sound/isa/gus/gus_pcm.c

   1 /*
   2  *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
   3  *  Routines for control of GF1 chip (PCM things)
   4  *
   5  *  InterWave chips supports interleaved DMA, but this feature isn't used in
   6  *  this code.
   7  *
   8  *  This code emulates autoinit DMA transfer for playback, recording by GF1
   9  *  chip doesn't support autoinit DMA.
  10  *
  11  *
  12  *   This program is free software; you can redistribute it and/or modify
  13  *   it under the terms of the GNU General Public License as published by
  14  *   the Free Software Foundation; either version 2 of the License, or
  15  *   (at your option) any later version.
  16  *
  17  *   This program is distributed in the hope that it will be useful,
  18  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  *   GNU General Public License for more details.
  21  *
  22  *   You should have received a copy of the GNU General Public License
  23  *   along with this program; if not, write to the Free Software
  24  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  25  *
  26  */
  27
  28 #include <asm/dma.h>
  29 #include <linux/slab.h>
  30 #include <sound/core.h>
  31 #include <sound/control.h>
  32 #include <sound/gus.h>
  33 #include <sound/pcm_params.h>
  34 #include "gus_tables.h"
  35
  36 /* maximum rate */
  37
  38 #define SNDRV_GF1_PCM_RATE              48000
  39
  40 #define SNDRV_GF1_PCM_PFLG_NONE         0
  41 #define SNDRV_GF1_PCM_PFLG_ACTIVE       (1<<0)
  42 #define SNDRV_GF1_PCM_PFLG_NEUTRAL      (2<<0)
  43
  44 struct gus_pcm_private {
  45         struct snd_gus_card * gus;
  46         struct snd_pcm_substream *substream;
  47         spinlock_t lock;
  48         unsigned int voices;
  49         struct snd_gus_voice *pvoices[2];
  50         unsigned int memory;
  51         unsigned short flags;
  52         unsigned char voice_ctrl, ramp_ctrl;
  53         unsigned int bpos;
  54         unsigned int blocks;
  55         unsigned int block_size;
  56         unsigned int dma_size;
  57         wait_queue_head_t sleep;
  58         atomic_t dma_count;
  59         int final_volume;
  60 };
  61
  62 static int snd_gf1_pcm_use_dma = 1;
  63
  64 static void snd_gf1_pcm_block_change_ack(struct snd_gus_card * gus, void *private_data)
  65 {
  66         struct gus_pcm_private *pcmp = private_data;
  67
  68         if (pcmp) {
  69                 atomic_dec(&pcmp->dma_count);
  70                 wake_up(&pcmp->sleep);
  71         }
  72 }
  73
  74 static int snd_gf1_pcm_block_change(struct snd_pcm_substream *substream,
  75                                     unsigned int offset,
  76                                     unsigned int addr,
  77                                     unsigned int count)
  78 {
  79         struct snd_gf1_dma_block block;
  80         struct snd_pcm_runtime *runtime = substream->runtime;
  81         struct gus_pcm_private *pcmp = runtime->private_data;
  82
  83         count += offset & 31;
  84         offset &= ~31;
  85         // snd_printk("block change - offset = 0x%x, count = 0x%x\n", offset, count);
  86         memset(&block, 0, sizeof(block));
  87         block.cmd = SNDRV_GF1_DMA_IRQ;
  88         if (snd_pcm_format_unsigned(runtime->format))
  89                 block.cmd |= SNDRV_GF1_DMA_UNSIGNED;
  90         if (snd_pcm_format_width(runtime->format) == 16)
  91                 block.cmd |= SNDRV_GF1_DMA_16BIT;
  92         block.addr = addr & ~31;
  93         block.buffer = runtime->dma_area + offset;
  94         block.buf_addr = runtime->dma_addr + offset;
  95         block.count = count;
  96         block.private_data = pcmp;
  97         block.ack = snd_gf1_pcm_block_change_ack;
  98         if (!snd_gf1_dma_transfer_block(pcmp->gus, &block, 0, 0))
  99                 atomic_inc(&pcmp->dma_count);
 100         return 0;
 101 }
 102
 103 static void snd_gf1_pcm_trigger_up(struct snd_pcm_substream *substream)
 104 {
 105         struct snd_pcm_runtime *runtime = substream->runtime;
 106         struct gus_pcm_private *pcmp = runtime->private_data;
 107         struct snd_gus_card * gus = pcmp->gus;
 108         unsigned long flags;
 109         unsigned char voice_ctrl, ramp_ctrl;
 110         unsigned short rate;
 111         unsigned int curr, begin, end;
 112         unsigned short vol;
 113         unsigned char pan;
 114         unsigned int voice;
 115
 116         spin_lock_irqsave(&pcmp->lock, flags);
 117         if (pcmp->flags & SNDRV_GF1_PCM_PFLG_ACTIVE) {
 118                 spin_unlock_irqrestore(&pcmp->lock, flags);
 119                 return;
 120         }
 121         pcmp->flags |= SNDRV_GF1_PCM_PFLG_ACTIVE;
 122         pcmp->final_volume = 0;
 123         spin_unlock_irqrestore(&pcmp->lock, flags);
 124         rate = snd_gf1_translate_freq(gus, runtime->rate << 4);
 125         /* enable WAVE IRQ */
 126         voice_ctrl = snd_pcm_format_width(runtime->format) == 16 ? 0x24 : 0x20;
 127         /* enable RAMP IRQ + rollover */
 128         ramp_ctrl = 0x24;
 129         if (pcmp->blocks == 1) {
 130                 voice_ctrl |= 0x08;     /* loop enable */
 131                 ramp_ctrl &= ~0x04;     /* disable rollover */
