REF: https://bugzilla.tianocore.org/show_bug.cgi?id=1140
To avoid stability issues on some designs the driver will now send SEND_STATUS at previous, lower, frequency when upgrading the bus timing. Cc: Hao A Wu <hao.a...@intel.com> Cc: Marcin Wojtas <m...@semihalf.com> Cc: Zhichao Gao <zhichao....@intel.com> Cc: Liming Gao <liming....@intel.com> Signed-off-by: Mateusz Albecki <mateusz.albe...@intel.com> --- MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/EmmcDevice.c | 88 ++++++++++++++++------ MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/SdMmcPciHcDxe.c | 2 +- MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/SdMmcPciHcDxe.h | 1 + MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/SdMmcPciHci.c | 2 + 4 files changed, 69 insertions(+), 24 deletions(-) diff --git a/MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/EmmcDevice.c b/MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/EmmcDevice.c index 776c0e796c..8b5f8e8ee7 100644 --- a/MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/EmmcDevice.c +++ b/MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/EmmcDevice.c @@ -558,6 +558,43 @@ EmmcTuningClkForHs200 ( return EFI_DEVICE_ERROR; } +/** + Check the SWITCH operation status. + + @param[in] PassThru A pointer to the EFI_SD_MMC_PASS_THRU_PROTOCOL instance. + @param[in] Slot The slot number on which command should be sent. + @param[in] Rca The relative device address. + + @retval EFI_SUCCESS The SWITCH finished siccessfully. + @retval others The SWITCH failed. +**/ +EFI_STATUS +EmmcCheckSwitchStatus ( + IN EFI_SD_MMC_PASS_THRU_PROTOCOL *PassThru, + IN UINT8 Slot, + IN UINT16 Rca + ) +{ + EFI_STATUS Status; + UINT32 DevStatus; + + Status = EmmcSendStatus (PassThru, Slot, Rca, &DevStatus); + if (EFI_ERROR (Status)) { + DEBUG ((DEBUG_ERROR, "EmmcCheckSwitchStatus: Send status fails with %r\n", Status)); + return Status; + } + + // + // Check the switch operation is really successful or not. + // + if ((DevStatus & BIT7) != 0) { + DEBUG ((DEBUG_ERROR, "EmmcCheckSwitchStatus: The switch operation fails as DevStatus is 0x%08x\n", DevStatus)); + return EFI_DEVICE_ERROR; + } + + return EFI_SUCCESS; +} + /** Switch the bus width to specified width. @@ -591,7 +628,6 @@ EmmcSwitchBusWidth ( UINT8 Index; UINT8 Value; UINT8 CmdSet; - UINT32 DevStatus; // // Write Byte, the Value field is written into the byte pointed by Index. @@ -617,18 +653,10 @@ EmmcSwitchBusWidth ( return Status; } - Status = EmmcSendStatus (PassThru, Slot, Rca, &DevStatus); + Status = EmmcCheckSwitchStatus (PassThru, Slot, Rca); if (EFI_ERROR (Status)) { - DEBUG ((DEBUG_ERROR, "EmmcSwitchBusWidth: Send status fails with %r\n", Status)); return Status; } - // - // Check the switch operation is really successful or not. - // - if ((DevStatus & BIT7) != 0) { - DEBUG ((DEBUG_ERROR, "EmmcSwitchBusWidth: The switch operation fails as DevStatus is 0x%08x\n", DevStatus)); - return EFI_DEVICE_ERROR; - } Status = SdMmcHcSetBusWidth (PciIo, Slot, BusWidth); @@ -669,9 +697,9 @@ EmmcSwitchBusTiming ( UINT8 Index; UINT8 Value; UINT8 CmdSet; - UINT32 DevStatus; SD_MMC_HC_PRIVATE_DATA *Private; UINT8 HostCtrl1; + BOOLEAN DelaySendStatus; Private = SD_MMC_HC_PRIVATE_FROM_THIS (PassThru); // @@ -695,7 +723,7 @@ EmmcSwitchBusTiming ( Value = 0; break; default: - DEBUG ((DEBUG_ERROR, "EmmcSwitchBusTiming: Unsupported BusTiming(%d\n)", BusTiming)); + DEBUG ((DEBUG_ERROR, "EmmcSwitchBusTiming: Unsupported BusTiming(%d)\n", BusTiming)); return