drivers/media/video/saa7134/saa7134-alsa.c

   1 /*
   2  *   SAA713x ALSA support for V4L
   3  *
   4  *   This program is free software; you can redistribute it and/or modify
   5  *   it under the terms of the GNU General Public License as published by
   6  *   the Free Software Foundation, version 2
   7  *
   8  *   This program is distributed in the hope that it will be useful,
   9  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  *   GNU General Public License for more details.
  12  *
  13  *   You should have received a copy of the GNU General Public License
  14  *   along with this program; if not, write to the Free Software
  15  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  16  *
  17  */
  18
  19 #include <linux/init.h>
  20 #include <linux/slab.h>
  21 #include <linux/time.h>
  22 #include <linux/wait.h>
  23 #include <linux/module.h>
  24 #include <sound/core.h>
  25 #include <sound/control.h>
  26 #include <sound/pcm.h>
  27 #include <sound/pcm_params.h>
  28 #include <sound/initval.h>
  29 #include <linux/interrupt.h>
  30
  31 #include "saa7134.h"
  32 #include "saa7134-reg.h"
  33
  34 static unsigned int debug;
  35 module_param(debug, int, 0644);
  36 MODULE_PARM_DESC(debug,"enable debug messages [alsa]");
  37
  38 /*
  39  * Configuration macros
  40  */
  41
  42 /* defaults */
  43 #define MIXER_ADDR_UNSELECTED   -1
  44 #define MIXER_ADDR_TVTUNER      0
  45 #define MIXER_ADDR_LINE1        1
  46 #define MIXER_ADDR_LINE2        2
  47 #define MIXER_ADDR_LAST         2
  48
  49
  50 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;      /* Index 0-MAX */
  51 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;       /* ID for this card */
  52 static int enable[SNDRV_CARDS] = {1, [1 ... (SNDRV_CARDS - 1)] = 1};
  53
  54 module_param_array(index, int, NULL, 0444);
  55 module_param_array(enable, int, NULL, 0444);
  56 MODULE_PARM_DESC(index, "Index value for SAA7134 capture interface(s).");
  57 MODULE_PARM_DESC(enable, "Enable (or not) the SAA7134 capture interface(s).");
  58
  59 #define dprintk(fmt, arg...)    if (debug) \
  60         printk(KERN_DEBUG "%s/alsa: " fmt, dev->name , ##arg)
  61
  62
  63
  64 /*
  65  * Main chip structure
  66  */
  67
  68 typedef struct snd_card_saa7134 {
  69         struct snd_card *card;
  70         spinlock_t mixer_lock;
  71         int mixer_volume[MIXER_ADDR_LAST+1][2];
  72         int capture_source_addr;
  73         int capture_source[2];
  74         struct snd_kcontrol *capture_ctl[MIXER_ADDR_LAST+1];
  75         struct pci_dev *pci;
  76         struct saa7134_dev *dev;
  77
  78         unsigned long iobase;
  79         s16 irq;
  80         u16 mute_was_on;
  81
  82         spinlock_t lock;
  83 } snd_card_saa7134_t;
  84
  85
  86 /*
  87  * PCM structure
  88  */
  89
  90 typedef struct snd_card_saa7134_pcm {
  91         struct saa7134_dev *dev;
  92
  93         spinlock_t lock;
  94
  95         struct snd_pcm_substream *substream;
  96 } snd_card_saa7134_pcm_t;
  97
  98 static struct snd_card *snd_saa7134_cards[SNDRV_CARDS];
  99
 100
 101 /*
 102  * saa7134 DMA audio stop
 103  *
 104  *   Called when the capture device is released or the buffer overflows
 105  *
 106  *   - Copied verbatim from saa7134-oss's dsp_dma_stop.
 107  *
 108  */
 109
 110 static void saa7134_dma_stop(struct saa7134_dev *dev)
 111 {
 112         dev->dmasound.dma_blk     = -1;
 113         dev->dmasound.dma_running = 0;
 114         saa7134_set_dmabits(dev);
 115 }
 116
 117 /*
 118  * saa7134 DMA audio start
 119  *
 120  *   Called when preparing the capture device for use
 121  *
 122  *   - Copied verbatim from saa7134-oss's dsp_dma_start.
 123  *
 124  */
 125
 126 static void saa7134_dma_start(struct saa7134_dev *dev)
 127 {
 128         dev->dmasound.dma_blk     = 0;
 129         dev->dmasound.dma_running = 1;
 130         saa7134_set_dmabits(dev);
 131 }
 132
 133 /*
 134  * saa7134 audio DMA IRQ handler
 135  *
 136  *   Called whenever we get an SAA7134_IRQ_REPORT_DONE_RA3 interrupt
 137  *   Handles shifting between the 2 buffers, manages the read counters,
 138  *  and notifies ALSA when periods elapse
 139  *
 140  *   - Mostly copied from saa7134-oss's saa7134_irq_oss_done.
