MakefileBasedBuild/Atmel/sam3x/sam3x-ek/libraries/usb_host/class/mass_storage/scsi_decoder/scsi_decoder.c

/* This source file is part of the AVR Software Framework 2.0.0 release */

/*This file is prepared for Doxygen automatic documentation generation.*/
/*! \file *********************************************************************
 *
 * \brief Management of the SCSI decoding.
 *
 * This file manages the SCSI decoding.
 *
 * - Compiler:           IAR EWAVR32 and GNU GCC for AVR32
 * - Supported devices:  All AVR32 devices with a USB module can be used.
 * - AppNote:
 *
 * \author               Atmel Corporation: http://www.atmel.com \n
 *                       Support and FAQ: http://support.atmel.no/
 *
 ******************************************************************************/

/* Copyright (c) 2009 Atmel Corporation. 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. The name of Atmel may not be used to endorse or promote products derived
 * from this software without specific prior written permission.
 *
 * 4. This software may only be redistributed and used in connection with an Atmel
 * AVR product.
 *
 * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
 * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL 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
 *
 */

//_____  I N C L U D E S ___________________________________________________

#include "conf_usb.h"


#if USB_DEVICE_FEATURE == ENABLED

#include "scsi_decoder.h"
#include "usb_drv.h"
#include "ctrl_access.h"


//_____ D E C L A R A T I O N S ____________________________________________

extern U8 usb_LUN;
extern U8 ms_endpoint;


/*! \brief Writes the header of the MODE SENSE (6) and (10) commands.
 *
 * \param b_sense_10      Boolean indicating whether the (10) version of the
 *                        command is requested:
 *   \arg \c TRUE to specify a MODE SENSE (10) command;
 *   \arg \c FALSE to specify a MODE SENSE (6) command.
 * \param u8_data_length  Data length in bytes.
 */
static void sbc_header_mode_sense(Bool b_sense_10, U8 u8_data_length);

/*! \brief Writes the Error Recovery mode page.
 *
 * \param length  Allocated data length in bytes.
 */
static void send_read_write_error_recovery_page(U8 length);

/*! \brief Writes the Informational Exceptions Control mode page.
 */
static void send_informational_exceptions_page(void);


//_____ D E F I N I T I O N S ______________________________________________

U8  g_scsi_command[16];
U8  g_scsi_status;
U32 g_scsi_data_remaining;

s_scsi_sense g_scsi_sense;

U8 g_scsi_ep_ms_in;
U8 g_scsi_ep_ms_out;

//! INQUIRY data.
static const sbc_st_std_inquiry_data sbc_std_inquiry_data =
{
  // Byte 0: 0x00.
  0,      // PeripheralQualifier: Currently connected.
  0,      // DeviceType: Direct-access device.

  // Byte 1: 0x80.
  1,      // RMB: Medium is removable (this bit must be at 1, else the medium isn't seen by Windows).
  0,      // Reserved1.

  // Byte 2: 0x00.
  0,      // Version: Device not compliant to any standard.

  // Byte 3: 0x02.
  0,      // AERC.
  0,      // Obsolete0.
  0,      // NormACA.
  2,      // Response data format.

  // Byte 4: 0x1F.
  // Byte 5: 0x00.
  // Byte 6: 0x00.
          // Reserved4[3].
  {
    0x1F,   // Additional Length (n - 4).
    0,      // SCCS: SCC supported.
    0
  },

  // Byte 7: 0x00.
  0,      // RelativeAddressing.
  0,      // Wide32Bit.
  0,      // Wide16Bit.
  0,      // Synchronous.
  0,      // LinkedCommands.
  0,      // Reserved5.
  0,      // CommandQueue.
  0,      // SoftReset.

  SBC_VENDOR_ID,

  SBC_PRODUCT_ID,

  SBC_REVISION_ID
};


Bool scsi_decode_command(void)
{
  Bool status = FALSE;

  switch (g_scsi_command[0])  // Check received command.
  {
  case SBC_CMD_TEST_UNIT_READY:               // 0x00 - Mandatory.
    status = sbc_test_unit_ready();
    break;

  case SBC_CMD_REQUEST_SENSE:                 // 0x03 - Mandatory.
    status = sbc_request_sense();
    break;

  case SBC_CMD_INQUIRY:                       // 0x12 - Mandatory.
    status = sbc_inquiry();
    break;

  case SBC_CMD_MODE_SENSE_6:                  // 0x1A - Optional.
    status = sbc_mode_sense(FALSE);
    break;

