Hi Haojian,
I've had time to investigate where TC2 is hanging with your patches
applied and narrowed it down to the single line of code marked below.
I'm going to read the code now and see if I can work out what it's
trying to do, but I thought I'd tell you sooner because you might have
a better idea.
On 22 March 2016 at 12:48, Haojian Zhuang <haojian.zhu...@linaro.org> wrote:
> Add more SD commands to support 4-bit bus width & iospeed. It's not
> formal code. And it needs to be updated later.
>
> Contributed-under: TianoCore Contribution Agreement 1.0
> Signed-off-by: Haojian Zhuang <haojian.zhu...@linaro.org>
> ---
> EmbeddedPkg/Include/Protocol/MmcHost.h | 3 +
> EmbeddedPkg/Universal/MmcDxe/Mmc.h | 17 +++
> EmbeddedPkg/Universal/MmcDxe/MmcIdentification.c | 138
> ++++++++++++++++++++---
> 3 files changed, 142 insertions(+), 16 deletions(-)
>
> diff --git a/EmbeddedPkg/Include/Protocol/MmcHost.h
> b/EmbeddedPkg/Include/Protocol/MmcHost.h
> index 5e3a2b7..e9a74f0 100644
> --- a/EmbeddedPkg/Include/Protocol/MmcHost.h
> +++ b/EmbeddedPkg/Include/Protocol/MmcHost.h
> @@ -64,11 +64,14 @@ typedef UINT32 MMC_CMD;
> #define MMC_CMD24 (MMC_INDX(24) | MMC_CMD_WAIT_RESPONSE)
> #define MMC_CMD55 (MMC_INDX(55) | MMC_CMD_WAIT_RESPONSE)
> #define MMC_ACMD41 (MMC_INDX(41) | MMC_CMD_WAIT_RESPONSE |
> MMC_CMD_NO_CRC_RESPONSE)
> +#define MMC_ACMD51 (MMC_INDX(51) | MMC_CMD_WAIT_RESPONSE)
>
> // Valid responses for CMD1 in eMMC
> #define EMMC_CMD1_CAPACITY_LESS_THAN_2GB 0x00FF8080 // Capacity <= 2GB, byte
> addressing used
> #define EMMC_CMD1_CAPACITY_GREATER_THAN_2GB 0x40FF8080 // Capacity > 2GB,
> 512-byte sector addressing used
>
> +#define MMC_STATUS_APP_CMD (1 << 5)
> +
> typedef enum _MMC_STATE {
> MmcInvalidState = 0,
> MmcHwInitializationState,
> diff --git a/EmbeddedPkg/Universal/MmcDxe/Mmc.h
> b/EmbeddedPkg/Universal/MmcDxe/Mmc.h
> index 0ccbc80..a62ba32 100644
> --- a/EmbeddedPkg/Universal/MmcDxe/Mmc.h
> +++ b/EmbeddedPkg/Universal/MmcDxe/Mmc.h
> @@ -75,6 +75,23 @@ typedef struct {
> UINT32 PowerUp: 1; // This bit is set to LOW if the card has not
> finished the power up routine
> } OCR;
>
> +/* For little endian CPU */
> +typedef struct {
> + UINT8 SD_SPEC: 4; // SD Memory Card - Spec. Version [59:56]
> + UINT8 SCR_STRUCTURE: 4; // SCR Structure [63:60]
> + UINT8 SD_BUS_WIDTHS: 4; // DAT Bus widths supported [51:48]
> + UINT8 DATA_STAT_AFTER_ERASE: 1; // Data Status after erases [55]
> + UINT8 SD_SECURITY: 3; // CPRM Security Support [54:52]
> + UINT8 EX_SECURITY_1: 1; // Extended Security Support [43]
> + UINT8 SD_SPEC4: 1; // Spec. Version 4.00 or higher [42]
> + UINT8 RESERVED_1: 2; // Reserved [41:40]
> + UINT8 SD_SPEC3: 1; // Spec. Version 3.00 or higher [47]
> + UINT8 EX_SECURITY_2: 3; // Extended Security Support [46:44]
> + UINT8 CMD_SUPPORT: 4; // Command Support bits [35:32]
> + UINT8 RESERVED_2: 4; // Reserved [39:36]
> + UINT32 RESERVED_3; // Manufacturer Usage [31:0]
> +} SCR;
> +
> typedef struct {
> UINT32 NOT_USED; // 1 [0:0]
> UINT32 CRC; // CRC7 checksum [7:1]
> diff --git a/EmbeddedPkg/Universal/MmcDxe/MmcIdentification.c
> b/EmbeddedPkg/Universal/MmcDxe/MmcIdentification.c
