1 /* $NetBSD: eisa.c,v 1.50 2024/05/13 00:01:53 msaitoh 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 1.50 2024/05/13 00:01:53 msaitoh 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 <sys/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(device_t, cfdata_t, void *);
59 static void eisaattach(device_t, device_t, void *);
60
61 CFATTACH_DECL_NEW(eisa, 0,
62 eisamatch, eisaattach, NULL, NULL);
63
64 static int eisaprint(void *, const char *);
65 static void eisa_devinfo(const char *, char *, size_t);
66
67 static int
eisamatch(device_t parent,cfdata_t cf,void * aux)68 eisamatch(device_t parent, cfdata_t cf,
69 void *aux)
70 {
71 /* XXX check other indicators */
72
73 return (1);
74 }
75
76 static int
eisaprint(void * aux,const char * pnp)77 eisaprint(void *aux, const char *pnp)
78 {
79 struct eisa_attach_args *ea = aux;
80 char devinfo[256];
81
82 if (pnp) {
83 eisa_devinfo(ea->ea_idstring, devinfo, sizeof(devinfo));
84 aprint_normal("%s at %s", devinfo, pnp);
85 }
86 aprint_normal(" slot %d", ea->ea_slot);
87 return (UNCONF);
88 }
89
90 static void
eisaattach(device_t parent,device_t self,void * aux)91 eisaattach(device_t parent, device_t self, void *aux)
92 {
93 struct eisabus_attach_args *eba = aux;
94 bus_space_tag_t iot, memt;
95 bus_dma_tag_t dmat;
96 eisa_chipset_tag_t ec;
97 int slot, maxnslots;
98
99 eisa_attach_hook(parent, self, eba);
100 printf("\n");
101
102 iot = eba->eba_iot;
103 memt = eba->eba_memt;
104 ec = eba->eba_ec;
105 dmat = eba->eba_dmat;
106
107 /*
108 * Search for and attach subdevices.
109 *
110 * Slot 0 is the "motherboard" slot, and the code attaching
111 * the EISA bus should have already attached an ISA bus there.
112 */
113 maxnslots = eisa_maxslots(ec);
114 for (slot = 1; slot < maxnslots; slot++) {
115 struct eisa_attach_args ea;
116 u_int slotaddr;
117 bus_space_handle_t slotioh;
118 int i;
119 int locs[EISACF_NLOCS];
120
121 ea.ea_iot = iot;
122 ea.ea_memt = memt;
123 ea.ea_ec = ec;
124 ea.ea_dmat = dmat;
125 ea.ea_slot = slot;
126 slotaddr = EISA_SLOT_ADDR(slot);
127
128 /*
129 * Get a mapping for the whole slot-specific address
130 * space. If we can't, assume nothing's there but warn
131 * about it.
132 */
133 if (bus_space_map(iot, slotaddr, EISA_SLOT_SIZE, 0, &slotioh)) {
134 aprint_error_dev(self,
135 "can't map I/O space for slot %d\n", slot);
136 continue;
137 }
138
139 /* Get the vendor ID bytes */
140 for (i = 0; i < EISA_NVIDREGS; i++)
141 ea.ea_vid[i] = bus_space_read_1(iot, slotioh,
142 EISA_SLOTOFF_VID + i);
143
144 /* Check for device existence */
145 if (EISA_VENDID_NODEV(ea.ea_vid)) {
146 #if 0
147 printf("no device at %s slot %d\n", device_xname(self),
148 slot);
149 printf("\t(0x%x, 0x%x)\n", ea.ea_vid[0], ea.ea_vid[1]);
150 #endif
151 bus_space_unmap(iot, slotioh, EISA_SLOT_SIZE);
152 continue;
153 }
154
155 /* And check that the firmware didn't biff something badly */
156 if (EISA_VENDID_IDDELAY(ea.ea_vid)) {
157 printf("%s slot %d not configured by BIOS?\n",
158 device_xname(self), slot);
