central.c revision 143824 
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: head/sys/sparc64/central/central.c 143824 2005-03-19 00:47:02Z marius $");
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/openfirm.h>
39
40#include <machine/bus.h>
41#include <machine/nexusvar.h>
42#include <machine/ofw_upa.h>
43#include <machine/resource.h>
44
45#include <sys/rman.h>
46
47#include <sparc64/sbus/ofw_sbus.h>
48
49struct central_devinfo {
50	char			*cdi_compat;
51	char			*cdi_model;
52	char			*cdi_name;
53	char			*cdi_type;
54	phandle_t		cdi_node;
55	struct resource_list	cdi_rl;
56};
57
58struct central_softc {
59	phandle_t		sc_node;
60	int			sc_nrange;
61	struct sbus_ranges	*sc_ranges;
62};
63
64static device_probe_t central_probe;
65static device_attach_t central_attach;
66static bus_print_child_t central_print_child;
67static bus_probe_nomatch_t central_probe_nomatch;
68static bus_alloc_resource_t central_alloc_resource;
69static bus_get_resource_list_t central_get_resource_list;
70static ofw_bus_get_compat_t central_get_compat;
71static ofw_bus_get_model_t central_get_model;
72static ofw_bus_get_name_t central_get_name;
73static ofw_bus_get_node_t central_get_node;
74static ofw_bus_get_type_t central_get_type;
75
76static device_method_t central_methods[] = {
77	/* Device interface. */
78	DEVMETHOD(device_probe,		central_probe),
79	DEVMETHOD(device_attach,	central_attach),
80
81	/* Bus interface. */
82	DEVMETHOD(bus_print_child,	central_print_child),
83	DEVMETHOD(bus_probe_nomatch,	central_probe_nomatch),
84	DEVMETHOD(bus_setup_intr,	bus_generic_setup_intr),
85	DEVMETHOD(bus_teardown_intr,	bus_generic_teardown_intr),
86	DEVMETHOD(bus_alloc_resource,	central_alloc_resource),
87	DEVMETHOD(bus_release_resource,	bus_generic_rl_release_resource),
88	DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
89	DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
90	DEVMETHOD(bus_get_resource_list, central_get_resource_list),
91
92	/* ofw_bus interface */
93	DEVMETHOD(ofw_bus_get_compat,	central_get_compat),
94	DEVMETHOD(ofw_bus_get_model,	central_get_model),
95	DEVMETHOD(ofw_bus_get_name,	central_get_name),
96	DEVMETHOD(ofw_bus_get_node,	central_get_node),
97	DEVMETHOD(ofw_bus_get_type,	central_get_type),
98
99	{ NULL, NULL }
100};
101
102static driver_t central_driver = {
103	"central",
104	central_methods,
105	sizeof(struct central_softc),
106};
107
108static devclass_t central_devclass;
109
110DRIVER_MODULE(central, nexus, central_driver, central_devclass, 0, 0);
111
112static int
113central_probe(device_t dev)
114{
115
116	if (strcmp(nexus_get_name(dev), "central") == 0) {
117		device_set_desc(dev, "central");
118		return (0);
119	}
120	return (ENXIO);
121}
122
123static int
124central_attach(device_t dev)
125{
126	struct central_devinfo *cdi;
127	struct sbus_regs *reg;
128	struct central_softc *sc;
129	phandle_t child;
130	phandle_t node;
131	bus_addr_t size;
132	bus_addr_t off;
133	device_t cdev;
134	char *name;
135	int nreg;
136	int i;
137
138	sc = device_get_softc(dev);
139	node = nexus_get_node(dev);
140	sc->sc_node = node;
141
142	sc->sc_nrange = OF_getprop_alloc(node, "ranges",
143	    sizeof(*sc->sc_ranges), (void **)&sc->sc_ranges);
144	if (sc->sc_nrange == -1) {
145		device_printf(dev, "can't get ranges\n");
146		return (ENXIO);
147	}
148
149	for (child = OF_child(node); child != 0; child = OF_peer(child)) {
150		if ((OF_getprop_alloc(child, "name", 1, (void **)&name)) == -1)
151			continue;
152		cdev = device_add_child(dev, NULL, -1);
153		if (cdev != NULL) {
154			cdi = malloc(sizeof(*cdi), M_DEVBUF, M_WAITOK | M_ZERO);
155			if (cdi == NULL)
156				continue;
157			cdi->cdi_name = name;
158			cdi->cdi_node = child;
159			OF_getprop_alloc(child, "compatible", 1,
160			    (void **)&cdi->cdi_compat);
161			OF_getprop_alloc(child, "device_type", 1,
162			    (void **)&cdi->cdi_type);
163			OF_getprop_alloc(child, "model", 1,
164			    (void **)&cdi->cdi_model);
165			resource_list_init(&cdi->cdi_rl);
166			nreg = OF_getprop_alloc(child, "reg", sizeof(*reg),
167			    (void **)&reg);
