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  = 0;
  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 /*
  85  * PCM structure
  86  */
  87
  88 typedef struct snd_card_saa7134_pcm {
  89         struct saa7134_dev *dev;
  90
  91         spinlock_t lock;
  92
  93         struct snd_pcm_substream *substream;
  94 } snd_card_saa7134_pcm_t;
  95
  96 static struct snd_card *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 static void saa7134_irq_alsa_done(struct saa7134_dev *dev,
 143                                   unsigned long status)
 144 {
 145         int next_blk, reg = 0;
 146
 147         spin_lock(&dev->slock);
 148         if (UNSET == dev->dmasound.dma_blk) {
 149                 dprintk("irq: recording stopped\n");
 150                 goto done;
 151         }
 152         if (0 != (status & 0x0f000000))
 153                 dprintk("irq: lost %ld\n", (status >> 24) & 0x0f);
 154         if (0 == (status & 0x10000000)) {
 155                 /* odd */
 156                 if (0 == (dev->dmasound.dma_blk & 0x01))
 157                         reg = SAA7134_RS_BA1(6);
 158         } else {
 159                 /* even */
 160                 if (1 == (dev->dmasound.dma_blk & 0x01))
 161                         reg = SAA7134_RS_BA2(6);
 162         }
 163         if (0 == reg) {
 164                 dprintk("irq: field oops [%s]\n",
 165                         (status & 0x10000000) ? "even" : "odd");
 166                 goto done;
 167         }
 168
 169         if (dev->dmasound.read_count >= dev->dmasound.blksize * (dev->dmasound.blocks-2)) {
 170                 dprintk("irq: overrun [full=%d/%d] - Blocks in %d\n",dev->dmasound.read_count,
 171                         dev->dmasound.bufsize, dev->dmasound.blocks);
 172                 spin_unlock(&dev->slock);
 173                 snd_pcm_stop(dev->dmasound.substream,SNDRV_PCM_STATE_XRUN);
 174                 return;
 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
 197  done:
 198         spin_unlock(&dev->slock);
 199
 200 }
 201
 202 /*
 203  * IRQ request handler
 204  *
 205  *   Runs along with saa7134's IRQ handler, discards anything that isn't
 206  *   DMA sound
 207  *
 208  */
 209
 210 static irqreturn_t saa7134_alsa_irq(int irq, void *dev_id)
 211 {
 212         struct saa7134_dmasound *dmasound = dev_id;
 213         struct saa7134_dev *dev = dmasound->priv_data;
 214
 215         unsigned long report, status;
 216         int loop, handled = 0;
 217
 218         for (loop = 0; loop < 10; loop++) {
 219                 report = saa_readl(SAA7134_IRQ_REPORT);
 220                 status = saa_readl(SAA7134_IRQ_STATUS);
 221
 222                 if (report & SAA7134_IRQ_REPORT_DONE_RA3) {
 223                         handled = 1;
 224                         saa_writel(SAA7134_IRQ_REPORT,
 225                                    SAA7134_IRQ_REPORT_DONE_RA3);
 226                         saa7134_irq_alsa_done(dev, status);
 227                 } else {
 228                         goto out;
 229                 }
 230         }
 231
 232         if (loop == 10) {
 233                 dprintk("error! looping IRQ!");
 234         }
 235
 236 out:
 237         return IRQ_RETVAL(handled);
 238 }
 239
 240 /*
 241  * ALSA capture trigger
 242  *
 243  *   - One of the ALSA capture callbacks.
 244  *
 245  *   Called whenever a capture is started or stopped. Must be defined,
 246  *   but there's nothing we want to do here
 247  *
 248  */
 249
 250 static int snd_card_saa7134_capture_trigger(struct snd_pcm_substream * substream,
 251                                           int cmd)
 252 {
 253         struct snd_pcm_runtime *runtime = substream->runtime;
 254         snd_card_saa7134_pcm_t *pcm = runtime->private_data;
 255         struct saa7134_dev *dev=pcm->dev;
 256         int err = 0;
 257
 258         spin_lock(&dev->slock);
 259         if (cmd == SNDRV_PCM_TRIGGER_START) {
 260                 /* start dma */
 261                 saa7134_dma_start(dev);
 262         } else if (cmd == SNDRV_PCM_TRIGGER_STOP) {
 263                 /* stop dma */
 264                 saa7134_dma_stop(dev);
 265         } else {
 266                 err = -EINVAL;
 267         }
 268         spin_unlock(&dev->slock);
 269
 270         return err;
 271 }
 272
 273 /*
 274  * DMA buffer initialization
 275  *
 276  *   Uses V4L functions to initialize the DMA. Shouldn't be necessary in
 277  *  ALSA, but I was unable to use ALSA's own DMA, and had to force the
 278  *  usage of V4L's
 279  *
 280  *   - Copied verbatim from saa7134-oss.
