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 *saadev;
  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 *saadev;
  90
  91         spinlock_t lock;
  92         unsigned int pcm_size;          /* buffer size */
  93         unsigned int pcm_count;         /* bytes per period */
  94         unsigned int pcm_bps;           /* bytes per second */
  95         snd_pcm_substream_t *substream;
  96 } snd_card_saa7134_pcm_t;
  97
  98 static snd_card_t *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 void saa7134_irq_alsa_done(struct saa7134_dev *dev, unsigned long status)
 145 {
 146         int next_blk, reg = 0;
 147
 148         spin_lock(&dev->slock);
 149         if (UNSET == dev->dmasound.dma_blk) {
 150                 dprintk("irq: recording stopped\n");
 151                 goto done;
 152         }
 153         if (0 != (status & 0x0f000000))
 154                 dprintk("irq: lost %ld\n", (status >> 24) & 0x0f);
 155         if (0 == (status & 0x10000000)) {
 156                 /* odd */
 157                 if (0 == (dev->dmasound.dma_blk & 0x01))
 158                         reg = SAA7134_RS_BA1(6);
 159         } else {
 160                 /* even */
 161                 if (1 == (dev->dmasound.dma_blk & 0x01))
 162                         reg = SAA7134_RS_BA2(6);
 163         }
 164         if (0 == reg) {
 165                 dprintk("irq: field oops [%s]\n",
 166                         (status & 0x10000000) ? "even" : "odd");
 167                 goto done;
 168         }
 169
 170         if (dev->dmasound.read_count >= dev->dmasound.blksize * (dev->dmasound.blocks-2)) {
 171                 dprintk("irq: overrun [full=%d/%d] - Blocks in %d\n",dev->dmasound.read_count,
 172                         dev->dmasound.bufsize, dev->dmasound.blocks);
 173                 snd_pcm_stop(dev->dmasound.substream,SNDRV_PCM_STATE_XRUN);
 174                 goto done;
 175         }
 176
 177         /* next block addr */
 178         next_blk = (dev->dmasound.dma_blk + 2) % dev->dmasound.blocks;
 179         saa_writel(reg,next_blk * dev->dmasound.blksize);
 180         if (debug > 2)
 181                 dprintk("irq: ok, %s, next_blk=%d, addr=%x, blocks=%u, size=%u, read=%u\n",
 182                         (status & 0x10000000) ? "even" : "odd ", next_blk,
 183                         next_blk * dev->dmasound.blksize, dev->dmasound.blocks, dev->dmasound.blksize, dev->dmasound.read_count);
 184
 185         /* update status & wake waiting readers */
 186         dev->dmasound.dma_blk = (dev->dmasound.dma_blk + 1) % dev->dmasound.blocks;
 187         dev->dmasound.read_count += dev->dmasound.blksize;
 188
 189         dev->dmasound.recording_on = reg;
 190
 191         if (dev->dmasound.read_count >= snd_pcm_lib_period_bytes(dev->dmasound.substream)) {
 192                 spin_unlock(&dev->slock);
 193                 snd_pcm_period_elapsed(dev->dmasound.substream);
 194                 spin_lock(&dev->slock);
 195         }
 196  done:
 197         spin_unlock(&dev->slock);
 198
 199 }
 200
 201 /*
 202  * IRQ request handler
 203  *
 204  *   Runs along with saa7134's IRQ handler, discards anything that isn't
 205  *   DMA sound
 206  *
 207  */
 208
 209 static irqreturn_t saa7134_alsa_irq(int irq, void *dev_id, struct pt_regs *regs)
 210 {
 211         snd_card_saa7134_t *saa7134 = dev_id;
 212         struct saa7134_dev *dev = saa7134->saadev;
