
 375                         break;
 376                 case 3:
 377                         omap_revision = OMAP3430_REV_ES3_0;
 378                         cpu_rev = "3.0";
 379                         break;
 380                 case 4:
 381                         omap_revision = OMAP3430_REV_ES3_1;
 382                         cpu_rev = "3.1";
 383                         break;
 384                 case 7:
 385                 /* FALLTHROUGH */
 386                 default:
 387                         /* Use the latest known revision as default */
 388                         omap_revision = OMAP3430_REV_ES3_1_2;
 389                         cpu_rev = "3.1.2";
 390                 }
 391                 break;
 392         case 0xb868:
 393                 /*
 394                  * Handle OMAP/AM 3505/3517 devices
 395                  *
 396                  * Set the device to be OMAP3517 here. Actual device
 397                  * is identified later based on the features.
 398                  */
 399                 switch (rev) {
 400                 case 0:
 401                         omap_revision = AM35XX_REV_ES1_0;
 402                         cpu_rev = "1.0";
 403                         break;
 404                 case 1:
 405                 /* FALLTHROUGH */
 406                 default:
 407                         omap_revision = AM35XX_REV_ES1_1;
 408                         cpu_rev = "1.1";
 409                 }
 410                 break;
 411         case 0xb891:
 412                 /* Handle 36xx devices */
 413
 414                 switch(rev) {
 415                 case 0: /* Take care of early samples */
 416                         omap_revision = OMAP3630_REV_ES1_0;
 417                         cpu_rev = "1.0";
 418                         break;
 419                 case 1:
 420                         omap_revision = OMAP3630_REV_ES1_1;
 421                         cpu_rev = "1.1";
 422                         break;
 423                 case 2:
 424                 /* FALLTHROUGH */
 425                 default:
 426                         omap_revision = OMAP3630_REV_ES1_2;
 427                         cpu_rev = "1.2";
 428                 }
 429                 break;
 430         case 0xb81e:
 431                 switch (rev) {
 432                 case 0:
 433                         omap_revision = TI8168_REV_ES1_0;
 434                         cpu_rev = "1.0";
 435                         break;
 436                 case 1:
 437                         omap_revision = TI8168_REV_ES1_1;
 438                         cpu_rev = "1.1";
 439                         break;
 440                 case 2:
 441                         omap_revision = TI8168_REV_ES2_0;
 442                         cpu_rev = "2.0";
 443                         break;
 444                 case 3:
 445                         /* FALLTHROUGH */
 446                 default:
 447                         omap_revision = TI8168_REV_ES2_1;
 448                         cpu_rev = "2.1";
 449                 }
 450                 break;
 451         case 0xb944:
 452                 switch (rev) {
 453                 case 0:
 454                         omap_revision = AM335X_REV_ES1_0;
 455                         cpu_rev = "1.0";
 456                         break;
 457                 case 1:
 458                         omap_revision = AM335X_REV_ES2_0;
 459                         cpu_rev = "2.0";
 460                         break;
 461                 case 2:
 462                 /* FALLTHROUGH */
 463                 default:
 464                         omap_revision = AM335X_REV_ES2_1;
 465                         cpu_rev = "2.1";
 466                         break;
 467                 }
 468                 break;
 469         case 0xb98c:
 470                 switch (rev) {
 471                 case 0:
 472                         omap_revision = AM437X_REV_ES1_0;
 473                         cpu_rev = "1.0";
 474                         break;
 475                 case 1:
 476                         omap_revision = AM437X_REV_ES1_1;
 477                         cpu_rev = "1.1";
 478                         break;
 479                 case 2:
 480                 /* FALLTHROUGH */
 481                 default:
 482                         omap_revision = AM437X_REV_ES1_2;
 483                         cpu_rev = "1.2";
 484                         break;
 485                 }
 486                 break;
 487         case 0xb8f2:
 488                 switch (rev) {
 489                 case 0:
 490                 /* FALLTHROUGH */
 491                 case 1:
 492                         omap_revision = TI8148_REV_ES1_0;
 493                         cpu_rev = "1.0";
 494                         break;
 495                 case 2:
 496                         omap_revision = TI8148_REV_ES2_0;
 497                         cpu_rev = "2.0";
 498                         break;
 499                 case 3:
 500                 /* FALLTHROUGH */
 501                 default:
 502                         omap_revision = TI8148_REV_ES2_1;
 503                         cpu_rev = "2.1";
 504                         break;
 505                 }
 506                 break;
 507         default:
 508                 /* Unknown default to latest silicon rev as default */
 509                 omap_revision = OMAP3630_REV_ES1_2;
 510                 cpu_rev = "1.2";
 511                 pr_warn("Warning: unknown chip type; assuming OMAP3630ES1.2\n");
 512         }
 513         sprintf(soc_rev, "ES%s", cpu_rev);
 514 }
 515
 516 void __init omap4xxx_check_revision(void)
 517 {
 518         u32 idcode;
 519         u16 hawkeye;
 520         u8 rev;
 521
 522         /*
 523          * The IC rev detection is done with hawkeye and rev.
