ee785aa9e8
handle read and write requests for widths of multiple bytes. This can be used to read 16-bit battery status registers for example. - Remove some unused variables and #if 0'd debugging cruft. - Don't complain about a GPE query that fails due to AE_NOT_FOUND if the query method was _Q00.
731 lines
23 KiB
C
731 lines
23 KiB
C
/*-
|
|
* Copyright (c) 2000 Michael Smith
|
|
* Copyright (c) 2000 BSDi
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
/******************************************************************************
|
|
*
|
|
* 1. Copyright Notice
|
|
*
|
|
* Some or all of this work - Copyright (c) 1999, Intel Corp. All rights
|
|
* reserved.
|
|
*
|
|
* 2. License
|
|
*
|
|
* 2.1. This is your license from Intel Corp. under its intellectual property
|
|
* rights. You may have additional license terms from the party that provided
|
|
* you this software, covering your right to use that party's intellectual
|
|
* property rights.
|
|
*
|
|
* 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
|
|
* copy of the source code appearing in this file ("Covered Code") an
|
|
* irrevocable, perpetual, worldwide license under Intel's copyrights in the
|
|
* base code distributed originally by Intel ("Original Intel Code") to copy,
|
|
* make derivatives, distribute, use and display any portion of the Covered
|
|
* Code in any form, with the right to sublicense such rights; and
|
|
*
|
|
* 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
|
|
* license (with the right to sublicense), under only those claims of Intel
|
|
* patents that are infringed by the Original Intel Code, to make, use, sell,
|
|
* offer to sell, and import the Covered Code and derivative works thereof
|
|
* solely to the minimum extent necessary to exercise the above copyright
|
|
* license, and in no event shall the patent license extend to any additions
|
|
* to or modifications of the Original Intel Code. No other license or right
|
|
* is granted directly or by implication, estoppel or otherwise;
|
|
*
|
|
* The above copyright and patent license is granted only if the following
|
|
* conditions are met:
|
|
*
|
|
* 3. Conditions
|
|
*
|
|
* 3.1. Redistribution of Source with Rights to Further Distribute Source.
|
|
* Redistribution of source code of any substantial portion of the Covered
|
|
* Code or modification with rights to further distribute source must include
|
|
* the above Copyright Notice, the above License, this list of Conditions,
|
|
* and the following Disclaimer and Export Compliance provision. In addition,
|
|
* Licensee must cause all Covered Code to which Licensee contributes to
|
|
* contain a file documenting the changes Licensee made to create that Covered
|
|
* Code and the date of any change. Licensee must include in that file the
|
|
* documentation of any changes made by any predecessor Licensee. Licensee
|
|
* must include a prominent statement that the modification is derived,
|
|
* directly or indirectly, from Original Intel Code.
|
|
*
|
|
* 3.2. Redistribution of Source with no Rights to Further Distribute Source.
|
|
* Redistribution of source code of any substantial portion of the Covered
|
|
* Code or modification without rights to further distribute source must
|
|
* include the following Disclaimer and Export Compliance provision in the
|
|
* documentation and/or other materials provided with distribution. In
|
|
* addition, Licensee may not authorize further sublicense of source of any
|
|
* portion of the Covered Code, and must include terms to the effect that the
|
|
* license from Licensee to its licensee is limited to the intellectual
|
|
* property embodied in the software Licensee provides to its licensee, and
|
|
* not to intellectual property embodied in modifications its licensee may
|
|
* make.
|
|
*
|
|
* 3.3. Redistribution of Executable. Redistribution in executable form of any
|
|
* substantial portion of the Covered Code or modification must reproduce the
|
|
* above Copyright Notice, and the following Disclaimer and Export Compliance
|
|
* provision in the documentation and/or other materials provided with the
|
|
* distribution.
|
|
*
|
|
* 3.4. Intel retains all right, title, and interest in and to the Original
|
|
* Intel Code.
