1 /*-
2 * Copyright (c) 2009-2010 The FreeBSD Foundation
3 * All rights reserved.
4 *
5 * This software was developed by Semihalf under sponsorship from
6 * the FreeBSD Foundation.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30 #include <sys/cdefs.h>
31 __FBSDID("$FreeBSD: releng/11.0/sys/mips/beri/beri_simplebus.c 297199 2016-03-22 22:25:08Z jhibbits $");
32
33 #include "opt_platform.h"
34 #include <sys/param.h>
35 #include <sys/systm.h>
36 #include <sys/ktr.h>
37 #include <sys/kernel.h>
38 #include <sys/module.h>
39 #include <sys/bus.h>
40 #include <sys/rman.h>
41 #include <sys/malloc.h>
42
43 #include <dev/ofw/ofw_bus.h>
44 #include <dev/ofw/ofw_bus_subr.h>
45 #include <dev/ofw/openfirm.h>
46
47 #include <dev/fdt/fdt_common.h>
48 #include "fdt_ic_if.h"
49 #include "ofw_bus_if.h"
50
51 #ifdef DEBUG
52 #define debugf(fmt, args...) do { printf("%s(): ", __func__); \
53 printf(fmt,##args); } while (0)
54 #else
55 #define debugf(fmt, args...)
56 #endif
57
58 static MALLOC_DEFINE(M_SIMPLEBUS, "simplebus", "simplebus devices information");
59
60 struct simplebus_softc {
61 int sc_addr_cells;
62 int sc_size_cells;
63 };
64
65 struct simplebus_devinfo {
66 struct ofw_bus_devinfo di_ofw;
67 struct resource_list di_res;
68
69 /* Interrupts sense-level info for this device */
70 struct fdt_sense_level di_intr_sl[DI_MAX_INTR_NUM];
71 };
72
73 /*
74 * Prototypes.
75 */
76 static int simplebus_probe(device_t);
77 static int simplebus_attach(device_t);
78
79 static int simplebus_print_child(device_t, device_t);
80 static int simplebus_setup_intr(device_t, device_t, struct resource *, int,
81 driver_filter_t *, driver_intr_t *, void *, void **);
82 static int simplebus_teardown_intr(device_t, device_t, struct resource *,
83 void *);
84
85 static int simplebus_activate_resource(device_t, device_t, int, int,
86 struct resource *);
87 static struct resource *simplebus_alloc_resource(device_t, device_t, int,
88 int *, rman_res_t, rman_res_t, rman_res_t, u_int);
89 static int simplebus_deactivate_resource(device_t, device_t, int, int,
90 struct resource *);
91 static int simplebus_release_resource(device_t, device_t, int, int,
92 struct resource *);
93 static device_t simplebus_get_interrupt_parent(device_t);
94 static struct resource_list *simplebus_get_resource_list(device_t, device_t);
95
96 static ofw_bus_get_devinfo_t simplebus_get_devinfo;
97
98 /*
99 * Bus interface definition.
100 */
101 static device_method_t simplebus_methods[] = {
102 /* Device interface */
103 DEVMETHOD(device_probe, simplebus_probe),
104 DEVMETHOD(device_attach, simplebus_attach),
105 DEVMETHOD(device_detach, bus_generic_detach),
106 DEVMETHOD(device_shutdown, bus_generic_shutdown),
107 DEVMETHOD(device_suspend, bus_generic_suspend),
108 DEVMETHOD(device_resume, bus_generic_resume),
109
110 /* Bus interface */
111 DEVMETHOD(bus_print_child, simplebus_print_child),
112 DEVMETHOD(bus_alloc_resource, simplebus_alloc_resource),
113 DEVMETHOD(bus_release_resource, simplebus_release_resource),
114 DEVMETHOD(bus_activate_resource, simplebus_activate_resource),
115 DEVMETHOD(bus_deactivate_resource, simplebus_deactivate_resource),
116 DEVMETHOD(bus_setup_intr, simplebus_setup_intr),
117 DEVMETHOD(bus_teardown_intr, simplebus_teardown_intr),
118 DEVMETHOD(bus_get_resource_list, simplebus_get_resource_list),
119
120 /* OFW bus interface */
121 DEVMETHOD(ofw_bus_get_devinfo, simplebus_get_devinfo),
122 DEVMETHOD(ofw_bus_get_compat, ofw_bus_gen_get_compat),
123 DEVMETHOD(ofw_bus_get_model, ofw_bus_gen_get_model),
124 DEVMETHOD(ofw_bus_get_name, ofw_bus_gen_get_name),
125 DEVMETHOD(ofw_bus_get_node, ofw_bus_gen_get_node),
126 DEVMETHOD(ofw_bus_get_type, ofw_bus_gen_get_type),
127
128 { 0, 0 }
129 };
130
131 static driver_t simplebus_driver = {
132 "simplebus",
133 simplebus_methods,
134 sizeof(struct simplebus_softc)
135 };
136
137 devclass_t simplebus_devclass;
138
139 DRIVER_MODULE(beri_simplebus, ofwbus, simplebus_driver, simplebus_devclass, 0,
140 0);
141 DRIVER_MODULE(beri_simplebus, simplebus, simplebus_driver, simplebus_devclass,
142 0, 0);
143
144 static int
145 simplebus_probe(device_t dev)
146 {
147
148 if (!ofw_bus_status_okay(dev))
149 return (ENXIO);
150
151 if (!ofw_bus_is_compatible(dev, "simple-bus"))
152 return (ENXIO);
153
154 device_set_desc(dev, "Flattened device tree simple bus (BERI version)");
155
156 return (BUS_PROBE_SPECIFIC);
157 }
158
159 static int
160 simplebus_attach(device_t dev)
161 {
162 device_t dev_child;
163 struct simplebus_devinfo *di;
164 struct simplebus_softc *sc;
165 phandle_t dt_node, dt_child;
166
167 sc = device_get_softc(dev);
168
169 /*
170 * Walk simple-bus and add direct subordinates as our children.
