9a34eb3d5a
- process pending queries in EcUnlock() to close a race window. now there's no need to do polling for EcQuery(). - reorder inline functions and other prototypes so that the formers can get needed prototypes. - add missing prototypes.
882 lines
27 KiB
C
882 lines
27 KiB
C
/* $NetBSD: acpi_ec.c,v 1.20 2003/11/12 13:59:23 yamt 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 1.20 2003/11/12 13:59:23 yamt 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 */
|
|
|
|
struct lock sc_lock; /* serialize operations to this EC */
|
|
struct simplelock sc_slock; /* protect against interrupts */
|
|
UINT32 sc_glkhandle; /* global lock handle */
|
|
UINT32 sc_glk; /* need global lock? */
|
|
} *acpiec_ecdt_softc;
|
|
|
|
static const char * const ec_hid[] = {
|
|
"PNP0C09",
|
|
NULL
|
|
};
|
|
|
|
#define EC_F_TRANSACTION 0x01 /* doing transaction */
|
|
#define EC_F_PENDQUERY 0x02 /* query is pending */
|
|
|
|
/*
|
|
* how long to wait to acquire global lock.
|
|
* the value is taken from FreeBSD driver.
|
|
*/
|
|
#define EC_LOCK_TIMEOUT 1000
|
|
|
|
#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))
|
|
|
|
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);
|
|
static void EcGpeQueryHandler(void *);
|
|
static __inline int EcIsLocked(struct acpi_ec_softc *);
|
|
static __inline void EcLock(struct acpi_ec_softc *);
|
|
static __inline void EcUnlock(struct acpi_ec_softc *);
|
|
|
|
|
|
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);
|
|
|
|
static __inline int
|
|
EcIsLocked(struct acpi_ec_softc *sc)
|
|
{
|
|
|
|
return (lockstatus(&sc->sc_lock) == LK_EXCLUSIVE);
|
|
}
|
|
|
|
static __inline void
|
|
EcLock(struct acpi_ec_softc *sc)
|
|
{
|
|
ACPI_STATUS status;
|
|
int s;
|
|
|
|
lockmgr(&sc->sc_lock, LK_EXCLUSIVE, NULL);
|
|
if (sc->sc_glk) {
|
|
status = AcpiAcquireGlobalLock(EC_LOCK_TIMEOUT,
|
|
&sc->sc_glkhandle);
|
|
if (ACPI_FAILURE(status)) {
|
|
printf("%s: failed to acquire global lock\n",
|
|
sc->sc_dev.dv_xname);
|
|
lockmgr(&sc->sc_lock, LK_RELEASE, NULL);
|
|
return;
|
|
}
|
|
}
|
|
|
|
s = splvm(); /* XXX */
|
|
simple_lock(&sc->sc_slock);
|
|
sc->sc_flags |= EC_F_TRANSACTION;
|
|
simple_unlock(&sc->sc_slock);
|
|
splx(s);
|
|
}
|
|
|
|
static __inline void
|
|
EcUnlock(struct acpi_ec_softc *sc)
|
|
{
|
|
ACPI_STATUS status;
|
|
int s;
|
|
|
|
/*
|
|
* 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.
|
|
*/
|
|
s = splvm(); /* XXX */
|
|
simple_lock(&sc->sc_slock);
|
|
if (sc->sc_flags & EC_F_PENDQUERY) {
|
|
ACPI_STATUS Status2;
|
|
|
|
Status2 = AcpiOsQueueForExecution(OSD_PRIORITY_HIGH,
|
|
EcGpeQueryHandler, sc);
|
|
if (ACPI_FAILURE(Status2))
|
|
printf("%s: unable to queue pending query: %s\n",
|
|
sc->sc_dev.dv_xname, AcpiFormatException(Status2));
|
|
sc->sc_flags &= ~EC_F_PENDQUERY;
|
|
}
|
|
sc->sc_flags &= ~EC_F_TRANSACTION;
|
|
simple_unlock(&sc->sc_slock);
|
|
splx(s);
|
|
|
|
if (sc->sc_glk) {
|
|
status = AcpiReleaseGlobalLock(sc->sc_glkhandle);
|
|
if (ACPI_FAILURE(status))
|
|
printf("%s: failed to release global lock\n",
|
|
sc->sc_dev.dv_xname);
|
|
}
|
|
lockmgr(&sc->sc_lock, LK_RELEASE, 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);
|
|
|
|
return (acpi_match_hid(aa->aa_node->ad_devinfo, ec_hid));
|
|
}
|
|
|
|
#if 0
|
|
void
|
|
acpiec_early_attach(struct device *parent)
|
|
{
|
|
EC_BOOT_RESOURCES *ep;
|
|
ACPI_HANDLE handle;
|
|
|
|
status = AcpiGetFirmwareTable("ECDT", 1, ACPI_LOGICAL_ADDRESSING,
|
|
(ACPI_TABLE_HEADER **)&ep;
|
|
if (ACPI_FAILURE(status))
|
|
return;
|
|
|
|
if (ep->EcControl.RegisterBitWidth != 8 ||
|
|
ep->EcData.RegisterBitWidth != 8) {
|
|
printf("%s: ECDT data is invalid, RegisterBitWidth=%d/%d\n",
|
|
ep->EcControl.RegisterBitWidth, ep->EcData.RegisterBitWidth);
|
|
return;
|
|
}
|
|
|
|
status = AcpiGetHandle(ACPI_ROOT_OBJECT, ep->EcId, &handle);
|
|
if (ACPI_FAILURE(status)) {
|
|
printf("%s: failed to look up EC object %s: %s\n", ep->EcId,
|
|
AcpiFormatExeception(status));
|
|
return (status);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* 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");
|
|
|
|
lockinit(&sc->sc_lock, PWAIT, "eclock", 0, 0);
|
|
simple_lock_init(&sc->sc_slock);
|
|
|
|
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 (ACPI_FAILURE(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).
