arch/arm/mach-omap2/id.c

   1 /*
   2  * linux/arch/arm/mach-omap2/id.c
   3  *
   4  * OMAP2 CPU identification code
   5  *
   6  * Copyright (C) 2005 Nokia Corporation
   7  * Written by Tony Lindgren <tony@atomide.com>
   8  *
   9  * Copyright (C) 2009-11 Texas Instruments
  10  * Added OMAP4 support - Santosh Shilimkar <santosh.shilimkar@ti.com>
  11  *
  12  * This program is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU General Public License version 2 as
  14  * published by the Free Software Foundation.
  15  */
  16
  17 #include <linux/module.h>
  18 #include <linux/kernel.h>
  19 #include <linux/init.h>
  20 #include <linux/io.h>
  21
  22 #include <asm/cputype.h>
  23
  24 #include "common.h"
  25 #include <plat/cpu.h>
  26
  27 #include <mach/id.h>
  28
  29 #include "control.h"
  30
  31 static unsigned int omap_revision;
  32 static const char *cpu_rev;
  33 u32 omap_features;
  34
  35 unsigned int omap_rev(void)
  36 {
  37         return omap_revision;
  38 }
  39 EXPORT_SYMBOL(omap_rev);
  40
  41 int omap_type(void)
  42 {
  43         u32 val = 0;
  44
  45         if (cpu_is_omap24xx()) {
  46                 val = omap_ctrl_readl(OMAP24XX_CONTROL_STATUS);
  47         } else if (cpu_is_am33xx()) {
  48                 val = omap_ctrl_readl(AM33XX_CONTROL_STATUS);
  49         } else if (cpu_is_omap34xx()) {
  50                 val = omap_ctrl_readl(OMAP343X_CONTROL_STATUS);
  51         } else if (cpu_is_omap44xx()) {
  52                 val = omap_ctrl_readl(OMAP4_CTRL_MODULE_CORE_STATUS);
  53         } else {
  54                 pr_err("Cannot detect omap type!\n");
  55                 goto out;
  56         }
  57
  58         val &= OMAP2_DEVICETYPE_MASK;
  59         val >>= 8;
  60
  61 out:
  62         return val;
  63 }
  64 EXPORT_SYMBOL(omap_type);
  65
  66
  67 /*----------------------------------------------------------------------------*/
  68
  69 #define OMAP_TAP_IDCODE         0x0204
  70 #define OMAP_TAP_DIE_ID_0       0x0218
  71 #define OMAP_TAP_DIE_ID_1       0x021C
  72 #define OMAP_TAP_DIE_ID_2       0x0220
  73 #define OMAP_TAP_DIE_ID_3       0x0224
  74
  75 #define OMAP_TAP_DIE_ID_44XX_0  0x0200
  76 #define OMAP_TAP_DIE_ID_44XX_1  0x0208
  77 #define OMAP_TAP_DIE_ID_44XX_2  0x020c
  78 #define OMAP_TAP_DIE_ID_44XX_3  0x0210
  79
  80 #define read_tap_reg(reg)       __raw_readl(tap_base  + (reg))
  81
  82 struct omap_id {
  83         u16     hawkeye;        /* Silicon type (Hawkeye id) */
  84         u8      dev;            /* Device type from production_id reg */
  85         u32     type;           /* Combined type id copied to omap_revision */
  86 };
  87
  88 /* Register values to detect the OMAP version */
  89 static struct omap_id omap_ids[] __initdata = {
  90         { .hawkeye = 0xb5d9, .dev = 0x0, .type = 0x24200024 },
  91         { .hawkeye = 0xb5d9, .dev = 0x1, .type = 0x24201024 },
  92         { .hawkeye = 0xb5d9, .dev = 0x2, .type = 0x24202024 },
  93         { .hawkeye = 0xb5d9, .dev = 0x4, .type = 0x24220024 },
  94         { .hawkeye = 0xb5d9, .dev = 0x8, .type = 0x24230024 },
  95         { .hawkeye = 0xb68a, .dev = 0x0, .type = 0x24300024 },
  96 };
  97
  98 static void __iomem *tap_base;
  99 static u16 tap_prod_id;
 100
