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
  31 #include <asm/delay.h>
  32 #include <sound/core.h>
  33 #include <sound/pcm.h>
  34 #include <sound/pcm_params.h>
  35 #include <sound/control.h>
  36 #include <sound/initval.h>
  37 #include <sound/tlv.h>
  38
  39 #include "cx25821.h"
  40 #include "cx25821-reg.h"
  41
  42 #define AUDIO_SRAM_CHANNEL      SRAM_CH08
  43
  44 #define dprintk(level,fmt, arg...)      if (debug >= level) \
  45         printk(KERN_INFO "%s/1: " fmt, chip->dev->name , ## arg)
  46
  47 #define dprintk_core(level,fmt, arg...) if (debug >= level) \
  48         printk(KERN_DEBUG "%s/1: " fmt, chip->dev->name , ## arg)
  49
  50 /****************************************************************************
  51         Data type declarations - Can be moded to a header file later
  52  ****************************************************************************/
  53
  54 static struct snd_card *snd_cx25821_cards[SNDRV_CARDS];
  55 static int devno;
  56
  57 struct cx25821_audio_dev {
  58         struct cx25821_dev *dev;
  59         struct cx25821_dmaqueue q;
  60
  61         /* pci i/o */
  62         struct pci_dev *pci;
  63
  64         /* audio controls */
  65         int irq;
  66
  67         struct snd_card *card;
  68
  69         unsigned long iobase;
  70         spinlock_t reg_lock;
  71         atomic_t count;
  72
  73         unsigned int dma_size;
  74         unsigned int period_size;
  75         unsigned int num_periods;
  76
  77         struct videobuf_dmabuf *dma_risc;
  78
  79         struct cx25821_buffer *buf;
  80
  81         struct snd_pcm_substream *substream;
  82 };
  83 typedef struct cx25821_audio_dev snd_cx25821_card_t;
  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(snd_cx25821_card_t * 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         cx_write(AUD_A_GPCNT_CTL, GP_COUNT_CONTROL_RESET);      //GP_COUNT_CONTROL_RESET = 0x3
 161         atomic_set(&chip->count, 0);
 162
 163         //Set the input mode to 16-bit
 164         tmp = cx_read(AUD_A_CFG);
 165         cx_write(AUD_A_CFG,
 166                  tmp | FLD_AUD_DST_PK_MODE | FLD_AUD_DST_ENABLE |
 167                  FLD_AUD_CLK_ENABLE);
 168
 169         //printk(KERN_INFO "DEBUG: Start audio DMA, %d B/line, cmds_start(0x%x)= %d lines/FIFO, %d periods, %d "
 170         //      "byte buffer\n", buf->bpl, audio_ch->cmds_start, cx_read(audio_ch->cmds_start + 12)>>1,
 171         //      chip->num_periods, buf->bpl * chip->num_periods);
 172
 173         /* Enables corresponding bits at AUD_INT_STAT */
 174         cx_write(AUD_A_INT_MSK,
 175                  FLD_AUD_DST_RISCI1 | FLD_AUD_DST_OF | FLD_AUD_DST_SYNC |
 176                  FLD_AUD_DST_OPC_ERR);
 177
 178         /* Clean any pending interrupt bits already set */
 179         cx_write(AUD_A_INT_STAT, ~0);
 180
 181         /* enable audio irqs */
 182         cx_set(PCI_INT_MSK, chip->dev->pci_irqmask | PCI_MSK_AUD_INT);
 183
 184         // Turn on audio downstream fifo and risc enable 0x101
 185         tmp = cx_read(AUD_INT_DMA_CTL);
 186         cx_set(AUD_INT_DMA_CTL,
 187                tmp | (FLD_AUD_DST_A_RISC_EN | FLD_AUD_DST_A_FIFO_EN));
 188
 189         mdelay(100);
 190         return 0;
 191 }
 192
 193 /*
 194  * BOARD Specific: Resets audio DMA
 195  */
 196 static int _cx25821_stop_audio_dma(snd_cx25821_card_t * chip)
 197 {
 198         struct cx25821_dev *dev = chip->dev;
