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
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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
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26 * $FreeBSD: src/sys/boot/i386/libi386/biospci.c,v 1.4 2003/08/25 23:28:31 obrien Exp $
27 * $DragonFly: src/sys/boot/pc32/libi386/biospci.c,v 1.3 2003/11/10 06:08:36 dillon Exp $
31 * PnP enumerator using the PCI BIOS.
35 #include <machine/stdarg.h>
36 #include <bootstrap.h>
41 * Stupid PCI BIOS interface doesn't let you simply enumerate everything
42 * that's there, instead you have to ask it if it has something.
44 * So we have to scan by class code, subclass code and sometimes programming
54 static struct pci_progif progif_null[] = {
59 static struct pci_progif progif_display[] = {
65 static struct pci_progif progif_ide[] = {
101 static struct pci_progif progif_serial[] = {
108 static struct pci_progif progif_parallel[] = {
110 {0x1, "Bidirectional"},
120 struct pci_progif *ps_progif; /* if set, use for programming interface value(s) */
123 static struct pci_subclass subclass_old[] = {
124 {0x0, "Old non-VGA", progif_null},
125 {0x1, "Old VGA", progif_null},
129 static struct pci_subclass subclass_mass[] = {
130 {0x0, "SCSI", progif_null},
131 {0x1, "IDE", progif_ide},
132 {0x2, "Floppy disk", progif_null},
133 {0x3, "IPI", progif_null},
134 {0x4, "RAID", progif_null},
135 {0x80, "mass storage", progif_null},
139 static struct pci_subclass subclass_net[] = {
140 {0x0, "Ethernet", progif_null},
141 {0x1, "Token ring", progif_null},
142 {0x2, "FDDI", progif_null},
143 {0x3, "ATM", progif_null},
144 {0x80, "network", progif_null},
148 static struct pci_subclass subclass_display[] = {
149 {0x0, NULL, progif_display},
150 {0x1, "XGA", progif_null},
151 {0x80, "other", progif_null},
155 static struct pci_subclass subclass_comms[] = {
156 {0x0, "serial", progif_serial},
157 {0x1, "parallel", progif_parallel},
158 {0x80, "communications", progif_null},
162 static struct pci_subclass subclass_serial[] = {
163 {0x0, "Firewire", progif_null},
164 {0x1, "ACCESS.bus", progif_null},
165 {0x2, "SSA", progif_null},
166 {0x3, "USB", progif_null},
167 {0x4, "Fibrechannel", progif_null},
171 static struct pci_class
175 struct pci_subclass *pc_subclass;
177 {0x0, "device", subclass_old},
178 {0x1, "controller", subclass_mass},
179 {0x2, "controller", subclass_net},
180 {0x3, "display", subclass_display},
181 {0x7, "controller", subclass_comms},
182 {0xc, "controller", subclass_serial},
187 static void biospci_enumerate(void);
188 static void biospci_addinfo(int devid, struct pci_class *pc, struct pci_subclass *psc, struct pci_progif *ppi);
190 static int biospci_version;
191 static int biospci_hwcap;
193 struct pnphandler biospcihandler =
200 biospci_enumerate(void)
202 int device_index, locator, devid;
203 struct pci_class *pc;
204 struct pci_subclass *psc;
205 struct pci_progif *ppi;
207 /* Find the PCI BIOS */
214 /* Check for OK response */
215 if ((v86.efl & 1) || ((v86.eax & 0xff00) != 0) || (v86.edx != 0x20494350))
218 biospci_version = v86.ebx & 0xffff;
219 biospci_hwcap = v86.eax & 0xff;
221 printf("PCI BIOS %d.%d%s%s\n",
222 bcd2bin((biospci_version >> 8) & 0xf), bcd2bin(biospci_version & 0xf),
223 (biospci_hwcap & 1) ? " config1" : "", (biospci_hwcap & 2) ? " config2" : "");
225 /* Iterate over known classes */
226 for (pc = pci_classes; pc->pc_class >= 0; pc++) {
227 /* Iterate over subclasses */
228 for (psc = pc->pc_subclass; psc->ps_subclass >= 0; psc++) {
229 /* Iterate over programming interfaces */
230 for (ppi = psc->ps_progif; ppi->pi_code >= 0; ppi++) {
232 /* Scan for matches */
233 for (device_index = 0; ; device_index++) {
235 /* Look for a match */
239 v86.ecx = (pc->pc_class << 16) + (psc->ps_subclass << 8) + ppi->pi_code;
240 v86.esi = device_index;
242 /* error/end of matches */
243 if ((v86.efl & 1) || (v86.eax & 0xff00))
249 /* Read the device identifier from the nominated device */
257 if ((v86.efl & 1) || (v86.eax & 0xff00))
260 /* We have the device ID, create a PnP object and save everything */
262 biospci_addinfo(devid, pc, psc, ppi);
270 biospci_addinfo(int devid, struct pci_class *pc, struct pci_subclass *psc, struct pci_progif *ppi)
276 /* build the description */
278 if (ppi->pi_name != NULL) {
279 strcat(desc, ppi->pi_name);
282 if (psc->ps_name != NULL) {
283 strcat(desc, psc->ps_name);
286 if (pc->pc_name != NULL)
287 strcat(desc, pc->pc_name);
289 pi = pnp_allocinfo();
290 pi->pi_desc = strdup(desc);
291 sprintf(desc,"0x%08x", devid);
292 pnp_addident(pi, desc);