/*- * 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 #include #include #include #include #include #include "acpi.h" #include /* * Hooks for the ACPI CA debugging infrastructure */ #define _COMPONENT ACPI_EC ACPI_MODULE_NAME("EC") /* * 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? * | | | | | +----- * | | | | +------- Data Register is Command Byte? * | | | +--------- Burst Mode Enabled? * | | +----------- SCI Event? * | +------------- SMI Event? * +--------------- * */ 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_locked; int ec_lockhandle; int ec_pendquery; int ec_csrvalue; }; #define EC_LOCK_TIMEOUT 1000 /* 1ms */ static __inline ACPI_STATUS EcLock(struct acpi_ec_softc *sc) { ACPI_STATUS status; /* XXX WAIT_FOREVER is probably a bad idea, what is a better time? */ if (ACPI_SUCCESS(status = AcpiAcquireGlobalLock(WAIT_FOREVER, &sc->ec_lockhandle))) (sc)->ec_locked = 1; return(status); } static __inline void EcUnlock(struct acpi_ec_softc *sc) { (sc)->ec_locked = 0; AcpiReleaseGlobalLock(sc->ec_lockhandle); } static __inline int EcIsLocked(struct acpi_ec_softc *sc) { return((sc)->ec_locked != 0); } 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 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(__func__); /* XXX implement - need an ACPI 2.0 system to test this */ return_VOID; } /* * 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) { if ((acpi_get_type(dev) == ACPI_TYPE_DEVICE) && !acpi_disabled("ec") && acpi_MatchHid(dev, "PNP0C09")) { /* * Set device description */ device_set_desc(dev, "embedded controller"); return(0); } return(ENXIO); } static int acpi_ec_attach(device_t dev) { struct acpi_ec_softc *sc; ACPI_STATUS Status; int errval = 0; ACPI_FUNCTION_TRACE(__func__); /* * Fetch/initialise softc */ sc = device_get_softc(dev); bzero(sc, sizeof(*sc)); sc->ec_dev = dev; sc->ec_handle = acpi_get_handle(dev); /* * Attach bus resources */ sc->ec_data_rid = 0; if ((sc->ec_data_res = bus_alloc_resource(sc->ec_dev, SYS_RES_IOPORT, &sc->ec_data_rid, 0, ~0, 1, RF_ACTIVE)) == 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; if ((sc->ec_csr_res = bus_alloc_resource(sc->ec_dev, SYS_RES_IOPORT, &sc->ec_csr_rid, 0, ~0, 1, RF_ACTIVE)) == 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); /* * Install GPE handler * * Evaluate the _GPE method to find the GPE bit used by the EC to signal * status (SCI). */ ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES, "attaching GPE\n")); if (ACPI_FAILURE(Status = acpi_EvaluateInteger(sc->ec_handle, "_GPE", &sc->ec_gpebit))) { device_printf(dev, "can't evaluate _GPE - %s\n", AcpiFormatException(Status)); errval =ENXIO; goto out; } /* * 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 (ACPI_FAILURE(Status = AcpiInstallGpeHandler(sc->ec_gpebit, ACPI_EVENT_LEVEL_TRIGGERED | ACPI_EVENT_EDGE_TRIGGERED, EcGpeHandler, sc))) { 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")); if (ACPI_FAILURE(Status = AcpiInstallAddressSpaceHandler(sc->ec_handle, ACPI_ADR_SPACE_EC, EcSpaceHandler, EcSpaceSetup, sc))) { device_printf(dev, "can't install address space handler for %s - %s\n", acpi_name(sc->ec_handle), AcpiFormatException(Status)); panic("very suck"); errval = ENXIO; goto out; } ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES, "attach complete\n")); return_VALUE(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_VALUE(errval); } static void EcGpeQueryHandler(void *Context) { struct acpi_ec_softc *sc = (struct acpi_ec_softc *)Context; UINT8 Data; ACPI_STATUS Status; char qxx[5]; ACPI_FUNCTION_TRACE(__func__); for (;;) { /* * Check EC_SCI. * * Bail out if the EC_SCI bit of the status register is not set. * Note that this function should only be called when * this bit is set (polling is used to detect IBE/OBF events). * * It is safe to do this without locking the controller, as it's * OK to call EcQuery when there's no data ready; in the worst * case we should just find nothing waiting for us and bail. */ if (!