drivers/media/pci/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  */
  14
  15 #include "saa7134.h"
  16 #include "saa7134-reg.h"
  17
  18 #include <linux/init.h>
  19 #include <linux/slab.h>
  20 #include <linux/time.h>
  21 #include <linux/wait.h>
  22 #include <linux/module.h>
  23 #include <sound/core.h>
  24 #include <sound/control.h>
  25 #include <sound/pcm.h>
  26 #include <sound/pcm_params.h>
  27 #include <sound/initval.h>
  28 #include <linux/interrupt.h>
  29 #include <linux/vmalloc.h>
  30
  31 /*
  32  * Configuration macros
  33  */
  34
  35 /* defaults */
  36 #define MIXER_ADDR_UNSELECTED   -1
  37 #define MIXER_ADDR_TVTUNER      0
  38 #define MIXER_ADDR_LINE1        1
  39 #define MIXER_ADDR_LINE2        2
  40 #define MIXER_ADDR_LAST         2
  41
  42
  43 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;      /* Index 0-MAX */
  44 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;       /* ID for this card */
  45 static int enable[SNDRV_CARDS] = {1, [1 ... (SNDRV_CARDS - 1)] = 1};
  46
  47 module_param_array(index, int, NULL, 0444);
  48 module_param_array(enable, int, NULL, 0444);
  49 MODULE_PARM_DESC(index, "Index value for SAA7134 capture interface(s).");
  50 MODULE_PARM_DESC(enable, "Enable (or not) the SAA7134 capture interface(s).");
  51
  52 /*
  53  * Main chip structure
  54  */
  55
  56 typedef struct snd_card_saa7134 {
  57         struct snd_card *card;
  58         spinlock_t mixer_lock;
  59         int mixer_volume[MIXER_ADDR_LAST+1][2];
  60         int capture_source_addr;
  61         int capture_source[2];
  62         struct snd_kcontrol *capture_ctl[MIXER_ADDR_LAST+1];
  63         struct pci_dev *pci;
  64         struct saa7134_dev *dev;
  65
  66         unsigned long iobase;
  67         s16 irq;
  68         u16 mute_was_on;
  69
  70         spinlock_t lock;
  71 } snd_card_saa7134_t;
  72
  73
  74 /*
  75  * PCM structure
  76  */
  77
  78 typedef struct snd_card_saa7134_pcm {
  79         struct saa7134_dev *dev;
  80
  81         spinlock_t lock;
  82
  83         struct snd_pcm_substream *substream;
  84 } snd_card_saa7134_pcm_t;
  85
  86 static struct snd_card *snd_saa7134_cards[SNDRV_CARDS];
  87
  88
  89 /*
  90  * saa7134 DMA audio stop
  91  *
  92  *   Called when the capture device is released or the buffer overflows
  93  *
  94  *   - Copied verbatim from saa7134-oss's dsp_dma_stop.
  95  *
  96  */
  97
  98 static void saa7134_dma_stop(struct saa7134_dev *dev)
  99 {
 100         dev->dmasound.dma_blk     = -1;
 101         dev->dmasound.dma_running = 0;
 102         saa7134_set_dmabits(dev);
 103 }
 104
 105 /*
 106  * saa7134 DMA audio start
 107  *
 108  *   Called when preparing the capture device for use
 109  *
 110  *   - Copied verbatim from saa7134-oss's dsp_dma_start.
 111  *
 112  */
 113
 114 static void saa7134_dma_start(struct saa7134_dev *dev)
 115 {
 116         dev->dmasound.dma_blk     = 0;
 117         dev->dmasound.dma_running = 1;
 118         saa7134_set_dmabits(dev);
 119 }
 120
 121 /*
 122  * saa7134 audio DMA IRQ handler
 123  *
 124  *   Called whenever we get an SAA7134_IRQ_REPORT_DONE_RA3 interrupt
 125  *   Handles shifting between the 2 buffers, manages the read counters,
 126  *  and notifies ALSA when periods elapse
 127  *
 128  *   - Mostly copied from saa7134-oss's saa7134_irq_oss_done.
 129  *
 130  */
 131
 132 static void saa7134_irq_alsa_done(struct saa7134_dev *dev,
 133                                   unsigned long status)
 134 {
 135         int next_blk, reg = 0;
 136
 137         spin_lock(&dev->slock);
 138         if (UNSET == dev->dmasound.dma_blk) {
 139                 pr_debug("irq: recording stopped\n");
 140                 goto done;
 141         }
 142         if (0 != (status & 0x0f000000))
 143                 pr_debug("irq: lost %ld\n", (status >> 24) & 0x0f);
 144         if (0 == (status & 0x10000000)) {
 145                 /* odd */
 146                 if (0 == (dev->dmasound.dma_blk & 0x01))
 147                         reg = SAA7134_RS_BA1(6);
 148         } else {
 149                 /* even */
 150                 if (1 == (dev->dmasound.dma_blk & 0x01))
 151                         reg = SAA7134_RS_BA2(6);
 152         }
 153         if (0 == reg) {
 154                 pr_debug("irq: field oops [%s]\n",
 155                         (status & 0x10000000) ? "even" : "odd");
 156                 goto done;
 157         }
 158
 159         if (dev->dmasound.read_count >= dev->dmasound.blksize * (dev->dmasound.blocks-2)) {
 160                 pr_debug("irq: overrun [full=%d/%d] - Blocks in %d\n",
 161                         dev->dmasound.read_count,
 162                         dev->dmasound.bufsize, dev->dmasound.blocks);
 163                 spin_unlock(&dev->slock);
 164                 snd_pcm_stop_xrun(dev->dmasound.substream);
 165                 return;
 166         }
 167
 168         /* next block addr */
 169         next_blk = (dev->dmasound.dma_blk + 2) % dev->dmasound.blocks;
 170         saa_writel(reg,next_blk * dev->dmasound.blksize);
 171         pr_debug("irq: ok, %s, next_blk=%d, addr=%x, blocks=%u, size=%u, read=%u\n",
 172                 (status & 0x10000000) ? "even" : "odd ", next_blk,
 173                  next_blk * dev->dmasound.blksize, dev->dmasound.blocks,
 174                  dev->dmasound.blksize, dev->dmasound.read_count);
 175
 176         /* update status & wake waiting readers */
 177         dev->dmasound.dma_blk = (dev->dmasound.dma_blk + 1) % dev->dmasound.blocks;
