sound/drivers/ml403-ac97cr.c

   1 /*
   2  * ALSA driver for Xilinx ML403 AC97 Controller Reference
   3  *   IP: opb_ac97_controller_ref_v1_00_a (EDK 8.1i)
   4  *   IP: opb_ac97_controller_ref_v1_00_a (EDK 9.1i)
   5  *
   6  *  Copyright (c) by 2007  Joachim Foerster <JOFT@gmx.de>
   7  *
   8  *   This program is free software; you can redistribute it and/or modify
   9  *   it under the terms of the GNU General Public License as published by
  10  *   the Free Software Foundation; either version 2 of the License, or
  11  *   (at your option) any later version.
  12  *
  13  *   This program is distributed in the hope that it will be useful,
  14  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  *   GNU General Public License for more details.
  17  *
  18  *   You should have received a copy of the GNU General Public License
  19  *   along with this program; if not, write to the Free Software
  20  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  21  *
  22  */
  23
  24 /* Some notes / status of this driver:
  25  *
  26  * - Don't wonder about some strange implementations of things - especially the
  27  * (heavy) shadowing of codec registers, with which I tried to reduce read
  28  * accesses to a minimum, because after a variable amount of accesses, the AC97
  29  * controller doesn't raise the register access finished bit anymore ...
  30  *
  31  * - Playback support seems to be pretty stable - no issues here.
  32  * - Capture support "works" now, too. Overruns don't happen any longer so often.
  33  *   But there might still be some ...
  34  */
  35
  36 #include <linux/init.h>
  37 #include <linux/module.h>
  38
  39 #include <linux/platform_device.h>
  40
  41 #include <linux/ioport.h>
  42 #include <linux/slab.h>
  43 #include <linux/io.h>
  44 #include <linux/interrupt.h>
  45
  46 /* HZ */
  47 #include <linux/param.h>
  48 /* jiffies, time_*() */
  49 #include <linux/jiffies.h>
  50 /* schedule_timeout*() */
  51 #include <linux/sched.h>
  52 /* spin_lock*() */
  53 #include <linux/spinlock.h>
  54 /* struct mutex, mutex_init(), mutex_*lock() */
  55 #include <linux/mutex.h>
  56
  57 /* snd_printk(), snd_printd() */
  58 #include <sound/core.h>
  59 #include <sound/pcm.h>
  60 #include <sound/pcm_params.h>
  61 #include <sound/initval.h>
  62 #include <sound/ac97_codec.h>
  63
  64 #include "pcm-indirect2.h"
  65
  66
  67 #define SND_ML403_AC97CR_DRIVER "ml403-ac97cr"
  68
  69 MODULE_AUTHOR("Joachim Foerster <JOFT@gmx.de>");
  70 MODULE_DESCRIPTION("Xilinx ML403 AC97 Controller Reference");
  71 MODULE_LICENSE("GPL");
  72 MODULE_SUPPORTED_DEVICE("{{Xilinx,ML403 AC97 Controller Reference}}");
  73
  74 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
  75 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
  76 static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE;
  77
  78 module_param_array(index, int, NULL, 0444);
  79 MODULE_PARM_DESC(index, "Index value for ML403 AC97 Controller Reference.");
  80 module_param_array(id, charp, NULL, 0444);
  81 MODULE_PARM_DESC(id, "ID string for ML403 AC97 Controller Reference.");
  82 module_param_array(enable, bool, NULL, 0444);
  83 MODULE_PARM_DESC(enable, "Enable this ML403 AC97 Controller Reference.");
  84
  85 /* Special feature options */
  86 /*#define CODEC_WRITE_CHECK_RAF*/ /* don't return after a write to a codec
  87                                    * register, while RAF bit is not set
  88                                    */
  89 /* Debug options for code which may be removed completely in a final version */
  90 #ifdef CONFIG_SND_DEBUG
  91 /*#define CODEC_STAT*/            /* turn on some minimal "statistics"
  92                                    * about codec register usage
  93                                    */
  94 #define SND_PCM_INDIRECT2_STAT    /* turn on some "statistics" about the
  95                                    * process of copying bytes from the
  96                                    * intermediate buffer to the hardware
  97                                    * fifo and the other way round
  98                                    */
  99 #endif
 100
 101 /* Definition of a "level/facility dependent" printk(); may be removed
 102  * completely in a final version
 103  */
 104 #undef PDEBUG
 105 #ifdef CONFIG_SND_DEBUG
 106 /* "facilities" for PDEBUG */
 107 #define UNKNOWN       (1<<0)
 108 #define CODEC_SUCCESS (1<<1)
 109 #define CODEC_FAKE    (1<<2)
 110 #define INIT_INFO     (1<<3)
 111 #define INIT_FAILURE  (1<<4)
 112 #define WORK_INFO     (1<<5)
 113 #define WORK_FAILURE  (1<<6)
 114
 115 #define PDEBUG_FACILITIES (UNKNOWN | INIT_FAILURE | WORK_FAILURE)
 116
 117 #define PDEBUG(fac, fmt, args...) do { \
 118                 if (fac & PDEBUG_FACILITIES) \
 119                         snd_printd(KERN_DEBUG SND_ML403_AC97CR_DRIVER ": " \
 120                                    fmt, ##args); \
 121         } while (0)
 122 #else
 123 #define PDEBUG(fac, fmt, args...) /* nothing */
 124 #endif
 125
 126
 127
 128 /* Defines for "waits"/timeouts (portions of HZ=250 on arch/ppc by default) */
 129 #define CODEC_TIMEOUT_ON_INIT       5   /* timeout for checking for codec
 130                                          * readiness (after insmod)
 131                                          */
 132 #ifndef CODEC_WRITE_CHECK_RAF
 133 #define CODEC_WAIT_AFTER_WRITE    100   /* general, static wait after a write
 134                                          * access to a codec register, may be
 135                                          * 0 to completely remove wait
 136                                          */
 137 #else
 138 #define CODEC_TIMEOUT_AFTER_WRITE   5   /* timeout after a write access to a
 139                                          * codec register, if RAF bit is used
 140                                          */
 141 #endif
 142 #define CODEC_TIMEOUT_AFTER_READ    5   /* timeout after a read access to a
 143                                          * codec register (checking RAF bit)
 144                                          */
 145
 146 /* Infrastructure for codec register shadowing */
 147 #define LM4550_REG_OK        (1<<0)   /* register exists */
 148 #define LM4550_REG_DONEREAD  (1<<1)   /* read register once, value should be
 149                                        * the same currently in the register
 150                                        */
 151 #define LM4550_REG_NOSAVE    (1<<2)   /* values written to this register will
 152                                        * not be saved in the register
 153                                        */
 154 #define LM4550_REG_NOSHADOW  (1<<3)   /* don't do register shadowing, use plain
 155                                        * hardware access
 156                                        */
 157 #define LM4550_REG_READONLY  (1<<4)   /* register is read only */
 158 #define LM4550_REG_FAKEPROBE (1<<5)   /* fake write _and_ read actions during
 159                                        * probe() correctly
 160                                        */
 161 #define LM4550_REG_FAKEREAD  (1<<6)   /* fake read access, always return
 162                                        * default value
 163                                        */
 164 #define LM4550_REG_ALLFAKE   (LM4550_REG_FAKEREAD | LM4550_REG_FAKEPROBE)
 165
 166 struct lm4550_reg {
 167         u16 value;
 168         u16 flag;
 169         u16 wmask;
 170         u16 def;
 171 };
 172
