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freebsd/sys/dev/acpica/acpi_ec.c

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/*-
* Copyright (c) 2003 Nate Lawson
* 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.
*
*****************************************************************************/
#include "opt_acpi.h"
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/bus.h>
#include <machine/bus.h>
#include <machine/resource.h>
#include <sys/rman.h>
#include "acpi.h"
#include <dev/acpica/acpivar.h>
- Convert a lot of homebrew debugging output to use the ACPI CA debugging infrastructure. It's not perfect, but it's a lot better than what we've been using so far. The following rules apply to this: o BSD component names should be capitalised o Layer names should be taken from the non-CA set for now. We may elect to add some new BSD-specific layers later. - Make it possible to turn off selective debugging flags or layers by listing them in debug.acpi.layer or debug.acpi.level prefixed with !. - Fully implement support for avoiding nodes in the ACPI namespace. Nodes may be listed in the debug.acpi.avoid environment variable; these nodes and all their children will be ignored (although still scanned over) by ACPI functions which scan the namespace. Multiple nodes can be specified, separated by whitespace. - Implement support for selectively disabling ACPI subsystem components via the debug.acpi.disable environment variable. The following components can be disabled: o bus creation/scanning of the ACPI 'bus' o children attachment of children to the ACPI 'bus' o button the acpi_button control-method button driver o ec the acpi_ec embedded-controller driver o isa acpi replacement of PnP BIOS for ISA device discovery o lid the control-method lid switch driver o pci pci root-bus discovery o processor CPU power/speed management o thermal system temperature detection and control o timer ACPI timecounter Multiple components may be disabled by specifying their name(s) separated by whitespace. - Add support for ioctl registration. ACPI subsystem components may register ioctl handlers with the /dev/acpi generic ioctl handler, allowing us to avoid the need for a multitude of /dev/acpi* control devices, etc.
2000-12-08 09:16:20 +00:00
/*
* Hooks for the ACPI CA debugging infrastructure
*/
#define _COMPONENT ACPI_EC
ACPI_MODULE_NAME("EC")
- Convert a lot of homebrew debugging output to use the ACPI CA debugging infrastructure. It's not perfect, but it's a lot better than what we've been using so far. The following rules apply to this: o BSD component names should be capitalised o Layer names should be taken from the non-CA set for now. We may elect to add some new BSD-specific layers later. - Make it possible to turn off selective debugging flags or layers by listing them in debug.acpi.layer or debug.acpi.level prefixed with !. - Fully implement support for avoiding nodes in the ACPI namespace. Nodes may be listed in the debug.acpi.avoid environment variable; these nodes and all their children will be ignored (although still scanned over) by ACPI functions which scan the namespace. Multiple nodes can be specified, separated by whitespace. - Implement support for selectively disabling ACPI subsystem components via the debug.acpi.disable environment variable. The following components can be disabled: o bus creation/scanning of the ACPI 'bus' o children attachment of children to the ACPI 'bus' o button the acpi_button control-method button driver o ec the acpi_ec embedded-controller driver o isa acpi replacement of PnP BIOS for ISA device discovery o lid the control-method lid switch driver o pci pci root-bus discovery o processor CPU power/speed management o thermal system temperature detection and control o timer ACPI timecounter Multiple components may be disabled by specifying their name(s) separated by whitespace. - Add support for ioctl registration. ACPI subsystem components may register ioctl handlers with the /dev/acpi generic ioctl handler, allowing us to avoid the need for a multitude of /dev/acpi* control devices, etc.
2000-12-08 09:16:20 +00:00
/*
* EC_COMMAND:
* -----------
*/
typedef UINT8 EC_COMMAND;
#define EC_COMMAND_UNKNOWN ((EC_COMMAND) 0x00)
#define EC_COMMAND_READ ((EC_COMMAND) 0x80)
#define EC_COMMAND_WRITE ((EC_COMMAND) 0x81)
#define EC_COMMAND_BURST_ENABLE ((EC_COMMAND) 0x82)
#define EC_COMMAND_BURST_DISABLE ((EC_COMMAND) 0x83)
#define EC_COMMAND_QUERY ((EC_COMMAND) 0x84)
/*
* EC_STATUS:
* ----------
* The encoding of the EC status register is illustrated below.
