drivers/media/video/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 bool 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, tmp | FLD_AUD_DST_PK_MODE | FLD_AUD_DST_ENABLE |
 180                  FLD_AUD_CLK_ENABLE);
 181
 182         /*
 183         pr_info("DEBUG: Start audio DMA, %d B/line, cmds_start(0x%x)= %d lines/FIFO, %d periods, %d byte buffer\n",
 184                 buf->bpl, audio_ch->cmds_start,
 185                 cx_read(audio_ch->cmds_start + 12)>>1,
 186                 chip->num_periods, buf->bpl * chip->num_periods);
 187         */
 188
 189         /* Enables corresponding bits at AUD_INT_STAT */
 190         cx_write(AUD_A_INT_MSK, FLD_AUD_DST_RISCI1 | FLD_AUD_DST_OF |
 191                  FLD_AUD_DST_SYNC | FLD_AUD_DST_OPC_ERR);
 192
 193         /* Clean any pending interrupt bits already set */
 194         cx_write(AUD_A_INT_STAT, ~0);
 195
 196         /* enable audio irqs */
 197         cx_set(PCI_INT_MSK, chip->dev->pci_irqmask | PCI_MSK_AUD_INT);
 198
 199         /* Turn on audio downstream fifo and risc enable 0x101 */
 200         tmp = cx_read(AUD_INT_DMA_CTL);
 201         cx_set(AUD_INT_DMA_CTL, tmp |
 202                (FLD_AUD_DST_A_RISC_EN | FLD_AUD_DST_A_FIFO_EN));
 203
 204         mdelay(100);
 205         return 0;
 206 }
 207
 208 /*
 209  * BOARD Specific: Resets audio DMA
 210  */
 211 static int _cx25821_stop_audio_dma(struct cx25821_audio_dev *chip)
 212 {
 213         struct cx25821_dev *dev = chip->dev;
 214
 215         /* stop dma */
 216         cx_clear(AUD_INT_DMA_CTL,
 217                  FLD_AUD_DST_A_RISC_EN | FLD_AUD_DST_A_FIFO_EN);
 218
 219         /* disable irqs */
 220         cx_clear(PCI_INT_MSK, PCI_MSK_AUD_INT);
 221         cx_clear(AUD_A_INT_MSK, AUD_INT_OPC_ERR | AUD_INT_DN_SYNC |
 222                  AUD_INT_DN_RISCI2 | AUD_INT_DN_RISCI1);
 223
 224         return 0;
 225 }
 226
 227 #define MAX_IRQ_LOOP 50
 228
 229 /*
 230  * BOARD Specific: IRQ dma bits
 231  */
 232 static char *cx25821_aud_irqs[32] = {
 233         "dn_risci1", "up_risci1", "rds_dn_risc1",       /* 0-2 */
 234         NULL,                                           /* reserved */
 235         "dn_risci2", "up_risci2", "rds_dn_risc2",       /* 4-6 */
 236         NULL,                                           /* reserved */
 237         "dnf_of", "upf_uf", "rds_dnf_uf",               /* 8-10 */
 238         NULL,                                           /* reserved */
 239         "dn_sync", "up_sync", "rds_dn_sync",            /* 12-14 */
 240         NULL,                                           /* reserved */
 241         "opc_err", "par_err", "rip_err",                /* 16-18 */
 242         "pci_abort", "ber_irq", "mchg_irq"              /* 19-21 */
 243 };
 244
 245 /*
 246  * BOARD Specific: Threats IRQ audio specific calls
 247  */
 248 static void cx25821_aud_irq(struct cx25821_audio_dev *chip, u32 status,
 249                             u32 mask)
 250 {
 251         struct cx25821_dev *dev = chip->dev;
 252
 253         if (0 == (status & mask))
 254                 return;
 255
 256         cx_write(AUD_A_INT_STAT, status);
 257         if (debug > 1 || (status & mask & ~0xff))
 258                 cx25821_print_irqbits(dev->name, "irq aud", cx25821_aud_irqs,
 259                                 ARRAY_SIZE(cx25821_aud_irqs), status, mask);
 260
 261         /* risc op code error */
 262         if (status & AUD_INT_OPC_ERR) {
 263                 pr_warn("WARNING %s/1: Audio risc op code error\n", 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[AUDIO_SRAM_CHANNEL]);
 269         }
 270         if (status & AUD_INT_DN_SYNC) {
 271                 pr_warn("WARNING %s: Downstream sync error!\n", dev->name);
 272                 cx_write(AUD_A_GPCNT_CTL, GP_COUNT_CONTROL_RESET);
 273                 return;
 274         }
 275
 276         /* risc1 downstream */
 277         if (status & AUD_INT_DN_RISCI1) {