> index f806bfc..125d3f9 100644
> --- a/EmbeddedPkg/Universal/MmcDxe/MmcIdentification.c
> +++ b/EmbeddedPkg/Universal/MmcDxe/MmcIdentification.c
> @@ -12,6 +12,9 @@
> *
> **/
>
> +#include <Library/BaseMemoryLib.h>
> +#include <Library/TimerLib.h>
> +
> #include "Mmc.h"
>
> typedef union {
> @@ -41,6 +44,11 @@ typedef union {
>
> #define EMMC_SWITCH_ERROR (1 << 7)
>
> +#define SD_BUS_WIDTH_1BIT (1 << 0)
> +#define SD_BUS_WIDTH_4BIT (1 << 2)
> +
> +#define SD_CCC_SWITCH (1 << 10)
> +
> #define DEVICE_STATE(x) (((x) >> 9) & 0xf)
> typedef enum _EMMC_DEVICE_STATE {
> EMMC_IDLE_STATE = 0,
> @@ -69,28 +77,30 @@ EmmcGetDeviceState (
> {
> EFI_MMC_HOST_PROTOCOL *Host;
> EFI_STATUS Status;
> - UINT32 Data, RCA;
> + UINT32 Rsp[4], RCA;
>
> if (State == NULL)
> return EFI_INVALID_PARAMETER;
>
> Host = MmcHostInstance->MmcHost;
> RCA = MmcHostInstance->CardInfo.RCA << RCA_SHIFT_OFFSET;
> - Status = Host->SendCommand (Host, MMC_CMD13, RCA);
> - if (EFI_ERROR (Status)) {
> - DEBUG ((EFI_D_ERROR, "EmmcGetDeviceState(): Failed to get card status,
> Status=%r.\n", Status));
> - return Status;
> - }
> - Status = Host->ReceiveResponse (Host, MMC_RESPONSE_TYPE_R1, &Data);
> - if (EFI_ERROR (Status)) {
> - DEBUG ((EFI_D_ERROR, "EmmcGetDeviceState(): Failed to get response of
> CMD13, Status=%r.\n", Status));
> - return Status;
> - }
> - if (Data & EMMC_SWITCH_ERROR) {
> - DEBUG ((EFI_D_ERROR, "EmmcGetDeviceState(): Failed to switch expected
> mode, Status=%r.\n", Status));
> - return EFI_DEVICE_ERROR;
> - }
> - *State = DEVICE_STATE(Data);
> + do {
> + Status = Host->SendCommand (Host, MMC_CMD13, RCA);
> + if (EFI_ERROR (Status)) {
> + DEBUG ((EFI_D_ERROR, "EmmcGetDeviceState(): Failed to get card status,
> Status=%r.\n", Status));
> + return Status;
> + }
> + Status = Host->ReceiveResponse (Host, MMC_RESPONSE_TYPE_R1, Rsp);
> + if (EFI_ERROR (Status)) {
> + DEBUG ((EFI_D_ERROR, "EmmcGetDeviceState(): Failed to get response of
> CMD13, Status=%r.\n", Status));
> + return Status;
> + }
> + if (Rsp[0] & EMMC_SWITCH_ERROR) {
> + DEBUG ((EFI_D_ERROR, "EmmcGetDeviceState(): Failed to switch expected
> mode, Status=%r.\n", Status));
> + return EFI_DEVICE_ERROR;
> + }
> + } while (!(Rsp[0] & MMC_R0_READY_FOR_DATA));
> + *State = MMC_R0_CURRENTSTATE(Rsp);
> return EFI_SUCCESS;
> }
>
> @@ -305,9 +315,12 @@ InitializeSdMmcDevice (
> {
> UINT32 CmdArg;
> UINT32 Response[4];
> + UINT32 Buffer[128];
> UINTN BlockSize;
> UINTN CardSize;
> UINTN NumBlocks;
> + BOOLEAN CccSwitch;
> + SCR Scr;
> EFI_STATUS Status;
> EFI_MMC_HOST_PROTOCOL *MmcHost;
>
> @@ -328,6 +341,10 @@ InitializeSdMmcDevice (
> return Status;
> }
> PrintCSD (Response);
> + if (MMC_CSD_GET_CCC(Response) & SD_CCC_SWITCH)
> + CccSwitch = TRUE;
> + else
> + CccSwitch = FALSE;
>
> if (MmcHostInstance->CardInfo.CardType == SD_CARD_2_HIGH) {
> CardSize = HC_MMC_CSD_GET_DEVICESIZE (Response);
> @@ -358,6 +375,95 @@ InitializeSdMmcDevice (
> return Status;
> }
>
> + Status = MmcHost->SendCommand (MmcHost, MMC_CMD55, CmdArg);
> + if (EFI_ERROR (Status)) {
> + DEBUG ((EFI_D_ERROR, "%a(MMC_CMD55): Error and Status = %r\n", Status));
