sound/isa/gus/gus_pcm.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
   4  *  Routines for control of GF1 chip (PCM things)
   5  *
   6  *  InterWave chips supports interleaved DMA, but this feature isn't used in
   7  *  this code.
   8  *
   9  *  This code emulates autoinit DMA transfer for playback, recording by GF1
  10  *  chip doesn't support autoinit DMA.
  11  */
  12
  13 #include <asm/dma.h>
  14 #include <linux/slab.h>
  15 #include <linux/sched/signal.h>
  16
  17 #include <sound/core.h>
  18 #include <sound/control.h>
  19 #include <sound/gus.h>
  20 #include <sound/pcm_params.h>
  21 #include "gus_tables.h"
  22
  23 /* maximum rate */
  24
  25 #define SNDRV_GF1_PCM_RATE              48000
  26
  27 #define SNDRV_GF1_PCM_PFLG_NONE         0
  28 #define SNDRV_GF1_PCM_PFLG_ACTIVE       (1<<0)
  29 #define SNDRV_GF1_PCM_PFLG_NEUTRAL      (2<<0)
  30
  31 struct gus_pcm_private {
  32         struct snd_gus_card * gus;
  33         struct snd_pcm_substream *substream;
  34         spinlock_t lock;
  35         unsigned int voices;
  36         struct snd_gus_voice *pvoices[2];
  37         unsigned int memory;
  38         unsigned short flags;
  39         unsigned char voice_ctrl, ramp_ctrl;
  40         unsigned int bpos;
  41         unsigned int blocks;
  42         unsigned int block_size;
  43         unsigned int dma_size;
  44         wait_queue_head_t sleep;
  45         atomic_t dma_count;
  46         int final_volume;
  47 };
  48
  49 static void snd_gf1_pcm_block_change_ack(struct snd_gus_card * gus, void *private_data)
  50 {
  51         struct gus_pcm_private *pcmp = private_data;
  52
  53         if (pcmp) {
  54                 atomic_dec(&pcmp->dma_count);
  55                 wake_up(&pcmp->sleep);
  56         }
  57 }
  58
  59 static int snd_gf1_pcm_block_change(struct snd_pcm_substream *substream,
  60                                     unsigned int offset,
  61                                     unsigned int addr,
  62                                     unsigned int count)
  63 {
  64         struct snd_gf1_dma_block block;
  65         struct snd_pcm_runtime *runtime = substream->runtime;
  66         struct gus_pcm_private *pcmp = runtime->private_data;
  67
  68         count += offset & 31;
  69         offset &= ~31;
  70         /*
  71         snd_printk(KERN_DEBUG "block change - offset = 0x%x, count = 0x%x\n",
  72                    offset, count);
  73         */
  74         memset(&block, 0, sizeof(block));
  75         block.cmd = SNDRV_GF1_DMA_IRQ;
  76         if (snd_pcm_format_unsigned(runtime->format))
  77                 block.cmd |= SNDRV_GF1_DMA_UNSIGNED;
  78         if (snd_pcm_format_width(runtime->format) == 16)
  79                 block.cmd |= SNDRV_GF1_DMA_16BIT;
  80         block.addr = addr & ~31;
  81         block.buffer = runtime->dma_area + offset;
  82         block.buf_addr = runtime->dma_addr + offset;
  83         block.count = count;
  84         block.private_data = pcmp;
  85         block.ack = snd_gf1_pcm_block_change_ack;
  86         if (!snd_gf1_dma_transfer_block(pcmp->gus, &block, 0, 0))
  87                 atomic_inc(&pcmp->dma_count);
  88         return 0;
  89 }
  90
  91 static void snd_gf1_pcm_trigger_up(struct snd_pcm_substream *substream)
  92 {
  93         struct snd_pcm_runtime *runtime = substream->runtime;
  94         struct gus_pcm_private *pcmp = runtime->private_data;
  95         struct snd_gus_card * gus = pcmp->gus;
  96         unsigned long flags;
  97         unsigned char voice_ctrl, ramp_ctrl;
  98         unsigned short rate;
  99         unsigned int curr, begin, end;
 100         unsigned short vol;
 101         unsigned char pan;
 102         unsigned int voice;
 103
 104         spin_lock_irqsave(&pcmp->lock, flags);
 105         if (pcmp->flags & SNDRV_GF1_PCM_PFLG_ACTIVE) {
 106                 spin_unlock_irqrestore(&pcmp->lock, flags);
 107                 return;
 108         }
 109         pcmp->flags |= SNDRV_GF1_PCM_PFLG_ACTIVE;
 110         pcmp->final_volume = 0;
 111         spin_unlock_irqrestore(&pcmp->lock, flags);
 112         rate = snd_gf1_translate_freq(gus, runtime->rate << 4);
 113         /* enable WAVE IRQ */
 114         voice_ctrl = snd_pcm_format_width(runtime->format) == 16 ? 0x24 : 0x20;
 115         /* enable RAMP IRQ + rollover */
 116         ramp_ctrl = 0x24;
 117         if (pcmp->blocks == 1) {
 118                 voice_ctrl |= 0x08;     /* loop enable */
 119                 ramp_ctrl &= ~0x04;     /* disable rollover */
 120         }
 121         for (voice = 0; voice < pcmp->voices; voice++) {
 122                 begin = pcmp->memory + voice * (pcmp->dma_size / runtime->channels);
 123                 curr = begin + (pcmp->bpos * pcmp->block_size) / runtime->channels;
 124                 end = curr + (pcmp->block_size / runtime->channels);
 125                 end -= snd_pcm_format_width(runtime->format) == 16 ? 2 : 1;
 126                 /*
 127                 snd_printk(KERN_DEBUG "init: curr=0x%x, begin=0x%x, end=0x%x, "
 128                            "ctrl=0x%x, ramp=0x%x, rate=0x%x\n",
