Pileus Git - ~andy/linux/blob - drivers/media/video/saa7134/saa7134-alsa.c

   1 /*
   2  *   SAA713x ALSA support for V4L
   3  *
   4  *
   5  *   Caveats:
   6  *        - Volume doesn't work (it's always at max)
   7  *
   8  *   This program is free software; you can redistribute it and/or modify
   9  *   it under the terms of the GNU General Public License as published by
  10  *   the Free Software Foundation, version 2
  11  *
  12  *   This program is distributed in the hope that it will be useful,
  13  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *   GNU General Public License for more details.
  16  *
  17  *   You should have received a copy of the GNU General Public License
  18  *   along with this program; if not, write to the Free Software
  19  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  20  *
  21  */
  22
  23 #include <sound/driver.h>
  24 #include <linux/init.h>
  25 #include <linux/slab.h>
  26 #include <linux/time.h>
  27 #include <linux/wait.h>
  28 #include <linux/moduleparam.h>
  29 #include <linux/module.h>
  30 #include <sound/core.h>
  31 #include <sound/control.h>
  32 #include <sound/pcm.h>
  33 #include <sound/initval.h>
  34 #include <linux/interrupt.h>
  35
  36 #include "saa7134.h"
  37 #include "saa7134-reg.h"
  38
  39 static unsigned int debug  = 0;
  40 module_param(debug, int, 0644);
  41 MODULE_PARM_DESC(debug,"enable debug messages [alsa]");
  42
  43 /*
  44  * Configuration macros
  45  */
  46
  47 /* defaults */
  48 #define MIXER_ADDR_TVTUNER      0
  49 #define MIXER_ADDR_LINE1        1
  50 #define MIXER_ADDR_LINE2        2
  51 #define MIXER_ADDR_LAST         2
  52
  53 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;      /* Index 0-MAX */
  54 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;       /* ID for this card */
  55 static int enable[SNDRV_CARDS] = {1, [1 ... (SNDRV_CARDS - 1)] = 0};
  56
  57 module_param_array(index, int, NULL, 0444);
  58 MODULE_PARM_DESC(index, "Index value for SAA7134 capture interface(s).");
  59
  60 int position;
  61
  62 #define dprintk(fmt, arg...)    if (debug) \
  63         printk(KERN_DEBUG "%s/alsa: " fmt, dev->name , ## arg)
  64
  65 /*
  66  * Main chip structure
  67  */
  68 typedef struct snd_card_saa7134 {
  69         snd_card_t *card;
  70         spinlock_t mixer_lock;
  71         int mixer_volume[MIXER_ADDR_LAST+1][2];
  72         int capture_source[MIXER_ADDR_LAST+1][2];
  73         struct pci_dev *pci;
  74         struct saa7134_dev *dev;
  75
  76         unsigned long iobase;
  77         int irq;
  78
  79         spinlock_t lock;
  80 } snd_card_saa7134_t;
  81
  82
  83
  84 /*
  85  * PCM structure
  86  */
  87
  88 typedef struct snd_card_saa7134_pcm {
  89         struct saa7134_dev *dev;
  90
  91         spinlock_t lock;
  92
  93         snd_pcm_substream_t *substream;
  94 } snd_card_saa7134_pcm_t;
  95
  96 static snd_card_t *snd_saa7134_cards[SNDRV_CARDS];
  97
  98
  99 /*
 100  * saa7134 DMA audio stop
 101  *
 102  *   Called when the capture device is released or the buffer overflows
 103  *
 104  *   - Copied verbatim from saa7134-oss's dsp_dma_stop.
 105  *
 106  */
 107
 108 static void saa7134_dma_stop(struct saa7134_dev *dev)
 109 {
 110         dev->dmasound.dma_blk     = -1;
 111         dev->dmasound.dma_running = 0;
 112         saa7134_set_dmabits(dev);
 113 }
 114
 115 /*
 116  * saa7134 DMA audio start
 117  *
 118  *   Called when preparing the capture device for use
 119  *
 120  *   - Copied verbatim from saa7134-oss's dsp_dma_start.
 121  *
 122  */
 123
 124 static void saa7134_dma_start(struct saa7134_dev *dev)
 125 {
 126         dev->dmasound.dma_blk     = 0;
 127         dev->dmasound.dma_running = 1;
 128         saa7134_set_dmabits(dev);
 129 }
 130
 131 /*
 132  * saa7134 audio DMA IRQ handler
 133  *
 134  *   Called whenever we get an SAA7134_IRQ_REPORT_DONE_RA3 interrupt
 135  *   Handles shifting between the 2 buffers, manages the read counters,
 136  *  and notifies ALSA when periods elapse
 137  *
 138  *   - Mostly copied from saa7134-oss's saa7134_irq_oss_done.
