m68knommu: fix coldfire tcdrain
Fix tcdrain on coldfire uarts.
Currently with coldfire uarts tcdrain returns without waiting for txempty,
because (tx)fifosize is 0. Fix that and call uart_update_timeout when
setting the baud rate, otherwise tcdrain will wait for an half our :)
Also constify mcf_uart_ops.
Signed-off-by: Philippe De Muyter <phdm@macqel.be>
Signed-off-by: Greg Ungerer <gerg@uclinux.org>
diff --git a/arch/m68k/include/asm/mcfuart.h b/arch/m68k/include/asm/mcfuart.h
index ef22938..01a8716 100644
--- a/arch/m68k/include/asm/mcfuart.h
+++ b/arch/m68k/include/asm/mcfuart.h
@@ -212,5 +212,10 @@
#define MCFUART_URF_RXS 0xc0 /* Receiver status */
#endif
+#if defined(CONFIG_M5272)
+#define MCFUART_TXFIFOSIZE 25
+#else
+#define MCFUART_TXFIFOSIZE 1
+#endif
/****************************************************************************/
#endif /* mcfuart_h */
diff --git a/drivers/serial/mcf.c b/drivers/serial/mcf.c
index 7bb5fee..b9f7dfe 100644
--- a/drivers/serial/mcf.c
+++ b/drivers/serial/mcf.c
@@ -263,6 +263,7 @@
}
spin_lock_irqsave(&port->lock, flags);
+ uart_update_timeout(port, termios->c_cflag, baud);
writeb(MCFUART_UCR_CMDRESETRX, port->membase + MCFUART_UCR);
writeb(MCFUART_UCR_CMDRESETTX, port->membase + MCFUART_UCR);
writeb(MCFUART_UCR_CMDRESETMRPTR, port->membase + MCFUART_UCR);
@@ -379,6 +380,7 @@
static void mcf_config_port(struct uart_port *port, int flags)
{
port->type = PORT_MCF;
+ port->fifosize = MCFUART_TXFIFOSIZE;
/* Clear mask, so no surprise interrupts. */
writeb(0, port->membase + MCFUART_UIMR);
@@ -424,7 +426,7 @@
/*
* Define the basic serial functions we support.
*/
-static struct uart_ops mcf_uart_ops = {
+static const struct uart_ops mcf_uart_ops = {
.tx_empty = mcf_tx_empty,
.get_mctrl = mcf_get_mctrl,
.set_mctrl = mcf_set_mctrl,