1 files changed, 68 insertions, 0 deletions

diff --git a/arch/mips/alchemy/common/puts.c b/arch/mips/alchemy/common/puts.c
new file mode 100644
index 000000000000..55bbe24d45b6
--- /dev/null
+++ b/arch/mips/alchemy/common/puts.c
@@ -0,0 +1,68 @@
+/*
+ *
+ * BRIEF MODULE DESCRIPTION
+ *      Low level UART routines to directly access Alchemy UART.
+ *
+ * Copyright 2001, 2008 MontaVista Software Inc.
+ * Author: MontaVista Software, Inc. <source@mvista.com>
+ *
+ *  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  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
+ *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
+ *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
+ *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
+ *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
+ *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ *  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.,
+ *  675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <asm/mach-au1x00/au1000.h>
+
+#define SERIAL_BASE   UART_BASE
+#define SER_CMD       0x7
+#define SER_DATA      0x1
+#define TX_BUSY       0x20
+
+#define TIMEOUT       0xffffff
+#define SLOW_DOWN
+
+static volatile unsigned long * const com1 = (unsigned long *)SERIAL_BASE;
+
+#ifdef SLOW_DOWN
+static inline void slow_down(void)
+{
+        int k;
+
+        for (k = 0; k < 10000; k++);
+}
+#else
+#define slow_down()
+#endif
+
+void
+prom_putchar(const unsigned char c)
+{
+        unsigned char ch;
+        int i = 0;
+
+        do {
+                ch = com1[SER_CMD];
+                slow_down();
+                i++;
+                if (i > TIMEOUT)
+                        break;
+        } while (0 == (ch & TX_BUSY));
+
+        com1[SER_DATA] = c;
+}