 139  *
 140  */
 141
 142 void saa7134_irq_alsa_done(struct saa7134_dev *dev, unsigned long status)
 143 {
 144         int next_blk, reg = 0;
 145
 146         spin_lock(&dev->slock);
 147         if (UNSET == dev->dmasound.dma_blk) {
 148                 dprintk("irq: recording stopped\n");
 149                 goto done;
 150         }
 151         if (0 != (status & 0x0f000000))
 152                 dprintk("irq: lost %ld\n", (status >> 24) & 0x0f);
 153         if (0 == (status & 0x10000000)) {
 154                 /* odd */
 155                 if (0 == (dev->dmasound.dma_blk & 0x01))
 156                         reg = SAA7134_RS_BA1(6);
 157         } else {
 158                 /* even */
 159                 if (1 == (dev->dmasound.dma_blk & 0x01))
 160                         reg = SAA7134_RS_BA2(6);
 161         }
 162         if (0 == reg) {
 163                 dprintk("irq: field oops [%s]\n",
 164                         (status & 0x10000000) ? "even" : "odd");
 165                 goto done;
 166         }
 167
 168         if (dev->dmasound.read_count >= dev->dmasound.blksize * (dev->dmasound.blocks-2)) {
 169                 dprintk("irq: overrun [full=%d/%d] - Blocks in %d\n",dev->dmasound.read_count,
 170                         dev->dmasound.bufsize, dev->dmasound.blocks);
 171                 snd_pcm_stop(dev->dmasound.substream,SNDRV_PCM_STATE_XRUN);
 172                 goto done;
 173         }
 174
 175         /* next block addr */
 176         next_blk = (dev->dmasound.dma_blk + 2) % dev->dmasound.blocks;
 177         saa_writel(reg,next_blk * dev->dmasound.blksize);
 178         if (debug > 2)
 179                 dprintk("irq: ok, %s, next_blk=%d, addr=%x, blocks=%u, size=%u, read=%u\n",
 180                         (status & 0x10000000) ? "even" : "odd ", next_blk,
 181                         next_blk * dev->dmasound.blksize, dev->dmasound.blocks, dev->dmasound.blksize, dev->dmasound.read_count);
 182
 183         /* update status & wake waiting readers */
 184         dev->dmasound.dma_blk = (dev->dmasound.dma_blk + 1) % dev->dmasound.blocks;
 185         dev->dmasound.read_count += dev->dmasound.blksize;
 186
 187         dev->dmasound.recording_on = reg;
 188
 189         if (dev->dmasound.read_count >= snd_pcm_lib_period_bytes(dev->dmasound.substream)) {
 190                 spin_unlock(&dev->slock);
 191                 snd_pcm_period_elapsed(dev->dmasound.substream);
 192                 spin_lock(&dev->slock);
 193         }
 194
 195  done:
 196         spin_unlock(&dev->slock);
 197
 198 }
 199
 200 /*
 201  * IRQ request handler
 202  *
 203  *   Runs along with saa7134's IRQ handler, discards anything that isn't
 204  *   DMA sound
 205  *
 206  */
 207
 208 static irqreturn_t saa7134_alsa_irq(int irq, void *dev_id, struct pt_regs *regs)
 209 {
 210         struct saa7134_dmasound *dmasound = dev_id;
 211         struct saa7134_dev *dev = dmasound->priv_data;
 212
 213         unsigned long report, status;
 214         int loop, handled = 0;
 215
 216         for (loop = 0; loop < 10; loop++) {
 217                 report = saa_readl(SAA7134_IRQ_REPORT);
 218                 status = saa_readl(SAA7134_IRQ_STATUS);
 219
 220                 if (report & SAA7134_IRQ_REPORT_DONE_RA3) {
 221                         handled = 1;
 222                         saa_writel(SAA7134_IRQ_REPORT,report);
 223                         saa7134_irq_alsa_done(dev, status);
 224                 } else {
 225                         goto out;
 226                 }
 227         }
 228
 229         if (loop == 10) {
 230                 dprintk("error! looping IRQ!");
 231         }
 232
 233 out:
 234         return IRQ_RETVAL(handled);
 235 }
 236
 237 /*
 238  * ALSA capture trigger
 239  *
 240  *   - One of the ALSA capture callbacks.
 241  *
 242  *   Called whenever a capture is started or stopped. Must be defined,
 243  *   but there's nothing we want to do here
 244  *
 245  */
 246
 247 static int snd_card_saa7134_capture_trigger(snd_pcm_substream_t * substream,
 248                                           int cmd)
 249 {
 250         snd_pcm_runtime_t *runtime = substream->runtime;
 251         snd_card_saa7134_pcm_t *pcm = runtime->private_data;
 252         struct saa7134_dev *dev=pcm->dev;
 253         int err = 0;
 254
 255         spin_lock_irq(&dev->slock);
 256         if (cmd == SNDRV_PCM_TRIGGER_START) {
 257                 /* start dma */
 258                 saa7134_dma_start(dev);
 259         } else if (cmd == SNDRV_PCM_TRIGGER_STOP) {
 260                 /* stop dma */
 261                 saa7134_dma_stop(dev);
 262         } else {
 263                 err = -EINVAL;
 264         }
 265         spin_unlock_irq(&dev->slock);
 266
 267         return err;
 268 }
 269
 270 /*
 271  * DMA buffer config
 272  *
 273  *   Sets the values that will later be used as the size of the buffer,
 274  *  size of the fragments, and total number of fragments.
