release/src-rt-6.x.4708/linux/linux-2.6.36/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_buffer {
  59         unsigned int bpl;
  60         struct btcx_riscmem risc;
  61         struct videobuf_dmabuf dma;
  62 };
  63
  64 struct cx25821_audio_dev {
  65         struct cx25821_dev *dev;
  66         struct cx25821_dmaqueue q;
  67
  68         /* pci i/o */
  69         struct pci_dev *pci;
  70
  71         /* audio controls */
  72         int irq;
  73
  74         struct snd_card *card;
  75
  76         unsigned long iobase;
  77         spinlock_t reg_lock;
  78         atomic_t count;
  79
  80         unsigned int dma_size;
  81         unsigned int period_size;
  82         unsigned int num_periods;
  83
  84         struct videobuf_dmabuf *dma_risc;
  85
  86         struct cx25821_audio_buffer *buf;
  87
  88         struct snd_pcm_substream *substream;
  89 };
  90
  91
  92 /****************************************************************************
  93                         Module global static vars
  94  ****************************************************************************/
  95
  96 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;      /* Index 0-MAX */
  97 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;       /* ID for this card */
  98 static int enable[SNDRV_CARDS] = { 1, [1 ... (SNDRV_CARDS - 1)] = 1 };
  99
 100 module_param_array(enable, bool, NULL, 0444);
 101 MODULE_PARM_DESC(enable, "Enable cx25821 soundcard. default enabled.");
 102
 103 module_param_array(index, int, NULL, 0444);
 104 MODULE_PARM_DESC(index, "Index value for cx25821 capture interface(s).");
 105
 106 /****************************************************************************
 107                                 Module macros
 108  ****************************************************************************/
 109
 110 MODULE_DESCRIPTION("ALSA driver module for cx25821 based capture cards");
 111 MODULE_AUTHOR("Hiep Huynh");
 112 MODULE_LICENSE("GPL");
 113 MODULE_SUPPORTED_DEVICE("{{Conexant,25821}");   /* "{{Conexant,23881}," */
 114
 115 static unsigned int debug;
 116 module_param(debug, int, 0644);
 117 MODULE_PARM_DESC(debug, "enable debug messages");
 118
 119 /****************************************************************************
 120                         Module specific funtions
 121  ****************************************************************************/
 122 /* Constants taken from cx88-reg.h */
 123 #define AUD_INT_DN_RISCI1       (1 <<  0)
 124 #define AUD_INT_UP_RISCI1       (1 <<  1)
 125 #define AUD_INT_RDS_DN_RISCI1   (1 <<  2)
 126 #define AUD_INT_DN_RISCI2       (1 <<  4)       /* yes, 3 is skipped */
 127 #define AUD_INT_UP_RISCI2       (1 <<  5)
 128 #define AUD_INT_RDS_DN_RISCI2   (1 <<  6)
 129 #define AUD_INT_DN_SYNC         (1 << 12)
 130 #define AUD_INT_UP_SYNC         (1 << 13)
 131 #define AUD_INT_RDS_DN_SYNC     (1 << 14)
 132 #define AUD_INT_OPC_ERR         (1 << 16)
 133 #define AUD_INT_BER_IRQ         (1 << 20)
 134 #define AUD_INT_MCHG_IRQ        (1 << 21)
 135 #define GP_COUNT_CONTROL_RESET  0x3
 136
 137 #define PCI_MSK_AUD_EXT   (1 <<  4)
 138 #define PCI_MSK_AUD_INT   (1 <<  3)
 139 /*
 140  * BOARD Specific: Sets audio DMA
 141  */
 142
 143 static int _cx25821_start_audio_dma(struct cx25821_audio_dev *chip)
 144 {
 145         struct cx25821_audio_buffer *buf = chip->buf;
 146         struct cx25821_dev *dev = chip->dev;
 147         struct sram_channel *audio_ch =
