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/moduleparam.h>
  24 #include <linux/module.h>
  25 #include <sound/driver.h>
  26 #include <sound/core.h>
  27 #include <sound/control.h>
  28 #include <sound/pcm.h>
  29 #include <sound/pcm_params.h>
  30 #include <sound/initval.h>
  31 #include <linux/interrupt.h>
  32
  33 #include "saa7134.h"
  34 #include "saa7134-reg.h"
  35
  36 static unsigned int debug  = 0;
  37 module_param(debug, int, 0644);
  38 MODULE_PARM_DESC(debug,"enable debug messages [alsa]");
  39
  40 /*
  41  * Configuration macros
  42  */
  43
  44 /* defaults */
  45 #define MIXER_ADDR_TVTUNER      0
  46 #define MIXER_ADDR_LINE1        1
  47 #define MIXER_ADDR_LINE2        2
  48 #define MIXER_ADDR_LAST         2
  49
  50
  51 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;      /* Index 0-MAX */
  52 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;       /* ID for this card */
  53 static int enable[SNDRV_CARDS] = {1, [1 ... (SNDRV_CARDS - 1)] = 1};
  54
  55 module_param_array(index, int, NULL, 0444);
  56 module_param_array(enable, int, NULL, 0444);
  57 MODULE_PARM_DESC(index, "Index value for SAA7134 capture interface(s).");
  58 MODULE_PARM_DESC(enable, "Enable (or not) the SAA7134 capture interface(s).");
  59
  60 #define dprintk(fmt, arg...)    if (debug) \
  61         printk(KERN_DEBUG "%s/alsa: " fmt, dev->name , ##arg)
  62
  63
  64
  65 /*
  66  * Main chip structure
  67  */
  68
  69 typedef struct snd_card_saa7134 {
  70         struct snd_card *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         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,report);
 226                         saa7134_irq_alsa_done(dev, status);
 227                 } else {
 228                         goto out;
 229                 }
 230         }
 231
 232         if (loop == 10) {
 233                 dprintk("error! looping IRQ!");
 234         }
 235
 236 out:
 237         return IRQ_RETVAL(handled);
 238 }
 239
 240 /*
 241  * ALSA capture trigger
 242  *
 243  *   - One of the ALSA capture callbacks.
 244  *
 245  *   Called whenever a capture is started or stopped. Must be defined,
 246  *   but there's nothing we want to do here
 247  *
 248  */
 249
 250 static int snd_card_saa7134_capture_trigger(struct snd_pcm_substream * substream,
 251                                           int cmd)
 252 {
 253         struct snd_pcm_runtime *runtime = substream->runtime;
 254         snd_card_saa7134_pcm_t *pcm = runtime->private_data;
 255         struct saa7134_dev *dev=pcm->dev;
 256         int err = 0;
 257
 258         spin_lock(&dev->slock);
 259         if (cmd == SNDRV_PCM_TRIGGER_START) {
 260                 /* start dma */
 261                 saa7134_dma_start(dev);
 262         } else if (cmd == SNDRV_PCM_TRIGGER_STOP) {
 263                 /* stop dma */
 264                 saa7134_dma_stop(dev);
 265         } else {
 266                 err = -EINVAL;
 267         }
 268         spin_unlock(&dev->slock);
 269
 270         return err;
 271 }
 272
 273 /*
 274  * DMA buffer initialization
 275  *
 276  *   Uses V4L functions to initialize the DMA. Shouldn't be necessary in
 277  *  ALSA, but I was unable to use ALSA's own DMA, and had to force the
 278  *  usage of V4L's
 279  *
 280  *   - Copied verbatim from saa7134-oss.
 281  *
 282  */
 283
 284 static int dsp_buffer_init(struct saa7134_dev *dev)
 285 {
 286         int err;
 287
 288         BUG_ON(!dev->dmasound.bufsize);
 289
 290         videobuf_dma_init(&dev->dmasound.dma);
 291         err = videobuf_dma_init_kernel(&dev->dmasound.dma, PCI_DMA_FROMDEVICE,
 292                                        (dev->dmasound.bufsize + PAGE_SIZE) >> PAGE_SHIFT);
 293         if (0 != err)
 294                 return err;
 295         return 0;
 296 }
 297
 298 /*
 299  * DMA buffer release
 300  *
 301  *   Called after closing the device, during snd_card_saa7134_capture_close
 302  *
 303  */
 304
 305 static int dsp_buffer_free(struct saa7134_dev *dev)
 306 {
 307         BUG_ON(!dev->dmasound.blksize);
 308
 309         videobuf_dma_free(&dev->dmasound.dma);
 310
 311         dev->dmasound.blocks  = 0;
 312         dev->dmasound.blksize = 0;
 313         dev->dmasound.bufsize = 0;
 314
 315        return 0;
 316 }
 317
 318
 319 /*
 320  * ALSA PCM preparation
 321  *
 322  *   - One of the ALSA capture callbacks.
