sound/oss/i810_audio.c

   1 /*
   2  *      Intel i810 and friends ICH driver for Linux
   3  *      Alan Cox <alan@redhat.com>
   4  *
   5  *  Built from:
   6  *      Low level code:  Zach Brown (original nonworking i810 OSS driver)
   7  *                       Jaroslav Kysela <perex@suse.cz> (working ALSA driver)
   8  *
   9  *      Framework: Thomas Sailer <sailer@ife.ee.ethz.ch>
  10  *      Extended by: Zach Brown <zab@redhat.com>
  11  *                      and others..
  12  *
  13  *  Hardware Provided By:
  14  *      Analog Devices (A major AC97 codec maker)
  15  *      Intel Corp  (you've probably heard of them already)
  16  *
  17  *  AC97 clues and assistance provided by
  18  *      Analog Devices
  19  *      Zach 'Fufu' Brown
  20  *      Jeff Garzik
  21  *
  22  *      This program is free software; you can redistribute it and/or modify
  23  *      it under the terms of the GNU General Public License as published by
  24  *      the Free Software Foundation; either version 2 of the License, or
  25  *      (at your option) any later version.
  26  *
  27  *      This program is distributed in the hope that it will be useful,
  28  *      but WITHOUT ANY WARRANTY; without even the implied warranty of
  29  *      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  30  *      GNU General Public License for more details.
  31  *
  32  *      You should have received a copy of the GNU General Public License
  33  *      along with this program; if not, write to the Free Software
  34  *      Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  35  *
  36  *
  37  *      Intel 810 theory of operation
  38  *
  39  *      The chipset provides three DMA channels that talk to an AC97
  40  *      CODEC (AC97 is a digital/analog mixer standard). At its simplest
  41  *      you get 48Khz audio with basic volume and mixer controls. At the
  42  *      best you get rate adaption in the codec. We set the card up so
  43  *      that we never take completion interrupts but instead keep the card
  44  *      chasing its tail around a ring buffer. This is needed for mmap
  45  *      mode audio and happens to work rather well for non-mmap modes too.
  46  *
  47  *      The board has one output channel for PCM audio (supported) and
  48  *      a stereo line in and mono microphone input. Again these are normally
  49  *      locked to 48Khz only. Right now recording is not finished.
  50  *
  51  *      There is no midi support, no synth support. Use timidity. To get
  52  *      esd working you need to use esd -r 48000 as it won't probe 48KHz
  53  *      by default. mpg123 can't handle 48Khz only audio so use xmms.
  54  *
  55  *      Fix The Sound On Dell
  56  *
  57  *      Not everyone uses 48KHz. We know of no way to detect this reliably
  58  *      and certainly not to get the right data. If your i810 audio sounds
  59  *      stupid you may need to investigate other speeds. According to Analog
  60  *      they tend to use a 14.318MHz clock which gives you a base rate of
  61  *      41194Hz.
  62  *
  63  *      This is available via the 'ftsodell=1' option.
  64  *
  65  *      If you need to force a specific rate set the clocking= option
  66  *
  67  *      This driver is cursed. (Ben LaHaise)
  68  *
  69  *  ICH 3 caveats
  70  *      Intel errata #7 for ICH3 IO. We need to disable SMI stuff
  71  *      when codec probing. [Not Yet Done]
  72  *
  73  *  ICH 4 caveats
  74  *
  75  *      The ICH4 has the feature, that the codec ID doesn't have to be
  76  *      congruent with the IO connection.
  77  *
  78  *      Therefore, from driver version 0.23 on, there is a "codec ID" <->
  79  *      "IO register base offset" mapping (card->ac97_id_map) field.
  80  *
  81  *      Juergen "George" Sawinski (jsaw)
  82  */
  83
  84 #include <linux/module.h>
  85 #include <linux/string.h>
  86 #include <linux/ctype.h>
  87 #include <linux/ioport.h>
  88 #include <linux/sched.h>
  89 #include <linux/delay.h>
  90 #include <linux/sound.h>
  91 #include <linux/slab.h>
  92 #include <linux/soundcard.h>
  93 #include <linux/pci.h>
  94 #include <linux/interrupt.h>
  95 #include <asm/io.h>
  96 #include <asm/dma.h>
  97 #include <linux/init.h>
  98 #include <linux/poll.h>
  99 #include <linux/spinlock.h>
 100 #include <linux/smp_lock.h>
 101 #include <linux/ac97_codec.h>
 102 #include <linux/bitops.h>
 103 #include <asm/uaccess.h>
 104
 105 #define DRIVER_VERSION "1.01"
 106
 107 #define MODULOP2(a, b) ((a) & ((b) - 1))
 108 #define MASKP2(a, b) ((a) & ~((b) - 1))
 109
 110 static int ftsodell;
 111 static int strict_clocking;
 112 static unsigned int clocking;
 113 static int spdif_locked;
 114 static int ac97_quirk = AC97_TUNE_DEFAULT;
 115
 116 //#define DEBUG
 117 //#define DEBUG2
 118 //#define DEBUG_INTERRUPTS
 119 //#define DEBUG_MMAP
 120 //#define DEBUG_MMIO
 121
 122 #define ADC_RUNNING     1
 123 #define DAC_RUNNING     2
 124
 125 #define I810_FMT_16BIT  1
 126 #define I810_FMT_STEREO 2
 127 #define I810_FMT_MASK   3
 128
 129 #define SPDIF_ON        0x0004
 130 #define SURR_ON         0x0010
 131 #define CENTER_LFE_ON   0x0020
 132 #define VOL_MUTED       0x8000
 133
 134 /* the 810's array of pointers to data buffers */
 135
 136 struct sg_item {
 137 #define BUSADDR_MASK    0xFFFFFFFE
 138         u32 busaddr;
 139 #define CON_IOC         0x80000000 /* interrupt on completion */
 140 #define CON_BUFPAD      0x40000000 /* pad underrun with last sample, else 0 */
 141 #define CON_BUFLEN_MASK 0x0000ffff /* buffer length in samples */
 142         u32 control;
 143 };
 144
 145 /* an instance of the i810 channel */
 146 #define SG_LEN 32
 147 struct i810_channel
 148 {
 149         /* these sg guys should probably be allocated
 150            separately as nocache. Must be 8 byte aligned */
 151         struct sg_item sg[SG_LEN];      /* 32*8 */
 152         u32 offset;                     /* 4 */
 153         u32 port;                       /* 4 */
 154         u32 used;
 155         u32 num;
 156 };
 157
 158 /*
 159  * we have 3 separate dma engines.  pcm in, pcm out, and mic.
 160  * each dma engine has controlling registers.  These goofy
 161  * names are from the datasheet, but make it easy to write
 162  * code while leafing through it.
 163  *
 164  * ICH4 has 6 dma engines, pcm in, pcm out, mic, pcm in 2,
 165  * mic in 2, s/pdif.   Of special interest is the fact that
 166  * the upper 3 DMA engines on the ICH4 *must* be accessed
 167  * via mmio access instead of pio access.
 168  */
 169
 170 #define ENUM_ENGINE(PRE,DIG)                                                                    \
 171 enum {                                                                                          \
 172         PRE##_BASE =    0x##DIG##0,             /* Base Address */                              \
 173         PRE##_BDBAR =   0x##DIG##0,             /* Buffer Descriptor list Base Address */       \
 174         PRE##_CIV =     0x##DIG##4,             /* Current Index Value */                       \
 175         PRE##_LVI =     0x##DIG##5,             /* Last Valid Index */                          \
 176         PRE##_SR =      0x##DIG##6,             /* Status Register */                           \
 177         PRE##_PICB =    0x##DIG##8,             /* Position In Current Buffer */                \
 178         PRE##_PIV =     0x##DIG##a,             /* Prefetched Index Value */                    \
 179         PRE##_CR =      0x##DIG##b              /* Control Register */                          \
 180 }
 181
 182 ENUM_ENGINE(OFF,0);     /* Offsets */
 183 ENUM_ENGINE(PI,0);      /* PCM In */
 184 ENUM_ENGINE(PO,1);      /* PCM Out */
 185 ENUM_ENGINE(MC,2);      /* Mic In */
 186
 187 enum {
 188         GLOB_CNT =      0x2c,                   /* Global Control */
 189         GLOB_STA =      0x30,                   /* Global Status */
 190         CAS      =      0x34                    /* Codec Write Semaphore Register */
 191 };
 192
 193 ENUM_ENGINE(MC2,4);     /* Mic In 2 */
 194 ENUM_ENGINE(PI2,5);     /* PCM In 2 */
 195 ENUM_ENGINE(SP,6);      /* S/PDIF */
 196
 197 enum {
 198         SDM =           0x80                    /* SDATA_IN Map Register */
 199 };
 200
 201 /* interrupts for a dma engine */
 202 #define DMA_INT_FIFO            (1<<4)  /* fifo under/over flow */
 203 #define DMA_INT_COMPLETE        (1<<3)  /* buffer read/write complete and ioc set */
 204 #define DMA_INT_LVI             (1<<2)  /* last valid done */
 205 #define DMA_INT_CELV            (1<<1)  /* last valid is current */
 206 #define DMA_INT_DCH             (1)     /* DMA Controller Halted (happens on LVI interrupts) */
 207 #define DMA_INT_MASK (DMA_INT_FIFO|DMA_INT_COMPLETE|DMA_INT_LVI)
 208
 209 /* interrupts for the whole chip */
 210 #define INT_SEC         (1<<11)
 211 #define INT_PRI         (1<<10)
 212 #define INT_MC          (1<<7)
 213 #define INT_PO          (1<<6)
 214 #define INT_PI          (1<<5)
 215 #define INT_MO          (1<<2)
 216 #define INT_NI          (1<<1)
 217 #define INT_GPI         (1<<0)
 218 #define INT_MASK (INT_SEC|INT_PRI|INT_MC|INT_PO|INT_PI|INT_MO|INT_NI|INT_GPI)
 219
 220 /* magic numbers to protect our data structures */
 221 #define I810_CARD_MAGIC         0x5072696E /* "Prin" */
 222 #define I810_STATE_MAGIC        0x63657373 /* "cess" */
 223 #define I810_DMA_MASK           0xffffffff /* DMA buffer mask for pci_alloc_consist */
 224 #define NR_HW_CH                3
 225
 226 /* maxinum number of AC97 codecs connected, AC97 2.0 defined 4 */
 227 #define NR_AC97                 4
 228
 229 /* Please note that an 8bit mono stream is not valid on this card, you must have a 16bit */
 230 /* stream at a minimum for this card to be happy */
 231 static const unsigned sample_size[] = { 1, 2, 2, 4 };
 232 /* Samples are 16bit values, so we are shifting to a word, not to a byte, hence shift */
 233 /* values are one less than might be expected */
 234 static const unsigned sample_shift[] = { -1, 0, 0, 1 };
 235
 236 enum {
 237         ICH82801AA = 0,
 238         ICH82901AB,
 239         INTEL440MX,
 240         INTELICH2,
 241         INTELICH3,
 242         INTELICH4,
 243         INTELICH5,
 244         SI7012,
 245         NVIDIA_NFORCE,
 246         AMD768,
 247         AMD8111
 248 };
 249
 250 static char * card_names[] = {
 251         "Intel ICH 82801AA",
 252         "Intel ICH 82901AB",
 253         "Intel 440MX",
 254         "Intel ICH2",
 255         "Intel ICH3",
 256         "Intel ICH4",
 257         "Intel ICH5",
 258         "SiS 7012",
 259         "NVIDIA nForce Audio",
 260         "AMD 768",
 261         "AMD-8111 IOHub"
 262 };
 263
 264 /* These are capabilities (and bugs) the chipsets _can_ have */
 265 static struct {
 266         int16_t      nr_ac97;
 267 #define CAP_MMIO                 0x0001
 268 #define CAP_20BIT_AUDIO_SUPPORT  0x0002
 269         u_int16_t flags;
 270 } card_cap[] = {
 271         {  1, 0x0000 }, /* ICH82801AA */
 272         {  1, 0x0000 }, /* ICH82901AB */
 273         {  1, 0x0000 }, /* INTEL440MX */
 274         {  1, 0x0000 }, /* INTELICH2 */
 275         {  2, 0x0000 }, /* INTELICH3 */
 276         {  3, 0x0003 }, /* INTELICH4 */
 277         {  3, 0x0003 }, /* INTELICH5 */
 278         /*@FIXME to be verified*/       {  2, 0x0000 }, /* SI7012 */
 279         /*@FIXME to be verified*/       {  2, 0x0000 }, /* NVIDIA_NFORCE */
 280         /*@FIXME to be verified*/       {  2, 0x0000 }, /* AMD768 */
 281         /*@FIXME to be verified*/       {  3, 0x0001 }, /* AMD8111 */
 282 };
 283
 284 static struct pci_device_id i810_pci_tbl [] = {
 285         {PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801AA_5,
 286          PCI_ANY_ID, PCI_ANY_ID, 0, 0, ICH82801AA},
 287         {PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801AB_5,
 288          PCI_ANY_ID, PCI_ANY_ID, 0, 0, ICH82901AB},
 289         {PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_440MX,
 290          PCI_ANY_ID, PCI_ANY_ID, 0, 0, INTEL440MX},
 291         {PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801BA_4,
 292          PCI_ANY_ID, PCI_ANY_ID, 0, 0, INTELICH2},
 293         {PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801CA_5,
 294          PCI_ANY_ID, PCI_ANY_ID, 0, 0, INTELICH3},
 295         {PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801DB_5,
 296          PCI_ANY_ID, PCI_ANY_ID, 0, 0, INTELICH4},
 297         {PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801EB_5,
 298          PCI_ANY_ID, PCI_ANY_ID, 0, 0, INTELICH5},
 299         {PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_7012,
 300          PCI_ANY_ID, PCI_ANY_ID, 0, 0, SI7012},
 301         {PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_MCP1_AUDIO,
 302          PCI_ANY_ID, PCI_ANY_ID, 0, 0, NVIDIA_NFORCE},
 303         {PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_MCP2_AUDIO,
 304          PCI_ANY_ID, PCI_ANY_ID, 0, 0, NVIDIA_NFORCE},
 305         {PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_MCP3_AUDIO,
 306          PCI_ANY_ID, PCI_ANY_ID, 0, 0, NVIDIA_NFORCE},
 307         {PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_OPUS_7445,
 308          PCI_ANY_ID, PCI_ANY_ID, 0, 0, AMD768},
 309         {PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_8111_AUDIO,
 310          PCI_ANY_ID, PCI_ANY_ID, 0, 0, AMD8111},
 311         {PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ESB_5,
 312          PCI_ANY_ID, PCI_ANY_ID, 0, 0, INTELICH4},
 313         {PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH6_18,
 314          PCI_ANY_ID, PCI_ANY_ID, 0, 0, INTELICH4},
 315         {PCI_VENDOR_ID_NVIDIA,  PCI_DEVICE_ID_NVIDIA_CK804_AUDIO,
 316          PCI_ANY_ID, PCI_ANY_ID, 0, 0, NVIDIA_NFORCE},
 317         {0,}
 318 };
 319
 320 MODULE_DEVICE_TABLE (pci, i810_pci_tbl);
 321
 322 #ifdef CONFIG_PM
 323 #define PM_SUSPENDED(card) (card->pm_suspended)
 324 #else
 325 #define PM_SUSPENDED(card) (0)
 326 #endif
 327
 328 /* "software" or virtual channel, an instance of opened /dev/dsp */
 329 struct i810_state {
 330         unsigned int magic;
 331         struct i810_card *card; /* Card info */
 332
 333         /* single open lock mechanism, only used for recording */
 334         struct semaphore open_sem;
 335         wait_queue_head_t open_wait;
 336
 337         /* file mode */
 338         mode_t open_mode;
 339
 340         /* virtual channel number */
 341         int virt;
 342
 343 #ifdef CONFIG_PM
 344         unsigned int pm_saved_dac_rate,pm_saved_adc_rate;
 345 #endif
 346         struct dmabuf {
 347                 /* wave sample stuff */
 348                 unsigned int rate;
 349                 unsigned char fmt, enable, trigger;
 350
 351                 /* hardware channel */
 352                 struct i810_channel *read_channel;
 353                 struct i810_channel *write_channel;
 354
 355                 /* OSS buffer management stuff */
 356                 void *rawbuf;
 357                 dma_addr_t dma_handle;
 358                 unsigned buforder;
 359                 unsigned numfrag;
 360                 unsigned fragshift;
 361
 362                 /* our buffer acts like a circular ring */
 363                 unsigned hwptr;         /* where dma last started, updated by update_ptr */
 364                 unsigned swptr;         /* where driver last clear/filled, updated by read/write */
 365                 int count;              /* bytes to be consumed or been generated by dma machine */
 366                 unsigned total_bytes;   /* total bytes dmaed by hardware */
 367
 368                 unsigned error;         /* number of over/underruns */
 369                 wait_queue_head_t wait; /* put process on wait queue when no more space in buffer */
 370
 371                 /* redundant, but makes calculations easier */
 372                 /* what the hardware uses */
 373                 unsigned dmasize;
 374                 unsigned fragsize;
 375                 unsigned fragsamples;
 376
 377                 /* what we tell the user to expect */
 378                 unsigned userfrags;
 379                 unsigned userfragsize;
 380
 381                 /* OSS stuff */
 382                 unsigned mapped:1;
 383                 unsigned ready:1;
 384                 unsigned update_flag;
 385                 unsigned ossfragsize;
 386                 unsigned ossmaxfrags;
 387                 unsigned subdivision;
 388         } dmabuf;
 389 };
 390
 391
 392 struct i810_card {
 393         unsigned int magic;
 394
 395         /* We keep i810 cards in a linked list */
 396         struct i810_card *next;
 397
 398         /* The i810 has a certain amount of cross channel interaction
 399            so we use a single per card lock */
 400         spinlock_t lock;
 401
 402         /* Control AC97 access serialization */
 403         spinlock_t ac97_lock;
 404
 405         /* PCI device stuff */
 406         struct pci_dev * pci_dev;
 407         u16 pci_id;
 408         u16 pci_id_internal; /* used to access card_cap[] */
 409 #ifdef CONFIG_PM
 410         u16 pm_suspended;
 411         int pm_saved_mixer_settings[SOUND_MIXER_NRDEVICES][NR_AC97];
 412 #endif
 413         /* soundcore stuff */
 414         int dev_audio;
 415
 416         /* structures for abstraction of hardware facilities, codecs, banks and channels*/
 417         u16    ac97_id_map[NR_AC97];
 418         struct ac97_codec *ac97_codec[NR_AC97];
 419         struct i810_state *states[NR_HW_CH];
 420         struct i810_channel *channel;   /* 1:1 to states[] but diff. lifetime */
 421         dma_addr_t chandma;
 422
 423         u16 ac97_features;
