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MdeModulePkg/SdMmcPciHcDxe: Hook SwitchClockFreq after SD clock start 

For eMMC modules we used to notify the platform about frequency
change only after sending CMD13 which meant that platform
might not get a chance to apply required post frequency
change fixes to get the clock stable. To fix this
notification has been moved to SdMmcHcClockSupply function
just after we start the SD clock. During first time setup
the notification won't be sent to avoid changing old behavior.

Cc: Hao A Wu <hao.a.wu@intel.com>
Cc: Marcin Wojtas <mw@semihalf.com>
Cc: Zhichao Gao <zhichao.gao@intel.com>
Cc: Liming Gao <liming.gao@intel.com>

Signed-off-by: Mateusz Albecki <mateusz.albecki@intel.com>
Tested-by: Marcin Wojtas <mw@semihalf.com>
Tested-by: Hao A Wu <hao.a.wu@intel.com>
Reviewed-by: Hao A Wu <hao.a.wu@intel.com>
This commit is contained in:
Albecki, Mateusz 2019-12-21 01:13:11 +08:00 committed by mergify[bot]
parent b948a49615
commit 49accdedf9
5 changed files with 81 additions and 142 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

20
MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/EmmcDevice.c
View File

@ -727,7 +727,7 @@ EmmcSwitchBusTiming (
//
// Convert the clock freq unit from MHz to KHz.
//
Status = SdMmcHcClockSupply (PciIo, Slot, ClockFreq * 1000, Private->BaseClkFreq[Slot], Private->ControllerVersion[Slot]);
Status = SdMmcHcClockSupply (Private, Slot, BusTiming, FALSE, ClockFreq * 1000);
if (EFI_ERROR (Status)) {
return Status;
}
@ -745,24 +745,6 @@ EmmcSwitchBusTiming (
return EFI_DEVICE_ERROR;
}
if (mOverride != NULL && mOverride->NotifyPhase != NULL) {
Status = mOverride->NotifyPhase (
Private->ControllerHandle,
Slot,
EdkiiSdMmcSwitchClockFreqPost,
&BusTiming
);
if (EFI_ERROR (Status)) {
DEBUG ((
DEBUG_ERROR,
"%a: SD/MMC switch clock freq post notifier callback failed - %r\n",
__FUNCTION__,
Status
));
return Status;
}
}
return Status;
}

28
MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/SdDevice.c
View File

@ -1145,29 +1145,11 @@ SdCardSetBusMode (
return Status;
}
Status = SdMmcHcClockSupply (PciIo, Slot, BusMode.ClockFreq * 1000, Private->BaseClkFreq[Slot], Private->ControllerVersion[Slot]);
Status = SdMmcHcClockSupply (Private, Slot, BusMode.BusTiming, FALSE, BusMode.ClockFreq * 1000);
if (EFI_ERROR (Status)) {
return Status;
}
if (mOverride != NULL && mOverride->NotifyPhase != NULL) {
Status = mOverride->NotifyPhase (
Private->ControllerHandle,
Slot,
EdkiiSdMmcSwitchClockFreqPost,
&BusMode.BusTiming
);
if (EFI_ERROR (Status)) {
DEBUG ((
DEBUG_ERROR,
"%a: SD/MMC switch clock freq post notifier callback failed - %r\n",
__FUNCTION__,
Status
));
return Status;
}
}
if ((BusMode.BusTiming == SdMmcUhsSdr104) || ((BusMode.BusTiming == SdMmcUhsSdr50) && (Capability->TuningSDR50 != 0))) {
Status = SdCardTuningClock (PciIo, PassThru, Slot);
if (EFI_ERROR (Status)) {
@ -1345,7 +1327,13 @@ SdCardIdentification (
goto Error;
}
SdMmcHcInitClockFreq (PciIo, Slot, Private->BaseClkFreq[Slot], Private->ControllerVersion[Slot]);
//
// Restart the clock with first time parameters.
// NOTE: it is not required to actually restart the clock
// and go through internal clock setup again. Some time
// could be saved if we simply started the SD clock.
//
SdMmcHcClockSupply (Private, Slot, 0, TRUE, 400);
gBS->Stall (1000);