 141  *
 142  */
 143
 144 static void saa7134_irq_alsa_done(struct saa7134_dev *dev,
 145                                   unsigned long status)
 146 {
 147         int next_blk, reg = 0;
 148
 149         spin_lock(&dev->slock);
 150         if (UNSET == dev->dmasound.dma_blk) {
 151                 dprintk("irq: recording stopped\n");
 152                 goto done;
 153         }
 154         if (0 != (status & 0x0f000000))
 155                 dprintk("irq: lost %ld\n", (status >> 24) & 0x0f);
 156         if (0 == (status & 0x10000000)) {
 157                 /* odd */
 158                 if (0 == (dev->dmasound.dma_blk & 0x01))
 159                         reg = SAA7134_RS_BA1(6);
 160         } else {
 161                 /* even */
 162                 if (1 == (dev->dmasound.dma_blk & 0x01))
 163                         reg = SAA7134_RS_BA2(6);
 164         }
 165         if (0 == reg) {
 166                 dprintk("irq: field oops [%s]\n",
 167                         (status & 0x10000000) ? "even" : "odd");
 168                 goto done;
 169         }
 170
 171         if (dev->dmasound.read_count >= dev->dmasound.blksize * (dev->dmasound.blocks-2)) {
 172                 dprintk("irq: overrun [full=%d/%d] - Blocks in %d\n",dev->dmasound.read_count,
 173                         dev->dmasound.bufsize, dev->dmasound.blocks);
 174                 spin_unlock(&dev->slock);
 175                 snd_pcm_stop(dev->dmasound.substream,SNDRV_PCM_STATE_XRUN);
 176                 return;
 177         }
 178
 179         /* next block addr */
 180         next_blk = (dev->dmasound.dma_blk + 2) % dev->dmasound.blocks;
 181         saa_writel(reg,next_blk * dev->dmasound.blksize);
 182         if (debug > 2)
 183                 dprintk("irq: ok, %s, next_blk=%d, addr=%x, blocks=%u, size=%u, read=%u\n",
 184                         (status & 0x10000000) ? "even" : "odd ", next_blk,
 185                         next_blk * dev->dmasound.blksize, dev->dmasound.blocks, dev->dmasound.blksize, dev->dmasound.read_count);
 186
 187         /* update status & wake waiting readers */
 188         dev->dmasound.dma_blk = (dev->dmasound.dma_blk + 1) % dev->dmasound.blocks;
 189         dev->dmasound.read_count += dev->dmasound.blksize;
 190
 191         dev->dmasound.recording_on = reg;
 192
 193         if (dev->dmasound.read_count >= snd_pcm_lib_period_bytes(dev->dmasound.substream)) {
 194                 spin_unlock(&dev->slock);
 195                 snd_pcm_period_elapsed(dev->dmasound.substream);
 196                 spin_lock(&dev->slock);
 197         }
 198
 199  done:
 200         spin_unlock(&dev->slock);
 201
 202 }
 203
 204 /*
 205  * IRQ request handler
 206  *
 207  *   Runs along with saa7134's IRQ handler, discards anything that isn't
 208  *   DMA sound
 209  *
 210  */
 211
 212 static irqreturn_t saa7134_alsa_irq(int irq, void *dev_id)
 213 {
 214         struct saa7134_dmasound *dmasound = dev_id;
 215         struct saa7134_dev *dev = dmasound->priv_data;
 216
 217         unsigned long report, status;
 218         int loop, handled = 0;
 219
 220         for (loop = 0; loop < 10; loop++) {
 221                 report = saa_readl(SAA7134_IRQ_REPORT);
 222                 status = saa_readl(SAA7134_IRQ_STATUS);
 223
 224                 if (report & SAA7134_IRQ_REPORT_DONE_RA3) {
 225                         handled = 1;
 226                         saa_writel(SAA7134_IRQ_REPORT,
 227                                    SAA7134_IRQ_REPORT_DONE_RA3);
 228                         saa7134_irq_alsa_done(dev, status);
 229                 } else {
 230                         goto out;
 231                 }
 232         }
 233
 234         if (loop == 10) {
 235                 dprintk("error! looping IRQ!");
 236         }
 237
 238 out:
 239         return IRQ_RETVAL(handled);
 240 }
 241
 242 /*
 243  * ALSA capture trigger
 244  *
 245  *   - One of the ALSA capture callbacks.
 246  *
 247  *   Called whenever a capture is started or stopped. Must be defined,
 248  *   but there's nothing we want to do here
 249  *
 250  */
 251
 252 static int snd_card_saa7134_capture_trigger(struct snd_pcm_substream * substream,
 253                                           int cmd)
 254 {
 255         struct snd_pcm_runtime *runtime = substream->runtime;
 256         snd_card_saa7134_pcm_t *pcm = runtime->private_data;
 257         struct saa7134_dev *dev=pcm->dev;
 258         int err = 0;
 259
 260         spin_lock(&dev->slock);
 261         if (cmd == SNDRV_PCM_TRIGGER_START) {
 262                 /* start dma */
 263                 saa7134_dma_start(dev);
 264         } else if (cmd == SNDRV_PCM_TRIGGER_STOP) {
 265                 /* stop dma */
 266                 saa7134_dma_stop(dev);
 267         } else {
 268                 err = -EINVAL;
 269         }
 270         spin_unlock(&dev->slock);
 271
 272         return err;
 273 }
 274
 275 /*
 276  * DMA buffer initialization
 277  *
 278  *   Uses V4L functions to initialize the DMA. Shouldn't be necessary in
 279  *  ALSA, but I was unable to use ALSA's own DMA, and had to force the
 280  *  usage of V4L's
 281  *
 282  *   - Copied verbatim from saa7134-oss.