 129                            curr, begin, end, voice_ctrl, ramp_ctrl, rate);
 130                 */
 131                 pan = runtime->channels == 2 ? (!voice ? 1 : 14) : 8;
 132                 vol = !voice ? gus->gf1.pcm_volume_level_left : gus->gf1.pcm_volume_level_right;
 133                 spin_lock_irqsave(&gus->reg_lock, flags);
 134                 snd_gf1_select_voice(gus, pcmp->pvoices[voice]->number);
 135                 snd_gf1_write8(gus, SNDRV_GF1_VB_PAN, pan);
 136                 snd_gf1_write16(gus, SNDRV_GF1_VW_FREQUENCY, rate);
 137                 snd_gf1_write_addr(gus, SNDRV_GF1_VA_START, begin << 4, voice_ctrl & 4);
 138                 snd_gf1_write_addr(gus, SNDRV_GF1_VA_END, end << 4, voice_ctrl & 4);
 139                 snd_gf1_write_addr(gus, SNDRV_GF1_VA_CURRENT, curr << 4, voice_ctrl & 4);
 140                 snd_gf1_write16(gus, SNDRV_GF1_VW_VOLUME, SNDRV_GF1_MIN_VOLUME << 4);
 141                 snd_gf1_write8(gus, SNDRV_GF1_VB_VOLUME_RATE, 0x2f);
 142                 snd_gf1_write8(gus, SNDRV_GF1_VB_VOLUME_START, SNDRV_GF1_MIN_OFFSET);
 143                 snd_gf1_write8(gus, SNDRV_GF1_VB_VOLUME_END, vol >> 8);
 144                 snd_gf1_write8(gus, SNDRV_GF1_VB_VOLUME_CONTROL, ramp_ctrl);
 145                 if (!gus->gf1.enh_mode) {
 146                         snd_gf1_delay(gus);
 147                         snd_gf1_write8(gus, SNDRV_GF1_VB_VOLUME_CONTROL, ramp_ctrl);
 148                 }
 149                 spin_unlock_irqrestore(&gus->reg_lock, flags);
 150         }
 151         spin_lock_irqsave(&gus->reg_lock, flags);
 152         for (voice = 0; voice < pcmp->voices; voice++) {
 153                 snd_gf1_select_voice(gus, pcmp->pvoices[voice]->number);
 154                 if (gus->gf1.enh_mode)
 155                         snd_gf1_write8(gus, SNDRV_GF1_VB_MODE, 0x00);   /* deactivate voice */
 156                 snd_gf1_write8(gus, SNDRV_GF1_VB_ADDRESS_CONTROL, voice_ctrl);
 157                 voice_ctrl &= ~0x20;
 158         }
 159         voice_ctrl |= 0x20;
 160         if (!gus->gf1.enh_mode) {
 161                 snd_gf1_delay(gus);
 162                 for (voice = 0; voice < pcmp->voices; voice++) {
 163                         snd_gf1_select_voice(gus, pcmp->pvoices[voice]->number);
 164                         snd_gf1_write8(gus, SNDRV_GF1_VB_ADDRESS_CONTROL, voice_ctrl);
 165                         voice_ctrl &= ~0x20;    /* disable IRQ for next voice */
 166                 }
 167         }
 168         spin_unlock_irqrestore(&gus->reg_lock, flags);
 169 }
 170
 171 static void snd_gf1_pcm_interrupt_wave(struct snd_gus_card * gus,
 172                                        struct snd_gus_voice *pvoice)
 173 {
 174         struct gus_pcm_private * pcmp;
 175         struct snd_pcm_runtime *runtime;
 176         unsigned char voice_ctrl, ramp_ctrl;
 177         unsigned int idx;
 178         unsigned int end, step;
 179
 180         if (!pvoice->private_data) {
 181                 snd_printd("snd_gf1_pcm: unknown wave irq?\n");
 182                 snd_gf1_smart_stop_voice(gus, pvoice->number);
 183                 return;
 184         }
 185         pcmp = pvoice->private_data;
 186         if (pcmp == NULL) {
 187                 snd_printd("snd_gf1_pcm: unknown wave irq?\n");
 188                 snd_gf1_smart_stop_voice(gus, pvoice->number);
 189                 return;
 190         }
 191         gus = pcmp->gus;
 192         runtime = pcmp->substream->runtime;
 193
 194         spin_lock(&gus->reg_lock);
 195         snd_gf1_select_voice(gus, pvoice->number);
 196         voice_ctrl = snd_gf1_read8(gus, SNDRV_GF1_VB_ADDRESS_CONTROL) & ~0x8b;
 197         ramp_ctrl = (snd_gf1_read8(gus, SNDRV_GF1_VB_VOLUME_CONTROL) & ~0xa4) | 0x03;
 198 #if 0
 199         snd_gf1_select_voice(gus, pvoice->number);
 200         printk(KERN_DEBUG "position = 0x%x\n",
 201                (snd_gf1_read_addr(gus, SNDRV_GF1_VA_CURRENT, voice_ctrl & 4) >> 4));
 202         snd_gf1_select_voice(gus, pcmp->pvoices[1]->number);
 203         printk(KERN_DEBUG "position = 0x%x\n",
 204                (snd_gf1_read_addr(gus, SNDRV_GF1_VA_CURRENT, voice_ctrl & 4) >> 4));
 205         snd_gf1_select_voice(gus, pvoice->number);
 206 #endif
 207         pcmp->bpos++;
 208         pcmp->bpos %= pcmp->blocks;
 209         if (pcmp->bpos + 1 >= pcmp->blocks) {   /* last block? */
 210                 voice_ctrl |= 0x08;     /* enable loop */
 211         } else {
 212                 ramp_ctrl |= 0x04;      /* enable rollover */
 213         }
 214         end = pcmp->memory + (((pcmp->bpos + 1) * pcmp->block_size) / runtime->channels);
 215         end -= voice_ctrl & 4 ? 2 : 1;
 216         step = pcmp->dma_size / runtime->channels;
 217         voice_ctrl |= 0x20;
 218         if (!pcmp->final_volume) {
 219                 ramp_ctrl |= 0x20;
 220                 ramp_ctrl &= ~0x03;
 221         }
 222         for (idx = 0; idx < pcmp->voices; idx++, end += step) {
 223                 snd_gf1_select_voice(gus, pcmp->pvoices[idx]->number);
