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 <asm/delay.h>
  33 #include <sound/core.h>
  34 #include <sound/pcm.h>
  35 #include <sound/pcm_params.h>
  36 #include <sound/control.h>
  37 #include <sound/initval.h>
  38 #include <sound/tlv.h>
  39
  40 #include "cx25821.h"
  41 #include "cx25821-reg.h"
  42
  43 #define AUDIO_SRAM_CHANNEL      SRAM_CH08
  44
  45 #define dprintk(level,fmt, arg...)      if (debug >= level) \
  46         printk(KERN_INFO "%s/1: " fmt, chip->dev->name , ## arg)
  47
  48 #define dprintk_core(level,fmt, arg...) if (debug >= level) \
  49         printk(KERN_DEBUG "%s/1: " fmt, chip->dev->name , ## arg)
  50
  51 /****************************************************************************
  52         Data type declarations - Can be moded to a header file later
  53  ****************************************************************************/
  54
  55 static struct snd_card *snd_cx25821_cards[SNDRV_CARDS];
  56 static int devno;
  57
  58 struct cx25821_audio_dev {
  59         struct cx25821_dev *dev;
  60         struct cx25821_dmaqueue q;
  61
  62         /* pci i/o */
  63         struct pci_dev *pci;
  64
  65         /* audio controls */
  66         int irq;
  67
  68         struct snd_card *card;
  69
  70         unsigned long iobase;
  71         spinlock_t reg_lock;
  72         atomic_t count;
  73
  74         unsigned int dma_size;
  75         unsigned int period_size;
  76         unsigned int num_periods;
  77
  78         struct videobuf_dmabuf *dma_risc;
  79
  80         struct cx25821_buffer *buf;
  81
  82         struct snd_pcm_substream *substream;
  83 };
  84 typedef struct cx25821_audio_dev snd_cx25821_card_t;
  85
  86
  87 /****************************************************************************
  88                         Module global static vars
  89  ****************************************************************************/
  90
  91 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;      /* Index 0-MAX */
  92 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;       /* ID for this card */
  93 static int enable[SNDRV_CARDS] = { 1,[1 ... (SNDRV_CARDS - 1)] = 1 };
  94
  95 module_param_array(enable, bool, NULL, 0444);
  96 MODULE_PARM_DESC(enable, "Enable cx25821 soundcard. default enabled.");
  97
  98 module_param_array(index, int, NULL, 0444);
  99 MODULE_PARM_DESC(index, "Index value for cx25821 capture interface(s).");
 100
 101 /****************************************************************************
 102                                 Module macros
 103  ****************************************************************************/
 104
 105 MODULE_DESCRIPTION("ALSA driver module for cx25821 based capture cards");
 106 MODULE_AUTHOR("Hiep Huynh");
 107 MODULE_LICENSE("GPL");
 108 MODULE_SUPPORTED_DEVICE("{{Conexant,25821}");   //"{{Conexant,23881},"
 109
 110 static unsigned int debug;
 111 module_param(debug, int, 0644);
 112 MODULE_PARM_DESC(debug, "enable debug messages");
 113
 114 /****************************************************************************
 115                         Module specific funtions
 116  ****************************************************************************/
 117 /* Constants taken from cx88-reg.h */
 118 #define AUD_INT_DN_RISCI1       (1 <<  0)
 119 #define AUD_INT_UP_RISCI1       (1 <<  1)
 120 #define AUD_INT_RDS_DN_RISCI1   (1 <<  2)
 121 #define AUD_INT_DN_RISCI2       (1 <<  4)       /* yes, 3 is skipped */
 122 #define AUD_INT_UP_RISCI2       (1 <<  5)
 123 #define AUD_INT_RDS_DN_RISCI2   (1 <<  6)
 124 #define AUD_INT_DN_SYNC         (1 << 12)
