Signed-off-by: Kumar Gala galak@kernel.crashing.org --- board/socrates/Makefile | 13 +++++-- board/socrates/ddr.c | 80 ++++++++++++++++++++++++++++++++++++++++++++ board/socrates/sdram.c | 5 ++- include/configs/socrates.h | 29 ++++++++++------ 4 files changed, 111 insertions(+), 16 deletions(-) create mode 100644 board/socrates/ddr.c
diff --git a/board/socrates/Makefile b/board/socrates/Makefile index a41fead..6fae601 100644 --- a/board/socrates/Makefile +++ b/board/socrates/Makefile @@ -28,10 +28,15 @@ include $(TOPDIR)/config.mk LIB = $(obj)lib$(BOARD).a #
-COBJS := $(BOARD).o law.o tlb.o sdram.o nand.o - -SRCS := $(SOBJS:.o=.S) $(COBJS:.o=.c) -OBJS := $(addprefix $(obj),$(COBJS)) +COBJS-y += $(BOARD).o +COBJS-y += law.o +COBJS-y += tlb.o +COBJS-y += nand.o +COBJS-y += sdram.o +COBJS-$(CONFIG_FSL_DDR2) += ddr.o + +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/socrates/ddr.c b/board/socrates/ddr.c new file mode 100644 index 0000000..bbb5ee2 --- /dev/null +++ b/board/socrates/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/socrates/sdram.c b/board/socrates/sdram.c index 768fe05..12d1b8a 100644 --- a/board/socrates/sdram.c +++ b/board/socrates/sdram.c @@ -25,6 +25,7 @@ #include <common.h> #include <asm/processor.h> #include <asm/immap_85xx.h> +#include <asm/fsl_ddr_sdram.h> #include <asm/processor.h> #include <asm/mmu.h> #include <spd_sdram.h> @@ -80,7 +81,9 @@ 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(); + dram_size = setup_ddr_tlbs(dram_size / 0x100000); + dram_size *= 0x100000; #else dram_size = sdram_setup(CONFIG_DDR_DEFAULT_CL); #endif diff --git a/include/configs/socrates.h b/include/configs/socrates.h index 8a64942..15abec1 100644 --- a/include/configs/socrates.h +++ b/include/configs/socrates.h @@ -93,11 +93,25 @@ #define CFG_CCSRBAR_PHYS CFG_CCSRBAR /* physical addr of CCSRBAR */ #define CFG_IMMR CFG_CCSRBAR /* PQII uses CFG_IMMR */
-/* - * DDR Setup - */ -#define CFG_DDR_SDRAM_BASE 0x00000000 /* DDR is system memory */ +/* DDR Setup */ +#define CONFIG_FSL_DDR2 +#undef CONFIG_FSL_DDR_INTERACTIVE +#define CONFIG_SPD_EEPROM /* Use SPD EEPROM for DDR setup */ +#define CONFIG_DDR_SPD + +#undef CONFIG_ECC_INIT_VIA_DDRCONTROLLER /* DDR controller or DMA? */ +#define CONFIG_MEM_INIT_VALUE 0xDeadBeef + +#define CFG_DDR_SDRAM_BASE 0x00000000 #define CFG_SDRAM_BASE CFG_DDR_SDRAM_BASE +#define CONFIG_VERY_BIG_RAM + +#define CONFIG_NUM_DDR_CONTROLLERS 1 +#define CONFIG_DIMM_SLOTS_PER_CTLR 1 +#define CONFIG_CHIP_SELECTS_PER_CTRL 2 + +/* I2C addresses of SPD EEPROMs */ +#define SPD_EEPROM_ADDRESS 0x51 /* CTLR 0 DIMM 0 */
#define CONFIG_DDR_DEFAULT_CL 30 /* CAS latency 3 */
@@ -114,13 +128,6 @@ #define CFG_DDR_CLK_CONTROL 0x03800000 #define CFG_SDRAM_SIZE 256 /* in Megs */
-#define CONFIG_SPD_EEPROM 1 /* Use SPD EEPROM for DDR setup*/ -#define SPD_EEPROM_ADDRESS 0x50 /* DDR DIMM */ -#define MPC85xx_DDR_SDRAM_CLK_CNTL /* 85xx has clock control reg */ - -/* - * Flash on the Local Bus - */ /* * Flash on the LocalBus */