1 /*-
2 * Copyright (c) 1999, 2000 Matthew R. Green
3 * Copyright (c) 2001 Thomas Moestl <tmm@FreeBSD.org>
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
22 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
23 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
24 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
25 * 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 * from: NetBSD: ebus.c,v 1.26 2001/09/10 16:27:53 eeh Exp
30 */
31
32 #include <sys/cdefs.h>
33 __FBSDID("$FreeBSD$");
34
35 /*
36 * UltraSPARC 5 and beyond EBus support
37 */
38
39 #include <sys/param.h>
40 #include <sys/systm.h>
41 #include <sys/bus.h>
42 #include <sys/kernel.h>
43 #include <sys/malloc.h>
44 #include <sys/module.h>
45
46 #include <machine/bus.h>
47
48 #include <sys/rman.h>
49
50 #include <dev/ofw/ofw_bus.h>
51 #include <dev/ofw/openfirm.h>
52
53 #include <machine/ofw_bus.h>
54 #include <machine/resource.h>
55
56 #include <dev/pci/pcireg.h>
57 #include <dev/pci/pcivar.h>
58
59 #include <sparc64/pci/ofw_pci.h>
60
61 /*
62 * The register, ranges and interrupt map properties are identical to the ISA
63 * ones.
64 */
65 #include <sparc64/isa/ofw_isa.h>
66
67 struct ebus_devinfo {
68 char *edi_compat; /* PROM compatible */
69 char *edi_model; /* PROM model */
70 char *edi_name; /* PROM name */
71 char *edi_type; /* PROM device_type */
72 phandle_t edi_node; /* PROM node */
73
74 struct resource_list edi_rl;
75 };
76
77 struct ebus_rinfo {
78 int eri_rtype;
79 struct rman eri_rman;
80 struct resource *eri_res;
81 };
82
83 struct ebus_softc {
84 struct isa_ranges *sc_range;
85 struct ebus_rinfo *sc_rinfo;
86
87 int sc_nrange;
88 int sc_nimap;
89
90 struct ofw_bus_iinfo sc_iinfo;
91 };
92
93 static device_probe_t ebus_probe;
94 static device_attach_t ebus_attach;
95 static bus_print_child_t ebus_print_child;
96 static bus_probe_nomatch_t ebus_probe_nomatch;
97 static bus_alloc_resource_t ebus_alloc_resource;
98 static bus_release_resource_t ebus_release_resource;
99 static bus_get_resource_list_t ebus_get_resource_list;
100 static ofw_bus_get_compat_t ebus_get_compat;
101 static ofw_bus_get_model_t ebus_get_model;
102 static ofw_bus_get_name_t ebus_get_name;
103 static ofw_bus_get_node_t ebus_get_node;
104 static ofw_bus_get_type_t ebus_get_type;
105
106 static struct ebus_devinfo *ebus_setup_dinfo(device_t, struct ebus_softc *,
107 phandle_t, char *);
108 static void ebus_destroy_dinfo(struct ebus_devinfo *);
109 static int ebus_print_res(struct ebus_devinfo *);
110
111 static device_method_t ebus_methods[] = {
112 /* Device interface */
113 DEVMETHOD(device_probe, ebus_probe),
114 DEVMETHOD(device_attach, ebus_attach),
115 DEVMETHOD(device_shutdown, bus_generic_shutdown),
116 DEVMETHOD(device_suspend, bus_generic_suspend),
117 DEVMETHOD(device_resume, bus_generic_resume),
118
119 /* Bus interface */
120 DEVMETHOD(bus_print_child, ebus_print_child),
121 DEVMETHOD(bus_probe_nomatch, ebus_probe_nomatch),
122 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