 199
 200         /* stop dma */
 201         cx_clear(AUD_INT_DMA_CTL,
 202                  FLD_AUD_DST_A_RISC_EN | FLD_AUD_DST_A_FIFO_EN);
 203
 204         /* disable irqs */
 205         cx_clear(PCI_INT_MSK, PCI_MSK_AUD_INT);
 206         cx_clear(AUD_A_INT_MSK,
 207                  AUD_INT_OPC_ERR | AUD_INT_DN_SYNC | AUD_INT_DN_RISCI2 |
 208                  AUD_INT_DN_RISCI1);
 209
 210         return 0;
 211 }
 212
 213 #define MAX_IRQ_LOOP 50
 214
 215 /*
 216  * BOARD Specific: IRQ dma bits
 217  */
 218 static char *cx25821_aud_irqs[32] = {
 219         "dn_risci1", "up_risci1", "rds_dn_risc1",       /* 0-2 */
 220         NULL,                   /* reserved */
 221         "dn_risci2", "up_risci2", "rds_dn_risc2",       /* 4-6 */
 222         NULL,                   /* reserved */
 223         "dnf_of", "upf_uf", "rds_dnf_uf",       /* 8-10 */
 224         NULL,                   /* reserved */
 225         "dn_sync", "up_sync", "rds_dn_sync",    /* 12-14 */
 226         NULL,                   /* reserved */
 227         "opc_err", "par_err", "rip_err",        /* 16-18 */
 228         "pci_abort", "ber_irq", "mchg_irq"      /* 19-21 */
 229 };
 230
 231 /*
 232  * BOARD Specific: Threats IRQ audio specific calls
 233  */
 234 static void cx25821_aud_irq(snd_cx25821_card_t * chip, u32 status, u32 mask)
 235 {
 236         struct cx25821_dev *dev = chip->dev;
 237
 238         if (0 == (status & mask)) {
 239                 return;
 240         }
 241
 242         cx_write(AUD_A_INT_STAT, status);
 243         if (debug > 1 || (status & mask & ~0xff))
 244                 cx25821_print_irqbits(dev->name, "irq aud",
 245                                       cx25821_aud_irqs,
 246                                       ARRAY_SIZE(cx25821_aud_irqs), status,
 247                                       mask);
 248
 249         /* risc op code error */
 250         if (status & AUD_INT_OPC_ERR) {
 251                 printk(KERN_WARNING "WARNING %s/1: Audio risc op code error\n",
 252                        dev->name);
 253
 254                 cx_clear(AUD_INT_DMA_CTL,
 255                          FLD_AUD_DST_A_RISC_EN | FLD_AUD_DST_A_FIFO_EN);
 256                 cx25821_sram_channel_dump_audio(dev,
 257                                                 &cx25821_sram_channels
 258                                                 [AUDIO_SRAM_CHANNEL]);
 259         }
 260         if (status & AUD_INT_DN_SYNC) {
 261                 printk(KERN_WARNING "WARNING %s: Downstream sync error!\n",
 262                        dev->name);
 263                 cx_write(AUD_A_GPCNT_CTL, GP_COUNT_CONTROL_RESET);
 264                 return;
 265         }
 266
 267         /* risc1 downstream */
 268         if (status & AUD_INT_DN_RISCI1) {
 269                 atomic_set(&chip->count, cx_read(AUD_A_GPCNT));
 270                 snd_pcm_period_elapsed(chip->substream);
 271         }
 272 }
 273
 274 /*
 275  * BOARD Specific: Handles IRQ calls
 276  */
 277 static irqreturn_t cx25821_irq(int irq, void *dev_id)
 278 {
 279         snd_cx25821_card_t *chip = dev_id;
 280         struct cx25821_dev *dev = chip->dev;
 281         u32 status, pci_status;
 282         u32 audint_status, audint_mask;
 283         int loop, handled = 0;
 284         int audint_count = 0;
 285
 286         audint_status = cx_read(AUD_A_INT_STAT);
 287         audint_mask = cx_read(AUD_A_INT_MSK);
