395 lines
12 KiB
C
395 lines
12 KiB
C
|
// SPDX-License-Identifier: GPL-2.0-or-later
|
||
|
|
/*
|
||
|
|
* Copyright (c) by Jaroslav Kysela <perex@perex.cz>
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <linux/delay.h>
|
||
|
|
#include <linux/interrupt.h>
|
||
|
|
#include <linux/time.h>
|
||
|
|
#include <sound/core.h>
|
||
|
|
#include <sound/gus.h>
|
||
|
|
|
||
|
|
extern int snd_gf1_synth_init(struct snd_gus_card * gus);
|
||
|
|
extern void snd_gf1_synth_done(struct snd_gus_card * gus);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* ok.. default interrupt handlers...
|
||
|
|
*/
|
||
|
|
|
||
|
|
static void snd_gf1_default_interrupt_handler_midi_out(struct snd_gus_card * gus)
|
||
|
|
{
|
||
|
|
snd_gf1_uart_cmd(gus, gus->gf1.uart_cmd &= ~0x20);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void snd_gf1_default_interrupt_handler_midi_in(struct snd_gus_card * gus)
|
||
|
|
{
|
||
|
|
snd_gf1_uart_cmd(gus, gus->gf1.uart_cmd &= ~0x80);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void snd_gf1_default_interrupt_handler_timer1(struct snd_gus_card * gus)
|
||
|
|
{
|
||
|
|
snd_gf1_i_write8(gus, SNDRV_GF1_GB_SOUND_BLASTER_CONTROL, gus->gf1.timer_enabled &= ~4);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void snd_gf1_default_interrupt_handler_timer2(struct snd_gus_card * gus)
|
||
|
|
{
|
||
|
|
snd_gf1_i_write8(gus, SNDRV_GF1_GB_SOUND_BLASTER_CONTROL, gus->gf1.timer_enabled &= ~8);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void snd_gf1_default_interrupt_handler_wave_and_volume(struct snd_gus_card * gus, struct snd_gus_voice * voice)
|
||
|
|
{
|
||
|
|
snd_gf1_i_ctrl_stop(gus, 0x00);
|
||
|
|
snd_gf1_i_ctrl_stop(gus, 0x0d);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void snd_gf1_default_interrupt_handler_dma_write(struct snd_gus_card * gus)
|
||
|
|
{
|
||
|
|
snd_gf1_i_write8(gus, 0x41, 0x00);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void snd_gf1_default_interrupt_handler_dma_read(struct snd_gus_card * gus)
|
||
|
|
{
|
||
|
|
snd_gf1_i_write8(gus, 0x49, 0x00);
|
||
|
|
}
|
||
|
|
|
||
|
|
void snd_gf1_set_default_handlers(struct snd_gus_card * gus, unsigned int what)
|
||
|
|
{
|
||
|
|
if (what & SNDRV_GF1_HANDLER_MIDI_OUT)
|
||
|
|
gus->gf1.interrupt_handler_midi_out = snd_gf1_default_interrupt_handler_midi_out;
|
||
|
|
if (what & SNDRV_GF1_HANDLER_MIDI_IN)
|
||
|
|
gus->gf1.interrupt_handler_midi_in = snd_gf1_default_interrupt_handler_midi_in;
|
||
|
|
if (what & SNDRV_GF1_HANDLER_TIMER1)
|
||
|
|
gus->gf1.interrupt_handler_timer1 = snd_gf1_default_interrupt_handler_timer1;
|
||
|
|
if (what & SNDRV_GF1_HANDLER_TIMER2)
|
||
|
|