 424         u16 ac97_status;
 425         u16 channels;
 426
 427         /* hardware resources */
 428         unsigned long ac97base;
 429         unsigned long iobase;
 430         u32 irq;
 431
 432         unsigned long ac97base_mmio_phys;
 433         unsigned long iobase_mmio_phys;
 434         u_int8_t __iomem *ac97base_mmio;
 435         u_int8_t __iomem *iobase_mmio;
 436
 437         int           use_mmio;
 438
 439         /* Function support */
 440         struct i810_channel *(*alloc_pcm_channel)(struct i810_card *);
 441         struct i810_channel *(*alloc_rec_pcm_channel)(struct i810_card *);
 442         struct i810_channel *(*alloc_rec_mic_channel)(struct i810_card *);
 443         void (*free_pcm_channel)(struct i810_card *, int chan);
 444
 445         /* We have a *very* long init time possibly, so use this to block */
 446         /* attempts to open our devices before we are ready (stops oops'es) */
 447         int initializing;
 448 };
 449
 450 /* extract register offset from codec struct */
 451 #define IO_REG_OFF(codec) (((struct i810_card *) codec->private_data)->ac97_id_map[codec->id])
 452
 453 #define I810_IOREAD(size, type, card, off)                              \
 454 ({                                                                      \
 455         type val;                                                       \
 456         if (card->use_mmio)                                             \
 457                 val=read##size(card->iobase_mmio+off);                  \
 458         else                                                            \
 459                 val=in##size(card->iobase+off);                         \
 460         val;                                                            \
 461 })
 462
 463 #define I810_IOREADL(card, off)         I810_IOREAD(l, u32, card, off)
 464 #define I810_IOREADW(card, off)         I810_IOREAD(w, u16, card, off)
 465 #define I810_IOREADB(card, off)         I810_IOREAD(b, u8,  card, off)
 466
 467 #define I810_IOWRITE(size, val, card, off)                              \
 468 ({                                                                      \
 469         if (card->use_mmio)                                             \
 470                 write##size(val, card->iobase_mmio+off);                \
 471         else                                                            \
 472                 out##size(val, card->iobase+off);                       \
 473 })
 474
 475 #define I810_IOWRITEL(val, card, off)   I810_IOWRITE(l, val, card, off)
 476 #define I810_IOWRITEW(val, card, off)   I810_IOWRITE(w, val, card, off)
 477 #define I810_IOWRITEB(val, card, off)   I810_IOWRITE(b, val, card, off)
 478
 479 #define GET_CIV(card, port) MODULOP2(I810_IOREADB((card), (port) + OFF_CIV), SG_LEN)
 480 #define GET_LVI(card, port) MODULOP2(I810_IOREADB((card), (port) + OFF_LVI), SG_LEN)
 481
 482 /* set LVI from CIV */
 483 #define CIV_TO_LVI(card, port, off) \
 484         I810_IOWRITEB(MODULOP2(GET_CIV((card), (port)) + (off), SG_LEN), (card), (port) + OFF_LVI)
 485
 486 static struct ac97_quirk ac97_quirks[] __devinitdata = {
 487         {
 488                 .vendor = 0x0e11,
 489                 .device = 0x00b8,
 490                 .name = "Compaq Evo D510C",
 491                 .type = AC97_TUNE_HP_ONLY
 492         },
 493         {
 494                 .vendor = 0x1028,
 495                 .device = 0x00d8,
 496                 .name = "Dell Precision 530",   /* AD1885 */
 497                 .type = AC97_TUNE_HP_ONLY
 498         },
 499         {
 500                 .vendor = 0x1028,
 501                 .device = 0x0126,
 502                 .name = "Dell Optiplex GX260",  /* AD1981A */
 503                 .type = AC97_TUNE_HP_ONLY
 504         },
 505         {
 506                 .vendor = 0x1028,
 507                 .device = 0x012d,
 508                 .name = "Dell Precision 450",   /* AD1981B*/
 509                 .type = AC97_TUNE_HP_ONLY
 510         },
 511         {       /* FIXME: which codec? */
 512                 .vendor = 0x103c,
 513                 .device = 0x00c3,
 514                 .name = "Hewlett-Packard onboard",
 515                 .type = AC97_TUNE_HP_ONLY
 516         },
 517         {
 518                 .vendor = 0x103c,
 519                 .device = 0x12f1,
 520                 .name = "HP xw8200",    /* AD1981B*/
 521                 .type = AC97_TUNE_HP_ONLY
 522         },
 523         {
 524                 .vendor = 0x103c,
 525                 .device = 0x3008,
 526                 .name = "HP xw4200",    /* AD1981B*/
 527                 .type = AC97_TUNE_HP_ONLY
 528         },
 529         {
 530                 .vendor = 0x10f1,
 531                 .device = 0x2665,
 532                 .name = "Fujitsu-Siemens Celsius",      /* AD1981? */
 533                 .type = AC97_TUNE_HP_ONLY
 534         },
 535         {
 536                 .vendor = 0x10f1,
 537                 .device = 0x2885,
 538                 .name = "AMD64 Mobo",   /* ALC650 */
 539                 .type = AC97_TUNE_HP_ONLY
 540         },
 541         {
 542                 .vendor = 0x110a,
 543                 .device = 0x0056,
 544                 .name = "Fujitsu-Siemens Scenic",       /* AD1981? */
 545                 .type = AC97_TUNE_HP_ONLY
 546         },
 547         {
 548                 .vendor = 0x11d4,
 549                 .device = 0x5375,
 550                 .name = "ADI AD1985 (discrete)",
 551                 .type = AC97_TUNE_HP_ONLY
 552         },
 553         {
 554                 .vendor = 0x1462,
 555                 .device = 0x5470,
 556                 .name = "MSI P4 ATX 645 Ultra",
 557                 .type = AC97_TUNE_HP_ONLY
 558         },
 559         {
 560                 .vendor = 0x1734,
 561                 .device = 0x0088,
 562                 .name = "Fujitsu-Siemens D1522",        /* AD1981 */
 563                 .type = AC97_TUNE_HP_ONLY
 564         },
 565         {
 566                 .vendor = 0x8086,
 567                 .device = 0x4856,
 568                 .name = "Intel D845WN (82801BA)",
 569                 .type = AC97_TUNE_SWAP_HP
 570         },
 571         {
 572                 .vendor = 0x8086,
 573                 .device = 0x4d44,
 574                 .name = "Intel D850EMV2",       /* AD1885 */
 575                 .type = AC97_TUNE_HP_ONLY
 576         },
 577         {
 578                 .vendor = 0x8086,
 579                 .device = 0x4d56,
 580                 .name = "Intel ICH/AD1885",
 581                 .type = AC97_TUNE_HP_ONLY
 582         },
 583         {
 584                 .vendor = 0x1028,
 585                 .device = 0x012d,
 586                 .name = "Dell Precision 450",   /* AD1981B*/
 587                 .type = AC97_TUNE_HP_ONLY
 588         },
 589         {
 590                 .vendor = 0x103c,
 591                 .device = 0x3008,
 592                 .name = "HP xw4200",    /* AD1981B*/
 593                 .type = AC97_TUNE_HP_ONLY
 594         },
 595         {
 596                 .vendor = 0x103c,
 597                 .device = 0x12f1,
 598                 .name = "HP xw8200",    /* AD1981B*/
 599                 .type = AC97_TUNE_HP_ONLY
 600         },
 601         { } /* terminator */
 602 };
 603
 604 static struct i810_card *devs = NULL;
 605
 606 static int i810_open_mixdev(struct inode *inode, struct file *file);
 607 static int i810_ioctl_mixdev(struct inode *inode, struct file *file,
 608                              unsigned int cmd, unsigned long arg);
 609 static u16 i810_ac97_get(struct ac97_codec *dev, u8 reg);
 610 static void i810_ac97_set(struct ac97_codec *dev, u8 reg, u16 data);
 611 static u16 i810_ac97_get_mmio(struct ac97_codec *dev, u8 reg);
 612 static void i810_ac97_set_mmio(struct ac97_codec *dev, u8 reg, u16 data);
 613 static u16 i810_ac97_get_io(struct ac97_codec *dev, u8 reg);
 614 static void i810_ac97_set_io(struct ac97_codec *dev, u8 reg, u16 data);
 615
 616 static struct i810_channel *i810_alloc_pcm_channel(struct i810_card *card)
 617 {
 618         if(card->channel[1].used==1)
 619                 return NULL;
 620         card->channel[1].used=1;
 621         return &card->channel[1];
 622 }
 623
 624 static struct i810_channel *i810_alloc_rec_pcm_channel(struct i810_card *card)
 625 {
 626         if(card->channel[0].used==1)
 627                 return NULL;
 628         card->channel[0].used=1;
 629         return &card->channel[0];
 630 }
 631
 632 static struct i810_channel *i810_alloc_rec_mic_channel(struct i810_card *card)
 633 {
 634         if(card->channel[2].used==1)
 635                 return NULL;
 636         card->channel[2].used=1;
 637         return &card->channel[2];
 638 }
 639
 640 static void i810_free_pcm_channel(struct i810_card *card, int channel)
 641 {
 642         card->channel[channel].used=0;
 643 }
 644
 645 static int i810_valid_spdif_rate ( struct ac97_codec *codec, int rate )
 646 {
 647         unsigned long id = 0L;
 648
 649         id = (i810_ac97_get(codec, AC97_VENDOR_ID1) << 16);
 650         id |= i810_ac97_get(codec, AC97_VENDOR_ID2) & 0xffff;
 651 #ifdef DEBUG
 652         printk ( "i810_audio: codec = %s, codec_id = 0x%08lx\n", codec->name, id);
 653 #endif
 654         switch ( id ) {
 655                 case 0x41445361: /* AD1886 */
 656                         if (rate == 48000) {
 657                                 return 1;
 658                         }
 659                         break;
 660                 default: /* all other codecs, until we know otherwiae */
 661                         if (rate == 48000 || rate == 44100 || rate == 32000) {
 662                                 return 1;
 663                         }
 664                         break;
 665         }
 666         return (0);
 667 }
 668
 669 /* i810_set_spdif_output
 670  *
 671  *  Configure the S/PDIF output transmitter. When we turn on
 672  *  S/PDIF, we turn off the analog output. This may not be
 673  *  the right thing to do.
 674  *
 675  *  Assumptions:
 676  *     The DSP sample rate must already be set to a supported
 677  *     S/PDIF rate (32kHz, 44.1kHz, or 48kHz) or we abort.
 678  */
 679 static int i810_set_spdif_output(struct i810_state *state, int slots, int rate)
 680 {
 681         int     vol;
 682         int     aud_reg;
 683         int     r = 0;
 684         struct ac97_codec *codec = state->card->ac97_codec[0];
 685
 686         if(!codec->codec_ops->digital) {
 687                 state->card->ac97_status &= ~SPDIF_ON;
 688         } else {
 689                 if ( slots == -1 ) { /* Turn off S/PDIF */
 690                         codec->codec_ops->digital(codec, 0, 0, 0);
 691                         /* If the volume wasn't muted before we turned on S/PDIF, unmute it */
 692                         if ( !(state->card->ac97_status & VOL_MUTED) ) {
 693                                 aud_reg = i810_ac97_get(codec, AC97_MASTER_VOL_STEREO);
 694                                 i810_ac97_set(codec, AC97_MASTER_VOL_STEREO, (aud_reg & ~VOL_MUTED));
 695                         }
 696                         state->card->ac97_status &= ~(VOL_MUTED | SPDIF_ON);
 697                         return 0;
 698                 }
 699
 700                 vol = i810_ac97_get(codec, AC97_MASTER_VOL_STEREO);
 701                 state->card->ac97_status = vol & VOL_MUTED;
 702
 703                 r = codec->codec_ops->digital(codec, slots, rate, 0);
 704
 705                 if(r)
 706                         state->card->ac97_status |= SPDIF_ON;
 707                 else
 708                         state->card->ac97_status &= ~SPDIF_ON;
 709
 710                 /* Mute the analog output */
 711                 /* Should this only mute the PCM volume??? */
 712                 i810_ac97_set(codec, AC97_MASTER_VOL_STEREO, (vol | VOL_MUTED));
 713         }
 714         return r;
 715 }
 716
 717 /* i810_set_dac_channels
 718  *
 719  *  Configure the codec's multi-channel DACs
 720  *
 721  *  The logic is backwards. Setting the bit to 1 turns off the DAC.
 722  *
 723  *  What about the ICH? We currently configure it using the
 724  *  SNDCTL_DSP_CHANNELS ioctl.  If we're turnning on the DAC,
 725  *  does that imply that we want the ICH set to support
 726  *  these channels?
 727  *
 728  *  TODO:
 729  *    vailidate that the codec really supports these DACs
 730  *    before turning them on.
 731  */
 732 static void i810_set_dac_channels(struct i810_state *state, int channel)
 733 {
 734         int     aud_reg;
 735         struct ac97_codec *codec = state->card->ac97_codec[0];
 736
 737         /* No codec, no setup */
 738
 739         if(codec == NULL)
 740                 return;
 741
 742         aud_reg = i810_ac97_get(codec, AC97_EXTENDED_STATUS);
 743         aud_reg |= AC97_EA_PRI | AC97_EA_PRJ | AC97_EA_PRK;
 744         state->card->ac97_status &= ~(SURR_ON | CENTER_LFE_ON);
 745
 746         switch ( channel ) {
 747                 case 2: /* always enabled */
 748                         break;
 749                 case 4:
 750                         aud_reg &= ~AC97_EA_PRJ;
 751                         state->card->ac97_status |= SURR_ON;
 752                         break;
 753                 case 6:
 754                         aud_reg &= ~(AC97_EA_PRJ | AC97_EA_PRI | AC97_EA_PRK);
 755                         state->card->ac97_status |= SURR_ON | CENTER_LFE_ON;
 756                         break;
 757                 default:
 758                         break;
 759         }
 760         i810_ac97_set(codec, AC97_EXTENDED_STATUS, aud_reg);
 761
 762 }
 763
 764
 765 /* set playback sample rate */
 766 static unsigned int i810_set_dac_rate(struct i810_state * state, unsigned int rate)
 767 {
 768         struct dmabuf *dmabuf = &state->dmabuf;
 769         u32 new_rate;
 770         struct ac97_codec *codec=state->card->ac97_codec[0];
 771
 772         if(!(state->card->ac97_features&0x0001))
 773         {
 774                 dmabuf->rate = clocking;
 775 #ifdef DEBUG
 776                 printk("Asked for %d Hz, but ac97_features says we only do %dHz.  Sorry!\n",
 777                        rate,clocking);
 778 #endif
 779                 return clocking;
 780         }
 781
 782         if (rate > 48000)
 783                 rate = 48000;
 784         if (rate < 8000)
 785                 rate = 8000;
 786         dmabuf->rate = rate;
 787
 788         /*
 789          *      Adjust for misclocked crap
 790          */
 791         rate = ( rate * clocking)/48000;
 792         if(strict_clocking && rate < 8000) {
 793                 rate = 8000;
 794                 dmabuf->rate = (rate * 48000)/clocking;
 795         }
 796
 797         new_rate=ac97_set_dac_rate(codec, rate);
 798         if(new_rate != rate) {
 799                 dmabuf->rate = (new_rate * 48000)/clocking;
 800         }
 801 #ifdef DEBUG
 802         printk("i810_audio: called i810_set_dac_rate : asked for %d, got %d\n", rate, dmabuf->rate);
 803 #endif
 804         rate = new_rate;
 805         return dmabuf->rate;
 806 }
 807
 808 /* set recording sample rate */
 809 static unsigned int i810_set_adc_rate(struct i810_state * state, unsigned int rate)
 810 {
 811         struct dmabuf *dmabuf = &state->dmabuf;
 812         u32 new_rate;
 813         struct ac97_codec *codec=state->card->ac97_codec[0];
 814
 815         if(!(state->card->ac97_features&0x0001))
 816         {
 817                 dmabuf->rate = clocking;
 818                 return clocking;
 819         }
 820
 821         if (rate > 48000)
 822                 rate = 48000;
 823         if (rate < 8000)
 824                 rate = 8000;
 825         dmabuf->rate = rate;
 826
 827         /*
 828          *      Adjust for misclocked crap
 829          */
 830
 831         rate = ( rate * clocking)/48000;
 832         if(strict_clocking && rate < 8000) {
 833                 rate = 8000;
 834                 dmabuf->rate = (rate * 48000)/clocking;
 835         }
 836
 837         new_rate = ac97_set_adc_rate(codec, rate);
 838
 839         if(new_rate != rate) {
 840                 dmabuf->rate = (new_rate * 48000)/clocking;
 841                 rate = new_rate;
 842         }
 843 #ifdef DEBUG
 844         printk("i810_audio: called i810_set_adc_rate : rate = %d/%d\n", dmabuf->rate, rate);
 845 #endif
 846         return dmabuf->rate;
 847 }
 848
 849 /* get current playback/recording dma buffer pointer (byte offset from LBA),
 850    called with spinlock held! */
 851
 852 static inline unsigned i810_get_dma_addr(struct i810_state *state, int rec)
 853 {
 854         struct dmabuf *dmabuf = &state->dmabuf;
 855         unsigned int civ, offset, port, port_picb, bytes = 2;
 856
 857         if (!dmabuf->enable)
 858                 return 0;
 859
 860         if (rec)
 861                 port = dmabuf->read_channel->port;
 862         else
 863                 port = dmabuf->write_channel->port;
 864
 865         if(state->card->pci_id == PCI_DEVICE_ID_SI_7012) {
 866                 port_picb = port + OFF_SR;
 867                 bytes = 1;
 868         } else
 869                 port_picb = port + OFF_PICB;
 870
 871         do {
 872                 civ = GET_CIV(state->card, port);
 873                 offset = I810_IOREADW(state->card, port_picb);
 874                 /* Must have a delay here! */
 875                 if(offset == 0)
 876                         udelay(1);
 877                 /* Reread both registers and make sure that that total
 878                  * offset from the first reading to the second is 0.