 323  *
 324  *   Called right after the capture device is opened, this function configures
 325  *  the buffer using the previously defined functions, allocates the memory,
 326  *  sets up the hardware registers, and then starts the DMA. When this function
 327  *  returns, the audio should be flowing.
 328  *
 329  */
 330
 331 static int snd_card_saa7134_capture_prepare(struct snd_pcm_substream * substream)
 332 {
 333         struct snd_pcm_runtime *runtime = substream->runtime;
 334         int bswap, sign;
 335         u32 fmt, control;
 336         snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
 337         struct saa7134_dev *dev;
 338         snd_card_saa7134_pcm_t *pcm = runtime->private_data;
 339
 340         pcm->dev->dmasound.substream = substream;
 341
 342         dev = saa7134->dev;
 343
 344         if (snd_pcm_format_width(runtime->format) == 8)
 345                 fmt = 0x00;
 346         else
 347                 fmt = 0x01;
 348
 349         if (snd_pcm_format_signed(runtime->format))
 350                 sign = 1;
 351         else
 352                 sign = 0;
 353
 354         if (snd_pcm_format_big_endian(runtime->format))
 355                 bswap = 1;
 356         else
 357                 bswap = 0;
 358
 359         switch (dev->pci->device) {
 360           case PCI_DEVICE_ID_PHILIPS_SAA7134:
 361                 if (1 == runtime->channels)
 362                         fmt |= (1 << 3);
 363                 if (2 == runtime->channels)
 364                         fmt |= (3 << 3);
 365                 if (sign)
 366                         fmt |= 0x04;
 367
 368                 fmt |= (MIXER_ADDR_TVTUNER == dev->dmasound.input) ? 0xc0 : 0x80;
 369                 saa_writeb(SAA7134_NUM_SAMPLES0, ((dev->dmasound.blksize - 1) & 0x0000ff));
 370                 saa_writeb(SAA7134_NUM_SAMPLES1, ((dev->dmasound.blksize - 1) & 0x00ff00) >>  8);
 371                 saa_writeb(SAA7134_NUM_SAMPLES2, ((dev->dmasound.blksize - 1) & 0xff0000) >> 16);
 372                 saa_writeb(SAA7134_AUDIO_FORMAT_CTRL, fmt);
 373
 374                 break;
 375           case PCI_DEVICE_ID_PHILIPS_SAA7133:
 376           case PCI_DEVICE_ID_PHILIPS_SAA7135:
 377                 if (1 == runtime->channels)
 378                         fmt |= (1 << 4);
 379                 if (2 == runtime->channels)
 380                         fmt |= (2 << 4);
 381                 if (!sign)
 382                         fmt |= 0x04;
 383                 saa_writel(SAA7133_NUM_SAMPLES, dev->dmasound.blksize -1);
 384                 saa_writel(SAA7133_AUDIO_CHANNEL, 0x543210 | (fmt << 24));
 385                 break;
 386         }
 387
 388         dprintk("rec_start: afmt=%d ch=%d  =>  fmt=0x%x swap=%c\n",
 389                 runtime->format, runtime->channels, fmt,
 390                 bswap ? 'b' : '-');
 391         /* dma: setup channel 6 (= AUDIO) */
 392         control = SAA7134_RS_CONTROL_BURST_16 |
 393                 SAA7134_RS_CONTROL_ME |
 394                 (dev->dmasound.pt.dma >> 12);
 395         if (bswap)
 396                 control |= SAA7134_RS_CONTROL_BSWAP;
 397
 398         saa_writel(SAA7134_RS_BA1(6),0);
 399         saa_writel(SAA7134_RS_BA2(6),dev->dmasound.blksize);
 400         saa_writel(SAA7134_RS_PITCH(6),0);
 401         saa_writel(SAA7134_RS_CONTROL(6),control);
 402
 403         dev->dmasound.rate = runtime->rate;
 404
 405         return 0;
 406
 407 }
 408
 409 /*
 410  * ALSA pointer fetching
 411  *
 412  *   - One of the ALSA capture callbacks.