 178         dev->dmasound.read_count += dev->dmasound.blksize;
 179
 180         dev->dmasound.recording_on = reg;
 181
 182         if (dev->dmasound.read_count >= snd_pcm_lib_period_bytes(dev->dmasound.substream)) {
 183                 spin_unlock(&dev->slock);
 184                 snd_pcm_period_elapsed(dev->dmasound.substream);
 185                 spin_lock(&dev->slock);
 186         }
 187
 188  done:
 189         spin_unlock(&dev->slock);
 190
 191 }
 192
 193 /*
 194  * IRQ request handler
 195  *
 196  *   Runs along with saa7134's IRQ handler, discards anything that isn't
 197  *   DMA sound
 198  *
 199  */
 200
 201 static irqreturn_t saa7134_alsa_irq(int irq, void *dev_id)
 202 {
 203         struct saa7134_dmasound *dmasound = dev_id;
 204         struct saa7134_dev *dev = dmasound->priv_data;
 205
 206         unsigned long report, status;
 207         int loop, handled = 0;
 208
 209         for (loop = 0; loop < 10; loop++) {
 210                 report = saa_readl(SAA7134_IRQ_REPORT);
 211                 status = saa_readl(SAA7134_IRQ_STATUS);
 212
 213                 if (report & SAA7134_IRQ_REPORT_DONE_RA3) {
 214                         handled = 1;
 215                         saa_writel(SAA7134_IRQ_REPORT,
 216                                    SAA7134_IRQ_REPORT_DONE_RA3);
 217                         saa7134_irq_alsa_done(dev, status);
 218                 } else {
 219                         goto out;
 220                 }
 221         }
 222
 223         if (loop == 10) {
 224                 pr_debug("error! looping IRQ!");
 225         }
 226
 227 out:
 228         return IRQ_RETVAL(handled);
 229 }
 230
 231 /*
 232  * ALSA capture trigger
 233  *
 234  *   - One of the ALSA capture callbacks.
 235  *
 236  *   Called whenever a capture is started or stopped. Must be defined,
 237  *   but there's nothing we want to do here
 238  *
 239  */
 240
 241 static int snd_card_saa7134_capture_trigger(struct snd_pcm_substream * substream,
 242                                           int cmd)
 243 {
 244         struct snd_pcm_runtime *runtime = substream->runtime;
 245         snd_card_saa7134_pcm_t *pcm = runtime->private_data;
 246         struct saa7134_dev *dev=pcm->dev;
 247         int err = 0;
 248
 249         spin_lock(&dev->slock);
 250         if (cmd == SNDRV_PCM_TRIGGER_START) {
 251                 /* start dma */
 252                 saa7134_dma_start(dev);
 253         } else if (cmd == SNDRV_PCM_TRIGGER_STOP) {
 254                 /* stop dma */
 255                 saa7134_dma_stop(dev);
 256         } else {
 257                 err = -EINVAL;
 258         }
 259         spin_unlock(&dev->slock);
 260
 261         return err;
 262 }
 263
 264 static int saa7134_alsa_dma_init(struct saa7134_dev *dev, int nr_pages)
 265 {
 266         struct saa7134_dmasound *dma = &dev->dmasound;
 267         struct page *pg;
 268         int i;
 269
 270         dma->vaddr = vmalloc_32(nr_pages << PAGE_SHIFT);
 271         if (NULL == dma->vaddr) {
 272                 pr_debug("vmalloc_32(%d pages) failed\n", nr_pages);
 273                 return -ENOMEM;
 274         }
 275
 276         pr_debug("vmalloc is at addr 0x%08lx, size=%d\n",
 277                                 (unsigned long)dma->vaddr,
 278                                 nr_pages << PAGE_SHIFT);
 279
 280         memset(dma->vaddr, 0, nr_pages << PAGE_SHIFT);
 281         dma->nr_pages = nr_pages;
 282
 283         dma->sglist = vzalloc(dma->nr_pages * sizeof(*dma->sglist));
 284         if (NULL == dma->sglist)
 285                 goto vzalloc_err;
 286
 287         sg_init_table(dma->sglist, dma->nr_pages);
 288         for (i = 0; i < dma->nr_pages; i++) {
 289                 pg = vmalloc_to_page(dma->vaddr + i * PAGE_SIZE);
 290                 if (NULL == pg)
 291                         goto vmalloc_to_page_err;
 292                 sg_set_page(&dma->sglist[i], pg, PAGE_SIZE, 0);
 293         }
 294         return 0;
 295
 296 vmalloc_to_page_err:
 297         vfree(dma->sglist);
 298         dma->sglist = NULL;
 299 vzalloc_err:
 300         vfree(dma->vaddr);
 301         dma->vaddr = NULL;
 302         return -ENOMEM;
 303 }
 304
 305 static int saa7134_alsa_dma_map(struct saa7134_dev *dev)
 306 {
 307         struct saa7134_dmasound *dma = &dev->dmasound;
 308
 309         dma->sglen = dma_map_sg(&dev->pci->dev, dma->sglist,
 310                         dma->nr_pages, PCI_DMA_FROMDEVICE);
 311
 312         if (0 == dma->sglen) {
 313                 pr_warn("%s: saa7134_alsa_map_sg failed\n", __func__);
 314                 return -ENOMEM;
 315         }
 316         return 0;
 317 }
 318
 319 static int saa7134_alsa_dma_unmap(struct saa7134_dev *dev)
 320 {
 321         struct saa7134_dmasound *dma = &dev->dmasound;
 322
 323         if (!dma->sglen)
 324                 return 0;
 325
 326         dma_unmap_sg(&dev->pci->dev, dma->sglist, dma->sglen, PCI_DMA_FROMDEVICE);
 327         dma->sglen = 0;
 328         return 0;
 329 }
 330
 331 static int saa7134_alsa_dma_free(struct saa7134_dmasound *dma)
 332 {
 333         vfree(dma->sglist);
 334         dma->sglist = NULL;
 335         vfree(dma->vaddr);
 336         dma->vaddr = NULL;
 337         return 0;
 338 }
 339
 340 /*
 341  * DMA buffer initialization
 342  *
 343  *   Uses V4L functions to initialize the DMA. Shouldn't be necessary in
 344  *  ALSA, but I was unable to use ALSA's own DMA, and had to force the
 345  *  usage of V4L's
 346  *
 347  *   - Copied verbatim from saa7134-oss.
