drivers/staging/cx25821/cx25821-alsa.c

   1 /*
   2  *  Driver for the Conexant CX25821 PCIe bridge
   3  *
   4  *  Copyright (C) 2009 Conexant Systems Inc.
   5  *  Authors  <shu.lin@conexant.com>, <hiep.huynh@conexant.com>
   6  *      Based on SAA713x ALSA driver and CX88 driver
   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/module.h>
  24 #include <linux/init.h>
  25 #include <linux/device.h>
  26 #include <linux/interrupt.h>
  27 #include <linux/vmalloc.h>
  28 #include <linux/dma-mapping.h>
  29 #include <linux/pci.h>
  30 #include <linux/slab.h>
  31
  32 #include <linux/delay.h>
  33 #include <sound/core.h>
  34 #include <sound/pcm.h>
  35 #include <sound/pcm_params.h>
  36 #include <sound/control.h>
  37 #include <sound/initval.h>
  38 #include <sound/tlv.h>
  39
  40 #include "cx25821.h"
  41 #include "cx25821-reg.h"
  42
  43 #define AUDIO_SRAM_CHANNEL      SRAM_CH08
  44
  45 #define dprintk(level, fmt, arg...)     if (debug >= level) \
  46         printk(KERN_INFO "%s/1: " fmt, chip->dev->name , ## arg)
  47
  48 #define dprintk_core(level, fmt, arg...)        if (debug >= level) \
  49         printk(KERN_DEBUG "%s/1: " fmt, chip->dev->name , ## arg)
  50
  51 /****************************************************************************
  52         Data type declarations - Can be moded to a header file later
  53  ****************************************************************************/
  54
  55 static struct snd_card *snd_cx25821_cards[SNDRV_CARDS];
  56 static int devno;
  57
  58 struct cx25821_audio_dev {
  59         struct cx25821_dev *dev;
  60         struct cx25821_dmaqueue q;
  61
  62         /* pci i/o */
  63         struct pci_dev *pci;
  64
  65         /* audio controls */
  66         int irq;
  67
  68         struct snd_card *card;
  69
  70         unsigned long iobase;
  71         spinlock_t reg_lock;
  72         atomic_t count;
  73
  74         unsigned int dma_size;
  75         unsigned int period_size;
  76         unsigned int num_periods;
  77
  78         struct videobuf_dmabuf *dma_risc;
  79
  80         struct cx25821_buffer *buf;
  81
  82         struct snd_pcm_substream *substream;
  83 };
  84
  85
  86 /****************************************************************************
  87                         Module global static vars
  88  ****************************************************************************/
  89
  90 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;      /* Index 0-MAX */
  91 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;       /* ID for this card */
  92 static int enable[SNDRV_CARDS] = { 1, [1 ... (SNDRV_CARDS - 1)] = 1 };
  93
  94 module_param_array(enable, bool, NULL, 0444);
  95 MODULE_PARM_DESC(enable, "Enable cx25821 soundcard. default enabled.");
  96
  97 module_param_array(index, int, NULL, 0444);
  98 MODULE_PARM_DESC(index, "Index value for cx25821 capture interface(s).");
  99
 100 /****************************************************************************
 101                                 Module macros
 102  ****************************************************************************/
 103
 104 MODULE_DESCRIPTION("ALSA driver module for cx25821 based capture cards");
 105 MODULE_AUTHOR("Hiep Huynh");
 106 MODULE_LICENSE("GPL");
 107 MODULE_SUPPORTED_DEVICE("{{Conexant,25821}");   /* "{{Conexant,23881}," */
 108
 109 static unsigned int debug;
 110 module_param(debug, int, 0644);
 111 MODULE_PARM_DESC(debug, "enable debug messages");
 112
