workbench/devs/AHI/Drivers/EMU10kx/emu10kx-camd.c

   1 /*
   2      emu10kx.audio - AHI driver for SoundBlaster Live! series
   3      Copyright (C) 2002-2005 Martin Blom <martin@blom.org>
   4
   5      This program is free software; you can redistribute it and/or
   6      modify it under the terms of the GNU General Public License
   7      as published by the Free Software Foundation; either version 2
   8      of the License, or (at your option) any later version.
   9
  10      This program is distributed in the hope that it will be useful,
  11      but WITHOUT ANY WARRANTY; without even the implied warranty of
  12      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13      GNU General Public License for more details.
  14
  15      You should have received a copy of the GNU General Public License
  16      along with this program; if not, write to the Free Software
  17      Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  18 */
  19
  20 #include <config.h>
  21
  22 #include <clib/alib_protos.h>
  23 #include <proto/utility.h>
  24
  25 #include "library.h"
  26 #include "8010.h"
  27 #include "hwaccess.h"
  28
  29 /******************************************************************************
  30 ** Open CAMD Port  ************************************************************
  31 ******************************************************************************/
  32
  33 ULONG
  34 OpenCAMDPort( struct Hook*        hook,
  35               struct EMU10kxBase* EMU10kxBase,
  36               struct OpenMessage* msg )
  37 {
  38   struct DriverBase*  AHIsubBase = (struct DriverBase*) EMU10kxBase;
  39   struct EMU10kxData* dd;
  40
  41   BOOL in_use;
  42
  43 //  KPrintF( "OpenCAMDPort(%ld,%ld)\n", msg->PortNum, msg->V40Mode );
  44
  45   if( msg->PortNum >= EMU10kxBase->cards_found ||
  46       EMU10kxBase->driverdatas[ msg->PortNum ] == NULL )
  47   {
  48     Req( "No valid EMU10kxData for CAMD port %ld.", msg->PortNum );
  49     return FALSE;
  50   }
  51
  52   dd = EMU10kxBase->driverdatas[ msg->PortNum ];
  53
  54   ObtainSemaphore( &EMU10kxBase->semaphore );
  55   in_use = ( dd->camd_transmitfunc != NULL ||
  56              dd->camd_receivefunc != NULL );
  57   if( !in_use )
  58   {
  59     dd->camd_v40          = msg->V40Mode;
  60     dd->camd_transmitfunc = msg->TransmitFunc;
  61     dd->camd_receivefunc  = msg->ReceiveFunc;
  62   }
  63   ReleaseSemaphore( &EMU10kxBase->semaphore );
  64
  65   if( in_use )
  66   {
  67     return FALSE;
  68   }
  69
  70   emu10k1_irq_disable( &dd->card, INTE_MIDIRXENABLE );
  71   emu10k1_irq_disable( &dd->card, INTE_MIDITXENABLE );
  72   emu10k1_mpu_reset( &dd->card );
  73   emu10k1_irq_enable( &dd->card, INTE_MIDIRXENABLE );
  74
  75   return TRUE;
  76 }
  77
  78
  79 /******************************************************************************
  80 ** Close CAMD Port  ***********************************************************
  81 ******************************************************************************/
  82
  83 VOID
  84 CloseCAMDPort( struct Hook*         hook,
  85                struct EMU10kxBase*  EMU10kxBase,
  86                struct CloseMessage* msg )
  87 {
  88   struct EMU10kxData* dd         = EMU10kxBase->driverdatas[ msg->PortNum ];
  89
  90   emu10k1_irq_disable( &dd->card, INTE_MIDIRXENABLE );
  91   emu10k1_irq_disable( &dd->card, INTE_MIDITXENABLE );
  92   emu10k1_mpu_reset( &dd->card );
  93
  94   ObtainSemaphore( &EMU10kxBase->semaphore );
  95   dd->camd_transmitfunc = NULL;
  96   dd->camd_receivefunc  = NULL;
  97   ReleaseSemaphore( &EMU10kxBase->semaphore );
  98 }
  99
 100
 101 /******************************************************************************
 102 ** Start CAMD transmission  ***************************************************
 103 ******************************************************************************/
 104
 105 VOID
 106 ActivateCAMDXmit( struct Hook*            hook,
 107                   struct EMU10kxBase*     EMU10kxBase,
 108                   struct ActivateMessage* msg )
 109 {
 110   struct EMU10kxData* dd         = EMU10kxBase->driverdatas[ msg->PortNum ];
 111
 112 //  KPrintF( "ActivateCAMDXmit(%08lx)\n", msg->PortNum );
 113
 114   emu10k1_irq_enable( &dd->card, INTE_MIDITXENABLE );
 115
 116   // The interrupt handler will now fetch the bytes and transmit them.
 117 }