 132         }
 133         for (voice = 0; voice < pcmp->voices; voice++) {
 134                 begin = pcmp->memory + voice * (pcmp->dma_size / runtime->channels);
 135                 curr = begin + (pcmp->bpos * pcmp->block_size) / runtime->channels;
 136                 end = curr + (pcmp->block_size / runtime->channels);
 137                 end -= snd_pcm_format_width(runtime->format) == 16 ? 2 : 1;
 138                 // snd_printk("init: curr=0x%x, begin=0x%x, end=0x%x, ctrl=0x%x, ramp=0x%x, rate=0x%x\n", curr, begin, end, voice_ctrl, ramp_ctrl, rate);
 139                 pan = runtime->channels == 2 ? (!voice ? 1 : 14) : 8;
 140                 vol = !voice ? gus->gf1.pcm_volume_level_left : gus->gf1.pcm_volume_level_right;
 141                 spin_lock_irqsave(&gus->reg_lock, flags);
 142                 snd_gf1_select_voice(gus, pcmp->pvoices[voice]->number);
 143                 snd_gf1_write8(gus, SNDRV_GF1_VB_PAN, pan);
 144                 snd_gf1_write16(gus, SNDRV_GF1_VW_FREQUENCY, rate);
 145                 snd_gf1_write_addr(gus, SNDRV_GF1_VA_START, begin << 4, voice_ctrl & 4);
 146                 snd_gf1_write_addr(gus, SNDRV_GF1_VA_END, end << 4, voice_ctrl & 4);
 147                 snd_gf1_write_addr(gus, SNDRV_GF1_VA_CURRENT, curr << 4, voice_ctrl & 4);
 148                 snd_gf1_write16(gus, SNDRV_GF1_VW_VOLUME, SNDRV_GF1_MIN_VOLUME << 4);
 149                 snd_gf1_write8(gus, SNDRV_GF1_VB_VOLUME_RATE, 0x2f);
 150                 snd_gf1_write8(gus, SNDRV_GF1_VB_VOLUME_START, SNDRV_GF1_MIN_OFFSET);
 151                 snd_gf1_write8(gus, SNDRV_GF1_VB_VOLUME_END, vol >> 8);
 152                 snd_gf1_write8(gus, SNDRV_GF1_VB_VOLUME_CONTROL, ramp_ctrl);
 153                 if (!gus->gf1.enh_mode) {
 154                         snd_gf1_delay(gus);
 155                         snd_gf1_write8(gus, SNDRV_GF1_VB_VOLUME_CONTROL, ramp_ctrl);
 156                 }
 157                 spin_unlock_irqrestore(&gus->reg_lock, flags);
 158         }
 159         spin_lock_irqsave(&gus->reg_lock, flags);
 160         for (voice = 0; voice < pcmp->voices; voice++) {
 161                 snd_gf1_select_voice(gus, pcmp->pvoices[voice]->number);
 162                 if (gus->gf1.enh_mode)
 163                         snd_gf1_write8(gus, SNDRV_GF1_VB_MODE, 0x00);   /* deactivate voice */
 164                 snd_gf1_write8(gus, SNDRV_GF1_VB_ADDRESS_CONTROL, voice_ctrl);
 165                 voice_ctrl &= ~0x20;
 166         }
 167         voice_ctrl |= 0x20;
 168         if (!gus->gf1.enh_mode) {
 169                 snd_gf1_delay(gus);
 170                 for (voice = 0; voice < pcmp->voices; voice++) {
 171                         snd_gf1_select_voice(gus, pcmp->pvoices[voice]->number);
 172                         snd_gf1_write8(gus, SNDRV_GF1_VB_ADDRESS_CONTROL, voice_ctrl);
 173                         voice_ctrl &= ~0x20;    /* disable IRQ for next voice */
 174                 }
 175         }
 176         spin_unlock_irqrestore(&gus->reg_lock, flags);
 177 }
 178
 179 static void snd_gf1_pcm_interrupt_wave(struct snd_gus_card * gus,
 180                                        struct snd_gus_voice *pvoice)
 181 {
 182         struct gus_pcm_private * pcmp;
 183         struct snd_pcm_runtime *runtime;
 184         unsigned char voice_ctrl, ramp_ctrl;
 185         unsigned int idx;
 186         unsigned int end, step;
 187
 188         if (!pvoice->private_data) {
 189                 snd_printd("snd_gf1_pcm: unknown wave irq?\n");
 190                 snd_gf1_smart_stop_voice(gus, pvoice->number);
 191                 return;
 192         }
 193         pcmp = pvoice->private_data;
 194         if (pcmp == NULL) {
 195                 snd_printd("snd_gf1_pcm: unknown wave irq?\n");
 196                 snd_gf1_smart_stop_voice(gus, pvoice->number);
 197                 return;
 198         }
 199         gus = pcmp->gus;
 200         runtime = pcmp->substream->runtime;
 201
 202         spin_lock(&gus->reg_lock);
 203         snd_gf1_select_voice(gus, pvoice->number);
 204         voice_ctrl = snd_gf1_read8(gus, SNDRV_GF1_VB_ADDRESS_CONTROL) & ~0x8b;
 205         ramp_ctrl = (snd_gf1_read8(gus, SNDRV_GF1_VB_VOLUME_CONTROL) & ~0xa4) | 0x03;
 206 #if 0
 207         snd_gf1_select_voice(gus, pvoice->number);
 208         printk("position = 0x%x\n", (snd_gf1_read_addr(gus, SNDRV_GF1_VA_CURRENT, voice_ctrl & 4) >> 4));
 209         snd_gf1_select_voice(gus, pcmp->pvoices[1]->number);
 210         printk("position = 0x%x\n", (snd_gf1_read_addr(gus, SNDRV_GF1_VA_CURRENT, voice_ctrl & 4) >> 4));
 211         snd_gf1_select_voice(gus, pvoice->number);
 212 #endif
 213         pcmp->bpos++;
 214         pcmp->bpos %= pcmp->blocks;
 215         if (pcmp->bpos + 1 >= pcmp->blocks) {   /* last block? */
 216                 voice_ctrl |= 0x08;     /* enable loop */
 217         } else {
 218                 ramp_ctrl |= 0x04;      /* enable rollover */
 219         }
 220         end = pcmp->memory + (((pcmp->bpos + 1) * pcmp->block_size) / runtime->channels);
 221         end -= voice_ctrl & 4 ? 2 : 1;
 222         step = pcmp->dma_size / runtime->channels;
 223         voice_ctrl |= 0x20;
