diff options
Diffstat (limited to 'ArmPlatformPkg/Drivers')
| -rw-r--r-- | ArmPlatformPkg/Drivers/PL011Uart/PL011Uart.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/ArmPlatformPkg/Drivers/PL011Uart/PL011Uart.c b/ArmPlatformPkg/Drivers/PL011Uart/PL011Uart.c index 7e74a05df7..8b256de945 100644 --- a/ArmPlatformPkg/Drivers/PL011Uart/PL011Uart.c +++ b/ArmPlatformPkg/Drivers/PL011Uart/PL011Uart.c @@ -50,12 +50,15 @@ PL011UartInitializePort ( LineControl = 0;
- // The PL011 supports a buffer of either 1 or 32 chars. Therefore we can accept
+ // The PL011 supports a buffer of 1, 16 or 32 chars. Therefore we can accept
// 1 char buffer as the minimum fifo size. Because everything can be rounded down,
// there is no maximum fifo size.
if ((*ReceiveFifoDepth == 0) || (*ReceiveFifoDepth >= 32)) {
LineControl |= PL011_UARTLCR_H_FEN;
- *ReceiveFifoDepth = 32;
+ if (PL011_UARTPID2_VER (MmioRead32 (UartBase + UARTPID2)) > PL011_VER_R1P4)
+ *ReceiveFifoDepth = 32;
+ else
+ *ReceiveFifoDepth = 16;
} else {
ASSERT (*ReceiveFifoDepth < 32);
// Nothing else to do. 1 byte fifo is default.
|