sound/ppc/snd_ps3.c

   1 /*
   2  * Audio support for PS3
   3  * Copyright (C) 2007 Sony Computer Entertainment Inc.
   4  * All rights reserved.
   5  * Copyright 2006, 2007 Sony Corporation
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License
   9  * as published by the Free Software Foundation; version 2 of the Licence.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  19  */
  20
  21 #include <linux/dma-mapping.h>
  22 #include <linux/dmapool.h>
  23 #include <linux/gfp.h>
  24 #include <linux/init.h>
  25 #include <linux/interrupt.h>
  26 #include <linux/io.h>
  27 #include <linux/module.h>
  28
  29 #include <sound/asound.h>
  30 #include <sound/control.h>
  31 #include <sound/core.h>
  32 #include <sound/initval.h>
  33 #include <sound/memalloc.h>
  34 #include <sound/pcm.h>
  35 #include <sound/pcm_params.h>
  36
  37 #include <asm/dma.h>
  38 #include <asm/firmware.h>
  39 #include <asm/lv1call.h>
  40 #include <asm/ps3.h>
  41 #include <asm/ps3av.h>
  42
  43 #include "snd_ps3.h"
  44 #include "snd_ps3_reg.h"
  45
  46
  47 /*
  48  * global
  49  */
  50 static struct snd_ps3_card_info the_card;
  51
  52 static int snd_ps3_start_delay = CONFIG_SND_PS3_DEFAULT_START_DELAY;
  53
  54 module_param_named(start_delay, snd_ps3_start_delay, uint, 0644);
  55 MODULE_PARM_DESC(start_delay, "time to insert silent data in ms");
  56
  57 static int index = SNDRV_DEFAULT_IDX1;
  58 static char *id = SNDRV_DEFAULT_STR1;
  59
  60 module_param(index, int, 0444);
  61 MODULE_PARM_DESC(index, "Index value for PS3 soundchip.");
  62 module_param(id, charp, 0444);
  63 MODULE_PARM_DESC(id, "ID string for PS3 soundchip.");
  64
  65
  66 /*
  67  * PS3 audio register access
  68  */
  69 static inline u32 read_reg(unsigned int reg)
  70 {
  71         return in_be32(the_card.mapped_mmio_vaddr + reg);
  72 }
  73 static inline void write_reg(unsigned int reg, u32 val)
  74 {
  75         out_be32(the_card.mapped_mmio_vaddr + reg, val);
  76 }
  77 static inline void update_reg(unsigned int reg, u32 or_val)
  78 {
  79         u32 newval = read_reg(reg) | or_val;
  80         write_reg(reg, newval);
  81 }
  82 static inline void update_mask_reg(unsigned int reg, u32 mask, u32 or_val)
  83 {
  84         u32 newval = (read_reg(reg) & mask) | or_val;
  85         write_reg(reg, newval);
  86 }
  87
  88 /*
  89  * ALSA defs
  90  */
  91 static const struct snd_pcm_hardware snd_ps3_pcm_hw = {
  92         .info = (SNDRV_PCM_INFO_MMAP |
  93                  SNDRV_PCM_INFO_NONINTERLEAVED |
  94                  SNDRV_PCM_INFO_MMAP_VALID),
  95         .formats = (SNDRV_PCM_FMTBIT_S16_BE |
  96                     SNDRV_PCM_FMTBIT_S24_BE),
  97         .rates = (SNDRV_PCM_RATE_44100 |
  98                   SNDRV_PCM_RATE_48000 |
  99                   SNDRV_PCM_RATE_88200 |
 100                   SNDRV_PCM_RATE_96000),
 101         .rate_min = 44100,
 102         .rate_max = 96000,
 103
 104         .channels_min = 2, /* stereo only */
 105         .channels_max = 2,
 106
 107         .buffer_bytes_max = PS3_AUDIO_FIFO_SIZE * 64,
 108
 109         /* interrupt by four stages */
 110         .period_bytes_min = PS3_AUDIO_FIFO_STAGE_SIZE * 4,
 111         .period_bytes_max = PS3_AUDIO_FIFO_STAGE_SIZE * 4,
 112
 113         .periods_min = 16,
 114         .periods_max = 32, /* buffer_size_max/ period_bytes_max */
 115
 116         .fifo_size = PS3_AUDIO_FIFO_SIZE
 117 };
 118
 119 static int snd_ps3_verify_dma_stop(struct snd_ps3_card_info *card,
 120                                    int count, int force_stop)
 121 {
 122         int dma_ch, done, retries, stop_forced = 0;
 123         uint32_t status;
 124
 125         for (dma_ch = 0; dma_ch < 8; dma_ch++) {
 126                 retries = count;
 127                 do {
 128                         status = read_reg(PS3_AUDIO_KICK(dma_ch)) &
 129                                 PS3_AUDIO_KICK_STATUS_MASK;
 130                         switch (status) {
 131                         case PS3_AUDIO_KICK_STATUS_DONE:
 132                         case PS3_AUDIO_KICK_STATUS_NOTIFY:
 133                         case PS3_AUDIO_KICK_STATUS_CLEAR:
 134                         case PS3_AUDIO_KICK_STATUS_ERROR:
 135                                 done = 1;
 136                                 break;
 137                         default:
 138                                 done = 0;
 139                                 udelay(10);
 140                         }
 141                 } while (!done && --retries);
 142                 if (!retries && force_stop) {
 143                         pr_info("%s: DMA ch %d is not stopped.",
 144                                 __func__, dma_ch);
 145                         /* last resort. force to stop dma.
 146                          *  NOTE: this cause DMA done interrupts
 147                          */
 148                         update_reg(PS3_AUDIO_CONFIG, PS3_AUDIO_CONFIG_CLEAR);
 149                         stop_forced = 1;
 150                 }
 151         }
 152         return stop_forced;
 153 }
 154
 155 /*
 156  * wait for all dma is done.
 157  * NOTE: caller should reset card->running before call.
 158  *       If not, the interrupt handler will re-start DMA,
 159  *       then DMA is never stopped.