 278                 atomic_set(&chip->count, cx_read(AUD_A_GPCNT));
 279                 snd_pcm_period_elapsed(chip->substream);
 280         }
 281 }
 282
 283 /*
 284  * BOARD Specific: Handles IRQ calls
 285  */
 286 static irqreturn_t cx25821_irq(int irq, void *dev_id)
 287 {
 288         struct cx25821_audio_dev *chip = dev_id;
 289         struct cx25821_dev *dev = chip->dev;
 290         u32 status, pci_status;
 291         u32 audint_status, audint_mask;
 292         int loop, handled = 0;
 293         int audint_count = 0;
 294
 295         audint_status = cx_read(AUD_A_INT_STAT);
 296         audint_mask = cx_read(AUD_A_INT_MSK);
 297         audint_count = cx_read(AUD_A_GPCNT);
 298         status = cx_read(PCI_INT_STAT);
 299
 300         for (loop = 0; loop < 1; loop++) {
 301                 status = cx_read(PCI_INT_STAT);
 302                 if (0 == status) {
 303                         status = cx_read(PCI_INT_STAT);
 304                         audint_status = cx_read(AUD_A_INT_STAT);
 305                         audint_mask = cx_read(AUD_A_INT_MSK);
 306
 307                         if (status) {
 308                                 handled = 1;
 309                                 cx_write(PCI_INT_STAT, status);
 310
 311                                 cx25821_aud_irq(chip, audint_status,
 312                                                 audint_mask);
 313                                 break;
 314                         } else {
 315                                 goto out;
 316                         }
 317                 }
 318
 319                 handled = 1;
 320                 cx_write(PCI_INT_STAT, status);
 321
 322                 cx25821_aud_irq(chip, audint_status, audint_mask);
 323         }
 324
 325         pci_status = cx_read(PCI_INT_STAT);
 326
 327         if (handled)
 328                 cx_write(PCI_INT_STAT, pci_status);
 329
 330 out:
 331         return IRQ_RETVAL(handled);
 332 }
 333
 334 static int dsp_buffer_free(struct cx25821_audio_dev *chip)
 335 {
 336         BUG_ON(!chip->dma_size);
 337
 338         dprintk(2, "Freeing buffer\n");
 339         videobuf_dma_unmap(&chip->pci->dev, chip->dma_risc);
 340         videobuf_dma_free(chip->dma_risc);
 341         btcx_riscmem_free(chip->pci, &chip->buf->risc);
 342         kfree(chip->buf);
 343
 344         chip->dma_risc = NULL;
 345         chip->dma_size = 0;
 346
 347         return 0;
 348 }
 349
 350 /****************************************************************************
 351                                 ALSA PCM Interface
 352  ****************************************************************************/
 353
 354 /*
 355  * Digital hardware definition
 356  */
 357 #define DEFAULT_FIFO_SIZE       384
 358 static struct snd_pcm_hardware snd_cx25821_digital_hw = {
 359         .info = SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
 360                 SNDRV_PCM_INFO_BLOCK_TRANSFER | SNDRV_PCM_INFO_MMAP_VALID,
 361         .formats = SNDRV_PCM_FMTBIT_S16_LE,
 362
 363         .rates = SNDRV_PCM_RATE_48000,
 364         .rate_min = 48000,
 365         .rate_max = 48000,
 366         .channels_min = 2,
 367         .channels_max = 2,
 368         /* Analog audio output will be full of clicks and pops if there
 369            are not exactly four lines in the SRAM FIFO buffer.  */
 370         .period_bytes_min = DEFAULT_FIFO_SIZE / 3,
 371         .period_bytes_max = DEFAULT_FIFO_SIZE / 3,
 372         .periods_min = 1,
 373         .periods_max = AUDIO_LINE_SIZE,
 374         /* 128 * 128 = 16384 = 1024 * 16 */
 375         .buffer_bytes_max = (AUDIO_LINE_SIZE * AUDIO_LINE_SIZE),
 376 };
 377
 378 /*
 379  * audio pcm capture open callback
 380  */
 381 static int snd_cx25821_pcm_open(struct snd_pcm_substream *substream)
 382 {
 383         struct cx25821_audio_dev *chip = snd_pcm_substream_chip(substream);
 384         struct snd_pcm_runtime *runtime = substream->runtime;