 283  *
 284  */
 285
 286 static int dsp_buffer_init(struct saa7134_dev *dev)
 287 {
 288         int err;
 289
 290         BUG_ON(!dev->dmasound.bufsize);
 291
 292         videobuf_dma_init(&dev->dmasound.dma);
 293         err = videobuf_dma_init_kernel(&dev->dmasound.dma, PCI_DMA_FROMDEVICE,
 294                                        (dev->dmasound.bufsize + PAGE_SIZE) >> PAGE_SHIFT);
 295         if (0 != err)
 296                 return err;
 297         return 0;
 298 }
 299
 300 /*
 301  * DMA buffer release
 302  *
 303  *   Called after closing the device, during snd_card_saa7134_capture_close
 304  *
 305  */
 306
 307 static int dsp_buffer_free(struct saa7134_dev *dev)
 308 {
 309         BUG_ON(!dev->dmasound.blksize);
 310
 311         videobuf_dma_free(&dev->dmasound.dma);
 312
 313         dev->dmasound.blocks  = 0;
 314         dev->dmasound.blksize = 0;
 315         dev->dmasound.bufsize = 0;
 316
 317         return 0;
 318 }
 319
 320 /*
 321  * Setting the capture source and updating the ALSA controls
 322  */
 323 static int snd_saa7134_capsrc_set(struct snd_kcontrol *kcontrol,
 324                                   int left, int right, bool force_notify)
 325 {
 326         snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol);
 327         int change = 0, addr = kcontrol->private_value;
 328         int active, old_addr;
 329         u32 anabar, xbarin;
 330         int analog_io, rate;
 331         struct saa7134_dev *dev;
 332
 333         dev = chip->dev;
 334
 335         spin_lock_irq(&chip->mixer_lock);
 336
 337         active = left != 0 || right != 0;
 338         old_addr = chip->capture_source_addr;
 339
 340         /* The active capture source cannot be deactivated */
 341         if (active) {
 342                 change = old_addr != addr ||
 343                          chip->capture_source[0] != left ||
 344                          chip->capture_source[1] != right;
 345
 346                 chip->capture_source[0] = left;
 347                 chip->capture_source[1] = right;
 348                 chip->capture_source_addr = addr;
 349                 dev->dmasound.input = addr;
 350         }
 351         spin_unlock_irq(&chip->mixer_lock);
 352
 353         if (change) {
 354                 switch (dev->pci->device) {
 355
 356                 case PCI_DEVICE_ID_PHILIPS_SAA7134:
 357                         switch (addr) {
 358                         case MIXER_ADDR_TVTUNER:
 359                                 saa_andorb(SAA7134_AUDIO_FORMAT_CTRL,
 360                                            0xc0, 0xc0);
 361                                 saa_andorb(SAA7134_SIF_SAMPLE_FREQ,
 362                                            0x03, 0x00);
 363                                 break;
 364                         case MIXER_ADDR_LINE1:
 365                         case MIXER_ADDR_LINE2:
 366                                 analog_io = (MIXER_ADDR_LINE1 == addr) ?
 367                                              0x00 : 0x08;
 368                                 rate = (32000 == dev->dmasound.rate) ?
 369                                         0x01 : 0x03;
 370                                 saa_andorb(SAA7134_ANALOG_IO_SELECT,
 371                                            0x08, analog_io);
 372                                 saa_andorb(SAA7134_AUDIO_FORMAT_CTRL,
 373                                            0xc0, 0x80);
 374                                 saa_andorb(SAA7134_SIF_SAMPLE_FREQ,
 375                                            0x03, rate);
 376                                 break;
 377                         }
 378
 379                         break;
 380                 case PCI_DEVICE_ID_PHILIPS_SAA7133:
 381                 case PCI_DEVICE_ID_PHILIPS_SAA7135:
 382                         xbarin = 0x03; /* adc */
 383                         anabar = 0;
 384                         switch (addr) {
 385                         case MIXER_ADDR_TVTUNER:
 386                                 xbarin = 0; /* Demodulator */
 387                                 anabar = 2; /* DACs */
 388                                 break;
 389                         case MIXER_ADDR_LINE1:
 390                                 anabar = 0;  /* aux1, aux1 */
 391                                 break;
 392                         case MIXER_ADDR_LINE2:
 393                                 anabar = 9;  /* aux2, aux2 */
 394                                 break;
 395                         }
 396
 397                         /* output xbar always main channel */
 398                         saa_dsp_writel(dev, SAA7133_DIGITAL_OUTPUT_SEL1,
 399                                        0xbbbb10);
 400
 401                         if (left || right) {
 402                                 /* We've got data, turn the input on */
 403                                 saa_dsp_writel(dev, SAA7133_DIGITAL_INPUT_XBAR1,
 404                                                xbarin);
 405                                 saa_writel(SAA7133_ANALOG_IO_SELECT, anabar);
 406                         } else {
 407                                 saa_dsp_writel(dev, SAA7133_DIGITAL_INPUT_XBAR1,
 408                                                0);
 409                                 saa_writel(SAA7133_ANALOG_IO_SELECT, 0);
 410                         }
 411                         break;
 412                 }
 413         }
 414
 415         if (change) {
 416                 if (force_notify)
 417                         snd_ctl_notify(chip->card,
 418                                        SNDRV_CTL_EVENT_MASK_VALUE,
 419                                        &chip->capture_ctl[addr]->id);
 420
 421                 if (old_addr != MIXER_ADDR_UNSELECTED && old_addr != addr)
 422                         snd_ctl_notify(chip->card,
 423                                        SNDRV_CTL_EVENT_MASK_VALUE,
 424                                        &chip->capture_ctl[old_addr]->id);
 425         }
 426
 427         return change;
 428 }
 429
 430 /*
 431  * ALSA PCM preparation
 432  *
 433  *   - One of the ALSA capture callbacks.
 434  *
 435  *   Called right after the capture device is opened, this function configures
 436  *  the buffer using the previously defined functions, allocates the memory,
 437  *  sets up the hardware registers, and then starts the DMA. When this function
 438  *  returns, the audio should be flowing.
