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/pcm_params.h>
  34 #include <sound/initval.h>
  35 #include <linux/interrupt.h>
  36
  37 #include "saa7134.h"
  38 #include "saa7134-reg.h"
  39
  40 static unsigned int debug  = 0;
  41 module_param(debug, int, 0644);
  42 MODULE_PARM_DESC(debug,"enable debug messages [alsa]");
  43
  44 /*
  45  * Configuration macros
  46  */
  47
  48 /* defaults */
  49 #define MIXER_ADDR_TVTUNER      0
  50 #define MIXER_ADDR_LINE1        1
  51 #define MIXER_ADDR_LINE2        2
  52 #define MIXER_ADDR_LAST         2
  53
  54 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;      /* Index 0-MAX */
  55 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;       /* ID for this card */
  56 static int enable[SNDRV_CARDS] = {1, [1 ... (SNDRV_CARDS - 1)] = 0};
  57
  58 module_param_array(index, int, NULL, 0444);
  59 MODULE_PARM_DESC(index, "Index value for SAA7134 capture interface(s).");
  60
  61 int position;
  62
  63 #define dprintk(fmt, arg...)    if (debug) \
  64         printk(KERN_DEBUG "%s/alsa: " fmt, dev->name , ## arg)
  65
  66 /*
  67  * Main chip structure
  68  */
  69 typedef struct snd_card_saa7134 {
  70         snd_card_t *card;
  71         spinlock_t mixer_lock;
  72         int mixer_volume[MIXER_ADDR_LAST+1][2];
  73         int capture_source[MIXER_ADDR_LAST+1][2];
  74         struct pci_dev *pci;
  75         struct saa7134_dev *dev;
  76
  77         unsigned long iobase;
  78         int irq;
  79
  80         spinlock_t lock;
  81 } snd_card_saa7134_t;
  82
  83
  84
  85 /*
  86  * PCM structure
  87  */
  88
  89 typedef struct snd_card_saa7134_pcm {
  90         struct saa7134_dev *dev;
  91
  92         spinlock_t lock;
  93
  94         snd_pcm_substream_t *substream;
  95 } snd_card_saa7134_pcm_t;
  96
  97 static snd_card_t *snd_saa7134_cards[SNDRV_CARDS];
  98
  99
 100 /*
 101  * saa7134 DMA audio stop
 102  *
 103  *   Called when the capture device is released or the buffer overflows
 104  *
 105  *   - Copied verbatim from saa7134-oss's dsp_dma_stop.
 106  *
 107  */
 108
 109 static void saa7134_dma_stop(struct saa7134_dev *dev)
 110 {
 111         dev->dmasound.dma_blk     = -1;
 112         dev->dmasound.dma_running = 0;
 113         saa7134_set_dmabits(dev);
 114 }
 115
 116 /*
 117  * saa7134 DMA audio start
 118  *
 119  *   Called when preparing the capture device for use
 120  *
 121  *   - Copied verbatim from saa7134-oss's dsp_dma_start.
 122  *
 123  */
 124
 125 static void saa7134_dma_start(struct saa7134_dev *dev)
 126 {
 127         dev->dmasound.dma_blk     = 0;
 128         dev->dmasound.dma_running = 1;
 129         saa7134_set_dmabits(dev);
 130 }
 131
 132 /*
 133  * saa7134 audio DMA IRQ handler
 134  *
 135  *   Called whenever we get an SAA7134_IRQ_REPORT_DONE_RA3 interrupt
 136  *   Handles shifting between the 2 buffers, manages the read counters,
 137  *  and notifies ALSA when periods elapse
 138  *
 139  *   - Mostly copied from saa7134-oss's saa7134_irq_oss_done.
 140  *
 141  */
 142
 143 void saa7134_irq_alsa_done(struct saa7134_dev *dev, 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, struct pt_regs *regs)
 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,report);
 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(snd_pcm_substream_t * substream,
 250                                           int cmd)
 251 {
 252         snd_pcm_runtime_t *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         if (!dev->dmasound.blksize)
 307                 BUG();
 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(snd_pcm_substream_t * substream)
 332 {
 333         snd_pcm_runtime_t *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 snd_card_saa7134_capture_pointer(snd_pcm_substream_t * substream)
 421 {
 422         snd_pcm_runtime_t *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 snd_pcm_hardware_t 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 =          2,
 460         .periods_max =          1024,
 461 };
 462
 463 static void snd_card_saa7134_runtime_free(snd_pcm_runtime_t *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(snd_pcm_substream_t * substream,
 481                                     snd_pcm_hw_params_t * 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 >= 2, 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_dma_pci_unmap(dev->pci, &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_dma_pci_map(dev->pci, &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_dma_pci_unmap(dev->pci, &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_dma_pci_unmap(dev->pci, &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
 546         return 1;
 547
 548 }
 549
 550 /*
 551  * ALSA hardware release
 552  *
 553  *   - One of the ALSA capture callbacks.
