33#include <sys/kernel.h>
34#include <sys/malloc.h>
35#include <sys/module.h>
36
37#include <dev/gpio/gpiobusvar.h>
38
39#include "gpiobus_if.h"
40
41#undef GPIOBUS_DEBUG
42#ifdef GPIOBUS_DEBUG
43#define dprintf printf
44#else
45#define dprintf(x, arg...)
46#endif
47
48static void gpiobus_print_pins(struct gpiobus_ivar *, char *, size_t);
49static int gpiobus_parse_pins(struct gpiobus_softc *, device_t, int);
50static int gpiobus_probe(device_t);
51static int gpiobus_attach(device_t);
52static int gpiobus_detach(device_t);
53static int gpiobus_suspend(device_t);
54static int gpiobus_resume(device_t);
55static int gpiobus_print_child(device_t, device_t);
56static int gpiobus_child_location_str(device_t, device_t, char *, size_t);
57static int gpiobus_child_pnpinfo_str(device_t, device_t, char *, size_t);
58static device_t gpiobus_add_child(device_t, u_int, const char *, int);
59static void gpiobus_hinted_child(device_t, const char *, int);
60
61/*
62 * GPIOBUS interface
63 */
64static int gpiobus_acquire_bus(device_t, device_t, int);
65static void gpiobus_release_bus(device_t, device_t);
66static int gpiobus_pin_setflags(device_t, device_t, uint32_t, uint32_t);
67static int gpiobus_pin_getflags(device_t, device_t, uint32_t, uint32_t*);
68static int gpiobus_pin_getcaps(device_t, device_t, uint32_t, uint32_t*);
69static int gpiobus_pin_set(device_t, device_t, uint32_t, unsigned int);
70static int gpiobus_pin_get(device_t, device_t, uint32_t, unsigned int*);
71static int gpiobus_pin_toggle(device_t, device_t, uint32_t);
72
| 34#include <sys/kernel.h>
35#include <sys/malloc.h>
36#include <sys/module.h>
37
38#include <dev/gpio/gpiobusvar.h>
39
40#include "gpiobus_if.h"
41
42#undef GPIOBUS_DEBUG
43#ifdef GPIOBUS_DEBUG
44#define dprintf printf
45#else
46#define dprintf(x, arg...)
47#endif
48
49static void gpiobus_print_pins(struct gpiobus_ivar *, char *, size_t);
50static int gpiobus_parse_pins(struct gpiobus_softc *, device_t, int);
51static int gpiobus_probe(device_t);
52static int gpiobus_attach(device_t);
53static int gpiobus_detach(device_t);
54static int gpiobus_suspend(device_t);
55static int gpiobus_resume(device_t);
56static int gpiobus_print_child(device_t, device_t);
57static int gpiobus_child_location_str(device_t, device_t, char *, size_t);
58static int gpiobus_child_pnpinfo_str(device_t, device_t, char *, size_t);
59static device_t gpiobus_add_child(device_t, u_int, const char *, int);
60static void gpiobus_hinted_child(device_t, const char *, int);
61
62/*
63 * GPIOBUS interface
64 */
65static int gpiobus_acquire_bus(device_t, device_t, int);
66static void gpiobus_release_bus(device_t, device_t);
67static int gpiobus_pin_setflags(device_t, device_t, uint32_t, uint32_t);
68static int gpiobus_pin_getflags(device_t, device_t, uint32_t, uint32_t*);
69static int gpiobus_pin_getcaps(device_t, device_t, uint32_t, uint32_t*);
70static int gpiobus_pin_set(device_t, device_t, uint32_t, unsigned int);
71static int gpiobus_pin_get(device_t, device_t, uint32_t, unsigned int*);
72static int gpiobus_pin_toggle(device_t, device_t, uint32_t);
73
|
73static void
74gpiobus_print_pins(struct gpiobus_ivar *devi, char *buf, size_t buflen)
75{
76 char tmp[128];
77 int i, range_start, range_stop, need_coma;
78
79 if (devi->npins == 0)
80 return;
81
82 need_coma = 0;
83 range_start = range_stop = devi->pins[0];