 224         if (!pcmp->final_volume) {
 225                 ramp_ctrl |= 0x20;
 226                 ramp_ctrl &= ~0x03;
 227         }
 228         for (idx = 0; idx < pcmp->voices; idx++, end += step) {
 229                 snd_gf1_select_voice(gus, pcmp->pvoices[idx]->number);
 230                 snd_gf1_write_addr(gus, SNDRV_GF1_VA_END, end << 4, voice_ctrl & 4);
 231                 snd_gf1_write8(gus, SNDRV_GF1_VB_ADDRESS_CONTROL, voice_ctrl);
 232                 snd_gf1_write8(gus, SNDRV_GF1_VB_VOLUME_CONTROL, ramp_ctrl);
 233                 voice_ctrl &= ~0x20;
 234         }
 235         if (!gus->gf1.enh_mode) {
 236                 snd_gf1_delay(gus);
 237                 voice_ctrl |= 0x20;
 238                 for (idx = 0; idx < pcmp->voices; idx++) {
 239                         snd_gf1_select_voice(gus, pcmp->pvoices[idx]->number);
 240                         snd_gf1_write8(gus, SNDRV_GF1_VB_ADDRESS_CONTROL, voice_ctrl);
 241                         snd_gf1_write8(gus, SNDRV_GF1_VB_VOLUME_CONTROL, ramp_ctrl);
 242                         voice_ctrl &= ~0x20;
 243                 }
 244         }
 245         spin_unlock(&gus->reg_lock);
 246
 247         snd_pcm_period_elapsed(pcmp->substream);
 248 #if 0
 249         if ((runtime->flags & SNDRV_PCM_FLG_MMAP) &&
 250             *runtime->state == SNDRV_PCM_STATE_RUNNING) {
 251                 end = pcmp->bpos * pcmp->block_size;
 252                 if (runtime->channels > 1) {
 253                         snd_gf1_pcm_block_change(pcmp->substream, end, pcmp->memory + (end / 2), pcmp->block_size / 2);
 254                         snd_gf1_pcm_block_change(pcmp->substream, end + (pcmp->block_size / 2), pcmp->memory + (pcmp->dma_size / 2) + (end / 2), pcmp->block_size / 2);
 255                 } else {
 256                         snd_gf1_pcm_block_change(pcmp->substream, end, pcmp->memory + end, pcmp->block_size);
 257                 }
 258         }
 259 #endif
 260 }
 261
 262 static void snd_gf1_pcm_interrupt_volume(struct snd_gus_card * gus,
 263                                          struct snd_gus_voice * pvoice)
 264 {
 265         unsigned short vol;
 266         int cvoice;
 267         struct gus_pcm_private *pcmp = pvoice->private_data;
 268
 269         /* stop ramp, but leave rollover bit untouched */
 270         spin_lock(&gus->reg_lock);
 271         snd_gf1_select_voice(gus, pvoice->number);
 272         snd_gf1_ctrl_stop(gus, SNDRV_GF1_VB_VOLUME_CONTROL);
 273         spin_unlock(&gus->reg_lock);
 274         if (pcmp == NULL)
 275                 return;
 276         /* are we active? */
 277         if (!(pcmp->flags & SNDRV_GF1_PCM_PFLG_ACTIVE))
 278                 return;
 279         /* load real volume - better precision */
 280         cvoice = pcmp->pvoices[0] == pvoice ? 0 : 1;
 281         if (pcmp->substream == NULL)
 282                 return;
 283         vol = !cvoice ? gus->gf1.pcm_volume_level_left : gus->gf1.pcm_volume_level_right;
 284         spin_lock(&gus->reg_lock);
 285         snd_gf1_select_voice(gus, pvoice->number);
 286         snd_gf1_write16(gus, SNDRV_GF1_VW_VOLUME, vol);
 287         pcmp->final_volume = 1;
 288         spin_unlock(&gus->reg_lock);
 289 }
 290
 291 static void snd_gf1_pcm_volume_change(struct snd_gus_card * gus)
 292 {
 293 }
 294
 295 static int snd_gf1_pcm_poke_block(struct snd_gus_card *gus, unsigned char *buf,
 296                                   unsigned int pos, unsigned int count,
 297                                   int w16, int invert)
 298 {
 299         unsigned int len;
 300         unsigned long flags;
 301
 302         // printk("poke block; buf = 0x%x, pos = %i, count = %i, port = 0x%x\n", (int)buf, pos, count, gus->gf1.port);
 303         while (count > 0) {
 304                 len = count;
 305                 if (len > 512)          /* limit, to allow IRQ */
 306                         len = 512;
 307                 count -= len;
 308                 if (gus->interwave) {
 309                         spin_lock_irqsave(&gus->reg_lock, flags);
 310                         snd_gf1_write8(gus, SNDRV_GF1_GB_MEMORY_CONTROL, 0x01 | (invert ? 0x08 : 0x00));
 311                         snd_gf1_dram_addr(gus, pos);
 312                         if (w16) {
 313                                 outb(SNDRV_GF1_GW_DRAM_IO16, GUSP(gus, GF1REGSEL));
 314                                 outsw(GUSP(gus, GF1DATALOW), buf, len >> 1);
 315                         } else {
 316                                 outsb(GUSP(gus, DRAM), buf, len);
 317                         }
 318                         spin_unlock_irqrestore(&gus->reg_lock, flags);
 319                         buf += 512;
 320                         pos += 512;
 321                 } else {
 322                         invert = invert ? 0x80 : 0x00;
 323                         if (w16) {
 324                                 len >>= 1;
 325                                 while (len--) {
 326                                         snd_gf1_poke(gus, pos++, *buf++);
 327                                         snd_gf1_poke(gus, pos++, *buf++ ^ invert);
 328                                 }
 329                         } else {