 160  */
 161 static void snd_ps3_wait_for_dma_stop(struct snd_ps3_card_info *card)
 162 {
 163         int stop_forced;
 164         /*
 165          * wait for the last dma is done
 166          */
 167
 168         /*
 169          * expected maximum DMA done time is 5.7ms + something (DMA itself).
 170          * 5.7ms is from 16bit/sample 2ch 44.1Khz; the time next
 171          * DMA kick event would occur.
 172          */
 173         stop_forced = snd_ps3_verify_dma_stop(card, 700, 1);
 174
 175         /*
 176          * clear outstanding interrupts.
 177          */
 178         update_reg(PS3_AUDIO_INTR_0, 0);
 179         update_reg(PS3_AUDIO_AX_IS, 0);
 180
 181         /*
 182          *revert CLEAR bit since it will not reset automatically after DMA stop
 183          */
 184         if (stop_forced)
 185                 update_mask_reg(PS3_AUDIO_CONFIG, ~PS3_AUDIO_CONFIG_CLEAR, 0);
 186         /* ensure the hardware sees changes */
 187         wmb();
 188 }
 189
 190 static void snd_ps3_kick_dma(struct snd_ps3_card_info *card)
 191 {
 192
 193         update_reg(PS3_AUDIO_KICK(0), PS3_AUDIO_KICK_REQUEST);
 194         /* ensure the hardware sees the change */
 195         wmb();
 196 }
 197
 198 /*
 199  * convert virtual addr to ioif bus addr.
 200  */
 201 static dma_addr_t v_to_bus(struct snd_ps3_card_info *card, void *paddr, int ch)
 202 {
 203         return card->dma_start_bus_addr[ch] +
 204                 (paddr - card->dma_start_vaddr[ch]);
 205 };
 206
 207
 208 /*
 209  * increment ring buffer pointer.
 210  * NOTE: caller must hold write spinlock
 211  */
 212 static void snd_ps3_bump_buffer(struct snd_ps3_card_info *card,
 213                                 enum snd_ps3_ch ch, size_t byte_count,
 214                                 int stage)
 215 {
 216         if (!stage)
 217                 card->dma_last_transfer_vaddr[ch] =
 218                         card->dma_next_transfer_vaddr[ch];
 219         card->dma_next_transfer_vaddr[ch] += byte_count;
 220         if ((card->dma_start_vaddr[ch] + (card->dma_buffer_size / 2)) <=
 221             card->dma_next_transfer_vaddr[ch]) {
 222                 card->dma_next_transfer_vaddr[ch] = card->dma_start_vaddr[ch];
 223         }
 224 }
 225 /*
 226  * setup dmac to send data to audio and attenuate samples on the ring buffer
 227  */
 228 static int snd_ps3_program_dma(struct snd_ps3_card_info *card,
 229                                enum snd_ps3_dma_filltype filltype)
 230 {
 231         /* this dmac does not support over 4G */
 232         uint32_t dma_addr;
 233         int fill_stages, dma_ch, stage;
 234         enum snd_ps3_ch ch;
 235         uint32_t ch0_kick_event = 0; /* initialize to mute gcc */
 236         void *start_vaddr;
 237         unsigned long irqsave;
 238         int silent = 0;
 239
 240         switch (filltype) {
 241         case SND_PS3_DMA_FILLTYPE_SILENT_FIRSTFILL:
 242                 silent = 1;
 243                 /* intentionally fall thru */
 244         case SND_PS3_DMA_FILLTYPE_FIRSTFILL:
 245                 ch0_kick_event = PS3_AUDIO_KICK_EVENT_ALWAYS;
 246                 break;
 247
 248         case SND_PS3_DMA_FILLTYPE_SILENT_RUNNING:
 249                 silent = 1;
 250                 /* intentionally fall thru */
 251         case SND_PS3_DMA_FILLTYPE_RUNNING:
 252                 ch0_kick_event = PS3_AUDIO_KICK_EVENT_SERIALOUT0_EMPTY;
 253                 break;
 254         }
 255
 256         snd_ps3_verify_dma_stop(card, 700, 0);
 257         fill_stages = 4;
 258         spin_lock_irqsave(&card->dma_lock, irqsave);
 259         for (ch = 0; ch < 2; ch++) {
 260                 start_vaddr = card->dma_next_transfer_vaddr[0];
 261                 for (stage = 0; stage < fill_stages; stage++) {
 262                         dma_ch = stage * 2 + ch;
 263                         if (silent)
 264                                 dma_addr = card->null_buffer_start_dma_addr;
 265                         else
 266                                 dma_addr =
 267                                 v_to_bus(card,
 268                                          card->dma_next_transfer_vaddr[ch],
 269                                          ch);
 270
 271                         write_reg(PS3_AUDIO_SOURCE(dma_ch),
 272                                   (PS3_AUDIO_SOURCE_TARGET_SYSTEM_MEMORY |
 273                                    dma_addr));
 274
 275                         /* dst: fixed to 3wire#0 */
 276                         if (ch == 0)
 277                                 write_reg(PS3_AUDIO_DEST(dma_ch),
 278                                           (PS3_AUDIO_DEST_TARGET_AUDIOFIFO |
 279                                            PS3_AUDIO_AO_3W_LDATA(0)));
 280                         else
 281                                 write_reg(PS3_AUDIO_DEST(dma_ch),
 282                                           (PS3_AUDIO_DEST_TARGET_AUDIOFIFO |
 283                                            PS3_AUDIO_AO_3W_RDATA(0)));
 284
 285                         /* count always 1 DMA block (1/2 stage = 128 bytes) */
 286                         write_reg(PS3_AUDIO_DMASIZE(dma_ch), 0);
 287                         /* bump pointer if needed */
 288                         if (!silent)
 289                                 snd_ps3_bump_buffer(card, ch,
 290                                                     PS3_AUDIO_DMAC_BLOCK_SIZE,
 291                                                     stage);
 292