 524          * Note that rev does not map directly to defined processor
 525          * revision numbers as ES1.0 uses value 0.
 526          */
 527         idcode = read_tap_reg(OMAP_TAP_IDCODE);
 528         hawkeye = (idcode >> 12) & 0xffff;
 529         rev = (idcode >> 28) & 0xf;
 530
 531         /*
 532          * Few initial 4430 ES2.0 samples IDCODE is same as ES1.0
 533          * Use ARM register to detect the correct ES version
 534          */
 535         if (!rev && (hawkeye != 0xb94e) && (hawkeye != 0xb975)) {
 536                 idcode = read_cpuid_id();
 537                 rev = (idcode & 0xf) - 1;
 538         }
 539
 540         switch (hawkeye) {
 541         case 0xb852:
 542                 switch (rev) {
 543                 case 0:
 544                         omap_revision = OMAP4430_REV_ES1_0;
 545                         break;
 546                 case 1:
 547                 default:
 548                         omap_revision = OMAP4430_REV_ES2_0;
 549                 }
 550                 break;
 551         case 0xb95c:
 552                 switch (rev) {
 553                 case 3:
 554                         omap_revision = OMAP4430_REV_ES2_1;
 555                         break;
 556                 case 4:
 557                         omap_revision = OMAP4430_REV_ES2_2;
 558                         break;
 559                 case 6:
 560                 default:
 561                         omap_revision = OMAP4430_REV_ES2_3;
 562                 }
 563                 break;
 564         case 0xb94e:
 565                 switch (rev) {
 566                 case 0:
 567                         omap_revision = OMAP4460_REV_ES1_0;
 568                         break;
 569                 case 2:
 570                 default:
 571                         omap_revision = OMAP4460_REV_ES1_1;
 572                         break;
 573                 }
 574                 break;
 575         case 0xb975:
 576                 switch (rev) {
 577                 case 0:
 578                 default:
 579                         omap_revision = OMAP4470_REV_ES1_0;
 580                         break;
 581                 }
 582                 break;
 583         default:
 584                 /* Unknown default to latest silicon rev as default */
 585                 omap_revision = OMAP4430_REV_ES2_3;
 586         }
 587
 588         sprintf(soc_name, "OMAP%04x", omap_rev() >> 16);
 589         sprintf(soc_rev, "ES%d.%d", (omap_rev() >> 12) & 0xf,
 590                                                 (omap_rev() >> 8) & 0xf);
 591         pr_info("%s %s\n", soc_name, soc_rev);
 592 }
 593
 594 void __init omap5xxx_check_revision(void)
 595 {
 596         u32 idcode;
 597         u16 hawkeye;
 598         u8 rev;
 599
 600         idcode = read_tap_reg(OMAP_TAP_IDCODE);
 601         hawkeye = (idcode >> 12) & 0xffff;
 602         rev = (idcode >> 28) & 0xff;
 603         switch (hawkeye) {
 604         case 0xb942:
 605                 switch (rev) {
 606                 case 0:
 607                         /* No support for ES1.0 Test chip */
 608                         BUG();
 609                 case 1:
 610                 default:
 611                         omap_revision = OMAP5430_REV_ES2_0;
 612                 }
 613                 break;
 614
 615         case 0xb998:
 616                 switch (rev) {
 617                 case 0:
 618                         /* No support for ES1.0 Test chip */
 619                         BUG();
 620                 case 1:
 621                 default:
 622                         omap_revision = OMAP5432_REV_ES2_0;
 623                 }
 624                 break;
 625
 626         default:
 627                 /* Unknown default to latest silicon rev as default*/
 628                 omap_revision = OMAP5430_REV_ES2_0;
 629         }
 630
 631         sprintf(soc_name, "OMAP%04x", omap_rev() >> 16);
 632         sprintf(soc_rev, "ES%d.0", (omap_rev() >> 12) & 0xf);
 633
 634         pr_info("%s %s\n", soc_name, soc_rev);
 635 }
 636
 637 void __init dra7xxx_check_revision(void)
 638 {
 639         u32 idcode;
 640         u16 hawkeye;
 641         u8 rev;
 642
 643         idcode = read_tap_reg(OMAP_TAP_IDCODE);
 644         hawkeye = (idcode >> 12) & 0xffff;
 645         rev = (idcode >> 28) & 0xff;
 646         switch (hawkeye) {
