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         s16 irq;
  79         u16 mute_was_on;
  80
  81         spinlock_t lock;
  82 } snd_card_saa7134_t;
  83
  84
  85
  86 /*
  87  * PCM structure
  88  */
  89
  90 typedef struct snd_card_saa7134_pcm {
  91         struct saa7134_dev *dev;
  92
  93         spinlock_t lock;
  94
  95         struct snd_pcm_substream *substream;
  96 } snd_card_saa7134_pcm_t;
  97
  98 static struct snd_card *snd_saa7134_cards[SNDRV_CARDS];
  99
 100
 101 /*
 102  * saa7134 DMA audio stop
 103  *
 104  *   Called when the capture device is released or the buffer overflows
 105  *
 106  *   - Copied verbatim from saa7134-oss's dsp_dma_stop.
 107  *
 108  */
 109
 110 static void saa7134_dma_stop(struct saa7134_dev *dev)
 111 {
 112         dev->dmasound.dma_blk     = -1;
 113         dev->dmasound.dma_running = 0;
 114         saa7134_set_dmabits(dev);
 115 }
 116
 117 /*
 118  * saa7134 DMA audio start
 119  *
 120  *   Called when preparing the capture device for use
 121  *
 122  *   - Copied verbatim from saa7134-oss's dsp_dma_start.
 123  *
 124  */
 125
 126 static void saa7134_dma_start(struct saa7134_dev *dev)
 127 {
 128         dev->dmasound.dma_blk     = 0;
 129         dev->dmasound.dma_running = 1;
 130         saa7134_set_dmabits(dev);
 131 }
 132
 133 /*
 134  * saa7134 audio DMA IRQ handler
 135  *
 136  *   Called whenever we get an SAA7134_IRQ_REPORT_DONE_RA3 interrupt
 137  *   Handles shifting between the 2 buffers, manages the read counters,
 138  *  and notifies ALSA when periods elapse
 139  *
 140  *   - Mostly copied from saa7134-oss's saa7134_irq_oss_done.
 141  *
 142  */
 143
 144 static void saa7134_irq_alsa_done(struct saa7134_dev *dev,
 145                                   unsigned long status)
 146 {
 147         int next_blk, reg = 0;
 148
 149         spin_lock(&dev->slock);
 150         if (UNSET == dev->dmasound.dma_blk) {
 151                 dprintk("irq: recording stopped\n");
 152                 goto done;
 153         }
 154         if (0 != (status & 0x0f000000))
 155                 dprintk("irq: lost %ld\n", (status >> 24) & 0x0f);
 156         if (0 == (status & 0x10000000)) {
 157                 /* odd */
 158                 if (0 == (dev->dmasound.dma_blk & 0x01))
 159                         reg = SAA7134_RS_BA1(6);
 160         } else {
 161                 /* even */
 162                 if (1 == (dev->dmasound.dma_blk & 0x01))
 163                         reg = SAA7134_RS_BA2(6);
 164         }
 165         if (0 == reg) {
 166                 dprintk("irq: field oops [%s]\n",
 167                         (status & 0x10000000) ? "even" : "odd");
 168                 goto done;
 169         }
 170
 171         if (dev->dmasound.read_count >= dev->dmasound.blksize * (dev->dmasound.blocks-2)) {
 172                 dprintk("irq: overrun [full=%d/%d] - Blocks in %d\n",dev->dmasound.read_count,
 173                         dev->dmasound.bufsize, dev->dmasound.blocks);
 174                 spin_unlock(&dev->slock);
 175                 snd_pcm_stop(dev->dmasound.substream,SNDRV_PCM_STATE_XRUN);
 176                 return;
 177         }
 178
 179         /* next block addr */
 180         next_blk = (dev->dmasound.dma_blk + 2) % dev->dmasound.blocks;
 181         saa_writel(reg,next_blk * dev->dmasound.blksize);
 182         if (debug > 2)
 183                 dprintk("irq: ok, %s, next_blk=%d, addr=%x, blocks=%u, size=%u, read=%u\n",
 184                         (status & 0x10000000) ? "even" : "odd ", next_blk,
 185                         next_blk * dev->dmasound.blksize, dev->dmasound.blocks, dev->dmasound.blksize, dev->dmasound.read_count);
 186
 187         /* update status & wake waiting readers */
 188         dev->dmasound.dma_blk = (dev->dmasound.dma_blk + 1) % dev->dmasound.blocks;
 189         dev->dmasound.read_count += dev->dmasound.blksize;
 190
 191         dev->dmasound.recording_on = reg;
 192
 193         if (dev->dmasound.read_count >= snd_pcm_lib_period_bytes(dev->dmasound.substream)) {
 194                 spin_unlock(&dev->slock);
 195                 snd_pcm_period_elapsed(dev->dmasound.substream);
 196                 spin_lock(&dev->slock);
 197         }
 198
 199  done:
 200         spin_unlock(&dev->slock);
 201
 202 }
 203
 204 /*
 205  * IRQ request handler
 206  *
 207  *   Runs along with saa7134's IRQ handler, discards anything that isn't
 208  *   DMA sound
 209  *
 210  */
 211
 212 static irqreturn_t saa7134_alsa_irq(int irq, void *dev_id)
 213 {
 214         struct saa7134_dmasound *dmasound = dev_id;
 215         struct saa7134_dev *dev = dmasound->priv_data;
 216
 217         unsigned long report, status;
 218         int loop, handled = 0;
 219
 220         for (loop = 0; loop < 10; loop++) {
 221                 report = saa_readl(SAA7134_IRQ_REPORT);
 222                 status = saa_readl(SAA7134_IRQ_STATUS);
 223
 224                 if (report & SAA7134_IRQ_REPORT_DONE_RA3) {
 225                         handled = 1;
 226                         saa_writel(SAA7134_IRQ_REPORT,report);
 227                         saa7134_irq_alsa_done(dev, status);
 228                 } else {
 229                         goto out;
 230                 }
 231         }
 232
 233         if (loop == 10) {
 234                 dprintk("error! looping IRQ!");
 235         }
 236
 237 out:
 238         return IRQ_RETVAL(handled);
 239 }
 240
 241 /*
 242  * ALSA capture trigger
 243  *
 244  *   - One of the ALSA capture callbacks.