171 */
172 dt_node = ofw_bus_get_node(dev);
173 for (dt_child = OF_child(dt_node); dt_child != 0;
174 dt_child = OF_peer(dt_child)) {
175
176 /* Check and process 'status' property. */
177 if (!(fdt_is_enabled(dt_child)))
178 continue;
179
180 if (!(fdt_pm_is_enabled(dt_child)))
181 continue;
182
183 di = malloc(sizeof(*di), M_SIMPLEBUS, M_WAITOK | M_ZERO);
184
185 if (ofw_bus_gen_setup_devinfo(&di->di_ofw, dt_child) != 0) {
186 free(di, M_SIMPLEBUS);
187 device_printf(dev, "could not set up devinfo\n");
188 continue;
189 }
190
191 resource_list_init(&di->di_res);
192 if (fdt_reg_to_rl(dt_child, &di->di_res)) {
193 device_printf(dev,
194 "%s: could not process 'reg' "
195 "property\n", di->di_ofw.obd_name);
196 ofw_bus_gen_destroy_devinfo(&di->di_ofw);
197 free(di, M_SIMPLEBUS);
198 continue;
199 }
200
201 if (ofw_bus_intr_to_rl(dev, dt_child, &di->di_res, NULL)) {
202 device_printf(dev, "%s: could not process "
203 "'interrupts' property\n", di->di_ofw.obd_name);
204 resource_list_free(&di->di_res);
205 ofw_bus_gen_destroy_devinfo(&di->di_ofw);
206 free(di, M_SIMPLEBUS);
207 continue;
208 }
209
210 /* Add newbus device for this FDT node */
211 dev_child = device_add_child(dev, NULL, -1);
212 if (dev_child == NULL) {
213 device_printf(dev, "could not add child: %s\n",
214 di->di_ofw.obd_name);
215 resource_list_free(&di->di_res);
216 ofw_bus_gen_destroy_devinfo(&di->di_ofw);
217 free(di, M_SIMPLEBUS);
218 continue;
219 }
220 #ifdef DEBUG
221 device_printf(dev, "added child: %s\n\n", di->di_ofw.obd_name);
222 #endif
223 device_set_ivars(dev_child, di);
224 }
225
226 return (bus_generic_attach(dev));
227 }
228
229 static int
230 simplebus_print_child(device_t dev, device_t child)
231 {
232 device_t ip;
233 struct simplebus_devinfo *di;
234 struct resource_list *rl;
235 int rv;
236
237 di = device_get_ivars(child);
238 rl = &di->di_res;
239
240 rv = 0;
241 rv += bus_print_child_header(dev, child);
242 rv += resource_list_print_type(rl, "mem", SYS_RES_MEMORY, "%#jx");
243 rv += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%jd");
244 if ((ip = simplebus_get_interrupt_parent(child)) != NULL)
245 rv += printf(" (%s)", device_get_nameunit(ip));
246 rv += bus_print_child_footer(dev, child);
247
248 return (rv);
249 }
250
251 static struct resource *
252 simplebus_alloc_resource(device_t bus, device_t child, int type, int *rid,
253 rman_res_t start, rman_res_t end, rman_res_t count, u_int flags)
254 {
255 device_t ic;
256 struct simplebus_devinfo *di;
257 struct resource_list_entry *rle;
258
259 /*
260 * Request for the default allocation with a given rid: use resource
261 * list stored in the local device info.
