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authorLars-Peter Clausen <lars@metafoo.de>2009-10-05 14:27:40 +0200
committerLars-Peter Clausen <lars@metafoo.de>2009-10-05 14:27:40 +0200
commitf18747471824081f8466380a4b182fd8a7902956 (patch)
tree3477c132acffc4426fb976e08bd11dc9a3acb562 /drivers
parentab5849e9a9e05749ef2f687e9ae5b4265a577a7f (diff)
Add s3c24xx_serial_console_set_silence
Diffstat (limited to 'drivers')
-rw-r--r--drivers/serial/samsung.c19
1 files changed, 19 insertions, 0 deletions
diff --git a/drivers/serial/samsung.c b/drivers/serial/samsung.c
index c8851a0db63..7d0616495bf 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