gus->gf1.interrupt_handler_timer2 = snd_gf1_default_interrupt_handler_timer2;
|
||
|
|
if (what & SNDRV_GF1_HANDLER_VOICE) {
|
||
|
|
struct snd_gus_voice *voice;
|
||
|
|
|
||
|
|
voice = &gus->gf1.voices[what & 0xffff];
|
||
|
|
voice->handler_wave =
|
||
|
|
voice->handler_volume = snd_gf1_default_interrupt_handler_wave_and_volume;
|
||
|
|
voice->handler_effect = NULL;
|
||
|
|
voice->volume_change = NULL;
|
||
|
|
}
|
||
|
|
if (what & SNDRV_GF1_HANDLER_DMA_WRITE)
|
||
|
|
gus->gf1.interrupt_handler_dma_write = snd_gf1_default_interrupt_handler_dma_write;
|
||
|
|
if (what & SNDRV_GF1_HANDLER_DMA_READ)
|
||
|
|
gus->gf1.interrupt_handler_dma_read = snd_gf1_default_interrupt_handler_dma_read;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
|
||
|
|
*/
|
||
|
|
|
||
|
|
static void snd_gf1_clear_regs(struct snd_gus_card * gus)
|
||
|
|
{
|
||
|
|
unsigned long flags;
|
||
|
|
|
||
|
|
spin_lock_irqsave(&gus->reg_lock, flags);
|
||
|
|
inb(GUSP(gus, IRQSTAT));
|
||
|
|
snd_gf1_write8(gus, 0x41, 0); /* DRAM DMA Control Register */
|
||
|
|
snd_gf1_write8(gus, 0x45, 0); /* Timer Control */
|
||
|
|
snd_gf1_write8(gus, 0x49, 0); /* Sampling Control Register */
|
||
|
|
spin_unlock_irqrestore(&gus->reg_lock, flags);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void snd_gf1_look_regs(struct snd_gus_card * gus)
|
||
|
|
{
|
||
|
|
unsigned long flags;
|
||
|
|
|
||
|
|
spin_lock_irqsave(&gus->reg_lock, flags);
|
||
|
|
snd_gf1_look8(gus, 0x41); /* DRAM DMA Control Register */
|
||
|
|
snd_gf1_look8(gus, 0x49); /* Sampling Control Register */
|
||
|
|
inb(GUSP(gus, IRQSTAT));
|
||
|
|
snd_gf1_read8(gus, 0x0f); /* IRQ Source Register */
|
||
|
|
spin_unlock_irqrestore(&gus->reg_lock, flags);
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* put selected GF1 voices to initial stage...
|
||
|
|
*/
|
||
|
|
|
||
|
|
void snd_gf1_smart_stop_voice(struct snd_gus_card * gus, unsigned short voice)
|
||
|
|
{
|
||
|
|
unsigned long flags;
|
||
|
|
|
||
|
|
spin_lock_irqsave(&gus->reg_lock, flags);
|
||
|
|
snd_gf1_select_voice(gus, voice);
|
||
|
|
#if 0
|
||
|
|
printk(KERN_DEBUG " -%i- smart stop voice - volume = 0x%x\n", voice, snd_gf1_i_read16(gus, SNDRV_GF1_VW_VOLUME));
|
||
|
|
#endif
|
||
|
|
snd_gf1_ctrl_stop(gus, SNDRV_GF1_VB_ADDRESS_CONTROL);
|
||
|
|
snd_gf1_ctrl_stop(gus, SNDRV_GF1_VB_VOLUME_CONTROL);
|
||
|
|
spin_unlock_irqrestore(&gus->reg_lock, flags);
|
||
|
|
}
|
||
|
|
|
||
|
|
void snd_gf1_stop_voice(struct snd_gus_card * gus, unsigned short voice)
|
||
|
|
{
|
||
|
|
unsigned long flags;
|
||
|
|
|
||
|
|
spin_lock_irqsave(&gus->reg_lock, flags);
|
||
|
|
snd_gf1_select_voice(gus, voice);
