ARM: rmobile: Update E2 Alt

The E2 Alt port was broken since some time. This patch updates
the E2 Alt port to use modern frameworks, DM, DT probing, SPL
for the preloading and puts it on par with the M2 Porter board.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>

7 files changed, 547 insertions, 206 deletions

diff --git a/arch/arm/dts/r8a7794-alt-u-boot.dts b/arch/arm/dts/r8a7794-alt-u-boot.dts
index 8a14e46a7a..e179335d3a 100644
--- a/arch/arm/dts/r8a7794-alt-u-boot.dts
+++ b/arch/arm/dts/r8a7794-alt-u-boot.dts
@@ -8,3 +8,7 @@
 
 #include "r8a7794-alt.dts"
 #include "r8a7794-u-boot.dtsi"
+
+&scif2 {
+	u-boot,dm-pre-reloc;
+};
diff --git a/arch/arm/mach-rmobile/Kconfig.32 b/arch/arm/mach-rmobile/Kconfig.32
index 176f9a6296..84c1a6d07b 100644
--- a/arch/arm/mach-rmobile/Kconfig.32
+++ b/arch/arm/mach-rmobile/Kconfig.32
@@ -69,6 +69,9 @@ config TARGET_ALT
 	bool "Alt board"
 	select DM
 	select DM_SERIAL
+	select SUPPORT_SPL
+	select USE_TINY_PRINTF
+	select SPL_TINY_MEMSET
 
 config TARGET_SILK
 	bool "Silk board"
diff --git a/board/renesas/alt/Makefile b/board/renesas/alt/Makefile
index 22ab1f43d9..53418699b2 100644
--- a/board/renesas/alt/Makefile
+++ b/board/renesas/alt/Makefile
@@ -6,4 +6,8 @@
 # SPDX-License-Identifier: GPL-2.0
 #
 
-obj-y	:= alt.o qos.o ../rcar-common/common.o
+ifdef CONFIG_SPL_BUILD
+obj-y	:= alt_spl.o
+else
+obj-y	:= alt.o qos.o
+endif
diff --git a/board/renesas/alt/alt.c b/board/renesas/alt/alt.c
index f2200ef081..7598b1a4b9 100644
--- a/board/renesas/alt/alt.c
+++ b/board/renesas/alt/alt.c
@@ -43,176 +43,65 @@ void s_init(void)
 	qos_init();
 }
 
-#define TMU0_MSTP125	(1 << 25)
-#define SCIF2_MSTP719	(1 << 19)
-#define ETHER_MSTP813	(1 << 13)
-#define IIC1_MSTP323	(1 << 23)
-#define MMC0_MSTP315	(1 << 15)
-#define SDHI0_MSTP314	(1 << 14)
-#define SDHI1_MSTP312	(1 << 12)
+#define TMU0_MSTP125	BIT(25)
+#define MMC0_MSTP315	BIT(15)
 
 #define SD1CKCR		0xE6150078
-#define SD1_97500KHZ	0x7
+#define SD_97500KHZ	0x7
 
 int board_early_init_f(void)
 {
 	/* TMU */
 	mstp_clrbits_le32(MSTPSR1, SMSTPCR1, TMU0_MSTP125);
 
-	/* SCIF2 */
-	mstp_clrbits_le32(MSTPSR7, SMSTPCR7, SCIF2_MSTP719);
+	/* Set SD1 to the 97.5MHz */
+	writel(SD_97500KHZ, SD1CKCR);
 
-	/* ETHER */
-	mstp_clrbits_le32(MSTPSR8, SMSTPCR8, ETHER_MSTP813);
-
-	/* IIC1 / sh-i2c ch1 */
-	mstp_clrbits_le32(MSTPSR3, SMSTPCR3, IIC1_MSTP323);
-
-#ifdef CONFIG_SH_MMCIF
-	/* MMC */
-	mstp_clrbits_le32(MSTPSR3, SMSTPCR3, MMC0_MSTP315);
-#endif
-
-#ifdef CONFIG_SH_SDHI
-	/* SDHI0, 1 */
-	mstp_clrbits_le32(MSTPSR3, SMSTPCR3, SDHI0_MSTP314 | SDHI1_MSTP312);
-
-	/*
-	 * SD0 clock is set to 97.5MHz by default.
-	 * Set SD1 to the 97.5MHz as well.
-	 */
-	writel(SD1_97500KHZ, SD1CKCR);
-#endif
 	return 0;
 }
 
+#define ETHERNET_PHY_RESET	56	/* GPIO 1 24 */
+
 int board_init(void)
 {
 	/* adress of boot parameters */
 	gd->bd->bi_boot_params = CONFIG_SYS_SDRAM_BASE + 0x100;
 