 879                  * There is an issue with SiS hardware where it will count
 880                  * picb down to 0, then update civ to the next value,
 881                  * then set the new picb to fragsize bytes.  We can catch
 882                  * it between the civ update and the picb update, making
 883                  * it look as though we are 1 fragsize ahead of where we
 884                  * are.  The next to we get the address though, it will
 885                  * be back in the right place, and we will suddenly think
 886                  * we just went forward dmasize - fragsize bytes, causing
 887                  * totally stupid *huge* dma overrun messages.  We are
 888                  * assuming that the 1us delay is more than long enough
 889                  * that we won't have to worry about the chip still being
 890                  * out of sync with reality ;-)
 891                  */
 892         } while (civ != GET_CIV(state->card, port) || offset != I810_IOREADW(state->card, port_picb));
 893
 894         return (((civ + 1) * dmabuf->fragsize - (bytes * offset))
 895                 % dmabuf->dmasize);
 896 }
 897
 898 /* Stop recording (lock held) */
 899 static inline void __stop_adc(struct i810_state *state)
 900 {
 901         struct dmabuf *dmabuf = &state->dmabuf;
 902         struct i810_card *card = state->card;
 903
 904         dmabuf->enable &= ~ADC_RUNNING;
 905         I810_IOWRITEB(0, card, PI_CR);
 906         // wait for the card to acknowledge shutdown
 907         while( I810_IOREADB(card, PI_CR) != 0 ) ;
 908         // now clear any latent interrupt bits (like the halt bit)
 909         if(card->pci_id == PCI_DEVICE_ID_SI_7012)
 910                 I810_IOWRITEB( I810_IOREADB(card, PI_PICB), card, PI_PICB );
 911         else
 912                 I810_IOWRITEB( I810_IOREADB(card, PI_SR), card, PI_SR );
 913         I810_IOWRITEL( I810_IOREADL(card, GLOB_STA) & INT_PI, card, GLOB_STA);
 914 }
 915
 916 static void stop_adc(struct i810_state *state)
 917 {
 918         struct i810_card *card = state->card;
 919         unsigned long flags;
 920
 921         spin_lock_irqsave(&card->lock, flags);
 922         __stop_adc(state);
 923         spin_unlock_irqrestore(&card->lock, flags);
 924 }
 925
 926 static inline void __start_adc(struct i810_state *state)
 927 {
 928         struct dmabuf *dmabuf = &state->dmabuf;
 929
 930         if (dmabuf->count < dmabuf->dmasize && dmabuf->ready && !dmabuf->enable &&
 931             (dmabuf->trigger & PCM_ENABLE_INPUT)) {
 932                 dmabuf->enable |= ADC_RUNNING;
 933                 // Interrupt enable, LVI enable, DMA enable
 934                 I810_IOWRITEB(0x10 | 0x04 | 0x01, state->card, PI_CR);
 935         }
 936 }
 937
 938 static void start_adc(struct i810_state *state)
 939 {
 940         struct i810_card *card = state->card;
 941         unsigned long flags;
 942
 943         spin_lock_irqsave(&card->lock, flags);
 944         __start_adc(state);
 945         spin_unlock_irqrestore(&card->lock, flags);
 946 }
 947
 948 /* stop playback (lock held) */
 949 static inline void __stop_dac(struct i810_state *state)
 950 {
 951         struct dmabuf *dmabuf = &state->dmabuf;
 952         struct i810_card *card = state->card;
 953
 954         dmabuf->enable &= ~DAC_RUNNING;
 955         I810_IOWRITEB(0, card, PO_CR);
 956         // wait for the card to acknowledge shutdown
 957         while( I810_IOREADB(card, PO_CR) != 0 ) ;
 958         // now clear any latent interrupt bits (like the halt bit)
 959         if(card->pci_id == PCI_DEVICE_ID_SI_7012)
 960                 I810_IOWRITEB( I810_IOREADB(card, PO_PICB), card, PO_PICB );
 961         else
 962                 I810_IOWRITEB( I810_IOREADB(card, PO_SR), card, PO_SR );
 963         I810_IOWRITEL( I810_IOREADL(card, GLOB_STA) & INT_PO, card, GLOB_STA);
 964 }
 965
 966 static void stop_dac(struct i810_state *state)
 967 {
 968         struct i810_card *card = state->card;
 969         unsigned long flags;
 970
 971         spin_lock_irqsave(&card->lock, flags);
 972         __stop_dac(state);
 973         spin_unlock_irqrestore(&card->lock, flags);
 974 }
 975
 976 static inline void __start_dac(struct i810_state *state)
 977 {
 978         struct dmabuf *dmabuf = &state->dmabuf;
 979
 980         if (dmabuf->count > 0 && dmabuf->ready && !dmabuf->enable &&
 981             (dmabuf->trigger & PCM_ENABLE_OUTPUT)) {
 982                 dmabuf->enable |= DAC_RUNNING;
 983                 // Interrupt enable, LVI enable, DMA enable
 984                 I810_IOWRITEB(0x10 | 0x04 | 0x01, state->card, PO_CR);
 985         }
 986 }
 987 static void start_dac(struct i810_state *state)
 988 {
 989         struct i810_card *card = state->card;
 990         unsigned long flags;
 991
 992         spin_lock_irqsave(&card->lock, flags);
 993         __start_dac(state);
 994         spin_unlock_irqrestore(&card->lock, flags);
 995 }
 996
 997 #define DMABUF_DEFAULTORDER (16-PAGE_SHIFT)
 998 #define DMABUF_MINORDER 1
 999
1000 /* allocate DMA buffer, playback and recording buffer should be allocated separately */
1001 static int alloc_dmabuf(struct i810_state *state)
1002 {
1003         struct dmabuf *dmabuf = &state->dmabuf;
1004         void *rawbuf= NULL;
1005         int order, size;
1006         struct page *page, *pend;
1007
1008         /* If we don't have any oss frag params, then use our default ones */
1009         if(dmabuf->ossmaxfrags == 0)
1010                 dmabuf->ossmaxfrags = 4;
1011         if(dmabuf->ossfragsize == 0)
1012                 dmabuf->ossfragsize = (PAGE_SIZE<<DMABUF_DEFAULTORDER)/dmabuf->ossmaxfrags;
1013         size = dmabuf->ossfragsize * dmabuf->ossmaxfrags;
1014
1015         if(dmabuf->rawbuf && (PAGE_SIZE << dmabuf->buforder) == size)
1016                 return 0;
1017         /* alloc enough to satisfy the oss params */
1018         for (order = DMABUF_DEFAULTORDER; order >= DMABUF_MINORDER; order--) {
1019                 if ( (PAGE_SIZE<<order) > size )
1020                         continue;
1021                 if ((rawbuf = pci_alloc_consistent(state->card->pci_dev,
1022                                                    PAGE_SIZE << order,
1023                                                    &dmabuf->dma_handle)))
1024                         break;
1025         }
1026         if (!rawbuf)
1027                 return -ENOMEM;
1028
1029
1030 #ifdef DEBUG
1031         printk("i810_audio: allocated %ld (order = %d) bytes at %p\n",
1032                PAGE_SIZE << order, order, rawbuf);
1033 #endif
1034
1035         dmabuf->ready  = dmabuf->mapped = 0;
1036         dmabuf->rawbuf = rawbuf;
1037         dmabuf->buforder = order;
1038
1039         /* now mark the pages as reserved; otherwise remap_pfn_range doesn't do what we want */
1040         pend = virt_to_page(rawbuf + (PAGE_SIZE << order) - 1);
1041         for (page = virt_to_page(rawbuf); page <= pend; page++)
1042                 SetPageReserved(page);
1043
1044         return 0;
1045 }
1046
1047 /* free DMA buffer */
1048 static void dealloc_dmabuf(struct i810_state *state)
1049 {
1050         struct dmabuf *dmabuf = &state->dmabuf;
1051         struct page *page, *pend;
1052
1053         if (dmabuf->rawbuf) {
1054                 /* undo marking the pages as reserved */
1055                 pend = virt_to_page(dmabuf->rawbuf + (PAGE_SIZE << dmabuf->buforder) - 1);
1056                 for (page = virt_to_page(dmabuf->rawbuf); page <= pend; page++)
1057                         ClearPageReserved(page);
1058                 pci_free_consistent(state->card->pci_dev, PAGE_SIZE << dmabuf->buforder,
1059                                     dmabuf->rawbuf, dmabuf->dma_handle);
1060         }
1061         dmabuf->rawbuf = NULL;
1062         dmabuf->mapped = dmabuf->ready = 0;
1063 }
1064
1065 static int prog_dmabuf(struct i810_state *state, unsigned rec)
1066 {
1067         struct dmabuf *dmabuf = &state->dmabuf;
1068         struct i810_channel *c;
1069         struct sg_item *sg;
1070         unsigned long flags;
1071         int ret;
1072         unsigned fragint;
1073         int i;
1074
1075         spin_lock_irqsave(&state->card->lock, flags);
1076         if(dmabuf->enable & DAC_RUNNING)
1077                 __stop_dac(state);
1078         if(dmabuf->enable & ADC_RUNNING)
1079                 __stop_adc(state);
1080         dmabuf->total_bytes = 0;
1081         dmabuf->count = dmabuf->error = 0;
1082         dmabuf->swptr = dmabuf->hwptr = 0;
1083         spin_unlock_irqrestore(&state->card->lock, flags);
1084
1085         /* allocate DMA buffer, let alloc_dmabuf determine if we are already
1086          * allocated well enough or if we should replace the current buffer
1087          * (assuming one is already allocated, if it isn't, then allocate it).
1088          */
1089         if ((ret = alloc_dmabuf(state)))
1090                 return ret;
1091
1092         /* FIXME: figure out all this OSS fragment stuff */
1093         /* I did, it now does what it should according to the OSS API.  DL */
1094         /* We may not have realloced our dmabuf, but the fragment size to
1095          * fragment number ratio may have changed, so go ahead and reprogram
1096          * things
1097          */
1098         dmabuf->dmasize = PAGE_SIZE << dmabuf->buforder;
1099         dmabuf->numfrag = SG_LEN;
1100         dmabuf->fragsize = dmabuf->dmasize/dmabuf->numfrag;
1101         dmabuf->fragsamples = dmabuf->fragsize >> 1;
1102         dmabuf->fragshift = ffs(dmabuf->fragsize) - 1;
1103         dmabuf->userfragsize = dmabuf->ossfragsize;
1104         dmabuf->userfrags = dmabuf->dmasize/dmabuf->ossfragsize;
1105
1106         memset(dmabuf->rawbuf, 0, dmabuf->dmasize);
1107
1108         if(dmabuf->ossmaxfrags == 4) {
1109                 fragint = 8;
1110         } else if (dmabuf->ossmaxfrags == 8) {
1111                 fragint = 4;
1112         } else if (dmabuf->ossmaxfrags == 16) {
1113                 fragint = 2;
1114         } else {
1115                 fragint = 1;
1116         }
1117         /*
1118          *      Now set up the ring
1119          */
1120         if(dmabuf->read_channel)
1121                 c = dmabuf->read_channel;
1122         else
1123                 c = dmabuf->write_channel;
1124         while(c != NULL) {
1125                 sg=&c->sg[0];
1126                 /*
1127                  *      Load up 32 sg entries and take an interrupt at half
1128                  *      way (we might want more interrupts later..)
1129                  */
1130
1131                 for(i=0;i<dmabuf->numfrag;i++)
1132                 {
1133                         sg->busaddr=(u32)dmabuf->dma_handle+dmabuf->fragsize*i;
1134                         // the card will always be doing 16bit stereo
1135                         sg->control=dmabuf->fragsamples;
1136                         if(state->card->pci_id == PCI_DEVICE_ID_SI_7012)
1137                                 sg->control <<= 1;
1138                         sg->control|=CON_BUFPAD;
1139                         // set us up to get IOC interrupts as often as needed to
1140                         // satisfy numfrag requirements, no more
1141                         if( ((i+1) % fragint) == 0) {
1142                                 sg->control|=CON_IOC;
1143                         }
1144                         sg++;
1145                 }
1146                 spin_lock_irqsave(&state->card->lock, flags);
1147                 I810_IOWRITEB(2, state->card, c->port+OFF_CR);   /* reset DMA machine */
1148                 while( I810_IOREADB(state->card, c->port+OFF_CR) & 0x02 ) ;
1149                 I810_IOWRITEL((u32)state->card->chandma +
1150                     c->num*sizeof(struct i810_channel),
1151                     state->card, c->port+OFF_BDBAR);
1152                 CIV_TO_LVI(state->card, c->port, 0);
1153
1154                 spin_unlock_irqrestore(&state->card->lock, flags);
1155
1156                 if(c != dmabuf->write_channel)
1157                         c = dmabuf->write_channel;
1158                 else
1159                         c = NULL;
1160         }
1161
1162         /* set the ready flag for the dma buffer */
1163         dmabuf->ready = 1;
1164
1165 #ifdef DEBUG
1166         printk("i810_audio: prog_dmabuf, sample rate = %d, format = %d,\n\tnumfrag = %d, "
1167                "fragsize = %d dmasize = %d\n",
1168                dmabuf->rate, dmabuf->fmt, dmabuf->numfrag,
1169                dmabuf->fragsize, dmabuf->dmasize);
1170 #endif
1171
1172         return 0;
1173 }
1174
1175 static void __i810_update_lvi(struct i810_state *state, int rec)
1176 {
1177         struct dmabuf *dmabuf = &state->dmabuf;
1178         int x, port;
1179         int trigger;
1180         int count, fragsize;
1181         void (*start)(struct i810_state *);
1182
1183         count = dmabuf->count;
1184         if (rec) {
1185                 port = dmabuf->read_channel->port;
1186                 trigger = PCM_ENABLE_INPUT;
1187                 start = __start_adc;
1188                 count = dmabuf->dmasize - count;
1189         } else {
1190                 port = dmabuf->write_channel->port;
1191                 trigger = PCM_ENABLE_OUTPUT;
1192                 start = __start_dac;
1193         }
1194
1195         /* Do not process partial fragments. */
1196         fragsize = dmabuf->fragsize;
1197         if (count < fragsize)
1198                 return;
1199
1200         /* if we are currently stopped, then our CIV is actually set to our
1201          * *last* sg segment and we are ready to wrap to the next.  However,
1202          * if we set our LVI to the last sg segment, then it won't wrap to
1203          * the next sg segment, it won't even get a start.  So, instead, when
1204          * we are stopped, we set both the LVI value and also we increment
1205          * the CIV value to the next sg segment to be played so that when
1206          * we call start, things will operate properly.  Since the CIV can't
1207          * be written to directly for this purpose, we set the LVI to CIV + 1
1208          * temporarily.  Once the engine has started we set the LVI to its
1209          * final value.
1210          */
1211         if (!dmabuf->enable && dmabuf->ready) {
1212                 if (!(dmabuf->trigger & trigger))
1213                         return;
1214
1215                 CIV_TO_LVI(state->card, port, 1);
1216
1217                 start(state);
1218                 while (!(I810_IOREADB(state->card, port + OFF_CR) & ((1<<4) | (1<<2))))
1219                         ;
1220         }
1221
1222         /* MASKP2(swptr, fragsize) - 1 is the tail of our transfer */
1223         x = MODULOP2(MASKP2(dmabuf->swptr, fragsize) - 1, dmabuf->dmasize);
1224         x >>= dmabuf->fragshift;
1225         I810_IOWRITEB(x, state->card, port + OFF_LVI);
1226 }
1227
1228 static void i810_update_lvi(struct i810_state *state, int rec)
1229 {
1230         struct dmabuf *dmabuf = &state->dmabuf;
1231         unsigned long flags;
1232
1233         if(!dmabuf->ready)
1234                 return;
1235         spin_lock_irqsave(&state->card->lock, flags);
1236         __i810_update_lvi(state, rec);
1237         spin_unlock_irqrestore(&state->card->lock, flags);
1238 }
1239
1240 /* update buffer manangement pointers, especially, dmabuf->count and dmabuf->hwptr */
1241 static void i810_update_ptr(struct i810_state *state)
1242 {
1243         struct dmabuf *dmabuf = &state->dmabuf;
1244         unsigned hwptr;
1245         unsigned fragmask, dmamask;
1246         int diff;
1247
1248         fragmask = MASKP2(~0, dmabuf->fragsize);
1249         dmamask = MODULOP2(~0, dmabuf->dmasize);
1250
1251         /* error handling and process wake up for ADC */
1252         if (dmabuf->enable == ADC_RUNNING) {
1253                 /* update hardware pointer */
1254                 hwptr = i810_get_dma_addr(state, 1) & fragmask;
1255                 diff = (hwptr - dmabuf->hwptr) & dmamask;
1256 #if defined(DEBUG_INTERRUPTS) || defined(DEBUG_MMAP)
1257                 printk("ADC HWP %d,%d,%d\n", hwptr, dmabuf->hwptr, diff);
1258 #endif
1259                 dmabuf->hwptr = hwptr;
1260                 dmabuf->total_bytes += diff;
1261                 dmabuf->count += diff;
1262                 if (dmabuf->count > dmabuf->dmasize) {
1263                         /* buffer underrun or buffer overrun */
1264                         /* this is normal for the end of a read */
1265                         /* only give an error if we went past the */
1266                         /* last valid sg entry */
1267                         if (GET_CIV(state->card, PI_BASE) !=
1268                             GET_LVI(state->card, PI_BASE)) {
1269                                 printk(KERN_WARNING "i810_audio: DMA overrun on read\n");
1270                                 dmabuf->error++;
1271                         }
1272                 }
1273                 if (diff)
1274                         wake_up(&dmabuf->wait);
1275         }
1276         /* error handling and process wake up for DAC */
1277         if (dmabuf->enable == DAC_RUNNING) {
1278                 /* update hardware pointer */
1279                 hwptr = i810_get_dma_addr(state, 0) & fragmask;
1280                 diff = (hwptr - dmabuf->hwptr) & dmamask;
1281 #if defined(DEBUG_INTERRUPTS) || defined(DEBUG_MMAP)
1282                 printk("DAC HWP %d,%d,%d\n", hwptr, dmabuf->hwptr, diff);
1283 #endif
1284                 dmabuf->hwptr = hwptr;
1285                 dmabuf->total_bytes += diff;
1286                 dmabuf->count -= diff;
1287                 if (dmabuf->count < 0) {
1288                         /* buffer underrun or buffer overrun */
1289                         /* this is normal for the end of a write */
1290                         /* only give an error if we went past the */
1291                         /* last valid sg entry */
1292                         if (GET_CIV(state->card, PO_BASE) !=
1293                             GET_LVI(state->card, PO_BASE)) {
1294                                 printk(KERN_WARNING "i810_audio: DMA overrun on write\n");
1295                                 printk("i810_audio: CIV %d, LVI %d, hwptr %x, "
1296                                         "count %d\n",
1297                                         GET_CIV(state->card, PO_BASE),
1298                                         GET_LVI(state->card, PO_BASE),
1299                                         dmabuf->hwptr, dmabuf->count);
1300                                 dmabuf->error++;
1301                         }
1302                 }
1303                 if (diff)
1304                         wake_up(&dmabuf->wait);
1305         }
1306 }
1307
1308 static inline int i810_get_free_write_space(struct i810_state *state)
1309 {
1310         struct dmabuf *dmabuf = &state->dmabuf;
1311         int free;
1312
1313         i810_update_ptr(state);
1314         // catch underruns during playback
1315         if (dmabuf->count < 0) {
1316                 dmabuf->count = 0;
1317                 dmabuf->swptr = dmabuf->hwptr;
1318         }
1319         free = dmabuf->dmasize - dmabuf->count;
1320         if(free < 0)
1321                 return(0);
1322         return(free);
1323 }
1324
1325 static inline int i810_get_available_read_data(struct i810_state *state)
1326 {
1327         struct dmabuf *dmabuf = &state->dmabuf;
1328         int avail;
1329
1330         i810_update_ptr(state);
1331         // catch overruns during record
1332         if (dmabuf->count > dmabuf->dmasize) {
1333                 dmabuf->count = dmabuf->dmasize;
1334                 dmabuf->swptr = dmabuf->hwptr;
1335         }
1336         avail = dmabuf->count;
1337         if(avail < 0)
1338                 return(0);
1339         return(avail);
1340 }
1341
1342 static inline void fill_partial_frag(struct dmabuf *dmabuf)
1343 {
1344         unsigned fragsize;
1345         unsigned swptr, len;
1346
1347         fragsize = dmabuf->fragsize;
1348         swptr = dmabuf->swptr;
1349         len = fragsize - MODULOP2(dmabuf->swptr, fragsize);
1350         if (len == fragsize)
1351                 return;
1352
1353         memset(dmabuf->rawbuf + swptr, '\0', len);
1354         dmabuf->swptr = MODULOP2(swptr + len, dmabuf->dmasize);
1355         dmabuf->count += len;
1356 }
1357
1358 static int drain_dac(struct i810_state *state, int signals_allowed)
1359 {
1360         DECLARE_WAITQUEUE(wait, current);
1361         struct dmabuf *dmabuf = &state->dmabuf;
1362         unsigned long flags;
1363         unsigned long tmo;
1364         int count;
1365
1366         if (!dmabuf->ready)
1367                 return 0;
1368         if(dmabuf->mapped) {
1369                 stop_dac(state);
1370                 return 0;
1371         }
1372
1373         spin_lock_irqsave(&state->card->lock, flags);
1374
1375         fill_partial_frag(dmabuf);
1376
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         dmabuf->trigger = PCM_ENABLE_OUTPUT;
1384         __i810_update_lvi(state, 0);
1385
1386         spin_unlock_irqrestore(&state->card->lock, flags);
1387
1388         add_wait_queue(&dmabuf->wait, &wait);
1389         for (;;) {
1390
1391                 spin_lock_irqsave(&state->card->lock, flags);
1392                 i810_update_ptr(state);
1393                 count = dmabuf->count;
1394
1395                 /* It seems that we have to set the current state to
1396                  * TASK_INTERRUPTIBLE every time to make the process
1397                  * really go to sleep.  This also has to be *after* the
1398                  * update_ptr() call because update_ptr is likely to
1399                  * do a wake_up() which will unset this before we ever
1400                  * try to sleep, resuling in a tight loop in this code
1401                  * instead of actually sleeping and waiting for an
1402                  * interrupt to wake us up!