 281  *
 282  */
 283
 284 static int dsp_buffer_init(struct saa7134_dev *dev)
 285 {
 286         int err;
 287
 288         BUG_ON(!dev->dmasound.bufsize);
 289
 290         videobuf_dma_init(&dev->dmasound.dma);
 291         err = videobuf_dma_init_kernel(&dev->dmasound.dma, PCI_DMA_FROMDEVICE,
 292                                        (dev->dmasound.bufsize + PAGE_SIZE) >> PAGE_SHIFT);
 293         if (0 != err)
 294                 return err;
 295         return 0;
 296 }
 297
 298 /*
 299  * DMA buffer release
 300  *
 301  *   Called after closing the device, during snd_card_saa7134_capture_close
 302  *
 303  */
 304
 305 static int dsp_buffer_free(struct saa7134_dev *dev)
 306 {
 307         BUG_ON(!dev->dmasound.blksize);
 308
 309         videobuf_dma_free(&dev->dmasound.dma);
 310
 311         dev->dmasound.blocks  = 0;
 312         dev->dmasound.blksize = 0;
 313         dev->dmasound.bufsize = 0;
 314
 315         return 0;
 316 }
 317
 318
 319 /*
 320  * ALSA PCM preparation
 321  *
 322  *   - One of the ALSA capture callbacks.
 323  *
 324  *   Called right after the capture device is opened, this function configures
 325  *  the buffer using the previously defined functions, allocates the memory,
 326  *  sets up the hardware registers, and then starts the DMA. When this function
 327  *  returns, the audio should be flowing.
 328  *
 329  */
 330
 331 static int snd_card_saa7134_capture_prepare(struct snd_pcm_substream * substream)
 332 {
 333         struct snd_pcm_runtime *runtime = substream->runtime;
 334         int bswap, sign;
 335         u32 fmt, control;
 336         snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
 337         struct saa7134_dev *dev;
 338         snd_card_saa7134_pcm_t *pcm = runtime->private_data;
 339
 340         pcm->dev->dmasound.substream = substream;
 341
 342         dev = saa7134->dev;
 343
 344         if (snd_pcm_format_width(runtime->format) == 8)
 345                 fmt = 0x00;
 346         else
 347                 fmt = 0x01;
 348
 349         if (snd_pcm_format_signed(runtime->format))
 350                 sign = 1;
 351         else
 352                 sign = 0;
 353
 354         if (snd_pcm_format_big_endian(runtime->format))
 355                 bswap = 1;
 356         else
 357                 bswap = 0;
 358
 359         switch (dev->pci->device) {
 360           case PCI_DEVICE_ID_PHILIPS_SAA7134:
 361                 if (1 == runtime->channels)
 362                         fmt |= (1 << 3);
 363                 if (2 == runtime->channels)
 364                         fmt |= (3 << 3);
 365                 if (sign)
 366                         fmt |= 0x04;
 367
 368                 fmt |= (MIXER_ADDR_TVTUNER == dev->dmasound.input) ? 0xc0 : 0x80;
 369                 saa_writeb(SAA7134_NUM_SAMPLES0, ((dev->dmasound.blksize - 1) & 0x0000ff));
 370                 saa_writeb(SAA7134_NUM_SAMPLES1, ((dev->dmasound.blksize - 1) & 0x00ff00) >>  8);
 371                 saa_writeb(SAA7134_NUM_SAMPLES2, ((dev->dmasound.blksize - 1) & 0xff0000) >> 16);
 372                 saa_writeb(SAA7134_AUDIO_FORMAT_CTRL, fmt);
 373
 374                 break;
 375           case PCI_DEVICE_ID_PHILIPS_SAA7133:
 376           case PCI_DEVICE_ID_PHILIPS_SAA7135:
 377                 if (1 == runtime->channels)
 378                         fmt |= (1 << 4);
 379                 if (2 == runtime->channels)
 380                         fmt |= (2 << 4);
 381                 if (!sign)
 382                         fmt |= 0x04;
 383                 saa_writel(SAA7133_NUM_SAMPLES, dev->dmasound.blksize -1);
 384                 saa_writel(SAA7133_AUDIO_CHANNEL, 0x543210 | (fmt << 24));
 385                 break;
 386         }
 387
 388         dprintk("rec_start: afmt=%d ch=%d  =>  fmt=0x%x swap=%c\n",
 389                 runtime->format, runtime->channels, fmt,
 390                 bswap ? 'b' : '-');
 391         /* dma: setup channel 6 (= AUDIO) */
 392         control = SAA7134_RS_CONTROL_BURST_16 |
 393                 SAA7134_RS_CONTROL_ME |
 394                 (dev->dmasound.pt.dma >> 12);
 395         if (bswap)
 396                 control |= SAA7134_RS_CONTROL_BSWAP;
 397
 398         saa_writel(SAA7134_RS_BA1(6),0);
 399         saa_writel(SAA7134_RS_BA2(6),dev->dmasound.blksize);
 400         saa_writel(SAA7134_RS_PITCH(6),0);
 401         saa_writel(SAA7134_RS_CONTROL(6),control);
 402
 403         dev->dmasound.rate = runtime->rate;
 404
 405         return 0;
 406
 407 }
 408
 409 /*
 410  * ALSA pointer fetching
 411  *
 412  *   - One of the ALSA capture callbacks.
