From e31d2c1e2bc954dc32e33bb2076139f85b95f8e6 Mon Sep 17 00:00:00 2001
From: Jon Loeliger <jdl@freescale.com>
Date: Tue, 18 Mar 2008 13:51:06 -0500
Subject: FSL DDR: Convert MPC8548CDS to new DDR code.

Signed-off-by: Jon Loeliger <jdl@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
---
 board/freescale/mpc8548cds/Makefile     |  1 +
 board/freescale/mpc8548cds/ddr.c        | 80 +++++++++++++++++++++++++++++++++
 board/freescale/mpc8548cds/mpc8548cds.c |  8 +++-
 3 files changed, 88 insertions(+), 1 deletion(-)
 create mode 100644 board/freescale/mpc8548cds/ddr.c

(limited to 'board/freescale')

diff --git a/board/freescale/mpc8548cds/Makefile b/board/freescale/mpc8548cds/Makefile
index 98f1530..c19a527 100644
--- a/board/freescale/mpc8548cds/Makefile
+++ b/board/freescale/mpc8548cds/Makefile
@@ -27,6 +27,7 @@ include $(TOPDIR)/config.mk
 LIB	= $(obj)lib$(BOARD).a
 
 COBJS-y	+= $(BOARD).o
+COBJS-y	+= ddr.o
 COBJS-y	+= law.o
 COBJS-y	+= tlb.o
 
diff --git a/board/freescale/mpc8548cds/ddr.c b/board/freescale/mpc8548cds/ddr.c
new file mode 100644
index 0000000..f07d746
--- /dev/null
+++ b/board/freescale/mpc8548cds/ddr.c
@@ -0,0 +1,80 @@
+/*
+ * 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_ddr_freq(0);
+}
+
+void fsl_ddr_get_spd(ddr2_spd_eeprom_t *ctrl_dimms_spd,
+			unsigned int ctrl_num)
+{
+	unsigned int i;
+
+	if (ctrl_num) {
+		printf("%s unexpected ctrl_num = %u\n", __FUNCTION__, ctrl_num);
+		return;
+	}
+
+	for (i = 0; i < CONFIG_DIMM_SLOTS_PER_CTLR; i++) {
+		get_spd(&(ctrl_dimms_spd[i]), SPD_EEPROM_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/freescale/mpc8548cds/mpc8548cds.c b/board/freescale/mpc8548cds/mpc8548cds.c
index 0b037cc..84d3850 100644
--- a/board/freescale/mpc8548cds/mpc8548cds.c
+++ b/board/freescale/mpc8548cds/mpc8548cds.c
@@ -25,8 +25,10 @@
 #include <common.h>
 #include <pci.h>
 #include <asm/processor.h>
+#include <asm/mmu.h>
 #include <asm/immap_85xx.h>
 #include <asm/immap_fsl_pci.h>
+#include <asm/fsl_ddr_sdram.h>
 #include <spd_sdram.h>
 #include <miiphy.h>
 #include <libfdt.h>
@@ -111,7 +113,10 @@ initdram(int board_type)
 		udelay(200);
 	}
 #endif
-	dram_size = spd_sdram();
+
+	dram_size = fsl_ddr_sdram();
+	dram_size = setup_ddr_tlbs(dram_size / 0x100000);
+	dram_size *= 0x100000;
 
 #if defined(CONFIG_DDR_ECC) && !defined(CONFIG_ECC_INIT_VIA_DDRCONTROLLER)
 	/*
@@ -119,6 +124,7 @@ initdram(int board_type)
 	 */
 	ddr_enable_ecc(dram_size);
 #endif
+
 	/*
 	 * SDRAM Initialization
 	 */
-- 
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