imx: imxrt1050-evk: Add support for the NXP i.MXRT1050-EVK

This commit adds board support for i.MXRT1050-EVK from NXP. This board
is an evaluation kit provided by NXP for i.MXRT105x processor family.

More information about this board can be found here:
https://www.nxp.com/design/development-boards/i.mx-evaluation-and-development-boards/i.mx-rt1050-evaluation-kit:MIMXRT1050-EVK

The initial supported/tested devices include:
- Debug serial
- SD

Signed-off-by: Giulio Benetti <giulio.benetti@benettiengineering.com>

6 files changed, 182 insertions, 0 deletions

diff --git a/board/freescale/imxrt1050-evk/Kconfig b/board/freescale/imxrt1050-evk/Kconfig
new file mode 100644
index 0000000000..79e6e4524a
--- /dev/null
+++ b/board/freescale/imxrt1050-evk/Kconfig
@@ -0,0 +1,22 @@
+if TARGET_IMXRT1050_EVK
+
+config SYS_BOARD
+	string
+	default "imxrt1050-evk"
+
+config SYS_VENDOR
+	string
+	default "freescale"
+
+config SYS_SOC
+	string
+	default "imxrt1050"
+
+config SYS_CONFIG_NAME
+	string
+	default "imxrt1050-evk"
+
+config IMX_CONFIG
+	default "board/freescale/imxrt1050-evk/imximage.cfg"
+
+endif
diff --git a/board/freescale/imxrt1050-evk/MAINTAINERS b/board/freescale/imxrt1050-evk/MAINTAINERS
new file mode 100644
index 0000000000..a872855452
--- /dev/null
+++ b/board/freescale/imxrt1050-evk/MAINTAINERS
@@ -0,0 +1,6 @@
+IMXRT1050 EVALUATION KIT
+M:	Giulio Benetti <giulio.benetti@benettiengineering.com>
+S:	Maintained
+F:	board/freescale/imxrt1050-evk
+F:	include/configs/imxrt1050-evk.h
+F:	configs/imxrt1050-evk_defconfig
diff --git a/board/freescale/imxrt1050-evk/Makefile b/board/freescale/imxrt1050-evk/Makefile
new file mode 100644
index 0000000000..0e984d1d7a
--- /dev/null
+++ b/board/freescale/imxrt1050-evk/Makefile
@@ -0,0 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0+
+#
+# Copyright (C) 2019
+# Author(s): Giulio Benetti <giulio.benetti@benettiengineering.com>
+
+obj-y	:= imxrt1050-evk.o
diff --git a/board/freescale/imxrt1050-evk/README b/board/freescale/imxrt1050-evk/README
new file mode 100644
index 0000000000..f7e2894025
--- /dev/null
+++ b/board/freescale/imxrt1050-evk/README
@@ -0,0 +1,31 @@
+How to use U-Boot on NXP i.MXRT1050 EVK
+-----------------------------------------------
+
+- Build U-Boot for i.MXRT1050 EVK:
+
+$ make mrproper
+$ make imxrt1050-evk_defconfig
+$ make
+
+This will generate the SPL image called SPL and the u-boot.img.
+
+- Flash the SPL image into the micro SD card:
+
+sudo dd if=SPL of=/dev/mmcblk0 bs=1k seek=1; sync
+
+- Flash the u-boot.img image into the micro SD card:
+
+sudo dd if=u-boot.img of=/dev/sdb bs=1k seek=128; sync
+
+- Jumper settings:
+
+SW7: 1 0 1 0
+
+where 0 means bottom position and 1 means top position (from the
+switch label numbers reference).
+
+- Connect the USB cable between the EVK and the PC for the console.
+(The USB console connector is the one close the ethernet connector)
+
+- Insert the micro SD card in the board, power it up and U-Boot messages should
+come up.
diff --git a/board/freescale/imxrt1050-evk/imximage.cfg b/board/freescale/imxrt1050-evk/imximage.cfg
new file mode 100644
index 0000000000..cf1665be61
--- /dev/null
+++ b/board/freescale/imxrt1050-evk/imximage.cfg
@@ -0,0 +1,36 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (C) 2019
+ * Author(s): Giulio Benetti <giulio.benetti@benettiengineering.com>
+ */
+
+#define __ASSEMBLY__
+#include <config.h>
+
+/* image version */
+
+IMAGE_VERSION 2
+
+/*
+ * Boot Device : one of
+ * spi/sd/nand/onenand, qspi/nor
+ */
+
+BOOT_FROM	sd
+
+/*
+ * Device Configuration Data (DCD)
+ *
+ * Each entry must have the format:
+ * Addr-type           Address        Value
+ *
+ * where:
+ *	Addr-type register length (1,2 or 4 bytes)
+ *	Address	  absolute address of the register
+ *	value	  value to be stored in the register
+ */
+
+/* Set all FlexRAM as OCRAM(01b) */
+DATA 4 0x400AC044 0x55555555
+/* Use FLEXRAM_BANK_CFG to config FlexRAM */
+SET_BIT 4 0x400AC040 0x4
diff --git a/board/freescale/imxrt1050-evk/imxrt1050-evk.c b/board/freescale/imxrt1050-evk/imxrt1050-evk.c
new file mode 100644
index 0000000000..bda03b5ea5
--- /dev/null
+++ b/board/freescale/imxrt1050-evk/imxrt1050-evk.c
@@ -0,0 +1,81 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2019
+ * Author(s): Giulio Benetti <giulio.benetti@benettiengineering.com>
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <ram.h>
+#include <spl.h>
+#include <asm/io.h>
+#include <asm/armv7m.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+int dram_init(void)
+{
+#ifndef CONFIG_SUPPORT_SPL
+	int rv;
+	struct udevice *dev;
+
+	rv = uclass_get_device(UCLASS_RAM, 0, &dev);
+	if (rv) {
+		debug("DRAM init failed: %d\n", rv);
+		return rv;
+	}
+
+#endif
+	return fdtdec_setup_mem_size_base();
+}
+
+int dram_init_banksize(void)
+{
+	return fdtdec_setup_memory_banksize();
+}
+
+#ifdef CONFIG_SPL_BUILD
+#ifdef CONFIG_SPL_OS_BOOT
+int spl_start_uboot(void)
+{
+	debug("SPL: booting kernel\n");
+	/* break into full u-boot on 'c' */
+	return serial_tstc() && serial_getc() == 'c';
+}
+#endif
+
+int spl_dram_init(void)
+{
+	struct udevice *dev;
+	int rv;
+
+	rv = uclass_get_device(UCLASS_RAM, 0, &dev);
+	if (rv)
+		debug("DRAM init failed: %d\n", rv);
+	return rv;
+}
+
+void spl_board_init(void)
+{
+	spl_dram_init();
+	preloader_console_init();
+	arch_cpu_init(); /* to configure mpu for sdram rw permissions */
+}
+
+u32 spl_boot_device(void)
+{
+	return BOOT_DEVICE_MMC1;
+}
+#endif
+
+u32 get_board_rev(void)
+{
+	return 0;
+}
+
+int board_init(void)
+{
+	gd->bd->bi_boot_params = gd->bd->bi_dram[0].start + 0x100;
+
+	return 0;
+}