 330                                 while (len--)
 331                                         snd_gf1_poke(gus, pos++, *buf++ ^ invert);
 332                         }
 333                 }
 334                 if (count > 0 && !in_interrupt()) {
 335                         schedule_timeout_interruptible(1);
 336                         if (signal_pending(current))
 337                                 return -EAGAIN;
 338                 }
 339         }
 340         return 0;
 341 }
 342
 343 static int snd_gf1_pcm_playback_copy(struct snd_pcm_substream *substream,
 344                                      int voice,
 345                                      snd_pcm_uframes_t pos,
 346                                      void __user *src,
 347                                      snd_pcm_uframes_t count)
 348 {
 349         struct snd_pcm_runtime *runtime = substream->runtime;
 350         struct gus_pcm_private *pcmp = runtime->private_data;
 351         unsigned int bpos, len;
 352
 353         bpos = samples_to_bytes(runtime, pos) + (voice * (pcmp->dma_size / 2));
 354         len = samples_to_bytes(runtime, count);
 355         if (snd_BUG_ON(bpos > pcmp->dma_size))
 356                 return -EIO;
 357         if (snd_BUG_ON(bpos + len > pcmp->dma_size))
 358                 return -EIO;
 359         if (copy_from_user(runtime->dma_area + bpos, src, len))
 360                 return -EFAULT;
 361         if (snd_gf1_pcm_use_dma && len > 32) {
 362                 return snd_gf1_pcm_block_change(substream, bpos, pcmp->memory + bpos, len);
 363         } else {
 364                 struct snd_gus_card *gus = pcmp->gus;
 365                 int err, w16, invert;
 366
 367                 w16 = (snd_pcm_format_width(runtime->format) == 16);
 368                 invert = snd_pcm_format_unsigned(runtime->format);
 369                 if ((err = snd_gf1_pcm_poke_block(gus, runtime->dma_area + bpos, pcmp->memory + bpos, len, w16, invert)) < 0)
 370                         return err;
 371         }
 372         return 0;
 373 }
 374
 375 static int snd_gf1_pcm_playback_silence(struct snd_pcm_substream *substream,
 376                                         int voice,
 377                                         snd_pcm_uframes_t pos,
 378                                         snd_pcm_uframes_t count)
 379 {
 380         struct snd_pcm_runtime *runtime = substream->runtime;
 381         struct gus_pcm_private *pcmp = runtime->private_data;
 382         unsigned int bpos, len;
 383
 384         bpos = samples_to_bytes(runtime, pos) + (voice * (pcmp->dma_size / 2));
 385         len = samples_to_bytes(runtime, count);
 386         if (snd_BUG_ON(bpos > pcmp->dma_size))
 387                 return -EIO;
 388         if (snd_BUG_ON(bpos + len > pcmp->dma_size))
 389                 return -EIO;
 390         snd_pcm_format_set_silence(runtime->format, runtime->dma_area + bpos, count);
 391         if (snd_gf1_pcm_use_dma && len > 32) {
 392                 return snd_gf1_pcm_block_change(substream, bpos, pcmp->memory + bpos, len);
 393         } else {
 394                 struct snd_gus_card *gus = pcmp->gus;
 395                 int err, w16, invert;
 396
 397                 w16 = (snd_pcm_format_width(runtime->format) == 16);
 398                 invert = snd_pcm_format_unsigned(runtime->format);
 399                 if ((err = snd_gf1_pcm_poke_block(gus, runtime->dma_area + bpos, pcmp->memory + bpos, len, w16, invert)) < 0)
 400                         return err;
 401         }
 402         return 0;
 403 }
 404
 405 static int snd_gf1_pcm_playback_hw_params(struct snd_pcm_substream *substream,
 406                                           struct snd_pcm_hw_params *hw_params)
 407 {
 408         struct snd_gus_card *gus = snd_pcm_substream_chip(substream);
 409         struct snd_pcm_runtime *runtime = substream->runtime;
 410         struct gus_pcm_private *pcmp = runtime->private_data;
 411         int err;
 412
 413         if ((err = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params))) < 0)
 414                 return err;
 415         if (err > 0) {  /* change */
 416                 struct snd_gf1_mem_block *block;
 417                 if (pcmp->memory > 0) {
 418                         snd_gf1_mem_free(&gus->gf1.mem_alloc, pcmp->memory);
 419                         pcmp->memory = 0;
 420                 }
 421                 if ((block = snd_gf1_mem_alloc(&gus->gf1.mem_alloc,
 422                                                SNDRV_GF1_MEM_OWNER_DRIVER,
 423                                                "GF1 PCM",
 424                                                runtime->dma_bytes, 1, 32,
 425                                                NULL)) == NULL)
 426                         return -ENOMEM;
 427                 pcmp->memory = block->ptr;
 428         }
 429         pcmp->voices = params_channels(hw_params);
 430         if (pcmp->pvoices[0] == NULL) {
 431                 if ((pcmp->pvoices[0] = snd_gf1_alloc_voice(pcmp->gus, SNDRV_GF1_VOICE_TYPE_PCM, 0, 0)) == NULL)
 432                         return -ENOMEM;
 433                 pcmp->pvoices[0]->handler_wave = snd_gf1_pcm_interrupt_wave;