|
|
*
|
|
* 3.5. Neither the name Intel nor any other trademark owned or controlled by
|
|
* Intel shall be used in advertising or otherwise to promote the sale, use or
|
|
* other dealings in products derived from or relating to the Covered Code
|
|
* without prior written authorization from Intel.
|
|
*
|
|
* 4. Disclaimer and Export Compliance
|
|
*
|
|
* 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
|
|
* HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
|
|
* IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
|
|
* INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
|
|
* UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
|
|
* PARTICULAR PURPOSE.
|
|
*
|
|
* 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
|
|
* OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
|
|
* COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
|
|
* SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
|
|
* CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
|
|
* HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
|
|
* SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
|
|
* LIMITED REMEDY.
|
|
*
|
|
* 4.3. Licensee shall not export, either directly or indirectly, any of this
|
|
* software or system incorporating such software without first obtaining any
|
|
* required license or other approval from the U. S. Department of Commerce or
|
|
* any other agency or department of the United States Government. In the
|
|
* event Licensee exports any such software from the United States or
|
|
* re-exports any such software from a foreign destination, Licensee shall
|
|
* ensure that the distribution and export/re-export of the software is in
|
|
* compliance with all laws, regulations, orders, or other restrictions of the
|
|
* U.S. Export Administration Regulations. Licensee agrees that neither it nor
|
|
* any of its subsidiaries will export/re-export any technical data, process,
|
|
* software, or service, directly or indirectly, to any country for which the
|
|
* United States government or any agency thereof requires an export license,
|
|
* other governmental approval, or letter of assurance, without first obtaining
|
|
* such license, approval or letter.
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|
*
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|
*****************************************************************************/
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|
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#include "opt_acpi.h"
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#include <sys/param.h>
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#include <sys/kernel.h>
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#include <sys/bus.h>
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#include <machine/bus.h>
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#include <machine/resource.h>
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#include <sys/rman.h>
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#include "acpi.h"
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#include <dev/acpica/acpivar.h>
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#include <dev/acpica/acpi_ecreg.h>
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/*
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* Hooks for the ACPI CA debugging infrastructure
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*/
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#define _COMPONENT EMBEDDED_CONTROLLER
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MODULE_NAME("EC")
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struct acpi_ec_softc {
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device_t ec_dev;
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ACPI_HANDLE ec_handle;
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UINT32 ec_gpebit;
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int ec_data_rid;
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struct resource *ec_data_res;
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bus_space_tag_t ec_data_tag;
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bus_space_handle_t ec_data_handle;
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int ec_csr_rid;
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struct resource *ec_csr_res;
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bus_space_tag_t ec_csr_tag;
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bus_space_handle_t ec_csr_handle;
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|
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|
int ec_locked;
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int ec_pendquery;
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int ec_csrvalue;
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|
};
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|
|
#define EC_LOCK_TIMEOUT 1000 /* 1ms */
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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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(sc)->ec_locked = 1;
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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)->ec_locked = 0;
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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)->ec_locked != 0);
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}
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typedef struct
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|
{
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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, ACPI_PHYSICAL_ADDRESS Address, UINT32 width, UINT32 *Value,
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void *Context, void *RegionContext);
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|
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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, EC_REQUEST *EcRequest);
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static ACPI_STATUS EcRead(struct acpi_ec_softc *sc, UINT8 Address, UINT8 *Data);
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static ACPI_STATUS EcWrite(struct acpi_ec_softc *sc, UINT8 Address, UINT8 *Data);
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static void acpi_ec_identify(driver_t driver, device_t bus);
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static int acpi_ec_probe(device_t dev);
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static int acpi_ec_attach(device_t dev);
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static device_method_t acpi_ec_methods[] = {
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/* Device interface */
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DEVMETHOD(device_identify, acpi_ec_identify),
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DEVMETHOD(device_probe, acpi_ec_probe),
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DEVMETHOD(device_attach, acpi_ec_attach),
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{0, 0}
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};
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static driver_t acpi_ec_driver = {
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"acpi_ec",
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acpi_ec_methods,
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sizeof(struct acpi_ec_softc),
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};
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devclass_t acpi_ec_devclass;
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DRIVER_MODULE(acpi_ec, acpi, acpi_ec_driver, acpi_ec_devclass, 0, 0);
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|
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/*
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* Look for an ECDT table and if we find one, set up a default EC
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* space handler to catch possible attempts to access EC space before
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* we have a real driver instance in place.
