1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright 2020 Michal Meloun <mmel@FreeBSD.org> 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28 #include <sys/cdefs.h> 29 __FBSDID("$FreeBSD$"); 30 31 #include <sys/param.h> 32 #include <sys/systm.h> 33 #include <sys/bus.h> 34 #include <sys/kernel.h> 35 #include <sys/module.h> 36 #include <sys/malloc.h> 37 #include <sys/mutex.h> 38 #include <sys/rman.h> 39 40 #include <machine/bus.h> 41 42 #include <dev/extres/clk/clk.h> 43 #include <dev/extres/hwreset/hwreset.h> 44 #include <dev/ofw/ofw_bus.h> 45 #include <dev/ofw/ofw_bus_subr.h> 46 #include <dev/psci/smccc.h> 47 48 #include <arm/nvidia/tegra_pmc.h> 49 50 #define PMC_CNTRL 0x000 51 #define PMC_CNTRL_SHUTDOWN_OE (1 << 22) 52 #define PMC_CNTRL_CPUPWRGOOD_SEL_MASK (0x3 << 20) 53 #define PMC_CNTRL_CPUPWRGOOD_SEL_SHIFT 20 54 #define PMC_CNTRL_CPUPWRGOOD_EN (1 << 19) 55 #define PMC_CNTRL_FUSE_OVERRIDE (1 << 18) 56 #define PMC_CNTRL_INTR_POLARITY (1 << 17) 57 #define PMC_CNTRL_CPU_PWRREQ_OE (1 << 16) 58 #define PMC_CNTRL_CPU_PWRREQ_POLARITY (1 << 15) 59 #define PMC_CNTRL_SIDE_EFFECT_LP0 (1 << 14) 60 #define PMC_CNTRL_AOINIT (1 << 13) 61 #define PMC_CNTRL_PWRGATE_DIS (1 << 12) 62 #define PMC_CNTRL_SYSCLK_OE (1 << 11) 63 #define PMC_CNTRL_SYSCLK_POLARITY (1 << 10) 64 #define PMC_CNTRL_PWRREQ_OE (1 << 9) 65 #define PMC_CNTRL_PWRREQ_POLARITY (1 << 8) 66 #define PMC_CNTRL_BLINK_EN (1 << 7) 67 #define PMC_CNTRL_GLITCHDET_DIS (1 << 6) 68 #define PMC_CNTRL_LATCHWAKE_EN (1 << 5) 69 #define PMC_CNTRL_MAIN_RST (1 << 4) 70 #define PMC_CNTRL_KBC_RST (1 << 3) 71 #define PMC_CNTRL_RTC_RST (1 << 2) 72 #define PMC_CNTRL_RTC_CLK_DIS (1 << 1) 73 #define PMC_CNTRL_KBC_CLK_DIS (1 << 0) 74 75 #define PMC_DPD_SAMPLE 0x020 76 77 #define PMC_CLAMP_STATUS 0x02C 78 #define PMC_CLAMP_STATUS_PARTID(x) (1 << ((x) & 0x1F)) 79 80 #define PMC_PWRGATE_TOGGLE 0x030 81 #define PMC_PWRGATE_TOGGLE_START (1 << 8) 82 #define PMC_PWRGATE_TOGGLE_PARTID(x) (((x) & 0x1F) << 0) 83 84 #define PMC_REMOVE_CLAMPING_CMD 0x034 85 #define PMC_REMOVE_CLAMPING_CMD_PARTID(x) (1 << ((x) & 0x1F)) 86 87 #define PMC_PWRGATE_STATUS 0x038 88 #define PMC_PWRGATE_STATUS_PARTID(x) (1 << ((x) & 0x1F)) 89 90 #define PMC_SCRATCH0 0x050 91 #define PMC_SCRATCH0_MODE_RECOVERY (1 << 31) 92 #define PMC_SCRATCH0_MODE_BOOTLOADER (1 << 30) 93 #define PMC_SCRATCH0_MODE_RCM (1 << 1) 94 #define PMC_SCRATCH0_MODE_MASK (PMC_SCRATCH0_MODE_RECOVERY | \ 95 PMC_SCRATCH0_MODE_BOOTLOADER | \ 96 PMC_SCRATCH0_MODE_RCM) 97 98 #define PMC_CPUPWRGOOD_TIMER 0x0c8 99 #define PMC_CPUPWROFF_TIMER 0x0cc 100 101 #define PMC_SCRATCH41 0x140 102 103 #define PMC_SENSOR_CTRL 0x1b0 104 #define