-	/* Init PFC controller */
-	r8a7794_pinmux_init();
-
-	/* Ether Enable */
-#if defined(CONFIG_R8A7794_ETHERNET_B)
-	gpio_request(GPIO_FN_ETH_CRS_DV_B, NULL);
-	gpio_request(GPIO_FN_ETH_RX_ER_B, NULL);
-	gpio_request(GPIO_FN_ETH_RXD0_B, NULL);
-	gpio_request(GPIO_FN_ETH_RXD1_B, NULL);
-	gpio_request(GPIO_FN_ETH_LINK_B, NULL);
-	gpio_request(GPIO_FN_ETH_REFCLK_B, NULL);
-	gpio_request(GPIO_FN_ETH_MDIO_B, NULL);
-	gpio_request(GPIO_FN_ETH_TXD1_B, NULL);
-	gpio_request(GPIO_FN_ETH_TX_EN_B, NULL);
-	gpio_request(GPIO_FN_ETH_MAGIC_B, NULL);
-	gpio_request(GPIO_FN_ETH_TXD0_B, NULL);
-	gpio_request(GPIO_FN_ETH_MDC_B, NULL);
-#else
-	gpio_request(GPIO_FN_ETH_CRS_DV, NULL);
-	gpio_request(GPIO_FN_ETH_RX_ER, NULL);
-	gpio_request(GPIO_FN_ETH_RXD0, NULL);
-	gpio_request(GPIO_FN_ETH_RXD1, NULL);
-	gpio_request(GPIO_FN_ETH_LINK, NULL);
-	gpio_request(GPIO_FN_ETH_REFCLK, NULL);
-	gpio_request(GPIO_FN_ETH_MDIO, NULL);
-	gpio_request(GPIO_FN_ETH_TXD1, NULL);
-	gpio_request(GPIO_FN_ETH_TX_EN, NULL);
-	gpio_request(GPIO_FN_ETH_MAGIC, NULL);
-	gpio_request(GPIO_FN_ETH_TXD0, NULL);
-	gpio_request(GPIO_FN_ETH_MDC, NULL);
-#endif
-	gpio_request(GPIO_FN_IRQ8, NULL);
-
-	/* PHY reset */
-	gpio_request(GPIO_GP_1_24, NULL);
-	gpio_direction_output(GPIO_GP_1_24, 0);
+	/* Force ethernet PHY out of reset */
+	gpio_request(ETHERNET_PHY_RESET, "phy_reset");
+	gpio_direction_output(ETHERNET_PHY_RESET, 0);
 	mdelay(20);
-	gpio_set_value(GPIO_GP_1_24, 1);
+	gpio_direction_output(ETHERNET_PHY_RESET, 1);
 	udelay(1);
 
 	return 0;
 }
 
-#define CXR24 0xEE7003C0 /* MAC address high register */
-#define CXR25 0xEE7003C8 /* MAC address low register */
-int board_eth_init(bd_t *bis)
+int dram_init(void)
 {
-#ifdef CONFIG_SH_ETHER
-	int ret = -ENODEV;
-	u32 val;
-	unsigned char enetaddr[6];
-
-	ret = sh_eth_initialize(bis);
-	if (!eth_env_get_enetaddr("ethaddr", enetaddr))
-		return ret;
+	if (fdtdec_setup_memory_size() != 0)
+		return -EINVAL;
 
-	/* Set Mac address */
-	val = enetaddr[0] << 24 | enetaddr[1] << 16 |
-		enetaddr[2] << 8 | enetaddr[3];
-	writel(val, CXR24);
-
-	val = enetaddr[4] << 8 | enetaddr[5];
-	writel(val, CXR25);
-
-	return ret;
-#else
 	return 0;
-#endif
 }
 
-int board_mmc_init(bd_t *bis)
+int dram_init_banksize(void)
 {
-	int ret = -ENODEV;
-
-#ifdef CONFIG_SH_MMCIF
-	gpio_request(GPIO_GP_4_31, NULL);
-	gpio_set_value(GPIO_GP_4_31, 1);
-
-	ret = mmcif_mmc_init();
-#endif
-
-#ifdef CONFIG_SH_SDHI
-	gpio_request(GPIO_FN_SD0_DATA0, NULL);
-	gpio_request(GPIO_FN_SD0_DATA1, NULL);
-	gpio_request(GPIO_FN_SD0_DATA2, NULL);
-	gpio_request(GPIO_FN_SD0_DATA3, NULL);
-	gpio_request(GPIO_FN_SD0_CLK, NULL);
-	gpio_request(GPIO_FN_SD0_CMD, NULL);
-	gpio_request(GPIO_FN_SD0_CD, NULL);
-	gpio_request(GPIO_FN_SD1_DATA0, NULL);
-	gpio_request(GPIO_FN_SD1_DATA1, NULL);
-	gpio_request(GPIO_FN_SD1_DATA2, NULL);
-	gpio_request(GPIO_FN_SD1_DATA3, NULL);
-	gpio_request(GPIO_FN_SD1_CLK, NULL);
-	gpio_request(GPIO_FN_SD1_CMD, NULL);
-	gpio_request(GPIO_FN_SD1_CD, NULL);
-
-	/* SDHI 0 */
-	gpio_request(GPIO_GP_2_26, NULL);
-	gpio_request(GPIO_GP_2_29, NULL);
-	gpio_direction_output(GPIO_GP_2_26, 1);
-	gpio_direction_output(GPIO_GP_2_29, 1);
-
-	ret = sh_sdhi_init(CONFIG_SYS_SH_SDHI0_BASE, 0,
-			   SH_SDHI_QUIRK_16BIT_BUF);
-	if (ret)
-		return ret;
+	fdtdec_setup_memory_banksize();
 
