1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2013 Ganbold Tsagaankhuu <ganbold@freebsd.org> 5 * Copyright (c) 2012 Oleksandr Tymoshenko <gonzo@freebsd.org> 6 * Copyright (c) 2012 Luiz Otavio O Souza. 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 * 30 */ 31 #include <sys/cdefs.h> 32 __FBSDID("$FreeBSD$"); 33 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/bus.h> 37 38 #include <sys/kernel.h> 39 #include <sys/module.h> 40 #include <sys/rman.h> 41 #include <sys/lock.h> 42 #include <sys/mutex.h> 43 #include <sys/gpio.h> 44 #include <sys/proc.h> 45 46 #include <machine/bus.h> 47 #include <machine/resource.h> 48 #include <machine/intr.h> 49 50 #include <dev/gpio/gpiobusvar.h> 51 #include <dev/ofw/ofw_bus.h> 52 #include <dev/ofw/ofw_bus_subr.h> 53 #include <dev/fdt/fdt_pinctrl.h> 54 55 #include <arm/allwinner/aw_machdep.h> 56 #include <arm/allwinner/allwinner_pinctrl.h> 57 #include <dev/extres/clk/clk.h> 58 #include <dev/extres/hwreset/hwreset.h> 59 #include <dev/extres/regulator/regulator.h> 60 61 #if defined(__aarch64__) 62 #include "opt_soc.h" 63 #endif 64 65 #include "pic_if.h" 66 #include "gpio_if.h" 67 68 #define AW_GPIO_DEFAULT_CAPS (GPIO_PIN_INPUT | GPIO_PIN_OUTPUT | \ 69 GPIO_PIN_PULLUP | GPIO_PIN_PULLDOWN); 70 71 #define AW_GPIO_INTR_CAPS (GPIO_INTR_LEVEL_LOW | GPIO_INTR_LEVEL_HIGH | \ 72 GPIO_INTR_EDGE_RISING | GPIO_INTR_EDGE_FALLING | GPIO_INTR_EDGE_BOTH) 73 74 #define AW_GPIO_NONE 0 75 #define AW_GPIO_PULLUP 1 76 #define AW_GPIO_PULLDOWN 2 77 78 #define AW_GPIO_INPUT 0 79 #define AW_GPIO_OUTPUT 1 80 81 #define AW_GPIO_DRV_MASK 0x3 82 #define AW_GPIO_PUD_MASK 0x3 83 84 #define AW_PINCTRL 1 85 #define AW_R_PINCTRL 2 86 87 struct aw_gpio_conf { 88 struct allwinner_padconf *padconf; 89 const char *banks; 90 }; 91 92 /* Defined in aw_padconf.c */ 93 #ifdef SOC_ALLWINNER_A10 94 extern struct allwinner_padconf a10_padconf; 95 struct aw_gpio_conf a10_gpio_conf = { 96 .padconf = &a10_padconf, 97 .banks = "abcdefghi", 98 }; 99 #endif 100 101 /* Defined in a13_padconf.c */ 102 #ifdef SOC_ALLWINNER_A13 103 extern struct allwinner_padconf a13_padconf; 104 struct aw_gpio_conf a13_gpio_conf = { 105 .padconf = &a13_padconf, 106 .banks = "bcdefg", 107 }; 108 #endif 109 110 /* Defined in a20_padconf.c */ 111 #ifdef SOC_ALLWINNER_A20 112 extern struct allwinner_padconf a20_padconf; 113 struct aw_gpio_conf a20_gpio_conf = { 114 .padconf = &a20_padconf, 115 .banks = "abcdefghi", 116 }; 117 #endif 118 119 /* Defined in a31_padconf.c */ 120 #ifdef SOC_ALLWINNER_A31 121 extern struct allwinner_padconf a31_padconf; 122 struct aw_gpio_conf a31_gpio_conf = { 123 .padconf = &a31_padconf, 124 .banks = "abcdefgh", 125 }; 126 #endif 127 128 /* Defined in a31s_padconf.c */ 129 #ifdef SOC_ALLWINNER_A31S 130 extern struct allwinner_padconf a31s_padconf; 131 struct aw_gpio_conf a31s_gpio_conf = { 132 .padconf = &a31s_padconf, 133 .banks = "abcdefgh", 134 }; 135 #endif 136 137 #if defined(SOC_ALLWINNER_A31) || defined(SOC_ALLWINNER_A31S) 138 extern struct allwinner_padconf a31_r_padconf; 139 struct aw_gpio_conf a31_r_gpio_conf = { 140 .padconf = &a31_r_padconf, 141 .banks = "lm", 142 }; 143 #endif 144 145 /* Defined in a33_padconf.c */ 146 #ifdef SOC_ALLWINNER_A33 147 extern struct allwinner_padconf a33_padconf; 148 struct aw_gpio_conf a33_gpio_conf = { 149 .padconf = &a33_padconf, 150 .banks = "bcdefgh", 151 }; 152 #endif 153 154 /* Defined in h3_padconf.c */ 155 #if defined(SOC_ALLWINNER_H3) || defined(SOC_ALLWINNER_H5) 156 extern struct allwinner_padconf h3_padconf; 157 extern struct allwinner_padconf h3_r_padconf; 158 struct aw_gpio_conf h3_gpio_conf = { 159 .padconf = &h3_padconf, 160 .banks = "acdefg", 161 }; 162 struct aw_gpio_conf h3_r_gpio_conf = { 163 .padconf = &h3_r_padconf, 164 .banks = "l", 165 }; 166 #endif 167 168 /* Defined in a83t_padconf.c */ 169 #ifdef SOC_ALLWINNER_A83T 170 extern struct allwinner_padconf a83t_padconf; 171 extern struct allwinner_padconf a83t_r_padconf; 172 struct aw_gpio_conf a83t_gpio_conf = { 173 .padconf = &a83t_padconf, 174 .banks = "bcdefgh" 175 }; 176 struct aw_gpio_conf a83t_r_gpio_conf = { 177 .padconf = &a83t_r_padconf, 178 .banks = "l", 179 }; 180 #endif 181 182 /* Defined in a64_padconf.c */ 183 #ifdef SOC_ALLWINNER_A64 184 extern struct allwinner_padconf a64_padconf; 185 extern struct allwinner_padconf a64_r_padconf; 186 struct aw_gpio_conf a64_gpio_conf = { 187 .padconf = &a64_padconf, 188 .banks = "bcdefgh", 189 }; 190 struct aw_gpio_conf a64_r_gpio_conf = { 191 .padconf = &a64_r_padconf, 192 .banks = "l", 193 }; 194 #endif 195 196 /* Defined in h6_padconf.c */ 197 #ifdef SOC_ALLWINNER_H6 198 extern struct allwinner_padconf h6_padconf; 199 extern struct allwinner_padconf h6_r_padconf; 200 struct aw_gpio_conf h6_gpio_conf = { 201 .padconf = &h6_padconf, 202 .banks = "cdfgh", 203 }; 204 struct aw_gpio_conf h6_r_gpio_conf = { 205 .padconf = &h6_r_padconf, 206 .banks = "lm", 207 }; 208 #endif 209 210 static struct ofw_compat_data compat_data[] = { 211 #ifdef SOC_ALLWINNER_A10 212 {"allwinner,sun4i-a10-pinctrl", (uintptr_t)&a10_gpio_conf}, 213 #endif 214 #ifdef SOC_ALLWINNER_A13 215 {"allwinner,sun5i-a13-pinctrl", (uintptr_t)&a13_gpio_conf}, 216 #endif 217 #ifdef SOC_ALLWINNER_A20 218 {"allwinner,sun7i-a20-pinctrl", (uintptr_t)&a20_gpio_conf}, 219 #endif 220 #ifdef SOC_ALLWINNER_A31 221 {"allwinner,sun6i-a31-pinctrl", (uintptr_t)&a31_gpio_conf}, 222 #endif 223 #ifdef SOC_ALLWINNER_A31S 224 {"allwinner,sun6i-a31s-pinctrl", (uintptr_t)&a31s_gpio_conf}, 225 #endif 226 #if defined(SOC_ALLWINNER_A31) || defined(SOC_ALLWINNER_A31S) 227 {"allwinner,sun6i-a31-r-pinctrl", (uintptr_t)&a31_r_gpio_conf}, 228 #endif 229 #ifdef SOC_ALLWINNER_A33 230 {"allwinner,sun6i-a33-pinctrl", (uintptr_t)&a33_gpio_conf}, 231 #endif 232 #ifdef SOC_ALLWINNER_A83T 233 {"allwinner,sun8i-a83t-pinctrl", (uintptr_t)&a83t_gpio_conf}, 234 {"allwinner,sun8i-a83t-r-pinctrl", (uintptr_t)&a83t_r_gpio_conf}, 235 #endif 236 #if defined(SOC_ALLWINNER_H3) || defined(SOC_ALLWINNER_H5) 237 {"allwinner,sun8i-h3-pinctrl", (uintptr_t)&h3_gpio_conf}, 238 {"allwinner,sun50i-h5-pinctrl", (uintptr_t)&h3_gpio_conf}, 239 {"allwinner,sun8i-h3-r-pinctrl", (uintptr_t)&h3_r_gpio_conf}, 240 #endif 241 #ifdef SOC_ALLWINNER_A64 242 {"allwinner,sun50i-a64-pinctrl", (uintptr_t)&a64_gpio_conf}, 243 {"allwinner,sun50i-a64-r-pinctrl", (uintptr_t)&a64_r_gpio_conf}, 244 #endif 245 #ifdef SOC_ALLWINNER_H6 246 {"allwinner,sun50i-h6-pinctrl", (uintptr_t)&h6_gpio_conf}, 247 {"allwinner,sun50i-h6-r-pinctrl", (uintptr_t)&h6_r_gpio_conf}, 248 #endif 249 {NULL, 0} 250 }; 251 252 struct clk_list { 253 TAILQ_ENTRY(clk_list) next; 254 clk_t clk; 255 }; 256 257 struct gpio_irqsrc { 258 struct intr_irqsrc isrc; 259 u_int irq; 260 uint32_t mode; 261 uint32_t pin; 262 uint32_t bank; 263 uint32_t intnum; 264 uint32_t intfunc; 265 uint32_t oldfunc; 266 bool enabled; 267 }; 268 269 #define AW_GPIO_MEMRES 0 270 #define AW_GPIO_IRQRES 1 271 #define AW_GPIO_RESSZ 2 272 273 struct aw_gpio_softc { 274 device_t sc_dev; 275 device_t sc_busdev; 276 struct resource * sc_res[AW_GPIO_RESSZ]; 277 struct mtx sc_mtx; 278 struct resource * sc_mem_res; 279 struct resource * sc_irq_res; 280 void * sc_intrhand; 281 struct aw_gpio_conf *conf; 282 TAILQ_HEAD(, clk_list) clk_list; 283 284 struct gpio_irqsrc *gpio_pic_irqsrc; 285 int nirqs; 286 }; 287 288 static struct resource_spec aw_gpio_res_spec[] = { 289 { SYS_RES_MEMORY, 0, RF_ACTIVE }, 290 { SYS_RES_IRQ, 0, RF_ACTIVE | RF_SHAREABLE }, 291 { -1, 0, 0 } 292 }; 293 294 #define AW_GPIO_LOCK(_sc) mtx_lock_spin(&(_sc)->sc_mtx) 295 #define AW_GPIO_UNLOCK(_sc) mtx_unlock_spin(&(_sc)->sc_mtx) 296 #define AW_GPIO_LOCK_ASSERT(_sc) mtx_assert(&(_sc)->sc_mtx, MA_OWNED) 297 298 #define AW_GPIO_GP_CFG(_bank, _idx) 0x00 + ((_bank) * 0x24) + ((_idx) << 2) 299 #define AW_GPIO_GP_DAT(_bank) 0x10 + ((_bank) * 0x24) 300 #define AW_GPIO_GP_DRV(_bank, _idx) 0x14 + ((_bank) * 0x24) + ((_idx) << 2) 301 #define AW_GPIO_GP_PUL(_bank, _idx) 0x1c + ((_bank) * 0x24) + ((_idx) << 2) 302 303 #define AW_GPIO_GP_INT_BASE(_bank) (0x200 + 0x20 * _bank) 304 305 #define AW_GPIO_GP_INT_CFG(_bank, _pin) (AW_GPIO_GP_INT_BASE(_bank) + (0x4 * ((_pin) / 8))) 306 #define AW_GPIO_GP_INT_CTL(_bank) (AW_GPIO_GP_INT_BASE(_bank) + 0x10) 307 #define AW_GPIO_GP_INT_STA(_bank) (AW_GPIO_GP_INT_BASE(_bank) + 0x14) 308 #define AW_GPIO_GP_INT_DEB(_bank) (AW_GPIO_GP_INT_BASE(_bank) + 0x18) 309 310 #define AW_GPIO_INT_EDGE_POSITIVE 0x0 311 #define AW_GPIO_INT_EDGE_NEGATIVE 0x1 312 #define AW_GPIO_INT_LEVEL_HIGH 0x2 313 #define AW_GPIO_INT_LEVEL_LOW 0x3 314 #define AW_GPIO_INT_EDGE_BOTH 0x4 315 316 static char *aw_gpio_parse_function(phandle_t node); 317 static const char **aw_gpio_parse_pins(phandle_t node, int *pins_nb); 318 static uint32_t aw_gpio_parse_bias(phandle_t node); 319 static int aw_gpio_parse_drive_strength(phandle_t node, uint32_t *drive); 320 321 static int aw_gpio_pin_get(device_t dev, uint32_t pin, unsigned int *value); 322 static int aw_gpio_pin_set(device_t dev, uint32_t pin, unsigned int value); 323 static int aw_gpio_pin_get_locked(struct aw_gpio_softc *sc, uint32_t pin, unsigned int *value); 324 static int aw_gpio_pin_set_locked(struct aw_gpio_softc *sc, uint32_t pin, unsigned int value); 325 326 static void aw_gpio_intr(void *arg); 327 static void aw_gpio_pic_disable_intr(device_t dev, struct intr_irqsrc *isrc); 328 static void aw_gpio_pic_disable_intr_locked(struct aw_gpio_softc *sc, struct intr_irqsrc *isrc); 329 static void aw_gpio_pic_post_filter(device_t dev, struct intr_irqsrc *isrc); 330 static int aw_gpio_register_isrcs(struct aw_gpio_softc *sc); 331 332 #define AW_GPIO_WRITE(_sc, _off, _val) \ 333 bus_write_4((_sc)->sc_res[AW_GPIO_MEMRES], _off, _val) 334 #define AW_GPIO_READ(_sc, _off) \ 335 bus_read_4((_sc)->sc_res[AW_GPIO_MEMRES], _off) 336 337 static uint32_t 338 aw_gpio_get_function(struct aw_gpio_softc *sc, uint32_t pin) 339 { 340 uint32_t bank, func, offset; 341 342 /* Must be called with lock held. */ 343 AW_GPIO_LOCK_ASSERT(sc); 344 345 if (pin > sc->conf->padconf->npins) 346 return (0); 