git.oblomov.eu Git - linux-2.6/blob - sound/oss/ali5455.c

   1 /*
   2  *      ALI  ali5455 and friends ICH driver for Linux
   3  *      LEI HU <Lei_Hu@ali.com.tw>
   4  *
   5  *  Built from:
   6  *      drivers/sound/i810_audio
   7  *
   8  *      The ALi 5455 is similar but not quite identical to the Intel ICH
   9  *      series of controllers. Its easier to keep the driver separated from
  10  *      the i810 driver.
  11  *
  12  *      This program is free software; you can redistribute it and/or modify
  13  *      it under the terms of the GNU General Public License as published by
  14  *      the Free Software Foundation; either version 2 of the License, or
  15  *      (at your option) any later version.
  16  *
  17  *      This program is distributed in the hope that it will be useful,
  18  *      but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  *      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  *      GNU General Public License for more details.
  21  *
  22  *      You should have received a copy of the GNU General Public License
  23  *      along with this program; if not, write to the Free Software
  24  *      Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  25  *
  26  *
  27  *      ALi 5455 theory of operation
  28  *
  29  *      The chipset provides three DMA channels that talk to an AC97
  30  *      CODEC (AC97 is a digital/analog mixer standard). At its simplest
  31  *      you get 48Khz audio with basic volume and mixer controls. At the
  32  *      best you get rate adaption in the codec. We set the card up so
  33  *      that we never take completion interrupts but instead keep the card
  34  *      chasing its tail around a ring buffer. This is needed for mmap
  35  *      mode audio and happens to work rather well for non-mmap modes too.
  36  *
  37  *      The board has one output channel for PCM audio (supported) and
  38  *      a stereo line in and mono microphone input. Again these are normally
  39  *      locked to 48Khz only. Right now recording is not finished.
  40  *
  41  *      There is no midi support, no synth support. Use timidity. To get
  42  *      esd working you need to use esd -r 48000 as it won't probe 48KHz
  43  *      by default. mpg123 can't handle 48Khz only audio so use xmms.
  44  *
  45  *      If you need to force a specific rate set the clocking= option
  46  *
  47  */
  48
  49 #include <linux/module.h>
  50 #include <linux/string.h>
  51 #include <linux/ctype.h>
  52 #include <linux/ioport.h>
  53 #include <linux/sched.h>
  54 #include <linux/delay.h>
  55 #include <linux/sound.h>
  56 #include <linux/slab.h>
  57 #include <linux/soundcard.h>
  58 #include <linux/pci.h>
  59 #include <asm/io.h>
  60 #include <asm/dma.h>
  61 #include <linux/init.h>
  62 #include <linux/poll.h>
  63 #include <linux/spinlock.h>
  64 #include <linux/smp_lock.h>
  65 #include <linux/ac97_codec.h>
  66 #include <linux/interrupt.h>
  67 #include <linux/mutex.h>
  68
  69 #include <asm/uaccess.h>
  70
  71 #ifndef PCI_DEVICE_ID_ALI_5455
  72 #define PCI_DEVICE_ID_ALI_5455  0x5455
  73 #endif
  74
  75 #ifndef PCI_VENDOR_ID_ALI
  76 #define PCI_VENDOR_ID_ALI       0x10b9
  77 #endif
  78
  79 static int strict_clocking = 0;
  80 static unsigned int clocking = 0;
  81 static unsigned int codec_pcmout_share_spdif_locked = 0;
  82 static unsigned int codec_independent_spdif_locked = 0;
  83 static unsigned int controller_pcmout_share_spdif_locked = 0;
  84 static unsigned int controller_independent_spdif_locked = 0;
  85 static unsigned int globel = 0;
  86
  87 #define ADC_RUNNING     1
  88 #define DAC_RUNNING     2
  89 #define CODEC_SPDIFOUT_RUNNING 8
  90 #define CONTROLLER_SPDIFOUT_RUNNING 4
  91
  92 #define SPDIF_ENABLE_OUTPUT     4       /* bits 0,1 are PCM */
  93
  94 #define ALI5455_FMT_16BIT       1
  95 #define ALI5455_FMT_STEREO      2
  96 #define ALI5455_FMT_MASK        3
  97
  98 #define SPDIF_ON        0x0004
  99 #define SURR_ON         0x0010
 100 #define CENTER_LFE_ON   0x0020
 101 #define VOL_MUTED       0x8000
 102
 103
 104 #define ALI_SPDIF_OUT_CH_STATUS 0xbf
 105 /* the 810's array of pointers to data buffers */
 106
 107 struct sg_item {
 108 #define BUSADDR_MASK    0xFFFFFFFE
 109         u32 busaddr;
 110 #define CON_IOC         0x80000000      /* interrupt on completion */
 111 #define CON_BUFPAD      0x40000000      /* pad underrun with last sample, else 0 */
 112 #define CON_BUFLEN_MASK 0x0000ffff      /* buffer length in samples */
 113         u32 control;
 114 };
 115
 116 /* an instance of the ali channel */
 117 #define SG_LEN 32
 118 struct ali_channel {
 119         /* these sg guys should probably be allocated
 120            separately as nocache. Must be 8 byte aligned */
 121         struct sg_item sg[SG_LEN];      /* 32*8 */
 122         u32 offset;             /* 4 */
 123         u32 port;               /* 4 */
 124         u32 used;
 125         u32 num;
 126 };
 127
 128 /*
 129  * we have 3 separate dma engines.  pcm in, pcm out, and mic.
 130  * each dma engine has controlling registers.  These goofy
 131  * names are from the datasheet, but make it easy to write
 132  * code while leafing through it.
 133  */
 134
 135 #define ENUM_ENGINE(PRE,DIG)                                                                    \
 136 enum {                                                                                          \
 137         PRE##_BDBAR =   0x##DIG##0,             /* Buffer Descriptor list Base Address */       \
 138         PRE##_CIV =     0x##DIG##4,             /* Current Index Value */                       \
 139         PRE##_LVI =     0x##DIG##5,             /* Last Valid Index */                          \
 140         PRE##_SR =      0x##DIG##6,             /* Status Register */                           \
 141         PRE##_PICB =    0x##DIG##8,             /* Position In Current Buffer */                \
 142         PRE##_CR =      0x##DIG##b              /* Control Register */                          \
 143 }
 144
 145 ENUM_ENGINE(OFF, 0);            /* Offsets */
 146 ENUM_ENGINE(PI, 4);             /* PCM In */
 147 ENUM_ENGINE(PO, 5);             /* PCM Out */
 148 ENUM_ENGINE(MC, 6);             /* Mic In */
 149 ENUM_ENGINE(CODECSPDIFOUT, 7);  /* CODEC SPDIF OUT  */
 150 ENUM_ENGINE(CONTROLLERSPDIFIN, A);      /* CONTROLLER SPDIF In */
 151 ENUM_ENGINE(CONTROLLERSPDIFOUT, B);     /* CONTROLLER SPDIF OUT */
 152
 153
 154 enum {
 155         ALI_SCR = 0x00,         /* System Control Register */
 156         ALI_SSR = 0x04,         /* System Status Register  */
 157         ALI_DMACR = 0x08,       /* DMA Control Register    */
 158         ALI_FIFOCR1 = 0x0c,     /* FIFO Control Register 1  */
 159         ALI_INTERFACECR = 0x10, /* Interface Control Register */
 160         ALI_INTERRUPTCR = 0x14, /* Interrupt control Register */
 161         ALI_INTERRUPTSR = 0x18, /* Interrupt  Status Register */
 162         ALI_FIFOCR2 = 0x1c,     /* FIFO Control Register 2   */
 163         ALI_CPR = 0x20,         /* Command Port Register     */
 164         ALI_SPR = 0x24,         /* Status Port Register      */
 165         ALI_FIFOCR3 = 0x2c,     /* FIFO Control Register 3  */
 166         ALI_TTSR = 0x30,        /* Transmit Tag Slot Register */
 167         ALI_RTSR = 0x34,        /* Receive Tag Slot  Register */
 168         ALI_CSPSR = 0x38,       /* Command/Status Port Status Register */
 169         ALI_CAS = 0x3c,         /* Codec Write Semaphore Register */
 170         ALI_SPDIFCSR = 0xf8,    /* spdif channel status register  */
 171         ALI_SPDIFICS = 0xfc     /* spdif interface control/status  */
 172 };
 173
 174 // x-status register(x:pcm in ,pcm out, mic in,)
 175 /* interrupts for a dma engine */
 176 #define DMA_INT_FIFO            (1<<4)  /* fifo under/over flow */
 177 #define DMA_INT_COMPLETE        (1<<3)  /* buffer read/write complete and ioc set */
 178 #define DMA_INT_LVI             (1<<2)  /* last valid done */
 179 #define DMA_INT_CELV            (1<<1)  /* last valid is current */
 180 #define DMA_INT_DCH             (1)     /* DMA Controller Halted (happens on LVI interrupts) */ //not eqult intel
 181 #define DMA_INT_MASK (DMA_INT_FIFO|DMA_INT_COMPLETE|DMA_INT_LVI)
 182
 183 /* interrupts for the whole chip */// by interrupt status register finish
 184
 185 #define INT_SPDIFOUT   (1<<23)  /* controller spdif out INTERRUPT */
 186 #define INT_SPDIFIN   (1<<22)
 187 #define INT_CODECSPDIFOUT   (1<<19)
 188 #define INT_MICIN   (1<<18)
 189 #define INT_PCMOUT   (1<<17)
 190 #define INT_PCMIN   (1<<16)
 191 #define INT_CPRAIS   (1<<7)
 192 #define INT_SPRAIS   (1<<5)
 193 #define INT_GPIO    (1<<1)
 194 #define INT_MASK   (INT_SPDIFOUT|INT_CODECSPDIFOUT|INT_MICIN|INT_PCMOUT|INT_PCMIN)
 195
 196 #define DRIVER_VERSION "0.02ac"
 197
 198 /* magic numbers to protect our data structures */
 199 #define ALI5455_CARD_MAGIC              0x5072696E      /* "Prin" */
 200 #define ALI5455_STATE_MAGIC             0x63657373      /* "cess" */
 201 #define ALI5455_DMA_MASK                0xffffffff      /* DMA buffer mask for pci_alloc_consist */
 202 #define NR_HW_CH                        5       //I think 5 channel
 203
 204 /* maxinum number of AC97 codecs connected, AC97 2.0 defined 4 */
 205 #define NR_AC97         2
 206
 207 /* Please note that an 8bit mono stream is not valid on this card, you must have a 16bit */
 208 /* stream at a minimum for this card to be happy */
 209 static const unsigned sample_size[] = { 1, 2, 2, 4 };
 210 /* Samples are 16bit values, so we are shifting to a word, not to a byte, hence shift */
 211 /* values are one less than might be expected */
 212 static const unsigned sample_shift[] = { -1, 0, 0, 1 };
 213
 214 #define ALI5455
 215 static char *card_names[] = {
 216         "ALI 5455"
 217 };
 218
 219 static struct pci_device_id ali_pci_tbl[] = {
 220         {PCI_VENDOR_ID_ALI, PCI_DEVICE_ID_ALI_5455,
 221          PCI_ANY_ID, PCI_ANY_ID, 0, 0, ALI5455},
 222         {0,}
 223 };
 224
 225 MODULE_DEVICE_TABLE(pci, ali_pci_tbl);
 226
 227 #ifdef CONFIG_PM
 228 #define PM_SUSPENDED(card) (card->pm_suspended)
 229 #else
 230 #define PM_SUSPENDED(card) (0)
 231 #endif
 232
 233 /* "software" or virtual channel, an instance of opened /dev/dsp */
 234 struct ali_state {
 235         unsigned int magic;
 236         struct ali_card *card;  /* Card info */
 237
 238         /* single open lock mechanism, only used for recording */
 239         struct mutex open_mutex;
 240         wait_queue_head_t open_wait;
 241
 242         /* file mode */
 243         mode_t open_mode;
 244
 245         /* virtual channel number */
 246         int virt;
 247
 248 #ifdef CONFIG_PM
 249         unsigned int pm_saved_dac_rate, pm_saved_adc_rate;
 250 #endif
 251         struct dmabuf {
 252                 /* wave sample stuff */
 253                 unsigned int rate;
 254                 unsigned char fmt, enable, trigger;
 255
 256                 /* hardware channel */
 257                 struct ali_channel *read_channel;
 258                 struct ali_channel *write_channel;
 259                 struct ali_channel *codec_spdifout_channel;
 260                 struct ali_channel *controller_spdifout_channel;
 261
 262                 /* OSS buffer management stuff */
 263                 void *rawbuf;
 264                 dma_addr_t dma_handle;
 265                 unsigned buforder;
 266                 unsigned numfrag;
 267                 unsigned fragshift;
 268
 269                 /* our buffer acts like a circular ring */
 270                 unsigned hwptr; /* where dma last started, updated by update_ptr */
 271                 unsigned swptr; /* where driver last clear/filled, updated by read/write */
 272                 int count;      /* bytes to be consumed or been generated by dma machine */
 273                 unsigned total_bytes;   /* total bytes dmaed by hardware */
 274
 275                 unsigned error; /* number of over/underruns */
 276                 wait_queue_head_t wait; /* put process on wait queue when no more space in buffer */
 277
 278                 /* redundant, but makes calculations easier */
 279                 /* what the hardware uses */
 280                 unsigned dmasize;
 281                 unsigned fragsize;
 282                 unsigned fragsamples;
 283
 284                 /* what we tell the user to expect */
 285                 unsigned userfrags;
 286                 unsigned userfragsize;
 287
 288                 /* OSS stuff */
 289                 unsigned mapped:1;
 290                 unsigned ready:1;
 291                 unsigned update_flag;
 292                 unsigned ossfragsize;
 293                 unsigned ossmaxfrags;
 294                 unsigned subdivision;
 295         } dmabuf;
 296 };
 297
 298
 299 struct ali_card {
 300         struct ali_channel channel[5];
 301         unsigned int magic;
 302
 303         /* We keep ali5455 cards in a linked list */
 304         struct ali_card *next;
 305
 306         /* The ali has a certain amount of cross channel interaction
 307            so we use a single per card lock */
 308         spinlock_t lock;
 309         spinlock_t ac97_lock;
 310
 311         /* PCI device stuff */
 312         struct pci_dev *pci_dev;
 313         u16 pci_id;
 314 #ifdef CONFIG_PM
 315         u16 pm_suspended;
 316         int pm_saved_mixer_settings[SOUND_MIXER_NRDEVICES][NR_AC97];
 317 #endif
 318         /* soundcore stuff */
 319         int dev_audio;
 320
 321         /* structures for abstraction of hardware facilities, codecs, banks and channels */
 322         struct ac97_codec *ac97_codec[NR_AC97];
 323         struct ali_state *states[NR_HW_CH];
 324
 325         u16 ac97_features;
 326         u16 ac97_status;
 327         u16 channels;
 328
 329         /* hardware resources */
 330         unsigned long iobase;
 331
 332         u32 irq;
 333
 334         /* Function support */
 335         struct ali_channel *(*alloc_pcm_channel) (struct ali_card *);
 336         struct ali_channel *(*alloc_rec_pcm_channel) (struct ali_card *);
 337         struct ali_channel *(*alloc_rec_mic_channel) (struct ali_card *);
 338         struct ali_channel *(*alloc_codec_spdifout_channel) (struct ali_card *);
 339         struct ali_channel *(*alloc_controller_spdifout_channel) (struct  ali_card *);
 340         void (*free_pcm_channel) (struct ali_card *, int chan);
 341
 342         /* We have a *very* long init time possibly, so use this to block */
 343         /* attempts to open our devices before we are ready (stops oops'es) */
 344         int initializing;
 345 };
 346
 347
 348 static struct ali_card *devs = NULL;
 349
 350 static int ali_open_mixdev(struct inode *inode, struct file *file);
 351 static int ali_ioctl_mixdev(struct inode *inode, struct file *file,
 352                             unsigned int cmd, unsigned long arg);
 353 static u16 ali_ac97_get(struct ac97_codec *dev, u8 reg);
 354 static void ali_ac97_set(struct ac97_codec *dev, u8 reg, u16 data);
 355
 356 static struct ali_channel *ali_alloc_pcm_channel(struct ali_card *card)
 357 {
 358         if (card->channel[1].used == 1)
 359                 return NULL;
 360         card->channel[1].used = 1;
 361         return &card->channel[1];
 362 }
 363
 364 static struct ali_channel *ali_alloc_rec_pcm_channel(struct ali_card *card)
 365 {
 366         if (card->channel[0].used == 1)
 367                 return NULL;
 368         card->channel[0].used = 1;
 369         return &card->channel[0];
 370 }
 371
 372 static struct ali_channel *ali_alloc_rec_mic_channel(struct ali_card *card)
 373 {
 374         if (card->channel[2].used == 1)
 375                 return NULL;
 376         card->channel[2].used = 1;
 377         return &card->channel[2];
 378 }
 379
 380 static struct ali_channel *ali_alloc_codec_spdifout_channel(struct ali_card *card)
 381 {
 382         if (card->channel[3].used == 1)
 383                 return NULL;
 384         card->channel[3].used = 1;
 385         return &card->channel[3];
 386 }
 387
 388 static struct ali_channel *ali_alloc_controller_spdifout_channel(struct ali_card *card)
 389 {
 390         if (card->channel[4].used == 1)
 391                 return NULL;
 392         card->channel[4].used = 1;
 393         return &card->channel[4];
 394 }
 395 static void ali_free_pcm_channel(struct ali_card *card, int channel)
 396 {
 397         card->channel[channel].used = 0;
 398 }
 399
 400
 401 //add support  codec spdif out
 402 static int ali_valid_spdif_rate(struct ac97_codec *codec, int rate)
 403 {
 404         unsigned long id = 0L;
 405
 406         id = (ali_ac97_get(codec, AC97_VENDOR_ID1) << 16);
 407         id |= ali_ac97_get(codec, AC97_VENDOR_ID2) & 0xffff;
 408         switch (id) {
 409         case 0x41445361:        /* AD1886 */
 410                 if (rate == 48000) {
 411                         return 1;
 412                 }
 413                 break;
 414         case 0x414c4720:        /* ALC650 */
 415                 if (rate == 48000) {
 416                         return 1;
 417                 }
 418                 break;
 419         default:                /* all other codecs, until we know otherwiae */
 420                 if (rate == 48000 || rate == 44100 || rate == 32000) {
 421                         return 1;
 422                 }
 423                 break;
 424         }
 425         return (0);
 426 }
 427
 428 /* ali_set_spdif_output
 429  *
 430  *  Configure the S/PDIF output transmitter. When we turn on
 431  *  S/PDIF, we turn off the analog output. This may not be
 432  *  the right thing to do.
 433  *
 434  *  Assumptions:
 435  *     The DSP sample rate must already be set to a supported
 436  *     S/PDIF rate (32kHz, 44.1kHz, or 48kHz) or we abort.
 437  */
 438 static void ali_set_spdif_output(struct ali_state *state, int slots,
 439                                  int rate)
 440 {
 441         int vol;
 442         int aud_reg;
 443         struct ac97_codec *codec = state->card->ac97_codec[0];
 444
 445         if (!(state->card->ac97_features & 4)) {
 446                 state->card->ac97_status &= ~SPDIF_ON;
 447         } else {
 448                 if (slots == -1) {      /* Turn off S/PDIF */
 449                         aud_reg = ali_ac97_get(codec, AC97_EXTENDED_STATUS);
 450                         ali_ac97_set(codec, AC97_EXTENDED_STATUS, (aud_reg & ~AC97_EA_SPDIF));
 451
 452                         /* If the volume wasn't muted before we turned on S/PDIF, unmute it */
 453                         if (!(state->card->ac97_status & VOL_MUTED)) {
 454                                 aud_reg = ali_ac97_get(codec, AC97_MASTER_VOL_STEREO);
 455                                 ali_ac97_set(codec, AC97_MASTER_VOL_STEREO,
 456                                              (aud_reg & ~VOL_MUTED));
 457                         }
 458                         state->card->ac97_status &= ~(VOL_MUTED | SPDIF_ON);
 459                         return;
 460                 }
 461
 462                 vol = ali_ac97_get(codec, AC97_MASTER_VOL_STEREO);
 463                 state->card->ac97_status = vol & VOL_MUTED;
 464
 465                 /* Set S/PDIF transmitter sample rate */
 466                 aud_reg = ali_ac97_get(codec, AC97_SPDIF_CONTROL);
 467                 switch (rate) {
 468                 case 32000:
 469                         aud_reg = (aud_reg & AC97_SC_SPSR_MASK) | AC97_SC_SPSR_32K;
 470                         break;
 471                 case 44100:
 472                         aud_reg = (aud_reg & AC97_SC_SPSR_MASK) | AC97_SC_SPSR_44K;
 473                         break;
 474                 case 48000:
 475                         aud_reg = (aud_reg & AC97_SC_SPSR_MASK) | AC97_SC_SPSR_48K;
 476                         break;
 477                 default:
 478                         /* turn off S/PDIF */
 479                         aud_reg = ali_ac97_get(codec, AC97_EXTENDED_STATUS);
 480                         ali_ac97_set(codec, AC97_EXTENDED_STATUS, (aud_reg & ~AC97_EA_SPDIF));
 481                         state->card->ac97_status &= ~SPDIF_ON;
 482                         return;
 483                 }
 484
 485                 ali_ac97_set(codec, AC97_SPDIF_CONTROL, aud_reg);
 486
 487                 aud_reg = ali_ac97_get(codec, AC97_EXTENDED_STATUS);
 488                 aud_reg = (aud_reg & AC97_EA_SLOT_MASK) | slots | AC97_EA_SPDIF;
 489                 ali_ac97_set(codec, AC97_EXTENDED_STATUS, aud_reg);
 490
 491                 aud_reg = ali_ac97_get(codec, AC97_POWER_CONTROL);
 492                 aud_reg |= 0x0002;
 493                 ali_ac97_set(codec, AC97_POWER_CONTROL, aud_reg);
 494                 udelay(1);
 495
 496                 state->card->ac97_status |= SPDIF_ON;
 497
 498                 /* Check to make sure the configuration is valid */
 499                 aud_reg = ali_ac97_get(codec, AC97_EXTENDED_STATUS);
 500                 if (!(aud_reg & 0x0400)) {
 501                         /* turn off S/PDIF */
 502                         ali_ac97_set(codec, AC97_EXTENDED_STATUS, (aud_reg & ~AC97_EA_SPDIF));
 503                         state->card->ac97_status &= ~SPDIF_ON;
 504                         return;
 505                 }
 506                 if (codec_independent_spdif_locked > 0) {
 507                         aud_reg = ali_ac97_get(codec, 0x6a);
 508                         ali_ac97_set(codec, 0x6a, (aud_reg & 0xefff));
 509                 }
 510                 /* Mute the analog output */
 511                 /* Should this only mute the PCM volume??? */
 512         }
 513 }
 514
 515 /* ali_set_dac_channels
 516  *
 517  *  Configure the codec's multi-channel DACs
 518  *
 519  *  The logic is backwards. Setting the bit to 1 turns off the DAC.