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* We're not really an identify routine, but because we get called
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* before most other things, this works out OK.
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*/
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static void
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acpi_ec_identify(driver_t driver, device_t bus)
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{
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FUNCTION_TRACE(__FUNCTION__);
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|
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/* XXX implement - need an ACPI 2.0 system to test this */
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|
return_VOID;
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}
|
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|
|
/*
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* We could setup resources in the probe routine in order to have them printed
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* when the device is attached.
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*/
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static int
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acpi_ec_probe(device_t dev)
|
|
{
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|
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if ((acpi_get_type(dev) == ACPI_TYPE_DEVICE) &&
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!acpi_disabled("ec") &&
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acpi_MatchHid(dev, "PNP0C09")) {
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|
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/*
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* Set device description
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*/
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device_set_desc(dev, "embedded controller");
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return(0);
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}
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return(ENXIO);
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}
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|
|
static int
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acpi_ec_attach(device_t dev)
|
|
{
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struct acpi_ec_softc *sc;
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ACPI_STATUS Status;
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|
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FUNCTION_TRACE(__FUNCTION__);
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|
|
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/*
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* Fetch/initialise softc
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*/
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sc = device_get_softc(dev);
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bzero(sc, sizeof(*sc));
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sc->ec_dev = dev;
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sc->ec_handle = acpi_get_handle(dev);
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/*
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* Evaluate resources
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*/
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DEBUG_PRINT(TRACE_RESOURCES, ("parsing EC resources\n"));
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acpi_parse_resources(sc->ec_dev, sc->ec_handle, &acpi_res_parse_set);
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|
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/*
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* Attach bus resources
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*/
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sc->ec_data_rid = 0;
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if ((sc->ec_data_res = bus_alloc_resource(sc->ec_dev, SYS_RES_IOPORT, &sc->ec_data_rid,
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0, ~0, 1, RF_ACTIVE)) == NULL) {
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device_printf(dev, "can't allocate data port\n");
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return_VALUE(ENXIO);
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}
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sc->ec_data_tag = rman_get_bustag(sc->ec_data_res);
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sc->ec_data_handle = rman_get_bushandle(sc->ec_data_res);
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sc->ec_csr_rid = 1;
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if ((sc->ec_csr_res = bus_alloc_resource(sc->ec_dev, SYS_RES_IOPORT, &sc->ec_csr_rid,
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0, ~0, 1, RF_ACTIVE)) == NULL) {
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device_printf(dev, "can't allocate command/status port\n");
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return_VALUE(ENXIO);
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}
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sc->ec_csr_tag = rman_get_bustag(sc->ec_csr_res);
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sc->ec_csr_handle = rman_get_bushandle(sc->ec_csr_res);
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/*
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* Install GPE handler
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*
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* Evaluate the _GPE method to find the GPE bit used by the EC to signal
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* status (SCI).
