diff options
Diffstat (limited to 'board/sbc8641d')
| -rw-r--r-- | board/sbc8641d/Makefile | 8 | ||||
| -rw-r--r-- | board/sbc8641d/ddr.c | 88 | ||||
| -rw-r--r-- | board/sbc8641d/sbc8641d.c | 5 |
3 files changed, 95 insertions, 6 deletions
diff --git a/board/sbc8641d/Makefile b/board/sbc8641d/Makefile index c096e15..c78b0a8 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 0000000..5163abf --- /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 c724eff..62b48c8 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 |