 245  *
 246  *   Called whenever a capture is started or stopped. Must be defined,
 247  *   but there's nothing we want to do here
 248  *
 249  */
 250
 251 static int snd_card_saa7134_capture_trigger(struct snd_pcm_substream * substream,
 252                                           int cmd)
 253 {
 254         struct snd_pcm_runtime *runtime = substream->runtime;
 255         snd_card_saa7134_pcm_t *pcm = runtime->private_data;
 256         struct saa7134_dev *dev=pcm->dev;
 257         int err = 0;
 258
 259         spin_lock(&dev->slock);
 260         if (cmd == SNDRV_PCM_TRIGGER_START) {
 261                 /* start dma */
 262                 saa7134_dma_start(dev);
 263         } else if (cmd == SNDRV_PCM_TRIGGER_STOP) {
 264                 /* stop dma */
 265                 saa7134_dma_stop(dev);
 266         } else {
 267                 err = -EINVAL;
 268         }
 269         spin_unlock(&dev->slock);
 270
 271         return err;
 272 }
 273
 274 /*
 275  * DMA buffer initialization
 276  *
 277  *   Uses V4L functions to initialize the DMA. Shouldn't be necessary in
 278  *  ALSA, but I was unable to use ALSA's own DMA, and had to force the
 279  *  usage of V4L's
 280  *
 281  *   - Copied verbatim from saa7134-oss.
 282  *
 283  */
 284
 285 static int dsp_buffer_init(struct saa7134_dev *dev)
 286 {
 287         int err;
 288
 289         BUG_ON(!dev->dmasound.bufsize);
 290
 291         videobuf_dma_init(&dev->dmasound.dma);
 292         err = videobuf_dma_init_kernel(&dev->dmasound.dma, PCI_DMA_FROMDEVICE,
 293                                        (dev->dmasound.bufsize + PAGE_SIZE) >> PAGE_SHIFT);
 294         if (0 != err)
 295                 return err;
 296         return 0;
 297 }
 298
 299 /*
 300  * DMA buffer release
 301  *
 302  *   Called after closing the device, during snd_card_saa7134_capture_close
 303  *
 304  */
 305
 306 static int dsp_buffer_free(struct saa7134_dev *dev)
 307 {
 308         BUG_ON(!dev->dmasound.blksize);
 309
 310         videobuf_dma_free(&dev->dmasound.dma);
 311
 312         dev->dmasound.blocks  = 0;
 313         dev->dmasound.blksize = 0;
 314         dev->dmasound.bufsize = 0;
 315
 316        return 0;
 317 }
 318
 319
 320 /*
 321  * ALSA PCM preparation
 322  *
 323  *   - One of the ALSA capture callbacks.
 324  *
 325  *   Called right after the capture device is opened, this function configures
 326  *  the buffer using the previously defined functions, allocates the memory,
 327  *  sets up the hardware registers, and then starts the DMA. When this function
 328  *  returns, the audio should be flowing.
