[SERIAL] kernel console should send CRLF not LFCR

Glen Turner reported that writing LFCR rather than the more
traditional CRLF causes issues with some terminals.

Since this aflicts many serial drivers, extract the common code
to a library function (uart_console_write) and arrange for each
driver to supply a "putchar" function.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 11 insertions, 12 deletions

diff --git a/drivers/serial/pmac_zilog.c b/drivers/serial/pmac_zilog.c
index 9b7ed58cb53..513ff859770 100644
--- a/drivers/serial/pmac_zilog.c
+++ b/drivers/serial/pmac_zilog.c
@@ -1916,6 +1916,16 @@ static void __exit exit_pmz(void)
 
 #ifdef CONFIG_SERIAL_PMACZILOG_CONSOLE
 
+static void pmz_console_putchar(struct uart_port *port, int ch)
+{
+	struct uart_pmac_port *uap = (struct uart_pmac_port *)port;
+
+	/* Wait for the transmit buffer to empty. */
+	while ((read_zsreg(uap, R0) & Tx_BUF_EMP) == 0)
+		udelay(5);
+	write_zsdata(uap, ch);
+}
+
 /*
  * Print a string to the serial port trying not to disturb
  * any possible real use of the port...
@@ -1924,7 +1934,6 @@ static void pmz_console_write(struct console *con, const char *s, unsigned int c
 {
 	struct uart_pmac_port *uap = &pmz_ports[con->index];
 	unsigned long flags;
-	int i;
 
 	if (ZS_IS_ASLEEP(uap))
 		return;
@@ -1934,17 +1943,7 @@ static void pmz_console_write(struct console *con, const char *s, unsigned int c
 	write_zsreg(uap, R1, uap->curregs[1] & ~TxINT_ENAB);
 	write_zsreg(uap, R5, uap->curregs[5] | TxENABLE | RTS | DTR);
 
-	for (i = 0; i < count; i++) {
-		/* Wait for the transmit buffer to empty. */
-		while ((read_zsreg(uap, R0) & Tx_BUF_EMP) == 0)
-			udelay(5);
-		write_zsdata(uap, s[i]);
-		if (s[i] == 10) {
-			while ((read_zsreg(uap, R0) & Tx_BUF_EMP) == 0)
-				udelay(5);
-			write_zsdata(uap, R13);
-		}
-	}
+	uart_console_write(&uap->port, s, count, pmz_console_putchar);
 
 	/* Restore the values in the registers. */
 	write_zsreg(uap, R1, uap->curregs[1]);