 173 struct lm4550_reg lm4550_regfile[64] = {
 174         [AC97_RESET / 2]              = {.flag = LM4550_REG_OK \
 175                                                 | LM4550_REG_NOSAVE \
 176                                                 | LM4550_REG_FAKEREAD,
 177                                          .def = 0x0D50},
 178         [AC97_MASTER / 2]             = {.flag = LM4550_REG_OK
 179                                                 | LM4550_REG_FAKEPROBE,
 180                                          .wmask = 0x9F1F,
 181                                          .def = 0x8000},
 182         [AC97_HEADPHONE / 2]          = {.flag = LM4550_REG_OK \
 183                                                 | LM4550_REG_FAKEPROBE,
 184                                          .wmask = 0x9F1F,
 185                                          .def = 0x8000},
 186         [AC97_MASTER_MONO / 2]        = {.flag = LM4550_REG_OK \
 187                                                 | LM4550_REG_FAKEPROBE,
 188                                          .wmask = 0x801F,
 189                                          .def = 0x8000},
 190         [AC97_PC_BEEP / 2]            = {.flag = LM4550_REG_OK \
 191                                                 | LM4550_REG_FAKEPROBE,
 192                                          .wmask = 0x801E,
 193                                          .def = 0x0},
 194         [AC97_PHONE / 2]              = {.flag = LM4550_REG_OK \
 195                                                 | LM4550_REG_FAKEPROBE,
 196                                          .wmask = 0x801F,
 197                                          .def = 0x8008},
 198         [AC97_MIC / 2]                = {.flag = LM4550_REG_OK \
 199                                                 | LM4550_REG_FAKEPROBE,
 200                                          .wmask = 0x805F,
 201                                          .def = 0x8008},
 202         [AC97_LINE / 2]               = {.flag = LM4550_REG_OK \
 203                                                 | LM4550_REG_FAKEPROBE,
 204                                          .wmask = 0x9F1F,
 205                                          .def = 0x8808},
 206         [AC97_CD / 2]                 = {.flag = LM4550_REG_OK \
 207                                                 | LM4550_REG_FAKEPROBE,
 208                                          .wmask = 0x9F1F,
 209                                          .def = 0x8808},
 210         [AC97_VIDEO / 2]              = {.flag = LM4550_REG_OK \
 211                                                 | LM4550_REG_FAKEPROBE,
 212                                          .wmask = 0x9F1F,
 213                                          .def = 0x8808},
 214         [AC97_AUX / 2]                = {.flag = LM4550_REG_OK \
 215                                                 | LM4550_REG_FAKEPROBE,
 216                                          .wmask = 0x9F1F,
 217                                          .def = 0x8808},
 218         [AC97_PCM / 2]                = {.flag = LM4550_REG_OK \
 219                                                 | LM4550_REG_FAKEPROBE,
 220                                          .wmask = 0x9F1F,
 221                                          .def = 0x8008},
 222         [AC97_REC_SEL / 2]            = {.flag = LM4550_REG_OK \
 223                                                 | LM4550_REG_FAKEPROBE,
 224                                          .wmask = 0x707,
 225                                          .def = 0x0},
 226         [AC97_REC_GAIN / 2]           = {.flag = LM4550_REG_OK \
 227                                                 | LM4550_REG_FAKEPROBE,
 228                                          .wmask = 0x8F0F,
 229                                          .def = 0x8000},
 230         [AC97_GENERAL_PURPOSE / 2]    = {.flag = LM4550_REG_OK \
 231                                                 | LM4550_REG_FAKEPROBE,
 232                                          .def = 0x0,
 233                                          .wmask = 0xA380},
 234         [AC97_3D_CONTROL / 2]         = {.flag = LM4550_REG_OK \
 235                                                 | LM4550_REG_FAKEREAD \
 236                                                 | LM4550_REG_READONLY,
 237                                          .def = 0x0101},
 238         [AC97_POWERDOWN / 2]          = {.flag = LM4550_REG_OK \
 239                                                 | LM4550_REG_NOSHADOW \
 240                                                 | LM4550_REG_NOSAVE,
 241                                          .wmask = 0xFF00},
 242                                         /* may not write ones to
 243                                          * REF/ANL/DAC/ADC bits
 244                                          * FIXME: Is this ok?
 245                                          */
 246         [AC97_EXTENDED_ID / 2]        = {.flag = LM4550_REG_OK \
 247                                                 | LM4550_REG_FAKEREAD \
 248                                                 | LM4550_REG_READONLY,
 249                                          .def = 0x0201}, /* primary codec */
 250         [AC97_EXTENDED_STATUS / 2]    = {.flag = LM4550_REG_OK \
 251                                                 | LM4550_REG_NOSHADOW \
 252                                                 | LM4550_REG_NOSAVE,
 253                                          .wmask = 0x1},
 254         [AC97_PCM_FRONT_DAC_RATE / 2] = {.flag = LM4550_REG_OK \
 255                                                 | LM4550_REG_FAKEPROBE,
 256                                          .def = 0xBB80,
 257                                          .wmask = 0xFFFF},
 258         [AC97_PCM_LR_ADC_RATE / 2]    = {.flag = LM4550_REG_OK \
 259                                                 | LM4550_REG_FAKEPROBE,
 260                                          .def = 0xBB80,
 261                                          .wmask = 0xFFFF},
 262         [AC97_VENDOR_ID1 / 2]         = {.flag = LM4550_REG_OK \
 263                                                 | LM4550_REG_READONLY \
 264                                                 | LM4550_REG_FAKEREAD,
 265                                          .def = 0x4E53},
 266         [AC97_VENDOR_ID2 / 2]         = {.flag = LM4550_REG_OK \
 267                                                 | LM4550_REG_READONLY \
 268                                                 | LM4550_REG_FAKEREAD,
 269                                          .def = 0x4350}
 270 };
 271
 272 #define LM4550_RF_OK(reg)    (lm4550_regfile[reg / 2].flag & LM4550_REG_OK)
 273
 274 static void lm4550_regfile_init(void)
 275 {
 276         int i;
 277         for (i = 0; i < 64; i++)
 278                 if (lm4550_regfile[i].flag & LM4550_REG_FAKEPROBE)
 279                         lm4550_regfile[i].value = lm4550_regfile[i].def;
 280 }
 281
 282 static void lm4550_regfile_write_values_after_init(struct snd_ac97 *ac97)
 283 {
 284         int i;
 285         for (i = 0; i < 64; i++)
 286                 if ((lm4550_regfile[i].flag & LM4550_REG_FAKEPROBE) &&
 287                     (lm4550_regfile[i].value != lm4550_regfile[i].def)) {
 288                         PDEBUG(CODEC_FAKE, "lm4550_regfile_write_values_after_"
 289                                "init(): reg=0x%x value=0x%x / %d is different "