168			if (nreg != -1) {
169				for (i = 0; i < nreg; i++) {
170					off = reg[i].sbr_offset;
171					size = reg[i].sbr_size;
172					resource_list_add(&cdi->cdi_rl,
173					    SYS_RES_MEMORY, i, off, off + size,
174					    size);
175				}
176				free(reg, M_OFWPROP);
177			}
178			device_set_ivars(cdev, cdi);
179		} else
180			free(name, M_OFWPROP);
181	}
182
183	return (bus_generic_attach(dev));
184}
185
186static int
187central_print_child(device_t dev, device_t child)
188{
189	struct central_devinfo *cdi;
190	int rv;
191
192	cdi = device_get_ivars(child);
193	rv = bus_print_child_header(dev, child);
194	rv += resource_list_print_type(&cdi->cdi_rl, "mem",
195	    SYS_RES_MEMORY, "%#lx");
196	rv += bus_print_child_footer(dev, child);
197	return (rv);
198}
199
200static void
201central_probe_nomatch(device_t dev, device_t child)
202{
203	struct central_devinfo *cdi;
204
205	cdi = device_get_ivars(child);
206	device_printf(dev, "<%s>", cdi->cdi_name);
207	resource_list_print_type(&cdi->cdi_rl, "mem", SYS_RES_MEMORY, "%#lx");
208	printf(" type %s (no driver attached)\n",
209	    cdi->cdi_type != NULL ? cdi->cdi_type : "unknown");
210}
211
212static struct resource *
213central_alloc_resource(device_t bus, device_t child, int type, int *rid,
214    u_long start, u_long end, u_long count, u_int flags)
215{
216	struct resource_list *rl;
217	struct resource_list_entry *rle;
218	struct central_softc *sc;
219	struct resource *res;
220	bus_addr_t coffset;
221	bus_addr_t cend;
222	bus_addr_t phys;
223	int isdefault;
224	int passthrough;
225	int i;
226
227	isdefault = (start == 0UL && end == ~0UL);
228	passthrough = (device_get_parent(child) != bus);
229	res = NULL;
230	rle = NULL;
231	rl = BUS_GET_RESOURCE_LIST(bus, child);
232	sc = device_get_softc(bus);
233	switch (type) {
234	case SYS_RES_IRQ:
235		return (resource_list_alloc(rl, bus, child, type, rid, start,
236		    end, count, flags));
237		break;
238	case SYS_RES_MEMORY:
239		if (!passthrough) {
240			rle = resource_list_find(rl, type, *rid);
241			if (rle == NULL)
242				return (NULL);
243			if (rle->res != NULL)
244				panic("%s: resource entry is busy", __func__);
245			if (isdefault) {
246				start = rle->start;
247				count = ulmax(count, rle->count);
248				end = ulmax(rle->end, start + count - 1);
249			}
250		}
251		for (i = 0; i < sc->sc_nrange; i++) {
252			coffset = sc->sc_ranges[i].coffset;
253			cend = coffset + sc->sc_ranges[i].size - 1;
254			if (start >= coffset && end <= cend) {
255				start -= coffset;
256				end -= coffset;
257				phys = sc->sc_ranges[i].poffset |
258				    ((bus_addr_t)sc->sc_ranges[i].pspace << 32);
259				res = bus_generic_alloc_resource(bus, child,
260				    type, rid, phys + start, phys + end,
261				    count, flags);
262				if (!passthrough)
263					rle->res = res;
264				break;
265			}
266		}
267		break;
268	default:
269		break;
270	}
271	return (res);
272}
273
274static struct resource_list *
275central_get_resource_list(device_t bus, device_t child)
276{
277	struct central_devinfo *cdi;
278
279	cdi = device_get_ivars(child);
280	return (&cdi->cdi_rl);
281}
282
283static const char *
284central_get_compat(device_t bus, device_t dev)
285{
286	struct central_devinfo *dinfo;
287
288	dinfo = device_get_ivars(dev);
289	return (dinfo->cdi_compat);
290}
291
292static const char *
293central_get_model(device_t bus, device_t dev)
294{
295	struct central_devinfo *dinfo;
296
297	dinfo = device_get_ivars(dev);
298	return (dinfo->cdi_model);
299}
300
301static const char *
302central_get_name(device_t bus, device_t dev)
303{
304	struct central_devinfo *dinfo;
305
306	dinfo = device_get_ivars(dev);
307	return (dinfo->cdi_name);
308}
309
310static phandle_t
311central_get_node(device_t bus, device_t dev)
312{
313	struct central_devinfo *dinfo;
314
315	dinfo = device_get_ivars(dev);
316	return (dinfo->cdi_node);
317}
318
319static const char *
320central_get_type(device_t bus, device_t dev)
321{
322	struct central_devinfo *dinfo;
323
324	dinfo = device_get_ivars(dev);
325	return (dinfo->cdi_type);
326}
327