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/*-
* Copyright (c) 2004 Nate Lawson (SDG)
* 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("$FreeBSD$");
#include <sys/param.h>
#include <sys/bus.h>
#include <contrib/dev/acpica/include/acpi.h>
#include <dev/acpica/acpivar.h>
enum ops_t {
OP_NONE,
OP_LEQ,
OP_GEQ,
OP_EQL,
};
enum val_t {
OEM,
OEM_REV,
CREATOR,
CREATOR_REV,
};
struct acpi_q_rule {
char sig[ACPI_NAME_SIZE]; /* Table signature to match */
enum val_t val;
union {
char *id;
enum ops_t op;
} x;
union {
char *tid;
int rev;
} y;
};
struct acpi_q_entry {
const struct acpi_q_rule *match;
int quirks;
};
#include "acpi_quirks.h"
static int aq_revcmp(int revision, enum ops_t op, int value);
static int aq_strcmp(char *actual, char *possible);
static int aq_match_header(ACPI_TABLE_HEADER *hdr,
const struct acpi_q_rule *match);
static int
aq_revcmp(int revision, enum ops_t op, int value)
{
switch (op) {
case OP_LEQ:
if (revision <= value)
return (TRUE);
break;
case OP_GEQ:
if (revision >= value)
return (TRUE);
break;
case OP_EQL:
if (revision == value)
return (TRUE);
break;
case OP_NONE:
return (TRUE);
default:
panic("aq_revcmp: invalid op %d", op);
}
return (FALSE);
}
static int
aq_strcmp(char *actual, char *possible)
{
if (actual == NULL || possible == NULL)
return (TRUE);
return (strncmp(actual, possible, strlen(possible)) == 0);
}
static int
aq_match_header(ACPI_TABLE_HEADER *hdr, const struct acpi_q_rule *match)
{
int result;
result = FALSE;
switch (match->val) {
case OEM:
if (aq_strcmp(hdr->OemId, match->x.id) &&
aq_strcmp(hdr->OemTableId, match->y.tid))
result = TRUE;
break;
case CREATOR:
if (aq_strcmp(hdr->AslCompilerId, match->x.id))
result = TRUE;
break;
case OEM_REV:
if (aq_revcmp(hdr->OemRevision, match->x.op, match->y.rev))
result = TRUE;
break;
case CREATOR_REV:
if (aq_revcmp(hdr->AslCompilerRevision, match->x.op, match->y.rev))
result = TRUE;
break;
}
return (result);
}
int
acpi_table_quirks(int *quirks)
{
const struct acpi_q_entry *entry;
const struct acpi_q_rule *match;
ACPI_TABLE_HEADER fadt, dsdt, xsdt, *hdr;
int done;
/* First, allow the machdep system to set its idea of quirks. */
KASSERT(quirks != NULL, ("acpi quirks ptr is NULL"));
acpi_machdep_quirks(quirks);
if (ACPI_FAILURE(AcpiGetTableHeader(ACPI_SIG_FADT, 0, &fadt)))
bzero(&fadt, sizeof(fadt));
if (ACPI_FAILURE(AcpiGetTableHeader(ACPI_SIG_DSDT, 0, &dsdt)))
bzero(&dsdt, sizeof(dsdt));
if (ACPI_FAILURE(AcpiGetTableHeader(ACPI_SIG_XSDT, 0, &xsdt)))
bzero(&xsdt, sizeof(xsdt));
/* Then, override the quirks with any matched from table signatures. */
for (entry = acpi_quirks_table; entry->match; entry++) {
done = TRUE;
for (match = entry->match; match->sig[0] != '\0'; match++) {
if (!strncmp(match->sig, "FADT", ACPI_NAME_SIZE))
hdr = &fadt;
else if (!strncmp(match->sig, ACPI_SIG_DSDT, ACPI_NAME_SIZE))
hdr = &dsdt;
else if (!strncmp(match->sig, ACPI_SIG_XSDT, ACPI_NAME_SIZE))
hdr = &xsdt;
else
panic("invalid quirk header\n");
/* If we don't match any, skip to the next entry. */
if (aq_match_header(hdr, match) == FALSE) {
done = FALSE;
break;
}
}
/* If all entries matched, update the quirks and return. */
if (done) {
*quirks = entry->quirks;
break;
}
}
return (0);
}
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