drivers/media/video/saa7134/saa7134-alsa.c

   1 /*
   2  *   SAA713x ALSA support for V4L
   3  *
   4  *
   5  *   Caveats:
   6  *        - Volume doesn't work (it's always at max)
   7  *
   8  *   This program is free software; you can redistribute it and/or modify
   9  *   it under the terms of the GNU General Public License as published by
  10  *   the Free Software Foundation, version 2
  11  *
  12  *   This program is distributed in the hope that it will be useful,
  13  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *   GNU General Public License for more details.
  16  *
  17  *   You should have received a copy of the GNU General Public License
  18  *   along with this program; if not, write to the Free Software
  19  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  20  *
  21  */
  22
  23 #include <linux/init.h>
  24 #include <linux/slab.h>
  25 #include <linux/time.h>
  26 #include <linux/wait.h>
  27 #include <linux/moduleparam.h>
  28 #include <linux/module.h>
  29 #include <sound/driver.h>
  30 #include <sound/core.h>
  31 #include <sound/control.h>
  32 #include <sound/pcm.h>
  33 #include <sound/pcm_params.h>
  34 #include <sound/initval.h>
  35 #include <linux/interrupt.h>
  36
  37 #include "saa7134.h"
  38 #include "saa7134-reg.h"
  39
  40 static unsigned int debug  = 0;
  41 module_param(debug, int, 0644);
  42 MODULE_PARM_DESC(debug,"enable debug messages [alsa]");
  43
  44 /*
  45  * Configuration macros
  46  */
  47
  48 /* defaults */
  49 #define MIXER_ADDR_TVTUNER      0
  50 #define MIXER_ADDR_LINE1        1
  51 #define MIXER_ADDR_LINE2        2
  52 #define MIXER_ADDR_LAST         2
  53
  54
  55 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;      /* Index 0-MAX */
  56 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;       /* ID for this card */
  57 static int enable[SNDRV_CARDS] = {1, [1 ... (SNDRV_CARDS - 1)] = 0};
  58
  59 module_param_array(index, int, NULL, 0444);
  60 MODULE_PARM_DESC(index, "Index value for SAA7134 capture interface(s).");
  61
  62 #define dprintk(fmt, arg...)    if (debug) \
  63         printk(KERN_DEBUG "%s/alsa: " fmt, dev->name , ##arg)
  64
  65
  66
  67 /*
  68  * Main chip structure
  69  */
  70
  71 typedef struct snd_card_saa7134 {
  72         snd_card_t *card;
  73         spinlock_t mixer_lock;
  74         int mixer_volume[MIXER_ADDR_LAST+1][2];
  75         int capture_source[MIXER_ADDR_LAST+1][2];
  76         struct pci_dev *pci;
  77         struct saa7134_dev *dev;
  78
  79         unsigned long iobase;
  80         int irq;
  81
  82         spinlock_t lock;
  83 } snd_card_saa7134_t;
  84
  85
  86
  87 /*
  88  * PCM structure
  89  */
  90
  91 typedef struct snd_card_saa7134_pcm {
  92         struct saa7134_dev *dev;
  93
  94         spinlock_t lock;
  95
  96         snd_pcm_substream_t *substream;
  97 } snd_card_saa7134_pcm_t;
  98
  99 static snd_card_t *snd_saa7134_cards[SNDRV_CARDS];
 100
 101
 102 /*
 103  * saa7134 DMA audio stop
 104  *
 105  *   Called when the capture device is released or the buffer overflows
 106  *
 107  *   - Copied verbatim from saa7134-oss's dsp_dma_stop.
 108  *
 109  */
 110
 111 static void saa7134_dma_stop(struct saa7134_dev *dev)
 112 {
 113         dev->dmasound.dma_blk     = -1;
 114         dev->dmasound.dma_running = 0;
 115         saa7134_set_dmabits(dev);
 116 }
 117
 118 /*
 119  * saa7134 DMA audio start
 120  *
 121  *   Called when preparing the capture device for use
 122  *
 123  *   - Copied verbatim from saa7134-oss's dsp_dma_start.
 124  *
 125  */
 126
 127 static void saa7134_dma_start(struct saa7134_dev *dev)
 128 {
 129         dev->dmasound.dma_blk     = 0;
 130         dev->dmasound.dma_running = 1;
 131         saa7134_set_dmabits(dev);
 132 }
 133
 134 /*
 135  * saa7134 audio DMA IRQ handler
 136  *
 137  *   Called whenever we get an SAA7134_IRQ_REPORT_DONE_RA3 interrupt
 138  *   Handles shifting between the 2 buffers, manages the read counters,
 139  *  and notifies ALSA when periods elapse
 140  *
 141  *   - Mostly copied from saa7134-oss's saa7134_irq_oss_done.
