git.oblomov.eu Git - linux-2.6/blob - drivers/media/video/saa7134/saa7134-alsa.c

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