 113 /****************************************************************************
 114                         Module specific funtions
 115  ****************************************************************************/
 116 /* Constants taken from cx88-reg.h */
 117 #define AUD_INT_DN_RISCI1       (1 <<  0)
 118 #define AUD_INT_UP_RISCI1       (1 <<  1)
 119 #define AUD_INT_RDS_DN_RISCI1   (1 <<  2)
 120 #define AUD_INT_DN_RISCI2       (1 <<  4)       /* yes, 3 is skipped */
 121 #define AUD_INT_UP_RISCI2       (1 <<  5)
 122 #define AUD_INT_RDS_DN_RISCI2   (1 <<  6)
 123 #define AUD_INT_DN_SYNC         (1 << 12)
 124 #define AUD_INT_UP_SYNC         (1 << 13)
 125 #define AUD_INT_RDS_DN_SYNC     (1 << 14)
 126 #define AUD_INT_OPC_ERR         (1 << 16)
 127 #define AUD_INT_BER_IRQ         (1 << 20)
 128 #define AUD_INT_MCHG_IRQ        (1 << 21)
 129 #define GP_COUNT_CONTROL_RESET  0x3
 130
 131 #define PCI_MSK_AUD_EXT   (1 <<  4)
 132 #define PCI_MSK_AUD_INT   (1 <<  3)
 133 /*
 134  * BOARD Specific: Sets audio DMA
 135  */
 136
 137 static int _cx25821_start_audio_dma(struct cx25821_audio_dev *chip)
 138 {
 139         struct cx25821_buffer *buf = chip->buf;
 140         struct cx25821_dev *dev = chip->dev;
 141         struct sram_channel *audio_ch =
 142             &cx25821_sram_channels[AUDIO_SRAM_CHANNEL];
 143         u32 tmp = 0;
 144
 145         /* enable output on the GPIO 0 for the MCLK ADC (Audio) */
 146         cx25821_set_gpiopin_direction(chip->dev, 0, 0);
 147
 148         /* Make sure RISC/FIFO are off before changing FIFO/RISC settings */
 149         cx_clear(AUD_INT_DMA_CTL,
 150                  FLD_AUD_DST_A_RISC_EN | FLD_AUD_DST_A_FIFO_EN);
 151
 152         /* setup fifo + format - out channel */
 153         cx25821_sram_channel_setup_audio(chip->dev, audio_ch, buf->bpl,
 154                                          buf->risc.dma);
 155
 156         /* sets bpl size */
 157         cx_write(AUD_A_LNGTH, buf->bpl);
 158
 159         /* reset counter */
 160         /* GP_COUNT_CONTROL_RESET = 0x3 */
 161         cx_write(AUD_A_GPCNT_CTL, GP_COUNT_CONTROL_RESET);
 162         atomic_set(&chip->count, 0);
 163
 164         /* Set the input mode to 16-bit */
 165         tmp = cx_read(AUD_A_CFG);
 166         cx_write(AUD_A_CFG,
 167                  tmp | FLD_AUD_DST_PK_MODE | FLD_AUD_DST_ENABLE |
 168                  FLD_AUD_CLK_ENABLE);
 169
 170         /* printk(KERN_INFO "DEBUG: Start audio DMA, %d B/line,"
 171                                 "cmds_start(0x%x)= %d lines/FIFO, %d periods, "
 172                                 "%d byte buffer\n", buf->bpl,
 173                                 audio_ch->cmds_start,
 174                                 cx_read(audio_ch->cmds_start + 12)>>1,
 175                                 chip->num_periods, buf->bpl *chip->num_periods);
 176         */
 177
 178         /* Enables corresponding bits at AUD_INT_STAT */
 179         cx_write(AUD_A_INT_MSK,
 180                  FLD_AUD_DST_RISCI1 | FLD_AUD_DST_OF | FLD_AUD_DST_SYNC |
 181                  FLD_AUD_DST_OPC_ERR);
 182
 183         /* Clean any pending interrupt bits already set */
 184         cx_write(AUD_A_INT_STAT, ~0);
 185
 186         /* enable audio irqs */
 187         cx_set(PCI_INT_MSK, chip->dev->pci_irqmask | PCI_MSK_AUD_INT);
 188
 189         /* Turn on audio downstream fifo and risc enable 0x101 */
 190         tmp = cx_read(AUD_INT_DMA_CTL);
 191         cx_set(AUD_INT_DMA_CTL,
 192                tmp | (FLD_AUD_DST_A_RISC_EN | FLD_AUD_DST_A_FIFO_EN));
 193
 194         mdelay(100);
 195         return 0;