 293                         /* kick event  */
 294                         if (dma_ch == 0)
 295                                 write_reg(PS3_AUDIO_KICK(dma_ch),
 296                                           ch0_kick_event);
 297                         else
 298                                 write_reg(PS3_AUDIO_KICK(dma_ch),
 299                                           PS3_AUDIO_KICK_EVENT_AUDIO_DMA(dma_ch
 300                                                                          - 1) |
 301                                           PS3_AUDIO_KICK_REQUEST);
 302                 }
 303         }
 304         /* ensure the hardware sees the change */
 305         wmb();
 306         spin_unlock_irqrestore(&card->dma_lock, irqsave);
 307
 308         return 0;
 309 }
 310
 311 /*
 312  * Interrupt handler
 313  */
 314 static irqreturn_t snd_ps3_interrupt(int irq, void *dev_id)
 315 {
 316
 317         uint32_t port_intr;
 318         int underflow_occured = 0;
 319         struct snd_ps3_card_info *card = dev_id;
 320
 321         if (!card->running) {
 322                 update_reg(PS3_AUDIO_AX_IS, 0);
 323                 update_reg(PS3_AUDIO_INTR_0, 0);
 324                 return IRQ_HANDLED;
 325         }
 326
 327         port_intr = read_reg(PS3_AUDIO_AX_IS);
 328         /*
 329          *serial buffer empty detected (every 4 times),
 330          *program next dma and kick it
 331          */
 332         if (port_intr & PS3_AUDIO_AX_IE_ASOBEIE(0)) {
 333                 write_reg(PS3_AUDIO_AX_IS, PS3_AUDIO_AX_IE_ASOBEIE(0));
 334                 if (port_intr & PS3_AUDIO_AX_IE_ASOBUIE(0)) {
 335                         write_reg(PS3_AUDIO_AX_IS, port_intr);
 336                         underflow_occured = 1;
 337                 }
 338                 if (card->silent) {
 339                         /* we are still in silent time */
 340                         snd_ps3_program_dma(card,
 341                                 (underflow_occured) ?
 342                                 SND_PS3_DMA_FILLTYPE_SILENT_FIRSTFILL :
 343                                 SND_PS3_DMA_FILLTYPE_SILENT_RUNNING);
 344                         snd_ps3_kick_dma(card);
 345                         card->silent--;
 346                 } else {
 347                         snd_ps3_program_dma(card,
 348                                 (underflow_occured) ?
 349                                 SND_PS3_DMA_FILLTYPE_FIRSTFILL :
 350                                 SND_PS3_DMA_FILLTYPE_RUNNING);
 351                         snd_ps3_kick_dma(card);
 352                         snd_pcm_period_elapsed(card->substream);
 353                 }
 354         } else if (port_intr & PS3_AUDIO_AX_IE_ASOBUIE(0)) {
 355                 write_reg(PS3_AUDIO_AX_IS, PS3_AUDIO_AX_IE_ASOBUIE(0));
 356                 /*
 357                  * serial out underflow, but buffer empty not detected.
 358                  * in this case, fill fifo with 0 to recover.  After
 359                  * filling dummy data, serial automatically start to
 360                  * consume them and then will generate normal buffer
 361                  * empty interrupts.
 362                  * If both buffer underflow and buffer empty are occurred,
 363                  * it is better to do nomal data transfer than empty one
 364                  */
 365                 snd_ps3_program_dma(card,
 366                                     SND_PS3_DMA_FILLTYPE_SILENT_FIRSTFILL);
 367                 snd_ps3_kick_dma(card);
 368                 snd_ps3_program_dma(card,
 369                                     SND_PS3_DMA_FILLTYPE_SILENT_FIRSTFILL);
 370                 snd_ps3_kick_dma(card);
 371         }
 372         /* clear interrupt cause */
 373         return IRQ_HANDLED;
 374 };
 375
 376 /*
 377  * audio mute on/off
 378  * mute_on : 0 output enabled
 379  *           1 mute
 380  */
 381 static int snd_ps3_mute(int mute_on)
 382 {
 383         return ps3av_audio_mute(mute_on);
 384 }
 385
 386 /*
 387  * av setting
 388  * NOTE: calling this function may generate audio interrupt.
 389  */
 390 static int snd_ps3_change_avsetting(struct snd_ps3_card_info *card)
 391 {
 392         int ret, retries, i;
 393         pr_debug("%s: start\n", __func__);
 394
 395         ret = ps3av_set_audio_mode(card->avs.avs_audio_ch,
 396                                   card->avs.avs_audio_rate,
 397                                   card->avs.avs_audio_width,
 398                                   card->avs.avs_audio_format,
 399                                   card->avs.avs_audio_source);
 400         /*
 401          * Reset the following unwanted settings:
 402          */
 403
 404         /* disable all 3wire buffers */
 405         update_mask_reg(PS3_AUDIO_AO_3WMCTRL,
 406                         ~(PS3_AUDIO_AO_3WMCTRL_ASOEN(0) |
 407                           PS3_AUDIO_AO_3WMCTRL_ASOEN(1) |
 408                           PS3_AUDIO_AO_3WMCTRL_ASOEN(2) |
 409                           PS3_AUDIO_AO_3WMCTRL_ASOEN(3)),
 410                         0);
 411         wmb();  /* ensure the hardware sees the change */
 412         /* wait for actually stopped */
 413         retries = 1000;
 414         while ((read_reg(PS3_AUDIO_AO_3WMCTRL) &
 415                 (PS3_AUDIO_AO_3WMCTRL_ASORUN(0) |
 416                  PS3_AUDIO_AO_3WMCTRL_ASORUN(1) |
 417                  PS3_AUDIO_AO_3WMCTRL_ASORUN(2) |
 418                  PS3_AUDIO_AO_3WMCTRL_ASORUN(3))) &&
 419                --retries) {
