/*
* Mac bong noise generator. Note - we ought to put a boingy noise
* here 8)
- *
+ *
* ----------------------------------------------------------------------
* 16.11.98:
* rewrote some functions, added support for Enhanced ASC (Quadras)
static __u8 mac_asc_wave_tab[ 0x800 ];
/*
- * Alan's original sine table; needs interpolating to 0x800
- * (hint: interpolate or hardwire [0 -> Pi/2[, it's symmetric)
+ * Alan's original sine table; needs interpolating to 0x800
+ * (hint: interpolate or hardwire [0 -> Pi/2[, it's symmetric)
*/
static const signed char sine_data[] = {
0, 39, 75, 103, 121, 127, 121, 103, 75, 39,
*/
static volatile __u8* mac_asc_regs = ( void* )0x50F14000;
-/*
- * sample rate; is this a good default value?
+/*
+ * sample rate; is this a good default value?
*/
-static unsigned long mac_asc_samplespersec = 11050;
+static unsigned long mac_asc_samplespersec = 11050;
static int mac_bell_duration;
static unsigned long mac_bell_phase; /* 0..2*Pi -> 0..0x800 (wavetable size) */
static unsigned long mac_bell_phasepersample;
/*
- * some function protos
+ * some function protos
*/
static void mac_init_asc( void );
static void mac_nosound( unsigned long );
{
int i;
- /*
- * do some machine specific initialization
+ /*
+ * do some machine specific initialization
* BTW:
* the NetBSD Quadra patch identifies the Enhanced Apple Sound Chip via
- * mac_asc_regs[ 0x800 ] & 0xF0 != 0
+ * mac_asc_regs[ 0x800 ] & 0xF0 != 0
* this makes no sense here, because we have to set the default sample
* rate anyway if we want correct frequencies
*/
*/
mac_asc_regs = ( void* )0x50010000;
break;
- /*
- * not sure about how correct this list is
- * machines with the EASC enhanced apple sound chip
+ /*
+ * not sure about how correct this list is
+ * machines with the EASC enhanced apple sound chip
*/
case MAC_MODEL_Q630:
case MAC_MODEL_P475:
mac_special_bell = mac_quadra_start_bell;
mac_asc_samplespersec = 22150;
- break;
+ break;
case MAC_MODEL_C660:
case MAC_MODEL_Q840:
/*
* The Quadra 660AV and 840AV use the "Singer" custom ASIC for sound I/O.
- * It appears to be similar to the "AWACS" custom ASIC in the Power Mac
- * [678]100. Because Singer and AWACS may have a similar hardware
- * interface, this would imply that the code in drivers/sound/dmasound.c
+ * It appears to be similar to the "AWACS" custom ASIC in the Power Mac
+ * [678]100. Because Singer and AWACS may have a similar hardware
+ * interface, this would imply that the code in drivers/sound/dmasound.c
* for AWACS could be used as a basis for Singer support. All we have to
- * do is figure out how to do DMA on the 660AV/840AV through the PSC and
+ * do is figure out how to do DMA on the 660AV/840AV through the PSC and
* figure out where the Singer hardware sits in memory. (I'd look in the
- * vicinity of the AWACS location in a Power Mac [678]100 first, or the
- * current location of the Apple Sound Chip--ASC--in other Macs.) The
+ * vicinity of the AWACS location in a Power Mac [678]100 first, or the
+ * current location of the Apple Sound Chip--ASC--in other Macs.) The
* Power Mac [678]100 info can be found in MkLinux Mach kernel sources.
*
* Quoted from Apple's Tech Info Library, article number 16405:
* Macintosh models have 16-bit audio input and output capability
* because of the AT&T DSP3210 hardware circuitry and the 16-bit Singer
* codec circuitry in the AVs. The Audio Waveform Amplifier and
- * Converter (AWAC) chip in the Power Macintosh performs the same
+ * Converter (AWAC) chip in the Power Macintosh performs the same
* 16-bit I/O functionality. The PowerBook 500 series computers
* support 16-bit stereo output, but only mono input."
*
break;
}
- /*
- * init the wave table with a simple triangular wave
+ /*
+ * init the wave table with a simple triangular wave
* A sine wave would sure be nicer here ...
*/
for ( i = 0; i < 0x400; i++ )
mac_asc_wave_tab[ i + 0x400 ] = 0xFF - i / 4;
}
mac_asc_inited = 1;
-}
+}
/*
- * Called to make noise; current single entry to the boing driver.
+ * Called to make noise; current single entry to the boing driver.
* Does the job for simple ASC, calls other routines else.
* XXX Fixme:
- * Should be split into asc_mksound, easc_mksound, av_mksound and
- * function pointer set in mac_init_asc which would be called at
- * init time.
+ * Should be split into asc_mksound, easc_mksound, av_mksound and
+ * function pointer set in mac_init_asc which would be called at
+ * init time.
* _This_ is rather ugly ...
*/
void mac_mksound( unsigned int freq, unsigned int length )
del_timer( &mac_sound_timer );
for ( i = 0; i < 0x800; i++ )
- mac_asc_regs[ i ] = 0;
+ mac_asc_regs[ i ] = 0;
for ( i = 0; i < 0x800; i++ )
mac_asc_regs[ i ] = mac_asc_wave_tab[ i ];
static void mac_nosound( unsigned long ignored )
{
mac_asc_regs[ ASC_ENABLE ] = 0;
-}
+}
/*
* EASC entry; init EASC, don't load wavetable, schedule 'start whining'.
mac_bell_duration = length;
mac_bell_phase = 0;
mac_bell_phasepersample = ( freq * sizeof( mac_asc_wave_tab ) ) / mac_asc_samplespersec;
- /* this is reasonably big for small frequencies */
+ /* this is reasonably big for small frequencies */
local_irq_save(flags);
/* set up the ASC registers */
if ( mac_asc_regs[ 0x801 ] != 1 )
{
- /* select mono mode */
+ /* select mono mode */
mac_asc_regs[ 0x807 ] = 0;
/* select sampled sound mode */
mac_asc_regs[ 0x802 ] = 0;
- /* ??? */
+ /* ??? */
mac_asc_regs[ 0x801 ] = 1;
mac_asc_regs[ 0x803 ] |= 0x80;
mac_asc_regs[ 0x803 ] &= 0x7F;
/*
* EASC 'start/continue whining'; I'm not sure why the above function didn't
- * already load the wave table, or at least call this one...
+ * already load the wave table, or at least call this one...
* This piece keeps reloading the wave table until done.
*/
static void mac_quadra_ring_bell( unsigned long ignored )
{
- int i, count = mac_asc_samplespersec / HZ;
+ int i, count = mac_asc_samplespersec / HZ;
__u32 flags;
/*
*/
local_irq_save(flags);
-
+
del_timer( &mac_sound_timer );
if ( mac_bell_duration-- > 0 )
}
else
mac_asc_regs[ 0x801 ] = 0;
-
+
local_irq_restore(flags);
}
*/
static void mac_av_start_bell( unsigned int freq, unsigned int length, unsigned int volume )
{
-}
+}
git://git.onelab.eu / linux-2.6.git / blobdiff