arch/i386-pc/include/asm/speaker.h

   1 /*
   2     Copyright © 1995-2001, The AROS Development Team. All rights reserved.
   3     $Id$
   4 */
   5
   6 #ifndef _SPEAKER_H
   7 #define _SPEAKER_H
   8
   9 #define inb(port) \
  10     ({  char __value;   \
  11         __asm__ __volatile__ ("inb $" #port ",%%al":"=a"(__value));     \
  12         __value;        })
  13
  14 #define outb(val,port) \
  15     ({  char __value=(val);     \
  16         __asm__ __volatile__ ("outb %%al,$" #port::"a"(__value)); })
  17
  18
  19 #define SetSpkFreq(freq)                                  \
  20     do                                                    \
  21     {                                                     \
  22         WORD counter = 0x1234DD / freq;                   \
  23         outb (0xB6, 0x43);                                \
  24         outb ((UBYTE) (counter & 0x00FF), 0x42);          \
  25         outb ((UBYTE) ((counter & 0xFF00) >> 8), 0x42);   \
  26     }                                                     \
  27     while (0)
  28
  29 #define SpkOn() outb (inb(0x61) | 3, 0x61)
  30
  31 #define SpkOff() outb (inb(0x61) & ~3, 0x61)
  32
  33 #define Sound(freq,loop)                                \
  34         SetSpkFreq(freq);                               \
  35         SpkOn();                                        \
  36         {                                               \
  37                 int i, dummy;                           \
  38                 for (i = 0; i < loop; dummy = i*i, i++);\
  39         }                                               \
  40         SpkOff();
  41
  42 #endif /* _SPEAKER_H */