 413  *
 414  *   Called whenever a period elapses, it must return the current hardware
 415  *  position of the buffer.
 416  *   Also resets the read counter used to prevent overruns
 417  *
 418  */
 419
 420 static snd_pcm_uframes_t
 421 snd_card_saa7134_capture_pointer(struct snd_pcm_substream * substream)
 422 {
 423         struct snd_pcm_runtime *runtime = substream->runtime;
 424         snd_card_saa7134_pcm_t *pcm = runtime->private_data;
 425         struct saa7134_dev *dev=pcm->dev;
 426
 427         if (dev->dmasound.read_count) {
 428                 dev->dmasound.read_count  -= snd_pcm_lib_period_bytes(substream);
 429                 dev->dmasound.read_offset += snd_pcm_lib_period_bytes(substream);
 430                 if (dev->dmasound.read_offset == dev->dmasound.bufsize)
 431                         dev->dmasound.read_offset = 0;
 432         }
 433
 434         return bytes_to_frames(runtime, dev->dmasound.read_offset);
 435 }
 436
 437 /*
 438  * ALSA hardware capabilities definition
 439  */
 440
 441 static struct snd_pcm_hardware snd_card_saa7134_capture =
 442 {
 443         .info =                 (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
 444                                  SNDRV_PCM_INFO_BLOCK_TRANSFER |
 445                                  SNDRV_PCM_INFO_MMAP_VALID),
 446         .formats =              SNDRV_PCM_FMTBIT_S16_LE | \
 447                                 SNDRV_PCM_FMTBIT_S16_BE | \
 448                                 SNDRV_PCM_FMTBIT_S8 | \
 449                                 SNDRV_PCM_FMTBIT_U8 | \
 450                                 SNDRV_PCM_FMTBIT_U16_LE | \
 451                                 SNDRV_PCM_FMTBIT_U16_BE,
 452         .rates =                SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_48000,
 453         .rate_min =             32000,
 454         .rate_max =             48000,
 455         .channels_min =         1,
 456         .channels_max =         2,
 457         .buffer_bytes_max =     (256*1024),
 458         .period_bytes_min =     64,
 459         .period_bytes_max =     (256*1024),
 460         .periods_min =          2,
 461         .periods_max =          1024,
 462 };
 463
 464 static void snd_card_saa7134_runtime_free(struct snd_pcm_runtime *runtime)
 465 {
 466         snd_card_saa7134_pcm_t *pcm = runtime->private_data;
 467
 468         kfree(pcm);
 469 }
 470
 471
 472 /*
 473  * ALSA hardware params
 474  *
 475  *   - One of the ALSA capture callbacks.
 476  *
 477  *   Called on initialization, right before the PCM preparation
 478  *
 479  */
 480
 481 static int snd_card_saa7134_hw_params(struct snd_pcm_substream * substream,
 482                                       struct snd_pcm_hw_params * hw_params)
 483 {
 484         snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
 485         struct saa7134_dev *dev;
 486         unsigned int period_size, periods;
 487         int err;
 488
 489         period_size = params_period_bytes(hw_params);
 490         periods = params_periods(hw_params);
 491
 492         snd_assert(period_size >= 0x100 && period_size <= 0x10000,
 493                    return -EINVAL);
 494         snd_assert(periods >= 2, return -EINVAL);
 495         snd_assert(period_size * periods <= 1024 * 1024, return -EINVAL);
 496
 497         dev = saa7134->dev;
 498
 499         if (dev->dmasound.blocks == periods &&
 500             dev->dmasound.blksize == period_size)
 501                 return 0;
 502
 503         /* release the old buffer */
 504         if (substream->runtime->dma_area) {
 505                 saa7134_pgtable_free(dev->pci, &dev->dmasound.pt);
 506                 videobuf_pci_dma_unmap(dev->pci, &dev->dmasound.dma);
 507                 dsp_buffer_free(dev);
 508                 substream->runtime->dma_area = NULL;
 509         }
 510         dev->dmasound.blocks  = periods;
 511         dev->dmasound.blksize = period_size;
 512         dev->dmasound.bufsize = period_size * periods;
 513
 514         err = dsp_buffer_init(dev);
 515         if (0 != err) {
 516                 dev->dmasound.blocks  = 0;
 517                 dev->dmasound.blksize = 0;
 518                 dev->dmasound.bufsize = 0;
 519                 return err;
 520         }
 521