24
MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/SdMmcPciHcDxe.h
View File

@ -796,6 +796,30 @@ SdCardIdentification (
IN UINT8 Slot
);
/**
SD/MMC card clock supply.
Refer to SD Host Controller Simplified spec 3.0 Section 3.2.1 for details.
@param[in] Private A pointer to the SD_MMC_HC_PRIVATE_DATA instance.
@param[in] Slot The slot number of the SD card to send the command to.
@param[in] BusTiming BusTiming at which the frequency change is done.
@param[in] FirstTimeSetup Flag to indicate whether the clock is being setup for the first time.
@param[in] ClockFreq The max clock frequency to be set. The unit is KHz.
@retval EFI_SUCCESS The clock is supplied successfully.
@retval Others The clock isn't supplied successfully.
**/
EFI_STATUS
SdMmcHcClockSupply (
IN SD_MMC_HC_PRIVATE_DATA *Private,
IN UINT8 Slot,
IN SD_MMC_BUS_MODE BusTiming,
IN BOOLEAN FirstTimeSetup,
IN UINT64 ClockFreq
);
/**
Software reset the specified SD/MMC host controller.

107
MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/SdMmcPciHci.c
View File

@ -763,11 +763,11 @@ SdMmcHcStopClock (
Refer to SD Host Controller Simplified spec 3.0 Section 3.2.1 for details.
@param[in] PciIo The PCI IO protocol instance.
@param[in] Slot The slot number of the SD card to send the command to.
@param[in] ClockFreq The max clock frequency to be set. The unit is KHz.
@param[in] BaseClkFreq The base clock frequency of host controller in MHz.
@param[in] ControllerVer The version of host controller.
@param[in] Private A pointer to the SD_MMC_HC_PRIVATE_DATA instance.
@param[in] Slot The slot number of the SD card to send the command to.
@param[in] BusTiming BusTiming at which the frequency change is done.
@param[in] FirstTimeSetup Flag to indicate whether the clock is being setup for the first time.
@param[in] ClockFreq The max clock frequency to be set. The unit is KHz.
@retval EFI_SUCCESS The clock is supplied successfully.
@retval Others The clock isn't supplied successfully.
@ -775,11 +775,11 @@ SdMmcHcStopClock (
**/
EFI_STATUS
SdMmcHcClockSupply (
IN EFI_PCI_IO_PROTOCOL *PciIo,
IN UINT8 Slot,
IN UINT64 ClockFreq,
IN UINT32 BaseClkFreq,
IN UINT16 ControllerVer
IN SD_MMC_HC_PRIVATE_DATA *Private,
IN UINT8 Slot,
IN SD_MMC_BUS_MODE BusTiming,
IN BOOLEAN FirstTimeSetup,
IN UINT64 ClockFreq
)
{
EFI_STATUS Status;
@ -787,13 +787,15 @@ SdMmcHcClockSupply (
UINT32 Divisor;
UINT32 Remainder;
UINT16 ClockCtrl;
UINT32 BaseClkFreq;
UINT16 ControllerVer;
EFI_PCI_IO_PROTOCOL *PciIo;
//
// Calculate a divisor for SD clock frequency
//
ASSERT (BaseClkFreq != 0);
PciIo = Private->PciIo;
BaseClkFreq = Private->BaseClkFreq[Slot];
ControllerVer = Private->ControllerVersion[Slot];
if (ClockFreq == 0) {
if (BaseClkFreq == 0 || ClockFreq == 0) {
return EFI_INVALID_PARAMETER;
}
@ -883,6 +885,29 @@ SdMmcHcClockSupply (
ClockCtrl = BIT2;
Status = SdMmcHcOrMmio (PciIo, Slot, SD_MMC_HC_CLOCK_CTRL, sizeof (ClockCtrl), &ClockCtrl);
//
// We don't notify the platform on first time setup to avoid changing
// legacy behavior. During first time setup we also don't know what type
// of the card slot it is and which enum value of BusTiming applies.
//
if (!FirstTimeSetup && mOverride != NULL && mOverride->NotifyPhase != NULL) {
Status = mOverride->NotifyPhase (
Private->ControllerHandle,
Slot,
EdkiiSdMmcSwitchClockFreqPost,
&BusTiming
);
if (EFI_ERROR (Status)) {
DEBUG ((
DEBUG_ERROR,
"%a: SD/MMC switch clock freq post notifier callback failed - %r\n",
__FUNCTION__,
Status
));
return Status;
}
}
return Status;
}
@ -1038,49 +1063,6 @@ SdMmcHcInitV4Enhancements (
return EFI_SUCCESS;
}
/**
Supply SD/MMC card with lowest clock frequency at initialization.
@param[in] PciIo The PCI IO protocol instance.
@param[in] Slot The slot number of the SD card to send the command to.
@param[in] BaseClkFreq The base clock frequency of host controller in MHz.
@param[in] ControllerVer The version of host controller.
@retval EFI_SUCCESS The clock is supplied successfully.
@retval Others The clock isn't supplied successfully.
**/
EFI_STATUS
SdMmcHcInitClockFreq (
IN EFI_PCI_IO_PROTOCOL *PciIo,
IN UINT8 Slot,
IN UINT32 BaseClkFreq,
IN UINT16 ControllerVer
)
{
EFI_STATUS Status;
UINT32 InitFreq;
//
// According to SDHCI specification ver. 4.2, BaseClkFreq field value of
// the Capability Register 1 can be zero, which means a need for obtaining
// the clock frequency via another method. Fail in case it is not updated
// by SW at this point.
//
if (BaseClkFreq == 0) {
//
// Don't support get Base Clock Frequency information via another method
//
return EFI_UNSUPPORTED;
}
//
// Supply 400KHz clock frequency at initialization phase.
//
InitFreq = 400;
Status = SdMmcHcClockSupply (PciIo, Slot, InitFreq, BaseClkFreq, ControllerVer);
return Status;
}
/**
Supply SD/MMC card with maximum voltage at initialization.
@ -1216,7 +1198,14 @@ SdMmcHcInitHost (
return Status;
}
Status = SdMmcHcInitClockFreq (PciIo, Slot, Private->BaseClkFreq[Slot], Private->ControllerVersion[Slot]);
//
// Perform first time clock setup with 400 KHz frequency.
// We send the 0 as the BusTiming value because at this time
// we still do not know the slot type and which enum value will apply.
// Since it is a first time setup SdMmcHcClockSupply won't notify
// the platofrm driver anyway so it doesn't matter.
//
Status = SdMmcHcClockSupply (Private, Slot, 0, TRUE, 400);
if (EFI_ERROR (Status)) {
return Status;
}

