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/driver.h>
  25 #include <sound/core.h>
  26 #include <sound/control.h>
  27 #include <sound/pcm.h>
  28 #include <sound/pcm_params.h>
  29 #include <sound/initval.h>
  30 #include <linux/interrupt.h>
  31
  32 #include "saa7134.h"
  33 #include "saa7134-reg.h"
  34
  35 static unsigned int debug  = 0;
  36 module_param(debug, int, 0644);
  37 MODULE_PARM_DESC(debug,"enable debug messages [alsa]");
  38
  39 /*
  40  * Configuration macros
  41  */
  42
  43 /* defaults */
  44 #define MIXER_ADDR_TVTUNER      0
  45 #define MIXER_ADDR_LINE1        1
  46 #define MIXER_ADDR_LINE2        2
  47 #define MIXER_ADDR_LAST         2
  48
  49
  50 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;      /* Index 0-MAX */
  51 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;       /* ID for this card */
  52 static int enable[SNDRV_CARDS] = {1, [1 ... (SNDRV_CARDS - 1)] = 1};
  53
  54 module_param_array(index, int, NULL, 0444);
  55 module_param_array(enable, int, NULL, 0444);
  56 MODULE_PARM_DESC(index, "Index value for SAA7134 capture interface(s).");
  57 MODULE_PARM_DESC(enable, "Enable (or not) the SAA7134 capture interface(s).");
  58
  59 #define dprintk(fmt, arg...)    if (debug) \
  60         printk(KERN_DEBUG "%s/alsa: " fmt, dev->name , ##arg)
  61
  62
  63
  64 /*
  65  * Main chip structure
  66  */
  67
  68 typedef struct snd_card_saa7134 {
  69         struct snd_card *card;
  70         spinlock_t mixer_lock;
  71         int mixer_volume[MIXER_ADDR_LAST+1][2];
  72         int capture_source[MIXER_ADDR_LAST+1][2];
  73         struct pci_dev *pci;
  74         struct saa7134_dev *dev;
  75
  76         unsigned long iobase;
  77         s16 irq;
  78         u16 mute_was_on;
  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         struct snd_pcm_substream *substream;
  95 } snd_card_saa7134_pcm_t;
  96
  97 static struct snd_card *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 static void saa7134_irq_alsa_done(struct saa7134_dev *dev,
 144                                   unsigned long status)
 145 {
 146         int next_blk, reg = 0;
 147
 148         spin_lock(&dev->slock);
 149         if (UNSET == dev->dmasound.dma_blk) {
 150                 dprintk("irq: recording stopped\n");
 151                 goto done;
 152         }
 153         if (0 != (status & 0x0f000000))
 154                 dprintk("irq: lost %ld\n", (status >> 24) & 0x0f);
 155         if (0 == (status & 0x10000000)) {
 156                 /* odd */
 157                 if (0 == (dev->dmasound.dma_blk & 0x01))
 158                         reg = SAA7134_RS_BA1(6);
 159         } else {
 160                 /* even */
 161                 if (1 == (dev->dmasound.dma_blk & 0x01))
 162                         reg = SAA7134_RS_BA2(6);
 163         }
 164         if (0 == reg) {
 165                 dprintk("irq: field oops [%s]\n",
 166                         (status & 0x10000000) ? "even" : "odd");
 167                 goto done;
 168         }
 169
 170         if (dev->dmasound.read_count >= dev->dmasound.blksize * (dev->dmasound.blocks-2)) {
 171                 dprintk("irq: overrun [full=%d/%d] - Blocks in %d\n",dev->dmasound.read_count,
 172                         dev->dmasound.bufsize, dev->dmasound.blocks);
 173                 spin_unlock(&dev->slock);
 174                 snd_pcm_stop(dev->dmasound.substream,SNDRV_PCM_STATE_XRUN);
 175                 return;
 176         }
 177
 178         /* next block addr */
 179         next_blk = (dev->dmasound.dma_blk + 2) % dev->dmasound.blocks;
 180         saa_writel(reg,next_blk * dev->dmasound.blksize);
 181         if (debug > 2)
 182                 dprintk("irq: ok, %s, next_blk=%d, addr=%x, blocks=%u, size=%u, read=%u\n",
 183                         (status & 0x10000000) ? "even" : "odd ", next_blk,
 184                         next_blk * dev->dmasound.blksize, dev->dmasound.blocks, dev->dmasound.blksize, dev->dmasound.read_count);
 185
 186         /* update status & wake waiting readers */
 187         dev->dmasound.dma_blk = (dev->dmasound.dma_blk + 1) % dev->dmasound.blocks;
 188         dev->dmasound.read_count += dev->dmasound.blksize;
 189
 190         dev->dmasound.recording_on = reg;
