mirror of
https://github.com/AsahiLinux/u-boot
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83d290c56f
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
125 lines
3.1 KiB
C
125 lines
3.1 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright 2017 NXP
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*/
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#include <common.h>
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#include <fsl_ddr_sdram.h>
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#include <fsl_ddr_dimm_params.h>
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#include <asm/arch/soc.h>
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#include <asm/arch/clock.h>
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#include "ddr.h"
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DECLARE_GLOBAL_DATA_PTR;
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#if defined(CONFIG_VID) && (!defined(CONFIG_SPL) || defined(CONFIG_SPL_BUILD))
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static void fsl_ddr_setup_0v9_volt(memctl_options_t *popts)
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{
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int vdd;
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vdd = get_core_volt_from_fuse();
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/* Nothing to do for silicons doesn't support VID */
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if (vdd < 0)
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return;
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if (vdd == 900) {
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popts->ddr_cdr1 |= DDR_CDR1_V0PT9_EN;
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debug("VID: configure DDR to support 900 mV\n");
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}
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}
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#endif
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void fsl_ddr_board_options(memctl_options_t *popts,
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dimm_params_t *pdimm,
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unsigned int ctrl_num)
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{
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const struct board_specific_parameters *pbsp, *pbsp_highest = NULL;
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ulong ddr_freq;
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if (ctrl_num > 1) {
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printf("Not supported controller number %d\n", ctrl_num);
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return;
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}
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if (!pdimm->n_ranks)
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return;
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/*
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* we use identical timing for all slots. If needed, change the code
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* to pbsp = rdimms[ctrl_num] or pbsp = udimms[ctrl_num];
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*/
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pbsp = udimms[0];
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/* Get clk_adjust, wrlvl_start, wrlvl_ctl, according to the board ddr
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* freqency and n_banks specified in board_specific_parameters table.
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*/
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ddr_freq = get_ddr_freq(0) / 1000000;
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while (pbsp->datarate_mhz_high) {
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if (pbsp->n_ranks == pdimm->n_ranks) {
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if (ddr_freq <= pbsp->datarate_mhz_high) {
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popts->clk_adjust = pbsp->clk_adjust;
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popts->wrlvl_start = pbsp->wrlvl_start;
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popts->wrlvl_ctl_2 = pbsp->wrlvl_ctl_2;
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popts->wrlvl_ctl_3 = pbsp->wrlvl_ctl_3;
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goto found;
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}
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pbsp_highest = pbsp;
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}
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pbsp++;
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}
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if (pbsp_highest) {
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printf("Error: board specific timing not found for %lu MT/s\n",
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ddr_freq);
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printf("Trying to use the highest speed (%u) parameters\n",
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pbsp_highest->datarate_mhz_high);
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popts->clk_adjust = pbsp_highest->clk_adjust;
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popts->wrlvl_start = pbsp_highest->wrlvl_start;
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popts->wrlvl_ctl_2 = pbsp->wrlvl_ctl_2;
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popts->wrlvl_ctl_3 = pbsp->wrlvl_ctl_3;
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} else {
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panic("DIMM is not supported by this board");
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}
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found:
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debug("Found timing match: n_ranks %d, data rate %d, rank_gb %d\n"
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"\tclk_adjust %d, wrlvl_start %d, wrlvl_ctrl_2 0x%x, wrlvl_ctrl_3 0x%x\n",
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pbsp->n_ranks, pbsp->datarate_mhz_high, pbsp->rank_gb,
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pbsp->clk_adjust, pbsp->wrlvl_start, pbsp->wrlvl_ctl_2,
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pbsp->wrlvl_ctl_3);
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popts->half_strength_driver_enable = 0;
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/*
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* Write leveling override
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*/
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popts->wrlvl_override = 1;
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popts->wrlvl_sample = 0xf;
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/* Enable ZQ calibration */
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popts->zq_en = 1;
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/* Enable DDR hashing */
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popts->addr_hash = 1;
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popts->ddr_cdr1 = DDR_CDR1_DHC_EN | DDR_CDR1_ODT(DDR_CDR_ODT_60ohm);
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#if defined(CONFIG_VID) && (!defined(CONFIG_SPL) || defined(CONFIG_SPL_BUILD))
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fsl_ddr_setup_0v9_volt(popts);
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#endif
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popts->ddr_cdr2 = DDR_CDR2_ODT(DDR_CDR_ODT_60ohm) |
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DDR_CDR2_VREF_TRAIN_EN | DDR_CDR2_VREF_RANGE_2;
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}
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int fsl_initdram(void)
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{
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puts("Initializing DDR....using SPD\n");
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#if defined(CONFIG_SPL) && !defined(CONFIG_SPL_BUILD)
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gd->ram_size = fsl_ddr_sdram_size();
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#else
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gd->ram_size = fsl_ddr_sdram();
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#endif
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return 0;
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}
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