347 bank = sc->conf->padconf->pins[pin].port; 348 pin = sc->conf->padconf->pins[pin].pin; 349 offset = ((pin & 0x07) << 2); 350 351 func = AW_GPIO_READ(sc, AW_GPIO_GP_CFG(bank, pin >> 3)); 352 353 return ((func >> offset) & 0x7); 354 } 355 356 static int 357 aw_gpio_set_function(struct aw_gpio_softc *sc, uint32_t pin, uint32_t f) 358 { 359 uint32_t bank, data, offset; 360 361 /* Check if the function exists in the padconf data */ 362 if (sc->conf->padconf->pins[pin].functions[f] == NULL) 363 return (EINVAL); 364 365 /* Must be called with lock held. */ 366 AW_GPIO_LOCK_ASSERT(sc); 367 368 bank = sc->conf->padconf->pins[pin].port; 369 pin = sc->conf->padconf->pins[pin].pin; 370 offset = ((pin & 0x07) << 2); 371 372 data = AW_GPIO_READ(sc, AW_GPIO_GP_CFG(bank, pin >> 3)); 373 data &= ~(7 << offset); 374 data |= (f << offset); 375 AW_GPIO_WRITE(sc, AW_GPIO_GP_CFG(bank, pin >> 3), data); 376 377 return (0); 378 } 379 380 static uint32_t 381 aw_gpio_get_pud(struct aw_gpio_softc *sc, uint32_t pin) 382 { 383 uint32_t bank, offset, val; 384 385 /* Must be called with lock held. */ 386 AW_GPIO_LOCK_ASSERT(sc); 387 388 bank = sc->conf->padconf->pins[pin].port; 389 pin = sc->conf->padconf->pins[pin].pin; 390 offset = ((pin & 0x0f) << 1); 391 392 val = AW_GPIO_READ(sc, AW_GPIO_GP_PUL(bank, pin >> 4)); 393 394 return ((val >> offset) & AW_GPIO_PUD_MASK); 395 } 396 397 static void 398 aw_gpio_set_pud(struct aw_gpio_softc *sc, uint32_t pin, uint32_t state) 399 { 400 uint32_t bank, offset, val; 401 402 if (aw_gpio_get_pud(sc, pin) == state) 403 return; 404 405 /* Must be called with lock held. */ 406 AW_GPIO_LOCK_ASSERT(sc); 407 408 bank = sc->conf->padconf->pins[pin].port; 409 pin = sc->conf->padconf->pins[pin].pin; 410 offset = ((pin & 0x0f) << 1); 411 412 val = AW_GPIO_READ(sc, AW_GPIO_GP_PUL(bank, pin >> 4)); 413 val &= ~(AW_GPIO_PUD_MASK << offset); 414 val |= (state << offset); 415 AW_GPIO_WRITE(sc, AW_GPIO_GP_PUL(bank, pin >> 4), val); 416 } 417 418 static uint32_t 419 aw_gpio_get_drv(struct aw_gpio_softc *sc, uint32_t pin) 420 { 421 uint32_t bank, offset, val; 422 423 /* Must be called with lock held. */ 424 AW_GPIO_LOCK_ASSERT(sc); 425 426 bank = sc->conf->padconf->pins[pin].port; 427 pin = sc->conf->padconf->pins[pin].pin; 428 offset = ((pin & 0x0f) << 1); 429 430 val = AW_GPIO_READ(sc, AW_GPIO_GP_DRV(bank, pin >> 4)); 431 432 return ((val >> offset) & AW_GPIO_DRV_MASK); 433 } 434 435 static void 436 aw_gpio_set_drv(struct aw_gpio_softc *sc, uint32_t pin, uint32_t drive) 437 { 438 uint32_t bank, offset, val; 439 440 if (aw_gpio_get_drv(sc, pin) == drive) 441 return; 442 443 /* Must be called with lock held. */ 444 AW_GPIO_LOCK_ASSERT(sc); 445 446 bank = sc->conf->padconf->pins[pin].port; 447 pin = sc->conf->padconf->pins[pin].pin; 448 offset = ((pin & 0x0f) << 1); 449 450 val = AW_GPIO_READ(sc, AW_GPIO_GP_DRV(bank, pin >> 4)); 451 val &= ~(AW_GPIO_DRV_MASK << offset); 452 val |= (drive << offset); 453 AW_GPIO_WRITE(sc, AW_GPIO_GP_DRV(bank, pin >> 4), val); 454 } 455 456 static int 457 aw_gpio_pin_configure(struct aw_gpio_softc *sc, uint32_t pin, uint32_t flags) 458 { 459 u_int val; 460 int err = 0; 461 462 /* Must be called with lock held. */ 463 AW_GPIO_LOCK_ASSERT(sc); 464 465 if (pin > sc->conf->padconf->npins) 466 return (EINVAL); 467 468 /* Manage input/output. */ 469 if (flags & GPIO_PIN_INPUT) { 470 err = aw_gpio_set_function(sc, pin, AW_GPIO_INPUT); 471 } else if ((flags & GPIO_PIN_OUTPUT) && 472 aw_gpio_get_function(sc, pin) != AW_GPIO_OUTPUT) { 473 if (flags & GPIO_PIN_PRESET_LOW) { 474 aw_gpio_pin_set_locked(sc, pin, 0); 475 } else if (flags & GPIO_PIN_PRESET_HIGH) { 476 aw_gpio_pin_set_locked(sc, pin, 1); 477 } else { 478 /* Read the pin and preset output to current state. */ 479 err = aw_gpio_set_function(sc, pin, AW_GPIO_INPUT); 480 if (err == 0) { 481 aw_gpio_pin_get_locked(sc, pin, &val); 482 aw_gpio_pin_set_locked(sc, pin, val); 483 } 484 } 485 if (err == 0) 486 err = aw_gpio_set_function(sc, pin, AW_GPIO_OUTPUT); 487 } 488 489 if (err) 490 return (err); 491 492 /* Manage Pull-up/pull-down. */ 493 if (flags & GPIO_PIN_PULLUP) 494 aw_gpio_set_pud(sc, pin, AW_GPIO_PULLUP); 495 else if (flags & GPIO_PIN_PULLDOWN) 496 aw_gpio_set_pud(sc, pin, AW_GPIO_PULLDOWN); 497 else 498 aw_gpio_set_pud(sc, pin, AW_GPIO_NONE); 499 500 return (0); 501 } 502 503 static device_t 504 aw_gpio_get_bus(device_t dev) 505 { 506 struct aw_gpio_softc *sc; 507 508 sc = device_get_softc(dev); 509 510 return (sc->sc_busdev); 511 } 512 513 static int 514 aw_gpio_pin_max(device_t dev, int *maxpin) 515 { 516 struct aw_gpio_softc *sc; 517 518 sc = device_get_softc(dev); 519 520 *maxpin = sc->conf->padconf->npins - 1; 521 return (0); 522 } 523 524 static int 525 aw_gpio_pin_getcaps(device_t dev, uint32_t pin, uint32_t *caps) 526 { 527 struct aw_gpio_softc *sc; 528 529 sc = device_get_softc(dev); 530 if (pin >= sc->conf->padconf->npins) 531 return (EINVAL); 532 533 *caps = AW_GPIO_DEFAULT_CAPS; 534 if (sc->conf->padconf->pins[pin].eint_func != 0) 535 *caps |= AW_GPIO_INTR_CAPS; 536 537 return (0); 538 } 539 540 static int 541 aw_gpio_pin_getflags(device_t dev, uint32_t pin, uint32_t *flags) 542 { 543 struct aw_gpio_softc *sc; 544 uint32_t func; 545 uint32_t pud; 546 547 sc = device_get_softc(dev); 548 if (pin >= sc->conf->padconf->npins) 549 return (EINVAL); 550 551 AW_GPIO_LOCK(sc); 552 func = aw_gpio_get_function(sc, pin); 553 switch (func) { 554 case AW_GPIO_INPUT: 555 *flags = GPIO_PIN_INPUT; 556 break; 557 case AW_GPIO_OUTPUT: 558 *flags = GPIO_PIN_OUTPUT; 559 break; 560 default: 561 *flags = 0; 562 break; 563 } 564 565 pud = aw_gpio_get_pud(sc, pin); 566 switch (pud) { 567 case AW_GPIO_PULLDOWN: 568 *flags |= GPIO_PIN_PULLDOWN; 569 break; 570 case AW_GPIO_PULLUP: 571 *flags |= GPIO_PIN_PULLUP; 572 break; 573 default: 574 break; 575 } 576 577 AW_GPIO_UNLOCK(sc); 578 579 return (0); 580 } 581 582 static int 583 aw_gpio_pin_getname(device_t dev, uint32_t pin, char *name) 584 { 585 struct aw_gpio_softc *sc; 586 587 sc = device_get_softc(dev); 588 if (pin >= sc->conf->padconf->npins) 589 return (EINVAL); 590 591 snprintf(name, GPIOMAXNAME - 1, "%s", 592 sc->conf->padconf->pins[pin].name); 593 name[GPIOMAXNAME - 1] = '\0'; 594 595 return (0); 596 } 597 598 static int 599 aw_gpio_pin_setflags(device_t dev, uint32_t pin, uint32_t flags) 600 { 601 struct aw_gpio_softc *sc; 602 int err; 603 604 sc = device_get_softc(dev); 605 if (pin > sc->conf->padconf->npins) 606 return (EINVAL); 607 608 AW_GPIO_LOCK(sc); 609 err = aw_gpio_pin_configure(sc, pin, flags); 610 AW_GPIO_UNLOCK(sc); 611 612 return (err); 613 } 614 615 static int 616 aw_gpio_pin_set_locked(struct aw_gpio_softc *sc, uint32_t pin, 617 unsigned int value) 618 { 619 uint32_t bank, data; 620 621 AW_GPIO_LOCK_ASSERT(sc); 622 623 if (pin > sc->conf->padconf->npins) 624 return (EINVAL); 625 626 bank = sc->conf->padconf->pins[pin].port; 627 pin = sc->conf->padconf->pins[pin].pin; 628 629 data = AW_GPIO_READ(sc, AW_GPIO_GP_DAT(bank)); 630 if (value) 631 data |= (1 << pin); 632 else 633 data &= ~(1 << pin); 634 AW_GPIO_WRITE(sc, AW_GPIO_GP_DAT(bank), data); 635 636 return (0); 637 } 638 639 static int 640 aw_gpio_pin_set(device_t dev, uint32_t pin, unsigned int value) 641 { 642 struct aw_gpio_softc *sc; 643 int ret; 644 645 sc = device_get_softc(dev); 646 647 AW_GPIO_LOCK(sc); 648 ret = aw_gpio_pin_set_locked(sc, pin, value); 649 AW_GPIO_UNLOCK(sc); 650 651 return (ret); 652 } 653 654 static int 655 aw_gpio_pin_get_locked(struct aw_gpio_softc *sc,uint32_t pin, 656 unsigned int *val) 657 { 658 uint32_t bank, reg_data; 659 660 AW_GPIO_LOCK_ASSERT(sc); 661 662 if (pin > sc->conf->padconf->npins) 663 return (EINVAL); 664 665 bank = sc->conf->padconf->pins[pin].port; 666 pin = sc->conf->padconf->pins[pin].pin; 667 668 reg_data = AW_GPIO_READ(sc, AW_GPIO_GP_DAT(bank)); 669 *val = (reg_data & (1 << pin)) ? 1 : 0; 670 671 return (0); 672 } 673 674 static char * 675 aw_gpio_parse_function(phandle_t node) 676 { 677 char *function; 678 679 if (OF_getprop_alloc(node, "function", 680 (void **)&function) != -1) 681 return (function); 682 if (OF_getprop_alloc(node, "allwinner,function", 683 (void **)&function) != -1) 684 return (function); 685 686 return (NULL); 687 } 688 689 static const char ** 690 aw_gpio_parse_pins(phandle_t node, int *pins_nb) 691 { 692 const char **pinlist; 693 694 *pins_nb = ofw_bus_string_list_to_array(node, "pins", &pinlist); 695 if (*pins_nb > 0) 696 return (pinlist); 697 698 *pins_nb = ofw_bus_string_list_to_array(node, "allwinner,pins", 699 &pinlist); 700 if (*pins_nb > 0) 701 return (pinlist); 702 703 return (NULL); 704 } 705 706 static uint32_t 707 aw_gpio_parse_bias(phandle_t node) 708 { 709 uint32_t bias; 710 711 if (OF_getencprop(node, "pull", &bias, sizeof(bias)) != -1) 712 return (bias); 713 if (OF_getencprop(node, "allwinner,pull", &bias, sizeof(bias)) != -1) 714 return (bias); 715 if (OF_hasprop(node, "bias-disable")) 716 return (AW_GPIO_NONE); 717 if (OF_hasprop(node, "bias-pull-up")) 718 return (AW_GPIO_PULLUP); 719 if (OF_hasprop(node, "bias-pull-down")) 720 return (AW_GPIO_PULLDOWN); 721 722 return (AW_GPIO_NONE); 723 } 724 725 static int 726 aw_gpio_parse_drive_strength(phandle_t node, uint32_t *drive) 727 { 728 uint32_t drive_str; 729 730 if (OF_getencprop(node, "drive", drive, sizeof(*drive)) != -1) 731 return (0); 732 if (OF_getencprop(node, "allwinner,drive", drive, sizeof(*drive)) != -1) 733 return (0); 734 if (OF_getencprop(node, "drive-strength", &drive_str, 735 sizeof(drive_str)) != -1) { 736 *drive = (drive_str / 10) - 1; 737 return (0); 738 } 739 740 return (1); 741 } 742 743 static int 744 aw_gpio_pin_get(device_t dev, uint32_t pin, unsigned int *val) 745 { 746 struct aw_gpio_softc *sc; 747 int ret; 748 749 sc = device_get_softc(dev); 750 751 AW_GPIO_LOCK(sc); 752 ret = aw_gpio_pin_get_locked(sc, pin, val); 753 AW_GPIO_UNLOCK(sc); 754 755 return (ret); 756 } 757 758 static int 759 aw_gpio_pin_toggle(device_t dev, uint32_t pin) 760 { 761 struct aw_gpio_softc *sc; 762 uint32_t bank, data; 763 764 sc = device_get_softc(dev); 765 if (pin > sc->conf->padconf->npins) 766 return (EINVAL); 767 768 bank = sc->conf->padconf->pins[pin].port; 769 pin = sc->conf->padconf->pins[pin].pin; 770 771 AW_GPIO_LOCK(sc); 772 data = AW_GPIO_READ(sc, AW_GPIO_GP_DAT(bank)); 773 if (data & (1 << pin)) 774 data &= ~(1 << pin); 775 else 776 data |= (1 << pin); 777 AW_GPIO_WRITE(sc, AW_GPIO_GP_DAT(bank), data); 778 AW_GPIO_UNLOCK(sc); 779 780 return (0); 781 } 782 783 static int 784 aw_gpio_pin_access_32(device_t dev, uint32_t first_pin, uint32_t clear_pins, 785 uint32_t change_pins, uint32_t *orig_pins) 786 { 787 struct aw_gpio_softc *sc; 788 uint32_t bank, data, pin; 789 790 sc = device_get_softc(dev); 791 if (first_pin > sc->conf->padconf->npins) 792 return (EINVAL); 793 794 /* 795 * We require that first_pin refers to the first pin in a bank, because 796 * this API is not about convenience, it's for making a set of pins 797 * change simultaneously (required) with reasonably high performance 798 * (desired); we need to do a read-modify-write on a single register. 799 */ 800 bank = sc->conf->padconf->pins[first_pin].port; 801 pin = sc->conf->padconf->pins[first_pin].pin; 802 if (pin != 0) 803 return (EINVAL); 804 805 AW_GPIO_LOCK(sc); 806 data = AW_GPIO_READ(sc, AW_GPIO_GP_DAT(bank)); 807 if ((clear_pins | change_pins) != 0) 808 AW_GPIO_WRITE(sc, AW_GPIO_GP_DAT(bank), 809 (data & ~clear_pins) ^ change_pins); 810 AW_GPIO_UNLOCK(sc); 811 812 if (orig_pins != NULL) 813 *orig_pins = data; 814 815 return (0); 816 } 817 818 static int 819 aw_gpio_pin_config_32(device_t dev, uint32_t first_pin, uint32_t num_pins, 820 uint32_t *pin_flags) 821 { 822 struct aw_gpio_softc *sc; 823 uint32_t pin; 824 int err; 825 826 sc = device_get_softc(dev); 827 if (first_pin > sc->conf->padconf->npins) 828 return (EINVAL); 829 830 if (sc->conf->padconf->pins[first_pin].pin != 0) 831 return (EINVAL); 832 833 /* 834 * The configuration for a bank of pins is scattered among several 835 * registers; we cannot g'tee to simultaneously change the state of all 836 * the pins in the flags array. So just loop through the array 837 * configuring each pin for now. If there was a strong need, it might 838 * be possible to support some limited simultaneous config, such as 839 * adjacent groups of 8 pins that line up the same as the config regs. 840 */ 841 for (err = 0, pin = first_pin; err == 0 && pin < num_pins; ++pin) { 842 if (pin_flags[pin] & (GPIO_PIN_INPUT | GPIO_PIN_OUTPUT)) 843 err = aw_gpio_pin_configure(sc, pin, pin_flags[pin]); 844 } 845 846 return (err); 847 } 848 849 static int 850 aw_gpio_map_gpios(device_t bus, phandle_t dev, phandle_t gparent, int gcells, 851 pcell_t *gpios, uint32_t *pin, uint32_t *flags) 852 { 853 struct aw_gpio_softc *sc; 854 int i; 855 856 sc = device_get_softc(bus); 857 858 /* The GPIO pins are mapped as: <gpio-phandle bank pin flags>. */ 859 for (i = 0; i < sc->conf->padconf->npins; i++) 860 if (sc->conf->padconf->pins[i].port == gpios[0] && 861 sc->conf->padconf->pins[i].pin == gpios[1]) { 862 *pin = i; 863 break; 864 } 865 *flags = gpios[gcells - 1]; 866 867 return (0); 868 } 869 870 static int 871 aw_find_pinnum_by_name(struct aw_gpio_softc *sc, const char *pinname) 872 { 873 int i; 874 875 for (i = 0; i < sc->conf->padconf->npins; i++) 876 if (!strcmp(pinname, sc->conf->padconf->pins[i].name)) 877 return i; 878 879 return (-1); 880 } 881 882 static int 883 aw_find_pin_func(struct aw_gpio_softc *sc, int pin, const char *func) 884 { 885 int i; 886 887 for (i = 0; i < AW_MAX_FUNC_BY_PIN; i++) 888 if (sc->conf->padconf->pins[pin].functions[i] && 889 !strcmp(func, sc->conf->padconf->pins[pin].functions[i])) 890 return (i); 891 892 return (-1); 893 } 894 895 static int 896 aw_fdt_configure_pins(device_t dev, phandle_t cfgxref) 897 { 898 struct aw_gpio_softc *sc; 899 phandle_t node; 900 const char **pinlist = NULL; 901 char *pin_function = NULL; 902 uint32_t pin_drive, pin_pull; 903 int pins_nb, pin_num, pin_func, i, ret; 904 bool set_drive; 905 906 sc = device_get_softc(dev); 907 node = OF_node_from_xref(cfgxref); 908 ret = 0; 909 set_drive = false; 910 911 /* Getting all prop for configuring pins */ 912 pinlist = aw_gpio_parse_pins(node, &pins_nb); 913 if (pinlist == NULL) 914 return (ENOENT); 915 916 pin_function = aw_gpio_parse_function(node); 917 if (pin_function == NULL) { 918 ret = ENOENT; 919 goto out; 920 } 921 922 if (aw_gpio_parse_drive_strength(node, &pin_drive) == 0) 923 set_drive = true; 924 925 pin_pull = aw_gpio_parse_bias(node); 926 927 /* Configure each pin to the correct function, drive and pull */ 928 for (i = 0; i < pins_nb; i++) { 929 pin_num = aw_find_pinnum_by_name(sc, pinlist[i]); 930 if (pin_num == -1) { 931 ret = ENOENT; 932 goto out; 933 } 934 pin_func = aw_find_pin_func(sc, pin_num, pin_function); 935 if (pin_func == -1) { 936 ret = ENOENT; 937 goto out; 938 } 939 940 AW_GPIO_LOCK(sc); 941 942 if (aw_gpio_get_function(sc, pin_num) != pin_func) 943 aw_gpio_set_function(sc, pin_num, pin_func); 944 if (set_drive) 945 