1 /*-
2 * Copyright 2016 Stanislav Galabov
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
29
30 #include "opt_platform.h"
31
32 #include <sys/param.h>
33 #include <sys/systm.h>
34 #include <sys/conf.h>
35 #include <sys/bus.h>
36 #include <sys/kernel.h>
37 #include <sys/module.h>
38 #include <sys/lock.h>
39 #include <sys/mutex.h>
40 #include <sys/proc.h>
41 #include <sys/resource.h>
42 #include <sys/gpio.h>
43
44 #include <machine/bus.h>
45 #include <machine/intr.h>
46
47 #include <mips/mediatek/mtk_soc.h>
48
49 #include <dev/gpio/gpiobusvar.h>
50
51 #include <dev/fdt/fdt_common.h>
52 #include <dev/ofw/ofw_bus.h>
53 #include <dev/ofw/ofw_bus_subr.h>
54
55 #include <gnu/dts/include/dt-bindings/interrupt-controller/irq.h>
56
57 #include "gpio_if.h"
58 #include "pic_if.h"
59
60 #define MTK_GPIO_PINS 32
61
62 enum mtk_gpio_regs {
63 GPIO_PIOINT = 0,
64 GPIO_PIOEDGE,
65 GPIO_PIORENA,
66 GPIO_PIOFENA,
67 GPIO_PIODATA,
68 GPIO_PIODIR,
69 GPIO_PIOPOL,
70 GPIO_PIOSET,
71 GPIO_PIORESET,
72 GPIO_PIOTOG,
73 GPIO_PIOMAX
74 };
75
76 struct mtk_gpio_pin_irqsrc {
77 struct intr_irqsrc isrc;
78 u_int irq;
79 };
80
81 struct mtk_gpio_pin {
82 uint32_t pin_caps;
83 uint32_t pin_flags;
84 enum intr_trigger intr_trigger;
85 enum intr_polarity intr_polarity;
86 char pin_name[GPIOMAXNAME];
87 struct mtk_gpio_pin_irqsrc pin_irqsrc;
88 };
89
90 struct mtk_gpio_softc {
91 device_t dev;
92 device_t busdev;
93 struct resource *res[2];
94 struct mtx mtx;
95 struct mtk_gpio_pin pins[MTK_GPIO_PINS];
96 void *intrhand;
97
98 uint8_t regs[GPIO_PIOMAX];
99 uint32_t num_pins;
100 uint8_t do_remap;
101 };
102
103 #define PIC_INTR_ISRC(sc, irq) (&(sc)->pins[(irq)].pin_irqsrc.isrc)
104
105 static struct resource_spec mtk_gpio_spec[] = {
106 { SYS_RES_MEMORY, 0, RF_ACTIVE },
107 { SYS_RES_IRQ, 0, RF_ACTIVE | RF_SHAREABLE },
108 { -1, 0 }
109 };
110
111 static int mtk_gpio_probe(device_t dev);
112 static int mtk_gpio_attach(device_t dev);
113 static int mtk_gpio_detach(device_t dev);
114 static int mtk_gpio_intr(void *arg);
115
116 #define MTK_GPIO_LOCK(sc) mtx_lock_spin(&(sc)->mtx)
117 #define MTK_GPIO_UNLOCK(sc) mtx_unlock_spin(&(sc)->mtx)
118 #define MTK_GPIO_LOCK_INIT(sc) \
119 mtx_init(&(sc)->mtx, device_get_nameunit((sc)->dev), \
120 "mtk_gpio", MTX_SPIN)
121 #define MTK_GPIO_LOCK_DESTROY(sc) mtx_destroy(&(sc)->mtx)
122
123 #define MTK_WRITE_4(sc, reg, val) \
124 bus_write_4((sc)->res[0], (sc)->regs[(reg)], (val))
125 #define MTK_READ_4(sc, reg) \
126 bus_read_4((sc)->res[0], (sc)->regs[(reg)])
127
128 static struct ofw_compat_data compat_data[] = {
129 { "ralink,rt2880-gpio", 1 },
130 { "ralink,rt3050-gpio", 1 },
131 { "ralink,rt3352-gpio", 1 },
132 { "ralink,rt3883-gpio", 1 },
133 { "ralink,rt5350-gpio", 1 },
134 { "ralink,mt7620a-gpio", 1 },
135 { NULL, 0 }
136 };
137
138 static int
mtk_gpio_probe(device_t dev)139 mtk_gpio_probe(device_t dev)
140 {
141 phandle_t node;
142
143 if (!ofw_bus_status_okay(dev))
