From 4a5517094dd30bb1f271403b62e23053301668e6 Mon Sep 17 00:00:00 2001
From: wdenk <wdenk>
Date: Wed, 8 Oct 2003 23:26:14 +0000
Subject: * Patch by Scott McNutt, 04 Oct 2003:   - add support for Altera
 Nios-32 CPU   - add support for Nios Cyclone Development Kit (DK-1C20)

* Patch by Steven Scholz, 29 Sep 2003:
  - A second parameter for bootm overwrites the load address for
    "Standalone Application" images.
  - bootm sets environment variable "filesize" to the resulting
    (uncompressed) data length for "Standalone Application" images
    when autostart is set to "no". Now you can do something like
       if bootm $fpgadata $some_free_ram ; then
               fpga load 0 $some_free_ram $filesize
       fi

* Patch by Denis Peter, 25 Sept 2003:
  add support for the MIP405 Rev. C board
---
 cpu/nios/serial.c | 86 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 86 insertions(+)
 create mode 100644 cpu/nios/serial.c

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

diff --git a/cpu/nios/serial.c b/cpu/nios/serial.c
new file mode 100644
index 0000000000..61b26ab149
--- /dev/null
+++ b/cpu/nios/serial.c
@@ -0,0 +1,86 @@
+/*
+ * (C) Copyright 2003, Psyent Corporation <www.psyent.com>
+ * Scott McNutt <smcnutt@psyent.com>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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 <nios-io.h>
+
+
+static nios_uart_t *uart = (nios_uart_t *)CFG_NIOS_CONSOLE;
+
+#if defined(CFG_NIOS_FIXEDBAUD)
+
+/* Everything's already setup for fixed-baud PTF
+ * assignment
+ */
+void serial_setbrg( void ){ return; }
+int serial_init( void ) { return(0);}
+
+#else
+
+void serial_setbrg( void )
+{
+	DECLARE_GLOBAL_DATA_PTR;
+	unsigned div;
+
+	div = (CONFIG_SYS_CLK_FREQ/gd->baudrate)-1;
+	uart->divisor = div;
+	return;
+}
+
+int serial_init( void )
+{
+	serial_setbrg();
+	return(0);
+}
+
+#endif /* CFG_NIOS_FIXEDBAUD */
+
+
+void serial_putc( char c )
+{
+	if (c == '\n')
+		serial_putc('\r');
+	while( (uart->status & NIOS_UART_TRDY) == 0 )
+		;
+	uart->txdata = (unsigned char)c;
+}
+
+void serial_puts( const char *s )
+{
+	while( *s != 0 ) {
+		serial_putc( *s++ );
+	}
+}
+
+int serial_tstc( void )
+{
+	return( uart->status & NIOS_UART_RRDY);
+}
+
+int serial_getc( void )
+{
+	while( serial_tstc() == 0 )
+		;
+	return( uart->rxdata & 0x00ff );
+}
-- 
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