1 /*-
2 * Copyright (c) 2006 IronPort Systems Inc. <ambrisko@ironport.com>
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: releng/8.4/sys/dev/ipmi/ipmi_isa.c 171464 2007-07-16 17:03:48Z ambrisko $");
29
30 #include <sys/param.h>
31 #include <sys/systm.h>
32 #include <sys/bus.h>
33 #include <sys/condvar.h>
34 #include <sys/eventhandler.h>
35 #include <sys/kernel.h>
36 #include <sys/module.h>
37 #include <sys/rman.h>
38 #include <sys/selinfo.h>
39
40 #include <machine/pci_cfgreg.h>
41 #include <dev/pci/pcireg.h>
42
43 #include <isa/isavar.h>
44
45 #ifdef LOCAL_MODULE
46 #include <ipmi.h>
47 #include <ipmivars.h>
48 #else
49 #include <sys/ipmi.h>
50 #include <dev/ipmi/ipmivars.h>
51 #endif
52
53 static void
54 ipmi_isa_identify(driver_t *driver, device_t parent)
55 {
56 struct ipmi_get_info info;
57 uint32_t devid;
58
59 if (ipmi_smbios_identify(&info) && info.iface_type != SSIF_MODE &&
60 device_find_child(parent, "ipmi", -1) == NULL) {
61 /*
62 * XXX: Hack alert. On some broken systems, the IPMI
63 * interface is described via SMBIOS, but the actual
64 * IO resource is in a PCI device BAR, so we have to let
65 * the PCI device attach ipmi instead. In that case don't
66 * create an isa ipmi device. For now we hardcode the list
67 * of bus, device, function tuples.
68 */
69 devid = pci_cfgregread(0, 4, 2, PCIR_DEVVENDOR, 4);
70 if (devid != 0xffffffff &&
71 ipmi_pci_match(devid & 0xffff, devid >> 16) != NULL)
72 return;
73 BUS_ADD_CHILD(parent, 0, "ipmi", -1);
74 }
75 }
76
77 static int
78 ipmi_isa_probe(device_t dev)
79 {
80
81 /* Skip any PNP devices. */
82 if (isa_get_logicalid(dev) != 0)
83 return (ENXIO);
84
85 device_set_desc(dev, "IPMI System Interface");
86 return (BUS_PROBE_DEFAULT);
87 }
88
89 static int
90 ipmi_hint_identify(device_t dev, struct ipmi_get_info *info)
91 {
92 const char *mode, *name;
93 int i, unit, val;
94
95 /* We require at least a "mode" hint. */
96 name = device_get_name(dev);
97 unit = device_get_unit(dev);
98 if (resource_string_value(name, unit, "mode", &mode) != 0)
99 return (0);
100
101 /* Set the mode and default I/O resources for each mode. */
102 bzero(info, sizeof(struct ipmi_get_info));
103 if (strcasecmp(mode, "KCS") == 0) {
104 info->iface_type = KCS_MODE;
105 info->address = 0xca2;
106 info->io_mode = 1;
107 info->offset = 1;
108 } else if (strcasecmp(mode, "SMIC") == 0) {
109 info->iface_type = SMIC_MODE;
110 info->address = 0xca9;
111 info->io_mode = 1;
112 info->offset = 1;
113 } else if (strcasecmp(mode, "BT") == 0) {
114 info->iface_type = BT_MODE;
115 info->address = 0xe4;
116 info->io_mode = 1;
117 info->offset = 1;
118 } else {
119 device_printf(dev, "Invalid mode %s\n", mode);
120 return (0);
121 }
122
123 /*
124 * Kill any resources that isahint.c might have setup for us
125 * since it will conflict with how we do resources.
126 */
127 for (i = 0; i < 2; i++) {
128 bus_delete_resource(dev, SYS_RES_MEMORY, i);
129 bus_delete_resource(dev, SYS_RES_IOPORT, i);
130 }
131
132 /* Allow the I/O address to be overriden via hints. */
133 if (resource_int_value(name, unit, "port", &val) == 0 && val != 0) {
134 info->address = val;
135 info->io_mode = 1;
136 } else if (resource_int_value(name, unit, "maddr", &val) == 0 &&
137 val != 0) {
138 info->address = val;
139 info->io_mode = 0;
140 }
141
142 /* Allow the spacing to be overriden. */
143 if (resource_int_value(name, unit, "spacing", &val) == 0) {
144 switch (val) {
145 case 8:
146 info->offset = 1;
147 break;
148 case 16:
149 info->offset = 2;
150 break;
151 case 32:
152 info->offset = 4;
153 break;
154 default:
155 device_printf(dev, "Invalid register spacing\n");
156 return (0);
157 }
158 }
159 return (1);
160 }
161
162 static int
163 ipmi_isa_attach(device_t dev)
164 {
165 struct ipmi_softc *sc = device_get_softc(dev);
166 struct ipmi_get_info info;
167 const char *mode;
168 int count, error, i, type;
169
170 /*
171 * Pull info out of the SMBIOS table. If that doesn't work, use
172 * hints to enumerate a device.