  case SBC_CMD_PREVENT_ALLOW_MEDIUM_REMOVAL:  // 0x1E - Optional.
    status = sbc_prevent_allow_medium_removal();
    break;

  case SBC_CMD_READ_CAPACITY_10:              // 0x25 - Mandatory.
    status = sbc_read_capacity();
    break;

  case SBC_CMD_READ_10:                       // 0x28 - Mandatory.
    Scsi_start_read_action();
    status = sbc_read_10();
    Scsi_stop_read_action();
    break;

  case SBC_CMD_WRITE_10:                      // 0x2A - Optional.
    Scsi_start_write_action();
    status = sbc_write_10();
    Scsi_stop_write_action();
    break;

  case SBC_CMD_VERIFY_10:                     // 0x2F - Optional.
    status = TRUE;
    sbc_lun_status_is_good();
    break;

  case SBC_CMD_MODE_SENSE_10:                 // 0x5A - Optional.
    status = sbc_mode_sense(TRUE);
    break;

  case SBC_CMD_START_STOP_UNIT:               // 0x1B - Ignored. This command is used by the Linux 2.4 kernel,
    break;                                    // for which we can not reply INVALID COMMAND, otherwise the disk will not mount.

  case SBC_CMD_FORMAT_UNIT:                   // 0x04 - Mandatory.
  case SBC_CMD_REASSIGN_BLOCKS:               // 0x07 - Optional.
  case SBC_CMD_READ_6:                        // 0x08 - Mandatory.
  case SBC_CMD_WRITE_6:                       // 0x0A - Optional.
  case SBC_CMD_MODE_SELECT_6:                 // 0x15 - Optional.
  case SBC_CMD_RECEIVE_DIAGNOSTIC_RESULTS:    // 0x1C - Optional.
  case SBC_CMD_SEND_DIAGNOSTIC:               // 0x1D - Mandatory.
  case SBC_CMD_WRITE_AND_VERIFY_10:           // 0x2E - Optional.
  case SBC_CMD_PREFETCH_10:                   // 0x34 - Optional.
  case SBC_CMD_SYNCHRONIZE_CACHE_10:          // 0x35 - Optional.
  case SBC_CMD_READ_DEFECT_DATA_10:           // 0x37 - Optional.
  case SBC_CMD_WRITE_BUFFER:                  // 0x3B - Optional.
  case SBC_CMD_READ_BUFFER:                   // 0x3C - Optional.
  case SBC_CMD_READ_LONG_10:                  // 0x3E - Optional.
  case SBC_CMD_WRITE_LONG_10:                 // 0x3F - Optional.
  case SBC_CMD_WRITE_SAME_10:                 // 0x41 - Optional.
  case SBC_CMD_LOG_SELECT:                    // 0x4C - Optional.
  case SBC_CMD_LOG_SENSE:                     // 0x4D - Optional.
  case SBC_CMD_XDWRITE_10:                    // 0x50 - Optional.
  case SBC_CMD_XPWRITE_10:                    // 0x51 - Optional.
  case SBC_CMD_XDREAD_10:                     // 0x52 - Optional.
  case SBC_CMD_XDWRITEREAD_10:                // 0x53 - Optional.
  case SBC_CMD_MODE_SELECT_10:                // 0x55 - Optional.
  case SBC_CMD_PERSISTENT_RESERVE_IN:         // 0x5E - Optional.
  case SBC_CMD_PERSISTENT_RESERVE_OUT:        // 0x5F - Optional.
  case SBC_CMD_EXTENDED_COPY:                 // 0x83 - Optional.
  case SBC_CMD_RECEIVE_COPY_RESULTS:          // 0x84 - Optional.
  case SBC_CMD_ACCESS_CONTROL_IN:             // 0x86 - Optional.
  case SBC_CMD_ACCESS_CONTROL_OUT:            // 0x87 - Optional.
  case SBC_CMD_READ_16:                       // 0x88 - Optional.
  case SBC_CMD_WRITE_16:                      // 0x8A - Optional.
  case SBC_CMD_READ_ATTRIBUTE:                // 0x8C - Optional.
  case SBC_CMD_WRITE_ATTRIBUTE:               // 0x8D - Optional.
  case SBC_CMD_WRITE_AND_VERIFY_16:           // 0x8E - Optional.
  case SBC_CMD_VERIFY_16:                     // 0x8F - Optional.
  case SBC_CMD_PREFETCH_16:                   // 0x90 - Optional.
  case SBC_CMD_SYNCHRONIZE_CACHE_16:          // 0x91 - Optional.
  case SBC_CMD_WRITE_SAME_16:                 // 0x93 - Optional.
  case SBC_CMD_REPORT_LUNS:                   // 0xA0 - Mandator.
  case SBC_CMD_READ_12:                       // 0xA8 - Optional.
  case SBC_CMD_WRITE_12:                      // 0xAA - Optional.
  case SBC_CMD_WRITE_AND_VERIFY_12:           // 0xAE - Optional.
  case SBC_CMD_VERIFY_12:                     // 0xAF - Optional.
  case SBC_CMD_READ_DEFECT_DATA_12:           // 0xB7 - Optional.
  default:
    // Command not supported.
    Sbc_send_failed();
    Sbc_build_sense(SBC_SENSE_KEY_ILLEGAL_REQUEST, SBC_ASC_INVALID_COMMAND_OPERATION_CODE, 0x00);
    break;
  }