 288         audint_count = cx_read(AUD_A_GPCNT);
 289         status = cx_read(PCI_INT_STAT);
 290
 291         for (loop = 0; loop < 1; loop++) {
 292                 status = cx_read(PCI_INT_STAT);
 293                 if (0 == status) {
 294                         status = cx_read(PCI_INT_STAT);
 295                         audint_status = cx_read(AUD_A_INT_STAT);
 296                         audint_mask = cx_read(AUD_A_INT_MSK);
 297
 298                         if (status) {
 299                                 handled = 1;
 300                                 cx_write(PCI_INT_STAT, status);
 301
 302                                 cx25821_aud_irq(chip, audint_status,
 303                                                 audint_mask);
 304                                 break;
 305                         } else
 306                                 goto out;
 307                 }
 308
 309                 handled = 1;
 310                 cx_write(PCI_INT_STAT, status);
 311
 312                 cx25821_aud_irq(chip, audint_status, audint_mask);
 313         }
 314
 315         pci_status = cx_read(PCI_INT_STAT);
 316
 317         if (handled)
 318                 cx_write(PCI_INT_STAT, pci_status);
 319
 320       out:
 321         return IRQ_RETVAL(handled);
 322 }
 323
 324 static int dsp_buffer_free(snd_cx25821_card_t * chip)
 325 {
 326         BUG_ON(!chip->dma_size);
 327
 328         dprintk(2, "Freeing buffer\n");
 329         videobuf_sg_dma_unmap(&chip->pci->dev, chip->dma_risc);
 330         videobuf_dma_free(chip->dma_risc);
 331         btcx_riscmem_free(chip->pci, &chip->buf->risc);
 332         kfree(chip->buf);
 333
 334         chip->dma_risc = NULL;
 335         chip->dma_size = 0;
 336
 337         return 0;
 338 }
 339
 340 /****************************************************************************
 341                                 ALSA PCM Interface
 342  ****************************************************************************/
 343
 344 /*
 345  * Digital hardware definition
 346  */
 347 #define DEFAULT_FIFO_SIZE       384
 348 static struct snd_pcm_hardware snd_cx25821_digital_hw = {
 349         .info = SNDRV_PCM_INFO_MMAP |
 350             SNDRV_PCM_INFO_INTERLEAVED |
 351             SNDRV_PCM_INFO_BLOCK_TRANSFER | SNDRV_PCM_INFO_MMAP_VALID,
 352         .formats = SNDRV_PCM_FMTBIT_S16_LE,
 353
 354         .rates = SNDRV_PCM_RATE_48000,
 355         .rate_min = 48000,
 356         .rate_max = 48000,
 357         .channels_min = 2,
 358         .channels_max = 2,
 359         /* Analog audio output will be full of clicks and pops if there
 360            are not exactly four lines in the SRAM FIFO buffer.  */
 361         .period_bytes_min = DEFAULT_FIFO_SIZE / 3,
 362         .period_bytes_max = DEFAULT_FIFO_SIZE / 3,
 363         .periods_min = 1,
 364         .periods_max = AUDIO_LINE_SIZE,
 365         .buffer_bytes_max = (AUDIO_LINE_SIZE * AUDIO_LINE_SIZE),        //128*128 = 16384 = 1024 * 16
 366 };
 367
 368 /*
 369  * audio pcm capture open callback
 370  */
 371 static int snd_cx25821_pcm_open(struct snd_pcm_substream *substream)
 372 {
 373         snd_cx25821_card_t *chip = snd_pcm_substream_chip(substream);
 374         struct snd_pcm_runtime *runtime = substream->runtime;
 375         int err;
 376         unsigned int bpl = 0;
 377
 378         if (!chip) {
 379                 printk(KERN_ERR "DEBUG: cx25821 can't find device struct."
