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 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/control.h>
  26 #include <plat/cpu.h>
  27
  28 #include <mach/id.h>
  29
  30 static struct omap_chip_id omap_chip;
  31 static unsigned int omap_revision;
  32
  33 u32 omap3_features;
  34
  35 unsigned int omap_rev(void)
  36 {
  37         return omap_revision;
  38 }
  39 EXPORT_SYMBOL(omap_rev);
  40
  41 /**
  42  * omap_chip_is - test whether currently running OMAP matches a chip type
  43  * @oc: omap_chip_t to test against
  44  *
  45  * Test whether the currently-running OMAP chip matches the supplied
  46  * chip type 'oc'.  Returns 1 upon a match; 0 upon failure.
  47  */
  48 int omap_chip_is(struct omap_chip_id oci)
  49 {
  50         return (oci.oc & omap_chip.oc) ? 1 : 0;
  51 }
  52 EXPORT_SYMBOL(omap_chip_is);
  53
  54 int omap_type(void)
  55 {
  56         u32 val = 0;
  57
  58         if (cpu_is_omap24xx()) {
  59                 val = omap_ctrl_readl(OMAP24XX_CONTROL_STATUS);
  60         } else if (cpu_is_omap34xx()) {
  61                 val = omap_ctrl_readl(OMAP343X_CONTROL_STATUS);
  62         } else if (cpu_is_omap44xx()) {
  63                 val = omap_ctrl_readl(OMAP44XX_CONTROL_STATUS);
  64         } else {
  65                 pr_err("Cannot detect omap type!\n");
  66                 goto out;
  67         }
  68
  69         val &= OMAP2_DEVICETYPE_MASK;
  70         val >>= 8;
  71
  72 out:
  73         return val;
  74 }
  75 EXPORT_SYMBOL(omap_type);
  76
  77
  78 /*----------------------------------------------------------------------------*/
  79
  80 #define OMAP_TAP_IDCODE         0x0204
  81 #define OMAP_TAP_DIE_ID_0       0x0218
  82 #define OMAP_TAP_DIE_ID_1       0x021C
  83 #define OMAP_TAP_DIE_ID_2       0x0220
  84 #define OMAP_TAP_DIE_ID_3       0x0224
  85
  86 #define read_tap_reg(reg)       __raw_readl(tap_base  + (reg))
  87
  88 struct omap_id {
  89         u16     hawkeye;        /* Silicon type (Hawkeye id) */
  90         u8      dev;            /* Device type from production_id reg */
  91         u32     type;           /* Combined type id copied to omap_revision */
  92 };
  93
  94 /* Register values to detect the OMAP version */
  95 static struct omap_id omap_ids[] __initdata = {
  96         { .hawkeye = 0xb5d9, .dev = 0x0, .type = 0x24200024 },
  97         { .hawkeye = 0xb5d9, .dev = 0x1, .type = 0x24201024 },
  98         { .hawkeye = 0xb5d9, .dev = 0x2, .type = 0x24202024 },
  99         { .hawkeye = 0xb5d9, .dev = 0x4, .type = 0x24220024 },
 100         { .hawkeye = 0xb5d9, .dev = 0x8, .type = 0x24230024 },
 101         { .hawkeye = 0xb68a, .dev = 0x0, .type = 0x24300024 },
 102 };
 103
 104 static void __iomem *tap_base;
 105 static u16 tap_prod_id;
 106
 107 void omap_get_die_id(struct omap_die_id *odi)
 108 {
 109         odi->id_0 = read_tap_reg(OMAP_TAP_DIE_ID_0);
 110         odi->id_1 = read_tap_reg(OMAP_TAP_DIE_ID_1);
 111         odi->id_2 = read_tap_reg(OMAP_TAP_DIE_ID_2);
 112         odi->id_3 = read_tap_reg(OMAP_TAP_DIE_ID_3);
 113 }
 114
 115 static void __init omap24xx_check_revision(void)
 116 {
 117         int i, j;