144 return (ENXIO);
145
146 if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0)
147 return (ENXIO);
148
149 node = ofw_bus_get_node(dev);
150 if (!OF_hasprop(node, "gpio-controller"))
151 return (ENXIO);
152
153 device_set_desc(dev, "MTK GPIO Controller (v1)");
154
155 return (BUS_PROBE_DEFAULT);
156 }
157
158 static int
mtk_pic_register_isrcs(struct mtk_gpio_softc * sc)159 mtk_pic_register_isrcs(struct mtk_gpio_softc *sc)
160 {
161 int error;
162 uint32_t irq;
163 struct intr_irqsrc *isrc;
164 const char *name;
165
166 name = device_get_nameunit(sc->dev);
167 for (irq = 0; irq < sc->num_pins; irq++) {
168 sc->pins[irq].pin_irqsrc.irq = irq;
169 isrc = PIC_INTR_ISRC(sc, irq);
170 error = intr_isrc_register(isrc, sc->dev, 0, "%s", name);
171 if (error != 0) {
172 /* XXX call intr_isrc_deregister */
173 device_printf(sc->dev, "%s failed", __func__);
174 return (error);
175 }
176 }
177
178 return (0);
179 }
180
181 static int
mtk_gpio_pin_set_direction(struct mtk_gpio_softc * sc,uint32_t pin,uint32_t dir)182 mtk_gpio_pin_set_direction(struct mtk_gpio_softc *sc, uint32_t pin,
183 uint32_t dir)
184 {
185 uint32_t regval, mask = (1u << pin);
186
187 if (!(sc->pins[pin].pin_caps & dir))
188 return (EINVAL);
189
190 regval = MTK_READ_4(sc, GPIO_PIODIR);
191 if (dir == GPIO_PIN_INPUT)
192 regval &= ~mask;
193 else
194 regval |= mask;
195 MTK_WRITE_4(sc, GPIO_PIODIR, regval);
196
197 sc->pins[pin].pin_flags &= ~(GPIO_PIN_INPUT | GPIO_PIN_OUTPUT);
198 sc->pins[pin].pin_flags |= dir;
199
200 return (0);
201 }
202
203 static int
mtk_gpio_pin_set_invert(struct mtk_gpio_softc * sc,uint32_t pin,uint32_t val)204 mtk_gpio_pin_set_invert(struct mtk_gpio_softc *sc, uint32_t pin, uint32_t val)
205 {
206 uint32_t regval, mask = (1u << pin);
207
208 regval = MTK_READ_4(sc, GPIO_PIOPOL);
209 if (val)
210 regval |= mask;
211 else
212 regval &= ~mask;
213 MTK_WRITE_4(sc, GPIO_PIOPOL, regval);
214 sc->pins[pin].pin_flags &= ~(GPIO_PIN_INVIN | GPIO_PIN_INVOUT);
215 sc->pins[pin].pin_flags |= val;
216
217 return (0);
218 }
219
220 static void
mtk_gpio_pin_probe(struct mtk_gpio_softc * sc,uint32_t pin)221 mtk_gpio_pin_probe(struct mtk_gpio_softc *sc, uint32_t pin)
222 {
223 uint32_t mask = (1u << pin);
224 uint32_t val;
225
226 /* Clear cached gpio config */
227 sc->pins[pin].pin_flags = 0;
228
229 val = MTK_READ_4(sc, GPIO_PIORENA) |
230 MTK_READ_4(sc, GPIO_PIOFENA);
231 if (val & mask) {
232 /* Pin is in interrupt mode */
233 sc->pins[pin].intr_trigger = INTR_TRIGGER_EDGE;
234 val = MTK_READ_4(sc, GPIO_PIORENA);
235 if (val & mask)
236 sc->pins[pin].intr_polarity = INTR_POLARITY_HIGH;
237 else
238 sc->pins[pin].intr_polarity = INTR_POLARITY_LOW;
239 }
240
241 val = MTK_READ_4(sc, GPIO_PIODIR);
242 if (val & mask)
243 sc->pins[pin].pin_flags |= GPIO_PIN_OUTPUT;
244 else
245 sc->pins[pin].pin_flags |= GPIO_PIN_INPUT;
246
247 val = MTK_READ_4(sc, GPIO_PIOPOL);
248 if (val & mask) {