 554  *
 555  *   Called after closing the device, but before snd_card_saa7134_capture_close
 556  *   It stops the DMA audio and releases the buffers.
 557  *
 558  */
 559
 560 static int snd_card_saa7134_hw_free(snd_pcm_substream_t * substream)
 561 {
 562         snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
 563         struct saa7134_dev *dev;
 564
 565         dev = saa7134->dev;
 566
 567         if (substream->runtime->dma_area) {
 568                 saa7134_pgtable_free(dev->pci, &dev->dmasound.pt);
 569                 videobuf_dma_pci_unmap(dev->pci, &dev->dmasound.dma);
 570                 dsp_buffer_free(dev);
 571                 substream->runtime->dma_area = NULL;
 572         }
 573
 574         return 0;
 575 }
 576
 577 /*
 578  * ALSA capture finish
 579  *
 580  *   - One of the ALSA capture callbacks.
 581  *
 582  *   Called after closing the device.
 583  *
 584  */
 585
 586 static int snd_card_saa7134_capture_close(snd_pcm_substream_t * substream)
 587 {
 588         return 0;
 589 }
 590
 591 /*
 592  * ALSA capture start
 593  *
 594  *   - One of the ALSA capture callbacks.
 595  *
 596  *   Called when opening the device. It creates and populates the PCM
 597  *  structure
 598  *
 599  */
 600
 601 static int snd_card_saa7134_capture_open(snd_pcm_substream_t * substream)
 602 {
 603         snd_pcm_runtime_t *runtime = substream->runtime;
 604         snd_card_saa7134_pcm_t *pcm;
 605         snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
 606         struct saa7134_dev *dev = saa7134->dev;
 607         int err;
 608
 609         down(&dev->dmasound.lock);
 610
 611         dev->dmasound.read_count  = 0;
 612         dev->dmasound.read_offset = 0;
 613
 614         up(&dev->dmasound.lock);
 615
 616         pcm = kzalloc(sizeof(*pcm), GFP_KERNEL);
 617         if (pcm == NULL)
 618                 return -ENOMEM;
 619
 620         pcm->dev=saa7134->dev;
 621
 622         spin_lock_init(&pcm->lock);
 623
 624         pcm->substream = substream;
 625         runtime->private_data = pcm;
 626         runtime->private_free = snd_card_saa7134_runtime_free;
 627         runtime->hw = snd_card_saa7134_capture;
 628
 629         if ((err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
 630                 return err;
 631
 632         return 0;
 633 }
 634
 635 /*
 636  * ALSA capture callbacks definition
 637  */
 638
 639 static snd_pcm_ops_t snd_card_saa7134_capture_ops = {
 640         .open =                 snd_card_saa7134_capture_open,
 641         .close =                snd_card_saa7134_capture_close,
 642         .ioctl =                snd_pcm_lib_ioctl,
 643         .hw_params =            snd_card_saa7134_hw_params,
 644         .hw_free =              snd_card_saa7134_hw_free,
 645         .prepare =              snd_card_saa7134_capture_prepare,
 646         .trigger =              snd_card_saa7134_capture_trigger,
 647         .pointer =              snd_card_saa7134_capture_pointer,
 648 };
 649
 650 /*
 651  * ALSA PCM setup
 652  *
 653  *   Called when initializing the board. Sets up the name and hooks up
 654  *  the callbacks
 655  *
 656  */
 657
 658 static int snd_card_saa7134_pcm(snd_card_saa7134_t *saa7134, int device)
 659 {
 660         snd_pcm_t *pcm;
 661         int err;
 662
 663         if ((err = snd_pcm_new(saa7134->card, "SAA7134 PCM", device, 0, 1, &pcm)) < 0)
 664                 return err;
 665         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_card_saa7134_capture_ops);
 666         pcm->private_data = saa7134;
 667         pcm->info_flags = 0;
 668         strcpy(pcm->name, "SAA7134 PCM");
 669         return 0;
 670 }
 671
 672 #define SAA713x_VOLUME(xname, xindex, addr) \
 673 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
 674   .info = snd_saa7134_volume_info, \
 675   .get = snd_saa7134_volume_get, .put = snd_saa7134_volume_put, \
 676   .private_value = addr }
 677
