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 } 562