implement msc flash, seems to work

ports/nrf/Makefile

@@ -115,6 +115,7 @@ SRC_C += \
 	drivers/bluetooth/ble_uart.c \
 	boards/$(BOARD)/board.c \
 	nrfx/mdk/system_$(MCU_SUB_VARIANT).c \
+	nrfx/hal/nrf_nvmc.c \
 	device/$(MCU_VARIANT)/startup_$(MCU_SUB_VARIANT).c \
 	background.c \
 	lib/oofatfs/ff.c \
@@ -135,7 +136,6 @@ ifeq ($(MCU_SUB_VARIANT),nrf52840)
 SRC_C += \
 	usb/tusb_descriptors.c \
 	usb/usb_msc_flash.c \
-	usb/usb_cdc.c \
   lib/tinyusb/src/portable/nordic/nrf5x/dcd_nrf5x.c \
   lib/tinyusb/src/portable/nordic/nrf5x/hal_nrf5x.c \
   lib/tinyusb/src/common/tusb_fifo.c \

ports/nrf/usb/usb_cdc.c

@@ -1,53 +0,0 @@
-/**************************************************************************/
-/*!
-    @file     usb_cdc.c
-    @author   hathach (tinyusb.org)
-
-    @section LICENSE
-
-    Software License Agreement (BSD License)
-
-    Copyright (c) 2018, Adafruit Industries (adafruit.com)
-    All rights reserved.
-
-    Redistribution and use in source and binary forms, with or without
-    modification, are permitted provided that the following conditions are met:
-    1. Redistributions of source code must retain the above copyright
-    notice, this list of conditions and the following disclaimer.
-    2. Redistributions in binary form must reproduce the above copyright
-    notice, this list of conditions and the following disclaimer in the
-    documentation and/or other materials provided with the distribution.
-    3. Neither the name of the copyright holders nor the
-    names of its contributors may be used to endorse or promote products
-    derived from this software without specific prior written permission.
-
-    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ''AS IS'' AND ANY
-    EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
-    WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
-    DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE FOR ANY
-    DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
-    (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
-    LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
-    ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-    (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
-    SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-*/
-/**************************************************************************/
-
-#include "tusb.h"
-
-/*------------------------------------------------------------------*/
-/* MACRO TYPEDEF CONSTANT ENUM
- *------------------------------------------------------------------*/
-
-/*------------------------------------------------------------------*/
-/* VARIABLE DECLARATION
- *------------------------------------------------------------------*/
-
-/*------------------------------------------------------------------*/
-/* FUNCTION DECLARATION
- *------------------------------------------------------------------*/
-
-void tud_cdc_rx_cb(uint8_t port)
-{
-}

ports/nrf/usb/usb_msc_flash.c

@@ -37,16 +37,18 @@
 #ifdef NRF52840_XXAA
 
 #include "tusb.h"
-
+#include "nrf_nvmc.h"
-#if CFG_TUD_MSC
 
 /*------------------------------------------------------------------*/
 /* MACRO TYPEDEF CONSTANT ENUM
  *------------------------------------------------------------------*/
-#define MSC_FLASH_ADDR_START      0xAD000
+#define MSC_FLASH_ADDR_END      0xED000
 #define MSC_FLASH_SIZE          (256*1024)
+#define MSC_FLASH_ADDR_START    (MSC_FLASH_ADDR_END-MSC_FLASH_SIZE)
 #define MSC_FLASH_BLOCK_SIZE    512
 
+#define FL_PAGE_SZ              4096
+
 /*------------------------------------------------------------------*/
 /* VARIABLES
  *------------------------------------------------------------------*/
@@ -139,12 +141,56 @@ int32_t tud_msc_scsi_cb (uint8_t rhport, uint8_t lun, uint8_t const scsi_cmd[16]
   return len;
 }
 
+/*------------------------------------------------------------------*/
+/* Internal Flash
+ *------------------------------------------------------------------*/
+#define NO_CACHE 0xffffffff
+
+uint8_t  _fl_cache[FL_PAGE_SZ] ATTR_ALIGNED(4);
+uint32_t _fl_addr = NO_CACHE;
+
+
+static void fl_flush() {
+    if (_fl_addr == NO_CACHE) return;
+
+    // Skip if data is the same
+    if (memcmp(_fl_cache, (void *)_fl_addr, FL_PAGE_SZ) != 0) {
+//        _is_flashing = true;
+        nrf_nvmc_page_erase(_fl_addr);
+        nrf_nvmc_write_words(_fl_addr, (uint32_t *)_fl_cache, FL_PAGE_SZ / sizeof(uint32_t));
+    }
+
+    _fl_addr = NO_CACHE;
+}
+
+static bool fl_write(uint32_t addr, uint8_t* buf, uint16_t bufsize)
+{
+    uint32_t new_addr = addr & ~(FL_PAGE_SZ - 1);
+
+    if (new_addr != _fl_addr) {
+        fl_flush();
+
+        // writing previous cached data, skip current data until flashing is done
+        // tinyusb stack will invoke write_block() with the same parameters later on
+//        if ( _is_flashing ) return;
+
+        _fl_addr = new_addr;
+        memcpy(_fl_cache, (void *)new_addr, FL_PAGE_SZ);
+    }
+
+    memcpy(_fl_cache + (addr & (FL_PAGE_SZ - 1)), buf, bufsize);
+
+    return true;
+}
+
+
 /*------------------------------------------------------------------*/
 /* Tinyusb Flash READ10 & WRITE10
  *------------------------------------------------------------------*/
 int32_t tud_msc_read10_cb (uint8_t rhport, uint8_t lun, uint32_t lba, uint32_t offset, void* buffer, uint32_t bufsize)
 {
-  (void) rhport; (void) lun;
+    (void) rhport;
+    (void) lun;
 
     uint32_t addr = lba2addr(lba) + offset;
     memcpy(buffer, (uint8_t*) addr, bufsize);
@@ -155,9 +201,20 @@ int32_t tud_msc_read10_cb (uint8_t rhport, uint8_t lun, uint32_t lba, uint32_t o
 int32_t tud_msc_write10_cb (uint8_t rhport, uint8_t lun, uint32_t lba, uint32_t offset, void* buffer, uint32_t bufsize)
 {
     (void) rhport; (void) lun;
+    uint32_t addr = lba2addr(lba) + offset;
+
+    // bufsize <= CFG_TUD_MSC_BUFSIZE (4096)
+    fl_write(addr, buffer, bufsize);
 
     return bufsize;
 }
 
-#endif
+void tud_msc_write10_complete_cb(uint8_t rhport, uint8_t lun)
+{
+    (void) rhport; (void) lun;
+
+    // flush pending cache when write10 is complete
+    fl_flush();
+}
+
 #endif