0c6bf9beea
Modify the main ACPI namespace scan by including a parent-child relationship for each node. The result is a bi-directional tree. ok jmcneill@
263 lines
6.5 KiB
C
263 lines
6.5 KiB
C
/* $NetBSD: acpi_wakedev.c,v 1.12 2010/04/18 14:05:26 jruoho Exp $ */
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/*-
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* Copyright (c) 2009, 2010 Jared D. McNeill <jmcneill@invisible.ca>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: acpi_wakedev.c,v 1.12 2010/04/18 14:05:26 jruoho Exp $");
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#include <sys/param.h>
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#include <sys/device.h>
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#include <sys/sysctl.h>
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#include <sys/systm.h>
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#include <dev/acpi/acpireg.h>
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#include <dev/acpi/acpivar.h>
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#include <dev/acpi/acpi_wakedev.h>
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#define _COMPONENT ACPI_BUS_COMPONENT
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ACPI_MODULE_NAME ("acpi_wakedev")
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static const char * const acpi_wakedev_default[] = {
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"PNP0C0C", /* power button */
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"PNP0C0E", /* sleep button */
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"PNP0C0D", /* lid switch */
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"PNP03??", /* PC KBD port */
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NULL,
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};
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static const struct sysctlnode *rnode = NULL;
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static void acpi_wakedev_prepare(struct acpi_devnode *, int, int);
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static void acpi_wakedev_gpe(struct acpi_devnode *, int);
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SYSCTL_SETUP(sysctl_acpi_wakedev_setup, "sysctl hw.acpi.wake subtree setup")
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{
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int err;
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err = sysctl_createv(NULL, 0, NULL, &rnode,
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CTLFLAG_PERMANENT, CTLTYPE_NODE, "hw",
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NULL, NULL, 0, NULL, 0,
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CTL_HW, CTL_EOL);
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if (err != 0)
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goto fail;
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err = sysctl_createv(NULL, 0, &rnode, &rnode,
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CTLFLAG_PERMANENT, CTLTYPE_NODE, "acpi",
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NULL, NULL, 0, NULL, 0,
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CTL_CREATE, CTL_EOL);
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if (err != 0)
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goto fail;
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err = sysctl_createv(NULL, 0, &rnode, &rnode,
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CTLFLAG_PERMANENT, CTLTYPE_NODE,
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"wake", SYSCTL_DESCR("ACPI device wake-up"),
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NULL, 0, NULL, 0,
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CTL_CREATE, CTL_EOL);
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if (err != 0)
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goto fail;
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return;
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fail:
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rnode = NULL;
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}
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void
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acpi_wakedev_add(struct acpi_devnode *ad)
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{
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int err;
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KASSERT(ad != NULL && ad->ad_root != NULL);
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KASSERT((ad->ad_flags & ACPI_DEVICE_WAKEUP) != 0);
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ad->ad_wake = 0;
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if (acpi_match_hid(ad->ad_devinfo, acpi_wakedev_default))
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ad->ad_wake = 1;
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if (rnode == NULL)
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return;
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err = sysctl_createv(NULL, 0, &rnode, NULL,
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CTLFLAG_READWRITE, CTLTYPE_BOOL, ad->ad_name,
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NULL, NULL, 0, &ad->ad_wake, 0,
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CTL_CREATE, CTL_EOL);
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if (err != 0)
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aprint_error_dev(ad->ad_root, "sysctl_createv"
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"(hw.acpi.wake.%s) failed (err %d)\n", ad->ad_name, err);
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}
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void
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acpi_wakedev_commit(struct acpi_softc *sc, int state)
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{
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struct acpi_devnode *ad;
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/*
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* As noted in ACPI 3.0 (p. 243), preparing
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* a device for wakeup is a two-step process:
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*
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* 1. Enable all power resources in _PRW.
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*
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* 2. If present, execute _DSW/_PSW method.
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*
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* XXX: The first one is yet to be implemented.
