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_stream_lock(dev->dmasound.substream);
 176                 snd_pcm_stop(dev->dmasound.substream,SNDRV_PCM_STATE_XRUN);
 177                 snd_pcm_stream_unlock(dev->dmasound.substream);
 178                 return;
 179         }
 180
 181         /* next block addr */
 182         next_blk = (dev->dmasound.dma_blk + 2) % dev->dmasound.blocks;
 183         saa_writel(reg,next_blk * dev->dmasound.blksize);
 184         if (debug > 2)
 185                 dprintk("irq: ok, %s, next_blk=%d, addr=%x, blocks=%u, size=%u, read=%u\n",
 186                         (status & 0x10000000) ? "even" : "odd ", next_blk,
 187                         next_blk * dev->dmasound.blksize, dev->dmasound.blocks, dev->dmasound.blksize, dev->dmasound.read_count);
 188
 189         /* update status & wake waiting readers */
 190         dev->dmasound.dma_blk = (dev->dmasound.dma_blk + 1) % dev->dmasound.blocks;
 191         dev->dmasound.read_count += dev->dmasound.blksize;
 192
 193         dev->dmasound.recording_on = reg;
 194
 195         if (dev->dmasound.read_count >= snd_pcm_lib_period_bytes(dev->dmasound.substream)) {
 196                 spin_unlock(&dev->slock);
 197                 snd_pcm_period_elapsed(dev->dmasound.substream);
 198                 spin_lock(&dev->slock);
 199         }
 200
 201  done:
 202         spin_unlock(&dev->slock);
 203
 204 }
 205
 206 /*
 207  * IRQ request handler
 208  *
 209  *   Runs along with saa7134's IRQ handler, discards anything that isn't
 210  *   DMA sound
 211  *
 212  */
 213
 214 static irqreturn_t saa7134_alsa_irq(int irq, void *dev_id)
 215 {
 216         struct saa7134_dmasound *dmasound = dev_id;
 217         struct saa7134_dev *dev = dmasound->priv_data;
 218
 219         unsigned long report, status;
 220         int loop, handled = 0;
 221
 222         for (loop = 0; loop < 10; loop++) {
 223                 report = saa_readl(SAA7134_IRQ_REPORT);
 224                 status = saa_readl(SAA7134_IRQ_STATUS);
 225
 226                 if (report & SAA7134_IRQ_REPORT_DONE_RA3) {
 227                         handled = 1;
 228                         saa_writel(SAA7134_IRQ_REPORT,
 229                                    SAA7134_IRQ_REPORT_DONE_RA3);
 230                         saa7134_irq_alsa_done(dev, status);
 231                 } else {
 232                         goto out;
 233                 }
 234         }
 235
 236         if (loop == 10) {
 237                 dprintk("error! looping IRQ!");
 238         }
 239
 240 out:
 241         return IRQ_RETVAL(handled);
 242 }
 243
 244 /*
 245  * ALSA capture trigger
 246  *
 247  *   - One of the ALSA capture callbacks.
 248  *
 249  *   Called whenever a capture is started or stopped. Must be defined,
 250  *   but there's nothing we want to do here
 251  *
 252  */
 253
 254 static int snd_card_saa7134_capture_trigger(struct snd_pcm_substream * substream,
 255                                           int cmd)
 256 {
 257         struct snd_pcm_runtime *runtime = substream->runtime;
 258         snd_card_saa7134_pcm_t *pcm = runtime->private_data;
 259         struct saa7134_dev *dev=pcm->dev;
 260         int err = 0;
 261
 262         spin_lock(&dev->slock);
 263         if (cmd == SNDRV_PCM_TRIGGER_START) {
 264                 /* start dma */
 265                 saa7134_dma_start(dev);
 266         } else if (cmd == SNDRV_PCM_TRIGGER_STOP) {
 267                 /* stop dma */
 268                 saa7134_dma_stop(dev);
 269         } else {
 270                 err = -EINVAL;
 271         }
 272         spin_unlock(&dev->slock);
 273
 274         return err;
 275 }
 276
 277 /*
 278  * DMA buffer initialization
 279  *
 280  *   Uses V4L functions to initialize the DMA. Shouldn't be necessary in
 281  *  ALSA, but I was unable to use ALSA's own DMA, and had to force the
 282  *  usage of V4L's
 283  *
 284  *   - Copied verbatim from saa7134-oss.
