/*
    ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010 Giovanni Di Sirio.

    This file is part of ChibiOS/RT.

    ChibiOS/RT is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 3 of the License, or
    (at your option) any later version.

    ChibiOS/RT is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

/**
 * @file    usb_msc.h
 * @brief   USB Mass Storage Class header.
 *
 * @addtogroup USB_MSC
 * @{
 */

#ifndef _USB_MSC_H_
#define _USB_MSC_H_

/*===========================================================================*/
/* Driver constants.                                                         */
/*===========================================================================*/

#define MSC_CBW_SIGNATURE               0x43425355
#define MSC_CSW_SIGNATURE               0x53425355

#define MSC_GET_MAX_LUN_COMMAND         0xFE
#define MSC_MASS_STORAGE_RESET_COMMAND  0xFF

/*===========================================================================*/
/* Driver pre-compile time settings.                                         */
/*===========================================================================*/

/**
 * @brief   Endpoint number for bulk IN.
 */
#if !defined(MSC_DATA_IN_EP) || defined(__DOXYGEN__)
#define MSC_DATA_IN_EP          1
#endif

/**
 * @brief   Endpoint number for bulk OUT.
 */
#if !defined(MSC_DATA_OUT_EP) || defined(__DOXYGEN__)
#define MSC_DATA_OUT_EP         2
#endif

/*===========================================================================*/
/* Derived constants and error checks.                                       */
/*===========================================================================*/

/*===========================================================================*/
/* Driver data structures and types.                                         */
/*===========================================================================*/

/**
 * @brief   Type of the MSC possible states.
 */
typedef enum {
  MSC_IDLE = 0,
  MSC_DATA_OUT,
  MSC_DATA_IN,
  MSC_SENDING_CSW,
  MSC_ERROR
} mscstate_t;

/**
 * @brief   CBW structure.
 */
struct CBW {
  uint32_t          dCBWSignature;
  uint32_t          dCBWTag;
  uint32_t          dCBWDataTransferLength;
  uint8_t           bmCBWFlags;
  uint8_t           bCBWLUN;
  uint8_t           bCBWCBLength;
  uint8_t           CBWCB[16];
};

/**
 * @brief   CSW structure.
 */
struct CSW {
  uint32_t          dCSWSignature;
  uint32_t          dCSWTag;
  uint32_t          dCSWDataResidue;
  uint8_t           bCSWStatus;
};

/**
 * @brief   Type of a CBW structure.
 */
typedef struct CBW msccbw_t;

/**
 * @brief   Type of a CSW structure.
 */
typedef struct CSW msccsw_t;

/*===========================================================================*/
/* Driver macros.                                                            */
/*===========================================================================*/

/*===========================================================================*/
/* External declarations.                                                    */
/*===========================================================================*/

#ifdef __cplusplus
extern "C" {
#endif
  bool_t mscRequestsHook(USBDriver *usbp);
  void mscDataTransmitted(USBDriver *usbp, usbep_t ep);
  void mscDataReceived(USBDriver *usbp, usbep_t ep);
#ifdef __cplusplus
}
#endif

#endif  /* _USB_MSC_H_ */

/** @} */