796 lines
24 KiB
C
796 lines
24 KiB
C
/* $NetBSD: acpi_ec.c,v 1.3 2001/11/13 13:01:57 lukem Exp $ */
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/*
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* Copyright 2001 Wasabi Systems, Inc.
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* All rights reserved.
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*
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* Written by Jason R. Thorpe for Wasabi Systems, Inc.
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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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed for the NetBSD Project by
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* Wasabi Systems, Inc.
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* 4. The name of Wasabi Systems, Inc. may not be used to endorse
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* or promote products derived from this software without specific prior
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* written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
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* 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 WASABI SYSTEMS, INC
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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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/*-
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* Copyright (c) 2000 Michael Smith
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* Copyright (c) 2000 BSDi
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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 AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/******************************************************************************
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*
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* 1. Copyright Notice
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*
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* Some or all of this work - Copyright (c) 1999, Intel Corp. All rights
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* reserved.
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*
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* 2. License
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*
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* 2.1. This is your license from Intel Corp. under its intellectual property
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* rights. You may have additional license terms from the party that provided
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* you this software, covering your right to use that party's intellectual
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* property rights.
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*
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* 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
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* copy of the source code appearing in this file ("Covered Code") an
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* irrevocable, perpetual, worldwide license under Intel's copyrights in the
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* base code distributed originally by Intel ("Original Intel Code") to copy,
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* make derivatives, distribute, use and display any portion of the Covered
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* Code in any form, with the right to sublicense such rights; and
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*
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* 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
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* license (with the right to sublicense), under only those claims of Intel
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* patents that are infringed by the Original Intel Code, to make, use, sell,
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* offer to sell, and import the Covered Code and derivative works thereof
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* solely to the minimum extent necessary to exercise the above copyright
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* license, and in no event shall the patent license extend to any additions
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* to or modifications of the Original Intel Code. No other license or right
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* is granted directly or by implication, estoppel or otherwise;
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*
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* The above copyright and patent license is granted only if the following
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* conditions are met:
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*
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* 3. Conditions
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*
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* 3.1. Redistribution of Source with Rights to Further Distribute Source.
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* Redistribution of source code of any substantial portion of the Covered
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* Code or modification with rights to further distribute source must include
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* the above Copyright Notice, the above License, this list of Conditions,
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* and the following Disclaimer and Export Compliance provision. In addition,
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* Licensee must cause all Covered Code to which Licensee contributes to
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* contain a file documenting the changes Licensee made to create that Covered
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* Code and the date of any change. Licensee must include in that file the
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* documentation of any changes made by any predecessor Licensee. Licensee
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* must include a prominent statement that the modification is derived,
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* directly or indirectly, from Original Intel Code.
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*
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* 3.2. Redistribution of Source with no Rights to Further Distribute Source.
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* Redistribution of source code of any substantial portion of the Covered
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* Code or modification without rights to further distribute source must
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* include the following Disclaimer and Export Compliance provision in the
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* documentation and/or other materials provided with distribution. In
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* addition, Licensee may not authorize further sublicense of source of any
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* portion of the Covered Code, and must include terms to the effect that the
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* license from Licensee to its licensee is limited to the intellectual
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* property embodied in the software Licensee provides to its licensee, and
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* not to intellectual property embodied in modifications its licensee may
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* make.
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*
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* 3.3. Redistribution of Executable. Redistribution in executable form of any
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* substantial portion of the Covered Code or modification must reproduce the
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* above Copyright Notice, and the following Disclaimer and Export Compliance
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* provision in the documentation and/or other materials provided with the
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* distribution.
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*
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* 3.4. Intel retains all right, title, and interest in and to the Original
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* Intel Code.
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*
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* 3.5. Neither the name Intel nor any other trademark owned or controlled by
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* Intel shall be used in advertising or otherwise to promote the sale, use or
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* other dealings in products derived from or relating to the Covered Code
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* without prior written authorization from Intel.
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*
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* 4. Disclaimer and Export Compliance
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*
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* 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
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* HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
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* IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
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* INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
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* UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
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* IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
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* PARTICULAR PURPOSE.
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*
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* 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
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* OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
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* COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
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* SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
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* CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
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* HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
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* SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
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* LIMITED REMEDY.