 290                                "from def=0x%x / %d\n",
 291                                i, lm4550_regfile[i].value,
 292                                lm4550_regfile[i].value, lm4550_regfile[i].def,
 293                                lm4550_regfile[i].def);
 294                         snd_ac97_write(ac97, i * 2, lm4550_regfile[i].value);
 295                         lm4550_regfile[i].flag |= LM4550_REG_DONEREAD;
 296                 }
 297 }
 298
 299
 300 /* direct registers */
 301 #define CR_REG(ml403_ac97cr, x) ((ml403_ac97cr)->port + CR_REG_##x)
 302
 303 #define CR_REG_PLAYFIFO         0x00
 304 #define   CR_PLAYDATA(a)        ((a) & 0xFFFF)
 305
 306 #define CR_REG_RECFIFO          0x04
 307 #define   CR_RECDATA(a)         ((a) & 0xFFFF)
 308
 309 #define CR_REG_STATUS           0x08
 310 #define   CR_RECOVER            (1<<7)
 311 #define   CR_PLAYUNDER          (1<<6)
 312 #define   CR_CODECREADY         (1<<5)
 313 #define   CR_RAF                (1<<4)
 314 #define   CR_RECEMPTY           (1<<3)
 315 #define   CR_RECFULL            (1<<2)
 316 #define   CR_PLAYHALF           (1<<1)
 317 #define   CR_PLAYFULL           (1<<0)
 318
 319 #define CR_REG_RESETFIFO        0x0C
 320 #define   CR_RECRESET           (1<<1)
 321 #define   CR_PLAYRESET          (1<<0)
 322
 323 #define CR_REG_CODEC_ADDR       0x10
 324 /* UG082 says:
 325  * #define   CR_CODEC_ADDR(a)  ((a) << 1)
 326  * #define   CR_CODEC_READ     (1<<0)
 327  * #define   CR_CODEC_WRITE    (0<<0)
 328  */
 329 /* RefDesign example says: */
 330 #define   CR_CODEC_ADDR(a)      ((a) << 0)
 331 #define   CR_CODEC_READ         (1<<7)
 332 #define   CR_CODEC_WRITE        (0<<7)
 333
 334 #define CR_REG_CODEC_DATAREAD   0x14
 335 #define   CR_CODEC_DATAREAD(v)  ((v) & 0xFFFF)
 336
 337 #define CR_REG_CODEC_DATAWRITE  0x18
 338 #define   CR_CODEC_DATAWRITE(v) ((v) & 0xFFFF)
 339
 340 #define CR_FIFO_SIZE            32
 341
 342 struct snd_ml403_ac97cr {
 343         /* lock for access to (controller) registers */
 344         spinlock_t reg_lock;
 345         /* mutex for the whole sequence of accesses to (controller) registers
 346          * which affect codec registers
 347          */
 348         struct mutex cdc_mutex;
 349
 350         int irq; /* for playback */
 351         int enable_irq; /* for playback */
 352
 353         int capture_irq;
 354         int enable_capture_irq;
 355
 356         struct resource *res_port;
 357         void *port;
 358
 359         struct snd_ac97 *ac97;
 360         int ac97_fake;
 361 #ifdef CODEC_STAT
 362         int ac97_read;
 363         int ac97_write;
 364 #endif
 365
 366         struct platform_device *pfdev;
 367         struct snd_card *card;
 368         struct snd_pcm *pcm;
 369         struct snd_pcm_substream *playback_substream;
 370         struct snd_pcm_substream *capture_substream;
 371
 372         struct snd_pcm_indirect2 ind_rec; /* for playback */
 373         struct snd_pcm_indirect2 capture_ind2_rec;
 374 };
 375
 376 static struct snd_pcm_hardware snd_ml403_ac97cr_playback = {
 377         .info =             (SNDRV_PCM_INFO_MMAP |
 378                              SNDRV_PCM_INFO_INTERLEAVED |
 379                              SNDRV_PCM_INFO_MMAP_VALID),
 380         .formats =          SNDRV_PCM_FMTBIT_S16_BE,
 381         .rates =            (SNDRV_PCM_RATE_CONTINUOUS |
 382                              SNDRV_PCM_RATE_8000_48000),
 383         .rate_min =         4000,
 384         .rate_max =         48000,
 385         .channels_min =     2,
 386         .channels_max =     2,
 387         .buffer_bytes_max = (128*1024),
 388         .period_bytes_min = CR_FIFO_SIZE/2,
 389         .period_bytes_max = (64*1024),
 390         .periods_min =      2,
 391         .periods_max =      (128*1024)/(CR_FIFO_SIZE/2),
 392         .fifo_size =        0,
 393 };
 394
 395 static struct snd_pcm_hardware snd_ml403_ac97cr_capture = {
 396         .info =             (SNDRV_PCM_INFO_MMAP |
 397                              SNDRV_PCM_INFO_INTERLEAVED |
 398                              SNDRV_PCM_INFO_MMAP_VALID),
 399         .formats =          SNDRV_PCM_FMTBIT_S16_BE,
 400         .rates =            (SNDRV_PCM_RATE_CONTINUOUS |
 401                              SNDRV_PCM_RATE_8000_48000),
 402         .rate_min =         4000,
 403         .rate_max =         48000,
 404         .channels_min =     2,
 405         .channels_max =     2,
 406         .buffer_bytes_max = (128*1024),
 407         .period_bytes_min = CR_FIFO_SIZE/2,
 408         .period_bytes_max = (64*1024),
 409         .periods_min =      2,
 410         .periods_max =      (128*1024)/(CR_FIFO_SIZE/2),
 411         .fifo_size =        0,
 412 };
 413
 414 static size_t
 415 snd_ml403_ac97cr_playback_ind2_zero(struct snd_pcm_substream *substream,
 416                                     struct snd_pcm_indirect2 *rec)
 417 {
 418         struct snd_ml403_ac97cr *ml403_ac97cr;
 419         int copied_words = 0;
 420         u32 full = 0;
 421
 422         ml403_ac97cr = snd_pcm_substream_chip(substream);
 423
 424         spin_lock(&ml403_ac97cr->reg_lock);
 425         while ((full = (in_be32(CR_REG(ml403_ac97cr, STATUS)) &
 426                         CR_PLAYFULL)) != CR_PLAYFULL) {
 427                 out_be32(CR_REG(ml403_ac97cr, PLAYFIFO), 0);
 428                 copied_words++;
 429         }
 430         rec->hw_ready = 0;
 431         spin_unlock(&ml403_ac97cr->reg_lock);
 432
 433         return (size_t) (copied_words * 2);
 434 }
 435
 436 static size_t
 437 snd_ml403_ac97cr_playback_ind2_copy(struct snd_pcm_substream *substream,
 438                                     struct snd_pcm_indirect2 *rec,
 439                                     size_t bytes)
 440 {
 441         struct snd_ml403_ac97cr *ml403_ac97cr;
 442         u16 *src;
 443         int copied_words = 0;
 444         u32 full = 0;
 445
 446         ml403_ac97cr = snd_pcm_substream_chip(substream);
 447         src = (u16 *)(substream->runtime->dma_area + rec->sw_data);
 448
 449         spin_lock(&ml403_ac97cr->reg_lock);
 450         while (((full = (in_be32(CR_REG(ml403_ac97cr, STATUS)) &
 451                          CR_PLAYFULL)) != CR_PLAYFULL) && (bytes > 1)) {
 452                 out_be32(CR_REG(ml403_ac97cr, PLAYFIFO),
 453                          CR_PLAYDATA(src[copied_words]));
 454                 copied_words++;
 455                 bytes = bytes - 2;
 456         }
 457         if (full != CR_PLAYFULL)
 458                 rec->hw_ready = 1;
 459         else
 460                 rec->hw_ready = 0;
 461         spin_unlock(&ml403_ac97cr->reg_lock);
 462
 463         return (size_t) (copied_words * 2);
 464 }
 465
 466 static size_t
 467 snd_ml403_ac97cr_capture_ind2_null(struct snd_pcm_substream *substream,
 468                                    struct snd_pcm_indirect2 *rec)
 469 {
 470         struct snd_ml403_ac97cr *ml403_ac97cr;
 471         int copied_words = 0;
 472         u32 empty = 0;
 473
 474         ml403_ac97cr = snd_pcm_substream_chip(substream);
 475
 476         spin_lock(&ml403_ac97cr->reg_lock);
 477         while ((empty = (in_be32(CR_REG(ml403_ac97cr, STATUS)) &
 478                          CR_RECEMPTY)) != CR_RECEMPTY) {
 479                 volatile u32 trash;
 480
 481                 trash = CR_RECDATA(in_be32(CR_REG(ml403_ac97cr, RECFIFO)));
 482                 /* Hmmmm, really necessary? Don't want call to in_be32()
 483                  * to be optimised away!
