git.oblomov.eu Git - linux-2.6/blob - sound/pci/cs46xx/dsp_spos_scb_lib.c

   1 /*
   2  *
   3  *   This program is free software; you can redistribute it and/or modify
   4  *   it under the terms of the GNU General Public License as published by
   5  *   the Free Software Foundation; either version 2 of the License, or
   6  *   (at your option) any later version.
   7  *
   8  *   This program is distributed in the hope that it will be useful,
   9  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  *   GNU General Public License for more details.
  12  *
  13  *   You should have received a copy of the GNU General Public License
  14  *   along with this program; if not, write to the Free Software
  15  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  16  *
  17  */
  18
  19 /*
  20  * 2002-07 Benny Sjostrand benny@hostmobility.com
  21  */
  22
  23
  24 #include <sound/driver.h>
  25 #include <asm/io.h>
  26 #include <linux/delay.h>
  27 #include <linux/pci.h>
  28 #include <linux/pm.h>
  29 #include <linux/init.h>
  30 #include <linux/slab.h>
  31 #include <sound/core.h>
  32 #include <sound/control.h>
  33 #include <sound/info.h>
  34 #include <sound/cs46xx.h>
  35
  36 #include "cs46xx_lib.h"
  37 #include "dsp_spos.h"
  38
  39 struct proc_scb_info {
  40         struct dsp_scb_descriptor * scb_desc;
  41         struct snd_cs46xx *chip;
  42 };
  43
  44 static void remove_symbol (struct snd_cs46xx * chip, struct dsp_symbol_entry * symbol)
  45 {
  46         struct dsp_spos_instance * ins = chip->dsp_spos_instance;
  47         int symbol_index = (int)(symbol - ins->symbol_table.symbols);
  48
  49         snd_assert(ins->symbol_table.nsymbols > 0,return);
  50         snd_assert(symbol_index >= 0 && symbol_index < ins->symbol_table.nsymbols, return);
  51
  52         ins->symbol_table.symbols[symbol_index].deleted = 1;
  53
  54         if (symbol_index < ins->symbol_table.highest_frag_index) {
  55                 ins->symbol_table.highest_frag_index = symbol_index;
  56         }
  57
  58         if (symbol_index == ins->symbol_table.nsymbols - 1)
  59                 ins->symbol_table.nsymbols --;
  60
  61         if (ins->symbol_table.highest_frag_index > ins->symbol_table.nsymbols) {
  62                 ins->symbol_table.highest_frag_index = ins->symbol_table.nsymbols;
  63         }
  64
  65 }
  66
  67 #ifdef CONFIG_PROC_FS
  68 static void cs46xx_dsp_proc_scb_info_read (struct snd_info_entry *entry,
  69                                            struct snd_info_buffer *buffer)
  70 {
  71         struct proc_scb_info * scb_info  = entry->private_data;
  72         struct dsp_scb_descriptor * scb = scb_info->scb_desc;
  73         struct dsp_spos_instance * ins;
  74         struct snd_cs46xx *chip = scb_info->chip;
  75         int j,col;
  76         void __iomem *dst = chip->region.idx[1].remap_addr + DSP_PARAMETER_BYTE_OFFSET;
  77
  78         ins = chip->dsp_spos_instance;
  79
  80         down(&chip->spos_mutex);
  81         snd_iprintf(buffer,"%04x %s:\n",scb->address,scb->scb_name);
  82
  83         for (col = 0,j = 0;j < 0x10; j++,col++) {
  84                 if (col == 4) {
  85                         snd_iprintf(buffer,"\n");
  86                         col = 0;
  87                 }
  88                 snd_iprintf(buffer,"%08x ",readl(dst + (scb->address + j) * sizeof(u32)));
  89         }
  90
  91         snd_iprintf(buffer,"\n");
  92
  93         if (scb->parent_scb_ptr != NULL) {
  94                 snd_iprintf(buffer,"parent [%s:%04x] ",
  95                             scb->parent_scb_ptr->scb_name,
  96                             scb->parent_scb_ptr->address);
  97         } else snd_iprintf(buffer,"parent [none] ");
  98
  99         snd_iprintf(buffer,"sub_list_ptr [%s:%04x]\nnext_scb_ptr [%s:%04x]  task_entry [%s:%04x]\n",
 100                     scb->sub_list_ptr->scb_name,
 101                     scb->sub_list_ptr->address,
 102                     scb->next_scb_ptr->scb_name,
 103                     scb->next_scb_ptr->address,
 104                     scb->task_entry->symbol_name,
 105                     scb->task_entry->address);
 106
 107         snd_iprintf(buffer,"index [%d] ref_count [%d]\n",scb->index,scb->ref_count);
 108         up(&chip->spos_mutex);
 109 }
 110 #endif
 111
 112 static void _dsp_unlink_scb (struct snd_cs46xx *chip, struct dsp_scb_descriptor * scb)
 113 {
 114         struct dsp_spos_instance * ins = chip->dsp_spos_instance;
 115         unsigned long flags;
 116
 117         if ( scb->parent_scb_ptr ) {
 118                 /* unlink parent SCB */
 119                 snd_assert ((scb->parent_scb_ptr->sub_list_ptr == scb ||
 120                              scb->parent_scb_ptr->next_scb_ptr == scb),return);
 121
 122                 if (scb->parent_scb_ptr->sub_list_ptr == scb) {
 123
 124                         if (scb->next_scb_ptr == ins->the_null_scb) {
 125                                 /* last and only node in parent sublist */
 126                                 scb->parent_scb_ptr->sub_list_ptr = scb->sub_list_ptr;
 127
 128                                 if (scb->sub_list_ptr != ins->the_null_scb) {
 129                                         scb->sub_list_ptr->parent_scb_ptr = scb->parent_scb_ptr;
 130                                 }
 131                                 scb->sub_list_ptr = ins->the_null_scb;
 132                         } else {
 133                                 /* first node in parent sublist */
 134                                 scb->parent_scb_ptr->sub_list_ptr = scb->next_scb_ptr;
 135
 136                                 if (scb->next_scb_ptr != ins->the_null_scb) {
 137                                         /* update next node parent ptr. */
 138                                         scb->next_scb_ptr->parent_scb_ptr = scb->parent_scb_ptr;
 139                                 }
 140                                 scb->next_scb_ptr = ins->the_null_scb;
 141                         }
 142                 } else {
 143                         /* snd_assert ( (scb->sub_list_ptr == ins->the_null_scb), return); */
 144                         scb->parent_scb_ptr->next_scb_ptr = scb->next_scb_ptr;
 145
 146                         if (scb->next_scb_ptr != ins->the_null_scb) {
 147                                 /* update next node parent ptr. */
 148                                 scb->next_scb_ptr->parent_scb_ptr = scb->parent_scb_ptr;
 149                         }
 150                         scb->next_scb_ptr = ins->the_null_scb;
 151                 }
 152
 153                 spin_lock_irqsave(&chip->reg_lock, flags);
 154
 155                 /* update parent first entry in DSP RAM */
 156                 cs46xx_dsp_spos_update_scb(chip,scb->parent_scb_ptr);
 157
 158                 /* then update entry in DSP RAM */
 159                 cs46xx_dsp_spos_update_scb(chip,scb);
 160
 161                 scb->parent_scb_ptr = NULL;
 162                 spin_unlock_irqrestore(&chip->reg_lock, flags);
 163         }
 164 }
 165
 166 static void _dsp_clear_sample_buffer (struct snd_cs46xx *chip, u32 sample_buffer_addr,
 167                                       int dword_count)
 168 {
 169         void __iomem *dst = chip->region.idx[2].remap_addr + sample_buffer_addr;
 170         int i;
 171
 172         for (i = 0; i < dword_count ; ++i ) {
 173                 writel(0, dst);
 174                 dst += 4;
 175         }
 176 }
 177
 178 void cs46xx_dsp_remove_scb (struct snd_cs46xx *chip, struct dsp_scb_descriptor * scb)
 179 {
 180         struct dsp_spos_instance * ins = chip->dsp_spos_instance;
 181
 182         /* check integrety */
 183         snd_assert ( (scb->index >= 0 &&
 184                       scb->index < ins->nscb &&
 185                       (ins->scbs + scb->index) == scb), return );
 186
 187 #if 0
 188         /* can't remove a SCB with childs before
 189            removing childs first  */
 190         snd_assert ( (scb->sub_list_ptr == ins->the_null_scb &&
 191                       scb->next_scb_ptr == ins->the_null_scb),
 192                      goto _end);
 193 #endif
 194
 195         spin_lock(&scb->lock);
 196         _dsp_unlink_scb (chip,scb);
 197         spin_unlock(&scb->lock);
 198
 199         cs46xx_dsp_proc_free_scb_desc(scb);
 200         snd_assert (scb->scb_symbol != NULL, return );
 201         remove_symbol (chip,scb->scb_symbol);
 202
 203         ins->scbs[scb->index].deleted = 1;
 204
 205         if (scb->index < ins->scb_highest_frag_index)
 206                 ins->scb_highest_frag_index = scb->index;
 207
 208         if (scb->index == ins->nscb - 1) {
 209                 ins->nscb --;
 210         }
 211
 212         if (ins->scb_highest_frag_index > ins->nscb) {
 213                 ins->scb_highest_frag_index = ins->nscb;
 214         }
 215
 216 #if 0
 217         /* !!!! THIS IS A PIECE OF SHIT MADE BY ME !!! */
 218         for(i = scb->index + 1;i < ins->nscb; ++i) {
 219                 ins->scbs[i - 1].index = i - 1;
 220         }
 221 #endif
 222 }
 223
 224
 225 #ifdef CONFIG_PROC_FS
 226 void cs46xx_dsp_proc_free_scb_desc (struct dsp_scb_descriptor * scb)
