/**
* @brief USBH_LL_Disconnect
* Handle USB Host disconnection event
* @param phost: Host Handle
* @retval USBH_Status
*/
USBH_StatusTypeDef USBH_LL_Disconnect (USBH_HandleTypeDef *phost)
{
/*Stop Host */
USBH_LL_Stop(phost);
/* FRee Control Pipes */
USBH_FreePipe (phost, phost->Control.pipe_in);
USBH_FreePipe (phost, phost->Control.pipe_out);
phost->device.is_connected = 0;
if(phost->pUser != NULL)
{
phost->pUser(phost, HOST_USER_DISCONNECTION);
}
USBH_UsrLog("USB Device disconnected");
/* Start the low level driver */
USBH_LL_Start(phost);
phost->gState = HOST_DEV_DISCONNECTED;
#if (USBH_USE_OS == 1)
osMessagePut ( phost->os_event, USBH_PORT_EVENT, 0);
#endif
return USBH_OK;
}
/**
* @brief USBH_Stop
* Stop the USB Host Core.
* @param phost: Host Handle
* @retval USBH Status
*/
USBH_StatusTypeDef USBH_Stop (USBH_HandleTypeDef *phost)
{
/* Stop and cleanup the low level driver */
USBH_LL_Stop(phost);
/* DeActivate VBUS on the port */
USBH_LL_DriverVBUS (phost, FALSE);
return USBH_OK;
}
/**
* @brief HCD_Init
* De-Initialize the Host portion of the driver.
* @param phost: Host Handle
* @retval USBH Status
*/
USBH_StatusTypeDef USBH_DeInit(USBH_HandleTypeDef *phost)
{
DeInitStateMachine(phost);
if(phost->pData != NULL)
{
phost->pActiveClass->pData = NULL;
USBH_LL_Stop(phost);
}
return USBH_OK;
}
/**
* @brief USBH_Stop
* Stop the USB Host Core.
* @param phost: Host Handle
* @retval USBH Status
*/
USBH_StatusTypeDef USBH_Stop (USBH_HandleTypeDef *phost)
{
/* Stop and cleanup the low level driver */
USBH_LL_Stop(phost);
/* DeActivate VBUS on the port */
USBH_LL_DriverVBUS (phost, FALSE);
/* FRee Control Pipes */
USBH_FreePipe (phost, phost->Control.pipe_in);
USBH_FreePipe (phost, phost->Control.pipe_out);
return USBH_OK;
}
/**
* @brief USBH_HandleControl
* Handles the USB control transfer state machine
* @param phost: Host Handle
* @retval USBH Status
*/
static USBH_StatusTypeDef USBH_HandleControl (USBH_HandleTypeDef *phost)
{
uint8_t direction;
USBH_StatusTypeDef status = USBH_BUSY;
USBH_URBStateTypeDef URB_Status = USBH_URB_IDLE;
switch (phost->Control.state)
{
case CTRL_SETUP:
/* send a SETUP packet */
USBH_CtlSendSetup (phost,
(uint8_t *)phost->Control.setup.d8 ,
phost->Control.pipe_out);
phost->Control.state = CTRL_SETUP_WAIT;
break;
case CTRL_SETUP_WAIT:
URB_Status = USBH_LL_GetURBState(phost, phost->Control.pipe_out);
/* case SETUP packet sent successfully */
if(URB_Status == USBH_URB_DONE)
{
direction = (phost->Control.setup.b.bmRequestType & USB_REQ_DIR_MASK);
/* check if there is a data stage */
if (phost->Control.setup.b.wLength.w != 0 )
{
if (direction == USB_D2H)
{
/* Data Direction is IN */
phost->Control.state = CTRL_DATA_IN;
}
else
{
/* Data Direction is OUT */
phost->Control.state = CTRL_DATA_OUT;
}
}
/* No DATA stage */
else
{
/* If there is No Data Transfer Stage */
if (direction == USB_D2H)
{
/* Data Direction is IN */
phost->Control.state = CTRL_STATUS_OUT;
}
else
{
/* Data Direction is OUT */
phost->Control.state = CTRL_STATUS_IN;
}
}
#if (USBH_USE_OS == 1)
osMessagePut ( phost->os_event, USBH_CONTROL_EVENT, 0);
#endif
}
else if(URB_Status == USBH_URB_ERROR)
{
phost->Control.state = CTRL_ERROR;
#if (USBH_USE_OS == 1)
osMessagePut ( phost->os_event, USBH_CONTROL_EVENT, 0);
#endif
}
break;
case CTRL_DATA_IN:
/* Issue an IN token */
phost->Control.timer = phost->Timer;
USBH_CtlReceiveData(phost,
phost->Control.buff,
phost->Control.length,
phost->Control.pipe_in);
phost->Control.state = CTRL_DATA_IN_WAIT;
break;
case CTRL_DATA_IN_WAIT:
URB_Status = USBH_LL_GetURBState(phost , phost->Control.pipe_in);
/* check is DATA packet transfered successfully */
if (URB_Status == USBH_URB_DONE)
{
phost->Control.state = CTRL_STATUS_OUT;
#if (USBH_USE_OS == 1)
osMessagePut ( phost->os_event, USBH_CONTROL_EVENT, 0);
#endif
}
/* manage error cases*/
if (URB_Status == USBH_URB_STALL)
{
/* In stall case, return to previous machine state*/
status = USBH_NOT_SUPPORTED;
#if (USBH_USE_OS == 1)
