1 files changed, 123 insertions, 0 deletions
diff --git a/c/src/lib/libbsp/mips/jmr3904/console/console-io.c b/c/src/lib/libbsp/mips/jmr3904/console/console-io.c
new file mode 100644
index 0000000000..5a301fe4f1
--- /dev/null
+++ b/c/src/lib/libbsp/mips/jmr3904/console/console-io.c
@@ -0,0 +1,123 @@
+/*
+ *  This file contains the hardware specific portions of the TTY driver
+ *  for the serial ports on the jmr3904.
+ *
+ *  Logic based on the jmr3904-io.c file in newlib 1.8.2
+ *
+ *  COPYRIGHT (c) 1989-2000.
+ *  On-Line Applications Research Corporation (OAR).
+ *
+ *  The license and distribution terms for this file may be
+ *  found in the file LICENSE in this distribution or at
+ *  http://www.OARcorp.com/rtems/license.html.
+ *
+ *  $Id$
+ */
+
+#include <bsp.h>
+#include <rtems/libio.h>
+#include <stdlib.h>
+#include <assert.h>
+
+/* external prototypes for monitor interface routines */
+
+void outbyte( char );
+char inbyte( void );
+
+#define READ_UINT8( _register_, _value_ ) \
+        ((_value_) = *((volatile unsigned char *)(_register_)))
+
+#define WRITE_UINT8( _register_, _value_ ) \
+        (*((volatile unsigned char *)(_register_)) = (_value_))
+
+#define READ_UINT16( _register_, _value_ ) \
+     ((_value_) = *((volatile unsigned short *)(_register_)))
+
+#define WRITE_UINT16( _register_, _value_ ) \
+     (*((volatile unsigned short *)(_register_)) = (_value_))
+
+
+ /* - Board specific addresses for serial chip */
+#define DIAG_BASE       0xfffff300
+#define DIAG_SLCR       (DIAG_BASE+0x00)
+#define DIAG_SLSR       (DIAG_BASE+0x04)
+#define DIAG_SLDICR     (DIAG_BASE+0x08)
+#define DIAG_SLDISR     (DIAG_BASE+0x0C)
+#define DIAG_SFCR       (DIAG_BASE+0x10)
+#define DIAG_SBRG       (DIAG_BASE+0x14)
+#define DIAG_TFIFO      (DIAG_BASE+0x20)
+#define DIAG_RFIFO      (DIAG_BASE+0x30)
+
+#define BRG_T0          0x0000
+#define BRG_T2          0x0100
+#define BRG_T4          0x0200
+#define BRG_T5          0x0300
+
+/*
+ *  Eventually console-polled.c should hook to this better.
+ */
+
+static char initialized = 0;
+
+void board_serial_init (void)
+{
+  initialized = 1;
+  WRITE_UINT16 (DIAG_SLCR, 0x0020);
+  WRITE_UINT16 (DIAG_SLDICR, 0x0000);
+  WRITE_UINT16 (DIAG_SFCR, 0x0000);
+  WRITE_UINT16 (DIAG_SBRG, BRG_T2 | 5);
+}
+
+/*
+ *  console_outbyte_polled
+ *
+ *  This routine transmits a character using polling.
+ */
+
+void console_outbyte_polled(
+  int  port,
+  char ch
+)
+{
+  unsigned short disr;
+
+  if ( !initialized )
+    board_serial_init();
+
+  for (;;)
+    {
+      READ_UINT16 (DIAG_SLDISR, disr);
+      if (disr & 0x0002)
+        break;
+    }
+  disr = disr & ~0x0002;
+  WRITE_UINT8 (DIAG_TFIFO, (unsigned char) ch);
+  WRITE_UINT16 (DIAG_SLDISR, disr);
+}
+
+/*
+ *  console_inbyte_nonblocking 
+ *
+ *  This routine polls for a character.
+ */
+
+int console_inbyte_nonblocking(
+  int port
+)
+{
+  unsigned char c;
+  unsigned short disr;
+
+  if ( !initialized )
+    board_serial_init();
+
+  READ_UINT16 (DIAG_SLDISR, disr);
+  if (disr & 0x0001) {
+    disr = disr & ~0x0001;
+    READ_UINT8 (DIAG_RFIFO, c);
+    WRITE_UINT16 (DIAG_SLDISR, disr);
+    return (char) c;
+  }
+  return -1;
+}
+