84 for (i = 1; i < devi->npins; i++) {
85 if (devi->pins[i] != (range_stop + 1)) {
86 if (need_coma)
87 strlcat(buf, ",", buflen);
88 memset(tmp, 0, sizeof(tmp));
89 if (range_start != range_stop)
90 snprintf(tmp, sizeof(tmp) - 1, "%d-%d",
91 range_start, range_stop);
92 else
93 snprintf(tmp, sizeof(tmp) - 1, "%d",
94 range_start);
95 strlcat(buf, tmp, buflen);
96
97 range_start = range_stop = devi->pins[i];
98 need_coma = 1;
99 }
100 else
101 range_stop++;
102 }
103
104 if (need_coma)
105 strlcat(buf, ",", buflen);
106 memset(tmp, 0, sizeof(tmp));
107 if (range_start != range_stop)
108 snprintf(tmp, sizeof(tmp) - 1, "%d-%d",
109 range_start, range_stop);
110 else
111 snprintf(tmp, sizeof(tmp) - 1, "%d",
112 range_start);
113 strlcat(buf, tmp, buflen);
114}
115
116int
117gpiobus_init_softc(device_t dev)
118{
119 struct gpiobus_softc *sc;
120
121 sc = GPIOBUS_SOFTC(dev);
122 sc->sc_busdev = dev;
123 sc->sc_dev = device_get_parent(dev);
124 sc->sc_intr_rman.rm_type = RMAN_ARRAY;
125 sc->sc_intr_rman.rm_descr = "GPIO Interrupts";
126 if (rman_init(&sc->sc_intr_rman) != 0 ||
127 rman_manage_region(&sc->sc_intr_rman, 0, ~0) != 0)
128 panic("%s: failed to set up rman.", __func__);
129
130 if (GPIO_PIN_MAX(sc->sc_dev, &sc->sc_npins) != 0)
131 return (ENXIO);
132
133 KASSERT(sc->sc_npins != 0, ("GPIO device with no pins"));
134
135 /* Pins = GPIO_PIN_MAX() + 1 */
136 sc->sc_npins++;
137
138 sc->sc_pins_mapped = malloc(sizeof(int) * sc->sc_npins, M_DEVBUF,
139 M_NOWAIT | M_ZERO);
140 if (sc->sc_pins_mapped == NULL)
141 return (ENOMEM);
142
143 /* Initialize the bus lock. */
144 GPIOBUS_LOCK_INIT(sc);
145
146 return (0);
147}
148
149static int
150gpiobus_parse_pins(struct gpiobus_softc *sc, device_t child, int mask)
151{
152 struct gpiobus_ivar *devi = GPIOBUS_IVAR(child);
153 int i, npins;
154
155 npins = 0;
156 for (i = 0; i < 32; i++) {
157 if (mask & (1 << i))
158 npins++;
159 }
160
161 if (npins == 0) {
162 device_printf(child, "empty pin mask\n");
163 return (EINVAL);
164 }
165
166 devi->npins = npins;
167 devi->pins = malloc(sizeof(uint32_t) * devi->npins, M_DEVBUF,
168 M_NOWAIT | M_ZERO);
169
170 if (!devi->pins)
171 return (ENOMEM);
172
173 npins = 0;
174 for (i = 0; i < 32; i++) {
175
176 if ((mask & (1 << i)) == 0)
177 continue;
178
179 if (i >= sc->sc_npins) {
180 device_printf(child,
181 "invalid pin %d, max: %d\n", i, sc->sc_npins - 1);
182 free(devi->pins, M_DEVBUF);
183 return (EINVAL);
184 }
185
186 devi->pins[npins++] = i;
187 /*
188 * Mark pin as mapped and give warning if it's already mapped
189 */
190 if (sc->sc_pins_mapped[i]) {
191 device_printf(child,
192 "warning: pin %d is already mapped\n", i);
193 free(devi->pins, M_DEVBUF);
194 return (EINVAL);
195 }
196 sc->sc_pins_mapped[i] = 1;
197 }
198
199 return (0);
200}
201
202static int
203gpiobus_probe(device_t dev)
204{
205 device_set_desc(dev, "GPIO bus");
206
207 return (BUS_PROBE_GENERIC);
208}
209
210static int
211gpiobus_attach(device_t dev)
212{
213 int err;
214
215 err = gpiobus_init_softc(dev);
216 if (err != 0)
217 return (err);
218
219 /*
220 * Get parent's pins and mark them as unmapped
221 */
222 bus_generic_probe(dev);
223 bus_enumerate_hinted_children(dev);
224
225 return (bus_generic_attach(dev));
226}
227
228/*
229 * Since this is not a self-enumerating bus, and since we always add
230 * children in attach, we have to always delete children here.
