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 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  24
  25 #include <linux/module.h>
  26 #include <linux/init.h>
  27 #include <linux/device.h>
  28 #include <linux/interrupt.h>
  29 #include <linux/vmalloc.h>
  30 #include <linux/dma-mapping.h>
  31 #include <linux/pci.h>
  32 #include <linux/slab.h>
  33
  34 #include <linux/delay.h>
  35 #include <sound/core.h>
  36 #include <sound/pcm.h>
  37 #include <sound/pcm_params.h>
  38 #include <sound/control.h>
  39 #include <sound/initval.h>
  40 #include <sound/tlv.h>
  41
  42 #include "cx25821.h"
  43 #include "cx25821-reg.h"
  44
  45 #define AUDIO_SRAM_CHANNEL      SRAM_CH08
  46
  47 #define dprintk(level, fmt, arg...)                             \
  48 do {                                                            \
  49         if (debug >= level)                                     \
  50                 pr_info("%s/1: " fmt, chip->dev->name, ##arg);  \
  51 } while (0)
  52 #define dprintk_core(level, fmt, arg...)                                \
  53 do {                                                                    \
  54         if (debug >= level)                                             \
  55                 printk(KERN_DEBUG "%s/1: " fmt, chip->dev->name, ##arg); \
  56 } while (0)
  57
  58 /****************************************************************************
  59         Data type declarations - Can be moded to a header file later
  60  ****************************************************************************/
  61
  62 static struct snd_card *snd_cx25821_cards[SNDRV_CARDS];
  63 static int devno;
  64
  65 struct cx25821_audio_buffer {
  66         unsigned int bpl;
  67         struct btcx_riscmem risc;
  68         struct videobuf_dmabuf dma;
  69 };
  70
  71 struct cx25821_audio_dev {
  72         struct cx25821_dev *dev;
  73         struct cx25821_dmaqueue q;
  74
  75         /* pci i/o */
  76         struct pci_dev *pci;
  77
  78         /* audio controls */
  79         int irq;
  80
  81         struct snd_card *card;
  82
  83         unsigned long iobase;
  84         spinlock_t reg_lock;
  85         atomic_t count;
  86
  87         unsigned int dma_size;
  88         unsigned int period_size;
  89         unsigned int num_periods;
  90
  91         struct videobuf_dmabuf *dma_risc;
  92
  93         struct cx25821_audio_buffer *buf;
  94
  95         struct snd_pcm_substream *substream;
  96 };
  97
  98
  99 /****************************************************************************
 100                         Module global static vars
 101  ****************************************************************************/
 102
 103 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;      /* Index 0-MAX */
 104 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;       /* ID for this card */
 105 static int enable[SNDRV_CARDS] = { 1, [1 ... (SNDRV_CARDS - 1)] = 1 };
 106
 107 module_param_array(enable, bool, NULL, 0444);
 108 MODULE_PARM_DESC(enable, "Enable cx25821 soundcard. default enabled.");
 109
 110 module_param_array(index, int, NULL, 0444);
 111 MODULE_PARM_DESC(index, "Index value for cx25821 capture interface(s).");
 112
 113 /****************************************************************************
 114                                 Module macros
 115  ****************************************************************************/
 116
 117 MODULE_DESCRIPTION("ALSA driver module for cx25821 based capture cards");
