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author | Albert ARIBAUD <albert.u.boot@aribaud.net> | 2015-10-14 10:46:36 +0200 |
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committer | Albert ARIBAUD <albert.u.boot@aribaud.net> | 2015-10-14 10:46:36 +0200 |
commit | 13a3972585af60ec367d209cedbd3601e0c77467 (patch) | |
tree | 4b3312669b3e501f6bc10b39d8c7bbf516f07aac /arch/arm/mach-uniphier/memconf/memconf.c | |
parent | 208bd51396fb606dbdcf45b064e6b372d7dd3e81 (diff) | |
parent | 297faccca2235e359012118495b9b73451d54bb9 (diff) | |
download | u-boot-imx-13a3972585af60ec367d209cedbd3601e0c77467.zip u-boot-imx-13a3972585af60ec367d209cedbd3601e0c77467.tar.gz u-boot-imx-13a3972585af60ec367d209cedbd3601e0c77467.tar.bz2 |
Merge remote-tracking branch 'u-boot/master'
Diffstat (limited to 'arch/arm/mach-uniphier/memconf/memconf.c')
-rw-r--r-- | arch/arm/mach-uniphier/memconf/memconf.c | 104 |
1 files changed, 104 insertions, 0 deletions
diff --git a/arch/arm/mach-uniphier/memconf/memconf.c b/arch/arm/mach-uniphier/memconf/memconf.c new file mode 100644 index 0000000..d490736 --- /dev/null +++ b/arch/arm/mach-uniphier/memconf/memconf.c @@ -0,0 +1,104 @@ +/* + * Copyright (C) 2011-2015 Masahiro Yamada <yamada.masahiro@socionext.com> + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <linux/err.h> +#include <linux/io.h> +#include <linux/sizes.h> +#include <mach/init.h> +#include <mach/sg-regs.h> + +int memconf_init(const struct uniphier_board_data *bd) +{ + u32 tmp = 0; + unsigned long size_per_word; + + tmp = readl(SG_MEMCONF); + + tmp &= ~(SG_MEMCONF_CH0_SZ_MASK | SG_MEMCONF_CH0_NUM_MASK); + + switch (bd->dram_ch0_width) { + case 16: + tmp |= SG_MEMCONF_CH0_NUM_1; + size_per_word = bd->dram_ch0_size; + break; + case 32: + tmp |= SG_MEMCONF_CH0_NUM_2; + size_per_word = bd->dram_ch0_size >> 1; + break; + default: + pr_err("error: unsupported DRAM Ch0 width\n"); + return -EINVAL; + } + + /* Set DDR size */ + switch (size_per_word) { + case SZ_64M: + tmp |= SG_MEMCONF_CH0_SZ_64M; + break; + case SZ_128M: + tmp |= SG_MEMCONF_CH0_SZ_128M; + break; + case SZ_256M: + tmp |= SG_MEMCONF_CH0_SZ_256M; + break; + case SZ_512M: + tmp |= SG_MEMCONF_CH0_SZ_512M; + break; + case SZ_1G: + tmp |= SG_MEMCONF_CH0_SZ_1G; + break; + default: + pr_err("error: unsupported DRAM Ch0 size\n"); + return -EINVAL; + } + + tmp &= ~(SG_MEMCONF_CH1_SZ_MASK | SG_MEMCONF_CH1_NUM_MASK); + + switch (bd->dram_ch1_width) { + case 16: + tmp |= SG_MEMCONF_CH1_NUM_1; + size_per_word = bd->dram_ch1_size; + break; + case 32: + tmp |= SG_MEMCONF_CH1_NUM_2; + size_per_word = bd->dram_ch1_size >> 1; + break; + default: + pr_err("error: unsupported DRAM Ch1 width\n"); + return -EINVAL; + } + + switch (size_per_word) { + case SZ_64M: + tmp |= SG_MEMCONF_CH1_SZ_64M; + break; + case SZ_128M: + tmp |= SG_MEMCONF_CH1_SZ_128M; + break; + case SZ_256M: + tmp |= SG_MEMCONF_CH1_SZ_256M; + break; + case SZ_512M: + tmp |= SG_MEMCONF_CH1_SZ_512M; + break; + case SZ_1G: + tmp |= SG_MEMCONF_CH1_SZ_1G; + break; + default: + pr_err("error: unsupported DRAM Ch1 size\n"); + return -EINVAL; + } + + if (bd->dram_ch0_base + bd->dram_ch0_size < bd->dram_ch1_base) + tmp |= SG_MEMCONF_SPARSEMEM; + else + tmp &= ~SG_MEMCONF_SPARSEMEM; + + writel(tmp, SG_MEMCONF); + + return 0; +} |