 420                 udelay(1);
 421         }
 422
 423         /* reset buffer pointer */
 424         for (i = 0; i < 4; i++) {
 425                 update_reg(PS3_AUDIO_AO_3WCTRL(i),
 426                            PS3_AUDIO_AO_3WCTRL_ASOBRST_RESET);
 427                 udelay(10);
 428         }
 429         wmb(); /* ensure the hardware actually start resetting */
 430
 431         /* enable 3wire#0 buffer */
 432         update_reg(PS3_AUDIO_AO_3WMCTRL, PS3_AUDIO_AO_3WMCTRL_ASOEN(0));
 433
 434
 435         /* In 24bit mode,ALSA inserts a zero byte at first byte of per sample */
 436         update_mask_reg(PS3_AUDIO_AO_3WCTRL(0),
 437                         ~PS3_AUDIO_AO_3WCTRL_ASODF,
 438                         PS3_AUDIO_AO_3WCTRL_ASODF_LSB);
 439         update_mask_reg(PS3_AUDIO_AO_SPDCTRL(0),
 440                         ~PS3_AUDIO_AO_SPDCTRL_SPODF,
 441                         PS3_AUDIO_AO_SPDCTRL_SPODF_LSB);
 442         /* ensure all the setting above is written back to register */
 443         wmb();
 444         /* avsetting driver altered AX_IE, caller must reset it if you want */
 445         pr_debug("%s: end\n", __func__);
 446         return ret;
 447 }
 448
 449 /*
 450  *  set sampling rate according to the substream
 451  */
 452 static int snd_ps3_set_avsetting(struct snd_pcm_substream *substream)
 453 {
 454         struct snd_ps3_card_info *card = snd_pcm_substream_chip(substream);
 455         struct snd_ps3_avsetting_info avs;
 456         int ret;
 457
 458         avs = card->avs;
 459
 460         pr_debug("%s: called freq=%d width=%d\n", __func__,
 461                  substream->runtime->rate,
 462                  snd_pcm_format_width(substream->runtime->format));
 463
 464         pr_debug("%s: before freq=%d width=%d\n", __func__,
 465                  card->avs.avs_audio_rate, card->avs.avs_audio_width);
 466
 467         /* sample rate */
 468         switch (substream->runtime->rate) {
 469         case 44100:
 470                 avs.avs_audio_rate = PS3AV_CMD_AUDIO_FS_44K;
 471                 break;
 472         case 48000:
 473                 avs.avs_audio_rate = PS3AV_CMD_AUDIO_FS_48K;
 474                 break;
 475         case 88200:
 476                 avs.avs_audio_rate = PS3AV_CMD_AUDIO_FS_88K;
 477                 break;
 478         case 96000:
 479                 avs.avs_audio_rate = PS3AV_CMD_AUDIO_FS_96K;
 480                 break;
 481         default:
 482                 pr_info("%s: invalid rate %d\n", __func__,
 483                         substream->runtime->rate);
 484                 return 1;
 485         }
 486
 487         /* width */
 488         switch (snd_pcm_format_width(substream->runtime->format)) {
 489         case 16:
 490                 avs.avs_audio_width = PS3AV_CMD_AUDIO_WORD_BITS_16;
 491                 break;
 492         case 24:
 493                 avs.avs_audio_width = PS3AV_CMD_AUDIO_WORD_BITS_24;
 494                 break;
 495         default:
 496                 pr_info("%s: invalid width %d\n", __func__,
 497                         snd_pcm_format_width(substream->runtime->format));
 498                 return 1;
 499         }
 500
 501         memcpy(avs.avs_cs_info, ps3av_mode_cs_info, 8);
 502
 503         if (memcmp(&card->avs, &avs, sizeof(avs))) {
 504                 pr_debug("%s: after freq=%d width=%d\n", __func__,
 505                          card->avs.avs_audio_rate, card->avs.avs_audio_width);
 506
 507                 card->avs = avs;
 508                 snd_ps3_change_avsetting(card);
 509                 ret = 0;
 510         } else
 511                 ret = 1;
 512
 513         /* check CS non-audio bit and mute accordingly */
 514         if (avs.avs_cs_info[0] & 0x02)
 515                 ps3av_audio_mute_analog(1); /* mute if non-audio */
 516         else
 517                 ps3av_audio_mute_analog(0);
 518
 519         return ret;
 520 }
 521
 522 /*
 523  * PCM operators
 524  */
 525 static int snd_ps3_pcm_open(struct snd_pcm_substream *substream)
 526 {
 527         struct snd_pcm_runtime *runtime = substream->runtime;
 528         struct snd_ps3_card_info *card = snd_pcm_substream_chip(substream);
 529         int pcm_index;
 530
 531         pcm_index = substream->pcm->device;
 532         /* to retrieve substream/runtime in interrupt handler */
 533         card->substream = substream;
 534
 535         runtime->hw = snd_ps3_pcm_hw;
 536
 537         card->start_delay = snd_ps3_start_delay;
 538
 539         /* mute off */
 540         snd_ps3_mute(0); /* this function sleep */
 541
 542         snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
 543                                    PS3_AUDIO_FIFO_STAGE_SIZE * 4 * 2);
 544         return 0;
 545 };
 546
 547 static int snd_ps3_pcm_close(struct snd_pcm_substream *substream)
 548 {
 549         /* mute on */
 550         snd_ps3_mute(1);
 551         return 0;
 552 };
 553
 554 static int snd_ps3_pcm_hw_params(struct snd_pcm_substream *substream,
 555                                  struct snd_pcm_hw_params *hw_params)
 556 {
 557         size_t size;
 558
 559         /* alloc transport buffer */
 560         size = params_buffer_bytes(hw_params);
 561         snd_pcm_lib_malloc_pages(substream, size);
 562         return 0;
 563 };
 564
 565 static int snd_ps3_pcm_hw_free(struct snd_pcm_substream *substream)
 566 {
 567         int ret;
 568         ret = snd_pcm_lib_free_pages(substream);
 569         return ret;
 570 };
 571