-	/* SDHI 1 */
-	gpio_request(GPIO_GP_4_26, NULL);
-	gpio_request(GPIO_GP_4_29, NULL);
-	gpio_direction_output(GPIO_GP_4_26, 1);
-	gpio_direction_output(GPIO_GP_4_29, 1);
-
-	ret = sh_sdhi_init(CONFIG_SYS_SH_SDHI1_BASE, 1, 0);
-#endif
-	return ret;
+	return 0;
 }
 
-int dram_init(void)
+/* KSZ8041RNLI */
+#define PHY_CONTROL1		0x1E
+#define PHY_LED_MODE		0xC0000
+#define PHY_LED_MODE_ACK	0x4000
+int board_phy_config(struct phy_device *phydev)
 {
-	gd->ram_size = CONFIG_SYS_SDRAM_SIZE;
+	int ret = phy_read(phydev, MDIO_DEVAD_NONE, PHY_CONTROL1);
+	ret &= ~PHY_LED_MODE;
+	ret |= PHY_LED_MODE_ACK;
+	ret = phy_write(phydev, MDIO_DEVAD_NONE, PHY_CONTROL1, (u16)ret);
 
 	return 0;
 }
@@ -223,22 +112,38 @@ const struct rmobile_sysinfo sysinfo = {
 
 void reset_cpu(ulong addr)
 {
-	u8 val;
+	struct udevice *dev;
+	const u8 pmic_bus = 1;
+	const u8 pmic_addr = 0x58;
+	u8 data;
+	int ret;
 
-	i2c_set_bus_num(1); /* PowerIC connected to ch1 */
-	i2c_read(CONFIG_SYS_I2C_POWERIC_ADDR, 0x13, 1, &val, 1);
-	val |= 0x02;
-	i2c_write(CONFIG_SYS_I2C_POWERIC_ADDR, 0x13, 1, &val, 1);
+	ret = i2c_get_chip_for_busnum(pmic_bus, pmic_addr, 1, &dev);
+	if (ret)
+		hang();
+
+	ret = dm_i2c_read(dev, 0x13, &data, 1);
+	if (ret)
+		hang();
+
+	data |= BIT(1);
+
+	ret = dm_i2c_write(dev, 0x13, &data, 1);
+	if (ret)
+		hang();
 }
 
-static const struct sh_serial_platdata serial_platdata = {
-	.base = SCIF2_BASE,
-	.type = PORT_SCIF,
-	.clk = 14745600,
-	.clk_mode = EXT_CLK,
-};
+enum env_location env_get_location(enum env_operation op, int prio)
+{
+	const u32 load_magic = 0xb33fc0de;
 
