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sh: drain and wait for early printk

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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 <damm@igel.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Magnus Damm 2008-04-23 21:05:11 +09:00 committed by Paul Mundt
parent 0fba321365
commit 4a65e3827b
1 changed files with 6 additions and 0 deletions
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6
arch/sh/kernel/early_printk.c
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@ -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);