 348  *
 349  */
 350
 351 static int dsp_buffer_init(struct saa7134_dev *dev)
 352 {
 353         int err;
 354
 355         BUG_ON(!dev->dmasound.bufsize);
 356
 357         err = saa7134_alsa_dma_init(dev,
 358                                (dev->dmasound.bufsize + PAGE_SIZE) >> PAGE_SHIFT);
 359         if (0 != err)
 360                 return err;
 361         return 0;
 362 }
 363
 364 /*
 365  * DMA buffer release
 366  *
 367  *   Called after closing the device, during snd_card_saa7134_capture_close
 368  *
 369  */
 370
 371 static int dsp_buffer_free(struct saa7134_dev *dev)
 372 {
 373         BUG_ON(!dev->dmasound.blksize);
 374
 375         saa7134_alsa_dma_free(&dev->dmasound);
 376
 377         dev->dmasound.blocks  = 0;
 378         dev->dmasound.blksize = 0;
 379         dev->dmasound.bufsize = 0;
 380
 381         return 0;
 382 }
 383
 384 /*
 385  * Setting the capture source and updating the ALSA controls
 386  */
 387 static int snd_saa7134_capsrc_set(struct snd_kcontrol *kcontrol,
 388                                   int left, int right, bool force_notify)
 389 {
 390         snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol);
 391         int change = 0, addr = kcontrol->private_value;
 392         int active, old_addr;
 393         u32 anabar, xbarin;
 394         int analog_io, rate;
 395         struct saa7134_dev *dev;
 396
 397         dev = chip->dev;
 398
 399         spin_lock_irq(&chip->mixer_lock);
 400
 401         active = left != 0 || right != 0;
 402         old_addr = chip->capture_source_addr;
 403
 404         /* The active capture source cannot be deactivated */
 405         if (active) {
 406                 change = old_addr != addr ||
 407                          chip->capture_source[0] != left ||
 408                          chip->capture_source[1] != right;
 409
 410                 chip->capture_source[0] = left;
 411                 chip->capture_source[1] = right;
 412                 chip->capture_source_addr = addr;
 413                 dev->dmasound.input = addr;
 414         }
 415         spin_unlock_irq(&chip->mixer_lock);
 416
 417         if (change) {
 418                 switch (dev->pci->device) {
 419
 420                 case PCI_DEVICE_ID_PHILIPS_SAA7134:
 421                         switch (addr) {
 422                         case MIXER_ADDR_TVTUNER:
 423                                 saa_andorb(SAA7134_AUDIO_FORMAT_CTRL,
 424                                            0xc0, 0xc0);
 425                                 saa_andorb(SAA7134_SIF_SAMPLE_FREQ,
 426                                            0x03, 0x00);
 427                                 break;
 428                         case MIXER_ADDR_LINE1:
 429                         case MIXER_ADDR_LINE2:
 430                                 analog_io = (MIXER_ADDR_LINE1 == addr) ?
 431                                              0x00 : 0x08;
 432                                 rate = (32000 == dev->dmasound.rate) ?
 433                                         0x01 : 0x03;
 434                                 saa_andorb(SAA7134_ANALOG_IO_SELECT,
 435                                            0x08, analog_io);
 436                                 saa_andorb(SAA7134_AUDIO_FORMAT_CTRL,
 437                                            0xc0, 0x80);
 438                                 saa_andorb(SAA7134_SIF_SAMPLE_FREQ,
 439                                            0x03, rate);
 440                                 break;
 441                         }
 442
 443                         break;
 444                 case PCI_DEVICE_ID_PHILIPS_SAA7133:
 445                 case PCI_DEVICE_ID_PHILIPS_SAA7135:
 446                         xbarin = 0x03; /* adc */
 447                         anabar = 0;
 448                         switch (addr) {
 449                         case MIXER_ADDR_TVTUNER:
 450                                 xbarin = 0; /* Demodulator */
 451                                 anabar = 2; /* DACs */
 452                                 break;
 453                         case MIXER_ADDR_LINE1:
 454                                 anabar = 0;  /* aux1, aux1 */
 455                                 break;
 456                         case MIXER_ADDR_LINE2:
 457                                 anabar = 9;  /* aux2, aux2 */
 458                                 break;
 459                         }
 460
 461                         /* output xbar always main channel */
 462                         saa_dsp_writel(dev, SAA7133_DIGITAL_OUTPUT_SEL1,
 463                                        0xbbbb10);
 464
 465                         if (left || right) {
 466                                 /* We've got data, turn the input on */
 467                                 saa_dsp_writel(dev, SAA7133_DIGITAL_INPUT_XBAR1,
 468                                                xbarin);
 469                                 saa_writel(SAA7133_ANALOG_IO_SELECT, anabar);
 470                         } else {
 471                                 saa_dsp_writel(dev, SAA7133_DIGITAL_INPUT_XBAR1,
 472                                                0);
 473                                 saa_writel(SAA7133_ANALOG_IO_SELECT, 0);
 474                         }
 475                         break;
 476                 }
 477         }
 478
 479         if (change) {
 480                 if (force_notify)
 481                         snd_ctl_notify(chip->card,
 482                                        SNDRV_CTL_EVENT_MASK_VALUE,
 483                                        &chip->capture_ctl[addr]->id);
 484
 485                 if (old_addr != MIXER_ADDR_UNSELECTED && old_addr != addr)
 486                         snd_ctl_notify(chip->card,
 487                                        SNDRV_CTL_EVENT_MASK_VALUE,
 488                                        &chip->capture_ctl[old_addr]->id);
 489         }
 490
 491         return change;
 492 }
 493
 494 /*
 495  * ALSA PCM preparation
 496  *
 497  *   - One of the ALSA capture callbacks.