 484                  */
 485                 trash++;
 486                 copied_words++;
 487         }
 488         rec->hw_ready = 0;
 489         spin_unlock(&ml403_ac97cr->reg_lock);
 490
 491         return (size_t) (copied_words * 2);
 492 }
 493
 494 static size_t
 495 snd_ml403_ac97cr_capture_ind2_copy(struct snd_pcm_substream *substream,
 496                                    struct snd_pcm_indirect2 *rec, size_t bytes)
 497 {
 498         struct snd_ml403_ac97cr *ml403_ac97cr;
 499         u16 *dst;
 500         int copied_words = 0;
 501         u32 empty = 0;
 502
 503         ml403_ac97cr = snd_pcm_substream_chip(substream);
 504         dst = (u16 *)(substream->runtime->dma_area + rec->sw_data);
 505
 506         spin_lock(&ml403_ac97cr->reg_lock);
 507         while (((empty = (in_be32(CR_REG(ml403_ac97cr, STATUS)) &
 508                           CR_RECEMPTY)) != CR_RECEMPTY) && (bytes > 1)) {
 509                 dst[copied_words] = CR_RECDATA(in_be32(CR_REG(ml403_ac97cr,
 510                                                               RECFIFO)));
 511                 copied_words++;
 512                 bytes = bytes - 2;
 513         }
 514         if (empty != CR_RECEMPTY)
 515                 rec->hw_ready = 1;
 516         else
 517                 rec->hw_ready = 0;
 518         spin_unlock(&ml403_ac97cr->reg_lock);
 519
 520         return (size_t) (copied_words * 2);
 521 }
 522
 523 static snd_pcm_uframes_t
 524 snd_ml403_ac97cr_pcm_pointer(struct snd_pcm_substream *substream)
 525 {
 526         struct snd_ml403_ac97cr *ml403_ac97cr;
 527         struct snd_pcm_indirect2 *ind2_rec = NULL;
 528
 529         ml403_ac97cr = snd_pcm_substream_chip(substream);
 530
 531         if (substream == ml403_ac97cr->playback_substream)
 532                 ind2_rec = &ml403_ac97cr->ind_rec;
 533         if (substream == ml403_ac97cr->capture_substream)
 534                 ind2_rec = &ml403_ac97cr->capture_ind2_rec;
 535
 536         if (ind2_rec != NULL)
 537                 return snd_pcm_indirect2_pointer(substream, ind2_rec);
 538         return (snd_pcm_uframes_t) 0;
 539 }
 540
 541 static int
 542 snd_ml403_ac97cr_pcm_playback_trigger(struct snd_pcm_substream *substream,
 543                                       int cmd)
 544 {
 545         struct snd_ml403_ac97cr *ml403_ac97cr;
 546         int err = 0;
 547
 548         ml403_ac97cr = snd_pcm_substream_chip(substream);
 549
 550         switch (cmd) {
 551         case SNDRV_PCM_TRIGGER_START:
 552                 PDEBUG(WORK_INFO, "trigger(playback): START\n");
 553                 ml403_ac97cr->ind_rec.hw_ready = 1;
 554
 555                 /* clear play FIFO */
 556                 out_be32(CR_REG(ml403_ac97cr, RESETFIFO), CR_PLAYRESET);
 557
 558                 /* enable play irq */
 559                 ml403_ac97cr->enable_irq = 1;
 560                 enable_irq(ml403_ac97cr->irq);
 561                 break;
 562         case SNDRV_PCM_TRIGGER_STOP:
 563                 PDEBUG(WORK_INFO, "trigger(playback): STOP\n");
 564                 ml403_ac97cr->ind_rec.hw_ready = 0;
 565 #ifdef SND_PCM_INDIRECT2_STAT
 566                 snd_pcm_indirect2_stat(substream, &ml403_ac97cr->ind_rec);
 567 #endif
 568                 /* disable play irq */
 569                 disable_irq_nosync(ml403_ac97cr->irq);
 570                 ml403_ac97cr->enable_irq = 0;
 571                 break;
 572         default:
 573                 err = -EINVAL;
 574                 break;
 575         }
 576         PDEBUG(WORK_INFO, "trigger(playback): (done)\n");
 577         return err;
 578 }
 579
 580 static int
 581 snd_ml403_ac97cr_pcm_capture_trigger(struct snd_pcm_substream *substream,
 582                                       int cmd)
 583 {
 584         struct snd_ml403_ac97cr *ml403_ac97cr;
 585         int err = 0;
 586
 587         ml403_ac97cr = snd_pcm_substream_chip(substream);
 588
 589         switch (cmd) {
 590         case SNDRV_PCM_TRIGGER_START:
 591                 PDEBUG(WORK_INFO, "trigger(capture): START\n");
 592                 ml403_ac97cr->capture_ind2_rec.hw_ready = 0;
 593
 594                 /* clear record FIFO */
 595                 out_be32(CR_REG(ml403_ac97cr, RESETFIFO), CR_RECRESET);
 596
 597                 /* enable record irq */
 598                 ml403_ac97cr->enable_capture_irq = 1;
 599                 enable_irq(ml403_ac97cr->capture_irq);
 600                 break;
 601         case SNDRV_PCM_TRIGGER_STOP:
 602                 PDEBUG(WORK_INFO, "trigger(capture): STOP\n");
 603                 ml403_ac97cr->capture_ind2_rec.hw_ready = 0;
 604 #ifdef SND_PCM_INDIRECT2_STAT
 605                 snd_pcm_indirect2_stat(substream,
 606                                        &ml403_ac97cr->capture_ind2_rec);
 607 #endif
 608                 /* disable capture irq */
 609                 disable_irq_nosync(ml403_ac97cr->capture_irq);
 610                 ml403_ac97cr->enable_capture_irq = 0;
 611                 break;
 612         default:
 613                 err = -EINVAL;
 614                 break;
 615         }
 616         PDEBUG(WORK_INFO, "trigger(capture): (done)\n");
 617         return err;
 618 }
 619
 620 static int
 621 snd_ml403_ac97cr_pcm_playback_prepare(struct snd_pcm_substream *substream)
 622 {
 623         struct snd_ml403_ac97cr *ml403_ac97cr;
 624         struct snd_pcm_runtime *runtime;
 625
 626         ml403_ac97cr = snd_pcm_substream_chip(substream);
 627         runtime = substream->runtime;
 628
 629         PDEBUG(WORK_INFO,
 630                "prepare(): period_bytes=%d, minperiod_bytes=%d\n",
 631                snd_pcm_lib_period_bytes(substream), CR_FIFO_SIZE / 2);
 632
 633         /* set sampling rate */
 634         snd_ac97_set_rate(ml403_ac97cr->ac97, AC97_PCM_FRONT_DAC_RATE,
 635                           runtime->rate);
 636         PDEBUG(WORK_INFO, "prepare(): rate=%d\n", runtime->rate);
 637
 638         /* init struct for intermediate buffer */
 639         memset(&ml403_ac97cr->ind_rec, 0,
 640                sizeof(struct snd_pcm_indirect2));
 641         ml403_ac97cr->ind_rec.hw_buffer_size = CR_FIFO_SIZE;
 642         ml403_ac97cr->ind_rec.sw_buffer_size =
 643                 snd_pcm_lib_buffer_bytes(substream);
 644         ml403_ac97cr->ind_rec.min_periods = -1;
 645         ml403_ac97cr->ind_rec.min_multiple =
 646                 snd_pcm_lib_period_bytes(substream) / (CR_FIFO_SIZE / 2);
 647         PDEBUG(WORK_INFO, "prepare(): hw_buffer_size=%d, "
 648                "sw_buffer_size=%d, min_multiple=%d\n",
 649                CR_FIFO_SIZE, ml403_ac97cr->ind_rec.sw_buffer_size,
 650                ml403_ac97cr->ind_rec.min_multiple);
 651         return 0;
 652 }
 653
 654 static int
 655 snd_ml403_ac97cr_pcm_capture_prepare(struct snd_pcm_substream *substream)
 656 {
 657         struct snd_ml403_ac97cr *ml403_ac97cr;
 658         struct snd_pcm_runtime *runtime;
 659
 660         ml403_ac97cr = snd_pcm_substream_chip(substream);
 661         runtime = substream->runtime;
 662
 663         PDEBUG(WORK_INFO,
 664                "prepare(capture): period_bytes=%d, minperiod_bytes=%d\n",
 665                snd_pcm_lib_period_bytes(substream), CR_FIFO_SIZE / 2);
 666
 667         /* set sampling rate */
 668         snd_ac97_set_rate(ml403_ac97cr->ac97, AC97_PCM_LR_ADC_RATE,
 669                           runtime->rate);
 670         PDEBUG(WORK_INFO, "prepare(capture): rate=%d\n", runtime->rate);
