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>
36 #include <sys/kernel.h>
37 #include <sys/module.h>
40 #include <machine/resource.h>
42 #include <dev/ofw/openfirm.h>
43 #include <dev/ofw/ofw_bus.h>
44 #include <dev/ofw/ofw_bus_subr.h>
48 #include "gic_v3_reg.h"
49 #include "gic_v3_var.h"
54 static int gic_v3_fdt_probe(device_t);
55 static int gic_v3_fdt_attach(device_t);
57 static struct resource *gic_v3_ofw_bus_alloc_res(device_t, device_t, int, int *,
58 rman_res_t, rman_res_t, rman_res_t, u_int);
59 static const struct ofw_bus_devinfo *gic_v3_ofw_get_devinfo(device_t, device_t);
61 static device_method_t gic_v3_fdt_methods[] = {
62 /* Device interface */
63 DEVMETHOD(device_probe, gic_v3_fdt_probe),
64 DEVMETHOD(device_attach, gic_v3_fdt_attach),
67 DEVMETHOD(bus_alloc_resource, gic_v3_ofw_bus_alloc_res),
68 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
70 /* ofw_bus interface */
71 DEVMETHOD(ofw_bus_get_devinfo, gic_v3_ofw_get_devinfo),
72 DEVMETHOD(ofw_bus_get_compat, ofw_bus_gen_get_compat),
73 DEVMETHOD(ofw_bus_get_model, ofw_bus_gen_get_model),
74 DEVMETHOD(ofw_bus_get_name, ofw_bus_gen_get_name),
75 DEVMETHOD(ofw_bus_get_node, ofw_bus_gen_get_node),
76 DEVMETHOD(ofw_bus_get_type, ofw_bus_gen_get_type),
82 DEFINE_CLASS_1(gic, gic_v3_fdt_driver, gic_v3_fdt_methods,
83 sizeof(struct gic_v3_softc), gic_v3_driver);
85 static devclass_t gic_v3_fdt_devclass;
87 EARLY_DRIVER_MODULE(gic_v3, simplebus, gic_v3_fdt_driver, gic_v3_fdt_devclass,
88 0, 0, BUS_PASS_INTERRUPT + BUS_PASS_ORDER_MIDDLE);
89 EARLY_DRIVER_MODULE(gic_v3, ofwbus, gic_v3_fdt_driver, gic_v3_fdt_devclass,
90 0, 0, BUS_PASS_INTERRUPT + BUS_PASS_ORDER_MIDDLE);
93 * Helper functions declarations.
95 static int gic_v3_ofw_bus_attach(device_t);
101 gic_v3_fdt_probe(device_t dev)
104 if (!ofw_bus_status_okay(dev))
107 if (!ofw_bus_is_compatible(dev, "arm,gic-v3"))
110 device_set_desc(dev, GIC_V3_DEVSTR);
111 return (BUS_PROBE_DEFAULT);
115 gic_v3_fdt_attach(device_t dev)
117 struct gic_v3_softc *sc;
118 pcell_t redist_regions;
121 sc = device_get_softc(dev);
125 * Recover number of the Re-Distributor regions.
127 if (OF_getencprop(ofw_bus_get_node(dev), "#redistributor-regions",
128 &redist_regions, sizeof(redist_regions)) <= 0)
129 sc->gic_redists.nregions = 1;
131 sc->gic_redists.nregions = redist_regions;
133 err = gic_v3_attach(dev);
137 * Try to register ITS to this GIC.
138 * GIC will act as a bus in that case.
139 * Failure here will not affect main GIC functionality.