aw_gpio_set_drv(sc, pin_num, pin_drive); 946 if (pin_pull != AW_GPIO_NONE) 947 aw_gpio_set_pud(sc, pin_num, pin_pull); 948 949 AW_GPIO_UNLOCK(sc); 950 } 951 952 out: 953 OF_prop_free(pinlist); 954 OF_prop_free(pin_function); 955 return (ret); 956 } 957 958 static void 959 aw_gpio_enable_bank_supply(void *arg) 960 { 961 struct aw_gpio_softc *sc = arg; 962 regulator_t vcc_supply; 963 char bank_reg_name[16]; 964 int i, nbanks; 965 966 nbanks = strlen(sc->conf->banks); 967 for (i = 0; i < nbanks; i++) { 968 snprintf(bank_reg_name, sizeof(bank_reg_name), "vcc-p%c-supply", 969 sc->conf->banks[i]); 970 971 if (regulator_get_by_ofw_property(sc->sc_dev, 0, bank_reg_name, &vcc_supply) == 0) { 972 if (bootverbose) 973 device_printf(sc->sc_dev, 974 "Enabling regulator for gpio bank %c\n", 975 sc->conf->banks[i]); 976 if (regulator_enable(vcc_supply) != 0) { 977 device_printf(sc->sc_dev, 978 "Cannot enable regulator for bank %c\n", 979 sc->conf->banks[i]); 980 } 981 } 982 } 983 } 984 985 static int 986 aw_gpio_probe(device_t dev) 987 { 988 989 if (!ofw_bus_status_okay(dev)) 990 return (ENXIO); 991 992 if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0) 993 return (ENXIO); 994 995 device_set_desc(dev, "Allwinner GPIO/Pinmux controller"); 996 return (BUS_PROBE_DEFAULT); 997 } 998 999 static int 1000 aw_gpio_attach(device_t dev) 1001 { 1002 int error; 1003 phandle_t gpio; 1004 struct aw_gpio_softc *sc; 1005 struct clk_list *clkp, *clkp_tmp; 1006 clk_t clk; 1007 hwreset_t rst = NULL; 1008 int off, err, clkret; 1009 1010 sc = device_get_softc(dev); 1011 sc->sc_dev = dev; 1012 1013 mtx_init(&sc->sc_mtx, "aw gpio", "gpio", MTX_SPIN); 1014 1015 if (bus_alloc_resources(dev, aw_gpio_res_spec, sc->sc_res) != 0) { 1016 device_printf(dev, "cannot allocate device resources\n"); 1017 return (ENXIO); 1018 } 1019 1020 if (bus_setup_intr(dev, sc->sc_res[AW_GPIO_IRQRES], 1021 INTR_TYPE_CLK | INTR_MPSAFE, NULL, aw_gpio_intr, sc, 1022 &sc->sc_intrhand)) { 1023 device_printf(dev, "cannot setup interrupt handler\n"); 1024 goto fail; 1025 } 1026 1027 /* Find our node. */ 1028 gpio = ofw_bus_get_node(sc->sc_dev); 1029 if (!OF_hasprop(gpio, "gpio-controller")) 1030 /* Node is not a GPIO controller. */ 1031 goto fail; 1032 1033 /* Use the right pin data for the current SoC */ 1034 sc->conf = (struct aw_gpio_conf *)ofw_bus_search_compatible(dev, 1035 compat_data)->ocd_data; 1036 1037 if (hwreset_get_by_ofw_idx(dev, 0, 0, &rst) == 0) { 1038 error = hwreset_deassert(rst); 1039 if (error != 0) { 1040 device_printf(dev, "cannot de-assert reset\n"); 1041 goto fail; 1042 } 1043 } 1044 1045 TAILQ_INIT(&sc->clk_list); 1046 for (off = 0, clkret = 0; clkret == 0; off++) { 1047 clkret = clk_get_by_ofw_index(dev, 0, off, &clk); 1048 if (clkret != 0) 1049 break; 1050 err = clk_enable(clk); 1051 if (err != 0) { 1052 device_printf(dev, "Could not enable clock %s\n", 1053 clk_get_name(clk)); 1054 goto fail; 1055 } 1056 clkp = malloc(sizeof(*clkp), M_DEVBUF, M_WAITOK | M_ZERO); 1057 clkp->clk = clk; 1058 TAILQ_INSERT_TAIL(&sc->clk_list, clkp, next); 1059 } 1060 if (clkret != 0 && clkret != ENOENT) { 1061 device_printf(dev, "Could not find clock at offset %d (%d)\n", 1062 off, clkret); 1063 goto fail; 1064 } 1065 1066 aw_gpio_register_isrcs(sc); 1067 intr_pic_register(dev, OF_xref_from_node(ofw_bus_get_node(dev))); 1068 1069 sc->sc_busdev = gpiobus_attach_bus(dev); 1070 if (sc->sc_busdev == NULL) 1071 goto fail; 1072 1073 /* 1074 * Register as a pinctrl device 1075 */ 1076 fdt_pinctrl_register(dev, "pins"); 1077 fdt_pinctrl_configure_tree(dev); 1078 fdt_pinctrl_register(dev, "allwinner,pins"); 1079 fdt_pinctrl_configure_tree(dev); 1080 1081 config_intrhook_oneshot(aw_gpio_enable_bank_supply, sc); 1082 1083 return (0); 1084 1085 fail: 1086 if (sc->sc_irq_res) 1087 bus_release_resource(dev, SYS_RES_IRQ, 0, sc->sc_irq_res); 1088 if (sc->sc_mem_res) 1089 bus_release_resource(dev, SYS_RES_MEMORY, 0, sc->sc_mem_res); 1090 mtx_destroy(&sc->sc_mtx); 1091 1092 /* Disable clock */ 1093 TAILQ_FOREACH_SAFE(clkp, &sc->clk_list, next, clkp_tmp) { 1094 err = clk_disable(clkp->clk); 1095 if (err != 0) 1096 device_printf(dev, "Could not disable clock %s\n", 1097 clk_get_name(clkp->clk)); 1098 err = clk_release(clkp->clk); 1099 if (err != 0) 1100 device_printf(dev, "Could not release clock %s\n", 1101 clk_get_name(clkp->clk)); 1102 TAILQ_REMOVE(&sc->clk_list, clkp, next); 1103 free(clkp, M_DEVBUF); 1104 } 1105 1106 /* Assert resets */ 1107 if (rst) { 1108 hwreset_assert(rst); 1109 hwreset_release(rst); 1110 } 1111 1112 return (ENXIO); 1113 } 1114 1115 static int 1116 aw_gpio_detach(device_t dev) 1117 { 1118 1119 return (EBUSY); 1120 } 1121 1122 static void 1123 aw_gpio_intr(void *arg) 1124 { 1125 struct aw_gpio_softc *sc; 1126 struct intr_irqsrc *isrc; 1127 uint32_t reg; 1128 int irq; 1129 1130 sc = (struct aw_gpio_softc *)arg; 1131 1132 AW_GPIO_LOCK(sc); 1133 for (irq = 0; irq < sc->nirqs; irq++) { 1134 if (!sc->gpio_pic_irqsrc[irq].enabled) 1135 continue; 1136 1137 reg = AW_GPIO_READ(sc, AW_GPIO_GP_INT_STA(sc->gpio_pic_irqsrc[irq].bank)); 1138 if (!