openwrt/target/linux/s3c24xx/patches-2.6.31/110-serial.patch

From 15f219822a30534756518cd8c4dfade95c4959c2 Mon Sep 17 00:00:00 2001
From: Lars-Peter Clausen <lars@metafoo.de>
Date: Tue, 21 Jul 2009 12:51:57 +0200
Subject: [PATCH] 110-serial.patch

---
 drivers/serial/samsung.c |   19 +++++++++++++++++++
 1 files changed, 19 insertions(+), 0 deletions(-)

diff --git a/drivers/serial/samsung.c b/drivers/serial/samsung.c
index bf0af79..64c35d1 100644
--- a/drivers/serial/samsung.c
+++ b/drivers/serial/samsung.c
@@ -1263,6 +1263,13 @@ module_exit(s3c24xx_serial_modexit);
 #ifdef CONFIG_SERIAL_SAMSUNG_CONSOLE
 
 static struct uart_port *cons_uart;
+static int cons_silenced;
+
+void s3c24xx_serial_console_set_silence(int silenced)
+{
+	cons_silenced = silenced;
+}
+EXPORT_SYMBOL(s3c24xx_serial_console_set_silence);
 
 static int
 s3c24xx_serial_console_txrdy(struct uart_port *port, unsigned int ufcon)
@@ -1287,9 +1294,21 @@ static void
 s3c24xx_serial_console_putchar(struct uart_port *port, int ch)
 {
 	unsigned int ufcon = rd_regl(cons_uart, S3C2410_UFCON);
+	unsigned int umcon = rd_regl(cons_uart, S3C2410_UMCON);
+
+	if (cons_silenced)
+		return;
+
+	/* If auto HW flow control enabled, temporarily turn it off */
+	if (umcon & S3C2410_UMCOM_AFC)
+		wr_regl(port, S3C2410_UMCON, (umcon & !S3C2410_UMCOM_AFC));
+
 	while (!s3c24xx_serial_console_txrdy(port, ufcon))
 		barrier();
 	wr_regb(cons_uart, S3C2410_UTXH, ch);
+
+	if (umcon & S3C2410_UMCOM_AFC)
+		wr_regl(port, S3C2410_UMCON, umcon);
 }
 
 static void
-- 
1.5.6.5