 118 MODULE_AUTHOR("Hiep Huynh");
 119 MODULE_LICENSE("GPL");
 120 MODULE_SUPPORTED_DEVICE("{{Conexant,25821}");   /* "{{Conexant,23881}," */
 121
 122 static unsigned int debug;
 123 module_param(debug, int, 0644);
 124 MODULE_PARM_DESC(debug, "enable debug messages");
 125
 126 /****************************************************************************
 127                         Module specific funtions
 128  ****************************************************************************/
 129 /* Constants taken from cx88-reg.h */
 130 #define AUD_INT_DN_RISCI1       (1 <<  0)
 131 #define AUD_INT_UP_RISCI1       (1 <<  1)
 132 #define AUD_INT_RDS_DN_RISCI1   (1 <<  2)
 133 #define AUD_INT_DN_RISCI2       (1 <<  4)       /* yes, 3 is skipped */
 134 #define AUD_INT_UP_RISCI2       (1 <<  5)
 135 #define AUD_INT_RDS_DN_RISCI2   (1 <<  6)
 136 #define AUD_INT_DN_SYNC         (1 << 12)
 137 #define AUD_INT_UP_SYNC         (1 << 13)
 138 #define AUD_INT_RDS_DN_SYNC     (1 << 14)
 139 #define AUD_INT_OPC_ERR         (1 << 16)
 140 #define AUD_INT_BER_IRQ         (1 << 20)
 141 #define AUD_INT_MCHG_IRQ        (1 << 21)
 142 #define GP_COUNT_CONTROL_RESET  0x3
 143
 144 #define PCI_MSK_AUD_EXT   (1 <<  4)
 145 #define PCI_MSK_AUD_INT   (1 <<  3)
 146 /*
 147  * BOARD Specific: Sets audio DMA
 148  */
 149
 150 static int _cx25821_start_audio_dma(struct cx25821_audio_dev *chip)
 151 {
 152         struct cx25821_audio_buffer *buf = chip->buf;
 153         struct cx25821_dev *dev = chip->dev;
 154         struct sram_channel *audio_ch =
 155             &cx25821_sram_channels[AUDIO_SRAM_CHANNEL];
 156         u32 tmp = 0;
 157
 158         /* enable output on the GPIO 0 for the MCLK ADC (Audio) */
 159         cx25821_set_gpiopin_direction(chip->dev, 0, 0);
 160
 161         /* Make sure RISC/FIFO are off before changing FIFO/RISC settings */
 162         cx_clear(AUD_INT_DMA_CTL,
 163                  FLD_AUD_DST_A_RISC_EN | FLD_AUD_DST_A_FIFO_EN);
 164
 165         /* setup fifo + format - out channel */
 166         cx25821_sram_channel_setup_audio(chip->dev, audio_ch, buf->bpl,
 167                                          buf->risc.dma);
 168
 169         /* sets bpl size */
 170         cx_write(AUD_A_LNGTH, buf->bpl);
 171
 172         /* reset counter */
 173         /* GP_COUNT_CONTROL_RESET = 0x3 */
 174         cx_write(AUD_A_GPCNT_CTL, GP_COUNT_CONTROL_RESET);
 175         atomic_set(&chip->count, 0);
 176
 177         /* Set the input mode to 16-bit */
 178         tmp = cx_read(AUD_A_CFG);
 179         cx_write(AUD_A_CFG,
 180                  tmp | FLD_AUD_DST_PK_MODE | FLD_AUD_DST_ENABLE |
 181                  FLD_AUD_CLK_ENABLE);
 182
 183         /*
 184         pr_info("DEBUG: Start audio DMA, %d B/line, cmds_start(0x%x)= %d lines/FIFO, %d periods, %d byte buffer\n",
 185                 buf->bpl, audio_ch->cmds_start,
 186                 cx_read(audio_ch->cmds_start + 12)>>1,
 187                 chip->num_periods, buf->bpl * chip->num_periods);
 188         */
 189
 190         /* Enables corresponding bits at AUD_INT_STAT */
 191         cx_write(AUD_A_INT_MSK,
 192                  FLD_AUD_DST_RISCI1 | FLD_AUD_DST_OF | FLD_AUD_DST_SYNC |
 193                  FLD_AUD_DST_OPC_ERR);
 194
 195         /* Clean any pending interrupt bits already set */
 196         cx_write(AUD_A_INT_STAT, ~0);
 197
 198         /* enable audio irqs */
 199         cx_set(PCI_INT_MSK, chip->dev->pci_irqmask | PCI_MSK_AUD_INT);