 196 }
 197
 198 /*
 199  * BOARD Specific: Resets audio DMA
 200  */
 201 static int _cx25821_stop_audio_dma(struct cx25821_audio_dev *chip)
 202 {
 203         struct cx25821_dev *dev = chip->dev;
 204
 205         /* stop dma */
 206         cx_clear(AUD_INT_DMA_CTL,
 207                  FLD_AUD_DST_A_RISC_EN | FLD_AUD_DST_A_FIFO_EN);
 208
 209         /* disable irqs */
 210         cx_clear(PCI_INT_MSK, PCI_MSK_AUD_INT);
 211         cx_clear(AUD_A_INT_MSK,
 212                  AUD_INT_OPC_ERR | AUD_INT_DN_SYNC | AUD_INT_DN_RISCI2 |
 213                  AUD_INT_DN_RISCI1);
 214
 215         return 0;
 216 }
 217
 218 #define MAX_IRQ_LOOP 50
 219
 220 /*
 221  * BOARD Specific: IRQ dma bits
 222  */
 223 static char *cx25821_aud_irqs[32] = {
 224         "dn_risci1", "up_risci1", "rds_dn_risc1",       /* 0-2 */
 225         NULL,                   /* reserved */
 226         "dn_risci2", "up_risci2", "rds_dn_risc2",       /* 4-6 */
 227         NULL,                   /* reserved */
 228         "dnf_of", "upf_uf", "rds_dnf_uf",       /* 8-10 */
 229         NULL,                   /* reserved */
 230         "dn_sync", "up_sync", "rds_dn_sync",    /* 12-14 */
 231         NULL,                   /* reserved */
 232         "opc_err", "par_err", "rip_err",        /* 16-18 */
 233         "pci_abort", "ber_irq", "mchg_irq"      /* 19-21 */
 234 };
 235
 236 /*
 237  * BOARD Specific: Threats IRQ audio specific calls
 238  */
 239 static void cx25821_aud_irq(struct cx25821_audio_dev *chip, u32 status,
 240                             u32 mask)
 241 {
 242         struct cx25821_dev *dev = chip->dev;
 243
 244         if (0 == (status & mask))
 245                 return;
 246
 247         cx_write(AUD_A_INT_STAT, status);
 248         if (debug > 1 || (status & mask & ~0xff))
 249                 cx25821_print_irqbits(dev->name, "irq aud",
 250                                       cx25821_aud_irqs,
 251                                       ARRAY_SIZE(cx25821_aud_irqs), status,
 252                                       mask);
 253
 254         /* risc op code error */
 255         if (status & AUD_INT_OPC_ERR) {
 256                 printk(KERN_WARNING "WARNING %s/1: Audio risc op code error\n",
 257                        dev->name);
 258
 259                 cx_clear(AUD_INT_DMA_CTL,
 260                          FLD_AUD_DST_A_RISC_EN | FLD_AUD_DST_A_FIFO_EN);
 261                 cx25821_sram_channel_dump_audio(dev,
 262                                                 &cx25821_sram_channels
 263                                                 [AUDIO_SRAM_CHANNEL]);
 264         }
 265         if (status & AUD_INT_DN_SYNC) {
 266                 printk(KERN_WARNING "WARNING %s: Downstream sync error!\n",
 267                        dev->name);
 268                 cx_write(AUD_A_GPCNT_CTL, GP_COUNT_CONTROL_RESET);
 269                 return;
 270         }
 271
 272         /* risc1 downstream */
 273         if (status & AUD_INT_DN_RISCI1) {
 274                 atomic_set(&chip->count, cx_read(AUD_A_GPCNT));
 275                 snd_pcm_period_elapsed(chip->substream);
 276         }
 277 }
 278
 279 /*
 280  * BOARD Specific: Handles IRQ calls
 281  */
 282 static irqreturn_t cx25821_irq(int irq, void *dev_id)
 283 {
 284         struct cx25821_audio_dev *chip = dev_id;
 285         struct cx25821_dev *dev = chip->dev;
 286         u32 status, pci_status;
 287         u32 audint_status, audint_mask;
 288         int loop, handled = 0;
 289         int audint_count = 0;
 290