 101 void omap_get_die_id(struct omap_die_id *odi)
 102 {
 103         if (cpu_is_omap44xx()) {
 104                 odi->id_0 = read_tap_reg(OMAP_TAP_DIE_ID_44XX_0);
 105                 odi->id_1 = read_tap_reg(OMAP_TAP_DIE_ID_44XX_1);
 106                 odi->id_2 = read_tap_reg(OMAP_TAP_DIE_ID_44XX_2);
 107                 odi->id_3 = read_tap_reg(OMAP_TAP_DIE_ID_44XX_3);
 108
 109                 return;
 110         }
 111         odi->id_0 = read_tap_reg(OMAP_TAP_DIE_ID_0);
 112         odi->id_1 = read_tap_reg(OMAP_TAP_DIE_ID_1);
 113         odi->id_2 = read_tap_reg(OMAP_TAP_DIE_ID_2);
 114         odi->id_3 = read_tap_reg(OMAP_TAP_DIE_ID_3);
 115 }
 116
 117 void __init omap2xxx_check_revision(void)
 118 {
 119         int i, j;
 120         u32 idcode, prod_id;
 121         u16 hawkeye;
 122         u8  dev_type, rev;
 123         struct omap_die_id odi;
 124
 125         idcode = read_tap_reg(OMAP_TAP_IDCODE);
 126         prod_id = read_tap_reg(tap_prod_id);
 127         hawkeye = (idcode >> 12) & 0xffff;
 128         rev = (idcode >> 28) & 0x0f;
 129         dev_type = (prod_id >> 16) & 0x0f;
 130         omap_get_die_id(&odi);
 131
 132         pr_debug("OMAP_TAP_IDCODE 0x%08x REV %i HAWKEYE 0x%04x MANF %03x\n",
 133                  idcode, rev, hawkeye, (idcode >> 1) & 0x7ff);
 134         pr_debug("OMAP_TAP_DIE_ID_0: 0x%08x\n", odi.id_0);
 135         pr_debug("OMAP_TAP_DIE_ID_1: 0x%08x DEV_REV: %i\n",
 136                  odi.id_1, (odi.id_1 >> 28) & 0xf);
 137         pr_debug("OMAP_TAP_DIE_ID_2: 0x%08x\n", odi.id_2);
 138         pr_debug("OMAP_TAP_DIE_ID_3: 0x%08x\n", odi.id_3);
 139         pr_debug("OMAP_TAP_PROD_ID_0: 0x%08x DEV_TYPE: %i\n",
 140                  prod_id, dev_type);
 141
 142         /* Check hawkeye ids */
 143         for (i = 0; i < ARRAY_SIZE(omap_ids); i++) {
 144                 if (hawkeye == omap_ids[i].hawkeye)
 145                         break;
 146         }
 147
 148         if (i == ARRAY_SIZE(omap_ids)) {
 149                 printk(KERN_ERR "Unknown OMAP CPU id\n");
 150                 return;
 151         }
 152
 153         for (j = i; j < ARRAY_SIZE(omap_ids); j++) {
 154                 if (dev_type == omap_ids[j].dev)
 155                         break;
 156         }
 157
 158         if (j == ARRAY_SIZE(omap_ids)) {
 159                 printk(KERN_ERR "Unknown OMAP device type. "
 160                                 "Handling it as OMAP%04x\n",
 161                                 omap_ids[i].type >> 16);
 162                 j = i;
 163         }
 164
 165         pr_info("OMAP%04x", omap_rev() >> 16);
 166         if ((omap_rev() >> 8) & 0x0f)
 167                 pr_info("ES%x", (omap_rev() >> 12) & 0xf);
 168         pr_info("\n");
 169 }
 170
 171 #define OMAP3_SHOW_FEATURE(feat)                \
 172         if (omap3_has_ ##feat())                \
 173                 printk(#feat" ");
 174
 175 static void __init omap3_cpuinfo(void)
 176 {
 177         const char *cpu_name;
 178
 179         /*
 180          * OMAP3430 and OMAP3530 are assumed to be same.
 181          *
 182          * OMAP3525, OMAP3515 and OMAP3503 can be detected only based
 183          * on available features. Upon detection, update the CPU id
 184          * and CPU class bits.
