/**
  ******************************************************************************
  * @file           : usbd_conf.c
  * @brief          : This file implements the board support package for the USB device library
  ******************************************************************************
  *
  * COPYRIGHT(c) 2015 STMicroelectronics
  *
  * 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 STMicroelectronics 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 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 HOLDER 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.
  *
  ******************************************************************************
*/
#include "os_io_seproxyhal.h"
#include "os_helpers.h"
/* Includes ------------------------------------------------------------------*/
#include "usbd_def.h"
#include "usbd_core.h"


/*******************************************************************************
                       LL Driver Interface (USB Device Library --> PCD)
*******************************************************************************/
unsigned int ep_in_stall;
unsigned int ep_out_stall;
/**
  * @brief  Initializes the Low Level portion of the Device driver.
  * @param  pdev: Device handle
  * @retval USBD Status
  */
USBD_StatusTypeDef  USBD_LL_Init (USBD_HandleTypeDef *pdev)
{ 
  UNUSED(pdev);
  ep_in_stall = 0;
  ep_out_stall = 0;
  return USBD_OK;
}

/**
  * @brief  De-Initializes the Low Level portion of the Device driver.
  * @param  pdev: Device handle
  * @retval USBD Status
  */
USBD_StatusTypeDef  USBD_LL_DeInit (USBD_HandleTypeDef *pdev)
{
  uint8_t buffer[4];
  UNUSED(pdev);

  // usb off
  buffer[0] = SEPROXYHAL_TAG_USB_CONFIG;
  buffer[1] = 0;
  buffer[2] = 1;
  buffer[3] = SEPROXYHAL_TAG_USB_CONFIG_DISCONNECT;
  io_seproxyhal_spi_send(buffer, 4);

  return USBD_OK; 
}

/**
  * @brief  Starts the Low Level portion of the Device driver. 
  * @param  pdev: Device handle
  * @retval USBD Status
  */
USBD_StatusTypeDef  USBD_LL_Start(USBD_HandleTypeDef *pdev)
{
  uint8_t buffer[5];
  UNUSED(pdev);

  // reset address
  buffer[0] = SEPROXYHAL_TAG_USB_CONFIG;
  buffer[1] = 0;
  buffer[2] = 2;
  buffer[3] = SEPROXYHAL_TAG_USB_CONFIG_ADDR;
  buffer[4] = 0;
  io_seproxyhal_spi_send(buffer, 5);
  
  // start usb operation
  buffer[0] = SEPROXYHAL_TAG_USB_CONFIG;
  buffer[1] = 0;
  buffer[2] = 1;
  buffer[3] = SEPROXYHAL_TAG_USB_CONFIG_CONNECT;
  io_seproxyhal_spi_send(buffer, 4);
  return USBD_OK; 
}

/**
  * @brief  Stops the Low Level portion of the Device driver.
  * @param  pdev: Device handle
  * @retval USBD Status
  */
USBD_StatusTypeDef  USBD_LL_Stop (USBD_HandleTypeDef *pdev)
{
  UNUSED(pdev);
  uint8_t buffer[4];
  buffer[0] = SEPROXYHAL_TAG_USB_CONFIG;
  buffer[1] = 0;
  buffer[2] = 1;
  buffer[3] = SEPROXYHAL_TAG_USB_CONFIG_DISCONNECT;
  io_seproxyhal_spi_send(buffer, 4);
  return USBD_OK; 
}

/**
  * @brief  Opens an endpoint of the Low Level Driver.
  * @param  pdev: Device handle
  * @param  ep_addr: Endpoint Number
  * @param  ep_type: Endpoint Type
  * @param  ep_mps: Endpoint Max Packet Size
  * @retval USBD Status
  */
USBD_StatusTypeDef  USBD_LL_OpenEP  (USBD_HandleTypeDef *pdev, 
                                      uint8_t  ep_addr,                                      
                                      uint8_t  ep_type,
                                      uint16_t ep_mps)
{
  uint8_t buffer[8];
  UNUSED(pdev);

  ep_in_stall = 0;
  ep_out_stall = 0;