 191
 192         if (dev->dmasound.read_count >= snd_pcm_lib_period_bytes(dev->dmasound.substream)) {
 193                 spin_unlock(&dev->slock);
 194                 snd_pcm_period_elapsed(dev->dmasound.substream);
 195                 spin_lock(&dev->slock);
 196         }
 197
 198  done:
 199         spin_unlock(&dev->slock);
 200
 201 }
 202
 203 /*
 204  * IRQ request handler
 205  *
 206  *   Runs along with saa7134's IRQ handler, discards anything that isn't
 207  *   DMA sound
 208  *
 209  */
 210
 211 static irqreturn_t saa7134_alsa_irq(int irq, void *dev_id)
 212 {
 213         struct saa7134_dmasound *dmasound = dev_id;
 214         struct saa7134_dev *dev = dmasound->priv_data;
 215
 216         unsigned long report, status;
 217         int loop, handled = 0;
 218
 219         for (loop = 0; loop < 10; loop++) {
 220                 report = saa_readl(SAA7134_IRQ_REPORT);
 221                 status = saa_readl(SAA7134_IRQ_STATUS);
 222
 223                 if (report & SAA7134_IRQ_REPORT_DONE_RA3) {
 224                         handled = 1;
 225                         saa_writel(SAA7134_IRQ_REPORT,
 226                                    SAA7134_IRQ_REPORT_DONE_RA3);
 227                         saa7134_irq_alsa_done(dev, status);
 228                 } else {
 229                         goto out;
 230                 }
 231         }
 232
 233         if (loop == 10) {
 234                 dprintk("error! looping IRQ!");
 235         }
 236
 237 out:
 238         return IRQ_RETVAL(handled);
 239 }
 240
 241 /*
 242  * ALSA capture trigger
 243  *
 244  *   - One of the ALSA capture callbacks.
 245  *
 246  *   Called whenever a capture is started or stopped. Must be defined,
 247  *   but there's nothing we want to do here
 248  *
 249  */
 250
 251 static int snd_card_saa7134_capture_trigger(struct snd_pcm_substream * substream,
 252                                           int cmd)
 253 {
 254         struct snd_pcm_runtime *runtime = substream->runtime;
 255         snd_card_saa7134_pcm_t *pcm = runtime->private_data;
 256         struct saa7134_dev *dev=pcm->dev;
 257         int err = 0;
 258
 259         spin_lock(&dev->slock);
 260         if (cmd == SNDRV_PCM_TRIGGER_START) {
 261                 /* start dma */
 262                 saa7134_dma_start(dev);
 263         } else if (cmd == SNDRV_PCM_TRIGGER_STOP) {
 264                 /* stop dma */
 265                 saa7134_dma_stop(dev);
 266         } else {
 267                 err = -EINVAL;
 268         }
 269         spin_unlock(&dev->slock);
 270
 271         return err;
 272 }
 273
 274 /*
 275  * DMA buffer initialization
 276  *
 277  *   Uses V4L functions to initialize the DMA. Shouldn't be necessary in
 278  *  ALSA, but I was unable to use ALSA's own DMA, and had to force the
 279  *  usage of V4L's
 280  *
 281  *   - Copied verbatim from saa7134-oss.
 282  *
 283  */
 284
 285 static int dsp_buffer_init(struct saa7134_dev *dev)
 286 {
 287         int err;
 288
 289         BUG_ON(!dev->dmasound.bufsize);
 290
 291         videobuf_dma_init(&dev->dmasound.dma);
 292         err = videobuf_dma_init_kernel(&dev->dmasound.dma, PCI_DMA_FROMDEVICE,
 293                                        (dev->dmasound.bufsize + PAGE_SIZE) >> PAGE_SHIFT);
 294         if (0 != err)
 295                 return err;
 296         return 0;
 297 }
 298
 299 /*
 300  * DMA buffer release
 301  *
 302  *   Called after closing the device, during snd_card_saa7134_capture_close
 303  *
 304  */
 305
 306 static int dsp_buffer_free(struct saa7134_dev *dev)
 307 {
 308         BUG_ON(!dev->dmasound.blksize);
 309
 310         videobuf_dma_free(&dev->dmasound.dma);
 311
 312         dev->dmasound.blocks  = 0;
 313         dev->dmasound.blksize = 0;
 314         dev->dmasound.bufsize = 0;
 315
 316         return 0;
 317 }
 318
 319
 320 /*
 321  * ALSA PCM preparation
 322  *
 323  *   - One of the ALSA capture callbacks.
 324  *
 325  *   Called right after the capture device is opened, this function configures
 326  *  the buffer using the previously defined functions, allocates the memory,
 327  *  sets up the hardware registers, and then starts the DMA. When this function
 328  *  returns, the audio should be flowing.