 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 *saapcm = runtime->private_data;
 252         struct saa7134_dev *dev=saapcm->saadev;
 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         if (!dev->dmasound.bufsize)
 319                 BUG();
 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 *saapcm = runtime->private_data;
 348         unsigned int bps;
 349         unsigned long size;
 350         unsigned count;
 351
 352         size = snd_pcm_lib_buffer_bytes(substream);
 353         count = snd_pcm_lib_period_bytes(substream);
 354
 355         saapcm->saadev->dmasound.substream = substream;
 356         bps = runtime->rate * runtime->channels;
 357         bps *= snd_pcm_format_width(runtime->format);
 358         bps /= 8;
 359         if (bps <= 0)
 360                 return -EINVAL;
 361         saapcm->pcm_bps = bps;
 362         saapcm->pcm_size = snd_pcm_lib_buffer_bytes(substream);
 363         saapcm->pcm_count = snd_pcm_lib_period_bytes(substream);
 364
 365
 366         dev=saa7134->saadev;
 367
 368         dsp_buffer_conf(dev,saapcm->pcm_count,(saapcm->pcm_size/saapcm->pcm_count));
 369
 370         err = dsp_buffer_init(dev);
 371         if (0 != err)
 372                 return err;
 373
 374         /* prepare buffer */
 375         if (0 != (err = videobuf_dma_pci_map(dev->pci,&dev->dmasound.dma)))
 376                 return err;
 377         if (0 != (err = saa7134_pgtable_alloc(dev->pci,&dev->dmasound.pt)))
 378                 goto fail1;
 379         if (0 != (err = saa7134_pgtable_build(dev->pci,&dev->dmasound.pt,
 380                                               dev->dmasound.dma.sglist,
 381                                               dev->dmasound.dma.sglen,
 382                                               0)))
 383                 goto fail2;
 384
 385
 386
 387         switch (runtime->format) {
 388           case SNDRV_PCM_FORMAT_U8:
 389           case SNDRV_PCM_FORMAT_S8:
 390                 fmt = 0x00;
 391                 break;
 392           case SNDRV_PCM_FORMAT_U16_LE:
 393           case SNDRV_PCM_FORMAT_U16_BE:
 394           case SNDRV_PCM_FORMAT_S16_LE:
 395           case SNDRV_PCM_FORMAT_S16_BE:
 396                 fmt = 0x01;
 397                 break;
 398           default:
 399                 err = -EINVAL;
 400                 return 1;
 401         }
 402
 403         switch (runtime->format) {
 404           case SNDRV_PCM_FORMAT_S8:
 405           case SNDRV_PCM_FORMAT_S16_LE:
 406           case SNDRV_PCM_FORMAT_S16_BE:
 407                 sign = 1;
 408                 break;
 409           default:
 410                 sign = 0;
 411                 break;
 412         }
 413
 414         switch (runtime->format) {
 415           case SNDRV_PCM_FORMAT_U16_BE:
 416           case SNDRV_PCM_FORMAT_S16_BE:
 417                 bswap = 1; break;
 418           default:
 419                 bswap = 0; break;
 420         }
 421
 422         switch (dev->pci->device) {
 423           case PCI_DEVICE_ID_PHILIPS_SAA7134:
 424                 if (1 == runtime->channels)
 425                         fmt |= (1 << 3);
 426                 if (2 == runtime->channels)
 427                         fmt |= (3 << 3);
 428                 if (sign)
 429                         fmt |= 0x04;
 430
 431                 fmt |= (MIXER_ADDR_TVTUNER == dev->dmasound.input) ? 0xc0 : 0x80;
 432                 saa_writeb(SAA7134_NUM_SAMPLES0, ((dev->dmasound.blksize - 1) & 0x0000ff));
