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author | Tom Rini <trini@konsulko.com> | 2017-07-11 14:21:50 -0400 |
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committer | Tom Rini <trini@konsulko.com> | 2017-07-11 14:21:50 -0400 |
commit | d43ef73bf26614af9b01fd57baa1a1fcf24bfade (patch) | |
tree | e37eac34d78100d69ac984525f98186d1e68d0b7 /arch/arm/mach-rockchip/sdram_common.c | |
parent | 6b26aaef083957b75bcd69aa65bd6ffcf9245bb3 (diff) | |
parent | 2454b719fb874120e06e4aa64bfb9450d091e56c (diff) | |
download | u-boot-d43ef73bf26614af9b01fd57baa1a1fcf24bfade.tar.gz u-boot-d43ef73bf26614af9b01fd57baa1a1fcf24bfade.tar.xz u-boot-d43ef73bf26614af9b01fd57baa1a1fcf24bfade.zip |
Merge branch 'master' of git://git.denx.de/u-boot-rockchip
Diffstat (limited to 'arch/arm/mach-rockchip/sdram_common.c')
-rw-r--r-- | arch/arm/mach-rockchip/sdram_common.c | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/arch/arm/mach-rockchip/sdram_common.c b/arch/arm/mach-rockchip/sdram_common.c new file mode 100644 index 0000000000..76dbdc8715 --- /dev/null +++ b/arch/arm/mach-rockchip/sdram_common.c @@ -0,0 +1,83 @@ +/* + * Copyright (C) 2017 Rockchip Electronics Co., Ltd. + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <dm.h> +#include <ram.h> +#include <asm/io.h> +#include <asm/arch/sdram_common.h> +#include <dm/uclass-internal.h> + +DECLARE_GLOBAL_DATA_PTR; +size_t rockchip_sdram_size(phys_addr_t reg) +{ + u32 rank, col, bk, cs0_row, cs1_row, bw, row_3_4; + size_t chipsize_mb = 0; + size_t size_mb = 0; + u32 ch; + + u32 sys_reg = readl(reg); + u32 ch_num = 1 + ((sys_reg >> SYS_REG_NUM_CH_SHIFT) + & SYS_REG_NUM_CH_MASK); + + debug("%s %x %x\n", __func__, (u32)reg, sys_reg); + for (ch = 0; ch < ch_num; ch++) { + rank = 1 + (sys_reg >> SYS_REG_RANK_SHIFT(ch) & + SYS_REG_RANK_MASK); + col = 9 + (sys_reg >> SYS_REG_COL_SHIFT(ch) & SYS_REG_COL_MASK); + bk = 3 - ((sys_reg >> SYS_REG_BK_SHIFT(ch)) & SYS_REG_BK_MASK); + cs0_row = 13 + (sys_reg >> SYS_REG_CS0_ROW_SHIFT(ch) & + SYS_REG_CS0_ROW_MASK); + cs1_row = 13 + (sys_reg >> SYS_REG_CS1_ROW_SHIFT(ch) & + SYS_REG_CS1_ROW_MASK); + bw = (2 >> ((sys_reg >> SYS_REG_BW_SHIFT(ch)) & + SYS_REG_BW_MASK)); + row_3_4 = sys_reg >> SYS_REG_ROW_3_4_SHIFT(ch) & + SYS_REG_ROW_3_4_MASK; + + chipsize_mb = (1 << (cs0_row + col + bk + bw - 20)); + + if (rank > 1) + chipsize_mb += chipsize_mb >> (cs0_row - cs1_row); + if (row_3_4) + chipsize_mb = chipsize_mb * 3 / 4; + size_mb += chipsize_mb; + debug("rank %d col %d bk %d cs0_row %d bw %d row_3_4 %d\n", + rank, col, bk, cs0_row, bw, row_3_4); + } + + return (size_t)size_mb << 20; +} + +int dram_init(void) +{ + struct ram_info ram; + struct udevice *dev; + int ret; + + ret = uclass_get_device(UCLASS_RAM, 0, &dev); + if (ret) { + debug("DRAM init failed: %d\n", ret); + return ret; + } + ret = ram_get_info(dev, &ram); + if (ret) { + debug("Cannot get DRAM size: %d\n", ret); + return ret; + } + gd->ram_size = ram.size; + debug("SDRAM base=%lx, size=%lx\n", + (unsigned long)ram.base, (unsigned long)ram.size); + + return 0; +} + +ulong board_get_usable_ram_top(ulong total_size) +{ + unsigned long top = CONFIG_SYS_SDRAM_BASE + SDRAM_MAX_SIZE; + + return (gd->ram_top > top) ? top : gd->ram_top; +} |