1 /* $NetBSD: pxa2x0_gpio.c,v 1.21 2021/08/07 16:18:46 thorpej Exp $ */ 2 3 /* 4 * Copyright 2003 Wasabi Systems, Inc. 5 * All rights reserved. 6 * 7 * Written by Steve C. Woodford for Wasabi Systems, Inc. 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 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed for the NetBSD Project by 20 * Wasabi Systems, Inc. 21 * 4. The name of Wasabi Systems, Inc. may not be used to endorse 22 * or promote products derived from this software without specific prior 23 * written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC 29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 35 * POSSIBILITY OF SUCH DAMAGE. 36 */ 37 38 #include <sys/cdefs.h> 39 __KERNEL_RCSID(0, "$NetBSD: pxa2x0_gpio.c,v 1.21 2021/08/07 16:18:46 thorpej Exp $"); 40 41 #include "gpio.h" 42 #include "opt_pxa2x0_gpio.h" 43 44 #include <sys/param.h> 45 #include <sys/systm.h> 46 #include <sys/device.h> 47 #include <sys/kmem.h> 48 49 #include <machine/intr.h> 50 #include <sys/bus.h> 51 52 #include <arm/xscale/pxa2x0cpu.h> 53 #include <arm/xscale/pxa2x0reg.h> 54 #include <arm/xscale/pxa2x0var.h> 55 #include <arm/xscale/pxa2x0_gpio.h> 56 57 #include "locators.h" 58 59 #include <sys/gpio.h> 60 #include <dev/gpio/gpiovar.h> 61 62 struct gpio_irq_handler { 63 struct gpio_irq_handler *gh_next; 64 int (*gh_func)(void *); 65 void *gh_arg; 66 int gh_spl; 67 u_int gh_gpio; 68 int gh_level; 69 }; 70 71 struct pxagpio_softc { 72 device_t sc_dev; 73 bus_space_tag_t sc_bust; 74 bus_space_handle_t sc_bush; 75 void *sc_irqcookie[4]; 76 uint32_t sc_mask[4]; 77 #ifdef PXAGPIO_HAS_GPION_INTRS 78 struct gpio_irq_handler *sc_handlers[GPIO_NPINS]; 79 #else 80 struct gpio_irq_handler *sc_handlers[2]; 81 #endif 82 struct gpio_chipset_tag sc_gpio_gc; 83 gpio_pin_t sc_gpio_pins[GPIO_NPINS]; 84 }; 85 86 static int pxagpio_match(device_t, cfdata_t, void *); 87 static void pxagpio_attach(device_t, device_t, void *); 88 89 #if NGPIO > 0 90 static int pxa2x0_gpio_pin_read(void *, int); 91 static void pxa2x0_gpio_pin_write(void *, int, int); 92 static void pxa2x0_gpio_pin_ctl(void *, int, int); 93 #endif 94 95 CFATTACH_DECL_NEW(pxagpio, sizeof(struct pxagpio_softc), 96 pxagpio_match, pxagpio_attach, NULL, NULL); 97 98 static struct pxagpio_softc *pxagpio_softc; 99 static vaddr_t pxagpio_regs; 100 #define GPIO_BOOTSTRAP_REG(reg) \ 101 (*((volatile uint32_t *)(pxagpio_regs + (reg)))) 102 103 static int gpio_intr0(void *); 104 static int gpio_intr1(void *); 105 #ifdef PXAGPIO_HAS_GPION_INTRS 106 static int gpio_dispatch(struct pxagpio_softc *, int); 107 static int gpio_intrN(void *); 108 #endif 109 110 static inline uint32_t 111 pxagpio_reg_read(struct pxagpio_softc *sc, int reg) 112 { 113 if (__predict_true(sc != NULL)) 114 return (bus_space_read_4(sc->sc_bust, sc->sc_bush, reg)); 115 else 116 if (pxagpio_regs) 117 return (GPIO_BOOTSTRAP_REG(reg)); 118 panic("pxagpio_reg_read: not bootstrapped"); 119 } 120 121 static inline void 122 pxagpio_reg_write(struct pxagpio_softc *sc, int reg, uint32_t val) 123 { 124 if (__predict_true(sc != NULL)) 125 bus_space_write_4(sc->sc_bust, sc->sc_bush, reg, val); 126 else 127 if (pxagpio_regs) 128 GPIO_BOOTSTRAP_REG(reg) = val; 129 else 130 panic("pxagpio_reg_write: not bootstrapped"); 131 return; 132 } 133 134 static int 135 pxagpio_match(device_t parent, cfdata_t cf, void *aux) 136 { 137 struct pxaip_attach_args *pxa = aux; 138 139 if (pxagpio_softc != NULL || pxa->pxa_addr != PXA2X0_GPIO_BASE) 140 return (0); 141 142 pxa->pxa_size = PXA2X0_GPIO_SIZE; 143 144 return (1); 145 } 146 147 static void 148 pxagpio_attach(device_t parent, device_t self, void *aux) 149 { 150 struct pxagpio_softc *sc = device_private(self); 151 struct pxaip_attach_args *pxa = aux; 152 #if NGPIO > 0 153 struct gpiobus_attach_args gba; 154 int pin, maxpin; 155 u_int func; 156 #endif 157 158 sc->sc_dev = self; 159 sc->sc_bust = pxa->pxa_iot; 160 161 aprint_normal(": GPIO Controller\n"); 162 163 if (bus_space_map(sc->sc_bust, pxa->pxa_addr, pxa->pxa_size, 0, 164 &sc->sc_bush)) { 165 aprint_error_dev(self, "Can't map registers!