e077f7a7d9
acpi_is_global_locked() functions. AcpiGlobalLock() API should be used to acquire lock between BIOS and OS. This API cannot be used to lock between threads of the OS side, because this function immediately returns if the lock is already acquired by the OS. c.f. AcpiEvAcquireGlobalLock()@evmisc.c - make sure that acpiec driver uses above functions. - use ACPI_ALLOCATE_BUFFER instead of twice calls of AcpiEvaluateObject(), in acpi_eval_string()/acpi_eval_struct(). Twice AcpiEvaluateObject() calls may cause twice side effects to ACPI machine / hardware and this may be wrong in some cases.
803 lines
25 KiB
C
803 lines
25 KiB
C
/* $NetBSD: acpi_ec.c,v 1.9 2003/02/14 11:05:39 tshiozak Exp $ */
|
|
|
|
/*
|
|
* Copyright 2001 Wasabi Systems, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* Written by Jason R. Thorpe for Wasabi Systems, Inc.
|
|
*
|
|
* 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.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed for the NetBSD Project by
|
|
* Wasabi Systems, Inc.
|
|
* 4. The name of Wasabi Systems, Inc. may not be used to endorse
|
|
* or promote products derived from this software without specific prior
|
|
* written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``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 WASABI SYSTEMS, INC
|
|
* 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.
|
|
*/
|
|
|
|
/*-
|
|
* 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.
|
|
*/
|
|
|
|
/******************************************************************************
|
|
*
|
|
* 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.
|
|
*
|
|
*****************************************************************************/
|
|
|
|
#include <sys/cdefs.h>
|
|
__KERNEL_RCSID(0, "$NetBSD: acpi_ec.c,v 1.9 2003/02/14 11:05:39 tshiozak Exp $");
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/device.h>
|
|
#include <sys/proc.h>
|
|
#include <sys/kernel.h>
|
|
|
|
#include <machine/bus.h>
|
|
|
|
#include <dev/acpi/acpica.h>
|
|
#include <dev/acpi/acpireg.h>
|
|
#include <dev/acpi/acpivar.h>
|
|
#include <dev/acpi/acpi_ecreg.h>
|
|
|
|
#define _COMPONENT ACPI_EC_COMPONENT
|
|
ACPI_MODULE_NAME("EC")
|
|
|
|
struct acpi_ec_softc {
|
|
struct device sc_dev; /* base device glue */
|
|
struct acpi_devnode *sc_node; /* our ACPI devnode */
|
|
|
|
struct acpi_resources sc_res; /* our bus resources */
|
|
|
|
UINT32 sc_gpebit; /* our GPE interrupt bit */
|
|
|
|
bus_space_tag_t sc_data_st; /* space tag for data register */
|
|
bus_space_handle_t sc_data_sh; /* space handle for data register */
|
|
|
|
bus_space_tag_t sc_csr_st; /* space tag for control register */
|
|
bus_space_handle_t sc_csr_sh; /* space handle for control register */
|
|
|
|
int sc_flags; /* see below */
|
|
|
|
uint32_t sc_csrvalue; /* saved control register */
|
|
UINT32 sc_lockhandle;
|
|
};
|
|
|
|
#define EC_F_LOCKED 0x01 /* EC is locked */
|
|
#define EC_F_PENDQUERY 0x02 /* query is pending */
|
|
|
|
#define EC_DATA_READ(sc) \
|
|
bus_space_read_1((sc)->sc_data_st, (sc)->sc_data_sh, 0)
|
|
#define EC_DATA_WRITE(sc, v) \
|
|
bus_space_write_1((sc)->sc_data_st, (sc)->sc_data_sh, 0, (v))
|
|
|
|
#define EC_CSR_READ(sc) \
|
|
bus_space_read_1((sc)->sc_csr_st, (sc)->sc_csr_sh, 0)
|
|
#define EC_CSR_WRITE(sc, v) \
|
|
bus_space_write_1((sc)->sc_csr_st, (sc)->sc_csr_sh, 0, (v))
|
|
|
|
static __inline int
|
|
EcIsLocked(struct acpi_ec_softc *sc)
|
|
{
|
|
|
|
return (acpi_is_global_locked() && (sc->sc_flags & EC_F_LOCKED));
|
|
}
|
|
|
|
static __inline ACPI_STATUS
|
|
EcLock(struct acpi_ec_softc *sc)
|
|
{
|
|