 142  *
 143  */
 144
 145 static void saa7134_irq_alsa_done(struct saa7134_dev *dev,
 146                                   unsigned long status)
 147 {
 148         int next_blk, reg = 0;
 149
 150         spin_lock(&dev->slock);
 151         if (UNSET == dev->dmasound.dma_blk) {
 152                 dprintk("irq: recording stopped\n");
 153                 goto done;
 154         }
 155         if (0 != (status & 0x0f000000))
 156                 dprintk("irq: lost %ld\n", (status >> 24) & 0x0f);
 157         if (0 == (status & 0x10000000)) {
 158                 /* odd */
 159                 if (0 == (dev->dmasound.dma_blk & 0x01))
 160                         reg = SAA7134_RS_BA1(6);
 161         } else {
 162                 /* even */
 163                 if (1 == (dev->dmasound.dma_blk & 0x01))
 164                         reg = SAA7134_RS_BA2(6);
 165         }
 166         if (0 == reg) {
 167                 dprintk("irq: field oops [%s]\n",
 168                         (status & 0x10000000) ? "even" : "odd");
 169                 goto done;
 170         }
 171
 172         if (dev->dmasound.read_count >= dev->dmasound.blksize * (dev->dmasound.blocks-2)) {
 173                 dprintk("irq: overrun [full=%d/%d] - Blocks in %d\n",dev->dmasound.read_count,
 174                         dev->dmasound.bufsize, dev->dmasound.blocks);
 175                 spin_unlock(&dev->slock);
 176                 snd_pcm_stop(dev->dmasound.substream,SNDRV_PCM_STATE_XRUN);
 177                 return;
 178         }
 179
 180         /* next block addr */
 181         next_blk = (dev->dmasound.dma_blk + 2) % dev->dmasound.blocks;
 182         saa_writel(reg,next_blk * dev->dmasound.blksize);
 183         if (debug > 2)
 184                 dprintk("irq: ok, %s, next_blk=%d, addr=%x, blocks=%u, size=%u, read=%u\n",
 185                         (status & 0x10000000) ? "even" : "odd ", next_blk,
 186                         next_blk * dev->dmasound.blksize, dev->dmasound.blocks, dev->dmasound.blksize, dev->dmasound.read_count);
 187
 188         /* update status & wake waiting readers */
 189         dev->dmasound.dma_blk = (dev->dmasound.dma_blk + 1) % dev->dmasound.blocks;
 190         dev->dmasound.read_count += dev->dmasound.blksize;
 191
 192         dev->dmasound.recording_on = reg;
 193
 194         if (dev->dmasound.read_count >= snd_pcm_lib_period_bytes(dev->dmasound.substream)) {
 195                 spin_unlock(&dev->slock);
 196                 snd_pcm_period_elapsed(dev->dmasound.substream);
 197                 spin_lock(&dev->slock);
 198         }
 199
 200  done:
 201         spin_unlock(&dev->slock);
 202
 203 }
 204
 205 /*
 206  * IRQ request handler
 207  *
 208  *   Runs along with saa7134's IRQ handler, discards anything that isn't
 209  *   DMA sound
 210  *
 211  */
 212
 213 static irqreturn_t saa7134_alsa_irq(int irq, void *dev_id, struct pt_regs *regs)
 214 {
 215         struct saa7134_dmasound *dmasound = dev_id;
 216         struct saa7134_dev *dev = dmasound->priv_data;
 217
 218         unsigned long report, status;
 219         int loop, handled = 0;
 220
 221         for (loop = 0; loop < 10; loop++) {
 222                 report = saa_readl(SAA7134_IRQ_REPORT);
 223                 status = saa_readl(SAA7134_IRQ_STATUS);
 224
 225                 if (report & SAA7134_IRQ_REPORT_DONE_RA3) {
 226                         handled = 1;
 227                         saa_writel(SAA7134_IRQ_REPORT,report);
 228                         saa7134_irq_alsa_done(dev, status);
 229                 } else {
 230                         goto out;
 231                 }
 232         }
 233
 234         if (loop == 10) {
 235                 dprintk("error! looping IRQ!");
 236         }
 237
 238 out:
 239         return IRQ_RETVAL(handled);
 240 }
 241
 242 /*
 243  * ALSA capture trigger
 244  *
 245  *   - One of the ALSA capture callbacks.
 246  *
 247  *   Called whenever a capture is started or stopped. Must be defined,
 248  *   but there's nothing we want to do here
 249  *
 250  */
 251
 252 static int snd_card_saa7134_capture_trigger(snd_pcm_substream_t * substream,
 253                                           int cmd)
 254 {
 255         snd_pcm_runtime_t *runtime = substream->runtime;
 256         snd_card_saa7134_pcm_t *pcm = runtime->private_data;
 257         struct saa7134_dev *dev=pcm->dev;
 258         int err = 0;
 259
 260         spin_lock(&dev->slock);
 261         if (cmd == SNDRV_PCM_TRIGGER_START) {
 262                 /* start dma */
 263                 saa7134_dma_start(dev);
 264         } else if (cmd == SNDRV_PCM_TRIGGER_STOP) {
 265                 /* stop dma */
 266                 saa7134_dma_stop(dev);
 267         } else {
 268                 err = -EINVAL;
 269         }
 270         spin_unlock(&dev->slock);
 271
 272         return err;
 273 }
 274
 275 /*
 276  * DMA buffer initialization
 277  *
 278  *   Uses V4L functions to initialize the DMA. Shouldn't be necessary in
 279  *  ALSA, but I was unable to use ALSA's own DMA, and had to force the
 280  *  usage of V4L's
 281  *
 282  *   - Copied verbatim from saa7134-oss.
