326 lines
12 KiB
C
326 lines
12 KiB
C
/**************************************************************************/
|
|
/*!
|
|
@file msc_device.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 "tusb_option.h"
|
|
|
|
#if (MODE_DEVICE_SUPPORTED && CFG_TUSB_DEVICE_MSC)
|
|
|
|
#define _TINY_USB_SOURCE_FILE_
|
|
//--------------------------------------------------------------------+
|
|
// INCLUDE
|
|
//--------------------------------------------------------------------+
|
|
#include "common/tusb_common.h"
|
|
#include "msc_device.h"
|
|
#include "device/usbd_pvt.h"
|
|
|
|
//--------------------------------------------------------------------+
|
|
// MACRO CONSTANT TYPEDEF
|
|
//--------------------------------------------------------------------+
|
|
enum
|
|
{
|
|
MSC_STAGE_CMD = 0,
|
|
MSC_STAGE_DATA,
|
|
MSC_STAGE_STATUS
|
|
};
|
|
|
|
typedef struct {
|
|
// buffer for scsi's response other than read10 & write10.
|
|
// NOTE should be multiple of 64 to be compatible with lpc11/13u
|
|
uint8_t scsi_data[64];
|
|
ATTR_USB_MIN_ALIGNMENT msc_cbw_t cbw;
|
|
|
|
#if defined (__ICCARM__) && (CFG_TUSB_MCU == MCU_LPC11UXX || CFG_TUSB_MCU == MCU_LPC13UXX)
|
|
uint8_t padding1[64-sizeof(msc_cbw_t)]; // IAR cannot align struct's member
|
|
#endif
|
|
|
|
ATTR_USB_MIN_ALIGNMENT msc_csw_t csw;
|
|
|
|
uint8_t max_lun;
|
|
uint8_t interface_num;
|
|
uint8_t ep_in, ep_out;
|
|
|
|
uint8_t stage;
|
|
uint16_t data_len;
|
|
uint16_t xferred_len; // numbered of bytes transferred so far in the Data Stage
|
|
}mscd_interface_t;
|
|
|
|
CFG_TUSB_ATTR_USBRAM ATTR_USB_MIN_ALIGNMENT STATIC_VAR mscd_interface_t mscd_data;
|
|
//--------------------------------------------------------------------+
|
|
// INTERNAL OBJECT & FUNCTION DECLARATION
|
|
//--------------------------------------------------------------------+
|
|
static bool read10_write10_data_xfer(uint8_t rhport, mscd_interface_t* p_msc);
|
|
|
|
//--------------------------------------------------------------------+
|
|
// USBD-CLASS API
|
|
//--------------------------------------------------------------------+
|
|
void mscd_init(void)
|
|
{
|
|
memclr_(&mscd_data, sizeof(mscd_interface_t));
|
|
}
|
|
|
|
void mscd_close(uint8_t rhport)
|
|
{
|
|
memclr_(&mscd_data, sizeof(mscd_interface_t));
|
|
}
|
|
|
|
tusb_error_t mscd_open(uint8_t rhport, tusb_desc_interface_t const * p_interface_desc, uint16_t *p_length)
|
|
{
|
|
VERIFY( ( MSC_SUBCLASS_SCSI == p_interface_desc->bInterfaceSubClass &&
|
|
MSC_PROTOCOL_BOT == p_interface_desc->bInterfaceProtocol ), TUSB_ERROR_MSC_UNSUPPORTED_PROTOCOL );
|
|
|
|
mscd_interface_t * p_msc = &mscd_data;
|
|
|
|
//------------- Open Data Pipe -------------//
|
|
tusb_desc_endpoint_t const *p_endpoint = (tusb_desc_endpoint_t const *) descriptor_next( (uint8_t const*) p_interface_desc );
|
|
for(int i=0; i<2; i++)
|
|
{
|
|
TU_ASSERT(TUSB_DESC_ENDPOINT == p_endpoint->bDescriptorType &&
|
|
TUSB_XFER_BULK == p_endpoint->bmAttributes.xfer, TUSB_ERROR_DESCRIPTOR_CORRUPTED);
|
|
|
|
TU_ASSERT( dcd_edpt_open(rhport, p_endpoint), TUSB_ERROR_DCD_FAILED );
|
|
|
|
if ( p_endpoint->bEndpointAddress & TUSB_DIR_IN_MASK )
|
|
{
|
|
p_msc->ep_in = p_endpoint->bEndpointAddress;
|
|
}else
|
|
{
|
|
p_msc->ep_out = p_endpoint->bEndpointAddress;
|
|
}
|
|
|
|
p_endpoint = (tusb_desc_endpoint_t const *) descriptor_next( (uint8_t const*) p_endpoint );
|
|
}
