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acpi_quirks.c revision 1.18 
      1 /*	$NetBSD: acpi_quirks.c,v 1.18 2010/09/06 15:54:27 jmcneill Exp $	*/
      2 
      3 /*
      4  * Copyright 2002 Wasabi Systems, Inc.
      5  * All rights reserved.
      6  *
      7  * Written by Frank van der Linden for Wasabi Systems, Inc.
      8  *
      9  * Redistribution and use in source and binary forms, with or without
     10  * modification, are permitted provided that the following conditions
     11  * are met:
     12  * 1. Redistributions of source code must retain the above copyright
     13  *    notice, this list of conditions and the following disclaimer.
     14  * 2. Redistributions in binary form must reproduce the above copyright
     15  *    notice, this list of conditions and the following disclaimer in the
     16  *    documentation and/or other materials provided with the distribution.
     17  * 3. All advertising materials mentioning features or use of this software
     18  *    must display the following acknowledgement:
     19  *      This product includes software developed for the NetBSD Project by
     20  *      Wasabi Systems, Inc.
     21  * 4. The name of Wasabi Systems, Inc. may not be used to endorse
     22  *    or promote products derived from this software without specific prior
     23  *    written permission.
     24  *
     25  * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
     26  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     27  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     28  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL WASABI SYSTEMS, INC
     29  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     30  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     31  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     32  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     33  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     34  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     35  * POSSIBILITY OF SUCH DAMAGE.
     36  */
     37 
     38 #include <sys/cdefs.h>
     39 
     40 __KERNEL_RCSID(0, "$NetBSD: acpi_quirks.c,v 1.18 2010/09/06 15:54:27 jmcneill Exp $");
     41 
     42 #include "opt_acpi.h"
     43 
     44 #include <sys/param.h>
     45 #include <sys/systm.h>
     46 #include <sys/kernel.h>
     47 
     48 #include <dev/acpi/acpivar.h>
     49 
     50 #define AQ_GT		0	/* > */
     51 #define AQ_LT		1	/* < */
     52 #define AQ_GTE		2	/* >= */
     53 #define AQ_LTE		3	/* <= */
     54 #define AQ_EQ		4	/* == */
     55 
     56 static int acpi_rev_cmp(uint32_t, uint32_t, int);
     57 
     58 /*
     59  * XXX: Add more.
     60  */
     61 static struct acpi_quirk acpi_quirks[] = {
     62 
     63 	{ ACPI_SIG_FADT, "ASUS  ", 0x30303031, AQ_LTE, "CUV4X-D ",
     64 	  ACPI_QUIRK_BROKEN },
     65 
     66 	{ ACPI_SIG_FADT, "PTLTD ", 0x06040000, AQ_LTE, "  FACP  ",
     67 	  ACPI_QUIRK_BROKEN },
     68 
     69 	{ ACPI_SIG_FADT, "NVIDIA", 0x06040000, AQ_EQ, "CK8     ",
     70 	  ACPI_QUIRK_IRQ0 },
     71 
     72 	{ ACPI_SIG_FADT, "HP    ", 0x06040012, AQ_LTE, "HWPC20F ",
     73 	  ACPI_QUIRK_BROKEN },
     74 };
     75 
     76 static int
     77 acpi_rev_cmp(uint32_t tabval, uint32_t wanted, int op)
     78 {
     79 	switch (op) {
     80 	case AQ_GT:
     81 		if (tabval > wanted)
     82 			return 0;
     83 		else
     84 			return 1;
     85 	case AQ_LT:
     86 		if (tabval < wanted)
     87 			return 0;
     88 		else
     89 			return 1;
     90 	case AQ_LTE:
     91 		if (tabval <= wanted)
     92 			return 0;
     93 		else
     94 			return 1;
     95 	case AQ_GTE:
     96 		if (tabval >= wanted)
     97 			return 0;
     98 		else
     99 			return 1;
    100 	case AQ_EQ:
    101 		if (tabval == wanted)
    102 			return 0;
    103 		else
    104 			return 1;
    105 	}
    106 	return 1;
    107 }
    108 
    109 #ifdef ACPI_BLACKLIST_YEAR
    110 static int
    111 acpi_find_bios_year(void)
    112 {
    113 	const char *datestr = pmf_get_platform("firmware-date");
    114 	unsigned long date;
    115 
    116 	if (datestr == NULL)
    117 		return -1;
    118 
    119 	date = strtoul(datestr, NULL, 10);
    120 	if (date == 0 || date == ULONG_MAX)
    121 		return -1;
    122 	if (date < 19000000 || date > 99999999)
    123 		return -1;
    124 	return date / 10000;
    125 }
    126 #endif
    127 
    128 /*
    129  * Simple function to search the quirk table. Only to be used after
    130  * AcpiLoadTables has been successfully called.
    131  */
    132 int
    133 acpi_find_quirks(void)
    134 {
    135 	int i, nquirks;
    136 	struct acpi_quirk *aqp;
    137 	ACPI_TABLE_HEADER fadt, dsdt, xsdt, *hdr;
    138 #ifdef ACPI_BLACKLIST_YEAR
    139 	int year = acpi_find_bios_year();
    140 
    141 	if (year != -1 && year <= ACPI_BLACKLIST_YEAR)
    142 		return ACPI_QUIRK_OLDBIOS;
    143 #endif
    144 
    145 	nquirks = __arraycount(acpi_quirks);
    146 
    147 	if (ACPI_FAILURE(AcpiGetTableHeader(ACPI_SIG_FADT, 0, &fadt)))
    148 		memset(&fadt, 0, sizeof(fadt));
    149 	if (ACPI_FAILURE(AcpiGetTableHeader(ACPI_SIG_DSDT, 0, &dsdt)))
    150 		memset(&dsdt, 0, sizeof(dsdt));
    151 	if (ACPI_FAILURE(AcpiGetTableHeader(ACPI_SIG_XSDT, 0, &xsdt)))
    152 		memset(&xsdt, 0, sizeof(xsdt));
    153 
    154 	for (i = 0; i < nquirks; i++) {
    155 		aqp = &acpi_quirks[i];
    156 		if (!strncmp(aqp->aq_tabletype, ACPI_SIG_DSDT, 4))
    157 			hdr = &dsdt;
    158 		else if (!strncmp(aqp->aq_tabletype, ACPI_SIG_XSDT, 4))
    159 			hdr = &xsdt;
    160 		else if (!strncmp(aqp->aq_tabletype, ACPI_SIG_FADT, 4))
    161 			hdr = &fadt;
    162 		else
    163 			continue;
    164 		if (strncmp(aqp->aq_oemid, hdr->OemId, strlen(aqp->aq_oemid)))
    165 			continue;
    166 		if (acpi_rev_cmp(aqp->aq_oemrev, hdr->OemRevision,
    167 		    aqp->aq_cmpop))
    168 			continue;
    169 		if (strncmp(aqp->aq_tabid, hdr->OemTableId,
    170 		    strlen(aqp->aq_tabid)))
    171 			continue;
    172 		return aqp->aq_quirks;
    173 	}
    174 	return 0;
    175 }
    176