 671
 672         /* init struct for intermediate buffer */
 673         memset(&ml403_ac97cr->capture_ind2_rec, 0,
 674                sizeof(struct snd_pcm_indirect2));
 675         ml403_ac97cr->capture_ind2_rec.hw_buffer_size = CR_FIFO_SIZE;
 676         ml403_ac97cr->capture_ind2_rec.sw_buffer_size =
 677                 snd_pcm_lib_buffer_bytes(substream);
 678         ml403_ac97cr->capture_ind2_rec.min_multiple =
 679                 snd_pcm_lib_period_bytes(substream) / (CR_FIFO_SIZE / 2);
 680         PDEBUG(WORK_INFO, "prepare(capture): hw_buffer_size=%d, "
 681                "sw_buffer_size=%d, min_multiple=%d\n", CR_FIFO_SIZE,
 682                ml403_ac97cr->capture_ind2_rec.sw_buffer_size,
 683                ml403_ac97cr->capture_ind2_rec.min_multiple);
 684         return 0;
 685 }
 686
 687 static int snd_ml403_ac97cr_hw_free(struct snd_pcm_substream *substream)
 688 {
 689         PDEBUG(WORK_INFO, "hw_free()\n");
 690         return snd_pcm_lib_free_pages(substream);
 691 }
 692
 693 static int
 694 snd_ml403_ac97cr_hw_params(struct snd_pcm_substream *substream,
 695                            struct snd_pcm_hw_params *hw_params)
 696 {
 697         PDEBUG(WORK_INFO, "hw_params(): desired buffer bytes=%d, desired "
 698                "period bytes=%d\n",
 699                params_buffer_bytes(hw_params), params_period_bytes(hw_params));
 700         return snd_pcm_lib_malloc_pages(substream,
 701                                         params_buffer_bytes(hw_params));
 702 }
 703
 704 static int snd_ml403_ac97cr_playback_open(struct snd_pcm_substream *substream)
 705 {
 706         struct snd_ml403_ac97cr *ml403_ac97cr;
 707         struct snd_pcm_runtime *runtime;
 708
 709         ml403_ac97cr = snd_pcm_substream_chip(substream);
 710         runtime = substream->runtime;
 711
 712         PDEBUG(WORK_INFO, "open(playback)\n");
 713         ml403_ac97cr->playback_substream = substream;
 714         runtime->hw = snd_ml403_ac97cr_playback;
 715
 716         snd_pcm_hw_constraint_step(runtime, 0,
 717                                    SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
 718                                    CR_FIFO_SIZE / 2);
 719         return 0;
 720 }
 721
 722 static int snd_ml403_ac97cr_capture_open(struct snd_pcm_substream *substream)
 723 {
 724         struct snd_ml403_ac97cr *ml403_ac97cr;
 725         struct snd_pcm_runtime *runtime;
 726
 727         ml403_ac97cr = snd_pcm_substream_chip(substream);
 728         runtime = substream->runtime;
 729
 730         PDEBUG(WORK_INFO, "open(capture)\n");
 731         ml403_ac97cr->capture_substream = substream;
 732         runtime->hw = snd_ml403_ac97cr_capture;
 733
 734         snd_pcm_hw_constraint_step(runtime, 0,
 735                                    SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
 736                                    CR_FIFO_SIZE / 2);
 737         return 0;
 738 }
 739
 740 static int snd_ml403_ac97cr_playback_close(struct snd_pcm_substream *substream)
 741 {
 742         struct snd_ml403_ac97cr *ml403_ac97cr;
 743
 744         ml403_ac97cr = snd_pcm_substream_chip(substream);
 745
 746         PDEBUG(WORK_INFO, "close(playback)\n");
 747         ml403_ac97cr->playback_substream = NULL;
 748         return 0;
 749 }
 750
 751 static int snd_ml403_ac97cr_capture_close(struct snd_pcm_substream *substream)
 752 {
 753         struct snd_ml403_ac97cr *ml403_ac97cr;
 754
 755         ml403_ac97cr = snd_pcm_substream_chip(substream);
 756
 757         PDEBUG(WORK_INFO, "close(capture)\n");
 758         ml403_ac97cr->capture_substream = NULL;
 759         return 0;
 760 }
 761
 762 static struct snd_pcm_ops snd_ml403_ac97cr_playback_ops = {
 763         .open = snd_ml403_ac97cr_playback_open,
 764         .close = snd_ml403_ac97cr_playback_close,
 765         .ioctl = snd_pcm_lib_ioctl,
 766         .hw_params = snd_ml403_ac97cr_hw_params,
 767         .hw_free = snd_ml403_ac97cr_hw_free,
 768         .prepare = snd_ml403_ac97cr_pcm_playback_prepare,
 769         .trigger = snd_ml403_ac97cr_pcm_playback_trigger,
 770         .pointer = snd_ml403_ac97cr_pcm_pointer,
 771 };
 772
 773 static struct snd_pcm_ops snd_ml403_ac97cr_capture_ops = {
 774         .open = snd_ml403_ac97cr_capture_open,
 775         .close = snd_ml403_ac97cr_capture_close,
 776         .ioctl = snd_pcm_lib_ioctl,
 777         .hw_params = snd_ml403_ac97cr_hw_params,
 778         .hw_free = snd_ml403_ac97cr_hw_free,
 779         .prepare = snd_ml403_ac97cr_pcm_capture_prepare,
 780         .trigger = snd_ml403_ac97cr_pcm_capture_trigger,
 781         .pointer = snd_ml403_ac97cr_pcm_pointer,
 782 };
 783
 784 static irqreturn_t snd_ml403_ac97cr_irq(int irq, void *dev_id)
 785 {
 786         struct snd_ml403_ac97cr *ml403_ac97cr;
 787         struct platform_device *pfdev;
 788         int cmp_irq;
 789
 790         ml403_ac97cr = (struct snd_ml403_ac97cr *)dev_id;
 791         if (ml403_ac97cr == NULL)
 792                 return IRQ_NONE;
 793
 794         pfdev = ml403_ac97cr->pfdev;
 795
 796         /* playback interrupt */
 797         cmp_irq = platform_get_irq(pfdev, 0);
 798         if (irq == cmp_irq) {
 799                 if (ml403_ac97cr->enable_irq)
 800                         snd_pcm_indirect2_playback_interrupt(
 801                                 ml403_ac97cr->playback_substream,
 802                                 &ml403_ac97cr->ind_rec,
 803                                 snd_ml403_ac97cr_playback_ind2_copy,
 804                                 snd_ml403_ac97cr_playback_ind2_zero);
 805                 else
 806                         goto __disable_irq;
 807         } else {
 808                 /* record interrupt */
 809                 cmp_irq = platform_get_irq(pfdev, 1);
 810                 if (irq == cmp_irq) {
 811                         if (ml403_ac97cr->enable_capture_irq)
 812                                 snd_pcm_indirect2_capture_interrupt(
 813                                         ml403_ac97cr->capture_substream,
 814                                         &ml403_ac97cr->capture_ind2_rec,
 815                                         snd_ml403_ac97cr_capture_ind2_copy,
 816                                         snd_ml403_ac97cr_capture_ind2_null);
 817                         else
 818                                 goto __disable_irq;
 819                 } else
 820                         return IRQ_NONE;
 821         }
 822         return IRQ_HANDLED;
 823
 824 __disable_irq:
 825         PDEBUG(INIT_INFO, "irq(): irq %d is meant to be disabled! So, now try "
 826                "to disable it _really_!\n", irq);
 827         disable_irq_nosync(irq);
 828         return IRQ_HANDLED;
 829 }
 830
 831 static unsigned short
 832 snd_ml403_ac97cr_codec_read(struct snd_ac97 *ac97, unsigned short reg)
 833 {
 834         struct snd_ml403_ac97cr *ml403_ac97cr = ac97->private_data;
 835 #ifdef CODEC_STAT
 836         u32 stat;
 837         u32 rafaccess = 0;
 838 #endif
 839         unsigned long end_time;
 840         u16 value = 0;
 841
 842         if (!LM4550_RF_OK(reg)) {
 843                 snd_printk(KERN_WARNING SND_ML403_AC97CR_DRIVER ": "
 844                            "access to unknown/unused codec register 0x%x "
 845                            "ignored!\n", reg);
 846                 return 0;
 847         }
 848         /* check if we can fake/answer this access from our shadow register */