* Note that a set bit (1) indicates the property is TRUE
* (e.g. if bit 0 is set then the output buffer is full).
* +-+-+-+-+-+-+-+-+
* |7|6|5|4|3|2|1|0|
* +-+-+-+-+-+-+-+-+
* | | | | | | | |
* | | | | | | | +- Output Buffer Full?
* | | | | | | +--- Input Buffer Full?
* | | | | | +----- <reserved>
* | | | | +------- Data Register is Command Byte?
* | | | +--------- Burst Mode Enabled?
* | | +----------- SCI Event?
* | +------------- SMI Event?
* +--------------- <Reserved>
*
*/
typedef UINT8 EC_STATUS;
#define EC_FLAG_OUTPUT_BUFFER ((EC_STATUS) 0x01)
#define EC_FLAG_INPUT_BUFFER ((EC_STATUS) 0x02)
#define EC_FLAG_BURST_MODE ((EC_STATUS) 0x10)
#define EC_FLAG_SCI ((EC_STATUS) 0x20)
/*
* EC_EVENT:
* ---------
*/
typedef UINT8 EC_EVENT;
#define EC_EVENT_UNKNOWN ((EC_EVENT) 0x00)
#define EC_EVENT_OUTPUT_BUFFER_FULL ((EC_EVENT) 0x01)
#define EC_EVENT_INPUT_BUFFER_EMPTY ((EC_EVENT) 0x02)
#define EC_EVENT_SCI ((EC_EVENT) 0x20)
/*
* Register access primitives
*/
#define EC_GET_DATA(sc) \
bus_space_read_1((sc)->ec_data_tag, (sc)->ec_data_handle, 0)
#define EC_SET_DATA(sc, v) \
bus_space_write_1((sc)->ec_data_tag, (sc)->ec_data_handle, 0, (v))
#define EC_GET_CSR(sc) \
bus_space_read_1((sc)->ec_csr_tag, (sc)->ec_csr_handle, 0)
#define EC_SET_CSR(sc, v) \
bus_space_write_1((sc)->ec_csr_tag, (sc)->ec_csr_handle, 0, (v))
/*
* Driver softc.
*/
struct acpi_ec_softc {
device_t ec_dev;
ACPI_HANDLE ec_handle;
UINT32 ec_gpebit;
int ec_data_rid;
struct resource *ec_data_res;
bus_space_tag_t ec_data_tag;
bus_space_handle_t ec_data_handle;
int ec_csr_rid;
struct resource *ec_csr_res;
bus_space_tag_t ec_csr_tag;
bus_space_handle_t ec_csr_handle;
int ec_glk;
int ec_glkhandle;
struct mtx ec_mtx;
UINT32 ec_polldelay;
};
/*
* XXX
* I couldn't find it in the spec but other implementations also use a
* value of 1 ms for the time to acquire global lock.
*/
#define EC_LOCK_TIMEOUT 1000
/*
* Start with an interval of 1 us for status poll loop. This delay
* will be dynamically adjusted based on the actual time waited.