 433                 saa_writeb(SAA7134_NUM_SAMPLES1, ((dev->dmasound.blksize - 1) & 0x00ff00) >>  8);
 434                 saa_writeb(SAA7134_NUM_SAMPLES2, ((dev->dmasound.blksize - 1) & 0xff0000) >> 16);
 435                 saa_writeb(SAA7134_AUDIO_FORMAT_CTRL, fmt);
 436
 437                 break;
 438           case PCI_DEVICE_ID_PHILIPS_SAA7133:
 439           case PCI_DEVICE_ID_PHILIPS_SAA7135:
 440                 if (1 == runtime->channels)
 441                         fmt |= (1 << 4);
 442                 if (2 == runtime->channels)
 443                         fmt |= (2 << 4);
 444                 if (!sign)
 445                         fmt |= 0x04;
 446                 saa_writel(SAA7133_NUM_SAMPLES, dev->dmasound.blksize -1);
 447                 saa_writel(SAA7133_AUDIO_CHANNEL, 0x543210 | (fmt << 24));
 448                 //saa_writel(SAA7133_AUDIO_CHANNEL, 0x543210);
 449                 break;
 450         }
 451
 452         dprintk("rec_start: afmt=%d ch=%d  =>  fmt=0x%x swap=%c\n",
 453                 runtime->format, runtime->channels, fmt,
 454                 bswap ? 'b' : '-');
 455         /* dma: setup channel 6 (= AUDIO) */
 456         control = SAA7134_RS_CONTROL_BURST_16 |
 457                 SAA7134_RS_CONTROL_ME |
 458                 (dev->dmasound.pt.dma >> 12);
 459         if (bswap)
 460                 control |= SAA7134_RS_CONTROL_BSWAP;
 461
 462         /* I should be able to use runtime->dma_addr in the control
 463            byte, but it doesn't work. So I allocate the DMA using the
 464            V4L functions, and force ALSA to use that as the DMA area */
 465
 466         runtime->dma_area = dev->dmasound.dma.vmalloc;
 467
 468         saa_writel(SAA7134_RS_BA1(6),0);
 469         saa_writel(SAA7134_RS_BA2(6),dev->dmasound.blksize);
 470         saa_writel(SAA7134_RS_PITCH(6),0);
 471         saa_writel(SAA7134_RS_CONTROL(6),control);
 472
 473         dev->dmasound.rate = runtime->rate;
 474
 475         return 0;
 476  fail2:
 477         saa7134_pgtable_free(dev->pci,&dev->dmasound.pt);
 478  fail1:
 479         videobuf_dma_pci_unmap(dev->pci,&dev->dmasound.dma);
 480         return err;
 481
 482
 483 }
 484
 485 /*
 486  * ALSA pointer fetching
 487  *
 488  *   - One of the ALSA capture callbacks.
 489  *
 490  *   Called whenever a period elapses, it must return the current hardware
 491  *  position of the buffer.
 492  *   Also resets the read counter used to prevent overruns
 493  *
 494  */
 495
 496 static snd_pcm_uframes_t snd_card_saa7134_capture_pointer(snd_pcm_substream_t * substream)
 497 {
 498         snd_pcm_runtime_t *runtime = substream->runtime;
 499         snd_card_saa7134_pcm_t *saapcm = runtime->private_data;
 500         struct saa7134_dev *dev=saapcm->saadev;
 501
 502
 503
 504         if (dev->dmasound.read_count) {
 505                 dev->dmasound.read_count  -= snd_pcm_lib_period_bytes(substream);
 506                 dev->dmasound.read_offset += snd_pcm_lib_period_bytes(substream);
 507                 if (dev->dmasound.read_offset == dev->dmasound.bufsize)
 508                         dev->dmasound.read_offset = 0;
 509         }
 510
 511         return bytes_to_frames(runtime, dev->dmasound.read_offset);
 512 }
 513
 514 /*
 515  * ALSA hardware capabilities definition
 516  */
 517
 518 static snd_pcm_hardware_t snd_card_saa7134_capture =
 519 {
 520         .info =                 (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