 200
 201         /* Turn on audio downstream fifo and risc enable 0x101 */
 202         tmp = cx_read(AUD_INT_DMA_CTL);
 203         cx_set(AUD_INT_DMA_CTL,
 204                tmp | (FLD_AUD_DST_A_RISC_EN | FLD_AUD_DST_A_FIFO_EN));
 205
 206         mdelay(100);
 207         return 0;
 208 }
 209
 210 /*
 211  * BOARD Specific: Resets audio DMA
 212  */
 213 static int _cx25821_stop_audio_dma(struct cx25821_audio_dev *chip)
 214 {
 215         struct cx25821_dev *dev = chip->dev;
 216
 217         /* stop dma */
 218         cx_clear(AUD_INT_DMA_CTL,
 219                  FLD_AUD_DST_A_RISC_EN | FLD_AUD_DST_A_FIFO_EN);
 220
 221         /* disable irqs */
 222         cx_clear(PCI_INT_MSK, PCI_MSK_AUD_INT);
 223         cx_clear(AUD_A_INT_MSK,
 224                  AUD_INT_OPC_ERR | AUD_INT_DN_SYNC | AUD_INT_DN_RISCI2 |
 225                  AUD_INT_DN_RISCI1);
 226
 227         return 0;
 228 }
 229
 230 #define MAX_IRQ_LOOP 50
 231
 232 /*
 233  * BOARD Specific: IRQ dma bits
 234  */
 235 static char *cx25821_aud_irqs[32] = {
 236         "dn_risci1", "up_risci1", "rds_dn_risc1",       /* 0-2 */
 237         NULL,                   /* reserved */
 238         "dn_risci2", "up_risci2", "rds_dn_risc2",       /* 4-6 */
 239         NULL,                   /* reserved */
 240         "dnf_of", "upf_uf", "rds_dnf_uf",       /* 8-10 */
 241         NULL,                   /* reserved */
 242         "dn_sync", "up_sync", "rds_dn_sync",    /* 12-14 */
 243         NULL,                   /* reserved */
 244         "opc_err", "par_err", "rip_err",        /* 16-18 */
 245         "pci_abort", "ber_irq", "mchg_irq"      /* 19-21 */
 246 };
 247
 248 /*
 249  * BOARD Specific: Threats IRQ audio specific calls
 250  */
 251 static void cx25821_aud_irq(struct cx25821_audio_dev *chip, u32 status,
 252                             u32 mask)
 253 {
 254         struct cx25821_dev *dev = chip->dev;
 255
 256         if (0 == (status & mask))
 257                 return;
 258
 259         cx_write(AUD_A_INT_STAT, status);
 260         if (debug > 1 || (status & mask & ~0xff))
 261                 cx25821_print_irqbits(dev->name, "irq aud",
 262                                       cx25821_aud_irqs,
 263                                       ARRAY_SIZE(cx25821_aud_irqs), status,
 264                                       mask);
 265
 266         /* risc op code error */
 267         if (status & AUD_INT_OPC_ERR) {
 268                 pr_warn("WARNING %s/1: Audio risc op code error\n", dev->name);
 269
 270                 cx_clear(AUD_INT_DMA_CTL,
 271                          FLD_AUD_DST_A_RISC_EN | FLD_AUD_DST_A_FIFO_EN);
 272                 cx25821_sram_channel_dump_audio(dev,
 273                                                 &cx25821_sram_channels
 274                                                 [AUDIO_SRAM_CHANNEL]);
 275         }
 276         if (status & AUD_INT_DN_SYNC) {
 277                 pr_warn("WARNING %s: Downstream sync error!\n", dev->name);
 278                 cx_write(AUD_A_GPCNT_CTL, GP_COUNT_CONTROL_RESET);
 279                 return;
 280         }
 281
 282         /* risc1 downstream */
 283         if (status & AUD_INT_DN_RISCI1) {
 284                 atomic_set(&chip->count, cx_read(AUD_A_GPCNT));
 285                 snd_pcm_period_elapsed(chip->substream);
 286         }
 287 }
 288
 289 /*
 290  * BOARD Specific: Handles IRQ calls
 291  */
 292 static irqreturn_t cx25821_irq(int irq, void *dev_id)
 293 {