231 */
232static int
233gpiobus_detach(device_t dev)
234{
235 struct gpiobus_softc *sc;
236 struct gpiobus_ivar *devi;
237 device_t *devlist;
238 int i, err, ndevs;
239
240 sc = GPIOBUS_SOFTC(dev);
241 KASSERT(mtx_initialized(&sc->sc_mtx),
242 ("gpiobus mutex not initialized"));
243 GPIOBUS_LOCK_DESTROY(sc);
244
245 if ((err = bus_generic_detach(dev)) != 0)
246 return (err);
247
248 if ((err = device_get_children(dev, &devlist, &ndevs)) != 0)
249 return (err);
250 for (i = 0; i < ndevs; i++) {
251 device_delete_child(dev, devlist[i]);
252 devi = GPIOBUS_IVAR(devlist[i]);
253 if (devi->pins) {
254 free(devi->pins, M_DEVBUF);
255 devi->pins = NULL;
256 }
257 }
258 free(devlist, M_TEMP);
259
260 if (sc->sc_pins_mapped) {
261 free(sc->sc_pins_mapped, M_DEVBUF);
262 sc->sc_pins_mapped = NULL;
263 }
264
265 return (0);
266}
267
268static int
269gpiobus_suspend(device_t dev)
270{
271
272 return (bus_generic_suspend(dev));
273}
274
275static int
276gpiobus_resume(device_t dev)
277{
278
279 return (bus_generic_resume(dev));
280}
281
282static int
283gpiobus_print_child(device_t dev, device_t child)
284{
285 char pins[128];
286 int retval = 0;
287 struct gpiobus_ivar *devi;
288
289 devi = GPIOBUS_IVAR(child);
290 memset(pins, 0, sizeof(pins));
291 retval += bus_print_child_header(dev, child);
292 retval += printf(" at pin(s) ");
293 gpiobus_print_pins(devi, pins, sizeof(pins));
294 retval += printf("%s", pins);
295 resource_list_print_type(&devi->rl, "irq", SYS_RES_IRQ, "%ld");
296 retval += bus_print_child_footer(dev, child);
297
298 return (retval);
299}
300
301static int
302gpiobus_child_location_str(device_t bus, device_t child, char *buf,
303 size_t buflen)
304{
305 struct gpiobus_ivar *devi;
306
307 devi = GPIOBUS_IVAR(child);
308 strlcpy(buf, "pin(s)=", buflen);
309 gpiobus_print_pins(devi, buf, buflen);
310
311 return (0);
312}
313
314static int
315gpiobus_child_pnpinfo_str(device_t bus, device_t child, char *buf,
316 size_t buflen)
317{
318
319 *buf = '\0';
320 return (0);
321}
322
323static device_t
324gpiobus_add_child(device_t dev, u_int order, const char *name, int unit)
325{
326 device_t child;
327 struct gpiobus_ivar *devi;
328
329 child = device_add_child_ordered(dev, order, name, unit);
330 if (child == NULL)
331 return (child);
332 devi = malloc(sizeof(struct gpiobus_ivar), M_DEVBUF, M_NOWAIT | M_ZERO);
333 if (devi == NULL) {
334 device_delete_child(dev, child);
335 return (0);
336 }
337 resource_list_init(&devi->rl);
338 device_set_ivars(child, devi);
339
340 return (child);
341}
342
343static void
344gpiobus_hinted_child(device_t bus, const char *dname, int dunit)
345{
346 struct gpiobus_softc *sc = GPIOBUS_SOFTC(bus);
347 struct gpiobus_ivar *devi;
348 device_t child;
349 int irq, pins;
350
351 child = BUS_ADD_CHILD(bus, 0, dname, dunit);
352 devi = GPIOBUS_IVAR(child);
353 resource_int_value(dname, dunit, "pins", &pins);
354 if (gpiobus_parse_pins(sc, child, pins))
355 device_delete_child(bus, child);
356 if (resource_int_value(dname, dunit, "irq", &irq) == 0) {
357 if (bus_set_resource(child, SYS_RES_IRQ, 0, irq, 1) != 0)
358 device_printf(bus,
359 "warning: bus_set_resource() failed\n");
360 }
361}
362
363static int
364gpiobus_set_resource(device_t dev, device_t child, int type, int rid,
365 u_long start, u_long count)
366{
367 struct gpiobus_ivar *devi;
368 struct resource_list_entry *rle;
369
370 dprintf("%s: entry (%p, %p, %d, %d, %p, %ld)\n",
371 __func__, dev, child, type, rid, (void *)(intptr_t)start, count);
372 devi = GPIOBUS_IVAR(child);
373 rle = resource_list_add(&devi->rl, type, rid, start,
374 start + count - 1, count);
375 if (rle == NULL)
376 return (ENXIO);
377
378 return (0);
379}
380
381static struct resource *
382gpiobus_alloc_resource(device_t bus, device_t child, int type, int *rid,
383 u_long start, u_long end, u_long count, u_int flags)
384{
385 struct gpiobus_softc *sc;
386 struct resource *rv;
387 struct resource_list *rl;
388 struct resource_list_entry *rle;
389 int isdefault;
390