*/
#define EC_POLL_DELAY 1
/* Total time in ms spent in the poll loop waiting for a response. */
#define EC_POLL_TIMEOUT 50
static __inline ACPI_STATUS
EcLock(struct acpi_ec_softc *sc)
{
ACPI_STATUS status = AE_OK;
/* Always acquire this EC's mutex. */
mtx_lock(&sc->ec_mtx);
/* If _GLK is non-zero, also acquire the global lock. */
if (sc->ec_glk) {
status = AcpiAcquireGlobalLock(EC_LOCK_TIMEOUT, &sc->ec_glkhandle);
if (ACPI_FAILURE(status))
mtx_unlock(&sc->ec_mtx);
}
return (status);
}
static __inline void
EcUnlock(struct acpi_ec_softc *sc)
{
if (sc->ec_glk)
AcpiReleaseGlobalLock(sc->ec_glkhandle);
mtx_unlock(&sc->ec_mtx);
}
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 EcCommand(struct acpi_ec_softc *sc, EC_COMMAND cmd);
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 acpi_ec_identify(driver_t driver, device_t bus);
static int acpi_ec_probe(device_t dev);
static int acpi_ec_attach(device_t dev);
static device_method_t acpi_ec_methods[] = {
/* Device interface */
DEVMETHOD(device_identify, acpi_ec_identify),
DEVMETHOD(device_probe, acpi_ec_probe),
DEVMETHOD(device_attach, acpi_ec_attach),
{0, 0}
};
static driver_t acpi_ec_driver = {
"acpi_ec",
acpi_ec_methods,
sizeof(struct acpi_ec_softc),
};
static devclass_t acpi_ec_devclass;
DRIVER_MODULE(acpi_ec, acpi, acpi_ec_driver, acpi_ec_devclass, 0, 0);
/*
* Look for an ECDT table and if we find one, set up a default EC
* space handler to catch possible attempts to access EC space before
* we have a real driver instance in place.
* We're not really an identify routine, but because we get called
* before most other things, this works out OK.
*/
static void
acpi_ec_identify(driver_t driver, device_t bus)
{
ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
/* XXX implement - need an ACPI 2.0 system to test this */
}
/*
* We could setup resources in the probe routine in order to have them printed
* when the device is attached.
*/
static int
acpi_ec_probe(device_t dev)
{
int ret = ENXIO;
- Convert a lot of homebrew debugging output to use the ACPI CA debugging infrastructure. It's not perfect, but it's a lot better than what we've been using so far. The following rules apply to this: o BSD component names should be capitalised o Layer names should be taken from the non-CA set for now. We may elect to add some new BSD-specific layers later. - Make it possible to turn off selective debugging flags or layers by listing them in debug.acpi.layer or debug.acpi.level prefixed with !. - Fully implement support for avoiding nodes in the ACPI namespace. Nodes may be listed in the debug.acpi.avoid environment variable; these nodes and all their children will be ignored (although still scanned over) by ACPI functions which scan the namespace. Multiple nodes can be specified, separated by whitespace. - Implement support for selectively disabling ACPI subsystem components via the debug.acpi.disable environment variable. The following components can be disabled: o bus creation/scanning of the ACPI 'bus' o children attachment of children to the ACPI 'bus' o button the acpi_button control-method button driver o ec the acpi_ec embedded-controller driver o isa acpi replacement of PnP BIOS for ISA device discovery o lid the control-method lid switch driver o pci pci root-bus discovery o processor CPU power/speed management o thermal system temperature detection and control o timer ACPI timecounter Multiple components may be disabled by specifying their name(s) separated by whitespace. - Add support for ioctl registration. ACPI subsystem components may register ioctl handlers with the /dev/acpi generic ioctl handler, allowing us to avoid the need for a multitude of /dev/acpi* control devices, etc.