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*/
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DEBUG_PRINT(TRACE_RESOURCES, ("attaching GPE\n"));
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if ((Status = acpi_EvaluateInteger(sc->ec_handle, "_GPE", &sc->ec_gpebit)) != AE_OK) {
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device_printf(dev, "can't evaluate _GPE - %s\n", acpi_strerror(Status));
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return_VALUE(ENXIO);
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}
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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 ((Status = AcpiInstallGpeHandler(sc->ec_gpebit, ACPI_EVENT_LEVEL_TRIGGERED | ACPI_EVENT_EDGE_TRIGGERED,
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EcGpeHandler, sc)) != AE_OK) {
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device_printf(dev, "can't install GPE handler - %s\n", acpi_strerror(Status));
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return_VALUE(ENXIO);
|
|
}
|
|
|
|
/*
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* Install address space handler
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*/
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DEBUG_PRINT(TRACE_RESOURCES, ("attaching address space handler\n"));
|
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if ((Status = AcpiInstallAddressSpaceHandler(sc->ec_handle, ADDRESS_SPACE_EC,
|
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EcSpaceHandler, EcSpaceSetup, sc)) != AE_OK) {
|
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device_printf(dev, "can't install address space handler - %s\n", acpi_strerror(Status));
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return_VALUE(ENXIO);
|
|
}
|
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DEBUG_PRINT(TRACE_RESOURCES, ("attach complete\n"));
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|
|
|
return_VALUE(0);
|
|
}
|
|
|
|
static void
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|
EcGpeQueryHandler(void *Context)
|
|
{
|
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struct acpi_ec_softc *sc = (struct acpi_ec_softc *)Context;
|
|
UINT8 Data;
|
|
ACPI_STATUS Status;
|
|
char qxx[5];
|
|
|
|
FUNCTION_TRACE(__FUNCTION__);
|
|
|
|
for (;;) {
|
|
|
|
/*
|
|
* Check EC_SCI.
|
|
*
|
|
* Bail out if the EC_SCI bit of the status register is not set.
|
|
* Note that this function should only be called when
|
|
* this bit is set (polling is used to detect IBE/OBF events).
|
|
*
|
|
* It is safe to do this without locking the controller, as it's
|
|
* OK to call EcQuery when there's no data ready; in the worst
|
|
* case we should just find nothing waiting for us and bail.
|
|
*/
|
|
if (!(EC_GET_CSR(sc) & EC_EVENT_SCI))
|
|
break;
|
|
|
|
/*
|
|
* Find out why the EC is signalling us
|
|
*/
|
|
Status = EcQuery(sc, &Data);
|
|
|
|
/*
|
|
* If we failed to get anything from the EC, give up
|
|
*/
|
|
if (Status != AE_OK) {
|
|
device_printf(sc->ec_dev, "GPE query failed - %s\n", acpi_strerror(Status));
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* Evaluate _Qxx to respond to the controller.
|
|
*/
|
|
sprintf(qxx, "_Q%02x", Data);
|
|
strupr(qxx);
|
|
Status = AcpiEvaluateObject(sc->ec_handle, qxx, NULL, NULL);
|
|
/*
|
|
* Ignore spurious query requests.
|
|
*/
|
|
if (Status != AE_OK && (Data != 0 || Status != AE_NOT_FOUND)) {
|
|
device_printf(sc->ec_dev, "evaluation of GPE query method %s failed - %s\n",
|
|
qxx, acpi_strerror(Status));
|
|
}
|
|
}
|
|
/* I know I request Level trigger cleanup */
|
|
if(AcpiClearEvent(sc->ec_gpebit,ACPI_EVENT_GPE) != AE_OK)
|
|
printf("EcGpeQueryHandler:ClearEvent Failed\n");
|
|
if(AcpiEnableEvent(sc->ec_gpebit,ACPI_EVENT_GPE) != AE_OK)
|
|
printf("EcGpeQueryHandler:EnableEvent Failed\n");
|
|
return_VOID;
|
|
}
|
|
|
|
static void EcGpeHandler(void *Context)
|
|
{
|
|
struct acpi_ec_softc *sc = Context;
|
|
int csrvalue;
|
|
/*
|
|
* If EC is locked, the intr must process EcRead/Write wait only.
|
|
* Query request must be pending.