 285  *
 286  */
 287
 288 static int dsp_buffer_init(struct saa7134_dev *dev)
 289 {
 290         int err;
 291
 292         BUG_ON(!dev->dmasound.bufsize);
 293
 294         videobuf_dma_init(&dev->dmasound.dma);
 295         err = videobuf_dma_init_kernel(&dev->dmasound.dma, PCI_DMA_FROMDEVICE,
 296                                        (dev->dmasound.bufsize + PAGE_SIZE) >> PAGE_SHIFT);
 297         if (0 != err)
 298                 return err;
 299         return 0;
 300 }
 301
 302 /*
 303  * DMA buffer release
 304  *
 305  *   Called after closing the device, during snd_card_saa7134_capture_close
 306  *
 307  */
 308
 309 static int dsp_buffer_free(struct saa7134_dev *dev)
 310 {
 311         BUG_ON(!dev->dmasound.blksize);
 312
 313         videobuf_dma_free(&dev->dmasound.dma);
 314
 315         dev->dmasound.blocks  = 0;
 316         dev->dmasound.blksize = 0;
 317         dev->dmasound.bufsize = 0;
 318
 319         return 0;
 320 }
 321
 322 /*
 323  * Setting the capture source and updating the ALSA controls
 324  */
 325 static int snd_saa7134_capsrc_set(struct snd_kcontrol *kcontrol,
 326                                   int left, int right, bool force_notify)
 327 {
 328         snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol);
 329         int change = 0, addr = kcontrol->private_value;
 330         int active, old_addr;
 331         u32 anabar, xbarin;
 332         int analog_io, rate;
 333         struct saa7134_dev *dev;
 334
 335         dev = chip->dev;
 336
 337         spin_lock_irq(&chip->mixer_lock);
 338
 339         active = left != 0 || right != 0;
 340         old_addr = chip->capture_source_addr;
 341
 342         /* The active capture source cannot be deactivated */
 343         if (active) {
 344                 change = old_addr != addr ||
 345                          chip->capture_source[0] != left ||
 346                          chip->capture_source[1] != right;
 347
 348                 chip->capture_source[0] = left;
 349                 chip->capture_source[1] = right;
 350                 chip->capture_source_addr = addr;
 351                 dev->dmasound.input = addr;
 352         }
 353         spin_unlock_irq(&chip->mixer_lock);
 354
 355         if (change) {
 356                 switch (dev->pci->device) {
 357
 358                 case PCI_DEVICE_ID_PHILIPS_SAA7134:
 359                         switch (addr) {
 360                         case MIXER_ADDR_TVTUNER:
 361                                 saa_andorb(SAA7134_AUDIO_FORMAT_CTRL,
 362                                            0xc0, 0xc0);
 363                                 saa_andorb(SAA7134_SIF_SAMPLE_FREQ,
 364                                            0x03, 0x00);
 365                                 break;
 366                         case MIXER_ADDR_LINE1:
 367                         case MIXER_ADDR_LINE2:
 368                                 analog_io = (MIXER_ADDR_LINE1 == addr) ?
 369                                              0x00 : 0x08;
 370                                 rate = (32000 == dev->dmasound.rate) ?
 371                                         0x01 : 0x03;
 372                                 saa_andorb(SAA7134_ANALOG_IO_SELECT,
 373                                            0x08, analog_io);
 374                                 saa_andorb(SAA7134_AUDIO_FORMAT_CTRL,
 375                                            0xc0, 0x80);
 376                                 saa_andorb(SAA7134_SIF_SAMPLE_FREQ,
 377                                            0x03, rate);
 378                                 break;
 379                         }
 380
 381                         break;
 382                 case PCI_DEVICE_ID_PHILIPS_SAA7133:
 383                 case PCI_DEVICE_ID_PHILIPS_SAA7135:
 384                         xbarin = 0x03; /* adc */
 385                         anabar = 0;
 386                         switch (addr) {
 387                         case MIXER_ADDR_TVTUNER:
 388                                 xbarin = 0; /* Demodulator */
 389                                 anabar = 2; /* DACs */
 390                                 break;
 391                         case MIXER_ADDR_LINE1:
 392                                 anabar = 0;  /* aux1, aux1 */
 393                                 break;
 394                         case MIXER_ADDR_LINE2:
 395                                 anabar = 9;  /* aux2, aux2 */
 396                                 break;
 397                         }
 398
 399                         /* output xbar always main channel */
 400                         saa_dsp_writel(dev, SAA7133_DIGITAL_OUTPUT_SEL1,
 401                                        0xbbbb10);
 402
 403                         if (left || right) {
 404                                 /* We've got data, turn the input on */
 405                                 saa_dsp_writel(dev, SAA7133_DIGITAL_INPUT_XBAR1,
 406                                                xbarin);
 407                                 saa_writel(SAA7133_ANALOG_IO_SELECT, anabar);
 408                         } else {
 409                                 saa_dsp_writel(dev, SAA7133_DIGITAL_INPUT_XBAR1,
 410                                                0);
 411                                 saa_writel(SAA7133_ANALOG_IO_SELECT, 0);
 412                         }
 413                         break;
 414                 }
 415         }
 416
 417         if (change) {
 418                 if (force_notify)
 419                         snd_ctl_notify(chip->card,
 420                                        SNDRV_CTL_EVENT_MASK_VALUE,
 421                                        &chip->capture_ctl[addr]->id);
 422
 423                 if (old_addr != MIXER_ADDR_UNSELECTED && old_addr != addr)
 424                         snd_ctl_notify(chip->card,
 425                                        SNDRV_CTL_EVENT_MASK_VALUE,
 426                                        &chip->capture_ctl[old_addr]->id);
 427         }
 428
 429         return change;
 430 }
 431
 432 /*
 433  * ALSA PCM preparation
 434  *
 435  *   - One of the ALSA capture callbacks.