\n"); 166 return; 167 } 168 169 pxagpio_regs = (vaddr_t)bus_space_vaddr(sc->sc_bust, sc->sc_bush); 170 171 memset(sc->sc_handlers, 0, sizeof(sc->sc_handlers)); 172 173 /* 174 * Disable all GPIO interrupts 175 */ 176 pxagpio_reg_write(sc, GPIO_GRER0, 0); 177 pxagpio_reg_write(sc, GPIO_GRER1, 0); 178 pxagpio_reg_write(sc, GPIO_GRER2, 0); 179 pxagpio_reg_write(sc, GPIO_GFER0, 0); 180 pxagpio_reg_write(sc, GPIO_GFER1, 0); 181 pxagpio_reg_write(sc, GPIO_GFER2, 0); 182 pxagpio_reg_write(sc, GPIO_GEDR0, ~0); 183 pxagpio_reg_write(sc, GPIO_GEDR1, ~0); 184 pxagpio_reg_write(sc, GPIO_GEDR2, ~0); 185 #ifdef CPU_XSCALE_PXA270 186 if (CPU_IS_PXA270) { 187 pxagpio_reg_write(sc, GPIO_GRER3, 0); 188 pxagpio_reg_write(sc, GPIO_GFER3, 0); 189 pxagpio_reg_write(sc, GPIO_GEDR3, ~0); 190 } 191 #endif 192 193 #ifdef PXAGPIO_HAS_GPION_INTRS 194 sc->sc_irqcookie[2] = pxa2x0_intr_establish(PXA2X0_INT_GPION, IPL_BIO, 195 gpio_intrN, sc); 196 if (sc->sc_irqcookie[2] == NULL) { 197 aprint_error_dev(self, "failed to hook main GPIO interrupt\n"); 198 return; 199 } 200 #endif 201 202 sc->sc_irqcookie[0] = sc->sc_irqcookie[1] = NULL; 203 204 pxagpio_softc = sc; 205 #if NGPIO > 0 206 #if defined(CPU_XSCALE_PXA250) && defined(CPU_XSCALE_PXA270) 207 maxpin = CPU_IS_PXA270 ? PXA270_GPIO_NPINS : PXA250_GPIO_NPINS; 208 #else 209 maxpin = GPIO_NPINS; 210 #endif 211 for (pin = 0; pin < maxpin; ++pin) { 212 213 sc->sc_gpio_pins[pin].pin_num = pin; 214 func = pxa2x0_gpio_get_function(pin); 215 216 if (GPIO_IS_GPIO(func)) { 217 sc->sc_gpio_pins[pin].pin_caps = GPIO_PIN_INPUT | 218 GPIO_PIN_OUTPUT; 219 sc->sc_gpio_pins[pin].pin_state = 220 pxa2x0_gpio_pin_read(sc, pin); 221 } else { 222 sc->sc_gpio_pins[pin].pin_caps = 0; 223 sc->sc_gpio_pins[pin].pin_state = 0; 224 } 225 } 226 227 /* create controller tag */ 228 sc->sc_gpio_gc.gp_cookie = sc; 229 sc->sc_gpio_gc.gp_pin_read = pxa2x0_gpio_pin_read; 230 sc->sc_gpio_gc.gp_pin_write = pxa2x0_gpio_pin_write; 231 sc->sc_gpio_gc.gp_pin_ctl = pxa2x0_gpio_pin_ctl; 232 233 gba.gba_gc = &sc->sc_gpio_gc; 234 gba.gba_pins = sc->sc_gpio_pins; 235 gba.gba_npins = maxpin; 236 237 config_found(self, &gba, gpiobus_print, CFARGS_NONE); 238 #else 239 aprint_normal_dev(sc->sc_dev, "no GPIO configured in kernel\n"); 240 #endif 241 } 242 243 void 244 pxa2x0_gpio_bootstrap(vaddr_t gpio_regs) 245 { 246 247 pxagpio_regs = gpio_regs; 248 } 249 250 void * 251 pxa2x0_gpio_intr_establish(u_int gpio, int level, int spl, int (*func)(void *), 252 void *arg) 253 { 254 struct pxagpio_softc *sc = pxagpio_softc; 255 struct gpio_irq_handler *gh; 256 uint32_t bit, reg; 257 258 #ifdef PXAGPIO_HAS_GPION_INTRS 259 if (gpio >= GPIO_NPINS) 260 panic("pxa2x0_gpio_intr_establish: bad pin number: %d", gpio); 261 #else 262 if (gpio > 1) 263 panic("pxa2x0_gpio_intr_establish: bad pin number: %d", gpio); 264 #endif 265 266 if (!GPIO_IS_GPIO_IN(pxa2x0_gpio_get_function(gpio))) 267 panic("pxa2x0_gpio_intr_establish: Pin %d not GPIO_IN", gpio); 268 269 switch (level) { 270 case IST_EDGE_FALLING: 271 case IST_EDGE_RISING: 272 case IST_EDGE_BOTH: 273 break; 274 275 default: 