 498  *
 499  *   Called right after the capture device is opened, this function configures
 500  *  the buffer using the previously defined functions, allocates the memory,
 501  *  sets up the hardware registers, and then starts the DMA. When this function
 502  *  returns, the audio should be flowing.
 503  *
 504  */
 505
 506 static int snd_card_saa7134_capture_prepare(struct snd_pcm_substream * substream)
 507 {
 508         struct snd_pcm_runtime *runtime = substream->runtime;
 509         int bswap, sign;
 510         u32 fmt, control;
 511         snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
 512         struct saa7134_dev *dev;
 513         snd_card_saa7134_pcm_t *pcm = runtime->private_data;
 514
 515         pcm->dev->dmasound.substream = substream;
 516
 517         dev = saa7134->dev;
 518
 519         if (snd_pcm_format_width(runtime->format) == 8)
 520                 fmt = 0x00;
 521         else
 522                 fmt = 0x01;
 523
 524         if (snd_pcm_format_signed(runtime->format))
 525                 sign = 1;
 526         else
 527                 sign = 0;
 528
 529         if (snd_pcm_format_big_endian(runtime->format))
 530                 bswap = 1;
 531         else
 532                 bswap = 0;
 533
 534         switch (dev->pci->device) {
 535           case PCI_DEVICE_ID_PHILIPS_SAA7134:
 536                 if (1 == runtime->channels)
 537                         fmt |= (1 << 3);
 538                 if (2 == runtime->channels)
 539                         fmt |= (3 << 3);
 540                 if (sign)
 541                         fmt |= 0x04;
 542
 543                 fmt |= (MIXER_ADDR_TVTUNER == dev->dmasound.input) ? 0xc0 : 0x80;
 544                 saa_writeb(SAA7134_NUM_SAMPLES0, ((dev->dmasound.blksize - 1) & 0x0000ff));
 545                 saa_writeb(SAA7134_NUM_SAMPLES1, ((dev->dmasound.blksize - 1) & 0x00ff00) >>  8);
 546                 saa_writeb(SAA7134_NUM_SAMPLES2, ((dev->dmasound.blksize - 1) & 0xff0000) >> 16);
 547                 saa_writeb(SAA7134_AUDIO_FORMAT_CTRL, fmt);
 548
 549                 break;
 550           case PCI_DEVICE_ID_PHILIPS_SAA7133:
 551           case PCI_DEVICE_ID_PHILIPS_SAA7135:
 552                 if (1 == runtime->channels)
 553                         fmt |= (1 << 4);
 554                 if (2 == runtime->channels)
 555                         fmt |= (2 << 4);
 556                 if (!sign)
 557                         fmt |= 0x04;
 558                 saa_writel(SAA7133_NUM_SAMPLES, dev->dmasound.blksize -1);
 559                 saa_writel(SAA7133_AUDIO_CHANNEL, 0x543210 | (fmt << 24));
 560                 break;
 561         }
 562
 563         pr_debug("rec_start: afmt=%d ch=%d  =>  fmt=0x%x swap=%c\n",
 564                 runtime->format, runtime->channels, fmt,
 565                 bswap ? 'b' : '-');
 566         /* dma: setup channel 6 (= AUDIO) */
 567         control = SAA7134_RS_CONTROL_BURST_16 |
 568                 SAA7134_RS_CONTROL_ME |
 569                 (dev->dmasound.pt.dma >> 12);
 570         if (bswap)
 571                 control |= SAA7134_RS_CONTROL_BSWAP;
 572
 573         saa_writel(SAA7134_RS_BA1(6),0);
 574         saa_writel(SAA7134_RS_BA2(6),dev->dmasound.blksize);
 575         saa_writel(SAA7134_RS_PITCH(6),0);
 576         saa_writel(SAA7134_RS_CONTROL(6),control);
 577
 578         dev->dmasound.rate = runtime->rate;
 579
 580         /* Setup and update the card/ALSA controls */
 581         snd_saa7134_capsrc_set(saa7134->capture_ctl[dev->dmasound.input], 1, 1,
 582                                true);
 583
 584         return 0;
 585
 586 }
 587
 588 /*
 589  * ALSA pointer fetching
 590  *
 591  *   - One of the ALSA capture callbacks.
 592  *
 593  *   Called whenever a period elapses, it must return the current hardware
 594  *  position of the buffer.