PMC_SENSOR_CTRL_BLOCK_SCRATCH_WRITE (1 << 2) 105 #define PMC_SENSOR_CTRL_ENABLE_RST (1 << 1) 106 #define PMC_SENSOR_CTRL_ENABLE_PG (1 << 0) 107 108 #define PMC_IO_DPD_REQ 0x1b8 109 #define PMC_IO_DPD_REQ_CODE_IDLE (0 << 30) 110 #define PMC_IO_DPD_REQ_CODE_OFF (1 << 30) 111 #define PMC_IO_DPD_REQ_CODE_ON (2 << 30) 112 #define PMC_IO_DPD_REQ_CODE_MASK (3 << 30) 113 114 #define PMC_IO_DPD_STATUS 0x1bc 115 #define PMC_IO_DPD_STATUS_HDMI (1 << 28) 116 #define PMC_IO_DPD2_REQ 0x1c0 117 #define PMC_IO_DPD2_STATUS 0x1c4 118 #define PMC_IO_DPD2_STATUS_HV (1 << 6) 119 #define PMC_SEL_DPD_TIM 0x1c8 120 121 #define PMC_SCRATCH54 0x258 122 #define PMC_SCRATCH54_DATA_SHIFT 8 123 #define PMC_SCRATCH54_ADDR_SHIFT 0 124 125 #define PMC_SCRATCH55 0x25c 126 #define PMC_SCRATCH55_RST_ENABLE (1 << 31) 127 #define PMC_SCRATCH55_CNTRL_TYPE (1 << 30) 128 #define PMC_SCRATCH55_CNTRL_ID_SHIFT 27 129 #define PMC_SCRATCH55_CNTRL_ID_MASK 0x07 130 #define PMC_SCRATCH55_PINMUX_SHIFT 24 131 #define PMC_SCRATCH55_PINMUX_MASK 0x07 132 #define PMC_SCRATCH55_CHECKSUM_SHIFT 16 133 #define PMC_SCRATCH55_CHECKSUM_MASK 0xFF 134 #define PMC_SCRATCH55_16BITOP (1 << 15) 135 #define PMC_SCRATCH55_I2CSLV1_SHIFT 0 136 #define PMC_SCRATCH55_I2CSLV1_MASK 0x7F 137 138 #define PMC_GPU_RG_CNTRL 0x2d4 139 140 /* Secure access */ 141 #define PMC_SMC 0xc2fffe00 142 #define PMC_SMC_READ 0xaa 143 #define PMC_SMC_WRITE 0xbb 144 145 #define PMC_LOCK(_sc) mtx_lock(&(_sc)->mtx) 146 #define PMC_UNLOCK(_sc) mtx_unlock(&(_sc)->mtx) 147 #define PMC_LOCK_INIT(_sc) mtx_init(&(_sc)->mtx, \ 148 device_get_nameunit(_sc->dev), "tegra210_pmc", MTX_DEF) 149 #define PMC_LOCK_DESTROY(_sc) mtx_destroy(&(_sc)->mtx); 150 #define PMC_ASSERT_LOCKED(_sc) mtx_assert(&(_sc)->mtx, MA_OWNED); 151 #define PMC_ASSERT_UNLOCKED(_sc) mtx_assert(&(_sc)->mtx, MA_NOTOWNED); 152 153 struct tegra210_pmc_softc { 154 device_t dev; 155 struct resource *mem_res; 156 clk_t clk; 157 struct mtx mtx; 158 bool secure_access; 159 160 uint32_t rate; 161 enum tegra_suspend_mode suspend_mode; 162 uint32_t cpu_good_time; 163 uint32_t cpu_off_time; 164 uint32_t core_osc_time; 165 uint32_t core_pmu_time; 166 uint32_t core_off_time; 167 int corereq_high; 168 int sysclkreq_high; 169 int combined_req; 170 int cpu_pwr_good_en; 171 uint32_t lp0_vec_phys; 172 uint32_t lp0_vec_size; 173 }; 174 175 static struct ofw_compat_data compat_data[] = { 176 {"nvidia,tegra210-pmc", 1}, 177 {NULL, 0}, 178 }; 179 180 static struct tegra210_pmc_softc *pmc_sc; 181 182 static inline struct tegra210_pmc_softc * 183 tegra210_pmc_get_sc(void) 184 { 185 if (pmc_sc == NULL) 186 panic("To early call to Tegra PMC driver.