276 panic("pxa2x0_gpio_intr_establish: bad level: %d", level); 277 break; 278 } 279 280 if (sc->sc_handlers[gpio] != NULL) 281 panic("pxa2x0_gpio_intr_establish: illegal shared interrupt"); 282 283 gh = kmem_alloc(sizeof(*gh), KM_SLEEP); 284 gh->gh_func = func; 285 gh->gh_arg = arg; 286 gh->gh_spl = spl; 287 gh->gh_gpio = gpio; 288 gh->gh_level = level; 289 gh->gh_next = sc->sc_handlers[gpio]; 290 sc->sc_handlers[gpio] = gh; 291 292 if (gpio == 0) { 293 KDASSERT(sc->sc_irqcookie[0] == NULL); 294 sc->sc_irqcookie[0] = pxa2x0_intr_establish(PXA2X0_INT_GPIO0, 295 spl, gpio_intr0, sc); 296 KDASSERT(sc->sc_irqcookie[0]); 297 } else 298 if (gpio == 1) { 299 KDASSERT(sc->sc_irqcookie[1] == NULL); 300 sc->sc_irqcookie[1] = pxa2x0_intr_establish(PXA2X0_INT_GPIO1, 301 spl, gpio_intr1, sc); 302 KDASSERT(sc->sc_irqcookie[1]); 303 } 304 305 bit = GPIO_BIT(gpio); 306 sc->sc_mask[GPIO_BANK(gpio)] |= bit; 307 308 switch (level) { 309 case IST_EDGE_FALLING: 310 reg = pxagpio_reg_read(sc, GPIO_REG(GPIO_GFER0, gpio)); 311 pxagpio_reg_write(sc, GPIO_REG(GPIO_GFER0, gpio), reg | bit); 312 break; 313 314 case IST_EDGE_RISING: 315 reg = pxagpio_reg_read(sc, GPIO_REG(GPIO_GRER0, gpio)); 316 pxagpio_reg_write(sc, GPIO_REG(GPIO_GRER0, gpio), reg | bit); 317 break; 318 319 case IST_EDGE_BOTH: 320 reg = pxagpio_reg_read(sc, GPIO_REG(GPIO_GFER0, gpio)); 321 pxagpio_reg_write(sc, GPIO_REG(GPIO_GFER0, gpio), reg | bit); 322 reg = pxagpio_reg_read(sc, GPIO_REG(GPIO_GRER0, gpio)); 323 pxagpio_reg_write(sc, GPIO_REG(GPIO_GRER0, gpio), reg | bit); 324 break; 325 } 326 327 return (gh); 328 } 329 330 void 331 pxa2x0_gpio_intr_disestablish(void *cookie) 332 { 333 struct pxagpio_softc *sc = pxagpio_softc; 334 struct gpio_irq_handler *gh = cookie; 335 uint32_t bit, reg; 336 337 bit = GPIO_BIT(gh->gh_gpio); 338 339 reg = pxagpio_reg_read(sc, GPIO_REG(GPIO_GFER0, gh->gh_gpio)); 340 reg &= ~bit; 341 pxagpio_reg_write(sc, GPIO_REG(GPIO_GFER0, gh->gh_gpio), reg); 342 reg = pxagpio_reg_read(sc, GPIO_REG(GPIO_GRER0, gh->gh_gpio)); 343 reg &= ~bit; 344 pxagpio_reg_write(sc, GPIO_REG(GPIO_GRER0, gh->gh_gpio), reg); 345 346 pxagpio_reg_write(sc, GPIO_REG(GPIO_GEDR0, gh->gh_gpio), bit); 347 348 sc->sc_mask[GPIO_BANK(gh->gh_gpio)] &= ~bit; 349 sc->sc_handlers[gh->gh_gpio] = NULL; 350 351 if (gh->gh_gpio == 0) { 352 #if 0 353 pxa2x0_intr_disestablish(sc->sc_irqcookie[0]); 354 sc->sc_irqcookie[0] = NULL; 355 #else 356 panic("pxa2x0_gpio_intr_disestablish: can't unhook GPIO#0"); 357 #endif 358 } else 359 if (gh->gh_gpio == 1) { 360 #if 0 361 pxa2x0_intr_disestablish(sc->sc_irqcookie[1]); 362 sc->sc_irqcookie[1] = NULL; 363 #else 364 panic("pxa2x0_gpio_intr_disestablish: can't unhook GPIO#1"); 365 #endif 366 } 367 368 kmem_free(gh, sizeof(*gh)); 369 } 370 371 static int 372 gpio_intr0(void *arg) 373 { 374 struct pxagpio_softc *sc = arg; 375 376 #ifdef DIAGNOSTIC 377 if (sc->sc_handlers[0] == NULL) { 378 aprint_error_dev(sc->sc_dev, "stray GPIO#0 edge interrupt\n"); 379 return (0); 380 } 381 #endif 382 383 bus_space_write_4(sc->sc_bust, sc->sc_bush, GPIO_REG(GPIO_GEDR0, 0), 384 GPIO_BIT(0)); 385 386 return ((sc->sc_handlers[0]->gh_func)(sc->sc_handlers[0]->gh_arg)); 387 } 388 389 static int 390 gpio_intr1(void *arg) 391 { 392 struct pxagpio_softc *sc = arg; 393 394 #ifdef DIAGNOSTIC 395 if (sc->sc_handlers[1] == NULL) { 396 aprint_error_dev(sc->sc_dev, "stray GPIO#1 edge interrupt\n"); 397 return (0); 398 } 399 #endif 400 401 bus_space_write_4(sc->sc_bust, sc->sc_bush, GPIO_REG(GPIO_GEDR0, 1), 402 GPIO_BIT(1)); 403 404 return ((sc->sc_handlers[1]->gh_func)(sc->sc_handlers[1]->gh_arg)); 