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 #include <asm/processor.h> 12 13 #include "../init.h" 14 #include "ddrphy-regs.h" 15 #include "umc-regs.h" 16 17 #define DRAM_CH_NR 2 18 19 enum dram_size { 20 DRAM_SZ_128M, 21 DRAM_SZ_256M, 22 DRAM_SZ_512M, 23 DRAM_SZ_NR, 24 }; 25 26 static u32 umc_spcctla[DRAM_SZ_NR] = {0x002b0617, 0x003f0617, 0x00770617}; 27 28 static void umc_start_ssif(void __iomem *ssif_base) 29 { 30 writel(0x00000000, ssif_base + 0x0000b004); 31 writel(0xffffffff, ssif_base + 0x0000c004); 32 writel(0x000fffcf, ssif_base + 0x0000c008); 33 writel(0x00000001, ssif_base + 0x0000b000); 34 writel(0x00000001, ssif_base + 0x0000c000); 35 36 writel(0x03010100, ssif_base + UMC_HDMCHSEL); 37 writel(0x03010101, ssif_base + UMC_MDMCHSEL); 38 writel(0x03010100, ssif_base + UMC_DVCCHSEL); 39 writel(0x03010100, ssif_base + UMC_DMDCHSEL); 40 41 writel(0x00000000, ssif_base + UMC_CLKEN_SSIF_FETCH); 42 writel(0x00000000, ssif_base + UMC_CLKEN_SSIF_COMQUE0); 43 writel(0x00000000, ssif_base + UMC_CLKEN_SSIF_COMWC0); 44 writel(0x00000000, ssif_base + UMC_CLKEN_SSIF_COMRC0); 45 writel(0x00000000, ssif_base + UMC_CLKEN_SSIF_COMQUE1); 46 writel(0x00000000, ssif_base + UMC_CLKEN_SSIF_COMWC1); 47 writel(0x00000000, ssif_base + UMC_CLKEN_SSIF_COMRC1); 48 writel(0x00000000, ssif_base + UMC_CLKEN_SSIF_WC); 49 writel(0x00000000, ssif_base + UMC_CLKEN_SSIF_RC); 50 writel(0x00000000, ssif_base + UMC_CLKEN_SSIF_DST); 51 writel(0x00000000, ssif_base + 0x0000c044); /* DCGIV_SSIF_REG */ 52 53 writel(0x00000001, ssif_base + UMC_CPURST); 54 writel(0x00000001, ssif_base + UMC_IDSRST); 55 writel(0x00000001, ssif_base + UMC_IXMRST); 56 writel(0x00000001, ssif_base + UMC_HDMRST); 57 writel(0x00000001, ssif_base + UMC_MDMRST); 58 writel(0x00000001, ssif_base + UMC_HDDRST); 59 writel(0x00000001, ssif_base + UMC_MDDRST); 60 writel(0x00000001, ssif_base + UMC_SIORST); 61 writel(0x00000001, ssif_base + UMC_GIORST); 62 writel(0x00000001, ssif_base + UMC_HD2RST); 63 writel(0x00000001, ssif_base + UMC_VIORST); 64 writel(0x00000001, ssif_base + UMC_DVCRST); 65 writel(0x00000001, ssif_base + UMC_RGLRST); 66 writel(0x00000001, ssif_base + UMC_VPERST); 67 writel(0x00000001, ssif_base + UMC_AIORST); 68 writel(0x00000001, ssif_base + UMC_DMDRST); 69 } 70 71 static int umc_dramcont_init(void __iomem *dc_base, void __iomem *ca_base, 72 int freq, unsigned long size, bool ddr3plus) 73 { 74 enum dram_size size_e; 75 76 if (freq != 1600) { 77 pr_err("Unsupported DDR frequency %d MHz\n", freq); 78 return -EINVAL; 79 } 80 81 if (ddr3plus) { 82 pr_err("DDR3+ is not supported\n"); 83 return -EINVAL; 84 } 85 86 switch (size) { 87 case SZ_128M: 88 size_e = DRAM_SZ_128M; 89 break; 90 case SZ_256M: 91 size_e = DRAM_SZ_256M; 92 break; 93 case SZ_512M: 94 size_e = DRAM_SZ_512M; 95 break; 96 