Adds SPL support for the RK3368 (assuming that our TPL stage has initialised DRAM and set up the memory firewall).
This includes an implementation of board_debug_uart_init().
Signed-off-by: Philipp Tomsich philipp.tomsich@theobroma-systems.com ---
arch/arm/mach-rockchip/rk3368-board-spl.c | 91 +++++++++++++++++++++++++++++++ 1 file changed, 91 insertions(+) create mode 100644 arch/arm/mach-rockchip/rk3368-board-spl.c
diff --git a/arch/arm/mach-rockchip/rk3368-board-spl.c b/arch/arm/mach-rockchip/rk3368-board-spl.c new file mode 100644 index 0000000..eefe3bf --- /dev/null +++ b/arch/arm/mach-rockchip/rk3368-board-spl.c @@ -0,0 +1,91 @@ +/* + * (C) Copyright 2017 Theobroma Systems Design und Consulting GmbH + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <debug_uart.h> +#include <dm.h> +#include <ram.h> +#include <spl.h> +#include <asm/io.h> +#include <asm/arch/bootrom.h> +#include <asm/arch/cru_rk3368.h> +#include <asm/arch/grf_rk3368.h> +#include <asm/arch/hardware.h> +#include <asm/arch/timer.h> + +DECLARE_GLOBAL_DATA_PTR; + +/* + * The ARMv8 generic timer uses the STIMER1 as its clock-source. + * Set up the STIMER1 to free-running (i.e. auto-reload) to start + * the generic timer counting (if we don't do this, udelay will not + * work and block indefinitively). + */ +static void secure_timer_init(void) +{ + struct rk_timer * const stimer1 = + (struct rk_timer * const)0xff830020; + const u32 TIMER_EN = BIT(0); + + writel(~0u, &stimer1->timer_load_count0); + writel(~0u, &stimer1->timer_load_count1); + writel(TIMER_EN, &stimer1->timer_ctrl_reg); +} + +void board_debug_uart_init(void) +{ + struct rk3368_grf * const grf = + (struct rk3368_grf * const)0xff770000; + +#if defined(CONFIG_DEBUG_UART_BASE) && (CONFIG_DEBUG_UART_BASE == 0xff180000) + /* Enable early UART0 on the RK3368 */ + rk_clrsetreg(&grf->gpio2d_iomux, + RK3368_GPIO2D0_MASK, RK3368_GPIO2D0_UART0_SIN); + rk_clrsetreg(&grf->gpio2d_iomux, + RK3368_GPIO2D1_MASK, RK3368_GPIO2D1_UART0_SOUT); +#endif +} + +void board_init_f(ulong dummy) +{ + struct udevice *dev; + int ret; + + ret = spl_early_init(); + if (ret) { + debug("spl_early_init() failed: %d\n", ret); + hang(); + } + + /* Make sure the ARMv8 generic timer counts */ + secure_timer_init(); + + ret = uclass_get_device(UCLASS_RAM, 0, &dev); + if (ret) { + debug("DRAM init failed: %d\n", ret); + return; + } +} + +u32 spl_boot_mode(const u32 boot_device) +{ + return MMCSD_MODE_RAW; +} + +u32 spl_boot_device(void) +{ + return BOOT_DEVICE_MMC1; +} + +#ifdef CONFIG_SPL_LOAD_FIT +int board_fit_config_name_match(const char *name) +{ + /* Just empty function now - can't decide what to choose */ + debug("%s: %s\n", __func__, name); + + return 0; +} +#endif