1403                  */
1404                 __set_current_state(signals_allowed ?
1405                                     TASK_INTERRUPTIBLE : TASK_UNINTERRUPTIBLE);
1406                 spin_unlock_irqrestore(&state->card->lock, flags);
1407
1408                 if (count <= 0)
1409                         break;
1410
1411                 if (signal_pending(current) && signals_allowed) {
1412                         break;
1413                 }
1414
1415                 /*
1416                  * set the timeout to significantly longer than it *should*
1417                  * take for the DAC to drain the DMA buffer
1418                  */
1419                 tmo = (count * HZ) / (dmabuf->rate);
1420                 if (!schedule_timeout(tmo >= 2 ? tmo : 2)){
1421                         printk(KERN_ERR "i810_audio: drain_dac, dma timeout?\n");
1422                         count = 0;
1423                         break;
1424                 }
1425         }
1426         set_current_state(TASK_RUNNING);
1427         remove_wait_queue(&dmabuf->wait, &wait);
1428         if(count > 0 && signal_pending(current) && signals_allowed)
1429                 return -ERESTARTSYS;
1430         stop_dac(state);
1431         return 0;
1432 }
1433
1434 static void i810_channel_interrupt(struct i810_card *card)
1435 {
1436         int i, count;
1437
1438 #ifdef DEBUG_INTERRUPTS
1439         printk("CHANNEL ");
1440 #endif
1441         for(i=0;i<NR_HW_CH;i++)
1442         {
1443                 struct i810_state *state = card->states[i];
1444                 struct i810_channel *c;
1445                 struct dmabuf *dmabuf;
1446                 unsigned long port;
1447                 u16 status;
1448
1449                 if(!state)
1450                         continue;
1451                 if(!state->dmabuf.ready)
1452                         continue;
1453                 dmabuf = &state->dmabuf;
1454                 if(dmabuf->enable & DAC_RUNNING) {
1455                         c=dmabuf->write_channel;
1456                 } else if(dmabuf->enable & ADC_RUNNING) {
1457                         c=dmabuf->read_channel;
1458                 } else  /* This can occur going from R/W to close */
1459                         continue;
1460
1461                 port = c->port;
1462
1463                 if(card->pci_id == PCI_DEVICE_ID_SI_7012)
1464                         status = I810_IOREADW(card, port + OFF_PICB);
1465                 else
1466                         status = I810_IOREADW(card, port + OFF_SR);
1467
1468 #ifdef DEBUG_INTERRUPTS
1469                 printk("NUM %d PORT %X IRQ ( ST%d ", c->num, c->port, status);
1470 #endif
1471                 if(status & DMA_INT_COMPLETE)
1472                 {
1473                         /* only wake_up() waiters if this interrupt signals
1474                          * us being beyond a userfragsize of data open or
1475                          * available, and i810_update_ptr() does that for
1476                          * us
1477                          */
1478                         i810_update_ptr(state);
1479 #ifdef DEBUG_INTERRUPTS
1480                         printk("COMP %d ", dmabuf->hwptr /
1481                                         dmabuf->fragsize);
1482 #endif
1483                 }
1484                 if(status & (DMA_INT_LVI | DMA_INT_DCH))
1485                 {
1486                         /* wake_up() unconditionally on LVI and DCH */
1487                         i810_update_ptr(state);
1488                         wake_up(&dmabuf->wait);
1489 #ifdef DEBUG_INTERRUPTS
1490                         if(status & DMA_INT_LVI)
1491                                 printk("LVI ");
1492                         if(status & DMA_INT_DCH)
1493                                 printk("DCH -");
1494 #endif
1495                         count = dmabuf->count;
1496                         if(dmabuf->enable & ADC_RUNNING)
1497                                 count = dmabuf->dmasize - count;
1498                         if (count >= (int)dmabuf->fragsize) {
1499                                 I810_IOWRITEB(I810_IOREADB(card, port+OFF_CR) | 1, card, port+OFF_CR);
1500 #ifdef DEBUG_INTERRUPTS
1501                                 printk(" CONTINUE ");
1502 #endif
1503                         } else {
1504                                 if (dmabuf->enable & DAC_RUNNING)
1505                                         __stop_dac(state);
1506                                 if (dmabuf->enable & ADC_RUNNING)
1507                                         __stop_adc(state);
1508                                 dmabuf->enable = 0;
1509 #ifdef DEBUG_INTERRUPTS
1510                                 printk(" STOP ");
1511 #endif
1512                         }
1513                 }
1514                 if(card->pci_id == PCI_DEVICE_ID_SI_7012)
1515                         I810_IOWRITEW(status & DMA_INT_MASK, card, port + OFF_PICB);
1516                 else
1517                         I810_IOWRITEW(status & DMA_INT_MASK, card, port + OFF_SR);
1518         }
1519 #ifdef DEBUG_INTERRUPTS
1520         printk(")\n");
1521 #endif
1522 }
1523
1524 static irqreturn_t i810_interrupt(int irq, void *dev_id, struct pt_regs *regs)
1525 {
1526         struct i810_card *card = (struct i810_card *)dev_id;
1527         u32 status;
1528
1529         spin_lock(&card->lock);
1530
1531         status = I810_IOREADL(card, GLOB_STA);
1532
1533         if(!(status & INT_MASK))
1534         {
1535                 spin_unlock(&card->lock);
1536                 return IRQ_NONE;  /* not for us */
1537         }
1538
1539         if(status & (INT_PO|INT_PI|INT_MC))
1540                 i810_channel_interrupt(card);
1541
1542         /* clear 'em */
1543         I810_IOWRITEL(status & INT_MASK, card, GLOB_STA);
1544         spin_unlock(&card->lock);
1545         return IRQ_HANDLED;
1546 }
1547
1548 /* in this loop, dmabuf.count signifies the amount of data that is
1549    waiting to be copied to the user's buffer.  It is filled by the dma
1550    machine and drained by this loop. */
1551
1552 static ssize_t i810_read(struct file *file, char __user *buffer, size_t count, loff_t *ppos)
1553 {
1554         struct i810_state *state = (struct i810_state *)file->private_data;
1555         struct i810_card *card=state ? state->card : NULL;
1556         struct dmabuf *dmabuf = &state->dmabuf;
1557         ssize_t ret;
1558         unsigned long flags;
1559         unsigned int swptr;
1560         int cnt;
1561         int pending;
1562         DECLARE_WAITQUEUE(waita, current);
1563
1564 #ifdef DEBUG2
1565         printk("i810_audio: i810_read called, count = %d\n", count);
1566 #endif
1567
1568         if (dmabuf->mapped)
1569                 return -ENXIO;
1570         if (dmabuf->enable & DAC_RUNNING)
1571                 return -ENODEV;
1572         if (!dmabuf->read_channel) {
1573                 dmabuf->ready = 0;
1574                 dmabuf->read_channel = card->alloc_rec_pcm_channel(card);
1575                 if (!dmabuf->read_channel) {
1576                         return -EBUSY;
1577                 }
1578         }
1579         if (!dmabuf->ready && (ret = prog_dmabuf(state, 1)))
1580                 return ret;
1581         if (!access_ok(VERIFY_WRITE, buffer, count))
1582                 return -EFAULT;
1583         ret = 0;
1584
1585         pending = 0;
1586
1587         add_wait_queue(&dmabuf->wait, &waita);
1588         while (count > 0) {
1589                 set_current_state(TASK_INTERRUPTIBLE);
1590                 spin_lock_irqsave(&card->lock, flags);
1591                 if (PM_SUSPENDED(card)) {
1592                         spin_unlock_irqrestore(&card->lock, flags);
1593                         schedule();
1594                         if (signal_pending(current)) {
1595                                 if (!ret) ret = -EAGAIN;
1596                                 break;
1597                         }
1598                         continue;
1599                 }
1600                 cnt = i810_get_available_read_data(state);
1601                 swptr = dmabuf->swptr;
1602                 // this is to make the copy_to_user simpler below
1603                 if(cnt > (dmabuf->dmasize - swptr))
1604                         cnt = dmabuf->dmasize - swptr;
1605                 spin_unlock_irqrestore(&card->lock, flags);
1606
1607                 if (cnt > count)
1608                         cnt = count;
1609                 if (cnt <= 0) {
1610                         unsigned long tmo;
1611                         /*
1612                          * Don't let us deadlock.  The ADC won't start if
1613                          * dmabuf->trigger isn't set.  A call to SETTRIGGER
1614                          * could have turned it off after we set it to on
1615                          * previously.
1616                          */
1617                         dmabuf->trigger = PCM_ENABLE_INPUT;
1618                         /*
1619                          * This does three things.  Updates LVI to be correct,
1620                          * makes sure the ADC is running, and updates the
1621                          * hwptr.
1622                          */
1623                         i810_update_lvi(state,1);
1624                         if (file->f_flags & O_NONBLOCK) {
1625                                 if (!ret) ret = -EAGAIN;
1626                                 goto done;
1627                         }
1628                         /* Set the timeout to how long it would take to fill
1629                          * two of our buffers.  If we haven't been woke up
1630                          * by then, then we know something is wrong.
1631                          */
1632                         tmo = (dmabuf->dmasize * HZ * 2) / (dmabuf->rate * 4);
1633                         /* There are two situations when sleep_on_timeout returns, one is when
1634                            the interrupt is serviced correctly and the process is waked up by
1635                            ISR ON TIME. Another is when timeout is expired, which means that
1636                            either interrupt is NOT serviced correctly (pending interrupt) or it
1637                            is TOO LATE for the process to be scheduled to run (scheduler latency)
1638                            which results in a (potential) buffer overrun. And worse, there is
1639                            NOTHING we can do to prevent it. */
1640                         if (!schedule_timeout(tmo >= 2 ? tmo : 2)) {
1641 #ifdef DEBUG
1642                                 printk(KERN_ERR "i810_audio: recording schedule timeout, "
1643                                        "dmasz %u fragsz %u count %i hwptr %u swptr %u\n",
1644                                        dmabuf->dmasize, dmabuf->fragsize, dmabuf->count,
1645                                        dmabuf->hwptr, dmabuf->swptr);
1646 #endif
1647                                 /* a buffer overrun, we delay the recovery until next time the
1648                                    while loop begin and we REALLY have space to record */
1649                         }
1650                         if (signal_pending(current)) {
1651                                 ret = ret ? ret : -ERESTARTSYS;
1652                                 goto done;
1653                         }
1654                         continue;
1655                 }
1656
1657                 if (copy_to_user(buffer, dmabuf->rawbuf + swptr, cnt)) {
1658                         if (!ret) ret = -EFAULT;
1659                         goto done;
1660                 }
1661
1662                 swptr = MODULOP2(swptr + cnt, dmabuf->dmasize);
1663
1664                 spin_lock_irqsave(&card->lock, flags);
1665
1666                 if (PM_SUSPENDED(card)) {
1667                         spin_unlock_irqrestore(&card->lock, flags);
1668                         continue;
1669                 }
1670                 dmabuf->swptr = swptr;
1671                 pending = dmabuf->count -= cnt;
1672                 spin_unlock_irqrestore(&card->lock, flags);
1673
1674                 count -= cnt;
1675                 buffer += cnt;
1676                 ret += cnt;
1677         }
1678  done:
1679         pending = dmabuf->dmasize - pending;
1680         if (dmabuf->enable || pending >= dmabuf->userfragsize)
1681                 i810_update_lvi(state, 1);
1682         set_current_state(TASK_RUNNING);
1683         remove_wait_queue(&dmabuf->wait, &waita);
1684
1685         return ret;
1686 }
1687
1688 /* in this loop, dmabuf.count signifies the amount of data that is waiting to be dma to
1689    the soundcard.  it is drained by the dma machine and filled by this loop. */
1690 static ssize_t i810_write(struct file *file, const char __user *buffer, size_t count, loff_t *ppos)
1691 {
1692         struct i810_state *state = (struct i810_state *)file->private_data;
1693         struct i810_card *card=state ? state->card : NULL;
1694         struct dmabuf *dmabuf = &state->dmabuf;
1695         ssize_t ret;
1696         unsigned long flags;
1697         unsigned int swptr = 0;
1698         int pending;
1699         int cnt;
1700         DECLARE_WAITQUEUE(waita, current);
1701
1702 #ifdef DEBUG2
1703         printk("i810_audio: i810_write called, count = %d\n", count);
1704 #endif
1705
1706         if (dmabuf->mapped)
1707                 return -ENXIO;
1708         if (dmabuf->enable & ADC_RUNNING)
1709                 return -ENODEV;
1710         if (!dmabuf->write_channel) {
1711                 dmabuf->ready = 0;
1712                 dmabuf->write_channel = card->alloc_pcm_channel(card);
1713                 if(!dmabuf->write_channel)
1714                         return -EBUSY;
1715         }
1716         if (!dmabuf->ready && (ret = prog_dmabuf(state, 0)))
1717                 return ret;
1718         if (!access_ok(VERIFY_READ, buffer, count))
1719                 return -EFAULT;
1720         ret = 0;
1721
1722         pending = 0;
1723
1724         add_wait_queue(&dmabuf->wait, &waita);
1725         while (count > 0) {
1726                 set_current_state(TASK_INTERRUPTIBLE);
1727                 spin_lock_irqsave(&state->card->lock, flags);
1728                 if (PM_SUSPENDED(card)) {
1729                         spin_unlock_irqrestore(&card->lock, flags);
1730                         schedule();
1731                         if (signal_pending(current)) {
1732                                 if (!ret) ret = -EAGAIN;
1733                                 break;
1734                         }
1735                         continue;
1736                 }
1737
1738                 cnt = i810_get_free_write_space(state);
1739                 swptr = dmabuf->swptr;
1740                 /* Bound the maximum size to how much we can copy to the
1741                  * dma buffer before we hit the end.  If we have more to
1742                  * copy then it will get done in a second pass of this
1743                  * loop starting from the beginning of the buffer.