\n"); 187 return (pmc_sc); 188 } 189 190 static void 191 WR4(struct tegra210_pmc_softc *sc, bus_size_t r, uint32_t v) 192 { 193 struct arm_smccc_res res; 194 195 if (sc->secure_access) { 196 arm_smccc_smc(PMC_SMC, PMC_SMC_WRITE, r, v, 0, 0, 0, 0, &res); 197 if (res.a0 != 0) 198 device_printf(sc->dev," PMC SMC write failed: %lu\n", 199 res.a0); 200 } 201 202 bus_write_4(sc->mem_res, r, v); 203 } 204 205 static uint32_t 206 RD4(struct tegra210_pmc_softc *sc, bus_size_t r) 207 { 208 struct arm_smccc_res res; 209 210 if (sc->secure_access) { 211 arm_smccc_smc(PMC_SMC, PMC_SMC_READ, r, 0, 0, 0, 0, 0, &res); 212 if (res.a0 != 0) 213 device_printf(sc->dev," PMC SMC write failed: %lu\n", 214 res.a0); 215 return((uint32_t)res.a1); 216 } 217 218 return(bus_read_4(sc->mem_res, r)); 219 } 220 221 static int 222 tegra210_pmc_set_powergate(struct tegra210_pmc_softc *sc, 223 enum tegra_powergate_id id, int ena) 224 { 225 uint32_t reg; 226 int i; 227 228 PMC_LOCK(sc); 229 230 reg = RD4(sc, PMC_PWRGATE_STATUS) & PMC_PWRGATE_STATUS_PARTID(id); 231 if (((reg != 0) && ena) || ((reg == 0) && !ena)) { 232 PMC_UNLOCK(sc); 233 return (0); 234 } 235 236 for (i = 100; i > 0; i--) { 237 reg = RD4(sc, PMC_PWRGATE_TOGGLE); 238 if ((reg & PMC_PWRGATE_TOGGLE_START) == 0) 239 break; 240 DELAY(1); 241 } 242 if (i <= 0) 243 device_printf(sc->dev, 244 "Timeout when waiting for TOGGLE_START\n"); 245 246 WR4(sc, PMC_PWRGATE_TOGGLE, 247 PMC_PWRGATE_TOGGLE_START | PMC_PWRGATE_TOGGLE_PARTID(id)); 248 249 for (i = 100; i > 0; i--) { 250 reg = RD4(sc, PMC_PWRGATE_TOGGLE); 251 if ((reg & PMC_PWRGATE_TOGGLE_START) == 0) 252 break; 253 DELAY(1); 254 } 255 if (i <= 0) 256 device_printf(sc->dev, 257 "Timeout when waiting for TOGGLE_START\n"); 258 PMC_UNLOCK(sc); 259 return (0); 260 } 261 262 int 263 tegra_powergate_remove_clamping(enum tegra_powergate_id id) 264 { 265 struct tegra210_pmc_softc *sc; 266 uint32_t reg; 267 enum tegra_powergate_id swid; 268 int i; 269 270 sc = tegra210_pmc_get_sc(); 271 272 if (id == TEGRA_POWERGATE_3D) { 273 WR4(sc, PMC_GPU_RG_CNTRL, 0); 274 return (0); 275 } 276 277 reg = RD4(sc, PMC_PWRGATE_STATUS); 278 if ((reg & PMC_PWRGATE_STATUS_PARTID(id)) == 0) 279 panic("Attempt to remove clamping for unpowered partition.\n"); 280 281 if (id == TEGRA_POWERGATE_PCX) 282 swid = TEGRA_POWERGATE_VDE; 283 else if (id == TEGRA_POWERGATE_VDE) 284 swid = TEGRA_POWERGATE_PCX; 285 else 286 swid = id; 287 WR4(sc, PMC_REMOVE_CLAMPING_CMD, PMC_REMOVE_CLAMPING_CMD_PARTID(swid)); 288 289 for (i = 100; i > 0; i--) { 290 reg = RD4(sc, PMC_REMOVE_CLAMPING_CMD); 291 if ((reg & PMC_REMOVE_CLAMPING_CMD_PARTID(swid)) == 0) 292 break; 293 DELAY(1); 294 } 295 if (i <= 0) 296 