2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2013 Nathan Whitehorn
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
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.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, 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
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD$");
31 #include <sys/param.h>
32 #include <sys/systm.h>
33 #include <sys/module.h>
36 #include <sys/kernel.h>
39 #include <dev/ofw/openfirm.h>
40 #include <dev/ofw/ofw_bus.h>
41 #include <dev/ofw/ofw_bus_subr.h>
43 #include <dev/fdt/simplebus.h>
48 static int simplebus_probe(device_t dev);
49 static struct resource *simplebus_alloc_resource(device_t, device_t, int,
50 int *, rman_res_t, rman_res_t, rman_res_t, u_int);
51 static void simplebus_probe_nomatch(device_t bus, device_t child);
52 static int simplebus_print_child(device_t bus, device_t child);
53 static device_t simplebus_add_child(device_t dev, u_int order,
54 const char *name, int unit);
55 static struct resource_list *simplebus_get_resource_list(device_t bus,
58 static ssize_t simplebus_get_property(device_t bus, device_t child,
59 const char *propname, void *propvalue, size_t size);
63 static const struct ofw_bus_devinfo *simplebus_get_devinfo(device_t bus,
69 static device_method_t simplebus_methods[] = {
70 /* Device interface */
71 DEVMETHOD(device_probe, simplebus_probe),
72 DEVMETHOD(device_attach, simplebus_attach),
73 DEVMETHOD(device_detach, simplebus_detach),
74 DEVMETHOD(device_shutdown, bus_generic_shutdown),
75 DEVMETHOD(device_suspend, bus_generic_suspend),
76 DEVMETHOD(device_resume, bus_generic_resume),
79 DEVMETHOD(bus_add_child, simplebus_add_child),
80 DEVMETHOD(bus_print_child, simplebus_print_child),
81 DEVMETHOD(bus_probe_nomatch, simplebus_probe_nomatch),
82 DEVMETHOD(bus_read_ivar, bus_generic_read_ivar),
83 DEVMETHOD(bus_write_ivar, bus_generic_write_ivar),
84 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
85 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
86 DEVMETHOD(bus_alloc_resource, simplebus_alloc_resource),
87 DEVMETHOD(bus_release_resource, bus_generic_release_resource),
88 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
89 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
90 DEVMETHOD(bus_adjust_resource, bus_generic_adjust_resource),
91 DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource),
92 DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource),
93 DEVMETHOD(bus_child_pnpinfo, ofw_bus_gen_child_pnpinfo),
94 DEVMETHOD(bus_get_resource_list, simplebus_get_resource_list),
95 DEVMETHOD(bus_get_property, simplebus_get_property),
97 /* ofw_bus interface */
98 DEVMETHOD(ofw_bus_get_devinfo, simplebus_get_devinfo),
99 DEVMETHOD(ofw_bus_get_compat, ofw_bus_gen_get_compat),
100 DEVMETHOD(ofw_bus_get_model, ofw_bus_gen_get_model),
101 DEVMETHOD(ofw_bus_get_name, ofw_bus_gen_get_name),
102 DEVMETHOD(ofw_bus_get_node, ofw_bus_gen_get_node),
103 DEVMETHOD(ofw_bus_get_type, ofw_bus_gen_get_type),
108 DEFINE_CLASS_0(simplebus, simplebus_driver, simplebus_methods,
109 sizeof(struct simplebus_softc));
111 static devclass_t simplebus_devclass;
112 EARLY_DRIVER_MODULE(simplebus, ofwbus, simplebus_driver, simplebus_devclass,
114 EARLY_DRIVER_MODULE(simplebus, simplebus, simplebus_driver, simplebus_devclass,
115 0, 0, BUS_PASS_BUS + BUS_PASS_ORDER_MIDDLE);
118 simplebus_probe(device_t dev)
121 if (!ofw_bus_status_okay(dev))
124 * XXX We should attach only to pure' compatible = "simple-bus"',
125 * without any other compatible string.
126 * For now, filter only know cases:
127 * "syscon", "simple-bus"; is handled by fdt/syscon driver
128 * "simple-mfd", "simple-bus"; is handled by fdt/simple-mfd driver
130 if (ofw_bus_is_compatible(dev, "syscon") ||
131 ofw_bus_is_compatible(dev, "simple-mfd"))
135 * FDT data puts a "simple-bus" compatible string on many things that
136 * have children but aren't really buses in our world. Without a
137 * ranges property we will fail to attach, so just fail to probe too.
