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/*-
* Copyright (c) 1998 Michael Smith <msmith@freebsd.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: release/9.1.0/sys/boot/i386/libi386/biospci.c 230257 2012-01-17 06:40:41Z kib $");
/*
* PnP enumerator using the PCI BIOS.
*/
#include <stand.h>
#include <machine/stdarg.h>
#include <bootstrap.h>
#include <isapnp.h>
#include <btxv86.h>
#include "libi386.h"
/*
* Stupid PCI BIOS interface doesn't let you simply enumerate everything
* that's there, instead you have to ask it if it has something.
*
* So we have to scan by class code, subclass code and sometimes programming
* interface.
*/
struct pci_progif
{
int pi_code;
const char *pi_name;
};
static struct pci_progif progif_null[] = {
{0x0, NULL},
{-1, NULL}
};
static struct pci_progif progif_display[] = {
{0x0, "VGA"},
{0x1, "8514"},
{-1, NULL}
};
static struct pci_progif progif_ide[] = {
{0x00, NULL},
{0x01, NULL},
{0x02, NULL},
{0x03, NULL},
{0x04, NULL},
{0x05, NULL},
{0x06, NULL},
{0x07, NULL},
{0x08, NULL},
{0x09, NULL},
{0x0a, NULL},
{0x0b, NULL},
{0x0c, NULL},
{0x0d, NULL},
{0x0e, NULL},
{0x0f, NULL},
{0x80, NULL},
{0x81, NULL},
{0x82, NULL},
{0x83, NULL},
{0x84, NULL},
{0x85, NULL},
{0x86, NULL},
{0x87, NULL},
{0x88, NULL},
{0x89, NULL},
{0x8a, NULL},
{0x8b, NULL},
{0x8c, NULL},
{0x8d, NULL},
{0x8e, NULL},
{0x8f, NULL},
{-1, NULL}
};
static struct pci_progif progif_serial[] = {
{0x0, "8250"},
{0x1, "16450"},
{0x2, "16550"},
{-1, NULL}
};
static struct pci_progif progif_parallel[] = {
{0x0, "Standard"},
{0x1, "Bidirectional"},
{0x2, "ECP"},
{-1, NULL}
};
static struct pci_progif progif_firewire[] = {
{0x10, "OHCI"},
{-1, NULL}
};
struct pci_subclass
{
int ps_subclass;
const char *ps_name;
struct pci_progif *ps_progif; /* if set, use for programming interface value(s) */
};
static struct pci_subclass subclass_old[] = {
{0x0, "Old non-VGA", progif_null},
{0x1, "Old VGA", progif_null},
{-1, NULL, NULL}
};
static struct pci_subclass subclass_mass[] = {
{0x0, "SCSI", progif_null},
{0x1, "IDE", progif_ide},
{0x2, "Floppy disk", progif_null},
{0x3, "IPI", progif_null},
{0x4, "RAID", progif_null},
{0x80, "mass storage", progif_null},
{-1, NULL, NULL}
};
static struct pci_subclass subclass_net[] = {
{0x0, "Ethernet", progif_null},
{0x1, "Token ring", progif_null},
{0x2, "FDDI", progif_null},
{0x3, "ATM", progif_null},
{0x80, "network", progif_null},
{-1, NULL, NULL}
};
static struct pci_subclass subclass_display[] = {
{0x0, NULL, progif_display},
{0x1, "XGA", progif_null},
{0x80, "other", progif_null},
{-1, NULL, NULL}
};
static struct pci_subclass subclass_comms[] = {
{0x0, "serial", progif_serial},
{0x1, "parallel", progif_parallel},
{0x80, "communications", progif_null},
{-1, NULL, NULL}
};
static struct pci_subclass subclass_serial[] = {
{0x0, "FireWire", progif_firewire},
{0x1, "ACCESS.bus", progif_null},
{0x2, "SSA", progif_null},
{0x3, "USB", progif_null},
{0x4, "Fibrechannel", progif_null},
{-1, NULL, NULL}
};
static struct pci_class
{
int pc_class;
const char *pc_name;
struct pci_subclass *pc_subclass;
} pci_classes[] = {
{0x0, "device", subclass_old},
{0x1, "controller", subclass_mass},
{0x2, "controller", subclass_net},
{0x3, "display", subclass_display},
{0x7, "controller", subclass_comms},
{0xc, "controller", subclass_serial},
