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_TVTUNER      0
  44 #define MIXER_ADDR_LINE1        1
  45 #define MIXER_ADDR_LINE2        2
  46 #define MIXER_ADDR_LAST         2
  47
  48
  49 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;      /* Index 0-MAX */
  50 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;       /* ID for this card */
  51 static int enable[SNDRV_CARDS] = {1, [1 ... (SNDRV_CARDS - 1)] = 1};
  52
  53 module_param_array(index, int, NULL, 0444);
  54 module_param_array(enable, int, NULL, 0444);
  55 MODULE_PARM_DESC(index, "Index value for SAA7134 capture interface(s).");
  56 MODULE_PARM_DESC(enable, "Enable (or not) the SAA7134 capture interface(s).");
  57
  58 #define dprintk(fmt, arg...)    if (debug) \
  59         printk(KERN_DEBUG "%s/alsa: " fmt, dev->name , ##arg)
  60
  61
  62
  63 /*
  64  * Main chip structure
  65  */
  66
  67 typedef struct snd_card_saa7134 {
  68         struct snd_card *card;
  69         spinlock_t mixer_lock;
  70         int mixer_volume[MIXER_ADDR_LAST+1][2];
  71         int capture_source[MIXER_ADDR_LAST+1][2];
  72         struct pci_dev *pci;
  73         struct saa7134_dev *dev;
  74
  75         unsigned long iobase;
  76         s16 irq;
  77         u16 mute_was_on;
  78
  79         spinlock_t lock;
  80 } snd_card_saa7134_t;
  81
  82
  83 /*
  84  * PCM structure
  85  */
  86
  87 typedef struct snd_card_saa7134_pcm {
  88         struct saa7134_dev *dev;
  89
  90         spinlock_t lock;
  91
  92         struct snd_pcm_substream *substream;
  93 } snd_card_saa7134_pcm_t;
  94
  95 static struct snd_card *snd_saa7134_cards[SNDRV_CARDS];
  96
  97
  98 /*
  99  * saa7134 DMA audio stop
 100  *
 101  *   Called when the capture device is released or the buffer overflows
 102  *
 103  *   - Copied verbatim from saa7134-oss's dsp_dma_stop.
 104  *
 105  */
 106
 107 static void saa7134_dma_stop(struct saa7134_dev *dev)
 108 {
 109         dev->dmasound.dma_blk     = -1;
 110         dev->dmasound.dma_running = 0;
 111         saa7134_set_dmabits(dev);
 112 }
 113
 114 /*
 115  * saa7134 DMA audio start
 116  *
 117  *   Called when preparing the capture device for use
 118  *
 119  *   - Copied verbatim from saa7134-oss's dsp_dma_start.
 120  *
 121  */
 122
 123 static void saa7134_dma_start(struct saa7134_dev *dev)
 124 {
 125         dev->dmasound.dma_blk     = 0;
 126         dev->dmasound.dma_running = 1;
 127         saa7134_set_dmabits(dev);
 128 }
 129
 130 /*
 131  * saa7134 audio DMA IRQ handler
 132  *
 133  *   Called whenever we get an SAA7134_IRQ_REPORT_DONE_RA3 interrupt
 134  *   Handles shifting between the 2 buffers, manages the read counters,
 135  *  and notifies ALSA when periods elapse
 136  *
 137  *   - Mostly copied from saa7134-oss's saa7134_irq_oss_done.
 138  *
 139  */
 140
 141 static void saa7134_irq_alsa_done(struct saa7134_dev *dev,
 142                                   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                 spin_unlock(&dev->slock);
 172                 snd_pcm_stop(dev->dmasound.substream,SNDRV_PCM_STATE_XRUN);
 173                 return;
 174         }
 175
 176         /* next block addr */
 177         next_blk = (dev->dmasound.dma_blk + 2) % dev->dmasound.blocks;
 178         saa_writel(reg,next_blk * dev->dmasound.blksize);
 179         if (debug > 2)
 180                 dprintk("irq: ok, %s, next_blk=%d, addr=%x, blocks=%u, size=%u, read=%u\n",
 181                         (status & 0x10000000) ? "even" : "odd ", next_blk,
 182                         next_blk * dev->dmasound.blksize, dev->dmasound.blocks, dev->dmasound.blksize, dev->dmasound.read_count);
 183
 184         /* update status & wake waiting readers */
 185         dev->dmasound.dma_blk = (dev->dmasound.dma_blk + 1) % dev->dmasound.blocks;
 186         dev->dmasound.read_count += dev->dmasound.blksize;
 187
 188         dev->dmasound.recording_on = reg;
 189
 190         if (dev->dmasound.read_count >= snd_pcm_lib_period_bytes(dev->dmasound.substream)) {
 191                 spin_unlock(&dev->slock);
 192                 snd_pcm_period_elapsed(dev->dmasound.substream);
 193                 spin_lock(&dev->slock);
 194         }
 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)
 210 {
 211         struct saa7134_dmasound *dmasound = dev_id;
 212         struct saa7134_dev *dev = dmasound->priv_data;
 213
 214         unsigned long report, status;
 215         int loop, handled = 0;
 216
 217         for (loop = 0; loop < 10; loop++) {
 218                 report = saa_readl(SAA7134_IRQ_REPORT);
 219                 status = saa_readl(SAA7134_IRQ_STATUS);
 220
 221                 if (report & SAA7134_IRQ_REPORT_DONE_RA3) {
 222                         handled = 1;
 223                         saa_writel(SAA7134_IRQ_REPORT,
 224                                    SAA7134_IRQ_REPORT_DONE_RA3);
 225                         saa7134_irq_alsa_done(dev, status);
 226                 } else {
 227                         goto out;
 228                 }
 229         }
 230
 231         if (loop == 10) {
 232                 dprintk("error! looping IRQ!");
 233         }
 234
 235 out:
 236         return IRQ_RETVAL(handled);
 237 }
 238
 239 /*
 240  * ALSA capture trigger
 241  *
 242  *   - One of the ALSA capture callbacks.
