277 lines
7.5 KiB
C
277 lines
7.5 KiB
C
/* This file has been prepared for Doxygen automatic documentation generation.*/
|
|
/*! \file usb_task.c *********************************************************************
|
|
*
|
|
* \brief
|
|
* This file manages the USB storage.
|
|
*
|
|
* \addtogroup usbstick
|
|
*
|
|
* \author
|
|
* Atmel Corporation: http://www.atmel.com \n
|
|
* Support email: avr@atmel.com
|
|
******************************************************************************/
|
|
/*
|
|
Copyright (c) 2004 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:
|
|
|
|
* Redistributions of source code must retain the above copyright
|
|
notice, this list of conditions and the following disclaimer.
|
|
* 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.
|
|
* Neither the name of the copyright holders nor the names of
|
|
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 AND CONTRIBUTORS "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 OWNER OR CONTRIBUTORS 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.
|
|
*/
|
|
|
|
/**
|
|
\addtogroup usbstorage
|
|
@{
|
|
*/
|
|
|
|
//_____ I N C L U D E S ___________________________________________________
|
|
|
|
|
|
|
|
#include "contiki.h"
|
|
#include "usb_drv.h"
|
|
#include "storage/storage_task.h"
|
|
#include "usb_descriptors.h"
|
|
#include "usb_standard_request.h"
|
|
#include "usb_specific_request.h"
|
|
#include "storage/scsi_decoder.h"
|
|
#include "storage/ctrl_access.h"
|
|
|
|
|
|
//_____ M A C R O S ________________________________________________________
|
|
|
|
|
|
|
|
|
|
|
|
//_____ D E F I N I T I O N S ______________________________________________
|
|
|
|
|
|
|
|
//_____ D E C L A R A T I O N S ____________________________________________
|
|
|
|
|
|
|
|
extern U8 usb_configuration_nb;
|
|
|
|
|
|
static bit ms_data_direction;
|
|
static U8 dCBWTag[4];
|
|
|
|
extern U8 g_scsi_status;
|
|
extern U32 g_scsi_data_remaining;
|
|
extern bit ms_multiple_drive;
|
|
extern U8 g_scsi_command[16];
|
|
|
|
|
|
U8 usb_LUN;
|
|
|
|
|
|
void usb_mass_storage_cbw (void);
|
|
void usb_mass_storage_csw (void);
|
|
|
|
#define Usb_set_ms_data_direction_in() (ms_data_direction = 1)
|
|
#define Usb_set_ms_data_direction_out() (ms_data_direction = 0)
|
|
#define Is_usb_ms_data_direction_in() (ms_data_direction == 1)
|
|
|
|
static struct etimer et;
|
|
|
|
PROCESS(storage_process, "Storage process");
|
|
|
|
/**
|
|
* \brief USB Mass Storage Class Process
|
|
*
|
|
* This is the link between USB and the "good stuff". In this routine data
|
|
* is received and processed by USB Storage Class
|
|
*/
|
|
PROCESS_THREAD(storage_process, ev, data_proc)
|
|
{
|
|
PROCESS_BEGIN();
|
|
|
|
while(1) {
|
|
|
|
|
|
if (usb_mode == mass_storage) {
|
|
|
|
if (Is_device_enumerated()) {
|
|
Usb_select_endpoint(MS_OUT_EP);
|
|
|
|
if (Is_usb_receive_out()) {
|
|
usb_mass_storage_cbw();
|
|
usb_mass_storage_csw();
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
if (usb_mode == mass_storage) {
|
|
etimer_set(&et, CLOCK_SECOND/250 + 1);
|
|
} else {
|
|
etimer_set(&et, CLOCK_SECOND);
|
|
}
|
|
|
|
PROCESS_WAIT_EVENT_UNTIL(etimer_expired(&et));
|
|
|
|
} //while(1)
|
|
|
|
PROCESS_END();
|
|
}
|
|
|
|
|
|
|
|
|
|
//! @brief USB Command Block Wrapper (CBW) management
|
|
//!
|
|
//! This function decodes the CBW command and stores the SCSI command
|
|
//!
|
|
//! @warning Code:?? bytes (function code length)
|
|
//!