391 if (type != SYS_RES_IRQ)
392 return (NULL);
393 isdefault = (start == 0UL && end == ~0UL && count == 1);
394 rle = NULL;
395 if (isdefault) {
396 rl = BUS_GET_RESOURCE_LIST(bus, child);
397 if (rl == NULL)
398 return (NULL);
399 rle = resource_list_find(rl, type, *rid);
400 if (rle == NULL)
401 return (NULL);
402 if (rle->res != NULL)
403 panic("%s: resource entry is busy", __func__);
404 start = rle->start;
405 count = rle->count;
406 end = rle->end;
407 }
408 sc = device_get_softc(bus);
409 rv = rman_reserve_resource(&sc->sc_intr_rman, start, end, count, flags,
410 child);
411 if (rv == NULL)
412 return (NULL);
413 rman_set_rid(rv, *rid);
414 if ((flags & RF_ACTIVE) != 0 &&
415 bus_activate_resource(child, type, *rid, rv) != 0) {
416 rman_release_resource(rv);
417 return (NULL);
418 }
419
420 return (rv);
421}
422
423static int
424gpiobus_release_resource(device_t bus __unused, device_t child, int type,
425 int rid, struct resource *r)
426{
427 int error;
428
429 if (rman_get_flags(r) & RF_ACTIVE) {
430 error = bus_deactivate_resource(child, type, rid, r);
431 if (error)
432 return (error);
433 }
434
435 return (rman_release_resource(r));
436}
437
438static struct resource_list *
439gpiobus_get_resource_list(device_t bus __unused, device_t child)
440{
441 struct gpiobus_ivar *ivar;
442
443 ivar = GPIOBUS_IVAR(child);
444
445 return (&ivar->rl);
446}
447
448static int
449gpiobus_acquire_bus(device_t busdev, device_t child, int how)
450{
451 struct gpiobus_softc *sc;
452
453 sc = device_get_softc(busdev);
454 GPIOBUS_ASSERT_UNLOCKED(sc);
455 GPIOBUS_LOCK(sc);
456 if (sc->sc_owner != NULL) {
457 if (how == GPIOBUS_DONTWAIT) {
458 GPIOBUS_UNLOCK(sc);
459 return (EWOULDBLOCK);
460 }
461 while (sc->sc_owner != NULL)
462 mtx_sleep(sc, &sc->sc_mtx, 0, "gpiobuswait", 0);
463 }
464 sc->sc_owner = child;
465 GPIOBUS_UNLOCK(sc);
466
467 return (0);
468}
469
470static void
471gpiobus_release_bus(device_t busdev, device_t child)
472{
473 struct gpiobus_softc *sc;
474
475 sc = device_get_softc(busdev);
476 GPIOBUS_ASSERT_UNLOCKED(sc);
477 GPIOBUS_LOCK(sc);
478 if (sc->sc_owner == NULL)
479 panic("gpiobus: releasing unowned bus.");
480 if (sc->sc_owner != child)
481 panic("gpiobus: you don't own the bus. game over.");
482 sc->sc_owner = NULL;
483 wakeup(sc);
484 GPIOBUS_UNLOCK(sc);
485}
486
487static int
488gpiobus_pin_setflags(device_t dev, device_t child, uint32_t pin,
489 uint32_t flags)
490{
491 struct gpiobus_softc *sc = GPIOBUS_SOFTC(dev);
492 struct gpiobus_ivar *devi = GPIOBUS_IVAR(child);
| 91static void
92gpiobus_print_pins(struct gpiobus_ivar *devi, char *buf, size_t buflen)
93{
94 char tmp[128];
95 int i, range_start, range_stop, need_coma;
96
97 if (devi->npins == 0)
98 return;
99
100 need_coma = 0;
101 range_start = range_stop = devi->pins[0];
102 for (i = 1; i < devi->npins; i++) {
103 if (devi->pins[i] != (range_stop + 1)) {
104 if (need_coma)
105 strlcat(buf, ",", buflen);
106 memset(tmp, 0, sizeof(tmp));
107 if (range_start != range_stop)
108 snprintf(tmp, sizeof(tmp) - 1, "%d-%d",
109 range_start, range_stop);
110 else
111 snprintf(tmp, sizeof(tmp) - 1, "%d",
112 range_start);
113 strlcat(buf, tmp, buflen);
114
115 range_start = range_stop = devi->pins[i];
116 need_coma = 1;
117 }
118 else
119 range_stop++;
120 }
121
122 if (need_coma)
123 strlcat(buf, ",", buflen);
124 memset(tmp, 0, sizeof(tmp));
125 if (range_start != range_stop)
126 snprintf(tmp, sizeof(tmp) - 1, "%d-%d",
127 range_start, range_stop);
128 else
129 snprintf(tmp, sizeof(tmp) - 1, "%d",
130 range_start);
131 strlcat(buf, tmp, buflen);
132}
133
134int
135gpiobus_init_softc(device_t dev)
136{
137 struct gpiobus_softc *sc;
138
139 sc = GPIOBUS_SOFTC(dev);
140 sc->sc_busdev = dev;
141 sc->sc_dev = device_get_parent(dev);
142 sc->sc_intr_rman.rm_type = RMAN_ARRAY;
143 sc->sc_intr_rman.rm_descr = "GPIO Interrupts";
144 if (rman_init(&sc->sc_intr_rman) != 0 ||
145 rman_manage_region(&sc->sc_intr_rman, 0, ~0) != 0)
146 panic("%s: failed to set up rman.", __func__);