2000-12-08 09:16:20 +00:00
if (acpi_get_type(dev) == ACPI_TYPE_DEVICE && !acpi_disabled("ec") &&
acpi_MatchHid(dev, "PNP0C09")) {
/*
* Set device description
*/
device_set_desc(dev, "embedded controller");
ret = 0;
}
return (ret);
}
static int
acpi_ec_attach(device_t dev)
{
struct acpi_ec_softc *sc;
ACPI_STATUS Status;
int errval = 0;
ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
- Convert a lot of homebrew debugging output to use the ACPI CA debugging infrastructure. It's not perfect, but it's a lot better than what we've been using so far. The following rules apply to this: o BSD component names should be capitalised o Layer names should be taken from the non-CA set for now. We may elect to add some new BSD-specific layers later. - Make it possible to turn off selective debugging flags or layers by listing them in debug.acpi.layer or debug.acpi.level prefixed with !. - Fully implement support for avoiding nodes in the ACPI namespace. Nodes may be listed in the debug.acpi.avoid environment variable; these nodes and all their children will be ignored (although still scanned over) by ACPI functions which scan the namespace. Multiple nodes can be specified, separated by whitespace. - Implement support for selectively disabling ACPI subsystem components via the debug.acpi.disable environment variable. The following components can be disabled: o bus creation/scanning of the ACPI 'bus' o children attachment of children to the ACPI 'bus' o button the acpi_button control-method button driver o ec the acpi_ec embedded-controller driver o isa acpi replacement of PnP BIOS for ISA device discovery o lid the control-method lid switch driver o pci pci root-bus discovery o processor CPU power/speed management o thermal system temperature detection and control o timer ACPI timecounter Multiple components may be disabled by specifying their name(s) separated by whitespace. - Add support for ioctl registration. ACPI subsystem components may register ioctl handlers with the /dev/acpi generic ioctl handler, allowing us to avoid the need for a multitude of /dev/acpi* control devices, etc.
2000-12-08 09:16:20 +00:00
/* Fetch/initialize softc (assumes softc is pre-zeroed). */
sc = device_get_softc(dev);
sc->ec_dev = dev;
sc->ec_handle = acpi_get_handle(dev);
sc->ec_polldelay = EC_POLL_DELAY;
mtx_init(&sc->ec_mtx, "ACPI embedded controller", NULL, MTX_DEF);
/* Attach bus resources for data and command/status ports. */
sc->ec_data_rid = 0;
sc->ec_data_res = bus_alloc_resource(sc->ec_dev, SYS_RES_IOPORT,
&sc->ec_data_rid, 0, ~0, 1, RF_ACTIVE);
if (sc->ec_data_res == NULL) {
device_printf(dev, "can't allocate data port\n");
errval = ENXIO;
goto out;
}
sc->ec_data_tag = rman_get_bustag(sc->ec_data_res);
sc->ec_data_handle = rman_get_bushandle(sc->ec_data_res);
sc->ec_csr_rid = 1;
sc->ec_csr_res = bus_alloc_resource(sc->ec_dev, SYS_RES_IOPORT,
&sc->ec_csr_rid, 0, ~0, 1, RF_ACTIVE);
if (sc->ec_csr_res == NULL) {
device_printf(dev, "can't allocate command/status port\n");
errval = ENXIO;
goto out;
}
sc->ec_csr_tag = rman_get_bustag(sc->ec_csr_res);
sc->ec_csr_handle = rman_get_bushandle(sc->ec_csr_res);
/* Check if global lock should be used. If not, leave flag as 0. */
acpi_EvaluateInteger(sc->ec_handle, "_GLK", &sc->ec_glk);
/*
* Evaluate the _GPE method to find the GPE bit used by the EC to signal
* status (SCI). Note that we don't handle the case where it can
* return a package instead of an int.
*/
ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES, "querying GPE\n"));
Status = acpi_EvaluateInteger(sc->ec_handle, "_GPE", &sc->ec_gpebit);
if (ACPI_FAILURE(Status)) {
device_printf(dev, "can't evaluate _GPE - %s\n",
AcpiFormatException(Status));
errval = ENXIO;
goto out;
}
/*
* Install a handler for this EC's GPE bit. We want edge-triggered
* behavior.