|
||
|
|
#if 0
|
||
|
|
printk(KERN_DEBUG " -%i- stop voice - volume = 0x%x\n", voice, snd_gf1_i_read16(gus, SNDRV_GF1_VW_VOLUME));
|
||
|
|
#endif
|
||
|
|
snd_gf1_ctrl_stop(gus, SNDRV_GF1_VB_ADDRESS_CONTROL);
|
||
|
|
snd_gf1_ctrl_stop(gus, SNDRV_GF1_VB_VOLUME_CONTROL);
|
||
|
|
if (gus->gf1.enh_mode)
|
||
|
|
snd_gf1_write8(gus, SNDRV_GF1_VB_ACCUMULATOR, 0);
|
||
|
|
spin_unlock_irqrestore(&gus->reg_lock, flags);
|
||
|
|
#if 0
|
||
|
|
snd_gf1_lfo_shutdown(gus, voice, ULTRA_LFO_VIBRATO);
|
||
|
|
snd_gf1_lfo_shutdown(gus, voice, ULTRA_LFO_TREMOLO);
|
||
|
|
#endif
|
||
|
|
}
|
||
|
|
|
||
|
|
static void snd_gf1_clear_voices(struct snd_gus_card * gus, unsigned short v_min,
|
||
|
|
unsigned short v_max)
|
||
|
|
{
|
||
|
|
unsigned long flags;
|
||
|
|
unsigned int daddr;
|
||
|
|
unsigned short i, w_16;
|
||
|
|
|
||
|
|
daddr = gus->gf1.default_voice_address << 4;
|
||
|
|
for (i = v_min; i <= v_max; i++) {
|
||
|
|
#if 0
|
||
|
|
if (gus->gf1.syn_voices)
|
||
|
|
gus->gf1.syn_voices[i].flags = ~VFLG_DYNAMIC;
|
||
|
|
#endif
|
||
|
|
spin_lock_irqsave(&gus->reg_lock, flags);
|
||
|
|
snd_gf1_select_voice(gus, i);
|
||
|
|
snd_gf1_ctrl_stop(gus, SNDRV_GF1_VB_ADDRESS_CONTROL); /* Voice Control Register = voice stop */
|
||
|
|
snd_gf1_ctrl_stop(gus, SNDRV_GF1_VB_VOLUME_CONTROL); /* Volume Ramp Control Register = ramp off */
|
||
|
|
if (gus->gf1.enh_mode)
|
||
|
|
snd_gf1_write8(gus, SNDRV_GF1_VB_MODE, gus->gf1.memory ? 0x02 : 0x82); /* Deactivate voice */
|
||
|
|
w_16 = snd_gf1_read8(gus, SNDRV_GF1_VB_ADDRESS_CONTROL) & 0x04;
|
||
|
|
snd_gf1_write16(gus, SNDRV_GF1_VW_FREQUENCY, 0x400);
|
||
|
|
snd_gf1_write_addr(gus, SNDRV_GF1_VA_START, daddr, w_16);
|
||
|
|
snd_gf1_write_addr(gus, SNDRV_GF1_VA_END, daddr, w_16);
|
||
|
|
snd_gf1_write8(gus, SNDRV_GF1_VB_VOLUME_START, 0);
|
||
|
|
snd_gf1_write8(gus, SNDRV_GF1_VB_VOLUME_END, 0);
|
||
|
|
snd_gf1_write8(gus, SNDRV_GF1_VB_VOLUME_RATE, 0);
|
||
|
|
snd_gf1_write16(gus, SNDRV_GF1_VW_VOLUME, 0);
|
||
|
|
snd_gf1_write_addr(gus, SNDRV_GF1_VA_CURRENT, daddr, w_16);
|
||
|
|
snd_gf1_write8(gus, SNDRV_GF1_VB_PAN, 7);
|
||
|
|
if (gus->gf1.enh_mode) {
|
||
|
|
snd_gf1_write8(gus, SNDRV_GF1_VB_ACCUMULATOR, 0);
|
||
|
|
snd_gf1_write16(gus, SNDRV_GF1_VW_EFFECT_VOLUME, 0);
|
||
|
|
snd_gf1_write16(gus, SNDRV_GF1_VW_EFFECT_VOLUME_FINAL, 0);
|
||
|
|
}
|
||
|
|
spin_unlock_irqrestore(&gus->reg_lock, flags);
|
||
|
|
#if 0
|
||
|
|
snd_gf1_lfo_shutdown(gus, i, ULTRA_LFO_VIBRATO);
|
||
|
|
snd_gf1_lfo_shutdown(gus, i, ULTRA_LFO_TREMOLO);
|
||
|
|
#endif
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
void snd_gf1_stop_voices(struct snd_gus_card * gus, unsigned short v_min, unsigned short v_max)