 275  *   Must be called during the preparation stage, before memory is
 276  *  allocated
 277  *
 278  *   - Copied verbatim from saa7134-oss.
 279  *
 280  */
 281
 282 static int dsp_buffer_conf(struct saa7134_dev *dev, int blksize, int blocks)
 283 {
 284         if (blksize < 0x100)
 285                 blksize = 0x100;
 286         if (blksize > 0x10000)
 287                 blksize = 0x10000;
 288
 289         if (blocks < 2)
 290                 blocks = 2;
 291         if ((blksize * blocks) > 1024*1024)
 292                 blocks = 1024*1024 / blksize;
 293
 294         dev->dmasound.blocks  = blocks;
 295         dev->dmasound.blksize = blksize;
 296         dev->dmasound.bufsize = blksize * blocks;
 297
 298         dprintk("buffer config: %d blocks / %d bytes, %d kB total\n",
 299                 blocks,blksize,blksize * blocks / 1024);
 300         return 0;
 301 }
 302
 303 /*
 304  * DMA buffer initialization
 305  *
 306  *   Uses V4L functions to initialize the DMA. Shouldn't be necessary in
 307  *  ALSA, but I was unable to use ALSA's own DMA, and had to force the
 308  *  usage of V4L's
 309  *
 310  *   - Copied verbatim from saa7134-oss.
 311  *
 312  */
 313
 314 static int dsp_buffer_init(struct saa7134_dev *dev)
 315 {
 316         int err;
 317
 318         BUG_ON(!dev->dmasound.bufsize);
 319
 320         videobuf_dma_init(&dev->dmasound.dma);
 321         err = videobuf_dma_init_kernel(&dev->dmasound.dma, PCI_DMA_FROMDEVICE,
 322                                        (dev->dmasound.bufsize + PAGE_SIZE) >> PAGE_SHIFT);
 323         if (0 != err)
 324                 return err;
 325         return 0;
 326 }
 327
 328 /*
 329  * ALSA PCM preparation
 330  *
 331  *   - One of the ALSA capture callbacks.
 332  *
 333  *   Called right after the capture device is opened, this function configures
 334  *  the buffer using the previously defined functions, allocates the memory,
 335  *  sets up the hardware registers, and then starts the DMA. When this function
 336  *  returns, the audio should be flowing.
 337  *
 338  */
 339
 340 static int snd_card_saa7134_capture_prepare(snd_pcm_substream_t * substream)
 341 {
 342         snd_pcm_runtime_t *runtime = substream->runtime;
 343         int err, bswap, sign;
 344         u32 fmt, control;
 345         snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
 346         struct saa7134_dev *dev;
 347         snd_card_saa7134_pcm_t *pcm = runtime->private_data;
 348         unsigned long size;
 349         unsigned count;
 350
 351         size = snd_pcm_lib_buffer_bytes(substream);
 352         count = snd_pcm_lib_period_bytes(substream);
 353
 354         pcm->dev->dmasound.substream = substream;
 355
 356         dev=saa7134->dev;
 357
 358         dsp_buffer_conf(dev,count,(size/count));
 359
 360         err = dsp_buffer_init(dev);
 361         if (0 != err)
 362                 return err;
 363
 364         /* prepare buffer */
 365         if (0 != (err = videobuf_dma_pci_map(dev->pci,&dev->dmasound.dma)))
 366                 return err;
 367         if (0 != (err = saa7134_pgtable_alloc(dev->pci,&dev->dmasound.pt)))
 368                 goto fail1;
 369         if (0 != (err = saa7134_pgtable_build(dev->pci,&dev->dmasound.pt,
 370                                               dev->dmasound.dma.sglist,
 371                                               dev->dmasound.dma.sglen,
 372                                               0)))
 373                 goto fail2;
 374
 375
 376
 377         switch (runtime->format) {
 378           case SNDRV_PCM_FORMAT_U8:
 379           case SNDRV_PCM_FORMAT_S8:
 380                 fmt = 0x00;
 381                 break;
 382           case SNDRV_PCM_FORMAT_U16_LE:
 383           case SNDRV_PCM_FORMAT_U16_BE:
 384           case SNDRV_PCM_FORMAT_S16_LE:
 385           case SNDRV_PCM_FORMAT_S16_BE:
 386                 fmt = 0x01;
 387                 break;
 388           default:
 389                 err = -EINVAL;
 390                 return 1;
 391         }
 392
 393         switch (runtime->format) {
 394           case SNDRV_PCM_FORMAT_S8:
 395           case SNDRV_PCM_FORMAT_S16_LE:
 396           case SNDRV_PCM_FORMAT_S16_BE:
 397                 sign = 1;
 398                 break;
 399           default:
 400                 sign = 0;
 401                 break;
 402         }
 403
 404         switch (runtime->format) {
 405           case SNDRV_PCM_FORMAT_U16_BE:
 406           case SNDRV_PCM_FORMAT_S16_BE:
 407                 bswap = 1; break;
 408           default:
 409                 bswap = 0; break;
 410         }
 411
 412         switch (dev->pci->device) {
 413           case PCI_DEVICE_ID_PHILIPS_SAA7134:
 414                 if (1 == runtime->channels)
 415                         fmt |= (1 << 3);
 416                 if (2 == runtime->channels)
 417                         fmt |= (3 << 3);
 418                 if (sign)
 419                         fmt |= 0x04;
 420
 421                 fmt |= (MIXER_ADDR_TVTUNER == dev->dmasound.input) ? 0xc0 : 0x80;
 422                 saa_writeb(SAA7134_NUM_SAMPLES0, ((dev->dmasound.blksize - 1) & 0x0000ff));
 423                 saa_writeb(SAA7134_NUM_SAMPLES1, ((dev->dmasound.blksize - 1) & 0x00ff00) >>  8);
 424                 saa_writeb(SAA7134_NUM_SAMPLES2, ((dev->dmasound.blksize - 1) & 0xff0000) >> 16);
 425                 saa_writeb(SAA7134_AUDIO_FORMAT_CTRL, fmt);
 426
 427                 break;
 428           case PCI_DEVICE_ID_PHILIPS_SAA7133:
 429           case PCI_DEVICE_ID_PHILIPS_SAA7135:
 430                 if (1 == runtime->channels)
 431                         fmt |= (1 << 4);
 432                 if (2 == runtime->channels)
 433                         fmt |= (2 << 4);
 434                 if (!sign)
 435                         fmt |= 0x04;
 436                 saa_writel(SAA7133_NUM_SAMPLES, dev->dmasound.blksize -1);
 437                 saa_writel(SAA7133_AUDIO_CHANNEL, 0x543210 | (fmt << 24));
 438                 break;
 439         }
 440
 441         dprintk("rec_start: afmt=%d ch=%d  =>  fmt=0x%x swap=%c\n",
 442                 runtime->format, runtime->channels, fmt,
 443                 bswap ? 'b' : '-');
 444         /* dma: setup channel 6 (= AUDIO) */
 445         control = SAA7134_RS_CONTROL_BURST_16 |
 446                 SAA7134_RS_CONTROL_ME |
 447                 (dev->dmasound.pt.dma >> 12);
 448         if (bswap)
 449                 control |= SAA7134_RS_CONTROL_BSWAP;
 450
 451         /* I should be able to use runtime->dma_addr in the control
 452            byte, but it doesn't work. So I allocate the DMA using the
 453            V4L functions, and force ALSA to use that as the DMA area */
 454
 455         runtime->dma_area = dev->dmasound.dma.vmalloc;
 456
 457         saa_writel(SAA7134_RS_BA1(6),0);
 458         saa_writel(SAA7134_RS_BA2(6),dev->dmasound.blksize);
 459         saa_writel(SAA7134_RS_PITCH(6),0);
 460         saa_writel(SAA7134_RS_CONTROL(6),control);
 461
 462         dev->dmasound.rate = runtime->rate;
 463
 464         return 0;
 465  fail2:
 466         saa7134_pgtable_free(dev->pci,&dev->dmasound.pt);
 467  fail1:
 468         videobuf_dma_pci_unmap(dev->pci,&dev->dmasound.dma);
 469         return err;
 470
 471
 472 }
 473
 474 /*
 475  * ALSA pointer fetching
 476  *
 477  *   - One of the ALSA capture callbacks.
 478  *
 479  *   Called whenever a period elapses, it must return the current hardware
 480  *  position of the buffer.
