* Add support for IceCube board (with MGT5100 and MPC5200 CPUs)

* Add support for MGT5100 and MPC5200 processors

1 files changed, 116 insertions, 0 deletions

diff --git a/board/icecube/icecube.c b/board/icecube/icecube.c
new file mode 100644
index 0000000..916e780
--- /dev/null
+++ b/board/icecube/icecube.c
@@ -0,0 +1,116 @@
+/*
+ * (C) Copyright 2003
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * 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 <mpc5xxx.h>
+
+long int initdram (int board_type)
+{
+#ifndef CFG_RAMBOOT
+	/* configure SDRAM start/end */
+#if defined(CONFIG_MPC5200)
+	*(vu_long *)MPC5XXX_SDRAM_CS0CFG = 0x00000018;/* 32M at 0x0 */
+	*(vu_long *)MPC5XXX_SDRAM_CS1CFG = 0x02000000;/* disabled */
+
+	/* setup config registers */
+	*(vu_long *)MPC5XXX_SDRAM_CONFIG1 = 0xc2233a00;
+	*(vu_long *)MPC5XXX_SDRAM_CONFIG2 = 0x88b70004;
+
+	/* unlock mode register */
+	*(vu_long *)MPC5XXX_SDRAM_CTRL = 0xd04f0000;
+	/* precharge all banks */
+	*(vu_long *)MPC5XXX_SDRAM_CTRL = 0xd04f0002;
+	/* set mode register */
+	*(vu_long *)MPC5XXX_SDRAM_MODE = 0x408d0000;
+	/* precharge all banks */
+	*(vu_long *)MPC5XXX_SDRAM_CTRL = 0xd04f0002;
+	/* auto refresh */
+	*(vu_long *)MPC5XXX_SDRAM_CTRL = 0xd04f0004;
+	/* set mode register */
+	*(vu_long *)MPC5XXX_SDRAM_MODE = 0x008d0000;
+	/* normal operation */
+	*(vu_long *)MPC5XXX_SDRAM_CTRL = 0x504f0000;
+#elif defined(CONFIG_MGT5100)
+	*(vu_long *)MPC5XXX_SDRAM_START = 0x00000000;
+	*(vu_long *)MPC5XXX_SDRAM_STOP = 0x000007ff;/* 64M */
+	*(vu_long *)MPC5XXX_ADDECR |= (1 << 22); /* Enable SDRAM */
+
+	/* setup config registers */
+	*(vu_long *)MPC5XXX_SDRAM_CONFIG1 = 0xc2222600;
+	*(vu_long *)MPC5XXX_SDRAM_CONFIG2 = 0x88b70004;
+
+	/* address select register */
+	*(vu_long *)MPC5XXX_SDRAM_XLBSEL = 0x03000000;
+
+	/* unlock mode register */
+	*(vu_long *)MPC5XXX_SDRAM_CTRL = 0xd14f0000;
+	/* precharge all banks */
+	*(vu_long *)MPC5XXX_SDRAM_CTRL = 0xd14f0002;
+	/* set mode register */
+	*(vu_long *)MPC5XXX_SDRAM_MODE = 0x008d0000;
+	/* precharge all banks */
+	*(vu_long *)MPC5XXX_SDRAM_CTRL = 0xd14f0002;
+	/* auto refresh */
+	*(vu_long *)MPC5XXX_SDRAM_CTRL = 0xd14f0004;
+	/* set mode register */
+	*(vu_long *)MPC5XXX_SDRAM_MODE = 0x008d0000;
+	/* normal operation */
+	*(vu_long *)MPC5XXX_SDRAM_CTRL = 0x514f0000;
+#endif
+#else
+#ifdef CONFIG_MGT5100
+	*(vu_long *)MPC5XXX_ADDECR |= (1 << 22); /* Enable SDRAM */
+#endif
+#endif
+	/* return total ram size */
+#if defined(CONFIG_MGT5100)
+	return (64 * 1024 * 1024);
+#elif defined(CONFIG_MPC5200)
+	return (32 * 1024 * 1024);
+#endif
+}
+
+int checkboard (void)
+{
+#if defined(CONFIG_MPC5200)
+	puts ("Board: Motorola MPC5200 (IceCube)\n");
+#elif defined(CONFIG_MGT5100)
+	puts ("Board: Motorola MGT5100 (IceCube)\n");
+#endif
+	return 0;
+}
+
+void flash_preinit(void)
+{
+	/*
+	 * Now, when we are in RAM, enable flash write
+	 * access for detection process.
+	 * Note that CS_BOOT cannot be cleared when
+	 * executing in flash.
+	 */
+#if defined(CONFIG_MGT5100)
+	*(vu_long *)MPC5XXX_ADDECR &= ~(1 << 25); /* disable CS_BOOT */
+	*(vu_long *)MPC5XXX_ADDECR |= (1 << 16); /* enable CS0 */
+#endif
+	*(vu_long *)MPC5XXX_BOOTCS_CFG &= ~0x1; /* clear RO */
+}