* Patch by Bernhard Kuhn, 28 Nov 2003:
add support for Coldfire CPU
add support for Motorola M5272C3 and M5282EVB boards
diff --git a/cpu/coldfire/serial.c b/cpu/coldfire/serial.c
new file mode 100644
index 0000000..a140fe3
--- /dev/null
+++ b/cpu/coldfire/serial.c
@@ -0,0 +1,168 @@
+/*
+ * (C) Copyright 2000-2003
+ * 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 <common.h>
+#include <commproc.h>
+#include <command.h>
+
+#ifdef CONFIG_M5272
+#include <asm/m5272.h>
+#endif
+#ifdef CONFIG_M5282
+#include <asm/m5282.h>
+#endif
+#include <asm/mcfuart.h>
+
+#define DoubleClock(a) ((double)(MCF_CLK) / 32.0 / (double)(a))
+
+void rs_serial_setbaudrate (int port, int baudrate)
+{
+#ifdef CONFIG_M5272
+ volatile unsigned char *uartp;
+ double clock, fraction;
+
+ if (port == 0)
+ uartp = (volatile unsigned char *) (MCF_MBAR + MCFUART_BASE1);
+ else
+ uartp = (volatile unsigned char *) (MCF_MBAR + MCFUART_BASE2);
+
+ clock = DoubleClock (baudrate); /* Set baud above */
+
+ fraction = ((clock - (int) clock) * 16.0) + 0.5;
+
+ uartp[MCFUART_UBG1] = (((int) clock >> 8) & 0xff); /* set msb baud */
+ uartp[MCFUART_UBG2] = ((int) clock & 0xff); /* set lsb baud */
+ uartp[MCFUART_UFPD] = ((int) fraction & 0xf); /* set baud fraction adjust */
+#endif
+}
+
+void rs_serial_init (int port, int baudrate)
+{
+ volatile unsigned char *uartp;
+ double clock, fraction;
+
+ /*
+ * Reset UART, get it into known state...
+ */
+ if (port == 0)
+ uartp = (volatile unsigned char *) (MCF_MBAR + MCFUART_BASE1);
+ else
+ uartp = (volatile unsigned char *) (MCF_MBAR + MCFUART_BASE2);
+
+ uartp[MCFUART_UCR] = MCFUART_UCR_CMDRESETRX; /* reset RX */
+ uartp[MCFUART_UCR] = MCFUART_UCR_CMDRESETTX; /* reset TX */
+ uartp[MCFUART_UCR] = MCFUART_UCR_CMDRESETMRPTR; /* reset MR pointer */
+ uartp[MCFUART_UCR] = MCFUART_UCR_CMDRESETERR; /* reset Error pointer */
+
+ /*
+ * Set port for CONSOLE_BAUD_RATE, 8 data bits, 1 stop bit, no parity.
+ */
+ uartp[MCFUART_UMR] = MCFUART_MR1_PARITYNONE | MCFUART_MR1_CS8;
+ uartp[MCFUART_UMR] = MCFUART_MR2_STOP1;
+
+ rs_serial_setbaudrate (port, baudrate);
+
+ uartp[MCFUART_UCSR] =
+ MCFUART_UCSR_RXCLKTIMER | MCFUART_UCSR_TXCLKTIMER;
+ uartp[MCFUART_UCR] = MCFUART_UCR_RXENABLE | MCFUART_UCR_TXENABLE;
+
+ return;
+}
+
+
+/****************************************************************************/
+
+/*
+ * Output a single character, using UART polled mode.
+ * This is used for console output.
+ */
+
+void rs_put_char (char ch)
+{
+ volatile unsigned char *uartp;
+ int i;
+
+ uartp = (volatile unsigned char *) (MCF_MBAR + MCFUART_BASE1);
+
+ for (i = 0; (i < 0x10000); i++) {
+ if (uartp[MCFUART_USR] & MCFUART_USR_TXREADY)
+ break;
+ }
+ uartp[MCFUART_UTB] = ch;
+ return;
+}
+
+int rs_is_char (void)
+{
+ volatile unsigned char *uartp;
+
+ uartp = (volatile unsigned char *) (MCF_MBAR + MCFUART_BASE1);
+ return ((uartp[MCFUART_USR] & MCFUART_USR_RXREADY) ? 1 : 0);
+}
+
+int rs_get_char (void)
+{
+ volatile unsigned char *uartp;
+
+ uartp = (volatile unsigned char *) (MCF_MBAR + MCFUART_BASE1);
+ return (uartp[MCFUART_URB]);
+}
+
+void serial_setbrg (void)
+{
+ DECLARE_GLOBAL_DATA_PTR;
+ rs_serial_setbaudrate (0, gd->bd->bi_baudrate);
+}
+
+int serial_init (void)
+{
+ DECLARE_GLOBAL_DATA_PTR;
+ rs_serial_init (0, gd->bd->bi_baudrate);
+ return 0;
+}
+
+
+void serial_putc (const char c)
+{
+ if (c == '\n')
+ serial_putc ('\r');
+ rs_put_char (c);
+}
+
+void serial_puts (const char *s)
+{
+ while (*s) {
+ serial_putc (*s++);
+ }
+}
+
+int serial_getc (void)
+{
+ while (!rs_is_char ());
+ return rs_get_char ();
+}
+
+int serial_tstc ()
+{
+ return rs_is_char ();
+}