123 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
124 DEVMETHOD(bus_alloc_resource, ebus_alloc_resource),
125 DEVMETHOD(bus_get_resource_list, ebus_get_resource_list),
126 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
127 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
128 DEVMETHOD(bus_release_resource, ebus_release_resource),
129 DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource),
130
131 /* ofw_bus interface */
132 DEVMETHOD(ofw_bus_get_compat, ebus_get_compat),
133 DEVMETHOD(ofw_bus_get_model, ebus_get_model),
134 DEVMETHOD(ofw_bus_get_name, ebus_get_name),
135 DEVMETHOD(ofw_bus_get_node, ebus_get_node),
136 DEVMETHOD(ofw_bus_get_type, ebus_get_type),
137
138 { 0, 0 }
139 };
140
141 static driver_t ebus_driver = {
142 "ebus",
143 ebus_methods,
144 sizeof(struct ebus_softc),
145 };
146
147 static devclass_t ebus_devclass;
148
149 DRIVER_MODULE(ebus, pci, ebus_driver, ebus_devclass, 0, 0);
150 MODULE_DEPEND(ebus, pci, 1, 1, 1);
151 MODULE_VERSION(ebus, 1);
152
153 static int
154 ebus_probe(device_t dev)
155 {
156
157 if (pci_get_class(dev) != PCIC_BRIDGE ||
158 pci_get_vendor(dev) != 0x108e ||
159 strcmp(ofw_bus_get_name(dev), "ebus") != 0)
160 return (ENXIO);
161
162 if (pci_get_device(dev) == 0x1000)
163 device_set_desc(dev, "PCI-EBus2 bridge");
164 else if (pci_get_device(dev) == 0x1100)
165 device_set_desc(dev, "PCI-EBus3 bridge");
166 else
167 return (ENXIO);
168 return (0);
169 }
170
171 static int
172 ebus_attach(device_t dev)
173 {
174 struct ebus_softc *sc;
175 struct ebus_devinfo *edi;
176 struct ebus_rinfo *eri;
177 struct resource *res;
178 device_t cdev;
179 phandle_t node;
180 char *cname;
181 int i, rnum, rid;
182
183 sc = device_get_softc(dev);
184
185 node = ofw_bus_get_node(dev);
186 sc->sc_nrange = OF_getprop_alloc(node, "ranges",
187 sizeof(*sc->sc_range), (void **)&sc->sc_range);
188 if (sc->sc_nrange == -1) {
189 printf("ebus_attach: could not get ranges property\n");
190 return (ENXIO);
191 }
192
193 sc->sc_rinfo = malloc(sizeof(*sc->sc_rinfo) * sc->sc_nrange, M_DEVBUF,
194 M_WAITOK | M_ZERO);
195
196 /* For every range, there must be a matching resource. */
197 for (rnum = 0; rnum < sc->sc_nrange; rnum++) {
198 eri = &sc->sc_rinfo[rnum];
199 eri->eri_rtype = ofw_isa_range_restype(&sc->sc_range[rnum]);
200 rid = PCIR_BAR(rnum);
201 res = bus_alloc_resource_any(dev, eri->eri_rtype, &rid,
202 RF_ACTIVE);
203 if (res == NULL) {
204 printf("ebus_attach: failed to allocate range "
205 "resource!\n");
206 goto fail;
207 }
208 eri->eri_res = res;
209 eri->eri_rman.rm_type = RMAN_ARRAY;
210 eri->eri_rman.rm_descr = "EBus range";
211 if (rman_init(&eri->eri_rman) != 0) {
212 printf("ebus_attach: failed to initialize rman!");
213 goto fail;
214 }
215 if (rman_manage_region(&eri->eri_rman, rman_get_start(res),
216 rman_get_end(res)) != 0) {
217 printf("ebus_attach: failed to register region!");
218 rman_fini(&eri->eri_rman);
219 goto fail;
220 }
221 }
222
223 ofw_bus_setup_iinfo(node, &sc->sc_iinfo, sizeof(ofw_isa_intr_t));
224
225 /*
226 * Now attach our children.