|
||
|
|
{
|
||
|
|
unsigned long flags;
|
||
|
|
short i, ramp_ok;
|
||
|
|
unsigned short ramp_end;
|
||
|
|
|
||
|
|
if (!in_interrupt()) { /* this can't be done in interrupt */
|
||
|
|
for (i = v_min, ramp_ok = 0; i <= v_max; i++) {
|
||
|
|
spin_lock_irqsave(&gus->reg_lock, flags);
|
||
|
|
snd_gf1_select_voice(gus, i);
|
||
|
|
ramp_end = snd_gf1_read16(gus, 9) >> 8;
|
||
|
|
if (ramp_end > SNDRV_GF1_MIN_OFFSET) {
|
||
|
|
ramp_ok++;
|
||
|
|
snd_gf1_write8(gus, SNDRV_GF1_VB_VOLUME_RATE, 20); /* ramp rate */
|
||
|
|
snd_gf1_write8(gus, SNDRV_GF1_VB_VOLUME_START, SNDRV_GF1_MIN_OFFSET); /* ramp start */
|
||
|
|
snd_gf1_write8(gus, SNDRV_GF1_VB_VOLUME_END, ramp_end); /* ramp end */
|
||
|
|
snd_gf1_write8(gus, SNDRV_GF1_VB_VOLUME_CONTROL, 0x40); /* ramp down */
|
||
|
|
if (gus->gf1.enh_mode) {
|
||
|
|
snd_gf1_delay(gus);
|
||
|
|
snd_gf1_write8(gus, SNDRV_GF1_VB_VOLUME_CONTROL, 0x40);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
spin_unlock_irqrestore(&gus->reg_lock, flags);
|
||
|
|
}
|
||
|
|
msleep_interruptible(50);
|
||
|
|
}
|
||
|
|
snd_gf1_clear_voices(gus, v_min, v_max);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void snd_gf1_alloc_voice_use(struct snd_gus_card * gus,
|
||
|
|
struct snd_gus_voice * pvoice,
|
||
|
|
int type, int client, int port)
|
||
|
|
{
|
||
|
|
pvoice->use = 1;
|
||
|
|
switch (type) {
|
||
|
|
case SNDRV_GF1_VOICE_TYPE_PCM:
|
||
|
|
gus->gf1.pcm_alloc_voices++;
|
||
|
|
pvoice->pcm = 1;
|
||
|
|
break;
|
||
|
|
case SNDRV_GF1_VOICE_TYPE_SYNTH:
|
||
|
|
pvoice->synth = 1;
|
||
|
|
pvoice->client = client;
|
||
|
|
pvoice->port = port;
|
||
|
|
break;
|
||
|
|
case SNDRV_GF1_VOICE_TYPE_MIDI:
|
||
|
|
pvoice->midi = 1;
|
||
|
|
pvoice->client = client;
|
||
|
|
pvoice->port = port;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
struct snd_gus_voice *snd_gf1_alloc_voice(struct snd_gus_card * gus, int type, int client, int port)
|
||
|
|
{
|
||
|
|
struct snd_gus_voice *pvoice;
|
||
|
|
unsigned long flags;
|
||
|
|
int idx;
|
||
|
|
|
||
|
|
spin_lock_irqsave(&gus->voice_alloc, flags);
|
||
|
|
if (type == SNDRV_GF1_VOICE_TYPE_PCM) {
|
||
|
|
if (gus->gf1.pcm_alloc_voices >= gus->gf1.pcm_channels) {
|
||
|
|
spin_unlock_irqrestore(&gus->voice_alloc, flags);
|
||
|
|
return NULL;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
for (idx = 0; idx < 32; idx++) {
|
||
|
|
pvoice = &gus->gf1.voices[idx];
|
||
|
|
if (!pvoice->use) {
|
||
|
|
snd_gf1_alloc_voice_use(gus, pvoice, type, client, port);
|
||
|
|
spin_unlock_irqrestore(&gus->voice_alloc, flags);
|
||
|
|
return pvoice;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
