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         if (!dev->dmasound.blksize)
 312                 BUG();
 313
 314         videobuf_dma_free(&dev->dmasound.dma);
 315
 316         dev->dmasound.blocks  = 0;
 317         dev->dmasound.blksize = 0;
 318         dev->dmasound.bufsize = 0;
 319
 320        return 0;
 321 }
 322
 323
 324 /*
 325  * ALSA PCM preparation
 326  *
 327  *   - One of the ALSA capture callbacks.
 328  *
 329  *   Called right after the capture device is opened, this function configures
 330  *  the buffer using the previously defined functions, allocates the memory,
 331  *  sets up the hardware registers, and then starts the DMA. When this function
 332  *  returns, the audio should be flowing.
 333  *
 334  */
 335
 336 static int snd_card_saa7134_capture_prepare(snd_pcm_substream_t * substream)
 337 {
 338         snd_pcm_runtime_t *runtime = substream->runtime;
 339         int bswap, sign;
 340         u32 fmt, control;
 341         snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
 342         struct saa7134_dev *dev;
 343         snd_card_saa7134_pcm_t *pcm = runtime->private_data;
 344
 345         pcm->dev->dmasound.substream = substream;
 346
 347         dev = saa7134->dev;
 348
 349         if (snd_pcm_format_width(runtime->format) == 8)
 350                 fmt = 0x00;
 351         else
 352                 fmt = 0x01;
 353
 354         if (snd_pcm_format_signed(runtime->format))
 355                 sign = 1;
 356         else
 357                 sign = 0;
 358
 359         if (snd_pcm_format_big_endian(runtime->format))
 360                 bswap = 1;
 361         else
 362                 bswap = 0;
 363
 364         switch (dev->pci->device) {
 365           case PCI_DEVICE_ID_PHILIPS_SAA7134:
 366                 if (1 == runtime->channels)
 367                         fmt |= (1 << 3);
 368                 if (2 == runtime->channels)
 369                         fmt |= (3 << 3);
 370                 if (sign)
 371                         fmt |= 0x04;
 372
 373                 fmt |= (MIXER_ADDR_TVTUNER == dev->dmasound.input) ? 0xc0 : 0x80;
 374                 saa_writeb(SAA7134_NUM_SAMPLES0, ((dev->dmasound.blksize - 1) & 0x0000ff));
 375                 saa_writeb(SAA7134_NUM_SAMPLES1, ((dev->dmasound.blksize - 1) & 0x00ff00) >>  8);
 376                 saa_writeb(SAA7134_NUM_SAMPLES2, ((dev->dmasound.blksize - 1) & 0xff0000) >> 16);
 377                 saa_writeb(SAA7134_AUDIO_FORMAT_CTRL, fmt);
 378
 379                 break;
 380           case PCI_DEVICE_ID_PHILIPS_SAA7133:
 381           case PCI_DEVICE_ID_PHILIPS_SAA7135:
 382                 if (1 == runtime->channels)
 383                         fmt |= (1 << 4);
 384                 if (2 == runtime->channels)
 385                         fmt |= (2 << 4);
 386                 if (!sign)
 387                         fmt |= 0x04;
 388                 saa_writel(SAA7133_NUM_SAMPLES, dev->dmasound.blksize -1);
 389                 saa_writel(SAA7133_AUDIO_CHANNEL, 0x543210 | (fmt << 24));
 390                 break;
 391         }
 392
 393         dprintk("rec_start: afmt=%d ch=%d  =>  fmt=0x%x swap=%c\n",
 394                 runtime->format, runtime->channels, fmt,
 395                 bswap ? 'b' : '-');
 396         /* dma: setup channel 6 (= AUDIO) */
 397         control = SAA7134_RS_CONTROL_BURST_16 |
 398                 SAA7134_RS_CONTROL_ME |
 399                 (dev->dmasound.pt.dma >> 12);
 400         if (bswap)
 401                 control |= SAA7134_RS_CONTROL_BSWAP;
 402
 403         saa_writel(SAA7134_RS_BA1(6),0);
 404         saa_writel(SAA7134_RS_BA2(6),dev->dmasound.blksize);
 405         saa_writel(SAA7134_RS_PITCH(6),0);
 406         saa_writel(SAA7134_RS_CONTROL(6),control);
 407
 408         dev->dmasound.rate = runtime->rate;
 409
 410         return 0;
 411
 412 }
 413
 414 /*
 415  * ALSA pointer fetching
 416  *
 417  *   - One of the ALSA capture callbacks.