227 */
228 for (node = OF_child(node); node > 0; node = OF_peer(node)) {
229 if ((OF_getprop_alloc(node, "name", 1, (void **)&cname)) == -1)
230 continue;
231
232 if ((edi = ebus_setup_dinfo(dev, sc, node, cname)) == NULL) {
233 device_printf(dev, "<%s>: incomplete\n", cname);
234 free(cname, M_OFWPROP);
235 continue;
236 }
237 if ((cdev = device_add_child(dev, NULL, -1)) == NULL)
238 panic("ebus_attach: device_add_child failed");
239 device_set_ivars(cdev, edi);
240 }
241 return (bus_generic_attach(dev));
242
243 fail:
244 for (i = rnum; i >= 0; i--) {
245 eri = &sc->sc_rinfo[i];
246 if (i < rnum)
247 rman_fini(&eri->eri_rman);
248 if (eri->eri_res != 0) {
249 bus_release_resource(dev, eri->eri_rtype,
250 PCIR_BAR(rnum), eri->eri_res);
251 }
252 }
253 free(sc->sc_range, M_OFWPROP);
254 return (ENXIO);
255 }
256
257 static int
258 ebus_print_child(device_t dev, device_t child)
259 {
260 struct ebus_devinfo *edi;
261 int retval;
262
263 edi = device_get_ivars(child);
264 retval = bus_print_child_header(dev, child);
265 retval += ebus_print_res(edi);
266 retval += bus_print_child_footer(dev, child);
267 return (retval);
268 }
269
270 static void
271 ebus_probe_nomatch(device_t dev, device_t child)
272 {
273 struct ebus_devinfo *edi;
274
275 edi = device_get_ivars(child);
276 device_printf(dev, "<%s>", edi->edi_name);
277 ebus_print_res(edi);
278 printf(" (no driver attached)\n");
279 }
280
281 static struct resource *
282 ebus_alloc_resource(device_t bus, device_t child, int type, int *rid,
283 u_long start, u_long end, u_long count, u_int flags)
284 {
285 struct ebus_softc *sc;
286 struct resource_list *rl;
287 struct resource_list_entry *rle = NULL;
288 struct resource *res;
289 struct ebus_rinfo *ri;
290 bus_space_tag_t bt;
291 bus_space_handle_t bh;
292 int passthrough = (device_get_parent(child) != bus);
293 int isdefault = (start == 0UL && end == ~0UL);
294 int ridx, rv;
295
296 sc = (struct ebus_softc *)device_get_softc(bus);
297 rl = BUS_GET_RESOURCE_LIST(bus, child);
298 /*
299 * Map EBus ranges to PCI ranges. This may include changing the
300 * allocation type.
301 */
302 switch (type) {
303 case SYS_RES_MEMORY:
304 KASSERT(!(isdefault && passthrough),
305 ("ebus_alloc_resource: passthrough of default alloc"));
306 if (!passthrough) {
307 rle = resource_list_find(rl, type, *rid);
308 if (rle == NULL)
309 return (NULL);
310 KASSERT(rle->res == NULL,
311 ("ebus_alloc_resource: resource entry is busy"));
312 if (isdefault) {
313 start = rle->start;
314 count = ulmax(count, rle->count);
315 end = ulmax(rle->end, start + count - 1);
316 }
317 }
318
319 (void)ofw_isa_range_map(sc->sc_range, sc->sc_nrange,
320 &start, &end, &ridx);
321
322 ri = &sc->sc_rinfo[ridx];
323 res = rman_reserve_resource(&ri->eri_rman, start, end, count,
324 flags, child);
325 if (res == NULL)
326 return (NULL);
327 rman_set_rid(res, *rid);
328 bt = rman_get_bustag(ri->eri_res);
329 rman_set_bustag(res, bt);
330 rv = bus_space_subregion(bt, rman_get_bushandle(ri->eri_res),
331 rman_get_start(res) - rman_get_start(ri->eri_res), count,
332 &bh);
333 if (rv != 0) {
334 rman_release_resource(res);
335 return (NULL);
336 }
337 rman_set_bushandle(res, bh);
338 if (!passthrough)
339 rle->res = res;
340 return (res);
341 case SYS_RES_IRQ:
342 return (resource_list_alloc(rl, bus, child, type, rid, start,
343 end, count, flags));
344 }
345 return (NULL);
346 }
347
348 static int
349 ebus_release_resource(device_t bus, device_t child, int type, int rid,
350 struct resource *res)
351 {
352 struct resource_list *rl;
353 struct resource_list_entry *rle;
354 int passthrough = (device_get_parent(child) != bus);
355 int rv;
356
357 rl = BUS_GET_RESOURCE_LIST(bus, child);
358 switch (type) {
359 case SYS_RES_MEMORY:
360 if ((rv = rman_release_resource(res)) != 0)
361 return (rv);
362 if (!passthrough) {
363 rle = resource_list_find(rl, type, rid);