|
|
|
|
p_msc->interface_num = p_interface_desc->bInterfaceNumber;
|
|
|
|
(*p_length) += sizeof(tusb_desc_interface_t) + 2*sizeof(tusb_desc_endpoint_t);
|
|
|
|
//------------- Queue Endpoint OUT for Command Block Wrapper -------------//
|
|
TU_ASSERT( dcd_edpt_xfer(rhport, p_msc->ep_out, (uint8_t*) &p_msc->cbw, sizeof(msc_cbw_t)), TUSB_ERROR_DCD_EDPT_XFER );
|
|
|
|
return TUSB_ERROR_NONE;
|
|
}
|
|
|
|
tusb_error_t mscd_control_request_st(uint8_t rhport, tusb_control_request_t const * p_request)
|
|
{
|
|
OSAL_SUBTASK_BEGIN
|
|
|
|
tusb_error_t err;
|
|
|
|
TU_ASSERT(p_request->bmRequestType_bit.type == TUSB_REQ_TYPE_CLASS, TUSB_ERROR_DCD_CONTROL_REQUEST_NOT_SUPPORT);
|
|
|
|
mscd_interface_t * p_msc = &mscd_data;
|
|
|
|
if(MSC_REQUEST_RESET == p_request->bRequest)
|
|
{
|
|
dcd_control_status(rhport, p_request->bmRequestType_bit.direction);
|
|
}
|
|
else if (MSC_REQUEST_GET_MAX_LUN == p_request->bRequest)
|
|
{
|
|
// Note: lpc11/13u need xfer data's address to be aligned 64 -> make use of scsi_data instead of using max_lun directly
|
|
p_msc->scsi_data[0] = p_msc->max_lun;
|
|
usbd_control_xfer_st(rhport, p_request->bmRequestType_bit.direction, p_msc->scsi_data, 1);
|
|
}else
|
|
{
|
|
dcd_control_stall(rhport); // stall unsupported request
|
|
}
|
|
|
|
OSAL_SUBTASK_END
|
|
}
|
|
|
|
//--------------------------------------------------------------------+
|
|
// MSCD APPLICATION CALLBACK
|
|
//--------------------------------------------------------------------+
|
|
tusb_error_t mscd_xfer_cb(uint8_t rhport, uint8_t ep_addr, tusb_event_t event, uint32_t xferred_bytes)
|
|
{
|
|
mscd_interface_t* const p_msc = &mscd_data;
|
|
msc_cbw_t* const p_cbw = &p_msc->cbw;
|
|
msc_csw_t* const p_csw = &p_msc->csw;
|
|
|
|
VERIFY( (ep_addr == p_msc->ep_out) || (ep_addr == p_msc->ep_in), TUSB_ERROR_INVALID_PARA);
|
|
|
|
switch (p_msc->stage)
|
|
{
|
|
//------------- new CBW received -------------//
|
|
case MSC_STAGE_CMD:
|
|
// Complete IN while waiting for CMD is usually Status of previous SCSI op, ignore it
|
|
if(ep_addr != p_msc->ep_out) return TUSB_ERROR_NONE;
|
|
|
|
TU_ASSERT( event == TUSB_EVENT_XFER_COMPLETE &&
|
|
xferred_bytes == sizeof(msc_cbw_t) && p_cbw->signature == MSC_CBW_SIGNATURE, TUSB_ERROR_INVALID_PARA );
|
|
|
|
p_csw->signature = MSC_CSW_SIGNATURE;
|
|
p_csw->tag = p_cbw->tag;
|
|
p_csw->data_residue = 0;
|
|
|
|
// Valid command -> move to Data Stage
|
|
p_msc->stage = MSC_STAGE_DATA;
|
|
p_msc->data_len = p_cbw->xfer_bytes;
|
|
p_msc->xferred_len = 0;
|
|
|
|
if ( (SCSI_CMD_READ_10 == p_cbw->command[0]) || (SCSI_CMD_WRITE_10 == p_cbw->command[0]) )
|
|
{
|
|
// Read10 & Write10 data len is same as CBW's xfer bytes
|
|
read10_write10_data_xfer(rhport, p_msc);
|
|
}
|
|
else
|
|
{
|
|
// If not read10 & write10, invoke application callback
|
|
void const *p_buffer = NULL;
|
|
|
|
// TODO SCSI data out transfer is not yet supported
|
|
TU_ASSERT( !(p_cbw->xfer_bytes > 0 && !BIT_TEST_(p_cbw->dir, 7)), TUSB_ERROR_NOT_SUPPORTED_YET);
|
|
|
|
p_csw->status = tud_msc_scsi_cb(rhport, p_cbw->lun, p_cbw->command, &p_buffer, &p_msc->data_len);
|
|
|
|
if ( p_cbw->xfer_bytes == 0)
|
|
{
|
|
// There is no DATA, move to Status Stage
|
|
p_msc->stage = MSC_STAGE_STATUS;
|
|
}
|
|
else
|
|
{
|
|
// Data Phase (non READ10, WRITE10)
|
|
TU_ASSERT( p_cbw->xfer_bytes >= p_msc->data_len, TUSB_ERROR_INVALID_PARA );
|