 227 {
 228         if (scb->proc_info) {
 229                 struct proc_scb_info * scb_info = scb->proc_info->private_data;
 230
 231                 snd_printdd("cs46xx_dsp_proc_free_scb_desc: freeing %s\n",scb->scb_name);
 232
 233                 snd_info_unregister(scb->proc_info);
 234                 scb->proc_info = NULL;
 235
 236                 snd_assert (scb_info != NULL, return);
 237                 kfree (scb_info);
 238         }
 239 }
 240
 241 void cs46xx_dsp_proc_register_scb_desc (struct snd_cs46xx *chip,
 242                                         struct dsp_scb_descriptor * scb)
 243 {
 244         struct dsp_spos_instance * ins = chip->dsp_spos_instance;
 245         struct snd_info_entry * entry;
 246         struct proc_scb_info * scb_info;
 247
 248         /* register to proc */
 249         if (ins->snd_card != NULL && ins->proc_dsp_dir != NULL &&
 250             scb->proc_info == NULL) {
 251
 252                 if ((entry = snd_info_create_card_entry(ins->snd_card, scb->scb_name,
 253                                                         ins->proc_dsp_dir)) != NULL) {
 254                         scb_info = kmalloc(sizeof(struct proc_scb_info), GFP_KERNEL);
 255                         if (!scb_info) {
 256                                 snd_info_free_entry(entry);
 257                                 entry = NULL;
 258                                 goto out;
 259                         }
 260
 261                         scb_info->chip = chip;
 262                         scb_info->scb_desc = scb;
 263
 264                         entry->content = SNDRV_INFO_CONTENT_TEXT;
 265                         entry->private_data = scb_info;
 266                         entry->mode = S_IFREG | S_IRUGO | S_IWUSR;
 267
 268                         entry->c.text.read_size = 512;
 269                         entry->c.text.read = cs46xx_dsp_proc_scb_info_read;
 270
 271                         if (snd_info_register(entry) < 0) {
 272                                 snd_info_free_entry(entry);
 273                                 kfree (scb_info);
 274                                 entry = NULL;
 275                         }
 276                 }
 277 out:
 278                 scb->proc_info = entry;
 279         }
 280 }
 281 #endif /* CONFIG_PROC_FS */
 282
 283 static struct dsp_scb_descriptor *
 284 _dsp_create_generic_scb (struct snd_cs46xx *chip, char * name, u32 * scb_data, u32 dest,
 285                          struct dsp_symbol_entry * task_entry,
 286                          struct dsp_scb_descriptor * parent_scb,
 287                          int scb_child_type)
 288 {
 289         struct dsp_spos_instance * ins = chip->dsp_spos_instance;
 290         struct dsp_scb_descriptor * scb;
 291
 292         unsigned long flags;
 293
 294         snd_assert (ins->the_null_scb != NULL,return NULL);
 295
 296         /* fill the data that will be wroten to DSP */
 297         scb_data[SCBsubListPtr] =
 298                 (ins->the_null_scb->address << 0x10) | ins->the_null_scb->address;
 299
 300         scb_data[SCBfuncEntryPtr] &= 0xFFFF0000;
 301         scb_data[SCBfuncEntryPtr] |= task_entry->address;
 302
 303         snd_printdd("dsp_spos: creating SCB <%s>\n",name);
 304
 305         scb = cs46xx_dsp_create_scb(chip,name,scb_data,dest);
 306
 307
 308         scb->sub_list_ptr = ins->the_null_scb;
 309         scb->next_scb_ptr = ins->the_null_scb;
 310
 311         scb->parent_scb_ptr = parent_scb;
 312         scb->task_entry = task_entry;
 313
 314
 315         /* update parent SCB */
 316         if (scb->parent_scb_ptr) {
 317 #if 0
 318                 printk ("scb->parent_scb_ptr = %s\n",scb->parent_scb_ptr->scb_name);
 319                 printk ("scb->parent_scb_ptr->next_scb_ptr = %s\n",scb->parent_scb_ptr->next_scb_ptr->scb_name);
 320                 printk ("scb->parent_scb_ptr->sub_list_ptr = %s\n",scb->parent_scb_ptr->sub_list_ptr->scb_name);
 321 #endif
 322                 /* link to  parent SCB */
 323                 if (scb_child_type == SCB_ON_PARENT_NEXT_SCB) {
 324                         snd_assert ( (scb->parent_scb_ptr->next_scb_ptr == ins->the_null_scb),
 325                                      return NULL);
 326
 327                         scb->parent_scb_ptr->next_scb_ptr = scb;
 328
 329                 } else if (scb_child_type == SCB_ON_PARENT_SUBLIST_SCB) {
 330                         snd_assert ( (scb->parent_scb_ptr->sub_list_ptr == ins->the_null_scb),
 331                                      return NULL);
 332
 333                         scb->parent_scb_ptr->sub_list_ptr = scb;
 334                 } else {
 335                         snd_assert (0,return NULL);
 336                 }
 337
 338                 spin_lock_irqsave(&chip->reg_lock, flags);
 339
 340                 /* update entry in DSP RAM */
 341                 cs46xx_dsp_spos_update_scb(chip,scb->parent_scb_ptr);
 342
 343                 spin_unlock_irqrestore(&chip->reg_lock, flags);
 344         }
 345
 346
 347         cs46xx_dsp_proc_register_scb_desc (chip,scb);
 348
 349         return scb;
 350 }
 351
 352 static struct dsp_scb_descriptor *
 353 cs46xx_dsp_create_generic_scb (struct snd_cs46xx *chip, char * name, u32 * scb_data,
 354                                u32 dest, char * task_entry_name,
 355                                struct dsp_scb_descriptor * parent_scb,
 356                                int scb_child_type)
 357 {
 358         struct dsp_symbol_entry * task_entry;
 359
 360         task_entry = cs46xx_dsp_lookup_symbol (chip,task_entry_name,
 361                                                SYMBOL_CODE);
 362
 363         if (task_entry == NULL) {
 364                 snd_printk (KERN_ERR "dsp_spos: symbol %s not found\n",task_entry_name);
 365                 return NULL;
 366         }
 367
 368         return _dsp_create_generic_scb (chip,name,scb_data,dest,task_entry,
 369                                         parent_scb,scb_child_type);
 370 }
 371
 372 struct dsp_scb_descriptor *
 373 cs46xx_dsp_create_timing_master_scb (struct snd_cs46xx *chip)
 374 {
 375         struct dsp_scb_descriptor * scb;
 376
 377         struct dsp_timing_master_scb timing_master_scb = {
 378                 { 0,
 379                   0,
 380                   0,
 381                   0
 382                 },
 383                 { 0,
 384                   0,
 385                   0,
 386                   0,
 387                   0
 388                 },
 389                 0,0,
 390                 0,NULL_SCB_ADDR,
 391                 0,0,             /* extraSampleAccum:TMreserved */
 392                 0,0,             /* codecFIFOptr:codecFIFOsyncd */
 393                 0x0001,0x8000,   /* fracSampAccumQm1:TMfrmsLeftInGroup */
 394                 0x0001,0x0000,   /* fracSampCorrectionQm1:TMfrmGroupLength */
 395                 0x00060000       /* nSampPerFrmQ15 */
 396         };
 397
 398         scb = cs46xx_dsp_create_generic_scb(chip,"TimingMasterSCBInst",(u32 *)&timing_master_scb,
 399                                             TIMINGMASTER_SCB_ADDR,
 400                                             "TIMINGMASTER",NULL,SCB_NO_PARENT);
 401
 402         return scb;
 403 }
 404
 405
 406 struct dsp_scb_descriptor *
 407 cs46xx_dsp_create_codec_out_scb(struct snd_cs46xx * chip, char * codec_name,
 408                                 u16 channel_disp, u16 fifo_addr, u16 child_scb_addr,
 409                                 u32 dest, struct dsp_scb_descriptor * parent_scb,
 410                                 int scb_child_type)
 411 {
 412         struct dsp_scb_descriptor * scb;
 413
 414         struct dsp_codec_output_scb codec_out_scb = {
 415                 { 0,
 416                   0,
 417                   0,
 418                   0
 419                 },
 420                 {
 421                         0,
 422                         0,
 423                         0,
 424                         0,
 425                         0
 426                 },
 427                 0,0,
 428                 0,NULL_SCB_ADDR,
 429                 0,                      /* COstrmRsConfig */
 430                 0,                      /* COstrmBufPtr */
 431                 channel_disp,fifo_addr, /* leftChanBaseIOaddr:rightChanIOdisp */
 432                 0x0000,0x0080,          /* (!AC97!) COexpVolChangeRate:COscaleShiftCount */
 433                 0,child_scb_addr        /* COreserved - need child scb to work with rom code */
 434         };
 435
 436
 437         scb = cs46xx_dsp_create_generic_scb(chip,codec_name,(u32 *)&codec_out_scb,
 438                                             dest,"S16_CODECOUTPUTTASK",parent_scb,
 439                                             scb_child_type);
 440
 441         return scb;
 442 }
 443
 444 struct dsp_scb_descriptor *
 445 cs46xx_dsp_create_codec_in_scb(struct snd_cs46xx * chip, char * codec_name,
 446                                u16 channel_disp, u16 fifo_addr, u16 sample_buffer_addr,
 447                                u32 dest, struct dsp_scb_descriptor * parent_scb,
 448                                int scb_child_type)
