LXR linux/sound/isa/gus/gus

   1// SPDX-License-Identifier: GPL-2.0-or-later
   2/*
   3 *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
   4 */
   5
   6#include <linux/delay.h>
   7#include <linux/interrupt.h>
   8#include <linux/time.h>
   9#include <sound/core.h>
  10#include <sound/gus.h>
  11
  12extern void snd_gf1_timers_init(struct snd_gus_card * gus);
  13extern void snd_gf1_timers_done(struct snd_gus_card * gus);
  14extern int snd_gf1_synth_init(struct snd_gus_card * gus);
  15extern void snd_gf1_synth_done(struct snd_gus_card * gus);
  16
  17/*
  18 *  ok.. default interrupt handlers...
  19 */
  20
  21static void snd_gf1_default_interrupt_handler_midi_out(struct snd_gus_card * gus)
  22{
  23        snd_gf1_uart_cmd(gus, gus->gf1.uart_cmd &= ~0x20);
  24}
  25
  26static void snd_gf1_default_interrupt_handler_midi_in(struct snd_gus_card * gus)
  27{
  28        snd_gf1_uart_cmd(gus, gus->gf1.uart_cmd &= ~0x80);
  29}
  30
  31static void snd_gf1_default_interrupt_handler_timer1(struct snd_gus_card * gus)
  32{
  33        snd_gf1_i_write8(gus, SNDRV_GF1_GB_SOUND_BLASTER_CONTROL, gus->gf1.timer_enabled &= ~4);
  34}
  35
  36static void snd_gf1_default_interrupt_handler_timer2(struct snd_gus_card * gus)
  37{
  38        snd_gf1_i_write8(gus, SNDRV_GF1_GB_SOUND_BLASTER_CONTROL, gus->gf1.timer_enabled &= ~8);
  39}
  40
  41static void snd_gf1_default_interrupt_handler_wave_and_volume(struct snd_gus_card * gus, struct snd_gus_voice * voice)
  42{
  43        snd_gf1_i_ctrl_stop(gus, 0x00);
  44        snd_gf1_i_ctrl_stop(gus, 0x0d);
  45}
  46
  47static void snd_gf1_default_interrupt_handler_dma_write(struct snd_gus_card * gus)
  48{
  49        snd_gf1_i_write8(gus, 0x41, 0x00);
  50}
  51
  52static void snd_gf1_default_interrupt_handler_dma_read(struct snd_gus_card * gus)
  53{
  54        snd_gf1_i_write8(gus, 0x49, 0x00);
  55}
  56
  57void snd_gf1_set_default_handlers(struct snd_gus_card * gus, unsigned int what)
  58{
  59        if (what & SNDRV_GF1_HANDLER_MIDI_OUT)
  60                gus->gf1.interrupt_handler_midi_out = snd_gf1_default_interrupt_handler_midi_out;
  61        if (what & SNDRV_GF1_HANDLER_MIDI_IN)
  62                gus->gf1.interrupt_handler_midi_in = snd_gf1_default_interrupt_handler_midi_in;
  63        if (what & SNDRV_GF1_HANDLER_TIMER1)
  64                gus->gf1.interrupt_handler_timer1 = snd_gf1_default_interrupt_handler_timer1;
  65        if (what & SNDRV_GF1_HANDLER_TIMER2)
  66                gus->gf1.interrupt_handler_timer2 = snd_gf1_default_interrupt_handler_timer2;
  67        if (what & SNDRV_GF1_HANDLER_VOICE) {
  68                struct snd_gus_voice *voice;
  69                
  70                voice = &gus->gf1.voices[what & 0xffff];
  71                voice->handler_wave =
  72                voice->handler_volume = snd_gf1_default_interrupt_handler_wave_and_volume;
  73                voice->handler_effect = NULL;
  74                voice->volume_change = NULL;
  75        }
  76        if (what & SNDRV_GF1_HANDLER_DMA_WRITE)
  77                gus->gf1.interrupt_handler_dma_write = snd_gf1_default_interrupt_handler_dma_write;
  78        if (what & SNDRV_GF1_HANDLER_DMA_READ)
  79                gus->gf1.interrupt_handler_dma_read = snd_gf1_default_interrupt_handler_dma_read;
  80}
  81
  82/*
  83
  84 */
  85
  86static void snd_gf1_clear_regs(struct snd_gus_card * gus)
  87{
  88        unsigned long flags;
  89
  90        spin_lock_irqsave(&gus->reg_lock, flags);
  91        inb(GUSP(gus, IRQSTAT));
  92        snd_gf1_write8(gus, 0x41, 0);   /* DRAM DMA Control Register */
  93        snd_gf1_write8(gus, 0x45, 0);   /* Timer Control */
  94        snd_gf1_write8(gus, 0x49, 0);   /* Sampling Control Register */
  95        spin_unlock_irqrestore(&gus->reg_lock, flags);
  96}
  97
  98static void snd_gf1_look_regs(struct snd_gus_card * gus)
  99{
 100        unsigned long flags;
 101
 102        spin_lock_irqsave(&gus->reg_lock, flags);
 103        snd_gf1_look8(gus, 0x41);       /* DRAM DMA Control Register */
 104        snd_gf1_look8(gus, 0x49);       /* Sampling Control Register */
 105        inb(GUSP(gus, IRQSTAT));
 106        snd_gf1_read8(gus, 0x0f);       /* IRQ Source Register */
 107        spin_unlock_irqrestore(&gus->reg_lock, flags);
 108}
 109
 110/*
 111 *  put selected GF1 voices to initial stage...
