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-rw-r--r--board/icecube/icecube.c116
1 files changed, 116 insertions, 0 deletions
diff --git a/board/icecube/icecube.c b/board/icecube/icecube.c
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+/*
+ * (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 */
+}