405 } 406 407 #ifdef PXAGPIO_HAS_GPION_INTRS 408 static int 409 gpio_dispatch(struct pxagpio_softc *sc, int gpio_base) 410 { 411 struct gpio_irq_handler **ghp, *gh; 412 int i, s, nhandled, handled, pins; 413 uint32_t gedr, mask; 414 int bank; 415 416 /* Fetch bitmap of pending interrupts on this GPIO bank */ 417 gedr = pxagpio_reg_read(sc, GPIO_REG(GPIO_GEDR0, gpio_base)); 418 419 /* Don't handle GPIO 0/1 here */ 420 if (gpio_base == 0) 421 gedr &= ~(GPIO_BIT(0) | GPIO_BIT(1)); 422 423 /* Bail early if there are no pending interrupts in this bank */ 424 if (gedr == 0) 425 return (0); 426 427 /* Acknowledge pending interrupts. */ 428 pxagpio_reg_write(sc, GPIO_REG(GPIO_GEDR0, gpio_base), gedr); 429 430 bank = GPIO_BANK(gpio_base); 431 432 /* 433 * We're only interested in those for which we have a handler 434 * registered 435 */ 436 #ifdef DEBUG 437 if ((gedr & sc->sc_mask[bank]) == 0) { 438 aprint_error_dev(sc->sc_dev, 439 "stray GPIO interrupt. Bank %d, GEDR 0x%08x, mask 0x%08x\n", 440 bank, gedr, sc->sc_mask[bank]); 441 return (1); /* XXX: Pretend we dealt with it */ 442 } 443 #endif 444 445 gedr &= sc->sc_mask[bank]; 446 ghp = &sc->sc_handlers[gpio_base]; 447 if (CPU_IS_PXA270) 448 pins = (gpio_base < 96) ? 32 : 25; 449 else 450 pins = (gpio_base < 64) ? 32 : 17; 451 handled = 0; 452 453 for (i = 0, mask = 1; i < pins && gedr; i++, ghp++, mask <<= 1) { 454 if ((gedr & mask) == 0) 455 continue; 456 gedr &= ~mask; 457 458 if ((gh = *ghp) == NULL) { 459 aprint_error_dev(sc->sc_dev, 460 "unhandled GPIO interrupt. GPIO#%d\n", 461 gpio_base + i); 462 continue; 463 } 464 465 s = _splraise(gh->gh_spl); 466 do { 467 nhandled = (gh->gh_func)(gh->gh_arg); 468 handled |= nhandled; 469 gh = gh->gh_next; 470 } while (gh != NULL); 471 splx(s); 472 } 473 474 return (handled); 475 } 476 477 static int 478 gpio_intrN(void *arg) 479 { 480 struct pxagpio_softc *sc = arg; 481 int handled; 482 483 handled = gpio_dispatch(sc, 0); 484 handled |= gpio_dispatch(sc, 32); 485 handled |= gpio_dispatch(sc, 64); 486 if (CPU_IS_PXA270) 487 handled |= gpio_dispatch(sc, 96); 488 return (handled); 489 } 490 #endif /* PXAGPIO_HAS_GPION_INTRS */ 491 492 u_int 493 pxa2x0_gpio_get_function(u_int gpio) 494 { 495 struct pxagpio_softc *sc = pxagpio_softc; 496 uint32_t rv, io; 497 498 KDASSERT(gpio < GPIO_NPINS); 499 500 rv = pxagpio_reg_read(sc, GPIO_FN_REG(gpio)) >> GPIO_FN_SHIFT(gpio); 501 rv = GPIO_FN(rv); 502 503 io = pxagpio_reg_read(sc, GPIO_REG(GPIO_GPDR0, gpio)); 504 if (io & GPIO_BIT(gpio)) 505 rv |= GPIO_OUT; 506 507 io = pxagpio_reg_read(sc, GPIO_REG(GPIO_GPLR0, gpio)); 508 if (io & GPIO_BIT(gpio)) 509 rv |= GPIO_SET; 510 511 return (rv); 512 } 513 514 u_int 515 pxa2x0_gpio_set_function(u_int gpio, u_int fn) 516 { 517 struct pxagpio_softc *sc = pxagpio_softc; 518 uint32_t rv, bit; 519 u_int oldfn; 520 521 KDASSERT(gpio < GPIO_NPINS); 522 523 oldfn = pxa2x0_gpio_get_function(gpio); 524 525 if (GPIO_FN(fn) == GPIO_FN(oldfn) && 526 GPIO_FN_IS_OUT(fn) == GPIO_FN_IS_OUT(oldfn)) { 527 /* 528 * The pin's function is not changing. 529 * For Alternate Functions and GPIO input, we can just 530 * return now. 531 * For GPIO output pins, check the initial state is 532 * the same. 533 * 534 * Return 'fn' instead of 'oldfn' so the caller can 535 * reliably detect that we didn't change anything. 536 * (The initial state might be different for non- 537 * GPIO output pins). 538 */ 539 if (!GPIO_IS_GPIO_OUT(fn) || 540 GPIO_FN_IS_SET(fn) == GPIO_FN_IS_SET(oldfn)) 541 return (fn); 542 } 543 544 /* 545 * See section 4.1.3.7 of the PXA2x0 Developer's Manual for 546 * the correct procedure for changing GPIO pin functions. 