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| author | Matthew McClintock <msm@freescale.com> | 2012-08-13 10:00:40 +0000 |
|---|---|---|
| committer | Andy Fleming <afleming@freescale.com> | 2012-08-23 10:24:17 -0500 |
| commit | 02ea538ce9fa8325f7d15c69cf87c950c5fe1f57 (patch) | |
| tree | 15066f5b6df8b756f4fbb264ccf32522d8e27dbf /nand_spl/board | |
| parent | 8c454047fe9c08a51410dca01b945cdcecb18b7e (diff) | |
| download | u-boot-imx-02ea538ce9fa8325f7d15c69cf87c950c5fe1f57.zip u-boot-imx-02ea538ce9fa8325f7d15c69cf87c950c5fe1f57.tar.gz u-boot-imx-02ea538ce9fa8325f7d15c69cf87c950c5fe1f57.tar.bz2 | |
nand_spl: p1023rds: wait before enabling DDR controller
We have a requirement to wait a period of time before enabling the
DDR controller
Signed-off-by: Matthew McClintock <msm@freescale.com>
Signed-off-by: Andy Fleming <afleming@freescale.com>
Diffstat (limited to 'nand_spl/board')
| -rw-r--r-- | nand_spl/board/freescale/p1023rds/Makefile | 6 | ||||
| -rw-r--r-- | nand_spl/board/freescale/p1023rds/nand_boot.c | 19 |
2 files changed, 20 insertions, 5 deletions
diff --git a/nand_spl/board/freescale/p1023rds/Makefile b/nand_spl/board/freescale/p1023rds/Makefile index 168e868..da43521 100644 --- a/nand_spl/board/freescale/p1023rds/Makefile +++ b/nand_spl/board/freescale/p1023rds/Makefile @@ -34,7 +34,8 @@ CFLAGS += -DCONFIG_NAND_SPL SOBJS = start.o resetvec.o COBJS = cache.o cpu_init_early.o cpu_init_nand.o fsl_law.o law.o \ - nand_boot.o nand_boot_fsl_elbc.o ns16550.o tlb.o tlb_table.o + nand_boot.o nand_boot_fsl_elbc.o ns16550.o tlb.o tlb_table.o \ + ../common.o SRCS := $(addprefix $(obj),$(SOBJS:.o=.S) $(COBJS:.o=.c)) OBJS := $(addprefix $(obj),$(SOBJS) $(COBJS)) @@ -114,6 +115,9 @@ ifneq ($(OBJTREE), $(SRCTREE)) $(obj)nand_boot.c: @rm -f $(obj)nand_boot.c ln -s $(SRCTREE)/nand_spl/board/$(BOARDDIR)/nand_boot.c $(obj)nand_boot.c +$(obj)../common.c: + @rm -f $(obj)../common.c + ln -s $(SRCTREE)/nand_spl/board/freescale/common.c $(obj)../common.c endif ######################################################################### diff --git a/nand_spl/board/freescale/p1023rds/nand_boot.c b/nand_spl/board/freescale/p1023rds/nand_boot.c index 0065c87..6ab1f50 100644 --- a/nand_spl/board/freescale/p1023rds/nand_boot.c +++ b/nand_spl/board/freescale/p1023rds/nand_boot.c @@ -25,6 +25,10 @@ #include <asm/io.h> #include <nand.h> #include <asm/fsl_law.h> +#include <asm/fsl_ddr_sdram.h> +#include <asm/global_data.h> + +DECLARE_GLOBAL_DATA_PTR; /* Fixed sdram init -- doesn't use serial presence detect. */ void sdram_init(void) @@ -53,20 +57,27 @@ void sdram_init(void) out_be32(&ddr->ddr_wrlvl_cntl, CONFIG_SYS_DDR_WRLVL_CNTL); out_be32(&ddr->ddr_cdr1, CONFIG_SYS_DDR_CDR_1); out_be32(&ddr->ddr_cdr2, CONFIG_SYS_DDR_CDR_2); - out_be32(&ddr->sdram_cfg, CONFIG_SYS_DDR_CONTROL); + /* Set, but do not enable the memory */ + out_be32(&ddr->sdram_cfg, CONFIG_SYS_DDR_CONTROL & ~SDRAM_CFG_MEM_EN); + + asm volatile("sync;isync"); + udelay(500); + + /* Let the controller go */ + out_be32(&ddr->sdram_cfg, in_be32(&ddr->sdram_cfg) | SDRAM_CFG_MEM_EN); } void board_init_f(ulong bootflag) { - u32 plat_ratio, bus_clk; + u32 plat_ratio; ccsr_gur_t *gur = (void *)CONFIG_SYS_MPC85xx_GUTS_ADDR; /* initialize selected port with appropriate baud rate */ plat_ratio = in_be32(&gur->porpllsr) & MPC85xx_PORPLLSR_PLAT_RATIO; plat_ratio >>= 1; - bus_clk = CONFIG_SYS_CLK_FREQ * plat_ratio; + gd->bus_clk = CONFIG_SYS_CLK_FREQ * plat_ratio; NS16550_init((NS16550_t)CONFIG_SYS_NS16550_COM1, - bus_clk / 16 / CONFIG_BAUDRATE); + gd->bus_clk / 16 / CONFIG_BAUDRATE); puts("\nNAND boot... "); /* Initialize the DDR3 */ |