From 2d5b561e2bfdee8552a99b2cf93016cce2a74895 Mon Sep 17 00:00:00 2001
From: wdenk <wdenk>
Date: Tue, 14 Oct 2003 19:43:55 +0000
Subject: * Make sure HUSH is initialized for running auto-update scripts

* Make 5200 reset command _really_ reset the board, without running
  any other code after it

* Fix flash mapping and display on P3G4 board

* Patch by Kyle Harris, 15 Jul 2003:
  - add support for Intel IXP425 CPU
  - add support for IXDP425 eval board
---
 cpu/ixp/serial.c | 125 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 125 insertions(+)
 create mode 100644 cpu/ixp/serial.c

(limited to 'cpu/ixp/serial.c')

diff --git a/cpu/ixp/serial.c b/cpu/ixp/serial.c
new file mode 100644
index 0000000..aea0cf8
--- /dev/null
+++ b/cpu/ixp/serial.c
@@ -0,0 +1,125 @@
+/*
+ * (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 <asm/arch/ixp425.h>
+
+void serial_setbrg (void)
+{
+	DECLARE_GLOBAL_DATA_PTR;
+
+	unsigned int quot = 0;
+	int uart = CFG_IXP425_CONSOLE;
+
+	if (gd->baudrate == 1200)
+		quot = 192;
+	else if (gd->baudrate == 9600)
+		quot = 96;
+	else if (gd->baudrate == 19200)
+		quot = 48;
+	else if (gd->baudrate == 38400)
+		quot = 24;
+	else if (gd->baudrate == 57600)
+		quot = 16;
+	else if (gd->baudrate == 115200)
+		quot = 8;
+	else
+		hang ();
+
+	IER(uart) = 0;					/* Disable for now */
+	FCR(uart) = 0;					/* No fifos enabled */
+
+	/* set baud rate */
+	LCR(uart) = LCR_WLS0 | LCR_WLS1 | LCR_DLAB;
+	DLL(uart) = quot & 0xff;
+	DLH(uart) = quot >> 8;
+	LCR(uart) = LCR_WLS0 | LCR_WLS1;
+
+	IER(uart) = IER_UUE;
+}
+
+
+/*
+ * 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)
+{
+	/* wait for room in the tx FIFO on UART */
+	while ((LSR(CFG_IXP425_CONSOLE) & LSR_TEMT) == 0);
+
+	THR(CFG_IXP425_CONSOLE) = c;
+
+	/* If \n, also do \r */
+	if (c == '\n')
+		serial_putc ('\r');
+}
+
+/*
+ * 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 LSR(CFG_IXP425_CONSOLE) & LSR_DR;
+}
+
+/*
+ * 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 (!(LSR(CFG_IXP425_CONSOLE) & LSR_DR));
+
+	return (char) RBR(CFG_IXP425_CONSOLE) & 0xff;
+}
+
+void
+serial_puts (const char *s)
+{
+	while (*s) {
+		serial_putc (*s++);
+	}
+}
-- 
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