 522         if (0 != (err = videobuf_pci_dma_map(dev->pci, &dev->dmasound.dma))) {
 523                 dsp_buffer_free(dev);
 524                 return err;
 525         }
 526         if (0 != (err = saa7134_pgtable_alloc(dev->pci,&dev->dmasound.pt))) {
 527                 videobuf_pci_dma_unmap(dev->pci, &dev->dmasound.dma);
 528                 dsp_buffer_free(dev);
 529                 return err;
 530         }
 531         if (0 != (err = saa7134_pgtable_build(dev->pci,&dev->dmasound.pt,
 532                                                 dev->dmasound.dma.sglist,
 533                                                 dev->dmasound.dma.sglen,
 534                                                 0))) {
 535                 saa7134_pgtable_free(dev->pci, &dev->dmasound.pt);
 536                 videobuf_pci_dma_unmap(dev->pci, &dev->dmasound.dma);
 537                 dsp_buffer_free(dev);
 538                 return err;
 539         }
 540
 541         /* I should be able to use runtime->dma_addr in the control
 542            byte, but it doesn't work. So I allocate the DMA using the
 543            V4L functions, and force ALSA to use that as the DMA area */
 544
 545         substream->runtime->dma_area = dev->dmasound.dma.vmalloc;
 546
 547         return 1;
 548
 549 }
 550
 551 /*
 552  * ALSA hardware release
 553  *
 554  *   - One of the ALSA capture callbacks.
 555  *
 556  *   Called after closing the device, but before snd_card_saa7134_capture_close
 557  *   It stops the DMA audio and releases the buffers.
 558  *
 559  */
 560
 561 static int snd_card_saa7134_hw_free(struct snd_pcm_substream * substream)
 562 {
 563         snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
 564         struct saa7134_dev *dev;
 565
 566         dev = saa7134->dev;
 567
 568         if (substream->runtime->dma_area) {
 569                 saa7134_pgtable_free(dev->pci, &dev->dmasound.pt);
 570                 videobuf_pci_dma_unmap(dev->pci, &dev->dmasound.dma);
 571                 dsp_buffer_free(dev);
 572                 substream->runtime->dma_area = NULL;
 573         }
 574
 575         return 0;
 576 }
 577
 578 /*
 579  * ALSA capture finish
 580  *
 581  *   - One of the ALSA capture callbacks.
 582  *
 583  *   Called after closing the device.
 584  *
 585  */
 586
 587 static int snd_card_saa7134_capture_close(struct snd_pcm_substream * substream)
 588 {
 589         snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
 590         struct saa7134_dev *dev = saa7134->dev;
 591
 592         dev->ctl_mute = 1;
 593         saa7134_tvaudio_setmute(dev);
 594         return 0;
 595 }
 596
 597 /*
 598  * ALSA capture start
 599  *
 600  *   - One of the ALSA capture callbacks.
 601  *
 602  *   Called when opening the device. It creates and populates the PCM
 603  *  structure
 604  *
 605  */
 606
 607 static int snd_card_saa7134_capture_open(struct snd_pcm_substream * substream)
 608 {
 609         struct snd_pcm_runtime *runtime = substream->runtime;
 610         snd_card_saa7134_pcm_t *pcm;
 611         snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
 612         struct saa7134_dev *dev = saa7134->dev;
 613         int amux, err;
 614
 615         mutex_lock(&dev->dmasound.lock);
 616
 617         dev->dmasound.read_count  = 0;
 618         dev->dmasound.read_offset = 0;
 619
 620         amux = dev->input->amux;
 621         if ((amux < 1) || (amux > 3))
 622                 amux = 1;
 623         dev->dmasound.input  =  amux - 1;
 624
 625         mutex_unlock(&dev->dmasound.lock);
 626
 627         pcm = kzalloc(sizeof(*pcm), GFP_KERNEL);
 628         if (pcm == NULL)
 629                 return -ENOMEM;
 630
 631         pcm->dev=saa7134->dev;
 632
 633         spin_lock_init(&pcm->lock);
 634
 635         pcm->substream = substream;
 636         runtime->private_data = pcm;
 637         runtime->private_free = snd_card_saa7134_runtime_free;
 638         runtime->hw = snd_card_saa7134_capture;
 639
 640         dev->ctl_mute = 0;
 641         saa7134_tvaudio_setmute(dev);
 642
 643         if ((err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
 644                 return err;
 645
 646         return 0;
 647 }
 648
 649 /*
 650  * ALSA capture callbacks definition
 651  */
 652
 653 static struct snd_pcm_ops snd_card_saa7134_capture_ops = {