 434                 pcmp->pvoices[0]->handler_volume = snd_gf1_pcm_interrupt_volume;
 435                 pcmp->pvoices[0]->volume_change = snd_gf1_pcm_volume_change;
 436                 pcmp->pvoices[0]->private_data = pcmp;
 437         }
 438         if (pcmp->voices > 1 && pcmp->pvoices[1] == NULL) {
 439                 if ((pcmp->pvoices[1] = snd_gf1_alloc_voice(pcmp->gus, SNDRV_GF1_VOICE_TYPE_PCM, 0, 0)) == NULL)
 440                         return -ENOMEM;
 441                 pcmp->pvoices[1]->handler_wave = snd_gf1_pcm_interrupt_wave;
 442                 pcmp->pvoices[1]->handler_volume = snd_gf1_pcm_interrupt_volume;
 443                 pcmp->pvoices[1]->volume_change = snd_gf1_pcm_volume_change;
 444                 pcmp->pvoices[1]->private_data = pcmp;
 445         } else if (pcmp->voices == 1) {
 446                 if (pcmp->pvoices[1]) {
 447                         snd_gf1_free_voice(pcmp->gus, pcmp->pvoices[1]);
 448                         pcmp->pvoices[1] = NULL;
 449                 }
 450         }
 451         return 0;
 452 }
 453
 454 static int snd_gf1_pcm_playback_hw_free(struct snd_pcm_substream *substream)
 455 {
 456         struct snd_pcm_runtime *runtime = substream->runtime;
 457         struct gus_pcm_private *pcmp = runtime->private_data;
 458
 459         snd_pcm_lib_free_pages(substream);
 460         if (pcmp->pvoices[0]) {
 461                 snd_gf1_free_voice(pcmp->gus, pcmp->pvoices[0]);
 462                 pcmp->pvoices[0] = NULL;
 463         }
 464         if (pcmp->pvoices[1]) {
 465                 snd_gf1_free_voice(pcmp->gus, pcmp->pvoices[1]);
 466                 pcmp->pvoices[1] = NULL;
 467         }
 468         if (pcmp->memory > 0) {
 469                 snd_gf1_mem_free(&pcmp->gus->gf1.mem_alloc, pcmp->memory);
 470                 pcmp->memory = 0;
 471         }
 472         return 0;
 473 }
 474
 475 static int snd_gf1_pcm_playback_prepare(struct snd_pcm_substream *substream)
 476 {
 477         struct snd_pcm_runtime *runtime = substream->runtime;
 478         struct gus_pcm_private *pcmp = runtime->private_data;
 479
 480         pcmp->bpos = 0;
 481         pcmp->dma_size = snd_pcm_lib_buffer_bytes(substream);
 482         pcmp->block_size = snd_pcm_lib_period_bytes(substream);
 483         pcmp->blocks = pcmp->dma_size / pcmp->block_size;
 484         return 0;
 485 }
 486
 487 static int snd_gf1_pcm_playback_trigger(struct snd_pcm_substream *substream,
 488                                         int cmd)
 489 {
 490         struct snd_gus_card *gus = snd_pcm_substream_chip(substream);
 491         struct snd_pcm_runtime *runtime = substream->runtime;
 492         struct gus_pcm_private *pcmp = runtime->private_data;
 493         int voice;
 494
 495         if (cmd == SNDRV_PCM_TRIGGER_START) {
 496                 snd_gf1_pcm_trigger_up(substream);
 497         } else if (cmd == SNDRV_PCM_TRIGGER_STOP) {
 498                 spin_lock(&pcmp->lock);
 499                 pcmp->flags &= ~SNDRV_GF1_PCM_PFLG_ACTIVE;
 500                 spin_unlock(&pcmp->lock);
 501                 voice = pcmp->pvoices[0]->number;
 502                 snd_gf1_stop_voices(gus, voice, voice);
 503                 if (pcmp->pvoices[1]) {
 504                         voice = pcmp->pvoices[1]->number;
 505                         snd_gf1_stop_voices(gus, voice, voice);
 506                 }
 507         } else {
 508                 return -EINVAL;
 509         }
 510         return 0;
 511 }
 512
 513 static snd_pcm_uframes_t snd_gf1_pcm_playback_pointer(struct snd_pcm_substream *substream)
 514 {
 515         struct snd_gus_card *gus = snd_pcm_substream_chip(substream);
 516         struct snd_pcm_runtime *runtime = substream->runtime;
 517         struct gus_pcm_private *pcmp = runtime->private_data;
 518         unsigned int pos;
 519         unsigned char voice_ctrl;
 520
 521         pos = 0;
 522         spin_lock(&gus->reg_lock);
 523         if (pcmp->flags & SNDRV_GF1_PCM_PFLG_ACTIVE) {
 524                 snd_gf1_select_voice(gus, pcmp->pvoices[0]->number);
 525                 voice_ctrl = snd_gf1_read8(gus, SNDRV_GF1_VB_ADDRESS_CONTROL);
 526                 pos = (snd_gf1_read_addr(gus, SNDRV_GF1_VA_CURRENT, voice_ctrl & 4) >> 4) - pcmp->memory;
 527                 if (substream->runtime->channels > 1)
 528                         pos <<= 1;
 529                 pos = bytes_to_frames(runtime, pos);
 530         }
 531         spin_unlock(&gus->reg_lock);
 532         return pos;
 533 }
 534
 535 static struct snd_ratnum clock = {
 536         .num = 9878400/16,
 537         .den_min = 2,
 538         .den_max = 257,
 539         .den_step = 1,
 540 };
 541
 542 static struct snd_pcm_hw_constraint_ratnums hw_constraints_clocks  = {
 543         .nrats = 1,
 544         .rats = &clock,
 545 };
 546
 547 static int snd_gf1_pcm_capture_hw_params(struct snd_pcm_substream *substream,
 548                                          struct snd_pcm_hw_params *hw_params)
 549 {
 550         struct snd_gus_card *gus = snd_pcm_substream_chip(substream);
 551
 552         gus->c_dma_size = params_buffer_bytes(hw_params);
 553         gus->c_period_size = params_period_bytes(hw_params);