 413  *
 414  *   Called whenever a period elapses, it must return the current hardware
 415  *  position of the buffer.
 416  *   Also resets the read counter used to prevent overruns
 417  *
 418  */
 419
 420 static snd_pcm_uframes_t
 421 snd_card_saa7134_capture_pointer(struct snd_pcm_substream * substream)
 422 {
 423         struct snd_pcm_runtime *runtime = substream->runtime;
 424         snd_card_saa7134_pcm_t *pcm = runtime->private_data;
 425         struct saa7134_dev *dev=pcm->dev;
 426
 427         if (dev->dmasound.read_count) {
 428                 dev->dmasound.read_count  -= snd_pcm_lib_period_bytes(substream);
 429                 dev->dmasound.read_offset += snd_pcm_lib_period_bytes(substream);
 430                 if (dev->dmasound.read_offset == dev->dmasound.bufsize)
 431                         dev->dmasound.read_offset = 0;
 432         }
 433
 434         return bytes_to_frames(runtime, dev->dmasound.read_offset);
 435 }
 436
 437 /*
 438  * ALSA hardware capabilities definition
 439  */
 440
 441 static struct snd_pcm_hardware snd_card_saa7134_capture =
 442 {
 443         .info =                 (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
 444                                  SNDRV_PCM_INFO_BLOCK_TRANSFER |
 445                                  SNDRV_PCM_INFO_MMAP_VALID),
 446         .formats =              SNDRV_PCM_FMTBIT_S16_LE | \
 447                                 SNDRV_PCM_FMTBIT_S16_BE | \
 448                                 SNDRV_PCM_FMTBIT_S8 | \
 449                                 SNDRV_PCM_FMTBIT_U8 | \
 450                                 SNDRV_PCM_FMTBIT_U16_LE | \
 451                                 SNDRV_PCM_FMTBIT_U16_BE,
 452         .rates =                SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_48000,
 453         .rate_min =             32000,
 454         .rate_max =             48000,
 455         .channels_min =         1,
 456         .channels_max =         2,
 457         .buffer_bytes_max =     (256*1024),
 458         .period_bytes_min =     64,
 459         .period_bytes_max =     (256*1024),
 460         .periods_min =          4,
 461         .periods_max =          1024,
 462 };
 463
 464 static void snd_card_saa7134_runtime_free(struct snd_pcm_runtime *runtime)
 465 {
 466         snd_card_saa7134_pcm_t *pcm = runtime->private_data;
 467
 468         kfree(pcm);
 469 }
 470
 471
 472 /*
 473  * ALSA hardware params
 474  *
 475  *   - One of the ALSA capture callbacks.
