diff options
Diffstat (limited to 'roms/u-boot/board/freescale/ls2080ardb/ddr.c')
| -rw-r--r-- | roms/u-boot/board/freescale/ls2080ardb/ddr.c | 188 |
1 files changed, 188 insertions, 0 deletions
diff --git a/roms/u-boot/board/freescale/ls2080ardb/ddr.c b/roms/u-boot/board/freescale/ls2080ardb/ddr.c new file mode 100644 index 000000000..07fa84733 --- /dev/null +++ b/roms/u-boot/board/freescale/ls2080ardb/ddr.c @@ -0,0 +1,188 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright 2015 Freescale Semiconductor, Inc. + */ + +#include <common.h> +#include <fsl_ddr_sdram.h> +#include <fsl_ddr_dimm_params.h> +#include <log.h> +#include <asm/arch/soc.h> +#include <asm/arch/clock.h> +#include <asm/global_data.h> +#include "ddr.h" + +DECLARE_GLOBAL_DATA_PTR; + +void fsl_ddr_board_options(memctl_options_t *popts, + dimm_params_t *pdimm, + unsigned int ctrl_num) +{ +#ifdef CONFIG_SYS_FSL_HAS_DP_DDR + u8 dq_mapping_0, dq_mapping_2, dq_mapping_3; +#endif + const struct board_specific_parameters *pbsp, *pbsp_highest = NULL; + ulong ddr_freq; + int slot; + + if (ctrl_num > 2) { + printf("Not supported controller number %d\n", ctrl_num); + return; + } + + for (slot = 0; slot < CONFIG_DIMM_SLOTS_PER_CTLR; slot++) { + if (pdimm[slot].n_ranks) + break; + } + + if (slot >= CONFIG_DIMM_SLOTS_PER_CTLR) + return; + + /* + * we use identical timing for all slots. If needed, change the code + * to pbsp = rdimms[ctrl_num] or pbsp = udimms[ctrl_num]; + */ + if (popts->registered_dimm_en) + pbsp = rdimms[ctrl_num]; + else + pbsp = udimms[ctrl_num]; + + + /* Get clk_adjust, wrlvl_start, wrlvl_ctl, according to the board ddr + * freqency and n_banks specified in board_specific_parameters table. + */ + ddr_freq = get_ddr_freq(ctrl_num) / 1000000; + while (pbsp->datarate_mhz_high) { + if (pbsp->n_ranks == pdimm[slot].n_ranks && + (pdimm[slot].rank_density >> 30) >= pbsp->rank_gb) { + if (ddr_freq <= pbsp->datarate_mhz_high) { + popts->clk_adjust = pbsp->clk_adjust; + popts->wrlvl_start = pbsp->wrlvl_start; + popts->wrlvl_ctl_2 = pbsp->wrlvl_ctl_2; + popts->wrlvl_ctl_3 = pbsp->wrlvl_ctl_3; + goto found; + } + pbsp_highest = pbsp; + } + pbsp++; + } + + if (pbsp_highest) { + printf("Error: board specific timing not found for data rate %lu MT/s\n" + "Trying to use the highest speed (%u) parameters\n", + ddr_freq, pbsp_highest->datarate_mhz_high); + popts->clk_adjust = pbsp_highest->clk_adjust; + popts->wrlvl_start = pbsp_highest->wrlvl_start; + popts->wrlvl_ctl_2 = pbsp->wrlvl_ctl_2; + popts->wrlvl_ctl_3 = pbsp->wrlvl_ctl_3; + } else { + panic("DIMM is not supported by this board"); + } +found: + debug("Found timing match: n_ranks %d, data rate %d, rank_gb %d\n" + "\tclk_adjust %d, wrlvl_start %d, wrlvl_ctrl_2 0x%x, wrlvl_ctrl_3 0x%x\n", + pbsp->n_ranks, pbsp->datarate_mhz_high, pbsp->rank_gb, + pbsp->clk_adjust, pbsp->wrlvl_start, pbsp->wrlvl_ctl_2, + pbsp->wrlvl_ctl_3); +#ifdef CONFIG_SYS_FSL_HAS_DP_DDR + if (ctrl_num == CONFIG_DP_DDR_CTRL) { + if (popts->registered_dimm_en) + printf("WARN: RDIMM not supported.