Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/arm/nvidia/tegra_efuse.c
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1 /*- 2 * Copyright (c) 2015 Michal Meloun 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 #include <sys/cdefs.h> 28 __FBSDID("$FreeBSD$"); 29 30 #include <sys/param.h> 31 #include <sys/systm.h> 32 #include <sys/bus.h> 33 #include <sys/clock.h> 34 #include <sys/kernel.h> 35 #include <sys/limits.h> 36 #include <sys/lock.h> 37 #include <sys/mutex.h> 38 #include <sys/module.h> 39 #include <sys/resource.h> 40 #include <sys/rman.h> 41 42 #include <machine/bus.h> 43 #include <machine/resource.h> 44 45 #include <dev/extres/clk/clk.h> 46 #include <dev/extres/hwreset/hwreset.h> 47 #include <dev/ofw/ofw_bus.h> 48 #include <dev/ofw/ofw_bus_subr.h> 49 50 #include <arm/nvidia/tegra_efuse.h> 51 52 #define FUSES_START 0x100 53 #define RD4(_sc, _r) bus_read_4((_sc)->mem_res, (FUSES_START + (_r))) 54 55 struct efuse_soc; 56 struct tegra_efuse_softc { 57 device_t dev; 58 struct resource *mem_res; 59 60 struct efuse_soc *soc; 61 clk_t clk; 62 hwreset_t reset; 63 }; 64 65 struct tegra_efuse_softc *dev_sc; 66 struct tegra_sku_info tegra_sku_info; 67 static char *tegra_rev_name[] = { 68 [TEGRA_REVISION_UNKNOWN] = "unknown", 69 [TEGRA_REVISION_A01] = "A01", 70 [TEGRA_REVISION_A02] = "A02", 71 [TEGRA_REVISION_A03] = "A03", 72 [TEGRA_REVISION_A03p] = "A03 prime", 73 [TEGRA_REVISION_A04] = "A04", 74 }; 75 76 struct efuse_soc { 77 void (*init)(struct tegra_efuse_softc *sc, 78 struct tegra_sku_info *sku); 79 }; 80 81 static void tegra124_init(struct tegra_efuse_softc *sc, 82 struct tegra_sku_info *sku); 83 struct efuse_soc tegra124_efuse_soc = { 84 .init = tegra124_init, 85 }; 86 87 static void tegra210_init(struct tegra_efuse_softc *sc, 88 struct tegra_sku_info *sku); 89 struct efuse_soc tegra210_efuse_soc = { 90 .init = tegra210_init, 91 }; 92 93 static struct ofw_compat_data compat_data[] = { 94 {"nvidia,tegra124-efuse", (intptr_t)&tegra124_efuse_soc}, 95 {"nvidia,tegra210-efuse", (intptr_t)&tegra210_efuse_soc}, 96 {NULL, 0} 97 }; 98 99 /* ---------------------- Tegra 124 specific code & data --------------- */ 100 #define TEGRA124_CPU_PROCESS_CORNERS 2 101 #define TEGRA124_GPU_PROCESS_CORNERS 2 102 #define TEGRA124_SOC_PROCESS_CORNERS 2 103 104 #define TEGRA124_FUSE_SKU_INFO 0x10 105 #define TEGRA124_FUSE_CPU_SPEEDO_0 0x14 106 #define TEGRA124_FUSE_CPU_IDDQ 0x18 107 #define TEGRA124_FUSE_FT_REV 0x28 108 #define TEGRA124_FUSE_CPU_SPEEDO_1 0x2c 109 #define TEGRA124_FUSE_CPU_SPEEDO_2 0x30 110 #define TEGRA124_FUSE_SOC_SPEEDO_0 0x34 111 #define TEGRA124_FUSE_SOC_SPEEDO_1 0x38 112 #define TEGRA124_FUSE_SOC_SPEEDO_2 0x3c 113 #define TEGRA124_FUSE_SOC_IDDQ 0x40 114 #define TEGRA124_FUSE_GPU_IDDQ 0x128 115 116 enum { 117 TEGRA124_THRESHOLD_INDEX_0, 118 TEGRA124_THRESHOLD_INDEX_1, 119 TEGRA124_THRESHOLD_INDEX_COUNT, 120 }; 121 122 static uint32_t