 678 static int snd_saa7134_volume_info(snd_kcontrol_t * kcontrol, snd_ctl_elem_info_t * uinfo)
 679 {
 680         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 681         uinfo->count = 2;
 682         uinfo->value.integer.min = 0;
 683         uinfo->value.integer.max = 20;
 684         return 0;
 685 }
 686
 687 static int snd_saa7134_volume_get(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
 688 {
 689         snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol);
 690         int addr = kcontrol->private_value;
 691
 692         ucontrol->value.integer.value[0] = chip->mixer_volume[addr][0];
 693         ucontrol->value.integer.value[1] = chip->mixer_volume[addr][1];
 694         return 0;
 695 }
 696
 697 static int snd_saa7134_volume_put(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
 698 {
 699         snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol);
 700         int change, addr = kcontrol->private_value;
 701         int left, right;
 702
 703         left = ucontrol->value.integer.value[0];
 704         if (left < 0)
 705                 left = 0;
 706         if (left > 20)
 707                 left = 20;
 708         right = ucontrol->value.integer.value[1];
 709         if (right < 0)
 710                 right = 0;
 711         if (right > 20)
 712                 right = 20;
 713         spin_lock_irq(&chip->mixer_lock);
 714         change = chip->mixer_volume[addr][0] != left ||
 715                  chip->mixer_volume[addr][1] != right;
 716         chip->mixer_volume[addr][0] = left;
 717         chip->mixer_volume[addr][1] = right;
 718         spin_unlock_irq(&chip->mixer_lock);
 719         return change;
 720 }
 721
 722 #define SAA713x_CAPSRC(xname, xindex, addr) \
 723 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
 724   .info = snd_saa7134_capsrc_info, \
 725   .get = snd_saa7134_capsrc_get, .put = snd_saa7134_capsrc_put, \
 726   .private_value = addr }
 727
 728 static int snd_saa7134_capsrc_info(snd_kcontrol_t * kcontrol, snd_ctl_elem_info_t * uinfo)
 729 {
 730         uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
 731         uinfo->count = 2;
 732         uinfo->value.integer.min = 0;
 733         uinfo->value.integer.max = 1;
 734         return 0;
 735 }
 736
 737 static int snd_saa7134_capsrc_get(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
 738 {
 739         snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol);
 740         int addr = kcontrol->private_value;
 741
 742         spin_lock_irq(&chip->mixer_lock);
 743         ucontrol->value.integer.value[0] = chip->capture_source[addr][0];
 744         ucontrol->value.integer.value[1] = chip->capture_source[addr][1];
 745         spin_unlock_irq(&chip->mixer_lock);
 746
 747         return 0;
 748 }
 749
 750 static int snd_saa7134_capsrc_put(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
 751 {
 752         snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol);
 753         int change, addr = kcontrol->private_value;
 754         int left, right;
 755         u32 anabar, xbarin;
 756         int analog_io, rate;
 757         struct saa7134_dev *dev;
 758
 759         dev = chip->dev;
 760
 761         left = ucontrol->value.integer.value[0] & 1;
 762         right = ucontrol->value.integer.value[1] & 1;
 763         spin_lock_irq(&chip->mixer_lock);
 764
 765         change = chip->capture_source[addr][0] != left ||
 766                  chip->capture_source[addr][1] != right;
 767         chip->capture_source[addr][0] = left;
 768         chip->capture_source[addr][1] = right;
 769         dev->dmasound.input=addr;
 770         spin_unlock_irq(&chip->mixer_lock);
 771
 772
 773         if (change) {
 774           switch (dev->pci->device) {
 775
 776            case PCI_DEVICE_ID_PHILIPS_SAA7134:
 777                 switch (addr) {
 778                         case MIXER_ADDR_TVTUNER:
 779                                 saa_andorb(SAA7134_AUDIO_FORMAT_CTRL, 0xc0, 0xc0);
