xes: Consolidate checkboard()

Create a common checkboard() function to support all X-ES's Freescale
boards.

Also, add a get_board_derivative() function which reads hardware
strapping resistors to determine what model a board is.  This allows one
U-Boot image to support multiple boards.

Signed-off-by: John Schmoller <jschmoller@xes-inc.com>
Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

1 files changed, 47 insertions, 0 deletions

diff --git a/board/xes/common/fsl_8xxx_misc.c b/board/xes/common/fsl_8xxx_misc.c
new file mode 100644
index 0000000000..e37a3c1123
--- /dev/null
+++ b/board/xes/common/fsl_8xxx_misc.c
@@ -0,0 +1,47 @@
+/*
+ * Copyright 2008 Extreme Engineering Solutions, Inc.
+ *
+ * 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
+ */
+
+#include <common.h>
+#include <asm/mmu.h>
+
+/*
+ * Return a board's derivative model number.  For example:
+ * return 2 for the XPedite5372 and return 1 for the XPedite5201.
+ */
+uint get_board_derivative(void)
+{
+#if defined(CONFIG_MPC85xx)
+       volatile ccsr_gur_t *gur = (void *)CONFIG_SYS_MPC85xx_GUTS_ADDR;
+#elif defined(CONFIG_MPC86xx)
+       volatile immap_t *immap = (immap_t *)CONFIG_SYS_CCSRBAR;
+       volatile ccsr_gur_t *gur = &immap->im_gur;
+#endif
+
+       /*
+        * The top 4 lines of the local bus address are pulled low/high and
+        * can be read to determine the least significant digit of a board's
+        * model number.
+        */
+       return gur->gpporcr >> 28;
+}
+
+