 521                                  SNDRV_PCM_INFO_BLOCK_TRANSFER |
 522                                  SNDRV_PCM_INFO_MMAP_VALID),
 523         .formats =              SNDRV_PCM_FMTBIT_S16_LE | \
 524                                 SNDRV_PCM_FMTBIT_S16_BE | \
 525                                 SNDRV_PCM_FMTBIT_S8 | \
 526                                 SNDRV_PCM_FMTBIT_U8 | \
 527                                 SNDRV_PCM_FMTBIT_U16_LE | \
 528                                 SNDRV_PCM_FMTBIT_U16_BE,
 529         .rates =                SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_48000,
 530         .rate_min =             32000,
 531         .rate_max =             48000,
 532         .channels_min =         1,
 533         .channels_max =         2,
 534         .buffer_bytes_max =     (256*1024),
 535         .period_bytes_min =     64,
 536         .period_bytes_max =     (256*1024),
 537         .periods_min =          2,
 538         .periods_max =          1024,
 539 };
 540
 541 static void snd_card_saa7134_runtime_free(snd_pcm_runtime_t *runtime)
 542 {
 543         snd_card_saa7134_pcm_t *saapcm = runtime->private_data;
 544
 545         kfree(saapcm);
 546 }
 547
 548
 549 /*
 550  * ALSA hardware params
 551  *
 552  *   - One of the ALSA capture callbacks.
 553  *
 554  *   Called on initialization, right before the PCM preparation
 555  *   Usually used in ALSA to allocate the DMA, but since we don't use the
 556  *  ALSA DMA it does nothing
 557  *
 558  */
 559
 560 static int snd_card_saa7134_hw_params(snd_pcm_substream_t * substream,
 561                                     snd_pcm_hw_params_t * hw_params)
 562 {
 563         return 0;
 564
 565 }
 566
 567 /*
 568  * ALSA hardware release
 569  *
 570  *   - One of the ALSA capture callbacks.
 571  *
 572  *   Called after closing the device, but before snd_card_saa7134_capture_close
 573  *   Usually used in ALSA to free the DMA, but since we don't use the
 574  *  ALSA DMA I'm almost sure this isn't necessary.
 575  *
 576  */
 577
 578 static int snd_card_saa7134_hw_free(snd_pcm_substream_t * substream)
 579 {
 580         return 0;
 581 }
 582
 583 /*
 584  * DMA buffer release
 585  *
 586  *   Called after closing the device, during snd_card_saa7134_capture_close
 587  *
 588  */
 589
 590 static int dsp_buffer_free(struct saa7134_dev *dev)
 591 {
 592         if (!dev->dmasound.blksize)
 593                 BUG();
 594
 595         videobuf_dma_free(&dev->dmasound.dma);
 596
 597         dev->dmasound.blocks  = 0;
 598         dev->dmasound.blksize = 0;
 599         dev->dmasound.bufsize = 0;
 600
 601         return 0;
 602 }
 603
 604 /*
 605  * ALSA capture finish
 606  *
 607  *   - One of the ALSA capture callbacks.
 608  *
 609  *   Called after closing the device. It stops the DMA audio and releases
 610  *  the buffers
 611  *
 612  */
 613
 614 static int snd_card_saa7134_capture_close(snd_pcm_substream_t * substream)
 615 {
 616         snd_card_saa7134_t *chip = snd_pcm_substream_chip(substream);
 617         struct saa7134_dev *dev = chip->saadev;
 618
 619         /* unlock buffer */
 620         saa7134_pgtable_free(dev->pci,&dev->dmasound.pt);
 621         videobuf_dma_pci_unmap(dev->pci,&dev->dmasound.dma);
 622
 623         dsp_buffer_free(dev);
 624         return 0;
 625 }
 626
 627 /*
 628  * ALSA capture start
 629  *
 630  *   - One of the ALSA capture callbacks.