 283  *
 284  */
 285
 286 static int dsp_buffer_init(struct saa7134_dev *dev)
 287 {
 288         int err;
 289
 290         BUG_ON(!dev->dmasound.bufsize);
 291
 292         videobuf_dma_init(&dev->dmasound.dma);
 293         err = videobuf_dma_init_kernel(&dev->dmasound.dma, PCI_DMA_FROMDEVICE,
 294                                        (dev->dmasound.bufsize + PAGE_SIZE) >> PAGE_SHIFT);
 295         if (0 != err)
 296                 return err;
 297         return 0;
 298 }
 299
 300 /*
 301  * DMA buffer release
 302  *
 303  *   Called after closing the device, during snd_card_saa7134_capture_close
 304  *
 305  */
 306
 307 static int dsp_buffer_free(struct saa7134_dev *dev)
 308 {
 309         if (!dev->dmasound.blksize)
 310                 BUG();
 311
 312         videobuf_dma_free(&dev->dmasound.dma);
 313
 314         dev->dmasound.blocks  = 0;
 315         dev->dmasound.blksize = 0;
 316         dev->dmasound.bufsize = 0;
 317
 318        return 0;
 319 }
 320
 321
 322 /*
 323  * ALSA PCM preparation
 324  *
 325  *   - One of the ALSA capture callbacks.
 326  *
 327  *   Called right after the capture device is opened, this function configures
 328  *  the buffer using the previously defined functions, allocates the memory,
 329  *  sets up the hardware registers, and then starts the DMA. When this function
 330  *  returns, the audio should be flowing.
 331  *
 332  */
 333
 334 static int snd_card_saa7134_capture_prepare(snd_pcm_substream_t * substream)
 335 {
 336         snd_pcm_runtime_t *runtime = substream->runtime;
 337         int bswap, sign;
 338         u32 fmt, control;
 339         snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
 340         struct saa7134_dev *dev;
 341         snd_card_saa7134_pcm_t *pcm = runtime->private_data;
 342
 343         pcm->dev->dmasound.substream = substream;
 344
 345         dev = saa7134->dev;
 346
 347         if (snd_pcm_format_width(runtime->format) == 8)
 348                 fmt = 0x00;
 349         else
 350                 fmt = 0x01;
 351
 352         if (snd_pcm_format_signed(runtime->format))
 353                 sign = 1;
 354         else
 355                 sign = 0;
 356
 357         if (snd_pcm_format_big_endian(runtime->format))
 358                 bswap = 1;
 359         else
 360                 bswap = 0;
 361
 362         switch (dev->pci->device) {
 363           case PCI_DEVICE_ID_PHILIPS_SAA7134:
 364                 if (1 == runtime->channels)
 365                         fmt |= (1 << 3);
 366                 if (2 == runtime->channels)
 367                         fmt |= (3 << 3);
 368                 if (sign)
 369                         fmt |= 0x04;
 370
 371                 fmt |= (MIXER_ADDR_TVTUNER == dev->dmasound.input) ? 0xc0 : 0x80;
 372                 saa_writeb(SAA7134_NUM_SAMPLES0, ((dev->dmasound.blksize - 1) & 0x0000ff));
 373                 saa_writeb(SAA7134_NUM_SAMPLES1, ((dev->dmasound.blksize - 1) & 0x00ff00) >>  8);
 374                 saa_writeb(SAA7134_NUM_SAMPLES2, ((dev->dmasound.blksize - 1) & 0xff0000) >> 16);
 375                 saa_writeb(SAA7134_AUDIO_FORMAT_CTRL, fmt);
 376
 377                 break;
 378           case PCI_DEVICE_ID_PHILIPS_SAA7133:
 379           case PCI_DEVICE_ID_PHILIPS_SAA7135:
 380                 if (1 == runtime->channels)
 381                         fmt |= (1 << 4);
 382                 if (2 == runtime->channels)
 383                         fmt |= (2 << 4);
 384                 if (!sign)
 385                         fmt |= 0x04;
 386                 saa_writel(SAA7133_NUM_SAMPLES, dev->dmasound.blksize -1);
 387                 saa_writel(SAA7133_AUDIO_CHANNEL, 0x543210 | (fmt << 24));
 388                 break;
 389         }
 390
 391         dprintk("rec_start: afmt=%d ch=%d  =>  fmt=0x%x swap=%c\n",
 392                 runtime->format, runtime->channels, fmt,
 393                 bswap ? 'b' : '-');
 394         /* dma: setup channel 6 (= AUDIO) */
 395         control = SAA7134_RS_CONTROL_BURST_16 |
 396                 SAA7134_RS_CONTROL_ME |
 397                 (dev->dmasound.pt.dma >> 12);
 398         if (bswap)
 399                 control |= SAA7134_RS_CONTROL_BSWAP;
 400
 401         saa_writel(SAA7134_RS_BA1(6),0);
 402         saa_writel(SAA7134_RS_BA2(6),dev->dmasound.blksize);
 403         saa_writel(SAA7134_RS_PITCH(6),0);
 404         saa_writel(SAA7134_RS_CONTROL(6),control);
 405
 406         dev->dmasound.rate = runtime->rate;
 407
 408         return 0;
 409
 410 }
 411
 412 /*
 413  * ALSA pointer fetching
 414  *
 415  *   - One of the ALSA capture callbacks.