 224                 snd_gf1_write_addr(gus, SNDRV_GF1_VA_END, end << 4, voice_ctrl & 4);
 225                 snd_gf1_write8(gus, SNDRV_GF1_VB_ADDRESS_CONTROL, voice_ctrl);
 226                 snd_gf1_write8(gus, SNDRV_GF1_VB_VOLUME_CONTROL, ramp_ctrl);
 227                 voice_ctrl &= ~0x20;
 228         }
 229         if (!gus->gf1.enh_mode) {
 230                 snd_gf1_delay(gus);
 231                 voice_ctrl |= 0x20;
 232                 for (idx = 0; idx < pcmp->voices; idx++) {
 233                         snd_gf1_select_voice(gus, pcmp->pvoices[idx]->number);
 234                         snd_gf1_write8(gus, SNDRV_GF1_VB_ADDRESS_CONTROL, voice_ctrl);
 235                         snd_gf1_write8(gus, SNDRV_GF1_VB_VOLUME_CONTROL, ramp_ctrl);
 236                         voice_ctrl &= ~0x20;
 237                 }
 238         }
 239         spin_unlock(&gus->reg_lock);
 240
 241         snd_pcm_period_elapsed(pcmp->substream);
 242 #if 0
 243         if ((runtime->flags & SNDRV_PCM_FLG_MMAP) &&
 244             *runtime->state == SNDRV_PCM_STATE_RUNNING) {
 245                 end = pcmp->bpos * pcmp->block_size;
 246                 if (runtime->channels > 1) {
 247                         snd_gf1_pcm_block_change(pcmp->substream, end, pcmp->memory + (end / 2), pcmp->block_size / 2);
 248                         snd_gf1_pcm_block_change(pcmp->substream, end + (pcmp->block_size / 2), pcmp->memory + (pcmp->dma_size / 2) + (end / 2), pcmp->block_size / 2);
 249                 } else {
 250                         snd_gf1_pcm_block_change(pcmp->substream, end, pcmp->memory + end, pcmp->block_size);
 251                 }
 252         }
 253 #endif
 254 }
 255
 256 static void snd_gf1_pcm_interrupt_volume(struct snd_gus_card * gus,
 257                                          struct snd_gus_voice * pvoice)
 258 {
 259         unsigned short vol;
 260         int cvoice;
 261         struct gus_pcm_private *pcmp = pvoice->private_data;
 262
 263         /* stop ramp, but leave rollover bit untouched */
 264         spin_lock(&gus->reg_lock);
 265         snd_gf1_select_voice(gus, pvoice->number);
 266         snd_gf1_ctrl_stop(gus, SNDRV_GF1_VB_VOLUME_CONTROL);
 267         spin_unlock(&gus->reg_lock);
 268         if (pcmp == NULL)
 269                 return;
 270         /* are we active? */
 271         if (!(pcmp->flags & SNDRV_GF1_PCM_PFLG_ACTIVE))
 272                 return;
 273         /* load real volume - better precision */
 274         cvoice = pcmp->pvoices[0] == pvoice ? 0 : 1;
 275         if (pcmp->substream == NULL)
 276                 return;
 277         vol = !cvoice ? gus->gf1.pcm_volume_level_left : gus->gf1.pcm_volume_level_right;
 278         spin_lock(&gus->reg_lock);
 279         snd_gf1_select_voice(gus, pvoice->number);
 280         snd_gf1_write16(gus, SNDRV_GF1_VW_VOLUME, vol);
 281         pcmp->final_volume = 1;
 282         spin_unlock(&gus->reg_lock);
 283 }
 284
 285 static void snd_gf1_pcm_volume_change(struct snd_gus_card * gus)
 286 {
 287 }
 288
 289 static int snd_gf1_pcm_poke_block(struct snd_gus_card *gus, unsigned char *buf,
 290                                   unsigned int pos, unsigned int count,
 291                                   int w16, int invert)
 292 {
 293         unsigned int len;
 294         unsigned long flags;
 295
 296         /*
 297         printk(KERN_DEBUG
 298                "poke block; buf = 0x%x, pos = %i, count = %i, port = 0x%x\n",
 299                (int)buf, pos, count, gus->gf1.port);
 300         */
 301         while (count > 0) {
 302                 len = count;
 303                 if (len > 512)          /* limit, to allow IRQ */
 304                         len = 512;
 305                 count -= len;
 306                 if (gus->interwave) {
 307                         spin_lock_irqsave(&gus->reg_lock, flags);
 308                         snd_gf1_write8(gus, SNDRV_GF1_GB_MEMORY_CONTROL, 0x01 | (invert ? 0x08 : 0x00));
 309                         snd_gf1_dram_addr(gus, pos);
 310                         if (w16) {
 311                                 outb(SNDRV_GF1_GW_DRAM_IO16, GUSP(gus, GF1REGSEL));
 312                                 outsw(GUSP(gus, GF1DATALOW), buf, len >> 1);
 313                         } else {
 314                                 outsb(GUSP(gus, DRAM), buf, len);
 315                         }
 316                         spin_unlock_irqrestore(&gus->reg_lock, flags);
 317                         buf += 512;
 318                         pos += 512;
 319                 } else {
 320                         invert = invert ? 0x80 : 0x00;
 321                         if (w16) {
 322                                 len >>= 1;
 323                                 while (len--) {
 324                                         snd_gf1_poke(gus, pos++, *buf++);
 325                                         snd_gf1_poke(gus, pos++, *buf++ ^ invert);
 326                                 }
 327                         } else {
 328                                 while (len--)
 329                                         snd_gf1_poke(gus, pos++, *buf++ ^ invert);