device_printf(sc->dev, "Timeout when remove clamping\n"); 297 298 reg = RD4(sc, PMC_CLAMP_STATUS); 299 if ((reg & PMC_CLAMP_STATUS_PARTID(id)) != 0) 300 panic("Cannot remove clamping\n"); 301 302 return (0); 303 } 304 305 int 306 tegra_powergate_is_powered(enum tegra_powergate_id id) 307 { 308 struct tegra210_pmc_softc *sc; 309 uint32_t reg; 310 311 sc = tegra210_pmc_get_sc(); 312 313 reg = RD4(sc, PMC_PWRGATE_STATUS); 314 return ((reg & PMC_PWRGATE_STATUS_PARTID(id)) ? 1 : 0); 315 } 316 317 int 318 tegra_powergate_power_on(enum tegra_powergate_id id) 319 { 320 struct tegra210_pmc_softc *sc; 321 int rv, i; 322 323 sc = tegra210_pmc_get_sc(); 324 325 rv = tegra210_pmc_set_powergate(sc, id, 1); 326 if (rv != 0) { 327 device_printf(sc->dev, "Cannot set powergate: %d\n", id); 328 return (rv); 329 } 330 331 for (i = 100; i > 0; i--) { 332 if (tegra_powergate_is_powered(id)) 333 break; 334 DELAY(1); 335 } 336 if (i <= 0) { 337 device_printf(sc->dev, "Timeout when waiting on power up\n"); 338 return(ETIMEDOUT); 339 } 340 341 return (rv); 342 } 343 344 int 345 tegra_powergate_power_off(enum tegra_powergate_id id) 346 { 347 struct tegra210_pmc_softc *sc; 348 int rv, i; 349 350 sc = tegra210_pmc_get_sc(); 351 352 rv = tegra210_pmc_set_powergate(sc, id, 0); 353 if (rv != 0) { 354 device_printf(sc->dev, "Cannot set powergate: %d\n", id); 355 return (rv); 356 } 357 for (i = 100; i > 0; i--) { 358 if (!tegra_powergate_is_powered(id)) 359 break; 360 DELAY(1); 361 } 362 if (i <= 0) 363 device_printf(sc->dev, "Timeout when waiting on power off\n"); 364 365 return (rv); 366 } 367 368 int 369 tegra_powergate_sequence_power_up(enum tegra_powergate_id id, clk_t clk, 370 hwreset_t rst) 371 { 372 struct tegra210_pmc_softc *sc; 373 int rv; 374 375 sc = tegra210_pmc_get_sc(); 376 377 rv = hwreset_assert(rst); 378 if (rv != 0) { 379 device_printf(sc->dev, "Cannot assert reset\n"); 380 return (rv); 381 } 382 383 rv = clk_stop(clk); 384 if (rv != 0) { 385 device_printf(sc->dev, "Cannot stop clock\n"); 386 goto clk_fail; 387 } 388 389 rv = tegra_powergate_power_on(id); 390 if (rv != 0) { 391 device_printf(sc->dev, "Cannot power on powergate\n"); 392 goto clk_fail; 393 } 394 395 rv = clk_enable(clk); 396 if (rv != 0) { 397 device_printf(sc->dev, "Cannot enable clock\n"); 398 goto clk_fail; 399 } 400 DELAY(20); 401 402 rv = tegra_powergate_remove_clamping(id); 403 if (rv != 0) { 404 device_printf(sc->dev, "Cannot remove clamping\n"); 405 goto fail; 406 } 407 rv = hwreset_deassert(rst); 408 if (rv != 0) { 409 device_printf(sc->dev, "Cannot unreset reset\n"); 410 goto fail; 411 } 412 return 0; 413 414 fail: 415 clk_disable(clk); 416 clk_fail: 