 416  *
 417  *   Called whenever a period elapses, it must return the current hardware
 418  *  position of the buffer.
 419  *   Also resets the read counter used to prevent overruns
 420  *
 421  */
 422
 423 static snd_pcm_uframes_t snd_card_saa7134_capture_pointer(snd_pcm_substream_t * substream)
 424 {
 425         snd_pcm_runtime_t *runtime = substream->runtime;
 426         snd_card_saa7134_pcm_t *pcm = runtime->private_data;
 427         struct saa7134_dev *dev=pcm->dev;
 428
 429         if (dev->dmasound.read_count) {
 430                 dev->dmasound.read_count  -= snd_pcm_lib_period_bytes(substream);
 431                 dev->dmasound.read_offset += snd_pcm_lib_period_bytes(substream);
 432                 if (dev->dmasound.read_offset == dev->dmasound.bufsize)
 433                         dev->dmasound.read_offset = 0;
 434         }
 435
 436         return bytes_to_frames(runtime, dev->dmasound.read_offset);
 437 }
 438
 439 /*
 440  * ALSA hardware capabilities definition
 441  */
 442
 443 static snd_pcm_hardware_t snd_card_saa7134_capture =
 444 {
 445         .info =                 (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
 446                                  SNDRV_PCM_INFO_BLOCK_TRANSFER |
 447                                  SNDRV_PCM_INFO_MMAP_VALID),
 448         .formats =              SNDRV_PCM_FMTBIT_S16_LE | \
 449                                 SNDRV_PCM_FMTBIT_S16_BE | \
 450                                 SNDRV_PCM_FMTBIT_S8 | \
 451                                 SNDRV_PCM_FMTBIT_U8 | \
 452                                 SNDRV_PCM_FMTBIT_U16_LE | \
 453                                 SNDRV_PCM_FMTBIT_U16_BE,
 454         .rates =                SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_48000,
 455         .rate_min =             32000,
 456         .rate_max =             48000,
 457         .channels_min =         1,
 458         .channels_max =         2,
 459         .buffer_bytes_max =     (256*1024),
 460         .period_bytes_min =     64,
 461         .period_bytes_max =     (256*1024),
 462         .periods_min =          2,
 463         .periods_max =          1024,
 464 };
 465
 466 static void snd_card_saa7134_runtime_free(snd_pcm_runtime_t *runtime)
 467 {
 468         snd_card_saa7134_pcm_t *pcm = runtime->private_data;
 469
 470         kfree(pcm);
 471 }
 472
 473
 474 /*
 475  * ALSA hardware params
 476  *
 477  *   - One of the ALSA capture callbacks.