249 if (sc->pins[pin].pin_flags & GPIO_PIN_INPUT) {
250 sc->pins[pin].pin_flags |= GPIO_PIN_INVIN;
251 } else {
252 sc->pins[pin].pin_flags |= GPIO_PIN_INVOUT;
253 }
254 }
255 }
256
257 static int
mtk_gpio_attach(device_t dev)258 mtk_gpio_attach(device_t dev)
259 {
260 struct mtk_gpio_softc *sc;
261 phandle_t node;
262 uint32_t i, num_pins;
263
264 sc = device_get_softc(dev);
265 sc->dev = dev;
266
267 if (bus_alloc_resources(dev, mtk_gpio_spec, sc->res)) {
268 device_printf(dev, "could not allocate resources for device\n");
269 return (ENXIO);
270 }
271
272 MTK_GPIO_LOCK_INIT(sc);
273
274 node = ofw_bus_get_node(dev);
275
276 if (OF_hasprop(node, "clocks"))
277 mtk_soc_start_clock(dev);
278 if (OF_hasprop(node, "resets"))
279 mtk_soc_reset_device(dev);
280
281 if (OF_getprop(node, "ralink,register-map", sc->regs,
282 GPIO_PIOMAX) <= 0) {
283 device_printf(dev, "Failed to read register map\n");
284 return (ENXIO);
285 }
286
287 if (OF_hasprop(node, "ralink,num-gpios") && (OF_getencprop(node,
288 "ralink,num-gpios", &num_pins, sizeof(num_pins)) >= 0))
289 sc->num_pins = num_pins;
290 else
291 sc->num_pins = MTK_GPIO_PINS;
292
293 for (i = 0; i < sc->num_pins; i++) {
294 sc->pins[i].pin_caps |= GPIO_PIN_INPUT | GPIO_PIN_OUTPUT |
295 GPIO_PIN_INVIN | GPIO_PIN_INVOUT;
296 sc->pins[i].intr_polarity = INTR_POLARITY_HIGH;
297 sc->pins[i].intr_trigger = INTR_TRIGGER_EDGE;
298
299 snprintf(sc->pins[i].pin_name, GPIOMAXNAME - 1, "gpio%c%d",
300 device_get_unit(dev) + 'a', i);
301 sc->pins[i].pin_name[GPIOMAXNAME - 1] = '\0';
302
303 mtk_gpio_pin_probe(sc, i);
304 }
305
306 if (mtk_pic_register_isrcs(sc) != 0) {
307 device_printf(dev, "could not register PIC ISRCs\n");
308 goto fail;
309 }
310
311 if (intr_pic_register(dev, OF_xref_from_node(node)) == NULL) {
312 device_printf(dev, "could not register PIC\n");
313 goto fail;
314 }
315
316 if (bus_setup_intr(dev, sc->res[1], INTR_TYPE_MISC | INTR_MPSAFE,
317 mtk_gpio_intr, NULL, sc, &sc->intrhand) != 0)
318 goto fail_pic;
319
320 sc->busdev = gpiobus_attach_bus(dev);
321 if (sc->busdev == NULL)
322 goto fail_pic;
323
324 return (0);
325 fail_pic:
326 intr_pic_deregister(dev, OF_xref_from_node(node));
327 fail:
328 if(sc->intrhand != NULL)
329 bus_teardown_intr(dev, sc->res[1], sc->intrhand);
330 bus_release_resources(dev, mtk_gpio_spec, sc->res);
331 MTK_GPIO_LOCK_DESTROY(sc);
332 return (ENXIO);
333 }
334
335 static int
mtk_gpio_detach(device_t dev)336 mtk_gpio_detach(device_t dev)
337 {
338 struct mtk_gpio_softc *sc = device_get_softc(dev);
339 phandle_t node;
340
341 node = ofw_bus_get_node(dev);
342 intr_pic_deregister(dev, OF_xref_from_node(node));
343 if (sc->intrhand != NULL)
344 bus_teardown_intr(dev, sc->res[1], sc->intrhand);
345 bus_release_resources(dev, mtk_gpio_spec, sc->res);
346 MTK_GPIO_LOCK_DESTROY(sc);
347 return (0);
348 }
349
350 static device_t
mtk_gpio_get_bus(device_t dev)351 mtk_gpio_get_bus(device_t dev)
352 {