417 hwreset_assert(rst); 418 tegra_powergate_power_off(id); 419 return (rv); 420 } 421 422 static int 423 tegra210_pmc_parse_fdt(struct tegra210_pmc_softc *sc, phandle_t node) 424 { 425 int rv; 426 uint32_t tmp; 427 uint32_t tmparr[2]; 428 429 rv = OF_getencprop(node, "nvidia,suspend-mode", &tmp, sizeof(tmp)); 430 if (rv > 0) { 431 switch (tmp) { 432 case 0: 433 sc->suspend_mode = TEGRA_SUSPEND_LP0; 434 break; 435 436 case 1: 437 sc->suspend_mode = TEGRA_SUSPEND_LP1; 438 break; 439 440 case 2: 441 sc->suspend_mode = TEGRA_SUSPEND_LP2; 442 break; 443 444 default: 445 sc->suspend_mode = TEGRA_SUSPEND_NONE; 446 break; 447 } 448 } 449 450 rv = OF_getencprop(node, "nvidia,cpu-pwr-good-time", &tmp, sizeof(tmp)); 451 if (rv > 0) { 452 sc->cpu_good_time = tmp; 453 sc->suspend_mode = TEGRA_SUSPEND_NONE; 454 } 455 456 rv = OF_getencprop(node, "nvidia,cpu-pwr-off-time", &tmp, sizeof(tmp)); 457 if (rv > 0) { 458 sc->cpu_off_time = tmp; 459 sc->suspend_mode = TEGRA_SUSPEND_NONE; 460 } 461 462 rv = OF_getencprop(node, "nvidia,core-pwr-good-time", tmparr, 463 sizeof(tmparr)); 464 if (rv == sizeof(tmparr)) { 465 sc->core_osc_time = tmparr[0]; 466 sc->core_pmu_time = tmparr[1]; 467 sc->suspend_mode = TEGRA_SUSPEND_NONE; 468 } 469 470 rv = OF_getencprop(node, "nvidia,core-pwr-off-time", &tmp, sizeof(tmp)); 471 if (rv > 0) { 472 sc->core_off_time = tmp; 473 sc->suspend_mode = TEGRA_SUSPEND_NONE; 474 } 475 476 sc->corereq_high = 477 OF_hasprop(node, "nvidia,core-power-req-active-high"); 478 sc->sysclkreq_high = 479 OF_hasprop(node, "nvidia,sys-clock-req-active-high"); 480 sc->combined_req = 481 OF_hasprop(node, "nvidia,combined-power-req"); 482 sc->cpu_pwr_good_en = 483 OF_hasprop(node, "nvidia,cpu-pwr-good-en"); 484 485 rv = OF_getencprop(node, "nvidia,lp0-vec", tmparr, sizeof(tmparr)); 486 if (rv == sizeof(tmparr)) { 487 488 sc->lp0_vec_phys = tmparr[0]; 489 sc->core_pmu_time = tmparr[1]; 490 sc->lp0_vec_size = TEGRA_SUSPEND_NONE; 491 if (sc->suspend_mode == TEGRA_SUSPEND_LP0) 492 sc->suspend_mode = TEGRA_SUSPEND_LP1; 493 } 494 return 0; 495 } 496 497 static void 498 tegra210_pmc_check_secure(struct tegra210_pmc_softc *sc) 499 { 500 uint32_t orig; 501 502 sc->secure_access = false; 503 504 /* 505 * If PMC is coverd by secure trust zone, all reads returns 0, 506 * Use scratch0 register acvcess test 507 */ 508 orig = RD4(sc, PMC_SCRATCH0); 509 WR4(sc, PMC_SCRATCH0, 0xDEADBEEF); 510 if (RD4(sc, PMC_SCRATCH0) == 0) { 511 sc->secure_access = true; 512 return; 513 } 514 WR4(sc, PMC_SCRATCH0, 0xBADC0DE); 515 if (RD4(sc, PMC_SCRATCH0) == 0) { 516 sc->secure_access = true; 517 return; 518 } 519 WR4(sc, PMC_SCRATCH0, orig); 520 } 