|
|
*/
|
|
if(EcIsLocked(sc)){
|
|
csrvalue = EC_GET_CSR(sc);
|
|
if(csrvalue & EC_EVENT_SCI)
|
|
sc->ec_pendquery = 1;
|
|
if((csrvalue & EC_FLAG_OUTPUT_BUFFER)
|
|
|| !(csrvalue & EC_FLAG_INPUT_BUFFER)){
|
|
sc->ec_csrvalue=csrvalue;
|
|
wakeup((void *)&sc->ec_csrvalue);
|
|
}
|
|
}else{
|
|
/*Queue GpeQuery Handler*/
|
|
if(AcpiOsQueueForExecution(OSD_PRIORITY_HIGH,
|
|
EcGpeQueryHandler,Context) != AE_OK){
|
|
printf("QueryHandler Queuing Failed\n");
|
|
}
|
|
}
|
|
return;
|
|
}
|
|
|
|
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 = (struct acpi_ec_softc *)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 ADDRESS_SPACE_READ:
|
|
EcRequest.Command = EC_COMMAND_READ;
|
|
EcRequest.Address = Address;
|
|
EcRequest.Data = 0;
|
|
break;
|
|
|
|
case ADDRESS_SPACE_WRITE:
|
|
EcRequest.Command = EC_COMMAND_WRITE;
|
|
EcRequest.Address = Address;
|
|
EcRequest.Data = (UINT8)(*Value);
|
|
break;
|
|
|
|
default:
|
|
device_printf(sc->ec_dev, "invalid Address Space function %d\n", Function);
|
|
return_ACPI_STATUS(AE_BAD_PARAMETER);
|
|
}
|
|
|
|
/*
|
|
* Perform the transaction.
|
|
*/
|
|
(*Value) = 0;
|
|
for (i = 0; i < width; i += 8) {
|
|
if (Function == ADDRESS_SPACE_READ)
|
|
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;
|
|
if(cold)
|
|
return EcWaitEvent(sc, Event);
|
|
if (!EcIsLocked(sc))
|
|
device_printf(sc->ec_dev, "EcWaitEventIntr called without EC lock!\n");
|
|
EcStatus = EC_GET_CSR(sc);
|
|
/*Too long?*/
|
|
for(i=0;i<10;i++){
|
|
if ((Event == EC_EVENT_OUTPUT_BUFFER_FULL) &&
|
|
(EcStatus & EC_FLAG_OUTPUT_BUFFER))
|
|
return(AE_OK);
|
|
|
|
if ((Event == EC_EVENT_INPUT_BUFFER_EMPTY) &&
|
|
!(EcStatus & EC_FLAG_INPUT_BUFFER))
|
|
return(AE_OK);
|
|
sc->ec_csrvalue = 0;
|
|
if(tsleep(&sc->ec_csrvalue, 0,"ECTRANS",1) != EWOULDBLOCK){
|
|
EcStatus = sc->ec_csrvalue;
|
|
}else{
|
|
EcStatus=EC_GET_CSR(sc);
|
|
}
|
|
}
|
|
return AE_ERROR;
|
|
}
|
|
|
|
static ACPI_STATUS
|
|
EcWaitEvent(struct acpi_ec_softc *sc, EC_EVENT Event)
|
|
{
|
|
EC_STATUS EcStatus;
|
|
UINT32 i = 0;
|
|
|
|
if (!EcIsLocked(sc))
|
|
device_printf(sc->ec_dev, "EcWaitEvent called without EC lock!\n");
|
|
|
|
/*
|
|
* 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.