 520  *
 521  *  What about the ICH? We currently configure it using the
 522  *  SNDCTL_DSP_CHANNELS ioctl.  If we're turnning on the DAC,
 523  *  does that imply that we want the ICH set to support
 524  *  these channels?
 525  *
 526  *  TODO:
 527  *    vailidate that the codec really supports these DACs
 528  *    before turning them on.
 529  */
 530 static void ali_set_dac_channels(struct ali_state *state, int channel)
 531 {
 532         int aud_reg;
 533         struct ac97_codec *codec = state->card->ac97_codec[0];
 534
 535         aud_reg = ali_ac97_get(codec, AC97_EXTENDED_STATUS);
 536         aud_reg |= AC97_EA_PRI | AC97_EA_PRJ | AC97_EA_PRK;
 537         state->card->ac97_status &= ~(SURR_ON | CENTER_LFE_ON);
 538
 539         switch (channel) {
 540         case 2:         /* always enabled */
 541                 break;
 542         case 4:
 543                 aud_reg &= ~AC97_EA_PRJ;
 544                 state->card->ac97_status |= SURR_ON;
 545                 break;
 546         case 6:
 547                 aud_reg &= ~(AC97_EA_PRJ | AC97_EA_PRI | AC97_EA_PRK);
 548                 state->card->ac97_status |= SURR_ON | CENTER_LFE_ON;
 549                 break;
 550         default:
 551                 break;
 552         }
 553         ali_ac97_set(codec, AC97_EXTENDED_STATUS, aud_reg);
 554
 555 }
 556
 557 /* set playback sample rate */
 558 static unsigned int ali_set_dac_rate(struct ali_state *state,
 559                                      unsigned int rate)
 560 {
 561         struct dmabuf *dmabuf = &state->dmabuf;
 562         u32 new_rate;
 563         struct ac97_codec *codec = state->card->ac97_codec[0];
 564
 565         if (!(state->card->ac97_features & 0x0001)) {
 566                 dmabuf->rate = clocking;
 567                 return clocking;
 568         }
 569
 570         if (rate > 48000)
 571                 rate = 48000;
 572         if (rate < 8000)
 573                 rate = 8000;
 574         dmabuf->rate = rate;
 575
 576         /*
 577          *      Adjust for misclocked crap
 578          */
 579
 580         rate = (rate * clocking) / 48000;
 581
 582         if (strict_clocking && rate < 8000) {
 583                 rate = 8000;
 584                 dmabuf->rate = (rate * 48000) / clocking;
 585         }
 586
 587         new_rate = ac97_set_dac_rate(codec, rate);
 588         if (new_rate != rate) {
 589                 dmabuf->rate = (new_rate * 48000) / clocking;
 590         }
 591         rate = new_rate;
 592         return dmabuf->rate;
 593 }
 594
 595 /* set recording sample rate */
 596 static unsigned int ali_set_adc_rate(struct ali_state *state,
 597                                      unsigned int rate)
 598 {
 599         struct dmabuf *dmabuf = &state->dmabuf;
 600         u32 new_rate;
 601         struct ac97_codec *codec = state->card->ac97_codec[0];
 602
 603         if (!(state->card->ac97_features & 0x0001)) {
 604                 dmabuf->rate = clocking;
 605                 return clocking;
 606         }
 607
 608         if (rate > 48000)
 609                 rate = 48000;
 610         if (rate < 8000)
 611                 rate = 8000;
 612         dmabuf->rate = rate;
 613
 614         /*
 615          *      Adjust for misclocked crap
 616          */
 617
 618         rate = (rate * clocking) / 48000;
 619         if (strict_clocking && rate < 8000) {
 620                 rate = 8000;
 621                 dmabuf->rate = (rate * 48000) / clocking;
 622         }
 623
 624         new_rate = ac97_set_adc_rate(codec, rate);
 625
 626         if (new_rate != rate) {
 627                 dmabuf->rate = (new_rate * 48000) / clocking;
 628                 rate = new_rate;
 629         }
 630         return dmabuf->rate;
 631 }
 632
 633 /* set codec independent spdifout sample rate */
 634 static unsigned int ali_set_codecspdifout_rate(struct ali_state *state,
 635                                                unsigned int rate)
 636 {
 637         struct dmabuf *dmabuf = &state->dmabuf;
 638
 639         if (!(state->card->ac97_features & 0x0001)) {
 640                 dmabuf->rate = clocking;
 641                 return clocking;
 642         }
 643
 644         if (rate > 48000)
 645                 rate = 48000;
 646         if (rate < 8000)
 647                 rate = 8000;
 648         dmabuf->rate = rate;
 649
 650         return dmabuf->rate;
 651 }
 652
 653 /* set  controller independent spdif out function sample rate */
 654 static void ali_set_spdifout_rate(struct ali_state *state,
 655                                   unsigned int rate)
 656 {
 657         unsigned char ch_st_sel;
 658         unsigned short status_rate;
 659
 660         switch (rate) {
 661         case 44100:
 662                 status_rate = 0;
 663                 break;
 664         case 32000:
 665                 status_rate = 0x300;
 666                 break;
 667         case 48000:
 668         default:
 669                 status_rate = 0x200;
 670                 break;
 671         }
 672
 673         ch_st_sel = inb(state->card->iobase + ALI_SPDIFICS) & ALI_SPDIF_OUT_CH_STATUS;  //select spdif_out
 674
 675         ch_st_sel |= 0x80;      //select right
 676         outb(ch_st_sel, (state->card->iobase + ALI_SPDIFICS));
 677         outb(status_rate | 0x20, (state->card->iobase + ALI_SPDIFCSR + 2));
 678
 679         ch_st_sel &= (~0x80);   //select left
 680         outb(ch_st_sel, (state->card->iobase + ALI_SPDIFICS));
 681         outw(status_rate | 0x10, (state->card->iobase + ALI_SPDIFCSR + 2));
 682 }
 683
 684 /* get current playback/recording dma buffer pointer (byte offset from LBA),
 685    called with spinlock held! */
 686
 687 static inline unsigned ali_get_dma_addr(struct ali_state *state, int rec)
 688 {
 689         struct dmabuf *dmabuf = &state->dmabuf;
 690         unsigned int civ, offset, port, port_picb;
 691         unsigned int data;
 692
 693         if (!dmabuf->enable)
 694                 return 0;
 695
 696         if (rec == 1)
 697                 port = state->card->iobase + dmabuf->read_channel->port;
 698         else if (rec == 2)
 699                 port = state->card->iobase + dmabuf->codec_spdifout_channel->port;
 700         else if (rec == 3)
 701                 port = state->card->iobase + dmabuf->controller_spdifout_channel->port;
 702         else
 703                 port = state->card->iobase + dmabuf->write_channel->port;
 704
 705         port_picb = port + OFF_PICB;
 706
 707         do {
 708                 civ = inb(port + OFF_CIV) & 31;
 709                 offset = inw(port_picb);
 710                 /* Must have a delay here! */
 711                 if (offset == 0)
 712                         udelay(1);
 713
 714                 /* Reread both registers and make sure that that total
 715                  * offset from the first reading to the second is 0.
 716                  * There is an issue with SiS hardware where it will count
 717                  * picb down to 0, then update civ to the next value,
 718                  * then set the new picb to fragsize bytes.  We can catch
 719                  * it between the civ update and the picb update, making
 720                  * it look as though we are 1 fragsize ahead of where we
 721                  * are.  The next to we get the address though, it will
 722                  * be back in thdelay is more than long enough
 723                  * that we won't have to worry about the chip still being
 724                  * out of sync with reality ;-)
 725                  */
 726         } while (civ != (inb(port + OFF_CIV) & 31) || offset != inw(port_picb));
 727
 728         data = ((civ + 1) * dmabuf->fragsize - (2 * offset)) % dmabuf->dmasize;
 729         if (inw(port_picb) == 0)
 730                 data -= 2048;
 731
 732         return data;
 733 }
 734
 735 /* Stop recording (lock held) */
 736 static inline void __stop_adc(struct ali_state *state)
 737 {
 738         struct dmabuf *dmabuf = &state->dmabuf;
 739         struct ali_card *card = state->card;
 740
 741         dmabuf->enable &= ~ADC_RUNNING;
 742
 743         outl((1 << 18) | (1 << 16), card->iobase + ALI_DMACR);
 744         udelay(1);
 745
 746         outb(0, card->iobase + PI_CR);
 747         while (inb(card->iobase + PI_CR) != 0);
 748
 749         // now clear any latent interrupt bits (like the halt bit)
 750         outb(inb(card->iobase + PI_SR) | 0x001e, card->iobase + PI_SR);
 751         outl(inl(card->iobase + ALI_INTERRUPTSR) & INT_PCMIN, card->iobase + ALI_INTERRUPTSR);
 752 }
 753
 754 static void stop_adc(struct ali_state *state)
 755 {
 756         struct ali_card *card = state->card;
 757         unsigned long flags;
 758         spin_lock_irqsave(&card->lock, flags);
 759         __stop_adc(state);
 760         spin_unlock_irqrestore(&card->lock, flags);
 761 }
 762
 763 static inline void __start_adc(struct ali_state *state)
 764 {
 765         struct dmabuf *dmabuf = &state->dmabuf;
 766
 767         if (dmabuf->count < dmabuf->dmasize && dmabuf->ready
 768             && !dmabuf->enable && (dmabuf->trigger & PCM_ENABLE_INPUT)) {
 769                 dmabuf->enable |= ADC_RUNNING;
 770                 outb((1 << 4) | (1 << 2), state->card->iobase + PI_CR);
 771                 if (state->card->channel[0].used == 1)
 772                         outl(1, state->card->iobase + ALI_DMACR);       // DMA CONTROL REGISTRER
 773                 udelay(100);
 774                 if (state->card->channel[2].used == 1)
 775                         outl((1 << 2), state->card->iobase + ALI_DMACR);        //DMA CONTROL REGISTER
 776                 udelay(100);
 777         }
 778 }
 779
 780 static void start_adc(struct ali_state *state)
 781 {
 782         struct ali_card *card = state->card;
 783         unsigned long flags;
 784
 785         spin_lock_irqsave(&card->lock, flags);
 786         __start_adc(state);
 787         spin_unlock_irqrestore(&card->lock, flags);
 788 }
 789
 790 /* stop playback (lock held) */
 791 static inline void __stop_dac(struct ali_state *state)
 792 {
 793         struct dmabuf *dmabuf = &state->dmabuf;
 794         struct ali_card *card = state->card;
 795
 796         dmabuf->enable &= ~DAC_RUNNING;
 797         outl(0x00020000, card->iobase + 0x08);
 798         outb(0, card->iobase + PO_CR);
 799         while (inb(card->iobase + PO_CR) != 0)
 800                 cpu_relax();
 801
 802         outb(inb(card->iobase + PO_SR) | 0x001e, card->iobase + PO_SR);
 803
 804         outl(inl(card->iobase + ALI_INTERRUPTSR) & INT_PCMOUT, card->iobase + ALI_INTERRUPTSR);
 805 }
 806
 807 static void stop_dac(struct ali_state *state)
 808 {
 809         struct ali_card *card = state->card;
 810         unsigned long flags;
 811         spin_lock_irqsave(&card->lock, flags);
 812         __stop_dac(state);
 813         spin_unlock_irqrestore(&card->lock, flags);
 814 }
 815
 816 static inline void __start_dac(struct ali_state *state)
 817 {
 818         struct dmabuf *dmabuf = &state->dmabuf;
 819         if (dmabuf->count > 0 && dmabuf->ready && !dmabuf->enable &&
 820             (dmabuf->trigger & PCM_ENABLE_OUTPUT)) {
 821                 dmabuf->enable |= DAC_RUNNING;
 822                 outb((1 << 4) | (1 << 2), state->card->iobase + PO_CR);
 823                 outl((1 << 1), state->card->iobase + 0x08);     //dma control register
 824         }
 825 }
 826
 827 static void start_dac(struct ali_state *state)
 828 {
 829         struct ali_card *card = state->card;
 830         unsigned long flags;
 831         spin_lock_irqsave(&card->lock, flags);
 832         __start_dac(state);
 833         spin_unlock_irqrestore(&card->lock, flags);
 834 }
 835
 836 /* stop codec and controller spdif out  (lock held) */
 837 static inline void __stop_spdifout(struct ali_state *state)
 838 {
 839         struct dmabuf *dmabuf = &state->dmabuf;
 840         struct ali_card *card = state->card;
 841
 842         if (codec_independent_spdif_locked > 0) {
 843                 dmabuf->enable &= ~CODEC_SPDIFOUT_RUNNING;
 844                 outl((1 << 19), card->iobase + 0x08);
 845                 outb(0, card->iobase + CODECSPDIFOUT_CR);
 846
 847                 while (inb(card->iobase + CODECSPDIFOUT_CR) != 0)
 848                         cpu_relax();
 849
 850                 outb(inb(card->iobase + CODECSPDIFOUT_SR) | 0x001e, card->iobase + CODECSPDIFOUT_SR);
 851                 outl(inl(card->iobase + ALI_INTERRUPTSR) & INT_CODECSPDIFOUT, card->iobase + ALI_INTERRUPTSR);
 852         } else {
 853                 if (controller_independent_spdif_locked > 0) {
 854                         dmabuf->enable &= ~CONTROLLER_SPDIFOUT_RUNNING;
 855                         outl((1 << 23), card->iobase + 0x08);
 856                         outb(0, card->iobase + CONTROLLERSPDIFOUT_CR);
 857                         while (inb(card->iobase + CONTROLLERSPDIFOUT_CR) != 0)
 858                                 cpu_relax();
 859                         outb(inb(card->iobase + CONTROLLERSPDIFOUT_SR) | 0x001e, card->iobase + CONTROLLERSPDIFOUT_SR);
 860                         outl(inl(card->iobase + ALI_INTERRUPTSR) & INT_SPDIFOUT, card->iobase + ALI_INTERRUPTSR);
 861                 }
 862         }
 863 }
 864
 865 static void stop_spdifout(struct ali_state *state)
 866 {
 867         struct ali_card *card = state->card;
 868         unsigned long flags;
 869         spin_lock_irqsave(&card->lock, flags);
 870         __stop_spdifout(state);
 871         spin_unlock_irqrestore(&card->lock, flags);
 872 }
 873
 874 static inline void __start_spdifout(struct ali_state *state)
 875 {
 876         struct dmabuf *dmabuf = &state->dmabuf;
 877         if (dmabuf->count > 0 && dmabuf->ready && !dmabuf->enable &&
 878             (dmabuf->trigger & SPDIF_ENABLE_OUTPUT)) {
 879                 if (codec_independent_spdif_locked > 0) {
 880                         dmabuf->enable |= CODEC_SPDIFOUT_RUNNING;
 881                         outb((1 << 4) | (1 << 2), state->card->iobase + CODECSPDIFOUT_CR);
 882                         outl((1 << 3), state->card->iobase + 0x08);     //dma control register
 883                 } else {
 884                         if (controller_independent_spdif_locked > 0) {
 885                                 dmabuf->enable |= CONTROLLER_SPDIFOUT_RUNNING;
 886                                 outb((1 << 4) | (1 << 2), state->card->iobase + CONTROLLERSPDIFOUT_CR);
 887                                 outl((1 << 7), state->card->iobase + 0x08);     //dma control register
 888                         }
 889                 }
 890         }
 891 }
 892
 893 static void start_spdifout(struct ali_state *state)
 894 {
 895         struct ali_card *card = state->card;
 896         unsigned long flags;
 897         spin_lock_irqsave(&card->lock, flags);
 898         __start_spdifout(state);
 899         spin_unlock_irqrestore(&card->lock, flags);
 900 }
 901
 902 #define DMABUF_DEFAULTORDER (16-PAGE_SHIFT)
 903 #define DMABUF_MINORDER 1
 904
 905 /* allocate DMA buffer, playback , recording,spdif out  buffer should be allocated separately */
 906 static int alloc_dmabuf(struct ali_state *state)
 907 {
 908         struct dmabuf *dmabuf = &state->dmabuf;
 909         void *rawbuf = NULL;
 910         int order, size;
 911         struct page *page, *pend;
 912
 913         /* If we don't have any oss frag params, then use our default ones */
 914         if (dmabuf->ossmaxfrags == 0)
 915                 dmabuf->ossmaxfrags = 4;
 916         if (dmabuf->ossfragsize == 0)
 917                 dmabuf->ossfragsize = (PAGE_SIZE << DMABUF_DEFAULTORDER) / dmabuf->ossmaxfrags;
 918         size = dmabuf->ossfragsize * dmabuf->ossmaxfrags;
 919
 920         if (dmabuf->rawbuf && (PAGE_SIZE << dmabuf->buforder) == size)
 921                 return 0;
 922         /* alloc enough to satisfy the oss params */
 923         for (order = DMABUF_DEFAULTORDER; order >= DMABUF_MINORDER; order--) {
 924                 if ((PAGE_SIZE << order) > size)
 925                         continue;
 926                 if ((rawbuf = pci_alloc_consistent(state->card->pci_dev,
 927                                                    PAGE_SIZE << order,
 928                                                    &dmabuf->dma_handle)))
 929                         break;
 930         }
 931         if (!rawbuf)
 932                 return -ENOMEM;
 933
 934         dmabuf->ready = dmabuf->mapped = 0;
 935         dmabuf->rawbuf = rawbuf;
 936         dmabuf->buforder = order;
 937
 938         /* now mark the pages as reserved; otherwise remap_pfn_range doesn't do what we want */
 939         pend = virt_to_page(rawbuf + (PAGE_SIZE << order) - 1);
 940         for (page = virt_to_page(rawbuf); page <= pend; page++)
 941                 SetPageReserved(page);
 942         return 0;
 943 }
 944
 945 /* free DMA buffer */
 946 static void dealloc_dmabuf(struct ali_state *state)
 947 {
 948         struct dmabuf *dmabuf = &state->dmabuf;
 949         struct page *page, *pend;
 950
 951         if (dmabuf->rawbuf) {
 952                 /* undo marking the pages as reserved */
 953                 pend = virt_to_page(dmabuf->rawbuf + (PAGE_SIZE << dmabuf->buforder) - 1);
 954                 for (page = virt_to_page(dmabuf->rawbuf); page <= pend; page++)
 955                         ClearPageReserved(page);
 956                 pci_free_consistent(state->card->pci_dev,
 957                                     PAGE_SIZE << dmabuf->buforder,
 958                                     dmabuf->rawbuf, dmabuf->dma_handle);
 959         }
 960         dmabuf->rawbuf = NULL;
 961         dmabuf->mapped = dmabuf->ready = 0;
 962 }
 963
 964 static int prog_dmabuf(struct ali_state *state, unsigned rec)
 965 {
 966         struct dmabuf *dmabuf = &state->dmabuf;
 967         struct ali_channel *c = NULL;
 968         struct sg_item *sg;
 969         unsigned long flags;
 970         int ret;
 971         unsigned fragint;
 972         int i;
 973
 974         spin_lock_irqsave(&state->card->lock, flags);
 975         if (dmabuf->enable & DAC_RUNNING)
 976                 __stop_dac(state);
 977         if (dmabuf->enable & ADC_RUNNING)
 978                 __stop_adc(state);
 979         if (dmabuf->enable & CODEC_SPDIFOUT_RUNNING)
 980                 __stop_spdifout(state);
 981         if (dmabuf->enable & CONTROLLER_SPDIFOUT_RUNNING)
 982                 __stop_spdifout(state);
 983
 984         dmabuf->total_bytes = 0;
 985         dmabuf->count = dmabuf->error = 0;
 986         dmabuf->swptr = dmabuf->hwptr = 0;
 987         spin_unlock_irqrestore(&state->card->lock, flags);
 988
 989         /* allocate DMA buffer, let alloc_dmabuf determine if we are already
 990          * allocated well enough or if we should replace the current buffer
 991          * (assuming one is already allocated, if it isn't, then allocate it).