 476  *
 477  *   Called on initialization, right before the PCM preparation
 478  *
 479  */
 480
 481 static int snd_card_saa7134_hw_params(struct snd_pcm_substream * substream,
 482                                       struct snd_pcm_hw_params * hw_params)
 483 {
 484         snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
 485         struct saa7134_dev *dev;
 486         unsigned int period_size, periods;
 487         int err;
 488
 489         period_size = params_period_bytes(hw_params);
 490         periods = params_periods(hw_params);
 491
 492         snd_assert(period_size >= 0x100 && period_size <= 0x10000,
 493                    return -EINVAL);
 494         snd_assert(periods >= 4, return -EINVAL);
 495         snd_assert(period_size * periods <= 1024 * 1024, return -EINVAL);
 496
 497         dev = saa7134->dev;
 498
 499         if (dev->dmasound.blocks == periods &&
 500             dev->dmasound.blksize == period_size)
 501                 return 0;
 502
 503         /* release the old buffer */
 504         if (substream->runtime->dma_area) {
 505                 saa7134_pgtable_free(dev->pci, &dev->dmasound.pt);
 506                 videobuf_pci_dma_unmap(dev->pci, &dev->dmasound.dma);
 507                 dsp_buffer_free(dev);
 508                 substream->runtime->dma_area = NULL;
 509         }
 510         dev->dmasound.blocks  = periods;
 511         dev->dmasound.blksize = period_size;
 512         dev->dmasound.bufsize = period_size * periods;
 513
 514         err = dsp_buffer_init(dev);
 515         if (0 != err) {
 516                 dev->dmasound.blocks  = 0;
 517                 dev->dmasound.blksize = 0;
 518                 dev->dmasound.bufsize = 0;
 519                 return err;
 520         }
 521
 522         if (0 != (err = videobuf_pci_dma_map(dev->pci, &dev->dmasound.dma))) {
 523                 dsp_buffer_free(dev);
 524                 return err;
 525         }
 526         if (0 != (err = saa7134_pgtable_alloc(dev->pci,&dev->dmasound.pt))) {
 527                 videobuf_pci_dma_unmap(dev->pci, &dev->dmasound.dma);
 528                 dsp_buffer_free(dev);
 529                 return err;
 530         }
 531         if (0 != (err = saa7134_pgtable_build(dev->pci,&dev->dmasound.pt,
 532                                                 dev->dmasound.dma.sglist,
 533                                                 dev->dmasound.dma.sglen,
 534                                                 0))) {
 535                 saa7134_pgtable_free(dev->pci, &dev->dmasound.pt);
 536                 videobuf_pci_dma_unmap(dev->pci, &dev->dmasound.dma);
 537                 dsp_buffer_free(dev);
 538                 return err;
 539         }
 540
 541         /* I should be able to use runtime->dma_addr in the control
 542            byte, but it doesn't work. So I allocate the DMA using the
 543            V4L functions, and force ALSA to use that as the DMA area */
 544
 545         substream->runtime->dma_area = dev->dmasound.dma.vmalloc;
 546         substream->runtime->dma_bytes = dev->dmasound.bufsize;
 547         substream->runtime->dma_addr = 0;
 548
 549         return 0;
 550
 551 }
 552
 553 /*
 554  * ALSA hardware release
 555  *
 556  *   - One of the ALSA capture callbacks.
 557  *
 558  *   Called after closing the device, but before snd_card_saa7134_capture_close
 559  *   It stops the DMA audio and releases the buffers.
 560  *
 561  */
 562
 563 static int snd_card_saa7134_hw_free(struct snd_pcm_substream * substream)
 564 {
 565         snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
 566         struct saa7134_dev *dev;
 567
 568         dev = saa7134->dev;
 569
 570         if (substream->runtime->dma_area) {
 571                 saa7134_pgtable_free(dev->pci, &dev->dmasound.pt);
 572                 videobuf_pci_dma_unmap(dev->pci, &dev->dmasound.dma);
 573                 dsp_buffer_free(dev);
 574                 substream->runtime->dma_area = NULL;
 575         }
 576
 577         return 0;
 578 }
 579
 580 /*
 581  * ALSA capture finish
 582  *
 583  *   - One of the ALSA capture callbacks.
 584  *
 585  *   Called after closing the device.
 586  *
 587  */
 588
 589 static int snd_card_saa7134_capture_close(struct snd_pcm_substream * substream)
 590 {
 591         snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
 592         struct saa7134_dev *dev = saa7134->dev;
 593
 594         if (saa7134->mute_was_on) {
 595                 dev->ctl_mute = 1;
 596                 saa7134_tvaudio_setmute(dev);
 597         }
 598         return 0;
 599 }
 600
 601 /*
 602  * ALSA capture start
 603  *
 604  *   - One of the ALSA capture callbacks.
