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/*
* sound/gus_card.c
*
* Detection routine for the Gravis Ultrasound.
*/
/*
* Copyright (C) by Hannu Savolainen 1993-1997
*
* OSS/Free for Linux is distributed under the GNU GENERAL PUBLIC LICENSE (GPL)
* Version 2 (June 1991). See the "COPYING" file distributed with this software
* for more info.
*/
#include <linux/config.h>
#include "sound_config.h"
#if defined(CONFIG_GUSHW)
#include "gus_hw.h"
void gusintr (int irq, void *dev_id, struct pt_regs *dummy);
int gus_base, gus_irq, gus_dma;
extern int gus_wave_volume;
extern int gus_pcm_volume;
extern int have_gus_max;
int gus_pnp_flag = 0;
void
attach_gus_card (struct address_info *hw_config)
{
snd_set_irq_handler (hw_config->irq, gusintr, "Gravis Ultrasound", hw_config->osp);
gus_wave_init (hw_config);
request_region (hw_config->io_base, 16, "GUS");
request_region (hw_config->io_base + 0x100, 12, "GUS"); /* 0x10c-> is MAX */
if (sound_alloc_dma (hw_config->dma, "GUS"))
printk ("gus_card.c: Can't allocate DMA channel\n");
if (hw_config->dma2 != -1 && hw_config->dma2 != hw_config->dma)
if (sound_alloc_dma (hw_config->dma2, "GUS(2)"))
printk ("gus_card.c: Can't allocate DMA channel2\n");
#ifdef CONFIG_MIDI
gus_midi_init ();
#endif
}
int
probe_gus (struct address_info *hw_config)
{
int irq;
int io_addr;
if (hw_config->card_subtype == 1)
gus_pnp_flag = 1;
irq = hw_config->irq;
if (hw_config->card_subtype == 0) /* GUS/MAX/ACE */
if (irq != 3 && irq != 5 && irq != 7 && irq != 9 &&
irq != 11 && irq != 12 && irq != 15)
{
printk ("GUS: Unsupported IRQ %d\n", irq);
return 0;
}
if (check_region (hw_config->io_base, 16))
printk ("GUS: I/O range conflict (1)\n");
else if (check_region (hw_config->io_base + 0x100, 16))
printk ("GUS: I/O range conflict (2)\n");
else 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 (!check_region (io_addr, 16))
if (!check_region (io_addr + 0x100, 16))
if (gus_wave_detect (io_addr))
{
hw_config->io_base = io_addr;
return 1;
}
#endif
return 0;
}
void
unload_gus (struct address_info *hw_config)
{
DDB (printk ("unload_gus(%x)\n", hw_config->io_base));
gus_wave_unload ();
release_region (hw_config->io_base, 16);
release_region (hw_config->io_base + 0x100, 12); /* 0x10c-> is MAX */
snd_release_irq (hw_config->irq);
sound_free_dma (hw_config->dma);
if (hw_config->dma2 != -1 && hw_config->dma2 != hw_config->dma)
sound_free_dma (hw_config->dma2);
}
void
gusintr (int irq, void *dev_id, struct pt_regs *dummy)
{
unsigned char src;
extern int gus_timer_enabled;
sti ();
#ifdef CONFIG_GUSMAX
if (have_gus_max)
ad1848_interrupt (irq, NULL, NULL);
#endif
while (1)
{
if (!(src = inb (u_IrqStatus)))
return;
if (src & DMA_TC_IRQ)
{
guswave_dma_irq ();
}
if (src & (MIDI_TX_IRQ | MIDI_RX_IRQ))
{
#ifdef CONFIG_MIDI
gus_midi_interrupt (0);
#endif
}
if (src & (GF1_TIMER1_IRQ | GF1_TIMER2_IRQ))
{
#ifdef CONFIG_SEQUENCER
if (gus_timer_enabled)
{
sound_timer_interrupt ();
}
gus_write8 (0x45, 0); /* Ack IRQ */
gus_timer_command (4, 0x80); /* Reset IRQ flags */
#else
gus_write8 (0x45, 0); /* Stop timers */
#endif
}
if (src & (WAVETABLE_IRQ | ENVELOPE_IRQ))
{
gus_voice_irq ();
}
}
}
#endif
/*
* Some extra code for the 16 bit sampling option
*/
#if defined(CONFIG_GUS16)
int
probe_gus_db16 (struct address_info *hw_config)
{
return ad1848_detect (hw_config->io_base, NULL, hw_config->osp);
}
void
attach_gus_db16 (struct address_info *hw_config)
{
#ifdef CONFIG_GUSHW
gus_pcm_volume = 100;
gus_wave_volume = 90;
#endif
ad1848_init ("GUS 16 bit sampling", hw_config->io_base,
hw_config->irq,
hw_config->dma,
hw_config->dma, 0,
hw_config->osp);
}
void
unload_gus_db16 (struct address_info *hw_config)
{
ad1848_unload (hw_config->io_base,
hw_config->irq,
hw_config->dma,
hw_config->dma, 0);
}
#endif
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