for (idx = 0; idx < 32; idx++) {
|
||
|
|
pvoice = &gus->gf1.voices[idx];
|
||
|
|
if (pvoice->midi && !pvoice->client) {
|
||
|
|
snd_gf1_clear_voices(gus, pvoice->number, pvoice->number);
|
||
|
|
snd_gf1_alloc_voice_use(gus, pvoice, type, client, port);
|
||
|
|
spin_unlock_irqrestore(&gus->voice_alloc, flags);
|
||
|
|
return pvoice;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
spin_unlock_irqrestore(&gus->voice_alloc, flags);
|
||
|
|
return NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
void snd_gf1_free_voice(struct snd_gus_card * gus, struct snd_gus_voice *voice)
|
||
|
|
{
|
||
|
|
unsigned long flags;
|
||
|
|
void (*private_free)(struct snd_gus_voice *voice);
|
||
|
|
|
||
|
|
if (voice == NULL || !voice->use)
|
||
|
|
return;
|
||
|
|
snd_gf1_set_default_handlers(gus, SNDRV_GF1_HANDLER_VOICE | voice->number);
|
||
|
|
snd_gf1_clear_voices(gus, voice->number, voice->number);
|
||
|
|
spin_lock_irqsave(&gus->voice_alloc, flags);
|
||
|
|
private_free = voice->private_free;
|
||
|
|
voice->private_free = NULL;
|
||
|
|
voice->private_data = NULL;
|
||
|
|
if (voice->pcm)
|
||
|
|
gus->gf1.pcm_alloc_voices--;
|
||
|
|
voice->use = voice->pcm = 0;
|
||
|
|
voice->sample_ops = NULL;
|
||
|
|
spin_unlock_irqrestore(&gus->voice_alloc, flags);
|
||
|
|
if (private_free)
|
||
|
|
private_free(voice);
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* call this function only by start of driver
|
||
|
|
*/
|
||
|
|
|
||
|
|
int snd_gf1_start(struct snd_gus_card * gus)
|
||
|
|
{
|
||
|
|
unsigned long flags;
|
||
|
|
unsigned int i;
|
||
|
|
|
||
|
|
snd_gf1_i_write8(gus, SNDRV_GF1_GB_RESET, 0); /* reset GF1 */
|
||
|
|
udelay(160);
|
||
|
|
snd_gf1_i_write8(gus, SNDRV_GF1_GB_RESET, 1); /* disable IRQ & DAC */
|
||
|
|
udelay(160);
|
||
|
|
snd_gf1_i_write8(gus, SNDRV_GF1_GB_JOYSTICK_DAC_LEVEL, gus->joystick_dac);
|
||
|
|
|
||
|
|
snd_gf1_set_default_handlers(gus, SNDRV_GF1_HANDLER_ALL);
|
||
|
|
for (i = 0; i < 32; i++) {
|
||
|
|
gus->gf1.voices[i].number = i;
|
||
|
|
snd_gf1_set_default_handlers(gus, SNDRV_GF1_HANDLER_VOICE | i);
|
||
|
|
}
|
||
|
|
|
||
|
|
snd_gf1_uart_cmd(gus, 0x03); /* huh.. this cleanup took me some time... */
|
||
|
|
|
||
|
|
if (gus->gf1.enh_mode) { /* enhanced mode !!!! */
|
||
|
|
snd_gf1_i_write8(gus, SNDRV_GF1_GB_GLOBAL_MODE, snd_gf1_i_look8(gus, SNDRV_GF1_GB_GLOBAL_MODE) | 0x01);
|
||
|
|
snd_gf1_i_write8(gus, SNDRV_GF1_GB_MEMORY_CONTROL, 0x01);
|
||
|
|
}
|
||
|
|
snd_gf1_clear_regs(gus);
|
||
|
|
snd_gf1_select_active_voices(gus);
|
||
|
|
snd_gf1_delay(gus);
|
||
|
|
gus->gf1.default_voice_address = gus->gf1.memory > 0 ? 0 : 512 - 8;