 654         .open =                 snd_card_saa7134_capture_open,
 655         .close =                snd_card_saa7134_capture_close,
 656         .ioctl =                snd_pcm_lib_ioctl,
 657         .hw_params =            snd_card_saa7134_hw_params,
 658         .hw_free =              snd_card_saa7134_hw_free,
 659         .prepare =              snd_card_saa7134_capture_prepare,
 660         .trigger =              snd_card_saa7134_capture_trigger,
 661         .pointer =              snd_card_saa7134_capture_pointer,
 662 };
 663
 664 /*
 665  * ALSA PCM setup
 666  *
 667  *   Called when initializing the board. Sets up the name and hooks up
 668  *  the callbacks
 669  *
 670  */
 671
 672 static int snd_card_saa7134_pcm(snd_card_saa7134_t *saa7134, int device)
 673 {
 674         struct snd_pcm *pcm;
 675         int err;
 676
 677         if ((err = snd_pcm_new(saa7134->card, "SAA7134 PCM", device, 0, 1, &pcm)) < 0)
 678                 return err;
 679         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_card_saa7134_capture_ops);
 680         pcm->private_data = saa7134;
 681         pcm->info_flags = 0;
 682         strcpy(pcm->name, "SAA7134 PCM");
 683         return 0;
 684 }
 685
 686 #define SAA713x_VOLUME(xname, xindex, addr) \
 687 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
 688   .info = snd_saa7134_volume_info, \
 689   .get = snd_saa7134_volume_get, .put = snd_saa7134_volume_put, \
 690   .private_value = addr }
 691
 692 static int snd_saa7134_volume_info(struct snd_kcontrol * kcontrol,
 693                                    struct snd_ctl_elem_info * uinfo)
 694 {
 695         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 696         uinfo->count = 2;
 697         uinfo->value.integer.min = 0;
 698         uinfo->value.integer.max = 20;
 699         return 0;
 700 }
 701
 702 static int snd_saa7134_volume_get(struct snd_kcontrol * kcontrol,
 703                                   struct snd_ctl_elem_value * ucontrol)
 704 {
 705         snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol);
 706         int addr = kcontrol->private_value;
 707
 708         ucontrol->value.integer.value[0] = chip->mixer_volume[addr][0];
 709         ucontrol->value.integer.value[1] = chip->mixer_volume[addr][1];
 710         return 0;
 711 }
 712
 713 static int snd_saa7134_volume_put(struct snd_kcontrol * kcontrol,
 714                                   struct snd_ctl_elem_value * ucontrol)
 715 {
 716         snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol);
 717         struct saa7134_dev *dev = chip->dev;
 718
 719         int change, addr = kcontrol->private_value;
 720         int left, right;
 721
 722         left = ucontrol->value.integer.value[0];
 723         if (left < 0)
 724                 left = 0;
 725         if (left > 20)
 726                 left = 20;
 727         right = ucontrol->value.integer.value[1];
 728         if (right < 0)
 729                 right = 0;
 730         if (right > 20)
 731                 right = 20;
 732         spin_lock_irq(&chip->mixer_lock);
 733         change = 0;
 734         if (chip->mixer_volume[addr][0] != left) {
 735                 change = 1;
 736                 right = left;
 737         }
 738         if (chip->mixer_volume[addr][1] != right) {
 739                 change = 1;
 740                 left = right;
 741         }
 742         if (change) {
 743                 switch (dev->pci->device) {
 744                         case PCI_DEVICE_ID_PHILIPS_SAA7134:
 745                                 switch (addr) {
 746                                         case MIXER_ADDR_TVTUNER:
 747                                                 left = 20;
 748                                                 break;
 749                                         case MIXER_ADDR_LINE1:
 750                                                 saa_andorb(SAA7134_ANALOG_IO_SELECT,  0x10,
 751                                                            (left > 10) ? 0x00 : 0x10);
 752                                                 break;
 753                                         case MIXER_ADDR_LINE2:
 754                                                 saa_andorb(SAA7134_ANALOG_IO_SELECT,  0x20,