ACPI_STATUS status;
|
|
UINT32 handle;
|
|
|
|
status = acpi_acquire_global_lock(&handle);
|
|
if (ACPI_SUCCESS(status)) {
|
|
sc->sc_flags |= EC_F_LOCKED;
|
|
sc->sc_lockhandle = handle;
|
|
}
|
|
|
|
return (status);
|
|
}
|
|
|
|
static __inline void
|
|
EcUnlock(struct acpi_ec_softc *sc)
|
|
{
|
|
UINT32 handle;
|
|
|
|
if (!EcIsLocked(sc))
|
|
return;
|
|
handle = sc->sc_lockhandle;
|
|
sc->sc_flags &= EC_F_LOCKED;
|
|
acpi_release_global_lock(handle);
|
|
}
|
|
|
|
typedef struct {
|
|
EC_COMMAND Command;
|
|
UINT8 Address;
|
|
UINT8 Data;
|
|
} EC_REQUEST;
|
|
|
|
static void EcGpeHandler(void *Context);
|
|
static ACPI_STATUS EcSpaceSetup(ACPI_HANDLE Region, UINT32 Function,
|
|
void *Context, void **return_Context);
|
|
static ACPI_STATUS EcSpaceHandler(UINT32 Function,
|
|
ACPI_PHYSICAL_ADDRESS Address, UINT32 width,
|
|
ACPI_INTEGER *Value, void *Context,
|
|
void *RegionContext);
|
|
|
|
static ACPI_STATUS EcWaitEvent(struct acpi_ec_softc *sc, EC_EVENT Event);
|
|
static ACPI_STATUS EcQuery(struct acpi_ec_softc *sc, UINT8 *Data);
|
|
static ACPI_STATUS EcTransaction(struct acpi_ec_softc *sc,
|
|
EC_REQUEST *EcRequest);
|
|
static ACPI_STATUS EcRead(struct acpi_ec_softc *sc, UINT8 Address,
|
|
UINT8 *Data);
|
|
static ACPI_STATUS EcWrite(struct acpi_ec_softc *sc, UINT8 Address,
|
|
UINT8 *Data);
|
|
|
|
int acpiec_match(struct device *, struct cfdata *, void *);
|
|
void acpiec_attach(struct device *, struct device *, void *);
|
|
|
|
CFATTACH_DECL(acpiec, sizeof(struct acpi_ec_softc),
|
|
acpiec_match, acpiec_attach, NULL, NULL);
|
|
|
|
/*
|
|
* acpiec_match:
|
|
*
|
|
* Autoconfiguration `match' routine.
|
|
*/
|
|
int
|
|
acpiec_match(struct device *parent, struct cfdata *match, void *aux)
|
|
{
|
|
struct acpi_attach_args *aa = aux;
|
|
|
|
if (aa->aa_node->ad_type != ACPI_TYPE_DEVICE)
|
|
return (0);
|
|
|
|
if (strcmp(aa->aa_node->ad_devinfo.HardwareId, "PNP0C09") == 0)
|
|
return (1);
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* acpiec_attach:
|
|
*
|
|
* Autoconfiguration `attach' routine.
|
|
*/
|
|
void
|
|
acpiec_attach(struct device *parent, struct device *self, void *aux)
|
|
{
|
|
struct acpi_ec_softc *sc = (void *) self;
|
|
struct acpi_attach_args *aa = aux;
|
|
struct acpi_io *io0, *io1;
|
|
ACPI_STATUS rv;
|
|
|
|
ACPI_FUNCTION_TRACE(__FUNCTION__);
|
|
|
|
printf(": ACPI Embedded Controller\n");
|
|
|
|
sc->sc_node = aa->aa_node;
|
|
|
|
/* Parse our resources. */
|
|
ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES, "parsing EC resources\n"));
|
|
rv = acpi_resource_parse(&sc->sc_dev, sc->sc_node, &sc->sc_res,
|
|
&acpi_resource_parse_ops_default);
|
|
if (rv != AE_OK) {
|
|
printf("%s: unable to parse resources: %d\n",
|
|
sc->sc_dev.dv_xname, rv);
|
|
return;
|
|
}
|
|
|
|
sc->sc_data_st = aa->aa_iot;
|
|
io0 = acpi_res_io(&sc->sc_res, 0);
|
|
if (io0 == NULL) {
|
|
printf("%s: unable to find data register resource\n",
|
|
sc->sc_dev.dv_xname);
|
|
return;
|
|
}
|
|
if (bus_space_map(sc->sc_data_st, io0->ar_base, io0->ar_length,
|
|
0, &sc->sc_data_sh) != 0) {
|
|
printf("%s: unable to map data register\n",
|
|
sc->sc_dev.dv_xname);
|
|
return;
|
|
}
|
|
|
|
sc->sc_csr_st = aa->aa_iot;
|
|
io1 = acpi_res_io(&sc->sc_res, 1);
|
|
if (io1 == NULL) {
|
|
printf("%s: unable to find csr register resource\n",
|
|
sc->sc_dev.dv_xname);
|
|
return;
|
|
}
|
|
if (bus_space_map(sc->sc_csr_st, io1->ar_base, io1->ar_length,
|
|
0, &sc->sc_csr_sh) != 0) {
|
|
printf("%s: unable to map csr register\n",
|
|
sc->sc_dev.dv_xname);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Install GPE handler.
