Initial revision
diff --git a/cpu/arm920t/serial.c b/cpu/arm920t/serial.c
new file mode 100644
index 0000000..c32e73b
--- /dev/null
+++ b/cpu/arm920t/serial.c
@@ -0,0 +1,200 @@
+/*
+ * (C) Copyright 2002
+ * Gary Jennejohn, DENX Software Engineering, <gj@denx.de>
+ *
+ * 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>
+#if defined(CONFIG_S3C2400) || defined(CONFIG_TRAB)
+#include <s3c2400.h>
+#elif defined(CONFIG_S3C2410)
+#include <s3c2410.h>
+#endif
+
+
+void serial_setbrg (void)
+{
+ DECLARE_GLOBAL_DATA_PTR;
+
+ int i;
+ unsigned int reg = 0;
+
+ /* value is calculated so : (int)(PCLK/16./baudrate) -1 */
+ reg = get_PCLK() / (16 * gd->baudrate) - 1;
+
+#ifdef CONFIG_SERIAL1
+ /* FIFO enable, Tx/Rx FIFO clear */
+ rUFCON0 = 0x07;
+ rUMCON0 = 0x0;
+ /* Normal,No parity,1 stop,8 bit */
+ rULCON0 = 0x3;
+ /*
+ * tx=level,rx=edge,disable timeout int.,enable rx error int.,
+ * normal,interrupt or polling
+ */
+ rUCON0 = 0x245;
+ rUBRDIV0 = reg;
+
+#ifdef CONFIG_HWFLOW
+ rUMCON0 = 0x1; /* RTS up */
+#endif
+ for (i = 0; i < 100; i++);
+#elif CONFIG_SERIAL2
+# if defined(CONFIG_TRAB)
+# #error "TRAB supports only CONFIG_SERIAL1"
+# endif
+ /* FIFO enable, Tx/Rx FIFO clear */
+ rUFCON1 = 0x06;
+ rUMCON1 = 0x0;
+ /* Normal,No parity,1 stop,8 bit */
+ rULCON1 = 0x3;
+ /*
+ * tx=level,rx=edge,disable timeout int.,enable rx error int.,
+ * normal,interrupt or polling
+ */
+ rUCON1 = 0x245;
+ rUBRDIV1 = reg;
+
+#ifdef CONFIG_HWFLOW
+ rUMCON1 = 0x1; /* RTS up */
+#endif
+ for (i = 0; i < 100; i++);
+#else
+#error "Bad: you didn't configure 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);
+}
+
+/*
+ * 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 (!(rUTRSTAT0 & 0x1));
+
+ return rURXH0 & 0xff;
+#elif CONFIG_SERIAL2
+ while (!(rUTRSTAT1 & 0x1));
+
+ return rURXH1 & 0xff;
+#endif
+}
+
+#ifdef CONFIG_HWFLOW
+static int hwflow = 0; /* turned off by default */
+int hwflow_onoff(int on)
+{
+ switch(on) {
+ case 0:
+ default:
+ break; /* return current */
+ case 1:
+ hwflow = 1; /* turn on */
+ break;
+ case -1:
+ hwflow = 0; /* turn off */
+ break;
+ }
+ return hwflow;
+}
+#endif
+
+#ifdef CONFIG_MODEM_SUPPORT
+static int be_quiet = 0;
+void disable_putc(void)
+{
+ be_quiet = 1;
+}
+
+void enable_putc(void)
+{
+ be_quiet = 0;
+}
+#endif
+
+
+/*
+ * Output a single byte to the serial port.
+ */
+void serial_putc (const char c)
+{
+#ifdef CONFIG_MODEM_SUPPORT
+ if (be_quiet)
+ return;
+#endif
+
+#ifdef CONFIG_SERIAL1
+ /* wait for room in the tx FIFO on SERIAL1 */
+ while (!(rUTRSTAT0 & 0x2));
+
+#ifdef CONFIG_HWFLOW
+ /* Wait for CTS up */
+ while(hwflow && !(rUMSTAT0 & 0x1))
+ ;
+#endif
+
+ rUTXH0 = c;
+#elif CONFIG_SERIAL2
+ /* wait for room in the tx FIFO on SERIAL2 */
+ while (!(rUTRSTAT1 & 0x2));
+
+#ifdef CONFIG_HWFLOW
+ /* Wait for CTS up */
+ while(hwflow && !(rUMSTAT1 & 0x1))
+ ;
+#endif
+ rUTXH1 = c;
+#endif
+
+ /* If \n, also do \r */
+ if (c == '\n')
+ serial_putc ('\r');
+}
+
+/*
+ * Test whether a character is in the RX buffer
+ */
+int serial_tstc (void)
+{
+#ifdef CONFIG_SERIAL1
+ return rUTRSTAT0 & 0x1;
+#elif CONFIG_SERIAL2
+ return rUTRSTAT1 & 0x1;
+#endif
+}
+
+void
+serial_puts (const char *s)
+{
+ while (*s) {
+ serial_putc (*s++);
+ }
+}