-U_BOOT_DEVICE(alt_serials) = {
-	.name = "serial_sh",
-	.platdata = &serial_platdata,
-};
+	/* Block environment access if loaded using JTAG */
+	if ((readl(CONFIG_SPL_TEXT_BASE + 0x24) == load_magic) &&
+	    (op != ENVOP_INIT))
+		return ENVL_UNKNOWN;
+
+	if (prio)
+		return ENVL_UNKNOWN;
+
+	return ENVL_SPI_FLASH;
+}
diff --git a/board/renesas/alt/alt_spl.c b/board/renesas/alt/alt_spl.c
new file mode 100644
index 0000000000..f893a49257
--- /dev/null
+++ b/board/renesas/alt/alt_spl.c
@@ -0,0 +1,411 @@
+/*
+ * board/renesas/alt/alt_spl.c
+ *
+ * Copyright (C) 2018 Marek Vasut <marek.vasut@gmail.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0
+ */
+
+#include <common.h>
+#include <malloc.h>
+#include <dm/platform_data/serial_sh.h>
+#include <asm/processor.h>
+#include <asm/mach-types.h>
+#include <asm/io.h>
+#include <linux/errno.h>
+#include <asm/arch/sys_proto.h>
+#include <asm/gpio.h>
+#include <asm/arch/rmobile.h>
+#include <asm/arch/rcar-mstp.h>
+
+#include <spl.h>
+
+#define TMU0_MSTP125	BIT(25)
+#define SCIF2_MSTP719	BIT(19)
+#define QSPI_MSTP917	BIT(17)
+
+#define SD1CKCR		0xE6150078
+#define SD_97500KHZ	0x7
+
+struct reg_config {
+	u16	off;
+	u32	val;
+};
+
+static void dbsc_wait(u16 reg)
+{
+	static const u32 dbsc3_0_base = DBSC3_0_BASE;
+
+	while (!(readl(dbsc3_0_base + reg) & BIT(0)))
+		;
+}
+
+static void spl_init_sys(void)
+{
+	u32 r0 = 0;
+
+	writel(0xa5a5a500, 0xe6020004);
+	writel(0xa5a5a500, 0xe6030004);
+
+	asm volatile(
+		/* ICIALLU - Invalidate I$ to PoU */
+		"mcr	15, 0, %0, cr7, cr5, 0	\n"
+		/* BPIALL - Invalidate branch predictors */
+		"mcr	15, 0, %0, cr7, cr5, 6	\n"
+		/* Set SCTLR[IZ] */
+		"mrc	15, 0, %0, cr1, cr0, 0	\n"
+		"orr	%0, #0x1800		\n"
+		"mcr	15, 0, %0, cr1, cr0, 0	\n"
+		"isb	sy			\n"
+		:"=r"(r0));
+}
+
+static void spl_init_pfc(void)
+{
+	static const struct reg_config pfc_with_unlock[] = {
+		{ 0x0090, 0x00000000 },
+		{ 0x0094, 0x00000000 },
+		{ 0x0098, 0x00000000 },
+		{ 0x0020, 0x00000000 },
+		{ 0x0024, 0x00000000 },
+		{ 0x0028, 0x40000000 },
+		{ 0x002c, 0x00000155 },
+		{ 0x0030, 0x00000002 },
+		{ 0x0034, 0x00000000 },
+		{ 0x0038, 0x00000000 },
+		{ 0x003c, 0x00000000 },
+		{ 0x0040, 0x60000000 },
+		{ 0x0044, 0x36dab6db },
+		{ 0x0048, 0x926da012 },
+		{ 0x004c, 0x0008c383 },
+		{ 0x0050, 0x00000000 },
+		{ 0x0054, 0x00000140 },
+		{ 0x0004, 0xffffffff },
+		{ 0x0008, 0x00ec3fff },
+		{ 0x000c, 0x5bffffff },
+		{ 0x0010, 0x01bfe1ff },
+		{ 0x0014, 0x5bffffff },
+		{ 0x0018, 0x0f4b200f },
+		{ 0x001c, 0x03ffffff },
+	};
+
+	static const struct reg_config pfc_without_unlock[] = {
+		{ 0x0100, 0x00000000 },
+		{ 0x0104, 0x4203fc00 },
+		{ 0x0108, 0x00000000 },
+		{ 0x010c, 0x159007ff },
+		{ 0x0110, 0x80000000 },
+		{ 0x0114, 0x00de481f },
+		{ 0x0118, 0x00000000 },
+	};
+
+	static const struct reg_config pfc_with_unlock2[] = {
+		{ 0x0060, 0xffffffff },
+		{ 0x0064, 0xfffff000 },
+		{ 0x0068, 0x55555500 },
+		{ 0x006c, 0xffffff00 },
+		{ 0x0070, 0x00000000 },
+	};
+
+	static const u32 pfc_base = 0xe6060000;
+
+	unsigned int i;
+
+	for (i = 0; i < ARRAY_SIZE(pfc_with_unlock); i++) {
+		writel(~pfc_with_unlock[i].val, pfc_base);
+		writel(pfc_with_unlock[i].val,
+		       pfc_base | pfc_with_unlock[i].off);
+	}
+