 439  *
 440  */
 441
 442 static int snd_card_saa7134_capture_prepare(struct snd_pcm_substream * substream)
 443 {
 444         struct snd_pcm_runtime *runtime = substream->runtime;
 445         int bswap, sign;
 446         u32 fmt, control;
 447         snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
 448         struct saa7134_dev *dev;
 449         snd_card_saa7134_pcm_t *pcm = runtime->private_data;
 450
 451         pcm->dev->dmasound.substream = substream;
 452
 453         dev = saa7134->dev;
 454
 455         if (snd_pcm_format_width(runtime->format) == 8)
 456                 fmt = 0x00;
 457         else
 458                 fmt = 0x01;
 459
 460         if (snd_pcm_format_signed(runtime->format))
 461                 sign = 1;
 462         else
 463                 sign = 0;
 464
 465         if (snd_pcm_format_big_endian(runtime->format))
 466                 bswap = 1;
 467         else
 468                 bswap = 0;
 469
 470         switch (dev->pci->device) {
 471           case PCI_DEVICE_ID_PHILIPS_SAA7134:
 472                 if (1 == runtime->channels)
 473                         fmt |= (1 << 3);
 474                 if (2 == runtime->channels)
 475                         fmt |= (3 << 3);
 476                 if (sign)
 477                         fmt |= 0x04;
 478
 479                 fmt |= (MIXER_ADDR_TVTUNER == dev->dmasound.input) ? 0xc0 : 0x80;
 480                 saa_writeb(SAA7134_NUM_SAMPLES0, ((dev->dmasound.blksize - 1) & 0x0000ff));
 481                 saa_writeb(SAA7134_NUM_SAMPLES1, ((dev->dmasound.blksize - 1) & 0x00ff00) >>  8);
 482                 saa_writeb(SAA7134_NUM_SAMPLES2, ((dev->dmasound.blksize - 1) & 0xff0000) >> 16);
 483                 saa_writeb(SAA7134_AUDIO_FORMAT_CTRL, fmt);
 484
 485                 break;
 486           case PCI_DEVICE_ID_PHILIPS_SAA7133:
 487           case PCI_DEVICE_ID_PHILIPS_SAA7135:
 488                 if (1 == runtime->channels)
 489                         fmt |= (1 << 4);
 490                 if (2 == runtime->channels)
 491                         fmt |= (2 << 4);
 492                 if (!sign)
 493                         fmt |= 0x04;
 494                 saa_writel(SAA7133_NUM_SAMPLES, dev->dmasound.blksize -1);
 495                 saa_writel(SAA7133_AUDIO_CHANNEL, 0x543210 | (fmt << 24));
 496                 break;
 497         }
 498
 499         dprintk("rec_start: afmt=%d ch=%d  =>  fmt=0x%x swap=%c\n",
 500                 runtime->format, runtime->channels, fmt,
 501                 bswap ? 'b' : '-');
 502         /* dma: setup channel 6 (= AUDIO) */
 503         control = SAA7134_RS_CONTROL_BURST_16 |
 504                 SAA7134_RS_CONTROL_ME |
 505                 (dev->dmasound.pt.dma >> 12);
 506         if (bswap)
 507                 control |= SAA7134_RS_CONTROL_BSWAP;
 508
 509         saa_writel(SAA7134_RS_BA1(6),0);
 510         saa_writel(SAA7134_RS_BA2(6),dev->dmasound.blksize);
 511         saa_writel(SAA7134_RS_PITCH(6),0);
 512         saa_writel(SAA7134_RS_CONTROL(6),control);
 513
 514         dev->dmasound.rate = runtime->rate;
 515
 516         /* Setup and update the card/ALSA controls */
 517         snd_saa7134_capsrc_set(saa7134->capture_ctl[dev->dmasound.input], 1, 1,
 518                                true);
 519
 520         return 0;
 521
 522 }
 523
 524 /*
 525  * ALSA pointer fetching
 526  *
 527  *   - One of the ALSA capture callbacks.
 528  *
 529  *   Called whenever a period elapses, it must return the current hardware
 530  *  position of the buffer.
 531  *   Also resets the read counter used to prevent overruns
 532  *
 533  */
 534
 535 static snd_pcm_uframes_t
 536 snd_card_saa7134_capture_pointer(struct snd_pcm_substream * substream)
 537 {
 538         struct snd_pcm_runtime *runtime = substream->runtime;
 539         snd_card_saa7134_pcm_t *pcm = runtime->private_data;
 540         struct saa7134_dev *dev=pcm->dev;
 541
 542         if (dev->dmasound.read_count) {
 543                 dev->dmasound.read_count  -= snd_pcm_lib_period_bytes(substream);
 544                 dev->dmasound.read_offset += snd_pcm_lib_period_bytes(substream);
 545                 if (dev->dmasound.read_offset == dev->dmasound.bufsize)
 546                         dev->dmasound.read_offset = 0;
 547         }
 548
 549         return bytes_to_frames(runtime, dev->dmasound.read_offset);
 550 }
 551
 552 /*
 553  * ALSA hardware capabilities definition
 554  *
 555  *  Report only 32kHz for ALSA:
 556  *
 557  *  - SAA7133/35 uses DDEP (DemDec Easy Programming mode), which works in 32kHz
 558  *    only
 559  *  - SAA7134 for TV mode uses DemDec mode (32kHz)
 560  *  - Radio works in 32kHz only
 561  *  - When recording 48kHz from Line1/Line2, switching of capture source to TV
 562  *    means
 563  *    switching to 32kHz without any frequency translation
 564  */
 565
 566 static struct snd_pcm_hardware snd_card_saa7134_capture =
 567 {
 568         .info =                 (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
 569                                  SNDRV_PCM_INFO_BLOCK_TRANSFER |
 570                                  SNDRV_PCM_INFO_MMAP_VALID),
 571         .formats =              SNDRV_PCM_FMTBIT_S16_LE | \
 572                                 SNDRV_PCM_FMTBIT_S16_BE | \
 573                                 SNDRV_PCM_FMTBIT_S8 | \
 574                                 SNDRV_PCM_FMTBIT_U8 | \
 575                                 SNDRV_PCM_FMTBIT_U16_LE | \
 576                                 SNDRV_PCM_FMTBIT_U16_BE,
 577         .rates =                SNDRV_PCM_RATE_32000,
 578         .rate_min =             32000,
 579         .rate_max =             32000,
 580         .channels_min =         1,
 581         .channels_max =         2,
 582         .buffer_bytes_max =     (256*1024),
 583         .period_bytes_min =     64,
 584         .period_bytes_max =     (256*1024),
 585         .periods_min =          4,
 586         .periods_max =          1024,
 587 };
 588
 589 static void snd_card_saa7134_runtime_free(struct snd_pcm_runtime *runtime)
 590 {
 591         snd_card_saa7134_pcm_t *pcm = runtime->private_data;
 592
 593         kfree(pcm);
 594 }
 595
 596
 597 /*
 598  * ALSA hardware params
 599  *
 600  *   - One of the ALSA capture callbacks.
