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authorTom Rini <trini@ti.com>2014-09-17 18:01:04 -0400
committerTom Rini <trini@ti.com>2014-09-17 18:01:04 -0400
commite38b15b0619f9a8b869896229355808f494fb2ac (patch)
tree2048b9e715f1d6f76b298bf404d4b2e293ae3b0c /drivers/serial/serial_lpuart.c
parent1ee30aeed47724eb7c8f145f064b8d03cd294808 (diff)
parentc292adae170fa8c27dca75963bdb0a9afc640e57 (diff)
Merge branch 'master' of git://git.denx.de/u-boot-arm
Diffstat (limited to 'drivers/serial/serial_lpuart.c')
-rw-r--r--drivers/serial/serial_lpuart.c19
1 files changed, 13 insertions, 6 deletions
diff --git a/drivers/serial/serial_lpuart.c b/drivers/serial/serial_lpuart.c
index b0c6f6f4ab..63fc388b26 100644
--- a/drivers/serial/serial_lpuart.c
+++ b/drivers/serial/serial_lpuart.c
@@ -14,8 +14,13 @@
#define US1_TDRE (1 << 7)
#define US1_RDRF (1 << 5)
+#define US1_OR (1 << 3)
#define UC2_TE (1 << 3)
#define UC2_RE (1 << 2)
+#define CFIFO_TXFLUSH (1 << 7)
+#define CFIFO_RXFLUSH (1 << 6)
+#define SFIFO_RXOF (1 << 2)
+#define SFIFO_RXUF (1 << 0)
#define STAT_LBKDIF (1 << 31)
#define STAT_RXEDGIF (1 << 30)
@@ -62,14 +67,10 @@ static void lpuart_serial_setbrg(void)
static int lpuart_serial_getc(void)
{
- u8 status;
-
- while (!(__raw_readb(&base->us1) & US1_RDRF))
+ while (!(__raw_readb(&base->us1) & (US1_RDRF | US1_OR)))
WATCHDOG_RESET();
- status = __raw_readb(&base->us1);
- status |= US1_RDRF;
- __raw_writeb(status, &base->us1);
+ barrier();
return __raw_readb(&base->ud);
}
@@ -112,6 +113,12 @@ static int lpuart_serial_init(void)
__raw_writeb(0, &base->umodem);
__raw_writeb(0, &base->uc1);
+ /* Disable FIFO and flush buffer */
+ __raw_writeb(0x0, &base->upfifo);
+ __raw_writeb(0x0, &base->utwfifo);
+ __raw_writeb(0x1, &base->urwfifo);
+ __raw_writeb(CFIFO_TXFLUSH | CFIFO_RXFLUSH, &base->ucfifo);
+
/* provide data bits, parity, stop bit, etc */
serial_setbrg();