 329  *
 330  */
 331
 332 static int snd_card_saa7134_capture_prepare(struct snd_pcm_substream * substream)
 333 {
 334         struct snd_pcm_runtime *runtime = substream->runtime;
 335         int bswap, sign;
 336         u32 fmt, control;
 337         snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
 338         struct saa7134_dev *dev;
 339         snd_card_saa7134_pcm_t *pcm = runtime->private_data;
 340
 341         pcm->dev->dmasound.substream = substream;
 342
 343         dev = saa7134->dev;
 344
 345         if (snd_pcm_format_width(runtime->format) == 8)
 346                 fmt = 0x00;
 347         else
 348                 fmt = 0x01;
 349
 350         if (snd_pcm_format_signed(runtime->format))
 351                 sign = 1;
 352         else
 353                 sign = 0;
 354
 355         if (snd_pcm_format_big_endian(runtime->format))
 356                 bswap = 1;
 357         else
 358                 bswap = 0;
 359
 360         switch (dev->pci->device) {
 361           case PCI_DEVICE_ID_PHILIPS_SAA7134:
 362                 if (1 == runtime->channels)
 363                         fmt |= (1 << 3);
 364                 if (2 == runtime->channels)
 365                         fmt |= (3 << 3);
 366                 if (sign)
 367                         fmt |= 0x04;
 368
 369                 fmt |= (MIXER_ADDR_TVTUNER == dev->dmasound.input) ? 0xc0 : 0x80;
 370                 saa_writeb(SAA7134_NUM_SAMPLES0, ((dev->dmasound.blksize - 1) & 0x0000ff));
 371                 saa_writeb(SAA7134_NUM_SAMPLES1, ((dev->dmasound.blksize - 1) & 0x00ff00) >>  8);
 372                 saa_writeb(SAA7134_NUM_SAMPLES2, ((dev->dmasound.blksize - 1) & 0xff0000) >> 16);
 373                 saa_writeb(SAA7134_AUDIO_FORMAT_CTRL, fmt);
 374
 375                 break;
 376           case PCI_DEVICE_ID_PHILIPS_SAA7133:
 377           case PCI_DEVICE_ID_PHILIPS_SAA7135:
 378                 if (1 == runtime->channels)
 379                         fmt |= (1 << 4);
 380                 if (2 == runtime->channels)
 381                         fmt |= (2 << 4);
 382                 if (!sign)
 383                         fmt |= 0x04;
 384                 saa_writel(SAA7133_NUM_SAMPLES, dev->dmasound.blksize -1);
 385                 saa_writel(SAA7133_AUDIO_CHANNEL, 0x543210 | (fmt << 24));
 386                 break;
 387         }
 388
 389         dprintk("rec_start: afmt=%d ch=%d  =>  fmt=0x%x swap=%c\n",
 390                 runtime->format, runtime->channels, fmt,
 391                 bswap ? 'b' : '-');
 392         /* dma: setup channel 6 (= AUDIO) */
 393         control = SAA7134_RS_CONTROL_BURST_16 |
 394                 SAA7134_RS_CONTROL_ME |
 395                 (dev->dmasound.pt.dma >> 12);
 396         if (bswap)
 397                 control |= SAA7134_RS_CONTROL_BSWAP;
 398
 399         saa_writel(SAA7134_RS_BA1(6),0);
 400         saa_writel(SAA7134_RS_BA2(6),dev->dmasound.blksize);
 401         saa_writel(SAA7134_RS_PITCH(6),0);
 402         saa_writel(SAA7134_RS_CONTROL(6),control);
 403
 404         dev->dmasound.rate = runtime->rate;
 405
 406         return 0;
 407
 408 }
 409
 410 /*
 411  * ALSA pointer fetching
 412  *
 413  *   - One of the ALSA capture callbacks.
 414  *
 415  *   Called whenever a period elapses, it must return the current hardware
 416  *  position of the buffer.
 417  *   Also resets the read counter used to prevent overruns
 418  *
 419  */
 420
 421 static snd_pcm_uframes_t
 422 snd_card_saa7134_capture_pointer(struct snd_pcm_substream * substream)
 423 {
 424         struct snd_pcm_runtime *runtime = substream->runtime;
 425         snd_card_saa7134_pcm_t *pcm = runtime->private_data;
 426         struct saa7134_dev *dev=pcm->dev;
 427
 428         if (dev->dmasound.read_count) {
 429                 dev->dmasound.read_count  -= snd_pcm_lib_period_bytes(substream);
 430                 dev->dmasound.read_offset += snd_pcm_lib_period_bytes(substream);
 431                 if (dev->dmasound.read_offset == dev->dmasound.bufsize)
 432                         dev->dmasound.read_offset = 0;
 433         }
 434
 435         return bytes_to_frames(runtime, dev->dmasound.read_offset);
 436 }
 437
 438 /*
 439  * ALSA hardware capabilities definition
 440  */
 441
 442 static struct snd_pcm_hardware snd_card_saa7134_capture =
 443 {
 444         .info =                 (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
 445                                  SNDRV_PCM_INFO_BLOCK_TRANSFER |
 446                                  SNDRV_PCM_INFO_MMAP_VALID),
 447         .formats =              SNDRV_PCM_FMTBIT_S16_LE | \
 448                                 SNDRV_PCM_FMTBIT_S16_BE | \
 449                                 SNDRV_PCM_FMTBIT_S8 | \
 450                                 SNDRV_PCM_FMTBIT_U8 | \
 451                                 SNDRV_PCM_FMTBIT_U16_LE | \
 452                                 SNDRV_PCM_FMTBIT_U16_BE,
 453         .rates =                SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_48000,
 454         .rate_min =             32000,
 455         .rate_max =             48000,
 456         .channels_min =         1,
 457         .channels_max =         2,
 458         .buffer_bytes_max =     (256*1024),
 459         .period_bytes_min =     64,
 460         .period_bytes_max =     (256*1024),
 461         .periods_min =          2,
 462         .periods_max =          1024,
 463 };
 464
 465 static void snd_card_saa7134_runtime_free(struct snd_pcm_runtime *runtime)
 466 {
 467         snd_card_saa7134_pcm_t *pcm = runtime->private_data;
 468
 469         kfree(pcm);
 470 }
 471
 472
 473 /*
 474  * ALSA hardware params
 475  *
 476  *   - One of the ALSA capture callbacks.
