arm64: versal-net: Add support for Versal NET platform

Versal NET platform is based on Versal chip which is reusing a lot of IPs.
For more information about new IPs please take a look at DT which describe
currently supported devices.
The patch is adding architecture and board support with soc detection
algorithm. Generic setting should be very similar to Versal but it will
likely diverge in longer run.

Signed-off-by: Michal Simek <michal.simek@amd.com>
Link: https://lore.kernel.org/r/320206853dc370ce290a4e7b6d0bb26b05206021.1663589964.git.michal.simek@amd.com

5 files changed, 199 insertions, 3 deletions

diff --git a/board/xilinx/Kconfig b/board/xilinx/Kconfig
index 1788066173..746a2332ad 100644
--- a/board/xilinx/Kconfig
+++ b/board/xilinx/Kconfig
@@ -42,7 +42,7 @@ endif
 
 config XILINX_OF_BOARD_DTB_ADDR
 	hex "Default DTB pickup address"
-	default 0x1000 if ARCH_VERSAL
+	default 0x1000 if ARCH_VERSAL || ARCH_VERSAL_NET
 	default 0x8000 if MICROBLAZE
 	default 0x100000 if ARCH_ZYNQ || ARCH_ZYNQMP
 	depends on OF_BOARD || OF_SEPARATE
@@ -51,10 +51,10 @@ config XILINX_OF_BOARD_DTB_ADDR
 
 config BOOT_SCRIPT_OFFSET
 	hex "Boot script offset"
-	depends on ARCH_ZYNQ || ARCH_ZYNQMP || ARCH_VERSAL || MICROBLAZE
+	depends on ARCH_ZYNQ || ARCH_ZYNQMP || ARCH_VERSAL || ARCH_VERSAL_NET || MICROBLAZE
 	default 0xFC0000 if ARCH_ZYNQ || MICROBLAZE
 	default 0x3E80000 if ARCH_ZYNQMP
-	default 0x7F80000 if ARCH_VERSAL
+	default 0x7F80000 if ARCH_VERSAL || ARCH_VERSAL_NET
 	help
 	   Specifies distro boot script offset in NAND/QSPI/NOR flash.
 