 118         u32 idcode, prod_id;
 119         u16 hawkeye;
 120         u8  dev_type, rev;
 121
 122         idcode = read_tap_reg(OMAP_TAP_IDCODE);
 123         prod_id = read_tap_reg(tap_prod_id);
 124         hawkeye = (idcode >> 12) & 0xffff;
 125         rev = (idcode >> 28) & 0x0f;
 126         dev_type = (prod_id >> 16) & 0x0f;
 127
 128         pr_debug("OMAP_TAP_IDCODE 0x%08x REV %i HAWKEYE 0x%04x MANF %03x\n",
 129                  idcode, rev, hawkeye, (idcode >> 1) & 0x7ff);
 130         pr_debug("OMAP_TAP_DIE_ID_0: 0x%08x\n",
 131                  read_tap_reg(OMAP_TAP_DIE_ID_0));
 132         pr_debug("OMAP_TAP_DIE_ID_1: 0x%08x DEV_REV: %i\n",
 133                  read_tap_reg(OMAP_TAP_DIE_ID_1),
 134                  (read_tap_reg(OMAP_TAP_DIE_ID_1) >> 28) & 0xf);
 135         pr_debug("OMAP_TAP_DIE_ID_2: 0x%08x\n",
 136                  read_tap_reg(OMAP_TAP_DIE_ID_2));
 137         pr_debug("OMAP_TAP_DIE_ID_3: 0x%08x\n",
 138                  read_tap_reg(OMAP_TAP_DIE_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_CHECK_FEATURE(status,feat)                                \
 172         if (((status & OMAP3_ ##feat## _MASK)                           \
 173                 >> OMAP3_ ##feat## _SHIFT) != FEAT_ ##feat## _NONE) {   \
 174                 omap3_features |= OMAP3_HAS_ ##feat;                    \
 175         }
 176
 177 static void __init omap3_check_features(void)
 178 {
 179         u32 status;
 180
 181         omap3_features = 0;
 182
 183         status = omap_ctrl_readl(OMAP3_CONTROL_OMAP_STATUS);
 184
 185         OMAP3_CHECK_FEATURE(status, L2CACHE);
 186         OMAP3_CHECK_FEATURE(status, IVA);
 187         OMAP3_CHECK_FEATURE(status, SGX);
 188         OMAP3_CHECK_FEATURE(status, NEON);
 189         OMAP3_CHECK_FEATURE(status, ISP);
 190         if (cpu_is_omap3630())
 191                 omap3_features |= OMAP3_HAS_192MHZ_CLK;
 192         if (!cpu_is_omap3505() && !cpu_is_omap3517())
 193                 omap3_features |= OMAP3_HAS_IO_WAKEUP;
 194
 195         /*
 196          * TODO: Get additional info (where applicable)
 197          *       e.g. Size of L2 cache.
 198          */
 199 }
 200
 201 static void __init omap3_check_revision(void)
 202 {
 203         u32 cpuid, idcode;
 204         u16 hawkeye;
 205         u8 rev;
 206
 207         omap_chip.oc = CHIP_IS_OMAP3430;
 208
 209         /*
 210          * We cannot access revision registers on ES1.0.
 211          * If the processor type is Cortex-A8 and the revision is 0x0
 212          * it means its Cortex r0p0 which is 3430 ES1.0.
 213          */
 214         cpuid = read_cpuid(CPUID_ID);
 215         if ((((cpuid >> 4) & 0xfff) == 0xc08) && ((cpuid & 0xf) == 0x0)) {
 216                 omap_revision = OMAP3430_REV_ES1_0;
 217                 omap_chip.oc |= CHIP_IS_OMAP3430ES1;
 218                 return;
 219         }
 220
 221         /*
 222          * Detection for 34xx ES2.0 and above can be done with just
 223          * hawkeye and rev. See TRM 1.5.2 Device Identification.
 224          * Note that rev does not map directly to our defined processor
 225          * revision numbers as ES1.0 uses value 0.