 294         struct cx25821_audio_dev *chip = dev_id;
 295         struct cx25821_dev *dev = chip->dev;
 296         u32 status, pci_status;
 297         u32 audint_status, audint_mask;
 298         int loop, handled = 0;
 299         int audint_count = 0;
 300
 301         audint_status = cx_read(AUD_A_INT_STAT);
 302         audint_mask = cx_read(AUD_A_INT_MSK);
 303         audint_count = cx_read(AUD_A_GPCNT);
 304         status = cx_read(PCI_INT_STAT);
 305
 306         for (loop = 0; loop < 1; loop++) {
 307                 status = cx_read(PCI_INT_STAT);
 308                 if (0 == status) {
 309                         status = cx_read(PCI_INT_STAT);
 310                         audint_status = cx_read(AUD_A_INT_STAT);
 311                         audint_mask = cx_read(AUD_A_INT_MSK);
 312
 313                         if (status) {
 314                                 handled = 1;
 315                                 cx_write(PCI_INT_STAT, status);
 316
 317                                 cx25821_aud_irq(chip, audint_status,
 318                                                 audint_mask);
 319                                 break;
 320                         } else
 321                                 goto out;
 322                 }
 323
 324                 handled = 1;
 325                 cx_write(PCI_INT_STAT, status);
 326
 327                 cx25821_aud_irq(chip, audint_status, audint_mask);
 328         }
 329
 330         pci_status = cx_read(PCI_INT_STAT);
 331
 332         if (handled)
 333                 cx_write(PCI_INT_STAT, pci_status);
 334
 335 out:
 336         return IRQ_RETVAL(handled);
 337 }
 338
 339 static int dsp_buffer_free(struct cx25821_audio_dev *chip)
 340 {
 341         BUG_ON(!chip->dma_size);
 342
 343         dprintk(2, "Freeing buffer\n");
 344         videobuf_dma_unmap(&chip->pci->dev, chip->dma_risc);
 345         videobuf_dma_free(chip->dma_risc);
 346         btcx_riscmem_free(chip->pci, &chip->buf->risc);
 347         kfree(chip->buf);
 348
 349         chip->dma_risc = NULL;
 350         chip->dma_size = 0;
 351
 352         return 0;
 353 }
 354
 355 /****************************************************************************
 356                                 ALSA PCM Interface
 357  ****************************************************************************/
 358
 359 /*
 360  * Digital hardware definition
 361  */
 362 #define DEFAULT_FIFO_SIZE       384
 363 static struct snd_pcm_hardware snd_cx25821_digital_hw = {
 364         .info = SNDRV_PCM_INFO_MMAP |
 365             SNDRV_PCM_INFO_INTERLEAVED |
 366             SNDRV_PCM_INFO_BLOCK_TRANSFER | SNDRV_PCM_INFO_MMAP_VALID,
 367         .formats = SNDRV_PCM_FMTBIT_S16_LE,
 368
 369         .rates = SNDRV_PCM_RATE_48000,
 370         .rate_min = 48000,
 371         .rate_max = 48000,
 372         .channels_min = 2,
 373         .channels_max = 2,
 374         /* Analog audio output will be full of clicks and pops if there
 375            are not exactly four lines in the SRAM FIFO buffer.  */
 376         .period_bytes_min = DEFAULT_FIFO_SIZE / 3,
 377         .period_bytes_max = DEFAULT_FIFO_SIZE / 3,
 378         .periods_min = 1,
 379         .periods_max = AUDIO_LINE_SIZE,
 380         /* 128 * 128 = 16384 = 1024 * 16 */
 381         .buffer_bytes_max = (AUDIO_LINE_SIZE * AUDIO_LINE_SIZE),
 382 };
 383
 384 /*
 385  * audio pcm capture open callback
 386  */
 387 static int snd_cx25821_pcm_open(struct snd_pcm_substream *substream)
 388 {
