[edk2-devel] [PATCH 1/1] EmbeddedPkg: Add SD command support for DwEmmc
Loh, Tien Hock
tien.hock.loh at intel.com
Wed May 8 11:26:18 UTC 2019
From: "TIen Hock, Loh" <tien.hock.loh at intel.com>
Added ACMD6 for SD support. For SD, after CMD55 is sent, the next
command should be an application command, which should not expect
data
Signed-off-by: "Tien Hock, Loh" <tien.hock.loh at intel.com>
Cc: Leif Lindholm <leif.lindholm at linaro.org>
Cc: Ard Biesheuvel <ard.biesheuvel at linaro.org>
--
v2:
- Move IsACmd as a local static variable in function
- Fix some coding standard issue with spacing
---
EmbeddedPkg/Drivers/DwEmmcDxe/DwEmmcDxe.c | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)
diff --git a/EmbeddedPkg/Drivers/DwEmmcDxe/DwEmmcDxe.c b/EmbeddedPkg/Drivers/DwEmmcDxe/DwEmmcDxe.c
index 68c523a99f..420487757d 100644
--- a/EmbeddedPkg/Drivers/DwEmmcDxe/DwEmmcDxe.c
+++ b/EmbeddedPkg/Drivers/DwEmmcDxe/DwEmmcDxe.c
@@ -307,6 +307,7 @@ DwEmmcSendCommand (
{
UINT32 Cmd = 0;
EFI_STATUS Status = EFI_SUCCESS;
+ STATIC BOOLEAN IsACmd = FALSE;
switch (MMC_GET_INDX(MmcCmd)) {
case MMC_INDX(0):
@@ -323,6 +324,15 @@ DwEmmcSendCommand (
Cmd = BIT_CMD_RESPONSE_EXPECT | BIT_CMD_CHECK_RESPONSE_CRC |
BIT_CMD_SEND_INIT;
break;
+ case MMC_INDX (6):
+ if(IsACmd) {
+ Cmd = BIT_CMD_RESPONSE_EXPECT;
+ }
+ else {
+ Cmd = BIT_CMD_RESPONSE_EXPECT | BIT_CMD_DATA_EXPECTED |
+ BIT_CMD_READ;
+ }
+ break;
case MMC_INDX(7):
if (Argument)
Cmd = BIT_CMD_RESPONSE_EXPECT | BIT_CMD_CHECK_RESPONSE_CRC;
@@ -367,12 +377,22 @@ DwEmmcSendCommand (
Cmd = BIT_CMD_RESPONSE_EXPECT | BIT_CMD_CHECK_RESPONSE_CRC |
BIT_CMD_DATA_EXPECTED;
break;
+ case MMC_INDX (51):
+ Cmd = BIT_CMD_RESPONSE_EXPECT | BIT_CMD_DATA_EXPECTED |
+ BIT_CMD_READ | BIT_CMD_WAIT_PRVDATA_COMPLETE;
+ break;
default:
Cmd = BIT_CMD_RESPONSE_EXPECT | BIT_CMD_CHECK_RESPONSE_CRC;
break;
}
Cmd |= MMC_GET_INDX(MmcCmd) | BIT_CMD_USE_HOLD_REG | BIT_CMD_START;
+
+ if(MMC_INDX (55) == MMC_GET_INDX (MmcCmd))
+ IsACmd = TRUE;
+ else
+ IsACmd = FALSE;
+
if (IsPendingReadCommand (Cmd) || IsPendingWriteCommand (Cmd)) {
mDwEmmcCommand = Cmd;
mDwEmmcArgument = Argument;
--
2.19.0
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