 112 */
 113
 114void snd_gf1_smart_stop_voice(struct snd_gus_card * gus, unsigned short voice)
 115{
 116        unsigned long flags;
 117
 118        spin_lock_irqsave(&gus->reg_lock, flags);
 119        snd_gf1_select_voice(gus, voice);
 120#if 0
 121        printk(KERN_DEBUG " -%i- smart stop voice - volume = 0x%x\n", voice, snd_gf1_i_read16(gus, SNDRV_GF1_VW_VOLUME));
 122#endif
 123        snd_gf1_ctrl_stop(gus, SNDRV_GF1_VB_ADDRESS_CONTROL);
 124        snd_gf1_ctrl_stop(gus, SNDRV_GF1_VB_VOLUME_CONTROL);
 125        spin_unlock_irqrestore(&gus->reg_lock, flags);
 126}
 127
 128void snd_gf1_stop_voice(struct snd_gus_card * gus, unsigned short voice)
 129{
 130        unsigned long flags;
 131
 132        spin_lock_irqsave(&gus->reg_lock, flags);
 133        snd_gf1_select_voice(gus, voice);
 134#if 0
 135        printk(KERN_DEBUG " -%i- stop voice - volume = 0x%x\n", voice, snd_gf1_i_read16(gus, SNDRV_GF1_VW_VOLUME));
 136#endif
 137        snd_gf1_ctrl_stop(gus, SNDRV_GF1_VB_ADDRESS_CONTROL);
 138        snd_gf1_ctrl_stop(gus, SNDRV_GF1_VB_VOLUME_CONTROL);
 139        if (gus->gf1.enh_mode)
 140                snd_gf1_write8(gus, SNDRV_GF1_VB_ACCUMULATOR, 0);
 141        spin_unlock_irqrestore(&gus->reg_lock, flags);
 142#if 0
 143        snd_gf1_lfo_shutdown(gus, voice, ULTRA_LFO_VIBRATO);
 144        snd_gf1_lfo_shutdown(gus, voice, ULTRA_LFO_TREMOLO);
 145#endif
 146}
 147
 148static void snd_gf1_clear_voices(struct snd_gus_card * gus, unsigned short v_min,
 149                                 unsigned short v_max)
 150{
 151        unsigned long flags;
 152        unsigned int daddr;
 153        unsigned short i, w_16;
 154
 155        daddr = gus->gf1.default_voice_address << 4;
 156        for (i = v_min; i <= v_max; i++) {
 157#if 0
 158                if (gus->gf1.syn_voices)
 159                        gus->gf1.syn_voices[i].flags = ~VFLG_DYNAMIC;
 160#endif
 161                spin_lock_irqsave(&gus->reg_lock, flags);
 162                snd_gf1_select_voice(gus, i);
 163                snd_gf1_ctrl_stop(gus, SNDRV_GF1_VB_ADDRESS_CONTROL);   /* Voice Control Register = voice stop */
 164                snd_gf1_ctrl_stop(gus, SNDRV_GF1_VB_VOLUME_CONTROL);    /* Volume Ramp Control Register = ramp off */
 165                if (gus->gf1.enh_mode)
 166                        snd_gf1_write8(gus, SNDRV_GF1_VB_MODE, gus->gf1.memory ? 0x02 : 0x82);  /* Deactivate voice */
 167                w_16 = snd_gf1_read8(gus, SNDRV_GF1_VB_ADDRESS_CONTROL) & 0x04;
 168                snd_gf1_write16(gus, SNDRV_GF1_VW_FREQUENCY, 0x400);
 169                snd_gf1_write_addr(gus, SNDRV_GF1_VA_START, daddr, w_16);
 170                snd_gf1_write_addr(gus, SNDRV_GF1_VA_END, daddr, w_16);
 171                snd_gf1_write8(gus, SNDRV_GF1_VB_VOLUME_START, 0);
 172                snd_gf1_write8(gus, SNDRV_GF1_VB_VOLUME_END, 0);
 173                snd_gf1_write8(gus, SNDRV_GF1_VB_VOLUME_RATE, 0);
 174                snd_gf1_write16(gus, SNDRV_GF1_VW_VOLUME, 0);
 175                snd_gf1_write_addr(gus, SNDRV_GF1_VA_CURRENT, daddr, w_16);
 176                snd_gf1_write8(gus, SNDRV_GF1_VB_PAN, 7);
 177                if (gus->gf1.enh_mode) {