262 */
263 if (RMAN_IS_DEFAULT_RANGE(start, end)) {
264 if ((di = device_get_ivars(child)) == NULL)
265 return (NULL);
266
267 if (type == SYS_RES_IOPORT)
268 type = SYS_RES_MEMORY;
269
270 rle = resource_list_find(&di->di_res, type, *rid);
271 if (rle == NULL) {
272 if (bootverbose)
273 device_printf(bus, "no default resources for "
274 "rid = %d, type = %d\n", *rid, type);
275 return (NULL);
276 }
277 start = rle->start;
278 end = rle->end;
279 count = rle->count;
280 }
281
282 if (type == SYS_RES_IRQ &&
283 (ic = simplebus_get_interrupt_parent(child)) != NULL)
284 return(FDT_IC_ALLOC_INTR(ic, child, rid, start, flags));
285
286 return (bus_generic_alloc_resource(bus, child, type, rid, start, end,
287 count, flags));
288 }
289
290 static int
291 simplebus_activate_resource(device_t dev, device_t child, int type, int rid,
292 struct resource *r)
293 {
294 device_t ic;
295
296 if (type == SYS_RES_IRQ &&
297 (ic = simplebus_get_interrupt_parent(child)) != NULL)
298 return (FDT_IC_ACTIVATE_INTR(ic, r));
299
300 return (bus_generic_activate_resource(dev, child, type, rid, r));
301 }
302
303 static int
304 simplebus_deactivate_resource(device_t dev, device_t child, int type, int rid,
305 struct resource *r)
306 {
307 device_t ic;
308
309 if (type == SYS_RES_IRQ &&
310 (ic = simplebus_get_interrupt_parent(child)) != NULL)
311 return (FDT_IC_DEACTIVATE_INTR(ic, r));
312
313 return (bus_generic_deactivate_resource(dev, child, type, rid, r));
314 }
315
316 static int
317 simplebus_release_resource(device_t dev, device_t child, int type, int rid,
318 struct resource *r)
319 {
320 device_t ic;
321
322 if (type == SYS_RES_IRQ &&
323 (ic = simplebus_get_interrupt_parent(child)) != NULL)
324 return (FDT_IC_RELEASE_INTR(ic, r));
325
326 return (bus_generic_release_resource(dev, child, type, rid, r));
327 }
328
329 static struct resource_list *
330 simplebus_get_resource_list(device_t bus, device_t child)
331 {
332 struct simplebus_devinfo *di;
333
334 di = device_get_ivars(child);
335 return (&di->di_res);
336 }
337
338 static device_t
339 simplebus_get_interrupt_parent(device_t dev)
340 {
341 struct simplebus_devinfo *di;
342 struct fdt_ic *ic;
343 device_t ip;
344 phandle_t ph, iph;
345
346 ip = NULL;
347
348 di = device_get_ivars(dev);
349 if (di == NULL)
350 return (NULL);
351
352 if (OF_getencprop(di->di_ofw.obd_node, "interrupt-parent", &iph,
353 sizeof(iph)) > 0) {
354 ph = OF_node_from_xref(iph);
355 SLIST_FOREACH(ic, &fdt_ic_list_head, fdt_ics) {
356 if (ic->iph == ph) {
357 ip = ic->dev;
358 break;
359 }
360 }
361 }
362 return (ip);
363 }
364
365 static int
366 simplebus_setup_intr(device_t bus, device_t child, struct resource *res,
367 int flags, driver_filter_t *filter, driver_intr_t *ihand, void *arg,
368 void **cookiep)
369 {
370 struct simplebus_devinfo *di;
371 device_t ic;
372 enum intr_trigger trig;
373 enum intr_polarity pol;
374 int error, irq, rid;
375
376 di = device_get_ivars(child);
377 if (di == NULL)
378 return (ENXIO);
379
380 if (res == NULL)
381 return (EINVAL);
382
383 rid = rman_get_rid(res);
384 if (rid >= DI_MAX_INTR_NUM)
385 return (ENOENT);
386
387 ic = simplebus_get_interrupt_parent(child);
388
389 trig = di->di_intr_sl[rid].trig;
390 pol = di->di_intr_sl[rid].pol;
391 if (trig != INTR_TRIGGER_CONFORM || pol != INTR_POLARITY_CONFORM) {
392 irq = rman_get_start(res);
393 if (ic != NULL)
394 error = FDT_IC_CONFIG_INTR(ic, irq, trig, pol);
395 else
396 error = bus_generic_config_intr(bus, irq, trig, pol);
397 if (error)
398 return (error);
399 }
400
401 if (ic != NULL)
402 error = FDT_IC_SETUP_INTR(ic, child, res, flags, filter,
403 ihand, arg, cookiep);
404 else
405 error = bus_generic_setup_intr(bus, child, res, flags, filter,
406 ihand, arg, cookiep);
407 return (error);
408 }
409
410 static int
411 simplebus_teardown_intr(device_t bus, device_t child, struct resource *res,
412 void *cookie)
413 {
414 device_t ic;
415
416 if ((ic = simplebus_get_interrupt_parent(child)) != NULL)
417 return (FDT_IC_TEARDOWN_INTR(ic, child, res, cookie));
418
419 return (bus_generic_teardown_intr(bus, child, res, cookie));
420 }
421
422 static const struct ofw_bus_devinfo *
423 simplebus_get_devinfo(device_t bus, device_t child)
424 {
425 struct simplebus_devinfo *di;
426
427 di = device_get_ivars(child);
428 return (&di->di_ofw);
429 }
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