2 * Copyright (C) 2011-2015 Panasonic Corporation
3 * Copyright (C) 2016 Socionext Inc.
4 * Author: Masahiro Yamada <yamada.masahiro@socionext.com>
6 * SPDX-License-Identifier: GPL-2.0+
10 #include <linux/errno.h>
12 #include <linux/sizes.h>
17 static int __uniphier_memconf_init(const struct uniphier_board_data *bd,
21 unsigned long size_per_word;
24 switch (bd->dram_ch[0].width) {
26 val |= SG_MEMCONF_CH0_NUM_1;
27 size_per_word = bd->dram_ch[0].size;
30 val |= SG_MEMCONF_CH0_NUM_2;
31 size_per_word = bd->dram_ch[0].size >> 1;
34 pr_err("error: unsupported DRAM ch0 width\n");
38 switch (size_per_word) {
40 val |= SG_MEMCONF_CH0_SZ_64M;
43 val |= SG_MEMCONF_CH0_SZ_128M;
46 val |= SG_MEMCONF_CH0_SZ_256M;
49 val |= SG_MEMCONF_CH0_SZ_512M;
52 val |= SG_MEMCONF_CH0_SZ_1G;
55 pr_err("error: unsupported DRAM ch0 size\n");
60 switch (bd->dram_ch[1].width) {
62 val |= SG_MEMCONF_CH1_NUM_1;
63 size_per_word = bd->dram_ch[1].size;
66 val |= SG_MEMCONF_CH1_NUM_2;
67 size_per_word = bd->dram_ch[1].size >> 1;
70 pr_err("error: unsupported DRAM ch1 width\n");
74 switch (size_per_word) {
76 val |= SG_MEMCONF_CH1_SZ_64M;
79 val |= SG_MEMCONF_CH1_SZ_128M;
82 val |= SG_MEMCONF_CH1_SZ_256M;
85 val |= SG_MEMCONF_CH1_SZ_512M;
88 val |= SG_MEMCONF_CH1_SZ_1G;
91 pr_err("error: unsupported DRAM ch1 size\n");
96 if (bd->flags & UNIPHIER_BD_DRAM_SPARSE)
97 val |= SG_MEMCONF_SPARSEMEM;
102 if (!bd->dram_ch[2].size) {
103 val |= SG_MEMCONF_CH2_DISABLE;
108 switch (bd->dram_ch[2].width) {
110 val |= SG_MEMCONF_CH2_NUM_1;
111 size_per_word = bd->dram_ch[2].size;
114 val |= SG_MEMCONF_CH2_NUM_2;
115 size_per_word = bd->dram_ch[2].size >> 1;
118 pr_err("error: unsupported DRAM ch2 width\n");
122 switch (size_per_word) {
124 val |= SG_MEMCONF_CH2_SZ_64M;
127 val |= SG_MEMCONF_CH2_SZ_128M;
130 val |= SG_MEMCONF_CH2_SZ_256M;
133 val |= SG_MEMCONF_CH2_SZ_512M;
136 val |= SG_MEMCONF_CH2_SZ_1G;
139 pr_err("error: unsupported DRAM ch2 size\n");
144 writel(val, SG_MEMCONF);
149 int uniphier_memconf_2ch_init(const struct uniphier_board_data *bd)
151 return __uniphier_memconf_init(bd, 0);
154 int uniphier_memconf_3ch_init(const struct uniphier_board_data *bd)
156 return __uniphier_memconf_init(bd, 1);