|
|
*/
|
|
rv = acpi_eval_integer(sc->sc_node->ad_handle, "_GPE", &sc->sc_gpebit);
|
|
if (ACPI_FAILURE(rv)) {
|
|
printf("%s: unable to evaluate _GPE: %s\n",
|
|
sc->sc_dev.dv_xname, AcpiFormatException(rv));
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* evaluate _GLK to see if we should acquire global lock
|
|
* when accessing the EC.
|
|
*/
|
|
rv = acpi_eval_integer(sc->sc_node->ad_handle, "_GLK", &sc->sc_glk);
|
|
if (ACPI_FAILURE(rv)) {
|
|
if (rv != AE_NOT_FOUND)
|
|
printf("%s: unable to evaluate _GLK: %s\n",
|
|
sc->sc_dev.dv_xname, AcpiFormatException(rv));
|
|
sc->sc_glk = 0;
|
|
}
|
|
|
|
/*
|
|
* 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.
|
|
*/
|
|
rv = AcpiInstallGpeHandler(NULL, sc->sc_gpebit,
|
|
ACPI_EVENT_EDGE_TRIGGERED, EcGpeHandler, sc);
|
|
if (ACPI_FAILURE(rv)) {
|
|
printf("%s: unable to install GPE handler: %s\n",
|
|
sc->sc_dev.dv_xname, AcpiFormatException(rv));
|
|
return;
|
|
}
|
|
|
|
/* Install address space handler. */
|
|
rv = AcpiInstallAddressSpaceHandler(sc->sc_node->ad_handle,
|
|
ACPI_ADR_SPACE_EC, EcSpaceHandler, EcSpaceSetup, sc);
|
|
if (ACPI_FAILURE(rv)) {
|
|
printf("%s: unable to install address space handler: %s\n",
|
|
sc->sc_dev.dv_xname, AcpiFormatException(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;
|
|
|
|
EcLock(sc);
|
|
|
|
/*
|
|
* Find out why the EC is signalling us
|
|
*/
|
|
Status = EcQuery(sc, &Data);
|
|
|
|
EcUnlock(sc);
|
|
|
|
/*
|
|
* If we failed to get anything from the EC, give up.
|
|
*/
|
|
if (ACPI_FAILURE(Status)) {
|
|
printf("%s: GPE query failed: %s\n",
|
|
sc->sc_dev.dv_xname, AcpiFormatException(Status));
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* Evaluate _Qxx to respond to the controller.
|
|
*/
|
|
sprintf(qxx, "_Q%02X", Data);
|
|
Status = AcpiEvaluateObject(sc->sc_node->ad_handle, qxx,
|
|
NULL, NULL);
|
|
|
|
/*
|
|
* Ignore spurious query requests.
|
|
*/
|
|
if (ACPI_FAILURE(Status) &&
|
|
(Data != 0 || Status != AE_NOT_FOUND)) {
|
|
printf("%s: evaluation of GPE query method %s "
|
|
"failed: %s\n", sc->sc_dev.dv_xname, qxx,
|
|
AcpiFormatException(Status));
|
|
}
|
|
}
|
|
|
|
/* I know I request Level trigger cleanup */
|
|
Status = AcpiClearGpe(NULL, sc->sc_gpebit, ACPI_NOT_ISR);
|
|
if (ACPI_FAILURE(Status))
|
|
printf("%s: AcpiClearGpe failed: %s\n", sc->sc_dev.dv_xname,
|
|
AcpiFormatException(Status));
|
|
|
|
return_VOID;
|
|
}
|
|
|
|
static void
|
|
EcGpeHandler(void *Context)
|
|
{
|
|
struct acpi_ec_softc *sc = Context;
|
|
uint32_t csrvalue;
|
|
ACPI_STATUS Status;
|
|
|
|
/*
|
|
* If EC is locked, the intr must process EcRead/Write wait only.
|
|
* Query request must be pending.
|
|
*/
|
|
simple_lock(&sc->sc_slock);
|
|
if (sc->sc_flags & EC_F_TRANSACTION) {
|
|
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);
|
|
}
|
|
simple_unlock(&sc->sc_slock);
|
|
} else {
|
|
simple_unlock(&sc->sc_slock);
|
|
/* Enqueue GpeQuery handler. */
|
|
Status = AcpiOsQueueForExecution(OSD_PRIORITY_HIGH,
|
|
EcGpeQueryHandler, Context);
|
|
if (ACPI_FAILURE(Status))
|
|
printf("%s: failed to enqueue query handler: %s\n",
|
|
sc->sc_dev.dv_xname, AcpiFormatException(Status));
|
|
}
|
|
}
|
|
|
|
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);
|
|
|
|
Status = EcTransaction(sc, &EcRequest);
|
|
if (ACPI_FAILURE(Status))
|
|
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 (EcIsLocked(sc) == 0)
|
|
printf("%s: EcQuery called without EC lock!\n",
|
|
sc->sc_dev.dv_xname);
|
|
|
|
EC_CSR_WRITE(sc, EC_COMMAND_QUERY);
|
|
Status = EcWaitEventIntr(sc, EC_EVENT_OUTPUT_BUFFER_FULL);
|
|
if (ACPI_SUCCESS(Status))
|
|
*Data = EC_DATA_READ(sc);
|
|
|
|
if (ACPI_FAILURE(Status))
|
|
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;
|
|
|
|
EcLock(sc);
|
|
|
|
/*
|
|
* 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;
|
|
}
|
|
|
|
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);
|
|
}
|