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EmbeddedPkg/Lan9118Dxe: Fix the reset after a receiver or transmitter error 

The Lan9118 driver did not recover after a receiver error as the error
handling code stopped the transmitter but did not restart it. Added the
restart of the transmitter.

Added also the restart of the receiver after a transmitter error and
the reactivation of the LEDs after all resets.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Ronald Cron <ronald.cron@arm.com>
Reviewed-by: Olivier Martin <olivier.martin@arm.com>




git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@17106 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
Ronald Cron 2015-04-02 13:49:05 +00:00 committed by oliviermartin
parent 88ff5ba793
commit ac8f1e103d
1 changed files with 31 additions and 10 deletions
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41
EmbeddedPkg/Drivers/Lan9118Dxe/Lan9118Dxe.c
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@ -434,6 +434,12 @@ SnpReset (
MmioWrite32 (LAN9118_PMT_CTRL, PmConf);
gBS->Stall (LAN9118_STALL);
// Reactivate the LEDs
Status = ConfigureHardware (HW_CONF_USE_LEDS, Snp);
if (EFI_ERROR (Status)) {
return Status;
}
// Check that a buffer size was specified in SnpInitialize
if (gTxBuffer != 0) {
HwConf = MmioRead32 (LAN9118_HW_CFG); // Read the HW register
@ -1062,19 +1068,28 @@ SnpGetStatus (
if (Interrupts & INSTS_TXE) {
DEBUG ((EFI_D_ERROR, "LAN9118: Transmitter error. Restarting..."));
// Initiate a software reset
// Software reset, the TXE interrupt is cleared by the reset.
Status = SoftReset (0, Snp);
if (EFI_ERROR (Status)) {
DEBUG ((EFI_D_ERROR, "\n\tSoft Reset Failed: Hardware Error\n"));
return EFI_DEVICE_ERROR;
}
// Acknowledge the TXE
MmioWrite32 (LAN9118_INT_STS, INSTS_TXE);
gBS->Stall (LAN9118_STALL);
// Reactivate the LEDs
Status = ConfigureHardware (HW_CONF_USE_LEDS, Snp);
if (EFI_ERROR (Status)) {
return Status;
}
// Restart the transmitter
//
// Restart the transmitter and if necessary the receiver.
// Do not ask for FIFO reset as it has already been done
// by SoftReset().
//
StartTx (START_TX_MAC | START_TX_CFG, Snp);
if (Snp->Mode->ReceiveFilterSetting != 0) {
StartRx (0, Snp);
}
}
// Update the media status
@ -1442,19 +1457,25 @@ SnpReceive (
if (MmioRead32 (LAN9118_INT_STS) & INSTS_RXE) {
DEBUG ((EFI_D_WARN, "Warning: Receiver Error. Restarting...\n"));
// Initiate a software reset
// Software reset, the RXE interrupt is cleared by the reset.
Status = SoftReset (0, Snp);
if (EFI_ERROR (Status)) {
DEBUG ((EFI_D_ERROR, "Error: Soft Reset Failed: Hardware Error.\n"));
return EFI_DEVICE_ERROR;
}
// Acknowledge the RXE
MmioWrite32 (LAN9118_INT_STS, INSTS_RXE);
gBS->Stall (LAN9118_STALL);
// Reactivate the LEDs
Status = ConfigureHardware (HW_CONF_USE_LEDS, Snp);
if (EFI_ERROR (Status)) {
return Status;
}
// Restart the rx (and do not clear FIFO)
//
// Restart the receiver and the transmitter without reseting the FIFOs
// as it has been done by SoftReset().
//
StartRx (0, Snp);
StartTx (START_TX_MAC | START_TX_CFG, Snp);
// Say that command could not be sent
return EFI_DEVICE_ERROR;