sound/isa/gus/gus_reset.c - linux - Git at Google

 // 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;
 }
	// 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;
	}