implement msc device class

usbd auto stall control for not supported return from class control request
usbd implement xfer isr callback mechanism
DCD
- implement dcd multiple qtd support
- dcd dcd_pipe_stall
- implement dcd_pipe_queue_xfer
- xfer_complete_isr
- flush control endpoint if received new setup while previous transfer is not complete
change msc_cmd_block_wrapper_t flags field to dir
force full speed for easy testing

NOTEs: somehow unable to get endpoint IN interrupt with ioc

demos/device/keyboard/mscd_app.c

@@ -0,0 +1,95 @@
+/**************************************************************************/
+/*!
+    @file     mscd_app.c
+    @author   hathach (tinyusb.org)
+
+    @section LICENSE
+
+    Software License Agreement (BSD License)
+
+    Copyright (c) 2013, hathach (tinyusb.org)
+    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.
+
+    This file is part of the tinyusb stack.
+*/
+/**************************************************************************/
+
+#include "mscd_app.h"
+
+#if TUSB_CFG_DEVICE_MSC
+//--------------------------------------------------------------------+
+// INCLUDE
+//--------------------------------------------------------------------+
+
+//--------------------------------------------------------------------+
+// MACRO CONSTANT TYPEDEF
+//--------------------------------------------------------------------+
+static scsi_inquiry_data_t mscd_inquiry_data TUSB_CFG_ATTR_USBRAM =
+{
+    .is_removable         = 1,
+    .version              = 2,
+    .response_data_format = 2,
+    .vendor_id            = "tinyusb",
+    .product_id           = "MSC Example",
+    .product_revision     = "0.01"
+} ;
+
+static scsi_read_capacity10_data_t mscd_read_capacity10_data TUSB_CFG_ATTR_USBRAM =
+{
+    .last_lba   = (16*1024*1024)/512,
+    .block_size = 512
+};
+
+//--------------------------------------------------------------------+
+// INTERNAL OBJECT & FUNCTION DECLARATION
+//--------------------------------------------------------------------+
+
+//--------------------------------------------------------------------+
+// tinyusb callback (ISR context)
+//--------------------------------------------------------------------+
+msc_csw_status_t tusbd_msc_scsi_received_isr(uint8_t coreid, uint8_t lun, uint8_t scsi_cmd[16], void ** pp_buffer, uint16_t expected_length)
+{
+  switch(scsi_cmd[0])
+  {
+    case SCSI_CMD_INQUIRY:
+      (*pp_buffer) = &mscd_inquiry_data;
+    break;
+
+    case SCSI_CMD_READ_CAPACITY_10:
+
+    break;
+
+    default: return MSC_CSW_STATUS_FAILED;
+  }
+
+  return MSC_CSW_STATUS_PASSED;
+}
+
+//--------------------------------------------------------------------+
+// IMPLEMENTATION
+//--------------------------------------------------------------------+
+
+
+#endif