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

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright (C) 2011-2014 Panasonic Corporation
   4  * Copyright (C) 2015-2016 Socionext Inc.
   5  *   Author: Masahiro Yamada <yamada.masahiro@socionext.com>
   6  */
   7
   8 #include <linux/errno.h>
   9 #include <linux/io.h>
  10 #include <linux/sizes.h>
  11 #include <asm/processor.h>
  12
  13 #include "../init.h"
  14 #include "ddrphy-init.h"
  15 #include "umc-regs.h"
  16
  17 #define DRAM_CH_NR      2
  18
  19 enum dram_freq {
  20         DRAM_FREQ_1333M,
  21         DRAM_FREQ_1600M,
  22         DRAM_FREQ_NR,
  23 };
  24
  25 enum dram_size {
  26         DRAM_SZ_128M,
  27         DRAM_SZ_256M,
  28         DRAM_SZ_NR,
  29 };
  30
  31 static u32 umc_cmdctla_plus[DRAM_FREQ_NR] = {0x45990b11, 0x36bb0f17};
  32 static u32 umc_cmdctlb_plus[DRAM_FREQ_NR] = {0x16958924, 0x18c6aa24};
  33 static u32 umc_spcctla[DRAM_FREQ_NR][DRAM_SZ_NR] = {
  34         {0x00240512, 0x00350512},
  35         {0x002b0617, 0x003f0617},
  36 };
  37 static u32 umc_spcctlb[DRAM_FREQ_NR] = {0x00ff0006, 0x00ff0008};
  38 static u32 umc_rdatactl[DRAM_FREQ_NR] = {0x000a00ac, 0x000c00ae};
  39
  40 static int umc_get_rank(int ch)
  41 {
  42         return ch;      /* ch0: rank0, ch1: rank1 for this SoC */
  43 }
  44
  45 static void umc_start_ssif(void __iomem *ssif_base)
  46 {
  47         writel(0x00000000, ssif_base + 0x0000b004);
  48         writel(0xffffffff, ssif_base + 0x0000c004);
  49         writel(0x000fffcf, ssif_base + 0x0000c008);
  50         writel(0x00000001, ssif_base + 0x0000b000);
  51         writel(0x00000001, ssif_base + 0x0000c000);
  52         writel(0x03010101, ssif_base + UMC_MDMCHSEL);
  53         writel(0x03010100, ssif_base + UMC_DMDCHSEL);
  54
  55         writel(0x00000000, ssif_base + UMC_CLKEN_SSIF_FETCH);
  56         writel(0x00000000, ssif_base + UMC_CLKEN_SSIF_COMQUE0);
  57         writel(0x00000000, ssif_base + UMC_CLKEN_SSIF_COMWC0);
  58         writel(0x00000000, ssif_base + UMC_CLKEN_SSIF_COMRC0);
  59         writel(0x00000000, ssif_base + UMC_CLKEN_SSIF_COMQUE1);
  60         writel(0x00000000, ssif_base + UMC_CLKEN_SSIF_COMWC1);
  61         writel(0x00000000, ssif_base + UMC_CLKEN_SSIF_COMRC1);
  62         writel(0x00000000, ssif_base + UMC_CLKEN_SSIF_WC);
  63         writel(0x00000000, ssif_base + UMC_CLKEN_SSIF_RC);
  64         writel(0x00000000, ssif_base + UMC_CLKEN_SSIF_DST);
  65
  66         writel(0x00000001, ssif_base + UMC_CPURST);
  67         writel(0x00000001, ssif_base + UMC_IDSRST);
  68         writel(0x00000001, ssif_base + UMC_IXMRST);
  69         writel(0x00000001, ssif_base + UMC_MDMRST);
  70         writel(0x00000001, ssif_base + UMC_MDDRST);
  71         writel(0x00000001, ssif_base + UMC_SIORST);
  72         writel(0x00000001, ssif_base + UMC_VIORST);
  73         writel(0x00000001, ssif_base + UMC_FRCRST);
  74         writel(0x00000001, ssif_base + UMC_RGLRST);
  75         writel(0x00000001, ssif_base + UMC_AIORST);
  76         writel(0x00000001, ssif_base + UMC_DMDRST);
  77 }
  78
  79 static int umc_dramcont_init(void __iomem *dc_base, void __iomem *ca_base,
  80                              int freq, unsigned long size, bool ddr3plus)
  81 {
  82         enum dram_freq freq_e;
  83         enum dram_size size_e;
  84
  85         if (!ddr3plus) {
  86                 pr_err("DDR3 standard is not supported\n");
  87                 return -EINVAL;
  88         }
  89
  90         switch (freq) {
  91         case 1333:
  92                 freq_e = DRAM_FREQ_1333M;
  93                 break;
  94         case 1600:
  95                 freq_e = DRAM_FREQ_1600M;
  96                 break;
  97         default:
