X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=board%2Ffreescale%2Fm52277evb%2Fm52277evb.c;h=a1127e52a39d56887bd85f3b8d88ce7a02d65d86;hb=6612ab33956ae09c5ba2fde9c1540b519625ba37;hp=e5f47d2d93860b774ae9223a6773b725bd396fbc;hpb=9973e3c614721bbf169882ffc3be266a6611cd60;p=oweals%2Fu-boot.git

diff --git a/board/freescale/m52277evb/m52277evb.c b/board/freescale/m52277evb/m52277evb.c
index e5f47d2d93..a1127e52a3 100644
--- a/board/freescale/m52277evb/m52277evb.c
+++ b/board/freescale/m52277evb/m52277evb.c
@@ -2,30 +2,15 @@
  * (C) Copyright 2000-2003
  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
  *
- * Copyright (C) 2004-2007 Freescale Semiconductor, Inc.
+ * Copyright (C) 2004-2007, 2012 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
+ * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #include <common.h>
 #include <asm/immap.h>
+#include <asm/io.h>
 
 DECLARE_GLOBAL_DATA_PTR;
 
@@ -38,10 +23,20 @@ int checkboard(void)
 
 phys_size_t initdram(int board_type)
 {
-	volatile sdramc_t *sdram = (volatile sdramc_t *)(MMAP_SDRAM);
-	u32 dramsize, i;
+	u32 dramsize;
 
-	dramsize = CFG_SDRAM_SIZE * 0x100000;
+#ifdef CONFIG_CF_SBF
+	/*
+	 * Serial Boot: The dram is already initialized in start.S
+	 * only require to return DRAM size
+	 */
+	dramsize = CONFIG_SYS_SDRAM_SIZE * 0x100000;
+#else
+	sdramc_t *sdram = (sdramc_t *)(MMAP_SDRAM);
+	gpio_t *gpio = (gpio_t *)(MMAP_GPIO);
+	u32 i;
+
+	dramsize = CONFIG_SYS_SDRAM_SIZE * 0x100000;
 
 	for (i = 0x13; i < 0x20; i++) {
 		if (dramsize == (1 << i))
@@ -49,31 +44,40 @@ phys_size_t initdram(int board_type)
 	}
 	i--;
 
-	sdram->sdcs0 = (CFG_SDRAM_BASE | i);
+	out_8(&gpio->mscr_sdram, CONFIG_SYS_SDRAM_DRV_STRENGTH);
+
+	out_be32(&sdram->sdcs0, CONFIG_SYS_SDRAM_BASE | i);
 
-	sdram->sdcfg1 = CFG_SDRAM_CFG1;
-	sdram->sdcfg2 = CFG_SDRAM_CFG2;
+	out_be32(&sdram->sdcfg1, CONFIG_SYS_SDRAM_CFG1);
+	out_be32(&sdram->sdcfg2, CONFIG_SYS_SDRAM_CFG2);
 
 	/* Issue PALL */
-	sdram->sdcr = CFG_SDRAM_CTRL | 2;
+	out_be32(&sdram->sdcr, CONFIG_SYS_SDRAM_CTRL | 2);
+	__asm__("nop");
 
 	/* Issue LEMR */
-	/*sdram->sdmr = CFG_SDRAM_EMOD; */
-	sdram->sdmr = CFG_SDRAM_MODE;
+	out_be32(&sdram->sdmr, CONFIG_SYS_SDRAM_MODE);
+	__asm__("nop");
+	out_be32(&sdram->sdmr, CONFIG_SYS_SDRAM_EMOD);
+	__asm__("nop");
 
 	udelay(1000);
 
 	/* Issue PALL */
-	sdram->sdcr = CFG_SDRAM_CTRL | 2;
+	out_be32(&sdram->sdcr, CONFIG_SYS_SDRAM_CTRL | 2);
+	__asm__("nop");
 
 	/* Perform two refresh cycles */
-	sdram->sdcr = CFG_SDRAM_CTRL | 4;
-	sdram->sdcr = CFG_SDRAM_CTRL | 4;
+	out_be32(&sdram->sdcr, CONFIG_SYS_SDRAM_CTRL | 4);
+	__asm__("nop");
+	out_be32(&sdram->sdcr, CONFIG_SYS_SDRAM_CTRL | 4);
+	__asm__("nop");
 
-	sdram->sdcr = (CFG_SDRAM_CTRL & ~0x80000000) | 0x10000c00;
+	out_be32(&sdram->sdcr,
+		(CONFIG_SYS_SDRAM_CTRL & ~0x80000000) | 0x10000c00);
 
 	udelay(100);
-
+#endif
 	return (dramsize);
 };