 755                                                            (left > 10) ? 0x00 : 0x20);
 756                                                 break;
 757                                 }
 758                                 break;
 759                         case PCI_DEVICE_ID_PHILIPS_SAA7133:
 760                         case PCI_DEVICE_ID_PHILIPS_SAA7135:
 761                                 switch (addr) {
 762                                         case MIXER_ADDR_TVTUNER:
 763                                                 left = 20;
 764                                                 break;
 765                                         case MIXER_ADDR_LINE1:
 766                                                 saa_andorb(0x0594,  0x10,
 767                                                            (left > 10) ? 0x00 : 0x10);
 768                                                 break;
 769                                         case MIXER_ADDR_LINE2:
 770                                                 saa_andorb(0x0594,  0x20,
 771                                                            (left > 10) ? 0x00 : 0x20);
 772                                                 break;
 773                                 }
 774                                 break;
 775                 }
 776                 chip->mixer_volume[addr][0] = left;
 777                 chip->mixer_volume[addr][1] = right;
 778         }
 779         spin_unlock_irq(&chip->mixer_lock);
 780         return change;
 781 }
 782
 783 #define SAA713x_CAPSRC(xname, xindex, addr) \
 784 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
 785   .info = snd_saa7134_capsrc_info, \
 786   .get = snd_saa7134_capsrc_get, .put = snd_saa7134_capsrc_put, \
 787   .private_value = addr }
 788
 789 static int snd_saa7134_capsrc_info(struct snd_kcontrol * kcontrol,
 790                                    struct snd_ctl_elem_info * uinfo)
 791 {
 792         uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
 793         uinfo->count = 2;
 794         uinfo->value.integer.min = 0;
 795         uinfo->value.integer.max = 1;
 796         return 0;
 797 }
 798
 799 static int snd_saa7134_capsrc_get(struct snd_kcontrol * kcontrol,
 800                                   struct snd_ctl_elem_value * ucontrol)
 801 {
 802         snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol);
 803         int addr = kcontrol->private_value;
 804
 805         spin_lock_irq(&chip->mixer_lock);
 806         ucontrol->value.integer.value[0] = chip->capture_source[addr][0];
 807         ucontrol->value.integer.value[1] = chip->capture_source[addr][1];
 808         spin_unlock_irq(&chip->mixer_lock);
 809
 810         return 0;
 811 }
 812
 813 static int snd_saa7134_capsrc_put(struct snd_kcontrol * kcontrol,
 814                                   struct snd_ctl_elem_value * ucontrol)
 815 {
 816         snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol);
 817         int change, addr = kcontrol->private_value;
 818         int left, right;
 819         u32 anabar, xbarin;
 820         int analog_io, rate;
 821         struct saa7134_dev *dev;
 822
 823         dev = chip->dev;
 824
 825         left = ucontrol->value.integer.value[0] & 1;
 826         right = ucontrol->value.integer.value[1] & 1;
 827         spin_lock_irq(&chip->mixer_lock);
 828
 829         change = chip->capture_source[addr][0] != left ||
 830                  chip->capture_source[addr][1] != right;
 831         chip->capture_source[addr][0] = left;
 832         chip->capture_source[addr][1] = right;
 833         dev->dmasound.input=addr;
 834         spin_unlock_irq(&chip->mixer_lock);
 835
 836
 837         if (change) {
 838           switch (dev->pci->device) {
 839
 840            case PCI_DEVICE_ID_PHILIPS_SAA7134:
 841                 switch (addr) {
 842                         case MIXER_ADDR_TVTUNER:
 843                                 saa_andorb(SAA7134_AUDIO_FORMAT_CTRL, 0xc0, 0xc0);
 844                                 saa_andorb(SAA7134_SIF_SAMPLE_FREQ,   0x03, 0x00);
 845                                 break;
 846                         case MIXER_ADDR_LINE1:
 847                         case MIXER_ADDR_LINE2:
 848                                 analog_io = (MIXER_ADDR_LINE1 == addr) ? 0x00 : 0x08;