 125 #define AUD_INT_UP_SYNC         (1 << 13)
 126 #define AUD_INT_RDS_DN_SYNC     (1 << 14)
 127 #define AUD_INT_OPC_ERR         (1 << 16)
 128 #define AUD_INT_BER_IRQ         (1 << 20)
 129 #define AUD_INT_MCHG_IRQ        (1 << 21)
 130 #define GP_COUNT_CONTROL_RESET  0x3
 131
 132 #define PCI_MSK_AUD_EXT   (1 <<  4)
 133 #define PCI_MSK_AUD_INT   (1 <<  3)
 134 /*
 135  * BOARD Specific: Sets audio DMA
 136  */
 137
 138 static int _cx25821_start_audio_dma(snd_cx25821_card_t * chip)
 139 {
 140         struct cx25821_buffer *buf = chip->buf;
 141         struct cx25821_dev *dev = chip->dev;
 142         struct sram_channel *audio_ch =
 143             &cx25821_sram_channels[AUDIO_SRAM_CHANNEL];
 144         u32 tmp = 0;
 145
 146         // enable output on the GPIO 0 for the MCLK ADC (Audio)
 147         cx25821_set_gpiopin_direction(chip->dev, 0, 0);
 148
 149         /* Make sure RISC/FIFO are off before changing FIFO/RISC settings */
 150         cx_clear(AUD_INT_DMA_CTL,
 151                  FLD_AUD_DST_A_RISC_EN | FLD_AUD_DST_A_FIFO_EN);
 152
 153         /* setup fifo + format - out channel */
 154         cx25821_sram_channel_setup_audio(chip->dev, audio_ch, buf->bpl,
 155                                          buf->risc.dma);
 156
 157         /* sets bpl size */
 158         cx_write(AUD_A_LNGTH, buf->bpl);
 159
 160         /* reset counter */
 161         cx_write(AUD_A_GPCNT_CTL, GP_COUNT_CONTROL_RESET);      //GP_COUNT_CONTROL_RESET = 0x3
 162         atomic_set(&chip->count, 0);
 163
 164         //Set the input mode to 16-bit
 165         tmp = cx_read(AUD_A_CFG);
 166         cx_write(AUD_A_CFG,
 167                  tmp | FLD_AUD_DST_PK_MODE | FLD_AUD_DST_ENABLE |
 168                  FLD_AUD_CLK_ENABLE);
 169
 170         //printk(KERN_INFO "DEBUG: Start audio DMA, %d B/line, cmds_start(0x%x)= %d lines/FIFO, %d periods, %d "
 171         //      "byte buffer\n", buf->bpl, audio_ch->cmds_start, cx_read(audio_ch->cmds_start + 12)>>1,
 172         //      chip->num_periods, buf->bpl * chip->num_periods);
 173
 174         /* Enables corresponding bits at AUD_INT_STAT */
 175         cx_write(AUD_A_INT_MSK,
 176                  FLD_AUD_DST_RISCI1 | FLD_AUD_DST_OF | FLD_AUD_DST_SYNC |
 177                  FLD_AUD_DST_OPC_ERR);
 178
 179         /* Clean any pending interrupt bits already set */
 180         cx_write(AUD_A_INT_STAT, ~0);
 181
 182         /* enable audio irqs */
 183         cx_set(PCI_INT_MSK, chip->dev->pci_irqmask | PCI_MSK_AUD_INT);
 184
 185         // Turn on audio downstream fifo and risc enable 0x101
 186         tmp = cx_read(AUD_INT_DMA_CTL);
 187         cx_set(AUD_INT_DMA_CTL,
 188                tmp | (FLD_AUD_DST_A_RISC_EN | FLD_AUD_DST_A_FIFO_EN));
 189
 190         mdelay(100);
 191         return 0;
 192 }
 193
 194 /*
 195  * BOARD Specific: Resets audio DMA
 196  */
 197 static int _cx25821_stop_audio_dma(snd_cx25821_card_t * chip)
 198 {
 199         struct cx25821_dev *dev = chip->dev;
 200
 201         /* stop dma */
 202         cx_clear(AUD_INT_DMA_CTL,
 203                  FLD_AUD_DST_A_RISC_EN | FLD_AUD_DST_A_FIFO_EN);
 204
 205         /* disable irqs */
 206         cx_clear(PCI_INT_MSK, PCI_MSK_AUD_INT);
 207         cx_clear(AUD_A_INT_MSK,
 208                  AUD_INT_OPC_ERR | AUD_INT_DN_SYNC | AUD_INT_DN_RISCI2 |
 209                  AUD_INT_DN_RISCI1);
 210
 211         return 0;
 212 }
 213
 214 #define MAX_IRQ_LOOP 50
 215
 216 /*
 217  * BOARD Specific: IRQ dma bits
 218  */
 219 static char *cx25821_aud_irqs[32] = {
 220         "dn_risci1", "up_risci1", "rds_dn_risc1",       /* 0-2 */
 221         NULL,                   /* reserved */