 330                         }
 331                 }
 332                 if (count > 0 && !in_interrupt()) {
 333                         schedule_timeout_interruptible(1);
 334                         if (signal_pending(current))
 335                                 return -EAGAIN;
 336                 }
 337         }
 338         return 0;
 339 }
 340
 341 static int get_bpos(struct gus_pcm_private *pcmp, int voice, unsigned int pos,
 342                     unsigned int len)
 343 {
 344         unsigned int bpos = pos + (voice * (pcmp->dma_size / 2));
 345         if (snd_BUG_ON(bpos > pcmp->dma_size))
 346                 return -EIO;
 347         if (snd_BUG_ON(bpos + len > pcmp->dma_size))
 348                 return -EIO;
 349         return bpos;
 350 }
 351
 352 static int playback_copy_ack(struct snd_pcm_substream *substream,
 353                              unsigned int bpos, unsigned int len)
 354 {
 355         struct snd_pcm_runtime *runtime = substream->runtime;
 356         struct gus_pcm_private *pcmp = runtime->private_data;
 357         struct snd_gus_card *gus = pcmp->gus;
 358         int w16, invert;
 359
 360         if (len > 32)
 361                 return snd_gf1_pcm_block_change(substream, bpos,
 362                                                 pcmp->memory + bpos, len);
 363
 364         w16 = (snd_pcm_format_width(runtime->format) == 16);
 365         invert = snd_pcm_format_unsigned(runtime->format);
 366         return snd_gf1_pcm_poke_block(gus, runtime->dma_area + bpos,
 367                                       pcmp->memory + bpos, len, w16, invert);
 368 }
 369
 370 static int snd_gf1_pcm_playback_copy(struct snd_pcm_substream *substream,
 371                                      int voice, unsigned long pos,
 372                                      void __user *src, unsigned long count)
 373 {
 374         struct snd_pcm_runtime *runtime = substream->runtime;
 375         struct gus_pcm_private *pcmp = runtime->private_data;
 376         unsigned int len = count;
 377         int bpos;
 378
 379         bpos = get_bpos(pcmp, voice, pos, len);
 380         if (bpos < 0)
 381                 return pos;
 382         if (copy_from_user(runtime->dma_area + bpos, src, len))
 383                 return -EFAULT;
 384         return playback_copy_ack(substream, bpos, len);
 385 }
 386
 387 static int snd_gf1_pcm_playback_copy_kernel(struct snd_pcm_substream *substream,
 388                                             int voice, unsigned long pos,
 389                                             void *src, unsigned long count)
 390 {
 391         struct snd_pcm_runtime *runtime = substream->runtime;
 392         struct gus_pcm_private *pcmp = runtime->private_data;
 393         unsigned int len = count;
 394         int bpos;
 395
 396         bpos = get_bpos(pcmp, voice, pos, len);
 397         if (bpos < 0)
 398                 return pos;
 399         memcpy(runtime->dma_area + bpos, src, len);
 400         return playback_copy_ack(substream, bpos, len);
 401 }
 402
 403 static int snd_gf1_pcm_playback_silence(struct snd_pcm_substream *substream,
 404                                         int voice, unsigned long pos,
 405                                         unsigned long count)
 406 {
 407         struct snd_pcm_runtime *runtime = substream->runtime;
 408         struct gus_pcm_private *pcmp = runtime->private_data;
 409         unsigned int len = count;
 410         int bpos;
 411
 412         bpos = get_bpos(pcmp, voice, pos, len);
 413         if (bpos < 0)
 414                 return pos;
 415         snd_pcm_format_set_silence(runtime->format, runtime->dma_area + bpos,
 416                                    bytes_to_samples(runtime, count));
 417         return playback_copy_ack(substream, bpos, len);
 418 }
 419
 420 static int snd_gf1_pcm_playback_hw_params(struct snd_pcm_substream *substream,
 421                                           struct snd_pcm_hw_params *hw_params)
 422 {
 423         struct snd_gus_card *gus = snd_pcm_substream_chip(substream);
 424         struct snd_pcm_runtime *runtime = substream->runtime;
 425         struct gus_pcm_private *pcmp = runtime->private_data;
 426
 427         if (runtime->buffer_changed) {
 428                 struct snd_gf1_mem_block *block;
 429                 if (pcmp->memory > 0) {
 430                         snd_gf1_mem_free(&gus->gf1.mem_alloc, pcmp->memory);
 431                         pcmp->memory = 0;
 432                 }
 433                 if ((block = snd_gf1_mem_alloc(&gus->gf1.mem_alloc,
 434                                                SNDRV_GF1_MEM_OWNER_DRIVER,
 435                                                "GF1 PCM",
 436                                                runtime->dma_bytes, 1, 32,
 437                                                NULL)) == NULL)
 438                         return -ENOMEM;
 439                 pcmp->memory = block->ptr;
 440         }
 441         pcmp->voices = params_channels(hw_params);
 442         if (pcmp->pvoices[0] == NULL) {
 443                 if ((pcmp->pvoices[0] = snd_gf1_alloc_voice(pcmp->gus, SNDRV_GF1_VOICE_TYPE_PCM, 0, 0)) == NULL)