44
MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/SdMmcPciHci.h
View File

@ -478,30 +478,6 @@ SdMmcHcStopClock (
IN UINT8 Slot
);
/**
SD/MMC card clock supply.
Refer to SD Host Controller Simplified spec 3.0 Section 3.2.1 for details.
@param[in] PciIo The PCI IO protocol instance.
@param[in] Slot The slot number of the SD card to send the command to.
@param[in] ClockFreq The max clock frequency to be set. The unit is KHz.
@param[in] BaseClkFreq The base clock frequency of host controller in MHz.
@param[in] ControllerVer The version of host controller.
@retval EFI_SUCCESS The clock is supplied successfully.
@retval Others The clock isn't supplied successfully.
**/
EFI_STATUS
SdMmcHcClockSupply (
IN EFI_PCI_IO_PROTOCOL *PciIo,
IN UINT8 Slot,
IN UINT64 ClockFreq,
IN UINT32 BaseClkFreq,
IN UINT16 ControllerVer
);
/**
SD/MMC bus power control.
@ -542,26 +518,6 @@ SdMmcHcSetBusWidth (
IN UINT16 BusWidth
);
/**
Supply SD/MMC card with lowest clock frequency at initialization.
@param[in] PciIo The PCI IO protocol instance.
@param[in] Slot The slot number of the SD card to send the command to.
@param[in] BaseClkFreq The base clock frequency of host controller in MHz.
@param[in] ControllerVer The version of host controller.
@retval EFI_SUCCESS The clock is supplied successfully.
@retval Others The clock isn't supplied successfully.
**/
EFI_STATUS
SdMmcHcInitClockFreq (
IN EFI_PCI_IO_PROTOCOL *PciIo,
IN UINT8 Slot,
IN UINT32 BaseClkFreq,
IN UINT16 ControllerVer
);
/**
Supply SD/MMC card with maximum voltage at initialization.