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
EcRead(struct acpi_ec_softc *sc, UINT8 Address, UINT8 *Data)
{
ACPI_STATUS status;
u_int gen_count;
int retry;
ACPI_SERIAL_ASSERT(ec);
for (retry = 0; retry < 2; retry++) {
status = EcCommand(sc, EC_COMMAND_READ);
if (ACPI_FAILURE(status))
return (status);
gen_count = sc->ec_gencount;
EC_SET_DATA(sc, Address);
status = EcWaitEvent(sc, EC_EVENT_OUTPUT_BUFFER_FULL, gen_count);
if (ACPI_FAILURE(status)) {
if (EcCheckStatus(sc, "retr_check",
EC_EVENT_INPUT_BUFFER_EMPTY) == AE_OK)
continue;
else
break;
}
*Data = EC_GET_DATA(sc);
return (AE_OK);
}
device_printf(sc->ec_dev, "EcRead: failed waiting to get data\n");
return (status);
}
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((char *)(uintptr_t)__func__);
KASSERT(Context != NULL, ("EcGpeQueryHandler called with NULL"));
/* Serialize user access with EcSpaceHandler(). */
Status = EcLock(sc);
if (ACPI_FAILURE(Status)) {
device_printf(sc->ec_dev, "GpeQuery lock error: %s\n",
AcpiFormatException(Status));
return;
}
/*
* 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. To prevent the GPE
* that may arise from running the query from causing another query
* to be queued, we clear the pending flag only after running it.
*/
Status = EcCommand(sc, EC_COMMAND_QUERY);
sc->ec_sci_pend = FALSE;
if (ACPI_FAILURE(Status)) {
EcUnlock(sc);
device_printf(sc->ec_dev, "GPE query failed: %s\n",
AcpiFormatException(Status));
return;
}
Data = EC_GET_DATA(sc);
/*
* We have to unlock before running the _Qxx method below since that
* method may attempt to read/write from EC address space, causing
* recursive acquisition of the lock.
*/
EcUnlock(sc);
/* Ignore the value for "no outstanding event". (13.3.5) */
CTR2(KTR_ACPI, "ec query ok,%s running _Q%02X", Data ? "" : " not", Data);
if (Data == 0)
return;
/* Evaluate _Qxx to respond to the controller. */
snprintf(qxx, sizeof(qxx), "_Q%02X", Data);
AcpiUtStrupr(qxx);
Status = AcpiEvaluateObject(sc->ec_handle, qxx, NULL, NULL);
if (ACPI_FAILURE(Status) && Status != AE_NOT_FOUND) {
device_printf(sc->ec_dev, "evaluation of query method %s failed: %s\n",
qxx, AcpiFormatException(Status));
}
}
static ACPI_STATUS
EcRead(struct acpi_ec_softc *sc, UINT8 Address, UINT8 *Data)
{
ACPI_STATUS status;
UINT8 data;
u_int gen_count;
ACPI_SERIAL_ASSERT(ec);
CTR1(KTR_ACPI, "ec read from %#x", Address);
/* If we can't start burst mode, continue anyway. */
status = EcCommand(sc, EC_COMMAND_BURST_ENABLE);
if (status == AE_OK) {
data = EC_GET_DATA(sc);
if (data == EC_BURST_ACK) {
CTR0(KTR_ACPI, "ec burst enabled");
sc->ec_burstactive = TRUE;
}
}
status = EcCommand(sc, EC_COMMAND_READ);
if (ACPI_FAILURE(status))
return (status);
gen_count = sc->ec_gencount;
EC_SET_DATA(sc, Address);
status = EcWaitEvent(sc, EC_EVENT_OUTPUT_BUFFER_FULL, gen_count);
if (ACPI_FAILURE(status)) {
device_printf(sc->ec_dev, "EcRead: failed waiting to get data\n");
return (status);
}
*Data = EC_GET_DATA(sc);
if (sc->ec_burstactive) {
sc->ec_burstactive = FALSE;
status = EcCommand(sc, EC_COMMAND_BURST_DISABLE);
if (ACPI_FAILURE(status))
return (status);
CTR0(KTR_ACPI, "ec disabled burst ok");
}
return (AE_OK);
}
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
EcSpaceHandler(UINT32 Function, ACPI_PHYSICAL_ADDRESS Address, UINT32 Width,
UINT64 *Value, void *Context, void *RegionContext)
{
struct acpi_ec_softc *sc = (struct acpi_ec_softc *)Context;
ACPI_PHYSICAL_ADDRESS EcAddr;
UINT8 *EcData;
ACPI_STATUS Status;
ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, (UINT32)Address);
if (Function != ACPI_READ && Function != ACPI_WRITE)
return_ACPI_STATUS (AE_BAD_PARAMETER);
if (Width % 8 != 0 || Value == NULL || Context == NULL)
return_ACPI_STATUS (AE_BAD_PARAMETER);
if (Address + Width / 8 > 256)
return_ACPI_STATUS (AE_BAD_ADDRESS);
/*
* If booting, check if we need to run the query handler. If so, we
* we call it directly here since our thread taskq is not active yet.