 329  *
 330  */
 331
 332 static int snd_card_saa7134_capture_prepare(struct snd_pcm_substream * substream)
 333 {
 334         struct snd_pcm_runtime *runtime = substream->runtime;
 335         int bswap, sign;
 336         u32 fmt, control;
 337         snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
 338         struct saa7134_dev *dev;
 339         snd_card_saa7134_pcm_t *pcm = runtime->private_data;
 340
 341         pcm->dev->dmasound.substream = substream;
 342
 343         dev = saa7134->dev;
 344
 345         if (snd_pcm_format_width(runtime->format) == 8)
 346                 fmt = 0x00;
 347         else
 348                 fmt = 0x01;
 349
 350         if (snd_pcm_format_signed(runtime->format))
 351                 sign = 1;
 352         else
 353                 sign = 0;
 354
 355         if (snd_pcm_format_big_endian(runtime->format))
 356                 bswap = 1;
 357         else
 358                 bswap = 0;
 359
 360         switch (dev->pci->device) {
 361           case PCI_DEVICE_ID_PHILIPS_SAA7134:
 362                 if (1 == runtime->channels)
 363                         fmt |= (1 << 3);
 364                 if (2 == runtime->channels)
 365                         fmt |= (3 << 3);
 366                 if (sign)
 367                         fmt |= 0x04;
 368
 369                 fmt |= (MIXER_ADDR_TVTUNER == dev->dmasound.input) ? 0xc0 : 0x80;
 370                 saa_writeb(SAA7134_NUM_SAMPLES0, ((dev->dmasound.blksize - 1) & 0x0000ff));
 371                 saa_writeb(SAA7134_NUM_SAMPLES1, ((dev->dmasound.blksize - 1) & 0x00ff00) >>  8);
 372                 saa_writeb(SAA7134_NUM_SAMPLES2, ((dev->dmasound.blksize - 1) & 0xff0000) >> 16);
 373                 saa_writeb(SAA7134_AUDIO_FORMAT_CTRL, fmt);
 374
 375                 break;
 376           case PCI_DEVICE_ID_PHILIPS_SAA7133:
 377           case PCI_DEVICE_ID_PHILIPS_SAA7135:
 378                 if (1 == runtime->channels)
 379                         fmt |= (1 << 4);
 380                 if (2 == runtime->channels)
 381                         fmt |= (2 << 4);
 382                 if (!sign)
 383                         fmt |= 0x04;
 384                 saa_writel(SAA7133_NUM_SAMPLES, dev->dmasound.blksize -1);
 385                 saa_writel(SAA7133_AUDIO_CHANNEL, 0x543210 | (fmt << 24));
 386                 break;
 387         }
 388
 389         dprintk("rec_start: afmt=%d ch=%d  =>  fmt=0x%x swap=%c\n",
 390                 runtime->format, runtime->channels, fmt,
 391                 bswap ? 'b' : '-');
 392         /* dma: setup channel 6 (= AUDIO) */
 393         control = SAA7134_RS_CONTROL_BURST_16 |
 394                 SAA7134_RS_CONTROL_ME |
 395                 (dev->dmasound.pt.dma >> 12);
 396         if (bswap)
 397                 control |= SAA7134_RS_CONTROL_BSWAP;
 398
 399         saa_writel(SAA7134_RS_BA1(6),0);
 400         saa_writel(SAA7134_RS_BA2(6),dev->dmasound.blksize);
 401         saa_writel(SAA7134_RS_PITCH(6),0);
 402         saa_writel(SAA7134_RS_CONTROL(6),control);
 403
 404         dev->dmasound.rate = runtime->rate;
 405
 406         return 0;
 407
 408 }
 409
 410 /*
 411  * ALSA pointer fetching
 412  *
 413  *   - One of the ALSA capture callbacks.
 414  *
 415  *   Called whenever a period elapses, it must return the current hardware
 416  *  position of the buffer.
 417  *   Also resets the read counter used to prevent overruns
 418  *
 419  */
 420
 421 static snd_pcm_uframes_t
 422 snd_card_saa7134_capture_pointer(struct snd_pcm_substream * substream)
 423 {
 424         struct snd_pcm_runtime *runtime = substream->runtime;
 425         snd_card_saa7134_pcm_t *pcm = runtime->private_data;
 426         struct saa7134_dev *dev=pcm->dev;
 427
 428         if (dev->dmasound.read_count) {
 429                 dev->dmasound.read_count  -= snd_pcm_lib_period_bytes(substream);
 430                 dev->dmasound.read_offset += snd_pcm_lib_period_bytes(substream);
 431                 if (dev->dmasound.read_offset == dev->dmasound.bufsize)
 432                         dev->dmasound.read_offset = 0;
 433         }
 434
 435         return bytes_to_frames(runtime, dev->dmasound.read_offset);
 436 }
 437
 438 /*
 439  * ALSA hardware capabilities definition
 440  */
 441
 442 static struct snd_pcm_hardware snd_card_saa7134_capture =
 443 {
 444         .info =                 (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
 445                                  SNDRV_PCM_INFO_BLOCK_TRANSFER |
 446                                  SNDRV_PCM_INFO_MMAP_VALID),
 447         .formats =              SNDRV_PCM_FMTBIT_S16_LE | \
 448                                 SNDRV_PCM_FMTBIT_S16_BE | \
 449                                 SNDRV_PCM_FMTBIT_S8 | \
 450                                 SNDRV_PCM_FMTBIT_U8 | \
 451                                 SNDRV_PCM_FMTBIT_U16_LE | \
 452                                 SNDRV_PCM_FMTBIT_U16_BE,
 453         .rates =                SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_48000,
 454         .rate_min =             32000,
 455         .rate_max =             48000,
 456         .channels_min =         1,
 457         .channels_max =         2,
 458         .buffer_bytes_max =     (256*1024),
 459         .period_bytes_min =     64,
 460         .period_bytes_max =     (256*1024),
 461         .periods_min =          4,
 462         .periods_max =          1024,
 463 };
 464
 465 static void snd_card_saa7134_runtime_free(struct snd_pcm_runtime *runtime)
 466 {
 467         snd_card_saa7134_pcm_t *pcm = runtime->private_data;
 468
 469         kfree(pcm);
 470 }
 471
 472
 473 /*
 474  * ALSA hardware params
 475  *
 476  *   - One of the ALSA capture callbacks.