 554         gus->c_pos = 0;
 555         gus->gf1.pcm_rcntrl_reg = 0x21;         /* IRQ at end, enable & start */
 556         if (params_channels(hw_params) > 1)
 557                 gus->gf1.pcm_rcntrl_reg |= 2;
 558         if (gus->gf1.dma2 > 3)
 559                 gus->gf1.pcm_rcntrl_reg |= 4;
 560         if (snd_pcm_format_unsigned(params_format(hw_params)))
 561                 gus->gf1.pcm_rcntrl_reg |= 0x80;
 562         return snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params));
 563 }
 564
 565 static int snd_gf1_pcm_capture_hw_free(struct snd_pcm_substream *substream)
 566 {
 567         return snd_pcm_lib_free_pages(substream);
 568 }
 569
 570 static int snd_gf1_pcm_capture_prepare(struct snd_pcm_substream *substream)
 571 {
 572         struct snd_gus_card *gus = snd_pcm_substream_chip(substream);
 573         struct snd_pcm_runtime *runtime = substream->runtime;
 574
 575         snd_gf1_i_write8(gus, SNDRV_GF1_GB_RECORD_RATE, runtime->rate_den - 2);
 576         snd_gf1_i_write8(gus, SNDRV_GF1_GB_REC_DMA_CONTROL, 0); /* disable sampling */
 577         snd_gf1_i_look8(gus, SNDRV_GF1_GB_REC_DMA_CONTROL);     /* Sampling Control Register */
 578         snd_dma_program(gus->gf1.dma2, runtime->dma_addr, gus->c_period_size, DMA_MODE_READ);
 579         return 0;
 580 }
 581
 582 static int snd_gf1_pcm_capture_trigger(struct snd_pcm_substream *substream,
 583                                        int cmd)
 584 {
 585         struct snd_gus_card *gus = snd_pcm_substream_chip(substream);
 586         int val;
 587
 588         if (cmd == SNDRV_PCM_TRIGGER_START) {
 589                 val = gus->gf1.pcm_rcntrl_reg;
 590         } else if (cmd == SNDRV_PCM_TRIGGER_STOP) {
 591                 val = 0;
 592         } else {
 593                 return -EINVAL;
 594         }
 595
 596         spin_lock(&gus->reg_lock);
 597         snd_gf1_write8(gus, SNDRV_GF1_GB_REC_DMA_CONTROL, val);
 598         snd_gf1_look8(gus, SNDRV_GF1_GB_REC_DMA_CONTROL);
 599         spin_unlock(&gus->reg_lock);
 600         return 0;
 601 }
 602
 603 static snd_pcm_uframes_t snd_gf1_pcm_capture_pointer(struct snd_pcm_substream *substream)
 604 {
 605         struct snd_gus_card *gus = snd_pcm_substream_chip(substream);
 606         int pos = snd_dma_pointer(gus->gf1.dma2, gus->c_period_size);
 607         pos = bytes_to_frames(substream->runtime, (gus->c_pos + pos) % gus->c_dma_size);
 608         return pos;
 609 }
 610
 611 static void snd_gf1_pcm_interrupt_dma_read(struct snd_gus_card * gus)
 612 {
 613         snd_gf1_i_write8(gus, SNDRV_GF1_GB_REC_DMA_CONTROL, 0); /* disable sampling */
 614         snd_gf1_i_look8(gus, SNDRV_GF1_GB_REC_DMA_CONTROL);     /* Sampling Control Register */
 615         if (gus->pcm_cap_substream != NULL) {
 616                 snd_gf1_pcm_capture_prepare(gus->pcm_cap_substream);
 617                 snd_gf1_pcm_capture_trigger(gus->pcm_cap_substream, SNDRV_PCM_TRIGGER_START);
 618                 gus->c_pos += gus->c_period_size;
 619                 snd_pcm_period_elapsed(gus->pcm_cap_substream);
 620         }
 621 }
 622
 623 static struct snd_pcm_hardware snd_gf1_pcm_playback =
 624 {
 625         .info =                 SNDRV_PCM_INFO_NONINTERLEAVED,
 626         .formats                = (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_U8 |
 627                                  SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_U16_LE),
 628         .rates =                SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000,
 629         .rate_min =             5510,
 630         .rate_max =             48000,
 631         .channels_min =         1,
 632         .channels_max =         2,
 633         .buffer_bytes_max =     (128*1024),
 634         .period_bytes_min =     64,
 635         .period_bytes_max =     (128*1024),
 636         .periods_min =          1,
 637         .periods_max =          1024,
 638         .fifo_size =            0,
 639 };
 640
 641 static struct snd_pcm_hardware snd_gf1_pcm_capture =
 642 {
 643         .info =                 (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
 644                                  SNDRV_PCM_INFO_MMAP_VALID),
 645         .formats =              SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_U8,
 646         .rates =                SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_44100,
 647         .rate_min =             5510,
 648         .rate_max =             44100,
 649         .channels_min =         1,
 650         .channels_max =         2,
 651         .buffer_bytes_max =     (128*1024),
 652         .period_bytes_min =     64,
 653         .period_bytes_max =     (128*1024),
 654         .periods_min =          1,
 655         .periods_max =          1024,
 656         .fifo_size =            0,
 657 };
 658
 659 static void snd_gf1_pcm_playback_free(struct snd_pcm_runtime *runtime)
 660 {
 661         kfree(runtime->private_data);
 662 }
 663
 664 static int snd_gf1_pcm_playback_open(struct snd_pcm_substream *substream)
 665 {
 666         struct gus_pcm_private *pcmp;
 667         struct snd_gus_card *gus = snd_pcm_substream_chip(substream);