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*
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* 4.3. Licensee shall not export, either directly or indirectly, any of this
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* software or system incorporating such software without first obtaining any
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* required license or other approval from the U. S. Department of Commerce or
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* any other agency or department of the United States Government. In the
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* event Licensee exports any such software from the United States or
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* re-exports any such software from a foreign destination, Licensee shall
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* ensure that the distribution and export/re-export of the software is in
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* compliance with all laws, regulations, orders, or other restrictions of the
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* U.S. Export Administration Regulations. Licensee agrees that neither it nor
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* any of its subsidiaries will export/re-export any technical data, process,
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* software, or service, directly or indirectly, to any country for which the
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* United States government or any agency thereof requires an export license,
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* other governmental approval, or letter of assurance, without first obtaining
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* such license, approval or letter.
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*
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*****************************************************************************/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: acpi_ec.c,v 1.3 2001/11/13 13:01:57 lukem Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/device.h>
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#include <sys/proc.h>
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#include <sys/kernel.h>
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#include <machine/bus.h>
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#include <dev/acpi/acpica.h>
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#include <dev/acpi/acpivar.h>
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#include <dev/acpi/acpi_ecreg.h>
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#define _COMPONENT ACPI_EC
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MODULE_NAME("EC")
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struct acpi_ec_softc {
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struct device sc_dev; /* base device glue */
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struct acpi_devnode *sc_node; /* our ACPI devnode */
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struct acpi_resources sc_res; /* our bus resources */
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UINT32 sc_gpebit; /* our GPE interrupt bit */
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bus_space_tag_t sc_data_st; /* space tag for data register */
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bus_space_handle_t sc_data_sh; /* space handle for data register */
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bus_space_tag_t sc_csr_st; /* space tag for control register */
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bus_space_handle_t sc_csr_sh; /* space handle for control register */
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int sc_flags; /* see below */
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uint32_t sc_csrvalue; /* saved control register */
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};
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#define EC_F_LOCKED 0x01 /* EC is locked */
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#define EC_F_PENDQUERY 0x02 /* query is pending */
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#define EC_LOCK_TIMEOUT 1000 /* 1ms */
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#define EC_DATA_READ(sc) \
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bus_space_read_1((sc)->sc_data_st, (sc)->sc_data_sh, 0)
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#define EC_DATA_WRITE(sc, v) \
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bus_space_write_1((sc)->sc_data_st, (sc)->sc_data_sh, 0, (v))
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#define EC_CSR_READ(sc) \
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bus_space_read_1((sc)->sc_csr_st, (sc)->sc_csr_sh, 0)
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#define EC_CSR_WRITE(sc, v) \
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bus_space_write_1((sc)->sc_csr_st, (sc)->sc_csr_sh, 0, (v))
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static __inline ACPI_STATUS
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EcLock(struct acpi_ec_softc *sc)
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{
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ACPI_STATUS status;
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status = AcpiAcquireGlobalLock();
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if (status == AE_OK)
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(sc)->sc_flags |= EC_F_LOCKED;
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return (status);
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}
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static __inline void
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EcUnlock(struct acpi_ec_softc *sc)
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{
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(sc)->sc_flags &= ~EC_F_LOCKED;
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AcpiReleaseGlobalLock();
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}
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static __inline int
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EcIsLocked(struct acpi_ec_softc *sc)
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{
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return (((sc)->sc_flags & EC_F_LOCKED) != 0);
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}
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typedef struct {
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EC_COMMAND Command;
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UINT8 Address;
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UINT8 Data;
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} EC_REQUEST;
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static void EcGpeHandler(void *Context);
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static ACPI_STATUS EcSpaceSetup(ACPI_HANDLE Region, UINT32 Function,
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void *Context, void **return_Context);
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static ACPI_STATUS EcSpaceHandler(UINT32 Function,
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ACPI_PHYSICAL_ADDRESS Address, UINT32 width,
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UINT32 *Value, void *Context, void *RegionContext);
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static ACPI_STATUS EcWaitEvent(struct acpi_ec_softc *sc, EC_EVENT Event);
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static ACPI_STATUS EcQuery(struct acpi_ec_softc *sc, UINT8 *Data);
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static ACPI_STATUS EcTransaction(struct acpi_ec_softc *sc,
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EC_REQUEST *EcRequest);
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static ACPI_STATUS EcRead(struct acpi_ec_softc *sc, UINT8 Address,
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UINT8 *Data);
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static ACPI_STATUS EcWrite(struct acpi_ec_softc *sc, UINT8 Address,
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UINT8 *Data);
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int acpiec_match(struct device *, struct cfdata *, void *);
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void acpiec_attach(struct device *, struct device *, void *);
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struct cfattach acpiec_ca = {
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sizeof(struct acpi_ec_softc), acpiec_match, acpiec_attach,
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};
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/*
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* acpiec_match:
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*
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* Autoconfiguration `match' routine.
