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acpi_quirks.c revision 1.11 
      1 /*	$NetBSD: acpi_quirks.c,v 1.11 2010/03/05 14:00:17 jruoho 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 1.11 2010/03/05 14:00:17 jruoho 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 static int acpi_rev_cmp(uint32_t, uint32_t, int);
     51 
     52 /*
     53  * XXX add more
     54  */
     55 static struct acpi_quirk acpi_quirks[] = {
     56 	{ ACPI_SIG_FADT, "PTLTD ", 0x06040000, AQ_LTE, "  FACP  ",
     57 	  ACPI_QUIRK_BROKEN },
     58 	{ ACPI_SIG_FADT, "NVIDIA", 0x06040000, AQ_EQ, "CK8     ",
     59 	  ACPI_QUIRK_IRQ0 },
     60 	{ ACPI_SIG_FADT, "HP    ", 0x06040012, AQ_LTE, "HWPC20F ",
     61 	  ACPI_QUIRK_BROKEN },
     62 };
     63 
     64 static int
     65 acpi_rev_cmp(uint32_t tabval, uint32_t wanted, int op)
     66 {
     67 	switch (op) {
     68 	case AQ_GT:
     69 		if (tabval > wanted)
     70 			return 0;
     71 		else
     72 			return 1;
     73 	case AQ_LT:
     74 		if (tabval < wanted)
     75 			return 0;
     76 		else
     77 			return 1;
     78 	case AQ_LTE:
     79 		if (tabval <= wanted)
     80 			return 0;
     81 		else
     82 			return 1;
     83 	case AQ_GTE:
     84 		if (tabval >= wanted)
     85 			return 0;
     86 		else
     87 			return 1;
     88 	case AQ_EQ:
     89 		if (tabval == wanted)
     90 			return 0;
     91 		else
     92 			return 1;
     93 	}
     94 	return 1;
     95 }
     96 
     97 /*
     98  * Simple function to search the quirk table. Only to be used after
     99  * AcpiLoadTables has been successfully called.
    100  */
    101 int
    102 acpi_find_quirks(void)
    103 {
    104 	int i, nquirks;
    105 	struct acpi_quirk *aqp;
    106 	ACPI_TABLE_HEADER fadt, dsdt, xsdt, *hdr;
    107 
    108 	nquirks = sizeof(acpi_quirks) / sizeof(struct acpi_quirk);
    109 
    110 	if (ACPI_FAILURE(AcpiGetTableHeader(ACPI_SIG_FADT, 0, &fadt)))
    111 		memset(&fadt, 0, sizeof(fadt));
    112 	if (ACPI_FAILURE(AcpiGetTableHeader(ACPI_SIG_DSDT, 0, &dsdt)))
    113 		memset(&dsdt, 0, sizeof(dsdt));
    114 	if (ACPI_FAILURE(AcpiGetTableHeader(ACPI_SIG_XSDT, 0, &xsdt)))
    115 		memset(&xsdt, 0, sizeof(xsdt));
    116 
    117 	for (i = 0; i < nquirks; i++) {
    118 		aqp = &acpi_quirks[i];
    119 		if (!strncmp(aqp->aq_tabletype, ACPI_SIG_DSDT, 4))
    120 			hdr = &dsdt;
    121 		else if (!strncmp(aqp->aq_tabletype, ACPI_SIG_XSDT, 4))
    122 			hdr = &xsdt;
    123 		else if (!strncmp(aqp->aq_tabletype, ACPI_SIG_FADT, 4))
    124 			hdr = &fadt;
    125 		else
    126 			continue;
    127 		if (strncmp(aqp->aq_oemid, hdr->OemId, strlen(aqp->aq_oemid)))
    128 			continue;
    129 		if (acpi_rev_cmp(aqp->aq_oemrev, hdr->OemRevision,
    130 		    aqp->aq_cmpop))
    131 			continue;
    132 		if (strncmp(aqp->aq_tabid, hdr->OemTableId,
    133 		    strlen(aqp->aq_tabid)))
    134 			continue;
    135 		return aqp->aq_quirks;
    136 	}
    137 	return 0;
    138 }
    139