 992          */
 993         if ((ret = alloc_dmabuf(state)))
 994                 return ret;
 995
 996         /* FIXME: figure out all this OSS fragment stuff */
 997         /* I did, it now does what it should according to the OSS API.  DL */
 998         /* We may not have realloced our dmabuf, but the fragment size to
 999          * fragment number ratio may have changed, so go ahead and reprogram
1000          * things
1001          */
1002
1003         dmabuf->dmasize = PAGE_SIZE << dmabuf->buforder;
1004         dmabuf->numfrag = SG_LEN;
1005         dmabuf->fragsize = dmabuf->dmasize / dmabuf->numfrag;
1006         dmabuf->fragsamples = dmabuf->fragsize >> 1;
1007         dmabuf->userfragsize = dmabuf->ossfragsize;
1008         dmabuf->userfrags = dmabuf->dmasize / dmabuf->ossfragsize;
1009
1010         memset(dmabuf->rawbuf, 0, dmabuf->dmasize);
1011
1012         if (dmabuf->ossmaxfrags == 4) {
1013                 fragint = 8;
1014                 dmabuf->fragshift = 2;
1015         } else if (dmabuf->ossmaxfrags == 8) {
1016                 fragint = 4;
1017                 dmabuf->fragshift = 3;
1018         } else if (dmabuf->ossmaxfrags == 16) {
1019                 fragint = 2;
1020                 dmabuf->fragshift = 4;
1021         } else {
1022                 fragint = 1;
1023                 dmabuf->fragshift = 5;
1024         }
1025         /*
1026          *      Now set up the ring
1027          */
1028
1029         if (rec == 1)
1030                 c = dmabuf->read_channel;
1031         else if (rec == 2)
1032                 c = dmabuf->codec_spdifout_channel;
1033         else if (rec == 3)
1034                 c = dmabuf->controller_spdifout_channel;
1035         else if (rec == 0)
1036                 c = dmabuf->write_channel;
1037         if (c != NULL) {
1038                 sg = &c->sg[0];
1039                 /*
1040                  *      Load up 32 sg entries and take an interrupt at half
1041                  *      way (we might want more interrupts later..)
1042                  */
1043                 for (i = 0; i < dmabuf->numfrag; i++) {
1044                         sg->busaddr =
1045                             virt_to_bus(dmabuf->rawbuf +
1046                                         dmabuf->fragsize * i);
1047                         // the card will always be doing 16bit stereo
1048                         sg->control = dmabuf->fragsamples;
1049                         sg->control |= CON_BUFPAD;      //I modify
1050                         // set us up to get IOC interrupts as often as needed to
1051                         // satisfy numfrag requirements, no more
1052                         if (((i + 1) % fragint) == 0) {
1053                                 sg->control |= CON_IOC;
1054                         }
1055                         sg++;
1056                 }
1057                 spin_lock_irqsave(&state->card->lock, flags);
1058                 outb(2, state->card->iobase + c->port + OFF_CR);        /* reset DMA machine */
1059                 outl(virt_to_bus(&c->sg[0]), state->card->iobase + c->port + OFF_BDBAR);
1060                 outb(0, state->card->iobase + c->port + OFF_CIV);
1061                 outb(0, state->card->iobase + c->port + OFF_LVI);
1062                 spin_unlock_irqrestore(&state->card->lock, flags);
1063         }
1064         /* set the ready flag for the dma buffer */
1065         dmabuf->ready = 1;
1066         return 0;
1067 }
1068
1069 static void __ali_update_lvi(struct ali_state *state, int rec)
1070 {
1071         struct dmabuf *dmabuf = &state->dmabuf;
1072         int x, port;
1073         port = state->card->iobase;
1074         if (rec == 1)
1075                 port += dmabuf->read_channel->port;
1076         else if (rec == 2)
1077                 port += dmabuf->codec_spdifout_channel->port;
1078         else if (rec == 3)
1079                 port += dmabuf->controller_spdifout_channel->port;
1080         else if (rec == 0)
1081                 port += dmabuf->write_channel->port;
1082         /* if we are currently stopped, then our CIV is actually set to our
1083          * *last* sg segment and we are ready to wrap to the next.  However,
1084          * if we set our LVI to the last sg segment, then it won't wrap to
1085          * the next sg segment, it won't even get a start.  So, instead, when
1086          * we are stopped, we set both the LVI value and also we increment
1087          * the CIV value to the next sg segment to be played so that when
1088          * we call start_{dac,adc}, things will operate properly
1089          */
1090         if (!dmabuf->enable && dmabuf->ready) {
1091                 if (rec && dmabuf->count < dmabuf->dmasize && (dmabuf->trigger & PCM_ENABLE_INPUT)) {
1092                         outb((inb(port + OFF_CIV) + 1) & 31, port + OFF_LVI);
1093                         __start_adc(state);
1094                         while (! (inb(port + OFF_CR) & ((1 << 4) | (1 << 2))))
1095                                 cpu_relax();
1096                 } else if (!rec && dmabuf->count && (dmabuf->trigger & PCM_ENABLE_OUTPUT)) {
1097                         outb((inb(port + OFF_CIV) + 1) & 31, port + OFF_LVI);
1098                         __start_dac(state);
1099                         while (!(inb(port + OFF_CR) & ((1 << 4) | (1 << 2))))
1100                                 cpu_relax();
1101                 } else if (rec && dmabuf->count && (dmabuf->trigger & SPDIF_ENABLE_OUTPUT)) {
1102                         if (codec_independent_spdif_locked > 0) {
1103                                 // outb((inb(port+OFF_CIV))&31, port+OFF_LVI);
1104                                 outb((inb(port + OFF_CIV) + 1) & 31, port + OFF_LVI);
1105                                 __start_spdifout(state);
1106                                 while (!(inb(port + OFF_CR) & ((1 << 4) | (1 << 2))))
1107                                         cpu_relax();
1108                         } else {
1109                                 if (controller_independent_spdif_locked > 0) {
1110                                         outb((inb(port + OFF_CIV) + 1) & 31, port + OFF_LVI);
1111                                         __start_spdifout(state);
1112                                         while (!(inb(port + OFF_CR) & ((1 << 4) | (1 << 2))))
1113                                                 cpu_relax();
1114                                 }
1115                         }
1116                 }
1117         }
1118
1119         /* swptr - 1 is the tail of our transfer */
1120         x = (dmabuf->dmasize + dmabuf->swptr - 1) % dmabuf->dmasize;
1121         x /= dmabuf->fragsize;
1122         outb(x, port + OFF_LVI);
1123 }
1124
1125 static void ali_update_lvi(struct ali_state *state, int rec)
1126 {
1127         struct dmabuf *dmabuf = &state->dmabuf;
1128         unsigned long flags;
1129         if (!dmabuf->ready)
1130                 return;
1131         spin_lock_irqsave(&state->card->lock, flags);
1132         __ali_update_lvi(state, rec);
1133         spin_unlock_irqrestore(&state->card->lock, flags);
1134 }
1135
1136 /* update buffer manangement pointers, especially, dmabuf->count and dmabuf->hwptr */
1137 static void ali_update_ptr(struct ali_state *state)
1138 {
1139         struct dmabuf *dmabuf = &state->dmabuf;
1140         unsigned hwptr;
1141         int diff;
1142
1143         /* error handling and process wake up for DAC */
1144         if (dmabuf->enable == ADC_RUNNING) {
1145                 /* update hardware pointer */
1146                 hwptr = ali_get_dma_addr(state, 1);
1147                 diff = (dmabuf->dmasize + hwptr - dmabuf->hwptr) % dmabuf->dmasize;
1148                 dmabuf->hwptr = hwptr;
1149                 dmabuf->total_bytes += diff;
1150                 dmabuf->count += diff;
1151                 if (dmabuf->count > dmabuf->dmasize) {
1152                         /* buffer underrun or buffer overrun */
1153                         /* this is normal for the end of a read */
1154                         /* only give an error if we went past the */
1155                         /* last valid sg entry */
1156                         if ((inb(state->card->iobase + PI_CIV) & 31) != (inb(state->card->iobase + PI_LVI) & 31)) {
1157                                 printk(KERN_WARNING "ali_audio: DMA overrun on read\n");
1158                                 dmabuf->error++;
1159                         }
1160                 }
1161                 if (dmabuf->count > dmabuf->userfragsize)
1162                         wake_up(&dmabuf->wait);
1163         }
1164         /* error handling and process wake up for DAC */
1165         if (dmabuf->enable == DAC_RUNNING) {
1166                 /* update hardware pointer */
1167                 hwptr = ali_get_dma_addr(state, 0);
1168                 diff =
1169                     (dmabuf->dmasize + hwptr -
1170                      dmabuf->hwptr) % dmabuf->dmasize;
1171 #if defined(DEBUG_INTERRUPTS) || defined(DEBUG_MMAP)
1172                 printk("DAC HWP %d,%d,%d\n", hwptr, dmabuf->hwptr, diff);
1173 #endif
1174                 dmabuf->hwptr = hwptr;
1175                 dmabuf->total_bytes += diff;
1176                 dmabuf->count -= diff;
1177                 if (dmabuf->count < 0) {
1178                         /* buffer underrun or buffer overrun */
1179                         /* this is normal for the end of a write */
1180                         /* only give an error if we went past the */
1181                         /* last valid sg entry */
1182                         if ((inb(state->card->iobase + PO_CIV) & 31) != (inb(state->card->iobase + PO_LVI) & 31)) {
1183                                 printk(KERN_WARNING "ali_audio: DMA overrun on write\n");
1184                                 printk(KERN_DEBUG "ali_audio: CIV %d, LVI %d, hwptr %x, count %d\n",
1185                                                         inb(state->card->iobase + PO_CIV) & 31,
1186                                                         inb(state->card->iobase + PO_LVI) & 31,
1187                                                         dmabuf->hwptr,
1188                                                         dmabuf->count);
1189                                 dmabuf->error++;
1190                         }
1191                 }
1192                 if (dmabuf->count < (dmabuf->dmasize - dmabuf->userfragsize))
1193                         wake_up(&dmabuf->wait);
1194         }
1195
1196         /* error handling and process wake up for CODEC SPDIF OUT */
1197         if (dmabuf->enable == CODEC_SPDIFOUT_RUNNING) {
1198                 /* update hardware pointer */
1199                 hwptr = ali_get_dma_addr(state, 2);
1200                 diff = (dmabuf->dmasize + hwptr - dmabuf->hwptr) % dmabuf->dmasize;
1201                 dmabuf->hwptr = hwptr;
1202                 dmabuf->total_bytes += diff;
1203                 dmabuf->count -= diff;
1204                 if (dmabuf->count < 0) {
1205                         /* buffer underrun or buffer overrun */
1206                         /* this is normal for the end of a write */
1207                         /* only give an error if we went past the */
1208                         /* last valid sg entry */
1209                         if ((inb(state->card->iobase + CODECSPDIFOUT_CIV) & 31) != (inb(state->card->iobase + CODECSPDIFOUT_LVI) & 31)) {
1210                                 printk(KERN_WARNING "ali_audio: DMA overrun on write\n");
1211                                 printk(KERN_DEBUG "ali_audio: CIV %d, LVI %d, hwptr %x, count %d\n",
1212                                         inb(state->card->iobase + CODECSPDIFOUT_CIV) & 31,
1213                                         inb(state->card->iobase + CODECSPDIFOUT_LVI) & 31,
1214                                         dmabuf->hwptr, dmabuf->count);
1215                                 dmabuf->error++;
1216                         }
1217                 }
1218                 if (dmabuf->count < (dmabuf->dmasize - dmabuf->userfragsize))
1219                         wake_up(&dmabuf->wait);
1220         }
1221         /* error handling and process wake up for CONTROLLER SPDIF OUT */
1222         if (dmabuf->enable == CONTROLLER_SPDIFOUT_RUNNING) {
1223                 /* update hardware pointer */
1224                 hwptr = ali_get_dma_addr(state, 3);
1225                 diff = (dmabuf->dmasize + hwptr - dmabuf->hwptr) % dmabuf->dmasize;
1226                 dmabuf->hwptr = hwptr;
1227                 dmabuf->total_bytes += diff;
1228                 dmabuf->count -= diff;
1229                 if (dmabuf->count < 0) {
1230                         /* buffer underrun or buffer overrun */
1231                         /* this is normal for the end of a write */
1232                         /* only give an error if we went past the */
1233                         /* last valid sg entry */
1234                         if ((inb(state->card->iobase + CONTROLLERSPDIFOUT_CIV) & 31) != (inb(state->card->iobase + CONTROLLERSPDIFOUT_LVI) & 31)) {
1235                                 printk(KERN_WARNING
1236                                        "ali_audio: DMA overrun on write\n");
1237                                 printk("ali_audio: CIV %d, LVI %d, hwptr %x, "
1238                                         "count %d\n",
1239                                                 inb(state->card->iobase + CONTROLLERSPDIFOUT_CIV) & 31,
1240                                                 inb(state->card->iobase + CONTROLLERSPDIFOUT_LVI) & 31,
1241                                                 dmabuf->hwptr, dmabuf->count);
1242                                 dmabuf->error++;
1243                         }
1244                 }
1245                 if (dmabuf->count < (dmabuf->dmasize - dmabuf->userfragsize))
1246                         wake_up(&dmabuf->wait);
1247         }
1248 }
1249
1250 static inline int ali_get_free_write_space(struct
1251                                            ali_state
1252                                            *state)
1253 {
1254         struct dmabuf *dmabuf = &state->dmabuf;
1255         int free;
1256
1257         if (dmabuf->count < 0) {
1258                 dmabuf->count = 0;
1259                 dmabuf->swptr = dmabuf->hwptr;
1260         }
1261         free = dmabuf->dmasize - dmabuf->swptr;
1262         if ((dmabuf->count + free) > dmabuf->dmasize){
1263                 free = dmabuf->dmasize - dmabuf->count;
1264         }
1265         return free;
1266 }
1267
1268 static inline int ali_get_available_read_data(struct
1269                                               ali_state
1270                                               *state)
1271 {
1272         struct dmabuf *dmabuf = &state->dmabuf;
1273         int avail;
1274         ali_update_ptr(state);
1275         // catch overruns during record
1276         if (dmabuf->count > dmabuf->dmasize) {
1277                 dmabuf->count = dmabuf->dmasize;
1278                 dmabuf->swptr = dmabuf->hwptr;
1279         }
1280         avail = dmabuf->count;
1281         avail -= (dmabuf->hwptr % dmabuf->fragsize);
1282         if (avail < 0)
1283                 return (0);
1284         return (avail);
1285 }
1286
1287 static int drain_dac(struct ali_state *state, int signals_allowed)
1288 {
1289
1290         DECLARE_WAITQUEUE(wait, current);
1291         struct dmabuf *dmabuf = &state->dmabuf;
1292         unsigned long flags;
1293         unsigned long tmo;
1294         int count;
1295         if (!dmabuf->ready)
1296                 return 0;
1297         if (dmabuf->mapped) {
1298                 stop_dac(state);
1299                 return 0;
1300         }
1301         add_wait_queue(&dmabuf->wait, &wait);
1302         for (;;) {
1303
1304                 spin_lock_irqsave(&state->card->lock, flags);
1305                 ali_update_ptr(state);
1306                 count = dmabuf->count;
1307                 spin_unlock_irqrestore(&state->card->lock, flags);
1308                 if (count <= 0)
1309                         break;
1310                 /*
1311                  * This will make sure that our LVI is correct, that our
1312                  * pointer is updated, and that the DAC is running.  We
1313                  * have to force the setting of dmabuf->trigger to avoid
1314                  * any possible deadlocks.
1315                  */
1316                 if (!dmabuf->enable) {
1317                         dmabuf->trigger = PCM_ENABLE_OUTPUT;
1318                         ali_update_lvi(state, 0);
1319                 }
1320                 if (signal_pending(current) && signals_allowed) {
1321                         break;
1322                 }
1323
1324                 /* It seems that we have to set the current state to
1325                  * TASK_INTERRUPTIBLE every time to make the process
1326                  * really go to sleep.  This also has to be *after* the
1327                  * update_ptr() call because update_ptr is likely to
1328                  * do a wake_up() which will unset this before we ever
1329                  * try to sleep, resuling in a tight loop in this code
1330                  * instead of actually sleeping and waiting for an
1331                  * interrupt to wake us up!
1332                  */
1333                 set_current_state(TASK_INTERRUPTIBLE);
1334                 /*
1335                  * set the timeout to significantly longer than it *should*
1336                  * take for the DAC to drain the DMA buffer
1337                  */
1338                 tmo = (count * HZ) / (dmabuf->rate);
1339                 if (!schedule_timeout(tmo >= 2 ? tmo : 2)) {
1340                         printk(KERN_ERR "ali_audio: drain_dac, dma timeout?\n");
1341                         count = 0;
1342                         break;
1343                 }
1344         }
1345         set_current_state(TASK_RUNNING);
1346         remove_wait_queue(&dmabuf->wait, &wait);
1347         if (count > 0 && signal_pending(current) && signals_allowed)
1348                 return -ERESTARTSYS;
1349         stop_dac(state);
1350         return 0;
1351 }
1352
1353
1354 static int drain_spdifout(struct ali_state *state, int signals_allowed)
1355 {
1356
1357         DECLARE_WAITQUEUE(wait, current);
1358         struct dmabuf *dmabuf = &state->dmabuf;
1359         unsigned long flags;
1360         unsigned long tmo;
1361         int count;
1362         if (!dmabuf->ready)
1363                 return 0;
1364         if (dmabuf->mapped) {
1365                 stop_spdifout(state);
1366                 return 0;
1367         }
1368         add_wait_queue(&dmabuf->wait, &wait);
1369         for (;;) {
1370
1371                 spin_lock_irqsave(&state->card->lock, flags);
1372                 ali_update_ptr(state);
1373                 count = dmabuf->count;
1374                 spin_unlock_irqrestore(&state->card->lock, flags);
1375                 if (count <= 0)
1376                         break;
1377                 /*
1378                  * This will make sure that our LVI is correct, that our
1379                  * pointer is updated, and that the DAC is running.  We
1380                  * have to force the setting of dmabuf->trigger to avoid
1381                  * any possible deadlocks.
1382                  */
1383                 if (!dmabuf->enable) {
1384                         if (codec_independent_spdif_locked > 0) {
1385                                 dmabuf->trigger = SPDIF_ENABLE_OUTPUT;
1386                                 ali_update_lvi(state, 2);
1387                         } else {
1388                                 if (controller_independent_spdif_locked > 0) {
1389                                         dmabuf->trigger = SPDIF_ENABLE_OUTPUT;
1390                                         ali_update_lvi(state, 3);
1391                                 }
1392                         }
1393                 }
1394                 if (signal_pending(current) && signals_allowed) {
1395                         break;
1396                 }
1397
1398                 /* It seems that we have to set the current state to
1399                  * TASK_INTERRUPTIBLE every time to make the process
1400                  * really go to sleep.  This also has to be *after* the
1401                  * update_ptr() call because update_ptr is likely to
1402                  * do a wake_up() which will unset this before we ever
1403                  * try to sleep, resuling in a tight loop in this code
1404                  * instead of actually sleeping and waiting for an
1405                  * interrupt to wake us up!
