From 4a65e3827bcff072e5f4a96b3f73f9f17eb7d6d8 Mon Sep 17 00:00:00 2001 From: Magnus Damm Date: Wed, 23 Apr 2008 21:05:11 +0900 Subject: sh: drain and wait for early printk Drain by waiting for all characters to be sent, and make sure to wait a little bit after setting up the baud rate. Signed-off-by: Magnus Damm Signed-off-by: Paul Mundt --- arch/sh/kernel/early_printk.c | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'arch/sh') diff --git a/arch/sh/kernel/early_printk.c b/arch/sh/kernel/early_printk.c index 18ca249e8409..11b4c85999b7 100644 --- a/arch/sh/kernel/early_printk.c +++ b/arch/sh/kernel/early_printk.c @@ -143,6 +143,7 @@ static void scif_sercon_init(char *s) { struct uart_port *port = &scif_port; unsigned baud = DEFAULT_BAUD; + unsigned int status; char *e; if (*s == ',') @@ -161,12 +162,17 @@ static void scif_sercon_init(char *s) baud = DEFAULT_BAUD; } + do { + status = sci_in(port, SCxSR); + } while (!(status & SCxSR_TEND(port))); + sci_out(port, SCSCR, 0); /* TE=0, RE=0 */ sci_out(port, SCSMR, 0); /* Set baud rate */ sci_out(port, SCBRR, (CONFIG_SH_PCLK_FREQ + 16 * baud) / (32 * baud) - 1); + udelay((1000000+(baud-1)) / baud); /* Wait one bit interval */ sci_out(port, SCFCR, 12); sci_out(port, SCFCR, 8); -- cgit v1.2.3-70-g09d2