arm: tegra2: separate out SPI/UART switch code into its own file

BUG=chromium-os:11623
TEST=build and boot U-Boot

Change-Id: I1ac2ce58630b483a6d7a2388744e3bc983555bd1
Reviewed-on: http://gerrit.chromium.org/gerrit/617
Tested-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Anton Staaf <robotboy@chromium.org>

1 files changed, 46 insertions, 0 deletions

diff --git a/include/uart-spi-fix.h b/include/uart-spi-fix.h
new file mode 100644
index 00000000000..ee352acd232
--- /dev/null
+++ b/include/uart-spi-fix.h
@@ -0,0 +1,46 @@
+/*
+ * Copyright (c) 2011 The Chromium OS Authors.
+ * 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
+ */
+
+
+#if defined(CONFIG_SPI_UART_SWITCH)
+
+#ifndef __ASSEMBLY__
+#include <ns16550.h>
+/*
+ * Signal that we are about to use the UART. This unfortunate hack is
+ * required by Seaboard, which cannot use its console and SPI at the same
+ * time! If the board file provides this, the board config will declare it.
+ * Let this be a lesson for others.
+ */
+void uart_enable(NS16550_t regs);
+
+/*
+ * Signal that we are about the use the SPI bus.
+ */
+void spi_enable(void);
+#endif
+
+#else /* not CONFIG_SPI_UART_SWITCH */
+
+static inline void uart_enable(NS16550_t regs) {}
+static inline void spi_enable(void) {}
+
+#endif