1406                  */
1407                 set_current_state(TASK_INTERRUPTIBLE);
1408                 /*
1409                  * set the timeout to significantly longer than it *should*
1410                  * take for the DAC to drain the DMA buffer
1411                  */
1412                 tmo = (count * HZ) / (dmabuf->rate);
1413                 if (!schedule_timeout(tmo >= 2 ? tmo : 2)) {
1414                         printk(KERN_ERR "ali_audio: drain_spdifout, dma timeout?\n");
1415                         count = 0;
1416                         break;
1417                 }
1418         }
1419         set_current_state(TASK_RUNNING);
1420         remove_wait_queue(&dmabuf->wait, &wait);
1421         if (count > 0 && signal_pending(current) && signals_allowed)
1422                 return -ERESTARTSYS;
1423         stop_spdifout(state);
1424         return 0;
1425 }
1426
1427 static void ali_channel_interrupt(struct ali_card *card)
1428 {
1429         int i, count;
1430
1431         for (i = 0; i < NR_HW_CH; i++) {
1432                 struct ali_state *state = card->states[i];
1433                 struct ali_channel *c = NULL;
1434                 struct dmabuf *dmabuf;
1435                 unsigned long port = card->iobase;
1436                 u16 status;
1437                 if (!state)
1438                         continue;
1439                 if (!state->dmabuf.ready)
1440                         continue;
1441                 dmabuf = &state->dmabuf;
1442                 if (codec_independent_spdif_locked > 0) {
1443                         if (dmabuf->enable & CODEC_SPDIFOUT_RUNNING) {
1444                                 c = dmabuf->codec_spdifout_channel;
1445                         }
1446                 } else {
1447                         if (controller_independent_spdif_locked > 0) {
1448                                 if (dmabuf->enable & CONTROLLER_SPDIFOUT_RUNNING)
1449                                         c = dmabuf->controller_spdifout_channel;
1450                         } else {
1451                                 if (dmabuf->enable & DAC_RUNNING) {
1452                                         c = dmabuf->write_channel;
1453                                 } else if (dmabuf->enable & ADC_RUNNING) {
1454                                         c = dmabuf->read_channel;
1455                                 } else
1456                                         continue;
1457                         }
1458                 }
1459                 port += c->port;
1460
1461                 status = inw(port + OFF_SR);
1462
1463                 if (status & DMA_INT_COMPLETE) {
1464                         /* only wake_up() waiters if this interrupt signals
1465                          * us being beyond a userfragsize of data open or
1466                          * available, and ali_update_ptr() does that for
1467                          * us
1468                          */
1469                         ali_update_ptr(state);
1470                 }
1471
1472                 if (status & DMA_INT_LVI) {
1473                         ali_update_ptr(state);
1474                         wake_up(&dmabuf->wait);
1475
1476                         if (dmabuf->enable & DAC_RUNNING)
1477                                 count = dmabuf->count;
1478                         else if (dmabuf->enable & ADC_RUNNING)
1479                                 count = dmabuf->dmasize - dmabuf->count;
1480                         else if (dmabuf->enable & CODEC_SPDIFOUT_RUNNING)
1481                                 count = dmabuf->count;
1482                         else if (dmabuf->enable & CONTROLLER_SPDIFOUT_RUNNING)
1483                                 count = dmabuf->count;
1484                         else count = 0;
1485
1486                         if (count > 0) {
1487                                 if (dmabuf->enable & DAC_RUNNING)
1488                                         outl((1 << 1), state->card->iobase + ALI_DMACR);
1489                                 else if (dmabuf->enable & CODEC_SPDIFOUT_RUNNING)
1490                                                 outl((1 << 3), state->card->iobase + ALI_DMACR);
1491                                 else if (dmabuf->enable & CONTROLLER_SPDIFOUT_RUNNING)
1492                                         outl((1 << 7), state->card->iobase + ALI_DMACR);
1493                         } else {
1494                                 if (dmabuf->enable & DAC_RUNNING)
1495                                         __stop_dac(state);
1496                                 if (dmabuf->enable & ADC_RUNNING)
1497                                         __stop_adc(state);
1498                                 if (dmabuf->enable & CODEC_SPDIFOUT_RUNNING)
1499                                         __stop_spdifout(state);
1500                                 if (dmabuf->enable & CONTROLLER_SPDIFOUT_RUNNING)
1501                                         __stop_spdifout(state);
1502                                 dmabuf->enable = 0;
1503                                 wake_up(&dmabuf->wait);
1504                         }
1505
1506                 }
1507                 if (!(status & DMA_INT_DCH)) {
1508                         ali_update_ptr(state);
1509                         wake_up(&dmabuf->wait);
1510                         if (dmabuf->enable & DAC_RUNNING)
1511                                 count = dmabuf->count;
1512                         else if (dmabuf->enable & ADC_RUNNING)
1513                                 count = dmabuf->dmasize - dmabuf->count;
1514                         else if (dmabuf->enable & CODEC_SPDIFOUT_RUNNING)
1515                                 count = dmabuf->count;
1516                         else if (dmabuf->enable & CONTROLLER_SPDIFOUT_RUNNING)
1517                                 count = dmabuf->count;
1518                         else
1519                                 count = 0;
1520
1521                         if (count > 0) {
1522                                 if (dmabuf->enable & DAC_RUNNING)
1523                                         outl((1 << 1), state->card->iobase + ALI_DMACR);
1524                                 else if (dmabuf->enable & CODEC_SPDIFOUT_RUNNING)
1525                                         outl((1 << 3), state->card->iobase + ALI_DMACR);
1526                                 else if (dmabuf->enable & CONTROLLER_SPDIFOUT_RUNNING)
1527                                         outl((1 << 7), state->card->iobase + ALI_DMACR);
1528                         } else {
1529                                 if (dmabuf->enable & DAC_RUNNING)
1530                                         __stop_dac(state);
1531                                 if (dmabuf->enable & ADC_RUNNING)
1532                                         __stop_adc(state);
1533                                 if (dmabuf->enable & CODEC_SPDIFOUT_RUNNING)
1534                                         __stop_spdifout(state);
1535                                 if (dmabuf->enable & CONTROLLER_SPDIFOUT_RUNNING)
1536                                         __stop_spdifout(state);
1537                                 dmabuf->enable = 0;
1538                                 wake_up(&dmabuf->wait);
1539                         }
1540                 }
1541                 outw(status & DMA_INT_MASK, port + OFF_SR);
1542         }
1543 }
1544
1545 static irqreturn_t ali_interrupt(int irq, void *dev_id, struct pt_regs *regs)
1546 {
1547         struct ali_card *card = (struct ali_card *) dev_id;
1548         u32 status;
1549         u16 status2;
1550
1551         spin_lock(&card->lock);
1552         status = inl(card->iobase + ALI_INTERRUPTSR);
1553         if (!(status & INT_MASK)) {
1554                 spin_unlock(&card->lock);
1555                 return IRQ_NONE;                /* not for us */
1556         }
1557
1558         if (codec_independent_spdif_locked > 0) {
1559                 if (globel == 0) {
1560                         globel += 1;
1561                         status2 = inw(card->iobase + 0x76);
1562                         outw(status2 | 0x000c, card->iobase + 0x76);
1563                 } else {
1564                         if (status & (INT_PCMOUT | INT_PCMIN | INT_MICIN | INT_SPDIFOUT | INT_CODECSPDIFOUT))
1565                                 ali_channel_interrupt(card);
1566                 }
1567         } else {
1568                 if (status & (INT_PCMOUT | INT_PCMIN | INT_MICIN | INT_SPDIFOUT | INT_CODECSPDIFOUT))
1569                         ali_channel_interrupt(card);
1570         }
1571
1572         /* clear 'em */
1573         outl(status & INT_MASK, card->iobase + ALI_INTERRUPTSR);
1574         spin_unlock(&card->lock);
1575         return IRQ_HANDLED;
1576 }
1577
1578 /* in this loop, dmabuf.count signifies the amount of data that is
1579    waiting to be copied to the user's buffer.  It is filled by the dma
1580    machine and drained by this loop. */
1581
1582 static ssize_t ali_read(struct file *file, char __user *buffer,
1583                         size_t count, loff_t * ppos)
1584 {
1585         struct ali_state *state = (struct ali_state *) file->private_data;
1586         struct ali_card *card = state ? state->card : NULL;
1587         struct dmabuf *dmabuf = &state->dmabuf;
1588         ssize_t ret;
1589         unsigned long flags;
1590         unsigned int swptr;
1591         int cnt;
1592         DECLARE_WAITQUEUE(waita, current);
1593 #ifdef DEBUG2
1594         printk("ali_audio: ali_read called, count = %d\n", count);
1595 #endif
1596         if (dmabuf->mapped)
1597                 return -ENXIO;
1598         if (dmabuf->enable & DAC_RUNNING)
1599                 return -ENODEV;
1600         if (!dmabuf->read_channel) {
1601                 dmabuf->ready = 0;
1602                 dmabuf->read_channel = card->alloc_rec_pcm_channel(card);
1603                 if (!dmabuf->read_channel) {
1604                         return -EBUSY;
1605                 }
1606         }
1607         if (!dmabuf->ready && (ret = prog_dmabuf(state, 1)))
1608                 return ret;
1609         if (!access_ok(VERIFY_WRITE, buffer, count))
1610                 return -EFAULT;
1611         ret = 0;
1612         add_wait_queue(&dmabuf->wait, &waita);
1613         while (count > 0) {
1614                 set_current_state(TASK_INTERRUPTIBLE);
1615                 spin_lock_irqsave(&card->lock, flags);
1616                 if (PM_SUSPENDED(card)) {
1617                         spin_unlock_irqrestore(&card->lock, flags);
1618                         schedule();
1619                         if (signal_pending(current)) {
1620                                 if (!ret)
1621                                         ret = -EAGAIN;
1622                                 break;
1623                         }
1624                         continue;
1625                 }
1626                 swptr = dmabuf->swptr;
1627                 cnt = ali_get_available_read_data(state);
1628                 // this is to make the copy_to_user simpler below
1629                 if (cnt > (dmabuf->dmasize - swptr))
1630                         cnt = dmabuf->dmasize - swptr;
1631                 spin_unlock_irqrestore(&card->lock, flags);
1632                 if (cnt > count)
1633                         cnt = count;
1634                 /* Lop off the last two bits to force the code to always
1635                  * write in full samples.  This keeps software that sets
1636                  * O_NONBLOCK but doesn't check the return value of the
1637                  * write call from getting things out of state where they
1638                  * think a full 4 byte sample was written when really only
1639                  * a portion was, resulting in odd sound and stereo
1640                  * hysteresis.
1641                  */
1642                 cnt &= ~0x3;
1643                 if (cnt <= 0) {
1644                         unsigned long tmo;
1645                         /*
1646                          * Don't let us deadlock.  The ADC won't start if
1647                          * dmabuf->trigger isn't set.  A call to SETTRIGGER
1648                          * could have turned it off after we set it to on
1649                          * previously.
1650                          */
1651                         dmabuf->trigger = PCM_ENABLE_INPUT;
1652                         /*
1653                          * This does three things.  Updates LVI to be correct,
1654                          * makes sure the ADC is running, and updates the
1655                          * hwptr.
1656                          */
1657                         ali_update_lvi(state, 1);
1658                         if (file->f_flags & O_NONBLOCK) {
1659                                 if (!ret)
1660                                         ret = -EAGAIN;
1661                                 goto done;
1662                         }
1663                         /* Set the timeout to how long it would take to fill
1664                          * two of our buffers.  If we haven't been woke up
1665                          * by then, then we know something is wrong.
1666                          */
1667                         tmo = (dmabuf->dmasize * HZ * 2) / (dmabuf->rate * 4);
1668
1669                         /* There are two situations when sleep_on_timeout returns, one is when
1670                            the interrupt is serviced correctly and the process is waked up by
1671                            ISR ON TIME. Another is when timeout is expired, which means that
1672                            either interrupt is NOT serviced correctly (pending interrupt) or it
1673                            is TOO LATE for the process to be scheduled to run (scheduler latency)
1674                            which results in a (potential) buffer overrun. And worse, there is
1675                            NOTHING we can do to prevent it. */
1676                         if (!schedule_timeout(tmo >= 2 ? tmo : 2)) {
1677                                 printk(KERN_ERR
1678                                        "ali_audio: recording schedule timeout, "
1679                                        "dmasz %u fragsz %u count %i hwptr %u swptr %u\n",
1680                                        dmabuf->dmasize, dmabuf->fragsize,
1681                                        dmabuf->count, dmabuf->hwptr,
1682                                        dmabuf->swptr);
1683                                 /* a buffer overrun, we delay the recovery until next time the
1684                                    while loop begin and we REALLY have space to record */
1685                         }
1686                         if (signal_pending(current)) {
1687                                 ret = ret ? ret : -ERESTARTSYS;
1688                                 goto done;
1689                         }
1690                         continue;
1691                 }
1692
1693                 if (copy_to_user(buffer, dmabuf->rawbuf + swptr, cnt)) {
1694                         if (!ret)
1695                                 ret = -EFAULT;
1696                         goto done;
1697                 }
1698
1699                 swptr = (swptr + cnt) % dmabuf->dmasize;
1700                 spin_lock_irqsave(&card->lock, flags);
1701                 if (PM_SUSPENDED(card)) {
1702                         spin_unlock_irqrestore(&card->lock, flags);
1703                         continue;
1704                 }
1705                 dmabuf->swptr = swptr;
1706                 dmabuf->count -= cnt;
1707                 spin_unlock_irqrestore(&card->lock, flags);
1708                 count -= cnt;
1709                 buffer += cnt;
1710                 ret += cnt;
1711         }
1712 done:
1713         ali_update_lvi(state, 1);
1714         set_current_state(TASK_RUNNING);
1715         remove_wait_queue(&dmabuf->wait, &waita);
1716         return ret;
1717 }
1718
1719 /* in this loop, dmabuf.count signifies the amount of data that is waiting to be dma to
1720    the soundcard.  it is drained by the dma machine and filled by this loop. */
1721 static ssize_t ali_write(struct file *file,
1722                          const char __user *buffer, size_t count, loff_t * ppos)
1723 {
1724         struct ali_state *state = (struct ali_state *) file->private_data;
1725         struct ali_card *card = state ? state->card : NULL;
1726         struct dmabuf *dmabuf = &state->dmabuf;
1727         ssize_t ret;
1728         unsigned long flags;
1729         unsigned int swptr = 0;
1730         int cnt, x;
1731         DECLARE_WAITQUEUE(waita, current);
1732 #ifdef DEBUG2
1733         printk("ali_audio: ali_write called, count = %d\n", count);
1734 #endif
1735         if (dmabuf->mapped)
1736                 return -ENXIO;
1737         if (dmabuf->enable & ADC_RUNNING)
1738                 return -ENODEV;
1739         if (codec_independent_spdif_locked > 0) {
1740                 if (!dmabuf->codec_spdifout_channel) {
1741                         dmabuf->ready = 0;
1742                         dmabuf->codec_spdifout_channel = card->alloc_codec_spdifout_channel(card);
1743                         if (!dmabuf->codec_spdifout_channel)
1744                                 return -EBUSY;
1745                 }
1746         } else {
1747                 if (controller_independent_spdif_locked > 0) {
1748                         if (!dmabuf->controller_spdifout_channel) {
1749                                 dmabuf->ready = 0;
1750                                 dmabuf->controller_spdifout_channel = card->alloc_controller_spdifout_channel(card);
1751                                 if (!dmabuf->controller_spdifout_channel)
1752                                         return -EBUSY;
1753                         }
1754                 } else {
1755                         if (!dmabuf->write_channel) {
1756                                 dmabuf->ready = 0;
1757                                 dmabuf->write_channel =
1758                                     card->alloc_pcm_channel(card);
1759                                 if (!dmabuf->write_channel)
1760                                         return -EBUSY;
1761                         }
1762                 }
1763         }
1764
1765         if (codec_independent_spdif_locked > 0) {
1766                 if (!dmabuf->ready && (ret = prog_dmabuf(state, 2)))
1767                         return ret;
1768         } else {
1769                 if (controller_independent_spdif_locked > 0) {
1770                         if (!dmabuf->ready && (ret = prog_dmabuf(state, 3)))
1771                                 return ret;
1772                 } else {
1773
1774                         if (!dmabuf->ready && (ret = prog_dmabuf(state, 0)))
1775                                 return ret;
1776                 }
1777         }
1778         if (!access_ok(VERIFY_READ, buffer, count))
1779                 return -EFAULT;
1780         ret = 0;
1781         add_wait_queue(&dmabuf->wait, &waita);
1782         while (count > 0) {
1783                 set_current_state(TASK_INTERRUPTIBLE);
1784                 spin_lock_irqsave(&state->card->lock, flags);
1785                 if (PM_SUSPENDED(card)) {
1786                         spin_unlock_irqrestore(&card->lock, flags);
1787                         schedule();
1788                         if (signal_pending(current)) {
1789                                 if (!ret)
1790                                         ret = -EAGAIN;
1791                                 break;
1792                         }
1793                         continue;
1794                 }
1795
1796                 swptr = dmabuf->swptr;
1797                 cnt = ali_get_free_write_space(state);
1798                 /* Bound the maximum size to how much we can copy to the
1799                  * dma buffer before we hit the end.  If we have more to
1800                  * copy then it will get done in a second pass of this
1801                  * loop starting from the beginning of the buffer.
1802                  */
1803                 if (cnt > (dmabuf->dmasize - swptr))
1804                         cnt = dmabuf->dmasize - swptr;
1805                 spin_unlock_irqrestore(&state->card->lock, flags);
1806 #ifdef DEBUG2
1807                 printk(KERN_INFO
1808                        "ali_audio: ali_write: %d bytes available space\n",
1809                        cnt);
1810 #endif
1811                 if (cnt > count)
1812                         cnt = count;
1813                 /* Lop off the last two bits to force the code to always
1814                  * write in full samples.  This keeps software that sets
1815                  * O_NONBLOCK but doesn't check the return value of the
1816                  * write call from getting things out of state where they
1817                  * think a full 4 byte sample was written when really only
1818                  * a portion was, resulting in odd sound and stereo
1819                  * hysteresis.
