board/gdsys/p1022/ddr.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright 2010 Freescale Semiconductor, Inc.
   4  * Authors: Srikanth Srinivasan <srikanth.srinivasan@freescale.com>
   5  *          Timur Tabi <timur@freescale.com>
   6  */
   7
   8 #include <common.h>
   9 #include <i2c.h>
  10
  11 #include <fsl_ddr_sdram.h>
  12 #include <fsl_ddr_dimm_params.h>
  13
  14 void fsl_ddr_board_options(memctl_options_t *popts, dimm_params_t *pdimm,
  15                            unsigned int ctrl_num)
  16 {
  17         unsigned int i;
  18
  19         if (ctrl_num) {
  20                 printf("Wrong parameter for controller number %d", ctrl_num);
  21                 return;
  22         }
  23         if (!pdimm->n_ranks)
  24                 return;
  25
  26         /* set odt_rd_cfg and odt_wr_cfg. */
  27         for (i = 0; i < CONFIG_CHIP_SELECTS_PER_CTRL; i++) {
  28                 popts->cs_local_opts[i].odt_rd_cfg = 0;
  29                 popts->cs_local_opts[i].odt_wr_cfg = 1;
  30         }
  31
  32         popts->clk_adjust = 5;
  33         popts->cpo_override = 0x1f;
  34         popts->write_data_delay = 2;
  35         popts->half_strength_driver_enable = 1;
  36
  37         /* Per AN4039, enable ZQ calibration. */
  38         popts->zq_en = 1;
  39 }
  40
  41 #ifdef CONFIG_SPD_EEPROM
  42 /*
  43  * we only have a "fake" SPD-EEPROM here, which has 16 bit addresses
  44  */
  45 void get_spd(generic_spd_eeprom_t *spd, u8 i2c_address)
  46 {
  47         int ret = i2c_read(i2c_address, 0, 2, (uchar *)spd,
  48                                 sizeof(generic_spd_eeprom_t));
  49
  50         if (ret) {
  51                 if (i2c_address ==
  52 #ifdef SPD_EEPROM_ADDRESS
  53                                 SPD_EEPROM_ADDRESS
  54 #elif defined(SPD_EEPROM_ADDRESS1)
  55                                 SPD_EEPROM_ADDRESS1
  56 #endif
  57                                 ) {
  58                         printf("DDR: failed to read SPD from address %u\n",
  59                                i2c_address);
  60                 } else {
  61                         debug("DDR: failed to read SPD from address %u\n",
  62                               i2c_address);
  63                 }
  64                 memset(spd, 0, sizeof(generic_spd_eeprom_t));
  65         }
  66 }
  67 #endif