 631  *
 632  *   Called when opening the device. It creates and populates the PCM
 633  *  structure
 634  *
 635  */
 636
 637 static int snd_card_saa7134_capture_open(snd_pcm_substream_t * substream)
 638 {
 639         snd_pcm_runtime_t *runtime = substream->runtime;
 640         snd_card_saa7134_pcm_t *saapcm;
 641         snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
 642         struct saa7134_dev *dev = saa7134->saadev;
 643         int err;
 644
 645         down(&dev->dmasound.lock);
 646
 647         dev->dmasound.afmt        = SNDRV_PCM_FORMAT_U8;
 648         dev->dmasound.channels    = 2;
 649         dev->dmasound.read_count  = 0;
 650         dev->dmasound.read_offset = 0;
 651
 652         up(&dev->dmasound.lock);
 653
 654         saapcm = kzalloc(sizeof(*saapcm), GFP_KERNEL);
 655         if (saapcm == NULL)
 656                 return -ENOMEM;
 657         saapcm->saadev=saa7134->saadev;
 658
 659         spin_lock_init(&saapcm->lock);
 660
 661         saapcm->substream = substream;
 662         runtime->private_data = saapcm;
 663         runtime->private_free = snd_card_saa7134_runtime_free;
 664         runtime->hw = snd_card_saa7134_capture;
 665
 666         if ((err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
 667                 return err;
 668
 669         return 0;
 670 }
 671
 672 /*
 673  * ALSA capture callbacks definition
 674  */
 675
 676 static snd_pcm_ops_t snd_card_saa7134_capture_ops = {
 677         .open =                 snd_card_saa7134_capture_open,
 678         .close =                snd_card_saa7134_capture_close,
 679         .ioctl =                snd_pcm_lib_ioctl,
 680         .hw_params =            snd_card_saa7134_hw_params,
 681         .hw_free =              snd_card_saa7134_hw_free,
 682         .prepare =              snd_card_saa7134_capture_prepare,
 683         .trigger =              snd_card_saa7134_capture_trigger,
 684         .pointer =              snd_card_saa7134_capture_pointer,
 685 };
 686
 687 /*
 688  * ALSA PCM setup
 689  *
 690  *   Called when initializing the board. Sets up the name and hooks up
 691  *  the callbacks
 692  *
 693  */
 694
 695 static int snd_card_saa7134_pcm(snd_card_saa7134_t *saa7134, int device)
 696 {
 697         snd_pcm_t *pcm;
 698         int err;
 699
 700         if ((err = snd_pcm_new(saa7134->card, "SAA7134 PCM", device, 0, 1, &pcm)) < 0)
 701                 return err;
 702         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_card_saa7134_capture_ops);
 703         pcm->private_data = saa7134;
 704         pcm->info_flags = 0;
 705         strcpy(pcm->name, "SAA7134 PCM");
 706         return 0;
 707 }
 708
 709 #define SAA713x_VOLUME(xname, xindex, addr) \
 710 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
 711   .info = snd_saa7134_volume_info, \
 712   .get = snd_saa7134_volume_get, .put = snd_saa7134_volume_put, \
 713   .private_value = addr }
 714
 715 static int snd_saa7134_volume_info(snd_kcontrol_t * kcontrol, snd_ctl_elem_info_t * uinfo)
 716 {
 717         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 718         uinfo->count = 2;
 719         uinfo->value.integer.min = 0;
 720         uinfo->value.integer.max = 20;
 721         return 0;
 722 }
 723
 724 static int snd_saa7134_volume_get(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
 725 {
 726         snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol);
 727         int addr = kcontrol->private_value;
 728
 729         ucontrol->value.integer.value[0] = chip->mixer_volume[addr][0];
 730         ucontrol->value.integer.value[1] = chip->mixer_volume[addr][1];
 731         return 0;
 732 }
 733
