FreeBSD/Linux Kernel Cross Reference
sys/dev/eisa/eisa.c
1 /* $NetBSD: eisa.c,v 1.31 2003/01/01 00:10:17 thorpej Exp $ */
2
3 /*
4 * Copyright (c) 1995, 1996 Christopher G. Demetriou
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. All advertising materials mentioning features or use of this software
16 * must display the following acknowledgement:
17 * This product includes software developed by Christopher G. Demetriou
18 * for the NetBSD Project.
19 * 4. The name of the author may not be used to endorse or promote products
20 * derived from this software without specific prior written permission
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
25 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
27 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
31 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 */
33
34 /*
35 * EISA Bus device
36 *
37 * Makes sure an EISA bus is present, and finds and attaches devices
38 * living on it.
39 */
40
41 #include <sys/cdefs.h>
42 __KERNEL_RCSID(0, "$NetBSD: eisa.c,v 1.31 2003/01/01 00:10:17 thorpej Exp $");
43
44 #include "opt_eisaverbose.h"
45
46 #include <sys/param.h>
47 #include <sys/systm.h>
48 #include <sys/device.h>
49
50 #include <machine/bus.h>
51
52 #include <dev/eisa/eisareg.h>
53 #include <dev/eisa/eisavar.h>
54 #include <dev/eisa/eisadevs.h>
55
56 int eisamatch(struct device *, struct cfdata *, void *);
57 void eisaattach(struct device *, struct device *, void *);
58
59 CFATTACH_DECL(eisa, sizeof(struct device),
60 eisamatch, eisaattach, NULL, NULL);
61
62 int eisasubmatch(struct device *, struct cfdata *, void *);
63 int eisaprint(void *, const char *);
64 void eisa_devinfo(const char *, char *);
65
66 int
67 eisamatch(struct device *parent, struct cfdata *cf, void *aux)
68 {
69 struct eisabus_attach_args *eba = aux;
70
71 if (strcmp(eba->eba_busname, cf->cf_name))
72 return (0);
73
74 /* XXX check other indicators */
75
76 return (1);
77 }
78
79 int
80 eisaprint(void *aux, const char *pnp)
81 {
82 struct eisa_attach_args *ea = aux;
83 char devinfo[256];
84
85 if (pnp) {
86 eisa_devinfo(ea->ea_idstring, devinfo);
87 aprint_normal("%s at %s", devinfo, pnp);
88 }
89 aprint_normal(" slot %d", ea->ea_slot);
90 return (UNCONF);
91 }
92
93 int
94 eisasubmatch(struct device *parent, struct cfdata *cf, void *aux)
95 {
96 struct eisa_attach_args *ea = aux;
97
98 if (cf->eisacf_slot != EISA_UNKNOWN_SLOT &&
99 cf->eisacf_slot != ea->ea_slot)
100 return (0);
101 return (config_match(parent, cf, aux));
102 }
103
104 void
105 eisaattach(struct device *parent, struct device *self, void *aux)
106 {
107 struct eisabus_attach_args *eba = aux;
108 bus_space_tag_t iot, memt;
109 bus_dma_tag_t dmat;
110 eisa_chipset_tag_t ec;
111 int slot, maxnslots;
112
113 eisa_attach_hook(parent, self, eba);
114 printf("\n");
115
116 iot = eba->eba_iot;
117 memt = eba->eba_memt;
118 ec = eba->eba_ec;
119 dmat = eba->eba_dmat;
120
121 /*
122 * Search for and attach subdevices.
123 *
124 * Slot 0 is the "motherboard" slot, and the code attaching
125 * the EISA bus should have already attached an ISA bus there.
126 */
127 maxnslots = eisa_maxslots(ec);
128 for (slot = 1; slot < maxnslots; slot++) {
129 struct eisa_attach_args ea;
130 u_int slotaddr;
131 bus_space_handle_t slotioh;
132 int i;
133
134 ea.ea_iot = iot;
135 ea.ea_memt = memt;
136 ea.ea_ec = ec;
137 ea.ea_dmat = dmat;
138 ea.ea_slot = slot;
139 slotaddr = EISA_SLOT_ADDR(slot);
140
141 /*
142 * Get a mapping for the whole slot-specific address
143 * space. If we can't, assume nothing's there but warn
144 * about it.