 185          */
 186         if (cpu_is_omap3630()) {
 187                 cpu_name = "OMAP3630";
 188         } else if (cpu_is_omap3517()) {
 189                 /* AM35xx devices */
 190                 cpu_name = (omap3_has_sgx()) ? "AM3517" : "AM3505";
 191         } else if (cpu_is_ti816x()) {
 192                 cpu_name = "TI816X";
 193         } else if (cpu_is_am335x()) {
 194                 cpu_name =  "AM335X";
 195         } else if (cpu_is_ti814x()) {
 196                 cpu_name = "TI814X";
 197         } else if (omap3_has_iva() && omap3_has_sgx()) {
 198                 /* OMAP3430, OMAP3525, OMAP3515, OMAP3503 devices */
 199                 cpu_name = "OMAP3430/3530";
 200         } else if (omap3_has_iva()) {
 201                 cpu_name = "OMAP3525";
 202         } else if (omap3_has_sgx()) {
 203                 cpu_name = "OMAP3515";
 204         } else {
 205                 cpu_name = "OMAP3503";
 206         }
 207
 208         /* Print verbose information */
 209         pr_info("%s ES%s (", cpu_name, cpu_rev);
 210
 211         OMAP3_SHOW_FEATURE(l2cache);
 212         OMAP3_SHOW_FEATURE(iva);
 213         OMAP3_SHOW_FEATURE(sgx);
 214         OMAP3_SHOW_FEATURE(neon);
 215         OMAP3_SHOW_FEATURE(isp);
 216         OMAP3_SHOW_FEATURE(192mhz_clk);
 217
 218         printk(")\n");
 219 }
 220
 221 #define OMAP3_CHECK_FEATURE(status,feat)                                \
 222         if (((status & OMAP3_ ##feat## _MASK)                           \
 223                 >> OMAP3_ ##feat## _SHIFT) != FEAT_ ##feat## _NONE) {   \
 224                 omap_features |= OMAP3_HAS_ ##feat;                     \
 225         }
 226
 227 void __init omap3xxx_check_features(void)
 228 {
 229         u32 status;
 230
 231         omap_features = 0;
 232
 233         status = omap_ctrl_readl(OMAP3_CONTROL_OMAP_STATUS);
 234
 235         OMAP3_CHECK_FEATURE(status, L2CACHE);
 236         OMAP3_CHECK_FEATURE(status, IVA);
 237         OMAP3_CHECK_FEATURE(status, SGX);
 238         OMAP3_CHECK_FEATURE(status, NEON);
 239         OMAP3_CHECK_FEATURE(status, ISP);
 240         if (cpu_is_omap3630())
 241                 omap_features |= OMAP3_HAS_192MHZ_CLK;
 242         if (cpu_is_omap3430() || cpu_is_omap3630())
 243                 omap_features |= OMAP3_HAS_IO_WAKEUP;
 244         if (cpu_is_omap3630() || omap_rev() == OMAP3430_REV_ES3_1 ||
 245             omap_rev() == OMAP3430_REV_ES3_1_2)
 246                 omap_features |= OMAP3_HAS_IO_CHAIN_CTRL;
 247
 248         omap_features |= OMAP3_HAS_SDRC;
 249
 250         /*
 251          * TODO: Get additional info (where applicable)
 252          *       e.g. Size of L2 cache.
 253          */
 254
 255         omap3_cpuinfo();
 256 }
 257
 258 void __init omap4xxx_check_features(void)
 259 {
 260         u32 si_type;
 261
 262         if (cpu_is_omap443x())
 263                 omap_features |= OMAP4_HAS_MPU_1GHZ;
 264
 265
 266         if (cpu_is_omap446x()) {
 267                 si_type =
 268                         read_tap_reg(OMAP4_CTRL_MODULE_CORE_STD_FUSE_PROD_ID_1);
 269                 switch ((si_type & (3 << 16)) >> 16) {
 270                 case 2:
 271                         /* High performance device */
 272                         omap_features |= OMAP4_HAS_MPU_1_5GHZ;
 273                         break;
 274                 case 1:
 275                 default:
 276                         /* Standard device */
 277                         omap_features |= OMAP4_HAS_MPU_1_2GHZ;
 278                         break;
 279                 }
 280         }
 281 }
 282
 283 void __init ti81xx_check_features(void)
 284 {
 285         omap_features = OMAP3_HAS_NEON;
 286         omap3_cpuinfo();
 287 }
 288
 289 void __init omap3xxx_check_revision(void)
 290 {
 291         u32 cpuid, idcode;
 292         u16 hawkeye;
 293         u8 rev;
 294
 295         /*
 296          * We cannot access revision registers on ES1.0.