 449 {
 450
 451         struct dsp_scb_descriptor * scb;
 452         struct dsp_codec_input_scb codec_input_scb = {
 453                 { 0,
 454                   0,
 455                   0,
 456                   0
 457                 },
 458                 {
 459                         0,
 460                         0,
 461                         0,
 462                         0,
 463                         0
 464                 },
 465
 466 #if 0  /* cs4620 */
 467                 SyncIOSCB,NULL_SCB_ADDR
 468 #else
 469                 0 , 0,
 470 #endif
 471                 0,0,
 472
 473                 RSCONFIG_SAMPLE_16STEREO + RSCONFIG_MODULO_64,  /* strmRsConfig */
 474                 sample_buffer_addr << 0x10,       /* strmBufPtr; defined as a dword ptr, used as a byte ptr */
 475                 channel_disp,fifo_addr,           /* (!AC97!) leftChanBaseINaddr=AC97primary
 476                                                      link input slot 3 :rightChanINdisp=""slot 4 */
 477                 0x0000,0x0000,                    /* (!AC97!) ????:scaleShiftCount; no shift needed
 478                                                      because AC97 is already 20 bits */
 479                 0x80008000                        /* ??clw cwcgame.scb has 0 */
 480         };
 481
 482         scb = cs46xx_dsp_create_generic_scb(chip,codec_name,(u32 *)&codec_input_scb,
 483                                             dest,"S16_CODECINPUTTASK",parent_scb,
 484                                             scb_child_type);
 485         return scb;
 486 }
 487
 488
 489 static struct dsp_scb_descriptor *
 490 cs46xx_dsp_create_pcm_reader_scb(struct snd_cs46xx * chip, char * scb_name,
 491                                  u16 sample_buffer_addr, u32 dest,
 492                                  int virtual_channel, u32 playback_hw_addr,
 493                                  struct dsp_scb_descriptor * parent_scb,
 494                                  int scb_child_type)
 495 {
 496         struct dsp_spos_instance * ins = chip->dsp_spos_instance;
 497         struct dsp_scb_descriptor * scb;
 498
 499         struct dsp_generic_scb pcm_reader_scb = {
 500
 501                 /*
 502                   Play DMA Task xfers data from host buffer to SP buffer
 503                   init/runtime variables:
 504                   PlayAC: Play Audio Data Conversion - SCB loc: 2nd dword, mask: 0x0000F000L
 505                   DATA_FMT_16BIT_ST_LTLEND(0x00000000L)   from 16-bit stereo, little-endian
 506                   DATA_FMT_8_BIT_ST_SIGNED(0x00001000L)   from 8-bit stereo, signed
 507                   DATA_FMT_16BIT_MN_LTLEND(0x00002000L)   from 16-bit mono, little-endian
 508                   DATA_FMT_8_BIT_MN_SIGNED(0x00003000L)   from 8-bit mono, signed
 509                   DATA_FMT_16BIT_ST_BIGEND(0x00004000L)   from 16-bit stereo, big-endian
 510                   DATA_FMT_16BIT_MN_BIGEND(0x00006000L)   from 16-bit mono, big-endian
 511                   DATA_FMT_8_BIT_ST_UNSIGNED(0x00009000L) from 8-bit stereo, unsigned
 512                   DATA_FMT_8_BIT_MN_UNSIGNED(0x0000b000L) from 8-bit mono, unsigned
 513                   ? Other combinations possible from:
 514                   DMA_RQ_C2_AUDIO_CONVERT_MASK    0x0000F000L
 515                   DMA_RQ_C2_AC_NONE               0x00000000L
 516                   DMA_RQ_C2_AC_8_TO_16_BIT        0x00001000L
 517                   DMA_RQ_C2_AC_MONO_TO_STEREO     0x00002000L
 518                   DMA_RQ_C2_AC_ENDIAN_CONVERT     0x00004000L
 519                   DMA_RQ_C2_AC_SIGNED_CONVERT     0x00008000L
 520
 521                   HostBuffAddr: Host Buffer Physical Byte Address - SCB loc:3rd dword, Mask: 0xFFFFFFFFL
 522                   aligned to dword boundary
 523                 */
 524                 /* Basic (non scatter/gather) DMA requestor (4 ints) */
 525                 { DMA_RQ_C1_SOURCE_ON_HOST +        /* source buffer is on the host */
 526                   DMA_RQ_C1_SOURCE_MOD1024 +        /* source buffer is 1024 dwords (4096 bytes) */
 527                   DMA_RQ_C1_DEST_MOD32 +            /* dest buffer(PCMreaderBuf) is 32 dwords*/
 528                   DMA_RQ_C1_WRITEBACK_SRC_FLAG +    /* ?? */
 529                   DMA_RQ_C1_WRITEBACK_DEST_FLAG +   /* ?? */
 530                   15,                             /* DwordCount-1: picked 16 for DwordCount because Jim */
 531                   /*        Barnette said that is what we should use since */
 532                   /*        we are not running in optimized mode? */
 533                   DMA_RQ_C2_AC_NONE +
 534                   DMA_RQ_C2_SIGNAL_SOURCE_PINGPONG + /* set play interrupt (bit0) in HISR when source */
 535                   /*   buffer (on host) crosses half-way point */
 536                   virtual_channel,                   /* Play DMA channel arbitrarily set to 0 */
 537                   playback_hw_addr,                  /* HostBuffAddr (source) */
 538                   DMA_RQ_SD_SP_SAMPLE_ADDR +         /* destination buffer is in SP Sample Memory */
 539                   sample_buffer_addr                 /* SP Buffer Address (destination) */
 540                 },
 541                 /* Scatter/gather DMA requestor extension   (5 ints) */
 542                 {
 543                         0,
 544                         0,
 545                         0,
 546                         0,
 547                         0
 548                 },
 549                 /* Sublist pointer & next stream control block (SCB) link. */
 550                 NULL_SCB_ADDR,NULL_SCB_ADDR,
 551                 /* Pointer to this tasks parameter block & stream function pointer */
 552                 0,NULL_SCB_ADDR,
 553                 /* rsConfig register for stream buffer (rsDMA reg. is loaded from basicReq.daw */
 554                 /*   for incoming streams, or basicReq.saw, for outgoing streams) */
 555                 RSCONFIG_DMA_ENABLE +                 /* enable DMA */
 556                 (19 << RSCONFIG_MAX_DMA_SIZE_SHIFT) + /* MAX_DMA_SIZE picked to be 19 since SPUD  */
 557                 /*  uses it for some reason */
 558                 ((dest >> 4) << RSCONFIG_STREAM_NUM_SHIFT) + /* stream number = SCBaddr/16 */
 559                 RSCONFIG_SAMPLE_16STEREO +
 560                 RSCONFIG_MODULO_32,             /* dest buffer(PCMreaderBuf) is 32 dwords (256 bytes) */
 561                 /* Stream sample pointer & MAC-unit mode for this stream */
 562                 (sample_buffer_addr << 0x10),
 563                 /* Fractional increment per output sample in the input sample buffer */
 564                 0,
 565                 {
 566                         /* Standard stereo volume control
 567                            default muted */
 568                         0xffff,0xffff,
 569                         0xffff,0xffff
 570                 }
 571         };
 572
 573         if (ins->null_algorithm == NULL) {
 574                 ins->null_algorithm =  cs46xx_dsp_lookup_symbol (chip,"NULLALGORITHM",
 575                                                                  SYMBOL_CODE);
 576
 577                 if (ins->null_algorithm == NULL) {
 578                         snd_printk (KERN_ERR "dsp_spos: symbol NULLALGORITHM not found\n");
 579                         return NULL;
 580                 }
 581         }
 582
 583         scb = _dsp_create_generic_scb(chip,scb_name,(u32 *)&pcm_reader_scb,
 584                                       dest,ins->null_algorithm,parent_scb,
 585                                       scb_child_type);
 586
 587         return scb;
 588 }
 589
 590 #define GOF_PER_SEC 200
 591
 592 struct dsp_scb_descriptor *
 593 cs46xx_dsp_create_src_task_scb(struct snd_cs46xx * chip, char * scb_name,
 594                                int rate,
 595                                u16 src_buffer_addr,
 596                                u16 src_delay_buffer_addr, u32 dest,
 597                                struct dsp_scb_descriptor * parent_scb,
 598                                int scb_child_type,
 599                                int pass_through)
 600 {
 601
 602         struct dsp_spos_instance * ins = chip->dsp_spos_instance;
 603         struct dsp_scb_descriptor * scb;
 604         unsigned int tmp1, tmp2;
 605         unsigned int phiIncr;
 606         unsigned int correctionPerGOF, correctionPerSec;
 607
 608         snd_printdd( "dsp_spos: setting %s rate to %u\n",scb_name,rate);
 609
 610         /*
 611          *  Compute the values used to drive the actual sample rate conversion.
 612          *  The following formulas are being computed, using inline assembly
 613          *  since we need to use 64 bit arithmetic to compute the values:
 614          *
 615          *  phiIncr = floor((Fs,in * 2^26) / Fs,out)
 616          *  correctionPerGOF = floor((Fs,in * 2^26 - Fs,out * phiIncr) /
 617          *                                   GOF_PER_SEC)
 618          *  ulCorrectionPerSec = Fs,in * 2^26 - Fs,out * phiIncr -M
 619          *                       GOF_PER_SEC * correctionPerGOF
 620          *
 621          *  i.e.
