ColdFire: Add M5235EVB Platform for MCF523x
Signed-off-by: TsiChungLiew <Tsi-Chung.Liew@freescale.com>
diff --git a/board/freescale/m5235evb/m5235evb.c b/board/freescale/m5235evb/m5235evb.c
new file mode 100644
index 0000000..585854c
--- /dev/null
+++ b/board/freescale/m5235evb/m5235evb.c
@@ -0,0 +1,117 @@
+/*
+ * (C) Copyright 2000-2003
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * Copyright (C) 2004-2007 Freescale Semiconductor, Inc.
+ * TsiChung Liew (Tsi-Chung.Liew@freescale.com)
+ *
+ * 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 <config.h>
+#include <common.h>
+#include <asm/immap.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+int checkboard(void)
+{
+ puts("Board: ");
+ puts("Freescale M5235 EVB\n");
+ return 0;
+};
+
+long int initdram(int board_type)
+{
+ volatile sdram_t *sdram = (volatile sdram_t *)(MMAP_SDRAM);
+ volatile gpio_t *gpio = (volatile gpio_t *)(MMAP_GPIO);
+ u32 dramsize, i, dramclk;
+
+ /*
+ * When booting from external Flash, the port-size is less than
+ * the port-size of SDRAM. In this case it is necessary to enable
+ * Data[15:0] on Port Address/Data.
+ */
+ gpio->par_ad =
+ GPIO_PAR_AD_ADDR23 | GPIO_PAR_AD_ADDR22 | GPIO_PAR_AD_ADDR21 |
+ GPIO_PAR_AD_DATAL;
+
+ /* Initialize PAR to enable SDRAM signals */
+ gpio->par_sdram =
+ GPIO_PAR_SDRAM_SDWE | GPIO_PAR_SDRAM_SCAS | GPIO_PAR_SDRAM_SRAS |
+ GPIO_PAR_SDRAM_SCKE | GPIO_PAR_SDRAM_SDCS(3);
+
+ dramsize = CFG_SDRAM_SIZE * 0x100000;
+ for (i = 0x13; i < 0x20; i++) {
+ if (dramsize == (1 << i))
+ break;
+ }
+ i--;
+
+ if (!(sdram->dacr0 & SDRAMC_DARCn_RE)) {
+ dramclk = gd->bus_clk / (CFG_HZ * CFG_HZ);
+
+ /* Initialize DRAM Control Register: DCR */
+ sdram->dcr = SDRAMC_DCR_RTIM_9CLKS |
+ SDRAMC_DCR_RTIM_6CLKS | SDRAMC_DCR_RC((15 * dramclk) >> 4);
+
+ /* Initialize DACR0 */
+ sdram->dacr0 =
+ SDRAMC_DARCn_BA(CFG_SDRAM_BASE) | SDRAMC_DARCn_CASL_C1 |
+ SDRAMC_DARCn_CBM_CMD20 | SDRAMC_DARCn_PS_32;
+
+ /* Initialize DMR0 */
+ sdram->dmr0 = ((dramsize - 1) & 0xFFFC0000) | SDRAMC_DMRn_V;
+
+ /* Set IP (bit 3) in DACR */
+ sdram->dacr0 |= SDRAMC_DARCn_IP;
+
+ /* Wait 30ns to allow banks to precharge */
+ for (i = 0; i < 5; i++) {
+ asm("nop");
+ }
+
+ /* Write to this block to initiate precharge */
+ *(u32 *) (CFG_SDRAM_BASE) = 0xA5A59696;
+
+ /* Set RE (bit 15) in DACR */
+ sdram->dacr0 |= SDRAMC_DARCn_RE;
+
+ /* Wait for at least 8 auto refresh cycles to occur */
+ for (i = 0; i < 0x2000; i++) {
+ asm("nop");
+ }
+
+ /* Finish the configuration by issuing the MRS. */
+ sdram->dacr0 |= SDRAMC_DARCn_IMRS;
+
+ /* Write to the SDRAM Mode Register */
+ *(u32 *) (CFG_SDRAM_BASE + 0x400) = 0xA5A59696;
+ }
+
+ return dramsize;
+};
+
+int testdram(void)
+{
+ /* TODO: XXX XXX XXX */
+ printf("DRAM test not implemented!\n");
+
+ return (0);
+}