diff options
Diffstat (limited to 'drivers/serial')
| -rw-r--r-- | drivers/serial/opencores_yanu.c | 22 |
1 files changed, 12 insertions, 10 deletions
diff --git a/drivers/serial/opencores_yanu.c b/drivers/serial/opencores_yanu.c index f18f7f4..f383011 100644 --- a/drivers/serial/opencores_yanu.c +++ b/drivers/serial/opencores_yanu.c @@ -69,7 +69,7 @@ void serial_setbrg (void) #else void serial_setbrg (void) -{ +{ int n, k; const unsigned max_uns = 0xFFFFFFFF; unsigned best_n, best_m, baud; @@ -114,12 +114,14 @@ int serial_init (void) YANU_ACTION_RFE | YANU_ACTION_RFIFO_CLEAR | YANU_ACTION_TFIFO_CLEAR; writel(action, &uart->action); - - /* control register cleanup */ - /* no interrupts enabled */ - /* one stop bit */ - /* hardware flow control disabled */ - /* 8 bits */ + + /* + * control register cleanup + * no interrupts enabled + * one stop bit + * hardware flow control disabled + * 8 bits + */ control = (0x7 << YANU_CONTROL_BITS_POS); /* enven parity just to be clean */ control |= YANU_CONTROL_PAREVEN; @@ -146,7 +148,7 @@ void serial_putc (char c) if (c == '\n') serial_putc ('\r'); - + while (1) { status = readl(&uart->status); tx_chars = (status>>YANU_TFIFO_CHARS_POS) @@ -174,13 +176,13 @@ int serial_tstc(void) status = readl(&uart->status); return (((status >> YANU_RFIFO_CHARS_POS) & ((1 << YANU_RFIFO_CHARS_N) - 1)) > 0); -} +} int serial_getc (void) { while (serial_tstc() == 0) WATCHDOG_RESET (); - + /* first we pull the char */ writel(YANU_ACTION_RFIFO_PULL, &uart->action); |