547 */ 548 549 bit = GPIO_BIT(gpio); 550 551 /* 552 * 1. Configure the correct set/clear state of the pin 553 */ 554 if (GPIO_FN_IS_SET(fn)) 555 pxagpio_reg_write(sc, GPIO_REG(GPIO_GPSR0, gpio), bit); 556 else 557 pxagpio_reg_write(sc, GPIO_REG(GPIO_GPCR0, gpio), bit); 558 559 /* 560 * 2. Configure the pin as an input or output as appropriate 561 */ 562 rv = pxagpio_reg_read(sc, GPIO_REG(GPIO_GPDR0, gpio)) & ~bit; 563 if (GPIO_FN_IS_OUT(fn)) 564 rv |= bit; 565 pxagpio_reg_write(sc, GPIO_REG(GPIO_GPDR0, gpio), rv); 566 567 /* 568 * 3. Configure the pin's function 569 */ 570 bit = GPIO_FN_MASK << GPIO_FN_SHIFT(gpio); 571 fn = GPIO_FN(fn) << GPIO_FN_SHIFT(gpio); 572 rv = pxagpio_reg_read(sc, GPIO_FN_REG(gpio)) & ~bit; 573 pxagpio_reg_write(sc, GPIO_FN_REG(gpio), rv | fn); 574 575 return (oldfn); 576 } 577 578 /* 579 * Quick function to read pin value 580 */ 581 int 582 pxa2x0_gpio_get_bit(u_int gpio) 583 { 584 struct pxagpio_softc *sc = pxagpio_softc; 585 int bit; 586 587 bit = GPIO_BIT(gpio); 588 if (pxagpio_reg_read(sc, GPIO_REG(GPIO_GPLR0, gpio)) & bit) 589 return 1; 590 else 591 return 0; 592 } 593 594 /* 595 * Quick function to set pin to 1 596 */ 597 void 598 pxa2x0_gpio_set_bit(u_int gpio) 599 { 600 struct pxagpio_softc *sc = pxagpio_softc; 601 int bit; 602 603 bit = GPIO_BIT(gpio); 604 pxagpio_reg_write(sc, GPIO_REG(GPIO_GPSR0, gpio), bit); 605 } 606 607 /* 608 * Quick function to set pin to 0 609 */ 610 void 611 pxa2x0_gpio_clear_bit(u_int gpio) 612 { 613 struct pxagpio_softc *sc = pxagpio_softc; 614 int bit; 615 616 bit = GPIO_BIT(gpio); 617 pxagpio_reg_write(sc, GPIO_REG(GPIO_GPCR0, gpio), bit); 618 } 619 620 /* 621 * Quick function to change pin direction 622 */ 623 void 624 pxa2x0_gpio_set_dir(u_int gpio, int dir) 625 { 626 struct pxagpio_softc *sc = pxagpio_softc; 627 int bit; 628 uint32_t reg; 629 630 bit = GPIO_BIT(gpio); 631 632 reg = pxagpio_reg_read(sc, GPIO_REG(GPIO_GPDR0, gpio)) & ~bit; 633 if (GPIO_FN_IS_OUT(dir)) 634 reg |= bit; 635 pxagpio_reg_write(sc, GPIO_REG(GPIO_GPDR0, gpio), reg); 636 } 637 638 /* 639 * Quick function to clear interrupt status on a pin 640 * GPIO pins may be toggle in an interrupt and we dont want 641 * extra spurious interrupts to occur. 642 * Suppose this causes a slight race if a key is pressed while 643 * the interrupt handler is running. (yes this is for the keyboard driver) 644 */ 645 void 646 pxa2x0_gpio_clear_intr(u_int gpio) 647 { 648 struct pxagpio_softc *sc = pxagpio_softc; 649 int bit; 650 651 bit = GPIO_BIT(gpio); 652 pxagpio_reg_write(sc, GPIO_REG(GPIO_GEDR0, gpio), bit); 653 } 654 655 /* 656 * Quick function to mask (disable) a GPIO interrupt 657 */ 658 void 659 pxa2x0_gpio_intr_mask(void *v) 660 { 661 struct gpio_irq_handler *gh = (struct gpio_irq_handler *)v; 662 663 pxa2x0_gpio_set_intr_level(gh->gh_gpio, IPL_NONE); 664 } 665 666 /* 667 * Quick function to unmask (enable) a GPIO interrupt 668 */ 669 void 670 pxa2x0_gpio_intr_unmask(void *v) 671 { 672 struct gpio_irq_handler *gh = (struct gpio_irq_handler *)v; 673 674 pxa2x0_gpio_set_intr_level(gh->gh_gpio, gh->gh_level); 675 } 676 677 /* 678 * Configure the edge sensitivity of interrupt pins 679 */ 680 void 681 pxa2x0_gpio_set_intr_level(u_int gpio, int level) 682 { 683 struct pxagpio_softc *sc = pxagpio_softc; 684 uint32_t bit; 685 uint32_t gfer; 686 uint32_t grer; 687 int s; 688 689 s = splhigh(); 690 691 bit = GPIO_BIT(gpio); 692 gfer = pxagpio_reg_read(sc, GPIO_REG(GPIO_GFER0, gpio)); 693 grer = pxagpio_reg_read(sc, GPIO_REG(GPIO_GRER0, gpio)); 