 481  *   Also resets the read counter used to prevent overruns
 482  *
 483  */
 484
 485 static snd_pcm_uframes_t snd_card_saa7134_capture_pointer(snd_pcm_substream_t * substream)
 486 {
 487         snd_pcm_runtime_t *runtime = substream->runtime;
 488         snd_card_saa7134_pcm_t *pcm = runtime->private_data;
 489         struct saa7134_dev *dev=pcm->dev;
 490
 491         if (dev->dmasound.read_count) {
 492                 dev->dmasound.read_count  -= snd_pcm_lib_period_bytes(substream);
 493                 dev->dmasound.read_offset += snd_pcm_lib_period_bytes(substream);
 494                 if (dev->dmasound.read_offset == dev->dmasound.bufsize)
 495                         dev->dmasound.read_offset = 0;
 496         }
 497
 498         return bytes_to_frames(runtime, dev->dmasound.read_offset);
 499 }
 500
 501 /*
 502  * ALSA hardware capabilities definition
 503  */
 504
 505 static snd_pcm_hardware_t snd_card_saa7134_capture =
 506 {
 507         .info =                 (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
 508                                  SNDRV_PCM_INFO_BLOCK_TRANSFER |
 509                                  SNDRV_PCM_INFO_MMAP_VALID),
 510         .formats =              SNDRV_PCM_FMTBIT_S16_LE | \
 511                                 SNDRV_PCM_FMTBIT_S16_BE | \
 512                                 SNDRV_PCM_FMTBIT_S8 | \
 513                                 SNDRV_PCM_FMTBIT_U8 | \
 514                                 SNDRV_PCM_FMTBIT_U16_LE | \
 515                                 SNDRV_PCM_FMTBIT_U16_BE,
 516         .rates =                SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_48000,
 517         .rate_min =             32000,
 518         .rate_max =             48000,
 519         .channels_min =         1,
 520         .channels_max =         2,
 521         .buffer_bytes_max =     (256*1024),
 522         .period_bytes_min =     64,
 523         .period_bytes_max =     (256*1024),
 524         .periods_min =          2,
 525         .periods_max =          1024,
 526 };
 527
 528 static void snd_card_saa7134_runtime_free(snd_pcm_runtime_t *runtime)
 529 {
 530         snd_card_saa7134_pcm_t *pcm = runtime->private_data;
 531
 532         kfree(pcm);
 533 }
 534
 535
 536 /*
 537  * ALSA hardware params
 538  *
 539  *   - One of the ALSA capture callbacks.
 540  *
 541  *   Called on initialization, right before the PCM preparation
 542  *   Usually used in ALSA to allocate the DMA, but since we don't use the
 543  *  ALSA DMA it does nothing
 544  *
 545  */
 546
 547 static int snd_card_saa7134_hw_params(snd_pcm_substream_t * substream,
 548                                     snd_pcm_hw_params_t * hw_params)
 549 {
 550         return 0;
 551
 552 }
 553
 554 /*
 555  * ALSA hardware release
 556  *
 557  *   - One of the ALSA capture callbacks.
 558  *
 559  *   Called after closing the device, but before snd_card_saa7134_capture_close
 560  *   Usually used in ALSA to free the DMA, but since we don't use the
 561  *  ALSA DMA it does nothing
 562  *
 563  */
 564
 565 static int snd_card_saa7134_hw_free(snd_pcm_substream_t * substream)
 566 {
 567         return 0;
 568 }
 569
 570 /*
 571  * DMA buffer release
 572  *
 573  *   Called after closing the device, during snd_card_saa7134_capture_close
 574  *
 575  */
 576
 577 static int dsp_buffer_free(struct saa7134_dev *dev)
 578 {
 579         if (!dev->dmasound.blksize)
 580                 BUG();
 581
 582         videobuf_dma_free(&dev->dmasound.dma);
 583
 584         dev->dmasound.blocks  = 0;
 585         dev->dmasound.blksize = 0;
 586         dev->dmasound.bufsize = 0;
 587
 588         return 0;
 589 }
 590
 591 /*
 592  * ALSA capture finish
 593  *
 594  *   - One of the ALSA capture callbacks.
 595  *
 596  *   Called after closing the device. It stops the DMA audio and releases
 597  *  the buffers
 598  *
 599  */
 600
 601 static int snd_card_saa7134_capture_close(snd_pcm_substream_t * substream)
 602 {
 603         snd_card_saa7134_t *chip = snd_pcm_substream_chip(substream);
 604         struct saa7134_dev *dev = chip->dev;
 605
 606         /* unlock buffer */
 607         saa7134_pgtable_free(dev->pci,&dev->dmasound.pt);
 608         videobuf_dma_pci_unmap(dev->pci,&dev->dmasound.dma);
 609
 610         dsp_buffer_free(dev);
 611         return 0;
 612 }
 613
 614 /*
 615  * ALSA capture start
 616  *
 617  *   - One of the ALSA capture callbacks.