1744                  */
1745                 if(cnt > (dmabuf->dmasize - swptr))
1746                         cnt = dmabuf->dmasize - swptr;
1747                 spin_unlock_irqrestore(&state->card->lock, flags);
1748
1749 #ifdef DEBUG2
1750                 printk(KERN_INFO "i810_audio: i810_write: %d bytes available space\n", cnt);
1751 #endif
1752                 if (cnt > count)
1753                         cnt = count;
1754                 if (cnt <= 0) {
1755                         unsigned long tmo;
1756                         // There is data waiting to be played
1757                         /*
1758                          * Force the trigger setting since we would
1759                          * deadlock with it set any other way
1760                          */
1761                         dmabuf->trigger = PCM_ENABLE_OUTPUT;
1762                         i810_update_lvi(state,0);
1763                         if (file->f_flags & O_NONBLOCK) {
1764                                 if (!ret) ret = -EAGAIN;
1765                                 goto ret;
1766                         }
1767                         /* Not strictly correct but works */
1768                         tmo = (dmabuf->dmasize * HZ * 2) / (dmabuf->rate * 4);
1769                         /* There are two situations when sleep_on_timeout returns, one is when
1770                            the interrupt is serviced correctly and the process is waked up by
1771                            ISR ON TIME. Another is when timeout is expired, which means that
1772                            either interrupt is NOT serviced correctly (pending interrupt) or it
1773                            is TOO LATE for the process to be scheduled to run (scheduler latency)
1774                            which results in a (potential) buffer underrun. And worse, there is
1775                            NOTHING we can do to prevent it. */
1776                         if (!schedule_timeout(tmo >= 2 ? tmo : 2)) {
1777 #ifdef DEBUG
1778                                 printk(KERN_ERR "i810_audio: playback schedule timeout, "
1779                                        "dmasz %u fragsz %u count %i hwptr %u swptr %u\n",
1780                                        dmabuf->dmasize, dmabuf->fragsize, dmabuf->count,
1781                                        dmabuf->hwptr, dmabuf->swptr);
1782 #endif
1783                                 /* a buffer underrun, we delay the recovery until next time the
1784                                    while loop begin and we REALLY have data to play */
1785                                 //return ret;
1786                         }
1787                         if (signal_pending(current)) {
1788                                 if (!ret) ret = -ERESTARTSYS;
1789                                 goto ret;
1790                         }
1791                         continue;
1792                 }
1793                 if (copy_from_user(dmabuf->rawbuf+swptr,buffer,cnt)) {
1794                         if (!ret) ret = -EFAULT;
1795                         goto ret;
1796                 }
1797
1798                 swptr = MODULOP2(swptr + cnt, dmabuf->dmasize);
1799
1800                 spin_lock_irqsave(&state->card->lock, flags);
1801                 if (PM_SUSPENDED(card)) {
1802                         spin_unlock_irqrestore(&card->lock, flags);
1803                         continue;
1804                 }
1805
1806                 dmabuf->swptr = swptr;
1807                 pending = dmabuf->count += cnt;
1808
1809                 count -= cnt;
1810                 buffer += cnt;
1811                 ret += cnt;
1812                 spin_unlock_irqrestore(&state->card->lock, flags);
1813         }
1814 ret:
1815         if (dmabuf->enable || pending >= dmabuf->userfragsize)
1816                 i810_update_lvi(state, 0);
1817         set_current_state(TASK_RUNNING);
1818         remove_wait_queue(&dmabuf->wait, &waita);
1819
1820         return ret;
1821 }
1822
1823 /* No kernel lock - we have our own spinlock */
1824 static unsigned int i810_poll(struct file *file, struct poll_table_struct *wait)
1825 {
1826         struct i810_state *state = (struct i810_state *)file->private_data;
1827         struct dmabuf *dmabuf = &state->dmabuf;
1828         unsigned long flags;
1829         unsigned int mask = 0;
1830
1831         if(!dmabuf->ready)
1832                 return 0;
1833         poll_wait(file, &dmabuf->wait, wait);
1834         spin_lock_irqsave(&state->card->lock, flags);
1835         if (dmabuf->enable & ADC_RUNNING ||
1836             dmabuf->trigger & PCM_ENABLE_INPUT) {
1837                 if (i810_get_available_read_data(state) >=
1838                     (signed)dmabuf->userfragsize)
1839                         mask |= POLLIN | POLLRDNORM;
1840         }
1841         if (dmabuf->enable & DAC_RUNNING ||
1842             dmabuf->trigger & PCM_ENABLE_OUTPUT) {
1843                 if (i810_get_free_write_space(state) >=
1844                     (signed)dmabuf->userfragsize)
1845                         mask |= POLLOUT | POLLWRNORM;
1846         }
1847         spin_unlock_irqrestore(&state->card->lock, flags);
1848         return mask;
1849 }
1850
1851 static int i810_mmap(struct file *file, struct vm_area_struct *vma)
1852 {
1853         struct i810_state *state = (struct i810_state *)file->private_data;
1854         struct dmabuf *dmabuf = &state->dmabuf;
1855         int ret = -EINVAL;
1856         unsigned long size;
1857
1858         lock_kernel();
1859         if (vma->vm_flags & VM_WRITE) {
1860                 if (!dmabuf->write_channel &&
1861                     (dmabuf->write_channel =
1862                      state->card->alloc_pcm_channel(state->card)) == NULL) {
1863                         ret = -EBUSY;
1864                         goto out;
1865                 }
1866         }
1867         if (vma->vm_flags & VM_READ) {
1868                 if (!dmabuf->read_channel &&
1869                     (dmabuf->read_channel =
1870                      state->card->alloc_rec_pcm_channel(state->card)) == NULL) {
1871                         ret = -EBUSY;
1872                         goto out;
1873                 }
1874         }
1875         if ((ret = prog_dmabuf(state, 0)) != 0)
1876                 goto out;
1877
1878         ret = -EINVAL;
1879         if (vma->vm_pgoff != 0)
1880                 goto out;
1881         size = vma->vm_end - vma->vm_start;
1882         if (size > (PAGE_SIZE << dmabuf->buforder))
1883                 goto out;
1884         ret = -EAGAIN;
1885         if (remap_pfn_range(vma, vma->vm_start,
1886                              virt_to_phys(dmabuf->rawbuf) >> PAGE_SHIFT,
1887                              size, vma->vm_page_prot))
1888                 goto out;
1889         dmabuf->mapped = 1;
1890         dmabuf->trigger = 0;
1891         ret = 0;
1892 #ifdef DEBUG_MMAP
1893         printk("i810_audio: mmap'ed %ld bytes of data space\n", size);
1894 #endif
1895 out:
1896         unlock_kernel();
1897         return ret;
1898 }
1899
1900 static int i810_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
1901 {
1902         struct i810_state *state = (struct i810_state *)file->private_data;
1903         struct i810_channel *c = NULL;
1904         struct dmabuf *dmabuf = &state->dmabuf;
1905         unsigned long flags;
1906         audio_buf_info abinfo;
1907         count_info cinfo;
1908         unsigned int i_glob_cnt;
1909         int val = 0, ret;
1910         struct ac97_codec *codec = state->card->ac97_codec[0];
1911         void __user *argp = (void __user *)arg;
1912         int __user *p = argp;
1913
1914 #ifdef DEBUG
1915         printk("i810_audio: i810_ioctl, arg=0x%x, cmd=", arg ? *p : 0);
1916 #endif
1917
1918         switch (cmd)
1919         {
1920         case OSS_GETVERSION:
1921 #ifdef DEBUG
1922                 printk("OSS_GETVERSION\n");
1923 #endif
1924                 return put_user(SOUND_VERSION, p);
1925
1926         case SNDCTL_DSP_RESET:
1927 #ifdef DEBUG
1928                 printk("SNDCTL_DSP_RESET\n");
1929 #endif
1930                 spin_lock_irqsave(&state->card->lock, flags);
1931                 if (dmabuf->enable == DAC_RUNNING) {
1932                         c = dmabuf->write_channel;
1933                         __stop_dac(state);
1934                 }
1935                 if (dmabuf->enable == ADC_RUNNING) {
1936                         c = dmabuf->read_channel;
1937                         __stop_adc(state);
1938                 }
1939                 if (c != NULL) {
1940                         I810_IOWRITEB(2, state->card, c->port+OFF_CR);   /* reset DMA machine */
1941                         while ( I810_IOREADB(state->card, c->port+OFF_CR) & 2 )
1942                                 cpu_relax();
1943                         I810_IOWRITEL((u32)state->card->chandma +
1944                             c->num*sizeof(struct i810_channel),
1945                             state->card, c->port+OFF_BDBAR);
1946                         CIV_TO_LVI(state->card, c->port, 0);
1947                 }
1948
1949                 spin_unlock_irqrestore(&state->card->lock, flags);
1950                 synchronize_irq(state->card->pci_dev->irq);
1951                 dmabuf->ready = 0;
1952                 dmabuf->swptr = dmabuf->hwptr = 0;
1953                 dmabuf->count = dmabuf->total_bytes = 0;
1954                 return 0;
1955
1956         case SNDCTL_DSP_SYNC:
1957 #ifdef DEBUG
1958                 printk("SNDCTL_DSP_SYNC\n");
1959 #endif
1960                 if (dmabuf->enable != DAC_RUNNING || file->f_flags & O_NONBLOCK)
1961                         return 0;
1962                 if((val = drain_dac(state, 1)))
1963                         return val;
1964                 dmabuf->total_bytes = 0;
1965                 return 0;
1966
1967         case SNDCTL_DSP_SPEED: /* set smaple rate */
1968 #ifdef DEBUG
1969                 printk("SNDCTL_DSP_SPEED\n");
1970 #endif
1971                 if (get_user(val, p))
1972                         return -EFAULT;
1973                 if (val >= 0) {
1974                         if (file->f_mode & FMODE_WRITE) {
1975                                 if ( (state->card->ac97_status & SPDIF_ON) ) {  /* S/PDIF Enabled */
1976                                         /* AD1886 only supports 48000, need to check that */
1977                                         if ( i810_valid_spdif_rate ( codec, val ) ) {
1978                                                 /* Set DAC rate */
1979                                                 i810_set_spdif_output ( state, -1, 0 );
1980                                                 stop_dac(state);
1981                                                 dmabuf->ready = 0;
1982                                                 spin_lock_irqsave(&state->card->lock, flags);
1983                                                 i810_set_dac_rate(state, val);
1984                                                 spin_unlock_irqrestore(&state->card->lock, flags);
1985                                                 /* Set S/PDIF transmitter rate. */
1986                                                 i810_set_spdif_output ( state, AC97_EA_SPSA_3_4, val );
1987                                                 if ( ! (state->card->ac97_status & SPDIF_ON) ) {
1988                                                         val = dmabuf->rate;
1989                                                 }
1990                                         } else { /* Not a valid rate for S/PDIF, ignore it */
1991                                                 val = dmabuf->rate;
1992                                         }
1993                                 } else {
1994                                         stop_dac(state);
1995                                         dmabuf->ready = 0;
1996                                         spin_lock_irqsave(&state->card->lock, flags);
1997                                         i810_set_dac_rate(state, val);
1998                                         spin_unlock_irqrestore(&state->card->lock, flags);
1999                                 }
2000                         }
2001                         if (file->f_mode & FMODE_READ) {
2002                                 stop_adc(state);
2003                                 dmabuf->ready = 0;
2004                                 spin_lock_irqsave(&state->card->lock, flags);
2005                                 i810_set_adc_rate(state, val);
2006                                 spin_unlock_irqrestore(&state->card->lock, flags);
2007                         }
2008                 }
2009                 return put_user(dmabuf->rate, p);
2010
2011         case SNDCTL_DSP_STEREO: /* set stereo or mono channel */
2012 #ifdef DEBUG
2013                 printk("SNDCTL_DSP_STEREO\n");
2014 #endif
2015                 if (dmabuf->enable & DAC_RUNNING) {
2016                         stop_dac(state);
2017                 }
2018                 if (dmabuf->enable & ADC_RUNNING) {
2019                         stop_adc(state);
2020                 }
2021                 return put_user(1, p);
2022
2023         case SNDCTL_DSP_GETBLKSIZE:
2024                 if (file->f_mode & FMODE_WRITE) {
2025                         if (!dmabuf->ready && (val = prog_dmabuf(state, 0)))
2026                                 return val;
2027                 }
2028                 if (file->f_mode & FMODE_READ) {
2029                         if (!dmabuf->ready && (val = prog_dmabuf(state, 1)))
2030                                 return val;
2031                 }
2032 #ifdef DEBUG
2033                 printk("SNDCTL_DSP_GETBLKSIZE %d\n", dmabuf->userfragsize);
2034 #endif
2035                 return put_user(dmabuf->userfragsize, p);
2036
2037         case SNDCTL_DSP_GETFMTS: /* Returns a mask of supported sample format*/
2038 #ifdef DEBUG
2039                 printk("SNDCTL_DSP_GETFMTS\n");
2040 #endif
2041                 return put_user(AFMT_S16_LE, p);
2042
2043         case SNDCTL_DSP_SETFMT: /* Select sample format */
2044 #ifdef DEBUG
2045                 printk("SNDCTL_DSP_SETFMT\n");
2046 #endif
2047                 return put_user(AFMT_S16_LE, p);
2048
2049         case SNDCTL_DSP_CHANNELS:
2050 #ifdef DEBUG
2051                 printk("SNDCTL_DSP_CHANNELS\n");
2052 #endif
2053                 if (get_user(val, p))
2054                         return -EFAULT;
2055
2056                 if (val > 0) {
2057                         if (dmabuf->enable & DAC_RUNNING) {
2058                                 stop_dac(state);
2059                         }
2060                         if (dmabuf->enable & ADC_RUNNING) {
2061                                 stop_adc(state);
2062                         }
2063                 } else {
2064                         return put_user(state->card->channels, p);
2065                 }
2066
2067                 /* ICH and ICH0 only support 2 channels */
2068                 if ( state->card->pci_id == PCI_DEVICE_ID_INTEL_82801AA_5
2069                      || state->card->pci_id == PCI_DEVICE_ID_INTEL_82801AB_5)
2070                         return put_user(2, p);
2071
2072                 /* Multi-channel support was added with ICH2. Bits in */
2073                 /* Global Status and Global Control register are now  */
2074                 /* used to indicate this.                             */
2075
2076                 i_glob_cnt = I810_IOREADL(state->card, GLOB_CNT);
2077
2078                 /* Current # of channels enabled */
2079                 if ( i_glob_cnt & 0x0100000 )
2080                         ret = 4;
2081                 else if ( i_glob_cnt & 0x0200000 )
2082                         ret = 6;
2083                 else
2084                         ret = 2;
2085
2086                 switch ( val ) {
2087                         case 2: /* 2 channels is always supported */
2088                                 I810_IOWRITEL(i_glob_cnt & 0xffcfffff,
2089                                      state->card, GLOB_CNT);
2090                                 /* Do we need to change mixer settings????  */
2091                                 break;
2092                         case 4: /* Supported on some chipsets, better check first */
2093                                 if ( state->card->channels >= 4 ) {
2094                                         I810_IOWRITEL((i_glob_cnt & 0xffcfffff) | 0x100000,
2095                                               state->card, GLOB_CNT);
2096                                         /* Do we need to change mixer settings??? */
2097                                 } else {
2098                                         val = ret;
2099                                 }
2100                                 break;
2101                         case 6: /* Supported on some chipsets, better check first */
2102                                 if ( state->card->channels >= 6 ) {
2103                                         I810_IOWRITEL((i_glob_cnt & 0xffcfffff) | 0x200000,
2104                                               state->card, GLOB_CNT);
2105                                         /* Do we need to change mixer settings??? */
2106                                 } else {
2107                                         val = ret;
2108                                 }
2109                                 break;
2110                         default: /* nothing else is ever supported by the chipset */
2111                                 val = ret;
2112                                 break;
2113                 }
2114
2115                 return put_user(val, p);
2116
2117         case SNDCTL_DSP_POST: /* the user has sent all data and is notifying us */
2118                 /* we update the swptr to the end of the last sg segment then return */
2119 #ifdef DEBUG
2120                 printk("SNDCTL_DSP_POST\n");
2121 #endif
2122                 if(!dmabuf->ready || (dmabuf->enable != DAC_RUNNING))
2123                         return 0;
2124                 if((dmabuf->swptr % dmabuf->fragsize) != 0) {
2125                         val = dmabuf->fragsize - (dmabuf->swptr % dmabuf->fragsize);
2126                         dmabuf->swptr += val;
2127                         dmabuf->count += val;
2128                 }
2129                 return 0;
2130
2131         case SNDCTL_DSP_SUBDIVIDE:
2132                 if (dmabuf->subdivision)
2133                         return -EINVAL;
2134                 if (get_user(val, p))
2135                         return -EFAULT;
2136                 if (val != 1 && val != 2 && val != 4)
2137                         return -EINVAL;
2138 #ifdef DEBUG
2139                 printk("SNDCTL_DSP_SUBDIVIDE %d\n", val);
2140 #endif
2141                 dmabuf->subdivision = val;
2142                 dmabuf->ready = 0;
2143                 return 0;
2144
2145         case SNDCTL_DSP_SETFRAGMENT:
2146                 if (get_user(val, p))
2147                         return -EFAULT;
2148
2149                 dmabuf->ossfragsize = 1<<(val & 0xffff);
2150                 dmabuf->ossmaxfrags = (val >> 16) & 0xffff;
2151                 if (!dmabuf->ossfragsize || !dmabuf->ossmaxfrags)
2152                         return -EINVAL;
2153                 /*
2154                  * Bound the frag size into our allowed range of 256 - 4096
2155                  */
2156                 if (dmabuf->ossfragsize < 256)
2157                         dmabuf->ossfragsize = 256;
2158                 else if (dmabuf->ossfragsize > 4096)
2159                         dmabuf->ossfragsize = 4096;
2160                 /*
2161                  * The numfrags could be something reasonable, or it could
2162                  * be 0xffff meaning "Give me as much as possible".  So,
2163                  * we check the numfrags * fragsize doesn't exceed our
2164                  * 64k buffer limit, nor is it less than our 8k minimum.
2165                  * If it fails either one of these checks, then adjust the
2166                  * number of fragments, not the size of them.  It's OK if
2167                  * our number of fragments doesn't equal 32 or anything
2168                  * like our hardware based number now since we are using
2169                  * a different frag count for the hardware.  Before we get
2170                  * into this though, bound the maxfrags to avoid overflow
2171                  * issues.  A reasonable bound would be 64k / 256 since our
2172                  * maximum buffer size is 64k and our minimum frag size is
2173                  * 256.  On the other end, our minimum buffer size is 8k and
2174                  * our maximum frag size is 4k, so the lower bound should
2175                  * be 2.
