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-rw-r--r--board/alaska/extserial.c110
1 files changed, 110 insertions, 0 deletions
diff --git a/board/alaska/extserial.c b/board/alaska/extserial.c
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+/*
+ * (C) Copyright 2004, Freescale, Inc
+ * TsiChung Liew, Tsi-Chung.Liew@freescale.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
+ *
+ */
+
+/*
+ * Minimal serial functions needed to use one of the PSC ports
+ * as serial console interface.
+ */
+
+#include <common.h>
+#include <mpc8220.h>
+
+#if defined (CONFIG_EXTUART_CONSOLE)
+# include <ns16550.h>
+
+# define PADSERIAL_BAUD_115200 0x40
+# define PADSERIAL_BAUD_57600 0x20
+# define PADSERIAL_BAUD_9600 0
+# define PADCARD_FREQ 18432000
+
+const NS16550_t com_port = (NS16550_t) CFG_NS16550_COM1;
+
+int ext_serial_init (void)
+{
+ DECLARE_GLOBAL_DATA_PTR;
+ volatile u8 *dipswitch = (volatile u8 *) (CFG_CPLD_BASE + 0x1002);
+ int baud_divisor;
+
+ /* Find out the baud rate speed on debug card dip switches */
+ if (*dipswitch & PADSERIAL_BAUD_115200)
+ gd->baudrate = 115200;
+ else if (*dipswitch & PADSERIAL_BAUD_57600)
+ gd->baudrate = 57600;
+ else
+ gd->baudrate = 9600;
+
+ /* Debug card frequency */
+ baud_divisor = PADCARD_FREQ / (16 * gd->baudrate);
+
+ NS16550_init (com_port, baud_divisor);
+
+ return (0);
+}
+
+void ext_serial_putc (const char c)
+{
+ if (c == '\n')
+ NS16550_putc (com_port, '\r');
+
+ NS16550_putc (com_port, c);
+}
+
+void ext_serial_puts (const char *s)
+{
+ while (*s) {
+ serial_putc (*s++);
+ }
+}
+
+int ext_serial_getc (void)
+{
+ return NS16550_getc (com_port);
+}
+
+int ext_serial_tstc (void)
+{
+ return NS16550_tstc (com_port);
+}
+
+void ext_serial_setbrg (void)
+{
+ DECLARE_GLOBAL_DATA_PTR;
+
+ volatile u8 *dipswitch = (volatile u8 *) (CFG_CPLD_BASE + 0x1002);
+ int baud_divisor;
+
+ /* Find out the baud rate speed on debug card dip switches */
+ if (*dipswitch & PADSERIAL_BAUD_115200)
+ gd->baudrate = 115200;
+ else if (*dipswitch & PADSERIAL_BAUD_57600)
+ gd->baudrate = 57600;
+ else
+ gd->baudrate = 9600;
+
+ /* Debug card frequency */
+ baud_divisor = PADCARD_FREQ / (16 * gd->baudrate);
+
+ NS16550_reinit (com_port, baud_divisor);
+}
+#endif /* CONFIG_EXTUART_CONSOLE */