 148             &cx25821_sram_channels[AUDIO_SRAM_CHANNEL];
 149         u32 tmp = 0;
 150
 151         /* enable output on the GPIO 0 for the MCLK ADC (Audio) */
 152         cx25821_set_gpiopin_direction(chip->dev, 0, 0);
 153
 154         /* Make sure RISC/FIFO are off before changing FIFO/RISC settings */
 155         cx_clear(AUD_INT_DMA_CTL,
 156                  FLD_AUD_DST_A_RISC_EN | FLD_AUD_DST_A_FIFO_EN);
 157
 158         /* setup fifo + format - out channel */
 159         cx25821_sram_channel_setup_audio(chip->dev, audio_ch, buf->bpl,
 160                                          buf->risc.dma);
 161
 162         /* sets bpl size */
 163         cx_write(AUD_A_LNGTH, buf->bpl);
 164
 165         /* reset counter */
 166         /* GP_COUNT_CONTROL_RESET = 0x3 */
 167         cx_write(AUD_A_GPCNT_CTL, GP_COUNT_CONTROL_RESET);
 168         atomic_set(&chip->count, 0);
 169
 170         /* Set the input mode to 16-bit */
 171         tmp = cx_read(AUD_A_CFG);
 172         cx_write(AUD_A_CFG,
 173                  tmp | FLD_AUD_DST_PK_MODE | FLD_AUD_DST_ENABLE |
 174                  FLD_AUD_CLK_ENABLE);
 175
 176         /* printk(KERN_INFO "DEBUG: Start audio DMA, %d B/line,"
 177                                 "cmds_start(0x%x)= %d lines/FIFO, %d periods, "
 178                                 "%d byte buffer\n", buf->bpl,
 179                                 audio_ch->cmds_start,
 180                                 cx_read(audio_ch->cmds_start + 12)>>1,
 181                                 chip->num_periods, buf->bpl *chip->num_periods);
 182         */
 183
 184         /* Enables corresponding bits at AUD_INT_STAT */
 185         cx_write(AUD_A_INT_MSK,
 186                  FLD_AUD_DST_RISCI1 | FLD_AUD_DST_OF | FLD_AUD_DST_SYNC |
 187                  FLD_AUD_DST_OPC_ERR);
 188
 189         /* Clean any pending interrupt bits already set */
 190         cx_write(AUD_A_INT_STAT, ~0);
 191
 192         /* enable audio irqs */
 193         cx_set(PCI_INT_MSK, chip->dev->pci_irqmask | PCI_MSK_AUD_INT);
 194
 195         /* Turn on audio downstream fifo and risc enable 0x101 */
 196         tmp = cx_read(AUD_INT_DMA_CTL);
 197         cx_set(AUD_INT_DMA_CTL,
 198                tmp | (FLD_AUD_DST_A_RISC_EN | FLD_AUD_DST_A_FIFO_EN));
 199
 200         mdelay(100);
 201         return 0;
 202 }
 203
 204 /*
 205  * BOARD Specific: Resets audio DMA
 206  */
 207 static int _cx25821_stop_audio_dma(struct cx25821_audio_dev *chip)
 208 {
 209         struct cx25821_dev *dev = chip->dev;
 210
 211         /* stop dma */
 212         cx_clear(AUD_INT_DMA_CTL,
 213                  FLD_AUD_DST_A_RISC_EN | FLD_AUD_DST_A_FIFO_EN);
 214
 215         /* disable irqs */
 216         cx_clear(PCI_INT_MSK, PCI_MSK_AUD_INT);
 217         cx_clear(AUD_A_INT_MSK,
 218                  AUD_INT_OPC_ERR | AUD_INT_DN_SYNC | AUD_INT_DN_RISCI2 |
 219                  AUD_INT_DN_RISCI1);
 220
 221         return 0;
 222 }
 223
 224 #define MAX_IRQ_LOOP 50
 225
 226 /*
 227  * BOARD Specific: IRQ dma bits
 228  */
 229 static char *cx25821_aud_irqs[32] = {
 230         "dn_risci1", "up_risci1", "rds_dn_risc1",       /* 0-2 */
 231         NULL,                   /* reserved */
 232         "dn_risci2", "up_risci2", "rds_dn_risc2",       /* 4-6 */
 233         NULL,                   /* reserved */
 234         "dnf_of", "upf_uf", "rds_dnf_uf",       /* 8-10 */
 235         NULL,                   /* reserved */
 236         "dn_sync", "up_sync", "rds_dn_sync",    /* 12-14 */