 849         if ((lm4550_regfile[reg / 2].flag &
 850              (LM4550_REG_DONEREAD | LM4550_REG_ALLFAKE)) &&
 851             !(lm4550_regfile[reg / 2].flag & LM4550_REG_NOSHADOW)) {
 852                 if (lm4550_regfile[reg / 2].flag & LM4550_REG_FAKEREAD) {
 853                         PDEBUG(CODEC_FAKE, "codec_read(): faking read from "
 854                                "reg=0x%x, val=0x%x / %d\n",
 855                                reg, lm4550_regfile[reg / 2].def,
 856                                lm4550_regfile[reg / 2].def);
 857                         return lm4550_regfile[reg / 2].def;
 858                 } else if ((lm4550_regfile[reg / 2].flag &
 859                             LM4550_REG_FAKEPROBE) &&
 860                            ml403_ac97cr->ac97_fake) {
 861                         PDEBUG(CODEC_FAKE, "codec_read(): faking read from "
 862                                "reg=0x%x, val=0x%x / %d (probe)\n",
 863                                reg, lm4550_regfile[reg / 2].value,
 864                                lm4550_regfile[reg / 2].value);
 865                         return lm4550_regfile[reg / 2].value;
 866                 } else {
 867 #ifdef CODEC_STAT
 868                         PDEBUG(CODEC_FAKE, "codec_read(): read access "
 869                                "answered by shadow register 0x%x (value=0x%x "
 870                                "/ %d) (cw=%d cr=%d)\n",
 871                                reg, lm4550_regfile[reg / 2].value,
 872                                lm4550_regfile[reg / 2].value,
 873                                ml403_ac97cr->ac97_write,
 874                                ml403_ac97cr->ac97_read);
 875 #else
 876                         PDEBUG(CODEC_FAKE, "codec_read(): read access "
 877                                "answered by shadow register 0x%x (value=0x%x "
 878                                "/ %d)\n",
 879                                reg, lm4550_regfile[reg / 2].value,
 880                                lm4550_regfile[reg / 2].value);
 881 #endif
 882                         return lm4550_regfile[reg / 2].value;
 883                 }
 884         }
 885         /* if we are here, we _have_ to access the codec really, no faking */
 886         if (mutex_lock_interruptible(&ml403_ac97cr->cdc_mutex) != 0)
 887                 return 0;
 888 #ifdef CODEC_STAT
 889         ml403_ac97cr->ac97_read++;
 890 #endif
 891         spin_lock(&ml403_ac97cr->reg_lock);
 892         out_be32(CR_REG(ml403_ac97cr, CODEC_ADDR),
 893                  CR_CODEC_ADDR(reg) | CR_CODEC_READ);
 894         spin_unlock(&ml403_ac97cr->reg_lock);
 895         end_time = jiffies + (HZ / CODEC_TIMEOUT_AFTER_READ);
 896         do {
 897                 spin_lock(&ml403_ac97cr->reg_lock);
 898 #ifdef CODEC_STAT
 899                 rafaccess++;
 900                 stat = in_be32(CR_REG(ml403_ac97cr, STATUS));
 901                 if ((stat & CR_RAF) == CR_RAF) {
 902                         value = CR_CODEC_DATAREAD(
 903                                 in_be32(CR_REG(ml403_ac97cr, CODEC_DATAREAD)));
 904                         PDEBUG(CODEC_SUCCESS, "codec_read(): (done) reg=0x%x, "
 905                                "value=0x%x / %d (STATUS=0x%x)\n",
 906                                reg, value, value, stat);
 907 #else
 908                 if ((in_be32(CR_REG(ml403_ac97cr, STATUS)) &
 909                      CR_RAF) == CR_RAF) {
 910                         value = CR_CODEC_DATAREAD(
 911                                 in_be32(CR_REG(ml403_ac97cr, CODEC_DATAREAD)));
 912                         PDEBUG(CODEC_SUCCESS, "codec_read(): (done) "
 913                                "reg=0x%x, value=0x%x / %d\n",
 914                                reg, value, value);
 915 #endif
 916                         lm4550_regfile[reg / 2].value = value;
 917                         lm4550_regfile[reg / 2].flag |= LM4550_REG_DONEREAD;
 918                         spin_unlock(&ml403_ac97cr->reg_lock);
 919                         mutex_unlock(&ml403_ac97cr->cdc_mutex);
 920                         return value;
 921                 }
 922                 spin_unlock(&ml403_ac97cr->reg_lock);
 923                 schedule_timeout_uninterruptible(1);
 924         } while (time_after(end_time, jiffies));
 925         /* read the DATAREAD register anyway, see comment below */
 926         spin_lock(&ml403_ac97cr->reg_lock);
 927         value =
 928             CR_CODEC_DATAREAD(in_be32(CR_REG(ml403_ac97cr, CODEC_DATAREAD)));
 929         spin_unlock(&ml403_ac97cr->reg_lock);
 930 #ifdef CODEC_STAT
 931         snd_printk(KERN_WARNING SND_ML403_AC97CR_DRIVER ": "
 932                    "timeout while codec read! "
 933                    "(reg=0x%x, last STATUS=0x%x, DATAREAD=0x%x / %d, %d) "
 934                    "(cw=%d, cr=%d)\n",
 935                    reg, stat, value, value, rafaccess,
 936                    ml403_ac97cr->ac97_write, ml403_ac97cr->ac97_read);
 937 #else
 938         snd_printk(KERN_WARNING SND_ML403_AC97CR_DRIVER ": "
 939                    "timeout while codec read! "
 940                    "(reg=0x%x, DATAREAD=0x%x / %d)\n",
 941                    reg, value, value);
 942 #endif
 943         /* BUG: This is PURE speculation! But after _most_ read timeouts the
 944          * value in the register is ok!
 945          */
 946         lm4550_regfile[reg / 2].value = value;
 947         lm4550_regfile[reg / 2].flag |= LM4550_REG_DONEREAD;
 948         mutex_unlock(&ml403_ac97cr->cdc_mutex);
 949         return value;
 950 }
 951
 952 static void
 953 snd_ml403_ac97cr_codec_write(struct snd_ac97 *ac97, unsigned short reg,
 954                              unsigned short val)
 955 {
 956         struct snd_ml403_ac97cr *ml403_ac97cr = ac97->private_data;
 957
 958 #ifdef CODEC_STAT
 959         u32 stat;
 960         u32 rafaccess = 0;
 961 #endif
 962 #ifdef CODEC_WRITE_CHECK_RAF
 963         unsigned long end_time;
 964 #endif
 965
 966         if (!LM4550_RF_OK(reg)) {
 967                 snd_printk(KERN_WARNING SND_ML403_AC97CR_DRIVER ": "
 968                            "access to unknown/unused codec register 0x%x "
 969                            "ignored!\n", reg);
 970                 return;
 971         }
 972         if (lm4550_regfile[reg / 2].flag & LM4550_REG_READONLY) {
 973                 snd_printk(KERN_WARNING SND_ML403_AC97CR_DRIVER ": "
 974                            "write access to read only codec register 0x%x "
 975                            "ignored!\n", reg);
 976                 return;
 977         }
 978         if ((val & lm4550_regfile[reg / 2].wmask) != val) {
 979                 snd_printk(KERN_WARNING SND_ML403_AC97CR_DRIVER ": "
 980                            "write access to codec register 0x%x "
 981                            "with bad value 0x%x / %d!\n",
 982                            reg, val, val);
 983                 val = val & lm4550_regfile[reg / 2].wmask;
 984         }
 985         if (((lm4550_regfile[reg / 2].flag & LM4550_REG_FAKEPROBE) &&
 986              ml403_ac97cr->ac97_fake) &&
 987             !(lm4550_regfile[reg / 2].flag & LM4550_REG_NOSHADOW)) {
 988                 PDEBUG(CODEC_FAKE, "codec_write(): faking write to reg=0x%x, "
 989                        "val=0x%x / %d\n", reg, val, val);
 990                 lm4550_regfile[reg / 2].value = (val &
 991                                                 lm4550_regfile[reg / 2].wmask);
