Add support for AMCC Sequoia PPC440EPx eval board

- Add support for PPC440EPx & PPC440GRx
- Add support for PPC440EP(x)/GR(x) NAND controller
  in cpu/ppc4xx directory
- Add NAND boot functionality for Sequoia board,
  please see doc/README.nand-boot-ppc440 for details
- This Sequoia NAND image doesn't support environment
  in NAND for now. This will be added in a short while.
Patch by Stefan Roese, 07 Sep 2006

1 files changed, 83 insertions, 0 deletions

diff --git a/board/amcc/sequoia/sdram.c b/board/amcc/sequoia/sdram.c
new file mode 100644
index 0000000..a62648b
--- /dev/null
+++ b/board/amcc/sequoia/sdram.c
@@ -0,0 +1,83 @@
+/*
+ * (C) Copyright 2006
+ * Stefan Roese, DENX Software Engineering, sr@denx.de.
+ *
+ * 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/processor.h>
+#include <ppc440.h>
+
+/*************************************************************************
+ *
+ * initdram -- 440EPx's DDR controller is a DENALI Core
+ *
+ ************************************************************************/
+long int initdram (int board_type)
+{
+#if !defined(CONFIG_NAND_U_BOOT) || defined(CONFIG_NAND_SPL)
+	volatile ulong val;
+
+	mtsdram(DDR0_02, 0x00000000);
+
+	/*
+	 * Soft-reset SDRAM controller
+	 */
+	mtsdr(sdr_srst, SDR0_SRST0_DMC);
+	mtsdr(sdr_srst, 0x00000000);
+
+	mtsdram(DDR0_00, 0x0000190A);
+	mtsdram(DDR0_01, 0x01000000);
+	mtsdram(DDR0_03, 0x02030602);
+	mtsdram(DDR0_04, 0x13030300);
+	mtsdram(DDR0_05, 0x0202050E);
+	mtsdram(DDR0_06, 0x0104C823);
+	mtsdram(DDR0_07, 0x000D0100);
+	mtsdram(DDR0_08, 0x02360001);
+	mtsdram(DDR0_09, 0x00011D5F);
+	mtsdram(DDR0_10, 0x00000300);
+	mtsdram(DDR0_11, 0x0027C800);
+	mtsdram(DDR0_12, 0x00000003);
+	mtsdram(DDR0_14, 0x00000000);
+	mtsdram(DDR0_17, 0x19000000);
+	mtsdram(DDR0_18, 0x19191919);
+	mtsdram(DDR0_19, 0x19191919);
+	mtsdram(DDR0_20, 0x0B0B0B0B);
+	mtsdram(DDR0_21, 0x0B0B0B0B);
+	mtsdram(DDR0_22, 0x00267F0B);
+	mtsdram(DDR0_23, 0x00000000);
+	mtsdram(DDR0_24, 0x01010002);
+	mtsdram(DDR0_26, 0x5B260181);
+	mtsdram(DDR0_27, 0x0000682B);
+	mtsdram(DDR0_28, 0x00000000);
+	mtsdram(DDR0_31, 0x00000000);
+	mtsdram(DDR0_42, 0x01000006);
+	mtsdram(DDR0_43, 0x050A0200);
+	mtsdram(DDR0_44, 0x00000005);
+	mtsdram(DDR0_02, 0x00000001);
+
+	/*
+	 * Wait for DCC master delay line to finish calibration
+	 */
+	mfsdram(DDR0_17, val);
+	while (((val >> 8) & 0x000007f) == 0) {
+		mfsdram(DDR0_17, val);
+	}
+#endif /* #ifndef CONFIG_NAND_U_BOOT */
+
+	return (CFG_MBYTES_SDRAM << 20);
+}