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         struct snd_card *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         struct snd_pcm_substream *substream;
  99 } snd_card_saa7134_pcm_t;
 100
 101 static struct snd_card *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(struct snd_pcm_substream * substream,
 255                                           int cmd)
 256 {
 257         struct snd_pcm_runtime *runtime = substream->runtime;
 258         snd_card_saa7134_pcm_t *pcm = runtime->private_data;
 259         struct saa7134_dev *dev=pcm->dev;
 260         int err = 0;
 261
 262         spin_lock(&dev->slock);
 263         if (cmd == SNDRV_PCM_TRIGGER_START) {
 264                 /* start dma */
 265                 saa7134_dma_start(dev);
 266         } else if (cmd == SNDRV_PCM_TRIGGER_STOP) {
 267                 /* stop dma */
 268                 saa7134_dma_stop(dev);
 269         } else {
 270                 err = -EINVAL;
 271         }
 272         spin_unlock(&dev->slock);
 273
 274         return err;
 275 }
 276
 277 /*
 278  * DMA buffer initialization
 279  *
 280  *   Uses V4L functions to initialize the DMA. Shouldn't be necessary in
 281  *  ALSA, but I was unable to use ALSA's own DMA, and had to force the
 282  *  usage of V4L's
 283  *
 284  *   - Copied verbatim from saa7134-oss.
 285  *
 286  */
 287
 288 static int dsp_buffer_init(struct saa7134_dev *dev)
 289 {
 290         int err;
 291
 292         BUG_ON(!dev->dmasound.bufsize);
 293
 294         videobuf_dma_init(&dev->dmasound.dma);
 295         err = videobuf_dma_init_kernel(&dev->dmasound.dma, PCI_DMA_FROMDEVICE,
 296                                        (dev->dmasound.bufsize + PAGE_SIZE) >> PAGE_SHIFT);
 297         if (0 != err)
 298                 return err;
 299         return 0;
 300 }
 301
 302 /*
 303  * DMA buffer release
 304  *
 305  *   Called after closing the device, during snd_card_saa7134_capture_close
 306  *
 307  */
 308
 309 static int dsp_buffer_free(struct saa7134_dev *dev)
 310 {
 311         BUG_ON(!dev->dmasound.blksize);
 312
 313         videobuf_dma_free(&dev->dmasound.dma);
 314
 315         dev->dmasound.blocks  = 0;
 316         dev->dmasound.blksize = 0;
 317         dev->dmasound.bufsize = 0;
 318
 319        return 0;
 320 }
 321
 322
 323 /*
 324  * ALSA PCM preparation
 325  *
 326  *   - One of the ALSA capture callbacks.
 327  *
 328  *   Called right after the capture device is opened, this function configures
 329  *  the buffer using the previously defined functions, allocates the memory,
 330  *  sets up the hardware registers, and then starts the DMA. When this function
 331  *  returns, the audio should be flowing.
 332  *
 333  */
 334
 335 static int snd_card_saa7134_capture_prepare(struct snd_pcm_substream * substream)
 336 {
 337         struct snd_pcm_runtime *runtime = substream->runtime;
 338         int bswap, sign;
 339         u32 fmt, control;
 340         snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
 341         struct saa7134_dev *dev;
 342         snd_card_saa7134_pcm_t *pcm = runtime->private_data;
 343
 344         pcm->dev->dmasound.substream = substream;
 345
 346         dev = saa7134->dev;
 347
 348         if (snd_pcm_format_width(runtime->format) == 8)
 349                 fmt = 0x00;
 350         else
 351                 fmt = 0x01;
 352
 353         if (snd_pcm_format_signed(runtime->format))
 354                 sign = 1;
 355         else
 356                 sign = 0;
 357
 358         if (snd_pcm_format_big_endian(runtime->format))
 359                 bswap = 1;
 360         else
 361                 bswap = 0;
 362
 363         switch (dev->pci->device) {