147
148 if (GPIO_PIN_MAX(sc->sc_dev, &sc->sc_npins) != 0)
149 return (ENXIO);
150
151 KASSERT(sc->sc_npins != 0, ("GPIO device with no pins"));
152
153 /* Pins = GPIO_PIN_MAX() + 1 */
154 sc->sc_npins++;
155
156 sc->sc_pins_mapped = malloc(sizeof(int) * sc->sc_npins, M_DEVBUF,
157 M_NOWAIT | M_ZERO);
158 if (sc->sc_pins_mapped == NULL)
159 return (ENOMEM);
160
161 /* Initialize the bus lock. */
162 GPIOBUS_LOCK_INIT(sc);
163
164 return (0);
165}
166
167static int
168gpiobus_parse_pins(struct gpiobus_softc *sc, device_t child, int mask)
169{
170 struct gpiobus_ivar *devi = GPIOBUS_IVAR(child);
171 int i, npins;
172
173 npins = 0;
174 for (i = 0; i < 32; i++) {
175 if (mask & (1 << i))
176 npins++;
177 }
178
179 if (npins == 0) {
180 device_printf(child, "empty pin mask\n");
181 return (EINVAL);
182 }
183
184 devi->npins = npins;
185 devi->pins = malloc(sizeof(uint32_t) * devi->npins, M_DEVBUF,
186 M_NOWAIT | M_ZERO);
187
188 if (!devi->pins)
189 return (ENOMEM);
190
191 npins = 0;
192 for (i = 0; i < 32; i++) {
193
194 if ((mask & (1 << i)) == 0)
195 continue;
196
197 if (i >= sc->sc_npins) {
198 device_printf(child,
199 "invalid pin %d, max: %d\n", i, sc->sc_npins - 1);
200 free(devi->pins, M_DEVBUF);
201 return (EINVAL);
202 }
203
204 devi->pins[npins++] = i;
205 /*
206 * Mark pin as mapped and give warning if it's already mapped
207 */
208 if (sc->sc_pins_mapped[i]) {
209 device_printf(child,
210 "warning: pin %d is already mapped\n", i);
211 free(devi->pins, M_DEVBUF);
212 return (EINVAL);
213 }
214 sc->sc_pins_mapped[i] = 1;
215 }
216
217 return (0);
218}
219
220static int
221gpiobus_probe(device_t dev)
222{
223 device_set_desc(dev, "GPIO bus");
224
225 return (BUS_PROBE_GENERIC);
226}
227
228static int
229gpiobus_attach(device_t dev)
230{
231 int err;
232
233 err = gpiobus_init_softc(dev);
234 if (err != 0)
235 return (err);
236
237 /*
238 * Get parent's pins and mark them as unmapped
239 */
240 bus_generic_probe(dev);
241 bus_enumerate_hinted_children(dev);
242
243 return (bus_generic_attach(dev));
244}
245
246/*
247 * Since this is not a self-enumerating bus, and since we always add
248 * children in attach, we have to always delete children here.
249 */
250static int
251gpiobus_detach(device_t dev)
252{
253 struct gpiobus_softc *sc;
254 struct gpiobus_ivar *devi;
255 device_t *devlist;
256 int i, err, ndevs;
257
258 sc = GPIOBUS_SOFTC(dev);
259 KASSERT(mtx_initialized(&sc->sc_mtx),
260 ("gpiobus mutex not initialized"));
261 GPIOBUS_LOCK_DESTROY(sc);
262
263 if ((err = bus_generic_detach(dev)) != 0)
264 return (err);
265
266 if ((err = device_get_children(dev, &devlist, &ndevs)) != 0)
267 return (err);
268 for (i = 0; i < ndevs; i++) {
269 device_delete_child(dev, devlist[i]);
270 devi = GPIOBUS_IVAR(devlist[i]);
271 if (devi->pins) {
272 free(devi->pins, M_DEVBUF);
273 devi->pins = NULL;
274 }
275 }
276 free(devlist, M_TEMP);
277
278 if (sc->sc_pins_mapped) {
279 free(sc->sc_pins_mapped, M_DEVBUF);
280 sc->sc_pins_mapped = NULL;
281 }
282
283 return (0);
284}
285
286static int
287gpiobus_suspend(device_t dev)
288{
289
290 return (bus_generic_suspend(dev));
291}
292
293static int
294gpiobus_resume(device_t dev)
295{
296
297 return (bus_generic_resume(dev));
298}
299
300static int
301gpiobus_print_child(device_t dev, device_t child)
302{
303 char pins[128];
304 int retval = 0;
305 struct gpiobus_ivar *devi;
306
307 devi = GPIOBUS_IVAR(child);
308 memset(pins, 0, sizeof(pins));
309 retval += bus_print_child_header(dev, child);
310 retval += printf(" at pin(s) ");
311 gpiobus_print_pins(devi, pins, sizeof(pins));
312 retval += printf("%s", pins);
313 resource_list_print_type(&devi->rl, "irq", SYS_RES_IRQ, "%ld");
314 retval += bus_print_child_footer(dev, child);
315
316 return (retval);
317}
318
319static int
320gpiobus_child_location_str(device_t bus, device_t child, char *buf,
321 size_t buflen)
322{
323 struct gpiobus_ivar *devi;
324
325 devi = GPIOBUS_IVAR(child);
326 strlcpy(buf, "pin(s)=", buflen);