 243  *
 244  *   Called whenever a capture is started or stopped. Must be defined,
 245  *   but there's nothing we want to do here
 246  *
 247  */
 248
 249 static int snd_card_saa7134_capture_trigger(struct snd_pcm_substream * substream,
 250                                           int cmd)
 251 {
 252         struct snd_pcm_runtime *runtime = substream->runtime;
 253         snd_card_saa7134_pcm_t *pcm = runtime->private_data;
 254         struct saa7134_dev *dev=pcm->dev;
 255         int err = 0;
 256
 257         spin_lock(&dev->slock);
 258         if (cmd == SNDRV_PCM_TRIGGER_START) {
 259                 /* start dma */
 260                 saa7134_dma_start(dev);
 261         } else if (cmd == SNDRV_PCM_TRIGGER_STOP) {
 262                 /* stop dma */
 263                 saa7134_dma_stop(dev);
 264         } else {
 265                 err = -EINVAL;
 266         }
 267         spin_unlock(&dev->slock);
 268
 269         return err;
 270 }
 271
 272 /*
 273  * DMA buffer initialization
 274  *
 275  *   Uses V4L functions to initialize the DMA. Shouldn't be necessary in
 276  *  ALSA, but I was unable to use ALSA's own DMA, and had to force the
 277  *  usage of V4L's
 278  *
 279  *   - Copied verbatim from saa7134-oss.
 280  *
 281  */
 282
 283 static int dsp_buffer_init(struct saa7134_dev *dev)
 284 {
 285         int err;
 286
 287         BUG_ON(!dev->dmasound.bufsize);
 288
 289         videobuf_dma_init(&dev->dmasound.dma);
 290         err = videobuf_dma_init_kernel(&dev->dmasound.dma, PCI_DMA_FROMDEVICE,
 291                                        (dev->dmasound.bufsize + PAGE_SIZE) >> PAGE_SHIFT);
 292         if (0 != err)
 293                 return err;
 294         return 0;
 295 }
 296
 297 /*
 298  * DMA buffer release
 299  *
 300  *   Called after closing the device, during snd_card_saa7134_capture_close
 301  *
 302  */
 303
 304 static int dsp_buffer_free(struct saa7134_dev *dev)
 305 {
 306         BUG_ON(!dev->dmasound.blksize);
 307
 308         videobuf_dma_free(&dev->dmasound.dma);
 309
 310         dev->dmasound.blocks  = 0;
 311         dev->dmasound.blksize = 0;
 312         dev->dmasound.bufsize = 0;
 313
 314         return 0;
 315 }
 316
 317
 318 /*
 319  * ALSA PCM preparation
 320  *
 321  *   - One of the ALSA capture callbacks.
 322  *
 323  *   Called right after the capture device is opened, this function configures
 324  *  the buffer using the previously defined functions, allocates the memory,
 325  *  sets up the hardware registers, and then starts the DMA. When this function
 326  *  returns, the audio should be flowing.
