2 * Copyright (c) 1998 Michael Smith <msmith@freebsd.org>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
26 * $FreeBSD: src/sys/boot/i386/libi386/biospci.c,v 1.2.2.1 2000/12/28 13:12:39 ps Exp $
30 * PnP enumerator using the PCI BIOS.
34 #include <machine/stdarg.h>
35 #include <bootstrap.h>
40 * Stupid PCI BIOS interface doesn't let you simply enumerate everything
41 * that's there, instead you have to ask it if it has something.
43 * So we have to scan by class code, subclass code and sometimes programming
53 static struct pci_progif progif_null[] = {
58 static struct pci_progif progif_display[] = {
64 static struct pci_progif progif_ide[] = {
100 static struct pci_progif progif_serial[] = {
107 static struct pci_progif progif_parallel[] = {
109 {0x1, "Bidirectional"},
119 struct pci_progif *ps_progif; /* if set, use for programming interface value(s) */
122 static struct pci_subclass subclass_old[] = {
123 {0x0, "Old non-VGA", progif_null},
124 {0x1, "Old VGA", progif_null},
128 static struct pci_subclass subclass_mass[] = {
129 {0x0, "SCSI", progif_null},
130 {0x1, "IDE", progif_ide},
131 {0x2, "Floppy disk", progif_null},
132 {0x3, "IPI", progif_null},
133 {0x4, "RAID", progif_null},
134 {0x80, "mass storage", progif_null},
138 static struct pci_subclass subclass_net[] = {
139 {0x0, "Ethernet", progif_null},
140 {0x1, "Token ring", progif_null},
141 {0x2, "FDDI", progif_null},
142 {0x3, "ATM", progif_null},
143 {0x80, "network", progif_null},
147 static struct pci_subclass subclass_display[] = {
148 {0x0, NULL, progif_display},
149 {0x1, "XGA", progif_null},
150 {0x80, "other", progif_null},
154 static struct pci_subclass subclass_comms[] = {
155 {0x0, "serial", progif_serial},
156 {0x1, "parallel", progif_parallel},
157 {0x80, "communications", progif_null},
161 static struct pci_subclass subclass_serial[] = {
162 {0x0, "Firewire", progif_null},
163 {0x1, "ACCESS.bus", progif_null},
164 {0x2, "SSA", progif_null},
165 {0x3, "USB", progif_null},
166 {0x4, "Fibrechannel", progif_null},
170 static struct pci_class
174 struct pci_subclass *pc_subclass;
176 {0x0, "device", subclass_old},
177 {0x1, "controller", subclass_mass},
178 {0x2, "controller", subclass_net},
179 {0x3, "display", subclass_display},
180 {0x7, "controller", subclass_comms},
181 {0xc, "controller", subclass_serial},
186 static void biospci_enumerate(void);
187 static void biospci_addinfo(int devid, struct pci_class *pc, struct pci_subclass *psc, struct pci_progif *ppi);
189 static int biospci_version;
190 static int biospci_hwcap;
192 struct pnphandler biospcihandler =
199 biospci_enumerate(void)
201 int device_index, locator, devid;
202 struct pci_class *pc;
203 struct pci_subclass *psc;
204 struct pci_progif *ppi;
206 /* Find the PCI BIOS */
213 /* Check for OK response */
214 if ((v86.efl & 1) || ((v86.eax & 0xff00) != 0) || (v86.edx != 0x20494350))
217 biospci_version = v86.ebx & 0xffff;
218 biospci_hwcap = v86.eax & 0xff;
220 printf("PCI BIOS %d.%d%s%s\n",
221 bcd2bin((biospci_version >> 8) & 0xf), bcd2bin(biospci_version & 0xf),
222 (biospci_hwcap & 1) ? " config1" : "", (biospci_hwcap & 2) ? " config2" : "");
224 /* Iterate over known classes */
225 for (pc = pci_classes; pc->pc_class >= 0; pc++) {
226 /* Iterate over subclasses */
227 for (psc = pc->pc_subclass; psc->ps_subclass >= 0; psc++) {
228 /* Iterate over programming interfaces */
229 for (ppi = psc->ps_progif; ppi->pi_code >= 0; ppi++) {
231 /* Scan for matches */
232 for (device_index = 0; ; device_index++) {
234 /* Look for a match */
238 v86.ecx = (pc->pc_class << 16) + (psc->ps_subclass << 8) + ppi->pi_code;
239 v86.esi = device_index;
241 /* error/end of matches */
242 if ((v86.efl & 1) || (v86.eax & 0xff00))
248 /* Read the device identifier from the nominated device */
256 if ((v86.efl & 1) || (v86.eax & 0xff00))
259 /* We have the device ID, create a PnP object and save everything */
261 biospci_addinfo(devid, pc, psc, ppi);
269 biospci_addinfo(int devid, struct pci_class *pc, struct pci_subclass *psc, struct pci_progif *ppi)
275 /* build the description */
277 if (ppi->pi_name != NULL) {
278 strcat(desc, ppi->pi_name);
281 if (psc->ps_name != NULL) {
282 strcat(desc, psc->ps_name);
285 if (pc->pc_name != NULL)
286 strcat(desc, pc->pc_name);
288 pi = pnp_allocinfo();
289 pi->pi_desc = strdup(desc);
290 sprintf(desc,"0x%08x", devid);
291 pnp_addident(pi, desc);