1820                  */
1821                 cnt &= ~0x3;
1822                 if (cnt <= 0) {
1823                         unsigned long tmo;
1824                         // There is data waiting to be played
1825                         /*
1826                          * Force the trigger setting since we would
1827                          * deadlock with it set any other way
1828                          */
1829                         if (codec_independent_spdif_locked > 0) {
1830                                 dmabuf->trigger = SPDIF_ENABLE_OUTPUT;
1831                                 ali_update_lvi(state, 2);
1832                         } else {
1833                                 if (controller_independent_spdif_locked > 0) {
1834                                         dmabuf->trigger = SPDIF_ENABLE_OUTPUT;
1835                                         ali_update_lvi(state, 3);
1836                                 } else {
1837
1838                                         dmabuf->trigger = PCM_ENABLE_OUTPUT;
1839                                         ali_update_lvi(state, 0);
1840                                 }
1841                         }
1842                         if (file->f_flags & O_NONBLOCK) {
1843                                 if (!ret)
1844                                         ret = -EAGAIN;
1845                                 goto ret;
1846                         }
1847                         /* Not strictly correct but works */
1848                         tmo = (dmabuf->dmasize * HZ * 2) / (dmabuf->rate * 4);
1849                         /* There are two situations when sleep_on_timeout returns, one is when
1850                            the interrupt is serviced correctly and the process is waked up by
1851                            ISR ON TIME. Another is when timeout is expired, which means that
1852                            either interrupt is NOT serviced correctly (pending interrupt) or it
1853                            is TOO LATE for the process to be scheduled to run (scheduler latency)
1854                            which results in a (potential) buffer underrun. And worse, there is
1855                            NOTHING we can do to prevent it. */
1856
1857                         /* FIXME - do timeout handling here !! */
1858                         schedule_timeout(tmo >= 2 ? tmo : 2);
1859
1860                         if (signal_pending(current)) {
1861                                 if (!ret)
1862                                         ret = -ERESTARTSYS;
1863                                 goto ret;
1864                         }
1865                         continue;
1866                 }
1867                 if (copy_from_user(dmabuf->rawbuf + swptr, buffer, cnt)) {
1868                         if (!ret)
1869                                 ret = -EFAULT;
1870                         goto ret;
1871                 }
1872
1873                 swptr = (swptr + cnt) % dmabuf->dmasize;
1874                 spin_lock_irqsave(&state->card->lock, flags);
1875                 if (PM_SUSPENDED(card)) {
1876                         spin_unlock_irqrestore(&card->lock, flags);
1877                         continue;
1878                 }
1879
1880                 dmabuf->swptr = swptr;
1881                 dmabuf->count += cnt;
1882                 count -= cnt;
1883                 buffer += cnt;
1884                 ret += cnt;
1885                 spin_unlock_irqrestore(&state->card->lock, flags);
1886         }
1887         if (swptr % dmabuf->fragsize) {
1888                 x = dmabuf->fragsize - (swptr % dmabuf->fragsize);
1889                 memset(dmabuf->rawbuf + swptr, '\0', x);
1890         }
1891 ret:
1892         if (codec_independent_spdif_locked > 0) {
1893                 ali_update_lvi(state, 2);
1894         } else {
1895                 if (controller_independent_spdif_locked > 0) {
1896                         ali_update_lvi(state, 3);
1897                 } else {
1898                         ali_update_lvi(state, 0);
1899                 }
1900         }
1901         set_current_state(TASK_RUNNING);
1902         remove_wait_queue(&dmabuf->wait, &waita);
1903         return ret;
1904 }
1905
1906 /* No kernel lock - we have our own spinlock */
1907 static unsigned int ali_poll(struct file *file, struct poll_table_struct
1908                              *wait)
1909 {
1910         struct ali_state *state = (struct ali_state *) file->private_data;
1911         struct dmabuf *dmabuf = &state->dmabuf;
1912         unsigned long flags;
1913         unsigned int mask = 0;
1914         if (!dmabuf->ready)
1915                 return 0;
1916         poll_wait(file, &dmabuf->wait, wait);
1917         spin_lock_irqsave(&state->card->lock, flags);
1918         ali_update_ptr(state);
1919         if (file->f_mode & FMODE_READ && dmabuf->enable & ADC_RUNNING) {
1920                 if (dmabuf->count >= (signed) dmabuf->fragsize)
1921                         mask |= POLLIN | POLLRDNORM;
1922         }
1923         if (file->f_mode & FMODE_WRITE  && (dmabuf->enable & (DAC_RUNNING|CODEC_SPDIFOUT_RUNNING|CONTROLLER_SPDIFOUT_RUNNING))) {
1924                 if ((signed) dmabuf->dmasize >= dmabuf->count + (signed) dmabuf->fragsize)
1925                         mask |= POLLOUT | POLLWRNORM;
1926         }
1927         spin_unlock_irqrestore(&state->card->lock, flags);
1928         return mask;
1929 }
1930
1931 static int ali_mmap(struct file *file, struct vm_area_struct *vma)
1932 {
1933         struct ali_state *state = (struct ali_state *) file->private_data;
1934         struct dmabuf *dmabuf = &state->dmabuf;
1935         int ret = -EINVAL;
1936         unsigned long size;
1937         lock_kernel();
1938         if (vma->vm_flags & VM_WRITE) {
1939                 if (!dmabuf->write_channel && (dmabuf->write_channel = state->card->alloc_pcm_channel(state->card)) == NULL) {
1940                         ret = -EBUSY;
1941                         goto out;
1942                 }
1943         }
1944         if (vma->vm_flags & VM_READ) {
1945                 if (!dmabuf->read_channel && (dmabuf->read_channel = state->card->alloc_rec_pcm_channel(state->card)) == NULL) {
1946                         ret = -EBUSY;
1947                         goto out;
1948                 }
1949         }
1950         if ((ret = prog_dmabuf(state, 0)) != 0)
1951                 goto out;
1952         ret = -EINVAL;
1953         if (vma->vm_pgoff != 0)
1954                 goto out;
1955         size = vma->vm_end - vma->vm_start;
1956         if (size > (PAGE_SIZE << dmabuf->buforder))
1957                 goto out;
1958         ret = -EAGAIN;
1959         if (remap_pfn_range(vma, vma->vm_start,
1960                                 virt_to_phys(dmabuf->rawbuf) >> PAGE_SHIFT,
1961                                 size, vma->vm_page_prot))
1962                 goto out;
1963         dmabuf->mapped = 1;
1964         dmabuf->trigger = 0;
1965         ret = 0;
1966 out:
1967         unlock_kernel();
1968         return ret;
1969 }
1970
1971 static int ali_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
1972 {
1973         struct ali_state *state = (struct ali_state *) file->private_data;
1974         struct ali_channel *c = NULL;
1975         struct dmabuf *dmabuf = &state->dmabuf;
1976         unsigned long flags;
1977         audio_buf_info abinfo;
1978         count_info cinfo;
1979         unsigned int i_scr;
1980         int val = 0, ret;
1981         struct ac97_codec *codec = state->card->ac97_codec[0];
1982         void __user *argp = (void __user *)arg;
1983         int __user *p = argp;
1984
1985 #ifdef DEBUG
1986         printk("ali_audio: ali_ioctl, arg=0x%x, cmd=",
1987                arg ? *p : 0);
1988 #endif
1989         switch (cmd) {
1990         case OSS_GETVERSION:
1991 #ifdef DEBUG
1992                 printk("OSS_GETVERSION\n");
1993 #endif
1994                 return put_user(SOUND_VERSION, p);
1995         case SNDCTL_DSP_RESET:
1996 #ifdef DEBUG
1997                 printk("SNDCTL_DSP_RESET\n");
1998 #endif
1999                 spin_lock_irqsave(&state->card->lock, flags);
2000                 if (dmabuf->enable == DAC_RUNNING) {
2001                         c = dmabuf->write_channel;
2002                         __stop_dac(state);
2003                 }
2004                 if (dmabuf->enable == ADC_RUNNING) {
2005                         c = dmabuf->read_channel;
2006                         __stop_adc(state);
2007                 }
2008                 if (dmabuf->enable == CODEC_SPDIFOUT_RUNNING) {
2009                         c = dmabuf->codec_spdifout_channel;
2010                         __stop_spdifout(state);
2011                 }
2012                 if (dmabuf->enable == CONTROLLER_SPDIFOUT_RUNNING) {
2013                         c = dmabuf->controller_spdifout_channel;
2014                         __stop_spdifout(state);
2015                 }
2016                 if (c != NULL) {
2017                         outb(2, state->card->iobase + c->port + OFF_CR);        /* reset DMA machine */
2018                         outl(virt_to_bus(&c->sg[0]),
2019                              state->card->iobase + c->port + OFF_BDBAR);
2020                         outb(0, state->card->iobase + c->port + OFF_CIV);
2021                         outb(0, state->card->iobase + c->port + OFF_LVI);
2022                 }
2023
2024                 spin_unlock_irqrestore(&state->card->lock, flags);
2025                 synchronize_irq(state->card->pci_dev->irq);
2026                 dmabuf->ready = 0;
2027                 dmabuf->swptr = dmabuf->hwptr = 0;
2028                 dmabuf->count = dmabuf->total_bytes = 0;
2029                 return 0;
2030         case SNDCTL_DSP_SYNC:
2031 #ifdef DEBUG
2032                 printk("SNDCTL_DSP_SYNC\n");
2033 #endif
2034                 if (codec_independent_spdif_locked > 0) {
2035                         if (dmabuf->enable != CODEC_SPDIFOUT_RUNNING
2036                             || file->f_flags & O_NONBLOCK)
2037                                 return 0;
2038                         if ((val = drain_spdifout(state, 1)))
2039                                 return val;
2040                 } else {
2041                         if (controller_independent_spdif_locked > 0) {
2042                                 if (dmabuf->enable !=
2043                                     CONTROLLER_SPDIFOUT_RUNNING
2044                                     || file->f_flags & O_NONBLOCK)
2045                                         return 0;
2046                                 if ((val = drain_spdifout(state, 1)))
2047                                         return val;
2048                         } else {
2049                                 if (dmabuf->enable != DAC_RUNNING
2050                                     || file->f_flags & O_NONBLOCK)
2051                                         return 0;
2052                                 if ((val = drain_dac(state, 1)))
2053                                         return val;
2054                         }
2055                 }
2056                 dmabuf->total_bytes = 0;
2057                 return 0;
2058         case SNDCTL_DSP_SPEED:  /* set smaple rate */
2059 #ifdef DEBUG
2060                 printk("SNDCTL_DSP_SPEED\n");
2061 #endif
2062                 if (get_user(val, p))
2063                         return -EFAULT;
2064                 if (val >= 0) {
2065                         if (file->f_mode & FMODE_WRITE) {
2066                                 if ((state->card->ac97_status & SPDIF_ON)) {    /* S/PDIF Enabled */
2067                                         /* RELTEK ALC650 only support 48000, need to check that */
2068                                         if (ali_valid_spdif_rate(codec, val)) {
2069                                                 if (codec_independent_spdif_locked > 0) {
2070                                                         ali_set_spdif_output(state, -1, 0);
2071                                                         stop_spdifout(state);
2072                                                         dmabuf->ready = 0;
2073                                                         /* I add test codec independent spdif out */
2074                                                         spin_lock_irqsave(&state->card->lock, flags);
2075                                                         ali_set_codecspdifout_rate(state, val); // I modified
2076                                                         spin_unlock_irqrestore(&state->card->lock, flags);
2077                                                         /* Set S/PDIF transmitter rate. */
2078                                                         i_scr = inl(state->card->iobase + ALI_SCR);
2079                                                         if ((i_scr & 0x00300000) == 0x00100000) {
2080                                                                 ali_set_spdif_output(state, AC97_EA_SPSA_7_8, codec_independent_spdif_locked);
2081                                                         } else {
2082                                                                 if ((i_scr&0x00300000)  == 0x00200000)
2083                                                                 {
2084                                                                         ali_set_spdif_output(state, AC97_EA_SPSA_6_9, codec_independent_spdif_locked);
2085                                                                 } else {
2086                                                                         if ((i_scr & 0x00300000) == 0x00300000) {
2087                                                                                 ali_set_spdif_output(state, AC97_EA_SPSA_10_11, codec_independent_spdif_locked);
2088                                                                         } else {
2089                                                                                 ali_set_spdif_output(state, AC97_EA_SPSA_7_8, codec_independent_spdif_locked);
2090                                                                         }
2091                                                                 }
2092                                                         }
2093
2094                                                         if (!(state->card->ac97_status & SPDIF_ON)) {
2095                                                                 val = dmabuf->rate;
2096                                                         }
2097                                                 } else {
2098                                                         if (controller_independent_spdif_locked > 0)
2099                                                         {
2100                                                                 stop_spdifout(state);
2101                                                                 dmabuf->ready = 0;
2102                                                                 spin_lock_irqsave(&state->card->lock, flags);
2103                                                                 ali_set_spdifout_rate(state, controller_independent_spdif_locked);
2104                                                                 spin_unlock_irqrestore(&state->card->lock, flags);
2105                                                         } else {
2106                                                                 /* Set DAC rate */
2107                                                                 ali_set_spdif_output(state, -1, 0);
2108                                                                 stop_dac(state);
2109                                                                 dmabuf->ready = 0;
2110                                                                 spin_lock_irqsave(&state->card->lock, flags);
2111                                                                 ali_set_dac_rate(state, val);
2112                                                                 spin_unlock_irqrestore(&state->card->lock, flags);
2113                                                                 /* Set S/PDIF transmitter rate. */
2114                                                                 ali_set_spdif_output(state, AC97_EA_SPSA_3_4, val);
2115                                                                 if (!(state->card->ac97_status & SPDIF_ON))
2116                                                                 {
2117                                                                         val = dmabuf->rate;
2118                                                                 }
2119                                                         }
2120                                                 }
2121                                         } else {        /* Not a valid rate for S/PDIF, ignore it */
2122                                                 val = dmabuf->rate;
2123                                         }
2124                                 } else {
2125                                         stop_dac(state);
2126                                         dmabuf->ready = 0;
2127                                         spin_lock_irqsave(&state->card->lock, flags);
2128                                         ali_set_dac_rate(state, val);
2129                                         spin_unlock_irqrestore(&state->card->lock, flags);
2130                                 }
2131                         }
2132                         if (file->f_mode & FMODE_READ) {
2133                                 stop_adc(state);
2134                                 dmabuf->ready = 0;
2135                                 spin_lock_irqsave(&state->card->lock, flags);
2136                                 ali_set_adc_rate(state, val);
2137                                 spin_unlock_irqrestore(&state->card->lock, flags);
2138                         }
2139                 }
2140                 return put_user(dmabuf->rate, p);
2141         case SNDCTL_DSP_STEREO: /* set stereo or mono channel */
2142 #ifdef DEBUG
2143                 printk("SNDCTL_DSP_STEREO\n");
2144 #endif
2145                 if (dmabuf->enable & DAC_RUNNING) {
2146                         stop_dac(state);
2147                 }
2148                 if (dmabuf->enable & ADC_RUNNING) {
2149                         stop_adc(state);
2150                 }
2151                 if (dmabuf->enable & CODEC_SPDIFOUT_RUNNING) {
2152                         stop_spdifout(state);
2153                 }
2154                 if (dmabuf->enable & CONTROLLER_SPDIFOUT_RUNNING) {
2155                         stop_spdifout(state);
2156                 }
2157                 return put_user(1, p);
2158         case SNDCTL_DSP_GETBLKSIZE:
2159                 if (file->f_mode & FMODE_WRITE) {
2160                         if (codec_independent_spdif_locked > 0) {
2161                                 if (!dmabuf->ready && (val = prog_dmabuf(state, 2)))
2162                                         return val;
2163                         } else {
2164                                 if (controller_independent_spdif_locked > 0) {
2165                                         if (!dmabuf->ready && (val = prog_dmabuf(state, 3)))
2166                                                 return val;
2167                                 } else {
2168                                         if (!dmabuf->ready && (val = prog_dmabuf(state, 0)))
2169                                                 return val;
2170                                 }
2171                         }
2172                 }
2173
2174                 if (file->f_mode & FMODE_READ) {
2175                         if (!dmabuf->ready && (val = prog_dmabuf(state, 1)))
2176                                 return val;
2177                 }
2178 #ifdef DEBUG
2179                 printk("SNDCTL_DSP_GETBLKSIZE %d\n", dmabuf->userfragsize);
2180 #endif
2181                 return put_user(dmabuf->userfragsize, p);
2182         case SNDCTL_DSP_GETFMTS:        /* Returns a mask of supported sample format */
2183 #ifdef DEBUG
2184                 printk("SNDCTL_DSP_GETFMTS\n");
2185 #endif
2186                 return put_user(AFMT_S16_LE, p);
2187         case SNDCTL_DSP_SETFMT: /* Select sample format */
2188 #ifdef DEBUG
2189                 printk("SNDCTL_DSP_SETFMT\n");
2190 #endif
2191                 return put_user(AFMT_S16_LE, p);
2192         case SNDCTL_DSP_CHANNELS:       // add support 4,6 channel
2193 #ifdef DEBUG
2194                 printk("SNDCTL_DSP_CHANNELS\n");
2195 #endif
2196                 if (get_user(val, p))
2197                         return -EFAULT;
2198                 if (val > 0) {
2199                         if (dmabuf->enable & DAC_RUNNING) {
2200                                 stop_dac(state);
2201                         }
2202                         if (dmabuf->enable & CODEC_SPDIFOUT_RUNNING) {
2203                                 stop_spdifout(state);
2204                         }
2205                         if (dmabuf->enable & CONTROLLER_SPDIFOUT_RUNNING) {
2206                                 stop_spdifout(state);
2207                         }
2208                         if (dmabuf->enable & ADC_RUNNING) {
2209                                 stop_adc(state);
2210                         }
2211                 } else {
2212                         return put_user(state->card->channels, p);
2213                 }
2214
2215                 i_scr = inl(state->card->iobase + ALI_SCR);
2216                 /* Current # of channels enabled */
2217                 if (i_scr & 0x00000100)
2218                         ret = 4;
2219                 else if (i_scr & 0x00000200)
2220                         ret = 6;
2221                 else
2222                         ret = 2;
2223                 switch (val) {
2224                 case 2: /* 2 channels is always supported */
2225                         if (codec_independent_spdif_locked > 0) {
2226                                 outl(((i_scr & 0xfffffcff) | 0x00100000), (state->card->iobase + ALI_SCR));
2227                         } else
2228                                 outl((i_scr & 0xfffffcff), (state->card->iobase + ALI_SCR));
2229                         /* Do we need to change mixer settings????  */
2230                         break;
2231                 case 4: /* Supported on some chipsets, better check first */
2232                         if (codec_independent_spdif_locked > 0) {
2233                                 outl(((i_scr & 0xfffffcff) | 0x00000100 | 0x00200000), (state->card->iobase + ALI_SCR));
2234                         } else
2235                                 outl(((i_scr & 0xfffffcff) | 0x00000100), (state->card->iobase + ALI_SCR));
2236                         break;
2237                 case 6: /* Supported on some chipsets, better check first */
2238                         if (codec_independent_spdif_locked > 0) {
2239                                 outl(((i_scr & 0xfffffcff) | 0x00000200 | 0x00008000 | 0x00300000), (state->card->iobase + ALI_SCR));
2240                         } else
2241                                 outl(((i_scr & 0xfffffcff) | 0x00000200 | 0x00008000), (state->card->iobase + ALI_SCR));
2242                         break;
2243                 default:        /* nothing else is ever supported by the chipset */
2244                         val = ret;
2245                         break;
2246                 }
2247                 return put_user(val, p);
2248         case SNDCTL_DSP_POST:   /* the user has sent all data and is notifying us */
2249                 /* we update the swptr to the end of the last sg segment then return */
2250 #ifdef DEBUG
2251                 printk("SNDCTL_DSP_POST\n");
2252 #endif
2253                 if (codec_independent_spdif_locked > 0) {
2254                         if (!dmabuf->ready || (dmabuf->enable != CODEC_SPDIFOUT_RUNNING))
2255                                 return 0;
2256                 } else {
2257                         if (controller_independent_spdif_locked > 0) {
2258                                 if (!dmabuf->ready || (dmabuf->enable != CONTROLLER_SPDIFOUT_RUNNING))
2259                                         return 0;
2260                         } else {
2261                                 if (!dmabuf->ready || (dmabuf->enable != DAC_RUNNING))
2262                                         return 0;
2263                         }
2264                 }
2265                 if ((dmabuf->swptr % dmabuf->fragsize) != 0) {
2266                         val = dmabuf->fragsize - (dmabuf->swptr % dmabuf->fragsize);
2267                         dmabuf->swptr += val;
2268                         dmabuf->count += val;
2269                 }
2270                 return 0;
2271         case SNDCTL_DSP_SUBDIVIDE:
2272                 if (dmabuf->subdivision)
2273                         return -EINVAL;
2274                 if (get_user(val, p))
2275                         return -EFAULT;
2276                 if (val != 1 && val != 2 && val != 4)
2277                         return -EINVAL;
2278 #ifdef DEBUG
2279                 printk("SNDCTL_DSP_SUBDIVIDE %d\n", val);
2280 #endif
2281                 dmabuf->subdivision = val;
2282                 dmabuf->ready = 0;
2283                 return 0;
2284         case SNDCTL_DSP_SETFRAGMENT:
2285                 if (get_user(val, p))
2286                         return -EFAULT;
2287                 dmabuf->ossfragsize = 1 << (val & 0xffff);
2288                 dmabuf->ossmaxfrags = (val >> 16) & 0xffff;
2289                 if (!dmabuf->ossfragsize || !dmabuf->ossmaxfrags)
2290                         return -EINVAL;
2291                 /*
2292                  * Bound the frag size into our allowed range of 256 - 4096
2293                  */
2294                 if (dmabuf->ossfragsize < 256)
2295                         dmabuf->ossfragsize = 256;
2296                 else if (dmabuf->ossfragsize > 4096)
2297                         dmabuf->ossfragsize = 4096;
2298                 /*
2299                  * The numfrags could be something reasonable, or it could
2300                  * be 0xffff meaning "Give me as much as possible".  So,
2301                  * we check the numfrags * fragsize doesn't exceed our
2302                  * 64k buffer limit, nor is it less than our 8k minimum.
2303                  * If it fails either one of these checks, then adjust the
2304                  * number of fragments, not the size of them.  It's OK if
2305                  * our number of fragments doesn't equal 32 or anything
2306                  * like our hardware based number now since we are using
2307                  * a different frag count for the hardware.  Before we get
2308                  * into this though, bound the maxfrags to avoid overflow
2309                  * issues.  A reasonable bound would be 64k / 256 since our
2310                  * maximum buffer size is 64k and our minimum frag size is
2311                  * 256.  On the other end, our minimum buffer size is 8k and
2312                  * our maximum frag size is 4k, so the lower bound should
2313                  * be 2.
