2 * Copyright (c) 2015 The FreeBSD Foundation
5 * This software was developed by Semihalf under
6 * the sponsorship of the FreeBSD Foundation.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
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.
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
30 #include <sys/cdefs.h>
31 __FBSDID("$FreeBSD$");
33 #include <sys/param.h>
34 #include <sys/systm.h>
35 #include <sys/bitstring.h>
37 #include <sys/kernel.h>
38 #include <sys/module.h>
41 #include <machine/resource.h>
43 #include <dev/ofw/openfirm.h>
44 #include <dev/ofw/ofw_bus.h>
45 #include <dev/ofw/ofw_bus_subr.h>
49 #include "gic_v3_reg.h"
50 #include "gic_v3_var.h"
55 static int gic_v3_fdt_probe(device_t);
56 static int gic_v3_fdt_attach(device_t);
58 static struct resource *gic_v3_ofw_bus_alloc_res(device_t, device_t, int, int *,
59 rman_res_t, rman_res_t, rman_res_t, u_int);
60 static const struct ofw_bus_devinfo *gic_v3_ofw_get_devinfo(device_t, device_t);
62 static device_method_t gic_v3_fdt_methods[] = {
63 /* Device interface */
64 DEVMETHOD(device_probe, gic_v3_fdt_probe),
65 DEVMETHOD(device_attach, gic_v3_fdt_attach),
68 DEVMETHOD(bus_alloc_resource, gic_v3_ofw_bus_alloc_res),
69 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
71 /* ofw_bus interface */
72 DEVMETHOD(ofw_bus_get_devinfo, gic_v3_ofw_get_devinfo),
73 DEVMETHOD(ofw_bus_get_compat, ofw_bus_gen_get_compat),
74 DEVMETHOD(ofw_bus_get_model, ofw_bus_gen_get_model),
75 DEVMETHOD(ofw_bus_get_name, ofw_bus_gen_get_name),
76 DEVMETHOD(ofw_bus_get_node, ofw_bus_gen_get_node),
77 DEVMETHOD(ofw_bus_get_type, ofw_bus_gen_get_type),
83 DEFINE_CLASS_1(gic, gic_v3_fdt_driver, gic_v3_fdt_methods,
84 sizeof(struct gic_v3_softc), gic_v3_driver);
86 static devclass_t gic_v3_fdt_devclass;
88 EARLY_DRIVER_MODULE(gic_v3, simplebus, gic_v3_fdt_driver, gic_v3_fdt_devclass,
89 0, 0, BUS_PASS_INTERRUPT + BUS_PASS_ORDER_MIDDLE);
90 EARLY_DRIVER_MODULE(gic_v3, ofwbus, gic_v3_fdt_driver, gic_v3_fdt_devclass,
91 0, 0, BUS_PASS_INTERRUPT + BUS_PASS_ORDER_MIDDLE);
94 * Helper functions declarations.
96 static int gic_v3_ofw_bus_attach(device_t);
102 gic_v3_fdt_probe(device_t dev)
105 if (!ofw_bus_status_okay(dev))
108 if (!ofw_bus_is_compatible(dev, "arm,gic-v3"))
111 device_set_desc(dev, GIC_V3_DEVSTR);
112 return (BUS_PROBE_DEFAULT);
116 gic_v3_fdt_attach(device_t dev)
118 struct gic_v3_softc *sc;
119 pcell_t redist_regions;
122 sc = device_get_softc(dev);
126 * Recover number of the Re-Distributor regions.
128 if (OF_getencprop(ofw_bus_get_node(dev), "#redistributor-regions",
129 &redist_regions, sizeof(redist_regions)) <= 0)
130 sc->gic_redists.nregions = 1;
132 sc->gic_redists.nregions = redist_regions;
134 err = gic_v3_attach(dev);
138 * Try to register ITS to this GIC.
139 * GIC will act as a bus in that case.
140 * Failure here will not affect main GIC functionality.