 385         int err;
 386         unsigned int bpl = 0;
 387
 388         if (!chip) {
 389                 pr_err("DEBUG: cx25821 can't find device struct. Can't proceed with open\n");
 390                 return -ENODEV;
 391         }
 392
 393         err = snd_pcm_hw_constraint_pow2(runtime, 0,
 394                                          SNDRV_PCM_HW_PARAM_PERIODS);
 395         if (err < 0)
 396                 goto _error;
 397
 398         chip->substream = substream;
 399
 400         runtime->hw = snd_cx25821_digital_hw;
 401
 402         if (cx25821_sram_channels[AUDIO_SRAM_CHANNEL].fifo_size !=
 403             DEFAULT_FIFO_SIZE) {
 404                 /* since there are 3 audio Clusters */
 405                 bpl = cx25821_sram_channels[AUDIO_SRAM_CHANNEL].fifo_size / 3;
 406                 bpl &= ~7;      /* must be multiple of 8 */
 407
 408                 if (bpl > AUDIO_LINE_SIZE)
 409                         bpl = AUDIO_LINE_SIZE;
 410
 411                 runtime->hw.period_bytes_min = bpl;
 412                 runtime->hw.period_bytes_max = bpl;
 413         }
 414
 415         return 0;
 416 _error:
 417         dprintk(1, "Error opening PCM!\n");
 418         return err;
 419 }
 420
 421 /*
 422  * audio close callback
 423  */
 424 static int snd_cx25821_close(struct snd_pcm_substream *substream)
 425 {
 426         return 0;
 427 }
 428
 429 /*
 430  * hw_params callback
 431  */
 432 static int snd_cx25821_hw_params(struct snd_pcm_substream *substream,
 433                                  struct snd_pcm_hw_params *hw_params)
 434 {
 435         struct cx25821_audio_dev *chip = snd_pcm_substream_chip(substream);
 436         struct videobuf_dmabuf *dma;
 437
 438         struct cx25821_audio_buffer *buf;
 439         int ret;
 440
 441         if (substream->runtime->dma_area) {
 442                 dsp_buffer_free(chip);
 443                 substream->runtime->dma_area = NULL;
 444         }
 445
 446         chip->period_size = params_period_bytes(hw_params);
 447         chip->num_periods = params_periods(hw_params);
 448         chip->dma_size = chip->period_size * params_periods(hw_params);
 449
 450         BUG_ON(!chip->dma_size);
 451         BUG_ON(chip->num_periods & (chip->num_periods - 1));
 452
 453         buf = kzalloc(sizeof(*buf), GFP_KERNEL);
 454         if (NULL == buf)
 455                 return -ENOMEM;
 456
 457         if (chip->period_size > AUDIO_LINE_SIZE)
 458                 chip->period_size = AUDIO_LINE_SIZE;
 459
 460         buf->bpl = chip->period_size;
 461
 462         dma = &buf->dma;
 463         videobuf_dma_init(dma);
 464         ret = videobuf_dma_init_kernel(dma, PCI_DMA_FROMDEVICE,
 465                         (PAGE_ALIGN(chip->dma_size) >> PAGE_SHIFT));
 466         if (ret < 0)
 467                 goto error;
 468
 469         ret = videobuf_dma_map(&chip->pci->dev, dma);
 470         if (ret < 0)
 471                 goto error;
 472
 473         ret = cx25821_risc_databuffer_audio(chip->pci, &buf->risc, dma->sglist,
 474                         chip->period_size, chip->num_periods, 1);
 475         if (ret < 0) {
 476                 pr_info("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         chip->buf = buf;
 486         chip->dma_risc = dma;
 487
 488         substream->runtime->dma_area = chip->dma_risc->vaddr;
 489         substream->runtime->dma_bytes = chip->dma_size;
 490         substream->runtime->dma_addr = 0;
 491
 492         return 0;
 493
 494 error:
 495         kfree(buf);
 496         return ret;
 497 }
 498
 499 /*
 500  * hw free callback
 501  */
 502 static int snd_cx25821_hw_free(struct snd_pcm_substream *substream)
 503 {
 504         struct cx25821_audio_dev *chip = snd_pcm_substream_chip(substream);
 505
 506         if (substream->runtime->dma_area) {
 507                 dsp_buffer_free(chip);
 508                 substream->runtime->dma_area = NULL;
