Initial revision

1 files changed, 158 insertions, 0 deletions

diff --git a/cpu/sa1100/serial.c b/cpu/sa1100/serial.c
new file mode 100644
index 0000000..68bcd1f
--- /dev/null
+++ b/cpu/sa1100/serial.c
@@ -0,0 +1,158 @@
+/*
+ * (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 <SA-1100.h>
+
+void serial_setbrg (void)
+{
+	DECLARE_GLOBAL_DATA_PTR;
+
+	unsigned int reg = 0;
+
+	if (gd->baudrate == 1200)
+		reg = 191;
+	else if (gd->baudrate == 9600)
+		reg = 23;
+	else if (gd->baudrate == 19200)
+		reg = 11;
+	else if (gd->baudrate == 38400)
+		reg = 5;
+	else if (gd->baudrate == 57600)
+		reg = 3;
+	else if (gd->baudrate == 115200)
+		reg = 1;
+	else
+		hang ();
+
+#ifdef CONFIG_SERIAL1
+	/* Wait until port is ready ... */
+	while (Ser1UTSR1 & UTSR1_TBY) {
+	}
+
+	/* init serial serial 1 */
+	Ser1UTCR3 = 0x00;
+	Ser1UTSR0 = 0xff;
+	Ser1UTCR0 = (UTCR0_1StpBit | UTCR0_8BitData);
+	Ser1UTCR1 = 0;
+	Ser1UTCR2 = (u32) reg;
+	Ser1UTCR3 = (UTCR3_RXE | UTCR3_TXE);
+#elif CONFIG_SERIAL3
+	/* Wait until port is ready ... */
+	while (Ser3UTSR1 & UTSR1_TBY) {
+	}
+
+	/* init serial serial 3 */
+	Ser3UTCR3 = 0x00;
+	Ser3UTSR0 = 0xff;
+	Ser3UTCR0 = (UTCR0_1StpBit | UTCR0_8BitData);
+	Ser3UTCR1 = 0;
+	Ser3UTCR2 = (u32) reg;
+	Ser3UTCR3 = (UTCR3_RXE | UTCR3_TXE);
+#else
+#error "Bad: you didn't configured serial ..."
+#endif
+}
+
+
+/*
+ * 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)
+{
+#ifdef CONFIG_SERIAL1
+	/* wait for room in the tx FIFO on SERIAL1 */
+	while ((Ser1UTSR0 & UTSR0_TFS) == 0);
+
+	Ser1UTDR = c;
+#elif CONFIG_SERIAL3
+	/* wait for room in the tx FIFO on SERIAL3 */
+	while ((Ser3UTSR0 & UTSR0_TFS) == 0);
+
+	Ser3UTDR = c;
+#endif
+
+	/* 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)
+{
+#ifdef CONFIG_SERIAL1
+	return Ser1UTSR1 & UTSR1_RNE;
+#elif CONFIG_SERIAL3
+	return Ser3UTSR1 & UTSR1_RNE;
+#endif
+}
+
+/*
+ * 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)
+{
+#ifdef CONFIG_SERIAL1
+	while (!(Ser1UTSR1 & UTSR1_RNE));
+
+	return (char) Ser1UTDR & 0xff;
+#elif CONFIG_SERIAL3
+	while (!(Ser3UTSR1 & UTSR1_RNE));
+
+	return (char) Ser3UTDR & 0xff;
+#endif
+}
+
+void
+serial_puts (const char *s)
+{
+	while (*s) {
+		serial_putc (*s++);
+	}
+}