 595  *   Also resets the read counter used to prevent overruns
 596  *
 597  */
 598
 599 static snd_pcm_uframes_t
 600 snd_card_saa7134_capture_pointer(struct snd_pcm_substream * substream)
 601 {
 602         struct snd_pcm_runtime *runtime = substream->runtime;
 603         snd_card_saa7134_pcm_t *pcm = runtime->private_data;
 604         struct saa7134_dev *dev=pcm->dev;
 605
 606         if (dev->dmasound.read_count) {
 607                 dev->dmasound.read_count  -= snd_pcm_lib_period_bytes(substream);
 608                 dev->dmasound.read_offset += snd_pcm_lib_period_bytes(substream);
 609                 if (dev->dmasound.read_offset == dev->dmasound.bufsize)
 610                         dev->dmasound.read_offset = 0;
 611         }
 612
 613         return bytes_to_frames(runtime, dev->dmasound.read_offset);
 614 }
 615
 616 /*
 617  * ALSA hardware capabilities definition
 618  *
 619  *  Report only 32kHz for ALSA:
 620  *
 621  *  - SAA7133/35 uses DDEP (DemDec Easy Programming mode), which works in 32kHz
 622  *    only
 623  *  - SAA7134 for TV mode uses DemDec mode (32kHz)
 624  *  - Radio works in 32kHz only
 625  *  - When recording 48kHz from Line1/Line2, switching of capture source to TV
 626  *    means
 627  *    switching to 32kHz without any frequency translation
 628  */
 629
 630 static const struct snd_pcm_hardware snd_card_saa7134_capture =
 631 {
 632         .info =                 (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
 633                                  SNDRV_PCM_INFO_BLOCK_TRANSFER |
 634                                  SNDRV_PCM_INFO_MMAP_VALID),
 635         .formats =              SNDRV_PCM_FMTBIT_S16_LE | \
 636                                 SNDRV_PCM_FMTBIT_S16_BE | \
 637                                 SNDRV_PCM_FMTBIT_S8 | \
 638                                 SNDRV_PCM_FMTBIT_U8 | \
 639                                 SNDRV_PCM_FMTBIT_U16_LE | \
 640                                 SNDRV_PCM_FMTBIT_U16_BE,
 641         .rates =                SNDRV_PCM_RATE_32000,
 642         .rate_min =             32000,
 643         .rate_max =             32000,
 644         .channels_min =         1,
 645         .channels_max =         2,
 646         .buffer_bytes_max =     (256*1024),
 647         .period_bytes_min =     64,
 648         .period_bytes_max =     (256*1024),
 649         .periods_min =          4,
 650         .periods_max =          1024,
 651 };
 652
 653 static void snd_card_saa7134_runtime_free(struct snd_pcm_runtime *runtime)
 654 {
 655         snd_card_saa7134_pcm_t *pcm = runtime->private_data;
 656
 657         kfree(pcm);
 658 }
 659
 660
 661 /*
 662  * ALSA hardware params
 663  *
 664  *   - One of the ALSA capture callbacks.
 665  *
 666  *   Called on initialization, right before the PCM preparation
 667  *
 668  */
 669
 670 static int snd_card_saa7134_hw_params(struct snd_pcm_substream * substream,
 671                                       struct snd_pcm_hw_params * hw_params)
 672 {
 673         snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
 674         struct saa7134_dev *dev;
 675         unsigned int period_size, periods;
 676         int err;
 677
 678         period_size = params_period_bytes(hw_params);
 679         periods = params_periods(hw_params);
 680
 681         if (period_size < 0x100 || period_size > 0x10000)
 682                 return -EINVAL;
 683         if (periods < 4)
 684                 return -EINVAL;
 685         if (period_size * periods > 1024 * 1024)
 686                 return -EINVAL;
 687
 688         dev = saa7134->dev;
 689
 690         if (dev->dmasound.blocks == periods &&
 691             dev->dmasound.blksize == period_size)
 692                 return 0;
 693
 694         /* release the old buffer */
 695         if (substream->runtime->dma_area) {
 696                 saa7134_pgtable_free(dev->pci, &dev->dmasound.pt);
 697                 saa7134_alsa_dma_unmap(dev);
 698                 dsp_buffer_free(dev);
 699                 substream->runtime->dma_area = NULL;
 700         }
 701         dev->dmasound.blocks  = periods;
 702         dev->dmasound.blksize = period_size;
 703         dev->dmasound.bufsize = period_size * periods;
 704
 705         err = dsp_buffer_init(dev);
 706         if (0 != err) {
 707                 dev->dmasound.blocks  = 0;
 708                 dev->dmasound.blksize = 0;
 709                 dev->dmasound.bufsize = 0;
 710                 return err;
 711         }
 712
 713         err = saa7134_alsa_dma_map(dev);
 714         if (err) {
 715                 dsp_buffer_free(dev);
 716                 return err;
 717         }
 718         err = saa7134_pgtable_alloc(dev->pci, &dev->dmasound.pt);
 719         if (err) {
 720                 saa7134_alsa_dma_unmap(dev);
 721                 dsp_buffer_free(dev);
 722                 return err;
 723         }
 724         err = saa7134_pgtable_build(dev->pci, &dev->dmasound.pt,
 725                                 dev->dmasound.sglist, dev->dmasound.sglen, 0);
 726         if (err) {
 727                 saa7134_pgtable_free(dev->pci, &dev->dmasound.pt);
 728                 saa7134_alsa_dma_unmap(dev);
 729                 dsp_buffer_free(dev);
 730                 return err;
 731         }
 732
 733         /* I should be able to use runtime->dma_addr in the control
 734            byte, but it doesn't work. So I allocate the DMA using the
 735            V4L functions, and force ALSA to use that as the DMA area */
 736
 737         substream->runtime->dma_area = dev->dmasound.vaddr;
 738         substream->runtime->dma_bytes = dev->dmasound.bufsize;
 739         substream->runtime->dma_addr = 0;
 740
 741         return 0;
 742
 743 }
 744
 745 /*
 746  * ALSA hardware release
 747  *
 748  *   - One of the ALSA capture callbacks.
 749  *
 750  *   Called after closing the device, but before snd_card_saa7134_capture_close
 751  *   It stops the DMA audio and releases the buffers.
 752  *
 753  */
 754
 755 static int snd_card_saa7134_hw_free(struct snd_pcm_substream * substream)
 756 {
 757         snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
 758         struct saa7134_dev *dev;
 759
 760         dev = saa7134->dev;
 761
 762         if (substream->runtime->dma_area) {
 763                 saa7134_pgtable_free(dev->pci, &dev->dmasound.pt);
 764                 saa7134_alsa_dma_unmap(dev);
 765                 dsp_buffer_free(dev);
 766                 substream->runtime->dma_area = NULL;
 767         }
 768
 769         return 0;
 770 }
 771
 772 /*
 773  * ALSA capture finish
 774  *
 775  *   - One of the ALSA capture callbacks.
 776  *
 777  *   Called after closing the device.
 778  *
 779  */
 780
 781 static int snd_card_saa7134_capture_close(struct snd_pcm_substream * substream)
 782 {
 783         snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
 784         struct saa7134_dev *dev = saa7134->dev;
 785
 786         if (saa7134->mute_was_on) {
 787                 dev->ctl_mute = 1;
 788                 saa7134_tvaudio_setmute(dev);
 789         }
 790         return 0;
 791 }
 792
 793 /*
 794  * ALSA capture start
 795  *
 796  *   - One of the ALSA capture callbacks.