 668         struct snd_pcm_runtime *runtime = substream->runtime;
 669         int err;
 670
 671         pcmp = kzalloc(sizeof(*pcmp), GFP_KERNEL);
 672         if (pcmp == NULL)
 673                 return -ENOMEM;
 674         pcmp->gus = gus;
 675         spin_lock_init(&pcmp->lock);
 676         init_waitqueue_head(&pcmp->sleep);
 677         atomic_set(&pcmp->dma_count, 0);
 678
 679         runtime->private_data = pcmp;
 680         runtime->private_free = snd_gf1_pcm_playback_free;
 681
 682 #if 0
 683         printk("playback.buffer = 0x%lx, gf1.pcm_buffer = 0x%lx\n", (long) pcm->playback.buffer, (long) gus->gf1.pcm_buffer);
 684 #endif
 685         if ((err = snd_gf1_dma_init(gus)) < 0)
 686                 return err;
 687         pcmp->flags = SNDRV_GF1_PCM_PFLG_NONE;
 688         pcmp->substream = substream;
 689         runtime->hw = snd_gf1_pcm_playback;
 690         snd_pcm_limit_isa_dma_size(gus->gf1.dma1, &runtime->hw.buffer_bytes_max);
 691         snd_pcm_limit_isa_dma_size(gus->gf1.dma1, &runtime->hw.period_bytes_max);
 692         snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 64);
 693         return 0;
 694 }
 695
 696 static int snd_gf1_pcm_playback_close(struct snd_pcm_substream *substream)
 697 {
 698         struct snd_gus_card *gus = snd_pcm_substream_chip(substream);
 699         struct snd_pcm_runtime *runtime = substream->runtime;
 700         struct gus_pcm_private *pcmp = runtime->private_data;
 701
 702         if (!wait_event_timeout(pcmp->sleep, (atomic_read(&pcmp->dma_count) <= 0), 2*HZ))
 703                 snd_printk(KERN_ERR "gf1 pcm - serious DMA problem\n");
 704
 705         snd_gf1_dma_done(gus);
 706         return 0;
 707 }
 708
 709 static int snd_gf1_pcm_capture_open(struct snd_pcm_substream *substream)
 710 {
 711         struct snd_pcm_runtime *runtime = substream->runtime;
 712         struct snd_gus_card *gus = snd_pcm_substream_chip(substream);
 713
 714         gus->gf1.interrupt_handler_dma_read = snd_gf1_pcm_interrupt_dma_read;
 715         gus->pcm_cap_substream = substream;
 716         substream->runtime->hw = snd_gf1_pcm_capture;
 717         snd_pcm_limit_isa_dma_size(gus->gf1.dma2, &runtime->hw.buffer_bytes_max);
 718         snd_pcm_limit_isa_dma_size(gus->gf1.dma2, &runtime->hw.period_bytes_max);
 719         snd_pcm_hw_constraint_ratnums(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
 720                                       &hw_constraints_clocks);
 721         return 0;
 722 }
 723
 724 static int snd_gf1_pcm_capture_close(struct snd_pcm_substream *substream)
 725 {
 726         struct snd_gus_card *gus = snd_pcm_substream_chip(substream);
 727
 728         gus->pcm_cap_substream = NULL;
 729         snd_gf1_set_default_handlers(gus, SNDRV_GF1_HANDLER_DMA_READ);
 730         return 0;
 731 }
 732
 733 static int snd_gf1_pcm_volume_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
 734 {
 735         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 736         uinfo->count = 2;
 737         uinfo->value.integer.min = 0;
 738         uinfo->value.integer.max = 127;
 739         return 0;
 740 }
 741
 742 static int snd_gf1_pcm_volume_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
 743 {
 744         struct snd_gus_card *gus = snd_kcontrol_chip(kcontrol);
 745         unsigned long flags;
 746
 747         spin_lock_irqsave(&gus->pcm_volume_level_lock, flags);
 748         ucontrol->value.integer.value[0] = gus->gf1.pcm_volume_level_left1;
 749         ucontrol->value.integer.value[1] = gus->gf1.pcm_volume_level_right1;
 750         spin_unlock_irqrestore(&gus->pcm_volume_level_lock, flags);
 751         return 0;
 752 }
 753
 754 static int snd_gf1_pcm_volume_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
 755 {
 756         struct snd_gus_card *gus = snd_kcontrol_chip(kcontrol);
 757         unsigned long flags;
 758         int change;
 759         unsigned int idx;
 760         unsigned short val1, val2, vol;
 761         struct gus_pcm_private *pcmp;
 762         struct snd_gus_voice *pvoice;
 763
 764         val1 = ucontrol->value.integer.value[0] & 127;
 765         val2 = ucontrol->value.integer.value[1] & 127;
 766         spin_lock_irqsave(&gus->pcm_volume_level_lock, flags);
 767         change = val1 != gus->gf1.pcm_volume_level_left1 ||
 768                  val2 != gus->gf1.pcm_volume_level_right1;
 769         gus->gf1.pcm_volume_level_left1 = val1;
 770         gus->gf1.pcm_volume_level_right1 = val2;
 771         gus->gf1.pcm_volume_level_left = snd_gf1_lvol_to_gvol_raw(val1 << 9) << 4;
 772         gus->gf1.pcm_volume_level_right = snd_gf1_lvol_to_gvol_raw(val2 << 9) << 4;
 773         spin_unlock_irqrestore(&gus->pcm_volume_level_lock, flags);
 774         /* are we active? */
 775         spin_lock_irqsave(&gus->voice_alloc, flags);
 776         for (idx = 0; idx < 32; idx++) {
 777                 pvoice = &gus->gf1.voices[idx];
 778                 if (!pvoice->pcm)
 779                         continue;
 780                 pcmp = pvoice->private_data;
 781                 if (!(pcmp->flags & SNDRV_GF1_PCM_PFLG_ACTIVE))
 782                         continue;
 783                 /* load real volume - better precision */