(EC_GET_CSR(sc) & EC_EVENT_SCI)) break; /* * Find out why the EC is signalling us */ Status = EcQuery(sc, &Data); /* * If we failed to get anything from the EC, give up */ if (ACPI_FAILURE(Status)) { ACPI_VPRINT(sc->ec_dev, acpi_device_get_parent_softc(sc->ec_dev), "GPE query failed - %s\n", AcpiFormatException(Status)); break; } /* * Evaluate _Qxx to respond to the controller. */ sprintf(qxx, "_Q%02x", Data); strupr(qxx); Status = AcpiEvaluateObject(sc->ec_handle, qxx, NULL, NULL); /* * Ignore spurious query requests. */ if (ACPI_FAILURE(Status) && (Data != 0 || 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)); } } /* I know I request Level trigger cleanup */ if (ACPI_FAILURE(AcpiClearEvent(sc->ec_gpebit, ACPI_EVENT_GPE))) printf("EcGpeQueryHandler:ClearEvent Failed\n"); if (ACPI_FAILURE(AcpiEnableEvent(sc->ec_gpebit, ACPI_EVENT_GPE, 0))) printf("EcGpeQueryHandler:EnableEvent Failed\n"); return_VOID; } /* * Handle a GPE sent to us. */ static void EcGpeHandler(void *Context) { struct acpi_ec_softc *sc = Context; int csrvalue; /* * If EC is locked, the intr must process EcRead/Write wait only. * Query request must be pending. */ if (EcIsLocked(sc)){ csrvalue = EC_GET_CSR(sc); if (csrvalue & EC_EVENT_SCI) sc->ec_pendquery = 1; if ((csrvalue & EC_FLAG_OUTPUT_BUFFER) || !(csrvalue & EC_FLAG_INPUT_BUFFER)) { sc->ec_csrvalue = csrvalue; wakeup((void *)&sc->ec_csrvalue); } }else{ /* Queue GpeQuery Handler */ if (ACPI_FAILURE(AcpiOsQueueForExecution(OSD_PRIORITY_HIGH, EcGpeQueryHandler,Context))) { printf("QueryHandler Queuing Failed\n"); } } return; } static ACPI_STATUS EcSpaceSetup(ACPI_HANDLE Region, UINT32 Function, void *Context, void **RegionContext) { ACPI_FUNCTION_TRACE(__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; EC_REQUEST EcRequest; int i; ACPI_FUNCTION_TRACE_U32(__func__, (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: device_printf(sc->ec_dev, "invalid Address Space function %d\n", 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 (ACPI_FAILURE(Status = EcTransaction(sc, &EcRequest))) break; (*Value) |= (ACPI_INTEGER)EcRequest.Data << i; if (++EcRequest.Address == 0) return_ACPI_STATUS(AE_BAD_PARAMETER); } return_ACPI_STATUS(Status); } /* * Wait for an event interrupt for a specific condition. */ static ACPI_STATUS EcWaitEventIntr(struct acpi_ec_softc *sc, EC_EVENT Event) { EC_STATUS EcStatus; int i; ACPI_FUNCTION_TRACE_U32(__func__, (UINT32)Event); /* XXX this should test whether interrupts are available some other way */ if(cold) return_ACPI_STATUS(EcWaitEvent(sc, Event)); if (!EcIsLocked(sc)) ACPI_VPRINT(sc->ec_dev, acpi_device_get_parent_softc(sc->ec_dev), "EcWaitEventIntr called without EC lock!\n"); EcStatus = EC_GET_CSR(sc); /* XXX waiting 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)) return_ACPI_STATUS(AE_OK); if ((Event == EC_EVENT_INPUT_BUFFER_EMPTY) && !(EcStatus & EC_FLAG_INPUT_BUFFER)) return_ACPI_STATUS(AE_OK); sc->ec_csrvalue = 0; if (ACPI_MSLEEP(&sc->ec_csrvalue, &acpi_mutex, PZERO, "EcWait", 1) != EWOULDBLOCK){ EcStatus = sc->ec_csrvalue; }else{ EcStatus = EC_GET_CSR(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)) ACPI_VPRINT(sc->ec_dev, acpi_device_get_parent_softc(sc->ec_dev), "EcWaitEvent called without EC lock!