353 struct mtk_gpio_softc *sc = device_get_softc(dev);
354
355 return (sc->busdev);
356 }
357
358 static int
mtk_gpio_pin_max(device_t dev,int * maxpin)359 mtk_gpio_pin_max(device_t dev, int *maxpin)
360 {
361 struct mtk_gpio_softc *sc = device_get_softc(dev);
362
363 *maxpin = sc->num_pins - 1;
364
365 return (0);
366 }
367
368 static int
mtk_gpio_pin_getcaps(device_t dev,uint32_t pin,uint32_t * caps)369 mtk_gpio_pin_getcaps(device_t dev, uint32_t pin, uint32_t *caps)
370 {
371 struct mtk_gpio_softc *sc = device_get_softc(dev);
372
373 if (pin >= sc->num_pins)
374 return (EINVAL);
375
376 MTK_GPIO_LOCK(sc);
377 *caps = sc->pins[pin].pin_caps;
378 MTK_GPIO_UNLOCK(sc);
379
380 return (0);
381 }
382
383 static int
mtk_gpio_pin_getflags(device_t dev,uint32_t pin,uint32_t * flags)384 mtk_gpio_pin_getflags(device_t dev, uint32_t pin, uint32_t *flags)
385 {
386 struct mtk_gpio_softc *sc = device_get_softc(dev);
387
388 if (pin >= sc->num_pins)
389 return (EINVAL);
390
391 MTK_GPIO_LOCK(sc);
392 *flags = sc->pins[pin].pin_flags;
393 MTK_GPIO_UNLOCK(sc);
394
395 return (0);
396 }
397
398 static int
mtk_gpio_pin_getname(device_t dev,uint32_t pin,char * name)399 mtk_gpio_pin_getname(device_t dev, uint32_t pin, char *name)
400 {
401 struct mtk_gpio_softc *sc = device_get_softc(dev);
402
403 if (pin >= sc->num_pins)
404 return (EINVAL);
405
406 strncpy(name, sc->pins[pin].pin_name, GPIOMAXNAME - 1);
407 name[GPIOMAXNAME - 1] = '\0';
408
409 return (0);
410 }
411
412 static int
mtk_gpio_pin_setflags(device_t dev,uint32_t pin,uint32_t flags)413 mtk_gpio_pin_setflags(device_t dev, uint32_t pin, uint32_t flags)
414 {
415 struct mtk_gpio_softc *sc;
416 int retval;
417
418 sc = device_get_softc(dev);
419
420 if (pin >= sc->num_pins)
421 return (EINVAL);
422
423 MTK_GPIO_LOCK(sc);
424 retval = mtk_gpio_pin_set_direction(sc, pin,
425 flags & (GPIO_PIN_INPUT | GPIO_PIN_OUTPUT));
426 if (retval == 0)
427 retval = mtk_gpio_pin_set_invert(sc, pin,
428 flags & (GPIO_PIN_INVIN | GPIO_PIN_INVOUT));
429 MTK_GPIO_UNLOCK(sc);
430
431 return (retval);
432 }
433
434 static int
mtk_gpio_pin_set(device_t dev,uint32_t pin,unsigned int value)435 mtk_gpio_pin_set(device_t dev, uint32_t pin, unsigned int value)
436 {
437 struct mtk_gpio_softc *sc;
438 int ret;
439
440 sc = device_get_softc(dev);
441 ret = 0;
442
443 if (pin >= sc->num_pins)
444 return (EINVAL);
445
446 MTK_GPIO_LOCK(sc);
447 if (value)
448 MTK_WRITE_4(sc, GPIO_PIOSET, (1u << pin));
449 else
450 MTK_WRITE_4(sc, GPIO_PIORESET, (1u << pin));
451 MTK_GPIO_UNLOCK(sc);
452
453 return (ret);
454 }
455
456 static int
mtk_gpio_pin_get(device_t dev,uint32_t pin,unsigned int * val)457 mtk_gpio_pin_get(device_t dev, uint32_t pin, unsigned int *val)
458 {
459 struct mtk_gpio_softc *sc;
460 uint32_t data;
461 int ret;
462
463 sc = device_get_softc(dev);
464 ret = 0;
465
466 if (pin >= sc->num_pins)
467 return (EINVAL);
468
469 MTK_GPIO_LOCK(sc);