 797  *
 798  *   Called when opening the device. It creates and populates the PCM
 799  *  structure
 800  *
 801  */
 802
 803 static int snd_card_saa7134_capture_open(struct snd_pcm_substream * substream)
 804 {
 805         struct snd_pcm_runtime *runtime = substream->runtime;
 806         snd_card_saa7134_pcm_t *pcm;
 807         snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
 808         struct saa7134_dev *dev;
 809         int amux, err;
 810
 811         if (!saa7134) {
 812                 pr_err("BUG: saa7134 can't find device struct. Can't proceed with open\n");
 813                 return -ENODEV;
 814         }
 815         dev = saa7134->dev;
 816         mutex_lock(&dev->dmasound.lock);
 817
 818         dev->dmasound.read_count  = 0;
 819         dev->dmasound.read_offset = 0;
 820
 821         amux = dev->input->amux;
 822         if ((amux < 1) || (amux > 3))
 823                 amux = 1;
 824         dev->dmasound.input  =  amux - 1;
 825
 826         mutex_unlock(&dev->dmasound.lock);
 827
 828         pcm = kzalloc(sizeof(*pcm), GFP_KERNEL);
 829         if (pcm == NULL)
 830                 return -ENOMEM;
 831
 832         pcm->dev=saa7134->dev;
 833
 834         spin_lock_init(&pcm->lock);
 835
 836         pcm->substream = substream;
 837         runtime->private_data = pcm;
 838         runtime->private_free = snd_card_saa7134_runtime_free;
 839         runtime->hw = snd_card_saa7134_capture;
 840
 841         if (dev->ctl_mute != 0) {
 842                 saa7134->mute_was_on = 1;
 843                 dev->ctl_mute = 0;
 844                 saa7134_tvaudio_setmute(dev);
 845         }
 846
 847         err = snd_pcm_hw_constraint_integer(runtime,
 848                                                 SNDRV_PCM_HW_PARAM_PERIODS);
 849         if (err < 0)
 850                 return err;
 851
 852         err = snd_pcm_hw_constraint_step(runtime, 0,
 853                                                 SNDRV_PCM_HW_PARAM_PERIODS, 2);
 854         if (err < 0)
 855                 return err;
 856
 857         return 0;
 858 }
 859
 860 /*
 861  * page callback (needed for mmap)
 862  */
 863
 864 static struct page *snd_card_saa7134_page(struct snd_pcm_substream *substream,
 865                                         unsigned long offset)
 866 {
 867         void *pageptr = substream->runtime->dma_area + offset;
 868         return vmalloc_to_page(pageptr);
 869 }
 870
 871 /*
 872  * ALSA capture callbacks definition
 873  */
 874
 875 static const struct snd_pcm_ops snd_card_saa7134_capture_ops = {
 876         .open =                 snd_card_saa7134_capture_open,
 877         .close =                snd_card_saa7134_capture_close,
 878         .ioctl =                snd_pcm_lib_ioctl,
 879         .hw_params =            snd_card_saa7134_hw_params,
 880         .hw_free =              snd_card_saa7134_hw_free,
 881         .prepare =              snd_card_saa7134_capture_prepare,
 882         .trigger =              snd_card_saa7134_capture_trigger,
 883         .pointer =              snd_card_saa7134_capture_pointer,
 884         .page =                 snd_card_saa7134_page,
 885 };
 886
 887 /*
 888  * ALSA PCM setup
 889  *
 890  *   Called when initializing the board. Sets up the name and hooks up
 891  *  the callbacks
 892  *
 893  */
 894
 895 static int snd_card_saa7134_pcm(snd_card_saa7134_t *saa7134, int device)
 896 {
 897         struct snd_pcm *pcm;
 898         int err;
 899
 900         if ((err = snd_pcm_new(saa7134->card, "SAA7134 PCM", device, 0, 1, &pcm)) < 0)
 901                 return err;
 902         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_card_saa7134_capture_ops);
 903         pcm->private_data = saa7134;
 904         pcm->info_flags = 0;
 905         strcpy(pcm->name, "SAA7134 PCM");
 906         return 0;
 907 }
 908
 909 #define SAA713x_VOLUME(xname, xindex, addr) \
 910 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
 911   .info = snd_saa7134_volume_info, \
 912   .get = snd_saa7134_volume_get, .put = snd_saa7134_volume_put, \
 913   .private_value = addr }
 914
 915 static int snd_saa7134_volume_info(struct snd_kcontrol * kcontrol,
 916                                    struct snd_ctl_elem_info * uinfo)
 917 {
 918         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 919         uinfo->count = 2;
 920         uinfo->value.integer.min = 0;
 921         uinfo->value.integer.max = 20;
 922         return 0;
 923 }
 924
 925 static int snd_saa7134_volume_get(struct snd_kcontrol * kcontrol,
 926                                   struct snd_ctl_elem_value * ucontrol)
 927 {
 928         snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol);
 929         int addr = kcontrol->private_value;
 930
 931         ucontrol->value.integer.value[0] = chip->mixer_volume[addr][0];
 932         ucontrol->value.integer.value[1] = chip->mixer_volume[addr][1];
 933         return 0;
 934 }
 935
 936 static int snd_saa7134_volume_put(struct snd_kcontrol * kcontrol,
 937                                   struct snd_ctl_elem_value * ucontrol)
 938 {
 939         snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol);
 940         struct saa7134_dev *dev = chip->dev;
 941
 942         int change, addr = kcontrol->private_value;
 943         int left, right;
 944
 945         left = ucontrol->value.integer.value[0];
 946         if (left < 0)
 947                 left = 0;
 948         if (left > 20)
 949                 left = 20;
 950         right = ucontrol->value.integer.value[1];
 951         if (right < 0)
 952                 right = 0;
 953         if (right > 20)
 954                 right = 20;
 955         spin_lock_irq(&chip->mixer_lock);
 956         change = 0;
 957         if (chip->mixer_volume[addr][0] != left) {