 622          *
 623          *  phiIncr:other = dividend:remainder((Fs,in * 2^26) / Fs,out)
 624          *  correctionPerGOF:correctionPerSec =
 625          *      dividend:remainder(ulOther / GOF_PER_SEC)
 626          */
 627         tmp1 = rate << 16;
 628         phiIncr = tmp1 / 48000;
 629         tmp1 -= phiIncr * 48000;
 630         tmp1 <<= 10;
 631         phiIncr <<= 10;
 632         tmp2 = tmp1 / 48000;
 633         phiIncr += tmp2;
 634         tmp1 -= tmp2 * 48000;
 635         correctionPerGOF = tmp1 / GOF_PER_SEC;
 636         tmp1 -= correctionPerGOF * GOF_PER_SEC;
 637         correctionPerSec = tmp1;
 638
 639         {
 640                 struct dsp_src_task_scb src_task_scb = {
 641                         0x0028,0x00c8,
 642                         0x5555,0x0000,
 643                         0x0000,0x0000,
 644                         src_buffer_addr,1,
 645                         correctionPerGOF,correctionPerSec,
 646                         RSCONFIG_SAMPLE_16STEREO + RSCONFIG_MODULO_32,
 647                         0x0000,src_delay_buffer_addr,
 648                         0x0,
 649                         0x080,(src_delay_buffer_addr + (24 * 4)),
 650                         0,0, /* next_scb, sub_list_ptr */
 651                         0,0, /* entry, this_spb */
 652                         RSCONFIG_SAMPLE_16STEREO + RSCONFIG_MODULO_8,
 653                         src_buffer_addr << 0x10,
 654                         phiIncr,
 655                         {
 656                                 0xffff - ins->dac_volume_right,0xffff - ins->dac_volume_left,
 657                                 0xffff - ins->dac_volume_right,0xffff - ins->dac_volume_left
 658                         }
 659                 };
 660
 661                 if (ins->s16_up == NULL) {
 662                         ins->s16_up =  cs46xx_dsp_lookup_symbol (chip,"S16_UPSRC",
 663                                                                  SYMBOL_CODE);
 664
 665                         if (ins->s16_up == NULL) {
 666                                 snd_printk (KERN_ERR "dsp_spos: symbol S16_UPSRC not found\n");
 667                                 return NULL;
 668                         }
 669                 }
 670
 671                 /* clear buffers */
 672                 _dsp_clear_sample_buffer (chip,src_buffer_addr,8);
 673                 _dsp_clear_sample_buffer (chip,src_delay_buffer_addr,32);
 674
 675                 if (pass_through) {
 676                         /* wont work with any other rate than
 677                            the native DSP rate */
 678                         snd_assert (rate = 48000);
 679
 680                         scb = cs46xx_dsp_create_generic_scb(chip,scb_name,(u32 *)&src_task_scb,
 681                                                             dest,"DMAREADER",parent_scb,
 682                                                             scb_child_type);
 683                 } else {
 684                         scb = _dsp_create_generic_scb(chip,scb_name,(u32 *)&src_task_scb,
 685                                                       dest,ins->s16_up,parent_scb,
 686                                                       scb_child_type);
 687                 }
 688
 689
 690         }
 691
 692         return scb;
 693 }
 694
 695 #if 0 /* not used */
 696 struct dsp_scb_descriptor *
 697 cs46xx_dsp_create_filter_scb(struct snd_cs46xx * chip, char * scb_name,
 698                              u16 buffer_addr, u32 dest,
 699                              struct dsp_scb_descriptor * parent_scb,
 700                              int scb_child_type) {
 701         struct dsp_scb_descriptor * scb;
 702
 703         struct dsp_filter_scb filter_scb = {
 704                 .a0_right            = 0x41a9,
 705                 .a0_left             = 0x41a9,
 706                 .a1_right            = 0xb8e4,
 707                 .a1_left             = 0xb8e4,
 708                 .a2_right            = 0x3e55,
 709                 .a2_left             = 0x3e55,
 710
 711                 .filter_unused3      = 0x0000,
 712                 .filter_unused2      = 0x0000,
 713
 714                 .output_buf_ptr      = buffer_addr,
 715                 .init                = 0x000,
 716
 717                 .prev_sample_output1 = 0x00000000,
 718                 .prev_sample_output2 = 0x00000000,
 719
 720                 .prev_sample_input1  = 0x00000000,
 721                 .prev_sample_input2  = 0x00000000,
 722
 723                 .next_scb_ptr        = 0x0000,
 724                 .sub_list_ptr        = 0x0000,
 725
 726                 .entry_point         = 0x0000,
 727                 .spb_ptr             = 0x0000,
 728
 729                 .b0_right            = 0x0e38,
 730                 .b0_left             = 0x0e38,
 731                 .b1_right            = 0x1c71,
 732                 .b1_left             = 0x1c71,
 733                 .b2_right            = 0x0e38,
 734                 .b2_left             = 0x0e38,
 735         };
 736
 737
 738         scb = cs46xx_dsp_create_generic_scb(chip,scb_name,(u32 *)&filter_scb,
 739                                             dest,"FILTERTASK",parent_scb,
 740                                             scb_child_type);
 741
 742         return scb;
 743 }
 744 #endif /* not used */
 745
 746 struct dsp_scb_descriptor *
 747 cs46xx_dsp_create_mix_only_scb(struct snd_cs46xx * chip, char * scb_name,
 748                                u16 mix_buffer_addr, u32 dest,
 749                                struct dsp_scb_descriptor * parent_scb,
 750                                int scb_child_type)
 751 {
 752         struct dsp_scb_descriptor * scb;
 753
 754         struct dsp_mix_only_scb master_mix_scb = {
 755                 /* 0 */ { 0,
 756                           /* 1 */   0,
 757                           /* 2 */  mix_buffer_addr,
 758                           /* 3 */  0
 759                           /*   */ },
 760                 {
 761                         /* 4 */  0,
 762                         /* 5 */  0,
 763                         /* 6 */  0,
 764                         /* 7 */  0,
 765                         /* 8 */  0x00000080
 766                 },
 767                 /* 9 */ 0,0,
 768                 /* A */ 0,0,
 769                 /* B */ RSCONFIG_SAMPLE_16STEREO + RSCONFIG_MODULO_32,
 770                 /* C */ (mix_buffer_addr  + (16 * 4)) << 0x10,
 771                 /* D */ 0,
 772                 {
 773                         /* E */ 0x8000,0x8000,
 774                         /* F */ 0x8000,0x8000
 775                 }
 776         };
 777
 778
 779         scb = cs46xx_dsp_create_generic_scb(chip,scb_name,(u32 *)&master_mix_scb,
 780                                             dest,"S16_MIX",parent_scb,
 781                                             scb_child_type);
 782         return scb;
 783 }
 784
 785
 786 struct dsp_scb_descriptor *
 787 cs46xx_dsp_create_mix_to_ostream_scb(struct snd_cs46xx * chip, char * scb_name,
 788                                      u16 mix_buffer_addr, u16 writeback_spb, u32 dest,
 789                                      struct dsp_scb_descriptor * parent_scb,
 790                                      int scb_child_type)
 791 {
 792         struct dsp_scb_descriptor * scb;
 793
 794         struct dsp_mix2_ostream_scb mix2_ostream_scb = {
 795                 /* Basic (non scatter/gather) DMA requestor (4 ints) */
 796                 {
 797                         DMA_RQ_C1_SOURCE_MOD64 +
 798                         DMA_RQ_C1_DEST_ON_HOST +
 799                         DMA_RQ_C1_DEST_MOD1024 +
 800                         DMA_RQ_C1_WRITEBACK_SRC_FLAG +
 801                         DMA_RQ_C1_WRITEBACK_DEST_FLAG +
 802                         15,
 803
 804                         DMA_RQ_C2_AC_NONE +
 805                         DMA_RQ_C2_SIGNAL_DEST_PINGPONG +
 806
 807                         CS46XX_DSP_CAPTURE_CHANNEL,
 808                         DMA_RQ_SD_SP_SAMPLE_ADDR +
 809                         mix_buffer_addr,
 810                         0x0
 811                 },
 812
 813                 { 0, 0, 0, 0, 0, },
 814                 0,0,
 815                 0,writeback_spb,
 816
 817                 RSCONFIG_DMA_ENABLE +
 818                 (19 << RSCONFIG_MAX_DMA_SIZE_SHIFT) +
 819
 820                 ((dest >> 4) << RSCONFIG_STREAM_NUM_SHIFT) +
 821                 RSCONFIG_DMA_TO_HOST +
 822                 RSCONFIG_SAMPLE_16STEREO +
 823                 RSCONFIG_MODULO_64,
 824                 (mix_buffer_addr + (32 * 4)) << 0x10,
 825                 1,0,
 826                 0x0001,0x0080,
 827                 0xFFFF,0
 828         };
 829
 830
 831         scb = cs46xx_dsp_create_generic_scb(chip,scb_name,(u32 *)&mix2_ostream_scb,
 832
 833             dest,"S16_MIX_TO_OSTREAM",parent_scb,
 834                                             scb_child_type);
 835
 836         return scb;
 837 }
 838
 839
 840 struct dsp_scb_descriptor *
 841 cs46xx_dsp_create_vari_decimate_scb(struct snd_cs46xx * chip,char * scb_name,
 842                                     u16 vari_buffer_addr0,
 843                                     u16 vari_buffer_addr1,
 844                                     u32 dest,