327 gpiobus_print_pins(devi, buf, buflen);
328
329 return (0);
330}
331
332static int
333gpiobus_child_pnpinfo_str(device_t bus, device_t child, char *buf,
334 size_t buflen)
335{
336
337 *buf = '\0';
338 return (0);
339}
340
341static device_t
342gpiobus_add_child(device_t dev, u_int order, const char *name, int unit)
343{
344 device_t child;
345 struct gpiobus_ivar *devi;
346
347 child = device_add_child_ordered(dev, order, name, unit);
348 if (child == NULL)
349 return (child);
350 devi = malloc(sizeof(struct gpiobus_ivar), M_DEVBUF, M_NOWAIT | M_ZERO);
351 if (devi == NULL) {
352 device_delete_child(dev, child);
353 return (0);
354 }
355 resource_list_init(&devi->rl);
356 device_set_ivars(child, devi);
357
358 return (child);
359}
360
361static void
362gpiobus_hinted_child(device_t bus, const char *dname, int dunit)
363{
364 struct gpiobus_softc *sc = GPIOBUS_SOFTC(bus);
365 struct gpiobus_ivar *devi;
366 device_t child;
367 int irq, pins;
368
369 child = BUS_ADD_CHILD(bus, 0, dname, dunit);
370 devi = GPIOBUS_IVAR(child);
371 resource_int_value(dname, dunit, "pins", &pins);
372 if (gpiobus_parse_pins(sc, child, pins))
373 device_delete_child(bus, child);
374 if (resource_int_value(dname, dunit, "irq", &irq) == 0) {
375 if (bus_set_resource(child, SYS_RES_IRQ, 0, irq, 1) != 0)
376 device_printf(bus,
377 "warning: bus_set_resource() failed\n");
378 }
379}
380
381static int
382gpiobus_set_resource(device_t dev, device_t child, int type, int rid,
383 u_long start, u_long count)
384{
385 struct gpiobus_ivar *devi;
386 struct resource_list_entry *rle;
387
388 dprintf("%s: entry (%p, %p, %d, %d, %p, %ld)\n",
389 __func__, dev, child, type, rid, (void *)(intptr_t)start, count);
390 devi = GPIOBUS_IVAR(child);
391 rle = resource_list_add(&devi->rl, type, rid, start,
392 start + count - 1, count);
393 if (rle == NULL)
394 return (ENXIO);
395
396 return (0);
397}
398
399static struct resource *
400gpiobus_alloc_resource(device_t bus, device_t child, int type, int *rid,
401 u_long start, u_long end, u_long count, u_int flags)
402{
403 struct gpiobus_softc *sc;
404 struct resource *rv;
405 struct resource_list *rl;
406 struct resource_list_entry *rle;
407 int isdefault;
408
409 if (type != SYS_RES_IRQ)
410 return (NULL);
411 isdefault = (start == 0UL && end == ~0UL && count == 1);
412 rle = NULL;
413 if (isdefault) {
414 rl = BUS_GET_RESOURCE_LIST(bus, child);
415 if (rl == NULL)
416 return (NULL);
417 rle = resource_list_find(rl, type, *rid);
418 if (rle == NULL)
419 return (NULL);
420 if (rle->res != NULL)
421 panic("%s: resource entry is busy", __func__);
422 start = rle->start;
423 count = rle->count;
424 end = rle->end;
425 }
426 sc = device_get_softc(bus);
427 rv = rman_reserve_resource(&sc->sc_intr_rman, start, end, count, flags,
428 child);
429 if (rv == NULL)
430 return (NULL);
431 rman_set_rid(rv, *rid);
432 if ((flags & RF_ACTIVE) != 0 &&
433 bus_activate_resource(child, type, *rid, rv) != 0) {
434 rman_release_resource(rv);
435 return (NULL);
436 }
437
438 return (rv);
439}
440
441static int
442gpiobus_release_resource(device_t bus __unused, device_t child, int type,
443 int rid, struct resource *r)
444{
445 int error;
446
447 if (rman_get_flags(r) & RF_ACTIVE) {
448 error = bus_deactivate_resource(child, type, rid, r);
449 if (error)
450 return (error);
451 }
452
453 return (rman_release_resource(r));
454}
455
456static struct resource_list *
457gpiobus_get_resource_list(device_t bus __unused, device_t child)
458{
459 struct gpiobus_ivar *ivar;
460
461 ivar = GPIOBUS_IVAR(child);
462
463 return (&ivar->rl);
464}
465
466static int
467gpiobus_acquire_bus(device_t busdev, device_t child, int how)
468{
469 struct gpiobus_softc *sc;
470
471 sc = device_get_softc(busdev);
472 GPIOBUS_ASSERT_UNLOCKED(sc);
473 GPIOBUS_LOCK(sc);
474 if (sc->sc_owner != NULL) {
475 if (how == GPIOBUS_DONTWAIT) {
476 GPIOBUS_UNLOCK(sc);
477 return (EWOULDBLOCK);
478 }
479 while (sc->sc_owner != NULL)
480 mtx_sleep(sc, &sc->sc_mtx, 0, "gpiobuswait", 0);
481 }