 849                                 rate = (32000 == dev->dmasound.rate) ? 0x01 : 0x03;
 850                                 saa_andorb(SAA7134_ANALOG_IO_SELECT,  0x08, analog_io);
 851                                 saa_andorb(SAA7134_AUDIO_FORMAT_CTRL, 0xc0, 0x80);
 852                                 saa_andorb(SAA7134_SIF_SAMPLE_FREQ,   0x03, rate);
 853                                 break;
 854                 }
 855
 856                 break;
 857            case PCI_DEVICE_ID_PHILIPS_SAA7133:
 858            case PCI_DEVICE_ID_PHILIPS_SAA7135:
 859                 xbarin = 0x03; // adc
 860                 anabar = 0;
 861                 switch (addr) {
 862                         case MIXER_ADDR_TVTUNER:
 863                                 xbarin = 0; // Demodulator
 864                                 anabar = 2; // DACs
 865                                 break;
 866                         case MIXER_ADDR_LINE1:
 867                                 anabar = 0;  // aux1, aux1
 868                                 break;
 869                         case MIXER_ADDR_LINE2:
 870                                 anabar = 9;  // aux2, aux2
 871                                 break;
 872                 }
 873
 874                 /* output xbar always main channel */
 875                 saa_dsp_writel(dev, SAA7133_DIGITAL_OUTPUT_SEL1, 0xbbbb10);
 876
 877                 if (left || right) { // We've got data, turn the input on
 878                   saa_dsp_writel(dev, SAA7133_DIGITAL_INPUT_XBAR1, xbarin);
 879                   saa_writel(SAA7133_ANALOG_IO_SELECT, anabar);
 880                 } else {
 881                   saa_dsp_writel(dev, SAA7133_DIGITAL_INPUT_XBAR1, 0);
 882                   saa_writel(SAA7133_ANALOG_IO_SELECT, 0);
 883                 }
 884                 break;
 885           }
 886         }
 887
 888         return change;
 889 }
 890
 891 static struct snd_kcontrol_new snd_saa7134_controls[] = {
 892 SAA713x_VOLUME("Video Volume", 0, MIXER_ADDR_TVTUNER),
 893 SAA713x_CAPSRC("Video Capture Switch", 0, MIXER_ADDR_TVTUNER),
 894 SAA713x_VOLUME("Line Volume", 1, MIXER_ADDR_LINE1),
 895 SAA713x_CAPSRC("Line Capture Switch", 1, MIXER_ADDR_LINE1),
 896 SAA713x_VOLUME("Line Volume", 2, MIXER_ADDR_LINE2),
 897 SAA713x_CAPSRC("Line Capture Switch", 2, MIXER_ADDR_LINE2),
 898 };
 899
 900 /*
 901  * ALSA mixer setup
 902  *
 903  *   Called when initializing the board. Sets up the name and hooks up
 904  *  the callbacks
 905  *
 906  */
 907
 908 static int snd_card_saa7134_new_mixer(snd_card_saa7134_t * chip)
 909 {
 910         struct snd_card *card = chip->card;
 911         unsigned int idx;
 912         int err;
 913
 914         snd_assert(chip != NULL, return -EINVAL);
 915         strcpy(card->mixername, "SAA7134 Mixer");
 916
 917         for (idx = 0; idx < ARRAY_SIZE(snd_saa7134_controls); idx++) {
 918                 if ((err = snd_ctl_add(card, snd_ctl_new1(&snd_saa7134_controls[idx], chip))) < 0)
 919                         return err;
 920         }
 921         return 0;
 922 }
 923
 924 static void snd_saa7134_free(struct snd_card * card)
 925 {
 926         snd_card_saa7134_t *chip = card->private_data;
 927
 928         if (chip->dev->dmasound.priv_data == NULL)
 929                 return;
 930
 931         if (chip->irq >= 0) {
 932                 synchronize_irq(chip->irq);
 933                 free_irq(chip->irq, &chip->dev->dmasound);
 934         }
 935
 936         chip->dev->dmasound.priv_data = NULL;
 937
 938 }
 939
 940 /*
 941  * ALSA initialization
 942  *
 943  *   Called by the init routine, once for each saa7134 device present,
 944  *  it creates the basic structures and registers the ALSA devices
 945  *
 946  */
 947
 948 static int alsa_card_saa7134_create(struct saa7134_dev *dev, int devnum)
 949 {
 950
 951         struct snd_card *card;
 952         snd_card_saa7134_t *chip;
 953         int err;
 954
 955
 956         if (devnum >= SNDRV_CARDS)
 957                 return -ENODEV;
 958         if (!enable[devnum])
 959                 return -ENODEV;
 960
 961         card = snd_card_new(index[devnum], id[devnum], THIS_MODULE, sizeof(snd_card_saa7134_t));
 962
 963         if (card == NULL)
 964                 return -ENOMEM;
 965
 966         strcpy(card->driver, "SAA7134");