 444                         return -ENOMEM;
 445                 pcmp->pvoices[0]->handler_wave = snd_gf1_pcm_interrupt_wave;
 446                 pcmp->pvoices[0]->handler_volume = snd_gf1_pcm_interrupt_volume;
 447                 pcmp->pvoices[0]->volume_change = snd_gf1_pcm_volume_change;
 448                 pcmp->pvoices[0]->private_data = pcmp;
 449         }
 450         if (pcmp->voices > 1 && pcmp->pvoices[1] == NULL) {
 451                 if ((pcmp->pvoices[1] = snd_gf1_alloc_voice(pcmp->gus, SNDRV_GF1_VOICE_TYPE_PCM, 0, 0)) == NULL)
 452                         return -ENOMEM;
 453                 pcmp->pvoices[1]->handler_wave = snd_gf1_pcm_interrupt_wave;
 454                 pcmp->pvoices[1]->handler_volume = snd_gf1_pcm_interrupt_volume;
 455                 pcmp->pvoices[1]->volume_change = snd_gf1_pcm_volume_change;
 456                 pcmp->pvoices[1]->private_data = pcmp;
 457         } else if (pcmp->voices == 1) {
 458                 if (pcmp->pvoices[1]) {
 459                         snd_gf1_free_voice(pcmp->gus, pcmp->pvoices[1]);
 460                         pcmp->pvoices[1] = NULL;
 461                 }
 462         }
 463         return 0;
 464 }
 465
 466 static int snd_gf1_pcm_playback_hw_free(struct snd_pcm_substream *substream)
 467 {
 468         struct snd_pcm_runtime *runtime = substream->runtime;
 469         struct gus_pcm_private *pcmp = runtime->private_data;
 470
 471         if (pcmp->pvoices[0]) {
 472                 snd_gf1_free_voice(pcmp->gus, pcmp->pvoices[0]);
 473                 pcmp->pvoices[0] = NULL;
 474         }
 475         if (pcmp->pvoices[1]) {
 476                 snd_gf1_free_voice(pcmp->gus, pcmp->pvoices[1]);
 477                 pcmp->pvoices[1] = NULL;
 478         }
 479         if (pcmp->memory > 0) {
 480                 snd_gf1_mem_free(&pcmp->gus->gf1.mem_alloc, pcmp->memory);
 481                 pcmp->memory = 0;
 482         }
 483         return 0;
 484 }
 485
 486 static int snd_gf1_pcm_playback_prepare(struct snd_pcm_substream *substream)
 487 {
 488         struct snd_pcm_runtime *runtime = substream->runtime;
 489         struct gus_pcm_private *pcmp = runtime->private_data;
 490
 491         pcmp->bpos = 0;
 492         pcmp->dma_size = snd_pcm_lib_buffer_bytes(substream);
 493         pcmp->block_size = snd_pcm_lib_period_bytes(substream);
 494         pcmp->blocks = pcmp->dma_size / pcmp->block_size;
 495         return 0;
 496 }
 497
 498 static int snd_gf1_pcm_playback_trigger(struct snd_pcm_substream *substream,
 499                                         int cmd)
 500 {
 501         struct snd_gus_card *gus = snd_pcm_substream_chip(substream);
 502         struct snd_pcm_runtime *runtime = substream->runtime;
 503         struct gus_pcm_private *pcmp = runtime->private_data;
 504         int voice;
 505
 506         if (cmd == SNDRV_PCM_TRIGGER_START) {
 507                 snd_gf1_pcm_trigger_up(substream);
 508         } else if (cmd == SNDRV_PCM_TRIGGER_STOP) {
 509                 spin_lock(&pcmp->lock);
 510                 pcmp->flags &= ~SNDRV_GF1_PCM_PFLG_ACTIVE;
 511                 spin_unlock(&pcmp->lock);
 512                 voice = pcmp->pvoices[0]->number;
 513                 snd_gf1_stop_voices(gus, voice, voice);
 514                 if (pcmp->pvoices[1]) {
 515                         voice = pcmp->pvoices[1]->number;
 516                         snd_gf1_stop_voices(gus, voice, voice);
 517                 }
 518         } else {
 519                 return -EINVAL;
 520         }
 521         return 0;
 522 }
 523
 524 static snd_pcm_uframes_t snd_gf1_pcm_playback_pointer(struct snd_pcm_substream *substream)
 525 {
 526         struct snd_gus_card *gus = snd_pcm_substream_chip(substream);
 527         struct snd_pcm_runtime *runtime = substream->runtime;
 528         struct gus_pcm_private *pcmp = runtime->private_data;
 529         unsigned int pos;
 530         unsigned char voice_ctrl;
 531
 532         pos = 0;
 533         spin_lock(&gus->reg_lock);
 534         if (pcmp->flags & SNDRV_GF1_PCM_PFLG_ACTIVE) {
 535                 snd_gf1_select_voice(gus, pcmp->pvoices[0]->number);
 536                 voice_ctrl = snd_gf1_read8(gus, SNDRV_GF1_VB_ADDRESS_CONTROL);
 537                 pos = (snd_gf1_read_addr(gus, SNDRV_GF1_VA_CURRENT, voice_ctrl & 4) >> 4) - pcmp->memory;
 538                 if (substream->runtime->channels > 1)
 539                         pos <<= 1;
 540                 pos = bytes_to_frames(runtime, pos);
 541         }
 542         spin_unlock(&gus->reg_lock);
 543         return pos;
 544 }
 545
 546 static const struct snd_ratnum clock = {
 547         .num = 9878400/16,
 548         .den_min = 2,
 549         .den_max = 257,
 550         .den_step = 1,
 551 };
 552
 553 static const struct snd_pcm_hw_constraint_ratnums hw_constraints_clocks  = {
 554         .nrats = 1,
 555         .rats = &clock,
 556 };
 557
 558 static int snd_gf1_pcm_capture_hw_params(struct snd_pcm_substream *substream,
 559                                          struct snd_pcm_hw_params *hw_params)