 958                 change = 1;
 959                 right = left;
 960         }
 961         if (chip->mixer_volume[addr][1] != right) {
 962                 change = 1;
 963                 left = right;
 964         }
 965         if (change) {
 966                 switch (dev->pci->device) {
 967                         case PCI_DEVICE_ID_PHILIPS_SAA7134:
 968                                 switch (addr) {
 969                                         case MIXER_ADDR_TVTUNER:
 970                                                 left = 20;
 971                                                 break;
 972                                         case MIXER_ADDR_LINE1:
 973                                                 saa_andorb(SAA7134_ANALOG_IO_SELECT,  0x10,
 974                                                            (left > 10) ? 0x00 : 0x10);
 975                                                 break;
 976                                         case MIXER_ADDR_LINE2:
 977                                                 saa_andorb(SAA7134_ANALOG_IO_SELECT,  0x20,
 978                                                            (left > 10) ? 0x00 : 0x20);
 979                                                 break;
 980                                 }
 981                                 break;
 982                         case PCI_DEVICE_ID_PHILIPS_SAA7133:
 983                         case PCI_DEVICE_ID_PHILIPS_SAA7135:
 984                                 switch (addr) {
 985                                         case MIXER_ADDR_TVTUNER:
 986                                                 left = 20;
 987                                                 break;
 988                                         case MIXER_ADDR_LINE1:
 989                                                 saa_andorb(0x0594,  0x10,
 990                                                            (left > 10) ? 0x00 : 0x10);
 991                                                 break;
 992                                         case MIXER_ADDR_LINE2:
 993                                                 saa_andorb(0x0594,  0x20,
 994                                                            (left > 10) ? 0x00 : 0x20);
 995                                                 break;
 996                                 }
 997                                 break;
 998                 }
 999                 chip->mixer_volume[addr][0] = left;
1000                 chip->mixer_volume[addr][1] = right;
1001         }
1002         spin_unlock_irq(&chip->mixer_lock);
1003         return change;
1004 }
1005
1006 #define SAA713x_CAPSRC(xname, xindex, addr) \
1007 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
1008   .info = snd_saa7134_capsrc_info, \
1009   .get = snd_saa7134_capsrc_get, .put = snd_saa7134_capsrc_put, \
1010   .private_value = addr }
1011
1012 static int snd_saa7134_capsrc_info(struct snd_kcontrol * kcontrol,
1013                                    struct snd_ctl_elem_info * uinfo)
1014 {
1015         uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
1016         uinfo->count = 2;
1017         uinfo->value.integer.min = 0;
1018         uinfo->value.integer.max = 1;
1019         return 0;
1020 }
1021
1022 static int snd_saa7134_capsrc_get(struct snd_kcontrol * kcontrol,
1023                                   struct snd_ctl_elem_value * ucontrol)
1024 {
1025         snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol);
1026         int addr = kcontrol->private_value;
1027
1028         spin_lock_irq(&chip->mixer_lock);
1029         if (chip->capture_source_addr == addr) {
1030                 ucontrol->value.integer.value[0] = chip->capture_source[0];
1031                 ucontrol->value.integer.value[1] = chip->capture_source[1];
1032         } else {
1033                 ucontrol->value.integer.value[0] = 0;
1034                 ucontrol->value.integer.value[1] = 0;
1035         }
1036         spin_unlock_irq(&chip->mixer_lock);
1037
1038         return 0;
1039 }
1040
1041 static int snd_saa7134_capsrc_put(struct snd_kcontrol * kcontrol,
1042                                   struct snd_ctl_elem_value * ucontrol)
1043 {
1044         int left, right;
1045         left = ucontrol->value.integer.value[0] & 1;
1046         right = ucontrol->value.integer.value[1] & 1;
1047
1048         return snd_saa7134_capsrc_set(kcontrol, left, right, false);
1049 }
1050
1051 static struct snd_kcontrol_new snd_saa7134_volume_controls[] = {
1052 SAA713x_VOLUME("Video Volume", 0, MIXER_ADDR_TVTUNER),
1053 SAA713x_VOLUME("Line Volume", 1, MIXER_ADDR_LINE1),
1054 SAA713x_VOLUME("Line Volume", 2, MIXER_ADDR_LINE2),
1055 };
1056
1057 static struct snd_kcontrol_new snd_saa7134_capture_controls[] = {
1058 SAA713x_CAPSRC("Video Capture Switch", 0, MIXER_ADDR_TVTUNER),
1059 SAA713x_CAPSRC("Line Capture Switch", 1, MIXER_ADDR_LINE1),
1060 SAA713x_CAPSRC("Line Capture Switch", 2, MIXER_ADDR_LINE2),
1061 };
1062
1063 /*
1064  * ALSA mixer setup
1065  *
1066  *   Called when initializing the board. Sets up the name and hooks up
1067  *  the callbacks
1068  *
1069  */
1070
1071 static int snd_card_saa7134_new_mixer(snd_card_saa7134_t * chip)
1072 {
1073         struct snd_card *card = chip->card;
1074         struct snd_kcontrol *kcontrol;
1075         unsigned int idx;
1076         int err, addr;
1077
1078         strcpy(card->mixername, "SAA7134 Mixer");
1079
1080         for (idx = 0; idx < ARRAY_SIZE(snd_saa7134_volume_controls); idx++) {
1081                 kcontrol = snd_ctl_new1(&snd_saa7134_volume_controls[idx],
1082                                         chip);
1083                 err = snd_ctl_add(card, kcontrol);
1084                 if (err < 0)
1085                         return err;
1086         }
1087