osMessagePut ( phost->os_event, USBH_CONTROL_EVENT, 0);
#endif
}
else if (URB_Status == USBH_URB_ERROR)
{
/* Device error */
phost->Control.state = CTRL_ERROR;
#if (USBH_USE_OS == 1)
osMessagePut ( phost->os_event, USBH_CONTROL_EVENT, 0);
#endif
}
break;
case CTRL_DATA_OUT:
USBH_CtlSendData (phost,
phost->Control.buff,
phost->Control.length ,
phost->Control.pipe_out,
1);
phost->Control.timer = phost->Timer;
phost->Control.state = CTRL_DATA_OUT_WAIT;
break;
case CTRL_DATA_OUT_WAIT:
URB_Status = USBH_LL_GetURBState(phost , phost->Control.pipe_out);
if (URB_Status == USBH_URB_DONE)
{ /* If the Setup Pkt is sent successful, then change the state */
phost->Control.state = CTRL_STATUS_IN;
#if (USBH_USE_OS == 1)
osMessagePut ( phost->os_event, USBH_CONTROL_EVENT, 0);
#endif
}
/* handle error cases */
else if (URB_Status == USBH_URB_STALL)
{
/* In stall case, return to previous machine state*/
phost->Control.state = CTRL_STALLED;
status = USBH_NOT_SUPPORTED;
#if (USBH_USE_OS == 1)
osMessagePut ( phost->os_event, USBH_CONTROL_EVENT, 0);
#endif
}
else if (URB_Status == USBH_URB_NOTREADY)
{
/* Nack received from device */
phost->Control.state = CTRL_DATA_OUT;
#if (USBH_USE_OS == 1)
osMessagePut ( phost->os_event, USBH_CONTROL_EVENT, 0);
#endif
}
else if (URB_Status == USBH_URB_ERROR)
{
/* device error */
phost->Control.state = CTRL_ERROR;
status = USBH_FAIL;
#if (USBH_USE_OS == 1)
osMessagePut ( phost->os_event, USBH_CONTROL_EVENT, 0);
#endif
}
break;
case CTRL_STATUS_IN:
/* Send 0 bytes out packet */
USBH_CtlReceiveData (phost,
0,
0,
phost->Control.pipe_in);
phost->Control.timer = phost->Timer;
phost->Control.state = CTRL_STATUS_IN_WAIT;
break;
case CTRL_STATUS_IN_WAIT:
URB_Status = USBH_LL_GetURBState(phost , phost->Control.pipe_in);
if ( URB_Status == USBH_URB_DONE)
{ /* Control transfers completed, Exit the State Machine */
phost->Control.state = CTRL_COMPLETE;
status = USBH_OK;
#if (USBH_USE_OS == 1)
osMessagePut ( phost->os_event, USBH_CONTROL_EVENT, 0);
#endif
}
else if (URB_Status == USBH_URB_ERROR)
{
phost->Control.state = CTRL_ERROR;
#if (USBH_USE_OS == 1)
osMessagePut ( phost->os_event, USBH_CONTROL_EVENT, 0);
#endif
}
else if(URB_Status == USBH_URB_STALL)
{
/* Control transfers completed, Exit the State Machine */
status = USBH_NOT_SUPPORTED;
#if (USBH_USE_OS == 1)
osMessagePut ( phost->os_event, USBH_CONTROL_EVENT, 0);
#endif
}
break;
case CTRL_STATUS_OUT:
USBH_CtlSendData (phost,
0,
0,
phost->Control.pipe_out,
1);
phost->Control.timer = phost->Timer;
phost->Control.state = CTRL_STATUS_OUT_WAIT;
break;
case CTRL_STATUS_OUT_WAIT:
URB_Status = USBH_LL_GetURBState(phost , phost->Control.pipe_out);
if (URB_Status == USBH_URB_DONE)
{
status = USBH_OK;
phost->Control.state = CTRL_COMPLETE;
#if (USBH_USE_OS == 1)
osMessagePut ( phost->os_event, USBH_CONTROL_EVENT, 0);
#endif
}
else if (URB_Status == USBH_URB_NOTREADY)
{
phost->Control.state = CTRL_STATUS_OUT;
#if (USBH_USE_OS == 1)
osMessagePut ( phost->os_event, USBH_CONTROL_EVENT, 0);
#endif
}
else if (URB_Status == USBH_URB_ERROR)
{
phost->Control.state = CTRL_ERROR;
#if (USBH_USE_OS == 1)
osMessagePut ( phost->os_event, USBH_CONTROL_EVENT, 0);
#endif
}
break;
case CTRL_ERROR:
/*
After a halt condition is encountered or an error is detected by the
host, a control endpoint is allowed to recover by accepting the next Setup
PID; i.e., recovery actions via some other pipe are not required for control
endpoints. For the Default Control Pipe, a device reset will ultimately be
required to clear the halt or error condition if the next Setup PID is not
accepted.
*/
if (++ phost->Control.errorcount <= USBH_MAX_ERROR_COUNT)
{
/* try to recover control */
USBH_LL_Stop(phost);
/* Do the transmission again, starting from SETUP Packet */
phost->Control.state = CTRL_SETUP;
phost->RequestState = CMD_SEND;
}
else
{
phost->Control.errorcount = 0;
USBH_ErrLog("Control error");
status = USBH_FAIL;
}
break;
default:
break;
}
return status;
}