Add sdram driver in U-Boot for get the correct sdram size from sys_reg, so that U-Boot can co-work with Rockchip loader or SPL to get different dram capability and then tell the kernel.
Signed-off-by: Kever Yang kever.yang@rock-chips.com ---
arch/arm/mach-rockchip/rk3328/Makefile | 1 + arch/arm/mach-rockchip/rk3328/sdram_rk3328.c | 66 ++++++++++++++++++++++++++++ 2 files changed, 67 insertions(+) create mode 100644 arch/arm/mach-rockchip/rk3328/sdram_rk3328.c
diff --git a/arch/arm/mach-rockchip/rk3328/Makefile b/arch/arm/mach-rockchip/rk3328/Makefile index bbab036..72873e2 100644 --- a/arch/arm/mach-rockchip/rk3328/Makefile +++ b/arch/arm/mach-rockchip/rk3328/Makefile @@ -6,4 +6,5 @@
obj-y += clk_rk3328.o obj-y += rk3328.o +obj-y += sdram_rk3328.o obj-y += syscon_rk3328.o diff --git a/arch/arm/mach-rockchip/rk3328/sdram_rk3328.c b/arch/arm/mach-rockchip/rk3328/sdram_rk3328.c new file mode 100644 index 0000000..79dd8ae --- /dev/null +++ b/arch/arm/mach-rockchip/rk3328/sdram_rk3328.c @@ -0,0 +1,66 @@ +/* + * (C) Copyright 2016 Rockchip Electronics Co., Ltd. + * + * SPDX-License-Identifier: GPL-2.0 + */ + +#include <common.h> +#include <dm.h> +#include <ram.h> +#include <syscon.h> +#include <asm/arch/clock.h> +#include <asm/arch/grf_rk3328.h> +#include <asm/arch/sdram_common.h> + +DECLARE_GLOBAL_DATA_PTR; +struct dram_info { + struct ram_info info; + struct rk3328_grf_regs *grf; +}; + +static int rk3328_dmc_probe(struct udevice *dev) +{ + struct dram_info *priv = dev_get_priv(dev); + + priv->grf = syscon_get_first_range(ROCKCHIP_SYSCON_GRF); + debug("%s: grf=%p\n", __func__, priv->grf); + priv->info.base = CONFIG_SYS_SDRAM_BASE; + priv->info.size = rockchip_sdram_size( + (phys_addr_t)&priv->grf->os_reg[2]); + /* + * we use the 0x00000000~0xfdffffff space since 0xff000000~0xffffffff + * is SoC register space (i.e. reserved), and 0xfe000000~0xfeffffff is + * inaccessible for some IP controller. + */ + priv->info.size = min(priv->info.size, 0xfe000000); + + return 0; +} + +static int rk3328_dmc_get_info(struct udevice *dev, struct ram_info *info) +{ + struct dram_info *priv = dev_get_priv(dev); + + *info = priv->info; + + return 0; +} + +static struct ram_ops rk3328_dmc_ops = { + .get_info = rk3328_dmc_get_info, +}; + + +static const struct udevice_id rk3328_dmc_ids[] = { + { .compatible = "rockchip,rk3328-dmc" }, + { } +}; + +U_BOOT_DRIVER(dmc_rk3328) = { + .name = "rockchip_rk3328_dmc", + .id = UCLASS_RAM, + .of_match = rk3328_dmc_ids, + .ops = &rk3328_dmc_ops, + .probe = rk3328_dmc_probe, + .priv_auto_alloc_size = sizeof(struct dram_info), +};