tegra124_cpu_process_speedos[][TEGRA124_CPU_PROCESS_CORNERS] = 123 { 124 {2190, UINT_MAX}, 125 {0, UINT_MAX}, 126 }; 127 128 static uint32_t tegra124_gpu_process_speedos[][TEGRA124_GPU_PROCESS_CORNERS] = 129 { 130 {1965, UINT_MAX}, 131 {0, UINT_MAX}, 132 }; 133 134 static uint32_t tegra124_soc_process_speedos[][TEGRA124_SOC_PROCESS_CORNERS] = 135 { 136 {2101, UINT_MAX}, 137 {0, UINT_MAX}, 138 }; 139 140 141 static void 142 tegra124_rev_sku_to_speedo_ids(struct tegra_efuse_softc *sc, 143 struct tegra_sku_info *sku, int *threshold) 144 { 145 146 /* Set default */ 147 sku->cpu_speedo_id = 0; 148 sku->soc_speedo_id = 0; 149 sku->gpu_speedo_id = 0; 150 *threshold = TEGRA124_THRESHOLD_INDEX_0; 151 152 switch (sku->sku_id) { 153 case 0x00: /* Eng sku */ 154 case 0x0F: 155 case 0x23: 156 /* Using the default */ 157 break; 158 case 0x83: 159 sku->cpu_speedo_id = 2; 160 break; 161 162 case 0x1F: 163 case 0x87: 164 case 0x27: 165 sku->cpu_speedo_id = 2; 166 sku->soc_speedo_id = 0; 167 sku->gpu_speedo_id = 1; 168 *threshold = TEGRA124_THRESHOLD_INDEX_0; 169 break; 170 case 0x81: 171 case 0x21: 172 case 0x07: 173 sku->cpu_speedo_id = 1; 174 sku->soc_speedo_id = 1; 175 sku->gpu_speedo_id = 1; 176 *threshold = TEGRA124_THRESHOLD_INDEX_1; 177 break; 178 case 0x49: 179 case 0x4A: 180 case 0x48: 181 sku->cpu_speedo_id = 4; 182 sku->soc_speedo_id = 2; 183 sku->gpu_speedo_id = 3; 184 *threshold = TEGRA124_THRESHOLD_INDEX_1; 185 break; 186 default: 187 device_printf(sc->dev, " Unknown SKU ID %d\n", sku->sku_id); 188 break; 189 } 190 } 191 192 static void 193 tegra124_init(struct tegra_efuse_softc *sc, struct tegra_sku_info *sku) 194 { 195 int i, threshold; 196 197 sku->sku_id = RD4(sc, TEGRA124_FUSE_SKU_INFO); 198 sku->soc_iddq_value = RD4(sc, TEGRA124_FUSE_SOC_IDDQ); 199 sku->cpu_iddq_value = RD4(sc, TEGRA124_FUSE_CPU_IDDQ); 200 sku->gpu_iddq_value = RD4(sc, TEGRA124_FUSE_GPU_IDDQ); 201 sku->soc_speedo_value = RD4(sc, TEGRA124_FUSE_SOC_SPEEDO_0); 202 sku->cpu_speedo_value = RD4(sc, TEGRA124_FUSE_CPU_SPEEDO_0); 203 sku->gpu_speedo_value = RD4(sc, TEGRA124_FUSE_CPU_SPEEDO_2); 204 205 if (sku->cpu_speedo_value == 0) { 206 device_printf(sc->dev, "CPU Speedo value is not fused.\n"); 207 return; 208 } 209 210 tegra124_rev_sku_to_speedo_ids(sc, sku, &threshold); 211 212 for (i = 0; i < TEGRA124_SOC_PROCESS_CORNERS; i++) { 213 if (sku->soc_speedo_value < 214 tegra124_soc_process_speedos[threshold][i]) 215 break; 216 } 217 sku->soc_process_id = i; 218 219 for (i = 0; i < TEGRA124_CPU_PROCESS_CORNERS; i++) { 220 if (sku->cpu_speedo_value < 221 tegra124_cpu_process_speedos[threshold][i]) 222 break; 223 } 224 sku->cpu_process_id = i; 225 226 for (i = 0; i < TEGRA124_GPU_PROCESS_CORNERS; i++) { 227 if (sku->gpu_speedo_value < 228 tegra124_gpu_process_speedos[threshold][i]) 229 break; 230 } 231 sku->gpu_process_id = i; 232 233 } 234 /* ----------------- End of Tegra 124 specific