 477  *
 478  *   Called on initialization, right before the PCM preparation
 479  *
 480  */
 481
 482 static int snd_card_saa7134_hw_params(struct snd_pcm_substream * substream,
 483                                       struct snd_pcm_hw_params * hw_params)
 484 {
 485         snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
 486         struct saa7134_dev *dev;
 487         unsigned int period_size, periods;
 488         int err;
 489
 490         period_size = params_period_bytes(hw_params);
 491         periods = params_periods(hw_params);
 492
 493         snd_assert(period_size >= 0x100 && period_size <= 0x10000,
 494                    return -EINVAL);
 495         snd_assert(periods >= 2, return -EINVAL);
 496         snd_assert(period_size * periods <= 1024 * 1024, return -EINVAL);
 497
 498         dev = saa7134->dev;
 499
 500         if (dev->dmasound.blocks == periods &&
 501             dev->dmasound.blksize == period_size)
 502                 return 0;
 503
 504         /* release the old buffer */
 505         if (substream->runtime->dma_area) {
 506                 saa7134_pgtable_free(dev->pci, &dev->dmasound.pt);
 507                 videobuf_pci_dma_unmap(dev->pci, &dev->dmasound.dma);
 508                 dsp_buffer_free(dev);
 509                 substream->runtime->dma_area = NULL;
 510         }
 511         dev->dmasound.blocks  = periods;
 512         dev->dmasound.blksize = period_size;
 513         dev->dmasound.bufsize = period_size * periods;
 514
 515         err = dsp_buffer_init(dev);
 516         if (0 != err) {
 517                 dev->dmasound.blocks  = 0;
 518                 dev->dmasound.blksize = 0;
 519                 dev->dmasound.bufsize = 0;
 520                 return err;
 521         }
 522
 523         if (0 != (err = videobuf_pci_dma_map(dev->pci, &dev->dmasound.dma))) {
 524                 dsp_buffer_free(dev);
 525                 return err;
 526         }
 527         if (0 != (err = saa7134_pgtable_alloc(dev->pci,&dev->dmasound.pt))) {
 528                 videobuf_pci_dma_unmap(dev->pci, &dev->dmasound.dma);
 529                 dsp_buffer_free(dev);
 530                 return err;
 531         }
 532         if (0 != (err = saa7134_pgtable_build(dev->pci,&dev->dmasound.pt,
 533                                                 dev->dmasound.dma.sglist,
 534                                                 dev->dmasound.dma.sglen,
 535                                                 0))) {
 536                 saa7134_pgtable_free(dev->pci, &dev->dmasound.pt);
 537                 videobuf_pci_dma_unmap(dev->pci, &dev->dmasound.dma);
 538                 dsp_buffer_free(dev);
 539                 return err;
 540         }
 541
 542         /* I should be able to use runtime->dma_addr in the control
 543            byte, but it doesn't work. So I allocate the DMA using the
 544            V4L functions, and force ALSA to use that as the DMA area */
 545
 546         substream->runtime->dma_area = dev->dmasound.dma.vmalloc;
 547
 548         return 1;
 549
 550 }
 551
 552 /*
 553  * ALSA hardware release
 554  *
 555  *   - One of the ALSA capture callbacks.
 556  *
 557  *   Called after closing the device, but before snd_card_saa7134_capture_close
 558  *   It stops the DMA audio and releases the buffers.
 559  *
 560  */
 561
 562 static int snd_card_saa7134_hw_free(struct snd_pcm_substream * substream)
 563 {
 564         snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
 565         struct saa7134_dev *dev;
 566
 567         dev = saa7134->dev;
 568
 569         if (substream->runtime->dma_area) {
 570                 saa7134_pgtable_free(dev->pci, &dev->dmasound.pt);
 571                 videobuf_pci_dma_unmap(dev->pci, &dev->dmasound.dma);
 572                 dsp_buffer_free(dev);
 573                 substream->runtime->dma_area = NULL;
 574         }
 575
 576         return 0;
 577 }
 578
 579 /*
 580  * ALSA capture finish
 581  *
 582  *   - One of the ALSA capture callbacks.
 583  *
 584  *   Called after closing the device.