159 bus_space_unmap(iot, slotioh, EISA_SLOT_SIZE);
160 continue;
161 }
162
163 /* Get the product ID bytes */
164 for (i = 0; i < EISA_NPIDREGS; i++)
165 ea.ea_pid[i] = bus_space_read_1(iot, slotioh,
166 EISA_SLOTOFF_PID + i);
167
168 /* Create the ID string from the vendor and product IDs */
169 ea.ea_idstring[0] = EISA_VENDID_0(ea.ea_vid);
170 ea.ea_idstring[1] = EISA_VENDID_1(ea.ea_vid);
171 ea.ea_idstring[2] = EISA_VENDID_2(ea.ea_vid);
172 ea.ea_idstring[3] = EISA_PRODID_0(ea.ea_pid);
173 ea.ea_idstring[4] = EISA_PRODID_1(ea.ea_pid);
174 ea.ea_idstring[5] = EISA_PRODID_2(ea.ea_pid);
175 ea.ea_idstring[6] = EISA_PRODID_3(ea.ea_pid);
176 ea.ea_idstring[7] = '\0'; /* sanity */
177
178 /* We no longer need the I/O handle; free it. */
179 bus_space_unmap(iot, slotioh, EISA_SLOT_SIZE);
180
181 locs[EISACF_SLOT] = slot;
182
183 /* Attach matching device. */
184 config_found(self, &ea, eisaprint,
185 CFARGS(.submatch = config_stdsubmatch,
186 .locators = locs));
187 }
188 }
189
190 int
eisa_compatible_match(const struct eisa_attach_args * const ea,const struct device_compatible_entry * dce)191 eisa_compatible_match(const struct eisa_attach_args * const ea,
192 const struct device_compatible_entry *dce)
193 {
194 const char *idstring = ea->ea_idstring;
195
196 return device_compatible_pmatch(&idstring, 1, dce);
197 }
198
199 const struct device_compatible_entry *
eisa_compatible_lookup(const struct eisa_attach_args * const ea,const struct device_compatible_entry * dce)200 eisa_compatible_lookup(const struct eisa_attach_args * const ea,
201 const struct device_compatible_entry *dce)
202 {
203 const char *idstring = ea->ea_idstring;
204
205 return device_compatible_plookup(&idstring, 1, dce);
206 }
207
208 #ifdef EISAVERBOSE
209 /*
210 * Descriptions of known vendors and devices ("products").
211 */
212 struct eisa_knowndev {
213 int flags;
214 const char *id, *name;
215 };
216 #define EISA_KNOWNDEV_NOPROD 0x01 /* match on vendor only */
217
218 #include <dev/eisa/eisadevs_data.h>
219 #endif /* EISAVEBSOSE */
220
221 void
eisa_devinfo(const char * id,char * cp,size_t l)222 eisa_devinfo(const char *id, char *cp, size_t l)
223 {
224 #ifdef EISAVERBOSE
225 const char *name;
226 const struct eisa_knowndev *edp;
227 int match, onlyvendor;
228
229 onlyvendor = 0;
230 name = NULL;
231
232 /* find the device in the table, if possible. */
233 for (edp = eisa_knowndevs; edp->id != NULL; edp++) {
234 if ((edp->flags & EISA_KNOWNDEV_NOPROD) != 0)
235 match = (strncmp(edp->id, id, 3) == 0);
236 else
237 match = (strcmp(edp->id, id) == 0);
238 if (match) {
239 name = edp->name;
240 onlyvendor = (edp->flags & EISA_KNOWNDEV_NOPROD) != 0;
241 break;
242 }
243 }
244
245 if (name == NULL)
246 snprintf(cp, l, "unknown device %s", id);
247 else if (onlyvendor)
248 snprintf(cp, l, "unknown %s device %s", name, id);
249 else
250 snprintf(cp, l, "%s", name);
251 #else /* EISAVERBOSE */
252
253 snprintf(cp, l, "device %s", id);
254 #endif /* EISAVERBOSE */
255 }
256