 226          */
 227         idcode = read_tap_reg(OMAP_TAP_IDCODE);
 228         hawkeye = (idcode >> 12) & 0xffff;
 229         rev = (idcode >> 28) & 0xff;
 230
 231         switch (hawkeye) {
 232         case 0xb7ae:
 233                 /* Handle 34xx/35xx devices */
 234                 switch (rev) {
 235                 case 0: /* Take care of early samples */
 236                 case 1:
 237                         omap_revision = OMAP3430_REV_ES2_0;
 238                         omap_chip.oc |= CHIP_IS_OMAP3430ES2;
 239                         break;
 240                 case 2:
 241                         omap_revision = OMAP3430_REV_ES2_1;
 242                         omap_chip.oc |= CHIP_IS_OMAP3430ES2;
 243                         break;
 244                 case 3:
 245                         omap_revision = OMAP3430_REV_ES3_0;
 246                         omap_chip.oc |= CHIP_IS_OMAP3430ES3_0;
 247                         break;
 248                 case 4:
 249                         omap_revision = OMAP3430_REV_ES3_1;
 250                         omap_chip.oc |= CHIP_IS_OMAP3430ES3_1;
 251                         break;
 252                 case 7:
 253                 /* FALLTHROUGH */
 254                 default:
 255                         /* Use the latest known revision as default */
 256                         omap_revision = OMAP3430_REV_ES3_1_2;
 257
 258                         /* REVISIT: Add CHIP_IS_OMAP3430ES3_1_2? */
 259                         omap_chip.oc |= CHIP_IS_OMAP3430ES3_1;
 260                 }
 261                 break;
 262         case 0xb868:
 263                 /* Handle OMAP35xx/AM35xx devices
 264                  *
 265                  * Set the device to be OMAP3505 here. Actual device
 266                  * is identified later based on the features.
 267                  *
 268                  * REVISIT: AM3505/AM3517 should have their own CHIP_IS
 269                  */
 270                 omap_revision = OMAP3505_REV(rev);
 271                 omap_chip.oc |= CHIP_IS_OMAP3430ES3_1;
 272                 break;
 273         case 0xb891:
 274         /* FALLTHROUGH */
 275         default:
 276                 /* Unknown default to latest silicon rev as default*/
 277                 omap_revision = OMAP3630_REV_ES1_0;
 278                 omap_chip.oc |= CHIP_IS_OMAP3630ES1;
 279         }
 280 }
 281
 282 static void __init omap4_check_revision(void)
 283 {
 284         u32 idcode;
 285         u16 hawkeye;
 286         u8 rev;
 287         char *rev_name = "ES1.0";
 288
 289         /*
 290          * The IC rev detection is done with hawkeye and rev.
 291          * Note that rev does not map directly to defined processor
 292          * revision numbers as ES1.0 uses value 0.
 293          */
 294         idcode = read_tap_reg(OMAP_TAP_IDCODE);
 295         hawkeye = (idcode >> 12) & 0xffff;
 296         rev = (idcode >> 28) & 0xff;
 297
 298         if ((hawkeye == 0xb852) && (rev == 0x0)) {
 299                 omap_revision = OMAP4430_REV_ES1_0;
 300                 omap_chip.oc |= CHIP_IS_OMAP4430ES1;
 301                 pr_info("OMAP%04x %s\n", omap_rev() >> 16, rev_name);
 302                 return;
 303         }
 304
 305         pr_err("Unknown OMAP4 CPU id\n");
 306 }
 307
 308 #define OMAP3_SHOW_FEATURE(feat)                \
 309         if (omap3_has_ ##feat())                \
 310                 printk(#feat" ");
 311
 312 static void __init omap3_cpuinfo(void)
 313 {
 314         u8 rev = GET_OMAP_REVISION();
 315         char cpu_name[16], cpu_rev[16];
 316
 317         /* OMAP3430 and OMAP3530 are assumed to be same.
 318          *
 319          * OMAP3525, OMAP3515 and OMAP3503 can be detected only based
 320          * on available features. Upon detection, update the CPU id
 321          * and CPU class bits.