2314                  */
2315                 if (dmabuf->ossmaxfrags > 256)
2316                         dmabuf->ossmaxfrags = 256;
2317                 else if (dmabuf->ossmaxfrags < 2)
2318                         dmabuf->ossmaxfrags = 2;
2319                 val = dmabuf->ossfragsize * dmabuf->ossmaxfrags;
2320                 while (val < 8192) {
2321                         val <<= 1;
2322                         dmabuf->ossmaxfrags <<= 1;
2323                 }
2324                 while (val > 65536) {
2325                         val >>= 1;
2326                         dmabuf->ossmaxfrags >>= 1;
2327                 }
2328                 dmabuf->ready = 0;
2329 #ifdef DEBUG
2330                 printk("SNDCTL_DSP_SETFRAGMENT 0x%x, %d, %d\n", val,
2331                        dmabuf->ossfragsize, dmabuf->ossmaxfrags);
2332 #endif
2333                 return 0;
2334         case SNDCTL_DSP_GETOSPACE:
2335                 if (!(file->f_mode & FMODE_WRITE))
2336                         return -EINVAL;
2337                 if (codec_independent_spdif_locked > 0) {
2338                         if (!dmabuf->ready && (val = prog_dmabuf(state, 2)) != 0)
2339                                 return val;
2340                 } else {
2341                         if (controller_independent_spdif_locked > 0) {
2342                                 if (!dmabuf->ready && (val = prog_dmabuf(state, 3)) != 0)
2343                                         return val;
2344                         } else {
2345                                 if (!dmabuf->ready && (val = prog_dmabuf(state, 0)) != 0)
2346                                         return val;
2347                         }
2348                 }
2349                 spin_lock_irqsave(&state->card->lock, flags);
2350                 ali_update_ptr(state);
2351                 abinfo.fragsize = dmabuf->userfragsize;
2352                 abinfo.fragstotal = dmabuf->userfrags;
2353                 if (dmabuf->mapped)
2354                         abinfo.bytes = dmabuf->dmasize;
2355                 else
2356                         abinfo.bytes = ali_get_free_write_space(state);
2357                 abinfo.fragments = abinfo.bytes / dmabuf->userfragsize;
2358                 spin_unlock_irqrestore(&state->card->lock, flags);
2359 #if defined(DEBUG) || defined(DEBUG_MMAP)
2360                 printk("SNDCTL_DSP_GETOSPACE %d, %d, %d, %d\n",
2361                        abinfo.bytes, abinfo.fragsize, abinfo.fragments,
2362                        abinfo.fragstotal);
2363 #endif
2364                 return copy_to_user(argp, &abinfo,
2365                                     sizeof(abinfo)) ? -EFAULT : 0;
2366         case SNDCTL_DSP_GETOPTR:
2367                 if (!(file->f_mode & FMODE_WRITE))
2368                         return -EINVAL;
2369                 if (codec_independent_spdif_locked > 0) {
2370                         if (!dmabuf->ready && (val = prog_dmabuf(state, 2)) != 0)
2371                                 return val;
2372                 } else {
2373                         if (controller_independent_spdif_locked > 0) {
2374                                 if (!dmabuf->ready && (val = prog_dmabuf(state, 3)) != 0)
2375                                         return val;
2376                         } else {
2377                                 if (!dmabuf->ready && (val = prog_dmabuf(state, 0)) != 0)
2378                                         return val;
2379                         }
2380                 }
2381                 spin_lock_irqsave(&state->card->lock, flags);
2382                 val = ali_get_free_write_space(state);
2383                 cinfo.bytes = dmabuf->total_bytes;
2384                 cinfo.ptr = dmabuf->hwptr;
2385                 cinfo.blocks = val / dmabuf->userfragsize;
2386                 if (codec_independent_spdif_locked > 0) {
2387                         if (dmabuf->mapped && (dmabuf->trigger & SPDIF_ENABLE_OUTPUT)) {
2388                                 dmabuf->count += val;
2389                                 dmabuf->swptr = (dmabuf->swptr + val) % dmabuf->dmasize;
2390                                 __ali_update_lvi(state, 2);
2391                         }
2392                 } else {
2393                         if (controller_independent_spdif_locked > 0) {
2394                                 if (dmabuf->mapped && (dmabuf->trigger & SPDIF_ENABLE_OUTPUT)) {
2395                                         dmabuf->count += val;
2396                                         dmabuf->swptr = (dmabuf->swptr + val) % dmabuf->dmasize;
2397                                         __ali_update_lvi(state, 3);
2398                                 }
2399                         } else {
2400                                 if (dmabuf->mapped && (dmabuf->trigger & PCM_ENABLE_OUTPUT)) {
2401                                         dmabuf->count += val;
2402                                         dmabuf->swptr = (dmabuf->swptr + val) % dmabuf->dmasize;
2403                                         __ali_update_lvi(state, 0);
2404                                 }
2405                         }
2406                 }
2407                 spin_unlock_irqrestore(&state->card->lock, flags);
2408 #if defined(DEBUG) || defined(DEBUG_MMAP)
2409                 printk("SNDCTL_DSP_GETOPTR %d, %d, %d, %d\n", cinfo.bytes,
2410                        cinfo.blocks, cinfo.ptr, dmabuf->count);
2411 #endif
2412                 return copy_to_user(argp, &cinfo, sizeof(cinfo))? -EFAULT : 0;
2413         case SNDCTL_DSP_GETISPACE:
2414                 if (!(file->f_mode & FMODE_READ))
2415                         return -EINVAL;
2416                 if (!dmabuf->ready && (val = prog_dmabuf(state, 1)) != 0)
2417                         return val;
2418                 spin_lock_irqsave(&state->card->lock, flags);
2419                 abinfo.bytes = ali_get_available_read_data(state);
2420                 abinfo.fragsize = dmabuf->userfragsize;
2421                 abinfo.fragstotal = dmabuf->userfrags;
2422                 abinfo.fragments = abinfo.bytes / dmabuf->userfragsize;
2423                 spin_unlock_irqrestore(&state->card->lock, flags);
2424 #if defined(DEBUG) || defined(DEBUG_MMAP)
2425                 printk("SNDCTL_DSP_GETISPACE %d, %d, %d, %d\n",
2426                        abinfo.bytes, abinfo.fragsize, abinfo.fragments,
2427                        abinfo.fragstotal);
2428 #endif
2429                 return copy_to_user(argp, &abinfo,
2430                                     sizeof(abinfo)) ? -EFAULT : 0;
2431         case SNDCTL_DSP_GETIPTR:
2432                 if (!(file->f_mode & FMODE_READ))
2433                         return -EINVAL;
2434                 if (!dmabuf->ready && (val = prog_dmabuf(state, 0)) != 0)
2435                         return val;
2436                 spin_lock_irqsave(&state->card->lock, flags);
2437                 val = ali_get_available_read_data(state);
2438                 cinfo.bytes = dmabuf->total_bytes;
2439                 cinfo.blocks = val / dmabuf->userfragsize;
2440                 cinfo.ptr = dmabuf->hwptr;
2441                 if (dmabuf->mapped && (dmabuf->trigger & PCM_ENABLE_INPUT)) {
2442                         dmabuf->count -= val;
2443                         dmabuf->swptr = (dmabuf->swptr + val) % dmabuf->dmasize;
2444                         __ali_update_lvi(state, 1);
2445                 }
2446                 spin_unlock_irqrestore(&state->card->lock, flags);
2447 #if defined(DEBUG) || defined(DEBUG_MMAP)
2448                 printk("SNDCTL_DSP_GETIPTR %d, %d, %d, %d\n", cinfo.bytes,
2449                        cinfo.blocks, cinfo.ptr, dmabuf->count);
2450 #endif
2451                 return copy_to_user(argp, &cinfo, sizeof(cinfo))? -EFAULT: 0;
2452         case SNDCTL_DSP_NONBLOCK:
2453 #ifdef DEBUG
2454                 printk("SNDCTL_DSP_NONBLOCK\n");
2455 #endif
2456                 file->f_flags |= O_NONBLOCK;
2457                 return 0;
2458         case SNDCTL_DSP_GETCAPS:
2459 #ifdef DEBUG
2460                 printk("SNDCTL_DSP_GETCAPS\n");
2461 #endif
2462                 return put_user(DSP_CAP_REALTIME | DSP_CAP_TRIGGER |
2463                                 DSP_CAP_MMAP | DSP_CAP_BIND, p);
2464         case SNDCTL_DSP_GETTRIGGER:
2465                 val = 0;
2466 #ifdef DEBUG
2467                 printk("SNDCTL_DSP_GETTRIGGER 0x%x\n", dmabuf->trigger);
2468 #endif
2469                 return put_user(dmabuf->trigger, p);
2470         case SNDCTL_DSP_SETTRIGGER:
2471                 if (get_user(val, p))
2472                         return -EFAULT;
2473 #if defined(DEBUG) || defined(DEBUG_MMAP)
2474                 printk("SNDCTL_DSP_SETTRIGGER 0x%x\n", val);
2475 #endif
2476                 if (!(val & PCM_ENABLE_INPUT) && dmabuf->enable == ADC_RUNNING) {
2477                         stop_adc(state);
2478                 }
2479                 if (!(val & PCM_ENABLE_OUTPUT) && dmabuf->enable == DAC_RUNNING) {
2480                         stop_dac(state);
2481                 }
2482                 if (!(val & SPDIF_ENABLE_OUTPUT) && dmabuf->enable == CODEC_SPDIFOUT_RUNNING) {
2483                         stop_spdifout(state);
2484                 }
2485                 if (!(val & SPDIF_ENABLE_OUTPUT) && dmabuf->enable == CONTROLLER_SPDIFOUT_RUNNING) {
2486                         stop_spdifout(state);
2487                 }
2488                 dmabuf->trigger = val;
2489                 if (val & PCM_ENABLE_OUTPUT && !(dmabuf->enable & DAC_RUNNING)) {
2490                         if (!dmabuf->write_channel) {
2491                                 dmabuf->ready = 0;
2492                                 dmabuf->write_channel = state->card->alloc_pcm_channel(state->card);
2493                                 if (!dmabuf->write_channel)
2494                                         return -EBUSY;
2495                         }
2496                         if (!dmabuf->ready && (ret = prog_dmabuf(state, 0)))
2497                                 return ret;
2498                         if (dmabuf->mapped) {
2499                                 spin_lock_irqsave(&state->card->lock, flags);
2500                                 ali_update_ptr(state);
2501                                 dmabuf->count = 0;
2502                                 dmabuf->swptr = dmabuf->hwptr;
2503                                 dmabuf->count = ali_get_free_write_space(state);
2504                                 dmabuf->swptr = (dmabuf->swptr + dmabuf->count) % dmabuf->dmasize;
2505                                 __ali_update_lvi(state, 0);
2506                                 spin_unlock_irqrestore(&state->card->lock,
2507                                                        flags);
2508                         } else
2509                                 start_dac(state);
2510                 }
2511                 if (val & SPDIF_ENABLE_OUTPUT && !(dmabuf->enable & CODEC_SPDIFOUT_RUNNING)) {
2512                         if (!dmabuf->codec_spdifout_channel) {
2513                                 dmabuf->ready = 0;
2514                                 dmabuf->codec_spdifout_channel = state->card->alloc_codec_spdifout_channel(state->card);
2515                                 if (!dmabuf->codec_spdifout_channel)
2516                                         return -EBUSY;
2517                         }
2518                         if (!dmabuf->ready && (ret = prog_dmabuf(state, 2)))
2519                                 return ret;
2520                         if (dmabuf->mapped) {
2521                                 spin_lock_irqsave(&state->card->lock, flags);
2522                                 ali_update_ptr(state);
2523                                 dmabuf->count = 0;
2524                                 dmabuf->swptr = dmabuf->hwptr;
2525                                 dmabuf->count = ali_get_free_write_space(state);
2526                                 dmabuf->swptr = (dmabuf->swptr + dmabuf->count) % dmabuf->dmasize;
2527                                 __ali_update_lvi(state, 2);
2528                                 spin_unlock_irqrestore(&state->card->lock,
2529                                                        flags);
2530                         } else
2531                                 start_spdifout(state);
2532                 }
2533                 if (val & SPDIF_ENABLE_OUTPUT && !(dmabuf->enable & CONTROLLER_SPDIFOUT_RUNNING)) {
2534                         if (!dmabuf->controller_spdifout_channel) {
2535                                 dmabuf->ready = 0;
2536                                 dmabuf->controller_spdifout_channel = state->card->alloc_controller_spdifout_channel(state->card);
2537                                 if (!dmabuf->controller_spdifout_channel)
2538                                         return -EBUSY;
2539                         }
2540                         if (!dmabuf->ready && (ret = prog_dmabuf(state, 3)))
2541                                 return ret;
2542                         if (dmabuf->mapped) {
2543                                 spin_lock_irqsave(&state->card->lock, flags);
2544                                 ali_update_ptr(state);
2545                                 dmabuf->count = 0;
2546                                 dmabuf->swptr = dmabuf->hwptr;
2547                                 dmabuf->count = ali_get_free_write_space(state);
2548                                 dmabuf->swptr = (dmabuf->swptr + dmabuf->count) % dmabuf->dmasize;
2549                                 __ali_update_lvi(state, 3);
2550                                 spin_unlock_irqrestore(&state->card->lock, flags);
2551                         } else
2552                                 start_spdifout(state);
2553                 }
2554                 if (val & PCM_ENABLE_INPUT && !(dmabuf->enable & ADC_RUNNING)) {
2555                         if (!dmabuf->read_channel) {
2556                                 dmabuf->ready = 0;
2557                                 dmabuf->read_channel = state->card->alloc_rec_pcm_channel(state->card);
2558                                 if (!dmabuf->read_channel)
2559                                         return -EBUSY;
2560                         }
2561                         if (!dmabuf->ready && (ret = prog_dmabuf(state, 1)))
2562                                 return ret;
2563                         if (dmabuf->mapped) {
2564                                 spin_lock_irqsave(&state->card->lock,
2565                                                   flags);
2566                                 ali_update_ptr(state);
2567                                 dmabuf->swptr = dmabuf->hwptr;
2568                                 dmabuf->count = 0;
2569                                 spin_unlock_irqrestore(&state->card->lock, flags);
2570                         }
2571                         ali_update_lvi(state, 1);
2572                         start_adc(state);
2573                 }
2574                 return 0;
2575         case SNDCTL_DSP_SETDUPLEX:
2576 #ifdef DEBUG
2577                 printk("SNDCTL_DSP_SETDUPLEX\n");
2578 #endif
2579                 return -EINVAL;
2580         case SNDCTL_DSP_GETODELAY:
2581                 if (!(file->f_mode & FMODE_WRITE))
2582                         return -EINVAL;
2583                 spin_lock_irqsave(&state->card->lock, flags);
2584                 ali_update_ptr(state);
2585                 val = dmabuf->count;
2586                 spin_unlock_irqrestore(&state->card->lock, flags);
2587 #ifdef DEBUG
2588                 printk("SNDCTL_DSP_GETODELAY %d\n", dmabuf->count);
2589 #endif
2590                 return put_user(val, p);
2591         case SOUND_PCM_READ_RATE:
2592 #ifdef DEBUG
2593                 printk("SOUND_PCM_READ_RATE %d\n", dmabuf->rate);
2594 #endif
2595                 return put_user(dmabuf->rate, p);
2596         case SOUND_PCM_READ_CHANNELS:
2597 #ifdef DEBUG
2598                 printk("SOUND_PCM_READ_CHANNELS\n");
2599 #endif
2600                 return put_user(2, p);
2601         case SOUND_PCM_READ_BITS:
2602 #ifdef DEBUG
2603                 printk("SOUND_PCM_READ_BITS\n");
2604 #endif
2605                 return put_user(AFMT_S16_LE, p);
2606         case SNDCTL_DSP_SETSPDIF:       /* Set S/PDIF Control register */
2607 #ifdef DEBUG
2608                 printk("SNDCTL_DSP_SETSPDIF\n");
2609 #endif
2610                 if (get_user(val, p))
2611                         return -EFAULT;
2612                 /* Check to make sure the codec supports S/PDIF transmitter */
2613                 if ((state->card->ac97_features & 4)) {
2614                         /* mask out the transmitter speed bits so the user can't set them */
2615                         val &= ~0x3000;
2616                         /* Add the current transmitter speed bits to the passed value */
2617                         ret = ali_ac97_get(codec, AC97_SPDIF_CONTROL);
2618                         val |= (ret & 0x3000);
2619                         ali_ac97_set(codec, AC97_SPDIF_CONTROL, val);
2620                         if (ali_ac97_get(codec, AC97_SPDIF_CONTROL) != val) {
2621                                 printk(KERN_ERR "ali_audio: Unable to set S/PDIF configuration to 0x%04x.\n", val);
2622                                 return -EFAULT;
2623                         }
2624                 }
2625 #ifdef DEBUG
2626                 else
2627                         printk(KERN_WARNING "ali_audio: S/PDIF transmitter not avalible.\n");
2628 #endif
2629                 return put_user(val, p);
2630         case SNDCTL_DSP_GETSPDIF:       /* Get S/PDIF Control register */
2631 #ifdef DEBUG
2632                 printk("SNDCTL_DSP_GETSPDIF\n");
2633 #endif
2634                 if (get_user(val, p))
2635                         return -EFAULT;
2636                 /* Check to make sure the codec supports S/PDIF transmitter */
2637                 if (!(state->card->ac97_features & 4)) {
2638 #ifdef DEBUG
2639                         printk(KERN_WARNING "ali_audio: S/PDIF transmitter not avalible.\n");
2640 #endif
2641                         val = 0;
2642                 } else {
2643                         val = ali_ac97_get(codec, AC97_SPDIF_CONTROL);
2644                 }
2645
2646                 return put_user(val, p);
2647 //end add support spdif out
2648 //add support 4,6 channel
2649         case SNDCTL_DSP_GETCHANNELMASK:
2650 #ifdef DEBUG
2651                 printk("SNDCTL_DSP_GETCHANNELMASK\n");
2652 #endif
2653                 if (get_user(val, p))
2654                         return -EFAULT;
2655                 /* Based on AC'97 DAC support, not ICH hardware */
2656                 val = DSP_BIND_FRONT;
2657                 if (state->card->ac97_features & 0x0004)
2658                         val |= DSP_BIND_SPDIF;
2659                 if (state->card->ac97_features & 0x0080)
2660                         val |= DSP_BIND_SURR;
2661                 if (state->card->ac97_features & 0x0140)
2662                         val |= DSP_BIND_CENTER_LFE;
2663                 return put_user(val, p);
2664         case SNDCTL_DSP_BIND_CHANNEL:
2665 #ifdef DEBUG
2666                 printk("SNDCTL_DSP_BIND_CHANNEL\n");
2667 #endif
2668                 if (get_user(val, p))
2669                         return -EFAULT;
2670                 if (val == DSP_BIND_QUERY) {
2671                         val = DSP_BIND_FRONT;   /* Always report this as being enabled */
2672                         if (state->card->ac97_status & SPDIF_ON)
2673                                 val |= DSP_BIND_SPDIF;
2674                         else {
2675                                 if (state->card->ac97_status & SURR_ON)
2676                                         val |= DSP_BIND_SURR;
2677                                 if (state->card->
2678                                     ac97_status & CENTER_LFE_ON)
2679                                         val |= DSP_BIND_CENTER_LFE;
2680                         }
2681                 } else {        /* Not a query, set it */
2682                         if (!(file->f_mode & FMODE_WRITE))
2683                                 return -EINVAL;
2684                         if (dmabuf->enable == DAC_RUNNING) {
2685                                 stop_dac(state);
2686                         }
2687                         if (val & DSP_BIND_SPDIF) {     /* Turn on SPDIF */
2688                                 /*  Ok, this should probably define what slots
2689                                  *  to use. For now, we'll only set it to the
2690                                  *  defaults:
2691                                  *
2692                                  *   non multichannel codec maps to slots 3&4
2693                                  *   2 channel codec maps to slots 7&8
2694                                  *   4 channel codec maps to slots 6&9
2695                                  *   6 channel codec maps to slots 10&11
2696                                  *
2697                                  *  there should be some way for the app to
2698                                  *  select the slot assignment.
2699                                  */
2700                                 i_scr = inl(state->card->iobase + ALI_SCR);
2701                                 if (codec_independent_spdif_locked > 0) {
2702
2703                                         if ((i_scr & 0x00300000) == 0x00100000) {
2704                                                 ali_set_spdif_output(state, AC97_EA_SPSA_7_8, codec_independent_spdif_locked);
2705                                         } else {
2706                                                 if ((i_scr & 0x00300000) == 0x00200000) {
2707                                                         ali_set_spdif_output(state, AC97_EA_SPSA_6_9, codec_independent_spdif_locked);
2708                                                 } else {
2709                                                         if ((i_scr & 0x00300000) == 0x00300000) {
2710                                                                 ali_set_spdif_output(state, AC97_EA_SPSA_10_11, codec_independent_spdif_locked);
2711                                                         }
2712                                                 }
2713                                         }
2714                                 } else {        /* codec spdif out (pcm out share ) */
2715                                         ali_set_spdif_output(state, AC97_EA_SPSA_3_4, dmabuf->rate);    //I do not modify
2716                                 }
2717
2718                                 if (!(state->card->ac97_status & SPDIF_ON))
2719                                         val &= ~DSP_BIND_SPDIF;
2720                         } else {
2721                                 int mask;
2722                                 int channels;
2723                                 /* Turn off S/PDIF if it was on */
2724                                 if (state->card->ac97_status & SPDIF_ON)
2725                                         ali_set_spdif_output(state, -1, 0);
2726                                 mask =
2727                                     val & (DSP_BIND_FRONT | DSP_BIND_SURR |
2728                                            DSP_BIND_CENTER_LFE);
2729                                 switch (mask) {
2730                                 case DSP_BIND_FRONT:
2731                                         channels = 2;
2732                                         break;
2733                                 case DSP_BIND_FRONT | DSP_BIND_SURR:
2734                                         channels = 4;
2735                                         break;
2736                                 case DSP_BIND_FRONT | DSP_BIND_SURR | DSP_BIND_CENTER_LFE:
2737                                         channels = 6;
2738                                         break;
2739                                 default:
2740                                         val = DSP_BIND_FRONT;
2741                                         channels = 2;
2742                                         break;
2743                                 }
2744                                 ali_set_dac_channels(state, channels);
2745                                 /* check that they really got turned on */
2746                                 if (!state->card->ac97_status & SURR_ON)
2747                                         val &= ~DSP_BIND_SURR;
2748                                 if (!state->card->
2749                                     ac97_status & CENTER_LFE_ON)
2750                                         val &= ~DSP_BIND_CENTER_LFE;
2751                         }
2752                 }
2753                 return put_user(val, p);
2754         case SNDCTL_DSP_MAPINBUF:
2755         case SNDCTL_DSP_MAPOUTBUF:
2756         case SNDCTL_DSP_SETSYNCRO:
2757         case SOUND_PCM_WRITE_FILTER:
2758         case SOUND_PCM_READ_FILTER:
2759                 return -EINVAL;
2760         }
2761         return -EINVAL;
2762 }
2763
2764 static int ali_open(struct inode *inode, struct file *file)
2765 {
2766         int i = 0;
2767         struct ali_card *card = devs;
2768         struct ali_state *state = NULL;
2769         struct dmabuf *dmabuf = NULL;
2770         unsigned int i_scr;
2771
2772         /* find an available virtual channel (instance of /dev/dsp) */
2773
2774         while (card != NULL) {
2775
2776                 /*
2777                  * If we are initializing and then fail, card could go
2778                  * away unuexpectedly while we are in the for() loop.
