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-rw-r--r--cpu/ixp/serial.c125
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diff --git a/cpu/ixp/serial.c b/cpu/ixp/serial.c
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+/*
+ * (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++);
+ }
+}