 436  *
 437  *   Called right after the capture device is opened, this function configures
 438  *  the buffer using the previously defined functions, allocates the memory,
 439  *  sets up the hardware registers, and then starts the DMA. When this function
 440  *  returns, the audio should be flowing.
 441  *
 442  */
 443
 444 static int snd_card_saa7134_capture_prepare(struct snd_pcm_substream * substream)
 445 {
 446         struct snd_pcm_runtime *runtime = substream->runtime;
 447         int bswap, sign;
 448         u32 fmt, control;
 449         snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
 450         struct saa7134_dev *dev;
 451         snd_card_saa7134_pcm_t *pcm = runtime->private_data;
 452
 453         pcm->dev->dmasound.substream = substream;
 454
 455         dev = saa7134->dev;
 456
 457         if (snd_pcm_format_width(runtime->format) == 8)
 458                 fmt = 0x00;
 459         else
 460                 fmt = 0x01;
 461
 462         if (snd_pcm_format_signed(runtime->format))
 463                 sign = 1;
 464         else
 465                 sign = 0;
 466
 467         if (snd_pcm_format_big_endian(runtime->format))
 468                 bswap = 1;
 469         else
 470                 bswap = 0;
 471
 472         switch (dev->pci->device) {
 473           case PCI_DEVICE_ID_PHILIPS_SAA7134:
 474                 if (1 == runtime->channels)
 475                         fmt |= (1 << 3);
 476                 if (2 == runtime->channels)
 477                         fmt |= (3 << 3);
 478                 if (sign)
 479                         fmt |= 0x04;
 480
 481                 fmt |= (MIXER_ADDR_TVTUNER == dev->dmasound.input) ? 0xc0 : 0x80;
 482                 saa_writeb(SAA7134_NUM_SAMPLES0, ((dev->dmasound.blksize - 1) & 0x0000ff));
 483                 saa_writeb(SAA7134_NUM_SAMPLES1, ((dev->dmasound.blksize - 1) & 0x00ff00) >>  8);
 484                 saa_writeb(SAA7134_NUM_SAMPLES2, ((dev->dmasound.blksize - 1) & 0xff0000) >> 16);
 485                 saa_writeb(SAA7134_AUDIO_FORMAT_CTRL, fmt);
 486
 487                 break;
 488           case PCI_DEVICE_ID_PHILIPS_SAA7133:
 489           case PCI_DEVICE_ID_PHILIPS_SAA7135:
 490                 if (1 == runtime->channels)
 491                         fmt |= (1 << 4);
 492                 if (2 == runtime->channels)
 493                         fmt |= (2 << 4);
 494                 if (!sign)
 495                         fmt |= 0x04;
 496                 saa_writel(SAA7133_NUM_SAMPLES, dev->dmasound.blksize -1);
 497                 saa_writel(SAA7133_AUDIO_CHANNEL, 0x543210 | (fmt << 24));
 498                 break;
 499         }
 500
 501         dprintk("rec_start: afmt=%d ch=%d  =>  fmt=0x%x swap=%c\n",
 502                 runtime->format, runtime->channels, fmt,
 503                 bswap ? 'b' : '-');
 504         /* dma: setup channel 6 (= AUDIO) */
 505         control = SAA7134_RS_CONTROL_BURST_16 |
 506                 SAA7134_RS_CONTROL_ME |
 507                 (dev->dmasound.pt.dma >> 12);
 508         if (bswap)
 509                 control |= SAA7134_RS_CONTROL_BSWAP;
 510
 511         saa_writel(SAA7134_RS_BA1(6),0);
 512         saa_writel(SAA7134_RS_BA2(6),dev->dmasound.blksize);
 513         saa_writel(SAA7134_RS_PITCH(6),0);
 514         saa_writel(SAA7134_RS_CONTROL(6),control);
 515
 516         dev->dmasound.rate = runtime->rate;
 517
 518         /* Setup and update the card/ALSA controls */
 519         snd_saa7134_capsrc_set(saa7134->capture_ctl[dev->dmasound.input], 1, 1,
 520                                true);
 521
 522         return 0;
 523
 524 }
 525
 526 /*
 527  * ALSA pointer fetching
 528  *
 529  *   - One of the ALSA capture callbacks.
 530  *
 531  *   Called whenever a period elapses, it must return the current hardware
 532  *  position of the buffer.