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*/
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int
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acpiec_match(struct device *parent, struct cfdata *match, void *aux)
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{
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struct acpi_attach_args *aa = aux;
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if (aa->aa_node->ad_type != ACPI_TYPE_DEVICE)
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return (0);
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if (strcmp(aa->aa_node->ad_devinfo.HardwareId, "PNP0C09") == 0)
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return (1);
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return (0);
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}
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/*
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* acpiec_attach:
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*
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* Autoconfiguration `attach' routine.
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*/
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void
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acpiec_attach(struct device *parent, struct device *self, void *aux)
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{
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struct acpi_ec_softc *sc = (void *) self;
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struct acpi_attach_args *aa = aux;
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struct acpi_io *io0, *io1;
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ACPI_STATUS rv;
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FUNCTION_TRACE(__FUNCTION__);
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printf(": ACPI Embedded Controller\n");
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sc->sc_node = aa->aa_node;
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/* Parse our resources. */
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ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES, "parsing EC resources\n"));
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rv = acpi_resource_parse(&sc->sc_dev, sc->sc_node, &sc->sc_res,
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&acpi_resource_parse_ops_default);
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if (rv != AE_OK) {
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printf("%s: unable to parse resources: %d\n",
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sc->sc_dev.dv_xname, rv);
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return;
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}
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sc->sc_data_st = aa->aa_iot;
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io0 = acpi_res_io(&sc->sc_res, 0);
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if (io0 == NULL) {
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printf("%s: unable to find data register resource\n",
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sc->sc_dev.dv_xname);
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return;
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}
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if (bus_space_map(sc->sc_data_st, io0->ar_base, io0->ar_length,
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0, &sc->sc_data_sh) != 0) {
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printf("%s: unable to map data register\n",
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sc->sc_dev.dv_xname);
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return;
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}
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sc->sc_csr_st = aa->aa_iot;
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io1 = acpi_res_io(&sc->sc_res, 1);
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if (io1 == NULL) {
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printf("%s: unable to find csr register resource\n",
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sc->sc_dev.dv_xname);
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return;
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}
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if (bus_space_map(sc->sc_csr_st, io1->ar_base, io1->ar_length,
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0, &sc->sc_csr_sh) != 0) {
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printf("%s: unable to map csr register\n",
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sc->sc_dev.dv_xname);
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return;
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}
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/*
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* Install GPE handler.
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*
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* We evaluate the _GPE method to find the GPE bit used by the
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* Embedded Controller to signal status (SCI).
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*/
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if ((rv = acpi_eval_integer(sc->sc_node->ad_handle, "_GPE",
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&sc->sc_gpebit)) != AE_OK) {
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printf("%s: unable to evaluate _GPE: %d\n",
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sc->sc_dev.dv_xname, rv);
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return;
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}
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/*
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* Install a handler for this EC's GPE bit. Note that EC SCIs are
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* treated as both edge- and level-triggered interrupts; in other words
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* we clear the status bit immediately after getting an EC-SCI, then
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* again after we're done processing the event. This guarantees that
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* events we cause while performing a transaction (e.g. IBE/OBF) get
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* cleared before re-enabling the GPE.