 327  *
 328  */
 329
 330 static int snd_card_saa7134_capture_prepare(struct snd_pcm_substream * substream)
 331 {
 332         struct snd_pcm_runtime *runtime = substream->runtime;
 333         int bswap, sign;
 334         u32 fmt, control;
 335         snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
 336         struct saa7134_dev *dev;
 337         snd_card_saa7134_pcm_t *pcm = runtime->private_data;
 338
 339         pcm->dev->dmasound.substream = substream;
 340
 341         dev = saa7134->dev;
 342
 343         if (snd_pcm_format_width(runtime->format) == 8)
 344                 fmt = 0x00;
 345         else
 346                 fmt = 0x01;
 347
 348         if (snd_pcm_format_signed(runtime->format))
 349                 sign = 1;
 350         else
 351                 sign = 0;
 352
 353         if (snd_pcm_format_big_endian(runtime->format))
 354                 bswap = 1;
 355         else
 356                 bswap = 0;
 357
 358         switch (dev->pci->device) {
 359           case PCI_DEVICE_ID_PHILIPS_SAA7134:
 360                 if (1 == runtime->channels)
 361                         fmt |= (1 << 3);
 362                 if (2 == runtime->channels)
 363                         fmt |= (3 << 3);
 364                 if (sign)
 365                         fmt |= 0x04;
 366
 367                 fmt |= (MIXER_ADDR_TVTUNER == dev->dmasound.input) ? 0xc0 : 0x80;
 368                 saa_writeb(SAA7134_NUM_SAMPLES0, ((dev->dmasound.blksize - 1) & 0x0000ff));
 369                 saa_writeb(SAA7134_NUM_SAMPLES1, ((dev->dmasound.blksize - 1) & 0x00ff00) >>  8);
 370                 saa_writeb(SAA7134_NUM_SAMPLES2, ((dev->dmasound.blksize - 1) & 0xff0000) >> 16);
 371                 saa_writeb(SAA7134_AUDIO_FORMAT_CTRL, fmt);
 372
 373                 break;
 374           case PCI_DEVICE_ID_PHILIPS_SAA7133:
 375           case PCI_DEVICE_ID_PHILIPS_SAA7135:
 376                 if (1 == runtime->channels)
 377                         fmt |= (1 << 4);
 378                 if (2 == runtime->channels)
 379                         fmt |= (2 << 4);
 380                 if (!sign)
 381                         fmt |= 0x04;
 382                 saa_writel(SAA7133_NUM_SAMPLES, dev->dmasound.blksize -1);
 383                 saa_writel(SAA7133_AUDIO_CHANNEL, 0x543210 | (fmt << 24));
 384                 break;
 385         }
 386
 387         dprintk("rec_start: afmt=%d ch=%d  =>  fmt=0x%x swap=%c\n",
 388                 runtime->format, runtime->channels, fmt,
 389                 bswap ? 'b' : '-');
 390         /* dma: setup channel 6 (= AUDIO) */
 391         control = SAA7134_RS_CONTROL_BURST_16 |
 392                 SAA7134_RS_CONTROL_ME |
 393                 (dev->dmasound.pt.dma >> 12);
 394         if (bswap)
 395                 control |= SAA7134_RS_CONTROL_BSWAP;
 396
 397         saa_writel(SAA7134_RS_BA1(6),0);
 398         saa_writel(SAA7134_RS_BA2(6),dev->dmasound.blksize);
 399         saa_writel(SAA7134_RS_PITCH(6),0);
 400         saa_writel(SAA7134_RS_CONTROL(6),control);
 401
 402         dev->dmasound.rate = runtime->rate;
 403
 404         return 0;
 405
 406 }
 407
 408 /*
 409  * ALSA pointer fetching
 410  *
 411  *   - One of the ALSA capture callbacks.
 412  *
 413  *   Called whenever a period elapses, it must return the current hardware
 414  *  position of the buffer.
 415  *   Also resets the read counter used to prevent overruns
 416  *
 417  */
 418
 419 static snd_pcm_uframes_t
 420 snd_card_saa7134_capture_pointer(struct snd_pcm_substream * substream)
 421 {
 422         struct snd_pcm_runtime *runtime = substream->runtime;
 423         snd_card_saa7134_pcm_t *pcm = runtime->private_data;
 424         struct saa7134_dev *dev=pcm->dev;
 425
 426         if (dev->dmasound.read_count) {
 427                 dev->dmasound.read_count  -= snd_pcm_lib_period_bytes(substream);
 428                 dev->dmasound.read_offset += snd_pcm_lib_period_bytes(substream);
 429                 if (dev->dmasound.read_offset == dev->dmasound.bufsize)
 430                         dev->dmasound.read_offset = 0;
 431         }
 432
 433         return bytes_to_frames(runtime, dev->dmasound.read_offset);
 434 }
 435
 436 /*
 437  * ALSA hardware capabilities definition
 438  */
 439
 440 static struct snd_pcm_hardware snd_card_saa7134_capture =
 441 {
 442         .info =                 (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
 443                                  SNDRV_PCM_INFO_BLOCK_TRANSFER |
 444                                  SNDRV_PCM_INFO_MMAP_VALID),
 445         .formats =              SNDRV_PCM_FMTBIT_S16_LE | \
 446                                 SNDRV_PCM_FMTBIT_S16_BE | \
 447                                 SNDRV_PCM_FMTBIT_S8 | \
 448                                 SNDRV_PCM_FMTBIT_U8 | \
 449                                 SNDRV_PCM_FMTBIT_U16_LE | \
 450                                 SNDRV_PCM_FMTBIT_U16_BE,
 451         .rates =                SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_48000,
 452         .rate_min =             32000,
 453         .rate_max =             48000,
 454         .channels_min =         1,
 455         .channels_max =         2,
 456         .buffer_bytes_max =     (256*1024),
 457         .period_bytes_min =     64,
 458         .period_bytes_max =     (256*1024),
 459         .periods_min =          4,
 460         .periods_max =          1024,
 461 };
 462
 463 static void snd_card_saa7134_runtime_free(struct snd_pcm_runtime *runtime)
 464 {
 465         snd_card_saa7134_pcm_t *pcm = runtime->private_data;
 466
 467         kfree(pcm);
 468 }
 469
 470
 471 /*
 472  * ALSA hardware params
 473  *
 474  *   - One of the ALSA capture callbacks.
