1 /* $NetBSD: ti_gpio.c,v 1.15 2024/04/01 15:52:08 jakllsch Exp $ */ 2 3 /*- 4 * Copyright (c) 2019 Jared McNeill <jmcneill (at) invisible.ca> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 22 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __KERNEL_RCSID(0, "$NetBSD: ti_gpio.c,v 1.15 2024/04/01 15:52:08 jakllsch Exp $"); 31 32 #include <sys/param.h> 33 #include <sys/bitops.h> 34 #include <sys/bus.h> 35 #include <sys/device.h> 36 #include <sys/gpio.h> 37 #include <sys/intr.h> 38 #include <sys/kmem.h> 39 #include <sys/lwp.h> 40 #include <sys/mutex.h> 41 #include <sys/systm.h> 42 43 #include <dev/fdt/fdtvar.h> 44 #include <dev/gpio/gpiovar.h> 45 46 #include <arm/ti/ti_prcm.h> 47 48 #define TI_GPIO_NPINS 32 49 50 enum ti_gpio_type { 51 TI_GPIO_OMAP3, 52 TI_GPIO_OMAP4, 53 TI_NGPIO 54 }; 55 56 enum { 57 GPIO_IRQSTATUS1, 58 GPIO_IRQENABLE1, /* OMAP3 */ 59 GPIO_IRQENABLE1_SET, /* OMAP4 */ 60 GPIO_IRQENABLE1_CLR, /* OMAP4 */ 61 GPIO_OE, 62 GPIO_DATAIN, 63 GPIO_DATAOUT, 64 GPIO_LEVELDETECT0, 65 GPIO_LEVELDETECT1, 66 GPIO_RISINGDETECT, 67 GPIO_FALLINGDETECT, 68 GPIO_CLEARDATAOUT, 69 GPIO_SETDATAOUT, 70 GPIO_NREG 71 }; 72 73 static const u_int ti_gpio_regmap[TI_NGPIO][GPIO_NREG] = { 74 [TI_GPIO_OMAP3] = { 75 [GPIO_IRQSTATUS1] = 0x18, 76 [GPIO_IRQENABLE1] = 0x1c, 77 [GPIO_OE] = 0x34, 78 [GPIO_DATAIN] = 0x38, 79 [GPIO_DATAOUT] = 0x3c, 80 [GPIO_LEVELDETECT0] = 0x40, 81 [GPIO_LEVELDETECT1] = 0x44, 82 [GPIO_RISINGDETECT] = 0x48, 83 [GPIO_FALLINGDETECT] = 0x4c, 84 [GPIO_CLEARDATAOUT] = 0x90, 85 [GPIO_SETDATAOUT] = 0x94, 86 }, 87 [TI_GPIO_OMAP4] = { 88 [GPIO_IRQSTATUS1] = 0x2c, 89 [GPIO_IRQENABLE1_SET] = 0x34, 90 [GPIO_IRQENABLE1_CLR] = 0x38, 91 [GPIO_OE] = 0x134, 92 [GPIO_DATAIN] = 0x138, 93 [GPIO_DATAOUT] = 0x13c, 94 [GPIO_LEVELDETECT0] = 0x140, 95 [GPIO_LEVELDETECT1] = 0x144, 96 [GPIO_RISINGDETECT] = 0x148, 97 [GPIO_FALLINGDETECT] = 0x14c, 98 [GPIO_CLEARDATAOUT] = 0x190, 99 [GPIO_SETDATAOUT] = 0x194, 100 }, 101 }; 102 103 static const struct device_compatible_entry compat_data[] = { 104 { .compat = "ti,omap3-gpio", .value = TI_GPIO_OMAP3 }, 105 { .compat = "ti,omap4-gpio", .value = TI_GPIO_OMAP4 }, 106 DEVICE_COMPAT_EOL 107 }; 108 109 struct ti_gpio_intr { 110 u_int intr_pin; 111 int (*intr_func)(void *); 112 void *intr_arg; 113 bool intr_mpsafe; 114 }; 115 116 struct ti_gpio_softc { 117 device_t sc_dev; 118 bus_space_tag_t sc_bst; 119 bus_space_handle_t sc_bsh; 120 kmutex_t sc_lock; 121 enum ti_gpio_type sc_type; 122 const char *sc_modname; 123 void *sc_ih; 124 125 struct gpio_chipset_tag sc_gp; 126 gpio_pin_t sc_pins[TI_GPIO_NPINS]; 127 bool sc_pinout[TI_GPIO_NPINS]; 128 struct ti_gpio_intr sc_intr[TI_GPIO_NPINS]; 129 device_t sc_gpiodev; 130 }; 131 132 struct ti_gpio_pin { 133 struct ti_gpio_softc *pin_sc; 134 u_int pin_nr; 135 int pin_flags; 136 bool pin_actlo; 137 }; 138 139 #define