rockchip: add common spl board file

The common spl board file handles board_init_f() in SPL,
and with board_early_init_f() and arch_cpu_init() callback,
other operateion after board_init_f() should go to board specific
spl_board_init().

Signed-off-by: Kever Yang <kever.yang@rock-chips.com>

arch/arm/mach-rockchip/Kconfig

@@ -227,6 +227,14 @@ config TPL_ROCKCHIP_BACK_TO_BROM
           SPL will return to the boot rom, which will then load the U-Boot
           binary to keep going on.
 
+config SPL_ROCKCHIP_COMMON_BOARD
+	bool "Rockchip SPL common board file"
+	depends on SPL
+	help
+	  Rockchip SoCs have similar boot process, SPL is mainly in charge of
+	  load and boot Trust ATF/U-Boot firmware, and DRAM init if there is
+	  no TPL for the board.
+
 config TPL_ROCKCHIP_COMMON_BOARD
 	bool ""
 	depends on TPL

arch/arm/mach-rockchip/Makefile

@@ -7,6 +7,7 @@
 # inaccessible/protected memory (and the bootrom-helper assumes that
 # the stack-pointer is valid before switching to the U-Boot stack).
 obj-spl-$(CONFIG_ROCKCHIP_BROM_HELPER) += bootrom.o
+obj-spl-$(CONFIG_SPL_ROCKCHIP_COMMON_BOARD) += spl.o spl-boot-order.o
 obj-tpl-$(CONFIG_ROCKCHIP_BROM_HELPER) += bootrom.o
 obj-tpl-$(CONFIG_TPL_ROCKCHIP_COMMON_BOARD) += tpl.o
 

arch/arm/mach-rockchip/spl.c

@@ -0,0 +1,154 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * (C) Copyright 2019 Rockchip Electronics Co., Ltd
+ */
+
+#include <common.h>
+#include <debug_uart.h>
+#include <dm.h>
+#include <ram.h>
+#include <spl.h>
+#include <asm/arch-rockchip/bootrom.h>
+#include <asm/arch-rockchip/sdram.h>
+#include <asm/io.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+void board_return_to_bootrom(void)
+{
+	back_to_bootrom(BROM_BOOT_NEXTSTAGE);
+}
+
+__weak const char * const boot_devices[BROM_LAST_BOOTSOURCE + 1] = {
+};
+
+const char *board_spl_was_booted_from(void)
+{
+	u32  bootdevice_brom_id = readl(BROM_BOOTSOURCE_ID_ADDR);
+	const char *bootdevice_ofpath = NULL;
+
+	if (bootdevice_brom_id < ARRAY_SIZE(boot_devices))
+		bootdevice_ofpath = boot_devices[bootdevice_brom_id];
+
+	if (bootdevice_ofpath)
+		debug("%s: brom_bootdevice_id %x maps to '%s'\n",
+		      __func__, bootdevice_brom_id, bootdevice_ofpath);
+	else
+		debug("%s: failed to resolve brom_bootdevice_id %x\n",
+		      __func__, bootdevice_brom_id);
+
+	return bootdevice_ofpath;
+}
+
+u32 spl_boot_device(void)
+{
+	u32 boot_device = BOOT_DEVICE_MMC1;
+
+#if defined(CONFIG_TARGET_CHROMEBOOK_JERRY) || \
+		defined(CONFIG_TARGET_CHROMEBIT_MICKEY) || \
+		defined(CONFIG_TARGET_CHROMEBOOK_MINNIE)
+	return BOOT_DEVICE_SPI;
+#endif
+	if (CONFIG_IS_ENABLED(ROCKCHIP_BACK_TO_BROM))
+		return BOOT_DEVICE_BOOTROM;
+
+	return boot_device;
+}
+
+u32 spl_boot_mode(const u32 boot_device)
+{
+	return MMCSD_MODE_RAW;
+}
+
+#if !defined(CONFIG_ROCKCHIP_RK3188)
+#define TIMER_LOAD_COUNT_L	0x00
+#define TIMER_LOAD_COUNT_H	0x04
+#define TIMER_CONTROL_REG	0x10
+#define TIMER_EN	0x1
+#define	TIMER_FMODE	BIT(0)
+#define	TIMER_RMODE	BIT(1)
+
+__weak void rockchip_stimer_init(void)
+{
+	/* If Timer already enabled, don't re-init it */
+	u32 reg = readl(CONFIG_ROCKCHIP_STIMER_BASE + TIMER_CONTROL_REG);
+
+	if (reg & TIMER_EN)
+		return;
+#ifndef CONFIG_ARM64
+	asm volatile("mcr p15, 0, %0, c14, c0, 0"
+		     : : "r"(COUNTER_FREQUENCY));
+#endif
+	writel(0, CONFIG_ROCKCHIP_STIMER_BASE + TIMER_CONTROL_REG);
+	writel(0xffffffff, CONFIG_ROCKCHIP_STIMER_BASE);
+	writel(0xffffffff, CONFIG_ROCKCHIP_STIMER_BASE + 4);
+	writel(TIMER_EN | TIMER_FMODE, CONFIG_ROCKCHIP_STIMER_BASE +
+	       TIMER_CONTROL_REG);
+}
+#endif
+
+__weak int board_early_init_f(void)
+{
+	return 0;
+}
+
+__weak int arch_cpu_init(void)
+{
+	return 0;
+}
+
+void board_init_f(ulong dummy)
+{
+	int ret;
+#if !defined(CONFIG_SUPPORT_TPL) || defined(CONFIG_SPL_OS_BOOT)
+	struct udevice *dev;
+#endif
+
+#ifdef CONFIG_DEBUG_UART
+	/*
+	 * Debug UART can be used from here if required:
+	 *
+	 * debug_uart_init();
+	 * printch('a');
+	 * printhex8(0x1234);
+	 * printascii("string");
+	 */
+	debug_uart_init();
+	debug("\nspl:debug uart enabled in %s\n", __func__);
+#endif
+
+	board_early_init_f();
+
+	ret = spl_early_init();
+	if (ret) {
+		printf("spl_early_init() failed: %d\n", ret);
+		hang();
+	}
+	arch_cpu_init();
+#if !defined(CONFIG_SUPPORT_TPL) || defined(CONFIG_SPL_OS_BOOT)
+	debug("\nspl:init dram\n");
+	ret = uclass_get_device(UCLASS_RAM, 0, &dev);
+	if (ret) {
+		printf("DRAM init failed: %d\n", ret);
+		return;
+	}
+#endif
+#if !defined(CONFIG_ROCKCHIP_RK3188)
+	rockchip_stimer_init();
+#endif
+#ifdef CONFIG_SYS_ARCH_TIMER
+	/* Init ARM arch timer in arch/arm/cpu/armv7/arch_timer.c */
+	timer_init();
+#endif
+	preloader_console_init();
+}
+
+#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