 237         NULL,                   /* reserved */
 238         "opc_err", "par_err", "rip_err",        /* 16-18 */
 239         "pci_abort", "ber_irq", "mchg_irq"      /* 19-21 */
 240 };
 241
 242 /*
 243  * BOARD Specific: Threats IRQ audio specific calls
 244  */
 245 static void cx25821_aud_irq(struct cx25821_audio_dev *chip, u32 status,
 246                             u32 mask)
 247 {
 248         struct cx25821_dev *dev = chip->dev;
 249
 250         if (0 == (status & mask))
 251                 return;
 252
 253         cx_write(AUD_A_INT_STAT, status);
 254         if (debug > 1 || (status & mask & ~0xff))
 255                 cx25821_print_irqbits(dev->name, "irq aud",
 256                                       cx25821_aud_irqs,
 257                                       ARRAY_SIZE(cx25821_aud_irqs), status,
 258                                       mask);
 259
 260         /* risc op code error */
 261         if (status & AUD_INT_OPC_ERR) {
 262                 printk(KERN_WARNING "WARNING %s/1: Audio risc op code error\n",
 263                        dev->name);
 264
 265                 cx_clear(AUD_INT_DMA_CTL,
 266                          FLD_AUD_DST_A_RISC_EN | FLD_AUD_DST_A_FIFO_EN);
 267                 cx25821_sram_channel_dump_audio(dev,
 268                                                 &cx25821_sram_channels
 269                                                 [AUDIO_SRAM_CHANNEL]);
 270         }
 271         if (status & AUD_INT_DN_SYNC) {
 272                 printk(KERN_WARNING "WARNING %s: Downstream sync error!\n",
 273                        dev->name);
 274                 cx_write(AUD_A_GPCNT_CTL, GP_COUNT_CONTROL_RESET);
 275                 return;
 276         }
 277
 278         /* risc1 downstream */
 279         if (status & AUD_INT_DN_RISCI1) {
 280                 atomic_set(&chip->count, cx_read(AUD_A_GPCNT));
 281                 snd_pcm_period_elapsed(chip->substream);
 282         }
 283 }
 284
 285 /*
 286  * BOARD Specific: Handles IRQ calls
 287  */
 288 static irqreturn_t cx25821_irq(int irq, void *dev_id)
 289 {
 290         struct cx25821_audio_dev *chip = dev_id;
 291         struct cx25821_dev *dev = chip->dev;
 292         u32 status, pci_status;
 293         u32 audint_status, audint_mask;
 294         int loop, handled = 0;
 295         int audint_count = 0;
 296
 297         audint_status = cx_read(AUD_A_INT_STAT);
 298         audint_mask = cx_read(AUD_A_INT_MSK);
 299         audint_count = cx_read(AUD_A_GPCNT);
 300         status = cx_read(PCI_INT_STAT);
 301
 302         for (loop = 0; loop < 1; loop++) {
 303                 status = cx_read(PCI_INT_STAT);
 304                 if (0 == status) {
 305                         status = cx_read(PCI_INT_STAT);
 306                         audint_status = cx_read(AUD_A_INT_STAT);
 307                         audint_mask = cx_read(AUD_A_INT_MSK);
 308
 309                         if (status) {
 310                                 handled = 1;
 311                                 cx_write(PCI_INT_STAT, status);
 312
 313                                 cx25821_aud_irq(chip, audint_status,
 314                                                 audint_mask);
 315                                 break;
 316                         } else
 317                                 goto out;
 318                 }
 319
 320                 handled = 1;
 321                 cx_write(PCI_INT_STAT, status);
 322
 323                 cx25821_aud_irq(chip, audint_status, audint_mask);