\n"); /* * Stall 1us: * ---------- * Stall for 1 microsecond before reading the status register * for the first time. This allows the EC to set the IBF/OBF * bit to its proper state. * * XXX it is not clear why we read the CSR twice. */ AcpiOsStall(1); EcStatus = EC_GET_CSR(sc); /* * Wait For Event: * --------------- * Poll the EC status register to detect completion of the last * command. Wait up to 10ms (in 10us chunks) for this to occur. */ for (i = 0; i < 1000; i++) { EcStatus = EC_GET_CSR(sc); if ((Event == EC_EVENT_OUTPUT_BUFFER_FULL) && (EcStatus & EC_FLAG_OUTPUT_BUFFER)) return(AE_OK); if ((Event == EC_EVENT_INPUT_BUFFER_EMPTY) && !(EcStatus & EC_FLAG_INPUT_BUFFER)) return(AE_OK); AcpiOsStall(10); } return(AE_ERROR); } static ACPI_STATUS EcQuery(struct acpi_ec_softc *sc, UINT8 *Data) { ACPI_STATUS Status; if (ACPI_FAILURE(Status = EcLock(sc))) return(Status); EC_SET_CSR(sc, EC_COMMAND_QUERY); if (ACPI_SUCCESS(Status = EcWaitEvent(sc, EC_EVENT_OUTPUT_BUFFER_FULL))) *Data = EC_GET_DATA(sc); EcUnlock(sc); if (ACPI_FAILURE(Status)) ACPI_VPRINT(sc->ec_dev, acpi_device_get_parent_softc(sc->ec_dev), "timeout waiting for EC to respond to EC_COMMAND_QUERY\n"); return(Status); } static ACPI_STATUS EcTransaction(struct acpi_ec_softc *sc, EC_REQUEST *EcRequest) { ACPI_STATUS Status; /* * Lock the EC */ if (ACPI_FAILURE(Status = EcLock(sc))) 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; } /* * Unlock the EC */ EcUnlock(sc); /* * Clear & Re-Enable the EC GPE: * ----------------------------- * 'Consume' any EC GPE events that we generated while performing * the transaction (e.g. IBF/OBF). Clearing the GPE here shouldn't * have an adverse affect on outstanding EC-SCI's, as the source * (EC-SCI) will still be high and thus should trigger the GPE * immediately after we re-enabling it. */ if (sc->ec_pendquery){ if (ACPI_FAILURE(AcpiOsQueueForExecution(OSD_PRIORITY_HIGH, EcGpeQueryHandler, sc))) printf("Pend Query Queuing Failed\n"); sc->ec_pendquery = 0; } if (ACPI_FAILURE(AcpiClearEvent(sc->ec_gpebit, ACPI_EVENT_GPE))) ACPI_VPRINT(sc->ec_dev, acpi_device_get_parent_softc(sc->ec_dev), "EcRequest: Unable to clear the EC GPE.\n"); if (ACPI_FAILURE(AcpiEnableEvent(sc->ec_gpebit, ACPI_EVENT_GPE, 0))) ACPI_VPRINT(sc->ec_dev, acpi_device_get_parent_softc(sc->ec_dev), "EcRequest: Unable to re-enable the EC GPE.\n"); return(Status); } static ACPI_STATUS EcRead(struct acpi_ec_softc *sc, UINT8 Address, UINT8 *Data) { ACPI_STATUS Status; if (!EcIsLocked(sc)) ACPI_VPRINT(sc->ec_dev, acpi_device_get_parent_softc(sc->ec_dev), "EcRead called without EC lock!\n"); /*EcBurstEnable(EmbeddedController);*/ EC_SET_CSR(sc, EC_COMMAND_READ); if (ACPI_FAILURE(Status = EcWaitEventIntr(sc, EC_EVENT_INPUT_BUFFER_EMPTY))) { ACPI_VPRINT(sc->ec_dev, acpi_device_get_parent_softc(sc->ec_dev), "EcRead: Failed waiting for EC to process read command.\n"); return(Status); } EC_SET_DATA(sc, Address); if (ACPI_FAILURE(Status = EcWaitEventIntr(sc, EC_EVENT_OUTPUT_BUFFER_FULL))) { 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); /*EcBurstDisable(EmbeddedController);*/ return(AE_OK); } static ACPI_STATUS EcWrite(struct acpi_ec_softc *sc, UINT8 Address, UINT8 *Data) { ACPI_STATUS Status; if (!EcIsLocked(sc)) ACPI_VPRINT(sc->ec_dev, acpi_device_get_parent_softc(sc->ec_dev), "EcWrite called without EC lock!\n"); /*EcBurstEnable(EmbeddedController);*/ EC_SET_CSR(sc, EC_COMMAND_WRITE); if (ACPI_FAILURE(Status = EcWaitEventIntr(sc, EC_EVENT_INPUT_BUFFER_EMPTY))) { ACPI_VPRINT(sc->ec_dev, acpi_device_get_parent_softc(sc->ec_dev), "EcWrite: Failed waiting for EC to process write command.\n"); return(Status); } EC_SET_DATA(sc, Address); if (ACPI_FAILURE(Status = EcWaitEventIntr(sc, EC_EVENT_INPUT_BUFFER_EMPTY))) { 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); if (ACPI_FAILURE(Status = EcWaitEventIntr(sc, EC_EVENT_INPUT_BUFFER_EMPTY))) { ACPI_VPRINT(sc->ec_dev, acpi_device_get_parent_softc(sc->ec_dev), "EcWrite: Failed waiting for EC to process data.\n"); return(Status); } /*EcBurstDisable(EmbeddedController);*/ return(AE_OK); }