470 data = MTK_READ_4(sc, GPIO_PIODATA);
471 *val = (data & (1u << pin)) ? 1 : 0;
472 MTK_GPIO_UNLOCK(sc);
473
474 return (ret);
475 }
476
477 static int
mtk_gpio_pin_toggle(device_t dev,uint32_t pin)478 mtk_gpio_pin_toggle(device_t dev, uint32_t pin)
479 {
480 struct mtk_gpio_softc *sc;
481 int ret;
482
483 sc = device_get_softc(dev);
484 ret = 0;
485
486 if (pin >= sc->num_pins)
487 return (EINVAL);
488
489 MTK_GPIO_LOCK(sc);
490 if (!(sc->pins[pin].pin_flags & GPIO_PIN_OUTPUT)) {
491 ret = EINVAL;
492 goto out;
493 }
494 MTK_WRITE_4(sc, GPIO_PIOTOG, (1u << pin));
495
496 out:
497 MTK_GPIO_UNLOCK(sc);
498
499 return (ret);
500 }
501
502 static int
mtk_gpio_pic_map_intr(device_t dev,struct intr_map_data * data,struct intr_irqsrc ** isrcp)503 mtk_gpio_pic_map_intr(device_t dev, struct intr_map_data *data,
504 struct intr_irqsrc **isrcp)
505 {
506 struct intr_map_data_fdt *daf;
507 struct mtk_gpio_softc *sc;
508
509 if (data->type != INTR_MAP_DATA_FDT)
510 return (ENOTSUP);
511
512 sc = device_get_softc(dev);
513 daf = (struct intr_map_data_fdt *)data;
514
515 if (daf->ncells != 1 || daf->cells[0] >= sc->num_pins)
516 return (EINVAL);
517
518 *isrcp = PIC_INTR_ISRC(sc, daf->cells[0]);
519 return (0);
520 }
521
522 static void
mtk_gpio_pic_enable_intr(device_t dev,struct intr_irqsrc * isrc)523 mtk_gpio_pic_enable_intr(device_t dev, struct intr_irqsrc *isrc)
524 {
525 struct mtk_gpio_softc *sc;
526 struct mtk_gpio_pin_irqsrc *pisrc;
527 uint32_t pin, mask, val;
528
529 sc = device_get_softc(dev);
530
531 pisrc = (struct mtk_gpio_pin_irqsrc *)isrc;
532 pin = pisrc->irq;
533 mask = 1u << pin;
534
535 MTK_GPIO_LOCK(sc);
536
537 if (sc->pins[pin].intr_polarity == INTR_POLARITY_LOW) {
538 val = MTK_READ_4(sc, GPIO_PIORENA) & ~mask;
539 MTK_WRITE_4(sc, GPIO_PIORENA, val);
540 val = MTK_READ_4(sc, GPIO_PIOFENA) | mask;
541 MTK_WRITE_4(sc, GPIO_PIOFENA, val);
542 } else {
543 val = MTK_READ_4(sc, GPIO_PIOFENA) & ~mask;
544 MTK_WRITE_4(sc, GPIO_PIOFENA, val);
545 val = MTK_READ_4(sc, GPIO_PIORENA) | mask;
546 MTK_WRITE_4(sc, GPIO_PIORENA, val);
547 }
548
549 MTK_GPIO_UNLOCK(sc);
550 }
551
552 static void
mtk_gpio_pic_disable_intr(device_t dev,struct intr_irqsrc * isrc)553 mtk_gpio_pic_disable_intr(device_t dev, struct intr_irqsrc *isrc)
554 {
555 struct mtk_gpio_softc *sc;
556 struct mtk_gpio_pin_irqsrc *pisrc;
557 uint32_t pin, mask, val;
558
559 sc = device_get_softc(dev);
560
561 pisrc = (struct mtk_gpio_pin_irqsrc *)isrc;
562 pin = pisrc->irq;
563 mask = 1u << pin;
564
565 MTK_GPIO_LOCK(sc);
566
567 val = MTK_READ_4(sc, GPIO_PIORENA) & ~mask;
568 MTK_WRITE_4(sc, GPIO_PIORENA, val);
569 val = MTK_READ_4(sc, GPIO_PIOFENA) & ~mask;
570 MTK_WRITE_4(sc, GPIO_PIOFENA, val);
571
572 MTK_GPIO_UNLOCK(sc);
573 }
574
575 static void
mtk_gpio_pic_pre_ithread(device_t dev,struct intr_irqsrc * isrc)576 mtk_gpio_pic_pre_ithread(device_t dev, struct intr_irqsrc *isrc)
577 {
578
579 mtk_gpio_pic_disable_intr(dev, isrc);