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*/
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if ((rv = AcpiInstallGpeHandler(sc->sc_gpebit,
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ACPI_EVENT_LEVEL_TRIGGERED | ACPI_EVENT_EDGE_TRIGGERED,
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EcGpeHandler, sc)) != AE_OK) {
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printf("%s: unable to install GPE handler: %d\n",
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sc->sc_dev.dv_xname, rv);
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return;
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}
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/* Install address space handler. */
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if ((rv = AcpiInstallAddressSpaceHandler(sc->sc_node->ad_handle,
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ACPI_ADR_SPACE_EC, EcSpaceHandler, EcSpaceSetup, sc)) != AE_OK) {
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printf("%s: unable to install address space handler: %d\n",
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sc->sc_dev.dv_xname, rv);
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return;
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}
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return_VOID;
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}
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static void
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EcGpeQueryHandler(void *Context)
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{
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struct acpi_ec_softc *sc = Context;
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UINT8 Data;
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ACPI_STATUS Status;
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char qxx[5];
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FUNCTION_TRACE(__FUNCTION__);
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for (;;) {
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/*
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* Check EC_SCI.
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*
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* Bail out if the EC_SCI bit of the status register is not
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* set. Note that this function should only be called when
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* this bit is set (polling is used to detect IBE/OBF events).
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*
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* It is safe to do this without locking the controller, as
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* it's OK to call EcQuery when there's no data ready; in the
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* worst case we should just find nothing waiting for us and
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* bail.
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*/
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if ((EC_CSR_READ(sc) & EC_EVENT_SCI) == 0)
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break;
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/*
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* Find out why the EC is signalling us
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*/
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Status = EcQuery(sc, &Data);
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/*
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* If we failed to get anything from the EC, give up.
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*/
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if (Status != AE_OK) {
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printf("%s: GPE query failed: %d\n",
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sc->sc_dev.dv_xname, Status);
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break;
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}
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/*
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* Evaluate _Qxx to respond to the controller.
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*/
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sprintf(qxx, "_Q%02x", Data);
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strupr(qxx);
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Status = AcpiEvaluateObject(sc->sc_node->ad_handle, qxx,
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NULL, NULL);
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/*
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* Ignore spurious query requests.
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*/
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if (Status != AE_OK &&
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(Data != 0 || Status != AE_NOT_FOUND)) {
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printf("%s: evaluation of GPE query method %s "
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"failed: %d\n", sc->sc_dev.dv_xname, qxx, Status);
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}
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}
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/* I know I request Level trigger cleanup */
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if (AcpiClearEvent(sc->sc_gpebit, ACPI_EVENT_GPE) != AE_OK)
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printf("%s: AcpiClearEvent failed\n", sc->sc_dev.dv_xname);
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if (AcpiEnableEvent(sc->sc_gpebit, ACPI_EVENT_GPE) != AE_OK)
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printf("%s: AcpiEnableEvent failed\n", sc->sc_dev.dv_xname);
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return_VOID;
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}
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static void
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EcGpeHandler(void *Context)
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{
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struct acpi_ec_softc *sc = Context;
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uint32_t csrvalue;
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/*
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* If EC is locked, the intr must process EcRead/Write wait only.
|
|
* Query request must be pending.
|
|
*/
|
|
if (EcIsLocked(sc)) {
|
|
csrvalue = EC_CSR_READ(sc);
|
|
if (csrvalue & EC_EVENT_SCI)
|
|
sc->sc_flags |= EC_F_PENDQUERY;
|
|
|
|
if ((csrvalue & EC_FLAG_OUTPUT_BUFFER) != 0 ||
|
|
(csrvalue & EC_FLAG_INPUT_BUFFER) == 0) {
|
|
sc->sc_csrvalue = csrvalue;
|
|
wakeup(&sc->sc_csrvalue);
|
|
}
|
|
} else {
|
|
/* Enqueue GpeQuery handler. */
|
|
if (AcpiOsQueueForExecution(OSD_PRIORITY_HIGH,
|
|
EcGpeQueryHandler, Context) != AE_OK) {
|
|
printf("%s: failed to enqueue query handler\n",
|
|
sc->sc_dev.dv_xname);
|
|
}
|
|
}
|
|
}
|
|
|
|
static ACPI_STATUS
|
|
EcSpaceSetup(ACPI_HANDLE Region, UINT32 Function, void *Context,
|
|
void **RegionContext)
|
|
{
|
|
|
|
FUNCTION_TRACE(__FUNCTION__);
|
|
|
|
/*
|
|
* Just pass the context through, there's nothing to do here.