 585  *
 586  */
 587
 588 static int snd_card_saa7134_capture_close(struct snd_pcm_substream * substream)
 589 {
 590         snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
 591         struct saa7134_dev *dev = saa7134->dev;
 592
 593         if (saa7134->mute_was_on) {
 594                 dev->ctl_mute = 1;
 595                 saa7134_tvaudio_setmute(dev);
 596         }
 597         return 0;
 598 }
 599
 600 /*
 601  * ALSA capture start
 602  *
 603  *   - One of the ALSA capture callbacks.
 604  *
 605  *   Called when opening the device. It creates and populates the PCM
 606  *  structure
 607  *
 608  */
 609
 610 static int snd_card_saa7134_capture_open(struct snd_pcm_substream * substream)
 611 {
 612         struct snd_pcm_runtime *runtime = substream->runtime;
 613         snd_card_saa7134_pcm_t *pcm;
 614         snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
 615         struct saa7134_dev *dev = saa7134->dev;
 616         int amux, err;
 617
 618         mutex_lock(&dev->dmasound.lock);
 619
 620         dev->dmasound.read_count  = 0;
 621         dev->dmasound.read_offset = 0;
 622
 623         amux = dev->input->amux;
 624         if ((amux < 1) || (amux > 3))
 625                 amux = 1;
 626         dev->dmasound.input  =  amux - 1;
 627
 628         mutex_unlock(&dev->dmasound.lock);
 629
 630         pcm = kzalloc(sizeof(*pcm), GFP_KERNEL);
 631         if (pcm == NULL)
 632                 return -ENOMEM;
 633
 634         pcm->dev=saa7134->dev;
 635
 636         spin_lock_init(&pcm->lock);
 637
 638         pcm->substream = substream;
 639         runtime->private_data = pcm;
 640         runtime->private_free = snd_card_saa7134_runtime_free;
 641         runtime->hw = snd_card_saa7134_capture;
 642
 643         if (dev->ctl_mute != 0) {
 644                 saa7134->mute_was_on = 1;
 645                 dev->ctl_mute = 0;
 646                 saa7134_tvaudio_setmute(dev);
 647         }
 648
 649         if ((err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
 650                 return err;
 651
 652         return 0;
 653 }
 654
 655 /*
 656  * ALSA capture callbacks definition
 657  */
 658
 659 static struct snd_pcm_ops snd_card_saa7134_capture_ops = {
 660         .open =                 snd_card_saa7134_capture_open,
 661         .close =                snd_card_saa7134_capture_close,
 662         .ioctl =                snd_pcm_lib_ioctl,
 663         .hw_params =            snd_card_saa7134_hw_params,
 664         .hw_free =              snd_card_saa7134_hw_free,
 665         .prepare =              snd_card_saa7134_capture_prepare,
 666         .trigger =              snd_card_saa7134_capture_trigger,
 667         .pointer =              snd_card_saa7134_capture_pointer,
 668 };
 669
 670 /*
 671  * ALSA PCM setup
 672  *
 673  *   Called when initializing the board. Sets up the name and hooks up
 674  *  the callbacks
 675  *
 676  */
 677
 678 static int snd_card_saa7134_pcm(snd_card_saa7134_t *saa7134, int device)
 679 {
 680         struct snd_pcm *pcm;
 681         int err;
 682
 683         if ((err = snd_pcm_new(saa7134->card, "SAA7134 PCM", device, 0, 1, &pcm)) < 0)
 684                 return err;
 685         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_card_saa7134_capture_ops);
 686         pcm->private_data = saa7134;
 687         pcm->info_flags = 0;
 688         strcpy(pcm->name, "SAA7134 PCM");
 689         return 0;
 690 }
 691
 692 #define SAA713x_VOLUME(xname, xindex, addr) \
 693 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
 694   .info = snd_saa7134_volume_info, \
 695   .get = snd_saa7134_volume_get, .put = snd_saa7134_volume_put, \
 696   .private_value = addr }
 697
 698 static int snd_saa7134_volume_info(struct snd_kcontrol * kcontrol,
 699                                    struct snd_ctl_elem_info * uinfo)
 700 {
 701         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 702         uinfo->count = 2;
 703         uinfo->value.integer.min = 0;
 704         uinfo->value.integer.max = 20;
 705         return 0;
 706 }
 707
 708 static int snd_saa7134_volume_get(struct snd_kcontrol * kcontrol,
 709                                   struct snd_ctl_elem_value * ucontrol)
 710 {
 711         snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol);
 712         int addr = kcontrol->private_value;
 713
 714         ucontrol->value.integer.value[0] = chip->mixer_volume[addr][0];
 715         ucontrol->value.integer.value[1] = chip->mixer_volume[addr][1];
 716         return 0;
 717 }
 718
 719 static int snd_saa7134_volume_put(struct snd_kcontrol * kcontrol,
 720                                   struct snd_ctl_elem_value * ucontrol)
 721 {
 722         snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol);
 723         struct saa7134_dev *dev = chip->dev;
 724