code & data --------------- */ 235 236 /* -------------------- Tegra 201 specific code & data ------------------- */ 237 #define TEGRA210_CPU_PROCESS_CORNERS 2 238 #define TEGRA210_GPU_PROCESS_CORNERS 2 239 #define TEGRA210_SOC_PROCESS_CORNERS 3 240 241 #define TEGRA210_FUSE_SKU_INFO 0x010 242 #define TEGRA210_FUSE_CPU_SPEEDO_0 0x014 243 #define TEGRA210_FUSE_CPU_IDDQ 0x018 244 #define TEGRA210_FUSE_FT_REV 0x028 245 #define TEGRA210_FUSE_CPU_SPEEDO_1 0x02c 246 #define TEGRA210_FUSE_CPU_SPEEDO_2 0x030 247 #define TEGRA210_FUSE_SOC_SPEEDO_0 0x034 248 #define TEGRA210_FUSE_SOC_SPEEDO_1 0x038 249 #define TEGRA210_FUSE_SOC_SPEEDO_2 0x03c 250 #define TEGRA210_FUSE_SOC_IDDQ 0x040 251 #define TEGRA210_FUSE_GPU_IDDQ 0x128 252 #define TEGRA210_FUSE_SPARE 0x270 253 254 enum { 255 TEGRA210_THRESHOLD_INDEX_0, 256 TEGRA210_THRESHOLD_INDEX_1, 257 TEGRA210_THRESHOLD_INDEX_COUNT, 258 }; 259 260 static uint32_t tegra210_cpu_process_speedos[][TEGRA210_CPU_PROCESS_CORNERS] = 261 { 262 {2119, UINT_MAX}, 263 {2119, UINT_MAX}, 264 }; 265 266 static uint32_t tegra210_gpu_process_speedos[][TEGRA210_GPU_PROCESS_CORNERS] = 267 { 268 {UINT_MAX, UINT_MAX}, 269 {UINT_MAX, UINT_MAX}, 270 }; 271 272 static uint32_t tegra210_soc_process_speedos[][TEGRA210_SOC_PROCESS_CORNERS] = 273 { 274 {1950, 2100, UINT_MAX}, 275 {1950, 2100, UINT_MAX}, 276 }; 277 278 static uint32_t 279 tegra210_get_speedo_revision(struct tegra_efuse_softc *sc) 280 { 281 uint32_t reg; 282 uint32_t val; 283 284 val = 0; 285 286 /* Revision i encoded in spare fields */ 287 reg = RD4(sc, TEGRA210_FUSE_SPARE + 2 * 4); 288 val |= (reg & 1) << 0; 289 reg = RD4(sc, TEGRA210_FUSE_SPARE + 3 * 4); 290 val |= (reg & 1) << 1; 291 reg = RD4(sc, TEGRA210_FUSE_SPARE + 4 * 4); 292 val |= (reg & 1) << 2; 293 294 return (val); 295 } 296 297 298 static void 299 tegra210_rev_sku_to_speedo_ids(struct tegra_efuse_softc *sc, 300 struct tegra_sku_info *sku, int speedo_rev, int *threshold) 301 { 302 303 /* Set defaults */ 304 sku->cpu_speedo_id = 0; 305 sku->soc_speedo_id = 0; 306 sku->gpu_speedo_id = 0; 307 *threshold = TEGRA210_THRESHOLD_INDEX_0; 308 309 switch (sku->sku_id) { 310 case 0x00: /* Eng sku */ 311 case 0x01: /* Eng sku */ 312 case 0x07: 313 case 0x17: 314 case 0x27: 315 /* Use defaults */ 316 if (speedo_rev >= 2) 317 sku->gpu_speedo_id = 1; 318 break; 319 case 0x13: 320 if (speedo_rev >= 2) 321 sku->gpu_speedo_id = 1; 322 sku->cpu_speedo_id = 1; 323 break; 324 325 default: 326 device_printf(sc->dev, " Unknown SKU ID %d\n", sku->sku_id); 327 break; 328 } 329 } 330 331 332 static void 333 tegra210_init(struct tegra_efuse_softc *sc, struct tegra_sku_info *sku) 334 { 335 int i, threshold, speedo_rev; 336 uint32_t cpu_speedo[3], soc_speedo[3]; 337 338 cpu_speedo[0] = RD4(sc, TEGRA210_FUSE_CPU_SPEEDO_0); 339 cpu_speedo[1] = RD4(sc, TEGRA210_FUSE_CPU_SPEEDO_1); 340 cpu_speedo[2] = RD4(sc, TEGRA210_FUSE_CPU_SPEEDO_2); 341 