1 /*
2 * Copyright 1998 Massachusetts Institute of Technology
3 *
4 * Permission to use, copy, modify, and distribute this software and
5 * its documentation for any purpose and without fee is hereby
6 * granted, provided that both the above copyright notice and this
7 * permission notice appear in all copies, that both the above
8 * copyright notice and this permission notice appear in all
9 * supporting documentation, and that the name of M.I.T. not be used
10 * in advertising or publicity pertaining to distribution of the
11 * software without specific, written prior permission. M.I.T. makes
12 * no representations about the suitability of this software for any
13 * purpose. It is provided "as is" without express or implied
14 * warranty.
15 *
16 * THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS
17 * ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE,
18 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
20 * SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
23 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
25 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
26 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * $FreeBSD: releng/5.1/sys/amd64/amd64/legacy.c 114349 2003-05-01 01:05:25Z peter $
30 */
31
32 /*
33 * This code implements a system driver for legacy systems that do not
34 * support ACPI or when ACPI support is not present in the kernel.
35 */
36
37 #include <sys/param.h>
38 #include <sys/systm.h>
39 #include <sys/bus.h>
40 #include <sys/kernel.h>
41 #include <sys/malloc.h>
42 #include <machine/bus.h>
43 #include <sys/rman.h>
44
45 #include <machine/legacyvar.h>
46 #include <machine/resource.h>
47
48 static MALLOC_DEFINE(M_LEGACYDEV, "legacydrv", "legacy system device");
49 struct legacy_device {
50 struct resource_list lg_resources;
51 int lg_pcibus;
52 };
53
54 #define DEVTOAT(dev) ((struct legacy_device *)device_get_ivars(dev))
55
56 static void legacy_identify(driver_t *driver, device_t parent);
57 static int legacy_probe(device_t);
58 static int legacy_attach(device_t);
59 static int legacy_print_child(device_t, device_t);
60 static device_t legacy_add_child(device_t bus, int order, const char *name,
61 int unit);
62 static struct resource *legacy_alloc_resource(device_t, device_t, int, int *,
63 u_long, u_long, u_long, u_int);
64 static int legacy_read_ivar(device_t, device_t, int, uintptr_t *);
65 static int legacy_write_ivar(device_t, device_t, int, uintptr_t);
66 static int legacy_release_resource(device_t, device_t, int, int,
67 struct resource *);
68 static int legacy_set_resource(device_t, device_t, int, int, u_long, u_long);
69 static int legacy_get_resource(device_t, device_t, int, int, u_long *, u_long *);
70 static void legacy_delete_resource(device_t, device_t, int, int);
71
72 static device_method_t legacy_methods[] = {
73 /* Device interface */
74 DEVMETHOD(device_identify, legacy_identify),
75 DEVMETHOD(device_probe, legacy_probe),
76 DEVMETHOD(device_attach, legacy_attach),
77 DEVMETHOD(device_detach, bus_generic_detach),
78 DEVMETHOD(device_shutdown, bus_generic_shutdown),
79 DEVMETHOD(device_suspend, bus_generic_suspend),
80 DEVMETHOD(device_resume, bus_generic_resume),
81
82 /* Bus interface */
83 DEVMETHOD(bus_print_child, legacy_print_child),
84 DEVMETHOD(bus_add_child, legacy_add_child),
85 DEVMETHOD(bus_read_ivar, legacy_read_ivar),
86 DEVMETHOD(bus_write_ivar, legacy_write_ivar),
87 DEVMETHOD(bus_set_resource, legacy_set_resource),
88 DEVMETHOD(bus_get_resource, legacy_get_resource),
89 DEVMETHOD(bus_alloc_resource, legacy_alloc_resource),
90 DEVMETHOD(bus_release_resource, legacy_release_resource),
91 DEVMETHOD(bus_delete_resource, legacy_delete_resource),
92 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
93 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
94 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
95 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
96
97 { 0, 0 }
98 };
99
100 static driver_t legacy_driver = {
101 "legacy",
102 legacy_methods,
103 1, /* no softc */
104 };
105 static devclass_t legacy_devclass;
106
107 DRIVER_MODULE(legacy, nexus, legacy_driver, legacy_devclass, 0, 0);
108
109 static void
110 legacy_identify(driver_t *driver, device_t parent)
111 {
112
113 /*
114 * Add child device with order of 1 so it gets probed
115 * after ACPI (which is at order 0.
116 */
117 if (BUS_ADD_CHILD(parent, 1, "legacy", 0) == NULL)
118 panic("legacy: could not attach");
119 }
120
121 static int
122 legacy_probe(device_t dev)
123 {
124 device_t acpi;
125
126 /*
127 * Fail to probe if ACPI is ok.
128 */
129 acpi = devclass_get_device(devclass_find("acpi"), 0);
130 if (acpi != NULL && device_is_alive(acpi))
131 return (ENXIO);
132 device_set_desc(dev, "legacy system");
133 device_quiet(dev);
134 return (0);
135 }
136
137 static int
138 legacy_attach(device_t dev)
139 {
140 device_t child;
141
142 /*
143 * First, let our child driver's identify any child devices that
144 * they can find. Once that is done attach any devices that we
145 * found.