 478  *
 479  *   Called on initialization, right before the PCM preparation
 480  *
 481  */
 482
 483 static int snd_card_saa7134_hw_params(snd_pcm_substream_t * substream,
 484                                     snd_pcm_hw_params_t * hw_params)
 485 {
 486         snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
 487         struct saa7134_dev *dev;
 488         unsigned int period_size, periods;
 489         int err;
 490
 491         period_size = params_period_bytes(hw_params);
 492         periods = params_periods(hw_params);
 493
 494         snd_assert(period_size >= 0x100 && period_size <= 0x10000,
 495                    return -EINVAL);
 496         snd_assert(periods >= 2, return -EINVAL);
 497         snd_assert(period_size * periods <= 1024 * 1024, return -EINVAL);
 498
 499         dev = saa7134->dev;
 500
 501         if (dev->dmasound.blocks == periods &&
 502             dev->dmasound.blksize == period_size)
 503                 return 0;
 504
 505         /* release the old buffer */
 506         if (substream->runtime->dma_area) {
 507                 saa7134_pgtable_free(dev->pci, &dev->dmasound.pt);
 508                 videobuf_dma_pci_unmap(dev->pci, &dev->dmasound.dma);
 509                 dsp_buffer_free(dev);
 510                 substream->runtime->dma_area = NULL;
 511         }
 512         dev->dmasound.blocks  = periods;
 513         dev->dmasound.blksize = period_size;
 514         dev->dmasound.bufsize = period_size * periods;
 515
 516         err = dsp_buffer_init(dev);
 517         if (0 != err) {
 518                 dev->dmasound.blocks  = 0;
 519                 dev->dmasound.blksize = 0;
 520                 dev->dmasound.bufsize = 0;
 521                 return err;
 522         }
 523
 524         if (0 != (err = videobuf_dma_pci_map(dev->pci, &dev->dmasound.dma))) {
 525                 dsp_buffer_free(dev);
 526                 return err;
 527         }
 528         if (0 != (err = saa7134_pgtable_alloc(dev->pci,&dev->dmasound.pt))) {
 529                 videobuf_dma_pci_unmap(dev->pci, &dev->dmasound.dma);
 530                 dsp_buffer_free(dev);
 531                 return err;
 532         }
 533         if (0 != (err = saa7134_pgtable_build(dev->pci,&dev->dmasound.pt,
 534                                                 dev->dmasound.dma.sglist,
 535                                                 dev->dmasound.dma.sglen,
 536                                                 0))) {
 537                 saa7134_pgtable_free(dev->pci, &dev->dmasound.pt);
 538                 videobuf_dma_pci_unmap(dev->pci, &dev->dmasound.dma);
 539                 dsp_buffer_free(dev);
 540                 return err;
 541         }
 542
 543         /* I should be able to use runtime->dma_addr in the control
 544            byte, but it doesn't work. So I allocate the DMA using the
 545            V4L functions, and force ALSA to use that as the DMA area */
 546
 547         substream->runtime->dma_area = dev->dmasound.dma.vmalloc;
 548
 549         return 1;
 550
 551 }
 552
 553 /*
 554  * ALSA hardware release
 555  *
 556  *   - One of the ALSA capture callbacks.
 557  *
 558  *   Called after closing the device, but before snd_card_saa7134_capture_close
 559  *   It stops the DMA audio and releases the buffers.
 560  *
 561  */
 562
 563 static int snd_card_saa7134_hw_free(snd_pcm_substream_t * substream)
 564 {
 565         snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
 566         struct saa7134_dev *dev;
 567
 568         dev = saa7134->dev;
 569
 570         if (substream->runtime->dma_area) {
 571                 saa7134_pgtable_free(dev->pci, &dev->dmasound.pt);
 572                 videobuf_dma_pci_unmap(dev->pci, &dev->dmasound.dma);
 573                 dsp_buffer_free(dev);
 574                 substream->runtime->dma_area = NULL;
 575         }
 576
 577         return 0;
 578 }
 579
 580 /*
 581  * ALSA capture finish
 582  *
 583  *   - One of the ALSA capture callbacks.
 584  *
 585  *   Called after closing the device.
 586  *
 587  */
 588
 589 static int snd_card_saa7134_capture_close(snd_pcm_substream_t * substream)
 590 {
 591         return 0;
 592 }
 593
 594 /*
 595  * ALSA capture start
 596  *
 597  *   - One of the ALSA capture callbacks.
 598  *
 599  *   Called when opening the device. It creates and populates the PCM
 600  *  structure
 601  *
 602  */
 603
 604 static int snd_card_saa7134_capture_open(snd_pcm_substream_t * substream)
 605 {
 606         snd_pcm_runtime_t *runtime = substream->runtime;
 607         snd_card_saa7134_pcm_t *pcm;
 608         snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
 609         struct saa7134_dev *dev = saa7134->dev;
 610         int err;
 611
 612         down(&dev->dmasound.lock);
 613
 614         dev->dmasound.read_count  = 0;
 615         dev->dmasound.read_offset = 0;
 616
 617         up(&dev->dmasound.lock);
 618
 619         pcm = kzalloc(sizeof(*pcm), GFP_KERNEL);