694 695 switch (level) { 696 case IST_NONE: 697 gfer &= ~bit; 698 grer &= ~bit; 699 break; 700 case IST_EDGE_FALLING: 701 gfer |= bit; 702 grer &= ~bit; 703 break; 704 case IST_EDGE_RISING: 705 gfer &= ~bit; 706 grer |= bit; 707 break; 708 case IST_EDGE_BOTH: 709 gfer |= bit; 710 grer |= bit; 711 break; 712 default: 713 panic("pxa2x0_gpio_set_intr_level: bad level: %d", level); 714 break; 715 } 716 717 pxagpio_reg_write(sc, GPIO_REG(GPIO_GFER0, gpio), gfer); 718 pxagpio_reg_write(sc, GPIO_REG(GPIO_GRER0, gpio), grer); 719 720 splx(s); 721 } 722 723 #if NGPIO > 0 724 /* GPIO support functions */ 725 static int 726 pxa2x0_gpio_pin_read(void *arg, int pin) 727 { 728 return pxa2x0_gpio_get_bit(pin); 729 } 730 731 static void 732 pxa2x0_gpio_pin_write(void *arg, int pin, int value) 733 { 734 if (value == GPIO_PIN_HIGH) { 735 pxa2x0_gpio_set_bit(pin); 736 } else { 737 pxa2x0_gpio_clear_bit(pin); 738 } 739 } 740 741 static void 742 pxa2x0_gpio_pin_ctl(void *arg, int pin, int flags) 743 { 744 if (flags & GPIO_PIN_OUTPUT) { 745 pxa2x0_gpio_set_function(pin, GPIO_OUT); 746 } else if (flags & GPIO_PIN_INPUT) { 747 pxa2x0_gpio_set_function(pin, GPIO_IN); 748 } 749 } 750 #endif 751 752 #if defined(CPU_XSCALE_PXA250) 753 /* 754 * Configurations of GPIO for PXA25x 755 */ 756 struct pxa2x0_gpioconf pxa25x_com_btuart_gpioconf[] = { 757 { 42, GPIO_CLR | GPIO_ALT_FN_1_IN }, /* BTRXD */ 758 { 43, GPIO_CLR | GPIO_ALT_FN_2_OUT }, /* BTTXD */ 759 760 #if 0 /* optional */ 761 { 44, GPIO_CLR | GPIO_ALT_FN_1_IN }, /* BTCTS */ 762 { 45, GPIO_CLR | GPIO_ALT_FN_2_OUT }, /* BTRTS */ 763 #endif 764 765 { -1 } 766 }; 767 768 struct pxa2x0_gpioconf pxa25x_com_ffuart_gpioconf[] = { 769 { 34, GPIO_CLR | GPIO_ALT_FN_1_IN }, /* FFRXD */ 770 771 #if 0 /* optional */ 772 { 35, GPIO_CLR | GPIO_ALT_FN_1_IN }, /* CTS */ 773 { 36, GPIO_CLR | GPIO_ALT_FN_1_IN }, /* DCD */ 774 { 37, GPIO_CLR | GPIO_ALT_FN_1_IN }, /* DSR */ 775 { 38, GPIO_CLR | GPIO_ALT_FN_1_IN }, /* RI */ 776 #endif 777 778 { 39, GPIO_CLR | GPIO_ALT_FN_2_OUT }, /* FFTXD */ 779 780 #if 0 /* optional */ 781 { 40, GPIO_CLR | GPIO_ALT_FN_2_OUT }, /* DTR */ 782 { 41, GPIO_CLR | GPIO_ALT_FN_2_OUT }, /* RTS */ 783 #endif 784 785 { -1 } 786 }; 787 788 struct pxa2x0_gpioconf pxa25x_com_hwuart_gpioconf[] = { 789 #if 0 /* We can select and/or. */ 790 { 42, GPIO_CLR | GPIO_ALT_FN_3_IN }, /* HWRXD */ 791 { 49, GPIO_CLR | GPIO_ALT_FN_2_IN }, /* HWRXD */ 792 793 { 43, GPIO_CLR | GPIO_ALT_FN_3_OUT }, /* HWTXD */ 794 { 48, GPIO_CLR | GPIO_ALT_FN_1_OUT }, /* HWTXD */ 795 796 #if 0 /* optional */ 797 { 44, GPIO_CLR | GPIO_ALT_FN_3_IN }, /* HWCST */ 798 { 51, GPIO_CLR | GPIO_ALT_FN_3_IN }, /* HWCST */ 799 800 { 45, GPIO_CLR | GPIO_ALT_FN_3_OUT }, /* HWRST */ 801 { 52, GPIO_CLR | GPIO_ALT_FN_3_OUT }, /* HWRST */ 802 #endif 803 #endif 804 805 { -1 } 806 }; 807 808 struct pxa2x0_gpioconf pxa25x_com_stuart_gpioconf[] = { 809 { 46, GPIO_CLR | GPIO_ALT_FN_2_IN }, /* RXD */ 810 { 47, GPIO_CLR | GPIO_ALT_FN_1_OUT }, /* TXD */ 811 { -1 } 812 }; 813 814 struct pxa2x0_gpioconf pxa25x_i2c_gpioconf[] = { 815 { -1 } 816 }; 817 818 struct pxa2x0_gpioconf pxa25x_i2s_gpioconf[] = { 819 { 28, GPIO_CLR | GPIO_ALT_FN_1_OUT }, /* BITCLK */ 820 { 29, GPIO_CLR | GPIO_ALT_FN_2_IN }, /* SDATA_IN */ 821 { 30, GPIO_CLR | GPIO_ALT_FN_1_OUT }, /* SDATA_OUT */ 822 { 31, GPIO_CLR | GPIO_ALT_FN_1_OUT }, /* SYNC */ 823 { 32, GPIO_CLR | GPIO_ALT_FN_1_OUT }, /* SYSCLK */ 824 { -1 } 825 }; 826 827 struct pxa2x0_gpioconf pxa25x_pcic_gpioconf[] = { 828 { 48, GPIO_CLR | GPIO_ALT_FN_2_OUT }, /* nPOE */ 829 { 49, GPIO_CLR | GPIO_ALT_FN_2_OUT }, /* nPWE */ 830 { 50, GPIO_CLR | GPIO_ALT_FN_2_OUT }, /* nPIOR */ 831 { 51, GPIO_CLR | GPIO_ALT_FN_2_OUT }, /* nPIOW */ 832 833 #if 0 /* We can select and/or. */ 834 { 52, GPIO_CLR | GPIO_ALT_FN_2_OUT }, /* nPCE1 */ 835 { 53, GPIO_CLR | GPIO_ALT_FN_2_OUT }, /* nPCE2 */ 836 #endif 837 838 { 54, GPIO_CLR | GPIO_ALT_FN_2_OUT }, /* pSKTSEL */ 839 { 55, GPIO_CLR | GPIO_ALT_FN_2_OUT }, /* nPREG */ 840 { 56, GPIO_CLR | GPIO_ALT_FN_1_IN }, /* nPWAIT */ 841 { 57, GPIO_CLR | GPIO_ALT_FN_1_IN }, /* nIOIS16 */ 842 { -1 } 843 }; 844 845 struct pxa2x0_gpioconf pxa25x_pxaacu_gpioconf[] = { 846 { 28, GPIO_CLR | GPIO_ALT_FN_1_IN }, /* BITCLK */ 847 { 30, GPIO_CLR | GPIO_ALT_FN_2_OUT }, /* SDATA_OUT */ 848 { 31, GPIO_CLR | GPIO_ALT_FN_2_OUT }, /* SYNC */ 849 850 #if 0 /* We can select and/or. */ 851 { 29, GPIO_CLR | GPIO_ALT_FN_1_IN }, /* SDATA_IN0 */ 852 { 32, GPIO_CLR | GPIO_ALT_FN_1_IN }, /* SDATA_IN1 */ 853 #endif 854 855 { -1 } 856 }; 857 858 struct pxa2x0_gpioconf pxa25x_pxamci_gpioconf[] = { 859 #if 0 /* We can select and/or. */ 860 { 6, GPIO_CLR | GPIO_ALT_FN_1_OUT }, /* MMCCLK */ 861 { 53, GPIO_CLR | GPIO_ALT_FN_1_OUT }, /* MMCCLK */ 862 { 54, GPIO_CLR | GPIO_ALT_FN_1_OUT }, /* MMCCLK */ 863 864 { 8, GPIO_CLR | GPIO_ALT_FN_1_OUT }, /* MMCCS0 */ 865 { 34, GPIO_CLR | GPIO_ALT_FN_2_OUT }, /* MMCCS0 */ 866 { 67, GPIO_CLR | GPIO_ALT_FN_1_OUT }, /* MMCCS0 */ 867 868 { 9, GPIO_CLR | GPIO_ALT_FN_1_OUT }, /* MMCCS1 */ 869 { 39, GPIO_CLR | GPIO_ALT_FN_1_OUT }, /* MMCCS1 */ 870 { 68, GPIO_CLR | GPIO_ALT_FN_1_OUT }, /* MMCCS1 */ 871 #endif 872 873 { -1 } 874 }; 875 #endif 876 877 #if defined(CPU_XSCALE_PXA270) 878 /* 879 * Configurations of GPIO for PXA27x 880 */ 881 struct pxa2x0_gpioconf pxa27x_com_btuart_gpioconf[] = { 882 { 42, GPIO_CLR | GPIO_ALT_FN_1_IN }, /* BTRXD */ 883 { 43, GPIO_CLR | GPIO_ALT_FN_2_OUT }, /* BTTXD */ 884 885 #if 0 /* optional */ 886 { 44, GPIO_CLR | GPIO_ALT_FN_1_IN }, /* BTCTS */ 887 { 45, GPIO_CLR | GPIO_ALT_FN_2_OUT }, /* BTRTS */ 888 #endif 889 890 { -1 } 891 }; 892 893 struct pxa2x0_gpioconf pxa27x_com_ffuart_gpioconf[] = { 894 #if 0 /* We can select and/or. */ 895 { 16, GPIO_CLR | GPIO_ALT_FN_3_OUT }, /* FFTXD */ 896 { 37, GPIO_CLR | GPIO_ALT_FN_3_OUT }, /* FFTXD */ 897 { 39, GPIO_CLR | GPIO_ALT_FN_2_OUT }, /* FFTXD */ 898 { 83, GPIO_CLR | GPIO_ALT_FN_2_OUT }, /* FFTXD */ 899 { 99, GPIO_CLR | GPIO_ALT_FN_3_OUT }, /* FFTXD */ 900 901 { 19, GPIO_CLR | GPIO_ALT_FN_3_IN }, /* FFRXD */ 902 { 33, GPIO_CLR | GPIO_ALT_FN_1_IN }, /* FFRXD */ 903 { 34, GPIO_CLR | GPIO_ALT_FN_1_IN }, /* FFRXD */ 904 { 41, GPIO_CLR | GPIO_ALT_FN_1_IN }, /* FFRXD */ 905 { 53, GPIO_CLR | GPIO_ALT_FN_1_IN }, /* FFRXD */ 906 { 85, GPIO_CLR | GPIO_ALT_FN_1_IN }, /* FFRXD */ 907 { 96, GPIO_CLR | GPIO_ALT_FN_3_IN }, /* FFRXD */ 908 { 102, GPIO_CLR | GPIO_ALT_FN_3_IN }, /* FFRXD */ 909 910 { 9, GPIO_CLR | GPIO_ALT_FN_3_IN }, /* FFCTS */ 911 { 26, GPIO_CLR | GPIO_ALT_FN_3_IN }, /* FFCTS */ 912 { 35, GPIO_CLR | GPIO_ALT_FN_1_IN }, /* FFCTS */ 913 { 100, GPIO_CLR | GPIO_ALT_FN_3_IN }, /* FFCTS */ 914 915 { 27, GPIO_CLR | GPIO_ALT_FN_3_OUT }, /* FFRTS */ 916 { 41, GPIO_CLR | GPIO_ALT_FN_2_OUT }, /* FFRTS */ 917 { 83, GPIO_CLR | GPIO_ALT_FN_3_OUT }, /* FFRTS */ 918 { 98, GPIO_CLR | GPIO_ALT_FN_3_OUT }, /* FFRTS */ 919 920 { 40, GPIO_CLR | GPIO_ALT_FN_2_OUT }, /* FFDTR */ 921 { 82, GPIO_CLR | GPIO_ALT_FN_3_OUT }, /* FFDTR */ 922 923 { 36, GPIO_CLR | GPIO_ALT_FN_1_IN }, /* FFDCD */ 924 925 { 33, GPIO_CLR | GPIO_ALT_FN_2_IN }, /* FFDSR */ 926 { 37, GPIO_CLR | GPIO_ALT_FN_1_IN }, /* FFDSR */ 927 928 { 38, GPIO_CLR | GPIO_ALT_FN_1_IN }, /* FFRI */ 