sound/oss/emu10k1/timer.h

   1 /*
   2  **********************************************************************
   3  *     timer.h
   4  *     Copyright (C) 1999, 2000 Creative Labs, Inc.
   5  *
   6  **********************************************************************
   7  *
   8  *     This program is free software; you can redistribute it and/or
   9  *     modify it under the terms of the GNU General Public License as
  10  *     published by the Free Software Foundation; either version 2 of
  11  *     the License, or (at your option) any later version.
  12  *
  13  *     This program is distributed in the hope that it will be useful,
  14  *     but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  *     GNU General Public License for more details.
  17  *
  18  *     You should have received a copy of the GNU General Public
  19  *     License along with this program; if not, write to the Free
  20  *     Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139,
  21  *     USA.
  22  *
  23  **********************************************************************
  24  */
  25
  26
  27 #ifndef _TIMER_H
  28 #define _TIMER_H
  29
  30 #include <linux/sched.h>
  31 #include <linux/interrupt.h>
  32 #include "hwaccess.h"
  33
  34 struct emu_timer
  35 {
  36         struct list_head list;
  37         struct tasklet_struct tasklet;
  38         u8 state;
  39         u16 count;                              /* current number of interrupts */
  40         u16 count_max;                          /* number of interrupts needed to schedule the bh */
  41         u16 delay;                              /* timer delay */
  42 };
  43
  44 void emu10k1_timer_install(struct emu10k1_card *, struct emu_timer *, u16);
  45 void emu10k1_timer_uninstall(struct emu10k1_card *, struct emu_timer *);
  46 void emu10k1_timer_enable(struct emu10k1_card *, struct emu_timer *);
  47 void emu10k1_timer_disable(struct emu10k1_card *, struct emu_timer *);
  48
  49 #define TIMER_STOPPED                   0xffff
  50 #define TIMER_STATE_INSTALLED           0x01
  51 #define TIMER_STATE_ACTIVE              0x02
  52 #define TIMER_STATE_UNINSTALLED         0x04
  53
  54 #endif /* _TIMER_H */