default: 97 pr_err("unsupported DRAM size 0x%08lx (per 16bit)\n", size); 98 return -EINVAL; 99 } 100 101 writel(0x66bb0f17, dc_base + UMC_CMDCTLA); 102 writel(0x18c6aa44, dc_base + UMC_CMDCTLB); 103 writel(umc_spcctla[size_e], dc_base + UMC_SPCCTLA); 104 writel(0x00ff0008, dc_base + UMC_SPCCTLB); 105 writel(0x000c00ae, dc_base + UMC_RDATACTL_D0); 106 writel(0x000c00ae, dc_base + UMC_RDATACTL_D1); 107 writel(0x04060802, dc_base + UMC_WDATACTL_D0); 108 writel(0x04060802, dc_base + UMC_WDATACTL_D1); 109 writel(0x04a02000, dc_base + UMC_DATASET); 110 writel(0x00000000, ca_base + 0x2300); 111 writel(0x00400020, dc_base + UMC_DCCGCTL); 112 writel(0x0000000f, dc_base + 0x7000); 113 writel(0x0000000f, dc_base + 0x8000); 114 writel(0x000000c3, dc_base + 0x8004); 115 writel(0x00000071, dc_base + 0x8008); 116 writel(0x00000004, dc_base + UMC_FLOWCTLG); 117 writel(0x00000000, dc_base + 0x0060); 118 writel(0x80000201, ca_base + 0xc20); 119 writel(0x0801e01e, dc_base + UMC_FLOWCTLA); 120 writel(0x00200000, dc_base + UMC_FLOWCTLB); 121 writel(0x00004444, dc_base + UMC_FLOWCTLC); 122 writel(0x200a0a00, dc_base + UMC_SPCSETB); 123 writel(0x00010000, dc_base + UMC_SPCSETD); 124 writel(0x80000020, dc_base + UMC_DFICUPDCTLA); 125 126 return 0; 127 } 128 129 static int umc_ch_init(void __iomem *dc_base, void __iomem *ca_base, 130 int freq, unsigned long size, unsigned int width, 131 bool ddr3plus) 132 { 133 void __iomem *phy_base = dc_base + 0x00001000; 134 int nr_phy = width / 16; 135 int phy, ret; 136 137 writel(UMC_INITSET_INIT1EN, dc_base + UMC_INITSET); 138 while (readl(dc_base + UMC_INITSET) & UMC_INITSTAT_INIT1ST) 139 cpu_relax(); 140 141 for (phy = 0; phy < nr_phy; phy++) { 142 writel(0x00000100 | ((1 << (phy + 1)) - 1), 143 dc_base + UMC_DIOCTLA); 144 145 ret = uniphier_ld4_ddrphy_init(phy_base, freq, ddr3plus); 146 if (ret) 147 return ret; 148 149 ddrphy_prepare_training(phy_base, phy); 150 ret = ddrphy_training(phy_base); 151 if (ret) 152 return ret; 153 154 phy_base += 0x00001000; 155 } 156 157 return umc_dramcont_init(dc_base, ca_base, freq, size / (width / 16), 158 ddr3plus); 159 } 160 161 int uniphier_pro4_umc_init(const struct uniphier_board_data *bd) 162 { 163 void __iomem *umc_base = (void __iomem *)0x5b800000; 164 void __iomem *ca_base = umc_base + 0x00001000; 165 void __iomem *dc_base = umc_base + 0x00400000; 166 void __iomem *ssif_base = umc_base; 167 int ch, ret; 168 169 for (ch = 0; ch < DRAM_CH_NR; ch++) { 170 ret = umc_ch_init(dc_base, ca_base, bd->dram_freq, 171 bd->dram_ch[ch].size, 172 bd->dram_ch[ch].width, 173 bd->dram_ddr3plus); 174 if (ret) { 175 pr_err("failed to initialize UMC ch%d\n", ch); 176 return ret; 177 } 178 179 ca_base += 0x00001000; 180 dc_base += 0x00200000; 181 } 182 183 umc_start_ssif(ssif_base); 184 185 return 0; 186 } 187