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

Chee Tien Fong
2016-12-28T06:34:40Z

From: Tien Fong Chee <tien.fong.chee@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@intel.com>
Cc: Marek Vasut <marex@denx.de>
Cc: Dinh Nguyen <dinguyen@kernel.org>
Cc: Chin Liang See <chin.liang.see@intel.com>
Cc: Tien Fong <skywindctf@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