1088         for (idx = 0; idx < ARRAY_SIZE(snd_saa7134_capture_controls); idx++) {
1089                 kcontrol = snd_ctl_new1(&snd_saa7134_capture_controls[idx],
1090                                         chip);
1091                 addr = snd_saa7134_capture_controls[idx].private_value;
1092                 chip->capture_ctl[addr] = kcontrol;
1093                 err = snd_ctl_add(card, kcontrol);
1094                 if (err < 0)
1095                         return err;
1096         }
1097
1098         chip->capture_source_addr = MIXER_ADDR_UNSELECTED;
1099         return 0;
1100 }
1101
1102 static void snd_saa7134_free(struct snd_card * card)
1103 {
1104         snd_card_saa7134_t *chip = card->private_data;
1105
1106         if (chip->dev->dmasound.priv_data == NULL)
1107                 return;
1108
1109         if (chip->irq >= 0)
1110                 free_irq(chip->irq, &chip->dev->dmasound);
1111
1112         chip->dev->dmasound.priv_data = NULL;
1113
1114 }
1115
1116 /*
1117  * ALSA initialization
1118  *
1119  *   Called by the init routine, once for each saa7134 device present,
1120  *  it creates the basic structures and registers the ALSA devices
1121  *
1122  */
1123
1124 static int alsa_card_saa7134_create(struct saa7134_dev *dev, int devnum)
1125 {
1126
1127         struct snd_card *card;
1128         snd_card_saa7134_t *chip;
1129         int err;
1130
1131
1132         if (devnum >= SNDRV_CARDS)
1133                 return -ENODEV;
1134         if (!enable[devnum])
1135                 return -ENODEV;
1136
1137         err = snd_card_new(&dev->pci->dev, index[devnum], id[devnum],
1138                            THIS_MODULE, sizeof(snd_card_saa7134_t), &card);
1139         if (err < 0)
1140                 return err;
1141
1142         strcpy(card->driver, "SAA7134");
1143
1144         /* Card "creation" */
1145
1146         card->private_free = snd_saa7134_free;
1147         chip = card->private_data;
1148
1149         spin_lock_init(&chip->lock);
1150         spin_lock_init(&chip->mixer_lock);
1151
1152         chip->dev = dev;
1153
1154         chip->card = card;
1155
1156         chip->pci = dev->pci;
1157         chip->iobase = pci_resource_start(dev->pci, 0);
1158
1159
1160         err = request_irq(dev->pci->irq, saa7134_alsa_irq,
1161                                 IRQF_SHARED, dev->name,
1162                                 (void*) &dev->dmasound);
1163
1164         if (err < 0) {
1165                 pr_err("%s: can't get IRQ %d for ALSA\n",
1166                         dev->name, dev->pci->irq);
1167                 goto __nodev;
1168         }
1169
1170         chip->irq = dev->pci->irq;
1171
1172         mutex_init(&dev->dmasound.lock);
1173
1174         if ((err = snd_card_saa7134_new_mixer(chip)) < 0)
1175                 goto __nodev;
1176
1177         if ((err = snd_card_saa7134_pcm(chip, 0)) < 0)
1178                 goto __nodev;
1179
1180         /* End of "creation" */
1181
1182         strcpy(card->shortname, "SAA7134");
1183         sprintf(card->longname, "%s at 0x%lx irq %d",
1184                 chip->dev->name, chip->iobase, chip->irq);
1185
1186         pr_info("%s/alsa: %s registered as card %d\n",
1187                 dev->name, card->longname, index[devnum]);
1188
1189         if ((err = snd_card_register(card)) == 0) {
1190                 snd_saa7134_cards[devnum] = card;
1191                 return 0;
1192         }
1193
1194 __nodev:
1195         snd_card_free(card);
1196         return err;
1197 }
1198
1199
1200 static int alsa_device_init(struct saa7134_dev *dev)
1201 {
1202         dev->dmasound.priv_data = dev;
1203         alsa_card_saa7134_create(dev,dev->nr);
1204         return 1;
1205 }
1206
1207 static int alsa_device_exit(struct saa7134_dev *dev)
1208 {
1209         if (!snd_saa7134_cards[dev->nr])
1210                 return 1;
1211
1212         snd_card_free(snd_saa7134_cards[dev->nr]);
1213         snd_saa7134_cards[dev->nr] = NULL;
1214         return 1;
1215 }
1216
1217 /*
1218  * Module initializer
1219  *
1220  * Loops through present saa7134 cards, and assigns an ALSA device
1221  * to each one
1222  *
1223  */
1224
1225 static int saa7134_alsa_init(void)
1226 {
1227         struct saa7134_dev *dev = NULL;
1228         struct list_head *list;
1229
1230         saa7134_dmasound_init = alsa_device_init;
1231         saa7134_dmasound_exit = alsa_device_exit;
1232
1233         pr_info("saa7134 ALSA driver for DMA sound loaded\n");
1234
1235         list_for_each(list,&saa7134_devlist) {
1236                 dev = list_entry(list, struct saa7134_dev, devlist);
1237                 if (dev->pci->device == PCI_DEVICE_ID_PHILIPS_SAA7130)
1238                         pr_info("%s/alsa: %s doesn't support digital audio\n",
1239                                 dev->name, saa7134_boards[dev->board].name);
1240                 else
1241                         alsa_device_init(dev);
1242         }
1243
1244         if (dev == NULL)
1245                 pr_info("saa7134 ALSA: no saa7134 cards found\n");
1246
1247         return 0;
1248
1249 }
1250
1251 /*
1252  * Module destructor
1253  */
1254
1255 static void saa7134_alsa_exit(void)
1256 {
1257         int idx;
1258
1259         for (idx = 0; idx < SNDRV_CARDS; idx++) {
1260                 if (snd_saa7134_cards[idx])
1261                         snd_card_free(snd_saa7134_cards[idx]);
1262         }
1263
1264         saa7134_dmasound_init = NULL;
1265         saa7134_dmasound_exit = NULL;
1266         pr_info("saa7134 ALSA driver for DMA sound unloaded\n");
1267
1268         return;
1269 }
1270
1271 /* We initialize this late, to make sure the sound system is up and running */
1272 late_initcall(saa7134_alsa_init);
1273 module_exit(saa7134_alsa_exit);
1274 MODULE_LICENSE("GPL");
1275 MODULE_AUTHOR("Ricardo Cerqueira");