 324         }
 325
 326         pci_status = cx_read(PCI_INT_STAT);
 327
 328         if (handled)
 329                 cx_write(PCI_INT_STAT, pci_status);
 330
 331 out:
 332         return IRQ_RETVAL(handled);
 333 }
 334
 335 static int dsp_buffer_free(struct cx25821_audio_dev *chip)
 336 {
 337         BUG_ON(!chip->dma_size);
 338
 339         dprintk(2, "Freeing buffer\n");
 340         videobuf_dma_unmap(&chip->pci->dev, chip->dma_risc);
 341         videobuf_dma_free(chip->dma_risc);
 342         btcx_riscmem_free(chip->pci, &chip->buf->risc);
 343         kfree(chip->buf);
 344
 345         chip->dma_risc = NULL;
 346         chip->dma_size = 0;
 347
 348         return 0;
 349 }
 350
 351 /****************************************************************************
 352                                 ALSA PCM Interface
 353  ****************************************************************************/
 354
 355 /*
 356  * Digital hardware definition
 357  */
 358 #define DEFAULT_FIFO_SIZE       384
 359 static struct snd_pcm_hardware snd_cx25821_digital_hw = {
 360         .info = SNDRV_PCM_INFO_MMAP |
 361             SNDRV_PCM_INFO_INTERLEAVED |
 362             SNDRV_PCM_INFO_BLOCK_TRANSFER | SNDRV_PCM_INFO_MMAP_VALID,
 363         .formats = SNDRV_PCM_FMTBIT_S16_LE,
 364
 365         .rates = SNDRV_PCM_RATE_48000,
 366         .rate_min = 48000,
 367         .rate_max = 48000,
 368         .channels_min = 2,
 369         .channels_max = 2,
 370         /* Analog audio output will be full of clicks and pops if there
 371            are not exactly four lines in the SRAM FIFO buffer.  */
 372         .period_bytes_min = DEFAULT_FIFO_SIZE / 3,
 373         .period_bytes_max = DEFAULT_FIFO_SIZE / 3,
 374         .periods_min = 1,
 375         .periods_max = AUDIO_LINE_SIZE,
 376         /* 128 * 128 = 16384 = 1024 * 16 */
 377         .buffer_bytes_max = (AUDIO_LINE_SIZE * AUDIO_LINE_SIZE),
 378 };
 379
 380 /*
 381  * audio pcm capture open callback
 382  */
 383 static int snd_cx25821_pcm_open(struct snd_pcm_substream *substream)
 384 {
 385         struct cx25821_audio_dev *chip = snd_pcm_substream_chip(substream);
 386         struct snd_pcm_runtime *runtime = substream->runtime;
 387         int err;
 388         unsigned int bpl = 0;
 389
 390         if (!chip) {
 391                 printk(KERN_ERR "DEBUG: cx25821 can't find device struct."
 392                        " Can't proceed with open\n");
 393                 return -ENODEV;
 394         }
 395
 396         err =
 397             snd_pcm_hw_constraint_pow2(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS);
 398         if (err < 0)
 399                 goto _error;
 400
 401         chip->substream = substream;
 402
 403         runtime->hw = snd_cx25821_digital_hw;
 404
 405         if (cx25821_sram_channels[AUDIO_SRAM_CHANNEL].fifo_size !=
 406             DEFAULT_FIFO_SIZE) {
 407                 /* since there are 3 audio Clusters */
 408                 bpl = cx25821_sram_channels[AUDIO_SRAM_CHANNEL].fifo_size / 3;
 409                 bpl &= ~7;      /* must be multiple of 8 */
 410
 411                 if (bpl > AUDIO_LINE_SIZE)
 412                         bpl = AUDIO_LINE_SIZE;
 413
 414                 runtime->hw.period_bytes_min = bpl;
 415                 runtime->hw.period_bytes_max = bpl;
 416         }
 417
 418         return 0;
 419 _error:
 420         dprintk(1, "Error opening PCM!\n");
 421         return err;
 422 }
 423
 424 /*