 618  *
 619  *   Called when opening the device. It creates and populates the PCM
 620  *  structure
 621  *
 622  */
 623
 624 static int snd_card_saa7134_capture_open(snd_pcm_substream_t * substream)
 625 {
 626         snd_pcm_runtime_t *runtime = substream->runtime;
 627         snd_card_saa7134_pcm_t *pcm;
 628         snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
 629         struct saa7134_dev *dev = saa7134->dev;
 630         int err;
 631
 632         down(&dev->dmasound.lock);
 633
 634         dev->dmasound.read_count  = 0;
 635         dev->dmasound.read_offset = 0;
 636
 637         up(&dev->dmasound.lock);
 638
 639         pcm = kzalloc(sizeof(*pcm), GFP_KERNEL);
 640         if (pcm == NULL)
 641                 return -ENOMEM;
 642
 643         pcm->dev=saa7134->dev;
 644
 645         spin_lock_init(&pcm->lock);
 646
 647         pcm->substream = substream;
 648         runtime->private_data = pcm;
 649         runtime->private_free = snd_card_saa7134_runtime_free;
 650         runtime->hw = snd_card_saa7134_capture;
 651
 652         if ((err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
 653                 return err;
 654
 655         return 0;
 656 }
 657
 658 /*
 659  * ALSA capture callbacks definition
 660  */
 661
 662 static snd_pcm_ops_t snd_card_saa7134_capture_ops = {
 663         .open =                 snd_card_saa7134_capture_open,
 664         .close =                snd_card_saa7134_capture_close,
 665         .ioctl =                snd_pcm_lib_ioctl,
 666         .hw_params =            snd_card_saa7134_hw_params,
 667         .hw_free =              snd_card_saa7134_hw_free,
 668         .prepare =              snd_card_saa7134_capture_prepare,
 669         .trigger =              snd_card_saa7134_capture_trigger,
 670         .pointer =              snd_card_saa7134_capture_pointer,
 671 };
 672
 673 /*
 674  * ALSA PCM setup
 675  *
 676  *   Called when initializing the board. Sets up the name and hooks up
 677  *  the callbacks
 678  *
 679  */
 680
 681 static int snd_card_saa7134_pcm(snd_card_saa7134_t *saa7134, int device)
 682 {
 683         snd_pcm_t *pcm;
 684         int err;
 685
 686         if ((err = snd_pcm_new(saa7134->card, "SAA7134 PCM", device, 0, 1, &pcm)) < 0)
 687                 return err;
 688         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_card_saa7134_capture_ops);
 689         pcm->private_data = saa7134;
 690         pcm->info_flags = 0;
 691         strcpy(pcm->name, "SAA7134 PCM");
 692         return 0;
 693 }
 694
 695 #define SAA713x_VOLUME(xname, xindex, addr) \
 696 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
 697   .info = snd_saa7134_volume_info, \
 698   .get = snd_saa7134_volume_get, .put = snd_saa7134_volume_put, \
 699   .private_value = addr }
 700
 701 static int snd_saa7134_volume_info(snd_kcontrol_t * kcontrol, snd_ctl_elem_info_t * uinfo)
 702 {
 703         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 704         uinfo->count = 2;
 705         uinfo->value.integer.min = 0;
 706         uinfo->value.integer.max = 20;
 707         return 0;
 708 }
 709
 710 static int snd_saa7134_volume_get(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
 711 {
 712         snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol);
 713         int addr = kcontrol->private_value;
 714
 715         ucontrol->value.integer.value[0] = chip->mixer_volume[addr][0];
 716         ucontrol->value.integer.value[1] = chip->mixer_volume[addr][1];
 717         return 0;
 718 }
 719
 720 static int snd_saa7134_volume_put(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
 721 {
 722         snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol);
 723         unsigned long flags;
 724         int change, addr = kcontrol->private_value;
 725         int left, right;
 726
 727         left = ucontrol->value.integer.value[0];
 728         if (left < 0)
 729                 left = 0;
 730         if (left > 20)
 731                 left = 20;
 732         right = ucontrol->value.integer.value[1];
 733         if (right < 0)
 734                 right = 0;
 735         if (right > 20)
 736                 right = 20;
 737         spin_lock_irqsave(&chip->mixer_lock, flags);
 738         change = chip->mixer_volume[addr][0] != left ||
 739                  chip->mixer_volume[addr][1] != right;
 740         chip->mixer_volume[addr][0] = left;
 741         chip->mixer_volume[addr][1] = right;
 742         spin_unlock_irqrestore(&chip->mixer_lock, flags);
 743         return change;
 744 }
 745
 746 #define SAA713x_CAPSRC(xname, xindex, addr) \
 747 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
 748   .info = snd_saa7134_capsrc_info, \
 749   .get = snd_saa7134_capsrc_get, .put = snd_saa7134_capsrc_put, \
 750   .private_value = addr }
 751
 752 static int snd_saa7134_capsrc_info(snd_kcontrol_t * kcontrol, snd_ctl_elem_info_t * uinfo)
 753 {
 754         uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
 755         uinfo->count = 2;
 756         uinfo->value.integer.min = 0;