2779                  * So, check for card on each iteration before we check
2780                  * for card->initializing to avoid a possible oops.
2781                  * This usually only matters for times when the driver is
2782                  * autoloaded by kmod.
2783                  */
2784                 for (i = 0; i < 50 && card && card->initializing; i++) {
2785                         set_current_state(TASK_UNINTERRUPTIBLE);
2786                         schedule_timeout(HZ / 20);
2787                 }
2788
2789                 for (i = 0; i < NR_HW_CH && card && !card->initializing; i++) {
2790                         if (card->states[i] == NULL) {
2791                                 state = card->states[i] = (struct ali_state *) kmalloc(sizeof(struct ali_state), GFP_KERNEL);
2792                                 if (state == NULL)
2793                                         return -ENOMEM;
2794                                 memset(state, 0, sizeof(struct ali_state));
2795                                 dmabuf = &state->dmabuf;
2796                                 goto found_virt;
2797                         }
2798                 }
2799                 card = card->next;
2800         }
2801
2802         /* no more virtual channel avaiable */
2803         if (!state)
2804                 return -ENODEV;
2805 found_virt:
2806         /* initialize the virtual channel */
2807
2808         state->virt = i;
2809         state->card = card;
2810         state->magic = ALI5455_STATE_MAGIC;
2811         init_waitqueue_head(&dmabuf->wait);
2812         mutex_init(&state->open_mutex);
2813         file->private_data = state;
2814         dmabuf->trigger = 0;
2815         /* allocate hardware channels */
2816         if (file->f_mode & FMODE_READ) {
2817                 if ((dmabuf->read_channel =
2818                      card->alloc_rec_pcm_channel(card)) == NULL) {
2819                         kfree(card->states[i]);
2820                         card->states[i] = NULL;
2821                         return -EBUSY;
2822                 }
2823                 dmabuf->trigger |= PCM_ENABLE_INPUT;
2824                 ali_set_adc_rate(state, 8000);
2825         }
2826         if (file->f_mode & FMODE_WRITE) {
2827                 if (codec_independent_spdif_locked > 0) {
2828                         if ((dmabuf->codec_spdifout_channel = card->alloc_codec_spdifout_channel(card)) == NULL) {
2829                                 kfree(card->states[i]);
2830                                 card->states[i] = NULL;
2831                                 return -EBUSY;
2832                         }
2833                         dmabuf->trigger |= SPDIF_ENABLE_OUTPUT;
2834                         ali_set_codecspdifout_rate(state, codec_independent_spdif_locked);      //It must add
2835                         i_scr = inl(state->card->iobase + ALI_SCR);
2836                         if ((i_scr & 0x00300000) == 0x00100000) {
2837                                 ali_set_spdif_output(state, AC97_EA_SPSA_7_8, codec_independent_spdif_locked);
2838                         } else {
2839                                 if ((i_scr & 0x00300000) == 0x00200000) {
2840                                         ali_set_spdif_output(state, AC97_EA_SPSA_6_9, codec_independent_spdif_locked);
2841                                 } else {
2842                                         if ((i_scr & 0x00300000) == 0x00300000) {
2843                                                 ali_set_spdif_output(state, AC97_EA_SPSA_10_11, codec_independent_spdif_locked);
2844                                         } else {
2845                                                 ali_set_spdif_output(state, AC97_EA_SPSA_7_8, codec_independent_spdif_locked);
2846                                         }
2847                                 }
2848
2849                         }
2850                 } else {
2851                         if (controller_independent_spdif_locked > 0) {
2852                                 if ((dmabuf->controller_spdifout_channel = card->alloc_controller_spdifout_channel(card)) == NULL) {
2853                                         kfree(card->states[i]);
2854                                         card->states[i] = NULL;
2855                                         return -EBUSY;
2856                                 }
2857                                 dmabuf->trigger |= SPDIF_ENABLE_OUTPUT;
2858                                 ali_set_spdifout_rate(state, controller_independent_spdif_locked);
2859                         } else {
2860                                 if ((dmabuf->write_channel = card->alloc_pcm_channel(card)) == NULL) {
2861                                         kfree(card->states[i]);
2862                                         card->states[i] = NULL;
2863                                         return -EBUSY;
2864                                 }
2865                                 /* Initialize to 8kHz?  What if we don't support 8kHz? */
2866                                 /*  Let's change this to check for S/PDIF stuff */
2867
2868                                 dmabuf->trigger |= PCM_ENABLE_OUTPUT;
2869                                 if (codec_pcmout_share_spdif_locked) {
2870                                         ali_set_dac_rate(state, codec_pcmout_share_spdif_locked);
2871                                         ali_set_spdif_output(state, AC97_EA_SPSA_3_4, codec_pcmout_share_spdif_locked);
2872                                 } else {
2873                                         ali_set_dac_rate(state, 8000);
2874                                 }
2875                         }
2876
2877                 }
2878         }
2879
2880         /* set default sample format. According to OSS Programmer's Guide  /dev/dsp
2881            should be default to unsigned 8-bits, mono, with sample rate 8kHz and
2882            /dev/dspW will accept 16-bits sample, but we don't support those so we
2883            set it immediately to stereo and 16bit, which is all we do support */
2884         dmabuf->fmt |= ALI5455_FMT_16BIT | ALI5455_FMT_STEREO;
2885         dmabuf->ossfragsize = 0;
2886         dmabuf->ossmaxfrags = 0;
2887         dmabuf->subdivision = 0;
2888         state->open_mode |= file->f_mode & (FMODE_READ | FMODE_WRITE);
2889         outl(0x00000000, card->iobase + ALI_INTERRUPTCR);
2890         outl(0x00000000, card->iobase + ALI_INTERRUPTSR);
2891         return nonseekable_open(inode, file);
2892 }
2893
2894 static int ali_release(struct inode *inode, struct file *file)
2895 {
2896         struct ali_state *state = (struct ali_state *) file->private_data;
2897         struct ali_card *card = state->card;
2898         struct dmabuf *dmabuf = &state->dmabuf;
2899         unsigned long flags;
2900         lock_kernel();
2901
2902         /* stop DMA state machine and free DMA buffers/channels */
2903         if (dmabuf->trigger & PCM_ENABLE_OUTPUT)
2904                 drain_dac(state, 0);
2905
2906         if (dmabuf->trigger & SPDIF_ENABLE_OUTPUT)
2907                 drain_spdifout(state, 0);
2908
2909         if (dmabuf->trigger & PCM_ENABLE_INPUT)
2910                 stop_adc(state);
2911
2912         spin_lock_irqsave(&card->lock, flags);
2913         dealloc_dmabuf(state);
2914         if (file->f_mode & FMODE_WRITE) {
2915                 if (codec_independent_spdif_locked > 0) {
2916                         state->card->free_pcm_channel(state->card, dmabuf->codec_spdifout_channel->num);
2917                 } else {
2918                         if (controller_independent_spdif_locked > 0)
2919                                 state->card->free_pcm_channel(state->card,
2920                                                               dmabuf->controller_spdifout_channel->num);
2921                         else state->card->free_pcm_channel(state->card,
2922                                                               dmabuf->write_channel->num);
2923                 }
2924         }
2925         if (file->f_mode & FMODE_READ)
2926                 state->card->free_pcm_channel(state->card, dmabuf->read_channel->num);
2927
2928         state->card->states[state->virt] = NULL;
2929         kfree(state);
2930         spin_unlock_irqrestore(&card->lock, flags);
2931         unlock_kernel();
2932         return 0;
2933 }
2934
2935 static /*const */ struct file_operations ali_audio_fops = {
2936         .owner          = THIS_MODULE,
2937         .llseek         = no_llseek,
2938         .read           = ali_read,
2939         .write          = ali_write,
2940         .poll           = ali_poll,
2941         .ioctl          = ali_ioctl,
2942         .mmap           = ali_mmap,
2943         .open           = ali_open,
2944         .release        = ali_release,
2945 };
2946
2947 /* Read AC97 codec registers */
2948 static u16 ali_ac97_get(struct ac97_codec *dev, u8 reg)
2949 {
2950         struct ali_card *card = dev->private_data;
2951         int count1 = 100;
2952         char val;
2953         unsigned short int data = 0, count, addr1, addr2 = 0;
2954
2955         spin_lock(&card->ac97_lock);
2956         while (count1-- && (inl(card->iobase + ALI_CAS) & 0x80000000))
2957                 udelay(1);
2958
2959         addr1 = reg;
2960         reg |= 0x0080;
2961         for (count = 0; count < 0x7f; count++) {
2962                 val = inb(card->iobase + ALI_CSPSR);
2963                 if (val & 0x08)
2964                         break;
2965         }
2966         if (count == 0x7f)
2967         {
2968                 spin_unlock(&card->ac97_lock);
2969                 return -1;
2970         }
2971         outw(reg, (card->iobase + ALI_CPR) + 2);
2972         for (count = 0; count < 0x7f; count++) {
2973                 val = inb(card->iobase + ALI_CSPSR);
2974                 if (val & 0x02) {
2975                         data = inw(card->iobase + ALI_SPR);
2976                         addr2 = inw((card->iobase + ALI_SPR) + 2);
2977                         break;
2978                 }
2979         }
2980         spin_unlock(&card->ac97_lock);
2981         if (count == 0x7f)
2982                 return -1;
2983         if (addr2 != addr1)
2984                 return -1;
2985         return ((u16) data);
2986 }
2987
2988 /* write ac97 codec register   */
2989
2990 static void ali_ac97_set(struct ac97_codec *dev, u8 reg, u16 data)
2991 {
2992         struct ali_card *card = dev->private_data;
2993         int count1 = 100;
2994         char val;
2995         unsigned short int count;
2996
2997         spin_lock(&card->ac97_lock);
2998         while (count1-- && (inl(card->iobase + ALI_CAS) & 0x80000000))
2999                 udelay(1);
3000
3001         for (count = 0; count < 0x7f; count++) {
3002                 val = inb(card->iobase + ALI_CSPSR);
3003                 if (val & 0x08)
3004                         break;
3005         }
3006         if (count == 0x7f) {
3007                 printk(KERN_WARNING "ali_ac97_set: AC97 codec register access timed out. \n");
3008                 spin_unlock(&card->ac97_lock);
3009                 return;
3010         }
3011         outw(data, (card->iobase + ALI_CPR));
3012         outb(reg, (card->iobase + ALI_CPR) + 2);
3013         for (count = 0; count < 0x7f; count++) {
3014                 val = inb(card->iobase + ALI_CSPSR);
3015                 if (val & 0x01)
3016                         break;
3017         }
3018         spin_unlock(&card->ac97_lock);
3019         if (count == 0x7f)
3020                 printk(KERN_WARNING "ali_ac97_set: AC97 codec register access timed out. \n");
3021         return;
3022 }
3023
3024 /* OSS /dev/mixer file operation methods */
3025
3026 static int ali_open_mixdev(struct inode *inode, struct file *file)
3027 {
3028         int i;
3029         int minor = iminor(inode);
3030         struct ali_card *card = devs;
3031         for (card = devs; card != NULL; card = card->next) {
3032                 /*
3033                  * If we are initializing and then fail, card could go
3034                  * away unuexpectedly while we are in the for() loop.
3035                  * So, check for card on each iteration before we check
3036                  * for card->initializing to avoid a possible oops.
3037                  * This usually only matters for times when the driver is
3038                  * autoloaded by kmod.
3039                  */
3040                 for (i = 0; i < 50 && card && card->initializing; i++) {
3041                         set_current_state(TASK_UNINTERRUPTIBLE);
3042                         schedule_timeout(HZ / 20);
3043                 }
3044                 for (i = 0; i < NR_AC97 && card && !card->initializing; i++)
3045                         if (card->ac97_codec[i] != NULL
3046                             && card->ac97_codec[i]->dev_mixer == minor) {
3047                                 file->private_data = card->ac97_codec[i];
3048                                 return nonseekable_open(inode, file);
3049                         }
3050         }
3051         return -ENODEV;
3052 }
3053
3054 static int ali_ioctl_mixdev(struct inode *inode,
3055                             struct file *file,
3056                             unsigned int cmd, unsigned long arg)
3057 {
3058         struct ac97_codec *codec = (struct ac97_codec *) file->private_data;
3059         return codec->mixer_ioctl(codec, cmd, arg);
3060 }
3061
3062 static /*const */ struct file_operations ali_mixer_fops = {
3063         .owner  = THIS_MODULE,
3064         .llseek = no_llseek,
3065         .ioctl  = ali_ioctl_mixdev,
3066         .open   = ali_open_mixdev,
3067 };
3068
3069 /* AC97 codec initialisation.  These small functions exist so we don't
3070    duplicate code between module init and apm resume */
3071
3072 static inline int ali_ac97_exists(struct ali_card *card, int ac97_number)
3073 {
3074         unsigned int i = 1;
3075         u32 reg = inl(card->iobase + ALI_RTSR);
3076         if (ac97_number) {
3077                 while (i < 100) {
3078
3079                         reg = inl(card->iobase + ALI_RTSR);
3080                         if (reg & 0x40) {
3081                                 break;
3082                         } else {
3083                                 outl(reg | 0x00000040,
3084                                      card->iobase + 0x34);
3085                                 udelay(1);
3086                         }
3087                         i++;
3088                 }
3089
3090         } else {
3091                 while (i < 100) {
3092                         reg = inl(card->iobase + ALI_RTSR);
3093                         if (reg & 0x80) {
3094                                 break;
3095                         } else {
3096                                 outl(reg | 0x00000080,
3097                                      card->iobase + 0x34);
3098                                 udelay(1);
3099                         }
3100                         i++;
3101                 }
3102         }
3103
3104         if (ac97_number)
3105                 return reg & 0x40;
3106         else
3107                 return reg & 0x80;
3108 }
3109
3110 static inline int ali_ac97_enable_variable_rate(struct ac97_codec *codec)
3111 {
3112         ali_ac97_set(codec, AC97_EXTENDED_STATUS, 9);
3113         ali_ac97_set(codec, AC97_EXTENDED_STATUS, ali_ac97_get(codec, AC97_EXTENDED_STATUS) | 0xE800);
3114         return (ali_ac97_get(codec, AC97_EXTENDED_STATUS) & 1);
3115 }
3116
3117
3118 static int ali_ac97_probe_and_powerup(struct ali_card *card, struct ac97_codec *codec)
3119 {
3120         /* Returns 0 on failure */
3121         int i;
3122         u16 addr;
3123         if (ac97_probe_codec(codec) == 0)
3124                 return 0;
3125         /* ac97_probe_codec is success ,then begin to init codec */
3126         ali_ac97_set(codec, AC97_RESET, 0xffff);
3127         if (card->channel[0].used == 1) {
3128                 ali_ac97_set(codec, AC97_RECORD_SELECT, 0x0000);
3129                 ali_ac97_set(codec, AC97_LINEIN_VOL, 0x0808);
3130                 ali_ac97_set(codec, AC97_RECORD_GAIN, 0x0F0F);
3131         }
3132
3133         if (card->channel[2].used == 1) //if MICin then init codec
3134         {
3135                 ali_ac97_set(codec, AC97_RECORD_SELECT, 0x0000);
3136                 ali_ac97_set(codec, AC97_MIC_VOL, 0x8808);
3137                 ali_ac97_set(codec, AC97_RECORD_GAIN, 0x0F0F);
3138                 ali_ac97_set(codec, AC97_RECORD_GAIN_MIC, 0x0000);
3139         }
3140
3141         ali_ac97_set(codec, AC97_MASTER_VOL_STEREO, 0x0000);
3142         ali_ac97_set(codec, AC97_HEADPHONE_VOL, 0x0000);
3143         ali_ac97_set(codec, AC97_PCMOUT_VOL, 0x0000);
3144         ali_ac97_set(codec, AC97_CD_VOL, 0x0808);
3145         ali_ac97_set(codec, AC97_VIDEO_VOL, 0x0808);
3146         ali_ac97_set(codec, AC97_AUX_VOL, 0x0808);
3147         ali_ac97_set(codec, AC97_PHONE_VOL, 0x8048);
3148         ali_ac97_set(codec, AC97_PCBEEP_VOL, 0x0000);
3149         ali_ac97_set(codec, AC97_GENERAL_PURPOSE, AC97_GP_MIX);
3150         ali_ac97_set(codec, AC97_MASTER_VOL_MONO, 0x0000);
3151         ali_ac97_set(codec, 0x38, 0x0000);
3152         addr = ali_ac97_get(codec, 0x2a);
3153         ali_ac97_set(codec, 0x2a, addr | 0x0001);
3154         addr = ali_ac97_get(codec, 0x2a);
3155         addr = ali_ac97_get(codec, 0x28);
3156         ali_ac97_set(codec, 0x2c, 0xbb80);
3157         addr = ali_ac97_get(codec, 0x2c);
3158         /* power it all up */
3159         ali_ac97_set(codec, AC97_POWER_CONTROL,
3160                      ali_ac97_get(codec, AC97_POWER_CONTROL) & ~0x7f00);
3161         /* wait for analog ready */
3162         for (i = 10; i && ((ali_ac97_get(codec, AC97_POWER_CONTROL) & 0xf) != 0xf); i--) {
3163                 set_current_state(TASK_UNINTERRUPTIBLE);
3164                 schedule_timeout(HZ / 20);
3165         }
3166         /* FIXME !! */
3167         i++;
3168         return i;
3169 }
3170
3171
3172 /* I clone ali5455(2.4.7 )  not clone i810_audio(2.4.18)  */
3173
3174 static int ali_reset_5455(struct ali_card *card)
3175 {
3176         outl(0x80000003, card->iobase + ALI_SCR);
3177         outl(0x83838383, card->iobase + ALI_FIFOCR1);
3178         outl(0x83838383, card->iobase + ALI_FIFOCR2);
3179         if (controller_pcmout_share_spdif_locked > 0) {
3180                 outl((inl(card->iobase + ALI_SPDIFICS) | 0x00000001),
3181                      card->iobase + ALI_SPDIFICS);
3182                 outl(0x0408000a, card->iobase + ALI_INTERFACECR);
3183         } else {
3184                 if (codec_independent_spdif_locked > 0) {
3185                         outl((inl(card->iobase + ALI_SCR) | 0x00100000), card->iobase + ALI_SCR);       // now I select slot 7 & 8
3186                         outl(0x00200000, card->iobase + ALI_INTERFACECR);       //enable codec independent spdifout
3187                 } else
3188                         outl(0x04080002, card->iobase + ALI_INTERFACECR);
3189         }
3190
3191         outl(0x00000000, card->iobase + ALI_INTERRUPTCR);
3192         outl(0x00000000, card->iobase + ALI_INTERRUPTSR);
3193         if (controller_independent_spdif_locked > 0)
3194                 outl((inl(card->iobase + ALI_SPDIFICS) | 0x00000001),
3195                      card->iobase + ALI_SPDIFICS);
3196         return 1;
3197 }
3198
3199
3200 static int ali_ac97_random_init_stuff(struct ali_card
3201                                       *card)
3202 {
3203         u32 reg = inl(card->iobase + ALI_SCR);
3204         int i = 0;
3205         reg = inl(card->iobase + ALI_SCR);
3206         if ((reg & 2) == 0)     /* Cold required */
3207                 reg |= 2;
3208         else
3209                 reg |= 1;       /* Warm */
3210         reg &= ~0x80000000;     /* ACLink on */
3211         outl(reg, card->iobase + ALI_SCR);
3212
3213         while (i < 10) {
3214                 if ((inl(card->iobase + 0x18) & (1 << 1)) == 0)
3215                         break;
3216                 current->state = TASK_UNINTERRUPTIBLE;
3217                 schedule_timeout(HZ / 20);
3218                 i++;
3219         }
3220         if (i == 10) {
3221                 printk(KERN_ERR "ali_audio: AC'97 reset failed.\n");
3222                 return 0;
3223         }
3224
3225         set_current_state(TASK_UNINTERRUPTIBLE);
3226         schedule_timeout(HZ / 2);
3227         return 1;
3228 }
3229
3230 /* AC97 codec initialisation. */
3231
3232 static int __devinit ali_ac97_init(struct ali_card *card)
3233 {
3234         int num_ac97 = 0;
3235         int total_channels = 0;
3236         struct ac97_codec *codec;
3237         u16 eid;
3238
3239         if (!ali_ac97_random_init_stuff(card))
3240                 return 0;
3241
3242         /* Number of channels supported */
3243         /* What about the codec?  Just because the ICH supports */
3244         /* multiple channels doesn't mean the codec does.       */
3245         /* we'll have to modify this in the codec section below */
3246         /* to reflect what the codec has.                       */
3247         /* ICH and ICH0 only support 2 channels so don't bother */
3248         /* to check....                                         */
3249         inl(card->iobase + ALI_CPR);
3250         card->channels = 2;
3251
3252         for (num_ac97 = 0; num_ac97 < NR_AC97; num_ac97++) {
3253
3254                 /* Assume codec isn't available until we go through the
3255                  * gauntlet below */
3256                 card->ac97_codec[num_ac97] = NULL;
3257                 /* The ICH programmer's reference says you should   */
3258                 /* check the ready status before probing. So we chk */
3259                 /*   What do we do if it's not ready?  Wait and try */
3260                 /*   again, or abort?                               */
3261                 if (!ali_ac97_exists(card, num_ac97)) {
3262                         if (num_ac97 == 0)
3263                                 printk(KERN_ERR "ali_audio: Primary codec not ready.\n");
3264                         break;
3265                 }
3266
3267                 if ((codec = ac97_alloc_codec()) == NULL)
3268                         return -ENOMEM;
3269                 /* initialize some basic codec information, other fields will be filled
3270                    in ac97_probe_codec */
3271                 codec->private_data = card;
3272                 codec->id = num_ac97;
3273                 codec->codec_read = ali_ac97_get;
3274                 codec->codec_write = ali_ac97_set;
3275                 if (!ali_ac97_probe_and_powerup(card, codec)) {
3276                         printk(KERN_ERR "ali_audio: timed out waiting for codec %d analog ready",
3277                              num_ac97);
3278                         kfree(codec);
3279                         break;  /* it didn't work */
3280                 }
3281
3282                 /* Store state information about S/PDIF transmitter */
3283                 card->ac97_status = 0;
3284                 /* Don't attempt to get eid until powerup is complete */
3285                 eid = ali_ac97_get(codec, AC97_EXTENDED_ID);
3286                 if (eid == 0xFFFF) {
3287                         printk(KERN_ERR "ali_audio: no codec attached ?\n");
3288                         kfree(codec);
3289                         break;
3290                 }
3291
3292                 card->ac97_features = eid;
3293                 /* Now check the codec for useful features to make up for
3294                    the dumbness of the ali5455 hardware engine */
3295                 if (!(eid & 0x0001))
3296                         printk(KERN_WARNING
3297                                "ali_audio: only 48Khz playback available.\n");
3298                 else {
3299                         if (!ali_ac97_enable_variable_rate(codec)) {
3300                                 printk(KERN_WARNING
3301                                        "ali_audio: Codec refused to allow VRA, using 48Khz only.\n");
3302                                 card->ac97_features &= ~1;
3303                         }
3304                 }
3305
3306                 /* Determine how many channels the codec(s) support   */
3307                 /*   - The primary codec always supports 2            */
3308                 /*   - If the codec supports AMAP, surround DACs will */
3309                 /*     automaticlly get assigned to slots.            */
3310                 /*     * Check for surround DACs and increment if     */
3311                 /*       found.                                       */
3312                 /*   - Else check if the codec is revision 2.2        */
3313                 /*     * If surround DACs exist, assign them to slots */
3314                 /*       and increment channel count.                 */
3315
3316                 /* All of this only applies to ICH2 and above. ICH    */
3317                 /* and ICH0 only support 2 channels.  ICH2 will only  */
3318                 /* support multiple codecs in a "split audio" config. */
3319                 /* as described above.                                */
3320
3321                 /* TODO: Remove all the debugging messages!           */
3322
3323                 if ((eid & 0xc000) == 0)        /* primary codec */
3324                         total_channels += 2;
3325                 if ((codec->dev_mixer = register_sound_mixer(&ali_mixer_fops, -1)) < 0) {
3326                         printk(KERN_ERR "ali_audio: couldn't register mixer!\n");
3327                         kfree(codec);
3328                         break;
3329                 }
3330                 card->ac97_codec[num_ac97] = codec;
3331         }
3332         /* pick the minimum of channels supported by ICHx or codec(s) */
3333         card->channels = (card->channels > total_channels) ? total_channels : card->channels;
3334         return num_ac97;
3335 }
3336
3337 static void __devinit ali_configure_clocking(void)
3338 {
3339         struct ali_card *card;
3340         struct ali_state *state;
3341         struct dmabuf *dmabuf;
3342         unsigned int i, offset, new_offset;
3343         unsigned long flags;
3344         card = devs;
3345
3346         /* We could try to set the clocking for multiple cards, but can you even have
3347          * more than one ali in a machine?  Besides, clocking is global, so unless
3348          * someone actually thinks more than one ali in a machine is possible and
3349          * decides to rewrite that little bit, setting the rate for more than one card
3350          * is a waste of time.