 572 static int snd_ps3_delay_to_bytes(struct snd_pcm_substream *substream,
 573                                   unsigned int delay_ms)
 574 {
 575         int ret;
 576         int rate ;
 577
 578         rate = substream->runtime->rate;
 579         ret = snd_pcm_format_size(substream->runtime->format,
 580                                   rate * delay_ms / 1000)
 581                 * substream->runtime->channels;
 582
 583         pr_debug("%s: time=%d rate=%d bytes=%ld, frames=%d, ret=%d\n",
 584                  __func__,
 585                  delay_ms,
 586                  rate,
 587                  snd_pcm_format_size(substream->runtime->format, rate),
 588                  rate * delay_ms / 1000,
 589                  ret);
 590
 591         return ret;
 592 };
 593
 594 static int snd_ps3_pcm_prepare(struct snd_pcm_substream *substream)
 595 {
 596         struct snd_pcm_runtime *runtime = substream->runtime;
 597         struct snd_ps3_card_info *card = snd_pcm_substream_chip(substream);
 598         unsigned long irqsave;
 599
 600         if (!snd_ps3_set_avsetting(substream)) {
 601                 /* some parameter changed */
 602                 write_reg(PS3_AUDIO_AX_IE,
 603                           PS3_AUDIO_AX_IE_ASOBEIE(0) |
 604                           PS3_AUDIO_AX_IE_ASOBUIE(0));
 605                 /*
 606                  * let SPDIF device re-lock with SPDIF signal,
 607                  * start with some silence
 608                  */
 609                 card->silent = snd_ps3_delay_to_bytes(substream,
 610                                                       card->start_delay) /
 611                         (PS3_AUDIO_FIFO_STAGE_SIZE * 4); /* every 4 times */
 612         }
 613
 614         /* restart ring buffer pointer */
 615         spin_lock_irqsave(&card->dma_lock, irqsave);
 616         {
 617                 card->dma_buffer_size = runtime->dma_bytes;
 618
 619                 card->dma_last_transfer_vaddr[SND_PS3_CH_L] =
 620                         card->dma_next_transfer_vaddr[SND_PS3_CH_L] =
 621                         card->dma_start_vaddr[SND_PS3_CH_L] =
 622                         runtime->dma_area;
 623                 card->dma_start_bus_addr[SND_PS3_CH_L] = runtime->dma_addr;
 624
 625                 card->dma_last_transfer_vaddr[SND_PS3_CH_R] =
 626                         card->dma_next_transfer_vaddr[SND_PS3_CH_R] =
 627                         card->dma_start_vaddr[SND_PS3_CH_R] =
 628                         runtime->dma_area + (runtime->dma_bytes / 2);
 629                 card->dma_start_bus_addr[SND_PS3_CH_R] =
 630                         runtime->dma_addr + (runtime->dma_bytes / 2);
 631
 632                 pr_debug("%s: vaddr=%p bus=%#llx\n", __func__,
 633                          card->dma_start_vaddr[SND_PS3_CH_L],
 634                          card->dma_start_bus_addr[SND_PS3_CH_L]);
 635
 636         }
 637         spin_unlock_irqrestore(&card->dma_lock, irqsave);
 638
 639         /* ensure the hardware sees the change */
 640         mb();
 641
 642         return 0;
 643 };
 644
 645 static int snd_ps3_pcm_trigger(struct snd_pcm_substream *substream,
 646                                int cmd)
 647 {
 648         struct snd_ps3_card_info *card = snd_pcm_substream_chip(substream);
 649         int ret = 0;
 650
 651         switch (cmd) {
 652         case SNDRV_PCM_TRIGGER_START:
 653                 /* clear outstanding interrupts  */
 654                 update_reg(PS3_AUDIO_AX_IS, 0);
 655
 656                 spin_lock(&card->dma_lock);
 657                 {
 658                         card->running = 1;
 659                 }
 660                 spin_unlock(&card->dma_lock);
 661
 662                 snd_ps3_program_dma(card,
 663                                     SND_PS3_DMA_FILLTYPE_SILENT_FIRSTFILL);
 664                 snd_ps3_kick_dma(card);
 665                 while (read_reg(PS3_AUDIO_KICK(7)) &
 666                        PS3_AUDIO_KICK_STATUS_MASK) {
 667                         udelay(1);
 668                 }
 669                 snd_ps3_program_dma(card, SND_PS3_DMA_FILLTYPE_SILENT_RUNNING);
 670                 snd_ps3_kick_dma(card);
 671                 break;
 672
 673         case SNDRV_PCM_TRIGGER_STOP:
 674                 spin_lock(&card->dma_lock);
 675                 {
 676                         card->running = 0;
 677                 }
 678                 spin_unlock(&card->dma_lock);
 679                 snd_ps3_wait_for_dma_stop(card);
 680                 break;
 681         default:
 682                 break;
 683
 684         }
 685
 686         return ret;
 687 };
 688
 689 /*
 690  * report current pointer
 691  */
 692 static snd_pcm_uframes_t snd_ps3_pcm_pointer(
 693         struct snd_pcm_substream *substream)
 694 {
 695         struct snd_ps3_card_info *card = snd_pcm_substream_chip(substream);
 696         size_t bytes;
 697         snd_pcm_uframes_t ret;
 698
 699         spin_lock(&card->dma_lock);
 700         {
 701                 bytes = (size_t)(card->dma_last_transfer_vaddr[SND_PS3_CH_L] -
 702                                  card->dma_start_vaddr[SND_PS3_CH_L]);
 703         }
 704         spin_unlock(&card->dma_lock);
 705
 706         ret = bytes_to_frames(substream->runtime, bytes * 2);
 707
 708         return ret;
 709 };
 710
 711 /*
 712  * SPDIF status bits controls
 713  */
 714 static int snd_ps3_spdif_mask_info(struct snd_kcontrol *kcontrol,
 715                                    struct snd_ctl_elem_info *uinfo)