 222         "dn_risci2", "up_risci2", "rds_dn_risc2",       /* 4-6 */
 223         NULL,                   /* reserved */
 224         "dnf_of", "upf_uf", "rds_dnf_uf",       /* 8-10 */
 225         NULL,                   /* reserved */
 226         "dn_sync", "up_sync", "rds_dn_sync",    /* 12-14 */
 227         NULL,                   /* reserved */
 228         "opc_err", "par_err", "rip_err",        /* 16-18 */
 229         "pci_abort", "ber_irq", "mchg_irq"      /* 19-21 */
 230 };
 231
 232 /*
 233  * BOARD Specific: Threats IRQ audio specific calls
 234  */
 235 static void cx25821_aud_irq(snd_cx25821_card_t * chip, u32 status, u32 mask)
 236 {
 237         struct cx25821_dev *dev = chip->dev;
 238
 239         if (0 == (status & mask)) {
 240                 return;
 241         }
 242
 243         cx_write(AUD_A_INT_STAT, status);
 244         if (debug > 1 || (status & mask & ~0xff))
 245                 cx25821_print_irqbits(dev->name, "irq aud",
 246                                       cx25821_aud_irqs,
 247                                       ARRAY_SIZE(cx25821_aud_irqs), status,
 248                                       mask);
 249
 250         /* risc op code error */
 251         if (status & AUD_INT_OPC_ERR) {
 252                 printk(KERN_WARNING "WARNING %s/1: Audio risc op code error\n",
 253                        dev->name);
 254
 255                 cx_clear(AUD_INT_DMA_CTL,
 256                          FLD_AUD_DST_A_RISC_EN | FLD_AUD_DST_A_FIFO_EN);
 257                 cx25821_sram_channel_dump_audio(dev,
 258                                                 &cx25821_sram_channels
 259                                                 [AUDIO_SRAM_CHANNEL]);
 260         }
 261         if (status & AUD_INT_DN_SYNC) {
 262                 printk(KERN_WARNING "WARNING %s: Downstream sync error!\n",
 263                        dev->name);
 264                 cx_write(AUD_A_GPCNT_CTL, GP_COUNT_CONTROL_RESET);
 265                 return;
 266         }
 267
 268         /* risc1 downstream */
 269         if (status & AUD_INT_DN_RISCI1) {
 270                 atomic_set(&chip->count, cx_read(AUD_A_GPCNT));
 271                 snd_pcm_period_elapsed(chip->substream);
 272         }
 273 }
 274
 275 /*
 276  * BOARD Specific: Handles IRQ calls
 277  */
 278 static irqreturn_t cx25821_irq(int irq, void *dev_id)
 279 {
 280         snd_cx25821_card_t *chip = dev_id;
 281         struct cx25821_dev *dev = chip->dev;
 282         u32 status, pci_status;
 283         u32 audint_status, audint_mask;
 284         int loop, handled = 0;
 285         int audint_count = 0;
 286
 287         audint_status = cx_read(AUD_A_INT_STAT);
 288         audint_mask = cx_read(AUD_A_INT_MSK);
 289         audint_count = cx_read(AUD_A_GPCNT);
 290         status = cx_read(PCI_INT_STAT);
 291
 292         for (loop = 0; loop < 1; loop++) {
 293                 status = cx_read(PCI_INT_STAT);
 294                 if (0 == status) {
 295                         status = cx_read(PCI_INT_STAT);
 296                         audint_status = cx_read(AUD_A_INT_STAT);
 297                         audint_mask = cx_read(AUD_A_INT_MSK);
 298
 299                         if (status) {
 300                                 handled = 1;
 301                                 cx_write(PCI_INT_STAT, status);
 302
 303                                 cx25821_aud_irq(chip, audint_status,
 304                                                 audint_mask);
 305                                 break;
 306                         } else
 307                                 goto out;
 308                 }
 309
 310                 handled = 1;