RD4(sc, reg) \ 140 bus_space_read_4((sc)->sc_bst, (sc)->sc_bsh, ti_gpio_regmap[(sc)->sc_type][(reg)]) 141 #define WR4(sc, reg, val) \ 142 bus_space_write_4((sc)->sc_bst, (sc)->sc_bsh, ti_gpio_regmap[(sc)->sc_type][(reg)], (val)) 143 144 static int ti_gpio_match(device_t, cfdata_t, void *); 145 static void ti_gpio_attach(device_t, device_t, void *); 146 147 CFATTACH_DECL_NEW(ti_gpio, sizeof(struct ti_gpio_softc), 148 ti_gpio_match, ti_gpio_attach, NULL, NULL); 149 150 static int 151 ti_gpio_ctl(struct ti_gpio_softc *sc, u_int pin, int flags) 152 { 153 uint32_t oe; 154 155 KASSERT(mutex_owned(&sc->sc_lock)); 156 157 oe = RD4(sc, GPIO_OE); 158 if (flags & GPIO_PIN_INPUT) 159 oe |= __BIT(pin); 160 else if (flags & GPIO_PIN_OUTPUT) 161 oe &= ~__BIT(pin); 162 WR4(sc, GPIO_OE, oe); 163 164 sc->sc_pinout[pin] = (flags & GPIO_PIN_OUTPUT) != 0; 165 166 return 0; 167 } 168 169 static void * 170 ti_gpio_acquire(device_t dev, const void *data, size_t len, int flags) 171 { 172 struct ti_gpio_softc * const sc = device_private(dev); 173 struct ti_gpio_pin *gpin; 174 const u_int *gpio = data; 175 int error; 176 177 if (len != 12) 178 return NULL; 179 180 const uint8_t pin = be32toh(gpio[1]) & 0xff; 181 const bool actlo = be32toh(gpio[2]) & 1; 182 183 if (pin >= __arraycount(sc->sc_pins)) 184 return NULL; 185 186 mutex_enter(&sc->sc_lock); 187 error = ti_gpio_ctl(sc, pin, flags); 188 mutex_exit(&sc->sc_lock); 189 190 if (error != 0) 191 return NULL; 192 193 gpin = kmem_zalloc(sizeof(*gpin), KM_SLEEP); 194 gpin->pin_sc = sc; 195 gpin->pin_nr = pin; 196 gpin->pin_flags = flags; 197 gpin->pin_actlo = actlo; 198 199 return gpin; 200 } 201 202 static void 203 ti_gpio_release(device_t dev, void *priv) 204 { 205 struct ti_gpio_softc * const sc = device_private(dev); 206 struct ti_gpio_pin *pin = priv; 207 208 mutex_enter(&sc->sc_lock); 209 ti_gpio_ctl(pin->pin_sc, pin->pin_nr, GPIO_PIN_INPUT); 210 mutex_exit(&sc->sc_lock); 211 212 kmem_free(pin, sizeof(*pin)); 213 } 214 215 static int 216 ti_gpio_read(device_t dev, void *priv, bool raw) 217 { 218 struct ti_gpio_softc * const sc = device_private(dev); 219 struct ti_gpio_pin *pin = priv; 220 uint32_t data; 221 int val; 222 223 KASSERT(sc == pin->pin_sc); 224 225 const uint32_t data_mask = __BIT(pin->pin_nr); 226 227 /* No lock required for reads */ 228 if (sc->sc_pinout[pin->pin_nr]) 229 data = RD4(sc, GPIO_DATAOUT); 230 else 231 data = RD4(sc, GPIO_DATAIN); 232 val = __SHIFTOUT(data, data_mask); 233 if (!raw && pin->pin_actlo) 234 val = !val; 235 236 return val; 237 } 238 239 static void 240 ti_gpio_write(device_t dev, void *priv, int val, bool raw) 241 { 242 struct ti_gpio_softc * const sc = device_private(dev); 243 struct ti_gpio_pin *pin = priv; 244 245 KASSERT(sc == pin->pin_sc); 246 247 const uint32_t data_mask = __BIT(pin->pin_nr); 248 249 if (!raw && pin->pin_actlo) 250 val = !val; 251 252 const u_int data_reg = val ? GPIO_SETDATAOUT : GPIO_CLEARDATAOUT; 253 254 WR4(sc, data_reg, data_mask); 255 } 256 257 static struct fdtbus_gpio_controller_func ti_gpio_funcs = { 258 .acquire = ti_gpio_acquire, 259 .release = ti_gpio_release, 260 .read = ti_gpio_read, 261 .write = ti_gpio_write, 262 }; 263 264 static void 265 ti_gpio_intr_disable(struct ti_gpio_softc * const sc, struct ti_gpio_intr * const intr) 266 { 267 const u_int pin = intr->intr_pin; 268 const uint32_t pin_mask = __BIT(pin); 269 uint32_t val; 270 271 /* Disable interrupts */ 272 if (sc->sc_type == TI_GPIO_OMAP3) { 273 val = RD4(sc, GPIO_IRQENABLE1); 274 WR4(sc, GPIO_IRQENABLE1, val & ~pin_mask); 275 } else { 276 WR4(sc, GPIO_IRQENABLE1_CLR, pin_mask); 277 } 278 279 intr->intr_func = NULL; 280 intr->intr_arg = NULL; 281 intr->intr_mpsafe = false; 282 } 283 284 static void * 285 ti_gpio_intr_establish(device_t dev, u_int *specifier, int ipl, int flags, 286 int (*func)(void *), void *arg, const char *xname) 287 { 288 struct ti_gpio_softc * const sc = device_private(dev); 289 uint32_t val; 290 291 /* 1st cell is the pin */ 292 /* 2nd cell is flags */ 293 const u_int pin = be32toh(specifier[0]); 294 const u_int type = be32toh(specifier[2]) & 0xf; 295 296 if (ipl != IPL_VM || pin >= __arraycount(sc->sc_pins)) 297 return NULL; 298 299 /* 300 * Enabling both high and low level triggers will cause the GPIO 301 * controller to always assert the interrupt. 302 */ 303 if ((type & (FDT_INTR_TYPE_LOW_LEVEL|FDT_INTR_TYPE_HIGH_LEVEL)) == 304 (FDT_INTR_TYPE_LOW_LEVEL|FDT_INTR_TYPE_HIGH_LEVEL)) 305 return NULL; 306 307 if (sc->sc_intr[pin].intr_func != NULL) 308 return NULL; 309 310 /* Set pin as input */ 311 if (ti_gpio_ctl(sc, pin, GPIO_PIN_INPUT) != 0) 312 return NULL; 313 314 sc->sc_intr[pin].intr_pin = pin; 315 sc->sc_intr[pin].intr_func = func; 316 sc->sc_intr[pin].intr_arg = arg; 317 sc->sc_intr[pin].intr_mpsafe = (flags & FDT_INTR_MPSAFE) != 0; 318 319 const uint32_t pin_mask = __BIT(pin); 320 321 /* Configure triggers */ 322 val = RD4(sc, GPIO_LEVELDETECT0); 323 if ((type & FDT_INTR_TYPE_LOW_LEVEL) != 0) 324 val |= pin_mask; 325 else 326 val &= ~pin_mask; 327 WR4(sc, GPIO_LEVELDETECT0, val); 328 329 val = RD4(sc, GPIO_LEVELDETECT1); 330 if ((type & FDT_INTR_TYPE_HIGH_LEVEL) != 0) 331 val |= pin_mask; 332 else 333 val &= ~pin_mask; 334 WR4(sc, GPIO_LEVELDETECT1, val); 335 336 val = RD4(sc, GPIO_RISINGDETECT); 337 if ((type & FDT_INTR_TYPE_POS_EDGE) != 0) 338 val |= pin_mask; 339 else 340 val &= ~pin_mask; 341 WR4(sc, GPIO_RISINGDETECT, val); 342 343 val = RD4(sc, GPIO_FALLINGDETECT); 344 if ((type & FDT_INTR_TYPE_NEG_EDGE) != 0) 345 val |= pin_mask; 346 else 347 val &= ~pin_mask; 348 WR4(sc, GPIO_FALLINGDETECT, val); 349 350 /* Enable interrupts */ 351 if (sc->sc_type == TI_GPIO_OMAP3) { 