  return status;
}


Bool sbc_test_unit_ready(void)
{
  switch (mem_test_unit_ready(usb_LUN))
  {
  case CTRL_GOOD:
    sbc_lun_status_is_good();
    break;

  case CTRL_NO_PRESENT:
    sbc_lun_status_is_not_present();
    break;

  case CTRL_BUSY:
    sbc_lun_status_is_busy_or_change();
    break;

  case CTRL_FAIL:
  default:
    sbc_lun_status_is_fail();
    break;
  }

  return TRUE;
}


Bool sbc_request_sense(void)
{
  U8 allocation_length;
  U8 request_sense_output[18];  // The maximal size of request is 17.

  allocation_length = min(g_scsi_command[4], sizeof(request_sense_output));

  if( allocation_length != 0 )
  {
     // Initialize the request sense data.
     request_sense_output[ 0] = SBC_RESPONSE_CODE_SENSE; // 0x70.
     request_sense_output[ 1] = 0x00;                    // Obsolete.
     request_sense_output[ 2] = g_scsi_sense.key;
   
     request_sense_output[ 3] = 0x00;  // For direct access media, Information field.
     request_sense_output[ 4] = 0x00;  // Give the unsigned logical block.
     request_sense_output[ 5] = 0x00;  // Address associated with the sense key.
     request_sense_output[ 6] = 0x00;
   
     request_sense_output[ 7] = SBC_ADDITIONAL_SENSE_LENGTH; // Device shall not adjust the additional sense length to reflect truncation.
     request_sense_output[ 8] = SBC_COMMAND_SPECIFIC_INFORMATION_3;
     request_sense_output[ 9] = SBC_COMMAND_SPECIFIC_INFORMATION_2;
     request_sense_output[10] = SBC_COMMAND_SPECIFIC_INFORMATION_1;
     request_sense_output[11] = SBC_COMMAND_SPECIFIC_INFORMATION_0;
   
     request_sense_output[12] = g_scsi_sense.asc;
     request_sense_output[13] = g_scsi_sense.ascq;
   
     request_sense_output[14] = SBC_FIELD_REPLACEABLE_UNIT_CODE;
     request_sense_output[15] = SBC_SENSE_KEY_SPECIFIC_2;
     request_sense_output[16] = SBC_SENSE_KEY_SPECIFIC_1;
     request_sense_output[17] = SBC_SENSE_KEY_SPECIFIC_0;
   
     // Send the request data.
     Usb_reset_endpoint_fifo_access(g_scsi_ep_ms_in);
     usb_write_ep_txpacket(g_scsi_ep_ms_in, request_sense_output, allocation_length, NULL);
     Sbc_valid_write_usb(allocation_length);
     // MSC Compliance - Wait end of all transmitions on USB line, because a stall may be send after data
     while( 0 != Usb_nb_busy_bank(EP_MS_IN) );
  }
  sbc_lun_status_is_good();
  return (allocation_length == g_scsi_command[4]);
}


Bool sbc_inquiry(void)
{
  U8 allocation_length;

  // CMDT or EPVD bit is not 0 or PAGE or OPERATION CODE fields != 0x00.
  if ((g_scsi_command[1] & 0x03) || g_scsi_command[2])
  {
    sbc_lun_status_is_cdb_field();
    return FALSE;
  }
  