\n"); + /* force DDR bus width to 32 bits */ + popts->data_bus_width = 1; + popts->otf_burst_chop_en = 0; + popts->burst_length = DDR_BL8; + popts->bstopre = 0; /* enable auto precharge */ + /* + * Layout optimization results byte mapping + * Byte 0 -> Byte ECC + * Byte 1 -> Byte 3 + * Byte 2 -> Byte 2 + * Byte 3 -> Byte 1 + * Byte ECC -> Byte 0 + */ + dq_mapping_0 = pdimm[slot].dq_mapping[0]; + dq_mapping_2 = pdimm[slot].dq_mapping[2]; + dq_mapping_3 = pdimm[slot].dq_mapping[3]; + pdimm[slot].dq_mapping[0] = pdimm[slot].dq_mapping[8]; + pdimm[slot].dq_mapping[1] = pdimm[slot].dq_mapping[9]; + pdimm[slot].dq_mapping[2] = pdimm[slot].dq_mapping[6]; + pdimm[slot].dq_mapping[3] = pdimm[slot].dq_mapping[7]; + pdimm[slot].dq_mapping[6] = dq_mapping_2; + pdimm[slot].dq_mapping[7] = dq_mapping_3; + pdimm[slot].dq_mapping[8] = dq_mapping_0; + pdimm[slot].dq_mapping[9] = 0; + pdimm[slot].dq_mapping[10] = 0; + pdimm[slot].dq_mapping[11] = 0; + pdimm[slot].dq_mapping[12] = 0; + pdimm[slot].dq_mapping[13] = 0; + pdimm[slot].dq_mapping[14] = 0; + pdimm[slot].dq_mapping[15] = 0; + pdimm[slot].dq_mapping[16] = 0; + pdimm[slot].dq_mapping[17] = 0; + } +#endif + /* To work at higher than 1333MT/s */ + popts->half_strength_driver_enable = 0; + /* + * Write leveling override + */ + popts->wrlvl_override = 1; + popts->wrlvl_sample = 0x0; /* 32 clocks */ + + /* + * Rtt and Rtt_WR override + */ + popts->rtt_override = 0; + + /* Enable ZQ calibration */ + popts->zq_en = 1; + + /* optimize cpo for erratum A-009942 */ + popts->cpo_sample = 0x6e; + + if (ddr_freq < 2350) { + if (pdimm[0].n_ranks == 2 && pdimm[1].n_ranks == 2) { + /* four chip-selects */ + popts->ddr_cdr1 = DDR_CDR1_DHC_EN | + DDR_CDR1_ODT(DDR_CDR_ODT_80ohm); + popts->ddr_cdr2 = DDR_CDR2_ODT(DDR_CDR_ODT_80ohm); + popts->twot_en = 1; /* enable 2T timing */ + } else { + popts->ddr_cdr1 = DDR_CDR1_DHC_EN | + DDR_CDR1_ODT(DDR_CDR_ODT_60ohm); + popts->ddr_cdr2 = DDR_CDR2_ODT(DDR_CDR_ODT_60ohm) | + DDR_CDR2_VREF_RANGE_2; + } + } else { + popts->ddr_cdr1 = DDR_CDR1_DHC_EN | + DDR_CDR1_ODT(DDR_CDR_ODT_100ohm); + popts->ddr_cdr2 = DDR_CDR2_ODT(DDR_CDR_ODT_100ohm) | + DDR_CDR2_VREF_RANGE_2; + } +} + +#ifdef CONFIG_TFABOOT +int fsl_initdram(void) +{ + gd->ram_size = tfa_get_dram_size(); + + if (!gd->ram_size) + gd->ram_size = fsl_ddr_sdram_size(); + + return 0; +} +#else +int fsl_initdram(void) +{ +#if defined(CONFIG_SPL) && !defined(CONFIG_SPL_BUILD) + gd->ram_size = fsl_ddr_sdram_size(); +#else + puts("Initializing DDR....using SPD\n"); + + gd->ram_size = fsl_ddr_sdram(); +#endif + + return 0; +} +#endif /* CONFIG_TFABOOT */ |