 533  *   Also resets the read counter used to prevent overruns
 534  *
 535  */
 536
 537 static snd_pcm_uframes_t
 538 snd_card_saa7134_capture_pointer(struct snd_pcm_substream * substream)
 539 {
 540         struct snd_pcm_runtime *runtime = substream->runtime;
 541         snd_card_saa7134_pcm_t *pcm = runtime->private_data;
 542         struct saa7134_dev *dev=pcm->dev;
 543
 544         if (dev->dmasound.read_count) {
 545                 dev->dmasound.read_count  -= snd_pcm_lib_period_bytes(substream);
 546                 dev->dmasound.read_offset += snd_pcm_lib_period_bytes(substream);
 547                 if (dev->dmasound.read_offset == dev->dmasound.bufsize)
 548                         dev->dmasound.read_offset = 0;
 549         }
 550
 551         return bytes_to_frames(runtime, dev->dmasound.read_offset);
 552 }
 553
 554 /*
 555  * ALSA hardware capabilities definition
 556  *
 557  *  Report only 32kHz for ALSA:
 558  *
 559  *  - SAA7133/35 uses DDEP (DemDec Easy Programming mode), which works in 32kHz
 560  *    only
 561  *  - SAA7134 for TV mode uses DemDec mode (32kHz)
 562  *  - Radio works in 32kHz only
 563  *  - When recording 48kHz from Line1/Line2, switching of capture source to TV
 564  *    means
 565  *    switching to 32kHz without any frequency translation
 566  */
 567
 568 static struct snd_pcm_hardware snd_card_saa7134_capture =
 569 {
 570         .info =                 (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
 571                                  SNDRV_PCM_INFO_BLOCK_TRANSFER |
 572                                  SNDRV_PCM_INFO_MMAP_VALID),
 573         .formats =              SNDRV_PCM_FMTBIT_S16_LE | \
 574                                 SNDRV_PCM_FMTBIT_S16_BE | \
 575                                 SNDRV_PCM_FMTBIT_S8 | \
 576                                 SNDRV_PCM_FMTBIT_U8 | \
 577                                 SNDRV_PCM_FMTBIT_U16_LE | \
 578                                 SNDRV_PCM_FMTBIT_U16_BE,
 579         .rates =                SNDRV_PCM_RATE_32000,
 580         .rate_min =             32000,
 581         .rate_max =             32000,
 582         .channels_min =         1,
 583         .channels_max =         2,
 584         .buffer_bytes_max =     (256*1024),
 585         .period_bytes_min =     64,
 586         .period_bytes_max =     (256*1024),
 587         .periods_min =          4,
 588         .periods_max =          1024,
 589 };
 590
 591 static void snd_card_saa7134_runtime_free(struct snd_pcm_runtime *runtime)
 592 {
 593         snd_card_saa7134_pcm_t *pcm = runtime->private_data;
 594
 595         kfree(pcm);
 596 }
 597
 598
 599 /*
 600  * ALSA hardware params
 601  *
 602  *   - One of the ALSA capture callbacks.
 603  *
 604  *   Called on initialization, right before the PCM preparation
 605  *
 606  */
 607
 608 static int snd_card_saa7134_hw_params(struct snd_pcm_substream * substream,
 609                                       struct snd_pcm_hw_params * hw_params)
 610 {
 611         snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
 612         struct saa7134_dev *dev;
 613         unsigned int period_size, periods;
 614         int err;
 615
 616         period_size = params_period_bytes(hw_params);
 617         periods = params_periods(hw_params);
 618
 619         if (period_size < 0x100 || period_size > 0x10000)
 620                 return -EINVAL;
 621         if (periods < 4)
 622                 return -EINVAL;
 623         if (period_size * periods > 1024 * 1024)
 624                 return -EINVAL;
 625
 626         dev = saa7134->dev;
 627
 628         if (dev->dmasound.blocks == periods &&
 629             dev->dmasound.blksize == period_size)
 630                 return 0;
 631
 632         /* release the old buffer */
 633         if (substream->runtime->dma_area) {
 634                 saa7134_pgtable_free(dev->pci, &dev->dmasound.pt);
 635                 videobuf_dma_unmap(&dev->pci->dev, &dev->dmasound.dma);
 636                 dsp_buffer_free(dev);
 637                 substream->runtime->dma_area = NULL;
 638         }
 639         dev->dmasound.blocks  = periods;
 640         dev->dmasound.blksize = period_size;
 641         dev->dmasound.bufsize = period_size * periods;
 642
 643         err = dsp_buffer_init(dev);
 644         if (0 != err) {
 645                 dev->dmasound.blocks  = 0;
 646                 dev->dmasound.blksize = 0;
 647                 dev->dmasound.bufsize = 0;
 648                 return err;
 649         }
 650
 651         if (0 != (err = videobuf_dma_map(&dev->pci->dev, &dev->dmasound.dma))) {
 652                 dsp_buffer_free(dev);
 653                 return err;
 654         }
 655         if (0 != (err = saa7134_pgtable_alloc(dev->pci,&dev->dmasound.pt))) {
 656                 videobuf_dma_unmap(&dev->pci->dev, &dev->dmasound.dma);
 657                 dsp_buffer_free(dev);
 658                 return err;
 659         }
 660         if (0 != (err = saa7134_pgtable_build(dev->pci,&dev->dmasound.pt,
 661                                                 dev->dmasound.dma.sglist,
 662                                                 dev->dmasound.dma.sglen,
 663                                                 0))) {
 664                 saa7134_pgtable_free(dev->pci, &dev->dmasound.pt);
 665                 videobuf_dma_unmap(&dev->pci->dev, &dev->dmasound.dma);
 666                 dsp_buffer_free(dev);
 667                 return err;
 668         }
 669
 670         /* I should be able to use runtime->dma_addr in the control
 671            byte, but it doesn't work. So I allocate the DMA using the
 672            V4L functions, and force ALSA to use that as the DMA area */
 673
 674         substream->runtime->dma_area = dev->dmasound.dma.vaddr;
 675         substream->runtime->dma_bytes = dev->dmasound.bufsize;
 676         substream->runtime->dma_addr = 0;
 677
 678         return 0;
 679
 680 }
 681
 682 /*
 683  * ALSA hardware release
 684  *
 685  *   - One of the ALSA capture callbacks.
