drivers/ddr/fsl/mpc85xx_ddr_gen1.c

   1 /*
   2  * Copyright 2008 Freescale Semiconductor, Inc.
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0
   5  */
   6
   7 #include <common.h>
   8 #include <asm/io.h>
   9 #include <fsl_ddr_sdram.h>
  10
  11 #if (CONFIG_CHIP_SELECTS_PER_CTRL > 4)
  12 #error Invalid setting for CONFIG_CHIP_SELECTS_PER_CTRL
  13 #endif
  14
  15 void fsl_ddr_set_memctl_regs(const fsl_ddr_cfg_regs_t *regs,
  16                              unsigned int ctrl_num, int step)
  17 {
  18         unsigned int i;
  19         struct ccsr_ddr __iomem *ddr =
  20                 (struct ccsr_ddr __iomem *)CONFIG_SYS_FSL_DDR_ADDR;
  21
  22         if (ctrl_num != 0) {
  23                 printf("%s unexpected ctrl_num = %u\n", __FUNCTION__, ctrl_num);
  24                 return;
  25         }
  26
  27         for (i = 0; i < CONFIG_CHIP_SELECTS_PER_CTRL; i++) {
  28                 if (i == 0) {
  29                         out_be32(&ddr->cs0_bnds, regs->cs[i].bnds);
  30                         out_be32(&ddr->cs0_config, regs->cs[i].config);
  31
  32                 } else if (i == 1) {
  33                         out_be32(&ddr->cs1_bnds, regs->cs[i].bnds);
  34                         out_be32(&ddr->cs1_config, regs->cs[i].config);
  35
  36                 } else if (i == 2) {
  37                         out_be32(&ddr->cs2_bnds, regs->cs[i].bnds);
  38                         out_be32(&ddr->cs2_config, regs->cs[i].config);
  39
  40                 } else if (i == 3) {
  41                         out_be32(&ddr->cs3_bnds, regs->cs[i].bnds);
  42                         out_be32(&ddr->cs3_config, regs->cs[i].config);
  43                 }
  44         }
  45
  46         out_be32(&ddr->timing_cfg_1, regs->timing_cfg_1);
  47         out_be32(&ddr->timing_cfg_2, regs->timing_cfg_2);
  48         out_be32(&ddr->sdram_mode, regs->ddr_sdram_mode);
  49         out_be32(&ddr->sdram_interval, regs->ddr_sdram_interval);
  50 #if defined(CONFIG_MPC8555) || defined(CONFIG_MPC8541)
  51         out_be32(&ddr->sdram_clk_cntl, regs->ddr_sdram_clk_cntl);
  52 #endif
  53
  54         /*
  55          * 200 painful micro-seconds must elapse between
  56          * the DDR clock setup and the DDR config enable.
  57          */
  58         udelay(200);
  59         asm volatile("sync;isync");
  60
  61         out_be32(&ddr->sdram_cfg, regs->ddr_sdram_cfg);
  62
  63         asm("sync;isync;msync");
  64         udelay(500);
  65 }
  66
  67 #if defined(CONFIG_DDR_ECC) && !defined(CONFIG_ECC_INIT_VIA_DDRCONTROLLER)
  68 /*
  69  * Initialize all of memory for ECC, then enable errors.
  70  */
  71
  72 void
  73 ddr_enable_ecc(unsigned int dram_size)
  74 {
  75         struct ccsr_ddr __iomem *ddr =
  76                 (struct ccsr_ddr __iomem *)(CONFIG_SYS_FSL_DDR_ADDR);
  77
  78         dma_meminit(CONFIG_MEM_INIT_VALUE, dram_size);
  79
  80         /*
  81          * Enable errors for ECC.
  82          */
  83         debug("DMA DDR: err_disable = 0x%08x\n", ddr->err_disable);
  84         ddr->err_disable = 0x00000000;
  85         asm("sync;isync;msync");
  86         debug("DMA DDR: err_disable = 0x%08x\n", ddr->err_disable);
  87 }
  88
  89 #endif  /* CONFIG_DDR_ECC  && ! CONFIG_ECC_INIT_VIA_DDRCONTROLLER */