1 /*-
2 * Copyright (c) 2003 Jake Burkholder.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
29
30 #include <sys/param.h>
31 #include <sys/systm.h>
32 #include <sys/bus.h>
33 #include <sys/kernel.h>
34 #include <sys/malloc.h>
35 #include <sys/module.h>
36
37 #include <dev/ofw/ofw_bus.h>
38 #include <dev/ofw/ofw_bus_subr.h>
39 #include <dev/ofw/openfirm.h>
40
41 #include <machine/bus.h>
42 #include <machine/resource.h>
43
44 #include <sys/rman.h>
45
46 #include <sparc64/sbus/ofw_sbus.h>
47
48 struct central_devinfo {
49 struct ofw_bus_devinfo cdi_obdinfo;
50 struct resource_list cdi_rl;
51 };
52
53 struct central_softc {
54 int sc_nrange;
55 struct sbus_ranges *sc_ranges;
56 };
57
58 static device_probe_t central_probe;
59 static device_attach_t central_attach;
60 static bus_print_child_t central_print_child;
61 static bus_probe_nomatch_t central_probe_nomatch;
62 static bus_alloc_resource_t central_alloc_resource;
63 static bus_adjust_resource_t central_adjust_resource;
64 static bus_get_resource_list_t central_get_resource_list;
65 static ofw_bus_get_devinfo_t central_get_devinfo;
66
67 static int central_print_res(struct central_devinfo *);
68
69 static device_method_t central_methods[] = {
70 /* Device interface */
71 DEVMETHOD(device_probe, central_probe),
72 DEVMETHOD(device_attach, central_attach),
73 DEVMETHOD(device_shutdown, bus_generic_shutdown),
74 DEVMETHOD(device_suspend, bus_generic_suspend),
75 DEVMETHOD(device_resume, bus_generic_resume),
76
77 /* Bus interface */
78 DEVMETHOD(bus_print_child, central_print_child),
79 DEVMETHOD(bus_probe_nomatch, central_probe_nomatch),
80 DEVMETHOD(bus_alloc_resource, central_alloc_resource),
81 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
82 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
83 DEVMETHOD(bus_adjust_resource, central_adjust_resource),
84 DEVMETHOD(bus_release_resource, bus_generic_rl_release_resource),
85 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
86 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
87 DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource),
88 DEVMETHOD(bus_get_resource_list, central_get_resource_list),
89 DEVMETHOD(bus_child_pnpinfo_str, ofw_bus_gen_child_pnpinfo_str),
90
91 /* ofw_bus interface */
92 DEVMETHOD(ofw_bus_get_devinfo, central_get_devinfo),
93 DEVMETHOD(ofw_bus_get_compat, ofw_bus_gen_get_compat),
94 DEVMETHOD(ofw_bus_get_model, ofw_bus_gen_get_model),
95 DEVMETHOD(ofw_bus_get_name, ofw_bus_gen_get_name),
96 DEVMETHOD(ofw_bus_get_node, ofw_bus_gen_get_node),
97 DEVMETHOD(ofw_bus_get_type, ofw_bus_gen_get_type),
98
99 DEVMETHOD_END
100 };
101
102 static driver_t central_driver = {
103 "central",
104 central_methods,
105 sizeof(struct central_softc),
106 };
107
108 static devclass_t central_devclass;
109
110 EARLY_DRIVER_MODULE(central, nexus, central_driver, central_devclass, 0, 0,
111 BUS_PASS_BUS);
112 MODULE_DEPEND(fhc, nexus, 1, 1, 1);
113 MODULE_VERSION(central, 1);
114
115 static int
central_probe(device_t dev)116 central_probe(device_t dev)
117 {
118
119 if (strcmp(ofw_bus_get_name(dev), "central") == 0) {
120 device_set_desc(dev, "central");
121 return (0);
122 }
123 return (ENXIO);
124 }
125
126 static int
central_attach(device_t dev)127 central_attach(device_t dev)
128 {
129 struct central_devinfo *cdi;
130 struct sbus_regs *reg;
131 struct central_softc *sc;
132 phandle_t child;
133 phandle_t node;
134 device_t cdev;
135 int nreg;
136 int i;
137
138 sc = device_get_softc(dev);
139 node = ofw_bus_get_node(dev);
140
141 sc->sc_nrange = OF_getprop_alloc(node, "ranges",
142 sizeof(*sc->sc_ranges), (void **)&sc->sc_ranges);
143 if (sc->sc_nrange == -1) {
144 device_printf(dev, "can't get ranges\n");
145 return (ENXIO);
146 }
147
148 for (child = OF_child(node); child != 0; child = OF_peer(child)) {
149 cdi = malloc(sizeof(*cdi), M_DEVBUF, M_WAITOK | M_ZERO);
150 if (ofw_bus_gen_setup_devinfo(&cdi->cdi_obdinfo, child) != 0) {
151 free(cdi, M_DEVBUF);
152 continue;
153 }
154 nreg = OF_getprop_alloc(child, "reg", sizeof(*reg),
155 (void **)®);
156 if (nreg == -1) {
157 device_printf(dev, "<%s>: incomplete\n",
158 cdi->cdi_obdinfo.obd_name);
159 ofw_bus_gen_destroy_devinfo(&cdi->cdi_obdinfo);
160 free(cdi, M_DEVBUF);