 475  *
 476  *   Called on initialization, right before the PCM preparation
 477  *
 478  */
 479
 480 static int snd_card_saa7134_hw_params(struct snd_pcm_substream * substream,
 481                                       struct snd_pcm_hw_params * hw_params)
 482 {
 483         snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
 484         struct saa7134_dev *dev;
 485         unsigned int period_size, periods;
 486         int err;
 487
 488         period_size = params_period_bytes(hw_params);
 489         periods = params_periods(hw_params);
 490
 491         snd_assert(period_size >= 0x100 && period_size <= 0x10000,
 492                    return -EINVAL);
 493         snd_assert(periods >= 4, return -EINVAL);
 494         snd_assert(period_size * periods <= 1024 * 1024, return -EINVAL);
 495
 496         dev = saa7134->dev;
 497
 498         if (dev->dmasound.blocks == periods &&
 499             dev->dmasound.blksize == period_size)
 500                 return 0;
 501
 502         /* release the old buffer */
 503         if (substream->runtime->dma_area) {
 504                 saa7134_pgtable_free(dev->pci, &dev->dmasound.pt);
 505                 videobuf_sg_dma_unmap(&dev->pci->dev, &dev->dmasound.dma);
 506                 dsp_buffer_free(dev);
 507                 substream->runtime->dma_area = NULL;
 508         }
 509         dev->dmasound.blocks  = periods;
 510         dev->dmasound.blksize = period_size;
 511         dev->dmasound.bufsize = period_size * periods;
 512
 513         err = dsp_buffer_init(dev);
 514         if (0 != err) {
 515                 dev->dmasound.blocks  = 0;
 516                 dev->dmasound.blksize = 0;
 517                 dev->dmasound.bufsize = 0;
 518                 return err;
 519         }
 520
 521         if (0 != (err = videobuf_sg_dma_map(&dev->pci->dev, &dev->dmasound.dma))) {
 522                 dsp_buffer_free(dev);
 523                 return err;
 524         }
 525         if (0 != (err = saa7134_pgtable_alloc(dev->pci,&dev->dmasound.pt))) {
 526                 videobuf_sg_dma_unmap(&dev->pci->dev, &dev->dmasound.dma);
 527                 dsp_buffer_free(dev);
 528                 return err;
 529         }
 530         if (0 != (err = saa7134_pgtable_build(dev->pci,&dev->dmasound.pt,
 531                                                 dev->dmasound.dma.sglist,
 532                                                 dev->dmasound.dma.sglen,
 533                                                 0))) {
 534                 saa7134_pgtable_free(dev->pci, &dev->dmasound.pt);
 535                 videobuf_sg_dma_unmap(&dev->pci->dev, &dev->dmasound.dma);
 536                 dsp_buffer_free(dev);
 537                 return err;
 538         }
 539
 540         /* I should be able to use runtime->dma_addr in the control
 541            byte, but it doesn't work. So I allocate the DMA using the
 542            V4L functions, and force ALSA to use that as the DMA area */
 543
 544         substream->runtime->dma_area = dev->dmasound.dma.vmalloc;
 545         substream->runtime->dma_bytes = dev->dmasound.bufsize;
 546         substream->runtime->dma_addr = 0;
 547
 548         return 0;
 549
 550 }
 551
 552 /*
 553  * ALSA hardware release
 554  *
 555  *   - One of the ALSA capture callbacks.
 556  *
 557  *   Called after closing the device, but before snd_card_saa7134_capture_close
 558  *   It stops the DMA audio and releases the buffers.
 559  *
 560  */
 561
 562 static int snd_card_saa7134_hw_free(struct snd_pcm_substream * substream)
 563 {
 564         snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
 565         struct saa7134_dev *dev;
 566
 567         dev = saa7134->dev;
 568
 569         if (substream->runtime->dma_area) {
 570                 saa7134_pgtable_free(dev->pci, &dev->dmasound.pt);
 571                 videobuf_sg_dma_unmap(&dev->pci->dev, &dev->dmasound.dma);
 572                 dsp_buffer_free(dev);
 573                 substream->runtime->dma_area = NULL;
 574         }
 575
 576         return 0;
 577 }
 578
 579 /*
 580  * ALSA capture finish
 581  *
 582  *   - One of the ALSA capture callbacks.
 583  *
 584  *   Called after closing the device.
 585  *
 586  */
 587
 588 static int snd_card_saa7134_capture_close(struct snd_pcm_substream * substream)
 589 {
 590         snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
 591         struct saa7134_dev *dev = saa7134->dev;
 592
 593         if (saa7134->mute_was_on) {
 594                 dev->ctl_mute = 1;
 595                 saa7134_tvaudio_setmute(dev);
 596         }
 597         return 0;
 598 }
 599
 600 /*
 601  * ALSA capture start
 602  *
 603  *   - One of the ALSA capture callbacks.
