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+/*
+ * dramSetup.h
+ *
+ * Prototypes, etc. for the Motorola MPC8220
+ * embedded cpu chips
+ *
+ * 2004 (c) Freescale, Inc.
+ * Author: 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
+ */
+#ifndef __INCdramsetuph
+#define __INCdramsetuph
+#ifndef __ASSEMBLY__
+/* Where various things are in the SPD */
+#define LOC_TYPE 2
+#define LOC_CHECKSUM 63
+#define LOC_PHYS_BANKS 5
+#define LOC_LOGICAL_BANKS 17
+#define LOC_ROWS 3
+#define LOC_COLS 4
+#define LOC_WIDTH_HIGH 7
+#define LOC_WIDTH_LOW 6
+#define LOC_REFRESH 12
+#define LOC_BURSTS 16
+#define LOC_CAS 18
+#define LOC_CS 19
+#define LOC_WE 20
+#define LOC_Tcyc 9
+#define LOC_Tac 10
+#define LOC_Trp 27
+#define LOC_Trrd 28
+#define LOC_Trcd 29
+#define LOC_Tras 30
+#define LOC_Buffered 21
+/* Types of memory the SPD can tell us about.
+ * We can actually only use SDRAM and DDR.
+ */
+#define TYPE_DRAM 1 /* plain old dram */
+#define TYPE_EDO 2 /* EDO dram */
+#define TYPE_Nibble 3 /* serial nibble memory */
+#define TYPE_SDR 4 /* SDRAM */
+#define TYPE_ROM 5 /* */
+#define TYPE_SGRRAM 6 /* graphics memory */
+#define TYPE_DDR 7 /* DDR sdram */
+#define SDRAMDS_MASK 0x3 /* each field is 2 bits wide */
+#define SDRAMDS_SBE_SHIFT 8 /* Clock enable drive strength */
+#define SDRAMDS_SBC_SHIFT 6 /* Clocks drive strength */
+#define SDRAMDS_SBA_SHIFT 4 /* Address drive strength */
+#define SDRAMDS_SBS_SHIFT 2 /* SDR DQS drive strength */
+#define SDRAMDS_SBD_SHIFT 0 /* Data and DQS drive strength */
+#define DRIVE_STRENGTH_HIGH 0
+#define DRIVE_STRENGTH_MED 1
+#define DRIVE_STRENGTH_LOW 2
+#define DRIVE_STRENGTH_OFF 3
+
+#define OK 0
+#define ERROR -1
+/* Structure to hold information about address muxing. */
+ typedef struct tagMuxDescriptor {
+ u8 MuxValue;
+ u8 Columns;
+ u8 Rows;
+ u8 MoreColumns;
+} muxdesc_t;
+
+/* Structure to define one physical bank of
+ * memory. Note that dram size in bytes is
+ * (2^^(rows+columns)) * width * banks / 8
+*/
+typedef struct tagDramInfo {
+ u32 size; /* size in bytes */
+ u32 base; /* base address */
+ u8 ordinal; /* where in the memory map will we put this */
+ u8 type;
+ u8 rows;
+ u8 cols;
+ u16 width; /* width of each chip in bits */
+ u8 banks; /* number of chips, aka logical banks */
+ u8 bursts; /* bit-encoded allowable burst length */
+ u8 CAS; /* bit-encoded CAS latency values */
+ u8 CS; /* bit-encoded CS latency values */
+ u8 WE; /* bit-encoded WE latency values */
+ u8 Trp; /* bit-encoded row precharge time */
+ u8 Trcd; /* bit-encoded RAS to CAS delay */
+ u8 buffered; /* buffered or not */
+ u8 refresh; /* encoded refresh rate */
+} draminfo_t;
+
+#endif /* __ASSEMBLY__ */
+
+#endif /* __INCdramsetuph */