1 files changed, 76 insertions, 0 deletions
diff --git a/drivers/serial/serial_xuartlite.c b/drivers/serial/serial_xuartlite.c
new file mode 100644
index 0000000..d678ab6
--- /dev/null
+++ b/drivers/serial/serial_xuartlite.c
@@ -0,0 +1,76 @@
+/*
+ * (C) Copyright 2004 Atmark Techno, Inc.
+ *
+ * Yasushi SHOJI <yashi@atmark-techno.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 <config.h>
+
+#ifdef	CONFIG_XILINX_UARTLITE
+
+#include <asm/serial_xuartlite.h>
+
+/* FIXME: we should convert these to in32 and out32 */
+#define IO_WORD(offset)	     (*(volatile unsigned long *)(offset))
+#define IO_SERIAL(offset)    IO_WORD(CONFIG_SERIAL_BASE + (offset))
+
+#define IO_SERIAL_RX_FIFO   IO_SERIAL(XUL_RX_FIFO_OFFSET)
+#define IO_SERIAL_TX_FIFO   IO_SERIAL(XUL_TX_FIFO_OFFSET)
+#define IO_SERIAL_STATUS    IO_SERIAL(XUL_STATUS_REG_OFFSET)
+#define IO_SERIAL_CONTROL   IO_SERIAL(XUL_CONTROL_REG_OFFSET)
+
+int serial_init(void)
+{
+	/* FIXME: Nothing for now. We should initialize fifo, etc */
+	return 0;
+}
+
+void serial_setbrg(void)
+{
+	/* FIXME: what's this for? */
+}
+
+void serial_putc(const char c)
+{
+	if (c == '\n') serial_putc('\r');
+	while (IO_SERIAL_STATUS & XUL_SR_TX_FIFO_FULL);
+	IO_SERIAL_TX_FIFO = (unsigned char) (c & 0xff);
+}
+
+void serial_puts(const char * s)
+{
+	while (*s) {
+		serial_putc(*s++);
+	}
+}
+
+int serial_getc(void)
+{
+	while (!(IO_SERIAL_STATUS & XUL_SR_RX_FIFO_VALID_DATA));
+	return IO_SERIAL_RX_FIFO & 0xff;
+}
+
+int serial_tstc(void)
+{
+	return (IO_SERIAL_STATUS & XUL_SR_RX_FIFO_VALID_DATA);
+}
+
+#endif	/* CONFIG_MICROBLZE */