 604  *
 605  *   Called when opening the device. It creates and populates the PCM
 606  *  structure
 607  *
 608  */
 609
 610 static int snd_card_saa7134_capture_open(struct snd_pcm_substream * substream)
 611 {
 612         struct snd_pcm_runtime *runtime = substream->runtime;
 613         snd_card_saa7134_pcm_t *pcm;
 614         snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
 615         struct saa7134_dev *dev;
 616         int amux, err;
 617
 618         if (!saa7134) {
 619                 printk(KERN_ERR "BUG: saa7134 can't find device struct."
 620                                 " Can't proceed with open\n");
 621                 return -ENODEV;
 622         }
 623         dev = saa7134->dev;
 624         mutex_lock(&dev->dmasound.lock);
 625
 626         dev->dmasound.read_count  = 0;
 627         dev->dmasound.read_offset = 0;
 628
 629         amux = dev->input->amux;
 630         if ((amux < 1) || (amux > 3))
 631                 amux = 1;
 632         dev->dmasound.input  =  amux - 1;
 633
 634         mutex_unlock(&dev->dmasound.lock);
 635
 636         pcm = kzalloc(sizeof(*pcm), GFP_KERNEL);
 637         if (pcm == NULL)
 638                 return -ENOMEM;
 639
 640         pcm->dev=saa7134->dev;
 641
 642         spin_lock_init(&pcm->lock);
 643
 644         pcm->substream = substream;
 645         runtime->private_data = pcm;
 646         runtime->private_free = snd_card_saa7134_runtime_free;
 647         runtime->hw = snd_card_saa7134_capture;
 648
 649         if (dev->ctl_mute != 0) {
 650                 saa7134->mute_was_on = 1;
 651                 dev->ctl_mute = 0;
 652                 saa7134_tvaudio_setmute(dev);
 653         }
 654
 655         err = snd_pcm_hw_constraint_integer(runtime,
 656                                                 SNDRV_PCM_HW_PARAM_PERIODS);
 657         if (err < 0)
 658                 return err;
 659
 660         err = snd_pcm_hw_constraint_step(runtime, 0,
 661                                                 SNDRV_PCM_HW_PARAM_PERIODS, 2);
 662         if (err < 0)
 663                 return err;
 664
 665         return 0;
 666 }
 667
 668 /*
 669  * page callback (needed for mmap)
 670  */
 671
 672 static struct page *snd_card_saa7134_page(struct snd_pcm_substream *substream,
 673                                         unsigned long offset)
 674 {
 675         void *pageptr = substream->runtime->dma_area + offset;
 676         return vmalloc_to_page(pageptr);
 677 }
 678
 679 /*
 680  * ALSA capture callbacks definition
 681  */
 682
 683 static struct snd_pcm_ops snd_card_saa7134_capture_ops = {
 684         .open =                 snd_card_saa7134_capture_open,
 685         .close =                snd_card_saa7134_capture_close,
 686         .ioctl =                snd_pcm_lib_ioctl,
 687         .hw_params =            snd_card_saa7134_hw_params,
 688         .hw_free =              snd_card_saa7134_hw_free,
 689         .prepare =              snd_card_saa7134_capture_prepare,
 690         .trigger =              snd_card_saa7134_capture_trigger,
 691         .pointer =              snd_card_saa7134_capture_pointer,
 692         .page =                 snd_card_saa7134_page,
 693 };
 694
 695 /*
 696  * ALSA PCM setup
 697  *
 698  *   Called when initializing the board. Sets up the name and hooks up
 699  *  the callbacks
 700  *
 701  */
 702
 703 static int snd_card_saa7134_pcm(snd_card_saa7134_t *saa7134, int device)
 704 {
 705         struct snd_pcm *pcm;
 706         int err;
 707
 708         if ((err = snd_pcm_new(saa7134->card, "SAA7134 PCM", device, 0, 1, &pcm)) < 0)
 709                 return err;
 710         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_card_saa7134_capture_ops);
 711         pcm->private_data = saa7134;
 712         pcm->info_flags = 0;
 713         strcpy(pcm->name, "SAA7134 PCM");
 714         return 0;
 715 }
 716
 717 #define SAA713x_VOLUME(xname, xindex, addr) \
 718 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
 719   .info = snd_saa7134_volume_info, \
 720   .get = snd_saa7134_volume_get, .put = snd_saa7134_volume_put, \
 721   .private_value = addr }
 722
 723 static int snd_saa7134_volume_info(struct snd_kcontrol * kcontrol,
 724                                    struct snd_ctl_elem_info * uinfo)
 725 {
 726         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 727         uinfo->count = 2;
 728         uinfo->value.integer.min = 0;
 729         uinfo->value.integer.max = 20;
 730         return 0;
 731 }
 732
 733 static int snd_saa7134_volume_get(struct snd_kcontrol * kcontrol,
 734                                   struct snd_ctl_elem_value * ucontrol)
 735 {
 736         snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol);
 737         int addr = kcontrol->private_value;
