Merge with /home/sr/git/u-boot/4xx-sdram

1 files changed, 78 insertions, 0 deletions

diff --git a/cpu/ppc4xx/sdram.h b/cpu/ppc4xx/sdram.h
new file mode 100644
index 0000000..62b5442
--- /dev/null
+++ b/cpu/ppc4xx/sdram.h
@@ -0,0 +1,78 @@
+/*
+ * (C) Copyright 2006
+ * Stefan Roese, DENX Software Engineering, sr@denx.de.
+ *
+ * (C) Copyright 2006
+ * DAVE Srl <www.dave-tech.it>
+ *
+ * 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
+ */
+
+#ifndef _SDRAM_H_
+#define _SDRAM_H_
+
+#include <config.h>
+
+#define mtsdram0(reg, data)  mtdcr(memcfga,reg);mtdcr(memcfgd,data)
+
+#define ONE_BILLION	1000000000
+
+struct sdram_conf_s {
+	unsigned long size;
+	int rows;
+	unsigned long reg;
+};
+
+typedef struct sdram_conf_s sdram_conf_t;
+
+/* Bitfields offsets */
+#define SDRAM0_TR_CASL		(31 - 8)
+#define SDRAM0_TR_PTA		(31 - 13)
+#define SDRAM0_TR_CTP		(31 - 15)
+#define SDRAM0_TR_LDF		(31 - 17)
+#define SDRAM0_TR_RFTA		(31 - 29)
+#define SDRAM0_TR_RCD		(31 - 31)
+
+#ifdef CFG_SDRAM_CL
+/* SDRAM timings [ns] according to AMCC/IBM names (see SDRAM_faq.doc) */
+#define CFG_SDRAM_CASL		CFG_SDRAM_CL
+#define CFG_SDRAM_PTA		CFG_SDRAM_tRP
+#define CFG_SDRAM_CTP		(CFG_SDRAM_tRC - CFG_SDRAM_tRCD - CFG_SDRAM_tRP)
+#define CFG_SDRAM_LDF		0
+#ifdef CFG_SDRAM_tRFC
+#define CFG_SDRAM_RFTA		CFG_SDRAM_tRFC
+#else
+#define CFG_SDRAM_RFTA		CFG_SDRAM_tRC
+#endif
+#define CFG_SDRAM_RCD		CFG_SDRAM_tRCD
+#endif /* #ifdef CFG_SDRAM_CL */
+
+/*
+ * Some defines for the 440 DDR controller
+ */
+#define SDRAM_CFG0_DC_EN	0x80000000	/* SDRAM Controller Enable	*/
+#define SDRAM_CFG0_MEMCHK	0x30000000	/* Memory data error checking mask*/
+#define SDRAM_CFG0_MEMCHK_NON	0x00000000	/* No ECC generation		*/
+#define SDRAM_CFG0_MEMCHK_GEN	0x20000000	/* ECC generation		*/
+#define SDRAM_CFG0_MEMCHK_CHK	0x30000000	/* ECC generation and checking	*/
+#define SDRAM_CFG0_DRAMWDTH	0x02000000	/* DRAM width mask		*/
+#define SDRAM_CFG0_DRAMWDTH_32	0x00000000	/* 32 bits			*/
+#define SDRAM_CFG0_DRAMWDTH_64	0x02000000	/* 64 bits			*/
+
+#endif