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 omap3_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                 omap3_features |= OMAP3_HAS_ ##feat;                    \
 187         }
 188
 189 static void __init omap3_check_features(void)
 190 {
 191         u32 status;
 192
 193         omap3_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                 omap3_features |= OMAP3_HAS_192MHZ_CLK;
 204         if (!cpu_is_omap3505() && !cpu_is_omap3517())
 205                 omap3_features |= OMAP3_HAS_IO_WAKEUP;
 206
 207         omap3_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 ti816x_check_features(void)
 216 {
 217         omap3_features = OMAP3_HAS_NEON;
 218 }
 219
 220 static void __init omap3_check_revision(void)
 221 {
 222         u32 cpuid, idcode;
 223         u16 hawkeye;
 224         u8 rev;
 225
 226         omap_chip.oc = CHIP_IS_OMAP3430;
 227
 228         /*
 229          * We cannot access revision registers on ES1.0.
 230          * If the processor type is Cortex-A8 and the revision is 0x0
 231          * it means its Cortex r0p0 which is 3430 ES1.0.
 232          */
 233         cpuid = read_cpuid(CPUID_ID);
 234         if ((((cpuid >> 4) & 0xfff) == 0xc08) && ((cpuid & 0xf) == 0x0)) {
 235                 omap_revision = OMAP3430_REV_ES1_0;
 236                 omap_chip.oc |= CHIP_IS_OMAP3430ES1;
 237                 return;
 238         }
 239
 240         /*
 241          * Detection for 34xx ES2.0 and above can be done with just
 242          * hawkeye and rev. See TRM 1.5.2 Device Identification.
 243          * Note that rev does not map directly to our defined processor
 244          * revision numbers as ES1.0 uses value 0.
 245          */
 246         idcode = read_tap_reg(OMAP_TAP_IDCODE);
 247         hawkeye = (idcode >> 12) & 0xffff;
 248         rev = (idcode >> 28) & 0xff;
 249
 250         switch (hawkeye) {
 251         case 0xb7ae:
 252                 /* Handle 34xx/35xx devices */
 253                 switch (rev) {
 254                 case 0: /* Take care of early samples */
 255                 case 1:
 256                         omap_revision = OMAP3430_REV_ES2_0;
 257                         omap_chip.oc |= CHIP_IS_OMAP3430ES2;
 258                         break;
 259                 case 2:
 260                         omap_revision = OMAP3430_REV_ES2_1;
 261                         omap_chip.oc |= CHIP_IS_OMAP3430ES2;
 262                         break;
 263                 case 3:
 264                         omap_revision = OMAP3430_REV_ES3_0;
 265                         omap_chip.oc |= CHIP_IS_OMAP3430ES3_0;
 266                         break;
 267                 case 4:
 268                         omap_revision = OMAP3430_REV_ES3_1;
 269                         omap_chip.oc |= CHIP_IS_OMAP3430ES3_1;
 270                         break;
 271                 case 7:
 272                 /* FALLTHROUGH */
 273                 default:
 274                         /* Use the latest known revision as default */
 275                         omap_revision = OMAP3430_REV_ES3_1_2;
 276
 277                         /* REVISIT: Add CHIP_IS_OMAP3430ES3_1_2? */
 278                         omap_chip.oc |= CHIP_IS_OMAP3430ES3_1;
 279                 }
 280                 break;
 281         case 0xb868:
 282                 /* Handle OMAP35xx/AM35xx devices
 283                  *
 284                  * Set the device to be OMAP3505 here. Actual device
 285                  * is identified later based on the features.
 286                  *
 287                  * REVISIT: AM3505/AM3517 should have their own CHIP_IS
 288                  */
 289                 omap_revision = OMAP3505_REV(rev);
 290                 omap_chip.oc |= CHIP_IS_OMAP3430ES3_1;
 291                 break;
 292         case 0xb891:
 293                 /* Handle 36xx devices */
 294                 omap_chip.oc |= CHIP_IS_OMAP3630ES1;
 295
 296                 switch(rev) {
 297                 case 0: /* Take care of early samples */
 298                         omap_revision = OMAP3630_REV_ES1_0;
 299                         break;
 300                 case 1:
 301                         omap_revision = OMAP3630_REV_ES1_1;
 302                         omap_chip.oc |= CHIP_IS_OMAP3630ES1_1;
 303                         break;
 304                 case 2:
 305                 default:
 306                         omap_revision =  OMAP3630_REV_ES1_2;
 307                         omap_chip.oc |= CHIP_IS_OMAP3630ES1_2;
 308                 }
 309                 break;
 310         case 0xb81e:
 311                 omap_chip.oc = CHIP_IS_TI816X;
 312
 313                 switch (rev) {
 314                 case 0:
 315                         omap_revision = TI8168_REV_ES1_0;
 316                         break;
 317                 case 1:
 318                         omap_revision = TI8168_REV_ES1_1;
 319                         break;
 320                 default:
 321                         omap_revision =  TI8168_REV_ES1_1;
 322                 }
 323                 break;
 324         default:
 325                 /* Unknown default to latest silicon rev as default*/
 326                 omap_revision =  OMAP3630_REV_ES1_2;
 327                 omap_chip.oc |= CHIP_IS_OMAP3630ES1_2;
 328         }
 329 }
 330
 331 static void __init omap4_check_revision(void)
 332 {
 333         u32 idcode;
 334         u16 hawkeye;
 335         u8 rev;
 336
 337         /*
 338          * The IC rev detection is done with hawkeye and rev.