 738
 739         ucontrol->value.integer.value[0] = chip->mixer_volume[addr][0];
 740         ucontrol->value.integer.value[1] = chip->mixer_volume[addr][1];
 741         return 0;
 742 }
 743
 744 static int snd_saa7134_volume_put(struct snd_kcontrol * kcontrol,
 745                                   struct snd_ctl_elem_value * ucontrol)
 746 {
 747         snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol);
 748         struct saa7134_dev *dev = chip->dev;
 749
 750         int change, addr = kcontrol->private_value;
 751         int left, right;
 752
 753         left = ucontrol->value.integer.value[0];
 754         if (left < 0)
 755                 left = 0;
 756         if (left > 20)
 757                 left = 20;
 758         right = ucontrol->value.integer.value[1];
 759         if (right < 0)
 760                 right = 0;
 761         if (right > 20)
 762                 right = 20;
 763         spin_lock_irq(&chip->mixer_lock);
 764         change = 0;
 765         if (chip->mixer_volume[addr][0] != left) {
 766                 change = 1;
 767                 right = left;
 768         }
 769         if (chip->mixer_volume[addr][1] != right) {
 770                 change = 1;
 771                 left = right;
 772         }
 773         if (change) {
 774                 switch (dev->pci->device) {
 775                         case PCI_DEVICE_ID_PHILIPS_SAA7134:
 776                                 switch (addr) {
 777                                         case MIXER_ADDR_TVTUNER:
 778                                                 left = 20;
 779                                                 break;
 780                                         case MIXER_ADDR_LINE1:
 781                                                 saa_andorb(SAA7134_ANALOG_IO_SELECT,  0x10,
 782                                                            (left > 10) ? 0x00 : 0x10);
 783                                                 break;
 784                                         case MIXER_ADDR_LINE2:
 785                                                 saa_andorb(SAA7134_ANALOG_IO_SELECT,  0x20,
 786                                                            (left > 10) ? 0x00 : 0x20);
 787                                                 break;
 788                                 }
 789                                 break;
 790                         case PCI_DEVICE_ID_PHILIPS_SAA7133:
 791                         case PCI_DEVICE_ID_PHILIPS_SAA7135:
 792                                 switch (addr) {
 793                                         case MIXER_ADDR_TVTUNER:
 794                                                 left = 20;
 795                                                 break;
 796                                         case MIXER_ADDR_LINE1:
 797                                                 saa_andorb(0x0594,  0x10,
 798                                                            (left > 10) ? 0x00 : 0x10);
 799                                                 break;
 800                                         case MIXER_ADDR_LINE2:
 801                                                 saa_andorb(0x0594,  0x20,
 802                                                            (left > 10) ? 0x00 : 0x20);
 803                                                 break;
 804                                 }
 805                                 break;
 806                 }
 807                 chip->mixer_volume[addr][0] = left;
 808                 chip->mixer_volume[addr][1] = right;
 809         }
 810         spin_unlock_irq(&chip->mixer_lock);
 811         return change;
 812 }
 813
 814 #define SAA713x_CAPSRC(xname, xindex, addr) \
 815 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
 816   .info = snd_saa7134_capsrc_info, \
 817   .get = snd_saa7134_capsrc_get, .put = snd_saa7134_capsrc_put, \
 818   .private_value = addr }
 819
 820 static int snd_saa7134_capsrc_info(struct snd_kcontrol * kcontrol,
 821                                    struct snd_ctl_elem_info * uinfo)
 822 {
 823         uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
 824         uinfo->count = 2;
 825         uinfo->value.integer.min = 0;
 826         uinfo->value.integer.max = 1;
 827         return 0;
 828 }
 829
 830 static int snd_saa7134_capsrc_get(struct snd_kcontrol * kcontrol,
 831                                   struct snd_ctl_elem_value * ucontrol)
 832 {
 833         snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol);
 834         int addr = kcontrol->private_value;
 835
 836         spin_lock_irq(&chip->mixer_lock);
 837         ucontrol->value.integer.value[0] = chip->capture_source[addr][0];
 838         ucontrol->value.integer.value[1] = chip->capture_source[addr][1];
 839         spin_unlock_irq(&chip->mixer_lock);