 418  *
 419  *   Called whenever a period elapses, it must return the current hardware
 420  *  position of the buffer.
 421  *   Also resets the read counter used to prevent overruns
 422  *
 423  */
 424
 425 static snd_pcm_uframes_t snd_card_saa7134_capture_pointer(snd_pcm_substream_t * substream)
 426 {
 427         snd_pcm_runtime_t *runtime = substream->runtime;
 428         snd_card_saa7134_pcm_t *pcm = runtime->private_data;
 429         struct saa7134_dev *dev=pcm->dev;
 430
 431         if (dev->dmasound.read_count) {
 432                 dev->dmasound.read_count  -= snd_pcm_lib_period_bytes(substream);
 433                 dev->dmasound.read_offset += snd_pcm_lib_period_bytes(substream);
 434                 if (dev->dmasound.read_offset == dev->dmasound.bufsize)
 435                         dev->dmasound.read_offset = 0;
 436         }
 437
 438         return bytes_to_frames(runtime, dev->dmasound.read_offset);
 439 }
 440
 441 /*
 442  * ALSA hardware capabilities definition
 443  */
 444
 445 static snd_pcm_hardware_t snd_card_saa7134_capture =
 446 {
 447         .info =                 (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
 448                                  SNDRV_PCM_INFO_BLOCK_TRANSFER |
 449                                  SNDRV_PCM_INFO_MMAP_VALID),
 450         .formats =              SNDRV_PCM_FMTBIT_S16_LE | \
 451                                 SNDRV_PCM_FMTBIT_S16_BE | \
 452                                 SNDRV_PCM_FMTBIT_S8 | \
 453                                 SNDRV_PCM_FMTBIT_U8 | \
 454                                 SNDRV_PCM_FMTBIT_U16_LE | \
 455                                 SNDRV_PCM_FMTBIT_U16_BE,
 456         .rates =                SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_48000,
 457         .rate_min =             32000,
 458         .rate_max =             48000,
 459         .channels_min =         1,
 460         .channels_max =         2,
 461         .buffer_bytes_max =     (256*1024),
 462         .period_bytes_min =     64,
 463         .period_bytes_max =     (256*1024),
 464         .periods_min =          2,
 465         .periods_max =          1024,
 466 };
 467
 468 static void snd_card_saa7134_runtime_free(snd_pcm_runtime_t *runtime)
 469 {
 470         snd_card_saa7134_pcm_t *pcm = runtime->private_data;
 471
 472         kfree(pcm);
 473 }
 474
 475
 476 /*
 477  * ALSA hardware params
 478  *
 479  *   - One of the ALSA capture callbacks.