 716 {
 717         uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
 718         uinfo->count = 1;
 719         return 0;
 720 }
 721
 722 /* FIXME: ps3av_set_audio_mode() assumes only consumer mode */
 723 static int snd_ps3_spdif_cmask_get(struct snd_kcontrol *kcontrol,
 724                                    struct snd_ctl_elem_value *ucontrol)
 725 {
 726         memset(ucontrol->value.iec958.status, 0xff, 8);
 727         return 0;
 728 }
 729
 730 static int snd_ps3_spdif_pmask_get(struct snd_kcontrol *kcontrol,
 731                                    struct snd_ctl_elem_value *ucontrol)
 732 {
 733         return 0;
 734 }
 735
 736 static int snd_ps3_spdif_default_get(struct snd_kcontrol *kcontrol,
 737                                      struct snd_ctl_elem_value *ucontrol)
 738 {
 739         memcpy(ucontrol->value.iec958.status, ps3av_mode_cs_info, 8);
 740         return 0;
 741 }
 742
 743 static int snd_ps3_spdif_default_put(struct snd_kcontrol *kcontrol,
 744                                      struct snd_ctl_elem_value *ucontrol)
 745 {
 746         if (memcmp(ps3av_mode_cs_info, ucontrol->value.iec958.status, 8)) {
 747                 memcpy(ps3av_mode_cs_info, ucontrol->value.iec958.status, 8);
 748                 return 1;
 749         }
 750         return 0;
 751 }
 752
 753 static struct snd_kcontrol_new spdif_ctls[] = {
 754         {
 755                 .access = SNDRV_CTL_ELEM_ACCESS_READ,
 756                 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
 757                 .name = SNDRV_CTL_NAME_IEC958("", PLAYBACK, CON_MASK),
 758                 .info = snd_ps3_spdif_mask_info,
 759                 .get = snd_ps3_spdif_cmask_get,
 760         },
 761         {
 762                 .access = SNDRV_CTL_ELEM_ACCESS_READ,
 763                 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
 764                 .name = SNDRV_CTL_NAME_IEC958("", PLAYBACK, PRO_MASK),
 765                 .info = snd_ps3_spdif_mask_info,
 766                 .get = snd_ps3_spdif_pmask_get,
 767         },
 768         {
 769                 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
 770                 .name = SNDRV_CTL_NAME_IEC958("", PLAYBACK, DEFAULT),
 771                 .info = snd_ps3_spdif_mask_info,
 772                 .get = snd_ps3_spdif_default_get,
 773                 .put = snd_ps3_spdif_default_put,
 774         },
 775 };
 776
 777 static struct snd_pcm_ops snd_ps3_pcm_spdif_ops = {
 778         .open = snd_ps3_pcm_open,
 779         .close = snd_ps3_pcm_close,
 780         .ioctl = snd_pcm_lib_ioctl,
 781         .hw_params = snd_ps3_pcm_hw_params,
 782         .hw_free = snd_ps3_pcm_hw_free,
 783         .prepare = snd_ps3_pcm_prepare,
 784         .trigger = snd_ps3_pcm_trigger,
 785         .pointer = snd_ps3_pcm_pointer,
 786 };
 787
 788
 789 static int snd_ps3_map_mmio(void)
 790 {
 791         the_card.mapped_mmio_vaddr =
 792                 ioremap(the_card.ps3_dev->m_region->bus_addr,
 793                         the_card.ps3_dev->m_region->len);
 794
 795         if (!the_card.mapped_mmio_vaddr) {
 796                 pr_info("%s: ioremap 0 failed p=%#lx l=%#lx \n",
 797                        __func__, the_card.ps3_dev->m_region->lpar_addr,
 798                        the_card.ps3_dev->m_region->len);
 799                 return -ENXIO;
 800         }
 801
 802         return 0;
 803 };
 804
 805 static void snd_ps3_unmap_mmio(void)
 806 {
 807         iounmap(the_card.mapped_mmio_vaddr);
 808         the_card.mapped_mmio_vaddr = NULL;
 809 }
 810
 811 static int snd_ps3_allocate_irq(void)
 812 {
 813         int ret;
 814         u64 lpar_addr, lpar_size;
 815         u64 __iomem *mapped;
 816
 817         /* FIXME: move this to device_init (H/W probe) */
 818
 819         /* get irq outlet */
 820         ret = lv1_gpu_device_map(1, &lpar_addr, &lpar_size);
 821         if (ret) {
 822                 pr_info("%s: device map 1 failed %d\n", __func__,
 823                         ret);
 824                 return -ENXIO;
 825         }
 826
 827         mapped = ioremap(lpar_addr, lpar_size);
 828         if (!mapped) {
 829                 pr_info("%s: ioremap 1 failed \n", __func__);
 830                 return -ENXIO;
 831         }
 832
 833         the_card.audio_irq_outlet = in_be64(mapped);
 834
 835         iounmap(mapped);
 836         ret = lv1_gpu_device_unmap(1);
 837         if (ret)
 838                 pr_info("%s: unmap 1 failed\n", __func__);
 839
 840         /* irq */
 841         ret = ps3_irq_plug_setup(PS3_BINDING_CPU_ANY,
 842                                  the_card.audio_irq_outlet,
 843                                  &the_card.irq_no);
 844         if (ret) {
 845                 pr_info("%s:ps3_alloc_irq failed (%d)\n", __func__, ret);
 846                 return ret;
 847         }
 848
 849         ret = request_irq(the_card.irq_no, snd_ps3_interrupt, 0,
 850                           SND_PS3_DRIVER_NAME, &the_card);
 851         if (ret) {
 852                 pr_info("%s: request_irq failed (%d)\n", __func__, ret);
 853                 goto cleanup_irq;
 854         }
 855
 856         return 0;
 857
 858  cleanup_irq:
 859         ps3_irq_plug_destroy(the_card.irq_no);
 860         return ret;
 861 };
 862
 863 static void snd_ps3_free_irq(void)
 864 {
 865         free_irq(the_card.irq_no, &the_card);
 866         ps3_irq_plug_destroy(the_card.irq_no);
 867 }
 868