 477  *
 478  *   Called on initialization, right before the PCM preparation
 479  *
 480  */
 481
 482 static int snd_card_saa7134_hw_params(struct snd_pcm_substream * substream,
 483                                       struct snd_pcm_hw_params * hw_params)
 484 {
 485         snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
 486         struct saa7134_dev *dev;
 487         unsigned int period_size, periods;
 488         int err;
 489
 490         period_size = params_period_bytes(hw_params);
 491         periods = params_periods(hw_params);
 492
 493         snd_assert(period_size >= 0x100 && period_size <= 0x10000,
 494                    return -EINVAL);
 495         snd_assert(periods >= 4, return -EINVAL);
 496         snd_assert(period_size * periods <= 1024 * 1024, return -EINVAL);
 497
 498         dev = saa7134->dev;
 499
 500         if (dev->dmasound.blocks == periods &&
 501             dev->dmasound.blksize == period_size)
 502                 return 0;
 503
 504         /* release the old buffer */
 505         if (substream->runtime->dma_area) {
 506                 saa7134_pgtable_free(dev->pci, &dev->dmasound.pt);
 507                 videobuf_pci_dma_unmap(dev->pci, &dev->dmasound.dma);
 508                 dsp_buffer_free(dev);
 509                 substream->runtime->dma_area = NULL;
 510         }
 511         dev->dmasound.blocks  = periods;
 512         dev->dmasound.blksize = period_size;
 513         dev->dmasound.bufsize = period_size * periods;
 514
 515         err = dsp_buffer_init(dev);
 516         if (0 != err) {
 517                 dev->dmasound.blocks  = 0;
 518                 dev->dmasound.blksize = 0;
 519                 dev->dmasound.bufsize = 0;
 520                 return err;
 521         }
 522
 523         if (0 != (err = videobuf_pci_dma_map(dev->pci, &dev->dmasound.dma))) {
 524                 dsp_buffer_free(dev);
 525                 return err;
 526         }
 527         if (0 != (err = saa7134_pgtable_alloc(dev->pci,&dev->dmasound.pt))) {
 528                 videobuf_pci_dma_unmap(dev->pci, &dev->dmasound.dma);
 529                 dsp_buffer_free(dev);
 530                 return err;
 531         }
 532         if (0 != (err = saa7134_pgtable_build(dev->pci,&dev->dmasound.pt,
 533                                                 dev->dmasound.dma.sglist,
 534                                                 dev->dmasound.dma.sglen,
 535                                                 0))) {
 536                 saa7134_pgtable_free(dev->pci, &dev->dmasound.pt);
 537                 videobuf_pci_dma_unmap(dev->pci, &dev->dmasound.dma);
 538                 dsp_buffer_free(dev);
 539                 return err;
 540         }
 541
 542         /* I should be able to use runtime->dma_addr in the control
 543            byte, but it doesn't work. So I allocate the DMA using the
 544            V4L functions, and force ALSA to use that as the DMA area */
 545
 546         substream->runtime->dma_area = dev->dmasound.dma.vmalloc;
 547         substream->runtime->dma_bytes = dev->dmasound.bufsize;
 548         substream->runtime->dma_addr = 0;
 549
 550         return 0;
 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(struct snd_pcm_substream * 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_pci_dma_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(struct snd_pcm_substream * substream)
 591 {
 592         snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
 593         struct saa7134_dev *dev = saa7134->dev;
 594
 595         if (saa7134->mute_was_on) {
 596                 dev->ctl_mute = 1;
 597                 saa7134_tvaudio_setmute(dev);
 598         }
 599         return 0;
 600 }
 601
 602 /*
 603  * ALSA capture start
 604  *
 605  *   - One of the ALSA capture callbacks.