 380                        " Can't proceed with open\n");
 381                 return -ENODEV;
 382         }
 383
 384         err =
 385             snd_pcm_hw_constraint_pow2(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS);
 386         if (err < 0)
 387                 goto _error;
 388
 389         chip->substream = substream;
 390
 391         runtime->hw = snd_cx25821_digital_hw;
 392
 393         if (cx25821_sram_channels[AUDIO_SRAM_CHANNEL].fifo_size !=
 394             DEFAULT_FIFO_SIZE) {
 395                 bpl = cx25821_sram_channels[AUDIO_SRAM_CHANNEL].fifo_size / 3;  //since there are 3 audio Clusters
 396                 bpl &= ~7;      /* must be multiple of 8 */
 397
 398                 if (bpl > AUDIO_LINE_SIZE) {
 399                         bpl = AUDIO_LINE_SIZE;
 400                 }
 401                 runtime->hw.period_bytes_min = bpl;
 402                 runtime->hw.period_bytes_max = bpl;
 403         }
 404
 405         return 0;
 406       _error:
 407         dprintk(1, "Error opening PCM!\n");
 408         return err;
 409 }
 410
 411 /*
 412  * audio close callback
 413  */
 414 static int snd_cx25821_close(struct snd_pcm_substream *substream)
 415 {
 416         return 0;
 417 }
 418
 419 /*
 420  * hw_params callback
 421  */
 422 static int snd_cx25821_hw_params(struct snd_pcm_substream *substream,
 423                                  struct snd_pcm_hw_params *hw_params)
 424 {
 425         snd_cx25821_card_t *chip = snd_pcm_substream_chip(substream);
 426         struct videobuf_dmabuf *dma;
 427
 428         struct cx25821_buffer *buf;
 429         int ret;
 430
 431         if (substream->runtime->dma_area) {
 432                 dsp_buffer_free(chip);
 433                 substream->runtime->dma_area = NULL;
 434         }
 435
 436         chip->period_size = params_period_bytes(hw_params);
 437         chip->num_periods = params_periods(hw_params);
 438         chip->dma_size = chip->period_size * params_periods(hw_params);
 439
 440         BUG_ON(!chip->dma_size);
 441         BUG_ON(chip->num_periods & (chip->num_periods - 1));
 442
 443         buf = videobuf_sg_alloc(sizeof(*buf));
 444         if (NULL == buf)
 445                 return -ENOMEM;
 446
 447         if (chip->period_size > AUDIO_LINE_SIZE) {
 448                 chip->period_size = AUDIO_LINE_SIZE;
 449         }
 450
 451         buf->vb.memory = V4L2_MEMORY_MMAP;
 452         buf->vb.field = V4L2_FIELD_NONE;
 453         buf->vb.width = chip->period_size;
 454         buf->bpl = chip->period_size;
 455         buf->vb.height = chip->num_periods;
 456         buf->vb.size = chip->dma_size;
 457
 458         dma = videobuf_to_dma(&buf->vb);
 459         videobuf_dma_init(dma);
 460
 461         ret = videobuf_dma_init_kernel(dma, PCI_DMA_FROMDEVICE,
 462                                        (PAGE_ALIGN(buf->vb.size) >>
 463                                         PAGE_SHIFT));
 464         if (ret < 0)
 465                 goto error;
 466
 467         ret = videobuf_sg_dma_map(&chip->pci->dev, dma);
 468         if (ret < 0)
 469                 goto error;
 470
 471         ret =
 472             cx25821_risc_databuffer_audio(chip->pci, &buf->risc, dma->sglist,
 473                                           buf->vb.width, buf->vb.height, 1);
 474         if (ret < 0) {
 475                 printk(KERN_INFO
 476                        "DEBUG: ERROR after cx25821_risc_databuffer_audio() \n");
 477                 goto error;
 478         }
 479
 480         /* Loop back to start of program */
 481         buf->risc.jmp[0] = cpu_to_le32(RISC_JUMP | RISC_IRQ1 | RISC_CNT_INC);
 482         buf->risc.jmp[1] = cpu_to_le32(buf->risc.dma);
 483         buf->risc.jmp[2] = cpu_to_le32(0);      /* bits 63-32 */
 484
 485         buf->vb.state = VIDEOBUF_PREPARED;
 486
 487         chip->buf = buf;
 488         chip->dma_risc = dma;
 489
 490         substream->runtime->dma_area = chip->dma_risc->vmalloc;
 491         substream->runtime->dma_bytes = chip->dma_size;
 492         substream->runtime->dma_addr = 0;
 493
 494         return 0;
 495
 496       error:
 497         kfree(buf);
 498         return ret;
 499 }
 500
 501 /*
 502  * hw free callback
 503  */