 845                                     struct dsp_scb_descriptor * parent_scb,
 846                                     int scb_child_type)
 847 {
 848
 849         struct dsp_scb_descriptor * scb;
 850
 851         struct dsp_vari_decimate_scb vari_decimate_scb = {
 852                 0x0028,0x00c8,
 853                 0x5555,0x0000,
 854                 0x0000,0x0000,
 855                 vari_buffer_addr0,vari_buffer_addr1,
 856
 857                 0x0028,0x00c8,
 858                 RSCONFIG_SAMPLE_16STEREO + RSCONFIG_MODULO_256,
 859
 860                 0xFF800000,
 861                 0,
 862                 0x0080,vari_buffer_addr1 + (25 * 4),
 863
 864                 0,0,
 865                 0,0,
 866
 867                 RSCONFIG_SAMPLE_16STEREO + RSCONFIG_MODULO_8,
 868                 vari_buffer_addr0 << 0x10,
 869                 0x04000000,
 870                 {
 871                         0x8000,0x8000,
 872                         0xFFFF,0xFFFF
 873                 }
 874         };
 875
 876         scb = cs46xx_dsp_create_generic_scb(chip,scb_name,(u32 *)&vari_decimate_scb,
 877                                             dest,"VARIDECIMATE",parent_scb,
 878                                             scb_child_type);
 879
 880         return scb;
 881 }
 882
 883
 884 static struct dsp_scb_descriptor *
 885 cs46xx_dsp_create_pcm_serial_input_scb(struct snd_cs46xx * chip, char * scb_name, u32 dest,
 886                                        struct dsp_scb_descriptor * input_scb,
 887                                        struct dsp_scb_descriptor * parent_scb,
 888                                        int scb_child_type)
 889 {
 890
 891         struct dsp_scb_descriptor * scb;
 892
 893
 894         struct dsp_pcm_serial_input_scb pcm_serial_input_scb = {
 895                 { 0,
 896                   0,
 897                   0,
 898                   0
 899                 },
 900                 {
 901                         0,
 902                         0,
 903                         0,
 904                         0,
 905                         0
 906                 },
 907
 908                 0,0,
 909                 0,0,
 910
 911                 RSCONFIG_SAMPLE_16STEREO + RSCONFIG_MODULO_16,
 912                 0,
 913       /* 0xD */ 0,input_scb->address,
 914                 {
 915       /* 0xE */   0x8000,0x8000,
 916       /* 0xF */   0x8000,0x8000
 917                 }
 918         };
 919
 920         scb = cs46xx_dsp_create_generic_scb(chip,scb_name,(u32 *)&pcm_serial_input_scb,
 921                                             dest,"PCMSERIALINPUTTASK",parent_scb,
 922                                             scb_child_type);
 923         return scb;
 924 }
 925
 926
 927 static struct dsp_scb_descriptor *
 928 cs46xx_dsp_create_asynch_fg_tx_scb(struct snd_cs46xx * chip, char * scb_name, u32 dest,
 929                                    u16 hfg_scb_address,
 930                                    u16 asynch_buffer_address,
 931                                    struct dsp_scb_descriptor * parent_scb,
 932                                    int scb_child_type)
 933 {
 934
 935         struct dsp_scb_descriptor * scb;
 936
 937         struct dsp_asynch_fg_tx_scb asynch_fg_tx_scb = {
 938                 0xfc00,0x03ff,      /*  Prototype sample buffer size of 256 dwords */
 939                 0x0058,0x0028,      /* Min Delta 7 dwords == 28 bytes */
 940                 /* : Max delta 25 dwords == 100 bytes */
 941                 0,hfg_scb_address,  /* Point to HFG task SCB */
 942                 0,0,                /* Initialize current Delta and Consumer ptr adjustment count */
 943                 0,                  /* Initialize accumulated Phi to 0 */
 944                 0,0x2aab,           /* Const 1/3 */
 945
 946                 {
 947                         0,         /* Define the unused elements */
 948                         0,
 949                         0
 950                 },
 951
 952                 0,0,
 953                 0,dest + AFGTxAccumPhi,
 954
 955                 RSCONFIG_SAMPLE_16STEREO + RSCONFIG_MODULO_256, /* Stereo, 256 dword */
 956                 (asynch_buffer_address) << 0x10,  /* This should be automagically synchronized
 957                                                      to the producer pointer */
 958
 959                 /* There is no correct initial value, it will depend upon the detected
 960                    rate etc  */
 961                 0x18000000,                     /* Phi increment for approx 32k operation */
 962                 0x8000,0x8000,                  /* Volume controls are unused at this time */
 963                 0x8000,0x8000
 964         };
 965
 966         scb = cs46xx_dsp_create_generic_scb(chip,scb_name,(u32 *)&asynch_fg_tx_scb,
 967                                             dest,"ASYNCHFGTXCODE",parent_scb,
 968                                             scb_child_type);
 969
 970         return scb;
 971 }
 972
 973
 974 struct dsp_scb_descriptor *
 975 cs46xx_dsp_create_asynch_fg_rx_scb(struct snd_cs46xx * chip, char * scb_name, u32 dest,
 976                                    u16 hfg_scb_address,
 977                                    u16 asynch_buffer_address,
 978                                    struct dsp_scb_descriptor * parent_scb,
 979                                    int scb_child_type)
 980 {
 981         struct dsp_spos_instance * ins = chip->dsp_spos_instance;
 982         struct dsp_scb_descriptor * scb;
 983
 984         struct dsp_asynch_fg_rx_scb asynch_fg_rx_scb = {
 985                 0xfe00,0x01ff,      /*  Prototype sample buffer size of 128 dwords */
 986                 0x0064,0x001c,      /* Min Delta 7 dwords == 28 bytes */
 987                                     /* : Max delta 25 dwords == 100 bytes */
 988                 0,hfg_scb_address,  /* Point to HFG task SCB */
 989                 0,0,                            /* Initialize current Delta and Consumer ptr adjustment count */
 990                 {
 991                         0,                /* Define the unused elements */
 992                         0,
 993                         0,
 994                         0,
 995                         0
 996                 },
 997
 998                 0,0,
 999                 0,dest,
1000
1001                 RSCONFIG_MODULO_128 |
1002         RSCONFIG_SAMPLE_16STEREO,                         /* Stereo, 128 dword */
1003                 ( (asynch_buffer_address + (16 * 4))  << 0x10),   /* This should be automagically
1004                                                                                           synchrinized to the producer pointer */
1005
1006                 /* There is no correct initial value, it will depend upon the detected
1007                    rate etc  */
1008                 0x18000000,
1009
1010                 /* Set IEC958 input volume */
1011                 0xffff - ins->spdif_input_volume_right,0xffff - ins->spdif_input_volume_left,
1012                 0xffff - ins->spdif_input_volume_right,0xffff - ins->spdif_input_volume_left,
1013         };
1014
1015         scb = cs46xx_dsp_create_generic_scb(chip,scb_name,(u32 *)&asynch_fg_rx_scb,
1016                                             dest,"ASYNCHFGRXCODE",parent_scb,
1017                                             scb_child_type);
1018
1019         return scb;
1020 }
1021
1022
1023 #if 0 /* not used */
1024 struct dsp_scb_descriptor *
1025 cs46xx_dsp_create_output_snoop_scb(struct snd_cs46xx * chip, char * scb_name, u32 dest,
1026                                    u16 snoop_buffer_address,
1027                                    struct dsp_scb_descriptor * snoop_scb,
1028                                    struct dsp_scb_descriptor * parent_scb,
1029                                    int scb_child_type)
1030 {
1031
1032         struct dsp_scb_descriptor * scb;
1033
1034         struct dsp_output_snoop_scb output_snoop_scb = {
1035                 { 0,    /*  not used.  Zero */
1036                   0,
1037                   0,
1038                   0,
1039                 },
1040                 {
1041                         0, /* not used.  Zero */
1042                         0,
1043                         0,
1044                         0,
1045                         0
1046                 },
1047
1048                 0,0,
1049                 0,0,
1050
1051                 RSCONFIG_SAMPLE_16STEREO + RSCONFIG_MODULO_64,
1052                 snoop_buffer_address << 0x10,
1053                 0,0,
1054                 0,
1055                 0,snoop_scb->address
1056         };
1057
1058         scb = cs46xx_dsp_create_generic_scb(chip,scb_name,(u32 *)&output_snoop_scb,
1059                                             dest,"OUTPUTSNOOP",parent_scb,
1060                                             scb_child_type);
1061         return scb;
1062 }
1063 #endif /* not used */
1064
1065
1066 struct dsp_scb_descriptor *
1067 cs46xx_dsp_create_spio_write_scb(struct snd_cs46xx * chip, char * scb_name, u32 dest,
1068                                  struct dsp_scb_descriptor * parent_scb,
1069                                  int scb_child_type)
1070 {
1071         struct dsp_scb_descriptor * scb;
1072
1073         struct dsp_spio_write_scb spio_write_scb = {