 780                                 saa_andorb(SAA7134_SIF_SAMPLE_FREQ,   0x03, 0x00);
 781                                 break;
 782                         case MIXER_ADDR_LINE1:
 783                         case MIXER_ADDR_LINE2:
 784                                 analog_io = (MIXER_ADDR_LINE1 == addr) ? 0x00 : 0x08;
 785                                 rate = (32000 == dev->dmasound.rate) ? 0x01 : 0x03;
 786                                 saa_andorb(SAA7134_ANALOG_IO_SELECT,  0x08, analog_io);
 787                                 saa_andorb(SAA7134_AUDIO_FORMAT_CTRL, 0xc0, 0x80);
 788                                 saa_andorb(SAA7134_SIF_SAMPLE_FREQ,   0x03, rate);
 789                                 break;
 790                 }
 791
 792                 break;
 793            case PCI_DEVICE_ID_PHILIPS_SAA7133:
 794            case PCI_DEVICE_ID_PHILIPS_SAA7135:
 795                 xbarin = 0x03; // adc
 796                 anabar = 0;
 797                 switch (addr) {
 798                         case MIXER_ADDR_TVTUNER:
 799                                 xbarin = 0; // Demodulator
 800                                 anabar = 2; // DACs
 801                                 break;
 802                         case MIXER_ADDR_LINE1:
 803                                 anabar = 0;  // aux1, aux1
 804                                 break;
 805                         case MIXER_ADDR_LINE2:
 806                                 anabar = 9;  // aux2, aux2
 807                                 break;
 808                 }
 809
 810                 /* output xbar always main channel */
 811                 saa_dsp_writel(dev, SAA7133_DIGITAL_OUTPUT_SEL1, 0xbbbb10);
 812
 813                 if (left || right) { // We've got data, turn the input on
 814                   saa_dsp_writel(dev, SAA7133_DIGITAL_INPUT_XBAR1, xbarin);
 815                   saa_writel(SAA7133_ANALOG_IO_SELECT, anabar);
 816                 } else {
 817                   saa_dsp_writel(dev, SAA7133_DIGITAL_INPUT_XBAR1, 0);
 818                   saa_writel(SAA7133_ANALOG_IO_SELECT, 0);
 819                 }
 820                 break;
 821           }
 822         }
 823
 824         return change;
 825 }
 826
 827 static snd_kcontrol_new_t snd_saa7134_controls[] = {
 828 SAA713x_VOLUME("Video Volume", 0, MIXER_ADDR_TVTUNER),
 829 SAA713x_CAPSRC("Video Capture Switch", 0, MIXER_ADDR_TVTUNER),
 830 SAA713x_VOLUME("Line Volume", 1, MIXER_ADDR_LINE1),
 831 SAA713x_CAPSRC("Line Capture Switch", 1, MIXER_ADDR_LINE1),
 832 SAA713x_VOLUME("Line Volume", 2, MIXER_ADDR_LINE2),
 833 SAA713x_CAPSRC("Line Capture Switch", 2, MIXER_ADDR_LINE2),
 834 };
 835
 836 /*
 837  * ALSA mixer setup
 838  *
 839  *   Called when initializing the board. Sets up the name and hooks up
 840  *  the callbacks
 841  *
 842  */
 843
 844 static int snd_card_saa7134_new_mixer(snd_card_saa7134_t * chip)
 845 {
 846         snd_card_t *card = chip->card;
 847         unsigned int idx;
 848         int err;
 849
 850         snd_assert(chip != NULL, return -EINVAL);
 851         strcpy(card->mixername, "SAA7134 Mixer");
 852
 853         for (idx = 0; idx < ARRAY_SIZE(snd_saa7134_controls); idx++) {
 854                 if ((err = snd_ctl_add(card, snd_ctl_new1(&snd_saa7134_controls[idx], chip))) < 0)
 855                         return err;
 856         }
 857         return 0;
 858 }
 859
 860 static void snd_saa7134_free(snd_card_t * card)
 861 {
 862         snd_card_saa7134_t *chip = card->private_data;
 863
 864         if (chip->dev->dmasound.priv_data == NULL)
 865                 return;
 866
 867         if (chip->irq >= 0) {
 868                 synchronize_irq(chip->irq);
 869                 free_irq(chip->irq, &chip->dev->dmasound);
 870         }
 871
 872         chip->dev->dmasound.priv_data = NULL;
 873
 874 }
 875
 876 /*
 877  * ALSA initialization
 878  *
 879  *   Called by the init routine, once for each saa7134 device present,
