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/*
* The MIT License (MIT)
*
* Copyright (c) 2019 Ha Thach (tinyusb.org)
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*
* This file is part of the TinyUSB stack.
*/
#include "tusb_option.h"
#if TUSB_OPT_DEVICE_ENABLED
#include "tusb.h"
#include "device/usbd_pvt.h"
#include "dcd.h"
enum
{
EDPT_CTRL_OUT = 0x00,
EDPT_CTRL_IN = 0x80
};
typedef struct
{
tusb_control_request_t request;
void* buffer;
uint16_t total_len;
uint16_t total_transferred;
bool (*complete_cb) (uint8_t, tusb_control_request_t const *);
} usbd_control_xfer_t;
static usbd_control_xfer_t _control_state;
CFG_TUSB_MEM_SECTION CFG_TUSB_MEM_ALIGN uint8_t _usbd_ctrl_buf[CFG_TUD_ENDOINT0_SIZE];
void usbd_control_reset (uint8_t rhport)
{
(void) rhport;
tu_varclr(&_control_state);
}
bool usbd_control_status(uint8_t rhport, tusb_control_request_t const * request)
{
// status direction is reversed to one in the setup packet
return dcd_edpt_xfer(rhport, request->bmRequestType_bit.direction ? EDPT_CTRL_OUT : EDPT_CTRL_IN, NULL, 0);
}
// Each transaction is up to endpoint0's max packet size
static bool start_control_data_xact(uint8_t rhport)
{
uint16_t const xact_len = tu_min16(_control_state.total_len - _control_state.total_transferred, CFG_TUD_ENDOINT0_SIZE);
uint8_t ep_addr = EDPT_CTRL_OUT;
if ( _control_state.request.bmRequestType_bit.direction == TUSB_DIR_IN )
{
ep_addr = EDPT_CTRL_IN;
memcpy(_usbd_ctrl_buf, _control_state.buffer, xact_len);
}
return dcd_edpt_xfer(rhport, ep_addr, _usbd_ctrl_buf, xact_len);
}
// TODO may find a better way
void usbd_control_set_complete_callback( bool (*fp) (uint8_t, tusb_control_request_t const * ) )
{
_control_state.complete_cb = fp;
}
bool usbd_control_xfer(uint8_t rhport, tusb_control_request_t const * request, void* buffer, uint16_t len)
{
_control_state.request = (*request);
_control_state.buffer = buffer;
_control_state.total_len = tu_min16(len, request->wLength);
_control_state.total_transferred = 0;
if ( len )
{
TU_ASSERT(buffer);
// Data stage
TU_ASSERT( start_control_data_xact(rhport) );
}else
{
// Status stage
TU_ASSERT( usbd_control_status(rhport, request) );
}
return true;
}
// callback when a transaction complete on DATA stage of control endpoint
bool usbd_control_xfer_cb (uint8_t rhport, uint8_t ep_addr, xfer_result_t result, uint32_t xferred_bytes)
{
(void) result;
(void) ep_addr;
if ( _control_state.request.bmRequestType_bit.direction == TUSB_DIR_OUT )
{
TU_VERIFY(_control_state.buffer);
memcpy(_control_state.buffer, _usbd_ctrl_buf, xferred_bytes);
}
_control_state.total_transferred += xferred_bytes;
_control_state.buffer += xferred_bytes;
if ( _control_state.total_len == _control_state.total_transferred || xferred_bytes < CFG_TUD_ENDOINT0_SIZE )
{
// DATA stage is complete
bool is_ok = true;
// invoke complete callback if set
// callback can still stall control in status phase e.g out data does not make sense
if ( _control_state.complete_cb )
{
is_ok = _control_state.complete_cb(rhport, &_control_state.request);
}
if ( is_ok )
{
// Send status
TU_ASSERT( usbd_control_status(rhport, &_control_state.request) );
}else
{
// Stall both IN and OUT control endpoint
dcd_edpt_stall(rhport, EDPT_CTRL_OUT);
dcd_edpt_stall(rhport, EDPT_CTRL_IN);
}
}
else
{
// More data to transfer
TU_ASSERT( start_control_data_xact(rhport) );
}
return true;
}
#endif
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