 840
 841         return 0;
 842 }
 843
 844 static int snd_saa7134_capsrc_put(struct snd_kcontrol * kcontrol,
 845                                   struct snd_ctl_elem_value * ucontrol)
 846 {
 847         snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol);
 848         int change, addr = kcontrol->private_value;
 849         int left, right;
 850         u32 anabar, xbarin;
 851         int analog_io, rate;
 852         struct saa7134_dev *dev;
 853
 854         dev = chip->dev;
 855
 856         left = ucontrol->value.integer.value[0] & 1;
 857         right = ucontrol->value.integer.value[1] & 1;
 858         spin_lock_irq(&chip->mixer_lock);
 859
 860         change = chip->capture_source[addr][0] != left ||
 861                  chip->capture_source[addr][1] != right;
 862         chip->capture_source[addr][0] = left;
 863         chip->capture_source[addr][1] = right;
 864         dev->dmasound.input=addr;
 865         spin_unlock_irq(&chip->mixer_lock);
 866
 867
 868         if (change) {
 869           switch (dev->pci->device) {
 870
 871            case PCI_DEVICE_ID_PHILIPS_SAA7134:
 872                 switch (addr) {
 873                         case MIXER_ADDR_TVTUNER:
 874                                 saa_andorb(SAA7134_AUDIO_FORMAT_CTRL, 0xc0, 0xc0);
 875                                 saa_andorb(SAA7134_SIF_SAMPLE_FREQ,   0x03, 0x00);
 876                                 break;
 877                         case MIXER_ADDR_LINE1:
 878                         case MIXER_ADDR_LINE2:
 879                                 analog_io = (MIXER_ADDR_LINE1 == addr) ? 0x00 : 0x08;
 880                                 rate = (32000 == dev->dmasound.rate) ? 0x01 : 0x03;
 881                                 saa_andorb(SAA7134_ANALOG_IO_SELECT,  0x08, analog_io);
 882                                 saa_andorb(SAA7134_AUDIO_FORMAT_CTRL, 0xc0, 0x80);
 883                                 saa_andorb(SAA7134_SIF_SAMPLE_FREQ,   0x03, rate);
 884                                 break;
 885                 }
 886
 887                 break;
 888            case PCI_DEVICE_ID_PHILIPS_SAA7133:
 889            case PCI_DEVICE_ID_PHILIPS_SAA7135:
 890                 xbarin = 0x03; // adc
 891                 anabar = 0;
 892                 switch (addr) {
 893                         case MIXER_ADDR_TVTUNER:
 894                                 xbarin = 0; // Demodulator
 895                                 anabar = 2; // DACs
 896                                 break;
 897                         case MIXER_ADDR_LINE1:
 898                                 anabar = 0;  // aux1, aux1
 899                                 break;
 900                         case MIXER_ADDR_LINE2:
 901                                 anabar = 9;  // aux2, aux2
 902                                 break;
 903                 }
 904
 905                 /* output xbar always main channel */
 906                 saa_dsp_writel(dev, SAA7133_DIGITAL_OUTPUT_SEL1, 0xbbbb10);
 907
 908                 if (left || right) { // We've got data, turn the input on
 909                   saa_dsp_writel(dev, SAA7133_DIGITAL_INPUT_XBAR1, xbarin);
 910                   saa_writel(SAA7133_ANALOG_IO_SELECT, anabar);
 911                 } else {
 912                   saa_dsp_writel(dev, SAA7133_DIGITAL_INPUT_XBAR1, 0);
 913                   saa_writel(SAA7133_ANALOG_IO_SELECT, 0);
 914                 }
 915                 break;
 916           }
 917         }
 918
 919         return change;
 920 }
 921
 922 static struct snd_kcontrol_new snd_saa7134_controls[] = {
 923 SAA713x_VOLUME("Video Volume", 0, MIXER_ADDR_TVTUNER),
 924 SAA713x_CAPSRC("Video Capture Switch", 0, MIXER_ADDR_TVTUNER),
 925 SAA713x_VOLUME("Line Volume", 1, MIXER_ADDR_LINE1),
 926 SAA713x_CAPSRC("Line Capture Switch", 1, MIXER_ADDR_LINE1),
 927 SAA713x_VOLUME("Line Volume", 2, MIXER_ADDR_LINE2),
 928 SAA713x_CAPSRC("Line Capture Switch", 2, MIXER_ADDR_LINE2),
 929 };
 930
 931 /*
 932  * ALSA mixer setup
 933  *
 934  *   Called when initializing the board. Sets up the name and hooks up
 935  *  the callbacks
 936  *
 937  */
 938
 939 static int snd_card_saa7134_new_mixer(snd_card_saa7134_t * chip)
 940 {
 941         struct snd_card *card = chip->card;
 942         unsigned int idx;
 943         int err;
 944
 945         snd_assert(chip != NULL, return -EINVAL);
 946         strcpy(card->mixername, "SAA7134 Mixer");
 947
 948         for (idx = 0; idx < ARRAY_SIZE(snd_saa7134_controls); idx++) {
 949                 if ((err = snd_ctl_add(card, snd_ctl_new1(&snd_saa7134_controls[idx], chip))) < 0)
 950                         return err;
 951         }
 952         return 0;
 953 }
 954
 955 static void snd_saa7134_free(struct snd_card * card)
 956 {
