LXR linux/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
  54static struct snd_card *snd_cx25821_cards[SNDRV_CARDS];
  55static int devno;
  56
  57struct 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};
  83typedef struct cx25821_audio_dev snd_cx25821_card_t;
  84
  85
  86/****************************************************************************
  87                        Module global static vars
  88 ****************************************************************************/
  89
  90static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;      /* Index 0-MAX */
  91static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;       /* ID for this card */
  92static int enable[SNDRV_CARDS] = { 1,[1 ... (SNDRV_CARDS - 1)] = 1 };
  93
  94module_param_array(enable, bool, NULL, 0444);
  95MODULE_PARM_DESC(enable, "Enable cx25821 soundcard. default enabled.");
  96
  97module_param_array(index, int, NULL, 0444);
  98MODULE_PARM_DESC(index, "Index value for cx25821 capture interface(s).");
  99
 100/****************************************************************************
 101                                Module macros
 102 ****************************************************************************/
 103
 104MODULE_DESCRIPTION("ALSA driver module for cx25821 based capture cards");
 105MODULE_AUTHOR("Hiep Huynh");
 106MODULE_LICENSE("GPL");
 107MODULE_SUPPORTED_DEVICE("{{Conexant,25821}");   //"{{Conexant,23881},"
 108
 109static unsigned int debug;
 110module_param(debug, int, 0644);
 111MODULE_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
 137static 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 */
 196static 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 */
 218static 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 */
 234static 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 */
 277static 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
 324static 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
 348static 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 */
 371static 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 */
 414static int snd_cx25821_close(struct snd_pcm_substream *substream)
 415{
 416        return 0;
 417}
 418
 419/*
 420 * hw_params callback
 421 */
 422static 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 */
 504static 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 */
 519static int snd_cx25821_prepare(struct snd_pcm_substream *substream)
 520{
 521        return 0;
 522}
 523
 524/*
 525 * trigger callback
 526 */
 527static 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 */
 556static 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 */
 571static 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 */
 582static 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 */
 598static 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
 626static 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
 631MODULE_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/*
 638static 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 */
 653static 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 */
 664static 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 ****************************************************************************/
 751static 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 */
 763static 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
 781late_initcall(cx25821_alsa_init);
 782module_exit(cx25821_audio_fini);
 783
 784/* ----------------------------------------------------------- */
 785/*
 786 * Local variables:
 787 * c-basic-offset: 8
 788 * End:
 789 */
 790