diff options
Diffstat (limited to 'arch/powerpc/cpu/mpc85xx/ddr-gen3.c')
| -rw-r--r-- | arch/powerpc/cpu/mpc85xx/ddr-gen3.c | 116 |
1 files changed, 116 insertions, 0 deletions
diff --git a/arch/powerpc/cpu/mpc85xx/ddr-gen3.c b/arch/powerpc/cpu/mpc85xx/ddr-gen3.c new file mode 100644 index 0000000..0691ca4 --- /dev/null +++ b/arch/powerpc/cpu/mpc85xx/ddr-gen3.c @@ -0,0 +1,116 @@ +/* + * 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; + u32 temp_sdram_cfg; + + switch (ctrl_num) { + case 0: + ddr = (void *)CONFIG_SYS_MPC85xx_DDR_ADDR; + break; + case 1: + ddr = (void *)CONFIG_SYS_MPC85xx_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_config, regs->cs[i].config); + out_be32(&ddr->cs0_config_2, regs->cs[i].config_2); + + } else if (i == 1) { + out_be32(&ddr->cs1_bnds, regs->cs[i].bnds); + out_be32(&ddr->cs1_config, regs->cs[i].config); + out_be32(&ddr->cs1_config_2, regs->cs[i].config_2); + + } else if (i == 2) { + out_be32(&ddr->cs2_bnds, regs->cs[i].bnds); + out_be32(&ddr->cs2_config, regs->cs[i].config); + out_be32(&ddr->cs2_config_2, regs->cs[i].config_2); + + } 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->cs3_config_2, regs->cs[i].config_2); + } + } + + 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, regs->ddr_sdram_mode); + out_be32(&ddr->sdram_mode_2, regs->ddr_sdram_mode_2); + out_be32(&ddr->sdram_md_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); + + out_be32(&ddr->timing_cfg_4, regs->timing_cfg_4); + out_be32(&ddr->timing_cfg_5, regs->timing_cfg_5); + out_be32(&ddr->ddr_zq_cntl, regs->ddr_zq_cntl); + out_be32(&ddr->ddr_wrlvl_cntl, regs->ddr_wrlvl_cntl); + out_be32(&ddr->ddr_sr_cntr, regs->ddr_sr_cntr); + out_be32(&ddr->ddr_sdram_rcw_1, regs->ddr_sdram_rcw_1); + out_be32(&ddr->ddr_sdram_rcw_2, regs->ddr_sdram_rcw_2); + + /* Set, but do not enable the memory */ + temp_sdram_cfg = regs->ddr_sdram_cfg; + temp_sdram_cfg &= ~(SDRAM_CFG_MEM_EN); + out_be32(&ddr->sdram_cfg, temp_sdram_cfg); + /* + * For 8572 DDR1 erratum - DDR controller may enter illegal state + * when operatiing in 32-bit bus mode with 4-beat bursts, + * This erratum does not affect DDR3 mode, only for DDR2 mode. + */ +#ifdef CONFIG_MPC8572 + if ((((in_be32(&ddr->sdram_cfg) >> 24) & 0x7) == SDRAM_TYPE_DDR2) + && in_be32(&ddr->sdram_cfg) & 0x80000) { + /* set DEBUG_1[31] */ + u32 temp = in_be32(&ddr->debug_1); + out_be32(&ddr->debug_1, temp | 1); + } +#endif + + /* + * 500 painful micro-seconds must elapse between + * the DDR clock setup and the DDR config enable. + * DDR2 need 200 us, and DDR3 need 500 us from spec, + * we choose the max, that is 500 us for all of case. + */ + udelay(500); + asm volatile("sync;isync"); + + /* Let the controller go */ + temp_sdram_cfg = in_be32(&ddr->sdram_cfg); + out_be32(&ddr->sdram_cfg, temp_sdram_cfg | SDRAM_CFG_MEM_EN); + + /* 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 */ + } +} |