 869 static void snd_ps3_audio_set_base_addr(uint64_t ioaddr_start)
 870 {
 871         uint64_t val;
 872         int ret;
 873
 874         val = (ioaddr_start & (0x0fUL << 32)) >> (32 - 20) |
 875                 (0x03UL << 24) |
 876                 (0x0fUL << 12) |
 877                 (PS3_AUDIO_IOID);
 878
 879         ret = lv1_gpu_attribute(0x100, 0x007, val);
 880         if (ret)
 881                 pr_info("%s: gpu_attribute failed %d\n", __func__,
 882                         ret);
 883 }
 884
 885 static void snd_ps3_audio_fixup(struct snd_ps3_card_info *card)
 886 {
 887         /*
 888          * avsetting driver seems to never change the followings
 889          * so, init them here once
 890          */
 891
 892         /* no dma interrupt needed */
 893         write_reg(PS3_AUDIO_INTR_EN_0, 0);
 894
 895         /* use every 4 buffer empty interrupt */
 896         update_mask_reg(PS3_AUDIO_AX_IC,
 897                         PS3_AUDIO_AX_IC_AASOIMD_MASK,
 898                         PS3_AUDIO_AX_IC_AASOIMD_EVERY4);
 899
 900         /* enable 3wire clocks */
 901         update_mask_reg(PS3_AUDIO_AO_3WMCTRL,
 902                         ~(PS3_AUDIO_AO_3WMCTRL_ASOBCLKD_DISABLED |
 903                           PS3_AUDIO_AO_3WMCTRL_ASOLRCKD_DISABLED),
 904                         0);
 905         update_reg(PS3_AUDIO_AO_3WMCTRL,
 906                    PS3_AUDIO_AO_3WMCTRL_ASOPLRCK_DEFAULT);
 907 }
 908
 909 static int snd_ps3_init_avsetting(struct snd_ps3_card_info *card)
 910 {
 911         int ret;
 912         pr_debug("%s: start\n", __func__);
 913         card->avs.avs_audio_ch = PS3AV_CMD_AUDIO_NUM_OF_CH_2;
 914         card->avs.avs_audio_rate = PS3AV_CMD_AUDIO_FS_48K;
 915         card->avs.avs_audio_width = PS3AV_CMD_AUDIO_WORD_BITS_16;
 916         card->avs.avs_audio_format = PS3AV_CMD_AUDIO_FORMAT_PCM;
 917         card->avs.avs_audio_source = PS3AV_CMD_AUDIO_SOURCE_SERIAL;
 918         memcpy(card->avs.avs_cs_info, ps3av_mode_cs_info, 8);
 919
 920         ret = snd_ps3_change_avsetting(card);
 921
 922         snd_ps3_audio_fixup(card);
 923
 924         /* to start to generate SPDIF signal, fill data */
 925         snd_ps3_program_dma(card, SND_PS3_DMA_FILLTYPE_SILENT_FIRSTFILL);
 926         snd_ps3_kick_dma(card);
 927         pr_debug("%s: end\n", __func__);
 928         return ret;
 929 }
 930
 931 static int snd_ps3_driver_probe(struct ps3_system_bus_device *dev)
 932 {
 933         int i, ret;
 934         u64 lpar_addr, lpar_size;
 935
 936         if (WARN_ON(!firmware_has_feature(FW_FEATURE_PS3_LV1)))
 937                 return -ENODEV;
 938         if (WARN_ON(dev->match_id != PS3_MATCH_ID_SOUND))
 939                 return -ENODEV;
 940
 941         the_card.ps3_dev = dev;
 942
 943         ret = ps3_open_hv_device(dev);
 944
 945         if (ret)
 946                 return -ENXIO;
 947
 948         /* setup MMIO */
 949         ret = lv1_gpu_device_map(2, &lpar_addr, &lpar_size);
 950         if (ret) {
 951                 pr_info("%s: device map 2 failed %d\n", __func__, ret);
 952                 goto clean_open;
 953         }
 954         ps3_mmio_region_init(dev, dev->m_region, lpar_addr, lpar_size,
 955                 PAGE_SHIFT);
 956
 957         ret = snd_ps3_map_mmio();
 958         if (ret)
 959                 goto clean_dev_map;
 960
 961         /* setup DMA area */
 962         ps3_dma_region_init(dev, dev->d_region,
 963                             PAGE_SHIFT, /* use system page size */
 964                             0, /* dma type; not used */
 965                             NULL,
 966                             _ALIGN_UP(SND_PS3_DMA_REGION_SIZE, PAGE_SIZE));
 967         dev->d_region->ioid = PS3_AUDIO_IOID;
 968
 969         ret = ps3_dma_region_create(dev->d_region);
 970         if (ret) {
 971                 pr_info("%s: region_create\n", __func__);
 972                 goto clean_mmio;
 973         }
 974
 975         snd_ps3_audio_set_base_addr(dev->d_region->bus_addr);
 976
 977         /* CONFIG_SND_PS3_DEFAULT_START_DELAY */
 978         the_card.start_delay = snd_ps3_start_delay;
 979
 980         /* irq */
 981         if (snd_ps3_allocate_irq()) {
 982                 ret = -ENXIO;
 983                 goto clean_dma_region;
 984         }
 985
 986         /* create card instance */
 987         ret = snd_card_create(index, id, THIS_MODULE, 0, &the_card.card);
 988         if (ret < 0)
 989                 goto clean_irq;
 990
 991         strcpy(the_card.card->driver, "PS3");
 992         strcpy(the_card.card->shortname, "PS3");
 993         strcpy(the_card.card->longname, "PS3 sound");
 994
 995         /* create control elements */
 996         for (i = 0; i < ARRAY_SIZE(spdif_ctls); i++) {
 997                 ret = snd_ctl_add(the_card.card,
 998                                   snd_ctl_new1(&spdif_ctls[i], &the_card));
 999                 if (ret < 0)
1000                         goto clean_card;
1001         }
1002
1003         /* create PCM devices instance */
1004         /* NOTE:this driver works assuming pcm:substream = 1:1 */
1005         ret = snd_pcm_new(the_card.card,
1006                           "SPDIF",
1007                           0, /* instance index, will be stored pcm.device*/
1008                           1, /* output substream */
1009                           0, /* input substream */
1010                           &(the_card.pcm));
1011         if (ret)
1012                 goto clean_card;
1013
1014         the_card.pcm->private_data = &the_card;