 601  *
 602  *   Called on initialization, right before the PCM preparation
 603  *
 604  */
 605
 606 static int snd_card_saa7134_hw_params(struct snd_pcm_substream * substream,
 607                                       struct snd_pcm_hw_params * hw_params)
 608 {
 609         snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
 610         struct saa7134_dev *dev;
 611         unsigned int period_size, periods;
 612         int err;
 613
 614         period_size = params_period_bytes(hw_params);
 615         periods = params_periods(hw_params);
 616
 617         if (period_size < 0x100 || period_size > 0x10000)
 618                 return -EINVAL;
 619         if (periods < 4)
 620                 return -EINVAL;
 621         if (period_size * periods > 1024 * 1024)
 622                 return -EINVAL;
 623
 624         dev = saa7134->dev;
 625
 626         if (dev->dmasound.blocks == periods &&
 627             dev->dmasound.blksize == period_size)
 628                 return 0;
 629
 630         /* release the old buffer */
 631         if (substream->runtime->dma_area) {
 632                 saa7134_pgtable_free(dev->pci, &dev->dmasound.pt);
 633                 videobuf_dma_unmap(&dev->pci->dev, &dev->dmasound.dma);
 634                 dsp_buffer_free(dev);
 635                 substream->runtime->dma_area = NULL;
 636         }
 637         dev->dmasound.blocks  = periods;
 638         dev->dmasound.blksize = period_size;
 639         dev->dmasound.bufsize = period_size * periods;
 640
 641         err = dsp_buffer_init(dev);
 642         if (0 != err) {
 643                 dev->dmasound.blocks  = 0;
 644                 dev->dmasound.blksize = 0;
 645                 dev->dmasound.bufsize = 0;
 646                 return err;
 647         }
 648
 649         if (0 != (err = videobuf_dma_map(&dev->pci->dev, &dev->dmasound.dma))) {
 650                 dsp_buffer_free(dev);
 651                 return err;
 652         }
 653         if (0 != (err = saa7134_pgtable_alloc(dev->pci,&dev->dmasound.pt))) {
 654                 videobuf_dma_unmap(&dev->pci->dev, &dev->dmasound.dma);
 655                 dsp_buffer_free(dev);
 656                 return err;
 657         }
 658         if (0 != (err = saa7134_pgtable_build(dev->pci,&dev->dmasound.pt,
 659                                                 dev->dmasound.dma.sglist,
 660                                                 dev->dmasound.dma.sglen,
 661                                                 0))) {
 662                 saa7134_pgtable_free(dev->pci, &dev->dmasound.pt);
 663                 videobuf_dma_unmap(&dev->pci->dev, &dev->dmasound.dma);
 664                 dsp_buffer_free(dev);
 665                 return err;
 666         }
 667
 668         /* I should be able to use runtime->dma_addr in the control
 669            byte, but it doesn't work. So I allocate the DMA using the
 670            V4L functions, and force ALSA to use that as the DMA area */
 671
 672         substream->runtime->dma_area = dev->dmasound.dma.vaddr;
 673         substream->runtime->dma_bytes = dev->dmasound.bufsize;
 674         substream->runtime->dma_addr = 0;
 675
 676         return 0;
 677
 678 }
 679
 680 /*
 681  * ALSA hardware release
 682  *
 683  *   - One of the ALSA capture callbacks.
 684  *
 685  *   Called after closing the device, but before snd_card_saa7134_capture_close
 686  *   It stops the DMA audio and releases the buffers.
 687  *
 688  */
 689
 690 static int snd_card_saa7134_hw_free(struct snd_pcm_substream * substream)
 691 {
 692         snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
 693         struct saa7134_dev *dev;
 694
 695         dev = saa7134->dev;
 696
 697         if (substream->runtime->dma_area) {
 698                 saa7134_pgtable_free(dev->pci, &dev->dmasound.pt);
 699                 videobuf_dma_unmap(&dev->pci->dev, &dev->dmasound.dma);
 700                 dsp_buffer_free(dev);
 701                 substream->runtime->dma_area = NULL;
 702         }
 703
 704         return 0;
 705 }
 706
 707 /*
 708  * ALSA capture finish
 709  *
 710  *   - One of the ALSA capture callbacks.
 711  *
 712  *   Called after closing the device.
 713  *
 714  */
 715
 716 static int snd_card_saa7134_capture_close(struct snd_pcm_substream * substream)
 717 {
 718         snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
 719         struct saa7134_dev *dev = saa7134->dev;
 720
 721         if (saa7134->mute_was_on) {
 722                 dev->ctl_mute = 1;
 723                 saa7134_tvaudio_setmute(dev);
 724         }
 725         return 0;
 726 }
 727
 728 /*
 729  * ALSA capture start
 730  *
 731  *   - One of the ALSA capture callbacks.
 732  *
 733  *   Called when opening the device. It creates and populates the PCM
 734  *  structure
 735  *
 736  */
 737
 738 static int snd_card_saa7134_capture_open(struct snd_pcm_substream * substream)
 739 {
 740         struct snd_pcm_runtime *runtime = substream->runtime;
 741         snd_card_saa7134_pcm_t *pcm;
 742         snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
 743         struct saa7134_dev *dev;
 744         int amux, err;
 745
 746         if (!saa7134) {
 747                 printk(KERN_ERR "BUG: saa7134 can't find device struct."