 560 {
 561         struct snd_gus_card *gus = snd_pcm_substream_chip(substream);
 562
 563         gus->c_dma_size = params_buffer_bytes(hw_params);
 564         gus->c_period_size = params_period_bytes(hw_params);
 565         gus->c_pos = 0;
 566         gus->gf1.pcm_rcntrl_reg = 0x21;         /* IRQ at end, enable & start */
 567         if (params_channels(hw_params) > 1)
 568                 gus->gf1.pcm_rcntrl_reg |= 2;
 569         if (gus->gf1.dma2 > 3)
 570                 gus->gf1.pcm_rcntrl_reg |= 4;
 571         if (snd_pcm_format_unsigned(params_format(hw_params)))
 572                 gus->gf1.pcm_rcntrl_reg |= 0x80;
 573         return 0;
 574 }
 575
 576 static int snd_gf1_pcm_capture_prepare(struct snd_pcm_substream *substream)
 577 {
 578         struct snd_gus_card *gus = snd_pcm_substream_chip(substream);
 579         struct snd_pcm_runtime *runtime = substream->runtime;
 580
 581         snd_gf1_i_write8(gus, SNDRV_GF1_GB_RECORD_RATE, runtime->rate_den - 2);
 582         snd_gf1_i_write8(gus, SNDRV_GF1_GB_REC_DMA_CONTROL, 0); /* disable sampling */
 583         snd_gf1_i_look8(gus, SNDRV_GF1_GB_REC_DMA_CONTROL);     /* Sampling Control Register */
 584         snd_dma_program(gus->gf1.dma2, runtime->dma_addr, gus->c_period_size, DMA_MODE_READ);
 585         return 0;
 586 }
 587
 588 static int snd_gf1_pcm_capture_trigger(struct snd_pcm_substream *substream,
 589                                        int cmd)
 590 {
 591         struct snd_gus_card *gus = snd_pcm_substream_chip(substream);
 592         int val;
 593
 594         if (cmd == SNDRV_PCM_TRIGGER_START) {
 595                 val = gus->gf1.pcm_rcntrl_reg;
 596         } else if (cmd == SNDRV_PCM_TRIGGER_STOP) {
 597                 val = 0;
 598         } else {
 599                 return -EINVAL;
 600         }
 601
 602         spin_lock(&gus->reg_lock);
 603         snd_gf1_write8(gus, SNDRV_GF1_GB_REC_DMA_CONTROL, val);
 604         snd_gf1_look8(gus, SNDRV_GF1_GB_REC_DMA_CONTROL);
 605         spin_unlock(&gus->reg_lock);
 606         return 0;
 607 }
 608
 609 static snd_pcm_uframes_t snd_gf1_pcm_capture_pointer(struct snd_pcm_substream *substream)
 610 {
 611         struct snd_gus_card *gus = snd_pcm_substream_chip(substream);
 612         int pos = snd_dma_pointer(gus->gf1.dma2, gus->c_period_size);
 613         pos = bytes_to_frames(substream->runtime, (gus->c_pos + pos) % gus->c_dma_size);
 614         return pos;
 615 }
 616
 617 static void snd_gf1_pcm_interrupt_dma_read(struct snd_gus_card * gus)
 618 {
 619         snd_gf1_i_write8(gus, SNDRV_GF1_GB_REC_DMA_CONTROL, 0); /* disable sampling */
 620         snd_gf1_i_look8(gus, SNDRV_GF1_GB_REC_DMA_CONTROL);     /* Sampling Control Register */
 621         if (gus->pcm_cap_substream != NULL) {
 622                 snd_gf1_pcm_capture_prepare(gus->pcm_cap_substream);
 623                 snd_gf1_pcm_capture_trigger(gus->pcm_cap_substream, SNDRV_PCM_TRIGGER_START);
 624                 gus->c_pos += gus->c_period_size;
 625                 snd_pcm_period_elapsed(gus->pcm_cap_substream);
 626         }
 627 }
 628
 629 static const struct snd_pcm_hardware snd_gf1_pcm_playback =
 630 {
 631         .info =                 SNDRV_PCM_INFO_NONINTERLEAVED,
 632         .formats                = (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_U8 |
 633                                  SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_U16_LE),
 634         .rates =                SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000,
 635         .rate_min =             5510,
 636         .rate_max =             48000,
 637         .channels_min =         1,
 638         .channels_max =         2,
 639         .buffer_bytes_max =     (128*1024),
 640         .period_bytes_min =     64,
 641         .period_bytes_max =     (128*1024),
 642         .periods_min =          1,
 643         .periods_max =          1024,
 644         .fifo_size =            0,
 645 };
 646
 647 static const struct snd_pcm_hardware snd_gf1_pcm_capture =
 648 {
 649         .info =                 (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
 650                                  SNDRV_PCM_INFO_MMAP_VALID),
 651         .formats =              SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_U8,
 652         .rates =                SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_44100,
 653         .rate_min =             5510,
 654         .rate_max =             44100,
 655         .channels_min =         1,
 656         .channels_max =         2,
 657         .buffer_bytes_max =     (128*1024),
 658         .period_bytes_min =     64,
 659         .period_bytes_max =     (128*1024),
 660         .periods_min =          1,
 661         .periods_max =          1024,
 662         .fifo_size =            0,
 663 };
 664
 665 static void snd_gf1_pcm_playback_free(struct snd_pcm_runtime *runtime)
 666 {
 667         kfree(runtime->private_data);
 668 }
 669
 670 static int snd_gf1_pcm_playback_open(struct snd_pcm_substream *substream)
 671 {
 672         struct gus_pcm_private *pcmp;