141 if (gic_v3_ofw_bus_attach(dev) != 0) {
144 "Failed to attach ITS to this GIC\n");
153 "Failed to attach. Error %d\n", err);
155 /* Failure so free resources */
161 /* OFW bus interface */
162 struct gic_v3_ofw_devinfo {
163 struct ofw_bus_devinfo di_dinfo;
164 struct resource_list di_rl;
167 static const struct ofw_bus_devinfo *
168 gic_v3_ofw_get_devinfo(device_t bus __unused, device_t child)
170 struct gic_v3_ofw_devinfo *di;
172 di = device_get_ivars(child);
173 return (&di->di_dinfo);
176 static struct resource *
177 gic_v3_ofw_bus_alloc_res(device_t bus, device_t child, int type, int *rid,
178 rman_res_t start, rman_res_t end, rman_res_t count, u_int flags)
180 struct gic_v3_ofw_devinfo *di;
181 struct resource_list_entry *rle;
184 if (RMAN_IS_DEFAULT_RANGE(start, end)) {
185 if ((di = device_get_ivars(child)) == NULL)
187 if (type != SYS_RES_MEMORY)
190 /* Find defaults for this rid */
191 rle = resource_list_find(&di->di_rl, type, *rid);
200 * XXX: No ranges remap!
201 * Absolute address is expected.
203 if (ofw_bus_has_prop(bus, "ranges")) {
204 ranges_len = OF_getproplen(ofw_bus_get_node(bus), "ranges");
205 if (ranges_len != 0) {
208 "Ranges remap not supported\n");
213 return (bus_generic_alloc_resource(bus, child, type, rid, start, end,
217 /* Helper functions */
220 * Bus capability support for GICv3.
221 * Collects and configures device informations and finally
222 * adds ITS device as a child of GICv3 in Newbus hierarchy.
225 gic_v3_ofw_bus_attach(device_t dev)
227 struct gic_v3_ofw_devinfo *di;
229 phandle_t parent, node;
230 pcell_t addr_cells, size_cells;
232 parent = ofw_bus_get_node(dev);
235 OF_getencprop(parent, "#address-cells", &addr_cells,
238 OF_getencprop(parent, "#size-cells", &size_cells,
240 /* Iterate through all GIC subordinates */
241 for (node = OF_child(parent); node > 0; node = OF_peer(node)) {
242 /* Allocate and populate devinfo. */
243 di = malloc(sizeof(*di), M_GIC_V3, M_WAITOK | M_ZERO);
244 if (ofw_bus_gen_setup_devinfo(&di->di_dinfo, node)) {
247 "Could not set up devinfo for ITS\n");
253 /* Initialize and populate resource list. */
254 resource_list_init(&di->di_rl);
255 ofw_bus_reg_to_rl(dev, node, addr_cells, size_cells,
258 /* Should not have any interrupts, so don't add any */
260 /* Add newbus device for this FDT node */
261 child = device_add_child(dev, NULL, -1);
265 "Could not add child: %s\n",
266 di->di_dinfo.obd_name);
268 resource_list_free(&di->di_rl);
269 ofw_bus_gen_destroy_devinfo(&di->di_dinfo);
274 device_set_ivars(child, di);
278 return (bus_generic_attach(dev));
281 static int gic_v3_its_fdt_probe(device_t dev);
283 static device_method_t gic_v3_its_fdt_methods[] = {
284 /* Device interface */
285 DEVMETHOD(device_probe, gic_v3_its_fdt_probe),
291 DEFINE_CLASS_1(its, gic_v3_its_fdt_driver, gic_v3_its_fdt_methods,
292 sizeof(struct gic_v3_its_softc), gic_v3_its_driver);
294 static devclass_t gic_v3_its_fdt_devclass;
296 EARLY_DRIVER_MODULE(its, gic, gic_v3_its_fdt_driver,
297 gic_v3_its_fdt_devclass, 0, 0, BUS_PASS_INTERRUPT + BUS_PASS_ORDER_MIDDLE);
300 gic_v3_its_fdt_probe(device_t dev)
303 if (!ofw_bus_status_okay(dev))
306 if (!ofw_bus_is_compatible(dev, GIC_V3_ITS_COMPSTR))
309 device_set_desc(dev, GIC_V3_ITS_DEVSTR);
310 return (BUS_PROBE_DEFAULT);