 504 static int snd_cx25821_hw_free(struct snd_pcm_substream *substream)
 505 {
 506         snd_cx25821_card_t *chip = snd_pcm_substream_chip(substream);
 507
 508         if (substream->runtime->dma_area) {
 509                 dsp_buffer_free(chip);
 510                 substream->runtime->dma_area = NULL;
 511         }
 512
 513         return 0;
 514 }
 515
 516 /*
 517  * prepare callback
 518  */
 519 static int snd_cx25821_prepare(struct snd_pcm_substream *substream)
 520 {
 521         return 0;
 522 }
 523
 524 /*
 525  * trigger callback
 526  */
 527 static int snd_cx25821_card_trigger(struct snd_pcm_substream *substream,
 528                                     int cmd)
 529 {
 530         snd_cx25821_card_t *chip = snd_pcm_substream_chip(substream);
 531         int err = 0;
 532
 533         /* Local interrupts are already disabled by ALSA */
 534         spin_lock(&chip->reg_lock);
 535
 536         switch (cmd) {
 537         case SNDRV_PCM_TRIGGER_START:
 538                 err = _cx25821_start_audio_dma(chip);
 539                 break;
 540         case SNDRV_PCM_TRIGGER_STOP:
 541                 err = _cx25821_stop_audio_dma(chip);
 542                 break;
 543         default:
 544                 err = -EINVAL;
 545                 break;
 546         }
 547
 548         spin_unlock(&chip->reg_lock);
 549
 550         return err;
 551 }
 552
 553 /*
 554  * pointer callback
 555  */
 556 static snd_pcm_uframes_t snd_cx25821_pointer(struct snd_pcm_substream
 557                                              *substream)
 558 {
 559         snd_cx25821_card_t *chip = snd_pcm_substream_chip(substream);
 560         struct snd_pcm_runtime *runtime = substream->runtime;
 561         u16 count;
 562
 563         count = atomic_read(&chip->count);
 564
 565         return runtime->period_size * (count & (runtime->periods - 1));
 566 }
 567
 568 /*
 569  * page callback (needed for mmap)
 570  */
 571 static struct page *snd_cx25821_page(struct snd_pcm_substream *substream,
 572                                      unsigned long offset)
 573 {
 574         void *pageptr = substream->runtime->dma_area + offset;
 575
 576         return vmalloc_to_page(pageptr);
 577 }
 578
 579 /*
 580  * operators
 581  */
 582 static struct snd_pcm_ops snd_cx25821_pcm_ops = {
 583         .open = snd_cx25821_pcm_open,
 584         .close = snd_cx25821_close,
 585         .ioctl = snd_pcm_lib_ioctl,
 586         .hw_params = snd_cx25821_hw_params,
 587         .hw_free = snd_cx25821_hw_free,
 588         .prepare = snd_cx25821_prepare,
 589         .trigger = snd_cx25821_card_trigger,
 590         .pointer = snd_cx25821_pointer,
 591         .page = snd_cx25821_page,
 592 };
 593
 594 /*
 595  * ALSA create a PCM device:  Called when initializing the board. Sets up the name and hooks up
 596  *  the callbacks
 597  */
 598 static int snd_cx25821_pcm(snd_cx25821_card_t * chip, int device, char *name)
 599 {
 600         struct snd_pcm *pcm;
 601         int err;
 602
 603         err = snd_pcm_new(chip->card, name, device, 0, 1, &pcm);
 604         if (err < 0) {
 605                 printk(KERN_INFO "ERROR: FAILED snd_pcm_new() in %s\n",
 606                        __func__);
 607                 return err;
 608         }
 609         pcm->private_data = chip;
 610         pcm->info_flags = 0;
 611         strcpy(pcm->name, name);
 612         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_cx25821_pcm_ops);
 613
 614         return 0;
 615 }
 616
 617 /****************************************************************************
 618                         Basic Flow for Sound Devices
 619  ****************************************************************************/
 620
 621 /*
 622  * PCI ID Table - 14f1:8801 and 14f1:8811 means function 1: Audio
 623  * Only boards with eeprom and byte 1 at eeprom=1 have it
 624  */
 625
 626 static struct pci_device_id cx25821_audio_pci_tbl[] __devinitdata = {
 627         {0x14f1, 0x0920, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
 628         {0,}
 629 };
 630
 631 MODULE_DEVICE_TABLE(pci, cx25821_audio_pci_tbl);
 632
 633 /*
 634  * Not used in the function snd_cx25821_dev_free so removing
 635  * from the file.
