board/freescale/p1_twr/ddr.c

   1 /*
   2  * Copyright 2013 Freescale Semiconductor, Inc.
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public License
   6  * Version 2 as published by the Free Software Foundation.
   7  */
   8
   9 #include <common.h>
  10 #include <asm/mmu.h>
  11 #include <asm/immap_85xx.h>
  12 #include <asm/processor.h>
  13 #include <asm/fsl_ddr_sdram.h>
  14 #include <asm/fsl_ddr_dimm_params.h>
  15 #include <asm/io.h>
  16 #include <asm/fsl_law.h>
  17
  18 /* Fixed sdram init -- doesn't use serial presence detect. */
  19 phys_size_t fixed_sdram(void)
  20 {
  21         sys_info_t sysinfo;
  22         char buf[32];
  23         size_t ddr_size;
  24         fsl_ddr_cfg_regs_t ddr_cfg_regs = {
  25                 .cs[0].bnds = CONFIG_SYS_DDR_CS0_BNDS,
  26                 .cs[0].config = CONFIG_SYS_DDR_CS0_CONFIG,
  27                 .cs[0].config_2 = CONFIG_SYS_DDR_CS0_CONFIG_2,
  28 #if CONFIG_CHIP_SELECTS_PER_CTRL > 1
  29                 .cs[1].bnds = CONFIG_SYS_DDR_CS1_BNDS,
  30                 .cs[1].config = CONFIG_SYS_DDR_CS1_CONFIG,
  31                 .cs[1].config_2 = CONFIG_SYS_DDR_CS1_CONFIG_2,
  32 #endif
  33                 .timing_cfg_3 = CONFIG_SYS_DDR_TIMING_3,
  34                 .timing_cfg_0 = CONFIG_SYS_DDR_TIMING_0,
  35                 .timing_cfg_1 = CONFIG_SYS_DDR_TIMING_1,
  36                 .timing_cfg_2 = CONFIG_SYS_DDR_TIMING_2,
  37                 .ddr_sdram_cfg = CONFIG_SYS_DDR_CONTROL,
  38                 .ddr_sdram_cfg_2 = CONFIG_SYS_DDR_CONTROL_2,
  39                 .ddr_sdram_mode = CONFIG_SYS_DDR_MODE_1,
  40                 .ddr_sdram_mode_2 = CONFIG_SYS_DDR_MODE_2,
  41                 .ddr_sdram_md_cntl = CONFIG_SYS_DDR_MODE_CONTROL,
  42                 .ddr_sdram_interval = CONFIG_SYS_DDR_INTERVAL,
  43                 .ddr_data_init = CONFIG_SYS_DDR_DATA_INIT,
  44                 .ddr_sdram_clk_cntl = CONFIG_SYS_DDR_CLK_CTRL,
  45                 .ddr_init_addr = CONFIG_SYS_DDR_INIT_ADDR,
  46                 .ddr_init_ext_addr = CONFIG_SYS_DDR_INIT_EXT_ADDR,
  47                 .timing_cfg_4 = CONFIG_SYS_DDR_TIMING_4,
  48                 .timing_cfg_5 = CONFIG_SYS_DDR_TIMING_5,
  49                 .ddr_zq_cntl = CONFIG_SYS_DDR_ZQ_CONTROL,
  50                 .ddr_wrlvl_cntl = CONFIG_SYS_DDR_WRLVL_CONTROL,
  51                 .ddr_sr_cntr = CONFIG_SYS_DDR_SR_CNTR,
  52                 .ddr_sdram_rcw_1 = CONFIG_SYS_DDR_RCW_1,
  53                 .ddr_sdram_rcw_2 = CONFIG_SYS_DDR_RCW_2
  54         };
  55
  56         get_sys_info(&sysinfo);
  57         printf("Configuring DDR for %s MT/s data rate\n",
  58                         strmhz(buf, sysinfo.freqDDRBus));
  59
  60         ddr_size = CONFIG_SYS_SDRAM_SIZE * 1024 * 1024;
  61
  62         fsl_ddr_set_memctl_regs(&ddr_cfg_regs, 0, 0);
  63
  64         if (set_ddr_laws(CONFIG_SYS_DDR_SDRAM_BASE,
  65                                 ddr_size, LAW_TRGT_IF_DDR_1) < 0) {
  66                 printf("ERROR setting Local Access Windows for DDR\n");
  67                 return 0;
  68         };
  69
  70         return ddr_size;
  71 }