146 */
147 bus_generic_probe(dev);
148 bus_generic_attach(dev);
149
150 /*
151 * If we didn't see ISA on a pci bridge, create some
152 * connection points now so it shows up "on motherboard".
153 */
154 if (!devclass_get_device(devclass_find("isa"), 0)) {
155 child = BUS_ADD_CHILD(dev, 0, "isa", 0);
156 if (child == NULL)
157 panic("legacy_attach isa");
158 device_probe_and_attach(child);
159 }
160
161 return 0;
162 }
163
164 static int
165 legacy_print_all_resources(device_t dev)
166 {
167 struct legacy_device *atdev = DEVTOAT(dev);
168 struct resource_list *rl = &atdev->lg_resources;
169 int retval = 0;
170
171 if (SLIST_FIRST(rl) || atdev->lg_pcibus != -1)
172 retval += printf(" at");
173
174 retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#lx");
175 retval += resource_list_print_type(rl, "iomem", SYS_RES_MEMORY, "%#lx");
176 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld");
177
178 return retval;
179 }
180
181 static int
182 legacy_print_child(device_t bus, device_t child)
183 {
184 struct legacy_device *atdev = DEVTOAT(child);
185 int retval = 0;
186
187 retval += bus_print_child_header(bus, child);
188 retval += legacy_print_all_resources(child);
189 if (atdev->lg_pcibus != -1)
190 retval += printf(" pcibus %d", atdev->lg_pcibus);
191 retval += printf(" on motherboard\n"); /* XXX "motherboard", ick */
192
193 return (retval);
194 }
195
196 static device_t
197 legacy_add_child(device_t bus, int order, const char *name, int unit)
198 {
199 device_t child;
200 struct legacy_device *atdev;
201
202 atdev = malloc(sizeof(struct legacy_device), M_LEGACYDEV,
203 M_NOWAIT | M_ZERO);
204 if (!atdev)
205 return(0);
206 resource_list_init(&atdev->lg_resources);
207 atdev->lg_pcibus = -1;
208
209 child = device_add_child_ordered(bus, order, name, unit);
210
211 /* should we free this in legacy_child_detached? */
212 device_set_ivars(child, atdev);
213
214 return(child);
215 }
216
217 static int
218 legacy_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
219 {
220 struct legacy_device *atdev = DEVTOAT(child);
221
222 switch (which) {
223 case LEGACY_IVAR_PCIBUS:
224 *result = atdev->lg_pcibus;
225 break;
226 default:
227 return ENOENT;
228 }
229 return 0;
230 }
231
232
233 static int
234 legacy_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
235 {
236 struct legacy_device *atdev = DEVTOAT(child);
237
238 switch (which) {
239 case LEGACY_IVAR_PCIBUS:
240 atdev->lg_pcibus = value;
241 break;
242 default:
243 return ENOENT;
244 }
245 return 0;
246 }
247
248
249 static struct resource *
250 legacy_alloc_resource(device_t bus, device_t child, int type, int *rid,
251 u_long start, u_long end, u_long count, u_int flags)
252 {
253 struct legacy_device *atdev = DEVTOAT(child);
254 struct resource_list *rl = &atdev->lg_resources;
255
256 return (resource_list_alloc(rl, bus, child, type, rid, start, end,
257 count, flags));
258 }
259
260 static int
261 legacy_release_resource(device_t bus, device_t child, int type, int rid,
262 struct resource *r)
263 {
264 struct legacy_device *atdev = DEVTOAT(child);
265 struct resource_list *rl = &atdev->lg_resources;
266
267 return (resource_list_release(rl, bus, child, type, rid, r));
268 }
269
270 static int
271 legacy_set_resource(device_t dev, device_t child, int type, int rid,
272 u_long start, u_long count)
273 {
274 struct legacy_device *atdev = DEVTOAT(child);
275 struct resource_list *rl = &atdev->lg_resources;
276
277 resource_list_add(rl, type, rid, start, start + count - 1, count);
278 return(0);
279 }
280
281 static int
282 legacy_get_resource(device_t dev, device_t child, int type, int rid,
283 u_long *startp, u_long *countp)
284 {
285 struct legacy_device *atdev = DEVTOAT(child);
286 struct resource_list *rl = &atdev->lg_resources;
287 struct resource_list_entry *rle;
288
289 rle = resource_list_find(rl, type, rid);
290 if (!rle)
291 return(ENOENT);
292 if (startp)
293 *startp = rle->start;
294 if (countp)
295 *countp = rle->count;
296 return(0);
297 }
298
299 static void
300 legacy_delete_resource(device_t dev, device_t child, int type, int rid)
301 {
302 struct legacy_device *atdev = DEVTOAT(child);
303 struct resource_list *rl = &atdev->lg_resources;
304
305 resource_list_delete(rl, type, rid);
306 }
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