{-1, NULL, NULL}
};
static void biospci_enumerate(void);
static void biospci_addinfo(int devid, struct pci_class *pc, struct pci_subclass *psc, struct pci_progif *ppi);
static int biospci_version;
static int biospci_hwcap;
struct pnphandler biospcihandler =
{
"PCI BIOS",
biospci_enumerate
};
static void
biospci_enumerate(void)
{
int device_index, err;
uint32_t locator, devid;
struct pci_class *pc;
struct pci_subclass *psc;
struct pci_progif *ppi;
/* Find the PCI BIOS */
v86.ctl = V86_FLAGS;
v86.addr = 0x1a;
v86.eax = 0xb101;
v86.edi = 0x0;
v86int();
/* Check for OK response */
if (V86_CY(v86.efl) || ((v86.eax & 0xff00) != 0) ||
(v86.edx != 0x20494350))
return;
biospci_version = v86.ebx & 0xffff;
biospci_hwcap = v86.eax & 0xff;
#if 0
printf("PCI BIOS %d.%d%s%s\n",
bcd2bin((biospci_version >> 8) & 0xf), bcd2bin(biospci_version & 0xf),
(biospci_hwcap & 1) ? " config1" : "", (biospci_hwcap & 2) ? " config2" : "");
#endif
/* Iterate over known classes */
for (pc = pci_classes; pc->pc_class >= 0; pc++) {
/* Iterate over subclasses */
for (psc = pc->pc_subclass; psc->ps_subclass >= 0; psc++) {
/* Iterate over programming interfaces */
for (ppi = psc->ps_progif; ppi->pi_code >= 0; ppi++) {
/* Scan for matches */
for (device_index = 0; ; device_index++) {
/* Look for a match */
err = biospci_find_devclass((pc->pc_class << 16)
+ (psc->ps_subclass << 8) + ppi->pi_code,
device_index, &locator);
if (err != 0)
break;
/* Read the device identifier from the nominated device */
err = biospci_read_config(locator, 0, 2, &devid);
if (err != 0)
break;
/* We have the device ID, create a PnP object and save everything */
biospci_addinfo(devid, pc, psc, ppi);
}
}
}
}
}
static void
biospci_addinfo(int devid, struct pci_class *pc, struct pci_subclass *psc, struct pci_progif *ppi)
{
struct pnpinfo *pi;
char desc[80];
/* build the description */
desc[0] = 0;
if (ppi->pi_name != NULL) {
strcat(desc, ppi->pi_name);
strcat(desc, " ");
}
if (psc->ps_name != NULL) {
strcat(desc, psc->ps_name);
strcat(desc, " ");
}
if (pc->pc_name != NULL)
strcat(desc, pc->pc_name);
pi = pnp_allocinfo();
pi->pi_desc = strdup(desc);
sprintf(desc,"0x%08x", devid);
pnp_addident(pi, desc);
pnp_addinfo(pi);
}
int
biospci_find_devclass(uint32_t class, int index, uint32_t *locator)
{
v86.ctl = V86_FLAGS;
v86.addr = 0x1a;
v86.eax = 0xb103;
v86.ecx = class;
v86.esi = index;
v86int();
/* error */
if (V86_CY(v86.efl) || (v86.eax & 0xff00))
return (-1);
*locator = v86.ebx;
return (0);
}
/*
* Configuration space access methods.
* width = 0(byte), 1(word) or 2(dword).
*/
int
biospci_write_config(uint32_t locator, int offset, int width, uint32_t val)
{
v86.ctl = V86_FLAGS;
v86.addr = 0x1a;
v86.eax = 0xb10b + width;
v86.ebx = locator;
v86.edi = offset;
v86.ecx = val;
v86int();
/* error */
if (V86_CY(v86.efl) || (v86.eax & 0xff00))
return (-1);
return(0);
}
int
biospci_read_config(uint32_t locator, int offset, int width, uint32_t *val)
{
v86.ctl = V86_FLAGS;
v86.addr = 0x1a;
v86.eax = 0xb108 + width;
v86.ebx = locator;
v86.edi = offset;
v86int();
/* error */
if (V86_CY(v86.efl) || (v86.eax & 0xff00))
return (-1);
*val = v86.ecx;
return (0);
}
uint32_t
biospci_locator(int8_t bus, uint8_t device, uint8_t function)
{
return ((bus << 8) | ((device & 0x1f) << 3) | (function & 0x7));
}