Add some initial imx board support, needs cleanup

Makefile

@@ -1,13 +1,28 @@
-include lib/tinyusb/tools/top.mk
-include lib/tinyusb/examples/make.mk
+TINYUSB_PATH ?= lib/tinyusb
+
+# Force using the local board directory
+TOP := $(shell realpath `pwd`)
+include $(TINYUSB_PATH)/examples/make.mk
 
 INC += \
+	hw \
+	hw/bsp \
+	hw/bsp/$(BOARD) \
 	src \
-	$(TOP)/hw
+	lib/tinyusb/tools \
+	_build/build-$(BOARD)
 
-SRC_C += \
+SRC_C = \
 	$(addprefix $(CURRENT_PATH)/, $(wildcard src/*.c))
 
 CFLAGS += -Wno-unused-parameter
 
-include lib/tinyusb/examples/rules.mk
+UF2_VERSION_BASE = $(shell git describe --always --tags)
+$(BUILD)/uf2_version.h: Makefile
+	@echo "#define UF2_VERSION_BASE \"$(UF2_VERSION_BASE)\""> $@
+
+OBJ += $(BUILD)/uf2_version.h
+
+include $(TOP)/hw/chip/$(CHIP_FAMILY)/$(CHIP_VARIANT).mk
+include $(TINYUSB_PATH)/tools/top.mk
+include $(TINYUSB_PATH)/examples/rules.mk

hw/bsp/bsp.h

@@ -0,0 +1,42 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2020, Artur Pacholec
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ */
+
+#ifndef _BOARD_H_
+#define _BOARD_H_
+
+#include <stdint.h>
+#include <stdbool.h>
+
+#include "board_config.h"
+
+void board_flash_flush(void);
+uint32_t board_flash_read_blocks(uint8_t *dest, uint32_t block, uint32_t num_blocks);
+uint32_t board_flash_write_blocks(const uint8_t *src, uint32_t lba, uint32_t num_blocks);
+uint32_t board_millis(void);
+void board_reset(void);
+void board_led_write(bool state);
+void board_init(void);
+
+#endif

hw/bsp/mimxrt1010_evk/board.mk

@@ -0,0 +1,2 @@
+CHIP_FAMILY = mimxrt10xx
+CHIP_VARIANT = MIMXRT1011DAE5A

hw/bsp/mimxrt1010_evk/board_config.h

@@ -0,0 +1,20 @@
+#ifndef _BOARD_CONFIG_H_
+#define _BOARD_CONFIG_H_
+
+#define VENDOR_NAME "NXP"
+#define PRODUCT_NAME "MIMXRT1010-EVK"
+#define VOLUME_LABEL "UF2BOOT"
+#define INDEX_URL ""
+#define BOARD_ID "MIMXRT1010-EVK"
+
+#define USB_VID 0x239A
+#define USB_PID 0x0077
+
+// The EVK uses 16MB Flash but that would force the MSC
+// drive to be larger than 65535 sectors and requires
+// additional modifications to the code, we'll take care
+// of that in the future. For now 8MB works.
+//#define BOARD_FLASH_SIZE 0x1000000
+#define BOARD_FLASH_SIZE 0x800000
+
+#endif

hw/chip/mimxrt10xx/MIMXRT1011DAE5A.mk

@@ -0,0 +1,12 @@
+MCU_DIR = hw/mcu/nxp/sdk/devices/MIMXRT1011
+
+include hw/chip/mimxrt10xx/family.mk
+
+CFLAGS += -DCPU_MIMXRT1011DAE5A
+
+SRC_C += $(MCU_DIR)/system_MIMXRT1011.c
+
+SRC_S += $(MCU_DIR)/gcc/startup_MIMXRT1011.S
+
+LD_FILE = ../../hw/chip/mimxrt10xx/MIMXRT1011xxxxx_flexspi_nor.ld
+