 311                 cx_write(PCI_INT_STAT, status);
 312
 313                 cx25821_aud_irq(chip, audint_status, audint_mask);
 314         }
 315
 316         pci_status = cx_read(PCI_INT_STAT);
 317
 318         if (handled)
 319                 cx_write(PCI_INT_STAT, pci_status);
 320
 321       out:
 322         return IRQ_RETVAL(handled);
 323 }
 324
 325 static int dsp_buffer_free(snd_cx25821_card_t * chip)
 326 {
 327         BUG_ON(!chip->dma_size);
 328
 329         dprintk(2, "Freeing buffer\n");
 330         videobuf_sg_dma_unmap(&chip->pci->dev, chip->dma_risc);
 331         videobuf_dma_free(chip->dma_risc);
 332         btcx_riscmem_free(chip->pci, &chip->buf->risc);
 333         kfree(chip->buf);
 334
 335         chip->dma_risc = NULL;
 336         chip->dma_size = 0;
 337
 338         return 0;
 339 }
 340
 341 /****************************************************************************
 342                                 ALSA PCM Interface
 343  ****************************************************************************/
 344
 345 /*
 346  * Digital hardware definition
 347  */
 348 #define DEFAULT_FIFO_SIZE       384
 349 static struct snd_pcm_hardware snd_cx25821_digital_hw = {
 350         .info = SNDRV_PCM_INFO_MMAP |
 351             SNDRV_PCM_INFO_INTERLEAVED |
 352             SNDRV_PCM_INFO_BLOCK_TRANSFER | SNDRV_PCM_INFO_MMAP_VALID,
 353         .formats = SNDRV_PCM_FMTBIT_S16_LE,
 354
 355         .rates = SNDRV_PCM_RATE_48000,
 356         .rate_min = 48000,
 357         .rate_max = 48000,
 358         .channels_min = 2,
 359         .channels_max = 2,
 360         /* Analog audio output will be full of clicks and pops if there
 361            are not exactly four lines in the SRAM FIFO buffer.  */
 362         .period_bytes_min = DEFAULT_FIFO_SIZE / 3,
 363         .period_bytes_max = DEFAULT_FIFO_SIZE / 3,
 364         .periods_min = 1,
 365         .periods_max = AUDIO_LINE_SIZE,
 366         .buffer_bytes_max = (AUDIO_LINE_SIZE * AUDIO_LINE_SIZE),        //128*128 = 16384 = 1024 * 16
 367 };
 368
 369 /*
 370  * audio pcm capture open callback
 371  */
 372 static int snd_cx25821_pcm_open(struct snd_pcm_substream *substream)
 373 {
 374         snd_cx25821_card_t *chip = snd_pcm_substream_chip(substream);
 375         struct snd_pcm_runtime *runtime = substream->runtime;
 376         int err;
 377         unsigned int bpl = 0;
 378
 379         if (!chip) {
 380                 printk(KERN_ERR "DEBUG: cx25821 can't find device struct."
 381                        " Can't proceed with open\n");
 382                 return -ENODEV;
 383         }
 384
 385         err =
 386             snd_pcm_hw_constraint_pow2(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS);
 387         if (err < 0)
 388                 goto _error;
 389
 390         chip->substream = substream;
 391
 392         runtime->hw = snd_cx25821_digital_hw;
 393
 394         if (cx25821_sram_channels[AUDIO_SRAM_CHANNEL].fifo_size !=
 395             DEFAULT_FIFO_SIZE) {
 396                 bpl = cx25821_sram_channels[AUDIO_SRAM_CHANNEL].fifo_size / 3;  //since there are 3 audio Clusters
 397                 bpl &= ~7;      /* must be multiple of 8 */
 398
 399                 if (bpl > AUDIO_LINE_SIZE) {
 400                         bpl = AUDIO_LINE_SIZE;
 401                 }
 402                 runtime->hw.period_bytes_min = bpl;
 403                 runtime->hw.period_bytes_max = bpl;
 404         }
 405
 406         return 0;
 407       _error:
 408         dprintk(1, "Error opening PCM!\n");
 409         return err;
 410 }
 411
 412 /*
 413  * audio close callback
 414  */
