ColdFire: Add M5249EVB platform for MCF52x2

Signed-off-by: TsiChungLiew <Tsi-Chung.Liew@freescale.com>

1 files changed, 114 insertions, 0 deletions

diff --git a/board/freescale/m5249evb/m5249evb.c b/board/freescale/m5249evb/m5249evb.c
new file mode 100644
index 0000000..b0bf413
--- /dev/null
+++ b/board/freescale/m5249evb/m5249evb.c
@@ -0,0 +1,114 @@
+/*
+ * (C) Copyright 2004
+ * 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 <command.h>
+#include <malloc.h>
+#include <asm/immap.h>
+
+
+/* Prototypes */
+int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);
+
+int checkboard (void) {
+	ulong val;
+	uchar val8;
+
+	puts ("Board: ");
+	puts("Freescale M5249EVB");
+	val8 = ((uchar)~((uchar)mbar2_readLong(MCFSIM_GPIO1_READ) >> 4)) & 0xf;
+	printf(" (Switch=%1X)\n", val8);
+
+	/*
+	 * Set LED on
+	 */
+	val = mbar2_readLong(MCFSIM_GPIO1_OUT) & ~CFG_GPIO1_LED;
+	mbar2_writeLong(MCFSIM_GPIO1_OUT, val);   /* Set LED on */
+
+	return 0;
+};
+
+
+long int initdram (int board_type) {
+	unsigned long	junk = 0xa5a59696;
+
+	/*
+	 *  Note:
+	 *	RC = ([(RefreshTime/#rows) / (1/BusClk)] / 16) - 1
+	 */
+
+#ifdef CFG_FAST_CLK
+	/*
+	 * Busclk=70MHz, RefreshTime=64ms, #rows=4096 (4K)
+	 * SO=1, NAM=0, COC=0, RTIM=01 (6clk refresh), RC=39
+	 */
+	mbar_writeShort(MCFSIM_DCR, 0x8239);
+#elif CFG_PLL_BYPASS
+	/*
+	 * Busclk=5.6448MHz, RefreshTime=64ms, #rows=8192 (8K)
+	 * SO=1, NAM=0, COC=0, RTIM=01 (6clk refresh), RC=02
+	 */
+	mbar_writeShort(MCFSIM_DCR, 0x8202);
+#else
+	/*
+	 * Busclk=36MHz, RefreshTime=64ms, #rows=4096 (4K)
+	 * SO=1, NAM=0, COC=0, RTIM=01 (6clk refresh), RC=22 (562 bus clock cycles)
+	 */
+	mbar_writeShort(MCFSIM_DCR, 0x8222);
+#endif
+
+	/*
+	 * SDRAM starts at 0x0000_0000, CASL=10, CBM=010, PS=10 (16bit port),
+	 * PM=1 (continuous page mode)
+	 */
+
+	/* RE=0 (keep auto-refresh disabled while setting up registers) */
+	mbar_writeLong(MCFSIM_DACR0, 0x00003324);
+
+	/* BAM=007c (bits 22,21 are bank selects; 256kB blocks) */
+	mbar_writeLong(MCFSIM_DMR0, 0x01fc0001);
+
+	/** Precharge sequence **/
+	mbar_writeLong(MCFSIM_DACR0, 0x0000332c); /* Set DACR0[IP] (bit 3) */
+	*((volatile unsigned long *) 0x00) = junk; /* write to a memory location to init. precharge */
+	udelay(0x10); /* Allow several Precharge cycles */
+
+	/** Refresh Sequence **/
+	mbar_writeLong(MCFSIM_DACR0, 0x0000b324); /* Enable the refresh bit, DACR0[RE] (bit 15) */
+	udelay(0x7d0); /* Allow gobs of refresh cycles */
+
+	/** Mode Register initialization **/
+	mbar_writeLong(MCFSIM_DACR0, 0x0000b364);  /* Enable DACR0[IMRS] (bit 6); RE remains enabled */
+	*((volatile unsigned long *) 0x800) = junk; /* Access RAM to initialize the mode register */
+
+	return CFG_SDRAM_SIZE * 1024 * 1024;
+};
+
+
+int testdram (void) {
+	/* TODO: XXX XXX XXX */
+	printf ("DRAM test not implemented!\n");
+
+	return (0);
+}
+