 606  *
 607  *   Called when opening the device. It creates and populates the PCM
 608  *  structure
 609  *
 610  */
 611
 612 static int snd_card_saa7134_capture_open(struct snd_pcm_substream * substream)
 613 {
 614         struct snd_pcm_runtime *runtime = substream->runtime;
 615         snd_card_saa7134_pcm_t *pcm;
 616         snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
 617         struct saa7134_dev *dev = saa7134->dev;
 618         int amux, err;
 619
 620         mutex_lock(&dev->dmasound.lock);
 621
 622         dev->dmasound.read_count  = 0;
 623         dev->dmasound.read_offset = 0;
 624
 625         amux = dev->input->amux;
 626         if ((amux < 1) || (amux > 3))
 627                 amux = 1;
 628         dev->dmasound.input  =  amux - 1;
 629
 630         mutex_unlock(&dev->dmasound.lock);
 631
 632         pcm = kzalloc(sizeof(*pcm), GFP_KERNEL);
 633         if (pcm == NULL)
 634                 return -ENOMEM;
 635
 636         pcm->dev=saa7134->dev;
 637
 638         spin_lock_init(&pcm->lock);
 639
 640         pcm->substream = substream;
 641         runtime->private_data = pcm;
 642         runtime->private_free = snd_card_saa7134_runtime_free;
 643         runtime->hw = snd_card_saa7134_capture;
 644
 645         if (dev->ctl_mute != 0) {
 646                 saa7134->mute_was_on = 1;
 647                 dev->ctl_mute = 0;
 648                 saa7134_tvaudio_setmute(dev);
 649         }
 650
 651         err = snd_pcm_hw_constraint_integer(runtime,
 652                                                 SNDRV_PCM_HW_PARAM_PERIODS);
 653         if (err < 0)
 654                 return err;
 655
 656         err = snd_pcm_hw_constraint_step(runtime, 0,
 657                                                 SNDRV_PCM_HW_PARAM_PERIODS, 2);
 658         if (err < 0)
 659                 return err;
 660
 661         return 0;
 662 }
 663
 664 /*
 665  * page callback (needed for mmap)
 666  */
 667
 668 static struct page *snd_card_saa7134_page(struct snd_pcm_substream *substream,
 669                                         unsigned long offset)
 670 {
 671         void *pageptr = substream->runtime->dma_area + offset;
 672         return vmalloc_to_page(pageptr);
 673 }
 674
 675 /*
 676  * ALSA capture callbacks definition
 677  */
 678
 679 static struct snd_pcm_ops snd_card_saa7134_capture_ops = {
 680         .open =                 snd_card_saa7134_capture_open,
 681         .close =                snd_card_saa7134_capture_close,
 682         .ioctl =                snd_pcm_lib_ioctl,
 683         .hw_params =            snd_card_saa7134_hw_params,
 684         .hw_free =              snd_card_saa7134_hw_free,
 685         .prepare =              snd_card_saa7134_capture_prepare,
 686         .trigger =              snd_card_saa7134_capture_trigger,
 687         .pointer =              snd_card_saa7134_capture_pointer,
 688         .page =                 snd_card_saa7134_page,
 689 };
 690
 691 /*
 692  * ALSA PCM setup
 693  *
 694  *   Called when initializing the board. Sets up the name and hooks up
 695  *  the callbacks
 696  *
 697  */
 698
 699 static int snd_card_saa7134_pcm(snd_card_saa7134_t *saa7134, int device)
 700 {
 701         struct snd_pcm *pcm;
 702         int err;
 703
 704         if ((err = snd_pcm_new(saa7134->card, "SAA7134 PCM", device, 0, 1, &pcm)) < 0)
 705                 return err;
 706         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_card_saa7134_capture_ops);
 707         pcm->private_data = saa7134;
 708         pcm->info_flags = 0;
 709         strcpy(pcm->name, "SAA7134 PCM");
 710         return 0;
 711 }
 712
 713 #define SAA713x_VOLUME(xname, xindex, addr) \
 714 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
 715   .info = snd_saa7134_volume_info, \
 716   .get = snd_saa7134_volume_get, .put = snd_saa7134_volume_put, \
 717   .private_value = addr }
 718
 719 static int snd_saa7134_volume_info(struct snd_kcontrol * kcontrol,
 720                                    struct snd_ctl_elem_info * uinfo)
 721 {
 722         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 723         uinfo->count = 2;
 724         uinfo->value.integer.min = 0;
 725         uinfo->value.integer.max = 20;
 726         return 0;
 727 }
 728
 729 static int snd_saa7134_volume_get(struct snd_kcontrol * kcontrol,
 730                                   struct snd_ctl_elem_value * ucontrol)
 731 {
 732         snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol);
 733         int addr = kcontrol->private_value;
 734
 735         ucontrol->value.integer.value[0] = chip->mixer_volume[addr][0];
 736         ucontrol->value.integer.value[1] = chip->mixer_volume[addr][1];
 737         return 0;
 738 }
 739
 740 static int snd_saa7134_volume_put(struct snd_kcontrol * kcontrol,
 741                                   struct snd_ctl_elem_value * ucontrol)
 742 {