+	for (i = 0; i < ARRAY_SIZE(pfc_without_unlock); i++)
+		writel(pfc_without_unlock[i].val,
+		       pfc_base | pfc_without_unlock[i].off);
+
+	for (i = 0; i < ARRAY_SIZE(pfc_with_unlock2); i++) {
+		writel(~pfc_with_unlock2[i].val, pfc_base);
+		writel(pfc_with_unlock2[i].val,
+		       pfc_base | pfc_with_unlock2[i].off);
+	}
+}
+
+static void spl_init_gpio(void)
+{
+	static const u16 gpio_offs[] = {
+		0x1000, 0x2000, 0x3000, 0x4000, 0x5000
+	};
+
+	static const struct reg_config gpio_set[] = {
+		{ 0x2000, 0x24000000 },
+		{ 0x4000, 0xa4000000 },
+		{ 0x5000, 0x0004c000 },
+	};
+
+	static const struct reg_config gpio_clr[] = {
+		{ 0x1000, 0x01000000 },
+		{ 0x2000, 0x24000000 },
+		{ 0x3000, 0x00000000 },
+		{ 0x4000, 0xa4000000 },
+		{ 0x5000, 0x0084c380 },
+	};
+
+	static const u32 gpio_base = 0xe6050000;
+
+	unsigned int i;
+
+	for (i = 0; i < ARRAY_SIZE(gpio_offs); i++)
+		writel(0, gpio_base | 0x20 | gpio_offs[i]);
+
+	for (i = 0; i < ARRAY_SIZE(gpio_offs); i++)
+		writel(0, gpio_base | 0x00 | gpio_offs[i]);
+
+	for (i = 0; i < ARRAY_SIZE(gpio_set); i++)
+		writel(gpio_set[i].val, gpio_base | 0x08 | gpio_set[i].off);
+
+	for (i = 0; i < ARRAY_SIZE(gpio_clr); i++)
+		writel(gpio_clr[i].val, gpio_base | 0x04 | gpio_clr[i].off);
+}
+
+static void spl_init_lbsc(void)
+{
+	static const struct reg_config lbsc_config[] = {
+		{ 0x00, 0x00000020 },
+		{ 0x08, 0x00002020 },
+		{ 0x30, 0x2a103320 },
+		{ 0x38, 0xff70ff70 },
+	};
+
+	static const u16 lbsc_offs[] = {
+		0x80, 0x84, 0x88, 0x8c, 0xa0, 0xc0, 0xc4, 0xc8
+	};
+
+	static const u32 lbsc_base = 0xfec00200;
+
+	unsigned int i;
+
+	for (i = 0; i < ARRAY_SIZE(lbsc_config); i++) {
+		writel(lbsc_config[i].val,
+		       lbsc_base | lbsc_config[i].off);
+		writel(lbsc_config[i].val,
+		       lbsc_base | (lbsc_config[i].off + 4));
+	}
+
+	for (i = 0; i < ARRAY_SIZE(lbsc_offs); i++)
+		writel(0, lbsc_base | lbsc_offs[i]);
+}
+
+static void spl_init_dbsc(void)
+{
+	static const struct reg_config dbsc_config1[] = {
+		{ 0x0018, 0x21000000 },
+		{ 0x0018, 0x11000000 },
+		{ 0x0018, 0x10000000 },
+		{ 0x0280, 0x0000a55a },
+		{ 0x0290, 0x00000001 },
+		{ 0x02a0, 0x80000000 },
+		{ 0x0290, 0x00000004 },
+	};
+
+	static const struct reg_config dbsc_config2[] = {
+		{ 0x0290, 0x00000006 },
+		{ 0x02a0, 0x0005c000 },
+	};
+
+	static const struct reg_config dbsc_config4[] = {
+		{ 0x0290, 0x00000010 },
+		{ 0x02a0, 0xf00464db },
+		{ 0x0290, 0x00000061 },
+		{ 0x02a0, 0x0000006d },
+		{ 0x0290, 0x00000001 },
+		{ 0x02a0, 0x00000073 },
+		{ 0x0020, 0x00000007 },
+		{ 0x0024, 0x0f030a02 },
+		{ 0x0030, 0x00000001 },
+		{ 0x00b0, 0x00000000 },
+		{ 0x0040, 0x00000009 },
+		{ 0x0044, 0x00000007 },
+		{ 0x0048, 0x00000000 },
+		{ 0x0050, 0x00000009 },
+		{ 0x0054, 0x000a0009 },
+		{ 0x0058, 0x00000021 },
+		{ 0x005c, 0x00000018 },
+		{ 0x0060, 0x00000005 },
+		{ 0x0064, 0x0000001b },
+		{ 0x0068, 0x00000007 },
+		{ 0x006c, 0x0000000a },
+		{ 0x0070, 0x00000009 },
+		{ 0x0074, 0x00000010 },
+		{ 0x0078, 0x000000ae },
+		{ 0x007c, 0x00140005 },
+		{ 0x0080, 0x00050004 },
+		{ 0x0084, 0x50213005 },
+		{ 0x0088, 0x000c0000 },
+		{ 0x008c, 0x00000200 },
+		{ 0x0090, 0x00000040 },
+		{ 0x0100, 0x00000001 },
+		{ 0x00c0, 0x00020001 },