 686  *
 687  *   Called after closing the device, but before snd_card_saa7134_capture_close
 688  *   It stops the DMA audio and releases the buffers.
 689  *
 690  */
 691
 692 static int snd_card_saa7134_hw_free(struct snd_pcm_substream * substream)
 693 {
 694         snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
 695         struct saa7134_dev *dev;
 696
 697         dev = saa7134->dev;
 698
 699         if (substream->runtime->dma_area) {
 700                 saa7134_pgtable_free(dev->pci, &dev->dmasound.pt);
 701                 videobuf_dma_unmap(&dev->pci->dev, &dev->dmasound.dma);
 702                 dsp_buffer_free(dev);
 703                 substream->runtime->dma_area = NULL;
 704         }
 705
 706         return 0;
 707 }
 708
 709 /*
 710  * ALSA capture finish
 711  *
 712  *   - One of the ALSA capture callbacks.
 713  *
 714  *   Called after closing the device.
 715  *
 716  */
 717
 718 static int snd_card_saa7134_capture_close(struct snd_pcm_substream * substream)
 719 {
 720         snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
 721         struct saa7134_dev *dev = saa7134->dev;
 722
 723         if (saa7134->mute_was_on) {
 724                 dev->ctl_mute = 1;
 725                 saa7134_tvaudio_setmute(dev);
 726         }
 727         return 0;
 728 }
 729
 730 /*
 731  * ALSA capture start
 732  *
 733  *   - One of the ALSA capture callbacks.
 734  *
 735  *   Called when opening the device. It creates and populates the PCM
 736  *  structure
 737  *
 738  */
 739
 740 static int snd_card_saa7134_capture_open(struct snd_pcm_substream * substream)
 741 {
 742         struct snd_pcm_runtime *runtime = substream->runtime;
 743         snd_card_saa7134_pcm_t *pcm;
 744         snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
 745         struct saa7134_dev *dev;
 746         int amux, err;
 747
 748         if (!saa7134) {
 749                 printk(KERN_ERR "BUG: saa7134 can't find device struct."
 750                                 " Can't proceed with open\n");
 751                 return -ENODEV;
 752         }
 753         dev = saa7134->dev;
 754         mutex_lock(&dev->dmasound.lock);
 755
 756         dev->dmasound.read_count  = 0;
 757         dev->dmasound.read_offset = 0;
 758
 759         amux = dev->input->amux;
 760         if ((amux < 1) || (amux > 3))
 761                 amux = 1;
 762         dev->dmasound.input  =  amux - 1;
 763
 764         mutex_unlock(&dev->dmasound.lock);
 765
 766         pcm = kzalloc(sizeof(*pcm), GFP_KERNEL);
 767         if (pcm == NULL)
 768                 return -ENOMEM;
 769
 770         pcm->dev=saa7134->dev;
 771
 772         spin_lock_init(&pcm->lock);
 773
 774         pcm->substream = substream;
 775         runtime->private_data = pcm;
 776         runtime->private_free = snd_card_saa7134_runtime_free;
 777         runtime->hw = snd_card_saa7134_capture;
 778
 779         if (dev->ctl_mute != 0) {
 780                 saa7134->mute_was_on = 1;
 781                 dev->ctl_mute = 0;
 782                 saa7134_tvaudio_setmute(dev);
 783         }
 784
 785         err = snd_pcm_hw_constraint_integer(runtime,
 786                                                 SNDRV_PCM_HW_PARAM_PERIODS);
 787         if (err < 0)
 788                 return err;
 789
 790         err = snd_pcm_hw_constraint_step(runtime, 0,
 791                                                 SNDRV_PCM_HW_PARAM_PERIODS, 2);
 792         if (err < 0)
 793                 return err;
 794
 795         return 0;
 796 }
 797
 798 /*
 799  * page callback (needed for mmap)
 800  */
 801
 802 static struct page *snd_card_saa7134_page(struct snd_pcm_substream *substream,
 803                                         unsigned long offset)
 804 {
 805         void *pageptr = substream->runtime->dma_area + offset;
 806         return vmalloc_to_page(pageptr);
 807 }
 808
 809 /*
 810  * ALSA capture callbacks definition
 811  */
 812
 813 static struct snd_pcm_ops snd_card_saa7134_capture_ops = {
 814         .open =                 snd_card_saa7134_capture_open,
 815         .close =                snd_card_saa7134_capture_close,
 816         .ioctl =                snd_pcm_lib_ioctl,
 817         .hw_params =            snd_card_saa7134_hw_params,
 818         .hw_free =              snd_card_saa7134_hw_free,
 819         .prepare =              snd_card_saa7134_capture_prepare,
 820         .trigger =              snd_card_saa7134_capture_trigger,
 821         .pointer =              snd_card_saa7134_capture_pointer,
 822         .page =                 snd_card_saa7134_page,
 823 };
 824
 825 /*
 826  * ALSA PCM setup
 827  *