 957         snd_card_saa7134_t *chip = card->private_data;
 958
 959         if (chip->dev->dmasound.priv_data == NULL)
 960                 return;
 961
 962         if (chip->irq >= 0)
 963                 free_irq(chip->irq, &chip->dev->dmasound);
 964
 965         chip->dev->dmasound.priv_data = NULL;
 966
 967 }
 968
 969 /*
 970  * ALSA initialization
 971  *
 972  *   Called by the init routine, once for each saa7134 device present,
 973  *  it creates the basic structures and registers the ALSA devices
 974  *
 975  */
 976
 977 static int alsa_card_saa7134_create(struct saa7134_dev *dev, int devnum)
 978 {
 979
 980         struct snd_card *card;
 981         snd_card_saa7134_t *chip;
 982         int err;
 983
 984
 985         if (devnum >= SNDRV_CARDS)
 986                 return -ENODEV;
 987         if (!enable[devnum])
 988                 return -ENODEV;
 989
 990         card = snd_card_new(index[devnum], id[devnum], THIS_MODULE, sizeof(snd_card_saa7134_t));
 991
 992         if (card == NULL)
 993                 return -ENOMEM;
 994
 995         strcpy(card->driver, "SAA7134");
 996
 997         /* Card "creation" */
 998
 999         card->private_free = snd_saa7134_free;
1000         chip = (snd_card_saa7134_t *) card->private_data;
1001
1002         spin_lock_init(&chip->lock);
1003         spin_lock_init(&chip->mixer_lock);
1004
1005         chip->dev = dev;
1006
1007         chip->card = card;
1008
1009         chip->pci = dev->pci;
1010         chip->iobase = pci_resource_start(dev->pci, 0);
1011
1012
1013         err = request_irq(dev->pci->irq, saa7134_alsa_irq,
1014                                 IRQF_SHARED | IRQF_DISABLED, dev->name,
1015                                 (void*) &dev->dmasound);
1016
1017         if (err < 0) {
1018                 printk(KERN_ERR "%s: can't get IRQ %d for ALSA\n",
1019                         dev->name, dev->pci->irq);
1020                 goto __nodev;
1021         }
1022
1023         chip->irq = dev->pci->irq;
1024
1025         mutex_init(&dev->dmasound.lock);
1026
1027         if ((err = snd_card_saa7134_new_mixer(chip)) < 0)
1028                 goto __nodev;
1029
1030         if ((err = snd_card_saa7134_pcm(chip, 0)) < 0)
1031                 goto __nodev;
1032
1033         snd_card_set_dev(card, &chip->pci->dev);
1034
1035         /* End of "creation" */
1036
1037         strcpy(card->shortname, "SAA7134");
1038         sprintf(card->longname, "%s at 0x%lx irq %d",
1039                 chip->dev->name, chip->iobase, chip->irq);
1040
1041         printk(KERN_INFO "%s/alsa: %s registered as card %d\n",dev->name,card->longname,index[devnum]);
1042
1043         if ((err = snd_card_register(card)) == 0) {
1044                 snd_saa7134_cards[devnum] = card;
1045                 return 0;
1046         }
1047
1048 __nodev:
1049         snd_card_free(card);
1050         return err;
1051 }
1052
1053
1054 static int alsa_device_init(struct saa7134_dev *dev)
1055 {
1056         dev->dmasound.priv_data = dev;
1057         alsa_card_saa7134_create(dev,dev->nr);
1058         return 1;
1059 }
1060
1061 static int alsa_device_exit(struct saa7134_dev *dev)
1062 {
1063
1064         snd_card_free(snd_saa7134_cards[dev->nr]);
1065         snd_saa7134_cards[dev->nr] = NULL;
1066         return 1;
1067 }
1068
1069 /*
1070  * Module initializer
1071  *
1072  * Loops through present saa7134 cards, and assigns an ALSA device
1073  * to each one
1074  *
1075  */
1076
1077 static int saa7134_alsa_init(void)
1078 {
1079         struct saa7134_dev *dev = NULL;
1080         struct list_head *list;
1081
1082         saa7134_dmasound_init = alsa_device_init;
1083         saa7134_dmasound_exit = alsa_device_exit;
1084
1085         printk(KERN_INFO "saa7134 ALSA driver for DMA sound loaded\n");
1086
1087         list_for_each(list,&saa7134_devlist) {
1088                 dev = list_entry(list, struct saa7134_dev, devlist);
1089                 alsa_device_init(dev);
1090         }
1091
1092         if (dev == NULL)
1093                 printk(KERN_INFO "saa7134 ALSA: no saa7134 cards found\n");
1094
1095         return 0;
1096
1097 }
1098
1099 /*
1100  * Module destructor
1101  */
1102
1103 static void saa7134_alsa_exit(void)
1104 {
1105         int idx;
1106
1107         for (idx = 0; idx < SNDRV_CARDS; idx++) {
1108                 snd_card_free(snd_saa7134_cards[idx]);
1109         }
1110
1111         saa7134_dmasound_init = NULL;
1112         saa7134_dmasound_exit = NULL;
1113         printk(KERN_INFO "saa7134 ALSA driver for DMA sound unloaded\n");
1114
1115         return;
1116 }
1117
1118 /* We initialize this late, to make sure the sound system is up and running */
1119 late_initcall(saa7134_alsa_init);
1120 module_exit(saa7134_alsa_exit);
1121 MODULE_LICENSE("GPL");
1122 MODULE_AUTHOR("Ricardo Cerqueira");