spl: socfpga: Implement fpga bitstream loading with socfpga loadfs

Add support for loading FPGA bitstream to get DDR up running before
U-Boot is loaded into DDR. Boot device initialization, generic firmware
loader and SPL FAT support are required for this whole mechanism to work.

Signed-off-by: Tien Fong Chee <tien.fong.chee@intel.com>

1 files changed, 30 insertions, 1 deletions

diff --git a/arch/arm/mach-socfpga/spl_a10.c b/arch/arm/mach-socfpga/spl_a10.c
index c8e73d47c0..b466307f98 100644
--- a/arch/arm/mach-socfpga/spl_a10.c
+++ b/arch/arm/mach-socfpga/spl_a10.c
@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0+
 /*
- *  Copyright (C) 2012 Altera Corporation <www.altera.com>
+ *  Copyright (C) 2012-2019 Altera Corporation <www.altera.com>
  */
 
 #include <common.h>
@@ -23,6 +23,11 @@
 #include <fdtdec.h>
 #include <watchdog.h>
 #include <asm/arch/pinmux.h>
+#include <asm/arch/fpga_manager.h>
+#include <mmc.h>
+#include <memalign.h>
+
+#define FPGA_BUFSIZ	16 * 1024
 
 DECLARE_GLOBAL_DATA_PTR;
 
@@ -68,11 +73,35 @@ u32 spl_boot_mode(const u32 boot_device)
 
 void spl_board_init(void)
 {
+	ALLOC_CACHE_ALIGN_BUFFER(char, buf, FPGA_BUFSIZ);
+
 	/* enable console uart printing */
 	preloader_console_init();
 	WATCHDOG_RESET();
 
 	arch_early_init_r();
+
+	/* If the full FPGA is already loaded, ie.from EPCQ, config fpga pins */
+	if (is_fpgamgr_user_mode()) {
+		int ret = config_pins(gd->fdt_blob, "shared");
+
+		if (ret)
+			return;
+
+		ret = config_pins(gd->fdt_blob, "fpga");
+		if (ret)
+			return;
+	} else if (!is_fpgamgr_early_user_mode()) {
+		/* Program IOSSM(early IO release) or full FPGA */
+		fpgamgr_program(buf, FPGA_BUFSIZ, 0);
+	}
+
+	/* If the IOSSM/full FPGA is already loaded, start DDR */
+	if (is_fpgamgr_early_user_mode() || is_fpgamgr_user_mode())
+		ddr_calibration_sequence();
+
+	if (!is_fpgamgr_user_mode())
+		fpgamgr_program(buf, FPGA_BUFSIZ, 0);
 }
 
 void board_init_f(ulong dummy)