1015         strcpy(the_card.pcm->name, "SPDIF");
1016
1017         /* set pcm ops */
1018         snd_pcm_set_ops(the_card.pcm, SNDRV_PCM_STREAM_PLAYBACK,
1019                         &snd_ps3_pcm_spdif_ops);
1020
1021         the_card.pcm->info_flags = SNDRV_PCM_INFO_NONINTERLEAVED;
1022         /* pre-alloc PCM DMA buffer*/
1023         ret = snd_pcm_lib_preallocate_pages_for_all(the_card.pcm,
1024                                         SNDRV_DMA_TYPE_DEV,
1025                                         &dev->core,
1026                                         SND_PS3_PCM_PREALLOC_SIZE,
1027                                         SND_PS3_PCM_PREALLOC_SIZE);
1028         if (ret < 0) {
1029                 pr_info("%s: prealloc failed\n", __func__);
1030                 goto clean_card;
1031         }
1032
1033         /*
1034          * allocate null buffer
1035          * its size should be lager than PS3_AUDIO_FIFO_STAGE_SIZE * 2
1036          * PAGE_SIZE is enogh
1037          */
1038         the_card.null_buffer_start_vaddr =
1039                 dma_alloc_coherent(&the_card.ps3_dev->core,
1040                                    PAGE_SIZE,
1041                                    &the_card.null_buffer_start_dma_addr,
1042                                    GFP_KERNEL);
1043         if (!the_card.null_buffer_start_vaddr) {
1044                 pr_info("%s: nullbuffer alloc failed\n", __func__);
1045                 ret = -ENOMEM;
1046                 goto clean_preallocate;
1047         }
1048         pr_debug("%s: null vaddr=%p dma=%#llx\n", __func__,
1049                  the_card.null_buffer_start_vaddr,
1050                  the_card.null_buffer_start_dma_addr);
1051         /* set default sample rate/word width */
1052         snd_ps3_init_avsetting(&the_card);
1053
1054         /* register the card */
1055         snd_card_set_dev(the_card.card, &dev->core);
1056         ret = snd_card_register(the_card.card);
1057         if (ret < 0)
1058                 goto clean_dma_map;
1059
1060         pr_info("%s started. start_delay=%dms\n",
1061                 the_card.card->longname, the_card.start_delay);
1062         return 0;
1063
1064 clean_dma_map:
1065         dma_free_coherent(&the_card.ps3_dev->core,
1066                           PAGE_SIZE,
1067                           the_card.null_buffer_start_vaddr,
1068                           the_card.null_buffer_start_dma_addr);
1069 clean_preallocate:
1070         snd_pcm_lib_preallocate_free_for_all(the_card.pcm);
1071 clean_card:
1072         snd_card_free(the_card.card);
1073 clean_irq:
1074         snd_ps3_free_irq();
1075 clean_dma_region:
1076         ps3_dma_region_free(dev->d_region);
1077 clean_mmio:
1078         snd_ps3_unmap_mmio();
1079 clean_dev_map:
1080         lv1_gpu_device_unmap(2);
1081 clean_open:
1082         ps3_close_hv_device(dev);
1083         /*
1084          * there is no destructor function to pcm.
1085          * midlayer automatically releases if the card removed
1086          */
1087         return ret;
1088 }; /* snd_ps3_probe */
1089
1090 /* called when module removal */
1091 static int snd_ps3_driver_remove(struct ps3_system_bus_device *dev)
1092 {
1093         int ret;
1094         pr_info("%s:start id=%d\n", __func__,  dev->match_id);
1095         if (dev->match_id != PS3_MATCH_ID_SOUND)
1096                 return -ENXIO;
1097
1098         /*
1099          * ctl and preallocate buffer will be freed in
1100          * snd_card_free
1101          */
1102         ret = snd_card_free(the_card.card);
1103         if (ret)
1104                 pr_info("%s: ctl freecard=%d\n", __func__, ret);
1105
1106         dma_free_coherent(&dev->core,
1107                           PAGE_SIZE,
1108                           the_card.null_buffer_start_vaddr,
1109                           the_card.null_buffer_start_dma_addr);
1110
1111         ps3_dma_region_free(dev->d_region);
1112
1113         snd_ps3_free_irq();
1114         snd_ps3_unmap_mmio();
1115
1116         lv1_gpu_device_unmap(2);
1117         ps3_close_hv_device(dev);
1118         pr_info("%s:end id=%d\n", __func__, dev->match_id);
1119         return 0;
1120 } /* snd_ps3_remove */
1121
1122 static struct ps3_system_bus_driver snd_ps3_bus_driver_info = {
1123         .match_id = PS3_MATCH_ID_SOUND,
1124         .probe = snd_ps3_driver_probe,
1125         .remove = snd_ps3_driver_remove,
1126         .shutdown = snd_ps3_driver_remove,
1127         .core = {
1128                 .name = SND_PS3_DRIVER_NAME,
1129                 .owner = THIS_MODULE,
1130         },
1131 };
1132
1133
1134 /*
1135  * module/subsystem initialize/terminate
1136  */
1137 static int __init snd_ps3_init(void)
1138 {
1139         int ret;
1140
1141         if (!firmware_has_feature(FW_FEATURE_PS3_LV1))
1142                 return -ENXIO;
1143
1144         memset(&the_card, 0, sizeof(the_card));
1145         spin_lock_init(&the_card.dma_lock);
1146
1147         /* register systembus DRIVER, this calls our probe() func */
1148         ret = ps3_system_bus_driver_register(&snd_ps3_bus_driver_info);
1149
1150         return ret;
1151 }
1152 module_init(snd_ps3_init);
1153
1154 static void __exit snd_ps3_exit(void)
1155 {
1156         ps3_system_bus_driver_unregister(&snd_ps3_bus_driver_info);
1157 }
1158 module_exit(snd_ps3_exit);
1159
1160 MODULE_LICENSE("GPL v2");
1161 MODULE_DESCRIPTION("PS3 sound driver");
1162 MODULE_AUTHOR("Sony Computer Entertainment Inc.");
1163 MODULE_ALIAS(PS3_MODULE_ALIAS_SOUND);