 480  *
 481  *   Called on initialization, right before the PCM preparation
 482  *
 483  */
 484
 485 static int snd_card_saa7134_hw_params(snd_pcm_substream_t * substream,
 486                                     snd_pcm_hw_params_t * hw_params)
 487 {
 488         snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
 489         struct saa7134_dev *dev;
 490         unsigned int period_size, periods;
 491         int err;
 492
 493         period_size = params_period_bytes(hw_params);
 494         periods = params_periods(hw_params);
 495
 496         snd_assert(period_size >= 0x100 && period_size <= 0x10000,
 497                    return -EINVAL);
 498         snd_assert(periods >= 2, return -EINVAL);
 499         snd_assert(period_size * periods <= 1024 * 1024, return -EINVAL);
 500
 501         dev = saa7134->dev;
 502
 503         if (dev->dmasound.blocks == periods &&
 504             dev->dmasound.blksize == period_size)
 505                 return 0;
 506
 507         /* release the old buffer */
 508         if (substream->runtime->dma_area) {
 509                 saa7134_pgtable_free(dev->pci, &dev->dmasound.pt);
 510                 videobuf_dma_pci_unmap(dev->pci, &dev->dmasound.dma);
 511                 dsp_buffer_free(dev);
 512                 substream->runtime->dma_area = NULL;
 513         }
 514         dev->dmasound.blocks  = periods;
 515         dev->dmasound.blksize = period_size;
 516         dev->dmasound.bufsize = period_size * periods;
 517
 518         err = dsp_buffer_init(dev);
 519         if (0 != err) {
 520                 dev->dmasound.blocks  = 0;
 521                 dev->dmasound.blksize = 0;
 522                 dev->dmasound.bufsize = 0;
 523                 return err;
 524         }
 525
 526         if (0 != (err = videobuf_dma_pci_map(dev->pci, &dev->dmasound.dma))) {
 527                 dsp_buffer_free(dev);
 528                 return err;
 529         }
 530         if (0 != (err = saa7134_pgtable_alloc(dev->pci,&dev->dmasound.pt))) {
 531                 videobuf_dma_pci_unmap(dev->pci, &dev->dmasound.dma);
 532                 dsp_buffer_free(dev);
 533                 return err;
 534         }
 535         if (0 != (err = saa7134_pgtable_build(dev->pci,&dev->dmasound.pt,
 536                                                 dev->dmasound.dma.sglist,
 537                                                 dev->dmasound.dma.sglen,
 538                                                 0))) {
 539                 saa7134_pgtable_free(dev->pci, &dev->dmasound.pt);
 540                 videobuf_dma_pci_unmap(dev->pci, &dev->dmasound.dma);
 541                 dsp_buffer_free(dev);
 542                 return err;
 543         }
 544
 545         /* I should be able to use runtime->dma_addr in the control
 546            byte, but it doesn't work. So I allocate the DMA using the
 547            V4L functions, and force ALSA to use that as the DMA area */
 548
 549         substream->runtime->dma_area = dev->dmasound.dma.vmalloc;
 550
 551         return 1;
 552
 553 }
 554
 555 /*
 556  * ALSA hardware release
 557  *
 558  *   - One of the ALSA capture callbacks.
 559  *
 560  *   Called after closing the device, but before snd_card_saa7134_capture_close
 561  *   It stops the DMA audio and releases the buffers.
 562  *
 563  */
 564
 565 static int snd_card_saa7134_hw_free(snd_pcm_substream_t * substream)
 566 {
 567         snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
 568         struct saa7134_dev *dev;
 569
 570         dev = saa7134->dev;
 571
 572         if (substream->runtime->dma_area) {
 573                 saa7134_pgtable_free(dev->pci, &dev->dmasound.pt);
 574                 videobuf_dma_pci_unmap(dev->pci, &dev->dmasound.dma);
 575                 dsp_buffer_free(dev);
 576                 substream->runtime->dma_area = NULL;
 577         }
 578
 579         return 0;
 580 }
 581
 582 /*
 583  * ALSA capture finish
 584  *
 585  *   - One of the ALSA capture callbacks.
 586  *
 587  *   Called after closing the device.
 588  *
 589  */
 590
 591 static int snd_card_saa7134_capture_close(snd_pcm_substream_t * substream)
 592 {
 593         return 0;
 594 }
 595
 596 /*
 597  * ALSA capture start
 598  *
 599  *   - One of the ALSA capture callbacks.