 748                                 " Can't proceed with open\n");
 749                 return -ENODEV;
 750         }
 751         dev = saa7134->dev;
 752         mutex_lock(&dev->dmasound.lock);
 753
 754         dev->dmasound.read_count  = 0;
 755         dev->dmasound.read_offset = 0;
 756
 757         amux = dev->input->amux;
 758         if ((amux < 1) || (amux > 3))
 759                 amux = 1;
 760         dev->dmasound.input  =  amux - 1;
 761
 762         mutex_unlock(&dev->dmasound.lock);
 763
 764         pcm = kzalloc(sizeof(*pcm), GFP_KERNEL);
 765         if (pcm == NULL)
 766                 return -ENOMEM;
 767
 768         pcm->dev=saa7134->dev;
 769
 770         spin_lock_init(&pcm->lock);
 771
 772         pcm->substream = substream;
 773         runtime->private_data = pcm;
 774         runtime->private_free = snd_card_saa7134_runtime_free;
 775         runtime->hw = snd_card_saa7134_capture;
 776
 777         if (dev->ctl_mute != 0) {
 778                 saa7134->mute_was_on = 1;
 779                 dev->ctl_mute = 0;
 780                 saa7134_tvaudio_setmute(dev);
 781         }
 782
 783         err = snd_pcm_hw_constraint_integer(runtime,
 784                                                 SNDRV_PCM_HW_PARAM_PERIODS);
 785         if (err < 0)
 786                 return err;
 787
 788         err = snd_pcm_hw_constraint_step(runtime, 0,
 789                                                 SNDRV_PCM_HW_PARAM_PERIODS, 2);
 790         if (err < 0)
 791                 return err;
 792
 793         return 0;
 794 }
 795
 796 /*
 797  * page callback (needed for mmap)
 798  */
 799
 800 static struct page *snd_card_saa7134_page(struct snd_pcm_substream *substream,
 801                                         unsigned long offset)
 802 {
 803         void *pageptr = substream->runtime->dma_area + offset;
 804         return vmalloc_to_page(pageptr);
 805 }
 806
 807 /*
 808  * ALSA capture callbacks definition
 809  */
 810
 811 static struct snd_pcm_ops snd_card_saa7134_capture_ops = {
 812         .open =                 snd_card_saa7134_capture_open,
 813         .close =                snd_card_saa7134_capture_close,
 814         .ioctl =                snd_pcm_lib_ioctl,
 815         .hw_params =            snd_card_saa7134_hw_params,
 816         .hw_free =              snd_card_saa7134_hw_free,
 817         .prepare =              snd_card_saa7134_capture_prepare,
 818         .trigger =              snd_card_saa7134_capture_trigger,
 819         .pointer =              snd_card_saa7134_capture_pointer,
 820         .page =                 snd_card_saa7134_page,
 821 };
 822
 823 /*
 824  * ALSA PCM setup
 825  *
 826  *   Called when initializing the board. Sets up the name and hooks up
 827  *  the callbacks
 828  *
 829  */
 830
 831 static int snd_card_saa7134_pcm(snd_card_saa7134_t *saa7134, int device)
 832 {
 833         struct snd_pcm *pcm;
 834         int err;
 835
 836         if ((err = snd_pcm_new(saa7134->card, "SAA7134 PCM", device, 0, 1, &pcm)) < 0)
 837                 return err;
 838         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_card_saa7134_capture_ops);
 839         pcm->private_data = saa7134;
 840         pcm->info_flags = 0;
 841         strcpy(pcm->name, "SAA7134 PCM");
 842         return 0;
 843 }
 844
 845 #define SAA713x_VOLUME(xname, xindex, addr) \
 846 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
 847   .info = snd_saa7134_volume_info, \
 848   .get = snd_saa7134_volume_get, .put = snd_saa7134_volume_put, \
 849   .private_value = addr }
 850
 851 static int snd_saa7134_volume_info(struct snd_kcontrol * kcontrol,
 852                                    struct snd_ctl_elem_info * uinfo)
 853 {
 854         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 855         uinfo->count = 2;
 856         uinfo->value.integer.min = 0;
 857         uinfo->value.integer.max = 20;
 858         return 0;
 859 }
 860
 861 static int snd_saa7134_volume_get(struct snd_kcontrol * kcontrol,
 862                                   struct snd_ctl_elem_value * ucontrol)
 863 {
 864         snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol);
 865         int addr = kcontrol->private_value;
 866
 867         ucontrol->value.integer.value[0] = chip->mixer_volume[addr][0];
 868         ucontrol->value.integer.value[1] = chip->mixer_volume[addr][1];
 869         return 0;
 870 }
 871
 872 static int snd_saa7134_volume_put(struct snd_kcontrol * kcontrol,
 873                                   struct snd_ctl_elem_value * ucontrol)
 874 {
 875         snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol);
 876         struct saa7134_dev *dev = chip->dev;
 877
 878         int change, addr = kcontrol->private_value;
 879         int left, right;
 880
 881         left = ucontrol->value.integer.value[0];
 882         if (left < 0)
 883                 left = 0;
 884         if (left > 20)
 885                 left = 20;
 886         right = ucontrol->value.integer.value[1];
 887         if (right < 0)
 888                 right = 0;
 889         if (right > 20)
 890                 right = 20;
 891         spin_lock_irq(&chip->mixer_lock);
 892         change = 0;
 893         if (chip->mixer_volume[addr][0] != left) {
 894                 change = 1;
 895                 right = left;
 896         }
 897         if (chip->mixer_volume[addr][1] != right) {
 898                 change = 1;
 899                 left = right;
 900         }
 901         if (change) {
 902                 switch (dev->pci->device) {
 903                         case PCI_DEVICE_ID_PHILIPS_SAA7134:
 904                                 switch (addr) {
 905                                         case MIXER_ADDR_TVTUNER:
 906                                                 left = 20;
 907                                                 break;
 908                                         case MIXER_ADDR_LINE1:
 909                                                 saa_andorb(SAA7134_ANALOG_IO_SELECT,  0x10,
 910                                                            (left > 10) ? 0x00 : 0x10);
 911                                                 break;
 912                                         case MIXER_ADDR_LINE2:
 913                                                 saa_andorb(SAA7134_ANALOG_IO_SELECT,  0x20,
 914                                                            (left > 10) ? 0x00 : 0x20);
 915                                                 break;
 916                                 }
 917                                 break;
 918                         case PCI_DEVICE_ID_PHILIPS_SAA7133:
 919                         case PCI_DEVICE_ID_PHILIPS_SAA7135:
 920                                 switch (addr) {
 921                                         case MIXER_ADDR_TVTUNER:
 922                                                 left = 20;
 923                                                 break;
 924                                         case MIXER_ADDR_LINE1:
 925                                                 saa_andorb(0x0594,  0x10,
 926                                                            (left > 10) ? 0x00 : 0x10);
 927                                                 break;
 928                                         case MIXER_ADDR_LINE2:
 929                                                 saa_andorb(0x0594,  0x20,
 930                                                            (left > 10) ? 0x00 : 0x20);
 931                                                 break;
 932                                 }
 933                                 break;
 934                 }
 935                 chip->mixer_volume[addr][0] = left;
 936                 chip->mixer_volume[addr][1] = right;
 937         }
 938         spin_unlock_irq(&chip->mixer_lock);
 939         return change;
 940 }
 941
 942 #define SAA713x_CAPSRC(xname, xindex, addr) \
 943 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
 944   .info = snd_saa7134_capsrc_info, \
 945   .get = snd_saa7134_capsrc_get, .put = snd_saa7134_capsrc_put, \
 946   .private_value = addr }
 947
 948 static int snd_saa7134_capsrc_info(struct snd_kcontrol * kcontrol,
 949                                    struct snd_ctl_elem_info * uinfo)
 950 {
 951         uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
 952         uinfo->count = 2;
 953         uinfo->value.integer.min = 0;
 954         uinfo->value.integer.max = 1;
 955         return 0;
 956 }
 957
 958 static int snd_saa7134_capsrc_get(struct snd_kcontrol * kcontrol,
 959                                   struct snd_ctl_elem_value * ucontrol)
 960 {
 961         snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol);
 962         int addr = kcontrol->private_value;
 963
 964         spin_lock_irq(&chip->mixer_lock);
 965         if (chip->capture_source_addr == addr) {
 966                 ucontrol->value.integer.value[0] = chip->capture_source[0];
 967                 ucontrol->value.integer.value[1] = chip->capture_source[1];
 968         } else {
 969                 ucontrol->value.integer.value[0] = 0;
 970                 ucontrol->value.integer.value[1] = 0;
 971         }
 972         spin_unlock_irq(&chip->mixer_lock);
 973
 974         return 0;
 975 }
 976
 977 static int snd_saa7134_capsrc_put(struct snd_kcontrol * kcontrol,
 978                                   struct snd_ctl_elem_value * ucontrol)
 979 {
 980         int left, right;
 981         left = ucontrol->value.integer.value[0] & 1;
 982         right = ucontrol->value.integer.value[1] & 1;
 983
 984         return snd_saa7134_capsrc_set(kcontrol, left, right, false);
 985 }
 986
 987 static struct snd_kcontrol_new snd_saa7134_volume_controls[] = {
 988 SAA713x_VOLUME("Video Volume", 0, MIXER_ADDR_TVTUNER),
 989 SAA713x_VOLUME("Line Volume", 1, MIXER_ADDR_LINE1),
 990 SAA713x_VOLUME("Line Volume", 2, MIXER_ADDR_LINE2),
 991 };
 992
 993 static struct snd_kcontrol_new snd_saa7134_capture_controls[] = {
 994 SAA713x_CAPSRC("Video Capture Switch", 0, MIXER_ADDR_TVTUNER),
 995 SAA713x_CAPSRC("Line Capture Switch", 1, MIXER_ADDR_LINE1),
 996 SAA713x_CAPSRC("Line Capture Switch", 2, MIXER_ADDR_LINE2),
 997 };
 998
 999 /*
1000  * ALSA mixer setup
1001  *
1002  *   Called when initializing the board. Sets up the name and hooks up
1003  *  the callbacks
1004  *
1005  */
1006
1007 static int snd_card_saa7134_new_mixer(snd_card_saa7134_t * chip)
1008 {
1009         struct snd_card *card = chip->card;
1010         struct snd_kcontrol *kcontrol;
1011         unsigned int idx;
1012         int err, addr;
1013
1014         strcpy(card->mixername, "SAA7134 Mixer");
1015
1016         for (idx = 0; idx < ARRAY_SIZE(snd_saa7134_volume_controls); idx++) {
1017                 kcontrol = snd_ctl_new1(&snd_saa7134_volume_controls[idx],
1018                                         chip);
1019                 err = snd_ctl_add(card, kcontrol);
1020                 if (err < 0)
1021                         return err;
1022         }
1023
1024         for (idx = 0; idx < ARRAY_SIZE(snd_saa7134_capture_controls); idx++) {
1025                 kcontrol = snd_ctl_new1(&snd_saa7134_capture_controls[idx],