929 #endif 930 { -1 } 931 }; 932 933 struct pxa2x0_gpioconf pxa27x_com_stuart_gpioconf[] = { 934 { 46, GPIO_CLR | GPIO_ALT_FN_2_IN }, /* STD_RXD */ 935 { 47, GPIO_CLR | GPIO_ALT_FN_1_OUT }, /* STD_TXD */ 936 { -1 } 937 }; 938 939 struct pxa2x0_gpioconf pxa27x_i2c_gpioconf[] = { 940 { 117, GPIO_CLR | GPIO_ALT_FN_1_IN }, /* SCL */ 941 { 118, GPIO_CLR | GPIO_ALT_FN_1_IN }, /* SDA */ 942 { -1 } 943 }; 944 945 struct pxa2x0_gpioconf pxa27x_i2s_gpioconf[] = { 946 { 28, GPIO_CLR | GPIO_ALT_FN_1_OUT }, /* I2S_BITCLK */ 947 { 29, GPIO_CLR | GPIO_ALT_FN_2_IN }, /* I2S_SDATA_IN */ 948 { 30, GPIO_CLR | GPIO_ALT_FN_1_OUT }, /* I2S_SDATA_OUT */ 949 { 31, GPIO_CLR | GPIO_ALT_FN_1_OUT }, /* I2S_SYNC */ 950 { 113, GPIO_CLR | GPIO_ALT_FN_1_OUT }, /* I2S_SYSCLK */ 951 { -1 } 952 }; 953 954 struct pxa2x0_gpioconf pxa27x_ohci_gpioconf[] = { 955 #if 0 /* We can select and/or. */ 956 { 88, GPIO_CLR | GPIO_ALT_FN_1_IN }, /* USBHPWR1 */ 957 { 89, GPIO_CLR | GPIO_ALT_FN_2_OUT }, /* USBHPEN1 */ 958 { 119, GPIO_CLR | GPIO_ALT_FN_1_IN }, /* USBHPWR2 */ 959 { 120, GPIO_CLR | GPIO_ALT_FN_2_OUT }, /* USBHPEN2 */ 960 #endif 961 { -1 } 962 }; 963 964 struct pxa2x0_gpioconf pxa27x_pcic_gpioconf[] = { 965 { 48, GPIO_CLR | GPIO_ALT_FN_2_OUT }, /* nPOE */ 966 { 49, GPIO_CLR | GPIO_ALT_FN_2_OUT }, /* nPWE */ 967 { 50, GPIO_CLR | GPIO_ALT_FN_2_OUT }, /* nPIOR */ 968 { 51, GPIO_CLR | GPIO_ALT_FN_2_OUT }, /* nPIOW */ 969 { 55, GPIO_CLR | GPIO_ALT_FN_2_OUT }, /* nPREG */ 970 { 56, GPIO_CLR | GPIO_ALT_FN_1_IN }, /* nPWAIT */ 971 { 57, GPIO_CLR | GPIO_ALT_FN_1_IN }, /* nIOIS16 */ 972 973 #if 0 /* We can select and/or. */ 974 { 85, GPIO_CLR | GPIO_ALT_FN_1_OUT }, /* nPCE1 */ 975 { 86, GPIO_CLR | GPIO_ALT_FN_1_OUT }, /* nPCE1 */ 976 { 102, GPIO_CLR | GPIO_ALT_FN_1_OUT }, /* nPCE1 */ 977 978 { 54, GPIO_CLR | GPIO_ALT_FN_2_OUT }, /* nPCE2 */ 979 { 78, GPIO_CLR | GPIO_ALT_FN_1_OUT }, /* nPCE2 */ 980 { 105, GPIO_CLR | GPIO_ALT_FN_1_OUT }, /* nPCE2 */ 981 982 { 79, GPIO_CLR | GPIO_ALT_FN_1_OUT }, /* pSKTSEL */ 983 { 104, GPIO_CLR | GPIO_ALT_FN_1_OUT }, /* pSKTSEL */ 984 #endif 985 986 { -1 } 987 }; 988 989 struct pxa2x0_gpioconf pxa27x_pxaacu_gpioconf[] = { 990 { 28, GPIO_CLR | GPIO_ALT_FN_1_IN }, /* BITCLK */ 991 { 30, GPIO_CLR | GPIO_ALT_FN_2_OUT }, /* SDATA_OUT */ 992 993 #if 0 /* We can select and/or. */ 994 { 31, GPIO_CLR | GPIO_ALT_FN_2_OUT }, /* SYNC */ 995 { 94, GPIO_CLR | GPIO_ALT_FN_1_OUT }, /* SYNC */ 996 997 { 29, GPIO_CLR | GPIO_ALT_FN_1_IN }, /* SDATA_IN0 */ 998 { 116, GPIO_CLR | GPIO_ALT_FN_2_IN }, /* SDATA_IN0 */ 999 1000 { 32, GPIO_CLR | GPIO_ALT_FN_1_IN }, /* SDATA_IN1 */ 1001 { 99, GPIO_CLR | GPIO_ALT_FN_2_IN }, /* SDATA_IN1 */ 1002 1003 { 95, GPIO_CLR | GPIO_ALT_FN_1_OUT }, /* RESET_n */ 1004 { 113, GPIO_CLR | GPIO_ALT_FN_2_OUT }, /* RESET_n */ 1005 #endif 1006 1007 { -1 } 1008 }; 1009 1010 struct pxa2x0_gpioconf pxa27x_pxamci_gpioconf[] = { 1011 { 32, GPIO_CLR | GPIO_ALT_FN_2_OUT }, /* MMCLK */ 1012 { 92, GPIO_CLR | GPIO_ALT_FN_1_IN }, /* MMDAT<0> */ 1013 { 109, GPIO_CLR | GPIO_ALT_FN_1_IN }, /* MMDAT<1> */ 1014 { 110, GPIO_CLR | GPIO_ALT_FN_1_IN }, /* MMDAT<2>/MMCCS<0> */ 1015 { 111, GPIO_CLR | GPIO_ALT_FN_1_IN }, /* MMDAT<3>/MMCCS<1> */ 1016 { 112, GPIO_CLR | GPIO_ALT_FN_1_IN }, /* MMCMD */ 1017 1018 { -1 } 1019 }; 1020 #endif 1021 1022 void 1023 pxa2x0_gpio_config(struct pxa2x0_gpioconf **conflist) 1024 { 1025 int i, j; 1026 1027 for (i = 0; conflist[i] != NULL; i++) 1028 for (j = 0; conflist[i][j].pin != -1; j++) 1029 pxa2x0_gpio_set_function(conflist[i][j].pin, 1030 conflist[i][j].value); 1031 } 1032
Indexes created Sat Sep 20 22:09:52 GMT 2025