|
|
*/
|
|
AcpiOsSleepUsec(1);
|
|
EcStatus = EC_GET_CSR(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_GET_CSR(sc);
|
|
|
|
if ((Event == EC_EVENT_OUTPUT_BUFFER_FULL) &&
|
|
(EcStatus & EC_FLAG_OUTPUT_BUFFER))
|
|
return(AE_OK);
|
|
|
|
if ((Event == EC_EVENT_INPUT_BUFFER_EMPTY) &&
|
|
!(EcStatus & EC_FLAG_INPUT_BUFFER))
|
|
return(AE_OK);
|
|
|
|
AcpiOsSleepUsec(100);
|
|
}
|
|
|
|
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_SET_CSR(sc, EC_COMMAND_QUERY);
|
|
Status = EcWaitEvent(sc, EC_EVENT_OUTPUT_BUFFER_FULL);
|
|
if (Status == AE_OK)
|
|
*Data = EC_GET_DATA(sc);
|
|
|
|
EcUnlock(sc);
|
|
|
|
if (Status != AE_OK)
|
|
device_printf(sc->ec_dev, "timeout waiting for EC to respond to EC_COMMAND_QUERY\n");
|
|
return(Status);
|
|
}
|
|
|
|
|
|
static ACPI_STATUS
|
|
EcTransaction(struct acpi_ec_softc *sc, EC_REQUEST *EcRequest)
|
|
{
|
|
ACPI_STATUS Status;
|
|
|
|
/*
|
|
* Lock the EC
|
|
*/
|
|
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->ec_pendquery){
|
|
if(AcpiOsQueueForExecution(OSD_PRIORITY_HIGH,
|
|
EcGpeQueryHandler, sc) != AE_OK)
|
|
printf("Pend Query Queuing Failed\n");
|
|
sc->ec_pendquery = 0;
|
|
}
|
|
|
|
if (AcpiClearEvent(sc->ec_gpebit, ACPI_EVENT_GPE) != AE_OK)
|
|
device_printf(sc->ec_dev, "EcRequest: Unable to clear the EC GPE.\n");
|
|
if (AcpiEnableEvent(sc->ec_gpebit, ACPI_EVENT_GPE) != AE_OK)
|
|
device_printf(sc->ec_dev, "EcRequest: Unable to re-enable the EC GPE.\n");
|
|
|
|
/*
|
|
* Unlock the EC
|
|
*/
|
|
EcUnlock(sc);
|
|
|
|
return(Status);
|
|
}
|
|
|
|
|
|
static ACPI_STATUS
|
|
EcRead(struct acpi_ec_softc *sc, UINT8 Address, UINT8 *Data)
|
|
{
|
|
ACPI_STATUS Status;
|
|
|
|
if (!EcIsLocked(sc))
|
|
device_printf(sc->ec_dev, "EcRead called without EC lock!\n");
|
|
|
|
/*EcBurstEnable(EmbeddedController);*/
|
|
|
|
EC_SET_CSR(sc, EC_COMMAND_READ);
|
|
if ((Status = EcWaitEventIntr(sc, EC_EVENT_INPUT_BUFFER_EMPTY)) != AE_OK) {
|
|
device_printf(sc->ec_dev, "EcRead: Failed waiting for EC to process read command.\n");
|
|
return(Status);
|
|
}
|
|
|
|
EC_SET_DATA(sc, Address);
|
|
if ((Status = EcWaitEventIntr(sc, EC_EVENT_OUTPUT_BUFFER_FULL)) != AE_OK) {
|
|
device_printf(sc->ec_dev, "EcRead: Failed waiting for EC to send data.\n");
|
|
return(Status);
|
|
}
|
|
|
|
(*Data) = EC_GET_DATA(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))
|
|
device_printf(sc->ec_dev, "EcWrite called without EC lock!\n");
|
|
|
|
/*EcBurstEnable(EmbeddedController);*/
|
|
|
|
EC_SET_CSR(sc, EC_COMMAND_WRITE);
|
|
if ((Status = EcWaitEventIntr(sc, EC_EVENT_INPUT_BUFFER_EMPTY)) != AE_OK) {
|
|
device_printf(sc->ec_dev, "EcWrite: Failed waiting for EC to process write command.\n");
|
|
return(Status);
|
|
}
|
|
|
|
EC_SET_DATA(sc, Address);
|
|
if ((Status = EcWaitEventIntr(sc, EC_EVENT_INPUT_BUFFER_EMPTY)) != AE_OK) {
|
|
device_printf(sc->ec_dev, "EcRead: Failed waiting for EC to process address.\n");
|
|
return(Status);
|
|
}
|
|
|
|
EC_SET_DATA(sc, *Data);
|
|
if ((Status = EcWaitEventIntr(sc, EC_EVENT_INPUT_BUFFER_EMPTY)) != AE_OK) {
|
|
device_printf(sc->ec_dev, "EcWrite: Failed waiting for EC to process data.\n");
|
|
return(Status);
|
|
}
|
|
|
|
/*EcBurstDisable(EmbeddedController);*/
|
|
|
|
return(AE_OK);
|
|
}
|