 743         snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol);
 744         struct saa7134_dev *dev = chip->dev;
 745
 746         int change, addr = kcontrol->private_value;
 747         int left, right;
 748
 749         left = ucontrol->value.integer.value[0];
 750         if (left < 0)
 751                 left = 0;
 752         if (left > 20)
 753                 left = 20;
 754         right = ucontrol->value.integer.value[1];
 755         if (right < 0)
 756                 right = 0;
 757         if (right > 20)
 758                 right = 20;
 759         spin_lock_irq(&chip->mixer_lock);
 760         change = 0;
 761         if (chip->mixer_volume[addr][0] != left) {
 762                 change = 1;
 763                 right = left;
 764         }
 765         if (chip->mixer_volume[addr][1] != right) {
 766                 change = 1;
 767                 left = right;
 768         }
 769         if (change) {
 770                 switch (dev->pci->device) {
 771                         case PCI_DEVICE_ID_PHILIPS_SAA7134:
 772                                 switch (addr) {
 773                                         case MIXER_ADDR_TVTUNER:
 774                                                 left = 20;
 775                                                 break;
 776                                         case MIXER_ADDR_LINE1:
 777                                                 saa_andorb(SAA7134_ANALOG_IO_SELECT,  0x10,
 778                                                            (left > 10) ? 0x00 : 0x10);
 779                                                 break;
 780                                         case MIXER_ADDR_LINE2:
 781                                                 saa_andorb(SAA7134_ANALOG_IO_SELECT,  0x20,
 782                                                            (left > 10) ? 0x00 : 0x20);
 783                                                 break;
 784                                 }
 785                                 break;
 786                         case PCI_DEVICE_ID_PHILIPS_SAA7133:
 787                         case PCI_DEVICE_ID_PHILIPS_SAA7135:
 788                                 switch (addr) {
 789                                         case MIXER_ADDR_TVTUNER:
 790                                                 left = 20;
 791                                                 break;
 792                                         case MIXER_ADDR_LINE1:
 793                                                 saa_andorb(0x0594,  0x10,
 794                                                            (left > 10) ? 0x00 : 0x10);
 795                                                 break;
 796                                         case MIXER_ADDR_LINE2:
 797                                                 saa_andorb(0x0594,  0x20,
 798                                                            (left > 10) ? 0x00 : 0x20);
 799                                                 break;
 800                                 }
 801                                 break;
 802                 }
 803                 chip->mixer_volume[addr][0] = left;
 804                 chip->mixer_volume[addr][1] = right;
 805         }
 806         spin_unlock_irq(&chip->mixer_lock);
 807         return change;
 808 }
 809
 810 #define SAA713x_CAPSRC(xname, xindex, addr) \
 811 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
 812   .info = snd_saa7134_capsrc_info, \
 813   .get = snd_saa7134_capsrc_get, .put = snd_saa7134_capsrc_put, \
 814   .private_value = addr }
 815
 816 static int snd_saa7134_capsrc_info(struct snd_kcontrol * kcontrol,
 817                                    struct snd_ctl_elem_info * uinfo)
 818 {
 819         uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
 820         uinfo->count = 2;
 821         uinfo->value.integer.min = 0;
 822         uinfo->value.integer.max = 1;
 823         return 0;
 824 }
 825
 826 static int snd_saa7134_capsrc_get(struct snd_kcontrol * kcontrol,
 827                                   struct snd_ctl_elem_value * ucontrol)
 828 {
 829         snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol);
 830         int addr = kcontrol->private_value;
 831
 832         spin_lock_irq(&chip->mixer_lock);
 833         ucontrol->value.integer.value[0] = chip->capture_source[addr][0];
 834         ucontrol->value.integer.value[1] = chip->capture_source[addr][1];
 835         spin_unlock_irq(&chip->mixer_lock);
 836
 837         return 0;
 838 }
 839
 840 static int snd_saa7134_capsrc_put(struct snd_kcontrol * kcontrol,
 841                                   struct snd_ctl_elem_value * ucontrol)
 842 {
 843         snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol);
 844         int change, addr = kcontrol->private_value;
 845         int left, right;
 846         u32 anabar, xbarin;
 847         int analog_io, rate;
