arch/arm/mach-uniphier/dram/umc-ph1-ld4.c

   1 /*
   2  * Copyright (C) 2011-2015 Masahiro Yamada <yamada.masahiro@socionext.com>
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0+
   5  */
   6
   7 #include <common.h>
   8 #include <linux/err.h>
   9 #include <linux/io.h>
  10 #include <linux/sizes.h>
  11
  12 #include "../init.h"
  13 #include "ddrphy-regs.h"
  14 #include "umc-regs.h"
  15
  16 #define DRAM_CH_NR      2
  17
  18 enum dram_freq {
  19         DRAM_FREQ_1333M,
  20         DRAM_FREQ_1600M,
  21         DRAM_FREQ_NR,
  22 };
  23
  24 enum dram_size {
  25         DRAM_SZ_128M,
  26         DRAM_SZ_256M,
  27         DRAM_SZ_NR,
  28 };
  29
  30 static u32 umc_cmdctla_plus[DRAM_FREQ_NR] = {0x45990b11, 0x36bb0f17};
  31 static u32 umc_cmdctlb_plus[DRAM_FREQ_NR] = {0x16958924, 0x18c6aa24};
  32 static u32 umc_spcctla[DRAM_FREQ_NR][DRAM_SZ_NR] = {
  33         {0x00240512, 0x00350512},
  34         {0x002b0617, 0x003f0617},
  35 };
  36 static u32 umc_spcctlb[DRAM_FREQ_NR] = {0x00ff0006, 0x00ff0008};
  37 static u32 umc_rdatactl[DRAM_FREQ_NR] = {0x000a00ac, 0x000c00ae};
  38
  39 static int umc_get_rank(int ch)
  40 {
  41         return ch;      /* ch0: rank0, ch1: rank1 for this SoC */
  42 }
  43
  44 static void umc_start_ssif(void __iomem *ssif_base)
  45 {
  46         writel(0x00000000, ssif_base + 0x0000b004);
  47         writel(0xffffffff, ssif_base + 0x0000c004);
  48         writel(0x000fffcf, ssif_base + 0x0000c008);
  49         writel(0x00000001, ssif_base + 0x0000b000);
  50         writel(0x00000001, ssif_base + 0x0000c000);
  51         writel(0x03010101, ssif_base + UMC_MDMCHSEL);
  52         writel(0x03010100, ssif_base + UMC_DMDCHSEL);
  53
  54         writel(0x00000000, ssif_base + UMC_CLKEN_SSIF_FETCH);
  55         writel(0x00000000, ssif_base + UMC_CLKEN_SSIF_COMQUE0);
  56         writel(0x00000000, ssif_base + UMC_CLKEN_SSIF_COMWC0);
  57         writel(0x00000000, ssif_base + UMC_CLKEN_SSIF_COMRC0);
  58         writel(0x00000000, ssif_base + UMC_CLKEN_SSIF_COMQUE1);
  59         writel(0x00000000, ssif_base + UMC_CLKEN_SSIF_COMWC1);
  60         writel(0x00000000, ssif_base + UMC_CLKEN_SSIF_COMRC1);
  61         writel(0x00000000, ssif_base + UMC_CLKEN_SSIF_WC);
  62         writel(0x00000000, ssif_base + UMC_CLKEN_SSIF_RC);
  63         writel(0x00000000, ssif_base + UMC_CLKEN_SSIF_DST);
  64
  65         writel(0x00000001, ssif_base + UMC_CPURST);
  66         writel(0x00000001, ssif_base + UMC_IDSRST);
  67         writel(0x00000001, ssif_base + UMC_IXMRST);
  68         writel(0x00000001, ssif_base + UMC_MDMRST);
  69         writel(0x00000001, ssif_base + UMC_MDDRST);
  70         writel(0x00000001, ssif_base + UMC_SIORST);
  71         writel(0x00000001, ssif_base + UMC_VIORST);
  72         writel(0x00000001, ssif_base + UMC_FRCRST);
  73         writel(0x00000001, ssif_base + UMC_RGLRST);
  74         writel(0x00000001, ssif_base + UMC_AIORST);
  75         writel(0x00000001, ssif_base + UMC_DMDRST);
  76 }
  77
  78 static int umc_dramcont_init(void __iomem *dramcont, void __iomem *ca_base,
  79                              int size, int freq, bool ddr3plus)
  80 {
  81         enum dram_freq freq_e;
  82         enum dram_size size_e;
  83
  84         if (!ddr3plus) {
  85                 pr_err("DDR3 standard is not supported\n");
  86                 return -EINVAL;
  87         }
  88
  89         switch (freq) {
  90         case 1333:
  91                 freq_e = DRAM_FREQ_1333M;
  92                 break;
  93         case 1600:
  94                 freq_e = DRAM_FREQ_1600M;
  95                 break;
  96         default:
  97                 pr_err("unsupported DRAM frequency %d MHz\n", freq);
  98                 return -EINVAL;
  99         }
 100
 101         switch (size) {
 102         case 0:
 103                 return 0;
 104         case 1:
 105                 size_e = DRAM_SZ_128M;
 106                 break;
 107         case 2:
 108                 size_e = DRAM_SZ_256M;
 109                 break;
 110         default:
 111                 pr_err("unsupported DRAM size\n");
 112                 return -EINVAL;
 113         }
 114
 115         writel(umc_cmdctla_plus[freq_e], dramcont + UMC_CMDCTLA);
 116         writel(umc_cmdctlb_plus[freq_e], dramcont + UMC_CMDCTLB);
 117         writel(umc_spcctla[freq_e][size_e], dramcont + UMC_SPCCTLA);
 118         writel(umc_spcctlb[freq_e], dramcont + UMC_SPCCTLB);
 119         writel(umc_rdatactl[freq_e], dramcont + UMC_RDATACTL_D0);
 120         writel(0x04060806, dramcont + UMC_WDATACTL_D0);
 121         writel(0x04a02000, dramcont + UMC_DATASET);
 122         writel(0x00000000, ca_base + 0x2300);
 123         writel(0x00400020, dramcont + UMC_DCCGCTL);
 124         writel(0x00000003, dramcont + 0x7000);
 125         writel(0x0000000f, dramcont + 0x8000);
 126         writel(0x000000c3, dramcont + 0x8004);
 127         writel(0x00000071, dramcont + 0x8008);
 128         writel(0x0000003b, dramcont + UMC_DICGCTLA);
 129         writel(0x020a0808, dramcont + UMC_DICGCTLB);
 130         writel(0x00000004, dramcont + UMC_FLOWCTLG);
 131         writel(0x80000201, ca_base + 0xc20);
 132         writel(0x0801e01e, dramcont + UMC_FLOWCTLA);
 133         writel(0x00200000, dramcont + UMC_FLOWCTLB);
 134         writel(0x00004444, dramcont + UMC_FLOWCTLC);
 135         writel(0x200a0a00, dramcont + UMC_SPCSETB);
 136         writel(0x00000000, dramcont + UMC_SPCSETD);
 137         writel(0x00000520, dramcont + UMC_DFICUPDCTLA);
 138
 139         return 0;
 140 }
 141
 142 static int umc_ch_init(void __iomem *dc_base, void __iomem *ca_base,
 143                        int freq, int size, bool ddr3plus, int ch)
 144 {
 145         void __iomem *phy_base = dc_base + 0x00001000;
 146         int ret;
 147
 148         umc_dram_init_start(dc_base);
 149         umc_dram_init_poll(dc_base);
 150
 151         writel(0x00000101, dc_base + UMC_DIOCTLA);
 152
 153         ret = ph1_ld4_ddrphy_init(phy_base, freq, ddr3plus);
 154         if (ret)
 155                 return ret;
 156
 157         ddrphy_prepare_training(phy_base, umc_get_rank(ch));
 158         ret = ddrphy_training(phy_base);
 159         if (ret)
 160                 return ret;
 161
 162         return umc_dramcont_init(dc_base, ca_base, size, freq, ddr3plus);
 163 }
 164
 165 int ph1_ld4_umc_init(const struct uniphier_board_data *bd)
 166 {
 167         void __iomem *umc_base = (void __iomem *)0x5b800000;
 168         void __iomem *ca_base = umc_base + 0x00001000;
 169         void __iomem *dc_base = umc_base + 0x00400000;
 170         void __iomem *ssif_base = umc_base;
 171         int ch, ret;
 172
 173         for (ch = 0; ch < DRAM_CH_NR; ch++) {
 174                 ret = umc_ch_init(dc_base, ca_base, bd->dram_freq,
 175                                   bd->dram_ch[ch].size / SZ_128M,
 176                                   bd->dram_ddr3plus, ch);
 177                 if (ret) {
 178                         pr_err("failed to initialize UMC ch%d\n", ch);
 179                         return ret;
 180                 }
 181
 182                 ca_base += 0x00001000;
 183                 dc_base += 0x00200000;
 184         }
 185
 186         umc_start_ssif(ssif_base);
 187
 188         return 0;
 189 }