 364           case PCI_DEVICE_ID_PHILIPS_SAA7134:
 365                 if (1 == runtime->channels)
 366                         fmt |= (1 << 3);
 367                 if (2 == runtime->channels)
 368                         fmt |= (3 << 3);
 369                 if (sign)
 370                         fmt |= 0x04;
 371
 372                 fmt |= (MIXER_ADDR_TVTUNER == dev->dmasound.input) ? 0xc0 : 0x80;
 373                 saa_writeb(SAA7134_NUM_SAMPLES0, ((dev->dmasound.blksize - 1) & 0x0000ff));
 374                 saa_writeb(SAA7134_NUM_SAMPLES1, ((dev->dmasound.blksize - 1) & 0x00ff00) >>  8);
 375                 saa_writeb(SAA7134_NUM_SAMPLES2, ((dev->dmasound.blksize - 1) & 0xff0000) >> 16);
 376                 saa_writeb(SAA7134_AUDIO_FORMAT_CTRL, fmt);
 377
 378                 break;
 379           case PCI_DEVICE_ID_PHILIPS_SAA7133:
 380           case PCI_DEVICE_ID_PHILIPS_SAA7135:
 381                 if (1 == runtime->channels)
 382                         fmt |= (1 << 4);
 383                 if (2 == runtime->channels)
 384                         fmt |= (2 << 4);
 385                 if (!sign)
 386                         fmt |= 0x04;
 387                 saa_writel(SAA7133_NUM_SAMPLES, dev->dmasound.blksize -1);
 388                 saa_writel(SAA7133_AUDIO_CHANNEL, 0x543210 | (fmt << 24));
 389                 break;
 390         }
 391
 392         dprintk("rec_start: afmt=%d ch=%d  =>  fmt=0x%x swap=%c\n",
 393                 runtime->format, runtime->channels, fmt,
 394                 bswap ? 'b' : '-');
 395         /* dma: setup channel 6 (= AUDIO) */
 396         control = SAA7134_RS_CONTROL_BURST_16 |
 397                 SAA7134_RS_CONTROL_ME |
 398                 (dev->dmasound.pt.dma >> 12);
 399         if (bswap)
 400                 control |= SAA7134_RS_CONTROL_BSWAP;
 401
 402         saa_writel(SAA7134_RS_BA1(6),0);
 403         saa_writel(SAA7134_RS_BA2(6),dev->dmasound.blksize);
 404         saa_writel(SAA7134_RS_PITCH(6),0);
 405         saa_writel(SAA7134_RS_CONTROL(6),control);
 406
 407         dev->dmasound.rate = runtime->rate;
 408
 409         return 0;
 410
 411 }
 412
 413 /*
 414  * ALSA pointer fetching
 415  *
 416  *   - One of the ALSA capture callbacks.
 417  *
 418  *   Called whenever a period elapses, it must return the current hardware
 419  *  position of the buffer.
 420  *   Also resets the read counter used to prevent overruns
 421  *
 422  */
 423
 424 static snd_pcm_uframes_t
 425 snd_card_saa7134_capture_pointer(struct snd_pcm_substream * substream)
 426 {
 427         struct snd_pcm_runtime *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 struct snd_pcm_hardware 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(struct snd_pcm_runtime *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(struct snd_pcm_substream * substream,
 486                                       struct snd_pcm_hw_params * 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_pci_dma_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_pci_dma_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_pci_dma_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_pci_dma_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(struct snd_pcm_substream * 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_pci_dma_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(struct snd_pcm_substream * substream)
 592 {
 593         snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
 594         struct saa7134_dev *dev = saa7134->dev;
 595
 596         dev->ctl_mute = 1;
 597         saa7134_tvaudio_setmute(dev);
 598         return 0;
 599 }
 600
 601 /*
 602  * ALSA capture start
 603  *
 604  *   - One of the ALSA capture callbacks.