 725         int change, addr = kcontrol->private_value;
 726         int left, right;
 727
 728         left = ucontrol->value.integer.value[0];
 729         if (left < 0)
 730                 left = 0;
 731         if (left > 20)
 732                 left = 20;
 733         right = ucontrol->value.integer.value[1];
 734         if (right < 0)
 735                 right = 0;
 736         if (right > 20)
 737                 right = 20;
 738         spin_lock_irq(&chip->mixer_lock);
 739         change = 0;
 740         if (chip->mixer_volume[addr][0] != left) {
 741                 change = 1;
 742                 right = left;
 743         }
 744         if (chip->mixer_volume[addr][1] != right) {
 745                 change = 1;
 746                 left = right;
 747         }
 748         if (change) {
 749                 switch (dev->pci->device) {
 750                         case PCI_DEVICE_ID_PHILIPS_SAA7134:
 751                                 switch (addr) {
 752                                         case MIXER_ADDR_TVTUNER:
 753                                                 left = 20;
 754                                                 break;
 755                                         case MIXER_ADDR_LINE1:
 756                                                 saa_andorb(SAA7134_ANALOG_IO_SELECT,  0x10,
 757                                                            (left > 10) ? 0x00 : 0x10);
 758                                                 break;
 759                                         case MIXER_ADDR_LINE2:
 760                                                 saa_andorb(SAA7134_ANALOG_IO_SELECT,  0x20,
 761                                                            (left > 10) ? 0x00 : 0x20);
 762                                                 break;
 763                                 }
 764                                 break;
 765                         case PCI_DEVICE_ID_PHILIPS_SAA7133:
 766                         case PCI_DEVICE_ID_PHILIPS_SAA7135:
 767                                 switch (addr) {
 768                                         case MIXER_ADDR_TVTUNER:
 769                                                 left = 20;
 770                                                 break;
 771                                         case MIXER_ADDR_LINE1:
 772                                                 saa_andorb(0x0594,  0x10,
 773                                                            (left > 10) ? 0x00 : 0x10);
 774                                                 break;
 775                                         case MIXER_ADDR_LINE2:
 776                                                 saa_andorb(0x0594,  0x20,
 777                                                            (left > 10) ? 0x00 : 0x20);
 778                                                 break;
 779                                 }
 780                                 break;
 781                 }
 782                 chip->mixer_volume[addr][0] = left;
 783                 chip->mixer_volume[addr][1] = right;
 784         }
 785         spin_unlock_irq(&chip->mixer_lock);
 786         return change;
 787 }
 788
 789 #define SAA713x_CAPSRC(xname, xindex, addr) \
 790 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
 791   .info = snd_saa7134_capsrc_info, \
 792   .get = snd_saa7134_capsrc_get, .put = snd_saa7134_capsrc_put, \
 793   .private_value = addr }
 794
 795 static int snd_saa7134_capsrc_info(struct snd_kcontrol * kcontrol,
 796                                    struct snd_ctl_elem_info * uinfo)
 797 {
 798         uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
 799         uinfo->count = 2;
 800         uinfo->value.integer.min = 0;
 801         uinfo->value.integer.max = 1;
 802         return 0;
 803 }
 804
 805 static int snd_saa7134_capsrc_get(struct snd_kcontrol * kcontrol,
 806                                   struct snd_ctl_elem_value * ucontrol)
 807 {
 808         snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol);
 809         int addr = kcontrol->private_value;
 810
 811         spin_lock_irq(&chip->mixer_lock);
 812         ucontrol->value.integer.value[0] = chip->capture_source[addr][0];
 813         ucontrol->value.integer.value[1] = chip->capture_source[addr][1];
 814         spin_unlock_irq(&chip->mixer_lock);
 815
 816         return 0;
 817 }
 818
 819 static int snd_saa7134_capsrc_put(struct snd_kcontrol * kcontrol,
 820                                   struct snd_ctl_elem_value * ucontrol)
 821 {
 822         snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol);
 823         int change, addr = kcontrol->private_value;
 824         int left, right;
 825         u32 anabar, xbarin;
 826         int analog_io, rate;
 827         struct saa7134_dev *dev;
 828
 829         dev = chip->dev;
 830
