diff options
Diffstat (limited to 'board/freescale/mpc8555cds')
| -rw-r--r-- | board/freescale/mpc8555cds/Makefile | 1 | ||||
| -rw-r--r-- | board/freescale/mpc8555cds/ddr.c | 79 | ||||
| -rw-r--r-- | board/freescale/mpc8555cds/mpc8555cds.c | 8 |
3 files changed, 87 insertions, 1 deletions
diff --git a/board/freescale/mpc8555cds/Makefile b/board/freescale/mpc8555cds/Makefile index 98f1530..c19a527 100644 --- a/board/freescale/mpc8555cds/Makefile +++ b/board/freescale/mpc8555cds/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/mpc8555cds/ddr.c b/board/freescale/mpc8555cds/ddr.c new file mode 100644 index 0000000..11ce57d --- /dev/null +++ b/board/freescale/mpc8555cds/ddr.c @@ -0,0 +1,79 @@ +/* + * 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(ddr1_spd_eeprom_t *spd, unsigned char i2c_address) +{ + i2c_read(i2c_address, 0, 1, (uchar *)spd, sizeof(ddr1_spd_eeprom_t)); +} + +unsigned int fsl_ddr_get_mem_data_rate(void) +{ + return get_ddr_freq(0); +} + +void fsl_ddr_get_spd(ddr1_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_ADDRESS; + } + 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 = 6; + + /* + * Factors to consider for CPO: + * - frequency + * - ddr1 vs. ddr2 + */ + popts->cpo_override = 0; + + /* + * 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/mpc8555cds/mpc8555cds.c b/board/freescale/mpc8555cds/mpc8555cds.c index 9a65101..826056a 100644 --- a/board/freescale/mpc8555cds/mpc8555cds.c +++ b/board/freescale/mpc8555cds/mpc8555cds.c @@ -23,7 +23,9 @@ #include <common.h> #include <pci.h> #include <asm/processor.h> +#include <asm/mmu.h> #include <asm/immap_85xx.h> +#include <asm/fsl_ddr_sdram.h> #include <ioports.h> #include <spd_sdram.h> #include <libfdt.h> @@ -261,7 +263,10 @@ 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) /* @@ -269,6 +274,7 @@ initdram(int board_type) */ ddr_enable_ecc(dram_size); #endif + /* * SDRAM Initialization */ |