206 lines
4.5 KiB
C
206 lines
4.5 KiB
C
/*
|
|
* linux/kernel/chr_drv/sound/gus_card.c
|
|
*
|
|
* Detection routine for the Gravis Ultrasound.
|
|
*
|
|
* Copyright by Hannu Savolainen 1993
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions are
|
|
* met: 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer. 2.
|
|
* Redistributions in binary form must reproduce the above copyright notice,
|
|
* this list of conditions and the following disclaimer in the documentation
|
|
* and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND ANY
|
|
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
|
|
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
|
* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
|
|
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
|
|
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
|
|
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
*/
|
|
|
|
#include "sound_config.h"
|
|
|
|
#if defined(CONFIGURE_SOUNDCARD) && !defined(EXCLUDE_GUS)
|
|
|
|
#include "gus_hw.h"
|
|
|
|
void gusintr (int);
|
|
|
|
int gus_base, gus_irq, gus_dma;
|
|
|
|
static int
|
|
set_gus_irq (int interrupt_level)
|
|
{
|
|
int retcode = EINVAL;
|
|
|
|
#ifdef linux
|
|
struct sigaction sa;
|
|
|
|
sa.sa_handler = gusintr;
|
|
|
|
#ifdef SND_SA_INTERRUPT
|
|
sa.sa_flags = SA_INTERRUPT;
|
|
#else
|
|
sa.sa_flags = 0;
|
|
#endif
|
|
|
|
sa.sa_mask = 0;
|
|
sa.sa_restorer = NULL;
|
|
|
|
retcode = irqaction (interrupt_level, &sa);
|
|
|
|
if (retcode < 0)
|
|
{
|
|
printk ("GUS: IRQ%d already in use\n", interrupt_level);
|
|
}
|
|
|
|
#else
|
|
/* # error Unimplemented for this OS */
|
|
#endif
|
|
return retcode;
|
|
}
|
|
|
|
int
|
|
gus_set_midi_irq (int interrupt_level)
|
|
{
|
|
int retcode = EINVAL;
|
|
|
|
#ifdef linux
|
|
struct sigaction sa;
|
|
|
|
sa.sa_handler = gus_midi_interrupt;
|
|
|
|
#ifdef SND_SA_INTERRUPT
|
|
sa.sa_flags = SA_INTERRUPT;
|
|
#else
|
|
sa.sa_flags = 0;
|
|
#endif
|
|
|
|
sa.sa_mask = 0;
|
|
sa.sa_restorer = NULL;
|
|
|
|
retcode = irqaction (interrupt_level, &sa);
|
|
|
|
if (retcode < 0)
|
|
{
|
|
printk ("GUS: IRQ%d already in use\n", interrupt_level);
|
|
}
|
|
|
|
#else
|
|
/* # error Unimplemented for this OS */
|
|
#endif
|
|
return retcode;
|
|
}
|
|
|
|
long
|
|
attach_gus_card (long mem_start, struct address_info *hw_config)
|
|
{
|
|
int io_addr;
|
|
|
|
set_gus_irq (hw_config->irq);
|
|
|
|
if (gus_wave_detect (hw_config->io_base)) /* Try first the default */
|
|
{
|
|
mem_start = gus_wave_init (mem_start, hw_config->irq, hw_config->dma);
|
|
#ifndef EXCLUDE_MIDI
|
|
mem_start = gus_midi_init (mem_start);
|
|
#endif
|
|
return mem_start;
|
|
}
|
|
|
|
#ifndef EXCLUDE_GUS_IODETECT
|
|
|
|
/*
|
|
* Look at the possible base addresses (0x2X0, X=1, 2, 3, 4, 5, 6)
|
|
*/
|
|
|
|
for (io_addr = 0x210; io_addr <= 0x260; io_addr += 0x10)
|
|
if (io_addr != hw_config->io_base) /* Already tested */
|
|
if (gus_wave_detect (io_addr))
|
|
{
|
|
printk (" WARNING! GUS found at %03x, config was %03x ", io_addr, hw_config->io_base);
|
|
mem_start = gus_wave_init (mem_start, hw_config->irq, hw_config->dma);
|
|
#ifndef EXCLUDE_MIDI
|
|
mem_start = gus_midi_init (mem_start);
|
|
#endif
|
|
return mem_start;
|
|
}
|
|
|
|
#endif
|
|
|
|
return mem_start; /* Not detected */
|
|
}
|
|
|
|
int
|
|
probe_gus (struct address_info *hw_config)
|
|
{
|
|
int io_addr;
|
|
|
|
if (gus_wave_detect (hw_config->io_base))
|
|
return 1;
|
|
|
|
#ifndef EXCLUDE_GUS_IODETECT
|
|
|
|
/*
|
|
* Look at the possible base addresses (0x2X0, X=1, 2, 3, 4, 5, 6)
|
|
*/
|
|
|
|
for (io_addr = 0x210; io_addr <= 0x260; io_addr += 0x10)
|
|
if (io_addr != hw_config->io_base) /* Already tested */
|
|
if (gus_wave_detect (io_addr))
|
|
return 1;
|
|
|
|
#endif
|
|
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
gusintr (int unit)
|
|
{
|
|
unsigned char src;
|
|
unsigned long flags;
|
|
|
|
while (1)
|
|
{
|
|
if (!(src = INB (u_IrqStatus)))
|
|
return;
|
|
|
|
if (src & DMA_TC_IRQ)
|
|
{
|
|
guswave_dma_irq ();
|
|
}
|
|
|
|
if (src & (MIDI_TX_IRQ | MIDI_RX_IRQ))
|
|
{
|
|
#ifndef EXCLUDE_MIDI
|
|
gus_midi_interrupt (0);
|
|
#endif
|
|
}
|
|
|
|
if (src & (GF1_TIMER1_IRQ | GF1_TIMER2_IRQ))
|
|
{
|
|
printk ("T");
|
|
gus_write8 (0x45, 0); /* Timer control */
|
|
}
|
|
|
|
if (src & (WAVETABLE_IRQ | ENVELOPE_IRQ))
|
|
{
|
|
DISABLE_INTR (flags);
|
|
gus_voice_irq ();
|
|
RESTORE_INTR (flags);
|
|
}
|
|
}
|
|
}
|
|
|
|
#endif
|