|
|
*/
|
|
*RegionContext = Context;
|
|
|
|
return_ACPI_STATUS(AE_OK);
|
|
}
|
|
|
|
static ACPI_STATUS
|
|
EcSpaceHandler(UINT32 Function, ACPI_PHYSICAL_ADDRESS Address, UINT32 width,
|
|
UINT32 *Value, void *Context, void *RegionContext)
|
|
{
|
|
struct acpi_ec_softc *sc = Context;
|
|
ACPI_STATUS Status = AE_OK;
|
|
EC_REQUEST EcRequest;
|
|
int i;
|
|
|
|
FUNCTION_TRACE_U32(__FUNCTION__, (UINT32)Address);
|
|
|
|
if ((Address > 0xFF) || (width % 8 != 0) || (Value == NULL) ||
|
|
(Context == NULL))
|
|
return_ACPI_STATUS(AE_BAD_PARAMETER);
|
|
|
|
switch (Function) {
|
|
case ACPI_READ_ADR_SPACE:
|
|
EcRequest.Command = EC_COMMAND_READ;
|
|
EcRequest.Address = Address;
|
|
(*Value) = 0;
|
|
break;
|
|
|
|
case ACPI_WRITE_ADR_SPACE:
|
|
EcRequest.Command = EC_COMMAND_WRITE;
|
|
EcRequest.Address = Address;
|
|
break;
|
|
|
|
default:
|
|
printf("%s: invalid Address Space function: %d\n",
|
|
sc->sc_dev.dv_xname, Function);
|
|
return_ACPI_STATUS(AE_BAD_PARAMETER);
|
|
}
|
|
|
|
/*
|
|
* Perform the transaction.
|
|
*/
|
|
(*Value) = 0;
|
|
for (i = 0; i < width; i += 8) {
|
|
if (Function == ACPI_READ_ADR_SPACE)
|
|
EcRequest.Data = 0;
|
|
else
|
|
EcRequest.Data = (UINT8)((*Value) >> i);
|
|
|
|
if ((Status = EcTransaction(sc, &EcRequest)) != AE_OK)
|
|
break;
|
|
|
|
(*Value) |= (UINT32)EcRequest.Data << i;
|
|
if (++EcRequest.Address == 0)
|
|
return_ACPI_STATUS(AE_BAD_PARAMETER);
|
|
}
|
|
|
|
return_ACPI_STATUS(Status);
|
|
}
|
|
|
|
static ACPI_STATUS
|
|
EcWaitEventIntr(struct acpi_ec_softc *sc, EC_EVENT Event)
|
|
{
|
|
EC_STATUS EcStatus;
|
|
int i;
|
|
|
|
FUNCTION_TRACE_U32(__FUNCTION__, (UINT32)Event);
|
|
|
|
/* XXX Need better test for "yes, you have interrupts". */
|
|
if (cold)
|
|
return_ACPI_STATUS(EcWaitEvent(sc, Event));
|
|
|
|
if (EcIsLocked(sc) == 0)
|
|
printf("%s: EcWaitEventIntr called without EC lock!\n",
|
|
sc->sc_dev.dv_xname);
|
|
|
|
EcStatus = EC_CSR_READ(sc);
|
|
|
|
/* Too long? */
|
|
for (i = 0; i < 10; i++) {
|
|
/* Check EC status against the desired event. */
|
|
if ((Event == EC_EVENT_OUTPUT_BUFFER_FULL) &&
|
|
(EcStatus & EC_FLAG_OUTPUT_BUFFER) != 0)
|
|
return_ACPI_STATUS(AE_OK);
|
|
|
|
if ((Event == EC_EVENT_INPUT_BUFFER_EMPTY) &&
|
|
(EcStatus & EC_FLAG_INPUT_BUFFER) == 0)
|
|
return_ACPI_STATUS(AE_OK);
|
|
|
|
sc->sc_csrvalue = 0;
|
|
/* XXXJRT Sleeping with a lock held? */
|
|
if (tsleep(&sc->sc_csrvalue, 0, "EcWait", 1) != EWOULDBLOCK)
|
|
EcStatus = sc->sc_csrvalue;
|
|
else
|
|
EcStatus = EC_CSR_READ(sc);
|
|
}
|
|
return_ACPI_STATUS(AE_ERROR);
|
|
}
|
|
|
|
static ACPI_STATUS
|
|
EcWaitEvent(struct acpi_ec_softc *sc, EC_EVENT Event)
|
|
{
|
|
EC_STATUS EcStatus;
|
|
UINT32 i = 0;
|
|
|
|
if (EcIsLocked(sc) == 0)
|
|
printf("%s: EcWaitEvent called without EC lock!\n",
|
|
sc->sc_dev.dv_xname);
|
|
|
|
/*
|
|
* Stall 1us:
|
|
* ----------
|
|
* Stall for 1 microsecond before reading the status register
|
|
* for the first time. This allows the EC to set the IBF/OBF
|
|
* bit to its proper state.