173 */
174 if (!ipmi_smbios_identify(&info) &&
175 !ipmi_hint_identify(dev, &info))
176 return (ENXIO);
177
178 /*
179 * Give other drivers precedence. Unfortunately, this doesn't
180 * work if we have an SMBIOS table that duplicates a PCI device
181 * that's later on the bus than the PCI-ISA bridge.
182 */
183 if (ipmi_attached)
184 return (EBUSY);
185
186 switch (info.iface_type) {
187 case KCS_MODE:
188 count = 2;
189 mode = "KCS";
190 break;
191 case SMIC_MODE:
192 count = 3;
193 mode = "SMIC";
194 break;
195 case BT_MODE:
196 device_printf(dev, "BT mode is unsupported\n");
197 return (ENXIO);
198 default:
199 return (ENXIO);
200 }
201 error = 0;
202 sc->ipmi_dev = dev;
203
204 device_printf(dev, "%s mode found at %s 0x%jx alignment 0x%x on %s\n",
205 mode, info.io_mode ? "io" : "mem",
206 (uintmax_t)info.address, info.offset,
207 device_get_name(device_get_parent(dev)));
208 if (info.io_mode)
209 type = SYS_RES_IOPORT;
210 else
211 type = SYS_RES_MEMORY;
212
213 sc->ipmi_io_type = type;
214 sc->ipmi_io_spacing = info.offset;
215 if (info.offset == 1) {
216 sc->ipmi_io_rid = 0;
217 sc->ipmi_io_res[0] = bus_alloc_resource(dev, type,
218 &sc->ipmi_io_rid, info.address, info.address + count - 1,
219 count, RF_ACTIVE);
220 if (sc->ipmi_io_res[0] == NULL) {
221 device_printf(dev, "couldn't configure I/O resource\n");
222 return (ENXIO);
223 }
224 } else {
225 for (i = 0; i < count; i++) {
226 sc->ipmi_io_rid = i;
227 sc->ipmi_io_res[i] = bus_alloc_resource(dev, type,
228 &sc->ipmi_io_rid, info.address + i * info.offset,
229 info.address + i * info.offset, 1, RF_ACTIVE);
230 if (sc->ipmi_io_res[i] == NULL) {
231 device_printf(dev,
232 "couldn't configure I/O resource\n");
233 error = ENXIO;
234 sc->ipmi_io_rid = 0;
235 goto bad;
236 }
237 }
238 sc->ipmi_io_rid = 0;
239 }
240
241 if (info.irq != 0) {
242 sc->ipmi_irq_rid = 0;
243 sc->ipmi_irq_res = bus_alloc_resource(dev, SYS_RES_IRQ,
244 &sc->ipmi_irq_rid, info.irq, info.irq, 1,
245 RF_SHAREABLE | RF_ACTIVE);
246 }
247
248 switch (info.iface_type) {
249 case KCS_MODE:
250 error = ipmi_kcs_attach(sc);
251 if (error)
252 goto bad;
253 break;
254 case SMIC_MODE:
255 error = ipmi_smic_attach(sc);
256 if (error)
257 goto bad;
258 break;
259 }
260
261 error = ipmi_attach(dev);
262 if (error)
263 goto bad;
264
265 return (0);
266 bad:
267 ipmi_release_resources(dev);
268 return (error);
269 }
270
271 static device_method_t ipmi_methods[] = {
272 /* Device interface */
273 DEVMETHOD(device_identify, ipmi_isa_identify),
274 DEVMETHOD(device_probe, ipmi_isa_probe),
275 DEVMETHOD(device_attach, ipmi_isa_attach),
276 DEVMETHOD(device_detach, ipmi_detach),
277 { 0, 0 }
278 };
279
280 static driver_t ipmi_isa_driver = {
281 "ipmi",
282 ipmi_methods,
283 sizeof(struct ipmi_softc),
284 };
285
286 DRIVER_MODULE(ipmi_isa, isa, ipmi_isa_driver, ipmi_devclass, 0, 0);
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