 339          * Note that rev does not map directly to defined processor
 340          * revision numbers as ES1.0 uses value 0.
 341          */
 342         idcode = read_tap_reg(OMAP_TAP_IDCODE);
 343         hawkeye = (idcode >> 12) & 0xffff;
 344         rev = (idcode >> 28) & 0xf;
 345
 346         /*
 347          * Few initial 4430 ES2.0 samples IDCODE is same as ES1.0
 348          * Use ARM register to detect the correct ES version
 349          */
 350         if (!rev && (hawkeye != 0xb94e)) {
 351                 idcode = read_cpuid(CPUID_ID);
 352                 rev = (idcode & 0xf) - 1;
 353         }
 354
 355         switch (hawkeye) {
 356         case 0xb852:
 357                 switch (rev) {
 358                 case 0:
 359                         omap_revision = OMAP4430_REV_ES1_0;
 360                         omap_chip.oc |= CHIP_IS_OMAP4430ES1;
 361                         break;
 362                 case 1:
 363                 default:
 364                         omap_revision = OMAP4430_REV_ES2_0;
 365                         omap_chip.oc |= CHIP_IS_OMAP4430ES2;
 366                 }
 367                 break;
 368         case 0xb95c:
 369                 switch (rev) {
 370                 case 3:
 371                         omap_revision = OMAP4430_REV_ES2_1;
 372                         omap_chip.oc |= CHIP_IS_OMAP4430ES2_1;
 373                         break;
 374                 case 4:
 375                 default:
 376                         omap_revision = OMAP4430_REV_ES2_2;
 377                         omap_chip.oc |= CHIP_IS_OMAP4430ES2_2;
 378                 }
 379                 break;
 380         case 0xb94e:
 381                 switch (rev) {
 382                 case 0:
 383                 default:
 384                         omap_revision = OMAP4460_REV_ES1_0;
 385                         omap_chip.oc |= CHIP_IS_OMAP4460ES1_0;
 386                         break;
 387                 }
 388                 break;
 389         default:
 390                 /* Unknown default to latest silicon rev as default */
 391                 omap_revision = OMAP4430_REV_ES2_2;
 392                 omap_chip.oc |= CHIP_IS_OMAP4430ES2_2;
 393         }
 394
 395         pr_info("OMAP%04x ES%d.%d\n", omap_rev() >> 16,
 396                 ((omap_rev() >> 12) & 0xf), ((omap_rev() >> 8) & 0xf));
 397 }
 398
 399 #define OMAP3_SHOW_FEATURE(feat)                \
 400         if (omap3_has_ ##feat())                \
 401                 printk(#feat" ");
 402
 403 static void __init omap3_cpuinfo(void)
 404 {
 405         u8 rev = GET_OMAP_REVISION();
 406         char cpu_name[16], cpu_rev[16];
 407
 408         /* OMAP3430 and OMAP3530 are assumed to be same.
 409          *
 410          * OMAP3525, OMAP3515 and OMAP3503 can be detected only based
 411          * on available features. Upon detection, update the CPU id
 412          * and CPU class bits.