 425  * audio close callback
 426  */
 427 static int snd_cx25821_close(struct snd_pcm_substream *substream)
 428 {
 429         return 0;
 430 }
 431
 432 /*
 433  * hw_params callback
 434  */
 435 static int snd_cx25821_hw_params(struct snd_pcm_substream *substream,
 436                                  struct snd_pcm_hw_params *hw_params)
 437 {
 438         struct cx25821_audio_dev *chip = snd_pcm_substream_chip(substream);
 439         struct videobuf_dmabuf *dma;
 440
 441         struct cx25821_audio_buffer *buf;
 442         int ret;
 443
 444         if (substream->runtime->dma_area) {
 445                 dsp_buffer_free(chip);
 446                 substream->runtime->dma_area = NULL;
 447         }
 448
 449         chip->period_size = params_period_bytes(hw_params);
 450         chip->num_periods = params_periods(hw_params);
 451         chip->dma_size = chip->period_size * params_periods(hw_params);
 452
 453         BUG_ON(!chip->dma_size);
 454         BUG_ON(chip->num_periods & (chip->num_periods - 1));
 455
 456         buf = kzalloc(sizeof(*buf), GFP_KERNEL);
 457         if (NULL == buf)
 458                 return -ENOMEM;
 459
 460         if (chip->period_size > AUDIO_LINE_SIZE)
 461                 chip->period_size = AUDIO_LINE_SIZE;
 462
 463         buf->bpl = chip->period_size;
 464
 465         dma = &buf->dma;
 466         videobuf_dma_init(dma);
 467         ret = videobuf_dma_init_kernel(dma, PCI_DMA_FROMDEVICE,
 468                                        (PAGE_ALIGN(chip->dma_size) >>
 469                                         PAGE_SHIFT));
 470         if (ret < 0)
 471                 goto error;
 472
 473         ret = videobuf_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                                           chip->period_size, chip->num_periods,
 480                                           1);
 481         if (ret < 0) {
 482                 printk(KERN_INFO
 483                         "DEBUG: ERROR after cx25821_risc_databuffer_audio()\n");
 484                 goto error;
 485         }
 486
 487         /* Loop back to start of program */
 488         buf->risc.jmp[0] = cpu_to_le32(RISC_JUMP | RISC_IRQ1 | RISC_CNT_INC);
 489         buf->risc.jmp[1] = cpu_to_le32(buf->risc.dma);
 490         buf->risc.jmp[2] = cpu_to_le32(0);      /* bits 63-32 */
 491
 492         chip->buf = buf;
 493         chip->dma_risc = dma;
 494
 495         substream->runtime->dma_area = chip->dma_risc->vaddr;
 496         substream->runtime->dma_bytes = chip->dma_size;
 497         substream->runtime->dma_addr = 0;
 498
 499         return 0;
 500
 501 error:
 502         kfree(buf);
 503         return ret;
 504 }
 505
 506 /*
 507  * hw free callback
 508  */
 509 static int snd_cx25821_hw_free(struct snd_pcm_substream *substream)
 510 {
 511         struct cx25821_audio_dev *chip = snd_pcm_substream_chip(substream);
 512
 513         if (substream->runtime->dma_area) {
 514                 dsp_buffer_free(chip);
 515                 substream->runtime->dma_area = NULL;
 516         }
 517
 518         return 0;
 519 }
 520
 521 /*
 522  * prepare callback
 523  */
 524 static int snd_cx25821_prepare(struct snd_pcm_substream *substream)
 525 {
 526         return 0;
 527 }
 528
 529 /*
 530  * trigger callback
 531  */
 532 static int snd_cx25821_card_trigger(struct snd_pcm_substream *substream,
 533                                     int cmd)
 534 {
 535         struct cx25821_audio_dev *chip = snd_pcm_substream_chip(substream);
