From 9bd4e5911b750837515466bc7449087698b88e0e Mon Sep 17 00:00:00 2001
From: Kumar Gala <galak@kernel.crashing.org>
Date: Tue, 26 Aug 2008 15:01:37 -0500
Subject: [PATCH] FSL DDR: Convert SBC8641D to new DDR code.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
---
 board/sbc8641d/Makefile    |  8 ++--
 board/sbc8641d/ddr.c       | 88 ++++++++++++++++++++++++++++++++++++++
 board/sbc8641d/sbc8641d.c  |  5 +--
 include/configs/sbc8641d.h |  6 ++-
 4 files changed, 99 insertions(+), 8 deletions(-)
 create mode 100644 board/sbc8641d/ddr.c

diff --git a/board/sbc8641d/Makefile b/board/sbc8641d/Makefile
index c096e1552e..c78b0a8280 100644
--- a/board/sbc8641d/Makefile
+++ b/board/sbc8641d/Makefile
@@ -25,10 +25,12 @@ include $(TOPDIR)/config.mk
 
 LIB	= $(obj)lib$(BOARD).a
 
-COBJS	:= $(BOARD).o law.o
+COBJS-y	+= $(BOARD).o
+COBJS-y	+= law.o
+COBJS-$(CONFIG_FSL_DDR2) += ddr.o
 
-SRCS	:= $(SOBJS:.o=.S) $(COBJS:.o=.c)
-OBJS	:= $(addprefix $(obj),$(COBJS))
+SRCS	:= $(SOBJS:.o=.S) $(COBJS-y:.o=.c)
+OBJS	:= $(addprefix $(obj),$(COBJS-y))
 SOBJS	:= $(addprefix $(obj),$(SOBJS))
 
 $(LIB):	$(obj).depend $(OBJS) $(SOBJS)
diff --git a/board/sbc8641d/ddr.c b/board/sbc8641d/ddr.c
new file mode 100644
index 0000000000..5163abf052
--- /dev/null
+++ b/board/sbc8641d/ddr.c
@@ -0,0 +1,88 @@
+/*
+ * Copyright 2008 Freescale Semiconductor, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * Version 2 as published by the Free Software Foundation.
+ */
+
+#include <common.h>
+#include <i2c.h>
+
+#include <asm/fsl_ddr_sdram.h>
+
+static void
+get_spd(ddr2_spd_eeprom_t *spd, unsigned char i2c_address)
+{
+	i2c_read(i2c_address, 0, 1, (uchar *)spd, sizeof(ddr2_spd_eeprom_t));
+}
+
+unsigned int fsl_ddr_get_mem_data_rate(void)
+{
+	return get_bus_freq(0);
+}
+
+void fsl_ddr_get_spd(ddr2_spd_eeprom_t *ctrl_dimms_spd,
+		      unsigned int ctrl_num)
+{
+	unsigned int i;
+	unsigned int i2c_address = 0;
+
+	for (i = 0; i < CONFIG_DIMM_SLOTS_PER_CTLR; i++) {
+		if (ctrl_num == 0 && i == 0) {
+			i2c_address = SPD_EEPROM_ADDRESS1;
+		}
+		if (ctrl_num == 0 && i == 1) {
+			i2c_address = SPD_EEPROM_ADDRESS2;
+		}
+		if (ctrl_num == 1 && i == 0) {
+			i2c_address = SPD_EEPROM_ADDRESS3;
+		}
+		if (ctrl_num == 1 && i == 1) {
+			i2c_address = SPD_EEPROM_ADDRESS4;
+		}
+		get_spd(&(ctrl_dimms_spd[i]), i2c_address);
+	}
+}
+
+void fsl_ddr_board_options(memctl_options_t *popts, unsigned int ctrl_num)
+{
+	/*
+	 * Factors to consider for clock adjust:
+	 *	- number of chips on bus
+	 *	- position of slot
+	 *	- DDR1 vs. DDR2?
+	 *	- ???
+	 *
+	 * This needs to be determined on a board-by-board basis.
+	 *	0110	3/4 cycle late
+	 *	0111	7/8 cycle late
+	 */
+	popts->clk_adjust = 7;
+
+	/*
+	 * Factors to consider for CPO:
+	 *	- frequency
+	 *	- ddr1 vs. ddr2
+	 */
+	popts->cpo_override = 10;
+
+	/*
+	 * Factors to consider for write data delay:
+	 *	- number of DIMMs
+	 *
+	 * 1 = 1/4 clock delay
+	 * 2 = 1/2 clock delay
+	 * 3 = 3/4 clock delay
+	 * 4 = 1   clock delay
+	 * 5 = 5/4 clock delay
+	 * 6 = 3/2 clock delay
+	 */
+	popts->write_data_delay = 3;
+
+	/*
+	 * Factors to consider for half-strength driver enable:
+	 *	- number of DIMMs installed
+	 */
+	popts->half_strength_driver_enable = 0;
+}
diff --git a/board/sbc8641d/sbc8641d.c b/board/sbc8641d/sbc8641d.c
index c724effa06..62b48c8363 100644
--- a/board/sbc8641d/sbc8641d.c
+++ b/board/sbc8641d/sbc8641d.c
@@ -34,7 +34,7 @@
 #include <asm/processor.h>
 #include <asm/immap_86xx.h>
 #include <asm/immap_fsl_pci.h>
-#include <spd_sdram.h>
+#include <asm/fsl_ddr_sdram.h>
 #include <libfdt.h>
 #include <fdt_support.h>
 
@@ -42,7 +42,6 @@
 extern void ddr_enable_ecc (unsigned int dram_size);
 #endif
 
-void sdram_init (void);
 long int fixed_sdram (void);
 
 int board_early_init_f (void)
@@ -62,7 +61,7 @@ phys_size_t initdram (int board_type)
 	long dram_size = 0;
 
 #if defined(CONFIG_SPD_EEPROM)
-	dram_size = spd_sdram ();
+	dram_size = fsl_ddr_sdram();
 #else
 	dram_size = fixed_sdram ();
 #endif
diff --git a/include/configs/sbc8641d.h b/include/configs/sbc8641d.h
index efc787e999..ddca527c4e 100644
--- a/include/configs/sbc8641d.h
+++ b/include/configs/sbc8641d.h
@@ -61,8 +61,6 @@
 #define CONFIG_HIGH_BATS	1	/* High BATs supported and enabled */
 
 #undef CONFIG_SPD_EEPROM		/* Do not use SPD EEPROM for DDR setup*/
-#undef CONFIG_DDR_DLL			/* possible DLL fix needed */
-#define CONFIG_DDR_2T_TIMING		/* Sets the 2T timing bit */
 #undef CONFIG_DDR_ECC			/* only for ECC DDR module */
 #define CONFIG_ECC_INIT_VIA_DDRCONTROLLER	/* DDR controller or DMA? */
 #define CONFIG_MEM_INIT_VALUE		0xDeadBeef
@@ -114,6 +112,10 @@
 
 #define MPC86xx_DDR_SDRAM_CLK_CNTL
 
+#define CONFIG_NUM_DDR_CONTROLLERS	2
+#define CONFIG_DIMM_SLOTS_PER_CTLR	2
+#define CONFIG_CHIP_SELECTS_PER_CTRL	(2 * CONFIG_DIMM_SLOTS_PER_CTLR)
+
 #if defined(CONFIG_SPD_EEPROM)
     /*
      * Determine DDR configuration from I2C interface.
-- 
2.39.5