  buffer[0] = SEPROXYHAL_TAG_USB_CONFIG;
  buffer[1] = 0;
  buffer[2] = 5;
  buffer[3] = SEPROXYHAL_TAG_USB_CONFIG_ENDPOINTS;
  buffer[4] = 1;
  buffer[5] = ep_addr;
  buffer[6] = 0;
  switch(ep_type) {
    case USBD_EP_TYPE_CTRL:
      buffer[6] = SEPROXYHAL_TAG_USB_CONFIG_TYPE_CONTROL;
      break;
    case USBD_EP_TYPE_ISOC:
      buffer[6] = SEPROXYHAL_TAG_USB_CONFIG_TYPE_ISOCHRONOUS;
      break;
    case USBD_EP_TYPE_BULK:
      buffer[6] = SEPROXYHAL_TAG_USB_CONFIG_TYPE_BULK;
      break;
    case USBD_EP_TYPE_INTR:
      buffer[6] = SEPROXYHAL_TAG_USB_CONFIG_TYPE_INTERRUPT;
      break;
  }
  buffer[7] = ep_mps;
  io_seproxyhal_spi_send(buffer, 8);
  return USBD_OK; 
}

/**
  * @brief  Closes an endpoint of the Low Level Driver.
  * @param  pdev: Device handle
  * @param  ep_addr: Endpoint Number
  * @retval USBD Status
  */
USBD_StatusTypeDef  USBD_LL_CloseEP (USBD_HandleTypeDef *pdev, uint8_t ep_addr)   
{
  UNUSED(pdev);
  uint8_t buffer[8];
  buffer[0] = SEPROXYHAL_TAG_USB_CONFIG;
  buffer[1] = 0;
  buffer[2] = 5;
  buffer[3] = SEPROXYHAL_TAG_USB_CONFIG_ENDPOINTS;
  buffer[4] = 1;
  buffer[5] = ep_addr;
  buffer[6] = SEPROXYHAL_TAG_USB_CONFIG_TYPE_DISABLED;
  buffer[7] = 0;
  io_seproxyhal_spi_send(buffer, 8);
  return USBD_OK; 
}

/**
  * @brief  Flushes an endpoint of the Low Level Driver.
  * @param  pdev: Device handle
  * @param  ep_addr: Endpoint Number
  * @retval USBD Status
  */
USBD_StatusTypeDef  USBD_LL_FlushEP (USBD_HandleTypeDef *pdev, uint8_t ep_addr)   
{
  UNUSED(pdev);
  UNUSED(ep_addr);
  //HAL_PCD_EP_Flush(pdev->pData, ep_addr);
  return USBD_OK; 
}

/**
  * @brief  Sets a Stall condition on an endpoint of the Low Level Driver.
  * @param  pdev: Device handle
  * @param  ep_addr: Endpoint Number
  * @retval USBD Status
  */
USBD_StatusTypeDef  USBD_LL_StallEP (USBD_HandleTypeDef *pdev, uint8_t ep_addr)   
{ 
  UNUSED(pdev);
  uint8_t buffer[6];
  buffer[0] = SEPROXYHAL_TAG_USB_EP_PREPARE;
  buffer[1] = 0;
  buffer[2] = 3;
  buffer[3] = ep_addr;
  buffer[4] = SEPROXYHAL_TAG_USB_EP_PREPARE_DIR_STALL;
  buffer[5] = 0;
  io_seproxyhal_spi_send(buffer, 6);
  if (ep_addr & 0x80) {
    ep_in_stall |= (1<<(ep_addr&0x7F));
  }
  else {
    ep_out_stall |= (1<<(ep_addr&0x7F)); 
  }
  return USBD_OK; 
}