|
TU_ASSERT( sizeof(p_msc->scsi_data) >= p_msc->data_len, TUSB_ERROR_NOT_ENOUGH_MEMORY); // needs to increase size for scsi_data
|
|
|
|
uint8_t const ep_data = BIT_TEST_(p_cbw->dir, 7) ? p_msc->ep_in : p_msc->ep_out;
|
|
|
|
if ( p_buffer == NULL || p_msc->data_len == 0 )
|
|
{
|
|
// application does not provide data to response --> possibly unsupported SCSI command
|
|
dcd_edpt_stall(rhport, ep_data);
|
|
p_csw->status = MSC_CSW_STATUS_FAILED;
|
|
|
|
p_msc->stage = MSC_STAGE_STATUS;
|
|
}else
|
|
{
|
|
memcpy(p_msc->scsi_data, p_buffer, p_msc->data_len);
|
|
TU_ASSERT( dcd_edpt_xfer(rhport, ep_data, p_msc->scsi_data, p_msc->data_len), TUSB_ERROR_DCD_EDPT_XFER );
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
|
|
case MSC_STAGE_DATA:
|
|
p_msc->xferred_len += xferred_bytes;
|
|
|
|
// Data Stage is complete
|
|
if ( p_msc->xferred_len == p_msc->data_len )
|
|
{
|
|
p_msc->stage = MSC_STAGE_STATUS;
|
|
}
|
|
else if ( (SCSI_CMD_READ_10 == p_cbw->command[0]) || (SCSI_CMD_WRITE_10 == p_cbw->command[0]) )
|
|
{
|
|
// Can be executed several times e.g write 8K bytes (several flash write)
|
|
read10_write10_data_xfer(rhport, p_msc);
|
|
}else
|
|
{
|
|
// unlikely error
|
|
verify_breakpoint();
|
|
}
|
|
break;
|
|
|
|
case MSC_STAGE_STATUS: break; // is processed immediately
|
|
default : break;
|
|
}
|
|
|
|
if ( p_msc->stage == MSC_STAGE_STATUS )
|
|
{
|
|
// Move to default CMD stage after sending status
|
|
p_msc->stage = MSC_STAGE_CMD;
|
|
|
|
TU_ASSERT( dcd_edpt_xfer(rhport, p_msc->ep_in , (uint8_t*) &p_msc->csw, sizeof(msc_csw_t)) );
|
|
|
|
//------------- Queue the next CBW -------------//
|
|
TU_ASSERT( dcd_edpt_xfer(rhport, p_msc->ep_out, (uint8_t*) &p_msc->cbw, sizeof(msc_cbw_t)) );
|
|
}
|
|
|
|
return TUSB_ERROR_NONE;
|
|
}
|
|
|
|
// return true if data phase is complete, false if not yet complete
|
|
static bool read10_write10_data_xfer(uint8_t rhport, mscd_interface_t* p_msc)
|
|
{
|
|
msc_cbw_t* const p_cbw = &p_msc->cbw;
|
|
msc_csw_t* const p_csw = &p_msc->csw;
|
|
|
|
// read10 & write10 has the same format
|
|
scsi_read10_t* p_readwrite = (scsi_read10_t*) &p_cbw->command;
|
|
|
|
uint8_t const ep_data = BIT_TEST_(p_cbw->dir, 7) ? p_msc->ep_in : p_msc->ep_out;
|
|
|
|
uint32_t lba = __be2n(p_readwrite->lba);
|
|
uint16_t block_count = __be2n_16(p_readwrite->block_count);
|
|
uint16_t const block_size = p_cbw->xfer_bytes / block_count;
|
|
|
|
// Adjust lba and block count according to byte transferred so far
|
|
lba += (p_msc->xferred_len / block_size);
|
|
block_count -= (p_msc->xferred_len / block_size);
|
|
|
|
void *p_buffer = NULL;
|
|
uint16_t xfer_block;
|
|
|
|
if (SCSI_CMD_READ_10 == p_cbw->command[0])
|
|
{
|
|
xfer_block = tud_msc_read10_cb (rhport, p_cbw->lun, &p_buffer, lba, block_count);
|
|
}else
|
|
{
|
|
xfer_block = tud_msc_write10_cb(rhport, p_cbw->lun, &p_buffer, lba, block_count);
|
|
}
|
|
|
|
xfer_block = min16_of(xfer_block, block_count);
|
|
|
|
if ( 0 == xfer_block )
|
|
{
|
|
// xferred_block is zero will cause pipe is stalled & status in CSW set to failed
|
|
p_csw->data_residue = p_cbw->xfer_bytes;
|
|
p_csw->status = MSC_CSW_STATUS_FAILED;
|
|
|
|
dcd_edpt_stall(rhport, ep_data);
|
|
|
|
return true;
|
|
}else
|
|
{
|
|
TU_ASSERT( dcd_edpt_xfer(rhport, ep_data, p_buffer, xfer_block * block_size) );
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
#endif
|