simmel-bootloader/src/usb/msc_uf2.c

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/**************************************************************************/
/*!
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@file msc_uf2.c
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@author hathach (tinyusb.org)
@section LICENSE
Software License Agreement (BSD License)
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Copyright (c) 2018, Adafruit Industries (adafruit.com)
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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.
*/
/**************************************************************************/
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#include "msc_uf2.h"
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#if CFG_TUD_MSC
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#include "pstorage.h"
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/*------------------------------------------------------------------*/
/* MACRO TYPEDEF CONSTANT ENUM
*------------------------------------------------------------------*/
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/*------------------------------------------------------------------*/
/* UF2
*------------------------------------------------------------------*/
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void read_block(uint32_t block_no, uint8_t *data);
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int write_block(uint32_t block_no, uint8_t *data, bool quiet/*, WriteState *state*/);
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/*------------------------------------------------------------------*/
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/* VARIABLES
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*------------------------------------------------------------------*/
static scsi_sense_fixed_data_t mscd_sense_data =
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{
.response_code = 0x70,
.sense_key = 0, // no errors
.additional_sense_len = sizeof(scsi_sense_fixed_data_t) - 8
};
static scsi_mode_parameters_t const msc_dev_mode_para =
{
.mode_data_length = 3,
.medium_type = 0,
.device_specific_para = 0,
.block_descriptor_length = 0
};
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/*------------------------------------------------------------------*/
/* API
*------------------------------------------------------------------*/
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void msc_uf2_init(void)
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{
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}
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void msc_uf2_mount(void)
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{
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}
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void msc_uf2_umount(void)
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{
}
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//--------------------------------------------------------------------+
// tinyusb callbacks
//--------------------------------------------------------------------+
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int32_t tud_msc_scsi_cb (uint8_t rhport, uint8_t lun, uint8_t const scsi_cmd[16], void* buffer, uint16_t bufsize)
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{
// read10 & write10 has their own callback and MUST not be handled here
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void const* ptr = NULL;
uint16_t len = 0;
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// most scsi handled is input
bool in_xfer = true;
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switch (scsi_cmd[0])
{
case SCSI_CMD_REQUEST_SENSE:
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ptr = &mscd_sense_data;
len = sizeof(scsi_sense_fixed_data_t);
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break;
case SCSI_CMD_MODE_SENSE_6:
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ptr = &msc_dev_mode_para;
len = sizeof(msc_dev_mode_para);
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break;
case SCSI_CMD_TEST_UNIT_READY:
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ptr = NULL;
len = 0;
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break;
case SCSI_CMD_PREVENT_ALLOW_MEDIUM_REMOVAL:
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ptr = NULL;
len = 0;
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break;
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default:
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// negative is error -> Data stage is STALL, status = failed
return -1;
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}
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// return len must not larger than bufsize
TU_ASSERT( bufsize >= len );
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if ( ptr && len )
{
if(in_xfer)
{
memcpy(buffer, ptr, len);
}else
{
// SCSI output
}
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}
//------------- clear sense data if it is not request sense command -------------//
if ( SCSI_CMD_REQUEST_SENSE != scsi_cmd[0] )
{
mscd_sense_data.sense_key = SCSI_SENSEKEY_NONE;
mscd_sense_data.additional_sense_code = 0;
mscd_sense_data.additional_sense_qualifier = 0;
}
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return len;
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}
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/*------------------------------------------------------------------*/
/* Tinyusb Flash READ10 & WRITE10
*------------------------------------------------------------------*/
int32_t tud_msc_read10_cb (uint8_t rhport, uint8_t lun, uint32_t lba, uint32_t offset, void* buffer, uint32_t bufsize)
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{
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(void) rhport; (void) lun;
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// since we return block size each, offset should always be zero
TU_ASSERT(offset == 0, -1);
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uint32_t count = 0;
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while ( count < bufsize )
{
read_block(lba, buffer);
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lba++;
buffer += 512;
count += 512;
}
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return count;
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}
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int32_t tud_msc_write10_cb (uint8_t rhport, uint8_t lun, uint32_t lba, uint32_t offset, void* buffer, uint32_t bufsize)
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{
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(void) rhport; (void) lun;
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uint32_t count = 0;
int wr_ret;
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while ( (count < bufsize) && ((wr_ret = write_block(lba, buffer, false)) > 0) )
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{
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lba++;
buffer += 512;
count += 512;
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}
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// Consider non-uf2 block write as successful
return (wr_ret < 0) ? bufsize : count;
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}
#endif