*/
ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES, "attaching GPE handler\n"));
Status = AcpiInstallGpeHandler(NULL, sc->ec_gpebit,
ACPI_EVENT_EDGE_TRIGGERED, &EcGpeHandler, sc);
if (ACPI_FAILURE(Status)) {
2001-07-05 07:21:12 +00:00
device_printf(dev, "can't install GPE handler for %s - %s\n",
acpi_name(sc->ec_handle), AcpiFormatException(Status));
errval = ENXIO;
goto out;
}
/*
* Install address space handler
*/
ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES, "attaching address space handler\n"));
Status = AcpiInstallAddressSpaceHandler(sc->ec_handle, ACPI_ADR_SPACE_EC,
&EcSpaceHandler, &EcSpaceSetup, sc);
if (ACPI_FAILURE(Status)) {
2001-07-05 07:21:12 +00:00
device_printf(dev, "can't install address space handler for %s - %s\n",
acpi_name(sc->ec_handle), AcpiFormatException(Status));
Status = AcpiRemoveGpeHandler(sc->ec_handle, sc->ec_gpebit,
&EcGpeHandler);
if (ACPI_FAILURE(Status))
panic("Added GPE handler but can't remove it");
errval = ENXIO;
goto out;
}
ACPI_VPRINT(sc->ec_dev, acpi_device_get_parent_softc(sc->ec_dev),
"GPE bit is %#x, %susing global lock\n", sc->ec_gpebit,
sc->ec_glk == 0 ? "not " : "");
ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES, "acpi_ec_attach complete\n"));
return (0);
out:
if (sc->ec_csr_res)
bus_release_resource(sc->ec_dev, SYS_RES_IOPORT, sc->ec_csr_rid,
sc->ec_csr_res);
if (sc->ec_data_res)
bus_release_resource(sc->ec_dev, SYS_RES_IOPORT, sc->ec_data_rid,
sc->ec_data_res);
return (errval);
}
static ACPI_STATUS
EcQuery(struct acpi_ec_softc *sc, UINT8 *Data)
{
ACPI_STATUS Status;
Status = EcLock(sc);
if (ACPI_FAILURE(Status))
return (Status);
/*
* Send a query command to the EC to find out which _Qxx call it
* wants to make. This command clears the SCI bit and also the
* interrupt source since we are edge-triggered.
*/
Status = EcCommand(sc, EC_COMMAND_QUERY);
if (ACPI_SUCCESS(Status))
*Data = EC_GET_DATA(sc);
EcUnlock(sc);
return (Status);
}
static void
EcGpeQueryHandler(void *Context)
{
struct acpi_ec_softc *sc = (struct acpi_ec_softc *)Context;
UINT8 Data;
ACPI_STATUS Status;
EC_STATUS EcStatus;
char qxx[5];
ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
KASSERT(Context != NULL, ("EcGpeQueryHandler called with NULL"));
- Convert a lot of homebrew debugging output to use the ACPI CA debugging infrastructure. It's not perfect, but it's a lot better than what we've been using so far. The following rules apply to this: o BSD component names should be capitalised o Layer names should be taken from the non-CA set for now. We may elect to add some new BSD-specific layers later. - Make it possible to turn off selective debugging flags or layers by listing them in debug.acpi.layer or debug.acpi.level prefixed with !. - Fully implement support for avoiding nodes in the ACPI namespace. Nodes may be listed in the debug.acpi.avoid environment variable; these nodes and all their children will be ignored (although still scanned over) by ACPI functions which scan the namespace. Multiple nodes can be specified, separated by whitespace. - Implement support for selectively disabling ACPI subsystem components via the debug.acpi.disable environment variable. The following components can be disabled: o bus creation/scanning of the ACPI 'bus' o children attachment of children to the ACPI 'bus' o button the acpi_button control-method button driver o ec the acpi_ec embedded-controller driver o isa acpi replacement of PnP BIOS for ISA device discovery o lid the control-method lid switch driver o pci pci root-bus discovery o processor CPU power/speed management o thermal system temperature detection and control o timer ACPI timecounter Multiple components may be disabled by specifying their name(s) separated by whitespace. - Add support for ioctl registration. ACPI subsystem components may register ioctl handlers with the /dev/acpi generic ioctl handler, allowing us to avoid the need for a multitude of /dev/acpi* control devices, etc.