 415 static int snd_cx25821_close(struct snd_pcm_substream *substream)
 416 {
 417         return 0;
 418 }
 419
 420 /*
 421  * hw_params callback
 422  */
 423 static int snd_cx25821_hw_params(struct snd_pcm_substream *substream,
 424                                  struct snd_pcm_hw_params *hw_params)
 425 {
 426         snd_cx25821_card_t *chip = snd_pcm_substream_chip(substream);
 427         struct videobuf_dmabuf *dma;
 428
 429         struct cx25821_buffer *buf;
 430         int ret;
 431
 432         if (substream->runtime->dma_area) {
 433                 dsp_buffer_free(chip);
 434                 substream->runtime->dma_area = NULL;
 435         }
 436
 437         chip->period_size = params_period_bytes(hw_params);
 438         chip->num_periods = params_periods(hw_params);
 439         chip->dma_size = chip->period_size * params_periods(hw_params);
 440
 441         BUG_ON(!chip->dma_size);
 442         BUG_ON(chip->num_periods & (chip->num_periods - 1));
 443
 444         buf = videobuf_sg_alloc(sizeof(*buf));
 445         if (NULL == buf)
 446                 return -ENOMEM;
 447
 448         if (chip->period_size > AUDIO_LINE_SIZE) {
 449                 chip->period_size = AUDIO_LINE_SIZE;
 450         }
 451
 452         buf->vb.memory = V4L2_MEMORY_MMAP;
 453         buf->vb.field = V4L2_FIELD_NONE;
 454         buf->vb.width = chip->period_size;
 455         buf->bpl = chip->period_size;
 456         buf->vb.height = chip->num_periods;
 457         buf->vb.size = chip->dma_size;
 458
 459         dma = videobuf_to_dma(&buf->vb);
 460         videobuf_dma_init(dma);
 461
 462         ret = videobuf_dma_init_kernel(dma, PCI_DMA_FROMDEVICE,
 463                                        (PAGE_ALIGN(buf->vb.size) >>
 464                                         PAGE_SHIFT));
 465         if (ret < 0)
 466                 goto error;
 467
 468         ret = videobuf_sg_dma_map(&chip->pci->dev, dma);
 469         if (ret < 0)
 470                 goto error;
 471
 472         ret =
 473             cx25821_risc_databuffer_audio(chip->pci, &buf->risc, dma->sglist,
 474                                           buf->vb.width, buf->vb.height, 1);
 475         if (ret < 0) {
 476                 printk(KERN_INFO
 477                        "DEBUG: ERROR after cx25821_risc_databuffer_audio() \n");
 478                 goto error;
 479         }
 480
 481         /* Loop back to start of program */
 482         buf->risc.jmp[0] = cpu_to_le32(RISC_JUMP | RISC_IRQ1 | RISC_CNT_INC);
 483         buf->risc.jmp[1] = cpu_to_le32(buf->risc.dma);
 484         buf->risc.jmp[2] = cpu_to_le32(0);      /* bits 63-32 */
 485
 486         buf->vb.state = VIDEOBUF_PREPARED;
 487
 488         chip->buf = buf;
 489         chip->dma_risc = dma;
 490
 491         substream->runtime->dma_area = chip->dma_risc->vmalloc;
 492         substream->runtime->dma_bytes = chip->dma_size;
 493         substream->runtime->dma_addr = 0;
 494
 495         return 0;
 496
 497       error:
 498         kfree(buf);
 499         return ret;
 500 }
 501
 502 /*
 503  * hw free callback
 504  */
 505 static int snd_cx25821_hw_free(struct snd_pcm_substream *substream)
 506 {
 507         snd_cx25821_card_t *chip = snd_pcm_substream_chip(substream);
 508
 509         if (substream->runtime->dma_area) {
 510                 dsp_buffer_free(chip);
 511                 substream->runtime->dma_area = NULL;
 512         }
 513
 514         return 0;
 515 }
 516
 517 /*
 518  * prepare callback
 519  */
 520 static int snd_cx25821_prepare(struct snd_pcm_substream *substream)
 521 {
 522         return 0;
 523 }
 524
 525 /*
 526  * trigger callback
 527  */