1074                 0,0,         /*   SPIOWAddress2:SPIOWAddress1; */
1075                 0,           /*   SPIOWData1; */
1076                 0,           /*   SPIOWData2; */
1077                 0,0,         /*   SPIOWAddress4:SPIOWAddress3; */
1078                 0,           /*   SPIOWData3; */
1079                 0,           /*   SPIOWData4; */
1080                 0,0,         /*   SPIOWDataPtr:Unused1; */
1081                 { 0,0 },     /*   Unused2[2]; */
1082
1083                 0,0,         /*   SPIOWChildPtr:SPIOWSiblingPtr; */
1084                 0,0,         /*   SPIOWThisPtr:SPIOWEntryPoint; */
1085
1086                 {
1087                         0,
1088                         0,
1089                         0,
1090                         0,
1091                         0          /*   Unused3[5];  */
1092                 }
1093         };
1094
1095         scb = cs46xx_dsp_create_generic_scb(chip,scb_name,(u32 *)&spio_write_scb,
1096                                             dest,"SPIOWRITE",parent_scb,
1097                                             scb_child_type);
1098
1099         return scb;
1100 }
1101
1102 struct dsp_scb_descriptor *
1103 cs46xx_dsp_create_magic_snoop_scb(struct snd_cs46xx * chip, char * scb_name, u32 dest,
1104                                   u16 snoop_buffer_address,
1105                                   struct dsp_scb_descriptor * snoop_scb,
1106                                   struct dsp_scb_descriptor * parent_scb,
1107                                   int scb_child_type)
1108 {
1109         struct dsp_scb_descriptor * scb;
1110
1111         struct dsp_magic_snoop_task magic_snoop_scb = {
1112                 /* 0 */ 0, /* i0 */
1113                 /* 1 */ 0, /* i1 */
1114                 /* 2 */ snoop_buffer_address << 0x10,
1115                 /* 3 */ 0,snoop_scb->address,
1116                 /* 4 */ 0, /* i3 */
1117                 /* 5 */ 0, /* i4 */
1118                 /* 6 */ 0, /* i5 */
1119                 /* 7 */ 0, /* i6 */
1120                 /* 8 */ 0, /* i7 */
1121                 /* 9 */ 0,0, /* next_scb, sub_list_ptr */
1122                 /* A */ 0,0, /* entry_point, this_ptr */
1123                 /* B */ RSCONFIG_SAMPLE_16STEREO + RSCONFIG_MODULO_64,
1124                 /* C */ snoop_buffer_address  << 0x10,
1125                 /* D */ 0,
1126                 /* E */ { 0x8000,0x8000,
1127                 /* F */   0xffff,0xffff
1128                 }
1129         };
1130
1131         scb = cs46xx_dsp_create_generic_scb(chip,scb_name,(u32 *)&magic_snoop_scb,
1132                                             dest,"MAGICSNOOPTASK",parent_scb,
1133                                             scb_child_type);
1134
1135         return scb;
1136 }
1137
1138 static struct dsp_scb_descriptor *
1139 find_next_free_scb (struct snd_cs46xx * chip, struct dsp_scb_descriptor * from)
1140 {
1141         struct dsp_spos_instance * ins = chip->dsp_spos_instance;
1142         struct dsp_scb_descriptor * scb = from;
1143
1144         while (scb->next_scb_ptr != ins->the_null_scb) {
1145                 snd_assert (scb->next_scb_ptr != NULL, return NULL);
1146
1147                 scb = scb->next_scb_ptr;
1148         }
1149
1150         return scb;
1151 }
1152
1153 static u32 pcm_reader_buffer_addr[DSP_MAX_PCM_CHANNELS] = {
1154         0x0600, /* 1 */
1155         0x1500, /* 2 */
1156         0x1580, /* 3 */
1157         0x1600, /* 4 */
1158         0x1680, /* 5 */
1159         0x1700, /* 6 */
1160         0x1780, /* 7 */
1161         0x1800, /* 8 */
1162         0x1880, /* 9 */
1163         0x1900, /* 10 */
1164         0x1980, /* 11 */
1165         0x1A00, /* 12 */
1166         0x1A80, /* 13 */
1167         0x1B00, /* 14 */
1168         0x1B80, /* 15 */
1169         0x1C00, /* 16 */
1170         0x1C80, /* 17 */
1171         0x1D00, /* 18 */
1172         0x1D80, /* 19 */
1173         0x1E00, /* 20 */
1174         0x1E80, /* 21 */
1175         0x1F00, /* 22 */
1176         0x1F80, /* 23 */
1177         0x2000, /* 24 */
1178         0x2080, /* 25 */
1179         0x2100, /* 26 */
1180         0x2180, /* 27 */
1181         0x2200, /* 28 */
1182         0x2280, /* 29 */
1183         0x2300, /* 30 */
1184         0x2380, /* 31 */
1185         0x2400, /* 32 */
1186 };
1187
1188 static u32 src_output_buffer_addr[DSP_MAX_SRC_NR] = {
1189         0x2B80,
1190         0x2BA0,
1191         0x2BC0,
1192         0x2BE0,
1193         0x2D00,
1194         0x2D20,
1195         0x2D40,
1196         0x2D60,
1197         0x2D80,
1198         0x2DA0,
1199         0x2DC0,
1200         0x2DE0,
1201         0x2E00,
1202         0x2E20
1203 };
1204
1205 static u32 src_delay_buffer_addr[DSP_MAX_SRC_NR] = {
1206         0x2480,
1207         0x2500,
1208         0x2580,
1209         0x2600,
1210         0x2680,
1211         0x2700,
1212         0x2780,
1213         0x2800,
1214         0x2880,
1215         0x2900,
1216         0x2980,
1217         0x2A00,
1218         0x2A80,
1219         0x2B00
1220 };
1221
1222 struct dsp_pcm_channel_descriptor *
1223 cs46xx_dsp_create_pcm_channel (struct snd_cs46xx * chip,
1224                                u32 sample_rate, void * private_data,
1225                                u32 hw_dma_addr,
1226                                int pcm_channel_id)
1227 {
1228         struct dsp_spos_instance * ins = chip->dsp_spos_instance;
1229         struct dsp_scb_descriptor * src_scb = NULL, * pcm_scb, * mixer_scb = NULL;
1230         struct dsp_scb_descriptor * src_parent_scb = NULL;
1231
1232         /* struct dsp_scb_descriptor * pcm_parent_scb; */
1233         char scb_name[DSP_MAX_SCB_NAME];
1234         int i, pcm_index = -1, insert_point, src_index = -1, pass_through = 0;
1235         unsigned long flags;
1236
1237         switch (pcm_channel_id) {
1238         case DSP_PCM_MAIN_CHANNEL:
1239                 mixer_scb = ins->master_mix_scb;
1240                 break;
1241         case DSP_PCM_REAR_CHANNEL:
1242                 mixer_scb = ins->rear_mix_scb;
1243                 break;
1244         case DSP_PCM_CENTER_LFE_CHANNEL:
1245                 mixer_scb = ins->center_lfe_mix_scb;
1246                 break;
1247         case DSP_PCM_S71_CHANNEL:
1248                 /* TODO */
1249                 snd_assert(0);
1250                 break;
1251         case DSP_IEC958_CHANNEL:
1252                 snd_assert (ins->asynch_tx_scb != NULL, return NULL);
1253                 mixer_scb = ins->asynch_tx_scb;
1254
1255                 /* if sample rate is set to 48khz we pass
1256                    the Sample Rate Converted (which could
1257                    alter the raw data stream ...) */
1258                 if (sample_rate == 48000) {
1259                         snd_printdd ("IEC958 pass through\n");
1260                         /* Hack to bypass creating a new SRC */
1261                         pass_through = 1;
1262                 }
1263                 break;
1264         default:
1265                 snd_assert (0);
1266                 return NULL;
1267         }
1268         /* default sample rate is 44100 */
1269         if (!sample_rate) sample_rate = 44100;
1270
1271         /* search for a already created SRC SCB with the same sample rate */
1272         for (i = 0; i < DSP_MAX_PCM_CHANNELS &&
1273                      (pcm_index == -1 || src_scb == NULL); ++i) {
1274
1275                 /* virtual channel reserved
1276                    for capture */
1277                 if (i == CS46XX_DSP_CAPTURE_CHANNEL) continue;
1278
1279                 if (ins->pcm_channels[i].active) {
1280                         if (!src_scb &&
1281                             ins->pcm_channels[i].sample_rate == sample_rate &&
1282                             ins->pcm_channels[i].mixer_scb == mixer_scb) {
1283                                 src_scb = ins->pcm_channels[i].src_scb;
1284                                 ins->pcm_channels[i].src_scb->ref_count ++;
1285                                 src_index = ins->pcm_channels[i].src_slot;
1286                         }
1287                 } else if (pcm_index == -1) {
1288                         pcm_index = i;
1289                 }
1290         }
1291
1292         if (pcm_index == -1) {
1293                 snd_printk (KERN_ERR "dsp_spos: no free PCM channel\n");
1294                 return NULL;
1295         }
1296
1297         if (src_scb == NULL) {
1298                 if (ins->nsrc_scb >= DSP_MAX_SRC_NR) {
1299                         snd_printk(KERN_ERR "dsp_spos: to many SRC instances\n!");
1300                         return NULL;
1301                 }
1302
1303                 /* find a free slot */
1304                 for (i = 0; i < DSP_MAX_SRC_NR; ++i) {
1305                         if (ins->src_scb_slots[i] == 0) {
1306                                 src_index = i;
1307                                 ins->src_scb_slots[i] = 1;
1308                                 break;
1309                         }
1310                 }
1311                 snd_assert (src_index != -1,return NULL);
1312
1313                 /* we need to create a new SRC SCB */
1314                 if (mixer_scb->sub_list_ptr == ins->the_null_scb) {
1315                         src_parent_scb = mixer_scb;
1316                         insert_point = SCB_ON_PARENT_SUBLIST_SCB;