 600  *
 601  *   Called when opening the device. It creates and populates the PCM
 602  *  structure
 603  *
 604  */
 605
 606 static int snd_card_saa7134_capture_open(snd_pcm_substream_t * substream)
 607 {
 608         snd_pcm_runtime_t *runtime = substream->runtime;
 609         snd_card_saa7134_pcm_t *pcm;
 610         snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
 611         struct saa7134_dev *dev = saa7134->dev;
 612         int err;
 613
 614         down(&dev->dmasound.lock);
 615
 616         dev->dmasound.read_count  = 0;
 617         dev->dmasound.read_offset = 0;
 618
 619         up(&dev->dmasound.lock);
 620
 621         pcm = kzalloc(sizeof(*pcm), GFP_KERNEL);
 622         if (pcm == NULL)
 623                 return -ENOMEM;
 624
 625         pcm->dev=saa7134->dev;
 626
 627         spin_lock_init(&pcm->lock);
 628
 629         pcm->substream = substream;
 630         runtime->private_data = pcm;
 631         runtime->private_free = snd_card_saa7134_runtime_free;
 632         runtime->hw = snd_card_saa7134_capture;
 633
 634         if ((err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
 635                 return err;
 636
 637         return 0;
 638 }
 639
 640 /*
 641  * ALSA capture callbacks definition
 642  */
 643
 644 static snd_pcm_ops_t snd_card_saa7134_capture_ops = {
 645         .open =                 snd_card_saa7134_capture_open,
 646         .close =                snd_card_saa7134_capture_close,
 647         .ioctl =                snd_pcm_lib_ioctl,
 648         .hw_params =            snd_card_saa7134_hw_params,
 649         .hw_free =              snd_card_saa7134_hw_free,
 650         .prepare =              snd_card_saa7134_capture_prepare,
 651         .trigger =              snd_card_saa7134_capture_trigger,
 652         .pointer =              snd_card_saa7134_capture_pointer,
 653 };
 654
 655 /*
 656  * ALSA PCM setup
 657  *
 658  *   Called when initializing the board. Sets up the name and hooks up
 659  *  the callbacks
 660  *
 661  */
 662
 663 static int snd_card_saa7134_pcm(snd_card_saa7134_t *saa7134, int device)
 664 {
 665         snd_pcm_t *pcm;
 666         int err;
 667
 668         if ((err = snd_pcm_new(saa7134->card, "SAA7134 PCM", device, 0, 1, &pcm)) < 0)
 669                 return err;
 670         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_card_saa7134_capture_ops);
 671         pcm->private_data = saa7134;
 672         pcm->info_flags = 0;
 673         strcpy(pcm->name, "SAA7134 PCM");
 674         return 0;
 675 }
 676
 677 #define SAA713x_VOLUME(xname, xindex, addr) \
 678 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
 679   .info = snd_saa7134_volume_info, \
 680   .get = snd_saa7134_volume_get, .put = snd_saa7134_volume_put, \
 681   .private_value = addr }
 682
 683 static int snd_saa7134_volume_info(snd_kcontrol_t * kcontrol, snd_ctl_elem_info_t * uinfo)
 684 {
 685         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 686         uinfo->count = 2;
 687         uinfo->value.integer.min = 0;
 688         uinfo->value.integer.max = 20;
 689         return 0;
 690 }
 691
 692 static int snd_saa7134_volume_get(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
 693 {
 694         snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol);
 695         int addr = kcontrol->private_value;
 696
 697         ucontrol->value.integer.value[0] = chip->mixer_volume[addr][0];
 698         ucontrol->value.integer.value[1] = chip->mixer_volume[addr][1];
 699         return 0;
 700 }
 701
 702 static int snd_saa7134_volume_put(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
 703 {
 704         snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol);
 705         int change, addr = kcontrol->private_value;
 706         int left, right;
 707
 708         left = ucontrol->value.integer.value[0];
 709         if (left < 0)
 710                 left = 0;