 831         left = ucontrol->value.integer.value[0] & 1;
 832         right = ucontrol->value.integer.value[1] & 1;
 833         spin_lock_irq(&chip->mixer_lock);
 834
 835         change = chip->capture_source[addr][0] != left ||
 836                  chip->capture_source[addr][1] != right;
 837         chip->capture_source[addr][0] = left;
 838         chip->capture_source[addr][1] = right;
 839         dev->dmasound.input=addr;
 840         spin_unlock_irq(&chip->mixer_lock);
 841
 842
 843         if (change) {
 844           switch (dev->pci->device) {
 845
 846            case PCI_DEVICE_ID_PHILIPS_SAA7134:
 847                 switch (addr) {
 848                         case MIXER_ADDR_TVTUNER:
 849                                 saa_andorb(SAA7134_AUDIO_FORMAT_CTRL, 0xc0, 0xc0);
 850                                 saa_andorb(SAA7134_SIF_SAMPLE_FREQ,   0x03, 0x00);
 851                                 break;
 852                         case MIXER_ADDR_LINE1:
 853                         case MIXER_ADDR_LINE2:
 854                                 analog_io = (MIXER_ADDR_LINE1 == addr) ? 0x00 : 0x08;
 855                                 rate = (32000 == dev->dmasound.rate) ? 0x01 : 0x03;
 856                                 saa_andorb(SAA7134_ANALOG_IO_SELECT,  0x08, analog_io);
 857                                 saa_andorb(SAA7134_AUDIO_FORMAT_CTRL, 0xc0, 0x80);
 858                                 saa_andorb(SAA7134_SIF_SAMPLE_FREQ,   0x03, rate);
 859                                 break;
 860                 }
 861
 862                 break;
 863            case PCI_DEVICE_ID_PHILIPS_SAA7133:
 864            case PCI_DEVICE_ID_PHILIPS_SAA7135:
 865                 xbarin = 0x03; // adc
 866                 anabar = 0;
 867                 switch (addr) {
 868                         case MIXER_ADDR_TVTUNER:
 869                                 xbarin = 0; // Demodulator
 870                                 anabar = 2; // DACs
 871                                 break;
 872                         case MIXER_ADDR_LINE1:
 873                                 anabar = 0;  // aux1, aux1
 874                                 break;
 875                         case MIXER_ADDR_LINE2:
 876                                 anabar = 9;  // aux2, aux2
 877                                 break;
 878                 }
 879
 880                 /* output xbar always main channel */
 881                 saa_dsp_writel(dev, SAA7133_DIGITAL_OUTPUT_SEL1, 0xbbbb10);
 882
 883                 if (left || right) { // We've got data, turn the input on
 884                   saa_dsp_writel(dev, SAA7133_DIGITAL_INPUT_XBAR1, xbarin);
 885                   saa_writel(SAA7133_ANALOG_IO_SELECT, anabar);
 886                 } else {
 887                   saa_dsp_writel(dev, SAA7133_DIGITAL_INPUT_XBAR1, 0);
 888                   saa_writel(SAA7133_ANALOG_IO_SELECT, 0);
 889                 }
 890                 break;
 891           }
 892         }
 893
 894         return change;
 895 }
 896
 897 static struct snd_kcontrol_new snd_saa7134_controls[] = {
 898 SAA713x_VOLUME("Video Volume", 0, MIXER_ADDR_TVTUNER),
 899 SAA713x_CAPSRC("Video Capture Switch", 0, MIXER_ADDR_TVTUNER),
 900 SAA713x_VOLUME("Line Volume", 1, MIXER_ADDR_LINE1),
 901 SAA713x_CAPSRC("Line Capture Switch", 1, MIXER_ADDR_LINE1),
 902 SAA713x_VOLUME("Line Volume", 2, MIXER_ADDR_LINE2),
 903 SAA713x_CAPSRC("Line Capture Switch", 2, MIXER_ADDR_LINE2),
 904 };
 905
 906 /*
 907  * ALSA mixer setup
 908  *
 909  *   Called when initializing the board. Sets up the name and hooks up
 910  *  the callbacks
 911  *
 912  */
 913
 914 static int snd_card_saa7134_new_mixer(snd_card_saa7134_t * chip)
 915 {
 916         struct snd_card *card = chip->card;
 917         unsigned int idx;
 918         int err;
 919
 920         snd_assert(chip != NULL, return -EINVAL);
 921         strcpy(card->mixername, "SAA7134 Mixer");
 922
 923         for (idx = 0; idx < ARRAY_SIZE(snd_saa7134_controls); idx++) {
 924                 if ((err = snd_ctl_add(card, snd_ctl_new1(&snd_saa7134_controls[idx], chip))) < 0)
 925                         return err;
 926         }
 927         return 0;
 928 }
 929
 930 static void snd_saa7134_free(struct snd_card * card)
 931 {
 932         snd_card_saa7134_t *chip = card->private_data;
 933
 934         if (chip->dev->dmasound.priv_data == NULL)
 935                 return;
 936
 937         if (chip->irq >= 0) {
 938                 synchronize_irq(chip->irq);
 939                 free_irq(chip->irq, &chip->dev->dmasound);
 940         }
 941
 942         chip->dev->dmasound.priv_data = NULL;
 943
 944 }
 945
 946 /*
 947  * ALSA initialization
 948  *
 949  *   Called by the init routine, once for each saa7134 device present,
 950  *  it creates the basic structures and registers the ALSA devices
 951  *
 952  */
 953
