1 /* 2 * Copyright (C) 2011-2014 Panasonic Corporation 3 * Copyright (C) 2015-2016 Socionext Inc. 4 * Author: Masahiro Yamada <yamada.masahiro@socionext.com> 5 * 6 * SPDX-License-Identifier: GPL-2.0+ 7 */ 8 9 #include <common.h> 10 #include <linux/err.h> 11 #include <linux/io.h> 12 #include <linux/sizes.h> 13 #include <asm/processor.h> 14 15 #include "../init.h" 16 #include "ddrphy-init.h" 17 #include "umc-regs.h" 18 19 #define DRAM_CH_NR 2 20 21 enum dram_freq { 22 DRAM_FREQ_1333M, 23 DRAM_FREQ_1600M, 24 DRAM_FREQ_NR, 25 }; 26 27 enum dram_size { 28 DRAM_SZ_128M, 29 DRAM_SZ_256M, 30 DRAM_SZ_NR, 31 }; 32 33 static u32 umc_cmdctla_plus[DRAM_FREQ_NR] = {0x45990b11, 0x36bb0f17}; 34 static u32 umc_cmdctlb_plus[DRAM_FREQ_NR] = {0x16958924, 0x18c6aa24}; 35 static u32 umc_spcctla[DRAM_FREQ_NR][DRAM_SZ_NR] = { 36 {0x00240512, 0x00350512}, 37 {0x002b0617, 0x003f0617}, 38 }; 39 static u32 umc_spcctlb[DRAM_FREQ_NR] = {0x00ff0006, 0x00ff0008}; 40 static u32 umc_rdatactl[DRAM_FREQ_NR] = {0x000a00ac, 0x000c00ae}; 41 42 static int umc_get_rank(int ch) 43 { 44 return ch; /* ch0: rank0, ch1: rank1 for this SoC */ 45 } 46 47 static void umc_start_ssif(void __iomem *ssif_base) 48 { 49 writel(0x00000000, ssif_base + 0x0000b004); 50 writel(0xffffffff, ssif_base + 0x0000c004); 51 writel(0x000fffcf, ssif_base + 0x0000c008); 52 writel(0x00000001, ssif_base + 0x0000b000); 53 writel(0x00000001, ssif_base + 0x0000c000); 54 writel(0x03010101, ssif_base + UMC_MDMCHSEL); 55 writel(0x03010100, ssif_base + UMC_DMDCHSEL); 56 57 writel(0x00000000, ssif_base + UMC_CLKEN_SSIF_FETCH); 58 writel(0x00000000, ssif_base + UMC_CLKEN_SSIF_COMQUE0); 59 writel(0x00000000, ssif_base + UMC_CLKEN_SSIF_COMWC0); 60 writel(0x00000000, ssif_base + UMC_CLKEN_SSIF_COMRC0); 61 writel(0x00000000, ssif_base + UMC_CLKEN_SSIF_COMQUE1); 62 writel(0x00000000, ssif_base + UMC_CLKEN_SSIF_COMWC1); 63 writel(0x00000000, ssif_base + UMC_CLKEN_SSIF_COMRC1); 64 writel(0x00000000, ssif_base + UMC_CLKEN_SSIF_WC); 65 writel(0x00000000, ssif_base + UMC_CLKEN_SSIF_RC); 66 writel(0x00000000, ssif_base + UMC_CLKEN_SSIF_DST); 67 68 writel(0x00000001, ssif_base + UMC_CPURST); 69 writel(0x00000001, ssif_base + UMC_IDSRST); 70 writel(0x00000001, ssif_base + UMC_IXMRST); 71 writel(0x00000001, ssif_base + UMC_MDMRST); 72 writel(0x00000001, ssif_base + UMC_MDDRST); 73 writel(0x00000001, ssif_base + UMC_SIORST); 74 writel(0x00000001, ssif_base + UMC_VIORST); 75 writel(0x00000001, ssif_base + UMC_FRCRST); 76 writel(0x00000001, ssif_base + UMC_RGLRST); 77 writel(0x00000001, ssif_base + UMC_AIORST); 78 writel(0x00000001, ssif_base + UMC_DMDRST); 79 } 80 81 static int umc_dramcont_init(void __iomem *dc_base, void __iomem *ca_base, 82 int freq, unsigned long size, bool ddr3plus) 83 { 84 enum dram_freq freq_e; 85 enum dram_size size_e; 86 87 if (!ddr3plus) { 88 pr_err("DDR3 standard is not supported\n"); 89 return -EINVAL; 90 } 91 92 switch (freq) { 93 case 1333: 94 freq_e = DRAM_FREQ_1333M; 