|
|
*
|
|
* XXX it is not clear why we read the CSR twice.
|
|
*/
|
|
AcpiOsStall(1);
|
|
EcStatus = EC_CSR_READ(sc);
|
|
|
|
/*
|
|
* Wait For Event:
|
|
* ---------------
|
|
* Poll the EC status register to detect completion of the last
|
|
* command. Wait up to 10ms (in 100us chunks) for this to occur.
|
|
*/
|
|
for (i = 0; i < 100; i++) {
|
|
EcStatus = EC_CSR_READ(sc);
|
|
|
|
if ((Event == EC_EVENT_OUTPUT_BUFFER_FULL) &&
|
|
(EcStatus & EC_FLAG_OUTPUT_BUFFER) != 0)
|
|
return (AE_OK);
|
|
|
|
if ((Event == EC_EVENT_INPUT_BUFFER_EMPTY) &&
|
|
(EcStatus & EC_FLAG_INPUT_BUFFER) == 0)
|
|
return (AE_OK);
|
|
|
|
AcpiOsStall(10);
|
|
}
|
|
|
|
return (AE_ERROR);
|
|
}
|
|
|
|
static ACPI_STATUS
|
|
EcQuery(struct acpi_ec_softc *sc, UINT8 *Data)
|
|
{
|
|
ACPI_STATUS Status;
|
|
|
|
if ((Status = EcLock(sc)) != AE_OK)
|
|
return (Status);
|
|
|
|
EC_CSR_WRITE(sc, EC_COMMAND_QUERY);
|
|
Status = EcWaitEvent(sc, EC_EVENT_OUTPUT_BUFFER_FULL);
|
|
if (Status == AE_OK)
|
|
*Data = EC_DATA_READ(sc);
|
|
|
|
EcUnlock(sc);
|
|
|
|
if (Status != AE_OK)
|
|
printf("%s: timed out waiting for EC to respond to "
|
|
"EC_COMMAND_QUERY\n", sc->sc_dev.dv_xname);
|
|
|
|
return (Status);
|
|
}
|
|
|
|
static ACPI_STATUS
|
|
EcTransaction(struct acpi_ec_softc *sc, EC_REQUEST *EcRequest)
|
|
{
|
|
ACPI_STATUS Status;
|
|
|
|
if ((Status = EcLock(sc)) != AE_OK)
|
|
return (Status);
|
|
|
|
/*
|
|
* Perform the transaction.
|
|
*/
|
|
switch (EcRequest->Command) {
|
|
case EC_COMMAND_READ:
|
|
Status = EcRead(sc, EcRequest->Address, &(EcRequest->Data));
|
|
break;
|
|
|
|
case EC_COMMAND_WRITE:
|
|
Status = EcWrite(sc, EcRequest->Address, &(EcRequest->Data));
|
|
break;
|
|
|
|
default:
|
|
Status = AE_SUPPORT;
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* Clear & Re-Enable the EC GPE:
|
|
* -----------------------------
|
|
* 'Consume' any EC GPE events that we generated while performing
|
|
* the transaction (e.g. IBF/OBF). Clearing the GPE here shouldn't
|
|
* have an adverse affect on outstanding EC-SCI's, as the source
|
|
* (EC-SCI) will still be high and thus should trigger the GPE
|
|
* immediately after we re-enabling it.