 954 static int alsa_card_saa7134_create(struct saa7134_dev *dev, int devnum)
 955 {
 956
 957         struct snd_card *card;
 958         snd_card_saa7134_t *chip;
 959         int err;
 960
 961
 962         if (devnum >= SNDRV_CARDS)
 963                 return -ENODEV;
 964         if (!enable[devnum])
 965                 return -ENODEV;
 966
 967         card = snd_card_new(index[devnum], id[devnum], THIS_MODULE, sizeof(snd_card_saa7134_t));
 968
 969         if (card == NULL)
 970                 return -ENOMEM;
 971
 972         strcpy(card->driver, "SAA7134");
 973
 974         /* Card "creation" */
 975
 976         card->private_free = snd_saa7134_free;
 977         chip = (snd_card_saa7134_t *) card->private_data;
 978
 979         spin_lock_init(&chip->lock);
 980         spin_lock_init(&chip->mixer_lock);
 981
 982         chip->dev = dev;
 983
 984         chip->card = card;
 985
 986         chip->pci = dev->pci;
 987         chip->iobase = pci_resource_start(dev->pci, 0);
 988
 989
 990         err = request_irq(dev->pci->irq, saa7134_alsa_irq,
 991                                 IRQF_SHARED | IRQF_DISABLED, dev->name,
 992                                 (void*) &dev->dmasound);
 993
 994         if (err < 0) {
 995                 printk(KERN_ERR "%s: can't get IRQ %d for ALSA\n",
 996                         dev->name, dev->pci->irq);
 997                 goto __nodev;
 998         }
 999
1000         chip->irq = dev->pci->irq;
1001
1002         mutex_init(&dev->dmasound.lock);
1003
1004         if ((err = snd_card_saa7134_new_mixer(chip)) < 0)
1005                 goto __nodev;
1006
1007         if ((err = snd_card_saa7134_pcm(chip, 0)) < 0)
1008                 goto __nodev;
1009
1010         snd_card_set_dev(card, &chip->pci->dev);
1011
1012         /* End of "creation" */
1013
1014         strcpy(card->shortname, "SAA7134");
1015         sprintf(card->longname, "%s at 0x%lx irq %d",
1016                 chip->dev->name, chip->iobase, chip->irq);
1017
1018         printk(KERN_INFO "%s/alsa: %s registered as card %d\n",dev->name,card->longname,index[devnum]);
1019
1020         if ((err = snd_card_register(card)) == 0) {
1021                 snd_saa7134_cards[devnum] = card;
1022                 return 0;
1023         }
1024
1025 __nodev:
1026         snd_card_free(card);
1027         return err;
1028 }
1029
1030
1031 static int alsa_device_init(struct saa7134_dev *dev)
1032 {
1033         dev->dmasound.priv_data = dev;
1034         alsa_card_saa7134_create(dev,dev->nr);
1035         return 1;
1036 }
1037
1038 static int alsa_device_exit(struct saa7134_dev *dev)
1039 {
1040
1041         snd_card_free(snd_saa7134_cards[dev->nr]);
1042         snd_saa7134_cards[dev->nr] = NULL;
1043         return 1;
1044 }
1045
1046 /*
1047  * Module initializer
1048  *
1049  * Loops through present saa7134 cards, and assigns an ALSA device
1050  * to each one
1051  *
1052  */
1053
1054 static int saa7134_alsa_init(void)
1055 {
1056         struct saa7134_dev *dev = NULL;
1057         struct list_head *list;
1058
1059         if (!saa7134_dmasound_init && !saa7134_dmasound_exit) {
1060                 saa7134_dmasound_init = alsa_device_init;
1061                 saa7134_dmasound_exit = alsa_device_exit;
1062         } else {
1063                 printk(KERN_WARNING "saa7134 ALSA: can't load, DMA sound handler already assigned (probably to OSS)\n");
1064                 return -EBUSY;
1065         }
1066
1067         printk(KERN_INFO "saa7134 ALSA driver for DMA sound loaded\n");
1068
1069         list_for_each(list,&saa7134_devlist) {
1070                 dev = list_entry(list, struct saa7134_dev, devlist);
1071                 if (dev->dmasound.priv_data == NULL) {
1072                         alsa_device_init(dev);
1073                 } else {
1074                         printk(KERN_ERR "saa7134 ALSA: DMA sound is being handled by OSS. ignoring %s\n",dev->name);
1075                         return -EBUSY;
1076                 }
1077         }
1078
1079         if (dev == NULL)
1080                 printk(KERN_INFO "saa7134 ALSA: no saa7134 cards found\n");
1081
1082         return 0;
1083
1084 }
1085
1086 /*
1087  * Module destructor
1088  */
1089
1090 static void saa7134_alsa_exit(void)
1091 {
1092         int idx;
1093
1094         for (idx = 0; idx < SNDRV_CARDS; idx++) {
1095                 snd_card_free(snd_saa7134_cards[idx]);
1096         }
1097
1098         saa7134_dmasound_init = NULL;
1099         saa7134_dmasound_exit = NULL;
1100         printk(KERN_INFO "saa7134 ALSA driver for DMA sound unloaded\n");
1101
1102         return;
1103 }
1104
1105 /* We initialize this late, to make sure the sound system is up and running */
1106 late_initcall(saa7134_alsa_init);
1107 module_exit(saa7134_alsa_exit);
1108 MODULE_LICENSE("GPL");
1109 MODULE_AUTHOR("Ricardo Cerqueira");
1110
1111
1112