580 }
581
582 static void
mtk_gpio_pic_post_ithread(device_t dev,struct intr_irqsrc * isrc)583 mtk_gpio_pic_post_ithread(device_t dev, struct intr_irqsrc *isrc)
584 {
585
586 mtk_gpio_pic_enable_intr(dev, isrc);
587 }
588
589 static void
mtk_gpio_pic_post_filter(device_t dev,struct intr_irqsrc * isrc)590 mtk_gpio_pic_post_filter(device_t dev, struct intr_irqsrc *isrc)
591 {
592 struct mtk_gpio_softc *sc;
593 struct mtk_gpio_pin_irqsrc *pisrc;
594
595 pisrc = (struct mtk_gpio_pin_irqsrc *)isrc;
596 sc = device_get_softc(dev);
597 MTK_GPIO_LOCK(sc);
598 MTK_WRITE_4(sc, GPIO_PIOINT, 1u << pisrc->irq);
599 MTK_GPIO_UNLOCK(sc);
600 }
601
602 static int
mtk_gpio_intr(void * arg)603 mtk_gpio_intr(void *arg)
604 {
605 struct mtk_gpio_softc *sc;
606 uint32_t i, interrupts;
607
608 sc = arg;
609 interrupts = MTK_READ_4(sc, GPIO_PIOINT);
610
611 for (i = 0; interrupts != 0; i++, interrupts >>= 1) {
612 if ((interrupts & 0x1) == 0)
613 continue;
614 if (intr_isrc_dispatch(PIC_INTR_ISRC(sc, i),
615 curthread->td_intr_frame) != 0) {
616 device_printf(sc->dev, "spurious interrupt %d\n", i);
617 }
618 }
619
620 return (FILTER_HANDLED);
621 }
622
623 static phandle_t
mtk_gpio_get_node(device_t bus,device_t dev)624 mtk_gpio_get_node(device_t bus, device_t dev)
625 {
626
627 /* We only have one child, the GPIO bus, which needs our own node. */
628 return (ofw_bus_get_node(bus));
629 }
630
631 static device_method_t mtk_gpio_methods[] = {
632 /* Device interface */
633 DEVMETHOD(device_probe, mtk_gpio_probe),
634 DEVMETHOD(device_attach, mtk_gpio_attach),
635 DEVMETHOD(device_detach, mtk_gpio_detach),
636
637 /* GPIO protocol */
638 DEVMETHOD(gpio_get_bus, mtk_gpio_get_bus),
639 DEVMETHOD(gpio_pin_max, mtk_gpio_pin_max),
640 DEVMETHOD(gpio_pin_getname, mtk_gpio_pin_getname),
641 DEVMETHOD(gpio_pin_getflags, mtk_gpio_pin_getflags),
642 DEVMETHOD(gpio_pin_getcaps, mtk_gpio_pin_getcaps),
643 DEVMETHOD(gpio_pin_setflags, mtk_gpio_pin_setflags),
644 DEVMETHOD(gpio_pin_get, mtk_gpio_pin_get),
645 DEVMETHOD(gpio_pin_set, mtk_gpio_pin_set),
646 DEVMETHOD(gpio_pin_toggle, mtk_gpio_pin_toggle),
647
648 /* Interrupt controller interface */
649 DEVMETHOD(pic_disable_intr, mtk_gpio_pic_disable_intr),
650 DEVMETHOD(pic_enable_intr, mtk_gpio_pic_enable_intr),
651 DEVMETHOD(pic_map_intr, mtk_gpio_pic_map_intr),
652 DEVMETHOD(pic_post_filter, mtk_gpio_pic_post_filter),
653 DEVMETHOD(pic_post_ithread, mtk_gpio_pic_post_ithread),
654 DEVMETHOD(pic_pre_ithread, mtk_gpio_pic_pre_ithread),
655
656 /* ofw_bus interface */
657 DEVMETHOD(ofw_bus_get_node, mtk_gpio_get_node),
658
659 DEVMETHOD_END
660 };
661
662 static driver_t mtk_gpio_driver = {
663 "gpio",
664 mtk_gpio_methods,
665 sizeof(struct mtk_gpio_softc),
666 };
667
668 static devclass_t mtk_gpio_devclass;
669
670 EARLY_DRIVER_MODULE(mtk_gpio_v1, simplebus, mtk_gpio_driver,
671 mtk_gpio_devclass, 0, 0, BUS_PASS_INTERRUPT + BUS_PASS_ORDER_LATE);
672