 509         }
 510
 511         return 0;
 512 }
 513
 514 /*
 515  * prepare callback
 516  */
 517 static int snd_cx25821_prepare(struct snd_pcm_substream *substream)
 518 {
 519         return 0;
 520 }
 521
 522 /*
 523  * trigger callback
 524  */
 525 static int snd_cx25821_card_trigger(struct snd_pcm_substream *substream,
 526                                     int cmd)
 527 {
 528         struct cx25821_audio_dev *chip = snd_pcm_substream_chip(substream);
 529         int err = 0;
 530
 531         /* Local interrupts are already disabled by ALSA */
 532         spin_lock(&chip->reg_lock);
 533
 534         switch (cmd) {
 535         case SNDRV_PCM_TRIGGER_START:
 536                 err = _cx25821_start_audio_dma(chip);
 537                 break;
 538         case SNDRV_PCM_TRIGGER_STOP:
 539                 err = _cx25821_stop_audio_dma(chip);
 540                 break;
 541         default:
 542                 err = -EINVAL;
 543                 break;
 544         }
 545
 546         spin_unlock(&chip->reg_lock);
 547
 548         return err;
 549 }
 550
 551 /*
 552  * pointer callback
 553  */
 554 static snd_pcm_uframes_t snd_cx25821_pointer(struct snd_pcm_substream
 555                                              *substream)
 556 {
 557         struct cx25821_audio_dev *chip = snd_pcm_substream_chip(substream);
 558         struct snd_pcm_runtime *runtime = substream->runtime;
 559         u16 count;
 560
 561         count = atomic_read(&chip->count);
 562
 563         return runtime->period_size * (count & (runtime->periods - 1));
 564 }
 565
 566 /*
 567  * page callback (needed for mmap)
 568  */
 569 static struct page *snd_cx25821_page(struct snd_pcm_substream *substream,
 570                                      unsigned long offset)
 571 {
 572         void *pageptr = substream->runtime->dma_area + offset;
 573
 574         return vmalloc_to_page(pageptr);
 575 }
 576
 577 /*
 578  * operators
 579  */
 580 static struct snd_pcm_ops snd_cx25821_pcm_ops = {
 581         .open = snd_cx25821_pcm_open,
 582         .close = snd_cx25821_close,
 583         .ioctl = snd_pcm_lib_ioctl,
 584         .hw_params = snd_cx25821_hw_params,
 585         .hw_free = snd_cx25821_hw_free,
 586         .prepare = snd_cx25821_prepare,
 587         .trigger = snd_cx25821_card_trigger,
 588         .pointer = snd_cx25821_pointer,
 589         .page = snd_cx25821_page,
 590 };
 591
 592 /*
 593  * ALSA create a PCM device:  Called when initializing the board.
 594  * Sets up the name and hooks up the callbacks
 595  */
 596 static int snd_cx25821_pcm(struct cx25821_audio_dev *chip, int device,
 597                            char *name)
 598 {
 599         struct snd_pcm *pcm;
 600         int err;
 601
 602         err = snd_pcm_new(chip->card, name, device, 0, 1, &pcm);
 603         if (err < 0) {
 604                 pr_info("ERROR: FAILED snd_pcm_new() in %s\n", __func__);
 605                 return err;
 606         }
 607         pcm->private_data = chip;
 608         pcm->info_flags = 0;
 609         strcpy(pcm->name, name);
 610         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_cx25821_pcm_ops);
 611
 612         return 0;
 613 }
 614
 615 /****************************************************************************
 616                         Basic Flow for Sound Devices
 617  ****************************************************************************/
 618
 619 /*
 620  * PCI ID Table - 14f1:8801 and 14f1:8811 means function 1: Audio
 621  * Only boards with eeprom and byte 1 at eeprom=1 have it
 622  */
 623
 624 static DEFINE_PCI_DEVICE_TABLE(cx25821_audio_pci_tbl) = {
 625         {0x14f1, 0x0920, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
 626         {0,}
 627 };
 628
 629 MODULE_DEVICE_TABLE(pci, cx25821_audio_pci_tbl);
 630
 631 /*
 632  * Not used in the function snd_cx25821_dev_free so removing
 633  * from the file.
