1 files changed, 146 insertions, 0 deletions
diff --git a/cpu/mc9328/serial.c b/cpu/mc9328/serial.c
new file mode 100644
index 000000000..45b6f8afd
--- /dev/null
+++ b/cpu/mc9328/serial.c
@@ -0,0 +1,146 @@
+/*
+ * cpu/mc9328/serial.c 
+ * 
+ * (c) Copyright 2004
+ * Techware Information Technology, Inc.
+ * http://www.techware.com.tw/
+ *
+ * Ming-Len Wu <minglen_wu@techware.com.tw>
+ *
+ * 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 <mc9328.h>
+
+#if defined(CONFIG_UART1) 
+/* GPIO PORT B 		*/
+
+#define reg_GIUS	MX1_GIUS_C
+#define reg_GPR		MX1_GPR_B
+#define GPIO_MASK	0xFFFFE1FF
+#define UART_BASE	0x00206000
+
+
+#elif defined (CONFIG_UART2)
+/* GPIO PORT C  	*/
+
+#define reg_GIUS	MX1_GIUS_C
+#define reg_GPR		MX1_GPR_C
+#define GPIO_MASK 	0x0FFFFFFF
+#define UART_BASE	0x207000
+
+#endif 
+
+#define reg_URXD	(*((volatile u32 *)(UART_BASE+0x00)))
+#define reg_UTXD	(*((volatile u32 *)(UART_BASE+0x40)))
+#define reg_UCR1	(*((volatile u32 *)(UART_BASE+0x80)))
+#define reg_UCR2	(*((volatile u32 *)(UART_BASE+0x84)))
+#define reg_UCR3	(*((volatile u32 *)(UART_BASE+0x88)))
+#define reg_UCR4	(*((volatile u32 *)(UART_BASE+0x8C)))
+#define reg_UFCR	(*((volatile u32 *)(UART_BASE+0x90)))
+#define reg_USR1	(*((volatile u32 *)(UART_BASE+0x94)))
+#define reg_USR2	(*((volatile u32 *)(UART_BASE+0x98)))
+#define reg_UESC	(*((volatile u32 *)(UART_BASE+0x9C)))
+#define reg_UTIM	(*((volatile u32 *)(UART_BASE+0xA0)))
+#define reg_UBIR	(*((volatile u32 *)(UART_BASE+0xA4)))
+#define reg_UBMR	(*((volatile u32 *)(UART_BASE+0xA8)))
+#define reg_UBRC	(*((volatile u32 *)(UART_BASE+0xAC)))
+
+#define TXFE_MASK	0x4000  	/* Tx buffer empty	*/
+#define RDR_MASK	0x0001		/* receive data ready	*/
+
+
+void serial_setbrg (void) {
+
+/* config I/O pins for UART 	*/
+
+	reg_GIUS 	&= GPIO_MASK;
+	reg_GPR		&= GPIO_MASK;
+
+/* config UART			*/
+
+	reg_UCR1 	= 5;
+	reg_UCR2 	= 0x4027;
+	reg_UCR4 	= 1;
+	reg_UFCR 	= 0xA81;
+
+	reg_UBIR 	= 0xF;
+	reg_UBMR 	= 0x8A;
+	reg_UBRC 	= 8;
+}
+
+
+
+/*
+ * 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) {
+
+	while (!(reg_USR2 & RDR_MASK)) ; 	/* wait until RDR bit set 		*/
+
+	return (u8)reg_URXD;
+}
+
+
+/*
+ * Output a single byte to the serial port.
+ */
+void serial_putc (const char c) {
+
+	while (!(reg_USR2 & TXFE_MASK));	/* wait until TXFE bit set		*/
+
+	reg_UTXD = (u16) c;
+
+	if (c == '\n')	{			/* carriage return ? append line-feed	*/
+		while (!(reg_USR2 & TXFE_MASK));	/* wait until TXFE bit set	*/
+		reg_UTXD = '\r';
+	}
+
+}
+
+
+/*
+ * Test whether a character is in the RX buffer
+ */
+int serial_tstc (void) {
+	return reg_USR2 & RDR_MASK;
+}
+
+
+void serial_puts (const char *s) {
+	while (*s) {
+		serial_putc (*s++);
+	}
+}
+