  98                 pr_err("unsupported DRAM frequency %d MHz\n", freq);
  99                 return -EINVAL;
 100         }
 101
 102         switch (size) {
 103         case 0:
 104                 return 0;
 105         case SZ_128M:
 106                 size_e = DRAM_SZ_128M;
 107                 break;
 108         case SZ_256M:
 109                 size_e = DRAM_SZ_256M;
 110                 break;
 111         default:
 112                 pr_err("unsupported DRAM size 0x%08lx\n", size);
 113                 return -EINVAL;
 114         }
 115
 116         writel(umc_cmdctla_plus[freq_e], dc_base + UMC_CMDCTLA);
 117         writel(umc_cmdctlb_plus[freq_e], dc_base + UMC_CMDCTLB);
 118         writel(umc_spcctla[freq_e][size_e], dc_base + UMC_SPCCTLA);
 119         writel(umc_spcctlb[freq_e], dc_base + UMC_SPCCTLB);
 120         writel(umc_rdatactl[freq_e], dc_base + UMC_RDATACTL_D0);
 121         writel(0x04060806, dc_base + UMC_WDATACTL_D0);
 122         writel(0x04a02000, dc_base + UMC_DATASET);
 123         writel(0x00000000, ca_base + 0x2300);
 124         writel(0x00400020, dc_base + UMC_DCCGCTL);
 125         writel(0x00000003, dc_base + 0x7000);
 126         writel(0x0000000f, dc_base + 0x8000);
 127         writel(0x000000c3, dc_base + 0x8004);
 128         writel(0x00000071, dc_base + 0x8008);
 129         writel(0x0000003b, dc_base + UMC_DICGCTLA);
 130         writel(0x020a0808, dc_base + UMC_DICGCTLB);
 131         writel(0x00000004, dc_base + UMC_FLOWCTLG);
 132         writel(0x80000201, ca_base + 0xc20);
 133         writel(0x0801e01e, dc_base + UMC_FLOWCTLA);
 134         writel(0x00200000, dc_base + UMC_FLOWCTLB);
 135         writel(0x00004444, dc_base + UMC_FLOWCTLC);
 136         writel(0x200a0a00, dc_base + UMC_SPCSETB);
 137         writel(0x00000000, dc_base + UMC_SPCSETD);
 138         writel(0x00000520, dc_base + UMC_DFICUPDCTLA);
 139
 140         return 0;
 141 }
 142
 143 static int umc_ch_init(void __iomem *dc_base, void __iomem *ca_base,
 144                        int freq, unsigned long size, bool ddr3plus, int ch)
 145 {
 146         void __iomem *phy_base = dc_base + 0x00001000;
 147         int ret;
 148
 149         writel(UMC_INITSET_INIT1EN, dc_base + UMC_INITSET);
 150         while (readl(dc_base + UMC_INITSTAT) & UMC_INITSTAT_INIT1ST)
 151                 cpu_relax();
 152
 153         writel(0x00000101, dc_base + UMC_DIOCTLA);
 154
 155         ret = uniphier_ld4_ddrphy_init(phy_base, freq, ddr3plus);
 156         if (ret)
 157                 return ret;
 158
 159         ddrphy_prepare_training(phy_base, umc_get_rank(ch));
 160         ret = ddrphy_training(phy_base);
 161         if (ret)
 162                 return ret;
 163
 164         return umc_dramcont_init(dc_base, ca_base, freq, size, ddr3plus);
 165 }
 166
 167 int uniphier_ld4_umc_init(const struct uniphier_board_data *bd)
 168 {
 169         void __iomem *umc_base = (void __iomem *)0x5b800000;
 170         void __iomem *ca_base = umc_base + 0x00001000;
 171         void __iomem *dc_base = umc_base + 0x00400000;
 172         void __iomem *ssif_base = umc_base;
 173         int ch, ret;
 174
 175         for (ch = 0; ch < DRAM_CH_NR; ch++) {
 176                 ret = umc_ch_init(dc_base, ca_base, bd->dram_freq,
 177                                   bd->dram_ch[ch].size,
 178                                   !!(bd->flags & UNIPHIER_BD_DDR3PLUS), ch);
 179                 if (ret) {
 180                         pr_err("failed to initialize UMC ch%d\n", ch);
 181                         return ret;
 182                 }
 183
 184                 ca_base += 0x00001000;
 185                 dc_base += 0x00200000;
 186         }
 187
 188         umc_start_ssif(ssif_base);
 189
 190         return 0;
 191 }