 178                        snd_gf1_write8(gus, SNDRV_GF1_VB_ACCUMULATOR, 0);
 179                        snd_gf1_write16(gus, SNDRV_GF1_VW_EFFECT_VOLUME, 0);
 180                        snd_gf1_write16(gus, SNDRV_GF1_VW_EFFECT_VOLUME_FINAL, 0);
 181                }
 182                spin_unlock_irqrestore(&gus->reg_lock, flags);
 183#if 0
 184                snd_gf1_lfo_shutdown(gus, i, ULTRA_LFO_VIBRATO);
 185                snd_gf1_lfo_shutdown(gus, i, ULTRA_LFO_TREMOLO);
 186#endif
 187        }
 188}
 189
 190void snd_gf1_stop_voices(struct snd_gus_card * gus, unsigned short v_min, unsigned short v_max)
 191{
 192        unsigned long flags;
 193        short i, ramp_ok;
 194        unsigned short ramp_end;
 195
 196        if (!in_interrupt()) {  /* this can't be done in interrupt */
 197                for (i = v_min, ramp_ok = 0; i <= v_max; i++) {
 198                        spin_lock_irqsave(&gus->reg_lock, flags);
 199                        snd_gf1_select_voice(gus, i);
 200                        ramp_end = snd_gf1_read16(gus, 9) >> 8;
 201                        if (ramp_end > SNDRV_GF1_MIN_OFFSET) {
 202                                ramp_ok++;
 203                                snd_gf1_write8(gus, SNDRV_GF1_VB_VOLUME_RATE, 20);      /* ramp rate */
 204                                snd_gf1_write8(gus, SNDRV_GF1_VB_VOLUME_START, SNDRV_GF1_MIN_OFFSET);   /* ramp start */
 205                                snd_gf1_write8(gus, SNDRV_GF1_VB_VOLUME_END, ramp_end); /* ramp end */
 206                                snd_gf1_write8(gus, SNDRV_GF1_VB_VOLUME_CONTROL, 0x40); /* ramp down */
 207                                if (gus->gf1.enh_mode) {
 208                                        snd_gf1_delay(gus);
 209                                        snd_gf1_write8(gus, SNDRV_GF1_VB_VOLUME_CONTROL, 0x40);
 210                                }
 211                        }
 212                        spin_unlock_irqrestore(&gus->reg_lock, flags);
 213                }
 214                msleep_interruptible(50);
 215        }
 216        snd_gf1_clear_voices(gus, v_min, v_max);
 217}
 218
 219static void snd_gf1_alloc_voice_use(struct snd_gus_card * gus, 
 220                                    struct snd_gus_voice * pvoice,
 221                                    int type, int client, int port)
 222{
 223        pvoice->use = 1;
 224        switch (type) {
 225        case SNDRV_GF1_VOICE_TYPE_PCM:
 226                gus->gf1.pcm_alloc_voices++;
 227                pvoice->pcm = 1;
 228                break;
 229        case SNDRV_GF1_VOICE_TYPE_SYNTH:
 230                pvoice->synth = 1;
 231                pvoice->client = client;
 232                pvoice->port = port;
 233                break;
 234        case SNDRV_GF1_VOICE_TYPE_MIDI:
 235                pvoice->midi = 1;
 236                pvoice->client = client;
 237                pvoice->port = port;
 238                break;
 239        }
 240}
 241
 242struct snd_gus_voice *snd_gf1_alloc_voice(struct snd_gus_card * gus, int type, int client, int port)
 243{
 244        struct snd_gus_voice *pvoice;
 245        unsigned long flags;
 246        int idx;
 247
