/*********************************************************************
 *
 *                Microchip USB C18 Firmware Version 1.0
 *
 *********************************************************************
 * FileName:        usb9.c
 * Dependencies:    See INCLUDES section below
 * Processor:       PIC18
 * Compiler:        C18 2.30.01+
 * Company:         Microchip Technology, Inc.
 *
 * Author               Date        Comment
 *~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 * Rawin Rojvanit       11/19/04    Original.
 * Dario Greggio        28/02/05    Aggiunto ClrWdt() qua e lÿà.
 ********************************************************************/


#if defined(__18F4550) || defined(__18F2550) || defined(__18F2455)

/** I N C L U D E S **********************************************************/
#include <p18cxxx.h>
#include <typedefs.h>
#include "system\usb\usb.h"
#include "io_cfg.h"                     // Required for self_power status

/** V A R I A B L E S ********************************************************/
#pragma udata

/** P R I V A T E  P R O T O T Y P E S ***************************************/
void USBStdGetDscHandler(void);
void USBStdSetCfgHandler(void);
void USBStdGetStatusHandler(void);
void USBStdFeatureReqHandler(void);

/** D E C L A R A T I O N S **************************************************/
#pragma code

/******************************************************************************
 * Function:        void USBCheckStdRequest(void)
 *
 * PreCondition:    None
 *
 * Input:           None
 *
 * Output:          None
 *
 * Side Effects:    None
 *
 * Overview:        This routine checks the setup data packet to see if it
 *                  knows how to handle it
 *
 * Note:            None
 *****************************************************************************/
void USBCheckStdRequest(void) {   

  if(SetupPkt.RequestType != STANDARD) 
		return;
    
  switch(SetupPkt.bRequest) {
    case SET_ADR:
      ctrl_trf_session_owner = MUID_USB9;
      usb_device_state = ADR_PENDING_STATE;       // Update state only
      /* See USBCtrlTrfInHandler() in usbctrltrf.c for the next step */
      break;
    case GET_DSC:
      USBStdGetDscHandler();
      break;
    case SET_CFG:
      USBStdSetCfgHandler();
      break;
    case GET_CFG:
      ctrl_trf_session_owner = MUID_USB9;
      pSrc.bRam = (byte*)&usb_active_cfg;         // Set Source
      usb_stat.ctrl_trf_mem = _RAM;               // Set memory type
      LSB(wCount) = 1;                            // Set data count
      break;
    case GET_STATUS:
      USBStdGetStatusHandler();
      break;
    case CLR_FEATURE:
    case SET_FEATURE:
      USBStdFeatureReqHandler();
      break;
    case GET_INTF:
      ctrl_trf_session_owner = MUID_USB9;
      pSrc.bRam = (byte*)&usb_alt_intf+SetupPkt.bIntfID;  // Set source
      usb_stat.ctrl_trf_mem = _RAM;               // Set memory type
      LSB(wCount) = 1;                            // Set data count
      break;
    case SET_INTF:
      ctrl_trf_session_owner = MUID_USB9;
      usb_alt_intf[SetupPkt.bIntfID] = SetupPkt.bAltID;
      break;
    case SET_DSC:
    case SYNCH_FRAME:
    default:
      break;
    } //end switch

	} //end USBCheckStdRequest

/******************************************************************************
 * Function:        void USBStdGetDscHandler(void)
 *
 * PreCondition:    None
 *
 * Input:           None
 *
 * Output:          None
 *
 * Side Effects:    None
 *
 * Overview:        This routine handles the standard GET_DESCRIPTOR request.
 *                  It utilizes tables dynamically looks up descriptor size.
 *                  This routine should never have to be modified if the tables
 *                  in usbdsc.c are declared correctly.
 *
 * Note:            None
 *****************************************************************************/
void USBStdGetDscHandler(void) {

  if(SetupPkt.bmRequestType == 0x80) {
    switch(SetupPkt.bDscType) {
      case DSC_DEV:
        ctrl_trf_session_owner = MUID_USB9;
        pSrc.bRom = (rom byte*)&device_dsc;
        wCount._word = sizeof(device_dsc);          // Set data count
        break;
      case DSC_CFG:
        ctrl_trf_session_owner = MUID_USB9;
        pSrc.bRom = *(USB_CD_Ptr+SetupPkt.bDscIndex);
        wCount._word = *(pSrc.wRom+1);              // Set data count
        break;
      case DSC_STR:
        ctrl_trf_session_owner = MUID_USB9;
        pSrc.bRom = *(USB_SD_Ptr+SetupPkt.bDscIndex);
        wCount._word = *pSrc.bRom;                  // Set data count
        break;
      } //end switch
        
    usb_stat.ctrl_trf_mem = _ROM;                       // Set memory type
    } //end if
	} //end USBStdGetDscHandler