1317                 } else {
1318                         src_parent_scb = find_next_free_scb(chip,mixer_scb->sub_list_ptr);
1319                         insert_point = SCB_ON_PARENT_NEXT_SCB;
1320                 }
1321
1322                 snprintf (scb_name,DSP_MAX_SCB_NAME,"SrcTask_SCB%d",src_index);
1323
1324                 snd_printdd( "dsp_spos: creating SRC \"%s\"\n",scb_name);
1325                 src_scb = cs46xx_dsp_create_src_task_scb(chip,scb_name,
1326                                                          sample_rate,
1327                                                          src_output_buffer_addr[src_index],
1328                                                          src_delay_buffer_addr[src_index],
1329                                                          /* 0x400 - 0x600 source SCBs */
1330                                                          0x400 + (src_index * 0x10) ,
1331                                                          src_parent_scb,
1332                                                          insert_point,
1333                                                          pass_through);
1334
1335                 if (!src_scb) {
1336                         snd_printk (KERN_ERR "dsp_spos: failed to create SRCtaskSCB\n");
1337                         return NULL;
1338                 }
1339
1340                 /* cs46xx_dsp_set_src_sample_rate(chip,src_scb,sample_rate); */
1341
1342                 ins->nsrc_scb ++;
1343         }
1344
1345
1346         snprintf (scb_name,DSP_MAX_SCB_NAME,"PCMReader_SCB%d",pcm_index);
1347
1348         snd_printdd( "dsp_spos: creating PCM \"%s\" (%d)\n",scb_name,
1349                  pcm_channel_id);
1350
1351         pcm_scb = cs46xx_dsp_create_pcm_reader_scb(chip,scb_name,
1352                                                    pcm_reader_buffer_addr[pcm_index],
1353                                                    /* 0x200 - 400 PCMreader SCBs */
1354                                                    (pcm_index * 0x10) + 0x200,
1355                                                    pcm_index,    /* virtual channel 0-31 */
1356                                                    hw_dma_addr,  /* pcm hw addr */
1357                            NULL,         /* parent SCB ptr */
1358                            0             /* insert point */
1359                            );
1360
1361         if (!pcm_scb) {
1362                 snd_printk (KERN_ERR "dsp_spos: failed to create PCMreaderSCB\n");
1363                 return NULL;
1364         }
1365
1366         spin_lock_irqsave(&chip->reg_lock, flags);
1367         ins->pcm_channels[pcm_index].sample_rate = sample_rate;
1368         ins->pcm_channels[pcm_index].pcm_reader_scb = pcm_scb;
1369         ins->pcm_channels[pcm_index].src_scb = src_scb;
1370         ins->pcm_channels[pcm_index].unlinked = 1;
1371         ins->pcm_channels[pcm_index].private_data = private_data;
1372         ins->pcm_channels[pcm_index].src_slot = src_index;
1373         ins->pcm_channels[pcm_index].active = 1;
1374         ins->pcm_channels[pcm_index].pcm_slot = pcm_index;
1375         ins->pcm_channels[pcm_index].mixer_scb = mixer_scb;
1376         ins->npcm_channels ++;
1377         spin_unlock_irqrestore(&chip->reg_lock, flags);
1378
1379         return (ins->pcm_channels + pcm_index);
1380 }
1381
1382 int cs46xx_dsp_pcm_channel_set_period (struct snd_cs46xx * chip,
1383                                        struct dsp_pcm_channel_descriptor * pcm_channel,
1384                                        int period_size)
1385 {
1386         u32 temp = snd_cs46xx_peek (chip,pcm_channel->pcm_reader_scb->address << 2);
1387         temp &= ~DMA_RQ_C1_SOURCE_SIZE_MASK;
1388
1389         switch (period_size) {
1390         case 2048:
1391                 temp |= DMA_RQ_C1_SOURCE_MOD1024;
1392                 break;
1393         case 1024:
1394                 temp |= DMA_RQ_C1_SOURCE_MOD512;
1395                 break;
1396         case 512:
1397                 temp |= DMA_RQ_C1_SOURCE_MOD256;
1398                 break;
1399         case 256:
1400                 temp |= DMA_RQ_C1_SOURCE_MOD128;
1401                 break;
1402         case 128:
1403                 temp |= DMA_RQ_C1_SOURCE_MOD64;
1404                 break;
1405         case 64:
1406                 temp |= DMA_RQ_C1_SOURCE_MOD32;
1407                 break;
1408         case 32:
1409                 temp |= DMA_RQ_C1_SOURCE_MOD16;
1410                 break;
1411         default:
1412                 snd_printdd ("period size (%d) not supported by HW\n", period_size);
1413                 return -EINVAL;
1414         }
1415
1416         snd_cs46xx_poke (chip,pcm_channel->pcm_reader_scb->address << 2,temp);
1417
1418         return 0;
1419 }
1420
1421 int cs46xx_dsp_pcm_ostream_set_period (struct snd_cs46xx * chip,
1422                                        int period_size)
1423 {
1424         u32 temp = snd_cs46xx_peek (chip,WRITEBACK_SCB_ADDR << 2);
1425         temp &= ~DMA_RQ_C1_DEST_SIZE_MASK;
1426
1427         switch (period_size) {
1428         case 2048:
1429                 temp |= DMA_RQ_C1_DEST_MOD1024;
1430                 break;
1431         case 1024:
1432                 temp |= DMA_RQ_C1_DEST_MOD512;
1433                 break;
1434         case 512:
1435                 temp |= DMA_RQ_C1_DEST_MOD256;
1436                 break;
1437         case 256:
1438                 temp |= DMA_RQ_C1_DEST_MOD128;
1439                 break;
1440         case 128:
1441                 temp |= DMA_RQ_C1_DEST_MOD64;
1442                 break;
1443         case 64:
1444                 temp |= DMA_RQ_C1_DEST_MOD32;
1445                 break;
1446         case 32:
1447                 temp |= DMA_RQ_C1_DEST_MOD16;
1448                 break;
1449         default:
1450                 snd_printdd ("period size (%d) not supported by HW\n", period_size);
1451                 return -EINVAL;
1452         }
1453
1454         snd_cs46xx_poke (chip,WRITEBACK_SCB_ADDR << 2,temp);
1455
1456         return 0;
1457 }
1458
1459 void cs46xx_dsp_destroy_pcm_channel (struct snd_cs46xx * chip,
1460                                      struct dsp_pcm_channel_descriptor * pcm_channel)
1461 {
1462         struct dsp_spos_instance * ins = chip->dsp_spos_instance;
1463         unsigned long flags;
1464
1465         snd_assert(pcm_channel->active, return );
1466         snd_assert(ins->npcm_channels > 0, return );
1467         snd_assert(pcm_channel->src_scb->ref_count > 0, return );
1468
1469         spin_lock_irqsave(&chip->reg_lock, flags);
1470         pcm_channel->unlinked = 1;
1471         pcm_channel->active = 0;
1472         pcm_channel->private_data = NULL;
1473         pcm_channel->src_scb->ref_count --;
1474         ins->npcm_channels --;
1475         spin_unlock_irqrestore(&chip->reg_lock, flags);
1476
1477         cs46xx_dsp_remove_scb(chip,pcm_channel->pcm_reader_scb);
1478
1479         if (!pcm_channel->src_scb->ref_count) {
1480                 cs46xx_dsp_remove_scb(chip,pcm_channel->src_scb);
1481
1482                 snd_assert (pcm_channel->src_slot >= 0 && pcm_channel->src_slot <= DSP_MAX_SRC_NR,
1483                             return );
1484
1485                 ins->src_scb_slots[pcm_channel->src_slot] = 0;
1486                 ins->nsrc_scb --;
1487         }
1488 }
1489
1490 int cs46xx_dsp_pcm_unlink (struct snd_cs46xx * chip,
1491                            struct dsp_pcm_channel_descriptor * pcm_channel)
1492 {
1493         struct dsp_spos_instance * ins = chip->dsp_spos_instance;
1494         unsigned long flags;
1495
1496         snd_assert(pcm_channel->active,return -EIO);
1497         snd_assert(ins->npcm_channels > 0,return -EIO);
1498
1499         spin_lock(&pcm_channel->src_scb->lock);
1500
1501         if (pcm_channel->unlinked) {
1502                 spin_unlock(&pcm_channel->src_scb->lock);
1503                 return -EIO;
1504         }
1505
1506         spin_lock_irqsave(&chip->reg_lock, flags);
1507         pcm_channel->unlinked = 1;
1508         spin_unlock_irqrestore(&chip->reg_lock, flags);
1509
1510         _dsp_unlink_scb (chip,pcm_channel->pcm_reader_scb);
1511
1512         spin_unlock(&pcm_channel->src_scb->lock);
1513         return 0;
1514 }
1515
1516 int cs46xx_dsp_pcm_link (struct snd_cs46xx * chip,
1517                          struct dsp_pcm_channel_descriptor * pcm_channel)
1518 {
1519         struct dsp_spos_instance * ins = chip->dsp_spos_instance;
1520         struct dsp_scb_descriptor * parent_scb;
1521         struct dsp_scb_descriptor * src_scb = pcm_channel->src_scb;
1522         unsigned long flags;
1523
1524         spin_lock(&pcm_channel->src_scb->lock);
1525
1526         if (pcm_channel->unlinked == 0) {
1527                 spin_unlock(&pcm_channel->src_scb->lock);
1528                 return -EIO;
1529         }
1530
1531         parent_scb = src_scb;
1532
1533         if (src_scb->sub_list_ptr != ins->the_null_scb) {
1534                 src_scb->sub_list_ptr->parent_scb_ptr = pcm_channel->pcm_reader_scb;
1535                 pcm_channel->pcm_reader_scb->next_scb_ptr = src_scb->sub_list_ptr;
1536         }
1537
1538         src_scb->sub_list_ptr = pcm_channel->pcm_reader_scb;
1539
1540         snd_assert (pcm_channel->pcm_reader_scb->parent_scb_ptr == NULL, ; );