 297          * If the processor type is Cortex-A8 and the revision is 0x0
 298          * it means its Cortex r0p0 which is 3430 ES1.0.
 299          */
 300         cpuid = read_cpuid(CPUID_ID);
 301         if ((((cpuid >> 4) & 0xfff) == 0xc08) && ((cpuid & 0xf) == 0x0)) {
 302                 omap_revision = OMAP3430_REV_ES1_0;
 303                 cpu_rev = "1.0";
 304                 return;
 305         }
 306
 307         /*
 308          * Detection for 34xx ES2.0 and above can be done with just
 309          * hawkeye and rev. See TRM 1.5.2 Device Identification.
 310          * Note that rev does not map directly to our defined processor
 311          * revision numbers as ES1.0 uses value 0.
 312          */
 313         idcode = read_tap_reg(OMAP_TAP_IDCODE);
 314         hawkeye = (idcode >> 12) & 0xffff;
 315         rev = (idcode >> 28) & 0xff;
 316
 317         switch (hawkeye) {
 318         case 0xb7ae:
 319                 /* Handle 34xx/35xx devices */
 320                 switch (rev) {
 321                 case 0: /* Take care of early samples */
 322                 case 1:
 323                         omap_revision = OMAP3430_REV_ES2_0;
 324                         cpu_rev = "2.0";
 325                         break;
 326                 case 2:
 327                         omap_revision = OMAP3430_REV_ES2_1;
 328                         cpu_rev = "2.1";
 329                         break;
 330                 case 3:
 331                         omap_revision = OMAP3430_REV_ES3_0;
 332                         cpu_rev = "3.0";
 333                         break;
 334                 case 4:
 335                         omap_revision = OMAP3430_REV_ES3_1;
 336                         cpu_rev = "3.1";
 337                         break;
 338                 case 7:
 339                 /* FALLTHROUGH */
 340                 default:
 341                         /* Use the latest known revision as default */
 342                         omap_revision = OMAP3430_REV_ES3_1_2;
 343                         cpu_rev = "3.1.2";
 344                 }
 345                 break;
 346         case 0xb868:
 347                 /*
 348                  * Handle OMAP/AM 3505/3517 devices
 349                  *
 350                  * Set the device to be OMAP3517 here. Actual device
 351                  * is identified later based on the features.
 352                  */
 353                 switch (rev) {
 354                 case 0:
 355                         omap_revision = OMAP3517_REV_ES1_0;
 356                         cpu_rev = "1.0";
 357                         break;
 358                 case 1:
 359                 /* FALLTHROUGH */
 360                 default:
 361                         omap_revision = OMAP3517_REV_ES1_1;
 362                         cpu_rev = "1.1";
 363                 }
 364                 break;
 365         case 0xb891:
 366                 /* Handle 36xx devices */
 367
 368                 switch(rev) {
 369                 case 0: /* Take care of early samples */
 370                         omap_revision = OMAP3630_REV_ES1_0;
 371                         cpu_rev = "1.0";
 372                         break;
 373                 case 1:
 374                         omap_revision = OMAP3630_REV_ES1_1;
 375                         cpu_rev = "1.1";
 376                         break;
 377                 case 2:
 378                 /* FALLTHROUGH */
 379                 default:
 380                         omap_revision = OMAP3630_REV_ES1_2;
 381                         cpu_rev = "1.2";
 382                 }
 383                 break;
 384         case 0xb81e:
 385                 switch (rev) {
 386                 case 0:
 387                         omap_revision = TI8168_REV_ES1_0;
 388                         cpu_rev = "1.0";
 389                         break;
 390                 case 1:
 391                 /* FALLTHROUGH */
 392                 default:
 393                         omap_revision = TI8168_REV_ES1_1;
 394                         cpu_rev = "1.1";
 395                         break;
 396                 }
 397                 break;
 398         case 0xb944:
 399                 omap_revision = AM335X_REV_ES1_0;
 400                 cpu_rev = "1.0";
 401                 break;
 402         case 0xb8f2:
 403                 switch (rev) {
 404                 case 0:
 405                 /* FALLTHROUGH */
 406                 case 1:
 407                         omap_revision = TI8148_REV_ES1_0;
 408                         cpu_rev = "1.0";
 409                         break;
 410                 case 2:
 411                         omap_revision = TI8148_REV_ES2_0;
 412                         cpu_rev = "2.0";
 413                         break;
 414                 case 3:
 415                 /* FALLTHROUGH */
 416                 default:
 417                         omap_revision = TI8148_REV_ES2_1;
 418                         cpu_rev = "2.1";
 419                         break;
 420                 }
 421                 break;
 422         default:
 423                 /* Unknown default to latest silicon rev as default */
 424                 omap_revision = OMAP3630_REV_ES1_2;
 425                 cpu_rev = "1.2";
 426                 pr_warn("Warning: unknown chip type; assuming OMAP3630ES1.2\n");
 427         }
 428 }
 429
 430 void __init omap4xxx_check_revision(void)
 431 {
 432         u32 idcode;
 433         u16 hawkeye;
 434         u8 rev;
 435
 436         /*
 437          * The IC rev detection is done with hawkeye and rev.
