arch/arm/mach-uniphier/dram/umc-pro4.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 <common.h>
   9 #include <linux/errno.h>
  10 #include <linux/io.h>
  11 #include <linux/sizes.h>
  12 #include <asm/processor.h>
  13
  14 #include "../init.h"
  15 #include "ddrphy-init.h"
  16 #include "umc-regs.h"
  17
  18 #define DRAM_CH_NR      2
  19
  20 enum dram_size {
  21         DRAM_SZ_128M,
  22         DRAM_SZ_256M,
  23         DRAM_SZ_512M,
  24         DRAM_SZ_NR,
  25 };
  26
  27 static u32 umc_spcctla[DRAM_SZ_NR] = {0x002b0617, 0x003f0617, 0x00770617};
  28
  29 static void umc_start_ssif(void __iomem *ssif_base)
  30 {
  31         writel(0x00000000, ssif_base + 0x0000b004);
  32         writel(0xffffffff, ssif_base + 0x0000c004);
  33         writel(0x000fffcf, ssif_base + 0x0000c008);
  34         writel(0x00000001, ssif_base + 0x0000b000);
  35         writel(0x00000001, ssif_base + 0x0000c000);
  36
  37         writel(0x03010100, ssif_base + UMC_HDMCHSEL);
  38         writel(0x03010101, ssif_base + UMC_MDMCHSEL);
  39         writel(0x03010100, ssif_base + UMC_DVCCHSEL);
  40         writel(0x03010100, ssif_base + UMC_DMDCHSEL);
  41
  42         writel(0x00000000, ssif_base + UMC_CLKEN_SSIF_FETCH);
  43         writel(0x00000000, ssif_base + UMC_CLKEN_SSIF_COMQUE0);
  44         writel(0x00000000, ssif_base + UMC_CLKEN_SSIF_COMWC0);
  45         writel(0x00000000, ssif_base + UMC_CLKEN_SSIF_COMRC0);
  46         writel(0x00000000, ssif_base + UMC_CLKEN_SSIF_COMQUE1);
  47         writel(0x00000000, ssif_base + UMC_CLKEN_SSIF_COMWC1);
  48         writel(0x00000000, ssif_base + UMC_CLKEN_SSIF_COMRC1);
  49         writel(0x00000000, ssif_base + UMC_CLKEN_SSIF_WC);
  50         writel(0x00000000, ssif_base + UMC_CLKEN_SSIF_RC);
  51         writel(0x00000000, ssif_base + UMC_CLKEN_SSIF_DST);
  52         writel(0x00000000, ssif_base + 0x0000c044);             /* DCGIV_SSIF_REG */
  53
  54         writel(0x00000001, ssif_base + UMC_CPURST);
  55         writel(0x00000001, ssif_base + UMC_IDSRST);
  56         writel(0x00000001, ssif_base + UMC_IXMRST);
  57         writel(0x00000001, ssif_base + UMC_HDMRST);
  58         writel(0x00000001, ssif_base + UMC_MDMRST);
  59         writel(0x00000001, ssif_base + UMC_HDDRST);
  60         writel(0x00000001, ssif_base + UMC_MDDRST);
  61         writel(0x00000001, ssif_base + UMC_SIORST);
  62         writel(0x00000001, ssif_base + UMC_GIORST);
  63         writel(0x00000001, ssif_base + UMC_HD2RST);
  64         writel(0x00000001, ssif_base + UMC_VIORST);
  65         writel(0x00000001, ssif_base + UMC_DVCRST);
  66         writel(0x00000001, ssif_base + UMC_RGLRST);
  67         writel(0x00000001, ssif_base + UMC_VPERST);
  68         writel(0x00000001, ssif_base + UMC_AIORST);
  69         writel(0x00000001, ssif_base + UMC_DMDRST);
  70 }
  71
  72 static int umc_dramcont_init(void __iomem *dc_base, void __iomem *ca_base,
  73                              int freq, unsigned long size, bool ddr3plus)
  74 {
  75         enum dram_size size_e;
  76
  77         if (freq != 1600) {
  78                 pr_err("Unsupported DDR frequency %d MHz\n", freq);
  79                 return -EINVAL;
  80         }
  81
  82         if (ddr3plus) {
  83                 pr_err("DDR3+ is not supported\n");
  84                 return -EINVAL;
  85         }
  86
  87         switch (size) {
  88         case SZ_128M:
  89                 size_e = DRAM_SZ_128M;
  90                 break;
  91         case SZ_256M:
  92                 size_e = DRAM_SZ_256M;
  93                 break;
  94         case SZ_512M:
  95                 size_e = DRAM_SZ_512M;
  96                 break;
  97         default:
  98                 pr_err("unsupported DRAM size 0x%08lx (per 16bit)\n", size);
  99                 return -EINVAL;
 100         }
 101
 102         writel(0x66bb0f17, dc_base + UMC_CMDCTLA);
 103         writel(0x18c6aa44, dc_base + UMC_CMDCTLB);
 104         writel(umc_spcctla[size_e], dc_base + UMC_SPCCTLA);
 105         writel(0x00ff0008, dc_base + UMC_SPCCTLB);
 106         writel(0x000c00ae, dc_base + UMC_RDATACTL_D0);
 107         writel(0x000c00ae, dc_base + UMC_RDATACTL_D1);
 108         writel(0x04060802, dc_base + UMC_WDATACTL_D0);
 109         writel(0x04060802, dc_base + UMC_WDATACTL_D1);
 110         writel(0x04a02000, dc_base + UMC_DATASET);
 111         writel(0x00000000, ca_base + 0x2300);
 112         writel(0x00400020, dc_base + UMC_DCCGCTL);
 113         writel(0x0000000f, dc_base + 0x7000);
 114         writel(0x0000000f, dc_base + 0x8000);
 115         writel(0x000000c3, dc_base + 0x8004);
 116         writel(0x00000071, dc_base + 0x8008);
 117         writel(0x00000004, dc_base + UMC_FLOWCTLG);
 118         writel(0x00000000, dc_base + 0x0060);
 119         writel(0x80000201, ca_base + 0xc20);
 120         writel(0x0801e01e, dc_base + UMC_FLOWCTLA);
 121         writel(0x00200000, dc_base + UMC_FLOWCTLB);
 122         writel(0x00004444, dc_base + UMC_FLOWCTLC);
 123         writel(0x200a0a00, dc_base + UMC_SPCSETB);
 124         writel(0x00010000, dc_base + UMC_SPCSETD);
 125         writel(0x80000020, dc_base + UMC_DFICUPDCTLA);
 126
 127         return 0;
 128 }
 129
 130 static int umc_ch_init(void __iomem *dc_base, void __iomem *ca_base,
 131                        int freq, unsigned long size, unsigned int width,
 132                        bool ddr3plus)
 133 {
 134         void __iomem *phy_base = dc_base + 0x00001000;
 135         int nr_phy = width / 16;
 136         int phy, ret;
 137
 138         writel(UMC_INITSET_INIT1EN, dc_base + UMC_INITSET);
 139         while (readl(dc_base + UMC_INITSTAT) & UMC_INITSTAT_INIT1ST)
 140                 cpu_relax();
 141
 142         for (phy = 0; phy < nr_phy; phy++) {
 143                 writel(0x00000100 | ((1 << (phy + 1)) - 1),
 144                        dc_base + UMC_DIOCTLA);
 145
 146                 ret = uniphier_ld4_ddrphy_init(phy_base, freq, ddr3plus);
 147                 if (ret)
 148                         return ret;
 149
 150                 ddrphy_prepare_training(phy_base, phy);
 151                 ret = ddrphy_training(phy_base);
 152                 if (ret)
 153                         return ret;
 154
 155                 phy_base += 0x00001000;
 156         }
 157
 158         return umc_dramcont_init(dc_base, ca_base, freq, size / (width / 16),
 159                                  ddr3plus);
 160 }
 161
 162 int uniphier_pro4_umc_init(const struct uniphier_board_data *bd)
 163 {
 164         void __iomem *umc_base = (void __iomem *)0x5b800000;
 165         void __iomem *ca_base = umc_base + 0x00001000;
 166         void __iomem *dc_base = umc_base + 0x00400000;
 167         void __iomem *ssif_base = umc_base;
 168         int ch, ret;
 169
 170         for (ch = 0; ch < DRAM_CH_NR; ch++) {
 171                 ret = umc_ch_init(dc_base, ca_base, bd->dram_freq,
 172                                   bd->dram_ch[ch].size,
 173                                   bd->dram_ch[ch].width,
 174                                   !!(bd->flags & UNIPHIER_BD_DDR3PLUS));
 175                 if (ret) {
 176                         pr_err("failed to initialize UMC ch%d\n", ch);
 177                         return ret;
 178                 }
 179
 180                 ca_base += 0x00001000;
 181                 dc_base += 0x00200000;
 182         }
 183
 184         umc_start_ssif(ssif_base);
 185
 186         return 0;
 187 }