usbmass.c

最新的LPC214X USBMASS驱动程序

//
//  $Id: usbmass.c 42 2008-10-04 18:40:36Z jcw $
//  $Revision: 42 $
//  $Author: jcw $
//  $Date: 2008-10-04 14:40:36 -0400 (Sat, 04 Oct 2008) $
//  $HeadURL: http://tinymicros.com/svn_public/arm/lpc2148_demo/trunk/usbmass/usbmass.c $
//

/*
	LPCUSB, an USB device driver for LPC microcontrollers	
	Copyright (C) 2006 Bertrik Sikken ([e-mail])

	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. The name of the author may not be used to endorse or promote products
	   derived from this software without specific prior written permission.

	THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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 "FreeRTOS.h"

#include "../usb/usbapi.h"
#include "../fatfs/disk.h"
#include "mscdebug.h"
#include "mscbot.h"
#include "usbmass.h"

//
//
//
#define MAX_PACKET_SIZE	64
#define LE_WORD(x) ((x) & 0xff), ((x) >> 8)

//
//
//
static U8 abClassReqData [4];

static const U8 abDescriptors [] = 
{
  //
  //  Device descriptor	
  //
  0x12,
  DESC_DEVICE,			
  LE_WORD(0x0200),		// bcdUSB
  0x00,					      // bDeviceClass
  0x00,					      // bDeviceSubClass
  0x00,					      // bDeviceProtocol
  MAX_PACKET_SIZE0,		// bMaxPacketSize
  LE_WORD(0xFFFF),		// idVendor
  LE_WORD(0x0003),		// idProduct
  LE_WORD(0x0100),		// bcdDevice
  0x01,					      // iManufacturer
  0x02,					      // iProduct
  0x03,					      // iSerialNumber
  0x01,					      // bNumConfigurations

  //
  //  Configuration descriptor
  //
  0x09,
  DESC_CONFIGURATION,
  LE_WORD(32),			// wTotalLength
  0x01,					// bNumInterfaces
  0x01,					// bConfigurationValue
  0x00,					// iConfiguration
  0xC0,					// bmAttributes
  0x32,					// bMaxPower

  //
  //  Interface
  //
  0x09,
  DESC_INTERFACE,
  0x00,					// bInterfaceNumber
  0x00,					// bAlternateSetting
  0x02,					// bNumEndPoints
  0x08,					// bInterfaceClass = mass storage
  0x06,					// bInterfaceSubClass = transparent SCSI
  0x50,					// bInterfaceProtocol = BOT
  0x00,					// iInterface

  //
  //  EP
  //
  0x07,
  DESC_ENDPOINT,
  MSC_BULK_IN_EP,			      // bEndpointAddress
  0x02,					            // bmAttributes = bulk
  LE_WORD(MAX_PACKET_SIZE), // wMaxPacketSize
  0x00,					            // bInterval

  //
  //  EP
  //
  0x07,
  DESC_ENDPOINT,
  MSC_BULK_OUT_EP,		      // bEndpointAddress
  0x02,					            // bmAttributes = bulk
  LE_WORD(MAX_PACKET_SIZE), // wMaxPacketSize
  0x00,					            // bInterval

  //
  //  String descriptors
  //
  0x04,
  DESC_STRING,
  LE_WORD(0x0409),

  0x0E,
  DESC_STRING,
  'L', 0, 'P', 0, 'C', 0, 'U', 0, 'S', 0, 'B', 0,

  0x12,
  DESC_STRING,
  'P', 0, 'r', 0, 'o', 0, 'd', 0, 'u', 0, 'c', 0, 't', 0, 'X', 0,

  0x1A,
  DESC_STRING,
  'D', 0, 'E', 0, 'A', 0, 'D', 0, 'C', 0, '0', 0, 'D', 0, 'E', 0, 'C', 0, 'A', 0, 'F', 0, 'E', 0,

  // terminating zero
  0
};


//
//
//
static BOOL usbmassHandleClassRequest (TSetupPacket *pSetup, int *piLen, U8 **ppbData)
{
  if (pSetup->wIndex != 0)
  {
    DBG ("Invalid idx %X\n", pSetup->wIndex);
    return FALSE;
  }

  if (pSetup->wValue != 0)
  {
    DBG ("Invalid val %X\n", pSetup->wValue);
    return FALSE;
  }

  switch (pSetup->bRequest) 
  {
    //
    //  Get max LUN (always return no LUNs)
    //
    case 0xfe:
      {
        *ppbData [0] = 0;
        *piLen = 1;
      }
      break;

    //
    //  MSC reset
    //
    case 0xff:
      {
        if (pSetup->wLength > 0)
          return FALSE;

        mscbotReset ();
      }
      break;

    default:
      {
        DBG ("Unhandled class\n");
      }
      return FALSE;
  }

  return TRUE;
}

//
//
//
void usbmassInit (void)
{
  portENTER_CRITICAL ();

  DSTATUS d;

  if ((d = diskInitialize (0)) != DRESULT_OK)
    diskErrorText (d);
  else
  {
    usbRegisterHandlers ();
    usbRegisterDescriptors (abDescriptors);
    usbRegisterRequestHandler (REQTYPE_TYPE_CLASS, usbmassHandleClassRequest, abClassReqData);
    usbHardwareRegisterEPIntHandler (MSC_BULK_IN_EP, mscbotBulkIn);
    usbHardwareRegisterEPIntHandler (MSC_BULK_OUT_EP, mscbotBulkOut);
    usbHardwareNakIntEnable (INACK_BI);
    usbSetupInterruptHandler ();
  }

  portEXIT_CRITICAL ();

  usbHardwareConnect (TRUE);

  DBG ("exiting usbmassInit()...\n");
}