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authorZachary P. Landau <zachary.landau@labxtechnologies.com>2006-01-26 17:37:59 -0500
committerZachary P. Landau <zachary.landau@labxtechnologies.com>2006-01-26 17:37:59 -0500
commit3a108ed8682e8dab8bf301e91db1999d4cf88c55 (patch)
tree321bd1abc4304eb054c4c69009480f10e3424701 /board/r5200/r5200.c
parenteacbd317757327e8e7f018f5701c950429c4c6ae (diff)
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Add support for r5200 board
Diffstat (limited to 'board/r5200/r5200.c')
-rw-r--r--board/r5200/r5200.c125
1 files changed, 125 insertions, 0 deletions
diff --git a/board/r5200/r5200.c b/board/r5200/r5200.c
new file mode 100644
index 0000000..e51ad25
--- /dev/null
+++ b/board/r5200/r5200.c
@@ -0,0 +1,125 @@
+/*
+ * (C) Copyright 2000-2003
+ * 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 <asm/m5271.h>
+#include <asm/immap_5271.h>
+
+
+int checkboard (void) {
+ puts ("Board: R5200 Ethernet Module\n");
+ return 0;
+};
+
+long int initdram (int board_type) {
+ int i;
+
+ /*
+ * Set CS2 pin to be SD_CS0
+ */
+ mbar_writeByte(MCF_GPIO_PAR_CS, mbar_readByte(MCF_GPIO_PAR_CS)
+ | MCF_GPIO_PAR_CS_PAR_CS2);
+
+ mbar_writeByte(MCF_GPIO_PAR_SDRAM, mbar_readByte(MCF_GPIO_PAR_SDRAM)
+ | MCF_GPIO_PAR_SDRAM_PAR_CSSDCS(0x01));
+
+ /*
+ * Check to see if the SDRAM has already been initialized
+ * by a run control tool
+ */
+ if (!(mbar_readLong(MCF_SDRAMC_DACR0) & MCF_SDRAMC_DACRn_RE))
+ {
+ /*
+ * Initialize DRAM Control Register: DCR
+ */
+ mbar_writeShort(MCF_SDRAMC_DCR, MCF_SDRAMC_DCR_RTIM(0x01)
+ | MCF_SDRAMC_DCR_RC(0x30));
+
+ /*
+ * Initialize DACR0
+ */
+ mbar_writeLong(MCF_SDRAMC_DACR0,
+ MCF_SDRAMC_DACRn_BA(CFG_SDRAM_BASE>>18)
+ | MCF_SDRAMC_DACRn_CASL(0)
+ | MCF_SDRAMC_DACRn_CBM(3)
+ | MCF_SDRAMC_DACRn_PS(2));
+
+ /*
+ * Initialize DMR0
+ */
+ mbar_writeLong(MCF_SDRAMC_DMR0,
+ MCF_SDRAMC_DMRn_BAM_8M
+ | MCF_SDRAMC_DMRn_V);
+
+ /*
+ * Set IP bit in DACR
+ */
+ mbar_writeLong(MCF_SDRAMC_DACR0, mbar_readLong(MCF_SDRAMC_DACR0)
+ | MCF_SDRAMC_DACRn_IP);
+
+ /*
+ * Wait at least 20ns to allow banks to precharge
+ */
+ for (i = 0; i < 5; i++)
+ asm(" nop");
+
+ /*
+ * Write to this block to initiate precharge
+ */
+ *(u16 *)(CFG_SDRAM_BASE) = 0x9696;
+
+ /*
+ * Set RE bit in DACR
+ */
+ mbar_writeLong(MCF_SDRAMC_DACR0, mbar_readLong(MCF_SDRAMC_DACR0)
+ | MCF_SDRAMC_DACRn_RE);
+
+
+ /*
+ * Wait for at least 8 auto refresh cycles to occur
+ */
+ for (i = 0; i < 2000; i++)
+ asm(" nop");
+
+ /*
+ * Finish the configuration by issuing the MRS.
+ */
+ mbar_writeLong(MCF_SDRAMC_DACR0, mbar_readLong(MCF_SDRAMC_DACR0)
+ | MCF_SDRAMC_DACRn_MRS);
+
+
+ /*
+ * Write to the SDRAM Mode Register
+ */
+ *(u16 *)(CFG_SDRAM_BASE + 0x1000) = 0x9696;
+ }
+
+ return CFG_SDRAM_SIZE * 1024 * 1024;
+};
+
+int testdram (void) {
+ /* TODO: XXX XXX XXX */
+ printf ("DRAM test not implemented!\n");
+
+ return (0);
+}