[PATCH 2/3] 8250: serial driver changes for XBurst SoCs.

[Graham Gower <graham.gower@gmail.com>]

Signed-off-by: Graham Gower <graham.gower@gmail.com>
---
 drivers/serial/8250.c |   12 ++++++++++++
 1 files changed, 12 insertions(+), 0 deletions(-)

diff --git a/drivers/serial/8250.c b/drivers/serial/8250.c
index e9b15c3..dfe6640 100644
--- a/drivers/serial/8250.c
+++ b/drivers/serial/8250.c
@@ -199,7 +199,11 @@ static const struct serial8250_config uart_config[] = {
 	[PORT_16550A] = {
 		.name		= "16550A",
 		.fifo_size	= 16,
+#ifndef CONFIG_XBURST
 		.tx_loadsz	= 16,
+#else
+		.tx_loadsz	= 8,
+#endif
 		.fcr		= UART_FCR_ENABLE_FIFO | UART_FCR_R_TRIG_10,
 		.flags		= UART_CAP_FIFO,
 	},
@@ -406,6 +410,10 @@ static unsigned int mem_serial_in(struct uart_port *p, int offset)
 static void mem_serial_out(struct uart_port *p, int offset, int value)
 {
 	offset = map_8250_out_reg(p, offset) << p->regshift;
+#if defined(CONFIG_XBURST)
+	if (offset == (UART_FCR << p->regshift))
+		value |= 0x10; /* set FCR.UUE */
+#endif
 	writeb(value, p->membase + offset);
 }
 
@@ -2354,6 +2362,10 @@ serial8250_set_termios(struct uart_port *port, struct ktermios *termios,
 	if (up->capabilities & UART_CAP_UUE)
 		up->ier |= UART_IER_UUE | UART_IER_RTOIE;
 
+#ifdef CONFIG_XBURST
+	up->ier |= UART_IER_RTOIE; /* Set this flag, or very slow */
+#endif
+
 	serial_out(up, UART_IER, up->ier);
 
 	if (up->capabilities & UART_CAP_EFR) {
-- 
1.6.4