soc_speedo[0] = RD4(sc, TEGRA210_FUSE_SOC_SPEEDO_0); 342 soc_speedo[1] = RD4(sc, TEGRA210_FUSE_SOC_SPEEDO_1); 343 soc_speedo[2] = RD4(sc, TEGRA210_FUSE_SOC_SPEEDO_2); 344 345 346 sku->cpu_iddq_value = RD4(sc, TEGRA210_FUSE_CPU_IDDQ); 347 sku->soc_iddq_value = RD4(sc, TEGRA210_FUSE_SOC_IDDQ); 348 sku->gpu_iddq_value = RD4(sc, TEGRA210_FUSE_GPU_IDDQ); 349 350 speedo_rev = tegra210_get_speedo_revision(sc); 351 device_printf(sc->dev, " Speedo revision: %u\n", speedo_rev); 352 353 if (speedo_rev >= 3) { 354 sku->cpu_speedo_value = cpu_speedo[0]; 355 sku->gpu_speedo_value = cpu_speedo[2]; 356 sku->soc_speedo_value = soc_speedo[0]; 357 } else if (speedo_rev == 2) { 358 sku->cpu_speedo_value = 359 (-1938 + (1095 * cpu_speedo[0] / 100)) / 10; 360 sku->gpu_speedo_value = 361 (-1662 + (1082 * cpu_speedo[2] / 100)) / 10; 362 sku->soc_speedo_value = 363 ( -705 + (1037 * soc_speedo[0] / 100)) / 10; 364 } else { 365 sku->cpu_speedo_value = 2100; 366 sku->gpu_speedo_value = cpu_speedo[2] - 75; 367 sku->soc_speedo_value = 1900; 368 } 369 370 tegra210_rev_sku_to_speedo_ids(sc, sku, speedo_rev, &threshold); 371 372 for (i = 0; i < TEGRA210_SOC_PROCESS_CORNERS; i++) { 373 if (sku->soc_speedo_value < 374 tegra210_soc_process_speedos[threshold][i]) 375 break; 376 } 377 sku->soc_process_id = i; 378 379 for (i = 0; i < TEGRA210_CPU_PROCESS_CORNERS; i++) { 380 if (sku->cpu_speedo_value < 381 tegra210_cpu_process_speedos[threshold][i]) 382 break; 383 } 384 sku->cpu_process_id = i; 385 386 for (i = 0; i < TEGRA210_GPU_PROCESS_CORNERS; i++) { 387 if (sku->gpu_speedo_value < 388 tegra210_gpu_process_speedos[threshold][i]) 389 break; 390 } 391 sku->gpu_process_id = i; 392 393 } 394 395 /* ----------------- End of Tegra 210 specific code & data --------------- */ 396 397 398 uint32_t 399 tegra_fuse_read_4(int addr) { 400 if (dev_sc == NULL) 401 panic("tegra_fuse_read_4 called too early"); 402 return (RD4(dev_sc, addr)); 403 } 404 405 static void 406 tegra_efuse_dump_sku(void) 407 { 408 printf(" TEGRA SKU Info:\n"); 409 printf(" chip_id: %u\n", tegra_sku_info.chip_id); 410 printf(" sku_id: %u\n", tegra_sku_info.sku_id); 411 printf(" cpu_process_id: %u\n", tegra_sku_info.cpu_process_id); 412 printf(" cpu_speedo_id: %u\n", tegra_sku_info.cpu_speedo_id); 413 printf(" cpu_speedo_value: %u\n", tegra_sku_info.cpu_speedo_value); 414 printf(" cpu_iddq_value: %u\n", tegra_sku_info.cpu_iddq_value); 415 printf(" soc_process_id: %u\n", tegra_sku_info.soc_process_id); 416 printf(" soc_speedo_id: %u\n", tegra_sku_info.soc_speedo_id); 417 printf(" soc_speedo_value: %u\n", tegra_sku_info.soc_speedo_value); 418 printf(" soc_iddq_value: %u\n", tegra_sku_info.soc_iddq_value); 419 printf(" gpu_process_id: %u\n", tegra_sku_info.gpu_process_id); 420 printf(" gpu_speedo_id: %u\n", tegra_sku_info.gpu_speedo_id); 421 printf(" gpu_speedo_value: %u\n", tegra_sku_info.gpu_speedo_value); 422 printf(" gpu_iddq_value: %u\n", tegra_sku_info.gpu_iddq_value); 423 printf(" revision: %s\n", tegra_rev_name[tegra_sku_info.revision]); 424 } 425 426 static int 427 tegra_efuse_probe(device_t dev) 428 { 429 if (!ofw_bus_status_okay(dev)) 430 return (ENXIO); 431 432 if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0) 433 return (ENXIO); 434 435 return (BUS_PROBE_DEFAULT); 436 } 437 438 static int 439 tegra_efuse_attach(device_t dev) 440 { 441 int rv, rid; 442 struct tegra_efuse_softc *sc; 443 444 sc = device_get_softc(dev); 445 sc->dev = dev; 446 sc->soc = (struct efuse_soc *)ofw_bus_search_compatible(dev, 447 compat_data)->ocd_data; 448 449 /* Get the memory resource for the register mapping. */ 450 rid = 0; 451 sc->mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, 452 RF_ACTIVE); 453 if (sc->mem_res == NULL) { 454 device_printf(dev, "Cannot map registers.\n"); 455 rv = ENXIO; 456 goto fail; 457 } 458 459 /* OFW resources. */ 460 rv = clk_get_by_ofw_name(dev, 0, "fuse", &sc->clk); 461 if (rv != 0) { 462 device_printf(dev, "Cannot get fuse clock: %d\n", rv); 463 goto fail; 464 } 465 rv = clk_enable(sc->clk); 466 if (rv != 0) { 467 device_printf(dev, "Cannot enable clock: %d\n", rv); 468 goto fail; 469 } 470 rv = hwreset_get_by_ofw_name(sc->dev, 0, "fuse", &sc->reset); 471 if (rv != 0) { 472 device_printf(dev, "Cannot get fuse reset\n"); 473 goto fail; 474 } 475 rv = hwreset_deassert(sc->reset); 476 if (rv != 0) { 477 device_printf(sc->dev, "Cannot clear reset\n"); 478 goto fail; 479 } 480 481 sc->soc->init(sc, &tegra_sku_info); 482 483 dev_sc = sc; 484 485 if (bootverbose) 486 tegra_efuse_dump_sku(); 487 return (bus_generic_attach(dev)); 488 489 fail: 490 dev_sc = NULL; 491 if (sc->clk != NULL) 492 clk_release(sc->clk); 493 if (sc->reset != NULL) 494 hwreset_release(sc->reset); 495 if (sc->mem_res != NULL) 496 bus_release_resource(dev, SYS_RES_MEMORY, 0, sc->mem_res); 497 498 return (rv); 499 } 500 501 static int 502 tegra_efuse_detach(device_t dev) 503 { 504 struct tegra_efuse_softc *sc; 505 506 sc = device_get_softc(dev); 507 dev_sc = NULL; 508 if (sc->clk != NULL) 509 clk_release(sc->clk); 510 if (sc->reset != NULL) 511 hwreset_release(sc->reset); 512 if (sc->mem_res != NULL) 513 bus_release_resource(dev, SYS_RES_MEMORY, 0, sc->mem_res); 514 515 return (bus_generic_detach(dev)); 516 } 517 518 static device_method_t tegra_efuse_methods[] = { 519 /* Device interface */ 520 DEVMETHOD(device_probe, tegra_efuse_probe), 521 DEVMETHOD(device_attach, tegra_efuse_attach), 522 DEVMETHOD(device_detach, tegra_efuse_detach), 523 524 DEVMETHOD_END 525 }; 526 527 static DEFINE_CLASS_0(efuse, tegra_efuse_driver, tegra_efuse_methods, 528 sizeof(struct tegra_efuse_softc)); 529 EARLY_DRIVER_MODULE(tegra_efuse, simplebus, tegra_efuse_driver, NULL, NULL, 530 BUS_PASS_TIMER);
Cache object: 0d5c62ca9201e791d828b141e8b049c0
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