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.toms...@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
--
2.1.4
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