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*/
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SIMPLEQ_FOREACH(ad, &sc->ad_head, ad_list) {
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if ((ad->ad_flags & ACPI_DEVICE_WAKEUP) == 0)
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continue;
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acpi_wakedev_gpe(ad, ad->ad_wake);
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acpi_wakedev_prepare(ad, ad->ad_wake, state);
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}
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}
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static void
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acpi_wakedev_prepare(struct acpi_devnode *ad, int enable, int state)
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{
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ACPI_OBJECT_LIST arg;
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ACPI_OBJECT obj[3];
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ACPI_STATUS rv;
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/*
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* First try to call the Device Sleep Wake control method, _DSW.
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* Only if this is not available, resort to to the Power State
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* Wake control method, _PSW, which was deprecated in ACPI 3.0.
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*
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* The arguments to these methods are as follows:
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*
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* arg0 arg1 arg2
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* ---- ---- ----
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* _PSW 0: disable
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* 1: enable
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*
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* _DSW 0: disable 0: S0 0: D0
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* 1: enable 1: S1 1: D0 or D1
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* 2: D0, D1, or D2
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* x: Sx 3: D0, D1, D2 or D3
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*/
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arg.Count = 3;
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arg.Pointer = obj;
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obj[0].Integer.Value = enable;
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obj[1].Integer.Value = state;
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obj[2].Integer.Value = 3;
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obj[0].Type = obj[1].Type = obj[2].Type = ACPI_TYPE_INTEGER;
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rv = AcpiEvaluateObject(ad->ad_handle, "_DSW", &arg, NULL);
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if (ACPI_SUCCESS(rv))
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return;
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if (rv != AE_NOT_FOUND)
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goto fail;
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rv = acpi_eval_set_integer(ad->ad_handle, "_PSW", enable);
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if (ACPI_FAILURE(rv) && rv != AE_NOT_FOUND)
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goto fail;
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return;
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fail:
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aprint_error_dev(ad->ad_root, "failed to evaluate wake "
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"control method: %s\n", AcpiFormatException(rv));
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}
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static void
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acpi_wakedev_gpe(struct acpi_devnode *ad, int enable)
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{
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ACPI_OBJECT *elm, *obj;
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ACPI_INTEGER val;
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ACPI_BUFFER buf;
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ACPI_STATUS rv;
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rv = acpi_eval_struct(ad->ad_handle, METHOD_NAME__PRW, &buf);
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if (ACPI_FAILURE(rv))
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return;
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obj = buf.Pointer;
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if (obj->Type != ACPI_TYPE_PACKAGE || obj->Package.Count < 2)
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goto out;
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/*
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* As noted in ACPI 3.0 (section 7.2.10), the _PRW object is
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* a package in which the first element is either an integer
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* or again a package. In the latter case the package inside
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* the package element has two elements, a reference handle
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* and the GPE number.
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*/
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elm = &obj->Package.Elements[0];
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switch (elm->Type) {
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case ACPI_TYPE_INTEGER:
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val = elm->Integer.Value;
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break;
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case ACPI_TYPE_PACKAGE:
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if (elm->Package.Count < 2)
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goto out;
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if (elm->Package.Elements[0].Type != ACPI_TYPE_LOCAL_REFERENCE)
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goto out;
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if (elm->Package.Elements[1].Type != ACPI_TYPE_INTEGER)
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goto out;
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val = elm->Package.Elements[1].Integer.Value;
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break;
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default:
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goto out;
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}
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/*
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* Set or unset a GPE as both runtime and wake.
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*/
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if (enable == 0)
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(void)AcpiDisableGpe(NULL, val, ACPI_NOT_ISR);
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else {
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(void)AcpiSetGpeType(NULL, val, ACPI_GPE_TYPE_WAKE_RUN);
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(void)AcpiEnableGpe(NULL, val, ACPI_NOT_ISR);
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}
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ACPI_DEBUG_PRINT((ACPI_DB_INFO, "wake GPE %s for %s\n",
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(enable != 0) ? "enabled" : "disabled", ad->ad_name));
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out:
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ACPI_FREE(buf.Pointer);
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}
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