 848         struct saa7134_dev *dev;
 849
 850         dev = chip->dev;
 851
 852         left = ucontrol->value.integer.value[0] & 1;
 853         right = ucontrol->value.integer.value[1] & 1;
 854         spin_lock_irq(&chip->mixer_lock);
 855
 856         change = chip->capture_source[addr][0] != left ||
 857                  chip->capture_source[addr][1] != right;
 858         chip->capture_source[addr][0] = left;
 859         chip->capture_source[addr][1] = right;
 860         dev->dmasound.input=addr;
 861         spin_unlock_irq(&chip->mixer_lock);
 862
 863
 864         if (change) {
 865           switch (dev->pci->device) {
 866
 867            case PCI_DEVICE_ID_PHILIPS_SAA7134:
 868                 switch (addr) {
 869                         case MIXER_ADDR_TVTUNER:
 870                                 saa_andorb(SAA7134_AUDIO_FORMAT_CTRL, 0xc0, 0xc0);
 871                                 saa_andorb(SAA7134_SIF_SAMPLE_FREQ,   0x03, 0x00);
 872                                 break;
 873                         case MIXER_ADDR_LINE1:
 874                         case MIXER_ADDR_LINE2:
 875                                 analog_io = (MIXER_ADDR_LINE1 == addr) ? 0x00 : 0x08;
 876                                 rate = (32000 == dev->dmasound.rate) ? 0x01 : 0x03;
 877                                 saa_andorb(SAA7134_ANALOG_IO_SELECT,  0x08, analog_io);
 878                                 saa_andorb(SAA7134_AUDIO_FORMAT_CTRL, 0xc0, 0x80);
 879                                 saa_andorb(SAA7134_SIF_SAMPLE_FREQ,   0x03, rate);
 880                                 break;
 881                 }
 882
 883                 break;
 884            case PCI_DEVICE_ID_PHILIPS_SAA7133:
 885            case PCI_DEVICE_ID_PHILIPS_SAA7135:
 886                 xbarin = 0x03; // adc
 887                 anabar = 0;
 888                 switch (addr) {
 889                         case MIXER_ADDR_TVTUNER:
 890                                 xbarin = 0; // Demodulator
 891                                 anabar = 2; // DACs
 892                                 break;
 893                         case MIXER_ADDR_LINE1:
 894                                 anabar = 0;  // aux1, aux1
 895                                 break;
 896                         case MIXER_ADDR_LINE2:
 897                                 anabar = 9;  // aux2, aux2
 898                                 break;
 899                 }
 900
 901                 /* output xbar always main channel */
 902                 saa_dsp_writel(dev, SAA7133_DIGITAL_OUTPUT_SEL1, 0xbbbb10);
 903
 904                 if (left || right) { // We've got data, turn the input on
 905                   saa_dsp_writel(dev, SAA7133_DIGITAL_INPUT_XBAR1, xbarin);
 906                   saa_writel(SAA7133_ANALOG_IO_SELECT, anabar);
 907                 } else {
 908                   saa_dsp_writel(dev, SAA7133_DIGITAL_INPUT_XBAR1, 0);
 909                   saa_writel(SAA7133_ANALOG_IO_SELECT, 0);
 910                 }
 911                 break;
 912           }
 913         }
 914
 915         return change;
 916 }
 917
 918 static struct snd_kcontrol_new snd_saa7134_controls[] = {
 919 SAA713x_VOLUME("Video Volume", 0, MIXER_ADDR_TVTUNER),
 920 SAA713x_CAPSRC("Video Capture Switch", 0, MIXER_ADDR_TVTUNER),
 921 SAA713x_VOLUME("Line Volume", 1, MIXER_ADDR_LINE1),
 922 SAA713x_CAPSRC("Line Capture Switch", 1, MIXER_ADDR_LINE1),
 923 SAA713x_VOLUME("Line Volume", 2, MIXER_ADDR_LINE2),
 924 SAA713x_CAPSRC("Line Capture Switch", 2, MIXER_ADDR_LINE2),
 925 };
 926
 927 /*
 928  * ALSA mixer setup
 929  *
 930  *   Called when initializing the board. Sets up the name and hooks up
 931  *  the callbacks
 932  *
 933  */
 934
 935 static int snd_card_saa7134_new_mixer(snd_card_saa7134_t * chip)
 936 {
 937         struct snd_card *card = chip->card;
 938         unsigned int idx;
 939         int err;
 940
 941         snd_assert(chip != NULL, return -EINVAL);
 942         strcpy(card->mixername, "SAA7134 Mixer");
 943
 944         for (idx = 0; idx < ARRAY_SIZE(snd_saa7134_controls); idx++) {
 945                 if ((err = snd_ctl_add(card, snd_ctl_new1(&snd_saa7134_controls[idx], chip))) < 0)
 946                         return err;
 947         }
 948         return 0;
 949 }
 950
 951 static void snd_saa7134_free(struct snd_card * card)
 952 {
 953         snd_card_saa7134_t *chip = card->private_data;
 954
 955         if (chip->dev->dmasound.priv_data == NULL)
 956                 return;
 957
 958         if (chip->irq >= 0) {
 959                 synchronize_irq(chip->irq);
 960                 free_irq(chip->irq, &chip->dev->dmasound);
 961         }
 962
 963         chip->dev->dmasound.priv_data = NULL;
 964
 965 }
 966
 967 /*
 968  * ALSA initialization
 969  *
 970  *   Called by the init routine, once for each saa7134 device present,
 971  *  it creates the basic structures and registers the ALSA devices