hw/chip/mimxrt10xx/MIMXRT1011xxxxx_flexspi_nor.ld

@@ -0,0 +1,115 @@
+ENTRY(Reset_Handler)
+
+_minimum_stack_size = 64K;
+_minimum_heap_size = 0;
+
+MEMORY
+{
+    FLASH_CONFIG (rx) : ORIGIN = 0x60000400, LENGTH = 3K
+    FLASH_IVT (rx)    : ORIGIN = 0x60001000, LENGTH = 4K
+    FLASH_ISR (rx)    : ORIGIN = 0x60002000, LENGTH = 1K
+    FLASH_TEXT (rx)   : ORIGIN = 0x60002400, LENGTH = 27K
+    RAM (rwx)         : ORIGIN = 0x00000000, LENGTH = 32K
+    OCRAM (rwx)       : ORIGIN = 0x20200000, LENGTH = 64K
+}
+
+__StackTop = ORIGIN(OCRAM) + LENGTH(OCRAM);
+_bootloader_dbl_tap = ORIGIN(RAM) + LENGTH(RAM) - 4;
+__RAM_VECTOR_TABLE_SIZE_BYTES = 0;
+
+SECTIONS
+{
+    .flash_config :
+    {
+        . = ALIGN(4);
+        KEEP(* (.boot_hdr.conf))
+        . = ALIGN(4);
+    } > FLASH_CONFIG
+
+    .ivt :
+    {
+        . = ALIGN(4);
+        KEEP(* (.boot_hdr.ivt))
+        KEEP(* (.boot_hdr.boot_data))
+        KEEP(* (.boot_hdr.dcd_data))
+        . = ALIGN(4);
+    } > FLASH_IVT
+
+    .interrupts :
+    {
+        __VECTOR_TABLE = .;
+        __VECTOR_RAM = .;
+
+        . = ALIGN(4);
+        KEEP(*(.isr_vector))         /* Startup code */
+        . = ALIGN(4);
+    } > FLASH_ISR
+
+    .text :
+    {
+        . = ALIGN(4);
+    *(EXCLUDE_FILE(
+        *flexspi_nor_flash_ops.o
+        *fsl_flexspi.o
+    ) .text*)                /* .text* sections (code) */
+        *(.rodata*)        /* .rodata* sections (constants, strings, etc.) */
+        . = ALIGN(4);
+    } > FLASH_TEXT
+
+    .ARM.exidx :
+    {
+        *(.ARM.exidx*)
+        *(.gnu.linkonce.armexidx.*)
+        _etext = .;        /* define a global symbol at end of code */
+        __etext = .;       /* define a global symbol at end of code */
+    } > FLASH_TEXT
+
+    /* used by the startup to initialize data */
+    _sidata = .;
+
+    .data : AT (_sidata)
+    {
+        . = ALIGN(4);
+        __data_start__ = .;     /* create a global symbol at data start */
+
+        *(.data*)               /* .data* sections */
+        *flexspi_nor_flash_ops.o(.text*)
+        *fsl_flexspi.o(.text*)
+        . = ALIGN(4);
+
+        __data_end__ = .;       /* define a global symbol at data end */
+    } > RAM
+
+    /* Uninitialized data section */
+    .bss :
+    {
+        . = ALIGN(4);
+        __bss_start__ = .;
+
+        *(.bss*)
+        *(COMMON)
+
+        . = ALIGN(4);
+        __bss_end__ = .;
+        PROVIDE(end = .);
+    } > RAM
+
+    .heap :
+    {
+        . = ALIGN(8);
+        _heap_start = .;    /* define a global symbol at heap start */
+
+        . += _minimum_heap_size;
+
+        __HeapLimit = .;
+    } > OCRAM
+
+    .stack :
+    {
+        . = ALIGN(8);
+        . += _minimum_stack_size;
+    } > OCRAM
+
+    .ARM.attributes 0 : { *(.ARM.attributes) }
+}
+