364 KASSERT(rle != NULL, ("ebus_release_resource: "
365 "resource entry not found!"));
366 KASSERT(rle->res != NULL, ("ebus_alloc_resource: "
367 "resource entry is not busy"));
368 rle->res = NULL;
369 }
370 break;
371 case SYS_RES_IRQ:
372 return (resource_list_release(rl, bus, child, type, rid, res));
373 default:
374 panic("ebus_release_resource: unsupported resource type %d",
375 type);
376 }
377 return (0);
378 }
379
380 static struct resource_list *
381 ebus_get_resource_list(device_t dev, device_t child)
382 {
383 struct ebus_devinfo *edi;
384
385 edi = device_get_ivars(child);
386 return (&edi->edi_rl);
387 }
388
389 static struct ebus_devinfo *
390 ebus_setup_dinfo(device_t dev, struct ebus_softc *sc, phandle_t node,
391 char *name)
392 {
393 struct ebus_devinfo *edi;
394 struct isa_regs *reg;
395 ofw_isa_intr_t *intrs;
396 ofw_pci_intr_t rintr;
397 u_int64_t start;
398 int nreg, nintr, i;
399
400 edi = malloc(sizeof(*edi), M_DEVBUF, M_ZERO | M_WAITOK);
401 if (edi == NULL)
402 return (NULL);
403 resource_list_init(&edi->edi_rl);
404 edi->edi_name = name;
405 edi->edi_node = node;
406
407 OF_getprop_alloc(node, "compatible", 1, (void **)&edi->edi_compat);
408 OF_getprop_alloc(node, "device_type", 1, (void **)&edi->edi_type);
409 OF_getprop_alloc(node, "model", 1, (void **)&edi->edi_model);
410 nreg = OF_getprop_alloc(node, "reg", sizeof(*reg), (void **)®);
411 if (nreg == -1) {
412 ebus_destroy_dinfo(edi);
413 return (NULL);
414 }
415 for (i = 0; i < nreg; i++) {
416 start = ISA_REG_PHYS(reg + i);
417 resource_list_add(&edi->edi_rl, SYS_RES_MEMORY, i,
418 start, start + reg[i].size - 1, reg[i].size);
419 }
420 free(reg, M_OFWPROP);
421
422 nintr = OF_getprop_alloc(node, "interrupts", sizeof(*intrs),
423 (void **)&intrs);
424 for (i = 0; i < nintr; i++) {
425 rintr = ofw_isa_route_intr(dev, node, &sc->sc_iinfo, intrs[i]);
426 if (rintr == PCI_INVALID_IRQ)
427 panic("ebus_setup_dinfo: could not map ebus "
428 "interrupt %d", intrs[i]);
429 resource_list_add(&edi->edi_rl, SYS_RES_IRQ, i,
430 rintr, rintr, 1);
431 }
432 free(intrs, M_OFWPROP);
433
434 return (edi);
435 }
436
437 /*
438 * NOTE: This does not free the name member (it is needed afterwards in some
439 * cases).
440 */
441 static void
442 ebus_destroy_dinfo(struct ebus_devinfo *edi)
443 {
444
445 if (edi->edi_compat != NULL)
446 free(edi->edi_compat, M_OFWPROP);
447 if (edi->edi_type != NULL)
448 free(edi->edi_type, M_OFWPROP);
449 if (edi->edi_model != NULL)
450 free(edi->edi_model, M_OFWPROP);
451 resource_list_free(&edi->edi_rl);
452 free(edi, M_DEVBUF);
453 }
454
455 static int
456 ebus_print_res(struct ebus_devinfo *edi)
457 {
458 int retval;
459
460 retval = 0;
461 retval += resource_list_print_type(&edi->edi_rl, "addr", SYS_RES_MEMORY,
462 "%#lx");
463 retval += resource_list_print_type(&edi->edi_rl, "irq", SYS_RES_IRQ,
464 "%ld");
465 return (retval);
466 }
467
468 static const char *
469 ebus_get_compat(device_t bus, device_t dev)
470 {
471 struct ebus_devinfo *dinfo;
472
473 dinfo = device_get_ivars(dev);
474 return (dinfo->edi_compat);
475 }
476
477 static const char *
478 ebus_get_model(device_t bus, device_t dev)
479 {
480 struct ebus_devinfo *dinfo;
481
482 dinfo = device_get_ivars(dev);
483 return (dinfo->edi_model);
484 }
485
486 static const char *
487 ebus_get_name(device_t bus, device_t dev)
488 {
489 struct ebus_devinfo *dinfo;
490
491 dinfo = device_get_ivars(dev);
492 return (dinfo->edi_name);
493 }
494
495 static phandle_t
496 ebus_get_node(device_t bus, device_t dev)
497 {
498 struct ebus_devinfo *dinfo;
499
500 dinfo = device_get_ivars(dev);
501 return (dinfo->edi_node);
502 }
503
504 static const char *
505 ebus_get_type(device_t bus, device_t dev)
506 {
507 struct ebus_devinfo *dinfo;
508
509 dinfo = device_get_ivars(dev);
510 return (dinfo->edi_type);
511 }
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