 967
 968         /* Card "creation" */
 969
 970         card->private_free = snd_saa7134_free;
 971         chip = (snd_card_saa7134_t *) card->private_data;
 972
 973         spin_lock_init(&chip->lock);
 974         spin_lock_init(&chip->mixer_lock);
 975
 976         chip->dev = dev;
 977
 978         chip->card = card;
 979
 980         chip->pci = dev->pci;
 981         chip->iobase = pci_resource_start(dev->pci, 0);
 982
 983
 984         err = request_irq(dev->pci->irq, saa7134_alsa_irq,
 985                                 IRQF_SHARED | IRQF_DISABLED, dev->name,
 986                                 (void*) &dev->dmasound);
 987
 988         if (err < 0) {
 989                 printk(KERN_ERR "%s: can't get IRQ %d for ALSA\n",
 990                         dev->name, dev->pci->irq);
 991                 goto __nodev;
 992         }
 993
 994         chip->irq = dev->pci->irq;
 995
 996         mutex_init(&dev->dmasound.lock);
 997
 998         if ((err = snd_card_saa7134_new_mixer(chip)) < 0)
 999                 goto __nodev;
1000
1001         if ((err = snd_card_saa7134_pcm(chip, 0)) < 0)
1002                 goto __nodev;
1003
1004         snd_card_set_dev(card, &chip->pci->dev);
1005
1006         /* End of "creation" */
1007
1008         strcpy(card->shortname, "SAA7134");
1009         sprintf(card->longname, "%s at 0x%lx irq %d",
1010                 chip->dev->name, chip->iobase, chip->irq);
1011
1012         printk(KERN_INFO "%s/alsa: %s registered as card %d\n",dev->name,card->longname,index[devnum]);
1013
1014         if ((err = snd_card_register(card)) == 0) {
1015                 snd_saa7134_cards[devnum] = card;
1016                 return 0;
1017         }
1018
1019 __nodev:
1020         snd_card_free(card);
1021         return err;
1022 }
1023
1024
1025 static int alsa_device_init(struct saa7134_dev *dev)
1026 {
1027         dev->dmasound.priv_data = dev;
1028         alsa_card_saa7134_create(dev,dev->nr);
1029         return 1;
1030 }
1031
1032 static int alsa_device_exit(struct saa7134_dev *dev)
1033 {
1034
1035         snd_card_free(snd_saa7134_cards[dev->nr]);
1036         snd_saa7134_cards[dev->nr] = NULL;
1037         return 1;
1038 }
1039
1040 /*
1041  * Module initializer
1042  *
1043  * Loops through present saa7134 cards, and assigns an ALSA device
1044  * to each one
1045  *
1046  */
1047
1048 static int saa7134_alsa_init(void)
1049 {
1050         struct saa7134_dev *dev = NULL;
1051         struct list_head *list;
1052
1053         if (!saa7134_dmasound_init && !saa7134_dmasound_exit) {
1054                 saa7134_dmasound_init = alsa_device_init;
1055                 saa7134_dmasound_exit = alsa_device_exit;
1056         } else {
1057                 printk(KERN_WARNING "saa7134 ALSA: can't load, DMA sound handler already assigned (probably to OSS)\n");
1058                 return -EBUSY;
1059         }
1060
1061         printk(KERN_INFO "saa7134 ALSA driver for DMA sound loaded\n");
1062
1063         list_for_each(list,&saa7134_devlist) {
1064                 dev = list_entry(list, struct saa7134_dev, devlist);
1065                 if (dev->dmasound.priv_data == NULL) {
1066                         alsa_device_init(dev);
1067                 } else {
1068                         printk(KERN_ERR "saa7134 ALSA: DMA sound is being handled by OSS. ignoring %s\n",dev->name);
1069                         return -EBUSY;
1070                 }
1071         }
1072
1073         if (dev == NULL)
1074                 printk(KERN_INFO "saa7134 ALSA: no saa7134 cards found\n");
1075
1076         return 0;
1077
1078 }
1079
1080 /*
1081  * Module destructor
1082  */
1083
1084 static void saa7134_alsa_exit(void)
1085 {
1086         int idx;
1087
1088         for (idx = 0; idx < SNDRV_CARDS; idx++) {
1089                 snd_card_free(snd_saa7134_cards[idx]);
1090         }
1091
1092         saa7134_dmasound_init = NULL;
1093         saa7134_dmasound_exit = NULL;
1094         printk(KERN_INFO "saa7134 ALSA driver for DMA sound unloaded\n");
1095
1096         return;
1097 }
1098
1099 /* We initialize this late, to make sure the sound system is up and running */
1100 late_initcall(saa7134_alsa_init);
1101 module_exit(saa7134_alsa_exit);
1102 MODULE_LICENSE("GPL");
1103 MODULE_AUTHOR("Ricardo Cerqueira");
1104
1105
1106