 711         if (left > 20)
 712                 left = 20;
 713         right = ucontrol->value.integer.value[1];
 714         if (right < 0)
 715                 right = 0;
 716         if (right > 20)
 717                 right = 20;
 718         spin_lock_irq(&chip->mixer_lock);
 719         change = chip->mixer_volume[addr][0] != left ||
 720                  chip->mixer_volume[addr][1] != right;
 721         chip->mixer_volume[addr][0] = left;
 722         chip->mixer_volume[addr][1] = right;
 723         spin_unlock_irq(&chip->mixer_lock);
 724         return change;
 725 }
 726
 727 #define SAA713x_CAPSRC(xname, xindex, addr) \
 728 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
 729   .info = snd_saa7134_capsrc_info, \
 730   .get = snd_saa7134_capsrc_get, .put = snd_saa7134_capsrc_put, \
 731   .private_value = addr }
 732
 733 static int snd_saa7134_capsrc_info(snd_kcontrol_t * kcontrol, snd_ctl_elem_info_t * uinfo)
 734 {
 735         uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
 736         uinfo->count = 2;
 737         uinfo->value.integer.min = 0;
 738         uinfo->value.integer.max = 1;
 739         return 0;
 740 }
 741
 742 static int snd_saa7134_capsrc_get(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
 743 {
 744         snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol);
 745         int addr = kcontrol->private_value;
 746
 747         spin_lock_irq(&chip->mixer_lock);
 748         ucontrol->value.integer.value[0] = chip->capture_source[addr][0];
 749         ucontrol->value.integer.value[1] = chip->capture_source[addr][1];
 750         spin_unlock_irq(&chip->mixer_lock);
 751
 752         return 0;
 753 }
 754
 755 static int snd_saa7134_capsrc_put(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
 756 {
 757         snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol);
 758         int change, addr = kcontrol->private_value;
 759         int left, right;
 760         u32 anabar, xbarin;
 761         int analog_io, rate;
 762         struct saa7134_dev *dev;
 763
 764         dev = chip->dev;
 765
 766         left = ucontrol->value.integer.value[0] & 1;
 767         right = ucontrol->value.integer.value[1] & 1;
 768         spin_lock_irq(&chip->mixer_lock);
 769
 770         change = chip->capture_source[addr][0] != left ||
 771                  chip->capture_source[addr][1] != right;
 772         chip->capture_source[addr][0] = left;
 773         chip->capture_source[addr][1] = right;
 774         dev->dmasound.input=addr;
 775         spin_unlock_irq(&chip->mixer_lock);
 776
 777
 778         if (change) {
 779           switch (dev->pci->device) {
 780
 781            case PCI_DEVICE_ID_PHILIPS_SAA7134:
 782                 switch (addr) {
 783                         case MIXER_ADDR_TVTUNER:
 784                                 saa_andorb(SAA7134_AUDIO_FORMAT_CTRL, 0xc0, 0xc0);
 785                                 saa_andorb(SAA7134_SIF_SAMPLE_FREQ,   0x03, 0x00);
 786                                 break;
 787                         case MIXER_ADDR_LINE1:
 788                         case MIXER_ADDR_LINE2:
 789                                 analog_io = (MIXER_ADDR_LINE1 == addr) ? 0x00 : 0x08;
 790                                 rate = (32000 == dev->dmasound.rate) ? 0x01 : 0x03;
 791                                 saa_andorb(SAA7134_ANALOG_IO_SELECT,  0x08, analog_io);
 792                                 saa_andorb(SAA7134_AUDIO_FORMAT_CTRL, 0xc0, 0x80);
 793                                 saa_andorb(SAA7134_SIF_SAMPLE_FREQ,   0x03, rate);
 794                                 break;
 795                 }
 796
 797                 break;
 798            case PCI_DEVICE_ID_PHILIPS_SAA7133:
 799            case PCI_DEVICE_ID_PHILIPS_SAA7135:
 800                 xbarin = 0x03; // adc
 801                 anabar = 0;
 802                 switch (addr) {
 803                         case MIXER_ADDR_TVTUNER:
 804                                 xbarin = 0; // Demodulator
 805                                 anabar = 2; // DACs
 806                                 break;
 807                         case MIXER_ADDR_LINE1:
 808                                 anabar = 0;  // aux1, aux1
 809                                 break;
 810                         case MIXER_ADDR_LINE2:
 811                                 anabar = 9;  // aux2, aux2
 812                                 break;
 813                 }
 814
 815                 /* output xbar always main channel */
 816                 saa_dsp_writel(dev, SAA7133_DIGITAL_OUTPUT_SEL1, 0xbbbb10);
 817
 818                 if (left || right) { // We've got data, turn the input on
 819                   saa_dsp_writel(dev, SAA7133_DIGITAL_INPUT_XBAR1, xbarin);
 820                   saa_writel(SAA7133_ANALOG_IO_SELECT, anabar);
 821                 } else {
 822                   saa_dsp_writel(dev, SAA7133_DIGITAL_INPUT_XBAR1, 0);
 823                   saa_writel(SAA7133_ANALOG_IO_SELECT, 0);
 824                 }
 825                 break;
 826           }
 827         }
 828
 829         return change;
 830 }
 831
 832 static snd_kcontrol_new_t snd_saa7134_controls[] = {
 833 SAA713x_VOLUME("Video Volume", 0, MIXER_ADDR_TVTUNER),
 834 SAA713x_CAPSRC("Video Capture Switch", 0, MIXER_ADDR_TVTUNER),
 835 SAA713x_VOLUME("Line Volume", 1, MIXER_ADDR_LINE1),
 836 SAA713x_CAPSRC("Line Capture Switch", 1, MIXER_ADDR_LINE1),
 837 SAA713x_VOLUME("Line Volume", 2, MIXER_ADDR_LINE2),
 838 SAA713x_CAPSRC("Line Capture Switch", 2, MIXER_ADDR_LINE2),
 839 };
 840
 841 /*
 842  * ALSA mixer setup
 843  *
 844  *   Called when initializing the board. Sets up the name and hooks up
 845  *  the callbacks
 846  *
 847  */
 848
 849 static int snd_card_saa7134_new_mixer(snd_card_saa7134_t * chip)
 850 {
 851         snd_card_t *card = chip->card;
 852         unsigned int idx;
 853         int err;
 854
 855         snd_assert(chip != NULL, return -EINVAL);
 856         strcpy(card->mixername, "SAA7134 Mixer");
 857
 858         for (idx = 0; idx < ARRAY_SIZE(snd_saa7134_controls); idx++) {
 859                 if ((err = snd_ctl_add(card, snd_ctl_new1(&snd_saa7134_controls[idx], chip))) < 0)
 860                         return err;
 861         }
 862         return 0;
 863 }
 864
 865 static void snd_saa7134_free(snd_card_t * card)
 866 {
 867         snd_card_saa7134_t *chip = card->private_data;
 868
 869         if (chip->dev->dmasound.priv_data == NULL)
 870                 return;
 871
 872         if (chip->irq >= 0) {
 873                 synchronize_irq(chip->irq);
 874                 free_irq(chip->irq, &chip->dev->dmasound);
 875         }
 876
 877         chip->dev->dmasound.priv_data = NULL;
 878
 879 }
 880
 881 /*
 882  * ALSA initialization
 883  *
 884  *   Called by the init routine, once for each saa7134 device present,
 885  *  it creates the basic structures and registers the ALSA devices
 886  *
 887  */
 888
 889 static int alsa_card_saa7134_create(struct saa7134_dev *dev, int devnum)
 890 {
 891
 892         snd_card_t *card;
 893         snd_card_saa7134_t *chip;
 894         int err;
 895
 896
 897         if (devnum >= SNDRV_CARDS)
 898                 return -ENODEV;
 899         if (!enable[devnum])
 900                 return -ENODEV;
 901
 902         card = snd_card_new(index[devnum], id[devnum], THIS_MODULE, sizeof(snd_card_saa7134_t));
 903
 904         if (card == NULL)
 905                 return -ENOMEM;
 906
 907         strcpy(card->driver, "SAA7134");
 908
 909         /* Card "creation" */
 910
 911         card->private_free = snd_saa7134_free;
 912         chip = (snd_card_saa7134_t *) card->private_data;
 913
 914         spin_lock_init(&chip->lock);
 915         spin_lock_init(&chip->mixer_lock);
 916
 917         chip->dev = dev;
 918
 919         chip->card = card;
