gus_reset.c

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/*
 *  Copyright (c) by Jaroslav Kysela <[email protected]>
 *
 *
 *   This program is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation; either version 2 of the License, or
 *   (at your option) any later version.
 *
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with this program; if not, write to the Free Software
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 *
 */

#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/time.h>
#include <sound/core.h>
#include <sound/gus.h>

extern void snd_gf1_timers_init(struct snd_gus_card * gus);
extern void snd_gf1_timers_done(struct snd_gus_card * gus);
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);
    void *private_data;

    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;
    private_data = voice->private_data;
    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;
}