|
|
*
|
|
* We evaluate the _GPE method to find the GPE bit used by the
|
|
* Embedded Controller to signal status (SCI).
|
|
*/
|
|
if ((rv = acpi_eval_integer(sc->sc_node->ad_handle, "_GPE",
|
|
&sc->sc_gpebit)) != AE_OK) {
|
|
printf("%s: unable to evaluate _GPE: %d\n",
|
|
sc->sc_dev.dv_xname, rv);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Install a handler for this EC's GPE bit. Note that EC SCIs are
|
|
* treated as both edge- and level-triggered interrupts; in other words
|
|
* we clear the status bit immediately after getting an EC-SCI, then
|
|
* again after we're done processing the event. This guarantees that
|
|
* events we cause while performing a transaction (e.g. IBE/OBF) get
|
|
* cleared before re-enabling the GPE.
|
|
*/
|
|
if ((rv = AcpiInstallGpeHandler(sc->sc_gpebit,
|
|
ACPI_EVENT_LEVEL_TRIGGERED | ACPI_EVENT_EDGE_TRIGGERED,
|
|
EcGpeHandler, sc)) != AE_OK) {
|
|
printf("%s: unable to install GPE handler: %d\n",
|
|
sc->sc_dev.dv_xname, rv);
|
|
return;
|
|
}
|
|
|
|
/* Install address space handler. */
|
|
if ((rv = AcpiInstallAddressSpaceHandler(sc->sc_node->ad_handle,
|
|
ACPI_ADR_SPACE_EC, EcSpaceHandler, EcSpaceSetup, sc)) != AE_OK) {
|
|
printf("%s: unable to install address space handler: %d\n",
|
|
sc->sc_dev.dv_xname, rv);
|
|
return;
|
|
}
|
|
|
|
return_VOID;
|
|
}
|
|
|
|
static void
|
|
EcGpeQueryHandler(void *Context)
|
|
{
|
|
struct acpi_ec_softc *sc = Context;
|
|
UINT8 Data;
|
|
ACPI_STATUS Status;
|
|
char qxx[5];
|
|
|
|
ACPI_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_CSR_READ(sc) & EC_EVENT_SCI) == 0)
|
|
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) {
|
|
printf("%s: GPE query failed: %d\n",
|
|
sc->sc_dev.dv_xname, Status);
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* Evaluate _Qxx to respond to the controller.
|
|
*/
|
|
sprintf(qxx, "_Q%02x", Data);
|
|
strupr(qxx);
|
|
Status = AcpiEvaluateObject(sc->sc_node->ad_handle, qxx,
|
|
NULL, NULL);
|
|
|
|
/*
|
|
* Ignore spurious query requests.
|
|
*/
|
|
if (Status != AE_OK &&
|
|
(Data != 0 || Status != AE_NOT_FOUND)) {
|
|
printf("%s: evaluation of GPE query method %s "
|
|
"failed: %d\n", sc->sc_dev.dv_xname, qxx, Status);
|
|
}
|
|
}
|
|
|
|
/* I know I request Level trigger cleanup */
|
|
if (AcpiClearEvent(sc->sc_gpebit, ACPI_EVENT_GPE) != AE_OK)
|
|
printf("%s: AcpiClearEvent failed\n", sc->sc_dev.dv_xname);
|
|
if (AcpiEnableEvent(sc->sc_gpebit, ACPI_EVENT_GPE, 0) != AE_OK)
|
|
printf("%s: AcpiEnableEvent failed\n", sc->sc_dev.dv_xname);
|
|
|
|
return_VOID;
|
|
}
|
|
|
|
static void
|
|
EcGpeHandler(void *Context)
|
|
{
|
|
struct acpi_ec_softc *sc = Context;
|
|
uint32_t csrvalue;
|
|
|
|
/*
|
|
* 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)
|
|
{
|
|
|
|
ACPI_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,
|
|
ACPI_INTEGER *Value, void *Context, void *RegionContext)
|
|
{
|
|
struct acpi_ec_softc *sc = Context;
|
|
ACPI_STATUS Status = AE_OK;
|
|
EC_REQUEST EcRequest;
|
|
int i;
|
|
|
|
ACPI_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:
|
|
EcRequest.Command = EC_COMMAND_READ;
|
|
EcRequest.Address = Address;
|
|
(*Value) = 0;
|
|
break;
|
|
|
|
case ACPI_WRITE:
|
|
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.
|
|
*/
|
|
for (i = 0; i < width; i += 8) {
|
|
if (Function == ACPI_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;
|
|
|
|
ACPI_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, 0) != 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);
|
|
}
|