Initial revision

1 files changed, 126 insertions, 0 deletions

diff --git a/cpu/arm720t/serial.c b/cpu/arm720t/serial.c
new file mode 100644
index 0000000..d38ac39
--- /dev/null
+++ b/cpu/arm720t/serial.c
@@ -0,0 +1,126 @@
+/*
+ * (C) Copyright 2002
+ * Wolfgang Denk, DENX Software Engineering, <wd@denx.de>
+ *
+ * (C) Copyright 2002
+ * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
+ * Marius Groeger <mgroeger@sysgo.de>
+ *
+ * (C) Copyright 2002
+ * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
+ * Alex Zuepke <azu@sysgo.de>
+ *
+ * Copyright (C) 1999 2000 2001 Erik Mouw (J.A.K.Mouw@its.tudelft.nl)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ */
+
+#include <common.h>
+#include <clps7111.h>
+
+void serial_setbrg (void)
+{
+	DECLARE_GLOBAL_DATA_PTR;
+
+	unsigned int reg = 0;
+
+	if (gd->baudrate == 1200)
+		reg = 191;
+	else if (gd->baudrate == 9600)
+		reg = 23;
+	else if (gd->baudrate == 19200)
+		reg = 11;
+	else if (gd->baudrate == 38400)
+		reg = 5;
+	else if (gd->baudrate == 57600)
+		reg = 3;
+	else if (gd->baudrate == 115200)
+		reg = 1;
+	else
+		hang ();
+
+	/* init serial serial 1,2 */
+	IO_SYSCON1 = SYSCON1_UART1EN;
+	IO_SYSCON2 = SYSCON2_UART2EN;
+
+	reg |= UBRLCR_WRDLEN8;
+
+	IO_UBRLCR1 = reg;
+	IO_UBRLCR2 = reg;
+}
+
+
+/*
+ * Initialise the serial port with the given baudrate. The settings
+ * are always 8 data bits, no parity, 1 stop bit, no start bits.
+ *
+ */
+int serial_init (void)
+{
+	serial_setbrg ();
+
+	return (0);
+}
+
+
+/*
+ * Output a single byte to the serial port.
+ */
+void serial_putc (const char c)
+{
+	int tmo;
+
+	/* If \n, also do \r */
+	if (c == '\n')
+		serial_putc ('\r');
+
+	tmo = get_timer (0) + 1 * CFG_HZ;
+	while (IO_SYSFLG1 & SYSFLG1_UTXFF)
+		if (get_timer (0) > tmo)
+			break;
+
+	IO_UARTDR1 = c;
+}
+
+/*
+ * Read a single byte from the serial port. Returns 1 on success, 0
+ * otherwise. When the function is succesfull, the character read is
+ * written into its argument c.
+ */
+int serial_tstc (void)
+{
+	return !(IO_SYSFLG1 & SYSFLG1_URXFE);
+}
+
+/*
+ * Read a single byte from the serial port. Returns 1 on success, 0
+ * otherwise. When the function is succesfull, the character read is
+ * written into its argument c.
+ */
+int serial_getc (void)
+{
+	while (IO_SYSFLG1 & SYSFLG1_URXFE);
+
+	return IO_UARTDR1 & 0xff;
+}
+
+void
+serial_puts (const char *s)
+{
+	while (*s) {
+		serial_putc (*s++);
+	}
+}