 647         case 0xb990:
 648                 switch (rev) {
 649                 case 0:
 650                         omap_revision = DRA752_REV_ES1_0;
 651                         break;
 652                 case 1:
 653                 default:
 654                         omap_revision = DRA752_REV_ES1_1;
 655                 }
 656                 break;
 657
 658         case 0xb9bc:
 659                 switch (rev) {
 660                 case 0:
 661                         omap_revision = DRA722_REV_ES1_0;
 662                         break;
 663                 default:
 664                         /* If we have no new revisions */
 665                         omap_revision = DRA722_REV_ES1_0;
 666                         break;
 667                 }
 668                 break;
 669
 670         default:
 671                 /* Unknown default to latest silicon rev as default*/
 672                 pr_warn("%s: unknown idcode=0x%08x (hawkeye=0x%08x,rev=0x%x)\n",
 673                         __func__, idcode, hawkeye, rev);
 674                 omap_revision = DRA752_REV_ES1_1;
 675         }
 676
 677         sprintf(soc_name, "DRA%03x", omap_rev() >> 16);
 678         sprintf(soc_rev, "ES%d.%d", (omap_rev() >> 12) & 0xf,
 679                 (omap_rev() >> 8) & 0xf);
 680
 681         pr_info("%s %s\n", soc_name, soc_rev);
 682 }
 683
 684 /*
 685  * Set up things for map_io and processor detection later on. Gets called
 686  * pretty much first thing from board init. For multi-omap, this gets
 687  * cpu_is_omapxxxx() working accurately enough for map_io. Then we'll try to
 688  * detect the exact revision later on in omap2_detect_revision() once map_io
 689  * is done.
 690  */
 691 void __init omap2_set_globals_tap(u32 class, void __iomem *tap)
 692 {
 693         omap_revision = class;
 694         tap_base = tap;
 695
 696         /* XXX What is this intended to do? */
 697         if (cpu_is_omap34xx())
 698                 tap_prod_id = 0x0210;
 699         else
 700                 tap_prod_id = 0x0208;
 701 }
 702
 703 #ifdef CONFIG_SOC_BUS
 704
 705 static const char * const omap_types[] = {
 706         [OMAP2_DEVICE_TYPE_TEST]        = "TST",
 707         [OMAP2_DEVICE_TYPE_EMU]         = "EMU",
 708         [OMAP2_DEVICE_TYPE_SEC]         = "HS",
 709         [OMAP2_DEVICE_TYPE_GP]          = "GP",
 710         [OMAP2_DEVICE_TYPE_BAD]         = "BAD",
 711 };
 712
 713 static const char * __init omap_get_family(void)
 714 {
 715         if (cpu_is_omap24xx())
 716                 return kasprintf(GFP_KERNEL, "OMAP2");
 717         else if (cpu_is_omap34xx())
 718                 return kasprintf(GFP_KERNEL, "OMAP3");
 719         else if (cpu_is_omap44xx())
 720                 return kasprintf(GFP_KERNEL, "OMAP4");
 721         else if (soc_is_omap54xx())
 722                 return kasprintf(GFP_KERNEL, "OMAP5");
 723         else if (soc_is_am43xx())
 724                 return kasprintf(GFP_KERNEL, "AM43xx");
 725         else if (soc_is_dra7xx())
 726                 return kasprintf(GFP_KERNEL, "DRA7");
 727         else
 728                 return kasprintf(GFP_KERNEL, "Unknown");
 729 }
 730
 731 static ssize_t omap_get_type(struct device *dev,
 732                                         struct device_attribute *attr,
 733                                         char *buf)
 734 {
 735         return sprintf(buf, "%s\n", omap_types[omap_type()]);
 736 }
 737
 738 static struct device_attribute omap_soc_attr =
 739         __ATTR(type,  S_IRUGO, omap_get_type,  NULL);
 740
 741 void __init omap_soc_device_init(void)
 742 {
 743         struct device *parent;
 744         struct soc_device *soc_dev;
 745         struct soc_device_attribute *soc_dev_attr;
 746
 747         soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
 748         if (!soc_dev_attr)
 749                 return;
 750
 751         soc_dev_attr->machine  = soc_name;
 752         soc_dev_attr->family   = omap_get_family();
 753         soc_dev_attr->revision = soc_rev;
 754
 755         soc_dev = soc_device_register(soc_dev_attr);
 756         if (IS_ERR(soc_dev)) {
 757                 kfree(soc_dev_attr);
 758                 return;
 759         }
 760
 761         parent = soc_device_to_device(soc_dev);
 762         device_create_file(parent, &omap_soc_attr);
 763 }
 764 #endif /* CONFIG_SOC_BUS */