352 val = RD4(sc, GPIO_IRQENABLE1); 353 WR4(sc, GPIO_IRQENABLE1, val | pin_mask); 354 } else { 355 WR4(sc, GPIO_IRQENABLE1_SET, pin_mask); 356 } 357 358 return &sc->sc_intr[pin]; 359 } 360 361 static void 362 ti_gpio_intr_disestablish(device_t dev, void *ih) 363 { 364 struct ti_gpio_softc * const sc = device_private(dev); 365 struct ti_gpio_intr * const intr = ih; 366 367 ti_gpio_intr_disable(sc, intr); 368 } 369 370 static bool 371 ti_gpio_intrstr(device_t dev, u_int *specifier, char *buf, size_t buflen) 372 { 373 struct ti_gpio_softc * const sc = device_private(dev); 374 375 /* 1st cell is the pin */ 376 /* 2nd cell is flags */ 377 const u_int pin = be32toh(specifier[0]); 378 379 if (pin >= __arraycount(sc->sc_pins)) 380 return false; 381 382 snprintf(buf, buflen, "%s pin %d", sc->sc_modname, pin); 383 return true; 384 } 385 386 static struct fdtbus_interrupt_controller_func ti_gpio_intrfuncs = { 387 .establish = ti_gpio_intr_establish, 388 .disestablish = ti_gpio_intr_disestablish, 389 .intrstr = ti_gpio_intrstr, 390 }; 391 392 static int 393 ti_gpio_pin_read(void *priv, int pin) 394 { 395 struct ti_gpio_softc * const sc = priv; 396 uint32_t data; 397 int val; 398 399 KASSERT(pin < __arraycount(sc->sc_pins)); 400 401 const uint32_t data_mask = __BIT(pin); 402 403 data = RD4(sc, GPIO_DATAIN); 404 val = __SHIFTOUT(data, data_mask); 405 406 return val; 407 } 408 409 static void 410 ti_gpio_pin_write(void *priv, int pin, int val) 411 { 412 struct ti_gpio_softc * const sc = priv; 413 414 KASSERT(pin < __arraycount(sc->sc_pins)); 415 416 const u_int data_reg = val ? GPIO_SETDATAOUT : GPIO_CLEARDATAOUT; 417 const uint32_t data_mask = __BIT(pin); 418 419 WR4(sc, data_reg, data_mask); 420 } 421 422 static void 423 ti_gpio_pin_ctl(void *priv, int pin, int flags) 424 { 425 struct ti_gpio_softc * const sc = priv; 426 427 KASSERT(pin < __arraycount(sc->sc_pins)); 428 429 mutex_enter(&sc->sc_lock); 430 ti_gpio_ctl(sc, pin, flags); 431 mutex_exit(&sc->sc_lock); 432 } 433 434 static void * 435 ti_gpio_gp_intr_establish(void *vsc, int pin, int ipl, int irqmode, 436 int (*func)(void *), void *arg) 437 { 438 struct ti_gpio_softc * const sc = vsc; 439 uint32_t val; 440 441 if (ipl != IPL_VM || pin < 0 || pin >= __arraycount(sc->sc_pins)) 442 return NULL; 443 444 if (sc->sc_intr[pin].intr_func != NULL) 445 return NULL; 446 447 /* 448 * Enabling both high and low level triggers will cause the GPIO 449 * controller to always assert the interrupt. 