 605  *
 606  *   Called when opening the device. It creates and populates the PCM
 607  *  structure
 608  *
 609  */
 610
 611 static int snd_card_saa7134_capture_open(struct snd_pcm_substream * substream)
 612 {
 613         struct snd_pcm_runtime *runtime = substream->runtime;
 614         snd_card_saa7134_pcm_t *pcm;
 615         snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
 616         struct saa7134_dev *dev = saa7134->dev;
 617         int amux, err;
 618
 619         mutex_lock(&dev->dmasound.lock);
 620
 621         dev->dmasound.read_count  = 0;
 622         dev->dmasound.read_offset = 0;
 623
 624         amux = dev->input->amux;
 625         if ((amux < 1) || (amux > 3))
 626                 amux = 1;
 627         dev->dmasound.input  =  amux - 1;
 628
 629         mutex_unlock(&dev->dmasound.lock);
 630
 631         pcm = kzalloc(sizeof(*pcm), GFP_KERNEL);
 632         if (pcm == NULL)
 633                 return -ENOMEM;
 634
 635         pcm->dev=saa7134->dev;
 636
 637         spin_lock_init(&pcm->lock);
 638
 639         pcm->substream = substream;
 640         runtime->private_data = pcm;
 641         runtime->private_free = snd_card_saa7134_runtime_free;
 642         runtime->hw = snd_card_saa7134_capture;
 643
 644         if (dev->ctl_mute != 0) {
 645                 saa7134->mute_was_on = 1;
 646                 dev->ctl_mute = 0;
 647                 saa7134_tvaudio_setmute(dev);
 648         }
 649
 650         err = snd_pcm_hw_constraint_integer(runtime,
 651                                                 SNDRV_PCM_HW_PARAM_PERIODS);
 652         if (err < 0)
 653                 return err;
 654
 655         err = snd_pcm_hw_constraint_step(runtime, 0,
 656                                                 SNDRV_PCM_HW_PARAM_PERIODS, 2);
 657         if (err < 0)
 658                 return err;
 659
 660         return 0;
 661 }
 662
 663 /*
 664  * page callback (needed for mmap)
 665  */
 666
 667 static struct page *snd_card_saa7134_page(struct snd_pcm_substream *substream,
 668                                         unsigned long offset)
 669 {
 670         void *pageptr = substream->runtime->dma_area + offset;
 671         return vmalloc_to_page(pageptr);
 672 }
 673
 674 /*
 675  * ALSA capture callbacks definition
 676  */
 677
 678 static struct snd_pcm_ops snd_card_saa7134_capture_ops = {
 679         .open =                 snd_card_saa7134_capture_open,
 680         .close =                snd_card_saa7134_capture_close,
 681         .ioctl =                snd_pcm_lib_ioctl,
 682         .hw_params =            snd_card_saa7134_hw_params,
 683         .hw_free =              snd_card_saa7134_hw_free,
 684         .prepare =              snd_card_saa7134_capture_prepare,
 685         .trigger =              snd_card_saa7134_capture_trigger,
 686         .pointer =              snd_card_saa7134_capture_pointer,
 687         .page =                 snd_card_saa7134_page,
 688 };
 689
 690 /*
 691  * ALSA PCM setup
 692  *
 693  *   Called when initializing the board. Sets up the name and hooks up
 694  *  the callbacks
 695  *
 696  */
 697
 698 static int snd_card_saa7134_pcm(snd_card_saa7134_t *saa7134, int device)
 699 {
 700         struct snd_pcm *pcm;
 701         int err;
 702
 703         if ((err = snd_pcm_new(saa7134->card, "SAA7134 PCM", device, 0, 1, &pcm)) < 0)
 704                 return err;
 705         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_card_saa7134_capture_ops);
 706         pcm->private_data = saa7134;
 707         pcm->info_flags = 0;
 708         strcpy(pcm->name, "SAA7134 PCM");
 709         return 0;
 710 }
 711
 712 #define SAA713x_VOLUME(xname, xindex, addr) \
 713 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
 714   .info = snd_saa7134_volume_info, \
 715   .get = snd_saa7134_volume_get, .put = snd_saa7134_volume_put, \
 716   .private_value = addr }
 717
 718 static int snd_saa7134_volume_info(struct snd_kcontrol * kcontrol,
 719                                    struct snd_ctl_elem_info * uinfo)
 720 {
 721         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 722         uinfo->count = 2;
 723         uinfo->value.integer.min = 0;
 724         uinfo->value.integer.max = 20;
 725         return 0;
 726 }
 727
 728 static int snd_saa7134_volume_get(struct snd_kcontrol * kcontrol,
 729                                   struct snd_ctl_elem_value * ucontrol)
 730 {
 731         snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol);
 732         int addr = kcontrol->private_value;
 733
 734         ucontrol->value.integer.value[0] = chip->mixer_volume[addr][0];
 735         ucontrol->value.integer.value[1] = chip->mixer_volume[addr][1];
 736         return 0;
 737 }
 738