 992                 return;
 993         }
 994         if (mutex_lock_interruptible(&ml403_ac97cr->cdc_mutex) != 0)
 995                 return;
 996 #ifdef CODEC_STAT
 997         ml403_ac97cr->ac97_write++;
 998 #endif
 999         spin_lock(&ml403_ac97cr->reg_lock);
1000         out_be32(CR_REG(ml403_ac97cr, CODEC_DATAWRITE),
1001                  CR_CODEC_DATAWRITE(val));
1002         out_be32(CR_REG(ml403_ac97cr, CODEC_ADDR),
1003                  CR_CODEC_ADDR(reg) | CR_CODEC_WRITE);
1004         spin_unlock(&ml403_ac97cr->reg_lock);
1005 #ifdef CODEC_WRITE_CHECK_RAF
1006         /* check CR_CODEC_RAF bit to see if write access to register is done;
1007          * loop until bit is set or timeout happens
1008          */
1009         end_time = jiffies + HZ / CODEC_TIMEOUT_AFTER_WRITE;
1010         do {
1011                 spin_lock(&ml403_ac97cr->reg_lock);
1012 #ifdef CODEC_STAT
1013                 rafaccess++;
1014                 stat = in_be32(CR_REG(ml403_ac97cr, STATUS))
1015                 if ((stat & CR_RAF) == CR_RAF) {
1016 #else
1017                 if ((in_be32(CR_REG(ml403_ac97cr, STATUS)) &
1018                      CR_RAF) == CR_RAF) {
1019 #endif
1020                         PDEBUG(CODEC_SUCCESS, "codec_write(): (done) "
1021                                "reg=0x%x, value=%d / 0x%x\n",
1022                                reg, val, val);
1023                         if (!(lm4550_regfile[reg / 2].flag &
1024                               LM4550_REG_NOSHADOW) &&
1025                             !(lm4550_regfile[reg / 2].flag &
1026                               LM4550_REG_NOSAVE))
1027                                 lm4550_regfile[reg / 2].value = val;
1028                         lm4550_regfile[reg / 2].flag |= LM4550_REG_DONEREAD;
1029                         spin_unlock(&ml403_ac97cr->reg_lock);
1030                         mutex_unlock(&ml403_ac97cr->cdc_mutex);
1031                         return;
1032                 }
1033                 spin_unlock(&ml403_ac97cr->reg_lock);
1034                 schedule_timeout_uninterruptible(1);
1035         } while (time_after(end_time, jiffies));
1036 #ifdef CODEC_STAT
1037         snd_printk(KERN_WARNING SND_ML403_AC97CR_DRIVER ": "
1038                    "timeout while codec write "
1039                    "(reg=0x%x, val=0x%x / %d, last STATUS=0x%x, %d) "
1040                    "(cw=%d, cr=%d)\n",
1041                    reg, val, val, stat, rafaccess, ml403_ac97cr->ac97_write,
1042                    ml403_ac97cr->ac97_read);
1043 #else
1044         snd_printk(KERN_WARNING SND_ML403_AC97CR_DRIVER ": "
1045                    "timeout while codec write (reg=0x%x, val=0x%x / %d)\n",
1046                    reg, val, val);
1047 #endif
1048 #else /* CODEC_WRITE_CHECK_RAF */
1049 #if CODEC_WAIT_AFTER_WRITE > 0
1050         /* officially, in AC97 spec there is no possibility for a AC97
1051          * controller to determine, if write access is done or not - so: How
1052          * is Xilinx able to provide a RAF bit for write access?
1053          * => very strange, thus just don't check RAF bit (compare with
1054          * Xilinx's example app in EDK 8.1i) and wait
1055          */
1056         schedule_timeout_uninterruptible(HZ / CODEC_WAIT_AFTER_WRITE);
1057 #endif
1058         PDEBUG(CODEC_SUCCESS, "codec_write(): (done) "
1059                "reg=0x%x, value=%d / 0x%x (no RAF check)\n",
1060                reg, val, val);
1061 #endif
1062         mutex_unlock(&ml403_ac97cr->cdc_mutex);
1063         return;
1064 }
1065
1066 static int
1067 snd_ml403_ac97cr_chip_init(struct snd_ml403_ac97cr *ml403_ac97cr)
1068 {
1069         unsigned long end_time;
1070         PDEBUG(INIT_INFO, "chip_init():\n");
1071         end_time = jiffies + HZ / CODEC_TIMEOUT_ON_INIT;
1072         do {
1073                 if (in_be32(CR_REG(ml403_ac97cr, STATUS)) & CR_CODECREADY) {
1074                         /* clear both hardware FIFOs */
1075                         out_be32(CR_REG(ml403_ac97cr, RESETFIFO),
1076                                  CR_RECRESET | CR_PLAYRESET);
1077                         PDEBUG(INIT_INFO, "chip_init(): (done)\n");
1078                         return 0;
1079                 }
1080                 schedule_timeout_uninterruptible(1);
1081         } while (time_after(end_time, jiffies));
1082         snd_printk(KERN_ERR SND_ML403_AC97CR_DRIVER ": "
1083                    "timeout while waiting for codec, "
1084                    "not ready!\n");
1085         return -EBUSY;
1086 }
1087
1088 static int snd_ml403_ac97cr_free(struct snd_ml403_ac97cr *ml403_ac97cr)
1089 {
1090         PDEBUG(INIT_INFO, "free():\n");
1091         /* irq release */
1092         if (ml403_ac97cr->irq >= 0)
1093                 free_irq(ml403_ac97cr->irq, ml403_ac97cr);
1094         if (ml403_ac97cr->capture_irq >= 0)
1095                 free_irq(ml403_ac97cr->capture_irq, ml403_ac97cr);
1096         /* give back "port" */
1097         if (ml403_ac97cr->port != NULL)
1098                 iounmap(ml403_ac97cr->port);
1099         kfree(ml403_ac97cr);
1100         PDEBUG(INIT_INFO, "free(): (done)\n");
1101         return 0;
1102 }
1103
1104 static int snd_ml403_ac97cr_dev_free(struct snd_device *snddev)
1105 {
1106         struct snd_ml403_ac97cr *ml403_ac97cr = snddev->device_data;
1107         PDEBUG(INIT_INFO, "dev_free():\n");
1108         return snd_ml403_ac97cr_free(ml403_ac97cr);
1109 }
1110
1111 static int
1112 snd_ml403_ac97cr_create(struct snd_card *card, struct platform_device *pfdev,
1113                         struct snd_ml403_ac97cr **rml403_ac97cr)
1114 {
1115         struct snd_ml403_ac97cr *ml403_ac97cr;
1116         int err;
1117         static struct snd_device_ops ops = {
1118                 .dev_free = snd_ml403_ac97cr_dev_free,
1119         };
1120         struct resource *resource;
1121         int irq;
1122
1123         *rml403_ac97cr = NULL;
1124         ml403_ac97cr = kzalloc(sizeof(*ml403_ac97cr), GFP_KERNEL);
1125         if (ml403_ac97cr == NULL)
1126                 return -ENOMEM;
1127         spin_lock_init(&ml403_ac97cr->reg_lock);
1128         mutex_init(&ml403_ac97cr->cdc_mutex);
1129         ml403_ac97cr->card = card;
1130         ml403_ac97cr->pfdev = pfdev;
1131         ml403_ac97cr->irq = -1;
1132         ml403_ac97cr->enable_irq = 0;
1133         ml403_ac97cr->capture_irq = -1;
1134         ml403_ac97cr->enable_capture_irq = 0;
1135         ml403_ac97cr->port = NULL;
1136         ml403_ac97cr->res_port = NULL;
1137
1138         PDEBUG(INIT_INFO, "Trying to reserve resources now ...\n");
1139         resource = platform_get_resource(pfdev, IORESOURCE_MEM, 0);
1140         /* get "port" */
1141         ml403_ac97cr->port = ioremap_nocache(resource->start,
1142                                              (resource->end) -
1143                                              (resource->start) + 1);
1144         if (ml403_ac97cr->port == NULL) {
1145                 snd_printk(KERN_ERR SND_ML403_AC97CR_DRIVER ": "
1146                            "unable to remap memory region (%pR)\n",
1147                            resource);
1148                 snd_ml403_ac97cr_free(ml403_ac97cr);
1149                 return -EBUSY;
1150         }
1151         snd_printk(KERN_INFO SND_ML403_AC97CR_DRIVER ": "
1152                    "remap controller memory region to "
1153                    "0x%x done\n", (unsigned int)ml403_ac97cr->port);
1154         /* get irq */