 757         uinfo->value.integer.max = 1;
 758         return 0;
 759 }
 760
 761 static int snd_saa7134_capsrc_get(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
 762 {
 763         snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol);
 764         unsigned long flags;
 765         int addr = kcontrol->private_value;
 766
 767         spin_lock_irqsave(&chip->mixer_lock, flags);
 768         ucontrol->value.integer.value[0] = chip->capture_source[addr][0];
 769         ucontrol->value.integer.value[1] = chip->capture_source[addr][1];
 770         spin_unlock_irqrestore(&chip->mixer_lock, flags);
 771
 772         return 0;
 773 }
 774
 775 static int snd_saa7134_capsrc_put(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
 776 {
 777         snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol);
 778         int change, addr = kcontrol->private_value;
 779         int left, right;
 780         u32 anabar, xbarin;
 781         int analog_io, rate;
 782         struct saa7134_dev *dev;
 783
 784         dev = chip->dev;
 785
 786         left = ucontrol->value.integer.value[0] & 1;
 787         right = ucontrol->value.integer.value[1] & 1;
 788         spin_lock_irq(&chip->mixer_lock);
 789
 790         change = chip->capture_source[addr][0] != left ||
 791                  chip->capture_source[addr][1] != right;
 792         chip->capture_source[addr][0] = left;
 793         chip->capture_source[addr][1] = right;
 794         dev->dmasound.input=addr;
 795         spin_unlock_irq(&chip->mixer_lock);
 796
 797
 798         if (change) {
 799           switch (dev->pci->device) {
 800
 801            case PCI_DEVICE_ID_PHILIPS_SAA7134:
 802                 switch (addr) {
 803                         case MIXER_ADDR_TVTUNER:
 804                                 saa_andorb(SAA7134_AUDIO_FORMAT_CTRL, 0xc0, 0xc0);
 805                                 saa_andorb(SAA7134_SIF_SAMPLE_FREQ,   0x03, 0x00);
 806                                 break;
 807                         case MIXER_ADDR_LINE1:
 808                         case MIXER_ADDR_LINE2:
 809                                 analog_io = (MIXER_ADDR_LINE1 == addr) ? 0x00 : 0x08;
 810                                 rate = (32000 == dev->dmasound.rate) ? 0x01 : 0x03;
 811                                 saa_andorb(SAA7134_ANALOG_IO_SELECT,  0x08, analog_io);
 812                                 saa_andorb(SAA7134_AUDIO_FORMAT_CTRL, 0xc0, 0x80);
 813                                 saa_andorb(SAA7134_SIF_SAMPLE_FREQ,   0x03, rate);
 814                                 break;
 815                 }
 816
 817                 break;
 818            case PCI_DEVICE_ID_PHILIPS_SAA7133:
 819            case PCI_DEVICE_ID_PHILIPS_SAA7135:
 820                 xbarin = 0x03; // adc
 821                 anabar = 0;
 822                 switch (addr) {
 823                         case MIXER_ADDR_TVTUNER:
 824                                 xbarin = 0; // Demodulator
 825                                 anabar = 2; // DACs
 826                                 break;
 827                         case MIXER_ADDR_LINE1:
 828                                 anabar = 0;  // aux1, aux1
 829                                 break;
 830                         case MIXER_ADDR_LINE2:
 831                                 anabar = 9;  // aux2, aux2
 832                                 break;
 833                 }
 834
 835                 /* output xbar always main channel */
 836                 saa_dsp_writel(dev, SAA7133_DIGITAL_OUTPUT_SEL1, 0xbbbb10);
 837
 838                 if (left || right) { // We've got data, turn the input on
 839                   saa_dsp_writel(dev, SAA7133_DIGITAL_INPUT_XBAR1, xbarin);
 840                   saa_writel(SAA7133_ANALOG_IO_SELECT, anabar);
 841                 } else {
 842                   saa_dsp_writel(dev, SAA7133_DIGITAL_INPUT_XBAR1, 0);
 843                   saa_writel(SAA7133_ANALOG_IO_SELECT, 0);
 844                 }
 845                 break;
 846           }
 847         }
 848
 849         return change;
 850 }
 851
 852 static snd_kcontrol_new_t snd_saa7134_controls[] = {
 853 SAA713x_VOLUME("Video Volume", 0, MIXER_ADDR_TVTUNER),
 854 SAA713x_CAPSRC("Video Capture Switch", 0, MIXER_ADDR_TVTUNER),
 855 SAA713x_VOLUME("Line Volume", 1, MIXER_ADDR_LINE1),
 856 SAA713x_CAPSRC("Line Capture Switch", 1, MIXER_ADDR_LINE1),
 857 SAA713x_VOLUME("Line Volume", 2, MIXER_ADDR_LINE2),
 858 SAA713x_CAPSRC("Line Capture Switch", 2, MIXER_ADDR_LINE2),
 859 };
 860
 861 /*
 862  * ALSA mixer setup
 863  *
 864  *   Called when initializing the board. Sets up the name and hooks up
 865  *  the callbacks
 866  *
 867  */
 868
 869 static int snd_card_saa7134_new_mixer(snd_card_saa7134_t * chip)
 870 {
 871         snd_card_t *card = chip->card;
 872         unsigned int idx;
 873         int err;
 874
 875         snd_assert(chip != NULL, return -EINVAL);
 876         strcpy(card->mixername, "SAA7134 Mixer");
 877
 878         for (idx = 0; idx < ARRAY_SIZE(snd_saa7134_controls); idx++) {