 739 static int snd_saa7134_volume_put(struct snd_kcontrol * kcontrol,
 740                                   struct snd_ctl_elem_value * ucontrol)
 741 {
 742         snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol);
 743         struct saa7134_dev *dev = chip->dev;
 744
 745         int change, addr = kcontrol->private_value;
 746         int left, right;
 747
 748         left = ucontrol->value.integer.value[0];
 749         if (left < 0)
 750                 left = 0;
 751         if (left > 20)
 752                 left = 20;
 753         right = ucontrol->value.integer.value[1];
 754         if (right < 0)
 755                 right = 0;
 756         if (right > 20)
 757                 right = 20;
 758         spin_lock_irq(&chip->mixer_lock);
 759         change = 0;
 760         if (chip->mixer_volume[addr][0] != left) {
 761                 change = 1;
 762                 right = left;
 763         }
 764         if (chip->mixer_volume[addr][1] != right) {
 765                 change = 1;
 766                 left = right;
 767         }
 768         if (change) {
 769                 switch (dev->pci->device) {
 770                         case PCI_DEVICE_ID_PHILIPS_SAA7134:
 771                                 switch (addr) {
 772                                         case MIXER_ADDR_TVTUNER:
 773                                                 left = 20;
 774                                                 break;
 775                                         case MIXER_ADDR_LINE1:
 776                                                 saa_andorb(SAA7134_ANALOG_IO_SELECT,  0x10,
 777                                                            (left > 10) ? 0x00 : 0x10);
 778                                                 break;
 779                                         case MIXER_ADDR_LINE2:
 780                                                 saa_andorb(SAA7134_ANALOG_IO_SELECT,  0x20,
 781                                                            (left > 10) ? 0x00 : 0x20);
 782                                                 break;
 783                                 }
 784                                 break;
 785                         case PCI_DEVICE_ID_PHILIPS_SAA7133:
 786                         case PCI_DEVICE_ID_PHILIPS_SAA7135:
 787                                 switch (addr) {
 788                                         case MIXER_ADDR_TVTUNER:
 789                                                 left = 20;
 790                                                 break;
 791                                         case MIXER_ADDR_LINE1:
 792                                                 saa_andorb(0x0594,  0x10,
 793                                                            (left > 10) ? 0x00 : 0x10);
 794                                                 break;
 795                                         case MIXER_ADDR_LINE2:
 796                                                 saa_andorb(0x0594,  0x20,
 797                                                            (left > 10) ? 0x00 : 0x20);
 798                                                 break;
 799                                 }
 800                                 break;
 801                 }
 802                 chip->mixer_volume[addr][0] = left;
 803                 chip->mixer_volume[addr][1] = right;
 804         }
 805         spin_unlock_irq(&chip->mixer_lock);
 806         return change;
 807 }
 808
 809 #define SAA713x_CAPSRC(xname, xindex, addr) \
 810 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
 811   .info = snd_saa7134_capsrc_info, \
 812   .get = snd_saa7134_capsrc_get, .put = snd_saa7134_capsrc_put, \
 813   .private_value = addr }
 814
 815 static int snd_saa7134_capsrc_info(struct snd_kcontrol * kcontrol,
 816                                    struct snd_ctl_elem_info * uinfo)
 817 {
 818         uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
 819         uinfo->count = 2;
 820         uinfo->value.integer.min = 0;
 821         uinfo->value.integer.max = 1;
 822         return 0;
 823 }
 824
 825 static int snd_saa7134_capsrc_get(struct snd_kcontrol * kcontrol,
 826                                   struct snd_ctl_elem_value * ucontrol)
 827 {
 828         snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol);
 829         int addr = kcontrol->private_value;
 830
 831         spin_lock_irq(&chip->mixer_lock);
 832         ucontrol->value.integer.value[0] = chip->capture_source[addr][0];
 833         ucontrol->value.integer.value[1] = chip->capture_source[addr][1];
 834         spin_unlock_irq(&chip->mixer_lock);
 835
 836         return 0;
 837 }
 838
 839 static int snd_saa7134_capsrc_put(struct snd_kcontrol * kcontrol,