 248        spin_lock_irqsave(&gus->voice_alloc, flags);
 249        if (type == SNDRV_GF1_VOICE_TYPE_PCM) {
 250                if (gus->gf1.pcm_alloc_voices >= gus->gf1.pcm_channels) {
 251                        spin_unlock_irqrestore(&gus->voice_alloc, flags);
 252                        return NULL;
 253                }
 254        }
 255        for (idx = 0; idx < 32; idx++) {
 256                pvoice = &gus->gf1.voices[idx];
 257                if (!pvoice->use) {
 258                        snd_gf1_alloc_voice_use(gus, pvoice, type, client, port);
 259                        spin_unlock_irqrestore(&gus->voice_alloc, flags);
 260                        return pvoice;
 261                }
 262        } 
 263        for (idx = 0; idx < 32; idx++) {
 264                pvoice = &gus->gf1.voices[idx];
 265                if (pvoice->midi && !pvoice->client) {
 266                        snd_gf1_clear_voices(gus, pvoice->number, pvoice->number);
 267                        snd_gf1_alloc_voice_use(gus, pvoice, type, client, port);
 268                        spin_unlock_irqrestore(&gus->voice_alloc, flags);
 269                        return pvoice;
 270                }
 271        } 
 272        spin_unlock_irqrestore(&gus->voice_alloc, flags);
 273        return NULL;
 274}
 275
 276void snd_gf1_free_voice(struct snd_gus_card * gus, struct snd_gus_voice *voice)
 277{
 278        unsigned long flags;
 279        void (*private_free)(struct snd_gus_voice *voice);
 280
 281        if (voice == NULL || !voice->use)
 282                return;
 283        snd_gf1_set_default_handlers(gus, SNDRV_GF1_HANDLER_VOICE | voice->number);
 284        snd_gf1_clear_voices(gus, voice->number, voice->number);
 285        spin_lock_irqsave(&gus->voice_alloc, flags);
 286        private_free = voice->private_free;
 287        voice->private_free = NULL;
 288        voice->private_data = NULL;
 289        if (voice->pcm)
 290                gus->gf1.pcm_alloc_voices--;
 291        voice->use = voice->pcm = 0;
 292        voice->sample_ops = NULL;
 293        spin_unlock_irqrestore(&gus->voice_alloc, flags);
 294        if (private_free)
 295                private_free(voice);
 296}
 297
 298/*
 299 *  call this function only by start of driver
 300 */
 301
 302int snd_gf1_start(struct snd_gus_card * gus)
 303{
 304        unsigned long flags;
 305        unsigned int i;
 306
 307        snd_gf1_i_write8(gus, SNDRV_GF1_GB_RESET, 0);   /* reset GF1 */
 308        udelay(160);
 309        snd_gf1_i_write8(gus, SNDRV_GF1_GB_RESET, 1);   /* disable IRQ & DAC */
 310        udelay(160);
 311        snd_gf1_i_write8(gus, SNDRV_GF1_GB_JOYSTICK_DAC_LEVEL, gus->joystick_dac);
 312
 313        snd_gf1_set_default_handlers(gus, SNDRV_GF1_HANDLER_ALL);
 314        for (i = 0; i < 32; i++) {
 315                gus->gf1.voices[i].number = i;
 316                snd_gf1_set_default_handlers(gus, SNDRV_GF1_HANDLER_VOICE | i);
 317        }
 318
 319        snd_gf1_uart_cmd(gus, 0x03);    /* huh.. this cleanup took me some time... */
 320
 321        if (gus->gf1.enh_mode) {        /* enhanced mode !!!! */
 322                snd_gf1_i_write8(gus, SNDRV_GF1_GB_GLOBAL_MODE, snd_gf1_i_look8(gus, SNDRV_GF1_GB_GLOBAL_MODE) | 0x01);