 291         audint_status = cx_read(AUD_A_INT_STAT);
 292         audint_mask = cx_read(AUD_A_INT_MSK);
 293         audint_count = cx_read(AUD_A_GPCNT);
 294         status = cx_read(PCI_INT_STAT);
 295
 296         for (loop = 0; loop < 1; loop++) {
 297                 status = cx_read(PCI_INT_STAT);
 298                 if (0 == status) {
 299                         status = cx_read(PCI_INT_STAT);
 300                         audint_status = cx_read(AUD_A_INT_STAT);
 301                         audint_mask = cx_read(AUD_A_INT_MSK);
 302
 303                         if (status) {
 304                                 handled = 1;
 305                                 cx_write(PCI_INT_STAT, status);
 306
 307                                 cx25821_aud_irq(chip, audint_status,
 308                                                 audint_mask);
 309                                 break;
 310                         } else
 311                                 goto out;
 312                 }
 313
 314                 handled = 1;
 315                 cx_write(PCI_INT_STAT, status);
 316
 317                 cx25821_aud_irq(chip, audint_status, audint_mask);
 318         }
 319
 320         pci_status = cx_read(PCI_INT_STAT);
 321
 322         if (handled)
 323                 cx_write(PCI_INT_STAT, pci_status);
 324
 325 out:
 326         return IRQ_RETVAL(handled);
 327 }
 328
 329 static int dsp_buffer_free(struct cx25821_audio_dev *chip)
 330 {
 331         BUG_ON(!chip->dma_size);
 332
 333         dprintk(2, "Freeing buffer\n");
 334         videobuf_sg_dma_unmap(&chip->pci->dev, chip->dma_risc);
 335         videobuf_dma_free(chip->dma_risc);
 336         btcx_riscmem_free(chip->pci, &chip->buf->risc);
 337         kfree(chip->buf);
 338
 339         chip->dma_risc = NULL;
 340         chip->dma_size = 0;
 341
 342         return 0;
 343 }
 344
 345 /****************************************************************************
 346                                 ALSA PCM Interface
 347  ****************************************************************************/
 348
 349 /*
 350  * Digital hardware definition
 351  */
 352 #define DEFAULT_FIFO_SIZE       384
 353 static struct snd_pcm_hardware snd_cx25821_digital_hw = {
 354         .info = SNDRV_PCM_INFO_MMAP |
 355             SNDRV_PCM_INFO_INTERLEAVED |
 356             SNDRV_PCM_INFO_BLOCK_TRANSFER | SNDRV_PCM_INFO_MMAP_VALID,
 357         .formats = SNDRV_PCM_FMTBIT_S16_LE,
 358
 359         .rates = SNDRV_PCM_RATE_48000,
 360         .rate_min = 48000,
 361         .rate_max = 48000,
 362         .channels_min = 2,
 363         .channels_max = 2,
 364         /* Analog audio output will be full of clicks and pops if there
 365            are not exactly four lines in the SRAM FIFO buffer.  */
 366         .period_bytes_min = DEFAULT_FIFO_SIZE / 3,
 367         .period_bytes_max = DEFAULT_FIFO_SIZE / 3,
 368         .periods_min = 1,
 369         .periods_max = AUDIO_LINE_SIZE,
 370         /* 128 * 128 = 16384 = 1024 * 16 */
 371         .buffer_bytes_max = (AUDIO_LINE_SIZE * AUDIO_LINE_SIZE),
 372 };
 373
 374 /*
 375  * audio pcm capture open callback
 376  */
 377 static int snd_cx25821_pcm_open(struct snd_pcm_substream *substream)
 378 {
 379         struct cx25821_audio_dev *chip = snd_pcm_substream_chip(substream);
 380         struct snd_pcm_runtime *runtime = substream->runtime;
 381         int err;
 382         unsigned int bpl = 0;
 383
 384         if (!chip) {
 385                 printk(KERN_ERR "DEBUG: cx25821 can't find device struct."