|
|
void usb_mass_storage_cbw (void)
|
|
{
|
|
bit cbw_error;
|
|
uint8_t c;
|
|
uint8_t dummy;
|
|
|
|
cbw_error = FALSE;
|
|
Usb_select_endpoint(MS_OUT_EP); //! check if dCBWSignature is correct
|
|
if (0x55 != Usb_read_byte())
|
|
{ cbw_error = TRUE; } //! 'U'
|
|
if (0x53 != Usb_read_byte())
|
|
{ cbw_error = TRUE; } //! 'S'
|
|
if (0x42 != Usb_read_byte())
|
|
{ cbw_error = TRUE; } //! 'B'
|
|
if (0x43 != Usb_read_byte())
|
|
{ cbw_error = TRUE; } //! 'C'
|
|
|
|
dCBWTag[0] = Usb_read_byte(); //! Store CBW Tag to be repeated in CSW
|
|
dCBWTag[1] = Usb_read_byte();
|
|
dCBWTag[2] = Usb_read_byte();
|
|
dCBWTag[3] = Usb_read_byte();
|
|
|
|
LSB0(g_scsi_data_remaining) = Usb_read_byte();
|
|
LSB1(g_scsi_data_remaining) = Usb_read_byte();
|
|
LSB2(g_scsi_data_remaining) = Usb_read_byte();
|
|
LSB3(g_scsi_data_remaining) = Usb_read_byte();
|
|
|
|
|
|
if (Usb_read_byte() != 0x00) //! if (bmCBWFlags.bit7 == 1) {direction = IN}
|
|
{
|
|
Usb_set_ms_data_direction_in();
|
|
if (cbw_error)
|
|
{
|
|
Usb_ack_receive_out();
|
|
Usb_select_endpoint(MS_IN_EP);
|
|
Usb_enable_stall_handshake();
|
|
return;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
Usb_set_ms_data_direction_out();
|
|
if (cbw_error)
|
|
{
|
|
Usb_enable_stall_handshake();
|
|
Usb_ack_receive_out();
|
|
return;
|
|
}
|
|
}
|
|
|
|
usb_LUN = Usb_read_byte();
|
|
|
|
if (!ms_multiple_drive)
|
|
{
|
|
usb_LUN = get_cur_lun();
|
|
}
|
|
|
|
dummy = Usb_read_byte(); //! dummy CBWCBLength read
|
|
|
|
|
|
for (c=0; c<16; c++) // store scsi_command
|
|
{
|
|
g_scsi_command[c] = Usb_read_byte();
|
|
}
|
|
|
|
Usb_ack_receive_out();
|
|
|
|
if (Is_usb_ms_data_direction_in())
|
|
{
|
|
Usb_select_endpoint(MS_IN_EP);
|
|
}
|
|
|
|
if (TRUE != scsi_decode_command())
|
|
{
|
|
if (g_scsi_data_remaining != 0)
|
|
{
|
|
Usb_enable_stall_handshake();
|
|
}
|
|
}
|
|
}
|
|
|
|
//! @brief USB Command Status Wrapper (CSW) management
|
|
//!
|
|
//! This function sends the status in relation with the last CBW
|
|
//!
|
|
void usb_mass_storage_csw (void)
|
|
{
|
|
Usb_select_endpoint(MS_IN_EP);
|
|
while (Is_usb_endpoint_stall_requested())
|
|
{
|
|
Usb_select_endpoint(EP_CONTROL);
|
|
if (Is_usb_receive_setup()) { usb_process_request(); }
|
|
Usb_select_endpoint(MS_IN_EP);
|
|
}
|
|
|
|
Usb_select_endpoint(MS_OUT_EP);
|
|
while (Is_usb_endpoint_stall_requested())
|
|
{
|
|
Usb_select_endpoint(EP_CONTROL);
|
|
if (Is_usb_receive_setup()) { usb_process_request(); }
|
|
Usb_select_endpoint(MS_OUT_EP);
|
|
}
|
|
|
|
Usb_select_endpoint(MS_IN_EP);
|
|
while(!Is_usb_write_enabled());
|
|
//! write CSW Signature
|
|
Usb_write_byte(0x55); //! 'U'
|
|
Usb_write_byte(0x53); //! 'S'
|
|
Usb_write_byte(0x42); //! 'B'
|
|
Usb_write_byte(0x53); //! 'S'
|
|
//! write stored CBW Tag
|
|
Usb_write_byte(dCBWTag[0]);
|
|
Usb_write_byte(dCBWTag[1]);
|
|
Usb_write_byte(dCBWTag[2]);
|
|
Usb_write_byte(dCBWTag[3]);
|
|
//! write data residue value
|
|
Usb_write_byte( ((Byte*)&g_scsi_data_remaining)[3] );
|
|
Usb_write_byte( ((Byte*)&g_scsi_data_remaining)[2] );
|
|
Usb_write_byte( ((Byte*)&g_scsi_data_remaining)[1] );
|
|
Usb_write_byte( ((Byte*)&g_scsi_data_remaining)[0] );
|
|
|
|
//! write command status
|
|
Usb_write_byte(g_scsi_status); //! 0 -> PASS, 1 -> FAIL
|
|
Usb_send_in();
|
|
}
|
|
|
|
/** @} */
|