1026                                         chip);
1027                 addr = snd_saa7134_capture_controls[idx].private_value;
1028                 chip->capture_ctl[addr] = kcontrol;
1029                 err = snd_ctl_add(card, kcontrol);
1030                 if (err < 0)
1031                         return err;
1032         }
1033
1034         chip->capture_source_addr = MIXER_ADDR_UNSELECTED;
1035         return 0;
1036 }
1037
1038 static void snd_saa7134_free(struct snd_card * card)
1039 {
1040         snd_card_saa7134_t *chip = card->private_data;
1041
1042         if (chip->dev->dmasound.priv_data == NULL)
1043                 return;
1044
1045         if (chip->irq >= 0)
1046                 free_irq(chip->irq, &chip->dev->dmasound);
1047
1048         chip->dev->dmasound.priv_data = NULL;
1049
1050 }
1051
1052 /*
1053  * ALSA initialization
1054  *
1055  *   Called by the init routine, once for each saa7134 device present,
1056  *  it creates the basic structures and registers the ALSA devices
1057  *
1058  */
1059
1060 static int alsa_card_saa7134_create(struct saa7134_dev *dev, int devnum)
1061 {
1062
1063         struct snd_card *card;
1064         snd_card_saa7134_t *chip;
1065         int err;
1066
1067
1068         if (devnum >= SNDRV_CARDS)
1069                 return -ENODEV;
1070         if (!enable[devnum])
1071                 return -ENODEV;
1072
1073         err = snd_card_create(index[devnum], id[devnum], THIS_MODULE,
1074                               sizeof(snd_card_saa7134_t), &card);
1075         if (err < 0)
1076                 return err;
1077
1078         strcpy(card->driver, "SAA7134");
1079
1080         /* Card "creation" */
1081
1082         card->private_free = snd_saa7134_free;
1083         chip = card->private_data;
1084
1085         spin_lock_init(&chip->lock);
1086         spin_lock_init(&chip->mixer_lock);
1087
1088         chip->dev = dev;
1089
1090         chip->card = card;
1091
1092         chip->pci = dev->pci;
1093         chip->iobase = pci_resource_start(dev->pci, 0);
1094
1095
1096         err = request_irq(dev->pci->irq, saa7134_alsa_irq,
1097                                 IRQF_SHARED | IRQF_DISABLED, dev->name,
1098                                 (void*) &dev->dmasound);
1099
1100         if (err < 0) {
1101                 printk(KERN_ERR "%s: can't get IRQ %d for ALSA\n",
1102                         dev->name, dev->pci->irq);
1103                 goto __nodev;
1104         }
1105
1106         chip->irq = dev->pci->irq;
1107
1108         mutex_init(&dev->dmasound.lock);
1109
1110         if ((err = snd_card_saa7134_new_mixer(chip)) < 0)
1111                 goto __nodev;
1112
1113         if ((err = snd_card_saa7134_pcm(chip, 0)) < 0)
1114                 goto __nodev;
1115
1116         snd_card_set_dev(card, &chip->pci->dev);
1117
1118         /* End of "creation" */
1119
1120         strcpy(card->shortname, "SAA7134");
1121         sprintf(card->longname, "%s at 0x%lx irq %d",
1122                 chip->dev->name, chip->iobase, chip->irq);
1123
1124         printk(KERN_INFO "%s/alsa: %s registered as card %d\n",dev->name,card->longname,index[devnum]);
1125
1126         if ((err = snd_card_register(card)) == 0) {
1127                 snd_saa7134_cards[devnum] = card;
1128                 return 0;
1129         }
1130
1131 __nodev:
1132         snd_card_free(card);
1133         return err;
1134 }
1135
1136
1137 static int alsa_device_init(struct saa7134_dev *dev)
1138 {
1139         dev->dmasound.priv_data = dev;
1140         alsa_card_saa7134_create(dev,dev->nr);
1141         return 1;
1142 }
1143
1144 static int alsa_device_exit(struct saa7134_dev *dev)
1145 {
1146
1147         snd_card_free(snd_saa7134_cards[dev->nr]);
1148         snd_saa7134_cards[dev->nr] = NULL;
1149         return 1;
1150 }
1151
1152 /*
1153  * Module initializer
1154  *
1155  * Loops through present saa7134 cards, and assigns an ALSA device
1156  * to each one
1157  *
1158  */
1159
1160 static int saa7134_alsa_init(void)
1161 {
1162         struct saa7134_dev *dev = NULL;
1163         struct list_head *list;
1164
1165         saa7134_dmasound_init = alsa_device_init;
1166         saa7134_dmasound_exit = alsa_device_exit;
1167
1168         printk(KERN_INFO "saa7134 ALSA driver for DMA sound loaded\n");
1169
1170         list_for_each(list,&saa7134_devlist) {
1171                 dev = list_entry(list, struct saa7134_dev, devlist);
1172                 if (dev->pci->device == PCI_DEVICE_ID_PHILIPS_SAA7130)
1173                         printk(KERN_INFO "%s/alsa: %s doesn't support digital audio\n",
1174                                 dev->name, saa7134_boards[dev->board].name);
1175                 else
1176                         alsa_device_init(dev);
1177         }
1178
1179         if (dev == NULL)
1180                 printk(KERN_INFO "saa7134 ALSA: no saa7134 cards found\n");
1181
1182         return 0;
1183
1184 }
1185
1186 /*
1187  * Module destructor
1188  */
1189
1190 static void saa7134_alsa_exit(void)
1191 {
1192         int idx;
1193
1194         for (idx = 0; idx < SNDRV_CARDS; idx++) {
1195                 snd_card_free(snd_saa7134_cards[idx]);
1196         }
1197
1198         saa7134_dmasound_init = NULL;
1199         saa7134_dmasound_exit = NULL;
1200         printk(KERN_INFO "saa7134 ALSA driver for DMA sound unloaded\n");
1201
1202         return;
1203 }
1204
1205 /* We initialize this late, to make sure the sound system is up and running */
1206 late_initcall(saa7134_alsa_init);
1207 module_exit(saa7134_alsa_exit);
1208 MODULE_LICENSE("GPL");
1209 MODULE_AUTHOR("Ricardo Cerqueira");