161 continue;
162 }
163 resource_list_init(&cdi->cdi_rl);
164 for (i = 0; i < nreg; i++)
165 resource_list_add(&cdi->cdi_rl, SYS_RES_MEMORY, i,
166 reg[i].sbr_offset, reg[i].sbr_offset +
167 reg[i].sbr_size, reg[i].sbr_size);
168 free(reg, M_OFWPROP);
169 cdev = device_add_child(dev, NULL, -1);
170 if (cdev == NULL) {
171 device_printf(dev, "<%s>: device_add_child failed\n",
172 cdi->cdi_obdinfo.obd_name);
173 resource_list_free(&cdi->cdi_rl);
174 ofw_bus_gen_destroy_devinfo(&cdi->cdi_obdinfo);
175 free(cdi, M_DEVBUF);
176 continue;
177 }
178 device_set_ivars(cdev, cdi);
179 }
180
181 return (bus_generic_attach(dev));
182 }
183
184 static int
central_adjust_resource(device_t bus __unused,device_t child __unused,int type __unused,struct resource * r __unused,u_long start __unused,u_long end __unused)185 central_adjust_resource(device_t bus __unused, device_t child __unused,
186 int type __unused, struct resource *r __unused, u_long start __unused,
187 u_long end __unused)
188 {
189
190 return (ENXIO);
191 }
192
193 static int
central_print_child(device_t dev,device_t child)194 central_print_child(device_t dev, device_t child)
195 {
196 int rv;
197
198 rv = bus_print_child_header(dev, child);
199 rv += central_print_res(device_get_ivars(child));
200 rv += bus_print_child_footer(dev, child);
201 return (rv);
202 }
203
204 static void
central_probe_nomatch(device_t dev,device_t child)205 central_probe_nomatch(device_t dev, device_t child)
206 {
207 const char *type;
208
209 device_printf(dev, "<%s>", ofw_bus_get_name(child));
210 central_print_res(device_get_ivars(child));
211 type = ofw_bus_get_type(child);
212 printf(" type %s (no driver attached)\n",
213 type != NULL ? type : "unknown");
214 }
215
216 static struct resource *
central_alloc_resource(device_t bus,device_t child,int type,int * rid,u_long start,u_long end,u_long count,u_int flags)217 central_alloc_resource(device_t bus, device_t child, int type, int *rid,
218 u_long start, u_long end, u_long count, u_int flags)
219 {
220 struct resource_list *rl;
221 struct resource_list_entry *rle;
222 struct central_softc *sc;
223 struct resource *res;
224 bus_addr_t coffset;
225 bus_addr_t cend;
226 bus_addr_t phys;
227 int isdefault;
228 int passthrough;
229 int i;
230
231 isdefault = (start == 0UL && end == ~0UL);
232 passthrough = (device_get_parent(child) != bus);
233 res = NULL;
234 rle = NULL;
235 rl = BUS_GET_RESOURCE_LIST(bus, child);
236 sc = device_get_softc(bus);
237 switch (type) {
238 case SYS_RES_IRQ:
239 return (resource_list_alloc(rl, bus, child, type, rid, start,
240 end, count, flags));
241 case SYS_RES_MEMORY:
242 if (!passthrough) {
243 rle = resource_list_find(rl, type, *rid);
244 if (rle == NULL)
245 return (NULL);
246 if (rle->res != NULL)
247 panic("%s: resource entry is busy", __func__);
248 if (isdefault) {
249 start = rle->start;
250 count = ulmax(count, rle->count);
251 end = ulmax(rle->end, start + count - 1);
252 }
253 }
254 for (i = 0; i < sc->sc_nrange; i++) {
255 coffset = sc->sc_ranges[i].coffset;
256 cend = coffset + sc->sc_ranges[i].size - 1;
257 if (start >= coffset && end <= cend) {
258 start -= coffset;
259 end -= coffset;
260 phys = sc->sc_ranges[i].poffset |
261 ((bus_addr_t)sc->sc_ranges[i].pspace << 32);
262 res = bus_generic_alloc_resource(bus, child,
263 type, rid, phys + start, phys + end,
264 count, flags);
265 if (!passthrough)
266 rle->res = res;
267 break;
268 }
269 }
270 break;
271 }
272 return (res);
273 }
274
275 static struct resource_list *
central_get_resource_list(device_t bus,device_t child)276 central_get_resource_list(device_t bus, device_t child)
277 {
278 struct central_devinfo *cdi;
279
280 cdi = device_get_ivars(child);
281 return (&cdi->cdi_rl);
282 }
283
284 static const struct ofw_bus_devinfo *
central_get_devinfo(device_t bus,device_t child)285 central_get_devinfo(device_t bus, device_t child)
286 {
287 struct central_devinfo *cdi;
288
289 cdi = device_get_ivars(child);
290 return (&cdi->cdi_obdinfo);
291 }
292
293 static int
central_print_res(struct central_devinfo * cdi)294 central_print_res(struct central_devinfo *cdi)
295 {
296
297 return (resource_list_print_type(&cdi->cdi_rl, "mem", SYS_RES_MEMORY,
298 "%#lx"));
299 }
300