diff options
Diffstat (limited to 'cpu')
| -rw-r--r-- | cpu/mpc86xx/Makefile | 6 | ||||
| -rw-r--r-- | cpu/mpc86xx/ddr-8641.c | 86 |
2 files changed, 92 insertions, 0 deletions
diff --git a/cpu/mpc86xx/Makefile b/cpu/mpc86xx/Makefile index 454c72840..12ad66d36 100644 --- a/cpu/mpc86xx/Makefile +++ b/cpu/mpc86xx/Makefile @@ -39,6 +39,12 @@ COBJS-y += interrupts.o COBJS-$(CONFIG_OF_LIBFDT) += fdt.o +ifeq ($(CONFIG_FSL_DDR2),y) +COBJS-$(CONFIG_MPC8641) += ddr-8641.o +# 8610 & 8641 are identical w/regards to DDR +COBJS-$(CONFIG_MPC8610) += ddr-8641.o +endif + ifneq ($(CONFIG_FSL_DDR2),y) COBJS-y += spd_sdram.o endif diff --git a/cpu/mpc86xx/ddr-8641.c b/cpu/mpc86xx/ddr-8641.c new file mode 100644 index 000000000..932ef221c --- /dev/null +++ b/cpu/mpc86xx/ddr-8641.c @@ -0,0 +1,86 @@ +/* + * 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 <asm/io.h> +#include <asm/fsl_ddr_sdram.h> + +#if (CONFIG_CHIP_SELECTS_PER_CTRL > 4) +#error Invalid setting for CONFIG_CHIP_SELECTS_PER_CTRL +#endif + +void fsl_ddr_set_memctl_regs(const fsl_ddr_cfg_regs_t *regs, + unsigned int ctrl_num) +{ + unsigned int i; + volatile ccsr_ddr_t *ddr; + + switch (ctrl_num) { + case 0: + ddr = (void *)CFG_MPC86xx_DDR_ADDR; + break; + case 1: + ddr = (void *)CFG_MPC86xx_DDR2_ADDR; + break; + default: + printf("%s unexpected ctrl_num = %u\n", __FUNCTION__, ctrl_num); + return; + } + + for (i = 0; i < CONFIG_CHIP_SELECTS_PER_CTRL; i++) { + if (i == 0) { + out_be32(&ddr->cs0_bnds, regs->cs[i].bnds); + out_be32(&ddr->cs0_bnds, regs->cs[i].bnds); + out_be32(&ddr->cs0_config, regs->cs[i].config); + + } else if (i == 1) { + out_be32(&ddr->cs1_bnds, regs->cs[i].bnds); + out_be32(&ddr->cs1_config, regs->cs[i].config); + + } else if (i == 2) { + out_be32(&ddr->cs2_bnds, regs->cs[i].bnds); + out_be32(&ddr->cs2_config, regs->cs[i].config); + + } else if (i == 3) { + out_be32(&ddr->cs3_bnds, regs->cs[i].bnds); + out_be32(&ddr->cs3_config, regs->cs[i].config); + } + } + + out_be32(&ddr->timing_cfg_3, regs->timing_cfg_3); + out_be32(&ddr->timing_cfg_0, regs->timing_cfg_0); + out_be32(&ddr->timing_cfg_1, regs->timing_cfg_1); + out_be32(&ddr->timing_cfg_2, regs->timing_cfg_2); + out_be32(&ddr->sdram_cfg_2, regs->ddr_sdram_cfg_2); + out_be32(&ddr->sdram_mode_1, regs->ddr_sdram_mode); + out_be32(&ddr->sdram_mode_2, regs->ddr_sdram_mode_2); + out_be32(&ddr->sdram_mode_cntl, regs->ddr_sdram_md_cntl); + out_be32(&ddr->sdram_interval, regs->ddr_sdram_interval); + out_be32(&ddr->sdram_data_init, regs->ddr_data_init); + out_be32(&ddr->sdram_clk_cntl, regs->ddr_sdram_clk_cntl); + out_be32(&ddr->init_addr, regs->ddr_init_addr); + out_be32(&ddr->init_ext_addr, regs->ddr_init_ext_addr); + + debug("before go\n"); + + /* + * 200 painful micro-seconds must elapse between + * the DDR clock setup and the DDR config enable. + */ + udelay(200); + asm volatile("sync;isync"); + + out_be32(&ddr->sdram_cfg_1, regs->ddr_sdram_cfg); + + /* + * Poll DDR_SDRAM_CFG_2[D_INIT] bit until auto-data init is done + */ + while (in_be32(&ddr->sdram_cfg_2) & 0x10) { + udelay(10000); /* throttle polling rate */ + } +} |