  // Send standard INQUIRY data (bytes 0 to (allocation_length - 1)).
  allocation_length = min(g_scsi_command[4], sizeof(sbc_st_std_inquiry_data));
  if( allocation_length != 0 )
  {
     while (!Is_usb_in_ready(g_scsi_ep_ms_in))
     {
       if(!Is_usb_endpoint_enabled(g_scsi_ep_ms_in))
         return FALSE; // USB Reset
     }         
     Usb_reset_endpoint_fifo_access(g_scsi_ep_ms_in);
     usb_write_ep_txpacket(g_scsi_ep_ms_in, &sbc_std_inquiry_data,
                           allocation_length, NULL);
     Sbc_valid_write_usb(allocation_length);
     // MSC Compliance - Wait end of all transmitions on USB line, because a stall may be send after data
     while( 0 != Usb_nb_busy_bank(EP_MS_IN) );
  }
  sbc_lun_status_is_good();
  return (allocation_length == g_scsi_command[4]);
}


Bool sbc_mode_sense(Bool b_sense_10)
{
  U8 allocation_length = (b_sense_10) ? g_scsi_command[8] : g_scsi_command[4];

  // Switch for page code.
  switch (g_scsi_command[2] & SBC_MSK_PAGE_CODE)
  {
  case SBC_PAGE_CODE_READ_WRITE_ERROR_RECOVERY:
    sbc_header_mode_sense(b_sense_10, SBC_MODE_DATA_LENGTH_READ_WRITE_ERROR_RECOVERY);
    send_read_write_error_recovery_page(allocation_length);
    Sbc_valid_write_usb(SBC_MODE_DATA_LENGTH_READ_WRITE_ERROR_RECOVERY + 1);
    break;

  // Page Code: Informational Exceptions Control mode page.
  case SBC_PAGE_CODE_INFORMATIONAL_EXCEPTIONS:
    sbc_header_mode_sense(b_sense_10, SBC_MODE_DATA_LENGTH_INFORMATIONAL_EXCEPTIONS);
    send_informational_exceptions_page();
    Sbc_valid_write_usb(SBC_MODE_DATA_LENGTH_INFORMATIONAL_EXCEPTIONS + 1);
    break;

  case SBC_PAGE_CODE_ALL:
    if( b_sense_10 ) {
       sbc_header_mode_sense( b_sense_10 , (allocation_length < (SBC_MODE_DATA_LENGTH_CODE_ALL+2))? (allocation_length-2) : SBC_MODE_DATA_LENGTH_CODE_ALL );
    }else{
       sbc_header_mode_sense( b_sense_10 , (allocation_length < (SBC_MODE_DATA_LENGTH_CODE_ALL+1))? (allocation_length-1) : SBC_MODE_DATA_LENGTH_CODE_ALL );
    }
    if (allocation_length == ((b_sense_10) ? 8 : 4))
    {
      Sbc_valid_write_usb(allocation_length);
      break;
    }
    // Send page by ascending order code.
    send_read_write_error_recovery_page(allocation_length); // 12 bytes.
    if (allocation_length > 12)
    {
      send_informational_exceptions_page();                 // 12 bytes.
      Sbc_valid_write_usb(SBC_MODE_DATA_LENGTH_CODE_ALL + 1);
    }
    else
    {
      Sbc_valid_write_usb(allocation_length);
    }
    break;

  default:
    sbc_lun_status_is_cdb_field();
    return FALSE;
  }

  sbc_lun_status_is_good();

  return TRUE;
}


Bool sbc_prevent_allow_medium_removal(void)
{
  sbc_lun_status_is_good();
  return TRUE;
}


Bool sbc_read_capacity(void)
{
  U32 mem_size_nb_sector;

  switch (mem_read_capacity(usb_LUN, &mem_size_nb_sector))
  {
  case CTRL_GOOD:
    Usb_reset_endpoint_fifo_access(g_scsi_ep_ms_in);

    // Return nb block.
    Usb_write_endpoint_data(g_scsi_ep_ms_in, 32,
                            sbc_format_mcu_to_scsi_data(32, mem_size_nb_sector));

    // Return block size (= 512 bytes).
    Usb_write_endpoint_data(g_scsi_ep_ms_in, 32,
                            Sbc_format_mcu_to_scsi_data(32, 512));

    Sbc_valid_write_usb(SBC_READ_CAPACITY_LENGTH);
    sbc_lun_status_is_good();
    return TRUE;

  case CTRL_NO_PRESENT:
    sbc_lun_status_is_not_present();
    break;

  case CTRL_BUSY:
    sbc_lun_status_is_busy_or_change();
    break;

  case CTRL_FAIL:
  default:
    sbc_lun_status_is_fail();
    break;
  }
  return FALSE;
}


Bool sbc_read_10(void)
{
  U32 mass_addr;  // Read/write block address.
  U16 mass_size;  // Read/write number of blocks.