 322          */
 323         if (cpu_is_omap3630()) {
 324                 strcpy(cpu_name, "OMAP3630");
 325         } else if (cpu_is_omap3505()) {
 326                 /*
 327                  * AM35xx devices
 328                  */
 329                 if (omap3_has_sgx()) {
 330                         omap_revision = OMAP3517_REV(rev);
 331                         strcpy(cpu_name, "AM3517");
 332                 } else {
 333                         /* Already set in omap3_check_revision() */
 334                         strcpy(cpu_name, "AM3505");
 335                 }
 336         } else if (omap3_has_iva() && omap3_has_sgx()) {
 337                 /* OMAP3430, OMAP3525, OMAP3515, OMAP3503 devices */
 338                 strcpy(cpu_name, "OMAP3430/3530");
 339         } else if (omap3_has_iva()) {
 340                 omap_revision = OMAP3525_REV(rev);
 341                 strcpy(cpu_name, "OMAP3525");
 342         } else if (omap3_has_sgx()) {
 343                 omap_revision = OMAP3515_REV(rev);
 344                 strcpy(cpu_name, "OMAP3515");
 345         } else {
 346                 omap_revision = OMAP3503_REV(rev);
 347                 strcpy(cpu_name, "OMAP3503");
 348         }
 349
 350         switch (rev) {
 351         case OMAP_REVBITS_00:
 352                 strcpy(cpu_rev, "1.0");
 353                 break;
 354         case OMAP_REVBITS_10:
 355                 strcpy(cpu_rev, "2.0");
 356                 break;
 357         case OMAP_REVBITS_20:
 358                 strcpy(cpu_rev, "2.1");
 359                 break;
 360         case OMAP_REVBITS_30:
 361                 strcpy(cpu_rev, "3.0");
 362                 break;
 363         case OMAP_REVBITS_40:
 364         /* FALLTHROUGH */
 365         default:
 366                 /* Use the latest known revision as default */
 367                 strcpy(cpu_rev, "3.1");
 368         }
 369
 370         /* Print verbose information */
 371         pr_info("%s ES%s (", cpu_name, cpu_rev);
 372
 373         OMAP3_SHOW_FEATURE(l2cache);
 374         OMAP3_SHOW_FEATURE(iva);
 375         OMAP3_SHOW_FEATURE(sgx);
 376         OMAP3_SHOW_FEATURE(neon);
 377         OMAP3_SHOW_FEATURE(isp);
 378         OMAP3_SHOW_FEATURE(192mhz_clk);
 379
 380         printk(")\n");
 381 }
 382
 383 /*
 384  * Try to detect the exact revision of the omap we're running on
 385  */
 386 void __init omap2_check_revision(void)
 387 {
 388         /*
 389          * At this point we have an idea about the processor revision set
 390          * earlier with omap2_set_globals_tap().
 391          */
 392         if (cpu_is_omap24xx()) {
 393                 omap24xx_check_revision();
 394         } else if (cpu_is_omap34xx()) {
 395                 omap3_check_revision();
 396                 omap3_check_features();
 397                 omap3_cpuinfo();
 398                 return;
 399         } else if (cpu_is_omap44xx()) {
 400                 omap4_check_revision();
 401                 return;
 402         } else {
 403                 pr_err("OMAP revision unknown, please fix!\n");
 404         }
 405
 406         /*
 407          * OK, now we know the exact revision. Initialize omap_chip bits
 408          * for powerdowmain and clockdomain code.
 409          */
 410         if (cpu_is_omap243x()) {
 411                 /* Currently only supports 2430ES2.1 and 2430-all */
 412                 omap_chip.oc |= CHIP_IS_OMAP2430;
 413                 return;
 414         } else if (cpu_is_omap242x()) {
 415                 /* Currently only supports 2420ES2.1.1 and 2420-all */
 416                 omap_chip.oc |= CHIP_IS_OMAP2420;
 417                 return;
 418         }
 419
 420         pr_err("Uninitialized omap_chip, please fix!\n");
 421 }
 422
 423 /*
 424  * Set up things for map_io and processor detection later on. Gets called
 425  * pretty much first thing from board init. For multi-omap, this gets
 426  * cpu_is_omapxxxx() working accurately enough for map_io. Then we'll try to
 427  * detect the exact revision later on in omap2_detect_revision() once map_io
 428  * is done.
 429  */
 430 void __init omap2_set_globals_tap(struct omap_globals *omap2_globals)
 431 {
 432         omap_revision = omap2_globals->class;
 433         tap_base = omap2_globals->tap;
 434
 435         if (cpu_is_omap34xx())
 436                 tap_prod_id = 0x0210;
 437         else
 438                 tap_prod_id = 0x0208;
 439 }