187 lines
7.4 KiB
C
187 lines
7.4 KiB
C
/**************************************************************************/
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/*!
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@file msc_device.c
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@author hathach (tinyusb.org)
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@section LICENSE
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Software License Agreement (BSD License)
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Copyright (c) 2013, hathach (tinyusb.org)
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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1. Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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3. Neither the name of the copyright holders nor the
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names of its contributors may be used to endorse or promote products
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derived from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ''AS IS'' AND ANY
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EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE FOR ANY
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DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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This file is part of the tinyusb stack.
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*/
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/**************************************************************************/
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#include "tusb_option.h"
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#if (MODE_DEVICE_SUPPORTED && TUSB_CFG_DEVICE_MSC)
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#define _TINY_USB_SOURCE_FILE_
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//--------------------------------------------------------------------+
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// INCLUDE
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//--------------------------------------------------------------------+
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#include "common/common.h"
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#include "msc_device.h"
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#include "tusb_descriptors.h"
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//--------------------------------------------------------------------+
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// MACRO CONSTANT TYPEDEF
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//--------------------------------------------------------------------+
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typedef struct {
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uint8_t interface_number;
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endpoint_handle_t edpt_in, edpt_out;
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// must be in USB ram
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ATTR_USB_MIN_ALIGNMENT uint8_t max_lun; // can STALL for one LUN
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ATTR_USB_MIN_ALIGNMENT msc_cmd_block_wrapper_t cbw;
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ATTR_USB_MIN_ALIGNMENT msc_cmd_status_wrapper_t csw;
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}mscd_interface_t;
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STATIC_VAR mscd_interface_t mscd_data TUSB_CFG_ATTR_USBRAM;
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//--------------------------------------------------------------------+
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// INTERNAL OBJECT & FUNCTION DECLARATION
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//--------------------------------------------------------------------+
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//--------------------------------------------------------------------+
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// USBD-CLASS API
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//--------------------------------------------------------------------+
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void mscd_init(void)
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{
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// TODO not implemented
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}
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void mscd_bus_reset(uint8_t coreid)
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{
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// TODO not implemented yet
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}
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tusb_error_t mscd_open(uint8_t coreid, tusb_descriptor_interface_t const * p_interface_desc, uint16_t *p_length)
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{
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ASSERT( ( MSC_SUBCLASS_SCSI == p_interface_desc->bInterfaceSubClass &&
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MSC_PROTOCOL_BOT == p_interface_desc->bInterfaceProtocol ), TUSB_ERROR_MSC_UNSUPPORTED_PROTOCOL );
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mscd_interface_t * p_msc = &mscd_data;
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//------------- Open Data Pipe -------------//
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tusb_descriptor_endpoint_t const *p_endpoint = (tusb_descriptor_endpoint_t const *) descriptor_next( (uint8_t const*) p_interface_desc );
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for(uint32_t i=0; i<2; i++)
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{
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ASSERT(TUSB_DESC_TYPE_ENDPOINT == p_endpoint->bDescriptorType &&
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TUSB_XFER_BULK == p_endpoint->bmAttributes.xfer, TUSB_ERROR_DESCRIPTOR_CORRUPTED);
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endpoint_handle_t * p_edpt_hdl = ( p_endpoint->bEndpointAddress & TUSB_DIR_DEV_TO_HOST_MASK ) ?