|
|
*/
|
|
if (sc->sc_flags & EC_F_PENDQUERY) {
|
|
if (AcpiOsQueueForExecution(OSD_PRIORITY_HIGH,
|
|
EcGpeQueryHandler, sc) != AE_OK)
|
|
printf("%s: unable to queue pending query\n",
|
|
sc->sc_dev.dv_xname);
|
|
sc->sc_flags &= ~EC_F_PENDQUERY;
|
|
}
|
|
|
|
if (AcpiClearEvent(sc->sc_gpebit, ACPI_EVENT_GPE) != AE_OK)
|
|
printf("%s: EcRequest: unable to clear EC GPE\n",
|
|
sc->sc_dev.dv_xname);
|
|
if (AcpiEnableEvent(sc->sc_gpebit, ACPI_EVENT_GPE) != AE_OK)
|
|
printf("%s: EcRequest: unable to reenable EC GPE\n",
|
|
sc->sc_dev.dv_xname);
|
|
|
|
EcUnlock(sc);
|
|
|
|
return(Status);
|
|
}
|
|
|
|
static ACPI_STATUS
|
|
EcRead(struct acpi_ec_softc *sc, UINT8 Address, UINT8 *Data)
|
|
{
|
|
ACPI_STATUS Status;
|
|
|
|
if (EcIsLocked(sc) == 0)
|
|
printf("%s: EcRead called without EC lock!\n",
|
|
sc->sc_dev.dv_xname);
|
|
|
|
/* EcBurstEnable(EmbeddedController); */
|
|
|
|
EC_CSR_WRITE(sc, EC_COMMAND_READ);
|
|
if ((Status = EcWaitEventIntr(sc, EC_EVENT_INPUT_BUFFER_EMPTY)) !=
|
|
AE_OK) {
|
|
printf("%s: EcRead: timeout waiting for EC to process "
|
|
"read command\n", sc->sc_dev.dv_xname);
|
|
return (Status);
|
|
}
|
|
|
|
EC_DATA_WRITE(sc, Address);
|
|
if ((Status = EcWaitEventIntr(sc, EC_EVENT_OUTPUT_BUFFER_FULL)) !=
|
|
AE_OK) {
|
|
printf("%s: EcRead: timeout waiting for EC to send data\n",
|
|
sc->sc_dev.dv_xname);
|
|
return (Status);
|
|
}
|
|
|
|
(*Data) = EC_DATA_READ(sc);
|
|
|
|
/* EcBurstDisable(EmbeddedController); */
|
|
|
|
return (AE_OK);
|
|
}
|
|
|
|
static ACPI_STATUS
|
|
EcWrite(struct acpi_ec_softc *sc, UINT8 Address, UINT8 *Data)
|
|
{
|
|
ACPI_STATUS Status;
|
|
|
|
if (EcIsLocked(sc) == 0)
|
|
printf("%s: EcWrite called without EC lock!\n",
|
|
sc->sc_dev.dv_xname);
|
|
|
|
/* EcBurstEnable(EmbeddedController); */
|
|
|
|
EC_CSR_WRITE(sc, EC_COMMAND_WRITE);
|
|
if ((Status = EcWaitEventIntr(sc, EC_EVENT_INPUT_BUFFER_EMPTY)) !=
|
|
AE_OK) {
|
|
printf("%s: EcWrite: timeout waiting for EC to process "
|
|
"write command\n", sc->sc_dev.dv_xname);
|
|
return (Status);
|
|
}
|
|
|
|
EC_DATA_WRITE(sc, Address);
|
|
if ((Status = EcWaitEventIntr(sc, EC_EVENT_INPUT_BUFFER_EMPTY)) !=
|
|
AE_OK) {
|
|
printf("%s: EcWrite: timeout waiting for EC to process "
|
|
"address\n", sc->sc_dev.dv_xname);
|
|
return (Status);
|
|
}
|
|
|
|
EC_DATA_WRITE(sc, *Data);
|
|
if ((Status = EcWaitEventIntr(sc, EC_EVENT_INPUT_BUFFER_EMPTY)) !=
|
|
AE_OK) {
|
|
printf("%s: EcWrite: timeout waiting for EC to process "
|
|
"data\n", sc->sc_dev.dv_xname);
|
|
return (Status);
|
|
}
|
|
|
|
/* EcBurstDisable(EmbeddedController); */
|
|
|
|
return (AE_OK);
|
|
}
|