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