> + return Status;
> + }
> + Status = MmcHost->ReceiveResponse (MmcHost, MMC_RESPONSE_TYPE_R1,
> Response);
> + if (EFI_ERROR (Status)) {
> + DEBUG ((EFI_D_ERROR, "%a(MMC_CMD55): Error and Status = %r\n", Status));
> + return Status;
> + }
> + if ((Response[0] & MMC_STATUS_APP_CMD) == 0)
> + return EFI_SUCCESS;
> +
> + /* SCR */
> + Status = MmcHost->SendCommand (MmcHost, MMC_ACMD51, 0);
> + if (EFI_ERROR (Status)) {
> + DEBUG ((EFI_D_ERROR, "%a(MMC_ACMD51): Error and Status = %r\n",
> __func__, Status));
> + return Status;
> + } else {
> + Status = MmcHost->ReadBlockData (MmcHost, 0, 8, Buffer);
^^ TC2 hangs at this line
> + if (EFI_ERROR (Status)) {
> + DEBUG ((EFI_D_ERROR, "%a(MMC_ACMD51): ReadBlockData Error and Status =
> %r\n", __func__, Status));
> + return Status;
> + }
> + CopyMem (&Scr, Buffer, 8);
> + if (Scr.SD_SPEC == 2) {
> + if (Scr.SD_SPEC3 == 1) {
> + if (Scr.SD_SPEC4 == 1) {
> + DEBUG ((EFI_D_INFO, "Found SD Card for Spec Version 4.xx\n"));
> + } else {
> + DEBUG ((EFI_D_INFO, "Found SD Card for Spec Version 3.0x\n"));
> + }
> + } else {
> + if (Scr.SD_SPEC4 == 0) {
> + DEBUG ((EFI_D_INFO, "Found SD Card for Spec Version 2.0\n"));
> + } else {
> + DEBUG ((EFI_D_ERROR, "Found invalid SD Card\n"));
> + }
> + }
> + } else {
> + if ((Scr.SD_SPEC3 == 0) && (Scr.SD_SPEC4 == 0)) {
> + if (Scr.SD_SPEC == 1) {
> + DEBUG ((EFI_D_INFO, "Found SD Card for Spec Version 1.10\n"));
> + } else {
> + DEBUG ((EFI_D_INFO, "Found SD Card for Spec Version 1.0\n"));
> + }
> + } else {
> + DEBUG ((EFI_D_ERROR, "Found invalid SD Card\n"));
> + }
> + }
> + }
> + if (CccSwitch) {
> + /* SD Switch, Mode:1, Group:0, Value:1 */
> + CmdArg = 1 << 31 | 0x00FFFFFF;
> + CmdArg &= ~(0xF << (0 * 4));
> + CmdArg |= 1 << (0 * 4);
> + Status = MmcHost->SendCommand (MmcHost, MMC_CMD6, CmdArg);
> + if (EFI_ERROR (Status)) {
> + DEBUG ((EFI_D_ERROR, "%a(MMC_CMD6): Error and Status = %r\n", Status));
> + return Status;
> + } else {
> + Status = MmcHost->ReadBlockData (MmcHost, 0, 64, Buffer);
> + if (EFI_ERROR (Status)) {
> + DEBUG ((EFI_D_ERROR, "%a(MMC_CMD6): ReadBlockData Error and Status =
> %r\n", Status));
> + return Status;
> + }
> + }
> + }
> + if (Scr.SD_BUS_WIDTHS & SD_BUS_WIDTH_4BIT) {
> + CmdArg = MmcHostInstance->CardInfo.RCA << 16;
> + Status = MmcHost->SendCommand (MmcHost, MMC_CMD55, CmdArg);
> + if (EFI_ERROR (Status)) {
> + DEBUG ((EFI_D_ERROR, "%a(MMC_CMD55): Error and Status = %r\n",
> Status));
> + return Status;
> + }
> + /* Width: 4 */
> + Status = MmcHost->SendCommand (MmcHost, MMC_CMD6, 2);
> + if (EFI_ERROR (Status)) {
> + DEBUG ((EFI_D_ERROR, "%a(MMC_CMD6): Error and Status = %r\n", Status));
> + return Status;
> + }
> + }
> + if (MmcHost->SetIos) {
> + Status = MmcHost->SetIos (MmcHost, 24 * 1000 * 1000, 4, EMMCBACKWARD);
> + if (EFI_ERROR (Status)) {
> + DEBUG ((EFI_D_ERROR, "%a(SetIos): Error and Status = %r\n", Status));
> + return Status;
> + }
> + }
> return EFI_SUCCESS;
> }
>
> --
> 1.9.1
>
_______________________________________________
edk2-devel mailing list
edk2-devel@lists.01.org
https://lists.01.org/mailman/listinfo/edk2-devel