 784                 spin_lock_irqsave(&gus->reg_lock, flags);
 785                 snd_gf1_select_voice(gus, pvoice->number);
 786                 snd_gf1_ctrl_stop(gus, SNDRV_GF1_VB_VOLUME_CONTROL);
 787                 vol = pvoice == pcmp->pvoices[0] ? gus->gf1.pcm_volume_level_left : gus->gf1.pcm_volume_level_right;
 788                 snd_gf1_write16(gus, SNDRV_GF1_VW_VOLUME, vol);
 789                 pcmp->final_volume = 1;
 790                 spin_unlock_irqrestore(&gus->reg_lock, flags);
 791         }
 792         spin_unlock_irqrestore(&gus->voice_alloc, flags);
 793         return change;
 794 }
 795
 796 static struct snd_kcontrol_new snd_gf1_pcm_volume_control =
 797 {
 798         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 799         .name = "PCM Playback Volume",
 800         .info = snd_gf1_pcm_volume_info,
 801         .get = snd_gf1_pcm_volume_get,
 802         .put = snd_gf1_pcm_volume_put
 803 };
 804
 805 static struct snd_kcontrol_new snd_gf1_pcm_volume_control1 =
 806 {
 807         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 808         .name = "GPCM Playback Volume",
 809         .info = snd_gf1_pcm_volume_info,
 810         .get = snd_gf1_pcm_volume_get,
 811         .put = snd_gf1_pcm_volume_put
 812 };
 813
 814 static struct snd_pcm_ops snd_gf1_pcm_playback_ops = {
 815         .open =         snd_gf1_pcm_playback_open,
 816         .close =        snd_gf1_pcm_playback_close,
 817         .ioctl =        snd_pcm_lib_ioctl,
 818         .hw_params =    snd_gf1_pcm_playback_hw_params,
 819         .hw_free =      snd_gf1_pcm_playback_hw_free,
 820         .prepare =      snd_gf1_pcm_playback_prepare,
 821         .trigger =      snd_gf1_pcm_playback_trigger,
 822         .pointer =      snd_gf1_pcm_playback_pointer,
 823         .copy =         snd_gf1_pcm_playback_copy,
 824         .silence =      snd_gf1_pcm_playback_silence,
 825 };
 826
 827 static struct snd_pcm_ops snd_gf1_pcm_capture_ops = {
 828         .open =         snd_gf1_pcm_capture_open,
 829         .close =        snd_gf1_pcm_capture_close,
 830         .ioctl =        snd_pcm_lib_ioctl,
 831         .hw_params =    snd_gf1_pcm_capture_hw_params,
 832         .hw_free =      snd_gf1_pcm_capture_hw_free,
 833         .prepare =      snd_gf1_pcm_capture_prepare,
 834         .trigger =      snd_gf1_pcm_capture_trigger,
 835         .pointer =      snd_gf1_pcm_capture_pointer,
 836 };
 837
 838 int snd_gf1_pcm_new(struct snd_gus_card * gus, int pcm_dev, int control_index, struct snd_pcm ** rpcm)
 839 {
 840         struct snd_card *card;
 841         struct snd_kcontrol *kctl;
 842         struct snd_pcm *pcm;
 843         struct snd_pcm_substream *substream;
 844         int capture, err;
 845
 846         if (rpcm)
 847                 *rpcm = NULL;
 848         card = gus->card;
 849         capture = !gus->interwave && !gus->ess_flag && !gus->ace_flag ? 1 : 0;
 850         err = snd_pcm_new(card,
 851                           gus->interwave ? "AMD InterWave" : "GF1",
 852                           pcm_dev,
 853                           gus->gf1.pcm_channels / 2,
 854                           capture,
 855                           &pcm);
 856         if (err < 0)
 857                 return err;
 858         pcm->private_data = gus;
 859         /* playback setup */
 860         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_gf1_pcm_playback_ops);
 861
 862         for (substream = pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream; substream; substream = substream->next)
 863                 snd_pcm_lib_preallocate_pages(substream, SNDRV_DMA_TYPE_DEV,
 864                                               snd_dma_isa_data(),
 865                                               64*1024, gus->gf1.dma1 > 3 ? 128*1024 : 64*1024);
 866
 867         pcm->info_flags = 0;
 868         pcm->dev_subclass = SNDRV_PCM_SUBCLASS_GENERIC_MIX;
 869         if (capture) {
 870                 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_gf1_pcm_capture_ops);
 871                 if (gus->gf1.dma2 == gus->gf1.dma1)
 872                         pcm->info_flags |= SNDRV_PCM_INFO_HALF_DUPLEX;
 873                 snd_pcm_lib_preallocate_pages(pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream,
 874                                               SNDRV_DMA_TYPE_DEV, snd_dma_isa_data(),
 875                                               64*1024, gus->gf1.dma2 > 3 ? 128*1024 : 64*1024);
 876         }
 877         strcpy(pcm->name, pcm->id);
 878         if (gus->interwave) {
 879                 sprintf(pcm->name + strlen(pcm->name), " rev %c", gus->revision + 'A');
 880         }
 881         strcat(pcm->name, " (synth)");
 882         gus->pcm = pcm;
 883
 884         if (gus->codec_flag)
 885                 kctl = snd_ctl_new1(&snd_gf1_pcm_volume_control1, gus);
 886         else
 887                 kctl = snd_ctl_new1(&snd_gf1_pcm_volume_control, gus);
 888         if ((err = snd_ctl_add(card, kctl)) < 0)
 889                 return err;
 890         kctl->id.index = control_index;
 891
 892         if (rpcm)
 893                 *rpcm = pcm;
 894         return 0;
 895 }
 896