 620         if (pcm == NULL)
 621                 return -ENOMEM;
 622
 623         pcm->dev=saa7134->dev;
 624
 625         spin_lock_init(&pcm->lock);
 626
 627         pcm->substream = substream;
 628         runtime->private_data = pcm;
 629         runtime->private_free = snd_card_saa7134_runtime_free;
 630         runtime->hw = snd_card_saa7134_capture;
 631
 632         if ((err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
 633                 return err;
 634
 635         return 0;
 636 }
 637
 638 /*
 639  * ALSA capture callbacks definition
 640  */
 641
 642 static snd_pcm_ops_t snd_card_saa7134_capture_ops = {
 643         .open =                 snd_card_saa7134_capture_open,
 644         .close =                snd_card_saa7134_capture_close,
 645         .ioctl =                snd_pcm_lib_ioctl,
 646         .hw_params =            snd_card_saa7134_hw_params,
 647         .hw_free =              snd_card_saa7134_hw_free,
 648         .prepare =              snd_card_saa7134_capture_prepare,
 649         .trigger =              snd_card_saa7134_capture_trigger,
 650         .pointer =              snd_card_saa7134_capture_pointer,
 651 };
 652
 653 /*
 654  * ALSA PCM setup
 655  *
 656  *   Called when initializing the board. Sets up the name and hooks up
 657  *  the callbacks
 658  *
 659  */
 660
 661 static int snd_card_saa7134_pcm(snd_card_saa7134_t *saa7134, int device)
 662 {
 663         snd_pcm_t *pcm;
 664         int err;
 665
 666         if ((err = snd_pcm_new(saa7134->card, "SAA7134 PCM", device, 0, 1, &pcm)) < 0)
 667                 return err;
 668         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_card_saa7134_capture_ops);
 669         pcm->private_data = saa7134;
 670         pcm->info_flags = 0;
 671         strcpy(pcm->name, "SAA7134 PCM");
 672         return 0;
 673 }
 674
 675 #define SAA713x_VOLUME(xname, xindex, addr) \
 676 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
 677   .info = snd_saa7134_volume_info, \
 678   .get = snd_saa7134_volume_get, .put = snd_saa7134_volume_put, \
 679   .private_value = addr }
 680
 681 static int snd_saa7134_volume_info(snd_kcontrol_t * kcontrol, snd_ctl_elem_info_t * uinfo)
 682 {
 683         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 684         uinfo->count = 2;
 685         uinfo->value.integer.min = 0;
 686         uinfo->value.integer.max = 20;
 687         return 0;
 688 }
 689
 690 static int snd_saa7134_volume_get(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
 691 {
 692         snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol);
 693         int addr = kcontrol->private_value;
 694
 695         ucontrol->value.integer.value[0] = chip->mixer_volume[addr][0];
 696         ucontrol->value.integer.value[1] = chip->mixer_volume[addr][1];
 697         return 0;
 698 }
 699
 700 static int snd_saa7134_volume_put(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
 701 {
 702         snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol);
 703         int change, addr = kcontrol->private_value;
 704         int left, right;
 705
 706         left = ucontrol->value.integer.value[0];
 707         if (left < 0)
 708                 left = 0;
 709         if (left > 20)
 710                 left = 20;
 711         right = ucontrol->value.integer.value[1];
 712         if (right < 0)
 713                 right = 0;
 714         if (right > 20)
 715                 right = 20;
 716         spin_lock_irq(&chip->mixer_lock);
 717         change = chip->mixer_volume[addr][0] != left ||
 718                  chip->mixer_volume[addr][1] != right;
 719         chip->mixer_volume[addr][0] = left;
 720         chip->mixer_volume[addr][1] = right;
 721         spin_unlock_irq(&chip->mixer_lock);
 722         return change;
 723 }
 724
 725 #define SAA713x_CAPSRC(xname, xindex, addr) \
 726 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
 727   .info = snd_saa7134_capsrc_info, \
 728   .get = snd_saa7134_capsrc_get, .put = snd_saa7134_capsrc_put, \
 729   .private_value = addr }
 730
 731 static int snd_saa7134_capsrc_info(snd_kcontrol_t * kcontrol, snd_ctl_elem_info_t * uinfo)
 732 {
 733         uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
 734         uinfo->count = 2;
 735         uinfo->value.integer.min = 0;
 736         uinfo->value.integer.max = 1;
 737         return 0;
 738 }
 739
 740 static int snd_saa7134_capsrc_get(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
 741 {
 742         snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol);
 743         int addr = kcontrol->private_value;
 744
 745         spin_lock_irq(&chip->mixer_lock);
 746         ucontrol->value.integer.value[0] = chip->capture_source[addr][0];
 747         ucontrol->value.integer.value[1] = chip->capture_source[addr][1];
 748         spin_unlock_irq(&chip->mixer_lock);
 749
 750         return 0;
 751 }
 752
 753 static int snd_saa7134_capsrc_put(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