 880  *  it creates the basic structures and registers the ALSA devices
 881  *
 882  */
 883
 884 int alsa_card_saa7134_create(struct saa7134_dev *dev, int devnum)
 885 {
 886
 887         snd_card_t *card;
 888         snd_card_saa7134_t *chip;
 889         int err;
 890
 891
 892         if (devnum >= SNDRV_CARDS)
 893                 return -ENODEV;
 894         if (!enable[devnum])
 895                 return -ENODEV;
 896
 897         card = snd_card_new(index[devnum], id[devnum], THIS_MODULE, sizeof(snd_card_saa7134_t));
 898
 899         if (card == NULL)
 900                 return -ENOMEM;
 901
 902         strcpy(card->driver, "SAA7134");
 903
 904         /* Card "creation" */
 905
 906         card->private_free = snd_saa7134_free;
 907         chip = (snd_card_saa7134_t *) card->private_data;
 908
 909         spin_lock_init(&chip->lock);
 910         spin_lock_init(&chip->mixer_lock);
 911
 912         chip->dev = dev;
 913
 914         chip->card = card;
 915
 916         chip->pci = dev->pci;
 917         chip->iobase = pci_resource_start(dev->pci, 0);
 918
 919
 920         err = request_irq(dev->pci->irq, saa7134_alsa_irq,
 921                                 SA_SHIRQ | SA_INTERRUPT, dev->name,
 922                                 (void*) &dev->dmasound);
 923
 924         if (err < 0) {
 925                 printk(KERN_ERR "%s: can't get IRQ %d for ALSA\n",
 926                         dev->name, dev->pci->irq);
 927                 goto __nodev;
 928         }
 929
 930         chip->irq = dev->pci->irq;
 931
 932         init_MUTEX(&dev->dmasound.lock);
 933
 934         if ((err = snd_card_saa7134_new_mixer(chip)) < 0)
 935                 goto __nodev;
 936
 937         if ((err = snd_card_saa7134_pcm(chip, 0)) < 0)
 938                 goto __nodev;
 939
 940         snd_card_set_dev(card, &chip->pci->dev);
 941
 942         /* End of "creation" */
 943
 944         strcpy(card->shortname, "SAA7134");
 945         sprintf(card->longname, "%s at 0x%lx irq %d",
 946                 chip->dev->name, chip->iobase, chip->irq);
 947
 948         if ((err = snd_card_register(card)) == 0) {
 949                 snd_saa7134_cards[devnum] = card;
 950                 return 0;
 951         }
 952
 953 __nodev:
 954         snd_card_free(card);
 955         return err;
 956 }
 957
 958 /*
 959  * Module initializer
 960  *
 961  * Loops through present saa7134 cards, and assigns an ALSA device
 962  * to each one
 963  *
 964  */
 965
 966 static int saa7134_alsa_init(void)
 967 {
 968         struct saa7134_dev *dev = NULL;
 969         struct list_head *list;
 970
 971         position = 0;
 972
 973         printk(KERN_INFO "saa7134 ALSA driver for DMA sound loaded\n");
 974
 975         list_for_each(list,&saa7134_devlist) {
 976                 dev = list_entry(list, struct saa7134_dev, devlist);
 977                 if (dev->dmasound.priv_data == NULL) {
 978                         dev->dmasound.priv_data = dev;
 979                         alsa_card_saa7134_create(dev,position);
 980                         position++;
 981                 } else {
 982                         printk(KERN_ERR "saa7134 ALSA: DMA sound is being handled by OSS. ignoring %s\n",dev->name);
 983                         return -EBUSY;
 984                 }
 985         }
 986
 987         if (dev == NULL)
 988                 printk(KERN_INFO "saa7134 ALSA: no saa7134 cards found\n");
 989
 990         return 0;
 991 }
 992
 993 /*
 994  * Module destructor
 995  */
 996
 997 void saa7134_alsa_exit(void)
 998 {
 999         int idx;
1000
1001         for (idx = 0; idx < SNDRV_CARDS; idx++) {
1002                 snd_card_free(snd_saa7134_cards[idx]);
1003         }
1004
1005         printk(KERN_INFO "saa7134 ALSA driver for DMA sound unloaded\n");
1006
1007         return;
1008 }
1009
1010 module_init(saa7134_alsa_init);
1011 module_exit(saa7134_alsa_exit);
1012 MODULE_LICENSE("GPL");
1013 MODULE_AUTHOR("Ricardo Cerqueira");