 386                        " Can't proceed with open\n");
 387                 return -ENODEV;
 388         }
 389
 390         err =
 391             snd_pcm_hw_constraint_pow2(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS);
 392         if (err < 0)
 393                 goto _error;
 394
 395         chip->substream = substream;
 396
 397         runtime->hw = snd_cx25821_digital_hw;
 398
 399         if (cx25821_sram_channels[AUDIO_SRAM_CHANNEL].fifo_size !=
 400             DEFAULT_FIFO_SIZE) {
 401                 /* since there are 3 audio Clusters */
 402                 bpl = cx25821_sram_channels[AUDIO_SRAM_CHANNEL].fifo_size / 3;
 403                 bpl &= ~7;      /* must be multiple of 8 */
 404
 405                 if (bpl > AUDIO_LINE_SIZE)
 406                         bpl = AUDIO_LINE_SIZE;
 407
 408                 runtime->hw.period_bytes_min = bpl;
 409                 runtime->hw.period_bytes_max = bpl;
 410         }
 411
 412         return 0;
 413 _error:
 414         dprintk(1, "Error opening PCM!\n");
 415         return err;
 416 }
 417
 418 /*
 419  * audio close callback
 420  */
 421 static int snd_cx25821_close(struct snd_pcm_substream *substream)
 422 {
 423         return 0;
 424 }
 425
 426 /*
 427  * hw_params callback
 428  */
 429 static int snd_cx25821_hw_params(struct snd_pcm_substream *substream,
 430                                  struct snd_pcm_hw_params *hw_params)
 431 {
 432         struct cx25821_audio_dev *chip = snd_pcm_substream_chip(substream);
 433         struct videobuf_dmabuf *dma;
 434
 435         struct cx25821_buffer *buf;
 436         int ret;
 437
 438         if (substream->runtime->dma_area) {
 439                 dsp_buffer_free(chip);
 440                 substream->runtime->dma_area = NULL;
 441         }
 442
 443         chip->period_size = params_period_bytes(hw_params);
 444         chip->num_periods = params_periods(hw_params);
 445         chip->dma_size = chip->period_size * params_periods(hw_params);
 446
 447         BUG_ON(!chip->dma_size);
 448         BUG_ON(chip->num_periods & (chip->num_periods - 1));
 449
 450         buf = videobuf_sg_alloc(sizeof(*buf));
 451         if (NULL == buf)
 452                 return -ENOMEM;
 453
 454         if (chip->period_size > AUDIO_LINE_SIZE)
 455                 chip->period_size = AUDIO_LINE_SIZE;
 456
 457         buf->vb.memory = V4L2_MEMORY_MMAP;
 458         buf->vb.field = V4L2_FIELD_NONE;
 459         buf->vb.width = chip->period_size;
 460         buf->bpl = chip->period_size;
 461         buf->vb.height = chip->num_periods;
 462         buf->vb.size = chip->dma_size;
 463
 464         dma = videobuf_to_dma(&buf->vb);
 465         videobuf_dma_init(dma);
 466
 467         ret = videobuf_dma_init_kernel(dma, PCI_DMA_FROMDEVICE,
 468                                        (PAGE_ALIGN(buf->vb.size) >>
 469                                         PAGE_SHIFT));
 470         if (ret < 0)
 471                 goto error;
 472
 473         ret = videobuf_sg_dma_map(&chip->pci->dev, dma);
 474         if (ret < 0)
 475                 goto error;
 476
 477         ret =
 478             cx25821_risc_databuffer_audio(chip->pci, &buf->risc, dma->sglist,
 479                                           buf->vb.width, buf->vb.height, 1);
 480         if (ret < 0) {
 481                 printk(KERN_INFO
 482                         "DEBUG: ERROR after cx25821_risc_databuffer_audio()\n");
 483                 goto error;
 484         }
 485
 486         /* Loop back to start of program */
 487         buf->risc.jmp[0] = cpu_to_le32(RISC_JUMP | RISC_IRQ1 | RISC_CNT_INC);
 488         buf->risc.jmp[1] = cpu_to_le32(buf->risc.dma);
 489         buf->risc.jmp[2] = cpu_to_le32(0);      /* bits 63-32 */
 490
 491         buf->vb.state = VIDEOBUF_PREPARED;
 492
 493         chip->buf = buf;
 494         chip->dma_risc = dma;
 495
 496         substream->runtime->dma_area = chip->dma_risc->vmalloc;
 497         substream->runtime->dma_bytes = chip->dma_size;
 498         substream->runtime->dma_addr = 0;
 499
 500         return 0;
 501
 502 error:
 503         kfree(buf);
 504         return ret;
 505 }
 506
 507 /*
 508  * hw free callback
 509  */