 528 static int snd_cx25821_card_trigger(struct snd_pcm_substream *substream,
 529                                     int cmd)
 530 {
 531         snd_cx25821_card_t *chip = snd_pcm_substream_chip(substream);
 532         int err = 0;
 533
 534         /* Local interrupts are already disabled by ALSA */
 535         spin_lock(&chip->reg_lock);
 536
 537         switch (cmd) {
 538         case SNDRV_PCM_TRIGGER_START:
 539                 err = _cx25821_start_audio_dma(chip);
 540                 break;
 541         case SNDRV_PCM_TRIGGER_STOP:
 542                 err = _cx25821_stop_audio_dma(chip);
 543                 break;
 544         default:
 545                 err = -EINVAL;
 546                 break;
 547         }
 548
 549         spin_unlock(&chip->reg_lock);
 550
 551         return err;
 552 }
 553
 554 /*
 555  * pointer callback
 556  */
 557 static snd_pcm_uframes_t snd_cx25821_pointer(struct snd_pcm_substream
 558                                              *substream)
 559 {
 560         snd_cx25821_card_t *chip = snd_pcm_substream_chip(substream);
 561         struct snd_pcm_runtime *runtime = substream->runtime;
 562         u16 count;
 563
 564         count = atomic_read(&chip->count);
 565
 566         return runtime->period_size * (count & (runtime->periods - 1));
 567 }
 568
 569 /*
 570  * page callback (needed for mmap)
 571  */
 572 static struct page *snd_cx25821_page(struct snd_pcm_substream *substream,
 573                                      unsigned long offset)
 574 {
 575         void *pageptr = substream->runtime->dma_area + offset;
 576
 577         return vmalloc_to_page(pageptr);
 578 }
 579
 580 /*
 581  * operators
 582  */
 583 static struct snd_pcm_ops snd_cx25821_pcm_ops = {
 584         .open = snd_cx25821_pcm_open,
 585         .close = snd_cx25821_close,
 586         .ioctl = snd_pcm_lib_ioctl,
 587         .hw_params = snd_cx25821_hw_params,
 588         .hw_free = snd_cx25821_hw_free,
 589         .prepare = snd_cx25821_prepare,
 590         .trigger = snd_cx25821_card_trigger,
 591         .pointer = snd_cx25821_pointer,
 592         .page = snd_cx25821_page,
 593 };
 594
 595 /*
 596  * ALSA create a PCM device:  Called when initializing the board. Sets up the name and hooks up
 597  *  the callbacks
 598  */
 599 static int snd_cx25821_pcm(snd_cx25821_card_t * chip, int device, char *name)
 600 {
 601         struct snd_pcm *pcm;
 602         int err;
 603
 604         err = snd_pcm_new(chip->card, name, device, 0, 1, &pcm);
 605         if (err < 0) {
 606                 printk(KERN_INFO "ERROR: FAILED snd_pcm_new() in %s\n",
 607                        __func__);
 608                 return err;
 609         }
 610         pcm->private_data = chip;
 611         pcm->info_flags = 0;
 612         strcpy(pcm->name, name);
 613         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_cx25821_pcm_ops);
 614
 615         return 0;
 616 }
 617
 618 /****************************************************************************
 619                         Basic Flow for Sound Devices
 620  ****************************************************************************/
 621
 622 /*
 623  * PCI ID Table - 14f1:8801 and 14f1:8811 means function 1: Audio
 624  * Only boards with eeprom and byte 1 at eeprom=1 have it
 625  */
 626
 627 static struct pci_device_id cx25821_audio_pci_tbl[] __devinitdata = {
 628         {0x14f1, 0x0920, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
 629         {0,}
 630 };
 631
 632 MODULE_DEVICE_TABLE(pci, cx25821_audio_pci_tbl);
 633
 634 /*
 635  * Not used in the function snd_cx25821_dev_free so removing
 636  * from the file.
