rom/devs/ata/timer.c

   1 /*
   2     Copyright © 2009-2013, The AROS Development Team. All rights reserved
   3     $Id$
   4
   5     Desc:
   6     Lang: English
   7 */
   8
   9 #include <exec/types.h>
  10 #include <devices/timer.h>
  11 #include <exec/io.h>
  12 #include <proto/exec.h>
  13 #include <aros/debug.h>
  14 #include <proto/timer.h>
  15
  16 #include "timer.h"
  17 #include "ata.h"
  18
  19 struct IORequest *ata_OpenTimer(struct ataBase *base)
  20 {
  21     struct MsgPort *p = CreateMsgPort();
  22     if (NULL != p)
  23     {
  24         struct IORequest *io = CreateIORequest(p, sizeof(struct timerequest));
  25
  26         if (NULL != io)
  27         {
  28             /*
  29              * ok. ECLOCK does not have too great resolution, either.
  30              * we will have to sacrifice our performance a little bit, meaning, the 400ns will turn into (worst case) 2us.
  31              * hopefully we won't have to call that TOO often...
  32              */
  33             if (0 == OpenDevice("timer.device", UNIT_MICROHZ, io, 0))
  34             {
  35                 return io;
  36             }
  37             else
  38             {
  39                 bug("[ATA  ] Failed to open timer.device, unit MICROHZ\n");
  40             }
  41             DeleteIORequest(io);
  42         }
  43         else
  44         {
  45             bug("[ATA  ] Failed to create timerequest\n");
  46         }
  47         DeleteMsgPort(p);
  48     }
  49     else
  50     {
  51         bug("[ATA  ] Failed to create timer port\n");
  52     }
  53
  54     return NULL;
  55 }
  56
  57 void ata_CloseTimer(struct IORequest *tmr)
  58 {
  59     if (NULL != tmr)
  60     {
  61         struct MsgPort *p = tmr->io_Message.mn_ReplyPort;
  62         CloseDevice(tmr);
  63         DeleteIORequest(tmr);
  64         DeleteMsgPort(p);
  65     }
  66 }