/******************************************************************************
 * Function:        void USBStdSetCfgHandler(void)
 *
 * PreCondition:    None
 *
 * Input:           None
 *
 * Output:          None
 *
 * Side Effects:    None
 *
 * Overview:        This routine first disables all endpoints by clearing
 *                  UEP registers. It then configures (initializes) endpoints
 *                  specified in the modifiable section.
 *
 * Note:            None
 *****************************************************************************/
void USBStdSetCfgHandler(void) {

  ctrl_trf_session_owner = MUID_USB9;
  mDisableEP1to15();                          // See usbdrv.h
  ClearArray((byte*)&usb_alt_intf,MAX_NUM_INT);
  usb_active_cfg = SetupPkt.bCfgValue;
  if(SetupPkt.bCfgValue == 0)
    usb_device_state = ADDRESS_STATE;
  else {
    usb_device_state = CONFIGURED_STATE;

    /* Modifiable Section */

  #if defined(USB_USE_CDC)                // See autofiles\usbcfg.h
    CDCInitEP();
  #endif
  #if defined(USB_USE_HID)                // See autofiles\usbcfg.h
    HIDInitEP();
  #endif

    /* End modifiable section */

	  } //end if(SetupPkt.bcfgValue == 0)
	} //end USBStdSetCfgHandler

/******************************************************************************
 * Function:        void USBStdGetStatusHandler(void)
 *
 * PreCondition:    None
 *
 * Input:           None
 *
 * Output:          None
 *
 * Side Effects:    None
 *
 * Overview:        This routine handles the standard GET_STATUS request
 *
 * Note:            None
 *****************************************************************************/
void USBStdGetStatusHandler(void) {
 
	CtrlTrfData._byte0 = 0;                         // Initialize content
  CtrlTrfData._byte1 = 0;
        
  switch(SetupPkt.Recipient) {
    case RCPT_DEV:
      ctrl_trf_session_owner = MUID_USB9;
      /*
       * _byte0: bit0: Self-Powered Status [0] Bus-Powered [1] Self-Powered
       *         bit1: RemoteWakeup        [0] Disabled    [1] Enabled
       */
      if(self_power == 1)                     // self_power defined in io_cfg.h
        CtrlTrfData._byte0 |= 0b000000001;    // Set bit0
            
      if(usb_stat.RemoteWakeup == 1)          // usb_stat defined in usbmmap.c
        CtrlTrfData._byte0 |= 0b00000010;     // Set bit1
      break;
    case RCPT_INTF:
      ctrl_trf_session_owner = MUID_USB9;     // No data to update
      break;
    case RCPT_EP:
      ctrl_trf_session_owner = MUID_USB9;
      /*
       * _byte0: bit0: Halt Status [0] Not Halted [1] Halted
       */
      pDst.bRam = (byte*)&ep0Bo+(SetupPkt.EPNum*8)+(SetupPkt.EPDir*4);
      if(*pDst.bRam & _BSTALL)    // Use _BSTALL as a bit mask
        CtrlTrfData._byte0=0x01;// Set bit0
      break;
    } //end switch
    
  if(ctrl_trf_session_owner == MUID_USB9) {
    pSrc.bRam = (byte*)&CtrlTrfData;            // Set Source
    usb_stat.ctrl_trf_mem = _RAM;               // Set memory type
    LSB(wCount) = 2;                            // Set data count
    } //end if(...)
	} //end USBStdGetStatusHandler

/******************************************************************************
 * Function:        void USBStdFeatureReqHandler(void)
 *
 * PreCondition:    None
 *
 * Input:           None
 *
 * Output:          None
 *
 * Side Effects:    None
 *
 * Overview:        This routine handles the standard SET & CLEAR FEATURES
 *                  requests
 *
 * Note:            None
 *****************************************************************************/
void USBStdFeatureReqHandler(void) {

  if((SetupPkt.bFeature == DEVICE_REMOTE_WAKEUP) &&
    (SetupPkt.Recipient == RCPT_DEV)) {
    ctrl_trf_session_owner = MUID_USB9;
    if(SetupPkt.bRequest == SET_FEATURE)
      usb_stat.RemoteWakeup = 1;
    else
      usb_stat.RemoteWakeup = 0;
    } //end if
    
  if((SetupPkt.bFeature == ENDPOINT_HALT) &&
    (SetupPkt.Recipient == RCPT_EP) &&
    (SetupPkt.EPNum != 0)) {
    ctrl_trf_session_owner = MUID_USB9;

        /* Must do address calculation here */
    pDst.bRam = (byte*)&ep0Bo+(SetupPkt.EPNum*8)+(SetupPkt.EPDir*4);
        
    if(SetupPkt.bRequest == SET_FEATURE)
      *pDst.bRam = _USIE|_BSTALL;
    else {
      if(SetupPkt.EPDir == 1) // IN
	      *pDst.bRam = _UCPU;
      else
        *pDst.bRam = _USIE|_DAT0|_DTSEN;
      } //end if
    } //end if
	} //end USBStdFeatureReqHandler

#endif

/** EOF usb9.c ***************************************************************/

static char dummy;