139 if (!(ofw_bus_is_compatible(dev, "simple-bus") &&
140 ofw_bus_has_prop(dev, "ranges")) &&
141 (ofw_bus_get_type(dev) == NULL || strcmp(ofw_bus_get_type(dev),
145 device_set_desc(dev, "Flattened device tree simple bus");
147 return (BUS_PROBE_GENERIC);
151 simplebus_attach_impl(device_t dev)
153 struct simplebus_softc *sc;
156 sc = device_get_softc(dev);
157 simplebus_init(dev, 0);
158 if ((sc->flags & SB_FLAG_NO_RANGES) == 0 &&
159 simplebus_fill_ranges(sc->node, sc) < 0) {
160 device_printf(dev, "could not get ranges\n");
165 * In principle, simplebus could have an interrupt map, but ignore that
169 for (node = OF_child(sc->node); node > 0; node = OF_peer(node))
170 simplebus_add_device(dev, node, 0, NULL, -1, NULL);
176 simplebus_attach(device_t dev)
180 rv = simplebus_attach_impl(dev);
184 return (bus_generic_attach(dev));
188 simplebus_detach(device_t dev)
190 struct simplebus_softc *sc;
192 sc = device_get_softc(dev);
193 if (sc->ranges != NULL)
194 free(sc->ranges, M_DEVBUF);
196 return (bus_generic_detach(dev));
200 simplebus_init(device_t dev, phandle_t node)
202 struct simplebus_softc *sc;
204 sc = device_get_softc(dev);
206 node = ofw_bus_get_node(dev);
211 * Some important numbers
214 OF_getencprop(node, "#address-cells", &sc->acells, sizeof(sc->acells));
216 OF_getencprop(node, "#size-cells", &sc->scells, sizeof(sc->scells));
220 simplebus_fill_ranges(phandle_t node, struct simplebus_softc *sc)
222 int host_address_cells;
224 ssize_t nbase_ranges;
228 err = OF_searchencprop(OF_parent(node), "#address-cells",
229 &host_address_cells, sizeof(host_address_cells));
233 nbase_ranges = OF_getproplen(node, "ranges");
234 if (nbase_ranges < 0)
236 sc->nranges = nbase_ranges / sizeof(cell_t) /
237 (sc->acells + host_address_cells + sc->scells);
238 if (sc->nranges == 0)
241 sc->ranges = malloc(sc->nranges * sizeof(sc->ranges[0]),
243 base_ranges = malloc(nbase_ranges, M_DEVBUF, M_WAITOK);
244 OF_getencprop(node, "ranges", base_ranges, nbase_ranges);
246 for (i = 0, j = 0; i < sc->nranges; i++) {
247 sc->ranges[i].bus = 0;
248 for (k = 0; k < sc->acells; k++) {
249 sc->ranges[i].bus <<= 32;
250 sc->ranges[i].bus |= base_ranges[j++];
252 sc->ranges[i].host = 0;
253 for (k = 0; k < host_address_cells; k++) {
254 sc->ranges[i].host <<= 32;
255 sc->ranges[i].host |= base_ranges[j++];
257 sc->ranges[i].size = 0;
258 for (k = 0; k < sc->scells; k++) {
259 sc->ranges[i].size <<= 32;
260 sc->ranges[i].size |= base_ranges[j++];
264 free(base_ranges, M_DEVBUF);
265 return (sc->nranges);
268 struct simplebus_devinfo *
269 simplebus_setup_dinfo(device_t dev, phandle_t node,
270 struct simplebus_devinfo *di)
272 struct simplebus_softc *sc;
273 struct simplebus_devinfo *ndi;
275 sc = device_get_softc(dev);
277 ndi = malloc(sizeof(*ndi), M_DEVBUF, M_WAITOK | M_ZERO);
280 if (ofw_bus_gen_setup_devinfo(&ndi->obdinfo, node) != 0) {
286 resource_list_init(&ndi->rl);
287 ofw_bus_reg_to_rl(dev, node, sc->acells, sc->scells, &ndi->rl);
288 ofw_bus_intr_to_rl(dev, node, &ndi->rl, NULL);
294 simplebus_add_device(device_t dev, phandle_t node, u_int order,
295 const char *name, int unit, struct simplebus_devinfo *di)
297 struct simplebus_devinfo *ndi;
300 if ((ndi = simplebus_setup_dinfo(dev, node, di)) == NULL)
302 cdev = device_add_child_ordered(dev, order, name, unit);
304 device_printf(dev, "<%s>: device_add_child failed\n",
