git.sur5r.net Git - u-boot/blob - board/gdsys/p1022/ddr.c

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