 828  *   Called when initializing the board. Sets up the name and hooks up
 829  *  the callbacks
 830  *
 831  */
 832
 833 static int snd_card_saa7134_pcm(snd_card_saa7134_t *saa7134, int device)
 834 {
 835         struct snd_pcm *pcm;
 836         int err;
 837
 838         if ((err = snd_pcm_new(saa7134->card, "SAA7134 PCM", device, 0, 1, &pcm)) < 0)
 839                 return err;
 840         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_card_saa7134_capture_ops);
 841         pcm->private_data = saa7134;
 842         pcm->info_flags = 0;
 843         strcpy(pcm->name, "SAA7134 PCM");
 844         return 0;
 845 }
 846
 847 #define SAA713x_VOLUME(xname, xindex, addr) \
 848 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
 849   .info = snd_saa7134_volume_info, \
 850   .get = snd_saa7134_volume_get, .put = snd_saa7134_volume_put, \
 851   .private_value = addr }
 852
 853 static int snd_saa7134_volume_info(struct snd_kcontrol * kcontrol,
 854                                    struct snd_ctl_elem_info * uinfo)
 855 {
 856         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 857         uinfo->count = 2;
 858         uinfo->value.integer.min = 0;
 859         uinfo->value.integer.max = 20;
 860         return 0;
 861 }
 862
 863 static int snd_saa7134_volume_get(struct snd_kcontrol * kcontrol,
 864                                   struct snd_ctl_elem_value * ucontrol)
 865 {
 866         snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol);
 867         int addr = kcontrol->private_value;
 868
 869         ucontrol->value.integer.value[0] = chip->mixer_volume[addr][0];
 870         ucontrol->value.integer.value[1] = chip->mixer_volume[addr][1];
 871         return 0;
 872 }
 873
 874 static int snd_saa7134_volume_put(struct snd_kcontrol * kcontrol,
 875                                   struct snd_ctl_elem_value * ucontrol)
 876 {
 877         snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol);
 878         struct saa7134_dev *dev = chip->dev;
 879
 880         int change, addr = kcontrol->private_value;
 881         int left, right;
 882
 883         left = ucontrol->value.integer.value[0];
 884         if (left < 0)
 885                 left = 0;
 886         if (left > 20)
 887                 left = 20;
 888         right = ucontrol->value.integer.value[1];
 889         if (right < 0)
 890                 right = 0;
 891         if (right > 20)
 892                 right = 20;
 893         spin_lock_irq(&chip->mixer_lock);
 894         change = 0;
 895         if (chip->mixer_volume[addr][0] != left) {
 896                 change = 1;
 897                 right = left;
 898         }
 899         if (chip->mixer_volume[addr][1] != right) {
 900                 change = 1;
 901                 left = right;
 902         }
 903         if (change) {
 904                 switch (dev->pci->device) {
 905                         case PCI_DEVICE_ID_PHILIPS_SAA7134:
 906                                 switch (addr) {
 907                                         case MIXER_ADDR_TVTUNER:
 908                                                 left = 20;
 909                                                 break;
 910                                         case MIXER_ADDR_LINE1:
 911                                                 saa_andorb(SAA7134_ANALOG_IO_SELECT,  0x10,
 912                                                            (left > 10) ? 0x00 : 0x10);
 913                                                 break;
 914                                         case MIXER_ADDR_LINE2:
 915                                                 saa_andorb(SAA7134_ANALOG_IO_SELECT,  0x20,
 916                                                            (left > 10) ? 0x00 : 0x20);
 917                                                 break;
 918                                 }
 919                                 break;
 920                         case PCI_DEVICE_ID_PHILIPS_SAA7133:
 921                         case PCI_DEVICE_ID_PHILIPS_SAA7135:
 922                                 switch (addr) {
 923                                         case MIXER_ADDR_TVTUNER:
 924                                                 left = 20;
 925                                                 break;
 926                                         case MIXER_ADDR_LINE1:
 927                                                 saa_andorb(0x0594,  0x10,
 928                                                            (left > 10) ? 0x00 : 0x10);
 929                                                 break;
 930                                         case MIXER_ADDR_LINE2:
 931                                                 saa_andorb(0x0594,  0x20,