  // Read address.
  MSB0W(mass_addr) = g_scsi_command[2];
  MSB1W(mass_addr) = g_scsi_command[3];
  MSB2W(mass_addr) = g_scsi_command[4];
  MSB3W(mass_addr) = g_scsi_command[5];

  // Read size.
  MSB(mass_size) = g_scsi_command[7];
  LSB(mass_size) = g_scsi_command[8];

  if( ms_endpoint == EP_MS_OUT )
  {
     // Error in command field
     sbc_lun_status_is_cdb_field();
     return FALSE;
  }

  // No data to transfer.
  if( 0 == g_scsi_data_remaining )
  {
     if( mass_size == (g_scsi_data_remaining/512) )
     {
        sbc_lun_status_is_good();
     }else{
        sbc_lun_status_is_cdb_field();
     }
     return TRUE;
  }

  switch (memory_2_usb(usb_LUN, mass_addr, g_scsi_data_remaining/512))
  {
  case CTRL_GOOD:
    if( mass_size == (g_scsi_data_remaining/512) )
    {
       sbc_lun_status_is_good();
    }else{
       sbc_lun_status_is_cdb_field();
    }
    g_scsi_data_remaining = 0;
    return TRUE;

  case CTRL_NO_PRESENT:
    sbc_lun_status_is_not_present();
    break;

  case CTRL_BUSY:
    sbc_lun_status_is_busy_or_change();
    break;

  case CTRL_FAIL:
  default:
    sbc_lun_status_is_fail();
    break;
  }

  return FALSE;
}


Bool sbc_write_10(void)
{
  U32 mass_addr;  // Read/write block address.
  U16 mass_size;  // Read/write number of blocks.

  // Read address.
  MSB0W(mass_addr) = g_scsi_command[2];
  MSB1W(mass_addr) = g_scsi_command[3];
  MSB2W(mass_addr) = g_scsi_command[4];
  MSB3W(mass_addr) = g_scsi_command[5];

  // Read size.
  MSB(mass_size) = g_scsi_command[7];
  LSB(mass_size) = g_scsi_command[8];

  if( ms_endpoint == EP_MS_IN )
  {
     // Error in command field
     sbc_lun_status_is_cdb_field();
     return FALSE;
  }

  // No data to transfer.
  if( 0 == g_scsi_data_remaining )
  {
     if( mass_size == (g_scsi_data_remaining/512) )
     {
        sbc_lun_status_is_good();
     }else{
        sbc_lun_status_is_cdb_field();
     }
     return TRUE;
  }
   
  if (mem_wr_protect(usb_LUN))
  {
    sbc_lun_status_is_protected();
    return FALSE;
  }

  switch (usb_2_memory(usb_LUN, mass_addr, g_scsi_data_remaining/512 ))
  {
  case CTRL_GOOD:
    if( mass_size == (g_scsi_data_remaining/512) )
    {
       sbc_lun_status_is_good();
    }else{
       sbc_lun_status_is_cdb_field();
    }
    g_scsi_data_remaining = 0;
    return TRUE;

  case CTRL_NO_PRESENT:
    sbc_lun_status_is_not_present();
    break;

  case CTRL_BUSY:
    sbc_lun_status_is_busy_or_change();
    break;

  case CTRL_FAIL:
  default:
    sbc_lun_status_is_fail();
    break;
  }
  return FALSE;
}


static void sbc_header_mode_sense(Bool b_sense_10, U8 u8_data_length)
{
  Usb_reset_endpoint_fifo_access(g_scsi_ep_ms_in);

  // Send data length.
  if (b_sense_10)
  {
    Usb_write_endpoint_data(g_scsi_ep_ms_in, 8, 0);
  }
  Usb_write_endpoint_data(g_scsi_ep_ms_in, 8, u8_data_length);

  // Send device type.
  Usb_write_endpoint_data(g_scsi_ep_ms_in, 8, SBC_MEDIUM_TYPE);

  // Write protect status.
  Usb_write_endpoint_data(g_scsi_ep_ms_in, 8,
                          (mem_wr_protect(usb_LUN)) ? SBC_DEV_SPEC_PARAM_WR_PROTECT :
                                                      SBC_DEV_SPEC_PARAM_WR_ENABLE);

  if (b_sense_10)
  {
    // Reserved.
    Usb_write_endpoint_data(g_scsi_ep_ms_in, 16, 0);
  }