 734 static int snd_saa7134_volume_put(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
 735 {
 736         snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol);
 737         unsigned long flags;
 738         int change, addr = kcontrol->private_value;
 739         int left, right;
 740
 741         left = ucontrol->value.integer.value[0];
 742         if (left < 0)
 743                 left = 0;
 744         if (left > 20)
 745                 left = 20;
 746         right = ucontrol->value.integer.value[1];
 747         if (right < 0)
 748                 right = 0;
 749         if (right > 20)
 750                 right = 20;
 751         spin_lock_irqsave(&chip->mixer_lock, flags);
 752         change = chip->mixer_volume[addr][0] != left ||
 753                  chip->mixer_volume[addr][1] != right;
 754         chip->mixer_volume[addr][0] = left;
 755         chip->mixer_volume[addr][1] = right;
 756         spin_unlock_irqrestore(&chip->mixer_lock, flags);
 757         return change;
 758 }
 759
 760 #define SAA713x_CAPSRC(xname, xindex, addr) \
 761 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
 762   .info = snd_saa7134_capsrc_info, \
 763   .get = snd_saa7134_capsrc_get, .put = snd_saa7134_capsrc_put, \
 764   .private_value = addr }
 765
 766 static int snd_saa7134_capsrc_info(snd_kcontrol_t * kcontrol, snd_ctl_elem_info_t * uinfo)
 767 {
 768         uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
 769         uinfo->count = 2;
 770         uinfo->value.integer.min = 0;
 771         uinfo->value.integer.max = 1;
 772         return 0;
 773 }
 774
 775 static int snd_saa7134_capsrc_get(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
 776 {
 777         snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol);
 778         unsigned long flags;
 779         int addr = kcontrol->private_value;
 780
 781         spin_lock_irqsave(&chip->mixer_lock, flags);
 782         ucontrol->value.integer.value[0] = chip->capture_source[addr][0];
 783         ucontrol->value.integer.value[1] = chip->capture_source[addr][1];
 784         spin_unlock_irqrestore(&chip->mixer_lock, flags);
 785         return 0;
 786 }
 787
 788 static int snd_saa7134_capsrc_put(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
 789 {
 790         snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol);
 791         int change, addr = kcontrol->private_value;
 792         int left, right;
 793         u32 anabar, xbarin;
 794         int analog_io, rate;
 795         struct saa7134_dev *dev;
 796
 797         dev = chip->saadev;
 798
 799         left = ucontrol->value.integer.value[0] & 1;
 800         right = ucontrol->value.integer.value[1] & 1;
 801         spin_lock_irq(&chip->mixer_lock);
 802
 803         change = chip->capture_source[addr][0] != left ||
 804                  chip->capture_source[addr][1] != right;
 805         chip->capture_source[addr][0] = left;
 806         chip->capture_source[addr][1] = right;
 807         dev->dmasound.input=addr;
 808         spin_unlock_irq(&chip->mixer_lock);
 809
 810
 811         if (change) {
 812           switch (dev->pci->device) {
 813
 814            case PCI_DEVICE_ID_PHILIPS_SAA7134:
 815                 switch (addr) {
 816                         case MIXER_ADDR_TVTUNER:
 817                                 saa_andorb(SAA7134_AUDIO_FORMAT_CTRL, 0xc0, 0xc0);
 818                                 saa_andorb(SAA7134_SIF_SAMPLE_FREQ,   0x03, 0x00);
 819                                 break;
 820                         case MIXER_ADDR_LINE1:
 821                         case MIXER_ADDR_LINE2:
 822                                 analog_io = (MIXER_ADDR_LINE1 == addr) ? 0x00 : 0x08;