 932                                                            (left > 10) ? 0x00 : 0x20);
 933                                                 break;
 934                                 }
 935                                 break;
 936                 }
 937                 chip->mixer_volume[addr][0] = left;
 938                 chip->mixer_volume[addr][1] = right;
 939         }
 940         spin_unlock_irq(&chip->mixer_lock);
 941         return change;
 942 }
 943
 944 #define SAA713x_CAPSRC(xname, xindex, addr) \
 945 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
 946   .info = snd_saa7134_capsrc_info, \
 947   .get = snd_saa7134_capsrc_get, .put = snd_saa7134_capsrc_put, \
 948   .private_value = addr }
 949
 950 static int snd_saa7134_capsrc_info(struct snd_kcontrol * kcontrol,
 951                                    struct snd_ctl_elem_info * uinfo)
 952 {
 953         uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
 954         uinfo->count = 2;
 955         uinfo->value.integer.min = 0;
 956         uinfo->value.integer.max = 1;
 957         return 0;
 958 }
 959
 960 static int snd_saa7134_capsrc_get(struct snd_kcontrol * kcontrol,
 961                                   struct snd_ctl_elem_value * ucontrol)
 962 {
 963         snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol);
 964         int addr = kcontrol->private_value;
 965
 966         spin_lock_irq(&chip->mixer_lock);
 967         if (chip->capture_source_addr == addr) {
 968                 ucontrol->value.integer.value[0] = chip->capture_source[0];
 969                 ucontrol->value.integer.value[1] = chip->capture_source[1];
 970         } else {
 971                 ucontrol->value.integer.value[0] = 0;
 972                 ucontrol->value.integer.value[1] = 0;
 973         }
 974         spin_unlock_irq(&chip->mixer_lock);
 975
 976         return 0;
 977 }
 978
 979 static int snd_saa7134_capsrc_put(struct snd_kcontrol * kcontrol,
 980                                   struct snd_ctl_elem_value * ucontrol)
 981 {
 982         int left, right;
 983         left = ucontrol->value.integer.value[0] & 1;
 984         right = ucontrol->value.integer.value[1] & 1;
 985
 986         return snd_saa7134_capsrc_set(kcontrol, left, right, false);
 987 }
 988
 989 static struct snd_kcontrol_new snd_saa7134_volume_controls[] = {
 990 SAA713x_VOLUME("Video Volume", 0, MIXER_ADDR_TVTUNER),
 991 SAA713x_VOLUME("Line Volume", 1, MIXER_ADDR_LINE1),
 992 SAA713x_VOLUME("Line Volume", 2, MIXER_ADDR_LINE2),
 993 };
 994
 995 static struct snd_kcontrol_new snd_saa7134_capture_controls[] = {
 996 SAA713x_CAPSRC("Video Capture Switch", 0, MIXER_ADDR_TVTUNER),
 997 SAA713x_CAPSRC("Line Capture Switch", 1, MIXER_ADDR_LINE1),
 998 SAA713x_CAPSRC("Line Capture Switch", 2, MIXER_ADDR_LINE2),
 999 };
1000
1001 /*
1002  * ALSA mixer setup
1003  *
1004  *   Called when initializing the board. Sets up the name and hooks up
1005  *  the callbacks
1006  *
1007  */
1008
1009 static int snd_card_saa7134_new_mixer(snd_card_saa7134_t * chip)
1010 {
1011         struct snd_card *card = chip->card;
1012         struct snd_kcontrol *kcontrol;
1013         unsigned int idx;
1014         int err, addr;
1015
1016         strcpy(card->mixername, "SAA7134 Mixer");
1017
1018         for (idx = 0; idx < ARRAY_SIZE(snd_saa7134_volume_controls); idx++) {
1019                 kcontrol = snd_ctl_new1(&snd_saa7134_volume_controls[idx],
1020                                         chip);
1021                 err = snd_ctl_add(card, kcontrol);
1022                 if (err < 0)
1023                         return err;
1024         }
1025
1026         for (idx = 0; idx < ARRAY_SIZE(snd_saa7134_capture_controls); idx++) {
1027                 kcontrol = snd_ctl_new1(&snd_saa7134_capture_controls[idx],
1028                                         chip);
1029                 addr = snd_saa7134_capture_controls[idx].private_value;
1030                 chip->capture_ctl[addr] = kcontrol;
1031                 err = snd_ctl_add(card, kcontrol);
1032                 if (err < 0)
1033                         return err;
1034         }
1035
1036         chip->capture_source_addr = MIXER_ADDR_UNSELECTED;
1037         return 0;
1038 }
1039
1040 static void snd_saa7134_free(struct snd_card * card)
1041 {
1042         snd_card_saa7134_t *chip = card->private_data;
1043
1044         if (chip->dev->dmasound.priv_data == NULL)
1045                 return;
1046
1047         if (chip->irq >= 0)
1048                 free_irq(chip->irq, &chip->dev->dmasound);
1049
1050         chip->dev->dmasound.priv_data = NULL;
1051
1052 }
1053
1054 /*
1055  * ALSA initialization
1056  *
1057  *   Called by the init routine, once for each saa7134 device present,
