1 files changed, 116 insertions, 0 deletions
diff --git a/cpu/arm920t/ks8695/serial.c b/cpu/arm920t/ks8695/serial.c
new file mode 100644
index 0000000..0dd91e7
--- /dev/null
+++ b/cpu/arm920t/ks8695/serial.c
@@ -0,0 +1,116 @@
+/*
+ * serial.c -- KS8695 serial driver
+ *
+ * (C) Copyright 2004, Greg Ungerer <greg.ungerer@opengear.com>
+ *
+ * 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/platform.h>
+
+#ifndef CONFIG_SERIAL1
+#error "Bad: you didn't configure serial ..."
+#endif
+
+/*
+ *	Define the UART hardware register access structure.
+ */
+struct ks8695uart {
+	unsigned int	RX;		/* 0x00	- Receive data (r) */
+	unsigned int	TX;		/* 0x04	- Transmit data (w) */
+	unsigned int	FCR;		/* 0x08	- Fifo Control (r/w) */
+	unsigned int	LCR;		/* 0x0c	- Line Control (r/w) */
+	unsigned int	MCR;		/* 0x10	- Modem Control (r/w) */
+	unsigned int	LSR;		/* 0x14	- Line Status (r/w) */
+	unsigned int	MSR;		/* 0x18	- Modem Status (r/w) */
+	unsigned int	BD;		/* 0x1c	- Baud Rate (r/w) */
+	unsigned int	SR;		/* 0x20	- Status (r/w) */
+};
+
+#define	KS8695_UART_ADDR	((void *) (KS8695_IO_BASE + KS8695_UART_RX_BUFFER))
+#define	KS8695_UART_CLK		25000000
+
+
+/*
+ * Under some circumstances we want to be "quiet" and not issue any
+ * serial output - though we want u-boot to otherwise work and behave
+ * the same. By default be noisy.
+ */
+int serial_console = 1;
+
+
+void serial_setbrg(void)
+{
+	DECLARE_GLOBAL_DATA_PTR;
+	volatile struct ks8695uart *uartp = KS8695_UART_ADDR;
+
+	/* Set to global baud rate and 8 data bits, no parity, 1 stop bit*/
+	uartp->BD = KS8695_UART_CLK / gd->baudrate;
+	uartp->LCR = KS8695_UART_LINEC_WLEN8;
+}
+
+int serial_init(void)
+{
+	serial_console = 1;
+	serial_setbrg();
+	return 0;
+}
+
+void serial_raw_putc(const char c)
+{
+	volatile struct ks8695uart *uartp = KS8695_UART_ADDR;
+	int i;
+
+	for (i = 0; (i < 0x100000); i++) {
+		if (uartp->LSR & KS8695_UART_LINES_TXFE)
+			break;
+	}
+
+	uartp->TX = c;
+}
+
+void serial_putc(const char c)
+{
+	if (serial_console) {
+		serial_raw_putc(c);
+		if (c == '\n')
+			serial_raw_putc('\r');
+	}
+}
+
+int serial_tstc(void)
+{
+	volatile struct ks8695uart *uartp = KS8695_UART_ADDR;
+	if (serial_console)
+		return ((uartp->LSR & KS8695_UART_LINES_RXFE) ? 1 : 0);
+	return 0;
+}
+
+void serial_puts(const char *s)
+{
+	char c;
+	while ((c = *s++) != 0)
+		serial_putc(c);
+}
+
+int serial_getc(void)
+{
+	volatile struct ks8695uart *uartp = KS8695_UART_ADDR;
+
+	while ((uartp->LSR & KS8695_UART_LINES_RXFE) == 0)
+		;
+	return (uartp->RX);
+}