 605  *
 606  *   Called when opening the device. It creates and populates the PCM
 607  *  structure
 608  *
 609  */
 610
 611 static int snd_card_saa7134_capture_open(struct snd_pcm_substream * substream)
 612 {
 613         struct snd_pcm_runtime *runtime = substream->runtime;
 614         snd_card_saa7134_pcm_t *pcm;
 615         snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
 616         struct saa7134_dev *dev = saa7134->dev;
 617         int err;
 618
 619         mutex_lock(&dev->dmasound.lock);
 620
 621         dev->dmasound.read_count  = 0;
 622         dev->dmasound.read_offset = 0;
 623
 624         mutex_unlock(&dev->dmasound.lock);
 625
 626         pcm = kzalloc(sizeof(*pcm), GFP_KERNEL);
 627         if (pcm == NULL)
 628                 return -ENOMEM;
 629
 630         pcm->dev=saa7134->dev;
 631
 632         spin_lock_init(&pcm->lock);
 633
 634         pcm->substream = substream;
 635         runtime->private_data = pcm;
 636         runtime->private_free = snd_card_saa7134_runtime_free;
 637         runtime->hw = snd_card_saa7134_capture;
 638
 639         dev->ctl_mute = 0;
 640         saa7134_tvaudio_setmute(dev);
 641
 642         if ((err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
 643                 return err;
 644
 645         return 0;
 646 }
 647
 648 /*
 649  * ALSA capture callbacks definition
 650  */
 651
 652 static struct snd_pcm_ops snd_card_saa7134_capture_ops = {
 653         .open =                 snd_card_saa7134_capture_open,
 654         .close =                snd_card_saa7134_capture_close,
 655         .ioctl =                snd_pcm_lib_ioctl,
 656         .hw_params =            snd_card_saa7134_hw_params,
 657         .hw_free =              snd_card_saa7134_hw_free,
 658         .prepare =              snd_card_saa7134_capture_prepare,
 659         .trigger =              snd_card_saa7134_capture_trigger,
 660         .pointer =              snd_card_saa7134_capture_pointer,
 661 };
 662
 663 /*
 664  * ALSA PCM setup
 665  *
 666  *   Called when initializing the board. Sets up the name and hooks up
 667  *  the callbacks
 668  *
 669  */
 670
 671 static int snd_card_saa7134_pcm(snd_card_saa7134_t *saa7134, int device)
 672 {
 673         struct snd_pcm *pcm;
 674         int err;
 675
 676         if ((err = snd_pcm_new(saa7134->card, "SAA7134 PCM", device, 0, 1, &pcm)) < 0)
 677                 return err;
 678         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_card_saa7134_capture_ops);
 679         pcm->private_data = saa7134;
 680         pcm->info_flags = 0;
 681         strcpy(pcm->name, "SAA7134 PCM");
 682         return 0;
 683 }
 684
 685 #define SAA713x_VOLUME(xname, xindex, addr) \
 686 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
 687   .info = snd_saa7134_volume_info, \
 688   .get = snd_saa7134_volume_get, .put = snd_saa7134_volume_put, \
 689   .private_value = addr }
 690
 691 static int snd_saa7134_volume_info(struct snd_kcontrol * kcontrol,
 692                                    struct snd_ctl_elem_info * uinfo)
 693 {
 694         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 695         uinfo->count = 2;
 696         uinfo->value.integer.min = 0;
 697         uinfo->value.integer.max = 20;
 698         return 0;
 699 }
 700
 701 static int snd_saa7134_volume_get(struct snd_kcontrol * kcontrol,
 702                                   struct snd_ctl_elem_value * ucontrol)
 703 {
 704         snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol);
 705         int addr = kcontrol->private_value;
 706
 707         ucontrol->value.integer.value[0] = chip->mixer_volume[addr][0];
 708         ucontrol->value.integer.value[1] = chip->mixer_volume[addr][1];
 709         return 0;
 710 }
 711
 712 static int snd_saa7134_volume_put(struct snd_kcontrol * kcontrol,
 713                                   struct snd_ctl_elem_value * ucontrol)
 714 {
 715         snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol);
 716         int change, addr = kcontrol->private_value;