 823                                 rate = (32000 == dev->dmasound.rate) ? 0x01 : 0x03;
 824                                 saa_andorb(SAA7134_ANALOG_IO_SELECT,  0x08, analog_io);
 825                                 saa_andorb(SAA7134_AUDIO_FORMAT_CTRL, 0xc0, 0x80);
 826                                 saa_andorb(SAA7134_SIF_SAMPLE_FREQ,   0x03, rate);
 827                                 break;
 828                 }
 829
 830                 break;
 831            case PCI_DEVICE_ID_PHILIPS_SAA7133:
 832            case PCI_DEVICE_ID_PHILIPS_SAA7135:
 833                 xbarin = 0x03; // adc
 834                 anabar = 0;
 835                 switch (addr) {
 836                         case MIXER_ADDR_TVTUNER:
 837                                 xbarin = 0; // Demodulator
 838                                 anabar = 2; // DACs
 839                                 break;
 840                         case MIXER_ADDR_LINE1:
 841                                 anabar = 0;  // aux1, aux1
 842                                 break;
 843                         case MIXER_ADDR_LINE2:
 844                                 anabar = 9;  // aux2, aux2
 845                                 break;
 846                 }
 847
 848                 /* output xbar always main channel */
 849                 saa_dsp_writel(dev, SAA7133_DIGITAL_OUTPUT_SEL1, 0xbbbb10);
 850
 851                 if (left || right) { // We've got data, turn the input on
 852                   saa_dsp_writel(dev, SAA7133_DIGITAL_INPUT_XBAR1, xbarin);
 853                   saa_writel(SAA7133_ANALOG_IO_SELECT, anabar);
 854                 } else {
 855                   saa_dsp_writel(dev, SAA7133_DIGITAL_INPUT_XBAR1, 0);
 856                   saa_writel(SAA7133_ANALOG_IO_SELECT, 0);
 857                 }
 858                 break;
 859           }
 860         }
 861
 862         return change;
 863 }
 864
 865 static snd_kcontrol_new_t snd_saa7134_controls[] = {
 866 SAA713x_VOLUME("Video Volume", 0, MIXER_ADDR_TVTUNER),
 867 SAA713x_CAPSRC("Video Capture Switch", 0, MIXER_ADDR_TVTUNER),
 868 SAA713x_VOLUME("Line Volume", 1, MIXER_ADDR_LINE1),
 869 SAA713x_CAPSRC("Line Capture Switch", 1, MIXER_ADDR_LINE1),
 870 SAA713x_VOLUME("Line Volume", 2, MIXER_ADDR_LINE2),
 871 SAA713x_CAPSRC("Line Capture Switch", 2, MIXER_ADDR_LINE2),
 872 };
 873
 874 /*
 875  * ALSA mixer setup
 876  *
 877  *   Called when initializing the board. Sets up the name and hooks up
 878  *  the callbacks
 879  *
 880  */
 881
 882 static int snd_card_saa7134_new_mixer(snd_card_saa7134_t * chip)
 883 {
 884         snd_card_t *card = chip->card;
 885         unsigned int idx;
 886         int err;
 887
 888         snd_assert(chip != NULL, return -EINVAL);
 889         strcpy(card->mixername, "SAA7134 Mixer");
 890
 891         for (idx = 0; idx < ARRAY_SIZE(snd_saa7134_controls); idx++) {
 892                 if ((err = snd_ctl_add(card, snd_ctl_new1(&snd_saa7134_controls[idx], chip))) < 0)
 893                         return err;
 894         }
 895         return 0;
 896 }
 897
 898 static void snd_saa7134_free(snd_card_t * card)
 899 {
 900         return;
 901 }
 902
 903 static int snd_saa7134_dev_free(snd_device_t *device)
 904 {
 905         snd_card_saa7134_t *chip = device->device_data;
 906
 907         if (chip->irq >= 0) {
 908                 synchronize_irq(chip->irq);
 909                 free_irq(chip->irq, (void *) chip);
 910         }
 911
 912         return 0;
 913 }
 914
 915 /*
 916  * ALSA initialization
 917  *
 918  *   Called by the init routine, once for each saa7134 device present,
 919  *  it creates the basic structures and registers the ALSA devices
 920  *
 921  */
 922
