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