3351          */
3352         if (card != NULL) {
3353                 state = card->states[0] = (struct ali_state *)
3354                     kmalloc(sizeof(struct ali_state), GFP_KERNEL);
3355                 if (state == NULL)
3356                         return;
3357                 memset(state, 0, sizeof(struct ali_state));
3358                 dmabuf = &state->dmabuf;
3359                 dmabuf->write_channel = card->alloc_pcm_channel(card);
3360                 state->virt = 0;
3361                 state->card = card;
3362                 state->magic = ALI5455_STATE_MAGIC;
3363                 init_waitqueue_head(&dmabuf->wait);
3364                 mutex_init(&state->open_mutex);
3365                 dmabuf->fmt = ALI5455_FMT_STEREO | ALI5455_FMT_16BIT;
3366                 dmabuf->trigger = PCM_ENABLE_OUTPUT;
3367                 ali_set_dac_rate(state, 48000);
3368                 if (prog_dmabuf(state, 0) != 0)
3369                         goto config_out_nodmabuf;
3370
3371                 if (dmabuf->dmasize < 16384)
3372                         goto config_out;
3373
3374                 dmabuf->count = dmabuf->dmasize;
3375                 outb(31, card->iobase + dmabuf->write_channel->port + OFF_LVI);
3376
3377                 local_irq_save(flags);
3378                 start_dac(state);
3379                 offset = ali_get_dma_addr(state, 0);
3380                 mdelay(50);
3381                 new_offset = ali_get_dma_addr(state, 0);
3382                 stop_dac(state);
3383
3384                 outb(2, card->iobase + dmabuf->write_channel->port + OFF_CR);
3385                 local_irq_restore(flags);
3386
3387                 i = new_offset - offset;
3388
3389                 if (i == 0)
3390                         goto config_out;
3391                 i = i / 4 * 20;
3392                 if (i > 48500 || i < 47500) {
3393                         clocking = clocking * clocking / i;
3394                 }
3395 config_out:
3396                 dealloc_dmabuf(state);
3397 config_out_nodmabuf:
3398                 state->card->free_pcm_channel(state->card, state->dmabuf. write_channel->num);
3399                 kfree(state);
3400                 card->states[0] = NULL;
3401         }
3402 }
3403
3404 /* install the driver, we do not allocate hardware channel nor DMA buffer now, they are defered
3405    until "ACCESS" time (in prog_dmabuf called by open/read/write/ioctl/mmap) */
3406
3407 static int __devinit ali_probe(struct pci_dev *pci_dev,
3408                                const struct pci_device_id *pci_id)
3409 {
3410         struct ali_card *card;
3411         if (pci_enable_device(pci_dev))
3412                 return -EIO;
3413         if (pci_set_dma_mask(pci_dev, ALI5455_DMA_MASK)) {
3414                 printk(KERN_ERR "ali5455: architecture does not support"
3415                        " 32bit PCI busmaster DMA\n");
3416                 return -ENODEV;
3417         }
3418
3419         if ((card = kmalloc(sizeof(struct ali_card), GFP_KERNEL)) == NULL) {
3420                 printk(KERN_ERR "ali_audio: out of memory\n");
3421                 return -ENOMEM;
3422         }
3423         memset(card, 0, sizeof(*card));
3424         card->initializing = 1;
3425         card->iobase = pci_resource_start(pci_dev, 0);
3426         card->pci_dev = pci_dev;
3427         card->pci_id = pci_id->device;
3428         card->irq = pci_dev->irq;
3429         card->next = devs;
3430         card->magic = ALI5455_CARD_MAGIC;
3431 #ifdef CONFIG_PM
3432         card->pm_suspended = 0;
3433 #endif
3434         spin_lock_init(&card->lock);
3435         spin_lock_init(&card->ac97_lock);
3436         devs = card;
3437         pci_set_master(pci_dev);
3438         printk(KERN_INFO "ali: %s found at IO 0x%04lx, IRQ %d\n",
3439                card_names[pci_id->driver_data], card->iobase, card->irq);
3440         card->alloc_pcm_channel = ali_alloc_pcm_channel;
3441         card->alloc_rec_pcm_channel = ali_alloc_rec_pcm_channel;
3442         card->alloc_rec_mic_channel = ali_alloc_rec_mic_channel;
3443         card->alloc_codec_spdifout_channel = ali_alloc_codec_spdifout_channel;
3444         card->alloc_controller_spdifout_channel = ali_alloc_controller_spdifout_channel;
3445         card->free_pcm_channel = ali_free_pcm_channel;
3446         card->channel[0].offset = 0;
3447         card->channel[0].port = 0x40;
3448         card->channel[0].num = 0;
3449         card->channel[1].offset = 0;
3450         card->channel[1].port = 0x50;
3451         card->channel[1].num = 1;
3452         card->channel[2].offset = 0;
3453         card->channel[2].port = 0x60;
3454         card->channel[2].num = 2;
3455         card->channel[3].offset = 0;
3456         card->channel[3].port = 0x70;
3457         card->channel[3].num = 3;
3458         card->channel[4].offset = 0;
3459         card->channel[4].port = 0xb0;
3460         card->channel[4].num = 4;
3461         /* claim our iospace and irq */
3462         request_region(card->iobase, 256, card_names[pci_id->driver_data]);
3463         if (request_irq(card->irq, &ali_interrupt, IRQF_SHARED,
3464                         card_names[pci_id->driver_data], card)) {
3465                 printk(KERN_ERR "ali_audio: unable to allocate irq %d\n",
3466                        card->irq);
3467                 release_region(card->iobase, 256);
3468                 kfree(card);
3469                 return -ENODEV;
3470         }
3471
3472         if (ali_reset_5455(card) <= 0) {
3473                 unregister_sound_dsp(card->dev_audio);
3474                 release_region(card->iobase, 256);
3475                 free_irq(card->irq, card);
3476                 kfree(card);
3477                 return -ENODEV;
3478         }
3479
3480         /* initialize AC97 codec and register /dev/mixer */
3481         if (ali_ac97_init(card) < 0) {
3482                 release_region(card->iobase, 256);
3483                 free_irq(card->irq, card);
3484                 kfree(card);
3485                 return -ENODEV;
3486         }
3487
3488         pci_set_drvdata(pci_dev, card);
3489
3490         if (clocking == 0) {
3491                 clocking = 48000;
3492                 ali_configure_clocking();
3493         }
3494
3495         /* register /dev/dsp */
3496         if ((card->dev_audio = register_sound_dsp(&ali_audio_fops, -1)) < 0) {
3497                 int i;
3498                 printk(KERN_ERR"ali_audio: couldn't register DSP device!\n");
3499                 release_region(card->iobase, 256);
3500                 free_irq(card->irq, card);
3501                 for (i = 0; i < NR_AC97; i++)
3502                         if (card->ac97_codec[i] != NULL) {
3503                                 unregister_sound_mixer(card->ac97_codec[i]->dev_mixer);
3504                                 kfree(card->ac97_codec[i]);
3505                         }
3506                 kfree(card);
3507                 return -ENODEV;
3508         }
3509         card->initializing = 0;
3510         return 0;
3511 }
3512
3513 static void __devexit ali_remove(struct pci_dev *pci_dev)
3514 {
3515         int i;
3516         struct ali_card *card = pci_get_drvdata(pci_dev);
3517         /* free hardware resources */
3518         free_irq(card->irq, devs);
3519         release_region(card->iobase, 256);
3520         /* unregister audio devices */
3521         for (i = 0; i < NR_AC97; i++)
3522                 if (card->ac97_codec[i] != NULL) {
3523                         unregister_sound_mixer(card->ac97_codec[i]->
3524                                                dev_mixer);
3525                         ac97_release_codec(card->ac97_codec[i]);
3526                         card->ac97_codec[i] = NULL;
3527                 }
3528         unregister_sound_dsp(card->dev_audio);
3529         kfree(card);
3530 }
3531
3532 #ifdef CONFIG_PM
3533 static int ali_pm_suspend(struct pci_dev *dev, pm_message_t pm_state)
3534 {
3535         struct ali_card *card = pci_get_drvdata(dev);
3536         struct ali_state *state;
3537         unsigned long flags;
3538         struct dmabuf *dmabuf;
3539         int i, num_ac97;
3540
3541         if (!card)
3542                 return 0;
3543         spin_lock_irqsave(&card->lock, flags);
3544         card->pm_suspended = 1;
3545         for (i = 0; i < NR_HW_CH; i++) {
3546                 state = card->states[i];
3547                 if (!state)
3548                         continue;
3549                 /* this happens only if there are open files */
3550                 dmabuf = &state->dmabuf;
3551                 if (dmabuf->enable & DAC_RUNNING ||
3552                     (dmabuf->count
3553                      && (dmabuf->trigger & PCM_ENABLE_OUTPUT))) {
3554                         state->pm_saved_dac_rate = dmabuf->rate;
3555                         stop_dac(state);
3556                 } else {
3557                         state->pm_saved_dac_rate = 0;
3558                 }
3559                 if (dmabuf->enable & ADC_RUNNING) {
3560                         state->pm_saved_adc_rate = dmabuf->rate;
3561                         stop_adc(state);
3562                 } else {
3563                         state->pm_saved_adc_rate = 0;
3564                 }
3565                 dmabuf->ready = 0;
3566                 dmabuf->swptr = dmabuf->hwptr = 0;
3567                 dmabuf->count = dmabuf->total_bytes = 0;
3568         }
3569
3570         spin_unlock_irqrestore(&card->lock, flags);
3571         /* save mixer settings */
3572         for (num_ac97 = 0; num_ac97 < NR_AC97; num_ac97++) {
3573                 struct ac97_codec *codec = card->ac97_codec[num_ac97];
3574                 if (!codec)
3575                         continue;
3576                 for (i = 0; i < SOUND_MIXER_NRDEVICES; i++) {
3577                         if ((supported_mixer(codec, i)) && (codec->read_mixer)) {
3578                                 card->pm_saved_mixer_settings[i][num_ac97] = codec->read_mixer(codec, i);
3579                         }
3580                 }
3581         }
3582         pci_save_state(dev);    /* XXX do we need this? */
3583         pci_disable_device(dev);        /* disable busmastering */
3584         pci_set_power_state(dev, 3);    /* Zzz. */
3585         return 0;
3586 }
3587
3588
3589 static int ali_pm_resume(struct pci_dev *dev)
3590 {
3591         int num_ac97, i = 0;
3592         struct ali_card *card = pci_get_drvdata(dev);
3593         pci_enable_device(dev);
3594         pci_restore_state(dev);
3595         /* observation of a toshiba portege 3440ct suggests that the
3596            hardware has to be more or less completely reinitialized from
3597            scratch after an apm suspend.  Works For Me.   -dan */
3598         ali_ac97_random_init_stuff(card);
3599         for (num_ac97 = 0; num_ac97 < NR_AC97; num_ac97++) {
3600                 struct ac97_codec *codec = card->ac97_codec[num_ac97];
3601                 /* check they haven't stolen the hardware while we were
3602                    away */
3603                 if (!codec || !ali_ac97_exists(card, num_ac97)) {
3604                         if (num_ac97)
3605                                 continue;
3606                         else
3607                                 BUG();
3608                 }
3609                 if (!ali_ac97_probe_and_powerup(card, codec))
3610                         BUG();
3611                 if ((card->ac97_features & 0x0001)) {
3612                         /* at probe time we found we could do variable
3613                            rates, but APM suspend has made it forget
3614                            its magical powers */
3615                         if (!ali_ac97_enable_variable_rate(codec))
3616                                 BUG();
3617                 }
3618                 /* we lost our mixer settings, so restore them */
3619                 for (i = 0; i < SOUND_MIXER_NRDEVICES; i++) {
3620                         if (supported_mixer(codec, i)) {
3621                                 int val = card->pm_saved_mixer_settings[i][num_ac97];
3622                                 codec->mixer_state[i] = val;
3623                                 codec->write_mixer(codec, i,
3624                                                    (val & 0xff),
3625                                                    ((val >> 8) & 0xff));
3626                         }
3627                 }
3628         }
3629
3630         /* we need to restore the sample rate from whatever it was */
3631         for (i = 0; i < NR_HW_CH; i++) {
3632                 struct ali_state *state = card->states[i];
3633                 if (state) {
3634                         if (state->pm_saved_adc_rate)
3635                                 ali_set_adc_rate(state, state->pm_saved_adc_rate);
3636                         if (state->pm_saved_dac_rate)
3637                                 ali_set_dac_rate(state, state->pm_saved_dac_rate);
3638                 }
3639         }
3640
3641         card->pm_suspended = 0;
3642         /* any processes that were reading/writing during the suspend
3643            probably ended up here */
3644         for (i = 0; i < NR_HW_CH; i++) {
3645                 struct ali_state *state = card->states[i];
3646                 if (state)
3647                         wake_up(&state->dmabuf.wait);
3648         }
3649         return 0;
3650 }
3651 #endif                          /* CONFIG_PM */
3652
3653 MODULE_AUTHOR("");
3654 MODULE_DESCRIPTION("ALI 5455 audio support");
3655 MODULE_LICENSE("GPL");
3656 module_param(clocking, int, 0);
3657 /* FIXME: bool? */
3658 module_param(strict_clocking, uint, 0);
3659 module_param(codec_pcmout_share_spdif_locked, uint, 0);
3660 module_param(codec_independent_spdif_locked, uint, 0);
3661 module_param(controller_pcmout_share_spdif_locked, uint, 0);
3662 module_param(controller_independent_spdif_locked, uint, 0);
3663 #define ALI5455_MODULE_NAME "ali5455"
3664 static struct pci_driver ali_pci_driver = {
3665         .name           = ALI5455_MODULE_NAME,
3666         .id_table       = ali_pci_tbl,
3667         .probe          = ali_probe,
3668         .remove         = __devexit_p(ali_remove),
3669 #ifdef CONFIG_PM
3670         .suspend        = ali_pm_suspend,
3671         .resume         = ali_pm_resume,
3672 #endif                          /* CONFIG_PM */
3673 };
3674
3675 static int __init ali_init_module(void)
3676 {
3677         printk(KERN_INFO "ALI 5455 + AC97 Audio, version "
3678                DRIVER_VERSION ", " __TIME__ " " __DATE__ "\n");
3679
3680         if (codec_independent_spdif_locked > 0) {
3681                 if (codec_independent_spdif_locked == 32000
3682                     || codec_independent_spdif_locked == 44100
3683                     || codec_independent_spdif_locked == 48000) {
3684                         printk(KERN_INFO "ali_audio: Enabling S/PDIF at sample rate %dHz.\n", codec_independent_spdif_locked);
3685                 } else {
3686                         printk(KERN_INFO "ali_audio: S/PDIF can only be locked to 32000, 44100, or 48000Hz.\n");
3687                         codec_independent_spdif_locked = 0;
3688                 }
3689         }
3690         if (controller_independent_spdif_locked > 0) {
3691                 if (controller_independent_spdif_locked == 32000
3692                     || controller_independent_spdif_locked == 44100
3693                     || controller_independent_spdif_locked == 48000) {
3694                         printk(KERN_INFO "ali_audio: Enabling S/PDIF at sample rate %dHz.\n", controller_independent_spdif_locked);
3695                 } else {
3696                         printk(KERN_INFO "ali_audio: S/PDIF can only be locked to 32000, 44100, or 48000Hz.\n");
3697                         controller_independent_spdif_locked = 0;
3698                 }
3699         }
3700
3701         if (codec_pcmout_share_spdif_locked > 0) {
3702                 if (codec_pcmout_share_spdif_locked == 32000
3703                     || codec_pcmout_share_spdif_locked == 44100
3704                     || codec_pcmout_share_spdif_locked == 48000) {
3705                         printk(KERN_INFO "ali_audio: Enabling S/PDIF at sample rate %dHz.\n", codec_pcmout_share_spdif_locked);
3706                 } else {
3707                         printk(KERN_INFO "ali_audio: S/PDIF can only be locked to 32000, 44100, or 48000Hz.\n");
3708                         codec_pcmout_share_spdif_locked = 0;
3709                 }
3710         }
3711         if (controller_pcmout_share_spdif_locked > 0) {
3712                 if (controller_pcmout_share_spdif_locked == 32000
3713                     || controller_pcmout_share_spdif_locked == 44100
3714                     || controller_pcmout_share_spdif_locked == 48000) {
3715                         printk(KERN_INFO "ali_audio: Enabling controller S/PDIF at sample rate %dHz.\n", controller_pcmout_share_spdif_locked);
3716                 } else {
3717                         printk(KERN_INFO "ali_audio: S/PDIF can only be locked to 32000, 44100, or 48000Hz.\n");
3718                         controller_pcmout_share_spdif_locked = 0;
3719                 }
3720         }
3721         return pci_register_driver(&ali_pci_driver);
3722 }
3723
3724 static void __exit ali_cleanup_module(void)
3725 {
3726         pci_unregister_driver(&ali_pci_driver);
3727 }
3728
3729 module_init(ali_init_module);
3730 module_exit(ali_cleanup_module);
3731 /*
3732 Local Variables:
3733 c-basic-offset: 8
3734 End:
3735 */