(reg & (1 << sc->gpio_pic_irqsrc[irq].intnum))) 1139 continue; 1140 1141 isrc = &sc->gpio_pic_irqsrc[irq].isrc; 1142 if (intr_isrc_dispatch(isrc, curthread->td_intr_frame) != 0) { 1143 aw_gpio_pic_disable_intr_locked(sc, isrc); 1144 aw_gpio_pic_post_filter(sc->sc_dev, isrc); 1145 device_printf(sc->sc_dev, "Stray irq %u disabled\n", irq); 1146 } 1147 } 1148 AW_GPIO_UNLOCK(sc); 1149 } 1150 1151 /* 1152 * Interrupts support 1153 */ 1154 1155 static int 1156 aw_gpio_register_isrcs(struct aw_gpio_softc *sc) 1157 { 1158 const char *name; 1159 int nirqs; 1160 int pin; 1161 int err; 1162 1163 name = device_get_nameunit(sc->sc_dev); 1164 1165 for (nirqs = 0, pin = 0; pin < sc->conf->padconf->npins; pin++) { 1166 if (sc->conf->padconf->pins[pin].eint_func == 0) 1167 continue; 1168 1169 nirqs++; 1170 } 1171 1172 sc->gpio_pic_irqsrc = malloc(sizeof(*sc->gpio_pic_irqsrc) * nirqs, 1173 M_DEVBUF, M_WAITOK | M_ZERO); 1174 for (nirqs = 0, pin = 0; pin < sc->conf->padconf->npins; pin++) { 1175 if (sc->conf->padconf->pins[pin].eint_func == 0) 1176 continue; 1177 1178 sc->gpio_pic_irqsrc[nirqs].pin = pin; 1179 sc->gpio_pic_irqsrc[nirqs].bank = sc->conf->padconf->pins[pin].eint_bank; 1180 sc->gpio_pic_irqsrc[nirqs].intnum = sc->conf->padconf->pins[pin].eint_num; 1181 sc->gpio_pic_irqsrc[nirqs].intfunc = sc->conf->padconf->pins[pin].eint_func; 1182 sc->gpio_pic_irqsrc[nirqs].irq = nirqs; 1183 sc->gpio_pic_irqsrc[nirqs].mode = GPIO_INTR_CONFORM; 1184 1185 err = intr_isrc_register(&sc->gpio_pic_irqsrc[nirqs].isrc, 1186 sc->sc_dev, 0, "%s,%s", name, 1187 sc->conf->padconf->pins[pin].functions[sc->conf->padconf->pins[pin].eint_func]); 1188 if (err) { 1189 device_printf(sc->sc_dev, "intr_isrs_register failed for irq %d\n", nirqs); 1190 } 1191 1192 nirqs++; 1193 } 1194 1195 sc->nirqs = nirqs; 1196 1197 return (0); 1198 } 1199 1200 static void 1201 aw_gpio_pic_disable_intr_locked(struct aw_gpio_softc *sc, struct intr_irqsrc *isrc) 1202 { 1203 u_int irq; 1204 uint32_t reg; 1205 1206 AW_GPIO_LOCK_ASSERT(sc); 1207 irq = ((struct gpio_irqsrc *)isrc)->irq; 1208 reg = AW_GPIO_READ(sc, AW_GPIO_GP_INT_CTL(sc->gpio_pic_irqsrc[irq].bank)); 1209 reg &= ~(1 << sc->gpio_pic_irqsrc[irq].intnum); 1210 AW_GPIO_WRITE(sc, AW_GPIO_GP_INT_CTL(sc->gpio_pic_irqsrc[irq].bank), reg); 1211 1212 sc->gpio_pic_irqsrc[irq].enabled = false; 1213 } 1214 1215 static void 1216 aw_gpio_pic_disable_intr(device_t dev, struct intr_irqsrc *isrc) 1217 { 1218 struct aw_gpio_softc *sc; 1219 1220 sc = device_get_softc(dev); 1221 1222 AW_GPIO_LOCK(sc); 1223 aw_gpio_pic_disable_intr_locked(sc, isrc); 1224 AW_GPIO_UNLOCK(sc); 1225 } 1226 1227 static void 1228 aw_gpio_pic_enable_intr(device_t dev, struct intr_irqsrc *isrc) 1229 { 1230 struct aw_gpio_softc *sc; 1231 u_int irq; 1232 uint32_t reg; 1233 1234 sc = device_get_softc(dev); 1235 irq = ((struct gpio_irqsrc *)isrc)->irq; 1236 AW_GPIO_LOCK(sc); 1237 reg = AW_GPIO_READ(sc, AW_GPIO_GP_INT_CTL(sc->gpio_pic_irqsrc[irq].bank)); 1238 reg |= 1 << sc->gpio_pic_irqsrc[irq].intnum; 1239 AW_GPIO_WRITE(sc, AW_GPIO_GP_INT_CTL(sc->gpio_pic_irqsrc[irq].bank), reg); 1240 AW_GPIO_UNLOCK(sc); 1241 1242 sc->gpio_pic_irqsrc[irq].enabled = true; 1243 } 1244 1245 static int 1246 aw_gpio_pic_map_gpio(struct aw_gpio_softc *sc, struct intr_map_data_gpio *dag, 1247 u_int *irqp, u_int *mode) 1248 { 1249 u_int irq; 1250 int pin; 1251 1252 irq = dag->gpio_pin_num; 1253 1254 for (pin = 0; pin < sc->nirqs; pin++) 1255 if (sc->gpio_pic_irqsrc[pin].pin == irq) 1256 break; 1257 if (pin == sc->nirqs) { 1258 device_printf(sc->sc_dev, "Invalid interrupt number %u\n", irq); 1259 return (EINVAL); 1260 } 1261 1262 switch (dag->gpio_intr_mode) { 1263 case GPIO_INTR_LEVEL_LOW: 1264 case GPIO_INTR_LEVEL_HIGH: 1265 case GPIO_INTR_EDGE_RISING: 1266 case GPIO_INTR_EDGE_FALLING: 1267 case GPIO_INTR_EDGE_BOTH: 1268 break; 1269 default: 1270 device_printf(sc->sc_dev, "Unsupported interrupt mode 0x%8x\n", 1271 dag->gpio_intr_mode); 1272 return (EINVAL); 1273 } 1274 1275 *irqp = pin; 1276 if (mode != NULL) 1277 *mode = dag->gpio_intr_mode; 1278 1279 return (0); 1280 } 1281 1282 static int 1283 aw_gpio_pic_map_intr(device_t dev, struct intr_map_data *data, 1284 struct intr_irqsrc **isrcp) 1285 { 1286 struct aw_gpio_softc *sc; 1287 u_int irq; 1288 int err; 1289 1290 sc = device_get_softc(dev); 1291 switch (data->type) { 1292 case INTR_MAP_DATA_GPIO: 1293 err = aw_gpio_pic_map_gpio(sc, 1294 (struct intr_map_data_gpio *)data, 1295 &irq, NULL); 1296 break; 1297 default: 1298 return (ENOTSUP); 1299 }; 1300 1301 if (err == 0) 1302 *isrcp = &sc->gpio_pic_irqsrc[irq].isrc; 1303 return (0); 1304 } 1305 1306 static int 1307 aw_gpio_pic_setup_intr(device_t dev, struct intr_irqsrc *isrc, 1308 struct resource *res, struct intr_map_data *data) 1309 { 1310 struct aw_gpio_softc *sc; 1311 uint32_t irqcfg; 1312 uint32_t pinidx, reg; 1313 u_int irq, mode; 1314 int err; 1315 1316 sc = device_get_softc(dev); 1317 1318 err = 0; 1319 switch (data->type) { 1320 case INTR_MAP_DATA_GPIO: 1321 err = aw_gpio_pic_map_gpio(sc, 1322 (struct intr_map_data_gpio *)data, 1323 &irq, &mode); 1324 if (err != 0) 1325 return (err); 1326 break; 1327 default: 1328 return (ENOTSUP); 1329 }; 1330 1331 pinidx = (sc->gpio_pic_irqsrc[irq].intnum % 8) * 4; 1332 1333 AW_GPIO_LOCK(sc); 1334 switch (mode) { 1335 case GPIO_INTR_LEVEL_LOW: 1336 irqcfg = AW_GPIO_INT_LEVEL_LOW << pinidx; 1337 break; 1338 case GPIO_INTR_LEVEL_HIGH: 1339 irqcfg = AW_GPIO_INT_LEVEL_HIGH << pinidx; 1340 break; 1341 case GPIO_INTR_EDGE_RISING: 1342 irqcfg = AW_GPIO_INT_EDGE_POSITIVE << pinidx; 1343 break; 1344 case GPIO_INTR_EDGE_FALLING: 1345 irqcfg = AW_GPIO_INT_EDGE_NEGATIVE << pinidx; 1346 break; 1347 case GPIO_INTR_EDGE_BOTH: 1348 irqcfg = AW_GPIO_INT_EDGE_BOTH << pinidx; 1349 break; 1350 } 1351 1352 /* Switch the pin to interrupt mode */ 1353 sc->gpio_pic_irqsrc[irq].oldfunc = aw_gpio_get_function(sc, 1354 sc->gpio_pic_irqsrc[irq].pin); 1355 aw_gpio_set_function(sc, sc->gpio_pic_irqsrc[irq].pin, 1356 sc->gpio_pic_irqsrc[irq].intfunc); 1357 1358 /* Write interrupt mode */ 1359 reg = AW_GPIO_READ(sc, 1360 AW_GPIO_GP_INT_CFG(sc->gpio_pic_irqsrc[irq].bank, 1361 sc->gpio_pic_irqsrc[irq].intnum)); 1362 reg &= ~(0xF << pinidx); 1363 reg |= irqcfg; 1364 AW_GPIO_WRITE(sc, 1365 AW_GPIO_GP_INT_CFG(sc->gpio_pic_irqsrc[irq].bank, 1366 sc->gpio_pic_irqsrc[irq].intnum), 1367 reg); 1368 1369 AW_GPIO_UNLOCK(sc); 1370 1371 return (0); 1372 } 1373 1374 static int 1375 aw_gpio_pic_teardown_intr(device_t dev, struct intr_irqsrc *isrc, 1376 struct resource *res, struct intr_map_data *data) 1377 { 1378 struct aw_gpio_softc *sc; 1379 struct gpio_irqsrc *gi; 1380 1381 sc = device_get_softc(dev); 1382 gi = (struct gpio_irqsrc *)isrc; 1383 1384 /* Switch back the pin to it's original function */ 1385 AW_GPIO_LOCK(sc); 1386 aw_gpio_set_function(sc, gi->pin, gi->oldfunc); 1387 AW_GPIO_UNLOCK(sc); 1388 1389 return (0); 1390 } 1391 1392 static void 1393 aw_gpio_pic_post_filter(device_t dev, struct intr_irqsrc *isrc) 1394 { 1395 struct aw_gpio_softc *sc; 1396 struct gpio_irqsrc *gi; 1397 1398 sc = device_get_softc(dev); 1399 gi = (struct gpio_irqsrc *)isrc; 1400 1401 arm_irq_memory_barrier(0); 1402 AW_GPIO_WRITE(sc, AW_GPIO_GP_INT_STA(gi->bank), 1 << gi->intnum); 1403 } 1404 1405 static void 1406 aw_gpio_pic_post_ithread(device_t dev, struct intr_irqsrc *isrc) 1407 { 1408 struct aw_gpio_softc *sc; 1409 struct gpio_irqsrc *gi; 1410 1411 sc = device_get_softc(dev); 1412 gi = (struct gpio_irqsrc *)isrc; 1413 1414 arm_irq_memory_barrier(0); 1415 AW_GPIO_WRITE(sc, AW_GPIO_GP_INT_STA(gi->bank), 1 << gi->intnum); 1416 aw_gpio_pic_enable_intr(dev, isrc); 1417 } 1418 1419 static void 1420 aw_gpio_pic_pre_ithread(device_t dev, struct intr_irqsrc *isrc) 1421 { 1422 struct aw_gpio_softc *sc; 1423 1424 sc = device_get_softc(dev); 1425 aw_gpio_pic_disable_intr_locked(sc, isrc); 1426 } 1427 1428 /* 1429 * OFWBUS Interface 1430 */ 1431 static phandle_t 1432 aw_gpio_get_node(device_t dev, device_t bus) 1433 { 1434 1435 /* We only have one child, the GPIO bus, which needs our own node. */ 1436 return (ofw_bus_get_node(dev)); 1437 } 1438 1439 static device_method_t aw_gpio_methods[] = { 1440 /* Device interface */ 1441 DEVMETHOD(device_probe, aw_gpio_probe), 1442 DEVMETHOD(device_attach, aw_gpio_attach), 1443 DEVMETHOD(device_detach, aw_gpio_detach), 1444 1445 /* Interrupt controller interface */ 1446 DEVMETHOD(pic_disable_intr, aw_gpio_pic_disable_intr), 1447 DEVMETHOD(pic_enable_intr, aw_gpio_pic_enable_intr), 1448 DEVMETHOD(pic_map_intr, aw_gpio_pic_map_intr), 1449 DEVMETHOD(pic_setup_intr, aw_gpio_pic_setup_intr), 1450 DEVMETHOD(pic_teardown_intr, aw_gpio_pic_teardown_intr), 1451 DEVMETHOD(pic_post_filter, aw_gpio_pic_post_filter), 1452 DEVMETHOD(pic_post_ithread, aw_gpio_pic_post_ithread), 1453 DEVMETHOD(pic_pre_ithread, aw_gpio_pic_pre_ithread), 1454 1455 /* GPIO protocol */ 1456 DEVMETHOD(gpio_get_bus, aw_gpio_get_bus), 1457 DEVMETHOD(gpio_pin_max, aw_gpio_pin_max), 1458 DEVMETHOD(gpio_pin_getname, aw_gpio_pin_getname), 1459 DEVMETHOD(gpio_pin_getflags, aw_gpio_pin_getflags), 1460 DEVMETHOD(gpio_pin_getcaps, aw_gpio_pin_getcaps), 1461 DEVMETHOD(gpio_pin_setflags, aw_gpio_pin_setflags), 1462 DEVMETHOD(gpio_pin_get, aw_gpio_pin_get), 1463 DEVMETHOD(gpio_pin_set, aw_gpio_pin_set), 1464 DEVMETHOD(gpio_pin_toggle, aw_gpio_pin_toggle), 1465 DEVMETHOD(gpio_pin_access_32, aw_gpio_pin_access_32), 1466 DEVMETHOD(gpio_pin_config_32, aw_gpio_pin_config_32), 1467 DEVMETHOD(gpio_map_gpios, aw_gpio_map_gpios), 1468 1469 /* ofw_bus interface */ 1470 DEVMETHOD(ofw_bus_get_node, aw_gpio_get_node), 1471 1472 /* fdt_pinctrl interface */ 1473 DEVMETHOD(fdt_pinctrl_configure,aw_fdt_configure_pins), 1474 1475 DEVMETHOD_END 1476 }; 1477 1478 static devclass_t aw_gpio_devclass; 1479 1480 static driver_t aw_gpio_driver = { 1481 "gpio", 1482 aw_gpio_methods, 1483 sizeof(struct aw_gpio_softc), 1484 }; 1485 1486 EARLY_DRIVER_MODULE(aw_gpio, simplebus, aw_gpio_driver, aw_gpio_devclass, 0, 0, 1487 BUS_PASS_INTERRUPT + BUS_PASS_ORDER_LATE); 1488