 673         struct snd_gus_card *gus = snd_pcm_substream_chip(substream);
 674         struct snd_pcm_runtime *runtime = substream->runtime;
 675         int err;
 676
 677         pcmp = kzalloc(sizeof(*pcmp), GFP_KERNEL);
 678         if (pcmp == NULL)
 679                 return -ENOMEM;
 680         pcmp->gus = gus;
 681         spin_lock_init(&pcmp->lock);
 682         init_waitqueue_head(&pcmp->sleep);
 683         atomic_set(&pcmp->dma_count, 0);
 684
 685         runtime->private_data = pcmp;
 686         runtime->private_free = snd_gf1_pcm_playback_free;
 687
 688 #if 0
 689         printk(KERN_DEBUG "playback.buffer = 0x%lx, gf1.pcm_buffer = 0x%lx\n",
 690                (long) pcm->playback.buffer, (long) gus->gf1.pcm_buffer);
 691 #endif
 692         if ((err = snd_gf1_dma_init(gus)) < 0)
 693                 return err;
 694         pcmp->flags = SNDRV_GF1_PCM_PFLG_NONE;
 695         pcmp->substream = substream;
 696         runtime->hw = snd_gf1_pcm_playback;
 697         snd_pcm_limit_isa_dma_size(gus->gf1.dma1, &runtime->hw.buffer_bytes_max);
 698         snd_pcm_limit_isa_dma_size(gus->gf1.dma1, &runtime->hw.period_bytes_max);
 699         snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 64);
 700         return 0;
 701 }
 702
 703 static int snd_gf1_pcm_playback_close(struct snd_pcm_substream *substream)
 704 {
 705         struct snd_gus_card *gus = snd_pcm_substream_chip(substream);
 706         struct snd_pcm_runtime *runtime = substream->runtime;
 707         struct gus_pcm_private *pcmp = runtime->private_data;
 708
 709         if (!wait_event_timeout(pcmp->sleep, (atomic_read(&pcmp->dma_count) <= 0), 2*HZ))
 710                 snd_printk(KERN_ERR "gf1 pcm - serious DMA problem\n");
 711
 712         snd_gf1_dma_done(gus);
 713         return 0;
 714 }
 715
 716 static int snd_gf1_pcm_capture_open(struct snd_pcm_substream *substream)
 717 {
 718         struct snd_pcm_runtime *runtime = substream->runtime;
 719         struct snd_gus_card *gus = snd_pcm_substream_chip(substream);
 720
 721         gus->gf1.interrupt_handler_dma_read = snd_gf1_pcm_interrupt_dma_read;
 722         gus->pcm_cap_substream = substream;
 723         substream->runtime->hw = snd_gf1_pcm_capture;
 724         snd_pcm_limit_isa_dma_size(gus->gf1.dma2, &runtime->hw.buffer_bytes_max);
 725         snd_pcm_limit_isa_dma_size(gus->gf1.dma2, &runtime->hw.period_bytes_max);
 726         snd_pcm_hw_constraint_ratnums(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
 727                                       &hw_constraints_clocks);
 728         return 0;
 729 }
 730
 731 static int snd_gf1_pcm_capture_close(struct snd_pcm_substream *substream)
 732 {
 733         struct snd_gus_card *gus = snd_pcm_substream_chip(substream);
 734
 735         gus->pcm_cap_substream = NULL;
 736         snd_gf1_set_default_handlers(gus, SNDRV_GF1_HANDLER_DMA_READ);
 737         return 0;
 738 }
 739
 740 static int snd_gf1_pcm_volume_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
 741 {
 742         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 743         uinfo->count = 2;
 744         uinfo->value.integer.min = 0;
 745         uinfo->value.integer.max = 127;
 746         return 0;
 747 }
 748
 749 static int snd_gf1_pcm_volume_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
 750 {
 751         struct snd_gus_card *gus = snd_kcontrol_chip(kcontrol);
 752         unsigned long flags;
 753
 754         spin_lock_irqsave(&gus->pcm_volume_level_lock, flags);
 755         ucontrol->value.integer.value[0] = gus->gf1.pcm_volume_level_left1;
 756         ucontrol->value.integer.value[1] = gus->gf1.pcm_volume_level_right1;
 757         spin_unlock_irqrestore(&gus->pcm_volume_level_lock, flags);
 758         return 0;
 759 }
 760
 761 static int snd_gf1_pcm_volume_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
 762 {
 763         struct snd_gus_card *gus = snd_kcontrol_chip(kcontrol);
 764         unsigned long flags;
 765         int change;
 766         unsigned int idx;
 767         unsigned short val1, val2, vol;
 768         struct gus_pcm_private *pcmp;
 769         struct snd_gus_voice *pvoice;
 770
 771         val1 = ucontrol->value.integer.value[0] & 127;
 772         val2 = ucontrol->value.integer.value[1] & 127;
 773         spin_lock_irqsave(&gus->pcm_volume_level_lock, flags);
 774         change = val1 != gus->gf1.pcm_volume_level_left1 ||
 775                  val2 != gus->gf1.pcm_volume_level_right1;
 776         gus->gf1.pcm_volume_level_left1 = val1;
 777         gus->gf1.pcm_volume_level_right1 = val2;
 778         gus->gf1.pcm_volume_level_left = snd_gf1_lvol_to_gvol_raw(val1 << 9) << 4;
 779         gus->gf1.pcm_volume_level_right = snd_gf1_lvol_to_gvol_raw(val2 << 9) << 4;
 780         spin_unlock_irqrestore(&gus->pcm_volume_level_lock, flags);
 781         /* are we active? */
 782         spin_lock_irqsave(&gus->voice_alloc, flags);
 783         for (idx = 0; idx < 32; idx++) {
 784                 pvoice = &gus->gf1.voices[idx];
 785                 if (!pvoice->pcm)
 786                         continue;