450 */ 451 if ((irqmode & (GPIO_INTR_LOW_LEVEL|GPIO_INTR_HIGH_LEVEL)) == 452 (GPIO_INTR_LOW_LEVEL|GPIO_INTR_HIGH_LEVEL)) 453 return NULL; 454 455 /* Set pin as input */ 456 mutex_enter(&sc->sc_lock); 457 if (ti_gpio_ctl(sc, pin, GPIO_PIN_INPUT) != 0) { 458 mutex_exit(&sc->sc_lock); 459 return NULL; 460 } 461 462 sc->sc_intr[pin].intr_pin = pin; 463 sc->sc_intr[pin].intr_func = func; 464 sc->sc_intr[pin].intr_arg = arg; 465 sc->sc_intr[pin].intr_mpsafe = (irqmode & GPIO_INTR_MPSAFE) != 0; 466 467 const uint32_t pin_mask = __BIT(pin); 468 469 /* Configure triggers */ 470 val = RD4(sc, GPIO_LEVELDETECT0); 471 if ((irqmode & GPIO_INTR_LOW_LEVEL) != 0) 472 val |= pin_mask; 473 else 474 val &= ~pin_mask; 475 WR4(sc, GPIO_LEVELDETECT0, val); 476 477 val = RD4(sc, GPIO_LEVELDETECT1); 478 if ((irqmode & GPIO_INTR_HIGH_LEVEL) != 0) 479 val |= pin_mask; 480 else 481 val &= ~pin_mask; 482 WR4(sc, GPIO_LEVELDETECT1, val); 483 484 val = RD4(sc, GPIO_RISINGDETECT); 485 if ((irqmode & GPIO_INTR_POS_EDGE) != 0 || 486 (irqmode & GPIO_INTR_DOUBLE_EDGE) != 0) 487 val |= pin_mask; 488 else 489 val &= ~pin_mask; 490 WR4(sc, GPIO_RISINGDETECT, val); 491 492 val = RD4(sc, GPIO_FALLINGDETECT); 493 if ((irqmode & GPIO_INTR_NEG_EDGE) != 0 || 494 (irqmode & GPIO_INTR_DOUBLE_EDGE) != 0) 495 val |= pin_mask; 496 else 497 val &= ~pin_mask; 498 WR4(sc, GPIO_FALLINGDETECT, val); 499 500 /* Enable interrupts */ 501 if (sc->sc_type == TI_GPIO_OMAP3) { 502 val = RD4(sc, GPIO_IRQENABLE1); 503 WR4(sc, GPIO_IRQENABLE1, val | pin_mask); 504 } else { 505 WR4(sc, GPIO_IRQENABLE1_SET, pin_mask); 506 } 507 508 mutex_exit(&sc->sc_lock); 509 510 return &sc->sc_intr[pin]; 511 } 512 513 static void 514 ti_gpio_gp_intr_disestablish(void *vsc, void *ih) 515 { 516 struct ti_gpio_softc * const sc = vsc; 517 struct ti_gpio_intr * const intr = ih; 518 519 ti_gpio_intr_disable(sc, intr); 520 } 521 522 static bool 523 ti_gpio_gp_intrstr(void *vsc, int pin, int irqmode, char *buf, size_t buflen) 524 { 525 struct ti_gpio_softc * const sc = vsc; 526 527 if (pin < 0 || pin >= TI_GPIO_NPINS) 528 return false; 529 530 snprintf(buf, buflen, "%s pin %d", sc->sc_modname, pin); 531 return true; 532 } 533 534 static void 535 ti_gpio_attach_ports(struct ti_gpio_softc *sc) 536 { 537 struct gpio_chipset_tag *gp = &sc->sc_gp; 538 struct gpiobus_attach_args gba; 539 u_int pin; 540 541 gp->gp_cookie = sc; 542 gp->gp_pin_read = ti_gpio_pin_read; 543 gp->gp_pin_write = ti_gpio_pin_write; 544 gp->gp_pin_ctl = ti_gpio_pin_ctl; 545 gp->gp_intr_establish = ti_gpio_gp_intr_establish; 546 gp->gp_intr_disestablish = ti_gpio_gp_intr_disestablish; 547 gp->gp_intr_str = ti_gpio_gp_intrstr; 548 549 for (pin = 0; pin < __arraycount(sc->sc_pins); pin++) { 550 sc->sc_pins[pin].pin_num = pin; 551 sc->sc_pins[pin].pin_caps = GPIO_PIN_INPUT | GPIO_PIN_OUTPUT; 552 sc->sc_pins[pin].pin_intrcaps = 553 GPIO_INTR_POS_EDGE | GPIO_INTR_NEG_EDGE | 554 GPIO_INTR_DOUBLE_EDGE | GPIO_INTR_HIGH_LEVEL | 555 GPIO_INTR_LOW_LEVEL | GPIO_INTR_MPSAFE; 556 sc->sc_pins[pin].pin_state = ti_gpio_pin_read(sc, pin); 557 } 558 559 memset(&gba, 0, sizeof(gba)); 560 gba.gba_gc = gp; 561 gba.gba_pins = sc->sc_pins; 562 gba.gba_npins = __arraycount(sc->sc_pins); 563 