 510 static int snd_cx25821_hw_free(struct snd_pcm_substream *substream)
 511 {
 512         struct cx25821_audio_dev *chip = snd_pcm_substream_chip(substream);
 513
 514         if (substream->runtime->dma_area) {
 515                 dsp_buffer_free(chip);
 516                 substream->runtime->dma_area = NULL;
 517         }
 518
 519         return 0;
 520 }
 521
 522 /*
 523  * prepare callback
 524  */
 525 static int snd_cx25821_prepare(struct snd_pcm_substream *substream)
 526 {
 527         return 0;
 528 }
 529
 530 /*
 531  * trigger callback
 532  */
 533 static int snd_cx25821_card_trigger(struct snd_pcm_substream *substream,
 534                                     int cmd)
 535 {
 536         struct cx25821_audio_dev *chip = snd_pcm_substream_chip(substream);
 537         int err = 0;
 538
 539         /* Local interrupts are already disabled by ALSA */
 540         spin_lock(&chip->reg_lock);
 541
 542         switch (cmd) {
 543         case SNDRV_PCM_TRIGGER_START:
 544                 err = _cx25821_start_audio_dma(chip);
 545                 break;
 546         case SNDRV_PCM_TRIGGER_STOP:
 547                 err = _cx25821_stop_audio_dma(chip);
 548                 break;
 549         default:
 550                 err = -EINVAL;
 551                 break;
 552         }
 553
 554         spin_unlock(&chip->reg_lock);
 555
 556         return err;
 557 }
 558
 559 /*
 560  * pointer callback
 561  */
 562 static snd_pcm_uframes_t snd_cx25821_pointer(struct snd_pcm_substream
 563                                              *substream)
 564 {
 565         struct cx25821_audio_dev *chip = snd_pcm_substream_chip(substream);
 566         struct snd_pcm_runtime *runtime = substream->runtime;
 567         u16 count;
 568
 569         count = atomic_read(&chip->count);
 570
 571         return runtime->period_size * (count & (runtime->periods - 1));
 572 }
 573
 574 /*
 575  * page callback (needed for mmap)
 576  */
 577 static struct page *snd_cx25821_page(struct snd_pcm_substream *substream,
 578                                      unsigned long offset)
 579 {
 580         void *pageptr = substream->runtime->dma_area + offset;
 581
 582         return vmalloc_to_page(pageptr);
 583 }
 584
 585 /*
 586  * operators
 587  */
 588 static struct snd_pcm_ops snd_cx25821_pcm_ops = {
 589         .open = snd_cx25821_pcm_open,
 590         .close = snd_cx25821_close,
 591         .ioctl = snd_pcm_lib_ioctl,
 592         .hw_params = snd_cx25821_hw_params,
 593         .hw_free = snd_cx25821_hw_free,
 594         .prepare = snd_cx25821_prepare,
 595         .trigger = snd_cx25821_card_trigger,
 596         .pointer = snd_cx25821_pointer,
 597         .page = snd_cx25821_page,
 598 };
 599
 600 /*
 601  * ALSA create a PCM device:  Called when initializing the board.
 602  * Sets up the name and hooks up the callbacks
 603  */
 604 static int snd_cx25821_pcm(struct cx25821_audio_dev *chip, int device,
 605                            char *name)
 606 {
 607         struct snd_pcm *pcm;
 608         int err;
 609
 610         err = snd_pcm_new(chip->card, name, device, 0, 1, &pcm);
 611         if (err < 0) {
 612                 printk(KERN_INFO "ERROR: FAILED snd_pcm_new() in %s\n",
 613                        __func__);
 614                 return err;
 615         }
 616         pcm->private_data = chip;
 617         pcm->info_flags = 0;
 618         strcpy(pcm->name, name);
 619         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_cx25821_pcm_ops);
 620
 621         return 0;
 622 }
 623
 624 /****************************************************************************
 625                         Basic Flow for Sound Devices
 626  ****************************************************************************/
 627
 628 /*
 629  * PCI ID Table - 14f1:8801 and 14f1:8811 means function 1: Audio
 630  * Only boards with eeprom and byte 1 at eeprom=1 have it
 631  */
 632
 633 static struct pci_device_id cx25821_audio_pci_tbl[] __devinitdata = {
 634         {0x14f1, 0x0920, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
 635         {0,}
 636 };
 637
 638 MODULE_DEVICE_TABLE(pci, cx25821_audio_pci_tbl);
 639
 640 /*
 641  * Not used in the function snd_cx25821_dev_free so removing
 642  * from the file.