 920
 921         chip->pci = dev->pci;
 922         chip->iobase = pci_resource_start(dev->pci, 0);
 923
 924
 925         err = request_irq(dev->pci->irq, saa7134_alsa_irq,
 926                                 SA_SHIRQ | SA_INTERRUPT, dev->name,
 927                                 (void*) &dev->dmasound);
 928
 929         if (err < 0) {
 930                 printk(KERN_ERR "%s: can't get IRQ %d for ALSA\n",
 931                         dev->name, dev->pci->irq);
 932                 goto __nodev;
 933         }
 934
 935         chip->irq = dev->pci->irq;
 936
 937         init_MUTEX(&dev->dmasound.lock);
 938
 939         if ((err = snd_card_saa7134_new_mixer(chip)) < 0)
 940                 goto __nodev;
 941
 942         if ((err = snd_card_saa7134_pcm(chip, 0)) < 0)
 943                 goto __nodev;
 944
 945         snd_card_set_dev(card, &chip->pci->dev);
 946
 947         /* End of "creation" */
 948
 949         strcpy(card->shortname, "SAA7134");
 950         sprintf(card->longname, "%s at 0x%lx irq %d",
 951                 chip->dev->name, chip->iobase, chip->irq);
 952
 953         printk(KERN_INFO "%s/alsa: %s registered as card %d\n",dev->name,card->longname,index[devnum]);
 954
 955         if ((err = snd_card_register(card)) == 0) {
 956                 snd_saa7134_cards[devnum] = card;
 957                 return 0;
 958         }
 959
 960 __nodev:
 961         snd_card_free(card);
 962         return err;
 963 }
 964
 965
 966 static int alsa_device_init(struct saa7134_dev *dev)
 967 {
 968         dev->dmasound.priv_data = dev;
 969         alsa_card_saa7134_create(dev,dev->nr);
 970         return 1;
 971 }
 972
 973 static int alsa_device_exit(struct saa7134_dev *dev)
 974 {
 975
 976         snd_card_free(snd_saa7134_cards[dev->nr]);
 977         snd_saa7134_cards[dev->nr] = NULL;
 978         return 1;
 979 }
 980
 981 /*
 982  * Module initializer
 983  *
 984  * Loops through present saa7134 cards, and assigns an ALSA device
 985  * to each one
 986  *
 987  */
 988
 989 static int saa7134_alsa_init(void)
 990 {
 991         struct saa7134_dev *dev = NULL;
 992         struct list_head *list;
 993
 994         if (!dmasound_init && !dmasound_exit) {
 995                 dmasound_init = alsa_device_init;
 996                 dmasound_exit = alsa_device_exit;
 997         } else {
 998                 printk(KERN_WARNING "saa7134 ALSA: can't load, DMA sound handler already assigned (probably to OSS)\n");
 999                 return -EBUSY;
1000         }
1001
1002         printk(KERN_INFO "saa7134 ALSA driver for DMA sound loaded\n");
1003
1004         list_for_each(list,&saa7134_devlist) {
1005                 dev = list_entry(list, struct saa7134_dev, devlist);
1006                 if (dev->dmasound.priv_data == NULL) {
1007                         alsa_device_init(dev);
1008                 } else {
1009                         printk(KERN_ERR "saa7134 ALSA: DMA sound is being handled by OSS. ignoring %s\n",dev->name);
1010                         return -EBUSY;
1011                 }
1012         }
1013
1014         if (dev == NULL)
1015                 printk(KERN_INFO "saa7134 ALSA: no saa7134 cards found\n");
1016
1017         return 0;
1018
1019 }
1020
1021 /*
1022  * Module destructor
1023  */
1024
1025 static void saa7134_alsa_exit(void)
1026 {
1027         int idx;
1028
1029         for (idx = 0; idx < SNDRV_CARDS; idx++) {
1030                 snd_card_free(snd_saa7134_cards[idx]);
1031         }
1032
1033         dmasound_init = NULL;
1034         dmasound_exit = NULL;
1035         printk(KERN_INFO "saa7134 ALSA driver for DMA sound unloaded\n");
1036
1037         return;
1038 }
1039
1040 /* We initialize this late, to make sure the sound system is up and running */
1041 late_initcall(saa7134_alsa_init);
1042 module_exit(saa7134_alsa_exit);
1043 MODULE_LICENSE("GPL");
1044 MODULE_AUTHOR("Ricardo Cerqueira");
1045
1046
1047