142 if (gic_v3_ofw_bus_attach(dev) != 0) {
145 "Failed to attach ITS to this GIC\n");
154 "Failed to attach. Error %d\n", err);
156 /* Failure so free resources */
162 /* OFW bus interface */
163 struct gic_v3_ofw_devinfo {
164 struct ofw_bus_devinfo di_dinfo;
165 struct resource_list di_rl;
168 static const struct ofw_bus_devinfo *
169 gic_v3_ofw_get_devinfo(device_t bus __unused, device_t child)
171 struct gic_v3_ofw_devinfo *di;
173 di = device_get_ivars(child);
174 return (&di->di_dinfo);
177 static struct resource *
178 gic_v3_ofw_bus_alloc_res(device_t bus, device_t child, int type, int *rid,
179 rman_res_t start, rman_res_t end, rman_res_t count, u_int flags)
181 struct gic_v3_ofw_devinfo *di;
182 struct resource_list_entry *rle;
185 if (RMAN_IS_DEFAULT_RANGE(start, end)) {
186 if ((di = device_get_ivars(child)) == NULL)
188 if (type != SYS_RES_MEMORY)
191 /* Find defaults for this rid */
192 rle = resource_list_find(&di->di_rl, type, *rid);
201 * XXX: No ranges remap!
202 * Absolute address is expected.
204 if (ofw_bus_has_prop(bus, "ranges")) {
205 ranges_len = OF_getproplen(ofw_bus_get_node(bus), "ranges");
206 if (ranges_len != 0) {
209 "Ranges remap not supported\n");
214 return (bus_generic_alloc_resource(bus, child, type, rid, start, end,
218 /* Helper functions */
221 * Bus capability support for GICv3.
222 * Collects and configures device informations and finally
223 * adds ITS device as a child of GICv3 in Newbus hierarchy.
226 gic_v3_ofw_bus_attach(device_t dev)
228 struct gic_v3_ofw_devinfo *di;
230 phandle_t parent, node;
231 pcell_t addr_cells, size_cells;
233 parent = ofw_bus_get_node(dev);
236 OF_getencprop(parent, "#address-cells", &addr_cells,
239 OF_getencprop(parent, "#size-cells", &size_cells,
241 /* Iterate through all GIC subordinates */
242 for (node = OF_child(parent); node > 0; node = OF_peer(node)) {
243 /* Allocate and populate devinfo. */
244 di = malloc(sizeof(*di), M_GIC_V3, M_WAITOK | M_ZERO);
245 if (ofw_bus_gen_setup_devinfo(&di->di_dinfo, node)) {
248 "Could not set up devinfo for ITS\n");
254 /* Initialize and populate resource list. */
255 resource_list_init(&di->di_rl);
256 ofw_bus_reg_to_rl(dev, node, addr_cells, size_cells,
259 /* Should not have any interrupts, so don't add any */
261 /* Add newbus device for this FDT node */
262 child = device_add_child(dev, NULL, -1);
266 "Could not add child: %s\n",
267 di->di_dinfo.obd_name);
269 resource_list_free(&di->di_rl);
270 ofw_bus_gen_destroy_devinfo(&di->di_dinfo);
275 device_set_ivars(child, di);
279 return (bus_generic_attach(dev));
282 static int gic_v3_its_fdt_probe(device_t dev);
284 static device_method_t gic_v3_its_fdt_methods[] = {
285 /* Device interface */
286 DEVMETHOD(device_probe, gic_v3_its_fdt_probe),
292 DEFINE_CLASS_1(its, gic_v3_its_fdt_driver, gic_v3_its_fdt_methods,
293 sizeof(struct gic_v3_its_softc), gic_v3_its_driver);
295 static devclass_t gic_v3_its_fdt_devclass;
297 EARLY_DRIVER_MODULE(its, gic, gic_v3_its_fdt_driver,
298 gic_v3_its_fdt_devclass, 0, 0, BUS_PASS_INTERRUPT + BUS_PASS_ORDER_MIDDLE);
301 gic_v3_its_fdt_probe(device_t dev)
304 if (!ofw_bus_status_okay(dev))
307 if (!ofw_bus_is_compatible(dev, GIC_V3_ITS_COMPSTR))
310 device_set_desc(dev, GIC_V3_ITS_DEVSTR);
311 return (BUS_PROBE_DEFAULT);