 840                                   struct snd_ctl_elem_value * ucontrol)
 841 {
 842         snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol);
 843         int change, addr = kcontrol->private_value;
 844         int left, right;
 845         u32 anabar, xbarin;
 846         int analog_io, rate;
 847         struct saa7134_dev *dev;
 848
 849         dev = chip->dev;
 850
 851         left = ucontrol->value.integer.value[0] & 1;
 852         right = ucontrol->value.integer.value[1] & 1;
 853         spin_lock_irq(&chip->mixer_lock);
 854
 855         change = chip->capture_source[addr][0] != left ||
 856                  chip->capture_source[addr][1] != right;
 857         chip->capture_source[addr][0] = left;
 858         chip->capture_source[addr][1] = right;
 859         dev->dmasound.input=addr;
 860         spin_unlock_irq(&chip->mixer_lock);
 861
 862
 863         if (change) {
 864           switch (dev->pci->device) {
 865
 866            case PCI_DEVICE_ID_PHILIPS_SAA7134:
 867                 switch (addr) {
 868                         case MIXER_ADDR_TVTUNER:
 869                                 saa_andorb(SAA7134_AUDIO_FORMAT_CTRL, 0xc0, 0xc0);
 870                                 saa_andorb(SAA7134_SIF_SAMPLE_FREQ,   0x03, 0x00);
 871                                 break;
 872                         case MIXER_ADDR_LINE1:
 873                         case MIXER_ADDR_LINE2:
 874                                 analog_io = (MIXER_ADDR_LINE1 == addr) ? 0x00 : 0x08;
 875                                 rate = (32000 == dev->dmasound.rate) ? 0x01 : 0x03;
 876                                 saa_andorb(SAA7134_ANALOG_IO_SELECT,  0x08, analog_io);
 877                                 saa_andorb(SAA7134_AUDIO_FORMAT_CTRL, 0xc0, 0x80);
 878                                 saa_andorb(SAA7134_SIF_SAMPLE_FREQ,   0x03, rate);
 879                                 break;
 880                 }
 881
 882                 break;
 883            case PCI_DEVICE_ID_PHILIPS_SAA7133:
 884            case PCI_DEVICE_ID_PHILIPS_SAA7135:
 885                 xbarin = 0x03; // adc
 886                 anabar = 0;
 887                 switch (addr) {
 888                         case MIXER_ADDR_TVTUNER:
 889                                 xbarin = 0; // Demodulator
 890                                 anabar = 2; // DACs
 891                                 break;
 892                         case MIXER_ADDR_LINE1:
 893                                 anabar = 0;  // aux1, aux1
 894                                 break;
 895                         case MIXER_ADDR_LINE2:
 896                                 anabar = 9;  // aux2, aux2
 897                                 break;
 898                 }
 899
 900                 /* output xbar always main channel */
 901                 saa_dsp_writel(dev, SAA7133_DIGITAL_OUTPUT_SEL1, 0xbbbb10);
 902
 903                 if (left || right) { // We've got data, turn the input on
 904                   saa_dsp_writel(dev, SAA7133_DIGITAL_INPUT_XBAR1, xbarin);
 905                   saa_writel(SAA7133_ANALOG_IO_SELECT, anabar);
 906                 } else {
 907                   saa_dsp_writel(dev, SAA7133_DIGITAL_INPUT_XBAR1, 0);
 908                   saa_writel(SAA7133_ANALOG_IO_SELECT, 0);
 909                 }
 910                 break;
 911           }
 912         }
 913
 914         return change;
 915 }
 916
 917 static struct snd_kcontrol_new snd_saa7134_controls[] = {
 918 SAA713x_VOLUME("Video Volume", 0, MIXER_ADDR_TVTUNER),
 919 SAA713x_CAPSRC("Video Capture Switch", 0, MIXER_ADDR_TVTUNER),
 920 SAA713x_VOLUME("Line Volume", 1, MIXER_ADDR_LINE1),
 921 SAA713x_CAPSRC("Line Capture Switch", 1, MIXER_ADDR_LINE1),
 922 SAA713x_VOLUME("Line Volume", 2, MIXER_ADDR_LINE2),
 923 SAA713x_CAPSRC("Line Capture Switch", 2, MIXER_ADDR_LINE2),
 924 };
 925
 926 /*
 927  * ALSA mixer setup
 928  *
 929  *   Called when initializing the board. Sets up the name and hooks up
 930  *  the callbacks
 931  *
 932  */
 933
 934 static int snd_card_saa7134_new_mixer(snd_card_saa7134_t * chip)
 935 {
 936         struct snd_card *card = chip->card;
 937         unsigned int idx;
 938         int err;
 939
 940         snd_assert(chip != NULL, return -EINVAL);
 941         strcpy(card->mixername, "SAA7134 Mixer");
 942
 943         for (idx = 0; idx < ARRAY_SIZE(snd_saa7134_controls); idx++) {
 944                 if ((err = snd_ctl_add(card, snd_ctl_new1(&snd_saa7134_controls[idx], chip))) < 0)
 945                         return err;
 946         }
 947         return 0;
 948 }
 949
 950 static void snd_saa7134_free(struct snd_card * card)
 951 {
 952         snd_card_saa7134_t *chip = card->private_data;
 953
 954         if (chip->dev->dmasound.priv_data == NULL)
 955                 return;