482 sc->sc_owner = child;
483 GPIOBUS_UNLOCK(sc);
484
485 return (0);
486}
487
488static void
489gpiobus_release_bus(device_t busdev, device_t child)
490{
491 struct gpiobus_softc *sc;
492
493 sc = device_get_softc(busdev);
494 GPIOBUS_ASSERT_UNLOCKED(sc);
495 GPIOBUS_LOCK(sc);
496 if (sc->sc_owner == NULL)
497 panic("gpiobus: releasing unowned bus.");
498 if (sc->sc_owner != child)
499 panic("gpiobus: you don't own the bus. game over.");
500 sc->sc_owner = NULL;
501 wakeup(sc);
502 GPIOBUS_UNLOCK(sc);
503}
504
505static int
506gpiobus_pin_setflags(device_t dev, device_t child, uint32_t pin,
507 uint32_t flags)
508{
509 struct gpiobus_softc *sc = GPIOBUS_SOFTC(dev);
510 struct gpiobus_ivar *devi = GPIOBUS_IVAR(child);
|
498}
499
500static int
501gpiobus_pin_getflags(device_t dev, device_t child, uint32_t pin,
502 uint32_t *flags)
503{
504 struct gpiobus_softc *sc = GPIOBUS_SOFTC(dev);
505 struct gpiobus_ivar *devi = GPIOBUS_IVAR(child);
506
507 if (pin >= devi->npins)
508 return (EINVAL);
509
510 return GPIO_PIN_GETFLAGS(sc->sc_dev, devi->pins[pin], flags);
511}
512
513static int
514gpiobus_pin_getcaps(device_t dev, device_t child, uint32_t pin,
515 uint32_t *caps)
516{
517 struct gpiobus_softc *sc = GPIOBUS_SOFTC(dev);
518 struct gpiobus_ivar *devi = GPIOBUS_IVAR(child);
519
520 if (pin >= devi->npins)
521 return (EINVAL);
522
523 return GPIO_PIN_GETCAPS(sc->sc_dev, devi->pins[pin], caps);
524}
525
526static int
527gpiobus_pin_set(device_t dev, device_t child, uint32_t pin,
528 unsigned int value)
529{
530 struct gpiobus_softc *sc = GPIOBUS_SOFTC(dev);
531 struct gpiobus_ivar *devi = GPIOBUS_IVAR(child);
532
533 if (pin >= devi->npins)
534 return (EINVAL);
535
536 return GPIO_PIN_SET(sc->sc_dev, devi->pins[pin], value);
537}
538
539static int
540gpiobus_pin_get(device_t dev, device_t child, uint32_t pin,
541 unsigned int *value)
542{
543 struct gpiobus_softc *sc = GPIOBUS_SOFTC(dev);
544 struct gpiobus_ivar *devi = GPIOBUS_IVAR(child);
545
546 if (pin >= devi->npins)
547 return (EINVAL);
548
549 return GPIO_PIN_GET(sc->sc_dev, devi->pins[pin], value);
550}
551
552static int
553gpiobus_pin_toggle(device_t dev, device_t child, uint32_t pin)
554{
555 struct gpiobus_softc *sc = GPIOBUS_SOFTC(dev);
556 struct gpiobus_ivar *devi = GPIOBUS_IVAR(child);
557
558 if (pin >= devi->npins)
559 return (EINVAL);
560
561 return GPIO_PIN_TOGGLE(sc->sc_dev, devi->pins[pin]);
562}
563
564static device_method_t gpiobus_methods[] = {
565 /* Device interface */
566 DEVMETHOD(device_probe, gpiobus_probe),
567 DEVMETHOD(device_attach, gpiobus_attach),
568 DEVMETHOD(device_detach, gpiobus_detach),
569 DEVMETHOD(device_shutdown, bus_generic_shutdown),
570 DEVMETHOD(device_suspend, gpiobus_suspend),
571 DEVMETHOD(device_resume, gpiobus_resume),
572
573 /* Bus interface */
574 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
575 DEVMETHOD(bus_config_intr, bus_generic_config_intr),
576 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
577 DEVMETHOD(bus_set_resource, gpiobus_set_resource),
578 DEVMETHOD(bus_alloc_resource, gpiobus_alloc_resource),
579 DEVMETHOD(bus_release_resource, gpiobus_release_resource),
580 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
581 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
582 DEVMETHOD(bus_get_resource_list, gpiobus_get_resource_list),
583 DEVMETHOD(bus_add_child, gpiobus_add_child),
584 DEVMETHOD(bus_print_child, gpiobus_print_child),
585 DEVMETHOD(bus_child_pnpinfo_str, gpiobus_child_pnpinfo_str),
586 DEVMETHOD(bus_child_location_str, gpiobus_child_location_str),
587 DEVMETHOD(bus_hinted_child, gpiobus_hinted_child),
588
589 /* GPIO protocol */
590 DEVMETHOD(gpiobus_acquire_bus, gpiobus_acquire_bus),
591 DEVMETHOD(gpiobus_release_bus, gpiobus_release_bus),
592 DEVMETHOD(gpiobus_pin_getflags, gpiobus_pin_getflags),
593 DEVMETHOD(gpiobus_pin_getcaps, gpiobus_pin_getcaps),
594 DEVMETHOD(gpiobus_pin_setflags, gpiobus_pin_setflags),
595 DEVMETHOD(gpiobus_pin_get, gpiobus_pin_get),
596 DEVMETHOD(gpiobus_pin_set, gpiobus_pin_set),