 323                snd_gf1_i_write8(gus, SNDRV_GF1_GB_MEMORY_CONTROL, 0x01);
 324        }
 325        snd_gf1_clear_regs(gus);
 326        snd_gf1_select_active_voices(gus);
 327        snd_gf1_delay(gus);
 328        gus->gf1.default_voice_address = gus->gf1.memory > 0 ? 0 : 512 - 8;
 329        /* initialize LFOs & clear LFOs memory */
 330        if (gus->gf1.enh_mode && gus->gf1.memory) {
 331                gus->gf1.hw_lfo = 1;
 332                gus->gf1.default_voice_address += 1024;
 333        } else {
 334                gus->gf1.sw_lfo = 1;
 335        }
 336#if 0
 337        snd_gf1_lfo_init(gus);
 338#endif
 339        if (gus->gf1.memory > 0)
 340                for (i = 0; i < 4; i++)
 341                        snd_gf1_poke(gus, gus->gf1.default_voice_address + i, 0);
 342        snd_gf1_clear_regs(gus);
 343        snd_gf1_clear_voices(gus, 0, 31);
 344        snd_gf1_look_regs(gus);
 345        udelay(160);
 346        snd_gf1_i_write8(gus, SNDRV_GF1_GB_RESET, 7);   /* Reset Register = IRQ enable, DAC enable */
 347        udelay(160);
 348        snd_gf1_i_write8(gus, SNDRV_GF1_GB_RESET, 7);   /* Reset Register = IRQ enable, DAC enable */
 349        if (gus->gf1.enh_mode) {        /* enhanced mode !!!! */
 350                snd_gf1_i_write8(gus, SNDRV_GF1_GB_GLOBAL_MODE, snd_gf1_i_look8(gus, SNDRV_GF1_GB_GLOBAL_MODE) | 0x01);
 351                snd_gf1_i_write8(gus, SNDRV_GF1_GB_MEMORY_CONTROL, 0x01);
 352        }
 353        while ((snd_gf1_i_read8(gus, SNDRV_GF1_GB_VOICES_IRQ) & 0xc0) != 0xc0);
 354
 355        spin_lock_irqsave(&gus->reg_lock, flags);
 356        outb(gus->gf1.active_voice = 0, GUSP(gus, GF1PAGE));
 357        outb(gus->mix_cntrl_reg, GUSP(gus, MIXCNTRLREG));
 358        spin_unlock_irqrestore(&gus->reg_lock, flags);
 359
 360        snd_gf1_timers_init(gus);
 361        snd_gf1_look_regs(gus);
 362        snd_gf1_mem_init(gus);
 363        snd_gf1_mem_proc_init(gus);
 364#ifdef CONFIG_SND_DEBUG
 365        snd_gus_irq_profile_init(gus);
 366#endif
 367
 368#if 0
 369        if (gus->pnp_flag) {
 370                if (gus->chip.playback_fifo_size > 0)
 371                        snd_gf1_i_write16(gus, SNDRV_GF1_GW_FIFO_RECORD_BASE_ADDR, gus->chip.playback_fifo_block->ptr >> 8);
 372                if (gus->chip.record_fifo_size > 0)
 373                        snd_gf1_i_write16(gus, SNDRV_GF1_GW_FIFO_PLAY_BASE_ADDR, gus->chip.record_fifo_block->ptr >> 8);
 374                snd_gf1_i_write16(gus, SNDRV_GF1_GW_FIFO_SIZE, gus->chip.interwave_fifo_reg);
 375        }
 376#endif
 377
 378        return 0;
 379}
 380
 381/*
 382 *  call this function only by shutdown of driver
 383 */
 384
 385int snd_gf1_stop(struct snd_gus_card * gus)
 386{
 387        snd_gf1_i_write8(gus, SNDRV_GF1_GB_SOUND_BLASTER_CONTROL, 0); /* stop all timers */
 388        snd_gf1_stop_voices(gus, 0, 31);                /* stop all voices */
 389        snd_gf1_i_write8(gus, SNDRV_GF1_GB_RESET, 1);   /* disable IRQ & DAC */
 390        snd_gf1_timers_done(gus);
 391        snd_gf1_mem_done(gus);
 392#if 0
 393        snd_gf1_lfo_done(gus);
 394#endif
 395        return 0;
 396}
 397