 787                 pcmp = pvoice->private_data;
 788                 if (!(pcmp->flags & SNDRV_GF1_PCM_PFLG_ACTIVE))
 789                         continue;
 790                 /* load real volume - better precision */
 791                 spin_lock(&gus->reg_lock);
 792                 snd_gf1_select_voice(gus, pvoice->number);
 793                 snd_gf1_ctrl_stop(gus, SNDRV_GF1_VB_VOLUME_CONTROL);
 794                 vol = pvoice == pcmp->pvoices[0] ? gus->gf1.pcm_volume_level_left : gus->gf1.pcm_volume_level_right;
 795                 snd_gf1_write16(gus, SNDRV_GF1_VW_VOLUME, vol);
 796                 pcmp->final_volume = 1;
 797                 spin_unlock(&gus->reg_lock);
 798         }
 799         spin_unlock_irqrestore(&gus->voice_alloc, flags);
 800         return change;
 801 }
 802
 803 static const struct snd_kcontrol_new snd_gf1_pcm_volume_control =
 804 {
 805         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 806         .name = "PCM Playback Volume",
 807         .info = snd_gf1_pcm_volume_info,
 808         .get = snd_gf1_pcm_volume_get,
 809         .put = snd_gf1_pcm_volume_put
 810 };
 811
 812 static const struct snd_kcontrol_new snd_gf1_pcm_volume_control1 =
 813 {
 814         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 815         .name = "GPCM Playback Volume",
 816         .info = snd_gf1_pcm_volume_info,
 817         .get = snd_gf1_pcm_volume_get,
 818         .put = snd_gf1_pcm_volume_put
 819 };
 820
 821 static const struct snd_pcm_ops snd_gf1_pcm_playback_ops = {
 822         .open =         snd_gf1_pcm_playback_open,
 823         .close =        snd_gf1_pcm_playback_close,
 824         .hw_params =    snd_gf1_pcm_playback_hw_params,
 825         .hw_free =      snd_gf1_pcm_playback_hw_free,
 826         .prepare =      snd_gf1_pcm_playback_prepare,
 827         .trigger =      snd_gf1_pcm_playback_trigger,
 828         .pointer =      snd_gf1_pcm_playback_pointer,
 829         .copy_user =    snd_gf1_pcm_playback_copy,
 830         .copy_kernel =  snd_gf1_pcm_playback_copy_kernel,
 831         .fill_silence = snd_gf1_pcm_playback_silence,
 832 };
 833
 834 static const struct snd_pcm_ops snd_gf1_pcm_capture_ops = {
 835         .open =         snd_gf1_pcm_capture_open,
 836         .close =        snd_gf1_pcm_capture_close,
 837         .hw_params =    snd_gf1_pcm_capture_hw_params,
 838         .prepare =      snd_gf1_pcm_capture_prepare,
 839         .trigger =      snd_gf1_pcm_capture_trigger,
 840         .pointer =      snd_gf1_pcm_capture_pointer,
 841 };
 842
 843 int snd_gf1_pcm_new(struct snd_gus_card *gus, int pcm_dev, int control_index)
 844 {
 845         struct snd_card *card;
 846         struct snd_kcontrol *kctl;
 847         struct snd_pcm *pcm;
 848         struct snd_pcm_substream *substream;
 849         int capture, err;
 850
 851         card = gus->card;
 852         capture = !gus->interwave && !gus->ess_flag && !gus->ace_flag ? 1 : 0;
 853         err = snd_pcm_new(card,
 854                           gus->interwave ? "AMD InterWave" : "GF1",
 855                           pcm_dev,
 856                           gus->gf1.pcm_channels / 2,
 857                           capture,
 858                           &pcm);
 859         if (err < 0)
 860                 return err;
 861         pcm->private_data = gus;
 862         /* playback setup */
 863         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_gf1_pcm_playback_ops);
 864
 865         for (substream = pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream; substream; substream = substream->next)
 866                 snd_pcm_set_managed_buffer(substream, SNDRV_DMA_TYPE_DEV,
 867                                            card->dev,
 868                                            64*1024, gus->gf1.dma1 > 3 ? 128*1024 : 64*1024);
 869
 870         pcm->info_flags = 0;
 871         pcm->dev_subclass = SNDRV_PCM_SUBCLASS_GENERIC_MIX;
 872         if (capture) {
 873                 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_gf1_pcm_capture_ops);
 874                 if (gus->gf1.dma2 == gus->gf1.dma1)
 875                         pcm->info_flags |= SNDRV_PCM_INFO_HALF_DUPLEX;
 876                 snd_pcm_set_managed_buffer(pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream,
 877                                            SNDRV_DMA_TYPE_DEV, card->dev,
 878                                            64*1024, gus->gf1.dma2 > 3 ? 128*1024 : 64*1024);
 879         }
 880         strcpy(pcm->name, pcm->id);
 881         if (gus->interwave) {
 882                 sprintf(pcm->name + strlen(pcm->name), " rev %c", gus->revision + 'A');
 883         }
 884         strcat(pcm->name, " (synth)");
 885         gus->pcm = pcm;
 886
 887         if (gus->codec_flag)
 888                 kctl = snd_ctl_new1(&snd_gf1_pcm_volume_control1, gus);
 889         else
 890                 kctl = snd_ctl_new1(&snd_gf1_pcm_volume_control, gus);
 891         if ((err = snd_ctl_add(card, kctl)) < 0)
 892                 return err;
 893         kctl->id.index = control_index;
 894
 895         return 0;
 896 }
 897