 438          * Note that rev does not map directly to defined processor
 439          * revision numbers as ES1.0 uses value 0.
 440          */
 441         idcode = read_tap_reg(OMAP_TAP_IDCODE);
 442         hawkeye = (idcode >> 12) & 0xffff;
 443         rev = (idcode >> 28) & 0xf;
 444
 445         /*
 446          * Few initial 4430 ES2.0 samples IDCODE is same as ES1.0
 447          * Use ARM register to detect the correct ES version
 448          */
 449         if (!rev && (hawkeye != 0xb94e) && (hawkeye != 0xb975)) {
 450                 idcode = read_cpuid(CPUID_ID);
 451                 rev = (idcode & 0xf) - 1;
 452         }
 453
 454         switch (hawkeye) {
 455         case 0xb852:
 456                 switch (rev) {
 457                 case 0:
 458                         omap_revision = OMAP4430_REV_ES1_0;
 459                         break;
 460                 case 1:
 461                 default:
 462                         omap_revision = OMAP4430_REV_ES2_0;
 463                 }
 464                 break;
 465         case 0xb95c:
 466                 switch (rev) {
 467                 case 3:
 468                         omap_revision = OMAP4430_REV_ES2_1;
 469                         break;
 470                 case 4:
 471                         omap_revision = OMAP4430_REV_ES2_2;
 472                         break;
 473                 case 6:
 474                 default:
 475                         omap_revision = OMAP4430_REV_ES2_3;
 476                 }
 477                 break;
 478         case 0xb94e:
 479                 switch (rev) {
 480                 case 0:
 481                 default:
 482                         omap_revision = OMAP4460_REV_ES1_0;
 483                         break;
 484                 }
 485                 break;
 486         case 0xb975:
 487                 switch (rev) {
 488                 case 0:
 489                 default:
 490                         omap_revision = OMAP4470_REV_ES1_0;
 491                         break;
 492                 }
 493                 break;
 494         default:
 495                 /* Unknown default to latest silicon rev as default */
 496                 omap_revision = OMAP4430_REV_ES2_3;
 497         }
 498
 499         pr_info("OMAP%04x ES%d.%d\n", omap_rev() >> 16,
 500                 ((omap_rev() >> 12) & 0xf), ((omap_rev() >> 8) & 0xf));
 501 }
 502
 503 /*
 504  * Set up things for map_io and processor detection later on. Gets called
 505  * pretty much first thing from board init. For multi-omap, this gets
 506  * cpu_is_omapxxxx() working accurately enough for map_io. Then we'll try to
 507  * detect the exact revision later on in omap2_detect_revision() once map_io
 508  * is done.
 509  */
 510 void __init omap2_set_globals_tap(struct omap_globals *omap2_globals)
 511 {
 512         omap_revision = omap2_globals->class;
 513         tap_base = omap2_globals->tap;
 514
 515         if (cpu_is_omap34xx())
 516                 tap_prod_id = 0x0210;
 517         else
 518                 tap_prod_id = 0x0208;
 519 }