 972  *
 973  */
 974
 975 static int alsa_card_saa7134_create(struct saa7134_dev *dev, int devnum)
 976 {
 977
 978         struct snd_card *card;
 979         snd_card_saa7134_t *chip;
 980         int err;
 981
 982
 983         if (devnum >= SNDRV_CARDS)
 984                 return -ENODEV;
 985         if (!enable[devnum])
 986                 return -ENODEV;
 987
 988         card = snd_card_new(index[devnum], id[devnum], THIS_MODULE, sizeof(snd_card_saa7134_t));
 989
 990         if (card == NULL)
 991                 return -ENOMEM;
 992
 993         strcpy(card->driver, "SAA7134");
 994
 995         /* Card "creation" */
 996
 997         card->private_free = snd_saa7134_free;
 998         chip = (snd_card_saa7134_t *) card->private_data;
 999
1000         spin_lock_init(&chip->lock);
1001         spin_lock_init(&chip->mixer_lock);
1002
1003         chip->dev = dev;
1004
1005         chip->card = card;
1006
1007         chip->pci = dev->pci;
1008         chip->iobase = pci_resource_start(dev->pci, 0);
1009
1010
1011         err = request_irq(dev->pci->irq, saa7134_alsa_irq,
1012                                 IRQF_SHARED | IRQF_DISABLED, dev->name,
1013                                 (void*) &dev->dmasound);
1014
1015         if (err < 0) {
1016                 printk(KERN_ERR "%s: can't get IRQ %d for ALSA\n",
1017                         dev->name, dev->pci->irq);
1018                 goto __nodev;
1019         }
1020
1021         chip->irq = dev->pci->irq;
1022
1023         mutex_init(&dev->dmasound.lock);
1024
1025         if ((err = snd_card_saa7134_new_mixer(chip)) < 0)
1026                 goto __nodev;
1027
1028         if ((err = snd_card_saa7134_pcm(chip, 0)) < 0)
1029                 goto __nodev;
1030
1031         snd_card_set_dev(card, &chip->pci->dev);
1032
1033         /* End of "creation" */
1034
1035         strcpy(card->shortname, "SAA7134");
1036         sprintf(card->longname, "%s at 0x%lx irq %d",
1037                 chip->dev->name, chip->iobase, chip->irq);
1038
1039         printk(KERN_INFO "%s/alsa: %s registered as card %d\n",dev->name,card->longname,index[devnum]);
1040
1041         if ((err = snd_card_register(card)) == 0) {
1042                 snd_saa7134_cards[devnum] = card;
1043                 return 0;
1044         }
1045
1046 __nodev:
1047         snd_card_free(card);
1048         return err;
1049 }
1050
1051
1052 static int alsa_device_init(struct saa7134_dev *dev)
1053 {
1054         dev->dmasound.priv_data = dev;
1055         alsa_card_saa7134_create(dev,dev->nr);
1056         return 1;
1057 }
1058
1059 static int alsa_device_exit(struct saa7134_dev *dev)
1060 {
1061
1062         snd_card_free(snd_saa7134_cards[dev->nr]);
1063         snd_saa7134_cards[dev->nr] = NULL;
1064         return 1;
1065 }
1066
1067 /*
1068  * Module initializer
1069  *
1070  * Loops through present saa7134 cards, and assigns an ALSA device
1071  * to each one
1072  *
1073  */
1074
1075 static int saa7134_alsa_init(void)
1076 {
1077         struct saa7134_dev *dev = NULL;
1078         struct list_head *list;
1079
1080         if (!saa7134_dmasound_init && !saa7134_dmasound_exit) {
1081                 saa7134_dmasound_init = alsa_device_init;
1082                 saa7134_dmasound_exit = alsa_device_exit;
1083         } else {
1084                 printk(KERN_WARNING "saa7134 ALSA: can't load, DMA sound handler already assigned (probably to OSS)\n");
1085                 return -EBUSY;
1086         }
1087
1088         printk(KERN_INFO "saa7134 ALSA driver for DMA sound loaded\n");
1089
1090         list_for_each(list,&saa7134_devlist) {
1091                 dev = list_entry(list, struct saa7134_dev, devlist);
1092                 if (dev->dmasound.priv_data == NULL) {
1093                         alsa_device_init(dev);
1094                 } else {
1095                         printk(KERN_ERR "saa7134 ALSA: DMA sound is being handled by OSS. ignoring %s\n",dev->name);
1096                         return -EBUSY;
1097                 }
1098         }
1099
1100         if (dev == NULL)
1101                 printk(KERN_INFO "saa7134 ALSA: no saa7134 cards found\n");
1102
1103         return 0;
1104
1105 }
1106
1107 /*
1108  * Module destructor
1109  */
1110
1111 static void saa7134_alsa_exit(void)
1112 {
1113         int idx;
1114
1115         for (idx = 0; idx < SNDRV_CARDS; idx++) {
1116                 snd_card_free(snd_saa7134_cards[idx]);
1117         }
1118
1119         saa7134_dmasound_init = NULL;
1120         saa7134_dmasound_exit = NULL;
1121         printk(KERN_INFO "saa7134 ALSA driver for DMA sound unloaded\n");
1122
1123         return;
1124 }
1125
1126 /* We initialize this late, to make sure the sound system is up and running */
1127 late_initcall(saa7134_alsa_init);
1128 module_exit(saa7134_alsa_exit);
1129 MODULE_LICENSE("GPL");
1130 MODULE_AUTHOR("Ricardo Cerqueira");
1131
1132
1133