1155         irq = platform_get_irq(pfdev, 0);
1156         if (request_irq(irq, snd_ml403_ac97cr_irq, 0,
1157                         dev_name(&pfdev->dev), (void *)ml403_ac97cr)) {
1158                 snd_printk(KERN_ERR SND_ML403_AC97CR_DRIVER ": "
1159                            "unable to grab IRQ %d\n",
1160                            irq);
1161                 snd_ml403_ac97cr_free(ml403_ac97cr);
1162                 return -EBUSY;
1163         }
1164         ml403_ac97cr->irq = irq;
1165         snd_printk(KERN_INFO SND_ML403_AC97CR_DRIVER ": "
1166                    "request (playback) irq %d done\n",
1167                    ml403_ac97cr->irq);
1168         irq = platform_get_irq(pfdev, 1);
1169         if (request_irq(irq, snd_ml403_ac97cr_irq, 0,
1170                         dev_name(&pfdev->dev), (void *)ml403_ac97cr)) {
1171                 snd_printk(KERN_ERR SND_ML403_AC97CR_DRIVER ": "
1172                            "unable to grab IRQ %d\n",
1173                            irq);
1174                 snd_ml403_ac97cr_free(ml403_ac97cr);
1175                 return -EBUSY;
1176         }
1177         ml403_ac97cr->capture_irq = irq;
1178         snd_printk(KERN_INFO SND_ML403_AC97CR_DRIVER ": "
1179                    "request (capture) irq %d done\n",
1180                    ml403_ac97cr->capture_irq);
1181
1182         err = snd_ml403_ac97cr_chip_init(ml403_ac97cr);
1183         if (err < 0) {
1184                 snd_ml403_ac97cr_free(ml403_ac97cr);
1185                 return err;
1186         }
1187
1188         err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, ml403_ac97cr, &ops);
1189         if (err < 0) {
1190                 PDEBUG(INIT_FAILURE, "probe(): snd_device_new() failed!\n");
1191                 snd_ml403_ac97cr_free(ml403_ac97cr);
1192                 return err;
1193         }
1194
1195         *rml403_ac97cr = ml403_ac97cr;
1196         return 0;
1197 }
1198
1199 static void snd_ml403_ac97cr_mixer_free(struct snd_ac97 *ac97)
1200 {
1201         struct snd_ml403_ac97cr *ml403_ac97cr = ac97->private_data;
1202         PDEBUG(INIT_INFO, "mixer_free():\n");
1203         ml403_ac97cr->ac97 = NULL;
1204         PDEBUG(INIT_INFO, "mixer_free(): (done)\n");
1205 }
1206
1207 static int
1208 snd_ml403_ac97cr_mixer(struct snd_ml403_ac97cr *ml403_ac97cr)
1209 {
1210         struct snd_ac97_bus *bus;
1211         struct snd_ac97_template ac97;
1212         int err;
1213         static struct snd_ac97_bus_ops ops = {
1214                 .write = snd_ml403_ac97cr_codec_write,
1215                 .read = snd_ml403_ac97cr_codec_read,
1216         };
1217         PDEBUG(INIT_INFO, "mixer():\n");
1218         err = snd_ac97_bus(ml403_ac97cr->card, 0, &ops, NULL, &bus);
1219         if (err < 0)
1220                 return err;
1221
1222         memset(&ac97, 0, sizeof(ac97));
1223         ml403_ac97cr->ac97_fake = 1;
1224         lm4550_regfile_init();
1225 #ifdef CODEC_STAT
1226         ml403_ac97cr->ac97_read = 0;
1227         ml403_ac97cr->ac97_write = 0;
1228 #endif
1229         ac97.private_data = ml403_ac97cr;
1230         ac97.private_free = snd_ml403_ac97cr_mixer_free;
1231         ac97.scaps = AC97_SCAP_AUDIO | AC97_SCAP_SKIP_MODEM |
1232             AC97_SCAP_NO_SPDIF;
1233         err = snd_ac97_mixer(bus, &ac97, &ml403_ac97cr->ac97);
1234         ml403_ac97cr->ac97_fake = 0;
1235         lm4550_regfile_write_values_after_init(ml403_ac97cr->ac97);
1236         PDEBUG(INIT_INFO, "mixer(): (done) snd_ac97_mixer()=%d\n", err);
1237         return err;
1238 }
1239
1240 static int
1241 snd_ml403_ac97cr_pcm(struct snd_ml403_ac97cr *ml403_ac97cr, int device,
1242                      struct snd_pcm **rpcm)
1243 {
1244         struct snd_pcm *pcm;
1245         int err;
1246
1247         if (rpcm)
1248                 *rpcm = NULL;
1249         err = snd_pcm_new(ml403_ac97cr->card, "ML403AC97CR/1", device, 1, 1,
1250                           &pcm);
1251         if (err < 0)
1252                 return err;
1253         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
1254                         &snd_ml403_ac97cr_playback_ops);
1255         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE,
1256                         &snd_ml403_ac97cr_capture_ops);
1257         pcm->private_data = ml403_ac97cr;
1258         pcm->info_flags = 0;
1259         strcpy(pcm->name, "ML403AC97CR DAC/ADC");
1260         ml403_ac97cr->pcm = pcm;
1261
1262         snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_CONTINUOUS,
1263                                           snd_dma_continuous_data(GFP_KERNEL),
1264                                           64 * 1024,
1265                                           128 * 1024);
1266         if (rpcm)
1267                 *rpcm = pcm;
1268         return 0;
1269 }
1270
1271 static int snd_ml403_ac97cr_probe(struct platform_device *pfdev)
1272 {
1273         struct snd_card *card;
1274         struct snd_ml403_ac97cr *ml403_ac97cr = NULL;
1275         int err;
1276         int dev = pfdev->id;
1277
1278         if (dev >= SNDRV_CARDS)
1279                 return -ENODEV;
1280         if (!enable[dev])
1281                 return -ENOENT;
1282
1283         err = snd_card_new(&pfdev->dev, index[dev], id[dev], THIS_MODULE,
1284                            0, &card);
1285         if (err < 0)
1286                 return err;
1287         err = snd_ml403_ac97cr_create(card, pfdev, &ml403_ac97cr);
1288         if (err < 0) {
1289                 PDEBUG(INIT_FAILURE, "probe(): create failed!\n");
1290                 snd_card_free(card);
1291                 return err;
1292         }
1293         PDEBUG(INIT_INFO, "probe(): create done\n");
1294         card->private_data = ml403_ac97cr;
1295         err = snd_ml403_ac97cr_mixer(ml403_ac97cr);
1296         if (err < 0) {
1297                 snd_card_free(card);
1298                 return err;
1299         }
1300         PDEBUG(INIT_INFO, "probe(): mixer done\n");
1301         err = snd_ml403_ac97cr_pcm(ml403_ac97cr, 0, NULL);
1302         if (err < 0) {
1303                 snd_card_free(card);
1304                 return err;
1305         }
1306         PDEBUG(INIT_INFO, "probe(): PCM done\n");
1307         strcpy(card->driver, SND_ML403_AC97CR_DRIVER);
1308         strcpy(card->shortname, "ML403 AC97 Controller Reference");
1309         sprintf(card->longname, "%s %s at 0x%lx, irq %i & %i, device %i",
1310                 card->shortname, card->driver,
1311                 (unsigned long)ml403_ac97cr->port, ml403_ac97cr->irq,
1312                 ml403_ac97cr->capture_irq, dev + 1);
1313
1314         err = snd_card_register(card);
1315         if (err < 0) {
1316                 snd_card_free(card);
1317                 return err;
1318         }
1319         platform_set_drvdata(pfdev, card);
1320         PDEBUG(INIT_INFO, "probe(): (done)\n");
1321         return 0;
1322 }
1323
1324 static int snd_ml403_ac97cr_remove(struct platform_device *pfdev)
1325 {
1326         snd_card_free(platform_get_drvdata(pfdev));
1327         return 0;
1328 }
1329
1330 /* work with hotplug and coldplug */
1331 MODULE_ALIAS("platform:" SND_ML403_AC97CR_DRIVER);
1332
1333 static struct platform_driver snd_ml403_ac97cr_driver = {
1334         .probe = snd_ml403_ac97cr_probe,
1335         .remove = snd_ml403_ac97cr_remove,
1336         .driver = {
1337                 .name = SND_ML403_AC97CR_DRIVER,
1338         },
1339 };
1340
1341 module_platform_driver(snd_ml403_ac97cr_driver);