 643  */
 644 /*
 645 static int snd_cx25821_free(struct cx25821_audio_dev *chip)
 646 {
 647         if (chip->irq >= 0)
 648                 free_irq(chip->irq, chip);
 649
 650         cx25821_dev_unregister(chip->dev);
 651         pci_disable_device(chip->pci);
 652
 653         return 0;
 654 }
 655 */
 656
 657 /*
 658  * Component Destructor
 659  */
 660 static void snd_cx25821_dev_free(struct snd_card *card)
 661 {
 662         struct cx25821_audio_dev *chip = card->private_data;
 663
 664         /* snd_cx25821_free(chip); */
 665         snd_card_free(chip->card);
 666 }
 667
 668 /*
 669  * Alsa Constructor - Component probe
 670  */
 671 static int cx25821_audio_initdev(struct cx25821_dev *dev)
 672 {
 673         struct snd_card *card;
 674         struct cx25821_audio_dev *chip;
 675         int err;
 676
 677         if (devno >= SNDRV_CARDS) {
 678                 printk(KERN_INFO "DEBUG ERROR: devno >= SNDRV_CARDS %s\n",
 679                        __func__);
 680                 return -ENODEV;
 681         }
 682
 683         if (!enable[devno]) {
 684                 ++devno;
 685                 printk(KERN_INFO "DEBUG ERROR: !enable[devno] %s\n", __func__);
 686                 return -ENOENT;
 687         }
 688
 689         err = snd_card_create(index[devno], id[devno], THIS_MODULE,
 690                          sizeof(struct cx25821_audio_dev), &card);
 691         if (err < 0) {
 692                 printk(KERN_INFO
 693                        "DEBUG ERROR: cannot create snd_card_new in %s\n",
 694                        __func__);
 695                 return err;
 696         }
 697
 698         strcpy(card->driver, "cx25821");
 699
 700         /* Card "creation" */
 701         card->private_free = snd_cx25821_dev_free;
 702         chip = (struct cx25821_audio_dev *) card->private_data;
 703         spin_lock_init(&chip->reg_lock);
 704
 705         chip->dev = dev;
 706         chip->card = card;
 707         chip->pci = dev->pci;
 708         chip->iobase = pci_resource_start(dev->pci, 0);
 709
 710         chip->irq = dev->pci->irq;
 711
 712         err = request_irq(dev->pci->irq, cx25821_irq,
 713                           IRQF_SHARED | IRQF_DISABLED, chip->dev->name, chip);
 714
 715         if (err < 0) {
 716                 printk(KERN_ERR "ERROR %s: can't get IRQ %d for ALSA\n",
 717                        chip->dev->name, dev->pci->irq);
 718                 goto error;
 719         }
 720
 721         err = snd_cx25821_pcm(chip, 0, "cx25821 Digital");
 722         if (err < 0) {
 723                 printk(KERN_INFO
 724                        "DEBUG ERROR: cannot create snd_cx25821_pcm %s\n",
 725                        __func__);
 726                 goto error;
 727         }
 728
 729         snd_card_set_dev(card, &chip->pci->dev);
 730
 731         strcpy(card->shortname, "cx25821");
 732         sprintf(card->longname, "%s at 0x%lx irq %d", chip->dev->name,
 733                 chip->iobase, chip->irq);
 734         strcpy(card->mixername, "CX25821");
 735
 736         printk(KERN_INFO "%s/%i: ALSA support for cx25821 boards\n",
 737                card->driver, devno);
 738
 739         err = snd_card_register(card);
 740         if (err < 0) {
 741                 printk(KERN_INFO "DEBUG ERROR: cannot register sound card %s\n",
 742                        __func__);
 743                 goto error;
 744         }
 745
 746         snd_cx25821_cards[devno] = card;
 747
 748         devno++;
 749         return 0;
 750
 751 error:
 752         snd_card_free(card);
 753         return err;
 754 }
 755
 756 /****************************************************************************
 757                                 LINUX MODULE INIT
 758  ****************************************************************************/
 759 static void cx25821_audio_fini(void)
 760 {
 761         snd_card_free(snd_cx25821_cards[0]);
 762 }
 763
 764 /*
 765  * Module initializer
 766  *
 767  * Loops through present saa7134 cards, and assigns an ALSA device
 768  * to each one
 769  *
 770  */
 771 static int cx25821_alsa_init(void)
 772 {
 773         struct cx25821_dev *dev = NULL;
 774         struct list_head *list;
 775
 776         list_for_each(list, &cx25821_devlist) {
 777                 dev = list_entry(list, struct cx25821_dev, devlist);
 778                 cx25821_audio_initdev(dev);
 779         }
 780
 781         if (dev == NULL)
 782                 printk(KERN_INFO
 783                        "cx25821 ERROR ALSA: no cx25821 cards found\n");
 784
 785         return 0;
 786
 787 }
 788
 789 late_initcall(cx25821_alsa_init);
 790 module_exit(cx25821_audio_fini);
 791
 792 /* ----------------------------------------------------------- */
 793 /*
 794  * Local variables:
 795  * c-basic-offset: 8
 796  * End:
 797  */