 717         int left, right;
 718
 719         left = ucontrol->value.integer.value[0];
 720         if (left < 0)
 721                 left = 0;
 722         if (left > 20)
 723                 left = 20;
 724         right = ucontrol->value.integer.value[1];
 725         if (right < 0)
 726                 right = 0;
 727         if (right > 20)
 728                 right = 20;
 729         spin_lock_irq(&chip->mixer_lock);
 730         change = chip->mixer_volume[addr][0] != left ||
 731                  chip->mixer_volume[addr][1] != right;
 732         chip->mixer_volume[addr][0] = left;
 733         chip->mixer_volume[addr][1] = right;
 734         spin_unlock_irq(&chip->mixer_lock);
 735         return change;
 736 }
 737
 738 #define SAA713x_CAPSRC(xname, xindex, addr) \
 739 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
 740   .info = snd_saa7134_capsrc_info, \
 741   .get = snd_saa7134_capsrc_get, .put = snd_saa7134_capsrc_put, \
 742   .private_value = addr }
 743
 744 static int snd_saa7134_capsrc_info(struct snd_kcontrol * kcontrol,
 745                                    struct snd_ctl_elem_info * uinfo)
 746 {
 747         uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
 748         uinfo->count = 2;
 749         uinfo->value.integer.min = 0;
 750         uinfo->value.integer.max = 1;
 751         return 0;
 752 }
 753
 754 static int snd_saa7134_capsrc_get(struct snd_kcontrol * kcontrol,
 755                                   struct snd_ctl_elem_value * ucontrol)
 756 {
 757         snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol);
 758         int addr = kcontrol->private_value;
 759
 760         spin_lock_irq(&chip->mixer_lock);
 761         ucontrol->value.integer.value[0] = chip->capture_source[addr][0];
 762         ucontrol->value.integer.value[1] = chip->capture_source[addr][1];
 763         spin_unlock_irq(&chip->mixer_lock);
 764
 765         return 0;
 766 }
 767
 768 static int snd_saa7134_capsrc_put(struct snd_kcontrol * kcontrol,
 769                                   struct snd_ctl_elem_value * ucontrol)
 770 {
 771         snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol);
 772         int change, addr = kcontrol->private_value;
 773         int left, right;
 774         u32 anabar, xbarin;
 775         int analog_io, rate;
 776         struct saa7134_dev *dev;
 777
 778         dev = chip->dev;
 779
 780         left = ucontrol->value.integer.value[0] & 1;
 781         right = ucontrol->value.integer.value[1] & 1;
 782         spin_lock_irq(&chip->mixer_lock);
 783
 784         change = chip->capture_source[addr][0] != left ||
 785                  chip->capture_source[addr][1] != right;
 786         chip->capture_source[addr][0] = left;
 787         chip->capture_source[addr][1] = right;
 788         dev->dmasound.input=addr;
 789         spin_unlock_irq(&chip->mixer_lock);
 790
 791
 792         if (change) {
 793           switch (dev->pci->device) {
 794
 795            case PCI_DEVICE_ID_PHILIPS_SAA7134:
 796                 switch (addr) {
 797                         case MIXER_ADDR_TVTUNER:
 798                                 saa_andorb(SAA7134_AUDIO_FORMAT_CTRL, 0xc0, 0xc0);
 799                                 saa_andorb(SAA7134_SIF_SAMPLE_FREQ,   0x03, 0x00);
 800                                 break;
 801                         case MIXER_ADDR_LINE1:
 802                         case MIXER_ADDR_LINE2:
 803                                 analog_io = (MIXER_ADDR_LINE1 == addr) ? 0x00 : 0x08;
 804                                 rate = (32000 == dev->dmasound.rate) ? 0x01 : 0x03;
 805                                 saa_andorb(SAA7134_ANALOG_IO_SELECT,  0x08, analog_io);
 806                                 saa_andorb(SAA7134_AUDIO_FORMAT_CTRL, 0xc0, 0x80);
 807                                 saa_andorb(SAA7134_SIF_SAMPLE_FREQ,   0x03, rate);
 808                                 break;
 809                 }
 810
 811                 break;
 812            case PCI_DEVICE_ID_PHILIPS_SAA7133:
 813            case PCI_DEVICE_ID_PHILIPS_SAA7135:
 814                 xbarin = 0x03; // adc
 815                 anabar = 0;
 816                 switch (addr) {
 817                         case MIXER_ADDR_TVTUNER:
 818                                 xbarin = 0; // Demodulator
 819                                 anabar = 2; // DACs
 820                                 break;
 821                         case MIXER_ADDR_LINE1:
 822                                 anabar = 0;  // aux1, aux1
 823                                 break;
 824                         case MIXER_ADDR_LINE2:
 825                                 anabar = 9;  // aux2, aux2
 826                                 break;
 827                 }
 828
 829                 /* output xbar always main channel */
 830                 saa_dsp_writel(dev, SAA7133_DIGITAL_OUTPUT_SEL1, 0xbbbb10);
 831
 832                 if (left || right) { // We've got data, turn the input on
 833                   saa_dsp_writel(dev, SAA7133_DIGITAL_INPUT_XBAR1, xbarin);
 834                   saa_writel(SAA7133_ANALOG_IO_SELECT, anabar);
 835                 } else {
 836                   saa_dsp_writel(dev, SAA7133_DIGITAL_INPUT_XBAR1, 0);
 837                   saa_writel(SAA7133_ANALOG_IO_SELECT, 0);
 838                 }
 839                 break;
 840           }
 841         }
 842
 843         return change;
 844 }
 845
 846 static struct snd_kcontrol_new snd_saa7134_controls[] = {
 847 SAA713x_VOLUME("Video Volume", 0, MIXER_ADDR_TVTUNER),
 848 SAA713x_CAPSRC("Video Capture Switch", 0, MIXER_ADDR_TVTUNER),
 849 SAA713x_VOLUME("Line Volume", 1, MIXER_ADDR_LINE1),
 850 SAA713x_CAPSRC("Line Capture Switch", 1, MIXER_ADDR_LINE1),
 851 SAA713x_VOLUME("Line Volume", 2, MIXER_ADDR_LINE2),
 852 SAA713x_CAPSRC("Line Capture Switch", 2, MIXER_ADDR_LINE2),
 853 };
 854
 855 /*
 856  * ALSA mixer setup
 857  *
 858  *   Called when initializing the board. Sets up the name and hooks up
 859  *  the callbacks
 860  *
 861  */
 862
 863 static int snd_card_saa7134_new_mixer(snd_card_saa7134_t * chip)
 864 {
 865         struct snd_card *card = chip->card;
 866         unsigned int idx;
 867         int err;
 868
 869         snd_assert(chip != NULL, return -EINVAL);
 870         strcpy(card->mixername, "SAA7134 Mixer");
 871
 872         for (idx = 0; idx < ARRAY_SIZE(snd_saa7134_controls); idx++) {
 873                 if ((err = snd_ctl_add(card, snd_ctl_new1(&snd_saa7134_controls[idx], chip))) < 0)
 874                         return err;
 875         }
 876         return 0;
 877 }
 878
 879 static void snd_saa7134_free(struct snd_card * card)
 880 {
 881         snd_card_saa7134_t *chip = card->private_data;
 882
 883         if (chip->dev->dmasound.priv_data == NULL)
 884                 return;
 885
 886         if (chip->irq >= 0) {
 887                 synchronize_irq(chip->irq);
 888                 free_irq(chip->irq, &chip->dev->dmasound);
 889         }
 890
 891         chip->dev->dmasound.priv_data = NULL;
 892
 893 }
 894
 895 /*
 896  * ALSA initialization
 897  *
 898  *   Called by the init routine, once for each saa7134 device present,
 899  *  it creates the basic structures and registers the ALSA devices
 900  *
 901  */
 902
 903 static int alsa_card_saa7134_create(struct saa7134_dev *dev, int devnum)
 904 {
 905
 906         struct snd_card *card;
 907         snd_card_saa7134_t *chip;
 908         int err;
 909
 910
 911         if (devnum >= SNDRV_CARDS)
 912                 return -ENODEV;
 913         if (!enable[devnum])
 914                 return -ENODEV;
 915
 916         card = snd_card_new(index[devnum], id[devnum], THIS_MODULE, sizeof(snd_card_saa7134_t));
 917
 918         if (card == NULL)
 919                 return -ENOMEM;
 920
 921         strcpy(card->driver, "SAA7134");
 922
 923         /* Card "creation" */
 924
 925         card->private_free = snd_saa7134_free;
 926         chip = (snd_card_saa7134_t *) card->private_data;
 927
 928         spin_lock_init(&chip->lock);
 929         spin_lock_init(&chip->mixer_lock);