2176                  */
2177
2178                 if(dmabuf->ossmaxfrags > 256)
2179                         dmabuf->ossmaxfrags = 256;
2180                 else if (dmabuf->ossmaxfrags < 2)
2181                         dmabuf->ossmaxfrags = 2;
2182
2183                 val = dmabuf->ossfragsize * dmabuf->ossmaxfrags;
2184                 while (val < 8192) {
2185                     val <<= 1;
2186                     dmabuf->ossmaxfrags <<= 1;
2187                 }
2188                 while (val > 65536) {
2189                     val >>= 1;
2190                     dmabuf->ossmaxfrags >>= 1;
2191                 }
2192                 dmabuf->ready = 0;
2193 #ifdef DEBUG
2194                 printk("SNDCTL_DSP_SETFRAGMENT 0x%x, %d, %d\n", val,
2195                         dmabuf->ossfragsize, dmabuf->ossmaxfrags);
2196 #endif
2197
2198                 return 0;
2199
2200         case SNDCTL_DSP_GETOSPACE:
2201                 if (!(file->f_mode & FMODE_WRITE))
2202                         return -EINVAL;
2203                 if (!dmabuf->ready && (val = prog_dmabuf(state, 0)) != 0)
2204                         return val;
2205                 spin_lock_irqsave(&state->card->lock, flags);
2206                 i810_update_ptr(state);
2207                 abinfo.fragsize = dmabuf->userfragsize;
2208                 abinfo.fragstotal = dmabuf->userfrags;
2209                 if (dmabuf->mapped)
2210                         abinfo.bytes = dmabuf->dmasize;
2211                 else
2212                         abinfo.bytes = i810_get_free_write_space(state);
2213                 abinfo.fragments = abinfo.bytes / dmabuf->userfragsize;
2214                 spin_unlock_irqrestore(&state->card->lock, flags);
2215 #if defined(DEBUG) || defined(DEBUG_MMAP)
2216                 printk("SNDCTL_DSP_GETOSPACE %d, %d, %d, %d\n", abinfo.bytes,
2217                         abinfo.fragsize, abinfo.fragments, abinfo.fragstotal);
2218 #endif
2219                 return copy_to_user(argp, &abinfo, sizeof(abinfo)) ? -EFAULT : 0;
2220
2221         case SNDCTL_DSP_GETOPTR:
2222                 if (!(file->f_mode & FMODE_WRITE))
2223                         return -EINVAL;
2224                 if (!dmabuf->ready && (val = prog_dmabuf(state, 0)) != 0)
2225                         return val;
2226                 spin_lock_irqsave(&state->card->lock, flags);
2227                 val = i810_get_free_write_space(state);
2228                 cinfo.bytes = dmabuf->total_bytes;
2229                 cinfo.ptr = dmabuf->hwptr;
2230                 cinfo.blocks = val/dmabuf->userfragsize;
2231                 if (dmabuf->mapped && (dmabuf->trigger & PCM_ENABLE_OUTPUT)) {
2232                         dmabuf->count += val;
2233                         dmabuf->swptr = (dmabuf->swptr + val) % dmabuf->dmasize;
2234                         __i810_update_lvi(state, 0);
2235                 }
2236                 spin_unlock_irqrestore(&state->card->lock, flags);
2237 #if defined(DEBUG) || defined(DEBUG_MMAP)
2238                 printk("SNDCTL_DSP_GETOPTR %d, %d, %d, %d\n", cinfo.bytes,
2239                         cinfo.blocks, cinfo.ptr, dmabuf->count);
2240 #endif
2241                 return copy_to_user(argp, &cinfo, sizeof(cinfo)) ? -EFAULT : 0;
2242
2243         case SNDCTL_DSP_GETISPACE:
2244                 if (!(file->f_mode & FMODE_READ))
2245                         return -EINVAL;
2246                 if (!dmabuf->ready && (val = prog_dmabuf(state, 1)) != 0)
2247                         return val;
2248                 spin_lock_irqsave(&state->card->lock, flags);
2249                 abinfo.bytes = i810_get_available_read_data(state);
2250                 abinfo.fragsize = dmabuf->userfragsize;
2251                 abinfo.fragstotal = dmabuf->userfrags;
2252                 abinfo.fragments = abinfo.bytes / dmabuf->userfragsize;
2253                 spin_unlock_irqrestore(&state->card->lock, flags);
2254 #if defined(DEBUG) || defined(DEBUG_MMAP)
2255                 printk("SNDCTL_DSP_GETISPACE %d, %d, %d, %d\n", abinfo.bytes,
2256                         abinfo.fragsize, abinfo.fragments, abinfo.fragstotal);
2257 #endif
2258                 return copy_to_user(argp, &abinfo, sizeof(abinfo)) ? -EFAULT : 0;
2259
2260         case SNDCTL_DSP_GETIPTR:
2261                 if (!(file->f_mode & FMODE_READ))
2262                         return -EINVAL;
2263                 if (!dmabuf->ready && (val = prog_dmabuf(state, 0)) != 0)
2264                         return val;
2265                 spin_lock_irqsave(&state->card->lock, flags);
2266                 val = i810_get_available_read_data(state);
2267                 cinfo.bytes = dmabuf->total_bytes;
2268                 cinfo.blocks = val/dmabuf->userfragsize;
2269                 cinfo.ptr = dmabuf->hwptr;
2270                 if (dmabuf->mapped && (dmabuf->trigger & PCM_ENABLE_INPUT)) {
2271                         dmabuf->count -= val;
2272                         dmabuf->swptr = (dmabuf->swptr + val) % dmabuf->dmasize;
2273                         __i810_update_lvi(state, 1);
2274                 }
2275                 spin_unlock_irqrestore(&state->card->lock, flags);
2276 #if defined(DEBUG) || defined(DEBUG_MMAP)
2277                 printk("SNDCTL_DSP_GETIPTR %d, %d, %d, %d\n", cinfo.bytes,
2278                         cinfo.blocks, cinfo.ptr, dmabuf->count);
2279 #endif
2280                 return copy_to_user(argp, &cinfo, sizeof(cinfo)) ? -EFAULT : 0;
2281
2282         case SNDCTL_DSP_NONBLOCK:
2283 #ifdef DEBUG
2284                 printk("SNDCTL_DSP_NONBLOCK\n");
2285 #endif
2286                 file->f_flags |= O_NONBLOCK;
2287                 return 0;
2288
2289         case SNDCTL_DSP_GETCAPS:
2290 #ifdef DEBUG
2291                 printk("SNDCTL_DSP_GETCAPS\n");
2292 #endif
2293             return put_user(DSP_CAP_REALTIME|DSP_CAP_TRIGGER|DSP_CAP_MMAP|DSP_CAP_BIND,
2294                             p);
2295
2296         case SNDCTL_DSP_GETTRIGGER:
2297                 val = 0;
2298 #ifdef DEBUG
2299                 printk("SNDCTL_DSP_GETTRIGGER 0x%x\n", dmabuf->trigger);
2300 #endif
2301                 return put_user(dmabuf->trigger, p);
2302
2303         case SNDCTL_DSP_SETTRIGGER:
2304                 if (get_user(val, p))
2305                         return -EFAULT;
2306 #if defined(DEBUG) || defined(DEBUG_MMAP)
2307                 printk("SNDCTL_DSP_SETTRIGGER 0x%x\n", val);
2308 #endif
2309                 /* silently ignore invalid PCM_ENABLE_xxx bits,
2310                  * like the other drivers do
2311                  */
2312                 if (!(file->f_mode & FMODE_READ ))
2313                         val &= ~PCM_ENABLE_INPUT;
2314                 if (!(file->f_mode & FMODE_WRITE ))
2315                         val &= ~PCM_ENABLE_OUTPUT;
2316                 if((file->f_mode & FMODE_READ) && !(val & PCM_ENABLE_INPUT) && dmabuf->enable == ADC_RUNNING) {
2317                         stop_adc(state);
2318                 }
2319                 if((file->f_mode & FMODE_WRITE) && !(val & PCM_ENABLE_OUTPUT) && dmabuf->enable == DAC_RUNNING) {
2320                         stop_dac(state);
2321                 }
2322                 dmabuf->trigger = val;
2323                 if((val & PCM_ENABLE_OUTPUT) && !(dmabuf->enable & DAC_RUNNING)) {
2324                         if (!dmabuf->write_channel) {
2325                                 dmabuf->ready = 0;
2326                                 dmabuf->write_channel = state->card->alloc_pcm_channel(state->card);
2327                                 if (!dmabuf->write_channel)
2328                                         return -EBUSY;
2329                         }
2330                         if (!dmabuf->ready && (ret = prog_dmabuf(state, 0)))
2331                                 return ret;
2332                         if (dmabuf->mapped) {
2333                                 spin_lock_irqsave(&state->card->lock, flags);
2334                                 i810_update_ptr(state);
2335                                 dmabuf->count = 0;
2336                                 dmabuf->swptr = dmabuf->hwptr;
2337                                 dmabuf->count = i810_get_free_write_space(state);
2338                                 dmabuf->swptr = (dmabuf->swptr + dmabuf->count) % dmabuf->dmasize;
2339                                 spin_unlock_irqrestore(&state->card->lock, flags);
2340                         }
2341                         i810_update_lvi(state, 0);
2342                         start_dac(state);
2343                 }
2344                 if((val & PCM_ENABLE_INPUT) && !(dmabuf->enable & ADC_RUNNING)) {
2345                         if (!dmabuf->read_channel) {
2346                                 dmabuf->ready = 0;
2347                                 dmabuf->read_channel = state->card->alloc_rec_pcm_channel(state->card);
2348                                 if (!dmabuf->read_channel)
2349                                         return -EBUSY;
2350                         }
2351                         if (!dmabuf->ready && (ret = prog_dmabuf(state, 1)))
2352                                 return ret;
2353                         if (dmabuf->mapped) {
2354                                 spin_lock_irqsave(&state->card->lock, flags);
2355                                 i810_update_ptr(state);
2356                                 dmabuf->swptr = dmabuf->hwptr;
2357                                 dmabuf->count = 0;
2358                                 spin_unlock_irqrestore(&state->card->lock, flags);
2359                         }
2360                         i810_update_lvi(state, 1);
2361                         start_adc(state);
2362                 }
2363                 return 0;
2364
2365         case SNDCTL_DSP_SETDUPLEX:
2366 #ifdef DEBUG
2367                 printk("SNDCTL_DSP_SETDUPLEX\n");
2368 #endif
2369                 return -EINVAL;
2370
2371         case SNDCTL_DSP_GETODELAY:
2372                 if (!(file->f_mode & FMODE_WRITE))
2373                         return -EINVAL;
2374                 spin_lock_irqsave(&state->card->lock, flags);
2375                 i810_update_ptr(state);
2376                 val = dmabuf->count;
2377                 spin_unlock_irqrestore(&state->card->lock, flags);
2378 #ifdef DEBUG
2379                 printk("SNDCTL_DSP_GETODELAY %d\n", dmabuf->count);
2380 #endif
2381                 return put_user(val, p);
2382
2383         case SOUND_PCM_READ_RATE:
2384 #ifdef DEBUG
2385                 printk("SOUND_PCM_READ_RATE %d\n", dmabuf->rate);
2386 #endif
2387                 return put_user(dmabuf->rate, p);
2388
2389         case SOUND_PCM_READ_CHANNELS:
2390 #ifdef DEBUG
2391                 printk("SOUND_PCM_READ_CHANNELS\n");
2392 #endif
2393                 return put_user(2, p);
2394
2395         case SOUND_PCM_READ_BITS:
2396 #ifdef DEBUG
2397                 printk("SOUND_PCM_READ_BITS\n");
2398 #endif
2399                 return put_user(AFMT_S16_LE, p);
2400
2401         case SNDCTL_DSP_SETSPDIF: /* Set S/PDIF Control register */
2402 #ifdef DEBUG
2403                 printk("SNDCTL_DSP_SETSPDIF\n");
2404 #endif
2405                 if (get_user(val, p))
2406                         return -EFAULT;
2407
2408                 /* Check to make sure the codec supports S/PDIF transmitter */
2409
2410                 if((state->card->ac97_features & 4)) {
2411                         /* mask out the transmitter speed bits so the user can't set them */
2412                         val &= ~0x3000;
2413
2414                         /* Add the current transmitter speed bits to the passed value */
2415                         ret = i810_ac97_get(codec, AC97_SPDIF_CONTROL);
2416                         val |= (ret & 0x3000);
2417
2418                         i810_ac97_set(codec, AC97_SPDIF_CONTROL, val);
2419                         if(i810_ac97_get(codec, AC97_SPDIF_CONTROL) != val ) {
2420                                 printk(KERN_ERR "i810_audio: Unable to set S/PDIF configuration to 0x%04x.\n", val);
2421                                 return -EFAULT;
2422                         }
2423                 }
2424 #ifdef DEBUG
2425                 else
2426                         printk(KERN_WARNING "i810_audio: S/PDIF transmitter not avalible.\n");
2427 #endif
2428                 return put_user(val, p);
2429
2430         case SNDCTL_DSP_GETSPDIF: /* Get S/PDIF Control register */
2431 #ifdef DEBUG
2432                 printk("SNDCTL_DSP_GETSPDIF\n");
2433 #endif
2434                 if (get_user(val, p))
2435                         return -EFAULT;
2436
2437                 /* Check to make sure the codec supports S/PDIF transmitter */
2438
2439                 if(!(state->card->ac97_features & 4)) {
2440 #ifdef DEBUG
2441                         printk(KERN_WARNING "i810_audio: S/PDIF transmitter not avalible.\n");
2442 #endif
2443                         val = 0;
2444                 } else {
2445                         val = i810_ac97_get(codec, AC97_SPDIF_CONTROL);
2446                 }
2447                 //return put_user((val & 0xcfff), p);
2448                 return put_user(val, p);
2449
2450         case SNDCTL_DSP_GETCHANNELMASK:
2451 #ifdef DEBUG
2452                 printk("SNDCTL_DSP_GETCHANNELMASK\n");
2453 #endif
2454                 if (get_user(val, p))
2455                         return -EFAULT;
2456
2457                 /* Based on AC'97 DAC support, not ICH hardware */
2458                 val = DSP_BIND_FRONT;
2459                 if ( state->card->ac97_features & 0x0004 )
2460                         val |= DSP_BIND_SPDIF;
2461
2462                 if ( state->card->ac97_features & 0x0080 )
2463                         val |= DSP_BIND_SURR;
2464                 if ( state->card->ac97_features & 0x0140 )
2465                         val |= DSP_BIND_CENTER_LFE;
2466
2467                 return put_user(val, p);
2468
2469         case SNDCTL_DSP_BIND_CHANNEL:
2470 #ifdef DEBUG
2471                 printk("SNDCTL_DSP_BIND_CHANNEL\n");
2472 #endif
2473                 if (get_user(val, p))
2474                         return -EFAULT;
2475                 if ( val == DSP_BIND_QUERY ) {
2476                         val = DSP_BIND_FRONT; /* Always report this as being enabled */
2477                         if ( state->card->ac97_status & SPDIF_ON )
2478                                 val |= DSP_BIND_SPDIF;
2479                         else {
2480                                 if ( state->card->ac97_status & SURR_ON )
2481                                         val |= DSP_BIND_SURR;
2482                                 if ( state->card->ac97_status & CENTER_LFE_ON )
2483                                         val |= DSP_BIND_CENTER_LFE;
2484                         }
2485                 } else {  /* Not a query, set it */
2486                         if (!(file->f_mode & FMODE_WRITE))
2487                                 return -EINVAL;
2488                         if ( dmabuf->enable == DAC_RUNNING ) {
2489                                 stop_dac(state);
2490                         }
2491                         if ( val & DSP_BIND_SPDIF ) {  /* Turn on SPDIF */
2492                                 /*  Ok, this should probably define what slots
2493                                  *  to use. For now, we'll only set it to the
2494                                  *  defaults:
2495                                  *
2496                                  *   non multichannel codec maps to slots 3&4
2497                                  *   2 channel codec maps to slots 7&8
2498                                  *   4 channel codec maps to slots 6&9
2499                                  *   6 channel codec maps to slots 10&11
2500                                  *
2501                                  *  there should be some way for the app to
2502                                  *  select the slot assignment.
2503                                  */
2504
2505                                 i810_set_spdif_output ( state, AC97_EA_SPSA_3_4, dmabuf->rate );
2506                                 if ( !(state->card->ac97_status & SPDIF_ON) )
2507                                         val &= ~DSP_BIND_SPDIF;
2508                         } else {
2509                                 int mask;
2510                                 int channels;
2511
2512                                 /* Turn off S/PDIF if it was on */
2513                                 if ( state->card->ac97_status & SPDIF_ON )
2514                                         i810_set_spdif_output ( state, -1, 0 );
2515
2516                                 mask = val & (DSP_BIND_FRONT | DSP_BIND_SURR | DSP_BIND_CENTER_LFE);
2517                                 switch (mask) {
2518                                         case DSP_BIND_FRONT:
2519                                                 channels = 2;
2520                                                 break;
2521                                         case DSP_BIND_FRONT|DSP_BIND_SURR:
2522                                                 channels = 4;
2523                                                 break;
2524                                         case DSP_BIND_FRONT|DSP_BIND_SURR|DSP_BIND_CENTER_LFE:
2525                                                 channels = 6;
2526                                                 break;
2527                                         default:
2528                                                 val = DSP_BIND_FRONT;
2529                                                 channels = 2;
2530                                                 break;
2531                                 }
2532                                 i810_set_dac_channels ( state, channels );
2533
2534                                 /* check that they really got turned on */
2535                                 if (!(state->card->ac97_status & SURR_ON))
2536                                         val &= ~DSP_BIND_SURR;
2537                                 if (!(state->card->ac97_status & CENTER_LFE_ON))
2538                                         val &= ~DSP_BIND_CENTER_LFE;
2539                         }
2540                 }
2541                 return put_user(val, p);
2542
2543         case SNDCTL_DSP_MAPINBUF:
2544         case SNDCTL_DSP_MAPOUTBUF:
2545         case SNDCTL_DSP_SETSYNCRO:
2546         case SOUND_PCM_WRITE_FILTER:
2547         case SOUND_PCM_READ_FILTER:
2548 #ifdef DEBUG
2549                 printk("SNDCTL_* -EINVAL\n");
2550 #endif
2551                 return -EINVAL;
2552         }
2553         return -EINVAL;
2554 }
2555
2556 static int i810_open(struct inode *inode, struct file *file)
2557 {
2558         int i = 0;
2559         struct i810_card *card = devs;
2560         struct i810_state *state = NULL;
2561         struct dmabuf *dmabuf = NULL;
2562
2563         /* find an avaiable virtual channel (instance of /dev/dsp) */
2564         while (card != NULL) {
2565                 /*
2566                  * If we are initializing and then fail, card could go
2567                  * away unuexpectedly while we are in the for() loop.
2568                  * So, check for card on each iteration before we check
2569                  * for card->initializing to avoid a possible oops.
2570                  * This usually only matters for times when the driver is
2571                  * autoloaded by kmod.
2572                  */
2573                 for (i = 0; i < 50 && card && card->initializing; i++) {
2574                         set_current_state(TASK_UNINTERRUPTIBLE);
2575                         schedule_timeout(HZ/20);
2576                 }
2577                 for (i = 0; i < NR_HW_CH && card && !card->initializing; i++) {
2578                         if (card->states[i] == NULL) {
2579                                 state = card->states[i] = (struct i810_state *)
2580                                         kmalloc(sizeof(struct i810_state), GFP_KERNEL);
2581                                 if (state == NULL)
2582                                         return -ENOMEM;
2583                                 memset(state, 0, sizeof(struct i810_state));
2584                                 dmabuf = &state->dmabuf;
2585                                 goto found_virt;
2586                         }
2587                 }
2588                 card = card->next;
2589         }
2590         /* no more virtual channel avaiable */
2591         if (!state)
2592                 return -ENODEV;
2593
2594 found_virt:
2595         /* initialize the virtual channel */
2596         state->virt = i;
2597         state->card = card;
2598         state->magic = I810_STATE_MAGIC;
2599         init_waitqueue_head(&dmabuf->wait);
2600         init_MUTEX(&state->open_sem);
2601         file->private_data = state;
2602         dmabuf->trigger = 0;
2603
2604         /* allocate hardware channels */
2605         if(file->f_mode & FMODE_READ) {
2606                 if((dmabuf->read_channel = card->alloc_rec_pcm_channel(card)) == NULL) {
2607                         kfree (card->states[i]);
2608                         card->states[i] = NULL;
2609                         return -EBUSY;
2610                 }
2611                 dmabuf->trigger |= PCM_ENABLE_INPUT;
2612                 i810_set_adc_rate(state, 8000);
2613         }
2614         if(file->f_mode & FMODE_WRITE) {
2615                 if((dmabuf->write_channel = card->alloc_pcm_channel(card)) == NULL) {
2616                         /* make sure we free the record channel allocated above */
2617                         if(file->f_mode & FMODE_READ)
2618                                 card->free_pcm_channel(card,dmabuf->read_channel->num);
2619                         kfree (card->states[i]);
2620                         card->states[i] = NULL;
2621                         return -EBUSY;
2622                 }
2623                 /* Initialize to 8kHz?  What if we don't support 8kHz? */
2624                 /*  Let's change this to check for S/PDIF stuff */
2625
2626                 dmabuf->trigger |= PCM_ENABLE_OUTPUT;
2627                 if ( spdif_locked ) {
2628                         i810_set_dac_rate(state, spdif_locked);
2629                         i810_set_spdif_output(state, AC97_EA_SPSA_3_4, spdif_locked);
2630                 } else {
2631                         i810_set_dac_rate(state, 8000);
2632                         /* Put the ACLink in 2 channel mode by default */
2633                         i = I810_IOREADL(card, GLOB_CNT);
2634                         I810_IOWRITEL(i & 0xffcfffff, card, GLOB_CNT);
2635                 }
2636         }
2637
2638         /* set default sample format. According to OSS Programmer's Guide  /dev/dsp
2639            should be default to unsigned 8-bits, mono, with sample rate 8kHz and
2640            /dev/dspW will accept 16-bits sample, but we don't support those so we
2641            set it immediately to stereo and 16bit, which is all we do support */
2642         dmabuf->fmt |= I810_FMT_16BIT | I810_FMT_STEREO;
2643         dmabuf->ossfragsize = 0;
2644         dmabuf->ossmaxfrags  = 0;
2645         dmabuf->subdivision  = 0;
2646
2647         state->open_mode |= file->f_mode & (FMODE_READ | FMODE_WRITE);
2648
2649         return nonseekable_open(inode, file);
2650 }
2651
2652 static int i810_release(struct inode *inode, struct file *file)
2653 {
2654         struct i810_state *state = (struct i810_state *)file->private_data;
2655         struct i810_card *card = state->card;
2656         struct dmabuf *dmabuf = &state->dmabuf;
2657         unsigned long flags;
2658
2659         lock_kernel();
2660
2661         /* stop DMA state machine and free DMA buffers/channels */
2662         if(dmabuf->trigger & PCM_ENABLE_OUTPUT) {
2663                 drain_dac(state, 0);
2664         }
2665         if(dmabuf->trigger & PCM_ENABLE_INPUT) {
2666                 stop_adc(state);
2667         }
2668         spin_lock_irqsave(&card->lock, flags);
2669         dealloc_dmabuf(state);
2670         if (file->f_mode & FMODE_WRITE) {
2671                 state->card->free_pcm_channel(state->card, dmabuf->write_channel->num);
2672         }
2673         if (file->f_mode & FMODE_READ) {
2674                 state->card->free_pcm_channel(state->card, dmabuf->read_channel->num);
2675         }
2676
2677         state->card->states[state->virt] = NULL;
2678         kfree(state);
2679         spin_unlock_irqrestore(&card->lock, flags);
2680         unlock_kernel();
2681
2682         return 0;
2683 }
2684
2685 static /*const*/ struct file_operations i810_audio_fops = {
2686         .owner          = THIS_MODULE,
2687         .llseek         = no_llseek,
2688         .read           = i810_read,
2689         .write          = i810_write,
2690         .poll           = i810_poll,
2691         .ioctl          = i810_ioctl,
2692         .mmap           = i810_mmap,
2693         .open           = i810_open,
2694         .release        = i810_release,
2695 };
2696
2697 /* Write AC97 codec registers */
2698
2699 static u16 i810_ac97_get_mmio(struct ac97_codec *dev, u8 reg)
2700 {
2701         struct i810_card *card = dev->private_data;
2702         int count = 100;
2703         u16 reg_set = IO_REG_OFF(dev) | (reg&0x7f);
2704
2705         while(count-- && (readb(card->iobase_mmio + CAS) & 1))
2706                 udelay(1);
2707
2708 #ifdef DEBUG_MMIO
2709         {
2710                 u16 ans = readw(card->ac97base_mmio + reg_set);
2711                 printk(KERN_DEBUG "i810_audio: ac97_get_mmio(%d) -> 0x%04X\n", ((int) reg_set) & 0xffff, (u32) ans);
2712                 return ans;
2713         }
2714 #else
2715         return readw(card->ac97base_mmio + reg_set);
2716 #endif
2717 }
2718
2719 static u16 i810_ac97_get_io(struct ac97_codec *dev, u8 reg)
2720 {
2721         struct i810_card *card = dev->private_data;
2722         int count = 100;
2723         u16 reg_set = IO_REG_OFF(dev) | (reg&0x7f);
2724
2725         while(count-- && (I810_IOREADB(card, CAS) & 1))
2726                 udelay(1);
2727
2728         return inw(card->ac97base + reg_set);
2729 }
2730
2731 static void i810_ac97_set_mmio(struct ac97_codec *dev, u8 reg, u16 data)
2732 {
2733         struct i810_card *card = dev->private_data;
2734         int count = 100;
2735         u16 reg_set = IO_REG_OFF(dev) | (reg&0x7f);
2736
2737         while(count-- && (readb(card->iobase_mmio + CAS) & 1))
2738                 udelay(1);
2739
2740         writew(data, card->ac97base_mmio + reg_set);
2741
2742 #ifdef DEBUG_MMIO
2743         printk(KERN_DEBUG "i810_audio: ac97_set_mmio(0x%04X, %d)\n", (u32) data, ((int) reg_set) & 0xffff);
2744 #endif
2745 }
2746
2747 static void i810_ac97_set_io(struct ac97_codec *dev, u8 reg, u16 data)
2748 {
2749         struct i810_card *card = dev->private_data;
2750         int count = 100;
2751         u16 reg_set = IO_REG_OFF(dev) | (reg&0x7f);
2752
2753         while(count-- && (I810_IOREADB(card, CAS) & 1))
2754                 udelay(1);
2755
2756         outw(data, card->ac97base + reg_set);
2757 }
2758
2759 static u16 i810_ac97_get(struct ac97_codec *dev, u8 reg)
2760 {
2761         struct i810_card *card = dev->private_data;
2762         u16 ret;
2763
2764         spin_lock(&card->ac97_lock);
2765         if (card->use_mmio) {
2766                 ret = i810_ac97_get_mmio(dev, reg);
2767         }
2768         else {
2769                 ret = i810_ac97_get_io(dev, reg);
2770         }
2771         spin_unlock(&card->ac97_lock);
2772
2773         return ret;
2774 }
2775
2776 static void i810_ac97_set(struct ac97_codec *dev, u8 reg, u16 data)
2777 {
2778         struct i810_card *card = dev->private_data;
2779
2780         spin_lock(&card->ac97_lock);
2781         if (card->use_mmio) {
2782                 i810_ac97_set_mmio(dev, reg, data);
2783         }
2784         else {
2785                 i810_ac97_set_io(dev, reg, data);
2786         }
2787         spin_unlock(&card->ac97_lock);
2788 }
2789
2790
2791 /* OSS /dev/mixer file operation methods */
2792
2793 static int i810_open_mixdev(struct inode *inode, struct file *file)
2794 {
2795         int i;
2796         int minor = iminor(inode);
2797         struct i810_card *card = devs;
2798
2799         for (card = devs; card != NULL; card = card->next) {
2800                 /*
2801                  * If we are initializing and then fail, card could go
2802                  * away unuexpectedly while we are in the for() loop.