305 ndi->obdinfo.obd_name);
306 resource_list_free(&ndi->rl);
307 ofw_bus_gen_destroy_devinfo(&ndi->obdinfo);
312 device_set_ivars(cdev, ndi);
318 simplebus_add_child(device_t dev, u_int order, const char *name, int unit)
321 struct simplebus_devinfo *ndi;
323 cdev = device_add_child_ordered(dev, order, name, unit);
327 ndi = malloc(sizeof(*ndi), M_DEVBUF, M_WAITOK | M_ZERO);
328 ndi->obdinfo.obd_node = -1;
329 resource_list_init(&ndi->rl);
330 device_set_ivars(cdev, ndi);
335 static const struct ofw_bus_devinfo *
336 simplebus_get_devinfo(device_t bus __unused, device_t child)
338 struct simplebus_devinfo *ndi;
340 ndi = device_get_ivars(child);
343 return (&ndi->obdinfo);
346 static struct resource_list *
347 simplebus_get_resource_list(device_t bus __unused, device_t child)
349 struct simplebus_devinfo *ndi;
351 ndi = device_get_ivars(child);
358 simplebus_get_property(device_t bus, device_t child, const char *propname,
359 void *propvalue, size_t size)
361 phandle_t node = ofw_bus_get_node(child);
363 if (propvalue == NULL || size == 0)
364 return (OF_getproplen(node, propname));
366 return (OF_getencprop(node, propname, propvalue, size));
369 static struct resource *
370 simplebus_alloc_resource(device_t bus, device_t child, int type, int *rid,
371 rman_res_t start, rman_res_t end, rman_res_t count, u_int flags)
373 struct simplebus_softc *sc;
374 struct simplebus_devinfo *di;
375 struct resource_list_entry *rle;
378 sc = device_get_softc(bus);
381 * Request for the default allocation with a given rid: use resource
382 * list stored in the local device info.
384 if (RMAN_IS_DEFAULT_RANGE(start, end)) {
385 if ((di = device_get_ivars(child)) == NULL)
388 if (type == SYS_RES_IOPORT)
389 type = SYS_RES_MEMORY;
391 rle = resource_list_find(&di->rl, type, *rid);
394 device_printf(bus, "no default resources for "
395 "rid = %d, type = %d\n", *rid, type);
403 if (type == SYS_RES_MEMORY) {
404 /* Remap through ranges property */
405 for (j = 0; j < sc->nranges; j++) {
406 if (start >= sc->ranges[j].bus && end <
407 sc->ranges[j].bus + sc->ranges[j].size) {
408 start -= sc->ranges[j].bus;
409 start += sc->ranges[j].host;
410 end -= sc->ranges[j].bus;
411 end += sc->ranges[j].host;
415 if (j == sc->nranges && sc->nranges != 0) {
417 device_printf(bus, "Could not map resource "
418 "%#jx-%#jx\n", start, end);
424 return (bus_generic_alloc_resource(bus, child, type, rid, start, end,
429 simplebus_print_res(struct simplebus_devinfo *di)
436 rv += resource_list_print_type(&di->rl, "mem", SYS_RES_MEMORY, "%#jx");
437 rv += resource_list_print_type(&di->rl, "irq", SYS_RES_IRQ, "%jd");
442 simplebus_probe_nomatch(device_t bus, device_t child)
444 const char *name, *type, *compat;
449 compat = ofw_bus_get_compat(child);
452 name = ofw_bus_get_name(child);
453 type = ofw_bus_get_type(child);
455 device_printf(bus, "<%s>", name != NULL ? name : "unknown");
456 simplebus_print_res(device_get_ivars(child));
457 if (!ofw_bus_status_okay(child))
460 printf(" type %s", type);
461 printf(" compat %s (no driver attached)\n", compat);
465 simplebus_print_child(device_t bus, device_t child)
469 rv = bus_print_child_header(bus, child);
470 rv += simplebus_print_res(device_get_ivars(child));
471 if (!ofw_bus_status_okay(child))
472 rv += printf(" disabled");
473 rv += bus_print_child_footer(bus, child);