145 */
146 if (bus_space_map(iot, slotaddr, EISA_SLOT_SIZE, 0, &slotioh)) {
147 printf("%s: can't map I/O space for slot %d\n",
148 self->dv_xname, slot);
149 continue;
150 }
151
152 /* Get the vendor ID bytes */
153 for (i = 0; i < EISA_NVIDREGS; i++)
154 ea.ea_vid[i] = bus_space_read_1(iot, slotioh,
155 EISA_SLOTOFF_VID + i);
156
157 /* Check for device existence */
158 if (EISA_VENDID_NODEV(ea.ea_vid)) {
159 #if 0
160 printf("no device at %s slot %d\n", self->dv_xname,
161 slot);
162 printf("\t(0x%x, 0x%x)\n", ea.ea_vid[0],
163 ea.ea_vid[1]);
164 #endif
165 bus_space_unmap(iot, slotioh, EISA_SLOT_SIZE);
166 continue;
167 }
168
169 /* And check that the firmware didn't biff something badly */
170 if (EISA_VENDID_IDDELAY(ea.ea_vid)) {
171 printf("%s slot %d not configured by BIOS?\n",
172 self->dv_xname, slot);
173 bus_space_unmap(iot, slotioh, EISA_SLOT_SIZE);
174 continue;
175 }
176
177 /* Get the product ID bytes */
178 for (i = 0; i < EISA_NPIDREGS; i++)
179 ea.ea_pid[i] = bus_space_read_1(iot, slotioh,
180 EISA_SLOTOFF_PID + i);
181
182 /* Create the ID string from the vendor and product IDs */
183 ea.ea_idstring[0] = EISA_VENDID_0(ea.ea_vid);
184 ea.ea_idstring[1] = EISA_VENDID_1(ea.ea_vid);
185 ea.ea_idstring[2] = EISA_VENDID_2(ea.ea_vid);
186 ea.ea_idstring[3] = EISA_PRODID_0(ea.ea_pid);
187 ea.ea_idstring[4] = EISA_PRODID_1(ea.ea_pid);
188 ea.ea_idstring[5] = EISA_PRODID_2(ea.ea_pid);
189 ea.ea_idstring[6] = EISA_PRODID_3(ea.ea_pid);
190 ea.ea_idstring[7] = '\0'; /* sanity */
191
192 /* We no longer need the I/O handle; free it. */
193 bus_space_unmap(iot, slotioh, EISA_SLOT_SIZE);
194
195 /* Attach matching device. */
196 config_found_sm(self, &ea, eisaprint, eisasubmatch);
197 }
198 }
199
200 #ifdef EISAVERBOSE
201 /*
202 * Descriptions of of known vendors and devices ("products").
203 */
204 struct eisa_knowndev {
205 int flags;
206 const char *id, *name;
207 };
208 #define EISA_KNOWNDEV_NOPROD 0x01 /* match on vendor only */
209
210 #include <dev/eisa/eisadevs_data.h>
211 #endif /* EISAVEBSOSE */
212
213 void
214 eisa_devinfo(const char *id, char *cp)
215 {
216 #ifdef EISAVERBOSE
217 const char *name;
218 const struct eisa_knowndev *edp;
219 int match, onlyvendor;
220
221 onlyvendor = 0;
222 name = NULL;
223
224 /* find the device in the table, if possible. */
225 for (edp = eisa_knowndevs; edp->id != NULL; edp++) {
226 if ((edp->flags & EISA_KNOWNDEV_NOPROD) != 0)
227 match = (strncmp(edp->id, id, 3) == 0);
228 else
229 match = (strcmp(edp->id, id) == 0);
230 if (match) {
231 name = edp->name;
232 onlyvendor = (edp->flags & EISA_KNOWNDEV_NOPROD) != 0;
233 break;
234 }
235 }
236
237 if (name == NULL)
238 sprintf(cp, "unknown device %s", id);
239 else if (onlyvendor)
240 sprintf(cp, "unknown %s device %s", name, id);
241 else
242 sprintf(cp, "%s", name);
243 #else /* EISAVERBOSE */
244
245 sprintf(cp, "device %s", id);
246 #endif /* EISAVERBOSE */
247 }
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