95 break; 96 case 1600: 97 freq_e = DRAM_FREQ_1600M; 98 break; 99 default: 100 pr_err("unsupported DRAM frequency %d MHz\n", freq); 101 return -EINVAL; 102 } 103 104 switch (size) { 105 case 0: 106 return 0; 107 case SZ_128M: 108 size_e = DRAM_SZ_128M; 109 break; 110 case SZ_256M: 111 size_e = DRAM_SZ_256M; 112 break; 113 default: 114 pr_err("unsupported DRAM size 0x%08lx\n", size); 115 return -EINVAL; 116 } 117 118 writel(umc_cmdctla_plus[freq_e], dc_base + UMC_CMDCTLA); 119 writel(umc_cmdctlb_plus[freq_e], dc_base + UMC_CMDCTLB); 120 writel(umc_spcctla[freq_e][size_e], dc_base + UMC_SPCCTLA); 121 writel(umc_spcctlb[freq_e], dc_base + UMC_SPCCTLB); 122 writel(umc_rdatactl[freq_e], dc_base + UMC_RDATACTL_D0); 123 writel(0x04060806, dc_base + UMC_WDATACTL_D0); 124 writel(0x04a02000, dc_base + UMC_DATASET); 125 writel(0x00000000, ca_base + 0x2300); 126 writel(0x00400020, dc_base + UMC_DCCGCTL); 127 writel(0x00000003, dc_base + 0x7000); 128 writel(0x0000000f, dc_base + 0x8000); 129 writel(0x000000c3, dc_base + 0x8004); 130 writel(0x00000071, dc_base + 0x8008); 131 writel(0x0000003b, dc_base + UMC_DICGCTLA); 132 writel(0x020a0808, dc_base + UMC_DICGCTLB); 133 writel(0x00000004, dc_base + UMC_FLOWCTLG); 134 writel(0x80000201, ca_base + 0xc20); 135 writel(0x0801e01e, dc_base + UMC_FLOWCTLA); 136 writel(0x00200000, dc_base + UMC_FLOWCTLB); 137 writel(0x00004444, dc_base + UMC_FLOWCTLC); 138 writel(0x200a0a00, dc_base + UMC_SPCSETB); 139 writel(0x00000000, dc_base + UMC_SPCSETD); 140 writel(0x00000520, dc_base + UMC_DFICUPDCTLA); 141 142 return 0; 143 } 144 145 static int umc_ch_init(void __iomem *dc_base, void __iomem *ca_base, 146 int freq, unsigned long size, bool ddr3plus, int ch) 147 { 148 void __iomem *phy_base = dc_base + 0x00001000; 149 int ret; 150 151 writel(UMC_INITSET_INIT1EN, dc_base + UMC_INITSET); 152 while (readl(dc_base + UMC_INITSTAT) & UMC_INITSTAT_INIT1ST) 153 cpu_relax(); 154 155 writel(0x00000101, dc_base + UMC_DIOCTLA); 156 157 ret = uniphier_ld4_ddrphy_init(phy_base, freq, ddr3plus); 158 if (ret) 159 return ret; 160 161 ddrphy_prepare_training(phy_base, umc_get_rank(ch)); 162 ret = ddrphy_training(phy_base); 163 if (ret) 164 return ret; 165 166 return umc_dramcont_init(dc_base, ca_base, freq, size, ddr3plus); 167 } 168 169 int uniphier_ld4_umc_init(const struct uniphier_board_data *bd) 170 { 171 void __iomem *umc_base = (void __iomem *)0x5b800000; 172 void __iomem *ca_base = umc_base + 0x00001000; 173 void __iomem *dc_base = umc_base + 0x00400000; 174 void __iomem *ssif_base = umc_base; 175 int ch, ret; 176 177 for (ch = 0; ch < DRAM_CH_NR; ch++) { 178 ret = umc_ch_init(dc_base, ca_base, bd->dram_freq, 179 bd->dram_ch[ch].size, 180 !!(bd->flags & UNIPHIER_BD_DDR3PLUS), ch); 181 if (ret) { 182 pr_err("failed to initialize UMC ch%d\n", ch); 183 return ret; 184 } 185 186 ca_base += 0x00001000; 187 dc_base += 0x00200000; 188 } 189 190 umc_start_ssif(ssif_base); 191 192 return 0; 193 } 194