LXR linux/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...)                             \
  48do {                                                            \
  49        if (debug >= level)                                     \
  50                pr_info("%s/1: " fmt, chip->dev->name, ##arg);  \
  51} while (0)
  52#define dprintk_core(level, fmt, arg...)                                \
  53do {                                                                    \
  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
  62static struct snd_card *snd_cx25821_cards[SNDRV_CARDS];
  63static int devno;
  64
  65struct cx25821_audio_buffer {
  66        unsigned int bpl;
  67        struct btcx_riscmem risc;
  68        struct videobuf_dmabuf dma;
  69};
  70
  71struct 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
 103static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;      /* Index 0-MAX */
 104static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;       /* ID for this card */
 105static bool enable[SNDRV_CARDS] = { 1, [1 ... (SNDRV_CARDS - 1)] = 1 };
 106
 107module_param_array(enable, bool, NULL, 0444);
 108MODULE_PARM_DESC(enable, "Enable cx25821 soundcard. default enabled.");
 109
 110module_param_array(index, int, NULL, 0444);
 111MODULE_PARM_DESC(index, "Index value for cx25821 capture interface(s).");
 112
 113/****************************************************************************
 114                                Module macros
 115 ****************************************************************************/
 116
 117MODULE_DESCRIPTION("ALSA driver module for cx25821 based capture cards");
 118MODULE_AUTHOR("Hiep Huynh");
 119MODULE_LICENSE("GPL");
 120MODULE_SUPPORTED_DEVICE("{{Conexant,25821}");   /* "{{Conexant,23881}," */
 121
 122static unsigned int debug;
 123module_param(debug, int, 0644);
 124MODULE_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
 150static 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 */
 211static 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 */
 232static 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 */
 248static 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 */
 286static 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
 330out:
 331        return IRQ_RETVAL(handled);
 332}
 333
 334static 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
 358static 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 */
 381static 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 */
 424static int snd_cx25821_close(struct snd_pcm_substream *substream)
 425{
 426        return 0;
 427}
 428
 429/*
 430 * hw_params callback
 431 */
 432static 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
 494error:
 495        kfree(buf);
 496        return ret;
 497}
 498
 499/*
 500 * hw free callback
 501 */
 502static 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 */
 517static int snd_cx25821_prepare(struct snd_pcm_substream *substream)
 518{
 519        return 0;
 520}
 521
 522/*
 523 * trigger callback
 524 */
 525static 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 */
 554static 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 */
 569static 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 */
 580static 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 */
 596static 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
 624static DEFINE_PCI_DEVICE_TABLE(cx25821_audio_pci_tbl) = {
 625        {0x14f1, 0x0920, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
 626        {0,}
 627};
 628
 629MODULE_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/*
 636static 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 */
 651static 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 */
 662static 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
 739error:
 740        snd_card_free(card);
 741        return err;
 742}
 743
 744/****************************************************************************
 745                                LINUX MODULE INIT
 746 ****************************************************************************/
 747static 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 */
 759static 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
 778late_initcall(cx25821_alsa_init);
 779module_exit(cx25821_audio_fini);
 780
 781/* ----------------------------------------------------------- */
 782/*
 783 * Local variables:
 784 * c-basic-offset: 8
 785 * End:
 786 */
 787