 754 {
 755         snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol);
 756         int change, addr = kcontrol->private_value;
 757         int left, right;
 758         u32 anabar, xbarin;
 759         int analog_io, rate;
 760         struct saa7134_dev *dev;
 761
 762         dev = chip->dev;
 763
 764         left = ucontrol->value.integer.value[0] & 1;
 765         right = ucontrol->value.integer.value[1] & 1;
 766         spin_lock_irq(&chip->mixer_lock);
 767
 768         change = chip->capture_source[addr][0] != left ||
 769                  chip->capture_source[addr][1] != right;
 770         chip->capture_source[addr][0] = left;
 771         chip->capture_source[addr][1] = right;
 772         dev->dmasound.input=addr;
 773         spin_unlock_irq(&chip->mixer_lock);
 774
 775
 776         if (change) {
 777           switch (dev->pci->device) {
 778
 779            case PCI_DEVICE_ID_PHILIPS_SAA7134:
 780                 switch (addr) {
 781                         case MIXER_ADDR_TVTUNER:
 782                                 saa_andorb(SAA7134_AUDIO_FORMAT_CTRL, 0xc0, 0xc0);
 783                                 saa_andorb(SAA7134_SIF_SAMPLE_FREQ,   0x03, 0x00);
 784                                 break;
 785                         case MIXER_ADDR_LINE1:
 786                         case MIXER_ADDR_LINE2:
 787                                 analog_io = (MIXER_ADDR_LINE1 == addr) ? 0x00 : 0x08;
 788                                 rate = (32000 == dev->dmasound.rate) ? 0x01 : 0x03;
 789                                 saa_andorb(SAA7134_ANALOG_IO_SELECT,  0x08, analog_io);
 790                                 saa_andorb(SAA7134_AUDIO_FORMAT_CTRL, 0xc0, 0x80);
 791                                 saa_andorb(SAA7134_SIF_SAMPLE_FREQ,   0x03, rate);
 792                                 break;
 793                 }
 794
 795                 break;
 796            case PCI_DEVICE_ID_PHILIPS_SAA7133:
 797            case PCI_DEVICE_ID_PHILIPS_SAA7135:
 798                 xbarin = 0x03; // adc
 799                 anabar = 0;
 800                 switch (addr) {
 801                         case MIXER_ADDR_TVTUNER:
 802                                 xbarin = 0; // Demodulator
 803                                 anabar = 2; // DACs
 804                                 break;
 805                         case MIXER_ADDR_LINE1:
 806                                 anabar = 0;  // aux1, aux1
 807                                 break;
 808                         case MIXER_ADDR_LINE2:
 809                                 anabar = 9;  // aux2, aux2
 810                                 break;
 811                 }
 812
 813                 /* output xbar always main channel */
 814                 saa_dsp_writel(dev, SAA7133_DIGITAL_OUTPUT_SEL1, 0xbbbb10);
 815
 816                 if (left || right) { // We've got data, turn the input on
 817                   saa_dsp_writel(dev, SAA7133_DIGITAL_INPUT_XBAR1, xbarin);
 818                   saa_writel(SAA7133_ANALOG_IO_SELECT, anabar);
 819                 } else {
 820                   saa_dsp_writel(dev, SAA7133_DIGITAL_INPUT_XBAR1, 0);
 821                   saa_writel(SAA7133_ANALOG_IO_SELECT, 0);
 822                 }
 823                 break;
 824           }
 825         }
 826
 827         return change;
 828 }
 829
 830 static snd_kcontrol_new_t snd_saa7134_controls[] = {
 831 SAA713x_VOLUME("Video Volume", 0, MIXER_ADDR_TVTUNER),
 832 SAA713x_CAPSRC("Video Capture Switch", 0, MIXER_ADDR_TVTUNER),
 833 SAA713x_VOLUME("Line Volume", 1, MIXER_ADDR_LINE1),
 834 SAA713x_CAPSRC("Line Capture Switch", 1, MIXER_ADDR_LINE1),
 835 SAA713x_VOLUME("Line Volume", 2, MIXER_ADDR_LINE2),
 836 SAA713x_CAPSRC("Line Capture Switch", 2, MIXER_ADDR_LINE2),
 837 };
 838
 839 /*
 840  * ALSA mixer setup
 841  *
 842  *   Called when initializing the board. Sets up the name and hooks up
 843  *  the callbacks
 844  *
 845  */
 846
 847 static int snd_card_saa7134_new_mixer(snd_card_saa7134_t * chip)
 848 {
 849         snd_card_t *card = chip->card;
 850         unsigned int idx;
 851         int err;
 852
 853         snd_assert(chip != NULL, return -EINVAL);
 854         strcpy(card->mixername, "SAA7134 Mixer");
 855
 856         for (idx = 0; idx < ARRAY_SIZE(snd_saa7134_controls); idx++) {
 857                 if ((err = snd_ctl_add(card, snd_ctl_new1(&snd_saa7134_controls[idx], chip))) < 0)
 858                         return err;
 859         }
 860         return 0;
 861 }
 862
 863 static void snd_saa7134_free(snd_card_t * card)
 864 {
 865         snd_card_saa7134_t *chip = card->private_data;
 866
 867         if (chip->dev->dmasound.priv_data == NULL)
 868                 return;
 869
 870         if (chip->irq >= 0) {
 871                 synchronize_irq(chip->irq);
 872                 free_irq(chip->irq, &chip->dev->dmasound);
 873         }
 874
 875         chip->dev->dmasound.priv_data = NULL;
 876
 877 }
 878
 879 /*
 880  * ALSA initialization