/**
  * @brief  Clears a Stall condition on an endpoint of the Low Level Driver.
  * @param  pdev: Device handle
  * @param  ep_addr: Endpoint Number
  * @retval USBD Status
  */
USBD_StatusTypeDef  USBD_LL_ClearStallEP (USBD_HandleTypeDef *pdev, uint8_t ep_addr)   
{
  UNUSED(pdev);
  uint8_t buffer[6];
  buffer[0] = SEPROXYHAL_TAG_USB_EP_PREPARE;
  buffer[1] = 0;
  buffer[2] = 3;
  buffer[3] = ep_addr;
  buffer[4] = SEPROXYHAL_TAG_USB_EP_PREPARE_DIR_UNSTALL;
  buffer[5] = 0;
  io_seproxyhal_spi_send(buffer, 6);
  if (ep_addr & 0x80) {
    ep_in_stall &= ~(1<<(ep_addr&0x7F));
  }
  else {
    ep_out_stall &= ~(1<<(ep_addr&0x7F)); 
  }
  return USBD_OK; 
}

/**
  * @brief  Returns Stall condition.
  * @param  pdev: Device handle
  * @param  ep_addr: Endpoint Number
  * @retval Stall (1: Yes, 0: No)
  */
uint8_t USBD_LL_IsStallEP (USBD_HandleTypeDef *pdev, uint8_t ep_addr)   
{
  UNUSED(pdev);
  if((ep_addr & 0x80) == 0x80)
  {
    return ep_in_stall & (1<<(ep_addr&0x7F));
  }
  else
  {
    return ep_out_stall & (1<<(ep_addr&0x7F));
  }
}
/**
  * @brief  Assigns a USB address to the device.
  * @param  pdev: Device handle
  * @param  ep_addr: Endpoint Number
  * @retval USBD Status
  */
USBD_StatusTypeDef  USBD_LL_SetUSBAddress (USBD_HandleTypeDef *pdev, uint8_t dev_addr)   
{
  UNUSED(pdev);
  uint8_t buffer[5];
  buffer[0] = SEPROXYHAL_TAG_USB_CONFIG;
  buffer[1] = 0;
  buffer[2] = 2;
  buffer[3] = SEPROXYHAL_TAG_USB_CONFIG_ADDR;
  buffer[4] = dev_addr;
  io_seproxyhal_spi_send(buffer, 5);
  return USBD_OK; 
}

/**
  * @brief  Transmits data over an endpoint.
  * @param  pdev: Device handle
  * @param  ep_addr: Endpoint Number
  * @param  pbuf: Pointer to data to be sent
  * @param  size: Data size    
  * @retval USBD Status
  */
USBD_StatusTypeDef  USBD_LL_Transmit (USBD_HandleTypeDef *pdev, 
                                      uint8_t  ep_addr,                                      
                                      uint8_t  *pbuf,
                                      uint16_t  size)
{
  UNUSED(pdev);
  uint8_t buffer[6];
  buffer[0] = SEPROXYHAL_TAG_USB_EP_PREPARE;
  buffer[1] = (3+size)>>8;
  buffer[2] = (3+size);
  buffer[3] = ep_addr;
  buffer[4] = SEPROXYHAL_TAG_USB_EP_PREPARE_DIR_IN;
  buffer[5] = size;
  io_seproxyhal_spi_send(buffer, 6);
  io_seproxyhal_spi_send(pbuf, size);
  return USBD_OK;   
}

/**
  * @brief  Prepares an endpoint for reception.
  * @param  pdev: Device handle
  * @param  ep_addr: Endpoint Number
  * @param  pbuf: Pointer to data to be received
  * @param  size: Data size
  * @retval USBD Status
  */
USBD_StatusTypeDef  USBD_LL_PrepareReceive(USBD_HandleTypeDef *pdev, 
                                           uint8_t  ep_addr,
                                           uint16_t  size)
{
  UNUSED(pdev);
  uint8_t buffer[6];
  buffer[0] = SEPROXYHAL_TAG_USB_EP_PREPARE;
  buffer[1] = (3/*+size*/)>>8;
  buffer[2] = (3/*+size*/);
  buffer[3] = ep_addr;
  buffer[4] = SEPROXYHAL_TAG_USB_EP_PREPARE_DIR_OUT;
  buffer[5] = size; // expected size, not transmitted here !
  io_seproxyhal_spi_send(buffer, 6);
  return USBD_OK;   
}


/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/