 389         struct cx25821_audio_dev *chip = snd_pcm_substream_chip(substream);
 390         struct snd_pcm_runtime *runtime = substream->runtime;
 391         int err;
 392         unsigned int bpl = 0;
 393
 394         if (!chip) {
 395                 pr_err("DEBUG: cx25821 can't find device struct. Can't proceed with open\n");
 396                 return -ENODEV;
 397         }
 398
 399         err =
 400             snd_pcm_hw_constraint_pow2(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS);
 401         if (err < 0)
 402                 goto _error;
 403
 404         chip->substream = substream;
 405
 406         runtime->hw = snd_cx25821_digital_hw;
 407
 408         if (cx25821_sram_channels[AUDIO_SRAM_CHANNEL].fifo_size !=
 409             DEFAULT_FIFO_SIZE) {
 410                 /* since there are 3 audio Clusters */
 411                 bpl = cx25821_sram_channels[AUDIO_SRAM_CHANNEL].fifo_size / 3;
 412                 bpl &= ~7;      /* must be multiple of 8 */
 413
 414                 if (bpl > AUDIO_LINE_SIZE)
 415                         bpl = AUDIO_LINE_SIZE;
 416
 417                 runtime->hw.period_bytes_min = bpl;
 418                 runtime->hw.period_bytes_max = bpl;
 419         }
 420
 421         return 0;
 422 _error:
 423         dprintk(1, "Error opening PCM!\n");
 424         return err;
 425 }
 426
 427 /*
 428  * audio close callback
 429  */
 430 static int snd_cx25821_close(struct snd_pcm_substream *substream)
 431 {
 432         return 0;
 433 }
 434
 435 /*
 436  * hw_params callback
 437  */
 438 static int snd_cx25821_hw_params(struct snd_pcm_substream *substream,
 439                                  struct snd_pcm_hw_params *hw_params)
 440 {
 441         struct cx25821_audio_dev *chip = snd_pcm_substream_chip(substream);
 442         struct videobuf_dmabuf *dma;
 443
 444         struct cx25821_audio_buffer *buf;
 445         int ret;
 446
 447         if (substream->runtime->dma_area) {
 448                 dsp_buffer_free(chip);
 449                 substream->runtime->dma_area = NULL;
 450         }
 451
 452         chip->period_size = params_period_bytes(hw_params);
 453         chip->num_periods = params_periods(hw_params);
 454         chip->dma_size = chip->period_size * params_periods(hw_params);
 455
 456         BUG_ON(!chip->dma_size);
 457         BUG_ON(chip->num_periods & (chip->num_periods - 1));
 458
 459         buf = kzalloc(sizeof(*buf), GFP_KERNEL);
 460         if (NULL == buf)
 461                 return -ENOMEM;
 462
 463         if (chip->period_size > AUDIO_LINE_SIZE)
 464                 chip->period_size = AUDIO_LINE_SIZE;
 465
 466         buf->bpl = chip->period_size;
 467
 468         dma = &buf->dma;
 469         videobuf_dma_init(dma);
 470         ret = videobuf_dma_init_kernel(dma, PCI_DMA_FROMDEVICE,
 471                                        (PAGE_ALIGN(chip->dma_size) >>
 472                                         PAGE_SHIFT));
 473         if (ret < 0)
 474                 goto error;
 475
 476         ret = videobuf_dma_map(&chip->pci->dev, dma);
 477         if (ret < 0)
 478                 goto error;
 479
 480         ret =
 481             cx25821_risc_databuffer_audio(chip->pci, &buf->risc, dma->sglist,
 482                                           chip->period_size, chip->num_periods,
 483                                           1);
 484         if (ret < 0) {
 485                 pr_info("DEBUG: ERROR after cx25821_risc_databuffer_audio()\n");
 486                 goto error;