 536         int err = 0;
 537
 538         /* Local interrupts are already disabled by ALSA */
 539         spin_lock(&chip->reg_lock);
 540
 541         switch (cmd) {
 542         case SNDRV_PCM_TRIGGER_START:
 543                 err = _cx25821_start_audio_dma(chip);
 544                 break;
 545         case SNDRV_PCM_TRIGGER_STOP:
 546                 err = _cx25821_stop_audio_dma(chip);
 547                 break;
 548         default:
 549                 err = -EINVAL;
 550                 break;
 551         }
 552
 553         spin_unlock(&chip->reg_lock);
 554
 555         return err;
 556 }
 557
 558 /*
 559  * pointer callback
 560  */
 561 static snd_pcm_uframes_t snd_cx25821_pointer(struct snd_pcm_substream
 562                                              *substream)
 563 {
 564         struct cx25821_audio_dev *chip = snd_pcm_substream_chip(substream);
 565         struct snd_pcm_runtime *runtime = substream->runtime;
 566         u16 count;
 567
 568         count = atomic_read(&chip->count);
 569
 570         return runtime->period_size * (count & (runtime->periods - 1));
 571 }
 572
 573 /*
 574  * page callback (needed for mmap)
 575  */
 576 static struct page *snd_cx25821_page(struct snd_pcm_substream *substream,
 577                                      unsigned long offset)
 578 {
 579         void *pageptr = substream->runtime->dma_area + offset;
 580
 581         return vmalloc_to_page(pageptr);
 582 }
 583
 584 /*
 585  * operators
 586  */
 587 static struct snd_pcm_ops snd_cx25821_pcm_ops = {
 588         .open = snd_cx25821_pcm_open,
 589         .close = snd_cx25821_close,
 590         .ioctl = snd_pcm_lib_ioctl,
 591         .hw_params = snd_cx25821_hw_params,
 592         .hw_free = snd_cx25821_hw_free,
 593         .prepare = snd_cx25821_prepare,
 594         .trigger = snd_cx25821_card_trigger,
 595         .pointer = snd_cx25821_pointer,
 596         .page = snd_cx25821_page,
 597 };
 598
 599 /*
 600  * ALSA create a PCM device:  Called when initializing the board.
 601  * Sets up the name and hooks up the callbacks
 602  */
 603 static int snd_cx25821_pcm(struct cx25821_audio_dev *chip, int device,
 604                            char *name)
 605 {
 606         struct snd_pcm *pcm;
 607         int err;
 608
 609         err = snd_pcm_new(chip->card, name, device, 0, 1, &pcm);
 610         if (err < 0) {
 611                 printk(KERN_INFO "ERROR: FAILED snd_pcm_new() in %s\n",
 612                        __func__);
 613                 return err;
 614         }
 615         pcm->private_data = chip;
 616         pcm->info_flags = 0;
 617         strcpy(pcm->name, name);
 618         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_cx25821_pcm_ops);
 619
 620         return 0;
 621 }
 622
 623 /****************************************************************************
 624                         Basic Flow for Sound Devices
 625  ****************************************************************************/
 626
 627 /*
 628  * PCI ID Table - 14f1:8801 and 14f1:8811 means function 1: Audio
 629  * Only boards with eeprom and byte 1 at eeprom=1 have it
 630  */
 631
 632 static struct pci_device_id cx25821_audio_pci_tbl[] __devinitdata = {
 633         {0x14f1, 0x0920, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
 634         {0,}
 635 };
 636
 637 MODULE_DEVICE_TABLE(pci, cx25821_audio_pci_tbl);
 638
 639 /*
 640  * Not used in the function snd_cx25821_dev_free so removing
 641  * from the file.