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&p_msc->edpt_in : &p_msc->edpt_out;
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(*p_edpt_hdl) = dcd_pipe_open(coreid, p_endpoint, p_interface_desc->bInterfaceClass);
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ASSERT( endpointhandle_is_valid(*p_edpt_hdl), TUSB_ERROR_DCD_FAILED);
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p_endpoint = (tusb_descriptor_endpoint_t const *) descriptor_next( (uint8_t const*) p_endpoint );
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}
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p_msc->interface_number = p_interface_desc->bInterfaceNumber;
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(*p_length) += sizeof(tusb_descriptor_interface_t) + 2*sizeof(tusb_descriptor_endpoint_t);
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//------------- Queue Endpoint OUT for Command Block Wrapper -------------//
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ASSERT_STATUS( dcd_pipe_xfer(p_msc->edpt_out, &p_msc->cbw, sizeof(msc_cmd_block_wrapper_t), true) );
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return TUSB_ERROR_NONE;
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}
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tusb_error_t mscd_control_request(uint8_t coreid, tusb_control_request_t const * p_request)
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{
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ASSERT(p_request->bmRequestType_bit.type == TUSB_REQUEST_TYPE_CLASS, TUSB_ERROR_DCD_CONTROL_REQUEST_NOT_SUPPORT);
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mscd_interface_t * p_msc = &mscd_data;
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switch(p_request->bRequest)
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{
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case MSC_REQUEST_RESET:
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dcd_pipe_control_xfer(coreid, TUSB_DIR_HOST_TO_DEV, NULL, 0);
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break;
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case MSC_REQUEST_GET_MAX_LUN:
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dcd_pipe_control_xfer(coreid, TUSB_DIR_DEV_TO_HOST, &p_msc->max_lun, 1);
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break;
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default:
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return TUSB_ERROR_DCD_CONTROL_REQUEST_NOT_SUPPORT;
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}
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return TUSB_ERROR_NONE;
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}
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void mscd_isr(endpoint_handle_t edpt_hdl, tusb_event_t event, uint32_t xferred_bytes)
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{
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// TODO failed --> STALL pipe, on clear STALL --> queue endpoint OUT
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mscd_interface_t * p_msc = &mscd_data;
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if ( endpointhandle_is_equal(p_msc->edpt_in, edpt_hdl) )
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{
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return; // currently no need to handle bulk in
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}
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ASSERT( endpointhandle_is_equal(p_msc->edpt_out, edpt_hdl) &&
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xferred_bytes == sizeof(msc_cmd_block_wrapper_t) &&
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event == TUSB_EVENT_XFER_COMPLETE &&
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p_msc->cbw.signature == MSC_CBW_SIGNATURE, VOID_RETURN );
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void *p_buffer = NULL;
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uint16_t actual_length = p_msc->cbw.xfer_bytes;
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p_msc->csw.signature = MSC_CSW_SIGNATURE;
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p_msc->csw.tag = p_msc->cbw.tag;
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p_msc->csw.status = tusbd_msc_scsi_received_isr(edpt_hdl.coreid, p_msc->cbw.lun, p_msc->cbw.command, &p_buffer, &actual_length);
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p_msc->csw.data_residue = 0; // TODO expected length, response length
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ASSERT( p_msc->cbw.xfer_bytes >= actual_length, VOID_RETURN );
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//------------- Data Phase -------------//
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if ( p_msc->cbw.xfer_bytes )
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{
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if ( p_buffer == NULL || actual_length == 0 )
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{ // application does not provide data to response --> possibly unsupported SCSI command
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ASSERT( TUSB_ERROR_NONE == dcd_pipe_stall(p_msc->edpt_in), VOID_RETURN );
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p_msc->csw.status = MSC_CSW_STATUS_FAILED;
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}else
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{
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ASSERT( dcd_pipe_queue_xfer( BIT_TEST_(p_msc->cbw.dir, 7) ? p_msc->edpt_in : p_msc->edpt_out,
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p_buffer, actual_length) == TUSB_ERROR_NONE, VOID_RETURN);
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}
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}
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//------------- Status Phase -------------//
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ASSERT( dcd_pipe_xfer( p_msc->edpt_in , &p_msc->csw, sizeof(msc_cmd_status_wrapper_t), true) == TUSB_ERROR_NONE, VOID_RETURN ); // need to be true for dcd to clean up qtd !!
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//------------- Queue the next CBW -------------//
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ASSERT( dcd_pipe_xfer( p_msc->edpt_out, &p_msc->cbw, sizeof(msc_cmd_block_wrapper_t), true) == TUSB_ERROR_NONE, VOID_RETURN );
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}
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#endif
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