EFI_INVALID_PARAMETER; } @@ -724,6 +752,26 @@ EmmcSwitchBusTiming ( return Status; } + // + // For cases when we switch bus timing to higher mode from current we want to + // send SEND_STATUS at current, lower, frequency then the target frequency to avoid + // stability issues. It has been observed that some designs are unable to process the + // SEND_STATUS at higher frequency during switch to HS200 @200MHz irrespective of the number of retries + // and only running the clock tuning is able to make them work at target frequency. + // + // For cases when we are downgrading the frequency and current high frequency is invalid + // we have to first change the frequency to target frequency and then send the SEND_STATUS. + // + if (Private->Slot[Slot].CurrentFreq < (ClockFreq * 1000)) { + Status = EmmcCheckSwitchStatus (PassThru, Slot, Rca); + if (EFI_ERROR (Status)) { + return Status; + } + DelaySendStatus = FALSE; + } else { + DelaySendStatus = TRUE; + } + // // Convert the clock freq unit from MHz to KHz. // @@ -732,17 +780,11 @@ EmmcSwitchBusTiming ( return Status; } - Status = EmmcSendStatus (PassThru, Slot, Rca, &DevStatus); - if (EFI_ERROR (Status)) { - DEBUG ((DEBUG_ERROR, "EmmcSwitchBusTiming: Send status fails with %r\n", Status)); - return Status; - } - // - // Check the switch operation is really successful or not. - // - if ((DevStatus & BIT7) != 0) { - DEBUG ((DEBUG_ERROR, "EmmcSwitchBusTiming: The switch operation fails as DevStatus is 0x%08x\n", DevStatus)); - return EFI_DEVICE_ERROR; + if (DelaySendStatus) { + Status = EmmcCheckSwitchStatus (PassThru, Slot, Rca); + if (EFI_ERROR (Status)) { + return Status; + } } return Status; diff --git a/MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/SdMmcPciHcDxe.c b/MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/SdMmcPciHcDxe.c index b18ff3e972..57f4cf329a 100644 --- a/MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/SdMmcPciHcDxe.c +++ b/MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/SdMmcPciHcDxe.c @@ -28,7 +28,7 @@ EFI_DRIVER_BINDING_PROTOCOL gSdMmcPciHcDriverBinding = { NULL }; -#define SLOT_INIT_TEMPLATE {0, UnknownSlot, 0, 0, 0, \ +#define SLOT_INIT_TEMPLATE {0, UnknownSlot, 0, 0, 0, 0, \ {EDKII_SD_MMC_BUS_WIDTH_IGNORE,\ EDKII_SD_MMC_CLOCK_FREQ_IGNORE,\ {EDKII_SD_MMC_DRIVER_STRENGTH_IGNORE}}} diff --git a/MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/SdMmcPciHcDxe.h b/MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/SdMmcPciHcDxe.h index 5bc3577ba2..bb3d38482f 100644 --- a/MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/SdMmcPciHcDxe.h +++ b/MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/SdMmcPciHcDxe.h @@ -83,6 +83,7 @@ typedef struct { BOOLEAN MediaPresent; BOOLEAN Initialized; SD_MMC_CARD_TYPE CardType; + UINT64 CurrentFreq; EDKII_SD_MMC_OPERATING_PARAMETERS OperatingParameters; } SD_MMC_HC_SLOT; diff --git a/MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/SdMmcPciHci.c b/MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/SdMmcPciHci.c index 43626fff48..7971196a25 100644 --- a/MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/SdMmcPciHci.c +++ b/MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/SdMmcPciHci.c @@ -931,6 +931,8 @@ SdMmcHcClockSupply ( } } + Private->Slot[Slot].CurrentFreq = ClockFreq; + return Status; } -- 2.14.1.windows.1 -------------------------------------------------------------------- Intel Technology Poland sp. z o.o. ul. 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