1541         pcm_channel->pcm_reader_scb->parent_scb_ptr = parent_scb;
1542
1543         spin_lock_irqsave(&chip->reg_lock, flags);
1544
1545         /* update SCB entry in DSP RAM */
1546         cs46xx_dsp_spos_update_scb(chip,pcm_channel->pcm_reader_scb);
1547
1548         /* update parent SCB entry */
1549         cs46xx_dsp_spos_update_scb(chip,parent_scb);
1550
1551         pcm_channel->unlinked = 0;
1552         spin_unlock_irqrestore(&chip->reg_lock, flags);
1553
1554         spin_unlock(&pcm_channel->src_scb->lock);
1555         return 0;
1556 }
1557
1558 struct dsp_scb_descriptor *
1559 cs46xx_add_record_source (struct snd_cs46xx *chip, struct dsp_scb_descriptor * source,
1560                           u16 addr, char * scb_name)
1561 {
1562         struct dsp_spos_instance * ins = chip->dsp_spos_instance;
1563         struct dsp_scb_descriptor * parent;
1564         struct dsp_scb_descriptor * pcm_input;
1565         int insert_point;
1566
1567         snd_assert (ins->record_mixer_scb != NULL,return NULL);
1568
1569         if (ins->record_mixer_scb->sub_list_ptr != ins->the_null_scb) {
1570                 parent = find_next_free_scb (chip,ins->record_mixer_scb->sub_list_ptr);
1571                 insert_point = SCB_ON_PARENT_NEXT_SCB;
1572         } else {
1573                 parent = ins->record_mixer_scb;
1574                 insert_point = SCB_ON_PARENT_SUBLIST_SCB;
1575         }
1576
1577         pcm_input = cs46xx_dsp_create_pcm_serial_input_scb(chip,scb_name,addr,
1578                                                            source, parent,
1579                                                            insert_point);
1580
1581         return pcm_input;
1582 }
1583
1584 int cs46xx_src_unlink(struct snd_cs46xx *chip, struct dsp_scb_descriptor * src)
1585 {
1586         snd_assert (src->parent_scb_ptr != NULL,  return -EINVAL );
1587
1588         /* mute SCB */
1589         cs46xx_dsp_scb_set_volume (chip,src,0,0);
1590
1591         _dsp_unlink_scb (chip,src);
1592
1593         return 0;
1594 }
1595
1596 int cs46xx_src_link(struct snd_cs46xx *chip, struct dsp_scb_descriptor * src)
1597 {
1598         struct dsp_spos_instance * ins = chip->dsp_spos_instance;
1599         struct dsp_scb_descriptor * parent_scb;
1600
1601         snd_assert (src->parent_scb_ptr == NULL,   return -EINVAL );
1602         snd_assert(ins->master_mix_scb !=NULL,   return -EINVAL );
1603
1604         if (ins->master_mix_scb->sub_list_ptr != ins->the_null_scb) {
1605                 parent_scb = find_next_free_scb (chip,ins->master_mix_scb->sub_list_ptr);
1606                 parent_scb->next_scb_ptr = src;
1607         } else {
1608                 parent_scb = ins->master_mix_scb;
1609                 parent_scb->sub_list_ptr = src;
1610         }
1611
1612         src->parent_scb_ptr = parent_scb;
1613
1614         /* update entry in DSP RAM */
1615         cs46xx_dsp_spos_update_scb(chip,parent_scb);
1616
1617         return 0;
1618 }
1619
1620 int cs46xx_dsp_enable_spdif_out (struct snd_cs46xx *chip)
1621 {
1622         struct dsp_spos_instance * ins = chip->dsp_spos_instance;
1623
1624         if ( ! (ins->spdif_status_out & DSP_SPDIF_STATUS_HW_ENABLED) ) {
1625                 cs46xx_dsp_enable_spdif_hw (chip);
1626         }
1627
1628         /* dont touch anything if SPDIF is open */
1629         if ( ins->spdif_status_out & DSP_SPDIF_STATUS_PLAYBACK_OPEN) {
1630                 /* when cs46xx_iec958_post_close(...) is called it
1631                    will call this function if necessary depending on
1632                    this bit */
1633                 ins->spdif_status_out |= DSP_SPDIF_STATUS_OUTPUT_ENABLED;
1634
1635                 return -EBUSY;
1636         }
1637
1638         snd_assert (ins->asynch_tx_scb == NULL, return -EINVAL);
1639         snd_assert (ins->master_mix_scb->next_scb_ptr == ins->the_null_scb, return -EINVAL);
1640
1641         /* reset output snooper sample buffer pointer */
1642         snd_cs46xx_poke (chip, (ins->ref_snoop_scb->address + 2) << 2,
1643                          (OUTPUT_SNOOP_BUFFER + 0x10) << 0x10 );
1644
1645         /* The asynch. transfer task */
1646         ins->asynch_tx_scb = cs46xx_dsp_create_asynch_fg_tx_scb(chip,"AsynchFGTxSCB",ASYNCTX_SCB_ADDR,
1647                                                                 SPDIFO_SCB_INST,
1648                                                                 SPDIFO_IP_OUTPUT_BUFFER1,
1649                                                                 ins->master_mix_scb,
1650                                                                 SCB_ON_PARENT_NEXT_SCB);
1651         if (!ins->asynch_tx_scb) return -ENOMEM;
1652
1653         ins->spdif_pcm_input_scb = cs46xx_dsp_create_pcm_serial_input_scb(chip,"PCMSerialInput_II",
1654                                                                           PCMSERIALINII_SCB_ADDR,
1655                                                                           ins->ref_snoop_scb,
1656                                                                           ins->asynch_tx_scb,
1657                                                                           SCB_ON_PARENT_SUBLIST_SCB);
1658
1659
1660         if (!ins->spdif_pcm_input_scb) return -ENOMEM;
1661
1662         /* monitor state */
1663         ins->spdif_status_out |= DSP_SPDIF_STATUS_OUTPUT_ENABLED;
1664
1665         return 0;
1666 }
1667
1668 int  cs46xx_dsp_disable_spdif_out (struct snd_cs46xx *chip)
1669 {
1670         struct dsp_spos_instance * ins = chip->dsp_spos_instance;
1671
1672         /* dont touch anything if SPDIF is open */
1673         if ( ins->spdif_status_out & DSP_SPDIF_STATUS_PLAYBACK_OPEN) {
1674                 ins->spdif_status_out &= ~DSP_SPDIF_STATUS_OUTPUT_ENABLED;
1675                 return -EBUSY;
1676         }
1677
1678         /* check integrety */
1679         snd_assert (ins->asynch_tx_scb != NULL, return -EINVAL);
1680         snd_assert (ins->spdif_pcm_input_scb != NULL,return -EINVAL);
1681         snd_assert (ins->master_mix_scb->next_scb_ptr == ins->asynch_tx_scb, return -EINVAL);
1682         snd_assert (ins->asynch_tx_scb->parent_scb_ptr == ins->master_mix_scb, return -EINVAL);
1683
1684         cs46xx_dsp_remove_scb (chip,ins->spdif_pcm_input_scb);
1685         cs46xx_dsp_remove_scb (chip,ins->asynch_tx_scb);
1686
1687         ins->spdif_pcm_input_scb = NULL;
1688         ins->asynch_tx_scb = NULL;
1689
1690         /* clear buffer to prevent any undesired noise */
1691         _dsp_clear_sample_buffer(chip,SPDIFO_IP_OUTPUT_BUFFER1,256);
1692
1693         /* monitor state */
1694         ins->spdif_status_out  &= ~DSP_SPDIF_STATUS_OUTPUT_ENABLED;
1695
1696
1697         return 0;
1698 }
1699
1700 int cs46xx_iec958_pre_open (struct snd_cs46xx *chip)
1701 {
1702         struct dsp_spos_instance * ins = chip->dsp_spos_instance;
1703
1704         if ( ins->spdif_status_out & DSP_SPDIF_STATUS_OUTPUT_ENABLED ) {
1705                 /* remove AsynchFGTxSCB and and PCMSerialInput_II */
1706                 cs46xx_dsp_disable_spdif_out (chip);
1707
1708                 /* save state */
1709                 ins->spdif_status_out |= DSP_SPDIF_STATUS_OUTPUT_ENABLED;
1710         }
1711
1712         /* if not enabled already */
1713         if ( !(ins->spdif_status_out & DSP_SPDIF_STATUS_HW_ENABLED) ) {
1714                 cs46xx_dsp_enable_spdif_hw (chip);
1715         }
1716
1717         /* Create the asynch. transfer task  for playback */
1718         ins->asynch_tx_scb = cs46xx_dsp_create_asynch_fg_tx_scb(chip,"AsynchFGTxSCB",ASYNCTX_SCB_ADDR,
1719                                                                 SPDIFO_SCB_INST,
1720                                                                 SPDIFO_IP_OUTPUT_BUFFER1,
1721                                                                 ins->master_mix_scb,
1722                                                                 SCB_ON_PARENT_NEXT_SCB);
1723
1724
1725         /* set spdif channel status value for streaming */
1726         cs46xx_poke_via_dsp (chip,SP_SPDOUT_CSUV, ins->spdif_csuv_stream);
1727
1728         ins->spdif_status_out  |= DSP_SPDIF_STATUS_PLAYBACK_OPEN;
1729
1730         return 0;
1731 }
1732
1733 int cs46xx_iec958_post_close (struct snd_cs46xx *chip)
1734 {
1735         struct dsp_spos_instance * ins = chip->dsp_spos_instance;
1736
1737         snd_assert (ins->asynch_tx_scb != NULL, return -EINVAL);
1738
1739         ins->spdif_status_out  &= ~DSP_SPDIF_STATUS_PLAYBACK_OPEN;
1740
1741         /* restore settings */
1742         cs46xx_poke_via_dsp (chip,SP_SPDOUT_CSUV, ins->spdif_csuv_default);
1743
1744         /* deallocate stuff */
1745         if (ins->spdif_pcm_input_scb != NULL) {
1746                 cs46xx_dsp_remove_scb (chip,ins->spdif_pcm_input_scb);
1747                 ins->spdif_pcm_input_scb = NULL;
1748         }
1749
1750         cs46xx_dsp_remove_scb (chip,ins->asynch_tx_scb);
1751         ins->asynch_tx_scb = NULL;
1752
1753         /* clear buffer to prevent any undesired noise */
1754         _dsp_clear_sample_buffer(chip,SPDIFO_IP_OUTPUT_BUFFER1,256);
1755
1756         /* restore state */
1757         if ( ins->spdif_status_out & DSP_SPDIF_STATUS_OUTPUT_ENABLED ) {
1758                 cs46xx_dsp_enable_spdif_out (chip);
1759         }
1760
1761         return 0;
1762 }