cpu/mpc85xx/ddr-gen3.c

   1 /*
   2  * Copyright 2008 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/io.h>
  11 #include <asm/fsl_ddr_sdram.h>
  12
  13 #if (CONFIG_CHIP_SELECTS_PER_CTRL > 4)
  14 #error Invalid setting for CONFIG_CHIP_SELECTS_PER_CTRL
  15 #endif
  16
  17 void fsl_ddr_set_memctl_regs(const fsl_ddr_cfg_regs_t *regs,
  18                              unsigned int ctrl_num)
  19 {
  20         unsigned int i;
  21         volatile ccsr_ddr_t *ddr;
  22
  23         switch (ctrl_num) {
  24         case 0:
  25                 ddr = (void *)CONFIG_SYS_MPC85xx_DDR_ADDR;
  26                 break;
  27         case 1:
  28                 ddr = (void *)CONFIG_SYS_MPC85xx_DDR2_ADDR;
  29                 break;
  30         default:
  31                 printf("%s unexpected ctrl_num = %u\n", __FUNCTION__, ctrl_num);
  32                 return;
  33         }
  34
  35         for (i = 0; i < CONFIG_CHIP_SELECTS_PER_CTRL; i++) {
  36                 if (i == 0) {
  37                         out_be32(&ddr->cs0_bnds, regs->cs[i].bnds);
  38                         out_be32(&ddr->cs0_config, regs->cs[i].config);
  39                         out_be32(&ddr->cs0_config_2, regs->cs[i].config_2);
  40
  41                 } else if (i == 1) {
  42                         out_be32(&ddr->cs1_bnds, regs->cs[i].bnds);
  43                         out_be32(&ddr->cs1_config, regs->cs[i].config);
  44                         out_be32(&ddr->cs1_config_2, regs->cs[i].config_2);
  45
  46                 } else if (i == 2) {
  47                         out_be32(&ddr->cs2_bnds, regs->cs[i].bnds);
  48                         out_be32(&ddr->cs2_config, regs->cs[i].config);
  49                         out_be32(&ddr->cs2_config_2, regs->cs[i].config_2);
  50
  51                 } else if (i == 3) {
  52                         out_be32(&ddr->cs3_bnds, regs->cs[i].bnds);
  53                         out_be32(&ddr->cs3_config, regs->cs[i].config);
  54                         out_be32(&ddr->cs3_config_2, regs->cs[i].config_2);
  55                 }
  56         }
  57
  58         out_be32(&ddr->timing_cfg_3, regs->timing_cfg_3);
  59         out_be32(&ddr->timing_cfg_0, regs->timing_cfg_0);
  60         out_be32(&ddr->timing_cfg_1, regs->timing_cfg_1);
  61         out_be32(&ddr->timing_cfg_2, regs->timing_cfg_2);
  62         out_be32(&ddr->sdram_cfg_2, regs->ddr_sdram_cfg_2);
  63         out_be32(&ddr->sdram_mode, regs->ddr_sdram_mode);
  64         out_be32(&ddr->sdram_mode_2, regs->ddr_sdram_mode_2);
  65         out_be32(&ddr->sdram_md_cntl, regs->ddr_sdram_md_cntl);
  66         out_be32(&ddr->sdram_interval, regs->ddr_sdram_interval);
  67         out_be32(&ddr->sdram_data_init, regs->ddr_data_init);
  68         out_be32(&ddr->sdram_clk_cntl, regs->ddr_sdram_clk_cntl);
  69         out_be32(&ddr->init_addr, regs->ddr_init_addr);
  70         out_be32(&ddr->init_ext_addr, regs->ddr_init_ext_addr);
  71
  72         out_be32(&ddr->timing_cfg_4, regs->timing_cfg_4);
  73         out_be32(&ddr->timing_cfg_5, regs->timing_cfg_5);
  74         out_be32(&ddr->ddr_zq_cntl, regs->ddr_zq_cntl);
  75         out_be32(&ddr->ddr_wrlvl_cntl, regs->ddr_wrlvl_cntl);
  76         out_be32(&ddr->ddr_pd_cntl, regs->ddr_pd_cntl);
  77         out_be32(&ddr->ddr_sr_cntr, regs->ddr_sr_cntr);
  78         out_be32(&ddr->ddr_sdram_rcw_1, regs->ddr_sdram_rcw_1);
  79         out_be32(&ddr->ddr_sdram_rcw_2, regs->ddr_sdram_rcw_2);
  80
  81         /*
  82          * 32-bit workaround for DDR2
  83          * 32_BE
  84          */
  85         if ((((in_be32(&ddr->sdram_cfg) >> 24) & 0x7) == SDRAM_TYPE_DDR2)
  86             && in_be32(&ddr->sdram_cfg_2) & 0x80000) {
  87                 /* set DEBUG_1[31] */
  88                 u32 temp = in_be32(&ddr->debug_1);
  89                 out_be32(&ddr->debug_1, temp | 1);
  90         }
  91
  92         /*
  93          * 200 painful micro-seconds must elapse between
  94          * the DDR clock setup and the DDR config enable.
  95          */
  96         udelay(200);
  97         asm volatile("sync;isync");
  98
  99         out_be32(&ddr->sdram_cfg, regs->ddr_sdram_cfg);
 100
 101         /* Poll DDR_SDRAM_CFG_2[D_INIT] bit until auto-data init is done.  */
 102         while (in_be32(&ddr->sdram_cfg_2) & 0x10) {
 103                 udelay(10000);          /* throttle polling rate */
 104         }
 105 }