2803                  * So, check for card on each iteration before we check
2804                  * for card->initializing to avoid a possible oops.
2805                  * This usually only matters for times when the driver is
2806                  * autoloaded by kmod.
2807                  */
2808                 for (i = 0; i < 50 && card && card->initializing; i++) {
2809                         set_current_state(TASK_UNINTERRUPTIBLE);
2810                         schedule_timeout(HZ/20);
2811                 }
2812                 for (i = 0; i < NR_AC97 && card && !card->initializing; i++)
2813                         if (card->ac97_codec[i] != NULL &&
2814                             card->ac97_codec[i]->dev_mixer == minor) {
2815                                 file->private_data = card->ac97_codec[i];
2816                                 return nonseekable_open(inode, file);
2817                         }
2818         }
2819         return -ENODEV;
2820 }
2821
2822 static int i810_ioctl_mixdev(struct inode *inode, struct file *file, unsigned int cmd,
2823                                 unsigned long arg)
2824 {
2825         struct ac97_codec *codec = (struct ac97_codec *)file->private_data;
2826
2827         return codec->mixer_ioctl(codec, cmd, arg);
2828 }
2829
2830 static /*const*/ struct file_operations i810_mixer_fops = {
2831         .owner          = THIS_MODULE,
2832         .llseek         = no_llseek,
2833         .ioctl          = i810_ioctl_mixdev,
2834         .open           = i810_open_mixdev,
2835 };
2836
2837 /* AC97 codec initialisation.  These small functions exist so we don't
2838    duplicate code between module init and apm resume */
2839
2840 static inline int i810_ac97_exists(struct i810_card *card, int ac97_number)
2841 {
2842         u32 reg = I810_IOREADL(card, GLOB_STA);
2843         switch (ac97_number) {
2844         case 0:
2845                 return reg & (1<<8);
2846         case 1:
2847                 return reg & (1<<9);
2848         case 2:
2849                 return reg & (1<<28);
2850         }
2851         return 0;
2852 }
2853
2854 static inline int i810_ac97_enable_variable_rate(struct ac97_codec *codec)
2855 {
2856         i810_ac97_set(codec, AC97_EXTENDED_STATUS, 9);
2857         i810_ac97_set(codec,AC97_EXTENDED_STATUS,
2858                       i810_ac97_get(codec, AC97_EXTENDED_STATUS)|0xE800);
2859
2860         return (i810_ac97_get(codec, AC97_EXTENDED_STATUS)&1);
2861 }
2862
2863
2864 static int i810_ac97_probe_and_powerup(struct i810_card *card,struct ac97_codec *codec)
2865 {
2866         /* Returns 0 on failure */
2867         int i;
2868
2869         if (ac97_probe_codec(codec) == 0) return 0;
2870
2871         /* power it all up */
2872         i810_ac97_set(codec, AC97_POWER_CONTROL,
2873                       i810_ac97_get(codec, AC97_POWER_CONTROL) & ~0x7f00);
2874
2875         /* wait for analog ready */
2876         for (i=100; i && ((i810_ac97_get(codec, AC97_POWER_CONTROL) & 0xf) != 0xf); i--)
2877         {
2878                 set_current_state(TASK_UNINTERRUPTIBLE);
2879                 schedule_timeout(HZ/20);
2880         }
2881         return i;
2882 }
2883
2884 static int is_new_ich(u16 pci_id)
2885 {
2886         switch (pci_id) {
2887         case PCI_DEVICE_ID_INTEL_82801DB_5:
2888         case PCI_DEVICE_ID_INTEL_82801EB_5:
2889         case PCI_DEVICE_ID_INTEL_ESB_5:
2890         case PCI_DEVICE_ID_INTEL_ICH6_18:
2891                 return 1;
2892         default:
2893                 break;
2894         }
2895
2896         return 0;
2897 }
2898
2899 static inline int ich_use_mmio(struct i810_card *card)
2900 {
2901         return is_new_ich(card->pci_id) && card->use_mmio;
2902 }
2903
2904 /**
2905  *      i810_ac97_power_up_bus  -       bring up AC97 link
2906  *      @card : ICH audio device to power up
2907  *
2908  *      Bring up the ACLink AC97 codec bus
2909  */
2910
2911 static int i810_ac97_power_up_bus(struct i810_card *card)
2912 {
2913         u32 reg = I810_IOREADL(card, GLOB_CNT);
2914         int i;
2915         int primary_codec_id = 0;
2916
2917         if((reg&2)==0)  /* Cold required */
2918                 reg|=2;
2919         else
2920                 reg|=4; /* Warm */
2921
2922         reg&=~8;        /* ACLink on */
2923
2924         /* At this point we deassert AC_RESET # */
2925         I810_IOWRITEL(reg , card, GLOB_CNT);
2926
2927         /* We must now allow time for the Codec initialisation.
2928            600mS is the specified time */
2929
2930         for(i=0;i<10;i++)
2931         {
2932                 if((I810_IOREADL(card, GLOB_CNT)&4)==0)
2933                         break;
2934
2935                 set_current_state(TASK_UNINTERRUPTIBLE);
2936                 schedule_timeout(HZ/20);
2937         }
2938         if(i==10)
2939         {
2940                 printk(KERN_ERR "i810_audio: AC'97 reset failed.\n");
2941                 return 0;
2942         }
2943
2944         set_current_state(TASK_UNINTERRUPTIBLE);
2945         schedule_timeout(HZ/2);
2946
2947         /*
2948          *      See if the primary codec comes ready. This must happen
2949          *      before we start doing DMA stuff
2950          */
2951         /* see i810_ac97_init for the next 10 lines (jsaw) */
2952         if (card->use_mmio)
2953                 readw(card->ac97base_mmio);
2954         else
2955                 inw(card->ac97base);
2956         if (ich_use_mmio(card)) {
2957                 primary_codec_id = (int) readl(card->iobase_mmio + SDM) & 0x3;
2958                 printk(KERN_INFO "i810_audio: Primary codec has ID %d\n",
2959                        primary_codec_id);
2960         }
2961
2962         if(! i810_ac97_exists(card, primary_codec_id))
2963         {
2964                 printk(KERN_INFO "i810_audio: Codec not ready.. wait.. ");
2965                 set_current_state(TASK_UNINTERRUPTIBLE);
2966                 schedule_timeout(HZ);   /* actually 600mS by the spec */
2967
2968                 if(i810_ac97_exists(card, primary_codec_id))
2969                         printk("OK\n");
2970                 else
2971                         printk("no response.\n");
2972         }
2973         if (card->use_mmio)
2974                 readw(card->ac97base_mmio);
2975         else
2976                 inw(card->ac97base);
2977         return 1;
2978 }
2979
2980 static int __devinit i810_ac97_init(struct i810_card *card)
2981 {
2982         int num_ac97 = 0;
2983         int ac97_id;
2984         int total_channels = 0;
2985         int nr_ac97_max = card_cap[card->pci_id_internal].nr_ac97;
2986         struct ac97_codec *codec;
2987         u16 eid;
2988         u32 reg;
2989
2990         if(!i810_ac97_power_up_bus(card)) return 0;
2991
2992         /* Number of channels supported */
2993         /* What about the codec?  Just because the ICH supports */
2994         /* multiple channels doesn't mean the codec does.       */
2995         /* we'll have to modify this in the codec section below */
2996         /* to reflect what the codec has.                       */
2997         /* ICH and ICH0 only support 2 channels so don't bother */
2998         /* to check....                                         */
2999
3000         card->channels = 2;
3001         reg = I810_IOREADL(card, GLOB_STA);
3002         if ( reg & 0x0200000 )
3003                 card->channels = 6;
3004         else if ( reg & 0x0100000 )
3005                 card->channels = 4;
3006         printk(KERN_INFO "i810_audio: Audio Controller supports %d channels.\n", card->channels);
3007         printk(KERN_INFO "i810_audio: Defaulting to base 2 channel mode.\n");
3008         reg = I810_IOREADL(card, GLOB_CNT);
3009         I810_IOWRITEL(reg & 0xffcfffff, card, GLOB_CNT);
3010
3011         for (num_ac97 = 0; num_ac97 < NR_AC97; num_ac97++)
3012                 card->ac97_codec[num_ac97] = NULL;
3013
3014         /*@FIXME I don't know, if I'm playing to safe here... (jsaw) */
3015         if ((nr_ac97_max > 2) && !card->use_mmio) nr_ac97_max = 2;
3016
3017         for (num_ac97 = 0; num_ac97 < nr_ac97_max; num_ac97++) {
3018                 /* codec reset */
3019                 printk(KERN_INFO "i810_audio: Resetting connection %d\n", num_ac97);
3020                 if (card->use_mmio)
3021                         readw(card->ac97base_mmio + 0x80*num_ac97);
3022                 else
3023                         inw(card->ac97base + 0x80*num_ac97);
3024
3025                 /* If we have the SDATA_IN Map Register, as on ICH4, we
3026                    do not loop thru all possible codec IDs but thru all
3027                    possible IO channels. Bit 0:1 of SDM then holds the
3028                    last codec ID spoken to.
3029                 */
3030                 if (ich_use_mmio(card)) {
3031                         ac97_id = (int) readl(card->iobase_mmio + SDM) & 0x3;
3032                         printk(KERN_INFO "i810_audio: Connection %d with codec id %d\n",
3033                                num_ac97, ac97_id);
3034                 }
3035                 else {
3036                         ac97_id = num_ac97;
3037                 }
3038
3039                 /* The ICH programmer's reference says you should   */
3040                 /* check the ready status before probing. So we chk */
3041                 /*   What do we do if it's not ready?  Wait and try */
3042                 /*   again, or abort?                               */
3043                 if (!i810_ac97_exists(card, ac97_id)) {
3044                         if(num_ac97 == 0)
3045                                 printk(KERN_ERR "i810_audio: Primary codec not ready.\n");
3046                 }
3047
3048                 if ((codec = ac97_alloc_codec()) == NULL)
3049                         return -ENOMEM;
3050
3051                 /* initialize some basic codec information, other fields will be filled
3052                    in ac97_probe_codec */
3053                 codec->private_data = card;
3054                 codec->id = ac97_id;
3055                 card->ac97_id_map[ac97_id] = num_ac97 * 0x80;
3056
3057                 if (card->use_mmio) {
3058                         codec->codec_read = i810_ac97_get_mmio;
3059                         codec->codec_write = i810_ac97_set_mmio;
3060                 }
3061                 else {
3062                         codec->codec_read = i810_ac97_get_io;
3063                         codec->codec_write = i810_ac97_set_io;
3064                 }
3065
3066                 if(!i810_ac97_probe_and_powerup(card,codec)) {
3067                         printk(KERN_ERR "i810_audio: timed out waiting for codec %d analog ready.\n", ac97_id);
3068                         ac97_release_codec(codec);
3069                         break;  /* it didn't work */
3070                 }
3071                 /* Store state information about S/PDIF transmitter */
3072                 card->ac97_status = 0;
3073
3074                 /* Don't attempt to get eid until powerup is complete */
3075                 eid = i810_ac97_get(codec, AC97_EXTENDED_ID);
3076
3077                 if(eid==0xFFFF)
3078                 {
3079                         printk(KERN_WARNING "i810_audio: no codec attached ?\n");
3080                         ac97_release_codec(codec);
3081                         break;
3082                 }
3083
3084                 /* Check for an AC97 1.0 soft modem (ID1) */
3085
3086                 if(codec->modem)
3087                 {
3088                         printk(KERN_WARNING "i810_audio: codec %d is a softmodem - skipping.\n", ac97_id);
3089                         ac97_release_codec(codec);
3090                         continue;
3091                 }
3092
3093                 card->ac97_features = eid;
3094
3095                 /* Now check the codec for useful features to make up for
3096                    the dumbness of the 810 hardware engine */
3097
3098                 if(!(eid&0x0001))
3099                         printk(KERN_WARNING "i810_audio: only 48Khz playback available.\n");
3100                 else
3101                 {
3102                         if(!i810_ac97_enable_variable_rate(codec)) {
3103                                 printk(KERN_WARNING "i810_audio: Codec refused to allow VRA, using 48Khz only.\n");
3104                                 card->ac97_features&=~1;
3105                         }
3106                 }
3107
3108                 /* Turn on the amplifier */
3109
3110                 codec->codec_write(codec, AC97_POWER_CONTROL,
3111                          codec->codec_read(codec, AC97_POWER_CONTROL) & ~0x8000);
3112
3113                 /* Determine how many channels the codec(s) support   */
3114                 /*   - The primary codec always supports 2            */
3115                 /*   - If the codec supports AMAP, surround DACs will */
3116                 /*     automaticlly get assigned to slots.            */
3117                 /*     * Check for surround DACs and increment if     */
3118                 /*       found.                                       */
3119                 /*   - Else check if the codec is revision 2.2        */
3120                 /*     * If surround DACs exist, assign them to slots */
3121                 /*       and increment channel count.                 */
3122
3123                 /* All of this only applies to ICH2 and above. ICH    */
3124                 /* and ICH0 only support 2 channels.  ICH2 will only  */
3125                 /* support multiple codecs in a "split audio" config. */
3126                 /* as described above.                                */
3127
3128                 /* TODO: Remove all the debugging messages!           */
3129
3130                 if((eid & 0xc000) == 0) /* primary codec */
3131                         total_channels += 2;
3132
3133                 if(eid & 0x200) { /* GOOD, AMAP support */
3134                         if (eid & 0x0080) /* L/R Surround channels */
3135                                 total_channels += 2;
3136                         if (eid & 0x0140) /* LFE and Center channels */
3137                                 total_channels += 2;
3138                         printk("i810_audio: AC'97 codec %d supports AMAP, total channels = %d\n", ac97_id, total_channels);
3139                 } else if (eid & 0x0400) {  /* this only works on 2.2 compliant codecs */
3140                         eid &= 0xffcf;
3141                         if((eid & 0xc000) != 0) {
3142                                 switch ( total_channels ) {
3143                                         case 2:
3144                                                 /* Set dsa1, dsa0 to 01 */
3145                                                 eid |= 0x0010;
3146                                                 break;
3147                                         case 4:
3148                                                 /* Set dsa1, dsa0 to 10 */
3149                                                 eid |= 0x0020;
3150                                                 break;
3151                                         case 6:
3152                                                 /* Set dsa1, dsa0 to 11 */
3153                                                 eid |= 0x0030;
3154                                                 break;
3155                                 }
3156                                 total_channels += 2;
3157                         }
3158                         i810_ac97_set(codec, AC97_EXTENDED_ID, eid);
3159                         eid = i810_ac97_get(codec, AC97_EXTENDED_ID);
3160                         printk("i810_audio: AC'97 codec %d, new EID value = 0x%04x\n", ac97_id, eid);
3161                         if (eid & 0x0080) /* L/R Surround channels */
3162                                 total_channels += 2;
3163                         if (eid & 0x0140) /* LFE and Center channels */
3164                                 total_channels += 2;
3165                         printk("i810_audio: AC'97 codec %d, DAC map configured, total channels = %d\n", ac97_id, total_channels);
3166                 } else {
3167                         printk("i810_audio: AC'97 codec %d Unable to map surround DAC's (or DAC's not present), total channels = %d\n", ac97_id, total_channels);
3168                 }
3169
3170                 if ((codec->dev_mixer = register_sound_mixer(&i810_mixer_fops, -1)) < 0) {
3171                         printk(KERN_ERR "i810_audio: couldn't register mixer!\n");
3172                         ac97_release_codec(codec);
3173                         break;
3174                 }
3175
3176                 card->ac97_codec[num_ac97] = codec;
3177         }
3178
3179         /* tune up the primary codec */
3180         ac97_tune_hardware(card->pci_dev, ac97_quirks, ac97_quirk);
3181
3182         /* pick the minimum of channels supported by ICHx or codec(s) */
3183         card->channels = (card->channels > total_channels)?total_channels:card->channels;
3184
3185         return num_ac97;
3186 }
3187
3188 static void __devinit i810_configure_clocking (void)
3189 {
3190         struct i810_card *card;
3191         struct i810_state *state;
3192         struct dmabuf *dmabuf;
3193         unsigned int i, offset, new_offset;
3194         unsigned long flags;
3195
3196         card = devs;
3197         /* We could try to set the clocking for multiple cards, but can you even have
3198          * more than one i810 in a machine?  Besides, clocking is global, so unless
3199          * someone actually thinks more than one i810 in a machine is possible and
3200          * decides to rewrite that little bit, setting the rate for more than one card
3201          * is a waste of time.