|
||
|
|
/* initialize LFOs & clear LFOs memory */
|
||
|
|
if (gus->gf1.enh_mode && gus->gf1.memory) {
|
||
|
|
gus->gf1.hw_lfo = 1;
|
||
|
|
gus->gf1.default_voice_address += 1024;
|
||
|
|
} else {
|
||
|
|
gus->gf1.sw_lfo = 1;
|
||
|
|
}
|
||
|
|
#if 0
|
||
|
|
snd_gf1_lfo_init(gus);
|
||
|
|
#endif
|
||
|
|
if (gus->gf1.memory > 0)
|
||
|
|
for (i = 0; i < 4; i++)
|
||
|
|
snd_gf1_poke(gus, gus->gf1.default_voice_address + i, 0);
|
||
|
|
snd_gf1_clear_regs(gus);
|
||
|
|
snd_gf1_clear_voices(gus, 0, 31);
|
||
|
|
snd_gf1_look_regs(gus);
|
||
|
|
udelay(160);
|
||
|
|
snd_gf1_i_write8(gus, SNDRV_GF1_GB_RESET, 7); /* Reset Register = IRQ enable, DAC enable */
|
||
|
|
udelay(160);
|
||
|
|
snd_gf1_i_write8(gus, SNDRV_GF1_GB_RESET, 7); /* Reset Register = IRQ enable, DAC enable */
|
||
|
|
if (gus->gf1.enh_mode) { /* enhanced mode !!!! */
|
||
|
|
snd_gf1_i_write8(gus, SNDRV_GF1_GB_GLOBAL_MODE, snd_gf1_i_look8(gus, SNDRV_GF1_GB_GLOBAL_MODE) | 0x01);
|
||
|
|
snd_gf1_i_write8(gus, SNDRV_GF1_GB_MEMORY_CONTROL, 0x01);
|
||
|
|
}
|
||
|
|
while ((snd_gf1_i_read8(gus, SNDRV_GF1_GB_VOICES_IRQ) & 0xc0) != 0xc0);
|
||
|
|
|
||
|
|
spin_lock_irqsave(&gus->reg_lock, flags);
|
||
|
|
outb(gus->gf1.active_voice = 0, GUSP(gus, GF1PAGE));
|
||
|
|
outb(gus->mix_cntrl_reg, GUSP(gus, MIXCNTRLREG));
|
||
|
|
spin_unlock_irqrestore(&gus->reg_lock, flags);
|
||
|
|
|
||
|
|
snd_gf1_timers_init(gus);
|
||
|
|
snd_gf1_look_regs(gus);
|
||
|
|
snd_gf1_mem_init(gus);
|
||
|
|
snd_gf1_mem_proc_init(gus);
|
||
|
|
#ifdef CONFIG_SND_DEBUG
|
||
|
|
snd_gus_irq_profile_init(gus);
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#if 0
|
||
|
|
if (gus->pnp_flag) {
|
||
|
|
if (gus->chip.playback_fifo_size > 0)
|
||
|
|
snd_gf1_i_write16(gus, SNDRV_GF1_GW_FIFO_RECORD_BASE_ADDR, gus->chip.playback_fifo_block->ptr >> 8);
|
||
|
|
if (gus->chip.record_fifo_size > 0)
|
||
|
|
snd_gf1_i_write16(gus, SNDRV_GF1_GW_FIFO_PLAY_BASE_ADDR, gus->chip.record_fifo_block->ptr >> 8);
|
||
|
|
snd_gf1_i_write16(gus, SNDRV_GF1_GW_FIFO_SIZE, gus->chip.interwave_fifo_reg);
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* call this function only by shutdown of driver
|
||
|
|
*/
|
||
|
|
|
||
|
|
int snd_gf1_stop(struct snd_gus_card * gus)
|
||
|
|
{
|
||
|
|
snd_gf1_i_write8(gus, SNDRV_GF1_GB_SOUND_BLASTER_CONTROL, 0); /* stop all timers */
|
||
|
|
snd_gf1_stop_voices(gus, 0, 31); /* stop all voices */
|
||
|
|
snd_gf1_i_write8(gus, SNDRV_GF1_GB_RESET, 1); /* disable IRQ & DAC */
|
||
|
|
snd_gf1_timers_done(gus);
|
||
|
|
snd_gf1_mem_done(gus);
|
||
|
|
#if 0
|
||
|
|
snd_gf1_lfo_done(gus);
|
||
|
|
#endif
|
||
|
|
return 0;
|
||
|
|
}
|