 930
 931         chip->dev = dev;
 932
 933         chip->card = card;
 934
 935         chip->pci = dev->pci;
 936         chip->iobase = pci_resource_start(dev->pci, 0);
 937
 938
 939         err = request_irq(dev->pci->irq, saa7134_alsa_irq,
 940                                 IRQF_SHARED | IRQF_DISABLED, dev->name,
 941                                 (void*) &dev->dmasound);
 942
 943         if (err < 0) {
 944                 printk(KERN_ERR "%s: can't get IRQ %d for ALSA\n",
 945                         dev->name, dev->pci->irq);
 946                 goto __nodev;
 947         }
 948
 949         chip->irq = dev->pci->irq;
 950
 951         mutex_init(&dev->dmasound.lock);
 952
 953         if ((err = snd_card_saa7134_new_mixer(chip)) < 0)
 954                 goto __nodev;
 955
 956         if ((err = snd_card_saa7134_pcm(chip, 0)) < 0)
 957                 goto __nodev;
 958
 959         snd_card_set_dev(card, &chip->pci->dev);
 960
 961         /* End of "creation" */
 962
 963         strcpy(card->shortname, "SAA7134");
 964         sprintf(card->longname, "%s at 0x%lx irq %d",
 965                 chip->dev->name, chip->iobase, chip->irq);
 966
 967         printk(KERN_INFO "%s/alsa: %s registered as card %d\n",dev->name,card->longname,index[devnum]);
 968
 969         if ((err = snd_card_register(card)) == 0) {
 970                 snd_saa7134_cards[devnum] = card;
 971                 return 0;
 972         }
 973
 974 __nodev:
 975         snd_card_free(card);
 976         return err;
 977 }
 978
 979
 980 static int alsa_device_init(struct saa7134_dev *dev)
 981 {
 982         dev->dmasound.priv_data = dev;
 983         alsa_card_saa7134_create(dev,dev->nr);
 984         return 1;
 985 }
 986
 987 static int alsa_device_exit(struct saa7134_dev *dev)
 988 {
 989
 990         snd_card_free(snd_saa7134_cards[dev->nr]);
 991         snd_saa7134_cards[dev->nr] = NULL;
 992         return 1;
 993 }
 994
 995 /*
 996  * Module initializer
 997  *
 998  * Loops through present saa7134 cards, and assigns an ALSA device
 999  * to each one
1000  *
1001  */
1002
1003 static int saa7134_alsa_init(void)
1004 {
1005         struct saa7134_dev *dev = NULL;
1006         struct list_head *list;
1007
1008         if (!saa7134_dmasound_init && !saa7134_dmasound_exit) {
1009                 saa7134_dmasound_init = alsa_device_init;
1010                 saa7134_dmasound_exit = alsa_device_exit;
1011         } else {
1012                 printk(KERN_WARNING "saa7134 ALSA: can't load, DMA sound handler already assigned (probably to OSS)\n");
1013                 return -EBUSY;
1014         }
1015
1016         printk(KERN_INFO "saa7134 ALSA driver for DMA sound loaded\n");
1017
1018         list_for_each(list,&saa7134_devlist) {
1019                 dev = list_entry(list, struct saa7134_dev, devlist);
1020                 if (dev->dmasound.priv_data == NULL) {
1021                         alsa_device_init(dev);
1022                 } else {
1023                         printk(KERN_ERR "saa7134 ALSA: DMA sound is being handled by OSS. ignoring %s\n",dev->name);
1024                         return -EBUSY;
1025                 }
1026         }
1027
1028         if (dev == NULL)
1029                 printk(KERN_INFO "saa7134 ALSA: no saa7134 cards found\n");
1030
1031         return 0;
1032
1033 }
1034
1035 /*
1036  * Module destructor
1037  */
1038
1039 static void saa7134_alsa_exit(void)
1040 {
1041         int idx;
1042
1043         for (idx = 0; idx < SNDRV_CARDS; idx++) {
1044                 snd_card_free(snd_saa7134_cards[idx]);
1045         }
1046
1047         saa7134_dmasound_init = NULL;
1048         saa7134_dmasound_exit = NULL;
1049         printk(KERN_INFO "saa7134 ALSA driver for DMA sound unloaded\n");
1050
1051         return;
1052 }
1053
1054 /* We initialize this late, to make sure the sound system is up and running */
1055 late_initcall(saa7134_alsa_init);
1056 module_exit(saa7134_alsa_exit);
1057 MODULE_LICENSE("GPL");
1058 MODULE_AUTHOR("Ricardo Cerqueira");
1059
1060
1061