*/
if (cold || rebooting || sc->ec_suspending) {
if ((EC_GET_CSR(sc) & EC_EVENT_SCI)) {
EcGpeQueryHandler(sc);
}
}
/* Serialize with EcGpeQueryHandler() at transaction granularity. */
Status = EcLock(sc);
if (ACPI_FAILURE(Status))
return_ACPI_STATUS (Status);
/* If we can't start burst mode, continue anyway. */
Status = EcCommand(sc, EC_COMMAND_BURST_ENABLE);
if (ACPI_SUCCESS(Status)) {
if (EC_GET_DATA(sc) == EC_BURST_ACK) {
sc->ec_burstactive = TRUE;
}
}
/* Perform the transaction(s), based on Width. */
EcAddr = Address;
EcData = (UINT8 *)Value;
if (Function == ACPI_READ)
*Value = 0;
do {
switch (Function) {
case ACPI_READ:
Status = EcRead(sc, EcAddr, EcData);
break;
case ACPI_WRITE:
Status = EcWrite(sc, EcAddr, *EcData);
break;
}
if (ACPI_FAILURE(Status))
break;
EcAddr++;
EcData++;
} while (EcAddr < Address + Width / 8);
if (sc->ec_burstactive) {
sc->ec_burstactive = FALSE;
if (ACPI_SUCCESS(EcCommand(sc, EC_COMMAND_BURST_DISABLE))) {
}
}
EcUnlock(sc);
return_ACPI_STATUS (Status);
}
static void
EcGpeQueryHandler(void *Context)
{
struct acpi_ec_softc *sc = (struct acpi_ec_softc *)Context;
UINT8 Data;
ACPI_STATUS Status;
int retry, sci_enqueued;
char qxx[5];
ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
KASSERT(Context != NULL, ("EcGpeQueryHandler called with NULL"));
/* Serialize user access with EcSpaceHandler(). */
Status = EcLock(sc);
if (ACPI_FAILURE(Status)) {
device_printf(sc->ec_dev, "GpeQuery lock error: %s\n",
AcpiFormatException(Status));
return;
}
/*
* 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. To prevent the GPE
* that may arise from running the query from causing another query
* to be queued, we clear the pending flag only after running it.
*/
sci_enqueued = sc->ec_sci_pend;
for (retry = 0; retry < 2; retry++) {
Status = EcCommand(sc, EC_COMMAND_QUERY);
if (ACPI_SUCCESS(Status))
break;
if (EcCheckStatus(sc, "retr_check",
EC_EVENT_INPUT_BUFFER_EMPTY) == AE_OK)
continue;
else
break;
}
sc->ec_sci_pend = FALSE;
if (ACPI_FAILURE(Status)) {
EcUnlock(sc);
device_printf(sc->ec_dev, "GPE query failed: %s\n",
AcpiFormatException(Status));
return;
}
Data = EC_GET_DATA(sc);
/*
* We have to unlock before running the _Qxx method below since that
* method may attempt to read/write from EC address space, causing
* recursive acquisition of the lock.
*/
EcUnlock(sc);
/* Ignore the value for "no outstanding event". (13.3.5) */
if (Data == 0)
return;
/* Evaluate _Qxx to respond to the controller. */
ksnprintf(qxx, sizeof(qxx), "_Q%02X", Data);
AcpiUtStrupr(qxx);
Status = AcpiEvaluateObject(sc->ec_handle, qxx, NULL, NULL);
if (ACPI_FAILURE(Status) && Status != AE_NOT_FOUND) {
device_printf(sc->ec_dev, "evaluation of query method %s failed: %s\n",
qxx, AcpiFormatException(Status));
}
/* Reenable runtime GPE if its execution was deferred. */
if (sci_enqueued) {
Status = AcpiFinishGpe(sc->ec_gpehandle, sc->ec_gpebit);
if (ACPI_FAILURE(Status))
device_printf(sc->ec_dev, "reenabling runtime GPE failed: %s\n",
AcpiFormatException(Status));
}
}