2000-12-08 09:16:20 +00:00
/*
* Check status for 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).
*
* We don't acquire the global lock here but do protect against other
* running commands (read/write/query) by grabbing ec_mtx.
*/
mtx_lock(&sc->ec_mtx);
EcStatus = EC_GET_CSR(sc);
mtx_unlock(&sc->ec_mtx);
if ((EcStatus & EC_EVENT_SCI) == 0)
goto re_enable;
/* Find out why the EC is signaling us. */
Status = EcQuery(sc, &Data);
if (ACPI_FAILURE(Status)) {
ACPI_VPRINT(sc->ec_dev, acpi_device_get_parent_softc(sc->ec_dev),
"GPE query failed - %s\n", AcpiFormatException(Status));
goto re_enable;
}
/* Ignore the value for "no outstanding event". (13.3.5) */
if (Data == 0)
goto re_enable;
/* Evaluate _Qxx to respond to the controller. */
sprintf(qxx, "_Q%02x", Data);
strupr(qxx);
Status = AcpiEvaluateObject(sc->ec_handle, qxx, NULL, NULL);
if (ACPI_FAILURE(Status) && Status != AE_NOT_FOUND) {
ACPI_VPRINT(sc->ec_dev, acpi_device_get_parent_softc(sc->ec_dev),
"evaluation of GPE query method %s failed - %s\n",
qxx, AcpiFormatException(Status));
}
re_enable:
/* Re-enable the GPE event so we'll get future requests. */
Status = AcpiEnableGpe(NULL, sc->ec_gpebit, ACPI_NOT_ISR);
if (ACPI_FAILURE(Status))
printf("EcGpeQueryHandler: AcpiEnableEvent failed\n");
}
/*
* Handle a GPE. Currently we only handle SCI events as others must
* be handled by polling in EcWaitEvent(). This is because some ECs
* treat events as level when they should be edge-triggered.
*/
static void
EcGpeHandler(void *Context)
{
struct acpi_ec_softc *sc = Context;
ACPI_STATUS Status;
KASSERT(Context != NULL, ("EcGpeHandler called with NULL"));
/* Disable further GPEs while we handle this one. */
AcpiDisableGpe(NULL, sc->ec_gpebit, ACPI_ISR);
/* Schedule the GPE query handler. */
Status = AcpiOsQueueForExecution(OSD_PRIORITY_GPE, EcGpeQueryHandler,
Context);
if (ACPI_FAILURE(Status)) {
printf("Queuing GPE query handler failed.\n");
Status = AcpiEnableGpe(NULL, sc->ec_gpebit, ACPI_ISR);
if (ACPI_FAILURE(Status))
printf("EcGpeHandler: AcpiEnableEvent failed\n");
}
}
static ACPI_STATUS
EcSpaceSetup(ACPI_HANDLE Region, UINT32 Function, void *Context,
void **RegionContext)
{
ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
/*
* 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 = (struct acpi_ec_softc *)Context;
ACPI_STATUS Status = AE_OK;
UINT8 EcAddr, EcData;
int i;
ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, (UINT32)Address);
- Convert a lot of homebrew debugging output to use the ACPI CA debugging infrastructure. It's not perfect, but it's a lot better than what we've been using so far. The following rules apply to this: o BSD component names should be capitalised o Layer names should be taken from the non-CA set for now. We may elect to add some new BSD-specific layers later. - Make it possible to turn off selective debugging flags or layers by listing them in debug.acpi.layer or debug.acpi.level prefixed with !. - Fully implement support for avoiding nodes in the ACPI namespace. Nodes may be listed in the debug.acpi.avoid environment variable; these nodes and all their children will be ignored (although still scanned over) by ACPI functions which scan the namespace. Multiple nodes can be specified, separated by whitespace. - Implement support for selectively disabling ACPI subsystem components via the debug.acpi.disable environment variable. The following components can be disabled: o bus creation/scanning of the ACPI 'bus' o children attachment of children to the ACPI 'bus' o button the acpi_button control-method button driver o ec the acpi_ec embedded-controller driver o isa acpi replacement of PnP BIOS for ISA device discovery o lid the control-method lid switch driver o pci pci root-bus discovery o processor CPU power/speed management o thermal system temperature detection and control o timer ACPI timecounter Multiple components may be disabled by specifying their name(s) separated by whitespace. - Add support for ioctl registration. ACPI subsystem components may register ioctl handlers with the /dev/acpi generic ioctl handler, allowing us to avoid the need for a multitude of /dev/acpi* control devices, etc.