sc->sc_gpiodev = config_found(sc->sc_dev, &gba, NULL, CFARGS_NONE); 564 } 565 566 static int 567 ti_gpio_intr(void *priv) 568 { 569 struct ti_gpio_softc * const sc = priv; 570 uint32_t status; 571 u_int bit; 572 int rv = 0; 573 574 status = RD4(sc, GPIO_IRQSTATUS1); 575 WR4(sc, GPIO_IRQSTATUS1, status); 576 577 while ((bit = ffs32(status)) != 0) { 578 const u_int pin = bit - 1; 579 const uint32_t pin_mask = __BIT(pin); 580 struct ti_gpio_intr *intr = &sc->sc_intr[pin]; 581 status &= ~pin_mask; 582 if (intr->intr_func == NULL) 583 continue; 584 if (!intr->intr_mpsafe) 585 KERNEL_LOCK(1, curlwp); 586 rv |= intr->intr_func(intr->intr_arg); 587 if (!intr->intr_mpsafe) 588 KERNEL_UNLOCK_ONE(curlwp); 589 } 590 591 return rv; 592 } 593 594 static int 595 ti_gpio_match(device_t parent, cfdata_t cf, void *aux) 596 { 597 struct fdt_attach_args * const faa = aux; 598 599 return of_compatible_match(faa->faa_phandle, compat_data); 600 } 601 602 static void 603 ti_gpio_attach(device_t parent, device_t self, void *aux) 604 { 605 struct ti_gpio_softc * const sc = device_private(self); 606 struct fdt_attach_args * const faa = aux; 607 const int phandle = faa->faa_phandle; 608 char intrstr[128]; 609 bus_addr_t addr; 610 bus_size_t size; 611 612 if (fdtbus_get_reg(phandle, 0, &addr, &size) != 0) { 613 aprint_error(": couldn't get registers\n"); 614 return; 615 } 616 if (!fdtbus_intr_str(phandle, 0, intrstr, sizeof(intrstr))) { 617 aprint_error(": couldn't decode interrupt\n"); 618 return; 619 } 620 if (ti_prcm_enable_hwmod(phandle, 0) != 0) { 621 aprint_error(": couldn't enable module\n"); 622 return; 623 } 624 625 sc->sc_dev = self; 626 sc->sc_bst = faa->faa_bst; 627 if (bus_space_map(sc->sc_bst, addr, size, 0, &sc->sc_bsh) != 0) { 628 aprint_error(": couldn't map registers\n"); 629 return; 630 } 631 sc->sc_type = of_compatible_lookup(phandle, compat_data)->value; 632 mutex_init(&sc->sc_lock, MUTEX_DEFAULT, IPL_VM); 633 634 sc->sc_modname = fdtbus_get_string(phandle, "ti,hwmods"); 635 if (sc->sc_modname == NULL) 636 sc->sc_modname = fdtbus_get_string(OF_parent(phandle), "ti,hwmods"); 637 if (sc->sc_modname == NULL) 638 sc->sc_modname = kmem_asprintf("gpio@%" PRIxBUSADDR, addr); 639 640 aprint_naive("\n"); 641 aprint_normal(": GPIO (%s)\n", sc->sc_modname); 642 643 fdtbus_register_gpio_controller(self, phandle, &ti_gpio_funcs); 644 645 ti_gpio_attach_ports(sc); 646 647 sc->sc_ih = fdtbus_intr_establish_xname(phandle, 0, IPL_VM, 648 FDT_INTR_MPSAFE, ti_gpio_intr, sc, device_xname(self)); 649 if (sc->sc_ih == NULL) { 650 aprint_error_dev(self, "failed to establish interrupt on %s\n", 651 intrstr); 652 return; 653 } 654 aprint_normal_dev(self, "interrupting on %s\n", intrstr); 655 fdtbus_register_interrupt_controller(self, phandle, &ti_gpio_intrfuncs); 656 } 657
Indexes created Wed Sep 24 22:09:59 GMT 2025