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acpi_quirks.c revision 1.7 
      1 /*	$NetBSD: acpi_quirks.c,v 1.7 2006/07/04 00:30:23 christos 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 1.7 2006/07/04 00:30:23 christos 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_TABLE_FADT, "PTLTD ", 0x06040000, AQ_LTE, "  FACP  ",
     62 	  ACPI_QUIRK_BROKEN },
     63 };
     64 
     65 static int
     66 acpi_rev_cmp(uint32_t tabval, uint32_t wanted, int op)
     67 {
     68 	switch (op) {
     69 	case AQ_GT:
     70 		if (tabval > wanted)
     71 			return 0;
     72 		else
     73 			return 1;
     74 	case AQ_LT:
     75 		if (tabval < wanted)
     76 			return 0;
     77 		else
     78 			return 1;
     79 	case AQ_LTE:
     80 		if (tabval <= wanted)
     81 			return 0;
     82 		else
     83 			return 1;
     84 	case AQ_GTE:
     85 		if (tabval >= wanted)
     86 			return 0;
     87 		else
     88 			return 1;
     89 	case AQ_EQ:
     90 		if (tabval == wanted)
     91 			return 0;
     92 		else
     93 			return 1;
     94 	}
     95 	return 1;
     96 }
     97 
     98 /*
     99  * Simple function to search the quirk table. Only to be used after
    100  * AcpiLoadTables has been successfully called.
    101  */
    102 int
    103 acpi_find_quirks(void)
    104 {
    105 	int i, nquirks;
    106 	struct acpi_quirk *aqp;
    107 	ACPI_TABLE_HEADER *hdr;
    108 
    109 	nquirks = sizeof(acpi_quirks) / sizeof(struct acpi_quirk);
    110 
    111 	for (i = 0; i < nquirks; i++) {
    112 		aqp = &acpi_quirks[i];
    113 		/* XXX AcpiGetTableHeader doesn't work for some reason */
    114 		switch (aqp->aq_tabletype) {
    115 		case ACPI_TABLE_DSDT:
    116 			hdr = (ACPI_TABLE_HEADER *)AcpiGbl_DSDT;
    117 			break;
    118 		case ACPI_TABLE_XSDT:
    119 			hdr = (ACPI_TABLE_HEADER *)AcpiGbl_XSDT;
    120 			break;
    121 		case ACPI_TABLE_FADT:
    122 			hdr = (ACPI_TABLE_HEADER *)AcpiGbl_FADT;
    123 			break;
    124 		default:
    125 			continue;
    126 		}
    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