+		{ 0x00c8, 0x20082008 },
+		{ 0x0380, 0x00020003 },
+		{ 0x0390, 0x0000001f },
+	};
+
+	static const struct reg_config dbsc_config5[] = {
+		{ 0x0244, 0x00000011 },
+		{ 0x0290, 0x00000003 },
+		{ 0x02a0, 0x0300c4e1 },
+		{ 0x0290, 0x00000023 },
+		{ 0x02a0, 0x00fcb6d0 },
+		{ 0x0290, 0x00000011 },
+		{ 0x02a0, 0x1000040b },
+		{ 0x0290, 0x00000012 },
+		{ 0x02a0, 0x85589955 },
+		{ 0x0290, 0x00000013 },
+		{ 0x02a0, 0x1a852400 },
+		{ 0x0290, 0x00000014 },
+		{ 0x02a0, 0x300210b4 },
+		{ 0x0290, 0x00000015 },
+		{ 0x02a0, 0x00000b50 },
+		{ 0x0290, 0x00000016 },
+		{ 0x02a0, 0x00000006 },
+		{ 0x0290, 0x00000017 },
+		{ 0x02a0, 0x00000010 },
+		{ 0x0290, 0x0000001a },
+		{ 0x02a0, 0x910035c7 },
+		{ 0x0290, 0x00000004 },
+	};
+
+	static const struct reg_config dbsc_config6[] = {
+		{ 0x0290, 0x00000001 },
+		{ 0x02a0, 0x00000181 },
+		{ 0x0018, 0x11000000 },
+		{ 0x0290, 0x00000004 },
+	};
+
+	static const struct reg_config dbsc_config7[] = {
+		{ 0x0290, 0x00000001 },
+		{ 0x02a0, 0x0000fe01 },
+		{ 0x0304, 0x00000000 },
+		{ 0x00f4, 0x01004c20 },
+		{ 0x00f8, 0x014000aa },
+		{ 0x00e0, 0x00000140 },
+		{ 0x00e4, 0x00081450 },
+		{ 0x00e8, 0x00010000 },
+		{ 0x0290, 0x00000004 },
+	};
+
+	static const struct reg_config dbsc_config8[] = {
+		{ 0x0014, 0x00000001 },
+		{ 0x0010, 0x00000001 },
+		{ 0x0280, 0x00000000 },
+	};
+
+	static const u32 dbsc3_0_base = DBSC3_0_BASE;
+	unsigned int i;
+
+	for (i = 0; i < ARRAY_SIZE(dbsc_config1); i++)
+		writel(dbsc_config1[i].val, dbsc3_0_base | dbsc_config1[i].off);
+
+	dbsc_wait(0x2a0);
+
+	for (i = 0; i < ARRAY_SIZE(dbsc_config2); i++)
+		writel(dbsc_config2[i].val, dbsc3_0_base | dbsc_config2[i].off);
+
+	for (i = 0; i < ARRAY_SIZE(dbsc_config4); i++)
+		writel(dbsc_config4[i].val, dbsc3_0_base | dbsc_config4[i].off);
+
+	dbsc_wait(0x240);
+
+	for (i = 0; i < ARRAY_SIZE(dbsc_config5); i++)
+		writel(dbsc_config5[i].val, dbsc3_0_base | dbsc_config5[i].off);
+
+	dbsc_wait(0x2a0);
+
+	for (i = 0; i < ARRAY_SIZE(dbsc_config6); i++)
+		writel(dbsc_config6[i].val, dbsc3_0_base | dbsc_config6[i].off);
+
+	dbsc_wait(0x2a0);
+
+	for (i = 0; i < ARRAY_SIZE(dbsc_config7); i++)
+		writel(dbsc_config7[i].val, dbsc3_0_base | dbsc_config7[i].off);
+
+	dbsc_wait(0x2a0);
+
+	for (i = 0; i < ARRAY_SIZE(dbsc_config8); i++)
+		writel(dbsc_config8[i].val, dbsc3_0_base | dbsc_config8[i].off);
+
+}
+
+static void spl_init_qspi(void)
+{
+	mstp_clrbits_le32(MSTPSR9, SMSTPCR9, QSPI_MSTP917);
+
+	static const u32 qspi_base = 0xe6b10000;
+
+	writeb(0x08, qspi_base + 0x00);
+	writeb(0x00, qspi_base + 0x01);
+	writeb(0x06, qspi_base + 0x02);
+	writeb(0x01, qspi_base + 0x0a);
+	writeb(0x00, qspi_base + 0x0b);
+	writeb(0x00, qspi_base + 0x0c);
+	writeb(0x00, qspi_base + 0x0d);
+	writeb(0x00, qspi_base + 0x0e);
+
+	writew(0xe080, qspi_base + 0x10);
+
+	writeb(0xc0, qspi_base + 0x18);
+	writeb(0x00, qspi_base + 0x18);
+	writeb(0x00, qspi_base + 0x08);
+	writeb(0x48, qspi_base + 0x00);
+}
+
+void board_init_f(ulong dummy)
+{
+	mstp_clrbits_le32(MSTPSR1, SMSTPCR1, TMU0_MSTP125);
+	mstp_clrbits_le32(MSTPSR7, SMSTPCR7, SCIF2_MSTP719);
+
+	/* Set SD1 to the 97.5MHz */
+	writel(SD_97500KHZ, SD1CKCR);
+
+	spl_init_sys();
+	spl_init_pfc();
+	spl_init_gpio();
+	spl_init_lbsc();