1058  *  it creates the basic structures and registers the ALSA devices
1059  *
1060  */
1061
1062 static int alsa_card_saa7134_create(struct saa7134_dev *dev, int devnum)
1063 {
1064
1065         struct snd_card *card;
1066         snd_card_saa7134_t *chip;
1067         int err;
1068
1069
1070         if (devnum >= SNDRV_CARDS)
1071                 return -ENODEV;
1072         if (!enable[devnum])
1073                 return -ENODEV;
1074
1075         err = snd_card_create(index[devnum], id[devnum], THIS_MODULE,
1076                               sizeof(snd_card_saa7134_t), &card);
1077         if (err < 0)
1078                 return err;
1079
1080         strcpy(card->driver, "SAA7134");
1081
1082         /* Card "creation" */
1083
1084         card->private_free = snd_saa7134_free;
1085         chip = card->private_data;
1086
1087         spin_lock_init(&chip->lock);
1088         spin_lock_init(&chip->mixer_lock);
1089
1090         chip->dev = dev;
1091
1092         chip->card = card;
1093
1094         chip->pci = dev->pci;
1095         chip->iobase = pci_resource_start(dev->pci, 0);
1096
1097
1098         err = request_irq(dev->pci->irq, saa7134_alsa_irq,
1099                                 IRQF_SHARED | IRQF_DISABLED, dev->name,
1100                                 (void*) &dev->dmasound);
1101
1102         if (err < 0) {
1103                 printk(KERN_ERR "%s: can't get IRQ %d for ALSA\n",
1104                         dev->name, dev->pci->irq);
1105                 goto __nodev;
1106         }
1107
1108         chip->irq = dev->pci->irq;
1109
1110         mutex_init(&dev->dmasound.lock);
1111
1112         if ((err = snd_card_saa7134_new_mixer(chip)) < 0)
1113                 goto __nodev;
1114
1115         if ((err = snd_card_saa7134_pcm(chip, 0)) < 0)
1116                 goto __nodev;
1117
1118         snd_card_set_dev(card, &chip->pci->dev);
1119
1120         /* End of "creation" */
1121
1122         strcpy(card->shortname, "SAA7134");
1123         sprintf(card->longname, "%s at 0x%lx irq %d",
1124                 chip->dev->name, chip->iobase, chip->irq);
1125
1126         printk(KERN_INFO "%s/alsa: %s registered as card %d\n",dev->name,card->longname,index[devnum]);
1127
1128         if ((err = snd_card_register(card)) == 0) {
1129                 snd_saa7134_cards[devnum] = card;
1130                 return 0;
1131         }
1132
1133 __nodev:
1134         snd_card_free(card);
1135         return err;
1136 }
1137
1138
1139 static int alsa_device_init(struct saa7134_dev *dev)
1140 {
1141         dev->dmasound.priv_data = dev;
1142         alsa_card_saa7134_create(dev,dev->nr);
1143         return 1;
1144 }
1145
1146 static int alsa_device_exit(struct saa7134_dev *dev)
1147 {
1148
1149         snd_card_free(snd_saa7134_cards[dev->nr]);
1150         snd_saa7134_cards[dev->nr] = NULL;
1151         return 1;
1152 }
1153
1154 /*
1155  * Module initializer
1156  *
1157  * Loops through present saa7134 cards, and assigns an ALSA device
1158  * to each one
1159  *
1160  */
1161
1162 static int saa7134_alsa_init(void)
1163 {
1164         struct saa7134_dev *dev = NULL;
1165         struct list_head *list;
1166
1167         saa7134_dmasound_init = alsa_device_init;
1168         saa7134_dmasound_exit = alsa_device_exit;
1169
1170         printk(KERN_INFO "saa7134 ALSA driver for DMA sound loaded\n");
1171
1172         list_for_each(list,&saa7134_devlist) {
1173                 dev = list_entry(list, struct saa7134_dev, devlist);
1174                 if (dev->pci->device == PCI_DEVICE_ID_PHILIPS_SAA7130)
1175                         printk(KERN_INFO "%s/alsa: %s doesn't support digital audio\n",
1176                                 dev->name, saa7134_boards[dev->board].name);
1177                 else
1178                         alsa_device_init(dev);
1179         }
1180
1181         if (dev == NULL)
1182                 printk(KERN_INFO "saa7134 ALSA: no saa7134 cards found\n");
1183
1184         return 0;
1185
1186 }
1187
1188 /*
1189  * Module destructor
1190  */
1191
1192 static void saa7134_alsa_exit(void)
1193 {
1194         int idx;
1195
1196         for (idx = 0; idx < SNDRV_CARDS; idx++) {
1197                 snd_card_free(snd_saa7134_cards[idx]);
1198         }
1199
1200         saa7134_dmasound_init = NULL;
1201         saa7134_dmasound_exit = NULL;
1202         printk(KERN_INFO "saa7134 ALSA driver for DMA sound unloaded\n");
1203
1204         return;
1205 }
1206
1207 /* We initialize this late, to make sure the sound system is up and running */
1208 late_initcall(saa7134_alsa_init);
1209 module_exit(saa7134_alsa_exit);
1210 MODULE_LICENSE("GPL");
1211 MODULE_AUTHOR("Ricardo Cerqueira");