 413          */
 414         if (cpu_is_omap3630()) {
 415                 strcpy(cpu_name, "OMAP3630");
 416         } else if (cpu_is_omap3505()) {
 417                 /*
 418                  * AM35xx devices
 419                  */
 420                 if (omap3_has_sgx()) {
 421                         omap_revision = OMAP3517_REV(rev);
 422                         strcpy(cpu_name, "AM3517");
 423                 } else {
 424                         /* Already set in omap3_check_revision() */
 425                         strcpy(cpu_name, "AM3505");
 426                 }
 427         } else if (cpu_is_ti816x()) {
 428                 strcpy(cpu_name, "TI816X");
 429         } else if (omap3_has_iva() && omap3_has_sgx()) {
 430                 /* OMAP3430, OMAP3525, OMAP3515, OMAP3503 devices */
 431                 strcpy(cpu_name, "OMAP3430/3530");
 432         } else if (omap3_has_iva()) {
 433                 omap_revision = OMAP3525_REV(rev);
 434                 strcpy(cpu_name, "OMAP3525");
 435         } else if (omap3_has_sgx()) {
 436                 omap_revision = OMAP3515_REV(rev);
 437                 strcpy(cpu_name, "OMAP3515");
 438         } else {
 439                 omap_revision = OMAP3503_REV(rev);
 440                 strcpy(cpu_name, "OMAP3503");
 441         }
 442
 443         if (cpu_is_omap3630() || cpu_is_ti816x()) {
 444                 switch (rev) {
 445                 case OMAP_REVBITS_00:
 446                         strcpy(cpu_rev, "1.0");
 447                         break;
 448                 case OMAP_REVBITS_01:
 449                         strcpy(cpu_rev, "1.1");
 450                         break;
 451                 case OMAP_REVBITS_02:
 452                         /* FALLTHROUGH */
 453                 default:
 454                         /* Use the latest known revision as default */
 455                         strcpy(cpu_rev, "1.2");
 456                 }
 457         } else if (cpu_is_omap3505() || cpu_is_omap3517()) {
 458                 switch (rev) {
 459                 case OMAP_REVBITS_00:
 460                         strcpy(cpu_rev, "1.0");
 461                         break;
 462                 case OMAP_REVBITS_01:
 463                         /* FALLTHROUGH */
 464                 default:
 465                         /* Use the latest known revision as default */
 466                         strcpy(cpu_rev, "1.1");
 467                 }
 468         } else {
 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, "2.0");
 475                         break;
 476                 case OMAP_REVBITS_02:
 477                         strcpy(cpu_rev, "2.1");
 478                         break;
 479                 case OMAP_REVBITS_03:
 480                         strcpy(cpu_rev, "3.0");
 481                         break;
 482                 case OMAP_REVBITS_04:
 483                         strcpy(cpu_rev, "3.1");
 484                         break;
 485                 case OMAP_REVBITS_05:
 486                         /* FALLTHROUGH */
 487                 default:
 488                         /* Use the latest known revision as default */
 489                         strcpy(cpu_rev, "3.1.2");
 490                 }
 491         }
 492
 493         /* Print verbose information */
 494         pr_info("%s ES%s (", cpu_name, cpu_rev);
 495
 496         OMAP3_SHOW_FEATURE(l2cache);
 497         OMAP3_SHOW_FEATURE(iva);
 498         OMAP3_SHOW_FEATURE(sgx);
 499         OMAP3_SHOW_FEATURE(neon);
 500         OMAP3_SHOW_FEATURE(isp);
 501         OMAP3_SHOW_FEATURE(192mhz_clk);
 502
 503         printk(")\n");
 504 }
 505
 506 /*
 507  * Try to detect the exact revision of the omap we're running on
 508  */
 509 void __init omap2_check_revision(void)
 510 {
 511         /*
 512          * At this point we have an idea about the processor revision set
 513          * earlier with omap2_set_globals_tap().
 514          */
 515         if (cpu_is_omap24xx()) {
 516                 omap24xx_check_revision();
 517         } else if (cpu_is_omap34xx()) {
 518                 omap3_check_revision();
 519
 520                 /* TI816X doesn't have feature register */
 521                 if (!cpu_is_ti816x())
 522                         omap3_check_features();
 523                 else
 524                         ti816x_check_features();
 525
 526                 omap3_cpuinfo();
 527                 return;
 528         } else if (cpu_is_omap44xx()) {
 529                 omap4_check_revision();
 530                 return;
 531         } else {
 532                 pr_err("OMAP revision unknown, please fix!\n");
 533         }
 534
 535         /*
 536          * OK, now we know the exact revision. Initialize omap_chip bits
 537          * for powerdowmain and clockdomain code.
 538          */
 539         if (cpu_is_omap243x()) {
 540                 /* Currently only supports 2430ES2.1 and 2430-all */
 541                 omap_chip.oc |= CHIP_IS_OMAP2430;
 542                 return;
 543         } else if (cpu_is_omap242x()) {
 544                 /* Currently only supports 2420ES2.1.1 and 2420-all */
 545                 omap_chip.oc |= CHIP_IS_OMAP2420;
 546                 return;
 547         }
 548
 549         pr_err("Uninitialized omap_chip, please fix!\n");
 550 }
 551
 552 /*
 553  * Set up things for map_io and processor detection later on. Gets called
 554  * pretty much first thing from board init. For multi-omap, this gets
 555  * cpu_is_omapxxxx() working accurately enough for map_io. Then we'll try to
 556  * detect the exact revision later on in omap2_detect_revision() once map_io
 557  * is done.
 558  */
 559 void __init omap2_set_globals_tap(struct omap_globals *omap2_globals)
 560 {
 561         omap_revision = omap2_globals->class;
 562         tap_base = omap2_globals->tap;
 563
 564         if (cpu_is_omap34xx())
 565                 tap_prod_id = 0x0210;
 566         else
 567                 tap_prod_id = 0x0208;
 568 }