+	spl_init_dbsc();
+	spl_init_qspi();
+}
+
+void spl_board_init(void)
+{
+	/* UART clocks enabled and gd valid - init serial console */
+	preloader_console_init();
+}
+
+void board_boot_order(u32 *spl_boot_list)
+{
+	const u32 jtag_magic = 0x1337c0de;
+	const u32 load_magic = 0xb33fc0de;
+
+	/*
+	 * If JTAG probe sets special word at 0xe6300020, then it must
+	 * put U-Boot into RAM and SPL will start it from RAM.
+	 */
+	if (readl(CONFIG_SPL_TEXT_BASE + 0x20) == jtag_magic) {
+		printf("JTAG boot detected!\n");
+
+		while (readl(CONFIG_SPL_TEXT_BASE + 0x24) != load_magic)
+			;
+
+		spl_boot_list[0] = BOOT_DEVICE_RAM;
+		spl_boot_list[1] = BOOT_DEVICE_NONE;
+
+		return;
+	}
+
+	/* Boot from SPI NOR with YMODEM UART fallback. */
+	spl_boot_list[0] = BOOT_DEVICE_SPI;
+	spl_boot_list[1] = BOOT_DEVICE_UART;
+	spl_boot_list[2] = BOOT_DEVICE_NONE;
+}
+
+void reset_cpu(ulong addr)
+{
+}
diff --git a/configs/alt_defconfig b/configs/alt_defconfig
index 19ae070895..9867a5f4d5 100644
--- a/configs/alt_defconfig
+++ b/configs/alt_defconfig
@@ -1,17 +1,37 @@
 CONFIG_ARM=y
+CONFIG_ENABLE_ARM_SOC_BOOT0_HOOK=y
+# CONFIG_SPL_USE_ARCH_MEMCPY is not set
+# CONFIG_SPL_USE_ARCH_MEMSET is not set
 CONFIG_ARCH_RMOBILE=y
-CONFIG_SYS_TEXT_BASE=0xE6304000
-CONFIG_SYS_MALLOC_F_LEN=0x2000
+CONFIG_SYS_TEXT_BASE=0x50000000
+CONFIG_SPL_LIBCOMMON_SUPPORT=y
+CONFIG_SPL_LIBGENERIC_SUPPORT=y
+CONFIG_SYS_MALLOC_F_LEN=0x8000
 CONFIG_R8A7794=y
 CONFIG_TARGET_ALT=y
+CONFIG_SPL_SERIAL_SUPPORT=y
+CONFIG_SPL_SPI_FLASH_SUPPORT=y
+CONFIG_SPL_SPI_SUPPORT=y
+CONFIG_SPL=y
 CONFIG_DEFAULT_DEVICE_TREE="r8a7794-alt-u-boot"
+CONFIG_SPL_SYS_MALLOC_F_LEN=0x2000
+CONFIG_FIT=y
 CONFIG_BOOTDELAY=3
 CONFIG_VERSION_VARIABLE=y
+CONFIG_SPL_BOARD_INIT=y
+CONFIG_SPL_SYS_MALLOC_SIMPLE=y
+CONFIG_SPL_RAM_SUPPORT=y
+CONFIG_SPL_RAM_DEVICE=y
+CONFIG_SPL_SPI_LOAD=y
+CONFIG_SPL_YMODEM_SUPPORT=y
+CONFIG_HUSH_PARSER=y
 CONFIG_CMD_BOOTZ=y
 # CONFIG_CMD_IMI is not set
 # CONFIG_CMD_XIMG is not set
+CONFIG_CMD_GPIO=y
 CONFIG_CMD_I2C=y
 CONFIG_CMD_MMC=y
+CONFIG_CMD_PCI=y
 CONFIG_CMD_SDRAM=y
 CONFIG_CMD_SF=y
 CONFIG_CMD_SPI=y
@@ -19,22 +39,43 @@ CONFIG_CMD_USB=y
 CONFIG_CMD_DHCP=y
 CONFIG_CMD_MII=y
 CONFIG_CMD_PING=y
+CONFIG_CMD_CACHE=y
+CONFIG_CMD_TIME=y
 CONFIG_CMD_EXT2=y
 CONFIG_CMD_EXT4=y
 CONFIG_CMD_EXT4_WRITE=y
 CONFIG_CMD_FAT=y
 CONFIG_OF_CONTROL=y
+CONFIG_OF_EMBED=y
 CONFIG_ENV_IS_IN_SPI_FLASH=y
+CONFIG_CLK=y
+CONFIG_CLK_RENESAS=y
+CONFIG_DM_GPIO=y
+CONFIG_RCAR_GPIO=y
+CONFIG_DM_I2C=y
+CONFIG_SYS_I2C_RCAR_IIC=y
+CONFIG_DM_MMC=y
 CONFIG_SH_MMCIF=y
+CONFIG_RENESAS_SDHI=y
 CONFIG_SPI_FLASH=y
 CONFIG_SPI_FLASH_BAR=y
 CONFIG_SPI_FLASH_SPANSION=y
 CONFIG_PHY_MICREL=y
-CONFIG_NETDEVICES=y
+CONFIG_DM_ETH=y
 CONFIG_SH_ETHER=y
-CONFIG_BAUDRATE=38400
+CONFIG_PCI=y
+CONFIG_DM_PCI=y
+CONFIG_PCI_RCAR_GEN2=y
+CONFIG_PINCTRL=y
+CONFIG_PINCONF=y
+CONFIG_PINCTRL_PFC=y
+CONFIG_DM_REGULATOR=y
+CONFIG_DM_REGULATOR_FIXED=y
+CONFIG_DM_REGULATOR_GPIO=y
 CONFIG_SCIF_CONSOLE=y
 CONFIG_SH_QSPI=y
 CONFIG_USB=y
+CONFIG_DM_USB=y
 CONFIG_USB_EHCI_HCD=y
+CONFIG_USB_EHCI_PCI=y
 CONFIG_USB_STORAGE=y
diff --git a/include/configs/alt.h b/include/configs/alt.h
index d6236870b9..619660b2bd 100644
--- a/include/configs/alt.h
+++ b/include/configs/alt.h
@@ -15,12 +15,8 @@
 