 642  */
 643 /*
 644 static int snd_cx25821_free(struct cx25821_audio_dev *chip)
 645 {
 646         if (chip->irq >= 0)
 647                 free_irq(chip->irq, chip);
 648
 649         cx25821_dev_unregister(chip->dev);
 650         pci_disable_device(chip->pci);
 651
 652         return 0;
 653 }
 654 */
 655
 656 /*
 657  * Component Destructor
 658  */
 659 static void snd_cx25821_dev_free(struct snd_card *card)
 660 {
 661         struct cx25821_audio_dev *chip = card->private_data;
 662
 663         /* snd_cx25821_free(chip); */
 664         snd_card_free(chip->card);
 665 }
 666
 667 /*
 668  * Alsa Constructor - Component probe
 669  */
 670 static int cx25821_audio_initdev(struct cx25821_dev *dev)
 671 {
 672         struct snd_card *card;
 673         struct cx25821_audio_dev *chip;
 674         int err;
 675
 676         if (devno >= SNDRV_CARDS) {
 677                 printk(KERN_INFO "DEBUG ERROR: devno >= SNDRV_CARDS %s\n",
 678                        __func__);
 679                 return -ENODEV;
 680         }
 681
 682         if (!enable[devno]) {
 683                 ++devno;
 684                 printk(KERN_INFO "DEBUG ERROR: !enable[devno] %s\n", __func__);
 685                 return -ENOENT;
 686         }
 687
 688         err = snd_card_create(index[devno], id[devno], THIS_MODULE,
 689                          sizeof(struct cx25821_audio_dev), &card);
 690         if (err < 0) {
 691                 printk(KERN_INFO
 692                        "DEBUG ERROR: cannot create snd_card_new in %s\n",
 693                        __func__);
 694                 return err;
 695         }
 696
 697         strcpy(card->driver, "cx25821");
 698
 699         /* Card "creation" */
 700         card->private_free = snd_cx25821_dev_free;
 701         chip = card->private_data;
 702         spin_lock_init(&chip->reg_lock);
 703
 704         chip->dev = dev;
 705         chip->card = card;
 706         chip->pci = dev->pci;
 707         chip->iobase = pci_resource_start(dev->pci, 0);
 708
 709         chip->irq = dev->pci->irq;
 710
 711         err = request_irq(dev->pci->irq, cx25821_irq,
 712                           IRQF_SHARED | IRQF_DISABLED, chip->dev->name, chip);
 713
 714         if (err < 0) {
 715                 printk(KERN_ERR "ERROR %s: can't get IRQ %d for ALSA\n",
 716                        chip->dev->name, dev->pci->irq);
 717                 goto error;
 718         }
 719
 720         err = snd_cx25821_pcm(chip, 0, "cx25821 Digital");
 721         if (err < 0) {
 722                 printk(KERN_INFO
 723                        "DEBUG ERROR: cannot create snd_cx25821_pcm %s\n",
 724                        __func__);
 725                 goto error;
 726         }
 727
 728         snd_card_set_dev(card, &chip->pci->dev);
 729
 730         strcpy(card->shortname, "cx25821");
 731         sprintf(card->longname, "%s at 0x%lx irq %d", chip->dev->name,
 732                 chip->iobase, chip->irq);
 733         strcpy(card->mixername, "CX25821");
 734
 735         printk(KERN_INFO "%s/%i: ALSA support for cx25821 boards\n",
 736                card->driver, devno);
 737
 738         err = snd_card_register(card);
 739         if (err < 0) {
 740                 printk(KERN_INFO "DEBUG ERROR: cannot register sound card %s\n",
 741                        __func__);
 742                 goto error;
 743         }
 744
 745         snd_cx25821_cards[devno] = card;
 746
 747         devno++;
 748         return 0;
 749
 750 error:
 751         snd_card_free(card);
 752         return err;
 753 }
 754
 755 /****************************************************************************
 756                                 LINUX MODULE INIT
 757  ****************************************************************************/
 758 static void cx25821_audio_fini(void)
 759 {
 760         snd_card_free(snd_cx25821_cards[0]);
 761 }
 762
 763 /*
 764  * Module initializer
 765  *
 766  * Loops through present saa7134 cards, and assigns an ALSA device
 767  * to each one
 768  *
 769  */
 770 static int cx25821_alsa_init(void)
 771 {
 772         struct cx25821_dev *dev = NULL;
 773         struct list_head *list;
 774
 775         list_for_each(list, &cx25821_devlist) {
 776                 dev = list_entry(list, struct cx25821_dev, devlist);
 777                 cx25821_audio_initdev(dev);
 778         }
 779
 780         if (dev == NULL)
 781                 printk(KERN_INFO
 782                        "cx25821 ERROR ALSA: no cx25821 cards found\n");
 783
 784         return 0;
 785
 786 }
 787
 788 late_initcall(cx25821_alsa_init);
 789 module_exit(cx25821_audio_fini);
 790
 791 /* ----------------------------------------------------------- */
 792 /*
 793  * Local variables:
 794  * c-basic-offset: 8
 795  * End:
 796  */