  // Send block descriptor length.
  if (b_sense_10)
  {
    Usb_write_endpoint_data(g_scsi_ep_ms_in, 8, 0);
  }
  Usb_write_endpoint_data(g_scsi_ep_ms_in, 8, SBC_BLOCK_DESCRIPTOR_LENGTH);
}


static void send_read_write_error_recovery_page(U8 length)
{
  Usb_write_endpoint_data(g_scsi_ep_ms_in, 8, SBC_PAGE_CODE_READ_WRITE_ERROR_RECOVERY);

  // Page Length.
  Usb_write_endpoint_data(g_scsi_ep_ms_in, 8, SBC_PAGE_LENGTH_READ_WRITE_ERROR_RECOVERY);
  Usb_write_endpoint_data(g_scsi_ep_ms_in, 8, 0x80);
  Usb_write_endpoint_data(g_scsi_ep_ms_in, 8, SBC_READ_RETRY_COUNT);
  Usb_write_endpoint_data(g_scsi_ep_ms_in, 8, 0x00);
  Usb_write_endpoint_data(g_scsi_ep_ms_in, 8, 0x00);
  Usb_write_endpoint_data(g_scsi_ep_ms_in, 8, 0x00);
  // Reserved.
  Usb_write_endpoint_data(g_scsi_ep_ms_in, 8, 0x00);

  if (length > 12)
  {
    Usb_write_endpoint_data(g_scsi_ep_ms_in, 8, SBC_WRITE_RETRY_COUNT);
    Usb_write_endpoint_data(g_scsi_ep_ms_in, 8, 0x00);
    Usb_write_endpoint_data(g_scsi_ep_ms_in, 16,
                            Sbc_format_mcu_to_scsi_data(16, SBC_RECOVERY_TIME_LIMIT));
  }
}


static void send_informational_exceptions_page(void)
{
  // Page Code: Informational Exceptions Control mode page.
  Usb_write_endpoint_data(g_scsi_ep_ms_in, 8, SBC_PAGE_CODE_INFORMATIONAL_EXCEPTIONS);

  // Page Length.
  Usb_write_endpoint_data(g_scsi_ep_ms_in, 8, SBC_PAGE_LENGTH_INFORMATIONAL_EXCEPTIONS);
  // ..., test bit = 0, ...
  Usb_write_endpoint_data(g_scsi_ep_ms_in, 8, 0x00);
  // MRIE = 0x05.
  Usb_write_endpoint_data(g_scsi_ep_ms_in, 8, SBC_MRIE_GENERATE_NO_SENSE);
  // Interval Timer.
  Usb_write_endpoint_data(g_scsi_ep_ms_in, 32,
                          Sbc_format_mcu_to_scsi_data(32, 0x00000000));
  // Report Count.
  Usb_write_endpoint_data(g_scsi_ep_ms_in, 32,
                          Sbc_format_mcu_to_scsi_data(32, 0x00000001));
}


void sbc_lun_status_is_good(void)
{
  Sbc_send_good();
  Sbc_build_sense(SBC_SENSE_KEY_NO_SENSE, SBC_ASC_NO_ADDITIONAL_SENSE_INFORMATION, 0x00);
}


void sbc_lun_status_is_not_present(void)
{
  Sbc_send_failed();
  Sbc_build_sense(SBC_SENSE_KEY_NOT_READY, SBC_ASC_MEDIUM_NOT_PRESENT, 0x00);
}


void sbc_lun_status_is_busy_or_change(void)
{
  Sbc_send_failed();
  Sbc_build_sense(SBC_SENSE_KEY_UNIT_ATTENTION, SBC_ASC_NOT_READY_TO_READY_CHANGE, 0x00);
}


void sbc_lun_status_is_fail(void)
{
  Sbc_send_failed();
  Sbc_build_sense(SBC_SENSE_KEY_HARDWARE_ERROR, SBC_ASC_NO_ADDITIONAL_SENSE_INFORMATION, 0x00);
}


void sbc_lun_status_is_protected(void)
{
  Sbc_send_failed();
  Sbc_build_sense(SBC_SENSE_KEY_DATA_PROTECT, SBC_ASC_WRITE_PROTECTED, 0x00);
}


void sbc_lun_status_is_cdb_field(void)
{
   Sbc_send_failed();
   Sbc_build_sense(SBC_SENSE_KEY_ILLEGAL_REQUEST, SBC_ASC_INVALID_FIELD_IN_CDB, 0x00);
}


#endif  // USB_DEVICE_FEATURE == ENABLED