 956
 957         if (chip->irq >= 0) {
 958                 synchronize_irq(chip->irq);
 959                 free_irq(chip->irq, &chip->dev->dmasound);
 960         }
 961
 962         chip->dev->dmasound.priv_data = NULL;
 963
 964 }
 965
 966 /*
 967  * ALSA initialization
 968  *
 969  *   Called by the init routine, once for each saa7134 device present,
 970  *  it creates the basic structures and registers the ALSA devices
 971  *
 972  */
 973
 974 static int alsa_card_saa7134_create(struct saa7134_dev *dev, int devnum)
 975 {
 976
 977         struct snd_card *card;
 978         snd_card_saa7134_t *chip;
 979         int err;
 980
 981
 982         if (devnum >= SNDRV_CARDS)
 983                 return -ENODEV;
 984         if (!enable[devnum])
 985                 return -ENODEV;
 986
 987         card = snd_card_new(index[devnum], id[devnum], THIS_MODULE, sizeof(snd_card_saa7134_t));
 988
 989         if (card == NULL)
 990                 return -ENOMEM;
 991
 992         strcpy(card->driver, "SAA7134");
 993
 994         /* Card "creation" */
 995
 996         card->private_free = snd_saa7134_free;
 997         chip = (snd_card_saa7134_t *) card->private_data;
 998
 999         spin_lock_init(&chip->lock);
1000         spin_lock_init(&chip->mixer_lock);
1001
1002         chip->dev = dev;
1003
1004         chip->card = card;
1005
1006         chip->pci = dev->pci;
1007         chip->iobase = pci_resource_start(dev->pci, 0);
1008
1009
1010         err = request_irq(dev->pci->irq, saa7134_alsa_irq,
1011                                 IRQF_SHARED | IRQF_DISABLED, dev->name,
1012                                 (void*) &dev->dmasound);
1013
1014         if (err < 0) {
1015                 printk(KERN_ERR "%s: can't get IRQ %d for ALSA\n",
1016                         dev->name, dev->pci->irq);
1017                 goto __nodev;
1018         }
1019
1020         chip->irq = dev->pci->irq;
1021
1022         mutex_init(&dev->dmasound.lock);
1023
1024         if ((err = snd_card_saa7134_new_mixer(chip)) < 0)
1025                 goto __nodev;
1026
1027         if ((err = snd_card_saa7134_pcm(chip, 0)) < 0)
1028                 goto __nodev;
1029
1030         snd_card_set_dev(card, &chip->pci->dev);
1031
1032         /* End of "creation" */
1033
1034         strcpy(card->shortname, "SAA7134");
1035         sprintf(card->longname, "%s at 0x%lx irq %d",
1036                 chip->dev->name, chip->iobase, chip->irq);
1037
1038         printk(KERN_INFO "%s/alsa: %s registered as card %d\n",dev->name,card->longname,index[devnum]);
1039
1040         if ((err = snd_card_register(card)) == 0) {
1041                 snd_saa7134_cards[devnum] = card;
1042                 return 0;
1043         }
1044
1045 __nodev:
1046         snd_card_free(card);
1047         return err;
1048 }
1049
1050
1051 static int alsa_device_init(struct saa7134_dev *dev)
1052 {
1053         dev->dmasound.priv_data = dev;
1054         alsa_card_saa7134_create(dev,dev->nr);
1055         return 1;
1056 }
1057
1058 static int alsa_device_exit(struct saa7134_dev *dev)
1059 {
1060
1061         snd_card_free(snd_saa7134_cards[dev->nr]);
1062         snd_saa7134_cards[dev->nr] = NULL;
1063         return 1;
1064 }
1065
1066 /*
1067  * Module initializer
1068  *
1069  * Loops through present saa7134 cards, and assigns an ALSA device
1070  * to each one
1071  *
1072  */
1073
1074 static int saa7134_alsa_init(void)
1075 {
1076         struct saa7134_dev *dev = NULL;
1077         struct list_head *list;
1078
1079         saa7134_dmasound_init = alsa_device_init;
1080         saa7134_dmasound_exit = alsa_device_exit;
1081
1082         printk(KERN_INFO "saa7134 ALSA driver for DMA sound loaded\n");
1083
1084         list_for_each(list,&saa7134_devlist) {
1085                 dev = list_entry(list, struct saa7134_dev, devlist);
1086                 alsa_device_init(dev);
1087         }
1088
1089         if (dev == NULL)
1090                 printk(KERN_INFO "saa7134 ALSA: no saa7134 cards found\n");
1091
1092         return 0;
1093
1094 }
1095
1096 /*
1097  * Module destructor
1098  */
1099
1100 static void saa7134_alsa_exit(void)
1101 {
1102         int idx;
1103
1104         for (idx = 0; idx < SNDRV_CARDS; idx++) {
1105                 snd_card_free(snd_saa7134_cards[idx]);
1106         }
1107
1108         saa7134_dmasound_init = NULL;
1109         saa7134_dmasound_exit = NULL;
1110         printk(KERN_INFO "saa7134 ALSA driver for DMA sound unloaded\n");
1111
1112         return;
1113 }
1114
1115 /* We initialize this late, to make sure the sound system is up and running */
1116 late_initcall(saa7134_alsa_init);
1117 module_exit(saa7134_alsa_exit);
1118 MODULE_LICENSE("GPL");
1119 MODULE_AUTHOR("Ricardo Cerqueira");
1120
1121
1122