 487         }
 488
 489         /* Loop back to start of program */
 490         buf->risc.jmp[0] = cpu_to_le32(RISC_JUMP | RISC_IRQ1 | RISC_CNT_INC);
 491         buf->risc.jmp[1] = cpu_to_le32(buf->risc.dma);
 492         buf->risc.jmp[2] = cpu_to_le32(0);      /* bits 63-32 */
 493
 494         chip->buf = buf;
 495         chip->dma_risc = dma;
 496
 497         substream->runtime->dma_area = chip->dma_risc->vaddr;
 498         substream->runtime->dma_bytes = chip->dma_size;
 499         substream->runtime->dma_addr = 0;
 500
 501         return 0;
 502
 503 error:
 504         kfree(buf);
 505         return ret;
 506 }
 507
 508 /*
 509  * hw free callback
 510  */
 511 static int snd_cx25821_hw_free(struct snd_pcm_substream *substream)
 512 {
 513         struct cx25821_audio_dev *chip = snd_pcm_substream_chip(substream);
 514
 515         if (substream->runtime->dma_area) {
 516                 dsp_buffer_free(chip);
 517                 substream->runtime->dma_area = NULL;
 518         }
 519
 520         return 0;
 521 }
 522
 523 /*
 524  * prepare callback
 525  */
 526 static int snd_cx25821_prepare(struct snd_pcm_substream *substream)
 527 {
 528         return 0;
 529 }
 530
 531 /*
 532  * trigger callback
 533  */
 534 static int snd_cx25821_card_trigger(struct snd_pcm_substream *substream,
 535                                     int cmd)
 536 {
 537         struct cx25821_audio_dev *chip = snd_pcm_substream_chip(substream);
 538         int err = 0;
 539
 540         /* Local interrupts are already disabled by ALSA */
 541         spin_lock(&chip->reg_lock);
 542
 543         switch (cmd) {
 544         case SNDRV_PCM_TRIGGER_START:
 545                 err = _cx25821_start_audio_dma(chip);
 546                 break;
 547         case SNDRV_PCM_TRIGGER_STOP:
 548                 err = _cx25821_stop_audio_dma(chip);
 549                 break;
 550         default:
 551                 err = -EINVAL;
 552                 break;
 553         }
 554
 555         spin_unlock(&chip->reg_lock);
 556
 557         return err;
 558 }
 559
 560 /*
 561  * pointer callback
 562  */
 563 static snd_pcm_uframes_t snd_cx25821_pointer(struct snd_pcm_substream
 564                                              *substream)
 565 {
 566         struct cx25821_audio_dev *chip = snd_pcm_substream_chip(substream);
 567         struct snd_pcm_runtime *runtime = substream->runtime;
 568         u16 count;
 569
 570         count = atomic_read(&chip->count);
 571
 572         return runtime->period_size * (count & (runtime->periods - 1));
 573 }
 574
 575 /*
 576  * page callback (needed for mmap)
 577  */
 578 static struct page *snd_cx25821_page(struct snd_pcm_substream *substream,
 579                                      unsigned long offset)
 580 {
 581         void *pageptr = substream->runtime->dma_area + offset;
 582
 583         return vmalloc_to_page(pageptr);
 584 }
 585
 586 /*
 587  * operators
 588  */
 589 static struct snd_pcm_ops snd_cx25821_pcm_ops = {
 590         .open = snd_cx25821_pcm_open,
 591         .close = snd_cx25821_close,
 592         .ioctl = snd_pcm_lib_ioctl,
 593         .hw_params = snd_cx25821_hw_params,
 594         .hw_free = snd_cx25821_hw_free,
 595         .prepare = snd_cx25821_prepare,
 596         .trigger = snd_cx25821_card_trigger,
 597         .pointer = snd_cx25821_pointer,
 598         .page = snd_cx25821_page,
 599 };
 600
 601 /*
 602  * ALSA create a PCM device:  Called when initializing the board.
