central.c revision 146398 
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 146398 2005-05-19 15:09:56Z 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	DEVMETHOD(bus_get_resource,	bus_generic_rl_get_resource),
92
93	/* ofw_bus interface */
94	DEVMETHOD(ofw_bus_get_compat,	central_get_compat),
95	DEVMETHOD(ofw_bus_get_model,	central_get_model),
96	DEVMETHOD(ofw_bus_get_name,	central_get_name),
97	DEVMETHOD(ofw_bus_get_node,	central_get_node),
98	DEVMETHOD(ofw_bus_get_type,	central_get_type),
99
100	{ NULL, NULL }
101};
102
103static driver_t central_driver = {
104	"central",
105	central_methods,
106	sizeof(struct central_softc),
107};
108
109static devclass_t central_devclass;
110
111DRIVER_MODULE(central, nexus, central_driver, central_devclass, 0, 0);
112
113static int
114central_probe(device_t dev)
115{
116
117	if (strcmp(nexus_get_name(dev), "central") == 0) {
118		device_set_desc(dev, "central");
119		return (0);
120	}
121	return (ENXIO);
122}
123
124static int
125central_attach(device_t dev)
126{
127	struct central_devinfo *cdi;
128	struct sbus_regs *reg;
129	struct central_softc *sc;
130	phandle_t child;
131	phandle_t node;
132	bus_addr_t size;
133	bus_addr_t off;
134	device_t cdev;
135	char *name;
136	int nreg;
137	int i;
138
139	sc = device_get_softc(dev);
140	node = nexus_get_node(dev);
141	sc->sc_node = node;
142
143	sc->sc_nrange = OF_getprop_alloc(node, "ranges",
144	    sizeof(*sc->sc_ranges), (void **)&sc->sc_ranges);
145	if (sc->sc_nrange == -1) {
146		device_printf(dev, "can't get ranges\n");
147		return (ENXIO);
148	}
149
150	for (child = OF_child(node); child != 0; child = OF_peer(child)) {
151		if ((OF_getprop_alloc(child, "name", 1, (void **)&name)) == -1)
152			continue;
153		cdev = device_add_child(dev, NULL, -1);
154		if (cdev != NULL) {
155			cdi = malloc(sizeof(*cdi), M_DEVBUF, M_WAITOK | M_ZERO);
156			if (cdi == NULL)
157				continue;
158			cdi->cdi_name = name;
159			cdi->cdi_node = child;
160			OF_getprop_alloc(child, "compatible", 1,
161			    (void **)&cdi->cdi_compat);
162			OF_getprop_alloc(child, "device_type", 1,
163			    (void **)&cdi->cdi_type);
164			OF_getprop_alloc(child, "model", 1,
165			    (void **)&cdi->cdi_model);
166			resource_list_init(&cdi->cdi_rl);
167			nreg = OF_getprop_alloc(child, "reg", sizeof(*reg),
168			    (void **)&reg);
169			if (nreg != -1) {
170				for (i = 0; i < nreg; i++) {
171					off = reg[i].sbr_offset;
172					size = reg[i].sbr_size;
173					resource_list_add(&cdi->cdi_rl,
174					    SYS_RES_MEMORY, i, off, off + size,
175					    size);
176				}
177				free(reg, M_OFWPROP);
178			}
179			device_set_ivars(cdev, cdi);
180		} else
181			free(name, M_OFWPROP);
182	}
183
184	return (bus_generic_attach(dev));
185}
186
187static int
188central_print_child(device_t dev, device_t child)
189{
190	struct central_devinfo *cdi;
191	int rv;
192
193	cdi = device_get_ivars(child);
194	rv = bus_print_child_header(dev, child);
195	rv += resource_list_print_type(&cdi->cdi_rl, "mem",
196	    SYS_RES_MEMORY, "%#lx");
197	rv += bus_print_child_footer(dev, child);
198	return (rv);
199}
200
201static void
202central_probe_nomatch(device_t dev, device_t child)
203{
204	struct central_devinfo *cdi;
205
206	cdi = device_get_ivars(child);
207	device_printf(dev, "<%s>", cdi->cdi_name);
208	resource_list_print_type(&cdi->cdi_rl, "mem", SYS_RES_MEMORY, "%#lx");
209	printf(" type %s (no driver attached)\n",
210	    cdi->cdi_type != NULL ? cdi->cdi_type : "unknown");
211}
212
213static struct resource *
214central_alloc_resource(device_t bus, device_t child, int type, int *rid,
215    u_long start, u_long end, u_long count, u_int flags)
216{
217	struct resource_list *rl;
218	struct resource_list_entry *rle;
219	struct central_softc *sc;
220	struct resource *res;
221	bus_addr_t coffset;
222	bus_addr_t cend;
223	bus_addr_t phys;
224	int isdefault;
225	int passthrough;
226	int i;
227
228	isdefault = (start == 0UL && end == ~0UL);
229	passthrough = (device_get_parent(child) != bus);
230	res = NULL;
231	rle = NULL;
232	rl = BUS_GET_RESOURCE_LIST(bus, child);
233	sc = device_get_softc(bus);
234	switch (type) {
235	case SYS_RES_IRQ:
236		return (resource_list_alloc(rl, bus, child, type, rid, start,
237		    end, count, flags));
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	}
269	return (res);
270}
271
272static struct resource_list *
273central_get_resource_list(device_t bus, device_t child)
274{
275	struct central_devinfo *cdi;
276
277	cdi = device_get_ivars(child);
278	return (&cdi->cdi_rl);
279}
280
281static const char *
282central_get_compat(device_t bus, device_t dev)
283{
284	struct central_devinfo *dinfo;
285
286	dinfo = device_get_ivars(dev);
287	return (dinfo->cdi_compat);
288}
289
290static const char *
291central_get_model(device_t bus, device_t dev)
292{
293	struct central_devinfo *dinfo;
294
295	dinfo = device_get_ivars(dev);
296	return (dinfo->cdi_model);
297}
298
299static const char *
300central_get_name(device_t bus, device_t dev)
301{
302	struct central_devinfo *dinfo;
303
304	dinfo = device_get_ivars(dev);
305	return (dinfo->cdi_name);
306}
307
308static phandle_t
309central_get_node(device_t bus, device_t dev)
310{
311	struct central_devinfo *dinfo;
312
313	dinfo = device_get_ivars(dev);
314	return (dinfo->cdi_node);
315}
316
317static const char *
318central_get_type(device_t bus, device_t dev)
319{
320	struct central_devinfo *dinfo;
321
322	dinfo = device_get_ivars(dev);
323	return (dinfo->cdi_type);
324}
325