597 DEVMETHOD(gpiobus_pin_toggle, gpiobus_pin_toggle),
598
599 DEVMETHOD_END
600};
601
602driver_t gpiobus_driver = {
603 "gpiobus",
604 gpiobus_methods,
605 sizeof(struct gpiobus_softc)
606};
607
608devclass_t gpiobus_devclass;
609
610DRIVER_MODULE(gpiobus, gpio, gpiobus_driver, gpiobus_devclass, 0, 0);
611MODULE_VERSION(gpiobus, 1);
| 521}
522
523static int
524gpiobus_pin_getflags(device_t dev, device_t child, uint32_t pin,
525 uint32_t *flags)
526{
527 struct gpiobus_softc *sc = GPIOBUS_SOFTC(dev);
528 struct gpiobus_ivar *devi = GPIOBUS_IVAR(child);
529
530 if (pin >= devi->npins)
531 return (EINVAL);
532
533 return GPIO_PIN_GETFLAGS(sc->sc_dev, devi->pins[pin], flags);
534}
535
536static int
537gpiobus_pin_getcaps(device_t dev, device_t child, uint32_t pin,
538 uint32_t *caps)
539{
540 struct gpiobus_softc *sc = GPIOBUS_SOFTC(dev);
541 struct gpiobus_ivar *devi = GPIOBUS_IVAR(child);
542
543 if (pin >= devi->npins)
544 return (EINVAL);
545
546 return GPIO_PIN_GETCAPS(sc->sc_dev, devi->pins[pin], caps);
547}
548
549static int
550gpiobus_pin_set(device_t dev, device_t child, uint32_t pin,
551 unsigned int value)
552{
553 struct gpiobus_softc *sc = GPIOBUS_SOFTC(dev);
554 struct gpiobus_ivar *devi = GPIOBUS_IVAR(child);
555
556 if (pin >= devi->npins)
557 return (EINVAL);
558
559 return GPIO_PIN_SET(sc->sc_dev, devi->pins[pin], value);
560}
561
562static int
563gpiobus_pin_get(device_t dev, device_t child, uint32_t pin,
564 unsigned int *value)
565{
566 struct gpiobus_softc *sc = GPIOBUS_SOFTC(dev);
567 struct gpiobus_ivar *devi = GPIOBUS_IVAR(child);
568
569 if (pin >= devi->npins)
570 return (EINVAL);
571
572 return GPIO_PIN_GET(sc->sc_dev, devi->pins[pin], value);
573}
574
575static int
576gpiobus_pin_toggle(device_t dev, device_t child, uint32_t pin)
577{
578 struct gpiobus_softc *sc = GPIOBUS_SOFTC(dev);
579 struct gpiobus_ivar *devi = GPIOBUS_IVAR(child);
580
581 if (pin >= devi->npins)
582 return (EINVAL);
583
584 return GPIO_PIN_TOGGLE(sc->sc_dev, devi->pins[pin]);
585}
586
587static device_method_t gpiobus_methods[] = {
588 /* Device interface */
589 DEVMETHOD(device_probe, gpiobus_probe),
590 DEVMETHOD(device_attach, gpiobus_attach),
591 DEVMETHOD(device_detach, gpiobus_detach),
592 DEVMETHOD(device_shutdown, bus_generic_shutdown),
593 DEVMETHOD(device_suspend, gpiobus_suspend),
594 DEVMETHOD(device_resume, gpiobus_resume),
595
596 /* Bus interface */
597 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
598 DEVMETHOD(bus_config_intr, bus_generic_config_intr),
599 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
600 DEVMETHOD(bus_set_resource, gpiobus_set_resource),
601 DEVMETHOD(bus_alloc_resource, gpiobus_alloc_resource),
602 DEVMETHOD(bus_release_resource, gpiobus_release_resource),
603 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
604 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
605 DEVMETHOD(bus_get_resource_list, gpiobus_get_resource_list),
606 DEVMETHOD(bus_add_child, gpiobus_add_child),
607 DEVMETHOD(bus_print_child, gpiobus_print_child),
608 DEVMETHOD(bus_child_pnpinfo_str, gpiobus_child_pnpinfo_str),
609 DEVMETHOD(bus_child_location_str, gpiobus_child_location_str),
610 DEVMETHOD(bus_hinted_child, gpiobus_hinted_child),
611
612 /* GPIO protocol */
613 DEVMETHOD(gpiobus_acquire_bus, gpiobus_acquire_bus),
614 DEVMETHOD(gpiobus_release_bus, gpiobus_release_bus),
615 DEVMETHOD(gpiobus_pin_getflags, gpiobus_pin_getflags),
616 DEVMETHOD(gpiobus_pin_getcaps, gpiobus_pin_getcaps),
617 DEVMETHOD(gpiobus_pin_setflags, gpiobus_pin_setflags),
618 DEVMETHOD(gpiobus_pin_get, gpiobus_pin_get),
619 DEVMETHOD(gpiobus_pin_set, gpiobus_pin_set),
620 DEVMETHOD(gpiobus_pin_toggle, gpiobus_pin_toggle),
621
622 DEVMETHOD_END
623};
624
625driver_t gpiobus_driver = {
626 "gpiobus",
627 gpiobus_methods,
628 sizeof(struct gpiobus_softc)
629};
630
631devclass_t gpiobus_devclass;
632
633DRIVER_MODULE(gpiobus, gpio, gpiobus_driver, gpiobus_devclass, 0, 0);
634MODULE_VERSION(gpiobus, 1);
|