 881  *
 882  *   Called by the init routine, once for each saa7134 device present,
 883  *  it creates the basic structures and registers the ALSA devices
 884  *
 885  */
 886
 887 static int alsa_card_saa7134_create(struct saa7134_dev *dev, int devnum)
 888 {
 889
 890         snd_card_t *card;
 891         snd_card_saa7134_t *chip;
 892         int err;
 893
 894
 895         if (devnum >= SNDRV_CARDS)
 896                 return -ENODEV;
 897         if (!enable[devnum])
 898                 return -ENODEV;
 899
 900         card = snd_card_new(index[devnum], id[devnum], THIS_MODULE, sizeof(snd_card_saa7134_t));
 901
 902         if (card == NULL)
 903                 return -ENOMEM;
 904
 905         strcpy(card->driver, "SAA7134");
 906
 907         /* Card "creation" */
 908
 909         card->private_free = snd_saa7134_free;
 910         chip = (snd_card_saa7134_t *) card->private_data;
 911
 912         spin_lock_init(&chip->lock);
 913         spin_lock_init(&chip->mixer_lock);
 914
 915         chip->dev = dev;
 916
 917         chip->card = card;
 918
 919         chip->pci = dev->pci;
 920         chip->iobase = pci_resource_start(dev->pci, 0);
 921
 922
 923         err = request_irq(dev->pci->irq, saa7134_alsa_irq,
 924                                 SA_SHIRQ | SA_INTERRUPT, dev->name,
 925                                 (void*) &dev->dmasound);
 926
 927         if (err < 0) {
 928                 printk(KERN_ERR "%s: can't get IRQ %d for ALSA\n",
 929                         dev->name, dev->pci->irq);
 930                 goto __nodev;
 931         }
 932
 933         chip->irq = dev->pci->irq;
 934
 935         init_MUTEX(&dev->dmasound.lock);
 936
 937         if ((err = snd_card_saa7134_new_mixer(chip)) < 0)
 938                 goto __nodev;
 939
 940         if ((err = snd_card_saa7134_pcm(chip, 0)) < 0)
 941                 goto __nodev;
 942
 943         snd_card_set_dev(card, &chip->pci->dev);
 944
 945         /* End of "creation" */
 946
 947         strcpy(card->shortname, "SAA7134");
 948         sprintf(card->longname, "%s at 0x%lx irq %d",
 949                 chip->dev->name, chip->iobase, chip->irq);
 950
 951         printk(KERN_INFO "%s/alsa: %s registered as card %d\n",dev->name,card->longname,index[devnum]);
 952
 953         if ((err = snd_card_register(card)) == 0) {
 954                 snd_saa7134_cards[devnum] = card;
 955                 return 0;
 956         }
 957
 958 __nodev:
 959         snd_card_free(card);
 960         return err;
 961 }
 962
 963
 964 static int alsa_device_init(struct saa7134_dev *dev)
 965 {
 966         dev->dmasound.priv_data = dev;
 967         alsa_card_saa7134_create(dev,dev->nr);
 968         return 1;
 969 }
 970
 971 static int alsa_device_exit(struct saa7134_dev *dev)
 972 {
 973
 974         snd_card_free(snd_saa7134_cards[dev->nr]);
 975         snd_saa7134_cards[dev->nr] = NULL;
 976         return 1;
 977 }
 978
 979 /*
 980  * Module initializer
 981  *
 982  * Loops through present saa7134 cards, and assigns an ALSA device
 983  * to each one
 984  *
 985  */
 986
 987 static int saa7134_alsa_init(void)
 988 {
 989         struct saa7134_dev *dev = NULL;
 990         struct list_head *list;
 991
 992         if (!dmasound_init && !dmasound_exit) {
 993                 dmasound_init = alsa_device_init;
 994                 dmasound_exit = alsa_device_exit;
 995         } else {
 996                 printk(KERN_WARNING "saa7134 ALSA: can't load, DMA sound handler already assigned (probably to OSS)\n");
 997                 return -EBUSY;
 998         }
 999
1000         printk(KERN_INFO "saa7134 ALSA driver for DMA sound loaded\n");
1001
1002         list_for_each(list,&saa7134_devlist) {
1003                 dev = list_entry(list, struct saa7134_dev, devlist);
1004                 if (dev->dmasound.priv_data == NULL) {
1005                         alsa_device_init(dev);
1006                 } else {
1007                         printk(KERN_ERR "saa7134 ALSA: DMA sound is being handled by OSS. ignoring %s\n",dev->name);
1008                         return -EBUSY;
1009                 }
1010         }
1011
1012         if (dev == NULL)
1013                 printk(KERN_INFO "saa7134 ALSA: no saa7134 cards found\n");
1014
1015         return 0;
1016
1017 }
1018
1019 /*
1020  * Module destructor
1021  */
1022
1023 static void saa7134_alsa_exit(void)
1024 {
1025         int idx;
1026
1027         for (idx = 0; idx < SNDRV_CARDS; idx++) {
1028                 snd_card_free(snd_saa7134_cards[idx]);
1029         }
1030
1031         dmasound_init = NULL;
1032         dmasound_exit = NULL;
1033         printk(KERN_INFO "saa7134 ALSA driver for DMA sound unloaded\n");
1034
1035         return;
1036 }
1037
1038 /* We initialize this late, to make sure the sound system is up and running */
1039 late_initcall(saa7134_alsa_init);
1040 module_exit(saa7134_alsa_exit);
1041 MODULE_LICENSE("GPL");
1042 MODULE_AUTHOR("Ricardo Cerqueira");
1043
1044
1045