[U-Boot] [PATCH v2 29/30] arm: socfpga: arria10: Added Arria10 critical HW initialization to spl

[Chee Tien Fong]

From: Tien Fong Chee <tien.fong.chee at intel.com>

This patch adding the Arria10 critical hardware initialization before
enabling console print out in spl.

Signed-off-by: Tien Fong Chee <tien.fong.chee at intel.com>
Cc: Marek Vasut <marex at denx.de>
Cc: Dinh Nguyen <dinguyen at kernel.org>
Cc: Chin Liang See <chin.liang.see at intel.com>
Cc: Tien Fong <skywindctf at gmail.com>
---
Changes for V2
- Release UART from reset before enalbing console, and reverting license
  changes.
---
 arch/arm/mach-socfpga/spl.c | 84 +++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 82 insertions(+), 2 deletions(-)

diff --git a/arch/arm/mach-socfpga/spl.c b/arch/arm/mach-socfpga/spl.c
index fec4c7a..9e27f82 100644
--- a/arch/arm/mach-socfpga/spl.c
+++ b/arch/arm/mach-socfpga/spl.c
@@ -1,5 +1,5 @@
 /*
- *  Copyright (C) 2012 Altera Corporation <www.altera.com>
+ *  Copyright (C) 2012-2016 Altera Corporation <www.altera.com>
  *
  * SPDX-License-Identifier:	GPL-2.0+
  */
@@ -19,22 +19,32 @@
 #include <asm/arch/sdram.h>
 #include <asm/arch/scu.h>
 #include <asm/arch/nic301.h>
+#include <asm/sections.h>
+#include <watchdog.h>
+#include <fdtdec.h>
+#if defined(CONFIG_TARGET_SOCFPGA_ARRIA10)
+#include <asm/arch/pinmux.h>
+#endif
 
 DECLARE_GLOBAL_DATA_PTR;
 
+#if defined(CONFIG_TARGET_SOCFPGA_GEN5)
 static struct pl310_regs *const pl310 =
 	(struct pl310_regs *)CONFIG_SYS_PL310_BASE;
 static struct scu_registers *scu_regs =
 	(struct scu_registers *)SOCFPGA_MPUSCU_ADDRESS;
 static struct nic301_registers *nic301_regs =
 	(struct nic301_registers *)SOCFPGA_L3REGS_ADDRESS;
-static struct socfpga_system_manager *sysmgr_regs =
+#endif
+
+static const struct socfpga_system_manager *sysmgr_regs =
 	(struct socfpga_system_manager *)SOCFPGA_SYSMGR_ADDRESS;
 
 u32 spl_boot_device(void)
 {
 	const u32 bsel = readl(&sysmgr_regs->bootinfo);
 
+#if defined(CONFIG_TARGET_SOCFPGA_GEN5)
 	switch (bsel & 0x7) {
 	case 0x1:	/* FPGA (HPS2FPGA Bridge) */
 		return BOOT_DEVICE_RAM;
@@ -55,6 +65,24 @@ u32 spl_boot_device(void)
 		printf("Invalid boot device (bsel=%08x)!\n", bsel);
 		hang();
 	}
+#elif defined(CONFIG_TARGET_SOCFPGA_ARRIA10)
+	switch ((bsel>>12) & 0x7) {
+	case 0x1:	/* FPGA (HPS2FPGA Bridge) */
+		return BOOT_DEVICE_RAM;
+	case 0x2:	/* NAND Flash (1.8V) */
+	case 0x3:	/* NAND Flash (3.0V) */
+		return BOOT_DEVICE_NAND;
+	case 0x4:	/* SD/MMC External Transceiver (1.8V) */
+	case 0x5:	/* SD/MMC Internal Transceiver (3.0V) */
+		return BOOT_DEVICE_MMC1;
+	case 0x6:	/* QSPI Flash (1.8V) */
+	case 0x7:	/* QSPI Flash (3.0V) */
+		return BOOT_DEVICE_SPI;
+	default:
+		printf("Invalid boot device (bsel=%08x)!\n", bsel);
+		hang();
+	}
+#endif
 }
 
 #ifdef CONFIG_SPL_MMC_SUPPORT
@@ -68,6 +96,7 @@ u32 spl_boot_mode(const u32 boot_device)
 }
 #endif
 
+#if defined(CONFIG_TARGET_SOCFPGA_GEN5)
 static void socfpga_nic301_slave_ns(void)
 {
 	writel(0x1, &nic301_regs->lwhps2fpgaregs);
@@ -182,3 +211,54 @@ void board_init_f(ulong dummy)
 	/* Configure simple malloc base pointer into RAM. */
 	gd->malloc_base = CONFIG_SYS_TEXT_BASE + (1024 * 1024);
 }
+#elif defined(CONFIG_TARGET_SOCFPGA_ARRIA10)
+void board_init_f(ulong dummy)
+{
+	memset(__bss_start, 0, __bss_end - __bss_start);
+	/*
+	 * Configure Clock Manager to use intosc clock instead external osc to
+	 * ensure success watchdog operation. We do it as early as possible.
+	 */
+	cm_use_intosc();
+
+	watchdog_disable();
+
+	arch_early_init_r();
+
+#ifdef CONFIG_HW_WATCHDOG
+	/* release osc1 watchdog timer 0 from reset */
+	reset_deassert_osc1wd0();
+
+	/* reconfigure and enable the watchdog */
+	hw_watchdog_init();
+	WATCHDOG_RESET();
+#endif /* CONFIG_HW_WATCHDOG */
+
+#ifdef CONFIG_OF_CONTROL
+	/* We need to access to FDT as this stage */
+	/* FDT is at end of image */
+	gd->fdt_blob = (void *)(__bss_end);
+	/* Check whether we have a valid FDT or not. */
+	if (fdtdec_prepare_fdt()) {
+		panic("** CONFIG_OF_CONTROL defined but no FDT - please see "
+			"doc/README.fdt-control");
+	}
+#endif /* CONFIG_OF_CONTROL */
+
+	/* Initialize the timer */
+	timer_init();
+
+	/* configuring the clock based on handoff */
+	cm_basic_init(gd->fdt_blob);
+	WATCHDOG_RESET();
+
+	config_dedicated_pins(gd->fdt_blob);
+	WATCHDOG_RESET();
+
+	/* Release UART from reset */
+	reset_deassert_uart();
+
+	/* enable console uart printing */
+	preloader_console_init();
+}
+#endif
-- 
2.2.2