diff --git a/board/xilinx/versal-net/Kconfig b/board/xilinx/versal-net/Kconfig
new file mode 100644
index 0000000000..8f94d2bb39
--- /dev/null
+++ b/board/xilinx/versal-net/Kconfig
@@ -0,0 +1,9 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Copyright (C) 2020 - 2022, Xilinx, Inc.
+# Copyright (C) 2022, Advanced Micro Devices, Inc.
+#
+
+if ARCH_VERSAL_NET
+
+endif
diff --git a/board/xilinx/versal-net/MAINTAINERS b/board/xilinx/versal-net/MAINTAINERS
new file mode 100644
index 0000000000..50120a88d6
--- /dev/null
+++ b/board/xilinx/versal-net/MAINTAINERS
@@ -0,0 +1,8 @@
+XILINX_VERSAL_NET BOARDS
+M:	Michal Simek <michal.simek@amd.com>
+S:	Maintained
+T:	git https://gitlab.denx.de/u-boot/custodians/u-boot-microblaze.git
+F:	arch/arm/dts/versal-net*
+F:	board/xilinx/versal-net/
+F:	include/configs/xilinx_versal_net*
+F:	configs/xilinx_versal_net*
diff --git a/board/xilinx/versal-net/Makefile b/board/xilinx/versal-net/Makefile
new file mode 100644
index 0000000000..2008d4e231
--- /dev/null
+++ b/board/xilinx/versal-net/Makefile
@@ -0,0 +1,9 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Copyright (C) 2021 - 2022, Xilinx, Inc.
+# Copyright (C) 2022, Advanced Micro Devices, Inc.
+#
+# Michal Simek <michal.simek@amd.com>
+#
+
+obj-y	:= board.o
diff --git a/board/xilinx/versal-net/board.c b/board/xilinx/versal-net/board.c
new file mode 100644
index 0000000000..760031927f
--- /dev/null
+++ b/board/xilinx/versal-net/board.c
@@ -0,0 +1,170 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2021 - 2022, Xilinx, Inc.
+ * Copyright (C) 2022, Advanced Micro Devices, Inc.
+ *
+ * Michal Simek <michal.simek@amd.com>
+ */
+
+#include <common.h>
+#include <cpu_func.h>
+#include <fdtdec.h>
+#include <init.h>
+#include <log.h>
+#include <malloc.h>
+#include <time.h>
+#include <asm/cache.h>
+#include <asm/global_data.h>
+#include <asm/io.h>
+#include <asm/arch/hardware.h>
+#include <asm/arch/sys_proto.h>
+#include <dm/device.h>
+#include <dm/uclass.h>
+#include "../common/board.h"
+
+#include <linux/bitfield.h>
+#include <debug_uart.h>
+#include <generated/dt.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+int board_init(void)
+{
+	printf("EL Level:\tEL%d\n", current_el());
+
+	return 0;
+}
+
+static u32 platform_id, platform_version;
+
+char *soc_name_decode(void)
+{
+	char *name, *platform_name;
+
+	switch (platform_id) {
+	case VERSAL_NET_SPP:
+		platform_name = "ipp";
+		break;
+	case VERSAL_NET_EMU:
+		platform_name = "emu";
+		break;
+	case VERSAL_NET_QEMU:
+		platform_name = "qemu";
+		break;
+	default:
+		return NULL;
+	}
+
+	/*
+	 * --rev. are 6 chars
+	 * max platform name is qemu which is 4 chars
+	 * platform version number are 1+1
+	 * Plus 1 char for \n
+	 */
+	name = calloc(1, strlen(CONFIG_SYS_BOARD) + 13);
+	if (!name)
+		return NULL;
+
+	sprintf(name, "%s-%s-rev%d.%d", CONFIG_SYS_BOARD,
+		platform_name, platform_version / 10,
+		platform_version % 10);
+
+	return name;
+}
+
+bool soc_detection(void)
+{
+	u32 version;
+
+	version = readl(PMC_TAP_VERSION);
+	platform_id = FIELD_GET(PLATFORM_MASK, version);
+
+	debug("idcode %x, version %x, usercode %x\n",
+	      readl(PMC_TAP_IDCODE), version,
+	      readl(PMC_TAP_USERCODE));
+
+	debug("pmc_ver %lx, ps version %lx, rtl version %lx\n",
+	      FIELD_GET(PMC_VERSION_MASK, version),
+	      FIELD_GET(PS_VERSION_MASK, version),
+	      FIELD_GET(RTL_VERSION_MASK, version));
+
+	platform_version = FIELD_GET(PLATFORM_VERSION_MASK, version);
+
+	if (platform_id == VERSAL_NET_SPP ||
+	    platform_id == VERSAL_NET_EMU) {
+		/*
+		 * 9 is diff for
+		 * 0 means 0.9 version
+		 * 1 means 1.0 version
+		 * 2 means 1.1 version
+		 * etc,
+		 */
+		platform_version += 9;
+	}
+
+	debug("Platform id: %d version: %d.%d\n", platform_id,
+	      platform_version / 10, platform_version % 10);
+
+	return true;
+}
+
+int board_early_init_f(void)
+{
+	if (IS_ENABLED(CONFIG_DEBUG_UART)) {
+		/* Uart debug for sure */
+		debug_uart_init();
+		puts("Debug uart enabled\n"); /* or printch() */
+	}
+
+	return 0;
+}
+
+int board_early_init_r(void)
+{
+	return 0;
+}
+
+int board_late_init(void)
+{
+	if (!(gd->flags & GD_FLG_ENV_DEFAULT)) {
+		debug("Saved variables - Skipping\n");
+		return 0;
+	}
+
+	if (!CONFIG_IS_ENABLED(ENV_VARS_UBOOT_RUNTIME_CONFIG))
+		return 0;
+
+	return board_late_init_xilinx();
+}
+
+int dram_init_banksize(void)
+{
+	int ret;
+
+	ret = fdtdec_setup_memory_banksize();
+	if (ret)
+		return ret;
+
+	mem_map_fill();
+
+	return 0;
+}
+
+int dram_init(void)
+{
+	int ret;
+
+	if (CONFIG_IS_ENABLED(SYS_MEM_RSVD_FOR_MMU))
+		ret = fdtdec_setup_mem_size_base();
+	else
+		ret = fdtdec_setup_mem_size_base_lowest();
+
+	if (ret)
+		return -EINVAL;
+
+	return 0;
+}
+
+void reset_cpu(void)
+{
+}