 634  */
 635 /*
 636 static int snd_cx25821_free(struct cx25821_audio_dev *chip)
 637 {
 638         if (chip->irq >= 0)
 639                 free_irq(chip->irq, chip);
 640
 641         cx25821_dev_unregister(chip->dev);
 642         pci_disable_device(chip->pci);
 643
 644         return 0;
 645 }
 646 */
 647
 648 /*
 649  * Component Destructor
 650  */
 651 static void snd_cx25821_dev_free(struct snd_card *card)
 652 {
 653         struct cx25821_audio_dev *chip = card->private_data;
 654
 655         /* snd_cx25821_free(chip); */
 656         snd_card_free(chip->card);
 657 }
 658
 659 /*
 660  * Alsa Constructor - Component probe
 661  */
 662 static int cx25821_audio_initdev(struct cx25821_dev *dev)
 663 {
 664         struct snd_card *card;
 665         struct cx25821_audio_dev *chip;
 666         int err;
 667
 668         if (devno >= SNDRV_CARDS) {
 669                 pr_info("DEBUG ERROR: devno >= SNDRV_CARDS %s\n", __func__);
 670                 return -ENODEV;
 671         }
 672
 673         if (!enable[devno]) {
 674                 ++devno;
 675                 pr_info("DEBUG ERROR: !enable[devno] %s\n", __func__);
 676                 return -ENOENT;
 677         }
 678
 679         err = snd_card_create(index[devno], id[devno], THIS_MODULE,
 680                         sizeof(struct cx25821_audio_dev), &card);
 681         if (err < 0) {
 682                 pr_info("DEBUG ERROR: cannot create snd_card_new in %s\n",
 683                         __func__);
 684                 return err;
 685         }
 686
 687         strcpy(card->driver, "cx25821");
 688
 689         /* Card "creation" */
 690         card->private_free = snd_cx25821_dev_free;
 691         chip = card->private_data;
 692         spin_lock_init(&chip->reg_lock);
 693
 694         chip->dev = dev;
 695         chip->card = card;
 696         chip->pci = dev->pci;
 697         chip->iobase = pci_resource_start(dev->pci, 0);
 698
 699         chip->irq = dev->pci->irq;
 700
 701         err = request_irq(dev->pci->irq, cx25821_irq,
 702                           IRQF_SHARED, chip->dev->name, chip);
 703
 704         if (err < 0) {
 705                 pr_err("ERROR %s: can't get IRQ %d for ALSA\n", chip->dev->name,
 706                         dev->pci->irq);
 707                 goto error;
 708         }
 709
 710         err = snd_cx25821_pcm(chip, 0, "cx25821 Digital");
 711         if (err < 0) {
 712                 pr_info("DEBUG ERROR: cannot create snd_cx25821_pcm %s\n",
 713                         __func__);
 714                 goto error;
 715         }
 716
 717         snd_card_set_dev(card, &chip->pci->dev);
 718
 719         strcpy(card->shortname, "cx25821");
 720         sprintf(card->longname, "%s at 0x%lx irq %d", chip->dev->name,
 721                 chip->iobase, chip->irq);
 722         strcpy(card->mixername, "CX25821");
 723
 724         pr_info("%s/%i: ALSA support for cx25821 boards\n", card->driver,
 725                 devno);
 726
 727         err = snd_card_register(card);
 728         if (err < 0) {
 729                 pr_info("DEBUG ERROR: cannot register sound card %s\n",
 730                         __func__);
 731                 goto error;
 732         }
 733
 734         snd_cx25821_cards[devno] = card;
 735
 736         devno++;
 737         return 0;
 738
 739 error:
 740         snd_card_free(card);
 741         return err;
 742 }
 743
 744 /****************************************************************************
 745                                 LINUX MODULE INIT
 746  ****************************************************************************/
 747 static void cx25821_audio_fini(void)
 748 {
 749         snd_card_free(snd_cx25821_cards[0]);
 750 }
 751
 752 /*
 753  * Module initializer
 754  *
 755  * Loops through present saa7134 cards, and assigns an ALSA device
 756  * to each one
 757  *
 758  */
 759 static int cx25821_alsa_init(void)
 760 {
 761         struct cx25821_dev *dev = NULL;
 762         struct list_head *list;
 763
 764         mutex_lock(&cx25821_devlist_mutex);
 765         list_for_each(list, &cx25821_devlist) {
 766                 dev = list_entry(list, struct cx25821_dev, devlist);
 767                 cx25821_audio_initdev(dev);
 768         }
 769         mutex_unlock(&cx25821_devlist_mutex);
 770
 771         if (dev == NULL)
 772                 pr_info("ERROR ALSA: no cx25821 cards found\n");
 773
 774         return 0;
 775
 776 }
 777
 778 late_initcall(cx25821_alsa_init);
 779 module_exit(cx25821_audio_fini);
 780
 781 /* ----------------------------------------------------------- */
 782 /*
 783  * Local variables:
 784  * c-basic-offset: 8
 785  * End:
 786  */