diff options
Diffstat (limited to 'MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/SdMmcPciHci.c')
| -rw-r--r-- | MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/SdMmcPciHci.c | 107 |
1 files changed, 48 insertions, 59 deletions
diff --git a/MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/SdMmcPciHci.c b/MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/SdMmcPciHci.c index b9d04e0f17..f667264c5e 100644 --- a/MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/SdMmcPciHci.c +++ b/MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/SdMmcPciHci.c @@ -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;
}
@@ -1039,49 +1064,6 @@ SdMmcHcInitV4Enhancements ( }
/**
- 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.
Refer to SD Host Controller Simplified spec 3.0 Section 3.3 for details.
@@ -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;
}
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