2000-12-08 09:16:20 +00:00
if (Address > 0xFF || width % 8 != 0 || Value == NULL || Context == NULL)
return_ACPI_STATUS (AE_BAD_PARAMETER);
/*
* Perform the transaction.
*/
EcAddr = Address;
for (i = 0; i < width; i += 8) {
Status = EcLock(sc);
if (ACPI_FAILURE(Status))
return (Status);
switch (Function) {
case ACPI_READ:
EcData = 0;
Status = EcRead(sc, EcAddr, &EcData);
break;
case ACPI_WRITE:
EcData = (UINT8)((*Value) >> i);
Status = EcWrite(sc, EcAddr, &EcData);
break;
default:
device_printf(sc->ec_dev, "invalid EcSpaceHandler function %d\n",
Function);
Status = AE_BAD_PARAMETER;
break;
}
EcUnlock(sc);
if (ACPI_FAILURE(Status))
return (Status);
*Value |= (ACPI_INTEGER)EcData << i;
if (++EcAddr == 0)
return_ACPI_STATUS (AE_BAD_PARAMETER);
}
return_ACPI_STATUS (Status);
}
static ACPI_STATUS
EcWaitEvent(struct acpi_ec_softc *sc, EC_EVENT Event)
{
EC_STATUS EcStatus;
ACPI_STATUS Status;
UINT32 i, period;
mtx_assert(&sc->ec_mtx, MA_OWNED);
Status = AE_NO_HARDWARE_RESPONSE;
/*
* Wait for 1 us before checking the CSR. Testing shows about
* 50% of requests complete in 1 us and 90% of them complete
* in 5 us or less.
*/
AcpiOsStall(1);
/*
* Poll the EC status register to detect completion of the last
* command. Wait up to 50 ms (in chunks of sc->ec_polldelay
* microseconds for the first 1 ms, in 1 ms chunks for the remainder
* of the period) for this to occur.
*/
for (i = 0; i < (1000 / sc->ec_polldelay) + EC_POLL_TIMEOUT; i++) {
EcStatus = EC_GET_CSR(sc);
/* Check if the user's event occurred. */
if ((Event == EC_EVENT_OUTPUT_BUFFER_FULL &&
(EcStatus & EC_FLAG_OUTPUT_BUFFER) != 0) ||
(Event == EC_EVENT_INPUT_BUFFER_EMPTY &&
(EcStatus & EC_FLAG_INPUT_BUFFER) == 0)) {
Status = AE_OK;
break;
}
/* For the first 1 ms, DELAY, after that, msleep. */
if (i < 1000)
AcpiOsStall(sc->ec_polldelay);
else
msleep(&sc->ec_polldelay, &sc->ec_mtx, PZERO, "ecpoll", 1/*ms*/);
}
/* Scale poll delay by the amount of time actually waited. */
if (Status == AE_OK) {
period = i * sc->ec_polldelay;
if (period <= 5)
sc->ec_polldelay = 1;
else if (period <= 20)
sc->ec_polldelay = 5;
else if (period <= 100)
sc->ec_polldelay = 10;
else
sc->ec_polldelay = 100;
}
return (Status);
}
static ACPI_STATUS
EcCommand(struct acpi_ec_softc *sc, EC_COMMAND cmd)
{
ACPI_STATUS Status;
EC_EVENT Event;
mtx_assert(&sc->ec_mtx, MA_OWNED);
/* Decide what to wait for based on command type. */
