LXR uboot/board/keymile/kmp204x/ddr.c

   1/*
   2 * (C) Copyright 2013 Keymile AG
   3 * Valentin Longchamp <valentin.longchamp@keymile.com>
   4 *
   5 * Copyright 2009-2011 Freescale Semiconductor, Inc.
   6 *
   7 * SPDX-License-Identifier:     GPL-2.0+
   8  */
   9
  10#include <common.h>
  11#include <i2c.h>
  12#include <hwconfig.h>
  13#include <asm/mmu.h>
  14#include <fsl_ddr_sdram.h>
  15#include <fsl_ddr_dimm_params.h>
  16
  17void fsl_ddr_board_options(memctl_options_t *popts,
  18                                dimm_params_t *pdimm,
  19                                unsigned int ctrl_num)
  20{
  21        if (ctrl_num) {
  22                printf("Wrong parameter for controller number %d", ctrl_num);
  23                return;
  24        }
  25
  26        /* automatic calibration for nb of cycles between read and DQS pre */
  27        popts->cpo_override = 0xFF;
  28
  29        /* 1/2 clk delay between wr command and data strobe */
  30        popts->write_data_delay = 4;
  31        /* clk lauched 1/2 applied cylcle after address command */
  32        popts->clk_adjust = 4;
  33        /* 1T timing: command/address held for only 1 cycle */
  34        popts->twot_en = 0;
  35
  36        /* we have only one module, half str should be OK */
  37        popts->half_strength_driver_enable = 1;
  38
  39        /* wrlvl values overriden as recommended by ddr init func */
  40        popts->wrlvl_override = 1;
  41        popts->wrlvl_sample = 0xf;
  42        popts->wrlvl_start = 0x6;
  43
  44        /* Enable ZQ calibration */
  45        popts->zq_en = 1;
  46
  47        /* DHC_EN =1, ODT = 75 Ohm */
  48        popts->ddr_cdr1 = DDR_CDR1_DHC_EN | DDR_CDR_ODT_75ohm;
  49}
  50
  51phys_size_t initdram(int board_type)
  52{
  53        phys_size_t dram_size = 0;
  54
  55        puts("Initializing with SPD\n");
  56
  57        dram_size = fsl_ddr_sdram();
  58
  59        dram_size = setup_ddr_tlbs(dram_size / 0x100000);
  60        dram_size *= 0x100000;
  61
  62        debug("    DDR: ");
  63        return dram_size;
  64}
  65