FreeBSD/Linux Kernel Cross Reference
sys/dev/eisa/eisa.c
1 /* $NetBSD: eisa.c,v 1.36 2005/02/27 00:26:59 perry 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 1.36 2005/02/27 00:26:59 perry 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 #include "locators.h"
57
58 static int eisamatch(struct device *, struct cfdata *, void *);
59 static void eisaattach(struct device *, struct device *, void *);
60
61 CFATTACH_DECL(eisa, sizeof(struct device),
62 eisamatch, eisaattach, NULL, NULL);
63
64 static int eisasubmatch(struct device *, struct cfdata *,
65 const locdesc_t *, void *);
66 static int eisaprint(void *, const char *);
67 static void eisa_devinfo(const char *, char *, size_t);
68
69 static int
70 eisamatch(struct device *parent, struct cfdata *cf, void *aux)
71 {
72 /* XXX check other indicators */
73
74 return (1);
75 }
76
77 static int
78 eisaprint(void *aux, const char *pnp)
79 {
80 struct eisa_attach_args *ea = aux;
81 char devinfo[256];
82
83 if (pnp) {
84 eisa_devinfo(ea->ea_idstring, devinfo, sizeof(devinfo));
85 aprint_normal("%s at %s", devinfo, pnp);
86 }
87 aprint_normal(" slot %d", ea->ea_slot);
88 return (UNCONF);
89 }
90
91 static int
92 eisasubmatch(struct device *parent, struct cfdata *cf,
93 const locdesc_t * ldesc, void *aux)
94 {
95
96 if (cf->cf_loc[EISACF_SLOT] != EISACF_SLOT_DEFAULT &&
97 cf->cf_loc[EISACF_SLOT] != ldesc->locs[EISACF_SLOT])
98 return (0);
99 return (config_match(parent, cf, aux));
100 }
101
102 static void
103 eisaattach(struct device *parent, struct device *self, void *aux)
104 {
105 struct eisabus_attach_args *eba = aux;
106 bus_space_tag_t iot, memt;
107 bus_dma_tag_t dmat;
108 eisa_chipset_tag_t ec;
109 int slot, maxnslots;
110
111 eisa_attach_hook(parent, self, eba);
112 printf("\n");
113
114 iot = eba->eba_iot;
115 memt = eba->eba_memt;
116 ec = eba->eba_ec;
117 dmat = eba->eba_dmat;
118
119 /*
120 * Search for and attach subdevices.
121 *
122 * Slot 0 is the "motherboard" slot, and the code attaching
123 * the EISA bus should have already attached an ISA bus there.
124 */
125 maxnslots = eisa_maxslots(ec);
126 for (slot = 1; slot < maxnslots; slot++) {
127 struct eisa_attach_args ea;
128 u_int slotaddr;
129 bus_space_handle_t slotioh;
130 int i;
131 int help[2];
132 locdesc_t *ldesc = (void *)help; /* XXX */
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 ldesc->len = 1;
196 ldesc->locs[EISACF_SLOT] = slot;
197
198 /* Attach matching device. */
199 config_found_sm_loc(self, "eisa", ldesc, &ea,
200 eisaprint, eisasubmatch);
201 }
202 }
203
204 #ifdef EISAVERBOSE
205 /*
206 * Descriptions of of known vendors and devices ("products").
207 */
208 struct eisa_knowndev {
209 int flags;
210 const char *id, *name;
211 };
212 #define EISA_KNOWNDEV_NOPROD 0x01 /* match on vendor only */
213
214 #include <dev/eisa/eisadevs_data.h>
215 #endif /* EISAVEBSOSE */
216
217 void
218 eisa_devinfo(const char *id, char *cp, size_t l)
219 {
220 #ifdef EISAVERBOSE
221 const char *name;
222 const struct eisa_knowndev *edp;
223 int match, onlyvendor;
224
225 onlyvendor = 0;
226 name = NULL;
227
228 /* find the device in the table, if possible. */
229 for (edp = eisa_knowndevs; edp->id != NULL; edp++) {
230 if ((edp->flags & EISA_KNOWNDEV_NOPROD) != 0)
231 match = (strncmp(edp->id, id, 3) == 0);
232 else
233 match = (strcmp(edp->id, id) == 0);
234 if (match) {
235 name = edp->name;
236 onlyvendor = (edp->flags & EISA_KNOWNDEV_NOPROD) != 0;
237 break;
238 }
239 }
240
241 if (name == NULL)
242 snprintf(cp, l, "unknown device %s", id);
243 else if (onlyvendor)
244 snprintf(cp, l, "unknown %s device %s", name, id);
245 else
246 snprintf(cp, l, "%s", name);
247 #else /* EISAVERBOSE */
248
249 snprintf(cp, l, "device %s", id);
250 #endif /* EISAVERBOSE */
251 }
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