 636  */
 637 /*
 638 static int snd_cx25821_free(snd_cx25821_card_t *chip)
 639 {
 640         if (chip->irq >= 0)
 641                 free_irq(chip->irq, chip);
 642
 643         cx25821_dev_unregister(chip->dev);
 644         pci_disable_device(chip->pci);
 645
 646         return 0;
 647 }
 648 */
 649
 650 /*
 651  * Component Destructor
 652  */
 653 static void snd_cx25821_dev_free(struct snd_card *card)
 654 {
 655         snd_cx25821_card_t *chip = card->private_data;
 656
 657         //snd_cx25821_free(chip);
 658         snd_card_free(chip->card);
 659 }
 660
 661 /*
 662  * Alsa Constructor - Component probe
 663  */
 664 static int cx25821_audio_initdev(struct cx25821_dev *dev)
 665 {
 666         struct snd_card *card;
 667         snd_cx25821_card_t *chip;
 668         int err;
 669
 670         if (devno >= SNDRV_CARDS) {
 671                 printk(KERN_INFO "DEBUG ERROR: devno >= SNDRV_CARDS %s\n",
 672                        __func__);
 673                 return (-ENODEV);
 674         }
 675
 676         if (!enable[devno]) {
 677                 ++devno;
 678                 printk(KERN_INFO "DEBUG ERROR: !enable[devno] %s\n", __func__);
 679                 return (-ENOENT);
 680         }
 681
 682         err = snd_card_create(index[devno], id[devno], THIS_MODULE,
 683                          sizeof(snd_cx25821_card_t), &card);
 684         if (err < 0) {
 685                 printk(KERN_INFO
 686                        "DEBUG ERROR: cannot create snd_card_new in %s\n",
 687                        __func__);
 688                 return err;
 689         }
 690
 691         strcpy(card->driver, "cx25821");
 692
 693         /* Card "creation" */
 694         card->private_free = snd_cx25821_dev_free;
 695         chip = (snd_cx25821_card_t *) card->private_data;
 696         spin_lock_init(&chip->reg_lock);
 697
 698         chip->dev = dev;
 699         chip->card = card;
 700         chip->pci = dev->pci;
 701         chip->iobase = pci_resource_start(dev->pci, 0);
 702
 703         chip->irq = dev->pci->irq;
 704
 705         err = request_irq(dev->pci->irq, cx25821_irq,
 706                           IRQF_SHARED | IRQF_DISABLED, chip->dev->name, chip);
 707
 708         if (err < 0) {
 709                 printk(KERN_ERR "ERROR %s: can't get IRQ %d for ALSA\n",
 710                        chip->dev->name, dev->pci->irq);
 711                 goto error;
 712         }
 713
 714         if ((err = snd_cx25821_pcm(chip, 0, "cx25821 Digital")) < 0) {
 715                 printk(KERN_INFO
 716                        "DEBUG ERROR: cannot create snd_cx25821_pcm %s\n",
 717                        __func__);
 718                 goto error;
 719         }
 720
 721         snd_card_set_dev(card, &chip->pci->dev);
 722
 723         strcpy(card->shortname, "cx25821");
 724         sprintf(card->longname, "%s at 0x%lx irq %d", chip->dev->name,
 725                 chip->iobase, chip->irq);
 726         strcpy(card->mixername, "CX25821");
 727
 728         printk(KERN_INFO "%s/%i: ALSA support for cx25821 boards\n",
 729                card->driver, devno);
 730
 731         err = snd_card_register(card);
 732         if (err < 0) {
 733                 printk(KERN_INFO "DEBUG ERROR: cannot register sound card %s\n",
 734                        __func__);
 735                 goto error;
 736         }
 737
 738         snd_cx25821_cards[devno] = card;
 739
 740         devno++;
 741         return 0;
 742
 743       error:
 744         snd_card_free(card);
 745         return err;
 746 }
 747
 748 /****************************************************************************
 749                                 LINUX MODULE INIT
 750  ****************************************************************************/
 751 static void cx25821_audio_fini(void)
 752 {
 753         snd_card_free(snd_cx25821_cards[0]);
 754 }
 755
 756 /*
 757  * Module initializer
 758  *
 759  * Loops through present saa7134 cards, and assigns an ALSA device
 760  * to each one
 761  *
 762  */
 763 static int cx25821_alsa_init(void)
 764 {
 765         struct cx25821_dev *dev = NULL;
 766         struct list_head *list;
 767
 768         list_for_each(list, &cx25821_devlist) {
 769                 dev = list_entry(list, struct cx25821_dev, devlist);
 770                 cx25821_audio_initdev(dev);
 771         }
 772
 773         if (dev == NULL)
 774                 printk(KERN_INFO
 775                        "cx25821 ERROR ALSA: no cx25821 cards found\n");
 776
 777         return 0;
 778
 779 }
 780
 781 late_initcall(cx25821_alsa_init);
 782 module_exit(cx25821_audio_fini);
 783
 784 /* ----------------------------------------------------------- */
 785 /*
 786  * Local variables:
 787  * c-basic-offset: 8
 788  * End:
 789  */