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linux-sg2042/sound/oss/gus_card.c

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/*
* sound/gus_card.c
*
* Detection routine for the Gravis Ultrasound.
*
* Copyright (C) by Hannu Savolainen 1993-1997
*
*
* Frank van de Pol : Fixed GUS MAX interrupt handling, enabled simultanious
* usage of CS4231A codec, GUS wave and MIDI for GUS MAX.
* Christoph Hellwig: Adapted to module_init/module_exit, simple cleanups.
*
* Status:
* Tested...
*/
#include <linux/config.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/module.h>
#include "sound_config.h"
#include "gus.h"
#include "gus_hw.h"
irqreturn_t gusintr(int irq, void *dev_id, struct pt_regs *dummy);
int gus_base = 0, gus_irq = 0, gus_dma = 0;
int gus_no_wave_dma = 0;
extern int gus_wave_volume;
extern int gus_pcm_volume;
extern int have_gus_max;
int gus_pnp_flag = 0;
#ifdef CONFIG_SOUND_GUS16
static int db16; /* Has a Gus16 AD1848 on it */
#endif
static void __init attach_gus(struct address_info *hw_config)
{
gus_wave_init(hw_config);
if (sound_alloc_dma(hw_config->dma, "GUS"))
printk(KERN_ERR "gus_card.c: Can't allocate DMA channel %d\n", hw_config->dma);
if (hw_config->dma2 != -1 && hw_config->dma2 != hw_config->dma)
if (sound_alloc_dma(hw_config->dma2, "GUS(2)"))
printk(KERN_ERR "gus_card.c: Can't allocate DMA channel %d\n", hw_config->dma2);
gus_midi_init(hw_config);
if(request_irq(hw_config->irq, gusintr, 0, "Gravis Ultrasound", hw_config)<0)
printk(KERN_ERR "gus_card.c: Unable to allocate IRQ %d\n", hw_config->irq);
return;
}
static int __init 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(KERN_ERR "GUS: Unsupported IRQ %d\n", irq);
return 0;
}
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 */
continue;
if (gus_wave_detect(io_addr)) {
hw_config->io_base = io_addr;
return 1;
}
}
#endif
printk("NO GUS card found !\n");
return 0;
}
static void __exit unload_gus(struct address_info *hw_config)
{
DDB(printk("unload_gus(%x)\n", hw_config->io_base));
gus_wave_unload(hw_config);
release_region(hw_config->io_base, 16);
release_region(hw_config->io_base + 0x100, 12); /* 0x10c-> is MAX */
free_irq(hw_config->irq, hw_config);
sound_free_dma(hw_config->dma);
if (hw_config->dma2 != -1 && hw_config->dma2 != hw_config->dma)
sound_free_dma(hw_config->dma2);
}
irqreturn_t gusintr(int irq, void *dev_id, struct pt_regs *dummy)
{
unsigned char src;
extern int gus_timer_enabled;
int handled = 0;
#ifdef CONFIG_SOUND_GUSMAX
if (have_gus_max) {
struct address_info *hw_config = dev_id;
adintr(irq, (void *)hw_config->slots[1], NULL);
}
#endif
#ifdef CONFIG_SOUND_GUS16
if (db16) {
struct address_info *hw_config = dev_id;
adintr(irq, (void *)hw_config->slots[3], NULL);
}
#endif
while (1)
{
if (!(src = inb(u_IrqStatus)))
break;
handled = 1;
if (src & DMA_TC_IRQ)
{
guswave_dma_irq();
}
if (src & (MIDI_TX_IRQ | MIDI_RX_IRQ))
{
gus_midi_interrupt(0);
}
if (src & (GF1_TIMER1_IRQ | GF1_TIMER2_IRQ))
{
if (gus_timer_enabled)
sound_timer_interrupt();
gus_write8(0x45, 0); /* Ack IRQ */
gus_timer_command(4, 0x80); /* Reset IRQ flags */
}
if (src & (WAVETABLE_IRQ | ENVELOPE_IRQ))
gus_voice_irq();
}
return IRQ_RETVAL(handled);
}
/*
* Some extra code for the 16 bit sampling option
*/
#ifdef CONFIG_SOUND_GUS16
static int __init init_gus_db16(struct address_info *hw_config)
{
struct resource *ports;
ports = request_region(hw_config->io_base, 4, "ad1848");
if (!ports)
return 0;
if (!ad1848_detect(ports, NULL, hw_config->osp)) {
release_region(hw_config->io_base, 4);
return 0;
}
gus_pcm_volume = 100;
gus_wave_volume = 90;
hw_config->slots[3] = ad1848_init("GUS 16 bit sampling", ports,
hw_config->irq,
hw_config->dma,
hw_config->dma, 0,
hw_config->osp,
THIS_MODULE);
return 1;
}
static void __exit unload_gus_db16(struct address_info *hw_config)
{
ad1848_unload(hw_config->io_base,
hw_config->irq,
hw_config->dma,
hw_config->dma, 0);
sound_unload_audiodev(hw_config->slots[3]);
}
#endif
#ifdef CONFIG_SOUND_GUS16
static int gus16;
#endif
#ifdef CONFIG_SOUND_GUSMAX
static int no_wave_dma; /* Set if no dma is to be used for the
wave table (GF1 chip) */
#endif
/*
* Note DMA2 of -1 has the right meaning in the GUS driver as well
* as here.
*/
static struct address_info cfg;
static int __initdata io = -1;
static int __initdata irq = -1;
static int __initdata dma = -1;
static int __initdata dma16 = -1; /* Set this for modules that need it */
static int __initdata type = 0; /* 1 for PnP */
module_param(io, int, 0);
module_param(irq, int, 0);
module_param(dma, int, 0);
module_param(dma16, int, 0);
module_param(type, int, 0);
#ifdef CONFIG_SOUND_GUSMAX
module_param(no_wave_dma, int, 0);
#endif
#ifdef CONFIG_SOUND_GUS16
module_param(db16, int, 0);
module_param(gus16, int, 0);
#endif
MODULE_LICENSE("GPL");
static int __init init_gus(void)
{
printk(KERN_INFO "Gravis Ultrasound audio driver Copyright (C) by Hannu Savolainen 1993-1996\n");
cfg.io_base = io;
cfg.irq = irq;
cfg.dma = dma;
cfg.dma2 = dma16;
cfg.card_subtype = type;
#ifdef CONFIG_SOUND_GUSMAX
gus_no_wave_dma = no_wave_dma;
#endif
if (cfg.io_base == -1 || cfg.dma == -1 || cfg.irq == -1) {
printk(KERN_ERR "I/O, IRQ, and DMA are mandatory\n");
return -EINVAL;
}
#ifdef CONFIG_SOUND_GUS16
if (gus16 && init_gus_db16(&cfg))
db16 = 1;
#endif
if (!probe_gus(&cfg))
return -ENODEV;
attach_gus(&cfg);
return 0;
}
static void __exit cleanup_gus(void)
{
#ifdef CONFIG_SOUND_GUS16
if (db16)
unload_gus_db16(&cfg);
#endif
unload_gus(&cfg);
}
module_init(init_gus);
module_exit(cleanup_gus);
#ifndef MODULE
static int __init setup_gus(char *str)
{
/* io, irq, dma, dma2 */
int ints[5];
str = get_options(str, ARRAY_SIZE(ints), ints);
io = ints[1];
irq = ints[2];
dma = ints[3];
dma16 = ints[4];
return 1;
}
__setup("gus=", setup_gus);
#endif
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