 #include "rcar-gen2-common.h"
 
-#if defined(CONFIG_ARCH_RMOBILE_EXTRAM_BOOT)
-#define CONFIG_SYS_INIT_SP_ADDR		0x7003FFFC
-#else
-#define CONFIG_SYS_INIT_SP_ADDR		0xE633FFFC
-#endif
-#define STACK_AREA_SIZE			0xC000
+#define CONFIG_SYS_INIT_SP_ADDR		0x4f000000
+#define STACK_AREA_SIZE			0x00100000
 #define LOW_LEVEL_MERAM_STACK \
 		(CONFIG_SYS_INIT_SP_ADDR + STACK_AREA_SIZE - 4)
 
@@ -41,52 +37,29 @@
 #define CONFIG_SH_ETHER_PHY_MODE PHY_INTERFACE_MODE_RMII
 #define CONFIG_SH_ETHER_CACHE_WRITEBACK
 #define CONFIG_SH_ETHER_CACHE_INVALIDATE
-#define CONFIG_SH_ETHER_ALIGNE_SIZE 64
+#define CONFIG_SH_ETHER_ALIGNE_SIZE	64
 #define CONFIG_BITBANGMII
 #define CONFIG_BITBANGMII_MULTI
 
 /* Board Clock */
-#define RMOBILE_XTAL_CLK        20000000u
-#define CONFIG_SYS_CLK_FREQ     RMOBILE_XTAL_CLK
-#define CONFIG_SH_TMU_CLK_FREQ  (CONFIG_SYS_CLK_FREQ / 2) /* EXT / 2 */
-#define CONFIG_PLL1_CLK_FREQ    (CONFIG_SYS_CLK_FREQ * 156 / 2)
-#define CONFIG_P_CLK_FREQ	(CONFIG_PLL1_CLK_FREQ / 24)
-
-#define CONFIG_SYS_TMU_CLK_DIV  4
-
-/* i2c */
-#define CONFIG_SYS_I2C
-#define CONFIG_SYS_I2C_SH
-#define CONFIG_SYS_I2C_SLAVE		0x7F
-#define CONFIG_SYS_I2C_SH_NUM_CONTROLLERS       3
-#define CONFIG_SYS_I2C_SH_SPEED0	400000
-#define CONFIG_SYS_I2C_SH_SPEED1	400000
-#define CONFIG_SYS_I2C_SH_SPEED2	400000
-#define CONFIG_SH_I2C_DATA_HIGH		4
-#define CONFIG_SH_I2C_DATA_LOW		5
-#define CONFIG_SH_I2C_CLOCK		10000000
-
-#define CONFIG_SYS_I2C_POWERIC_ADDR 0x58 /* da9063 */
-
-/* USB */
-#define CONFIG_USB_EHCI_RMOBILE
-#define CONFIG_USB_MAX_CONTROLLER_COUNT	2
-
-/* MMCIF */
-#define CONFIG_SH_MMCIF_ADDR		0xee200000
-#define CONFIG_SH_MMCIF_CLK		48000000
-
-/* Module stop status bits */
-/* INTC-RT */
-#define CONFIG_SMSTP0_ENA	0x00400000
-/* MSIF */
-#define CONFIG_SMSTP2_ENA	0x00002000
-/* INTC-SYS, IRQC */
-#define CONFIG_SMSTP4_ENA	0x00000180
-/* SCIF2 */
-#define CONFIG_SMSTP7_ENA	0x00080000
-
-/* SDHI */
-#define CONFIG_SH_SDHI_FREQ		97500000
+#define RMOBILE_XTAL_CLK	20000000u
+#define CONFIG_SYS_CLK_FREQ	RMOBILE_XTAL_CLK
+#define CONFIG_SH_TMU_CLK_FREQ	(CONFIG_SYS_CLK_FREQ / 2)
+
+#define CONFIG_SYS_TMU_CLK_DIV	4
+
+#define CONFIG_EXTRA_ENV_SETTINGS	\
+	"fdt_high=0xffffffff\0"		\
+	"initrd_high=0xffffffff\0"
+
+/* SPL support */
+#define CONFIG_SPL_TEXT_BASE		0xe6300000
+#define CONFIG_SPL_STACK		0xe6340000
+#define CONFIG_SPL_MAX_SIZE		0x4000
+#define CONFIG_SYS_SPI_U_BOOT_OFFS	0x140000
+#ifdef CONFIG_SPL_BUILD
+#define CONFIG_CONS_SCIF2
+#define CONFIG_SH_SCIF_CLK_FREQ		65000000
+#endif
 
 #endif /* __ALT_H */