 923 int alsa_card_saa7134_create(struct saa7134_dev *saadev, int dev)
 924 {
 925
 926         snd_card_t *card;
 927         snd_card_saa7134_t *chip;
 928         int err;
 929         static snd_device_ops_t ops = {
 930                 .dev_free =     snd_saa7134_dev_free,
 931         };
 932
 933
 934         if (dev >= SNDRV_CARDS)
 935                 return -ENODEV;
 936         if (!enable[dev])
 937                 return -ENODEV;
 938
 939         card = snd_card_new(index[dev], id[dev], THIS_MODULE, sizeof(snd_card_saa7134_t));
 940
 941         if (card == NULL)
 942                 return -ENOMEM;
 943
 944         strcpy(card->driver, "SAA7134");
 945
 946         /* Card "creation" */
 947
 948         card->private_free = snd_saa7134_free;
 949         chip = (snd_card_saa7134_t *) card->private_data;
 950
 951         spin_lock_init(&chip->lock);
 952         spin_lock_init(&chip->mixer_lock);
 953
 954         chip->saadev = saadev;
 955
 956         chip->card = card;
 957
 958         chip->pci = saadev->pci;
 959         chip->irq = saadev->pci->irq;
 960         chip->iobase = pci_resource_start(saadev->pci, 0);
 961
 962         err = request_irq(saadev->pci->irq, saa7134_alsa_irq,
 963                                 SA_SHIRQ | SA_INTERRUPT, saadev->name, (void *)chip);
 964
 965         if (err < 0) {
 966                 printk(KERN_ERR "%s: can't get IRQ %d for ALSA\n",
 967                         saadev->name, saadev->pci->irq);
 968                 goto __nodev;
 969         }
 970
 971         if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
 972                 goto __nodev;
 973         }
 974
 975         if ((err = snd_card_saa7134_new_mixer(chip)) < 0)
 976                 goto __nodev;
 977
 978         if ((err = snd_card_saa7134_pcm(chip, 0)) < 0)
 979                 goto __nodev;
 980
 981         snd_card_set_dev(card, &chip->pci->dev);
 982
 983         /* End of "creation" */
 984
 985         strcpy(card->shortname, "SAA7134");
 986         sprintf(card->longname, "%s at 0x%lx irq %d",
 987                 chip->saadev->name, chip->iobase, chip->irq);
 988
 989         if ((err = snd_card_register(card)) == 0) {
 990                 snd_saa7134_cards[dev] = card;
 991                 return 0;
 992         }
 993
 994 __nodev:
 995         snd_card_free(card);
 996         return err;
 997 }
 998
 999 /*
1000  * Module initializer
1001  *
1002  * Loops through present saa7134 cards, and assigns an ALSA device
1003  * to each one
1004  *
1005  */
1006
1007 static int saa7134_alsa_init(void)
1008 {
1009         struct saa7134_dev *saadev = NULL;
1010         struct list_head *list;
1011
1012         position = 0;
1013
1014         printk(KERN_INFO "saa7134 ALSA driver for DMA sound loaded\n");
1015
1016         list_for_each(list,&saa7134_devlist) {
1017                 saadev = list_entry(list, struct saa7134_dev, devlist);
1018                 alsa_card_saa7134_create(saadev,position);
1019                 position++;
1020         }
1021
1022         if (saadev == NULL)
1023                 printk(KERN_INFO "saa7134 ALSA: no saa7134 cards found\n");
1024
1025         return 0;
1026 }
1027
1028 /*
1029  * Module destructor
1030  */
1031
1032 void saa7134_alsa_exit(void)
1033 {
1034         int idx;
1035
1036         for (idx = 0; idx < SNDRV_CARDS; idx++) {
1037                 snd_card_free(snd_saa7134_cards[idx]);
1038         }
1039
1040         printk(KERN_INFO "saa7134 ALSA driver for DMA sound unloaded\n");
1041
1042         return;
1043 }
1044
1045 module_init(saa7134_alsa_init);
1046 module_exit(saa7134_alsa_exit);
1047 MODULE_LICENSE("GPL");
1048 MODULE_AUTHOR("Ricardo Cerqueira");