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ArmPlatformPkg/PL180MciDxe: Clean code 

- Removed duplicated code
- Removed unreachable code

Signed-off-by: Olivier Martin <olivier.martin@arm.com>



git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@13588 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
oliviermartin 2012-08-02 14:25:17 +00:00
parent ebef1b7421
commit dad28de188
1 changed files with 13 additions and 42 deletions
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55
ArmPlatformPkg/Drivers/PL180MciDxe/PL180Mci.c
View File

@ -118,6 +118,7 @@ MciSendCommand (
UINT32 Cmd;
UINTN RetVal;
UINTN CmdCtrlReg;
UINT32 DoneMask;
RetVal = EFI_SUCCESS;
@ -146,54 +147,29 @@ MciSendCommand (
// Write to command register
MmioWrite32 (MCI_COMMAND_REG, Cmd);
if (Cmd & MCI_CPSM_WAIT_RESPONSE) {
DoneMask = (Cmd & MCI_CPSM_WAIT_RESPONSE)
? (MCI_STATUS_CMD_RESPEND | MCI_STATUS_CMD_ERROR)
: (MCI_STATUS_CMD_SENT | MCI_STATUS_CMD_ERROR);
do {
Status = MmioRead32 (MCI_STATUS_REG);
while (!(Status & (MCI_STATUS_CMD_RESPEND | MCI_STATUS_CMD_CMDCRCFAIL | MCI_STATUS_CMD_CMDTIMEOUT | MCI_STATUS_CMD_START_BIT_ERROR))) {
Status = MmioRead32(MCI_STATUS_REG);
}
} while (! (Status & DoneMask));
if ((Status & MCI_STATUS_CMD_ERROR)) {
// Clear Status register error flags
MmioWrite32 (MCI_CLEAR_STATUS_REG, MCI_STATUS_CMD_ERROR);
if ((Status & MCI_STATUS_CMD_START_BIT_ERROR)) {
DEBUG ((EFI_D_ERROR, "MciSendCommand(CmdIndex:%d) Start bit Error! Response:0x%X Status:0x%x\n", (Cmd & 0x3F), MmioRead32 (MCI_RESPONSE0_REG), Status));
RetVal = EFI_NO_RESPONSE;
goto Exit;
} else if ((Status & MCI_STATUS_CMD_CMDTIMEOUT)) {
//DEBUG ((EFI_D_ERROR, "MciSendCommand(CmdIndex:%d) TIMEOUT! Response:0x%X Status:0x%x\n", (Cmd & 0x3F), MmioRead32 (MCI_RESPONSE0_REG), Status));
RetVal = EFI_TIMEOUT;
goto Exit;
} else if ((! (MmcCmd & MMC_CMD_NO_CRC_RESPONSE)) && (Status & MCI_STATUS_CMD_CMDCRCFAIL)) {
} else if ((!(MmcCmd & MMC_CMD_NO_CRC_RESPONSE)) && (Status & MCI_STATUS_CMD_CMDCRCFAIL)) {
// The CMD1 and response type R3 do not contain CRC. We should ignore the CRC failed Status.
RetVal = EFI_CRC_ERROR;
goto Exit;
} else {
RetVal = EFI_SUCCESS;
goto Exit;
}
} else {
Status = MmioRead32(MCI_STATUS_REG);
while (!(Status & (MCI_STATUS_CMD_SENT | MCI_STATUS_CMD_CMDCRCFAIL | MCI_STATUS_CMD_CMDTIMEOUT| MCI_STATUS_CMD_START_BIT_ERROR))) {
Status = MmioRead32(MCI_STATUS_REG);
}
if ((Status & MCI_STATUS_CMD_START_BIT_ERROR)) {
DEBUG ((EFI_D_ERROR, "MciSendCommand(CmdIndex:%d) Start bit Error! Response:0x%X Status:0x%x\n",(Cmd & 0x3F),MmioRead32(MCI_RESPONSE0_REG),Status));
RetVal = EFI_NO_RESPONSE;
goto Exit;
} else if ((Status & MCI_STATUS_CMD_CMDTIMEOUT)) {
//DEBUG ((EFI_D_ERROR, "MciSendCommand(CmdIndex:%d) TIMEOUT! Response:0x%X Status:0x%x\n",(Cmd & 0x3F),MmioRead32(MCI_RESPONSE0_REG),Status));
RetVal = EFI_TIMEOUT;
goto Exit;
} else
if ((!(MmcCmd & MMC_CMD_NO_CRC_RESPONSE)) && (Status & MCI_STATUS_CMD_CMDCRCFAIL)) {
// The CMD1 does not contain CRC. We should ignore the CRC failed Status.
RetVal = EFI_CRC_ERROR;
goto Exit;
} else {
RetVal = EFI_SUCCESS;
goto Exit;
}
}
Exit:
// Disable Command Path
CmdCtrlReg = MmioRead32 (MCI_COMMAND_REG);
MmioWrite32 (MCI_COMMAND_REG, (CmdCtrlReg & ~MCI_CPSM_ENABLE));
@ -384,15 +360,11 @@ MciWriteBlockData (
Timer--;
}
if (Timer == 0) {
DEBUG ((EFI_D_ERROR, "MciWriteBlockData(): Data End timeout Number of bytes written 0x%x\n",Loop));
ASSERT (Timer > 0);
return EFI_TIMEOUT;
}
// Clear Status flags
MmioWrite32 (MCI_CLEAR_STATUS_REG, MCI_CLR_ALL_STATUS);
if (Timer == 0) {
DEBUG ((EFI_D_ERROR, "MciWriteBlockData(): Data End timeout Number of words written 0x%x\n", Loop));
RetVal = EFI_TIMEOUT;
}
@ -431,7 +403,6 @@ MciNotifyState (
// Setup clock
// - 0x1D = 29 => should be the clock divider to be less than 400kHz at MCLK = 24Mhz
MmioWrite32 (MCI_CLOCK_CONTROL_REG, 0x1D | MCI_CLOCK_ENABLE | MCI_CLOCK_POWERSAVE);
//MmioWrite32(MCI_CLOCK_CONTROL_REG,0x1D | MCI_CLOCK_ENABLE);
// Set the voltage
MmioWrite32 (MCI_POWER_CONTROL_REG, MCI_POWER_OPENDRAIN | (15<<2));