521 522 static int 523 tegra210_pmc_probe(device_t dev) 524 { 525 526 if (!ofw_bus_status_okay(dev)) 527 return (ENXIO); 528 529 if (!ofw_bus_search_compatible(dev, compat_data)->ocd_data) 530 return (ENXIO); 531 532 device_set_desc(dev, "Tegra PMC"); 533 return (BUS_PROBE_DEFAULT); 534 } 535 536 static int 537 tegra210_pmc_detach(device_t dev) 538 { 539 540 /* This device is always present. */ 541 return (EBUSY); 542 } 543 544 static int 545 tegra210_pmc_attach(device_t dev) 546 { 547 struct tegra210_pmc_softc *sc; 548 int rid, rv; 549 uint32_t reg; 550 phandle_t node; 551 552 sc = device_get_softc(dev); 553 sc->dev = dev; 554 node = ofw_bus_get_node(dev); 555 PMC_LOCK_INIT(sc); 556 557 rv = tegra210_pmc_parse_fdt(sc, node); 558 if (rv != 0) { 559 device_printf(sc->dev, "Cannot parse FDT data\n"); 560 return (rv); 561 } 562 563 rv = clk_get_by_ofw_name(sc->dev, 0, "pclk", &sc->clk); 564 if (rv != 0) { 565 device_printf(sc->dev, "Cannot get \"pclk\" clock\n"); 566 return (ENXIO); 567 } 568 569 rid = 0; 570 sc->mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, 571 RF_ACTIVE); 572 if (sc->mem_res == NULL) { 573 device_printf(dev, "Cannot allocate memory resources\n"); 574 return (ENXIO); 575 } 576 577 tegra210_pmc_check_secure(sc); 578 579 /* Enable CPU power request. */ 580 reg = RD4(sc, PMC_CNTRL); 581 reg |= PMC_CNTRL_CPU_PWRREQ_OE; 582 WR4(sc, PMC_CNTRL, reg); 583 584 /* Set sysclk output polarity */ 585 reg = RD4(sc, PMC_CNTRL); 586 if (sc->sysclkreq_high) 587 reg &= ~PMC_CNTRL_SYSCLK_POLARITY; 588 else 589 reg |= PMC_CNTRL_SYSCLK_POLARITY; 590 WR4(sc, PMC_CNTRL, reg); 591 592 /* Enable sysclk request. */ 593 reg = RD4(sc, PMC_CNTRL); 594 reg |= PMC_CNTRL_SYSCLK_OE; 595 WR4(sc, PMC_CNTRL, reg); 596 597 /* 598 * Remove HDMI from deep power down mode. 599 * XXX mote this to HDMI driver 600 */ 601 reg = RD4(sc, PMC_IO_DPD_STATUS); 602 reg &= ~ PMC_IO_DPD_STATUS_HDMI; 603 WR4(sc, PMC_IO_DPD_STATUS, reg); 604 605 reg = RD4(sc, PMC_IO_DPD2_STATUS); 606 reg &= ~ PMC_IO_DPD2_STATUS_HV; 607 WR4(sc, PMC_IO_DPD2_STATUS, reg); 608 609 if (pmc_sc != NULL) 610 panic("tegra210_pmc: double driver attach"); 611 pmc_sc = sc; 612 return (0); 613 } 614 615 static device_method_t tegra210_pmc_methods[] = { 616 /* Device interface */ 617 DEVMETHOD(device_probe, tegra210_pmc_probe), 618 DEVMETHOD(device_attach, tegra210_pmc_attach), 619 DEVMETHOD(device_detach, tegra210_pmc_detach), 620 621 DEVMETHOD_END 622 }; 623 624 static DEFINE_CLASS_0(pmc, tegra210_pmc_driver, tegra210_pmc_methods, 625 sizeof(struct tegra210_pmc_softc)); 626 EARLY_DRIVER_MODULE(tegra210_pmc, simplebus, tegra210_pmc_driver, NULL, NULL, 627 70); 628