 637  */
 638 /*
 639 static int snd_cx25821_free(snd_cx25821_card_t *chip)
 640 {
 641         if (chip->irq >= 0)
 642                 free_irq(chip->irq, chip);
 643
 644         cx25821_dev_unregister(chip->dev);
 645         pci_disable_device(chip->pci);
 646
 647         return 0;
 648 }
 649 */
 650
 651 /*
 652  * Component Destructor
 653  */
 654 static void snd_cx25821_dev_free(struct snd_card *card)
 655 {
 656         snd_cx25821_card_t *chip = card->private_data;
 657
 658         //snd_cx25821_free(chip);
 659         snd_card_free(chip->card);
 660 }
 661
 662 /*
 663  * Alsa Constructor - Component probe
 664  */
 665 static int cx25821_audio_initdev(struct cx25821_dev *dev)
 666 {
 667         struct snd_card *card;
 668         snd_cx25821_card_t *chip;
 669         int err;
 670
 671         if (devno >= SNDRV_CARDS) {
 672                 printk(KERN_INFO "DEBUG ERROR: devno >= SNDRV_CARDS %s\n",
 673                        __func__);
 674                 return (-ENODEV);
 675         }
 676
 677         if (!enable[devno]) {
 678                 ++devno;
 679                 printk(KERN_INFO "DEBUG ERROR: !enable[devno] %s\n", __func__);
 680                 return (-ENOENT);
 681         }
 682
 683         err = snd_card_create(index[devno], id[devno], THIS_MODULE,
 684                          sizeof(snd_cx25821_card_t), &card);
 685         if (err < 0) {
 686                 printk(KERN_INFO
 687                        "DEBUG ERROR: cannot create snd_card_new in %s\n",
 688                        __func__);
 689                 return err;
 690         }
 691
 692         strcpy(card->driver, "cx25821");
 693
 694         /* Card "creation" */
 695         card->private_free = snd_cx25821_dev_free;
 696         chip = (snd_cx25821_card_t *) card->private_data;
 697         spin_lock_init(&chip->reg_lock);
 698
 699         chip->dev = dev;
 700         chip->card = card;
 701         chip->pci = dev->pci;
 702         chip->iobase = pci_resource_start(dev->pci, 0);
 703
 704         chip->irq = dev->pci->irq;
 705
 706         err = request_irq(dev->pci->irq, cx25821_irq,
 707                           IRQF_SHARED | IRQF_DISABLED, chip->dev->name, chip);
 708
 709         if (err < 0) {
 710                 printk(KERN_ERR "ERROR %s: can't get IRQ %d for ALSA\n",
 711                        chip->dev->name, dev->pci->irq);
 712                 goto error;
 713         }
 714
 715         if ((err = snd_cx25821_pcm(chip, 0, "cx25821 Digital")) < 0) {
 716                 printk(KERN_INFO
 717                        "DEBUG ERROR: cannot create snd_cx25821_pcm %s\n",
 718                        __func__);
 719                 goto error;
 720         }
 721
 722         snd_card_set_dev(card, &chip->pci->dev);
 723
 724         strcpy(card->shortname, "cx25821");
 725         sprintf(card->longname, "%s at 0x%lx irq %d", chip->dev->name,
 726                 chip->iobase, chip->irq);
 727         strcpy(card->mixername, "CX25821");
 728
 729         printk(KERN_INFO "%s/%i: ALSA support for cx25821 boards\n",
 730                card->driver, devno);
 731
 732         err = snd_card_register(card);
 733         if (err < 0) {
 734                 printk(KERN_INFO "DEBUG ERROR: cannot register sound card %s\n",
 735                        __func__);
 736                 goto error;
 737         }
 738
 739         snd_cx25821_cards[devno] = card;
 740
 741         devno++;
 742         return 0;
 743
 744       error:
 745         snd_card_free(card);
 746         return err;
 747 }
 748
 749 /****************************************************************************
 750                                 LINUX MODULE INIT
 751  ****************************************************************************/
 752 static void cx25821_audio_fini(void)
 753 {
 754         snd_card_free(snd_cx25821_cards[0]);
 755 }
 756
 757 /*
 758  * Module initializer
 759  *
 760  * Loops through present saa7134 cards, and assigns an ALSA device
 761  * to each one
 762  *
 763  */
 764 static int cx25821_alsa_init(void)
 765 {
 766         struct cx25821_dev *dev = NULL;
 767         struct list_head *list;
 768
 769         list_for_each(list, &cx25821_devlist) {
 770                 dev = list_entry(list, struct cx25821_dev, devlist);
 771                 cx25821_audio_initdev(dev);
 772         }
 773
 774         if (dev == NULL)
 775                 printk(KERN_INFO
 776                        "cx25821 ERROR ALSA: no cx25821 cards found\n");
 777
 778         return 0;
 779
 780 }
 781
 782 late_initcall(cx25821_alsa_init);
 783 module_exit(cx25821_audio_fini);
 784
 785 /* ----------------------------------------------------------- */
 786 /*
 787  * Local variables:
 788  * c-basic-offset: 8
 789  * End:
 790  */