 603  * Sets up the name and hooks up the callbacks
 604  */
 605 static int snd_cx25821_pcm(struct cx25821_audio_dev *chip, int device,
 606                            char *name)
 607 {
 608         struct snd_pcm *pcm;
 609         int err;
 610
 611         err = snd_pcm_new(chip->card, name, device, 0, 1, &pcm);
 612         if (err < 0) {
 613                 pr_info("ERROR: FAILED snd_pcm_new() in %s\n", __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 DEFINE_PCI_DEVICE_TABLE(cx25821_audio_pci_tbl) = {
 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                 pr_info("DEBUG ERROR: devno >= SNDRV_CARDS %s\n", __func__);
 679                 return -ENODEV;
 680         }
 681
 682         if (!enable[devno]) {
 683                 ++devno;
 684                 pr_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                 pr_info("DEBUG ERROR: cannot create snd_card_new in %s\n",
 692                         __func__);
 693                 return err;
 694         }
 695
 696         strcpy(card->driver, "cx25821");
 697
 698         /* Card "creation" */
 699         card->private_free = snd_cx25821_dev_free;
 700         chip = card->private_data;
 701         spin_lock_init(&chip->reg_lock);
 702
 703         chip->dev = dev;
 704         chip->card = card;
 705         chip->pci = dev->pci;
 706         chip->iobase = pci_resource_start(dev->pci, 0);
 707
 708         chip->irq = dev->pci->irq;
 709
 710         err = request_irq(dev->pci->irq, cx25821_irq,
 711                           IRQF_SHARED, chip->dev->name, chip);
 712
 713         if (err < 0) {
 714                 pr_err("ERROR %s: can't get IRQ %d for ALSA\n",
 715                        chip->dev->name, dev->pci->irq);
 716                 goto error;
 717         }
 718
 719         err = snd_cx25821_pcm(chip, 0, "cx25821 Digital");
 720         if (err < 0) {
 721                 pr_info("DEBUG ERROR: cannot create snd_cx25821_pcm %s\n",
 722                         __func__);
 723                 goto error;
 724         }
 725
 726         snd_card_set_dev(card, &chip->pci->dev);
 727
 728         strcpy(card->shortname, "cx25821");
 729         sprintf(card->longname, "%s at 0x%lx irq %d", chip->dev->name,
 730                 chip->iobase, chip->irq);
 731         strcpy(card->mixername, "CX25821");
 732
 733         pr_info("%s/%i: ALSA support for cx25821 boards\n",
 734                 card->driver, devno);
 735
 736         err = snd_card_register(card);
 737         if (err < 0) {
 738                 pr_info("DEBUG ERROR: cannot register sound card %s\n",
 739                         __func__);
 740                 goto error;
 741         }
 742
 743         snd_cx25821_cards[devno] = card;
 744
 745         devno++;
 746         return 0;
 747
 748 error:
 749         snd_card_free(card);
 750         return err;
 751 }
 752
 753 /****************************************************************************
 754                                 LINUX MODULE INIT
 755  ****************************************************************************/
 756 static void cx25821_audio_fini(void)
 757 {
 758         snd_card_free(snd_cx25821_cards[0]);
 759 }
 760
 761 /*
 762  * Module initializer
 763  *
 764  * Loops through present saa7134 cards, and assigns an ALSA device
 765  * to each one
 766  *
 767  */
 768 static int cx25821_alsa_init(void)
 769 {
 770         struct cx25821_dev *dev = NULL;
 771         struct list_head *list;
 772
 773         mutex_lock(&cx25821_devlist_mutex);
 774         list_for_each(list, &cx25821_devlist) {
 775                 dev = list_entry(list, struct cx25821_dev, devlist);
 776                 cx25821_audio_initdev(dev);
 777         }
 778         mutex_unlock(&cx25821_devlist_mutex);
 779
 780         if (dev == NULL)
 781                 pr_info("ERROR ALSA: no cx25821 cards found\n");
 782
 783         return 0;
 784
 785 }
 786
 787 late_initcall(cx25821_alsa_init);
 788 module_exit(cx25821_audio_fini);
 789
 790 /* ----------------------------------------------------------- */
 791 /*
 792  * Local variables:
 793  * c-basic-offset: 8
 794  * End:
 795  */