firmware/export/ata_idle_notify.h

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
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   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2006 Jonathan Gordon
  11  *
  12  * All files in this archive are subject to the GNU General Public License.
  13  * See the file COPYING in the source tree root for full license agreement.
  14  *
  15  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  16  * KIND, either express or implied.
  17  *
  18  ****************************************************************************/
  19 #ifndef __ATACALLBACK_H__
  20 #define __ATACALLBACK_H__
  21
  22 #include <stdbool.h>
  23
  24 #if 0
  25                 NOTE: ata_idle_nofity usage notes..
  26
  27         1) the callbacks are called in the ata thread, not main/your thread.
  28         2) Asyncronous callbacks (like the buffer refill) should be avoided.
  29             If you must use an async callback, remember to check ata_is_active() before
  30             accessing the disk, and nonot call any functions between that check and the
  31             disk access which may cause a yield (lcd_update() does this!)
  32         3) Do not call cany yielding functions in the callback
  33         4) Do not call ata_sleep in the callbacks
  34         5) Dont Panic!
  35 #endif
  36
  37 #define USING_ATA_CALLBACK  !defined(SIMULATOR)             \
  38                             && !defined(HAVE_FLASH_DISK)
  39
  40 #define MAX_ATA_CALLBACKS 5
  41 typedef bool (*ata_idle_notify)(void);
  42
  43 extern bool register_ata_idle_func(ata_idle_notify function);
  44 #if USING_ATA_CALLBACK
  45 extern void ata_idle_notify_init(void);
  46 extern void unregister_ata_idle_func(ata_idle_notify function, bool run);
  47 extern bool call_ata_idle_notifys(bool force);
  48 #else
  49 #define unregister_ata_idle_func(f,r)
  50 #define call_ata_idle_notifys(f)
  51 #define ata_idle_notify_init(s)
  52 #endif
  53
  54 #endif /* __ATACALLBACK_H__ */