Initial revision

1 files changed, 132 insertions, 0 deletions

diff --git a/board/pcippc2/fpga_serial.c b/board/pcippc2/fpga_serial.c
new file mode 100644
index 0000000..579bfc7
--- /dev/null
+++ b/board/pcippc2/fpga_serial.c
@@ -0,0 +1,132 @@
+/*
+ * (C) Copyright 2002
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * 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 <config.h>
+#include <common.h>
+#include <asm/io.h>
+
+#include "fpga_serial.h"
+#include "hardware.h"
+#include "pcippc2.h"
+
+  /* 8 data, 1 stop, no parity
+   */
+#define LCRVAL		0x03
+  /* RTS/DTR
+   */
+#define MCRVAL		0x03
+  /* Clear & enable FIFOs
+   */
+#define FCRVAL		0x07
+
+static void fpga_serial_wait (void);
+static void fpga_serial_print (char c);
+
+void fpga_serial_init (int baudrate)
+{
+	int clock_divisor = 115200 / baudrate;
+
+	out8 (FPGA (INT, SERIAL_CONFIG), 0x24);
+	iobarrier_rw ();
+
+	fpga_serial_wait ();
+
+	out8 (UART (IER), 0);
+	out8 (UART (LCR), LCRVAL | 0x80);
+	iobarrier_rw ();
+	out8 (UART (DLL), clock_divisor & 0xff);
+	out8 (UART (DLM), clock_divisor >> 8);
+	iobarrier_rw ();
+	out8 (UART (LCR), LCRVAL);
+	iobarrier_rw ();
+	out8 (UART (MCR), MCRVAL);
+	out8 (UART (FCR), FCRVAL);
+	iobarrier_rw ();
+}
+
+void fpga_serial_putc (char c)
+{
+	if (c) {
+		fpga_serial_print (c);
+	}
+}
+
+void fpga_serial_puts (const char *s)
+{
+	while (*s) {
+		fpga_serial_print (*s++);
+	}
+}
+
+int fpga_serial_getc (void)
+{
+	while ((in8 (UART (LSR)) & 0x01) == 0);
+
+	return in8 (UART (RBR));
+}
+
+int fpga_serial_tstc (void)
+{
+	return (in8 (UART (LSR)) & 0x01) != 0;
+}
+
+void fpga_serial_setbrg (void)
+{
+	DECLARE_GLOBAL_DATA_PTR;
+
+	int clock_divisor = 115200 / gd->baudrate;
+
+	fpga_serial_wait ();
+
+	out8 (UART (LCR), LCRVAL | 0x80);
+	iobarrier_rw ();
+	out8 (UART (DLL), clock_divisor & 0xff);
+	out8 (UART (DLM), clock_divisor >> 8);
+	iobarrier_rw ();
+	out8 (UART (LCR), LCRVAL);
+	iobarrier_rw ();
+}
+
+static void fpga_serial_wait (void)
+{
+	while ((in8 (UART (LSR)) & 0x40) == 0);
+}
+
+static void fpga_serial_print (char c)
+{
+	if (c == '\n') {
+		while ((in8 (UART (LSR)) & 0x20) == 0);
+
+		out8 (UART (THR), '\r');
+		iobarrier_rw ();
+	}
+
+	while ((in8 (UART (LSR)) & 0x20) == 0);
+
+	out8 (UART (THR), c);
+	iobarrier_rw ();
+
+	if (c == '\n') {
+		fpga_serial_wait ();
+	}
+}