 879                 if ((err = snd_ctl_add(card, snd_ctl_new1(&snd_saa7134_controls[idx], chip))) < 0)
 880                         return err;
 881         }
 882         return 0;
 883 }
 884
 885 static void snd_saa7134_free(snd_card_t * card)
 886 {
 887         return;
 888 }
 889
 890 static int snd_saa7134_dev_free(snd_device_t *device)
 891 {
 892         snd_card_saa7134_t *chip = device->device_data;
 893
 894         if (chip->dev->dmasound.priv_data == NULL)
 895                 return 0;
 896
 897         if (chip->irq >= 0) {
 898                 synchronize_irq(chip->irq);
 899                 free_irq(chip->irq, &chip->dev->dmasound);
 900         }
 901
 902         chip->dev->dmasound.priv_data = NULL;
 903
 904         return 0;
 905 }
 906
 907 /*
 908  * ALSA initialization
 909  *
 910  *   Called by the init routine, once for each saa7134 device present,
 911  *  it creates the basic structures and registers the ALSA devices
 912  *
 913  */
 914
 915 int alsa_card_saa7134_create(struct saa7134_dev *dev, int devnum)
 916 {
 917
 918         snd_card_t *card;
 919         snd_card_saa7134_t *chip;
 920         int err;
 921         static snd_device_ops_t ops = {
 922                 .dev_free =     snd_saa7134_dev_free,
 923         };
 924
 925
 926         if (devnum >= SNDRV_CARDS)
 927                 return -ENODEV;
 928         if (!enable[devnum])
 929                 return -ENODEV;
 930
 931         card = snd_card_new(index[devnum], id[devnum], THIS_MODULE, sizeof(snd_card_saa7134_t));
 932
 933         if (card == NULL)
 934                 return -ENOMEM;
 935
 936         strcpy(card->driver, "SAA7134");
 937
 938         /* Card "creation" */
 939
 940         card->private_free = snd_saa7134_free;
 941         chip = (snd_card_saa7134_t *) card->private_data;
 942
 943         spin_lock_init(&chip->lock);
 944         spin_lock_init(&chip->mixer_lock);
 945
 946         chip->dev = dev;
 947
 948         chip->card = card;
 949
 950         chip->pci = dev->pci;
 951         chip->irq = dev->pci->irq;
 952         chip->iobase = pci_resource_start(dev->pci, 0);
 953
 954
 955         err = request_irq(dev->pci->irq, saa7134_alsa_irq,
 956                                 SA_SHIRQ | SA_INTERRUPT, dev->name,
 957                                 (void*) &dev->dmasound);
 958
 959         if (err < 0) {
 960                 printk(KERN_ERR "%s: can't get IRQ %d for ALSA\n",
 961                         dev->name, dev->pci->irq);
 962                 goto __nodev;
 963         }
 964
 965         init_MUTEX(&dev->dmasound.lock);
 966
 967         if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
 968                 goto __nodev;
 969         }
 970
 971         if ((err = snd_card_saa7134_new_mixer(chip)) < 0)
 972                 goto __nodev;
 973
 974         if ((err = snd_card_saa7134_pcm(chip, 0)) < 0)
 975                 goto __nodev;
 976
 977         snd_card_set_dev(card, &chip->pci->dev);
 978
 979         /* End of "creation" */
 980
 981         strcpy(card->shortname, "SAA7134");
 982         sprintf(card->longname, "%s at 0x%lx irq %d",
 983                 chip->dev->name, chip->iobase, chip->irq);
 984
 985         if ((err = snd_card_register(card)) == 0) {
 986                 snd_saa7134_cards[devnum] = card;
 987                 return 0;
 988         }
 989
 990 __nodev:
 991         snd_card_free(card);
 992         return err;
 993 }
 994
 995 /*
 996  * Module initializer
 997  *
 998  * Loops through present saa7134 cards, and assigns an ALSA device
 999  * to each one
1000  *
1001  */
1002
1003 static int saa7134_alsa_init(void)
1004 {
1005         struct saa7134_dev *dev = NULL;
1006         struct list_head *list;
1007
1008         position = 0;
1009
1010         printk(KERN_INFO "saa7134 ALSA driver for DMA sound loaded\n");
1011
1012         list_for_each(list,&saa7134_devlist) {
1013                 dev = list_entry(list, struct saa7134_dev, devlist);
1014                 if (dev->dmasound.priv_data == NULL) {
1015                         dev->dmasound.priv_data = dev;
1016                         alsa_card_saa7134_create(dev,position);
1017                         position++;
1018                 } else {
1019                         printk(KERN_ERR "saa7134 ALSA: DMA sound is being handled by OSS. ignoring %s\n",dev->name);
1020                         return -EBUSY;
1021                 }
1022         }
1023
1024         if (dev == NULL)
1025                 printk(KERN_INFO "saa7134 ALSA: no saa7134 cards found\n");
1026
1027         return 0;
1028 }
1029
1030 /*
1031  * Module destructor
1032  */
1033
1034 void saa7134_alsa_exit(void)
1035 {
1036         int idx;
1037
1038         for (idx = 0; idx < SNDRV_CARDS; idx++) {
1039                 snd_card_free(snd_saa7134_cards[idx]);
1040         }
1041
1042         printk(KERN_INFO "saa7134 ALSA driver for DMA sound unloaded\n");
1043
1044         return;
1045 }
1046
1047 module_init(saa7134_alsa_init);
1048 module_exit(saa7134_alsa_exit);
1049 MODULE_LICENSE("GPL");
1050 MODULE_AUTHOR("Ricardo Cerqueira");