Home | History | Annotate | Line # | Download | only in acpi
acpi_quirks.c revision 1.9 
      1 /*	$NetBSD: acpi_quirks.c,v 1.9 2007/12/09 20:27:53 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 1.9 2007/12/09 20:27:53 jmcneill Exp $");
     41 
     42 #include "opt_acpi.h"
     43 
     44 #include <sys/param.h>
     45 #include <sys/systm.h>
     46 #include <sys/device.h>
     47 #include <sys/malloc.h>
     48 #include <sys/kernel.h>
     49 #include <sys/proc.h>
     50 
     51 #include <dev/acpi/acpica.h>
     52 #include <dev/acpi/acpireg.h>
     53 #include <dev/acpi/acpivar.h>
     54 
     55 static int acpi_rev_cmp(uint32_t, uint32_t, int);
     56 
     57 /*
     58  * XXX add more
     59  */
     60 static struct acpi_quirk acpi_quirks[] = {
     61 	{ ACPI_SIG_FADT, "PTLTD ", 0x06040000, AQ_LTE, "  FACP  ",
     62 	  ACPI_QUIRK_BROKEN },
     63 	{ ACPI_SIG_FADT, "NVIDIA", 0x06040000, AQ_EQ, "CK8     ",
     64 	  ACPI_QUIRK_IRQ0 },
     65 };
     66 
     67 static int
     68 acpi_rev_cmp(uint32_t tabval, uint32_t wanted, int op)
     69 {
     70 	switch (op) {
     71 	case AQ_GT:
     72 		if (tabval > wanted)
     73 			return 0;
     74 		else
     75 			return 1;
     76 	case AQ_LT:
     77 		if (tabval < wanted)
     78 			return 0;
     79 		else
     80 			return 1;
     81 	case AQ_LTE:
     82 		if (tabval <= wanted)
     83 			return 0;
     84 		else
     85 			return 1;
     86 	case AQ_GTE:
     87 		if (tabval >= wanted)
     88 			return 0;
     89 		else
     90 			return 1;
     91 	case AQ_EQ:
     92 		if (tabval == wanted)
     93 			return 0;
     94 		else
     95 			return 1;
     96 	}
     97 	return 1;
     98 }
     99 
    100 /*
    101  * Simple function to search the quirk table. Only to be used after
    102  * AcpiLoadTables has been successfully called.
    103  */
    104 int
    105 acpi_find_quirks(void)
    106 {
    107 	int i, nquirks;
    108 	struct acpi_quirk *aqp;
    109 	ACPI_TABLE_HEADER fadt, dsdt, xsdt, *hdr;
    110 
    111 	nquirks = sizeof(acpi_quirks) / sizeof(struct acpi_quirk);
    112 
    113 	if (ACPI_FAILURE(AcpiGetTableHeader(ACPI_SIG_FADT, 0, &fadt)))
    114 		memset(&fadt, 0, sizeof(fadt));
    115 	if (ACPI_FAILURE(AcpiGetTableHeader(ACPI_SIG_DSDT, 0, &dsdt)))
    116 		memset(&dsdt, 0, sizeof(dsdt));
    117 	if (ACPI_FAILURE(AcpiGetTableHeader(ACPI_SIG_XSDT, 0, &xsdt)))
    118 		memset(&xsdt, 0, sizeof(xsdt));
    119 
    120 	for (i = 0; i < nquirks; i++) {
    121 		aqp = &acpi_quirks[i];
    122 		if (!strncmp(aqp->aq_tabletype, ACPI_SIG_DSDT, 4))
    123 			hdr = &dsdt;
    124 		else if (!strncmp(aqp->aq_tabletype, ACPI_SIG_XSDT, 4))
    125 			hdr = &xsdt;
    126 		else if (!strncmp(aqp->aq_tabletype, ACPI_SIG_FADT, 4))
    127 			hdr = &fadt;
    128 		else
    129 			continue;
    130 		if (strncmp(aqp->aq_oemid, hdr->OemId, strlen(aqp->aq_oemid)))
    131 			continue;
    132 		if (acpi_rev_cmp(aqp->aq_oemrev, hdr->OemRevision,
    133 		    aqp->aq_cmpop))
    134 			continue;
    135 		if (strncmp(aqp->aq_tabid, hdr->OemTableId,
    136 		    strlen(aqp->aq_tabid)))
    137 			continue;
    138 		return aqp->aq_quirks;
    139 	}
    140 	return 0;
    141 }
    142