1 /* 2 * Copyright (C) 2015, Bin Meng <bmeng.cn@gmail.com> 3 * 4 * SPDX-License-Identifier: GPL-2.0+ 5 */ 6 7 #include <common.h> 8 #include <errno.h> 9 #include <fdtdec.h> 10 #include <asm/post.h> 11 #include <asm/arch/mrc.h> 12 #include <asm/arch/quark.h> 13 14 DECLARE_GLOBAL_DATA_PTR; 15 16 static int mrc_configure_params(struct mrc_params *mrc_params) 17 { 18 const void *blob = gd->fdt_blob; 19 int node; 20 int mrc_flags; 21 22 node = fdtdec_next_compatible(blob, 0, COMPAT_INTEL_QRK_MRC); 23 if (node < 0) { 24 debug("%s: Cannot find MRC node\n", __func__); 25 return -EINVAL; 26 } 27 28 /* 29 * TODO: 30 * 31 * We need support fast boot (MRC cache) in the future. 32 * 33 * Set boot mode to cold boot for now 34 */ 35 mrc_params->boot_mode = BM_COLD; 36 37 /* 38 * TODO: 39 * 40 * We need determine ECC by pin strap state 41 * 42 * Disable ECC by default for now 43 */ 44 mrc_params->ecc_enables = 0; 45 46 mrc_flags = fdtdec_get_int(blob, node, "flags", 0); 47 if (mrc_flags & MRC_FLAG_SCRAMBLE_EN) 48 mrc_params->scrambling_enables = 1; 49 else 50 mrc_params->scrambling_enables = 0; 51 52 mrc_params->dram_width = fdtdec_get_int(blob, node, "dram-width", 0); 53 mrc_params->ddr_speed = fdtdec_get_int(blob, node, "dram-speed", 0); 54 mrc_params->ddr_type = fdtdec_get_int(blob, node, "dram-type", 0); 55 56 mrc_params->rank_enables = fdtdec_get_int(blob, node, "rank-mask", 0); 57 mrc_params->channel_enables = fdtdec_get_int(blob, node, 58 "chan-mask", 0); 59 mrc_params->channel_width = fdtdec_get_int(blob, node, 60 "chan-width", 0); 61 mrc_params->address_mode = fdtdec_get_int(blob, node, "addr-mode", 0); 62 63 mrc_params->refresh_rate = fdtdec_get_int(blob, node, 64 "refresh-rate", 0); 65 mrc_params->sr_temp_range = fdtdec_get_int(blob, node, 66 "sr-temp-range", 0); 67 mrc_params->ron_value = fdtdec_get_int(blob, node, 68 "ron-value", 0); 69 mrc_params->rtt_nom_value = fdtdec_get_int(blob, node, 70 "rtt-nom-value", 0); 71 mrc_params->rd_odt_value = fdtdec_get_int(blob, node, 72 "rd-odt-value", 0); 73 74 mrc_params->params.density = fdtdec_get_int(blob, node, 75 "dram-density", 0); 76 mrc_params->params.cl = fdtdec_get_int(blob, node, "dram-cl", 0); 77 mrc_params->params.ras = fdtdec_get_int(blob, node, "dram-ras", 0); 78 mrc_params->params.wtr = fdtdec_get_int(blob, node, "dram-wtr", 0); 79 mrc_params->params.rrd = fdtdec_get_int(blob, node, "dram-rrd", 0); 80 mrc_params->params.faw = fdtdec_get_int(blob, node, "dram-faw", 0); 81 82 debug("MRC dram_width %d\n", mrc_params->dram_width); 83 debug("MRC rank_enables %d\n", mrc_params->rank_enables); 84 debug("MRC ddr_speed %d\n", mrc_params->ddr_speed); 85 debug("MRC flags: %s\n", 86 (mrc_params->scrambling_enables) ? "SCRAMBLE_EN" : ""); 87 88 debug("MRC density=%d tCL=%d tRAS=%d tWTR=%d tRRD=%d tFAW=%d\n", 89 mrc_params->params.density, mrc_params->params.cl, 90 mrc_params->params.ras, mrc_params->params.wtr, 91 mrc_params->params.rrd, mrc_params->params.faw); 92 93 return 0; 94 } 95 96 int dram_init(void) 97 { 98 struct mrc_params mrc_params; 99 int ret; 100 101 memset(&mrc_params, 0, sizeof(struct mrc_params)); 102 ret = mrc_configure_params(&mrc_params); 103 if (ret) 104 return ret; 105 106 /* Set up the DRAM by calling the memory reference code */ 107 mrc_init(&mrc_params); 108 if (mrc_params.status) 109 return -EIO; 110 111 gd->ram_size = mrc_params.mem_size; 112 post_code(POST_DRAM); 113 114 return 0; 115 } 116 117 void dram_init_banksize(void) 118 { 119 gd->bd->bi_dram[0].start = 0; 120 gd->bd->bi_dram[0].size = gd->ram_size; 121 } 122 123 /* 124 * This function looks for the highest region of memory lower than 4GB which 125 * has enough space for U-Boot where U-Boot is aligned on a page boundary. 126 * It overrides the default implementation found elsewhere which simply 127 * picks the end of ram, wherever that may be. The location of the stack, 128 * the relocation address, and how far U-Boot is moved by relocation are 129 * set in the global data structure. 130 */ 131 ulong board_get_usable_ram_top(ulong total_size) 132 { 133 return gd->ram_size; 134 } 135