switch (cmd) {
case EC_COMMAND_READ:
case EC_COMMAND_WRITE:
case EC_COMMAND_BURST_DISABLE:
Event = EC_EVENT_INPUT_BUFFER_EMPTY;
break;
case EC_COMMAND_QUERY:
case EC_COMMAND_BURST_ENABLE:
Event = EC_EVENT_OUTPUT_BUFFER_FULL;
break;
default:
ACPI_VPRINT(sc->ec_dev, acpi_device_get_parent_softc(sc->ec_dev),
"EcCommand: Invalid command %#x\n", cmd);
return (AE_BAD_PARAMETER);
}
/* Run the command and wait for the chosen event. */
EC_SET_CSR(sc, cmd);
Status = EcWaitEvent(sc, Event);
if (ACPI_FAILURE(Status)) {
ACPI_VPRINT(sc->ec_dev, acpi_device_get_parent_softc(sc->ec_dev),
"EcCommand: no response to %#x\n", cmd);
}
return (Status);
}
static ACPI_STATUS
EcRead(struct acpi_ec_softc *sc, UINT8 Address, UINT8 *Data)
{
ACPI_STATUS Status;
mtx_assert(&sc->ec_mtx, MA_OWNED);
#ifdef notyet
/* If we can't start burst mode, continue anyway. */
EcCommand(sc, EC_COMMAND_BURST_ENABLE);
#endif
Status = EcCommand(sc, EC_COMMAND_READ);
if (ACPI_FAILURE(Status))
return (Status);
EC_SET_DATA(sc, Address);
Status = EcWaitEvent(sc, EC_EVENT_OUTPUT_BUFFER_FULL);
if (ACPI_FAILURE(Status)) {
ACPI_VPRINT(sc->ec_dev, acpi_device_get_parent_softc(sc->ec_dev),
"EcRead: Failed waiting for EC to send data.\n");
return (Status);
}
*Data = EC_GET_DATA(sc);
#ifdef notyet
if (sc->ec_burstactive) {
Status = EcCommand(sc, EC_COMMAND_BURST_DISABLE);
if (ACPI_FAILURE(Status))
return (Status);
}
#endif
return (AE_OK);
}
static ACPI_STATUS
EcWrite(struct acpi_ec_softc *sc, UINT8 Address, UINT8 *Data)
{
ACPI_STATUS Status;
mtx_assert(&sc->ec_mtx, MA_OWNED);
#ifdef notyet
/* If we can't start burst mode, continue anyway. */
EcCommand(sc, EC_COMMAND_BURST_ENABLE);
#endif
Status = EcCommand(sc, EC_COMMAND_WRITE);
if (ACPI_FAILURE(Status))
return (Status);
EC_SET_DATA(sc, Address);
Status = EcWaitEvent(sc, EC_EVENT_INPUT_BUFFER_EMPTY);
if (ACPI_FAILURE(Status)) {
ACPI_VPRINT(sc->ec_dev, acpi_device_get_parent_softc(sc->ec_dev),
"EcRead: Failed waiting for EC to process address\n");
return (Status);
}
EC_SET_DATA(sc, *Data);
Status = EcWaitEvent(sc, EC_EVENT_INPUT_BUFFER_EMPTY);
if (ACPI_FAILURE(Status)) {
ACPI_VPRINT(sc->ec_dev, acpi_device_get_parent_softc(sc->ec_dev),
"EcWrite: Failed waiting for EC to process data\n");
return (Status);
}
#ifdef notyet
if (sc->ec_burstactive) {
Status = EcCommand(sc, EC_COMMAND_BURST_DISABLE);
if (ACPI_FAILURE(Status))
return (Status);
}
#endif
return (AE_OK);
}