3202          */
3203         if(card != NULL) {
3204                 state = card->states[0] = (struct i810_state *)
3205                                         kmalloc(sizeof(struct i810_state), GFP_KERNEL);
3206                 if (state == NULL)
3207                         return;
3208                 memset(state, 0, sizeof(struct i810_state));
3209                 dmabuf = &state->dmabuf;
3210
3211                 dmabuf->write_channel = card->alloc_pcm_channel(card);
3212                 state->virt = 0;
3213                 state->card = card;
3214                 state->magic = I810_STATE_MAGIC;
3215                 init_waitqueue_head(&dmabuf->wait);
3216                 init_MUTEX(&state->open_sem);
3217                 dmabuf->fmt = I810_FMT_STEREO | I810_FMT_16BIT;
3218                 dmabuf->trigger = PCM_ENABLE_OUTPUT;
3219                 i810_set_spdif_output(state, -1, 0);
3220                 i810_set_dac_channels(state, 2);
3221                 i810_set_dac_rate(state, 48000);
3222                 if(prog_dmabuf(state, 0) != 0) {
3223                         goto config_out_nodmabuf;
3224                 }
3225                 if(dmabuf->dmasize < 16384) {
3226                         goto config_out;
3227                 }
3228                 dmabuf->count = dmabuf->dmasize;
3229                 CIV_TO_LVI(card, dmabuf->write_channel->port, -1);
3230                 local_irq_save(flags);
3231                 start_dac(state);
3232                 offset = i810_get_dma_addr(state, 0);
3233                 mdelay(50);
3234                 new_offset = i810_get_dma_addr(state, 0);
3235                 stop_dac(state);
3236                 local_irq_restore(flags);
3237                 i = new_offset - offset;
3238 #ifdef DEBUG_INTERRUPTS
3239                 printk("i810_audio: %d bytes in 50 milliseconds\n", i);
3240 #endif
3241                 if(i == 0)
3242                         goto config_out;
3243                 i = i / 4 * 20;
3244                 if (i > 48500 || i < 47500) {
3245                         clocking = clocking * clocking / i;
3246                         printk("i810_audio: setting clocking to %d\n", clocking);
3247                 }
3248 config_out:
3249                 dealloc_dmabuf(state);
3250 config_out_nodmabuf:
3251                 state->card->free_pcm_channel(state->card,state->dmabuf.write_channel->num);
3252                 kfree(state);
3253                 card->states[0] = NULL;
3254         }
3255 }
3256
3257 /* install the driver, we do not allocate hardware channel nor DMA buffer now, they are defered
3258    until "ACCESS" time (in prog_dmabuf called by open/read/write/ioctl/mmap) */
3259
3260 static int __devinit i810_probe(struct pci_dev *pci_dev, const struct pci_device_id *pci_id)
3261 {
3262         struct i810_card *card;
3263
3264         if (pci_enable_device(pci_dev))
3265                 return -EIO;
3266
3267         if (pci_set_dma_mask(pci_dev, I810_DMA_MASK)) {
3268                 printk(KERN_ERR "i810_audio: architecture does not support"
3269                        " 32bit PCI busmaster DMA\n");
3270                 return -ENODEV;
3271         }
3272
3273         if ((card = kmalloc(sizeof(struct i810_card), GFP_KERNEL)) == NULL) {
3274                 printk(KERN_ERR "i810_audio: out of memory\n");
3275                 return -ENOMEM;
3276         }
3277         memset(card, 0, sizeof(*card));
3278
3279         card->initializing = 1;
3280         card->pci_dev = pci_dev;
3281         card->pci_id = pci_id->device;
3282         card->ac97base = pci_resource_start (pci_dev, 0);
3283         card->iobase = pci_resource_start (pci_dev, 1);
3284
3285         if (!(card->ac97base) || !(card->iobase)) {
3286                 card->ac97base = 0;
3287                 card->iobase = 0;
3288         }
3289
3290         /* if chipset could have mmio capability, check it */
3291         if (card_cap[pci_id->driver_data].flags & CAP_MMIO) {
3292                 card->ac97base_mmio_phys = pci_resource_start (pci_dev, 2);
3293                 card->iobase_mmio_phys = pci_resource_start (pci_dev, 3);
3294
3295                 if ((card->ac97base_mmio_phys) && (card->iobase_mmio_phys)) {
3296                         card->use_mmio = 1;
3297                 }
3298                 else {
3299                         card->ac97base_mmio_phys = 0;
3300                         card->iobase_mmio_phys = 0;
3301                 }
3302         }
3303
3304         if (!(card->use_mmio) && (!(card->iobase) || !(card->ac97base))) {
3305                 printk(KERN_ERR "i810_audio: No I/O resources available.\n");
3306                 goto out_mem;
3307         }
3308
3309         card->irq = pci_dev->irq;
3310         card->next = devs;
3311         card->magic = I810_CARD_MAGIC;
3312 #ifdef CONFIG_PM
3313         card->pm_suspended=0;
3314 #endif
3315         spin_lock_init(&card->lock);
3316         spin_lock_init(&card->ac97_lock);
3317         devs = card;
3318
3319         pci_set_master(pci_dev);
3320
3321         printk(KERN_INFO "i810: %s found at IO 0x%04lx and 0x%04lx, "
3322                "MEM 0x%04lx and 0x%04lx, IRQ %d\n",
3323                card_names[pci_id->driver_data],
3324                card->iobase, card->ac97base,
3325                card->ac97base_mmio_phys, card->iobase_mmio_phys,
3326                card->irq);
3327
3328         card->alloc_pcm_channel = i810_alloc_pcm_channel;
3329         card->alloc_rec_pcm_channel = i810_alloc_rec_pcm_channel;
3330         card->alloc_rec_mic_channel = i810_alloc_rec_mic_channel;
3331         card->free_pcm_channel = i810_free_pcm_channel;
3332
3333         if ((card->channel = pci_alloc_consistent(pci_dev,
3334             sizeof(struct i810_channel)*NR_HW_CH, &card->chandma)) == NULL) {
3335                 printk(KERN_ERR "i810: cannot allocate channel DMA memory\n");
3336                 goto out_mem;
3337         }
3338
3339         { /* We may dispose of this altogether some time soon, so... */
3340                 struct i810_channel *cp = card->channel;
3341
3342                 cp[0].offset = 0;
3343                 cp[0].port = 0x00;
3344                 cp[0].num = 0;
3345                 cp[1].offset = 0;
3346                 cp[1].port = 0x10;
3347                 cp[1].num = 1;
3348                 cp[2].offset = 0;
3349                 cp[2].port = 0x20;
3350                 cp[2].num = 2;
3351         }
3352
3353         /* claim our iospace and irq */
3354         if (!request_region(card->iobase, 64, card_names[pci_id->driver_data])) {
3355                 printk(KERN_ERR "i810_audio: unable to allocate region %lx\n", card->iobase);
3356                 goto out_region1;
3357         }
3358         if (!request_region(card->ac97base, 256, card_names[pci_id->driver_data])) {
3359                 printk(KERN_ERR "i810_audio: unable to allocate region %lx\n", card->ac97base);
3360                 goto out_region2;
3361         }
3362
3363         if (card->use_mmio) {
3364                 if (request_mem_region(card->ac97base_mmio_phys, 512, "ich_audio MMBAR")) {
3365                         if ((card->ac97base_mmio = ioremap(card->ac97base_mmio_phys, 512))) { /*@FIXME can ioremap fail? don't know (jsaw) */
3366                                 if (request_mem_region(card->iobase_mmio_phys, 256, "ich_audio MBBAR")) {
3367                                         if ((card->iobase_mmio = ioremap(card->iobase_mmio_phys, 256))) {
3368                                                 printk(KERN_INFO "i810: %s mmio at 0x%04lx and 0x%04lx\n",
3369                                                        card_names[pci_id->driver_data],
3370                                                        (unsigned long) card->ac97base_mmio,
3371                                                        (unsigned long) card->iobase_mmio);
3372                                         }
3373                                         else {
3374                                                 iounmap(card->ac97base_mmio);
3375                                                 release_mem_region(card->ac97base_mmio_phys, 512);
3376                                                 release_mem_region(card->iobase_mmio_phys, 512);
3377                                                 card->use_mmio = 0;
3378                                         }
3379                                 }
3380                                 else {
3381                                         iounmap(card->ac97base_mmio);
3382                                         release_mem_region(card->ac97base_mmio_phys, 512);
3383                                         card->use_mmio = 0;
3384                                 }
3385                         }
3386                 }
3387                 else {
3388                         card->use_mmio = 0;
3389                 }
3390         }
3391
3392         /* initialize AC97 codec and register /dev/mixer */
3393         if (i810_ac97_init(card) <= 0)
3394                 goto out_iospace;
3395         pci_set_drvdata(pci_dev, card);
3396
3397         if(clocking == 0) {
3398                 clocking = 48000;
3399                 i810_configure_clocking();
3400         }
3401
3402         /* register /dev/dsp */
3403         if ((card->dev_audio = register_sound_dsp(&i810_audio_fops, -1)) < 0) {
3404                 int i;
3405                 printk(KERN_ERR "i810_audio: couldn't register DSP device!\n");
3406                 for (i = 0; i < NR_AC97; i++)
3407                 if (card->ac97_codec[i] != NULL) {
3408                         unregister_sound_mixer(card->ac97_codec[i]->dev_mixer);
3409                         ac97_release_codec(card->ac97_codec[i]);
3410                 }
3411                 goto out_iospace;
3412         }
3413
3414         if (request_irq(card->irq, &i810_interrupt, SA_SHIRQ,
3415                         card_names[pci_id->driver_data], card)) {
3416                 printk(KERN_ERR "i810_audio: unable to allocate irq %d\n", card->irq);
3417                 goto out_iospace;
3418         }
3419
3420
3421         card->initializing = 0;
3422         return 0;
3423
3424 out_iospace:
3425         if (card->use_mmio) {
3426                 iounmap(card->ac97base_mmio);
3427                 iounmap(card->iobase_mmio);
3428                 release_mem_region(card->ac97base_mmio_phys, 512);
3429                 release_mem_region(card->iobase_mmio_phys, 256);
3430         }
3431         release_region(card->ac97base, 256);
3432 out_region2:
3433         release_region(card->iobase, 64);
3434 out_region1:
3435         pci_free_consistent(pci_dev, sizeof(struct i810_channel)*NR_HW_CH,
3436             card->channel, card->chandma);
3437 out_mem:
3438         kfree(card);
3439         return -ENODEV;
3440 }
3441
3442 static void __devexit i810_remove(struct pci_dev *pci_dev)
3443 {
3444         int i;
3445         struct i810_card *card = pci_get_drvdata(pci_dev);
3446         /* free hardware resources */
3447         free_irq(card->irq, devs);
3448         release_region(card->iobase, 64);
3449         release_region(card->ac97base, 256);
3450         pci_free_consistent(pci_dev, sizeof(struct i810_channel)*NR_HW_CH,
3451                             card->channel, card->chandma);
3452         if (card->use_mmio) {
3453                 iounmap(card->ac97base_mmio);
3454                 iounmap(card->iobase_mmio);
3455                 release_mem_region(card->ac97base_mmio_phys, 512);
3456                 release_mem_region(card->iobase_mmio_phys, 256);
3457         }
3458
3459         /* unregister audio devices */
3460         for (i = 0; i < NR_AC97; i++)
3461                 if (card->ac97_codec[i] != NULL) {
3462                         unregister_sound_mixer(card->ac97_codec[i]->dev_mixer);
3463                         ac97_release_codec(card->ac97_codec[i]);
3464                         card->ac97_codec[i] = NULL;
3465                 }
3466         unregister_sound_dsp(card->dev_audio);
3467         kfree(card);
3468 }
3469
3470 #ifdef CONFIG_PM
3471 static int i810_pm_suspend(struct pci_dev *dev, pm_message_t pm_state)
3472 {
3473         struct i810_card *card = pci_get_drvdata(dev);
3474         struct i810_state *state;
3475         unsigned long flags;
3476         struct dmabuf *dmabuf;
3477         int i,num_ac97;
3478 #ifdef DEBUG
3479         printk("i810_audio: i810_pm_suspend called\n");
3480 #endif
3481         if(!card) return 0;
3482         spin_lock_irqsave(&card->lock, flags);
3483         card->pm_suspended=1;
3484         for(i=0;i<NR_HW_CH;i++) {
3485                 state = card->states[i];
3486                 if(!state) continue;
3487                 /* this happens only if there are open files */
3488                 dmabuf = &state->dmabuf;
3489                 if(dmabuf->enable & DAC_RUNNING ||
3490                    (dmabuf->count && (dmabuf->trigger & PCM_ENABLE_OUTPUT))) {
3491                         state->pm_saved_dac_rate=dmabuf->rate;
3492                         stop_dac(state);
3493                 } else {
3494                         state->pm_saved_dac_rate=0;
3495                 }
3496                 if(dmabuf->enable & ADC_RUNNING) {
3497                         state->pm_saved_adc_rate=dmabuf->rate;
3498                         stop_adc(state);
3499                 } else {
3500                         state->pm_saved_adc_rate=0;
3501                 }
3502                 dmabuf->ready = 0;
3503                 dmabuf->swptr = dmabuf->hwptr = 0;
3504                 dmabuf->count = dmabuf->total_bytes = 0;
3505         }
3506
3507         spin_unlock_irqrestore(&card->lock, flags);
3508
3509         /* save mixer settings */
3510         for (num_ac97 = 0; num_ac97 < NR_AC97; num_ac97++) {
3511                 struct ac97_codec *codec = card->ac97_codec[num_ac97];
3512                 if(!codec) continue;
3513                 for(i=0;i< SOUND_MIXER_NRDEVICES ;i++) {
3514                         if((supported_mixer(codec,i)) &&
3515                            (codec->read_mixer)) {
3516                                 card->pm_saved_mixer_settings[i][num_ac97]=
3517                                         codec->read_mixer(codec,i);
3518                         }
3519                 }
3520         }
3521         pci_save_state(dev); /* XXX do we need this? */
3522         pci_disable_device(dev); /* disable busmastering */
3523         pci_set_power_state(dev,3); /* Zzz. */
3524
3525         return 0;
3526 }
3527
3528
3529 static int i810_pm_resume(struct pci_dev *dev)
3530 {
3531         int num_ac97,i=0;
3532         struct i810_card *card=pci_get_drvdata(dev);
3533         pci_enable_device(dev);
3534         pci_restore_state (dev);
3535
3536         /* observation of a toshiba portege 3440ct suggests that the
3537            hardware has to be more or less completely reinitialized from
3538            scratch after an apm suspend.  Works For Me.   -dan */
3539
3540         i810_ac97_power_up_bus(card);
3541
3542         for (num_ac97 = 0; num_ac97 < NR_AC97; num_ac97++) {
3543                 struct ac97_codec *codec = card->ac97_codec[num_ac97];
3544                 /* check they haven't stolen the hardware while we were
3545                    away */
3546                 if(!codec || !i810_ac97_exists(card,num_ac97)) {
3547                         if(num_ac97) continue;
3548                         else BUG();
3549                 }
3550                 if(!i810_ac97_probe_and_powerup(card,codec)) BUG();
3551
3552                 if((card->ac97_features&0x0001)) {
3553                         /* at probe time we found we could do variable
3554                            rates, but APM suspend has made it forget
3555                            its magical powers */
3556                         if(!i810_ac97_enable_variable_rate(codec)) BUG();
3557                 }
3558                 /* we lost our mixer settings, so restore them */
3559                 for(i=0;i< SOUND_MIXER_NRDEVICES ;i++) {
3560                         if(supported_mixer(codec,i)){
3561                                 int val=card->
3562                                         pm_saved_mixer_settings[i][num_ac97];
3563                                 codec->mixer_state[i]=val;
3564                                 codec->write_mixer(codec,i,
3565                                                    (val  & 0xff) ,
3566                                                    ((val >> 8)  & 0xff) );
3567                         }
3568                 }
3569         }
3570
3571         /* we need to restore the sample rate from whatever it was */
3572         for(i=0;i<NR_HW_CH;i++) {
3573                 struct i810_state * state=card->states[i];
3574                 if(state) {
3575                         if(state->pm_saved_adc_rate)
3576                                 i810_set_adc_rate(state,state->pm_saved_adc_rate);
3577                         if(state->pm_saved_dac_rate)
3578                                 i810_set_dac_rate(state,state->pm_saved_dac_rate);
3579                 }
3580         }
3581
3582
3583         card->pm_suspended = 0;
3584
3585         /* any processes that were reading/writing during the suspend
3586            probably ended up here */
3587         for(i=0;i<NR_HW_CH;i++) {
3588                 struct i810_state *state = card->states[i];
3589                 if(state) wake_up(&state->dmabuf.wait);
3590         }
3591
3592         return 0;
3593 }
3594 #endif /* CONFIG_PM */
3595
3596 MODULE_AUTHOR("The Linux kernel team");
3597 MODULE_DESCRIPTION("Intel 810 audio support");
3598 MODULE_LICENSE("GPL");
3599 module_param(ftsodell, int, 0444);
3600 module_param(clocking, uint, 0444);
3601 module_param(strict_clocking, int, 0444);
3602 module_param(spdif_locked, int, 0444);
3603
3604 #define I810_MODULE_NAME "i810_audio"
3605
3606 static struct pci_driver i810_pci_driver = {
3607         .name           = I810_MODULE_NAME,
3608         .id_table       = i810_pci_tbl,
3609         .probe          = i810_probe,
3610         .remove         = __devexit_p(i810_remove),
3611 #ifdef CONFIG_PM
3612         .suspend        = i810_pm_suspend,
3613         .resume         = i810_pm_resume,
3614 #endif /* CONFIG_PM */
3615 };
3616
3617
3618 static int __init i810_init_module (void)
3619 {
3620         int retval;
3621
3622         printk(KERN_INFO "Intel 810 + AC97 Audio, version "
3623                DRIVER_VERSION ", " __TIME__ " " __DATE__ "\n");
3624
3625         retval = pci_register_driver(&i810_pci_driver);
3626         if (retval)
3627                 return retval;
3628
3629         if(ftsodell != 0) {
3630                 printk("i810_audio: ftsodell is now a deprecated option.\n");
3631         }
3632         if(spdif_locked > 0 ) {
3633                 if(spdif_locked == 32000 || spdif_locked == 44100 || spdif_locked == 48000) {
3634                         printk("i810_audio: Enabling S/PDIF at sample rate %dHz.\n", spdif_locked);
3635                 } else {
3636                         printk("i810_audio: S/PDIF can only be locked to 32000, 44100, or 48000Hz.\n");
3637                         spdif_locked = 0;
3638                 }
3639         }
3640
3641         return 0;
3642 }
3643
3644 static void __exit i810_cleanup_module (void)
3645 {
3646         pci_unregister_driver(&i810_pci_driver);
3647 }
3648
3649 module_init(i810_init_module);
3650 module_exit(i810_cleanup_module);
3651
3652 /*
3653 Local Variables:
3654 c-basic-offset: 8
3655 End:
3656 */