Patch by Scott McNutt, 25 Apr 2004:

[karo-tx-uboot.git] / cpu / nios / serial.c

diff --git a/cpu/nios/serial.c b/cpu/nios/serial.c
index 34257a2fe9040ae38c952a5a90354b4fc5a3be7e..4bdda25007aa92f20e506e2f97b709603ad0eb6c 100644 (file)
--- a/cpu/nios/serial.c
+++ b/cpu/nios/serial.c
@@ -26,6 +26,48 @@
 #include <watchdog.h>
 #include <nios-io.h>
 
+/*------------------------------------------------------------------
+ * JTAG acts as the serial port
+ *-----------------------------------------------------------------*/
+#if defined(CONFIG_CONSOLE_JTAG)
+
+static nios_jtag_t *jtag = (nios_jtag_t *)CFG_NIOS_CONSOLE;
+
+void serial_setbrg( void ){ return; }
+int serial_init( void ) { return(0);}
+
+void serial_putc (char c)
+{
+       while ((jtag->txcntl & NIOS_JTAG_TRDY) != 0)
+               WATCHDOG_RESET ();
+       jtag->txcntl = NIOS_JTAG_TRDY | (unsigned char)c;
+}
+
+void serial_puts (const char *s)
+{
+       while (*s != 0)
+               serial_putc (*s++);
+}
+
+int serial_tstc (void)
+{
+       return (jtag->rxcntl & NIOS_JTAG_RRDY);
+}
+
+int serial_getc (void)
+{
+       int c;
+       while (serial_tstc() == 0)
+               WATCHDOG_RESET ();
+       c = jtag->rxcntl & 0x0ff;
+       jtag->rxcntl = 0;
+       return (c);
+}
+
+/*------------------------------------------------------------------
+ * UART the serial port
+ *-----------------------------------------------------------------*/
+#else
 
 static nios_uart_t *uart = (nios_uart_t *)CFG_NIOS_CONSOLE;
 
@@ -34,12 +76,12 @@ static nios_uart_t *uart = (nios_uart_t *)CFG_NIOS_CONSOLE;
 /* Everything's already setup for fixed-baud PTF
  * assignment
  */
-void serial_setbrg( void ){ return; }
-int serial_init( void ) { return(0);}
+void serial_setbrg (void){ return; }
+int serial_init (void) { return (0);}
 
 #else
 
-void serial_setbrg( void )
+void serial_setbrg (void)
 {
        DECLARE_GLOBAL_DATA_PTR;
        unsigned div;
@@ -49,39 +91,44 @@ void serial_setbrg( void )
        return;
 }
 
-int serial_init( void )
+int serial_init (void)
 {
-       serial_setbrg();
-       return(0);
+       serial_setbrg ();
+       return (0);
 }
 
 #endif /* CFG_NIOS_FIXEDBAUD */
 
 
-void serial_putc( char c )
+/*-----------------------------------------------------------------------
+ * UART CONSOLE
+ *---------------------------------------------------------------------*/
+void serial_putc (char c)
 {
        if (c == '\n')
-               serial_putc('\r');
-       while( (uart->status & NIOS_UART_TRDY) == 0 )
+               serial_putc ('\r');
+       while ((uart->status & NIOS_UART_TRDY) == 0)
                WATCHDOG_RESET ();
        uart->txdata = (unsigned char)c;
 }
 
-void serial_puts( const char *s )
+void serial_puts (const char *s)
 {
-       while( *s != 0 ) {
-               serial_putc( *s++ );
+       while (*s != 0) {
+               serial_putc (*s++);
        }
 }
 
-int serial_tstc( void )
+int serial_tstc (void)
 {
-       return( uart->status & NIOS_UART_RRDY);
+       return (uart->status & NIOS_UART_RRDY);
 }
 
-int serial_getc( void )
+int serial_getc (void)
 {
-       while( serial_tstc() == 0 )
+       while (serial_tstc () == 0)
                WATCHDOG_RESET ();
        return( uart->rxdata & 0x00ff );
 }
+
+#endif /* CONFIG_JTAG_CONSOLE */